JP6554964B2 - Grinder - Google Patents

Description

  The present invention relates to a grinding machine.

  There is known a grinding machine in which a measuring instrument for measuring the outer diameter of a shaft-shaped workpiece is displaced about the same rotation center axis as a grinding wheel for grinding an outer peripheral surface of the workpiece. Patent Document 1 describes a grinding machine in which a driven lever that holds a measuring instrument is supported so as to be relatively rotatable with respect to a tilting arm that is displaced around the same rotation center axis as a grinding wheel.

  In the grinding machine of Patent Document 1, a servo motor for rotating the driven lever and a servo motor for rotating the tilt arm are separately provided. In the grinding machine disclosed in Patent Document 1, the position of the measuring instrument is adjusted by displacing the tilting arm and the driven lever so that the measuring instrument does not contact the grinding wheel when the measuring instrument approaches or separates from the workpiece. I have to.

Japanese Patent No. 5064571

  In the grinding machine of Patent Document 1, two servo motors are controlled to rotate the tilt arm and the driven lever independently. This complicates the mechanism for displacing the measuring instrument and increases the number of parts.

  This invention is made | formed in view of such a situation, and it aims at providing the grinding machine which can simplify the mechanism for displacing a measuring device and can reduce a number of parts.

  The grinding machine of the present invention is supported by a spindle head that rotatably supports a shaft-shaped workpiece, a grinding wheel base that moves relative to the spindle base, and is rotatably supported by the grinding wheel base about a first axis. A grinding wheel that grinds the workpiece, a rotary arm that is provided on the grinding wheel platform, and whose base end side is driven to rotate about the first axis, and a first arm that is parallel to the first axis with respect to the distal end side of the rotary arm. A measuring device capable of measuring the outer diameter of the workpiece in contact with the workpiece supported by the headstock, and dangling so as to be relatively rotatable about two axes; When the measuring device moves away from the workpiece due to the rotation of the rotating arm so that two axes are displaced upward, the measuring device is guided while maintaining the non-contact state between the measuring device and the grinding wheel. And a guiding unit.

(effect)
According to the grinding machine of the present invention, the rotary arm is supported so as to be rotatable about the first axis, and the measuring device is suspended on the rotary arm. Therefore, when the rotary arm is driven to rotate about the first axis. The measuring device is displaced around the first axis. When the rotating device is rotated so that the second shaft is displaced upward and the measuring device is moved away from the workpiece, the measuring device is guided by the guide unit and maintained in a state where it cannot contact the grinding wheel.

  Thus, the grinding machine according to the present invention can maintain the non-contact state between the measuring device and the workpiece without rotating the measuring device independently of the rotating arm. Therefore, the structure for displacing the measuring device can be simplified, and the number of parts can be reduced. As a result, the manufacturing cost of the grinding machine can be suppressed.

It is a side view of the grinding machine in embodiment of this invention, and the figure which has a measuring device in a standby state is shown. It is the figure which abbreviate | omitted the rotation arm and the measuring apparatus from the grinding machine shown in FIG. It is a side view of a rotation arm and a measuring device among the structures of the grinding machine shown in FIG. It is sectional drawing of a grinding machine, and the figure which the workpiece and measuring device which are located in the highest position are in a contact state is shown. It is sectional drawing of a grinding machine, and the figure which the workpiece and measuring device located in the lowest position are in a contact state is shown. It is sectional drawing of a grinding machine, and the figure which is in the state which retracted the measuring device further from the standby state is shown.

(1. Configuration of grinding machine)
Hereinafter, an embodiment to which a grinding machine according to the present invention is applied will be described by taking as an example a grinding wheel traverse type grinding machine 1 for processing a crank pin (hereinafter referred to as “workpiece Wa”) of a crankshaft W. . In FIGS. 1 and 2, only the main part of the grinding machine 1 is shown.

  As shown in FIG. 1, the grinding machine 1 includes a bed 11, a headstock 12, a traverse table 13, a grinding wheel base 14, a grinding wheel 15, a grinding wheel cover 16, a nozzle 17, a rotating arm 20, And a measuring device 30.

  As shown in FIG. 2, the headstock 12 is fixed on the bed 11, and a tailstock (not shown) is disposed on the bed 11 so as to face each other in the Z-axis direction. The crankshaft W is supported so as to be rotatable about a rotation axis A0 parallel to the Z axis, with both ends thereof supported by the headstock 12 and the tailstock. The spindle stock 12 is provided with a spindle rotating motor (not shown) controlled by a control device (not shown), and the crankshaft W is rotated around the rotation axis A0 by a rotational driving force applied from the spindle rotating motor. Rotate.

  The traverse table 13 is provided on the bed 11 at a position away from the headstock 12 and the tailstock in the X-axis direction, and is movable on the bed 11 in the Z-axis direction. The grindstone table 14 is provided on the traverse table 13 so as to be movable in the X-axis direction. On the grindstone table 14, a support shaft 14a having a first axis A1 parallel to the Z-axis direction as an axis is provided. . The grinding wheel 15 is supported so as to be rotatable about the first axis A1 with respect to the support shaft 14a. The grinding wheel base 14 is provided with a grinding wheel rotation motor (not shown) controlled by the control device described above, and the grinding wheel 15 is rotated around the first axis A1 by the rotational driving force applied from the grinding wheel rotation motor. Rotate.

  The grinding wheel cover 16 is provided on the grinding wheel base 14 and covers a part of the grinding wheel 15. The nozzle 17 is attached to the upper part of the grindstone cover 16, and the tip of the nozzle 17 is directed to the grinding portion of the grinding wheel 15. The nozzle 17 is connected to a coolant supply device (not shown), and the coolant supplied from the coolant supply device is supplied from the nozzle 17 to the grinding portion of the grinding wheel 15. The grindstone cover 16 prevents the coolant supplied from the nozzle 17 to the grinding portion of the grinding wheel 15 from scattering. In addition, as a coolant supplied from a coolant supply apparatus, a water-soluble coolant, a water-insoluble coolant, etc. are illustrated and adjusted according to a processing method etc.

  The nozzle 17 is provided with a rolling surface 17a on the surface facing the headstock 12 and the tailstock (the surface facing the left side in FIG. 2). The rolling surface 17a is a portion formed in a flat surface shape, and is configured such that a roller 36a (see FIG. 3) of the protrusion 36 described later can roll.

  As described above, the crankshaft W rotates around the rotation axis A0 by supporting both ends of the crankshaft W on the headstock 12 and the tailstock. The workpiece Wa is a shaft-like member, and is provided at a position where the axis is eccentric from the rotation axis A0. Therefore, when the crankshaft W is rotated, the workpiece Wa revolves around the rotation axis A0. In FIGS. 1 and 2, the state where the workpiece Wa is positioned at the highest position is the solid line, the lowest position, the frontmost position (left side in FIGS. 1 and 2), and the last position (right side in FIGS. 1 and 2). Is shown by a broken line.

  The control device displaces the grindstone platform 14 in the X-axis direction while synchronizing with the revolution of the workpiece Wa while performing the grinding process. Thereby, the grinding wheel 15 is made to follow the displacement of the workpiece Wa, and the state where the grinding wheel 15 is in contact with the workpiece Wa is maintained.

(2. Rotating arm 20 and measuring device 30)
As shown in FIG. 3, the rotary arm 20 is a member that is bent into an L shape. The rotary arm 20 has a base end portion 21 (lower right portion in FIG. 3) formed in an annular shape, and is configured to be able to penetrate the support shaft 14a (see FIG. 1) with respect to the base end portion 21.

  The rotary arm 20 is supported so as to be rotatable about the first axis A1 with respect to the support shaft 14a by penetrating the base end portion 21 through the support shaft 14a. The grinding wheel base 14 is provided with an arm rotation motor (not shown) controlled by the control device (not shown), and the rotation arm 20 has a first axis A1 by a rotational driving force applied from the arm rotation motor. Rotate around.

  The rotary arm 20 has a connecting shaft 22 projecting from the distal end of the rotating arm 20 and having a second axis A2 parallel to the Z axis as a center, and the measuring device 30 is connected to the connecting shaft 22.

  The measuring device 30 is a device that measures the outer diameter of the workpiece Wa ground by the grinding wheel 15. The measuring device 30 includes a main body 33 having a pair of guides 31 and a probe 32, a support bar 34, a connecting member 35, and a protruding portion 36.

  The pair of guides 31 are portions that protrude from the one surface side of the main body 33 and are opposed to each other with a space therebetween. The measuring element 32 is a part protruding from between the pair of guides 31 on one surface side of the main body 33. When measuring the outer diameter of the workpiece Wa, based on control by a control device (not shown), the measuring element 32 is brought into contact with the workpiece Wa while the outer peripheral surface of the workpiece Wa is supported by the pair of guides 31. The outer diameter of the workpiece Wa is measured by the measuring element 32. The measurement result by the probe 32 is sent to the control device.

  The support bar 34 is a bar-like portion fixed to the other side of the main body 33 opposite to the one side where the pair of guides 31 and the measuring element 32 protrude. The connecting member 35 is a part for connecting the support bar 34 to the rotary arm 20. The connecting member 35 includes a holding portion 35a for holding the support rod 34 and a connecting hole 35b through which the connecting shaft 22 of the rotary arm 20 can be inserted, and the connecting hole 35b is formed to penetrate at a position away from the holding portion 35a. Yes.

  In the measuring device 30, the connection hole 35 b is inserted into the connection shaft 22 in a state where the holding portion 35 a is disposed on the opposite side (left side in FIG. 3) to the connection hole 35 b. The measuring device 30 is suspended by its own weight with respect to the connecting shaft 22, and is supported so as to be rotatable around the second axis A2. At this time, the support bar 34 is supported by the connection member 35 at a position away from the connection shaft 22 on the side opposite to the base end portion 21 (left side in FIG. 3), and the support bar 34 has a longitudinal direction with respect to the vertical direction. It is drooped in a tilted state. Accordingly, the main body 33 has one surface side directed toward the base end portion 21 with respect to the vertical direction, and the other surface side directed toward the side opposite to the base end portion 21 with respect to the vertical direction. That is, the surface in contact with the workpiece Wa (see FIG. 1) is directed to the base end portion 21 (lower right side in FIG. 3) with respect to the vertical direction.

  The protruding portion 36 is a portion that protrudes in a direction intersecting the longitudinal direction of the support rod 34 from a portion of the support rod 34 that is located in the vicinity of the main body 33, and is rotatably supported at the tip of the protruding portion 36. A roller 36a is provided. In a state where the measuring device 30 is supported by the rotary arm 20, the protruding portion 36 protrudes from the support rod 34 side toward the rotary arm 20 side.

(3. Displacement of measuring device 30)
Returning to FIG. 1, the description will be continued. In FIG. 1, the grinding wheel 15 is in contact with the outer peripheral surface of the work piece Wa located at the highest position in a state where the measuring device 30 is made to stand by in the vicinity of the work piece Wa (hereinafter referred to as “standby state”). The state is shown.

  In the standby state, a control device (not shown) adjusts the rotation angle of the rotary arm 20 about the first axis A1, and maintains a non-contact state between the pair of guides 31 and the probe 32 and the workpiece Wa. The measuring device 30 is arranged in At this time, the rotation arm 20 is restricted from rotating around the first axis A1.

  Whereas the measuring device 30 is displaced around the first axis A1 based on the rotation of the rotary arm 20, the nozzle 17 is disposed on the displacement locus of the measuring device 30, and in the measuring device 30, the roller 36a rotates in the standby state. Supported by the moving surface 17a. Thereby, the wobbling of the measuring device 30 during standby can be suppressed, and the non-contact state between the measuring device 30 and the grinding wheel 15 can be maintained.

  Next, with reference to FIGS. 4 to 6, the displacement of the rotary arm 20 and the measuring device 30 when measuring the outer diameter of the workpiece Wa will be described. 4 to 6, only the main part of the grinding machine 1 is illustrated, and the grindstone cover 16 is viewed in cross section.

  As shown in FIG. 4, in the grinding machine 1, when the workpiece Wa that revolves while being in contact with the grinding wheel 15 is disposed at the uppermost position, the workpiece Wa is displaced around the first axis A <b> 1. It is comprised so that it may arrange | position on the locus | trajectory which the front end surface of is displaced.

  When the rotation restriction on the support shaft 14a of the rotary arm 20 is released from the standby state shown in FIG. 1, the measuring device 30 is lowered by its own weight. Accordingly, the roller 36a moves away from the rolling surface 17a, the rotary arm 20 rotates so as to displace the second axis A2 downward (counterclockwise in FIG. 1), and the measuring device 30 moves to the first axis A1. And turn around the second axis A2. Thereby, the front end surfaces of the pair of guides 31 can be brought into contact with the workpiece Wa positioned at the uppermost position, and the outer diameter of the workpiece Wa can be measured by the probe 32.

  The measuring device 30 is suspended from the rotating arm 20 with the distal ends of the pair of guides 31 and the tracing stylus 32 directed toward the base end portion 21, so that the pair of guides 31 is moved to the grinding wheel with respect to the workpiece Wa. 15 can be contacted from the opposite side (left side in FIG. 4). Thereby, interference with the measuring device 30 and the grinding wheel 15 can be prevented.

  As shown in FIG. 5, when measuring the outer diameter of the workpiece Wa, the revolution of the workpiece Wa and the grinding of the workpiece Wa by the grinding wheel 15 are continued. Since the grinding wheel 15 reciprocates in the X-axis direction in accordance with the revolution of the workpiece Wa, the distance between the first axis A1 that is the rotation center of the grinding wheel 15 and the workpiece Wa is maintained to some extent. Further, since the rotary arm 20 is supported by the same support shaft 14a as the grinding wheel 15, while the workpiece Wa revolves, the first reciprocating movement in the X-axis direction according to the revolution of the workpiece Wa is performed. Rotate around axis A1. Accordingly, the measuring device 30 supported by the rotary arm 20 is also displaced around the first axis A1 while reciprocating in the X-axis direction according to the revolution of the workpiece Wa.

  Therefore, while the workpiece Wa is revolving, the distance between the pair of guides 31 and the workpiece Wa is maintained to some extent, and the state where the pair of guides 31 and the measuring element 32 are in contact with the workpiece Wa can be maintained.

  As described above, the pair of guides 31 and the probe 32 can be brought into contact with the workpiece Wa without performing advanced control of the rotary arm 20 (arm rotary motor) by a control device (not shown). The contact state between the pair of guides 31 and the probe 32 and the workpiece Wa can be maintained. Therefore, it is possible to reduce the load on the control device when measuring the outer diameter of the workpiece Wa.

  Here, as the grinding of the workpiece Wa by the grinding wheel 15 proceeds, the outer diameters of the workpiece Wa and the grinding wheel 15 become smaller. Accordingly, the distance between the first axis A1 and the workpiece Wa is adjusted by the control device, and the contact state between the grinding wheel 15 and the workpiece Wa is maintained.

  In the control device, the distance between the first axis A1 and the pair of guides 31 may be finely adjusted through the rotation of the rotary arm 20 around the first axis A1 and the rotation of the measuring device 30 around the second axis A2. Is possible. Since the measuring device 30 can freely rotate with respect to the first axis A1 and the second axis A2 based on its own weight and the like, the measuring device 30 can be used even after the distance between the first axis A1 and the workpiece Wa is changed. The contact state between the pair of guides 31 and the probe 32 and the workpiece Wa can be maintained by the weight of 30 or the like.

  The control device separates the grinding wheel 15 from the workpiece Wa when it is determined that the outer diameter of the workpiece Wa has reached a desired dimension based on the measurement result by the measuring device 30. Further, the control device rotates the rotary arm 20 so as to displace the second axis A2 upward (clockwise in FIG. 4) to separate the pair of guides 31 and the measuring element 32 from the workpiece Wa, thereby measuring the measuring device. 30 is returned to the standby position shown in FIG.

  As described above, in the grinding machine 1, when the outer diameter of the workpiece Wa is measured by the measuring device 30, the rotating arm 20 is moved around the first axis A1 while using the weight of the measuring device 30, and the measuring device 30 is moved to the first position. The pair of guides 31 can be brought into contact with the workpiece Wa by rotating around the two axes A2. In the grinding machine 1, when the measuring device 30 is separated from the workpiece Wa, the rotating arm 20 is rotationally driven to displace the measuring device 30 to a position where the protruding portion 36 contacts the nozzle 17 (standby state). The non-contact state between the measuring device 30 and the grinding wheel 15 is maintained.

  The grinding machine 1 rotates the rotary arm 20 so as to displace the second axis A2 upward, and after the pair of guides 31 and the probe 32 are separated from the workpiece Wa, the roller 36a of the measuring device 30 is a nozzle. It is comprised so that it may contact | abut to 17 rolling surfaces 17a. That is, the nozzle 17 is in a non-contact state with the measuring device 30 when the measuring device 30 contacts the workpiece Wa. Therefore, when the measuring device 30 measures the outer diameter of the workpiece Wa, the measuring device 30. And the nozzle 17 can be avoided, and the displacement of the measuring device 30 can be prevented from being obstructed by the nozzle 17.

  Next, with reference to FIG. 6, the case where the measuring device 30 is further displaced upward from the standby state will be described. If the measuring device 30 is below the tip of the nozzle 17, it may hinder the dressing operation of the grinding wheel 15 and the loading / unloading operation of the crankshaft W. In contrast, by disposing the measuring device 30 at least above the tip of the nozzle 17, the dressing operation of the grinding wheel 15 and the loading / unloading operation of the crankshaft W can be performed efficiently.

  As shown in FIG. 6, when the rotary arm 20 is rotated (clockwise in FIG. 1) so that the second axis A2 is further retracted upward from the standby state shown in FIG. While the displacement in the axial direction is restricted by the rolling surface 17a, the roller 36a rolls upward on the rolling surface 17a. Since the distance between the rolling surface 17a and the first axis A1 increases toward the upper side, the distance between the roller 36a that rolls on the rolling surface 17a and the first axis A1 increases as the rotating arm 20 rotates. Accordingly, the connecting member 35 rotates around the second axis A2 (clockwise direction shown in FIG. 6), and the main body 33 is displaced in a direction away from the rotary arm 20.

  Therefore, as compared with the case where the measuring device 30 is displaced around the first axis A1 without the displacement in the X-axis direction being regulated by the nozzle 17, the measuring device 30 is efficiently displaced upward with respect to the rotation amount of the rotary arm 20. Can be made. As a result, the measuring device 30 can be displaced in a short time above the tip of the nozzle 17.

  As described above, when the measuring device 30 is displaced upward from the standby state, the grinding machine 1 rotates the rotary arm 20 to guide the protruding portion 36 of the measuring device 30 along the rolling surface 17 a of the nozzle 17. By doing so, the measuring device 30 can be efficiently displaced upward while rotating the measuring device 30 about the second axis A2.

  In the present embodiment, when the measuring device 30 is displaced to the state shown in FIG. 6, further rotation (rotation angle) of the rotating arm 20 that attempts to displace the second axis A2 upward is restricted. It is configured as follows. Thereby, it can prevent that parts other than the roller 36a among the measuring devices 30 interfere with the nozzle 17. FIG.

  Further, the roller 36a is provided in the protrusion 36, and the roller 36a is configured to be able to roll on the rolling surface 17a. Therefore, the protrusion 36 generated when the measuring device 30 is displaced upward from the standby state; Friction with the rolling surface 17a can be reduced. Therefore, the driving force required to rotate the rotary arm 20 can be reduced.

  When the grinding machine 1 displaces the measuring device 30 upward from the standby state, the rotating arm 20 is rotationally driven to guide the protruding portion 36 of the measuring device 30 along the rolling surface 17a of the nozzle 17, The measuring device 30 can be efficiently displaced upward while rotating the measuring device 30 about the second axis A2.

  As described above, in the grinding machine 1, the measurement device 30 can be displaced through the rotation of the rotary arm 20 to switch between the contact state and the non-contact state of the measurement device 30 and the workpiece Wa. That is, it is not necessary to provide a mechanism for independently rotating the measuring device 30 around the second axis A2 apart from a mechanism for rotating the rotating arm 20, so that the structure for displacing the measuring device 30 is simplified. it can. In addition, a driving source for rotating the measuring device 30 about the second axis A2 is not required separately from an arm rotating motor (not shown) that rotates the rotating arm 20, so that the number of parts and the control device ( The control load due to (not shown) can be reduced, and as a result, the manufacturing cost of the grinding machine 1 can be suppressed.

(4. Effect)
The grinding machine 1 supports a spindle base 12 that rotatably supports a shaft-shaped workpiece Wa, a grinding wheel base 14 that moves relative to the spindle base 12, and a grinding wheel base 14 that is rotatably supported around the first axis A1. The grinding wheel 15 for grinding the workpiece Wa, the rotary arm 20 provided on the grinding wheel base 14 and driven to rotate about the first axis A1 on the base end side, and the first axis A1 with respect to the distal end side of the rotary arm 20 A measuring device 30 that can be rotated about a second axis A2 parallel to the main shaft 12 and that is capable of measuring the outer diameter of the workpiece Wa by contacting the workpiece Wa supported by the headstock 12, and the grindstone table 14. When the measuring device 30 moves away from the workpiece Wa due to the rotation of the rotary arm 20 such that the second axis A2 is displaced upward, the non-contact state between the measuring device 30 and the grinding wheel 15 is maintained. Rolling surface as a guide for guiding the measuring device 30 Equipped with a 7a.

  According to the grinding machine 1, the rotary arm 20 is supported so as to be rotatable around the first axis A1, and the measuring device 30 is suspended from the rotary arm 20. Therefore, the rotary arm 20 rotates around the first axis A1. When driven, the measuring device 30 is displaced about the first axis A1. When the rotating arm 20 is rotated so that the second axis A2 is displaced upward and the measuring device 30 is moved away from the workpiece, the measuring device 30 is guided to the rolling surface 17a as a guide portion, and the grinding wheel 15 An inaccessible state is maintained.

  Thus, the grinding machine 1 can maintain the non-contact state between the measuring device 30 and the workpiece Wa without rotating the measuring device 30 independently of the rotary arm 20. Therefore, the structure for displacing the measuring device 30 can be simplified, and the number of parts can be reduced. As a result, the manufacturing cost of the grinding machine 1 can be suppressed.

  Further, the grinding machine 1 includes a nozzle 17 that supplies coolant to a grinding position by the grinding wheel 15, and the nozzle 17 also serves as a guide unit that guides the measuring device 30. Thereby, compared with the case where a guidance part is provided additionally, a number of parts can be reduced.

  Further, the nozzle 17 as the guide portion is in a non-contact state with the measuring device 30 when the measuring device 30 comes into contact with the workpiece Wa. Thereby, it is possible to prevent the nozzle 17 from inhibiting the displacement of the measuring device 30 around the first axis A1 when measuring the outer diameter of the workpiece Wa.

  Further, when the measuring device 30 is separated from the nozzle 17 serving as the guide portion, the measuring device 30 rotates around the second axis A1 due to its own weight and moves to the measurement position with respect to the workpiece Wa. Thereby, the measurement apparatus 30 can be moved to the measurement position with respect to the workpiece Wa, without performing advanced control by the control apparatus.

  Furthermore, the grinding machine 1 includes a protruding portion 36 that protrudes from the measuring device 30 toward the nozzle 17 serving as a guide portion, and the measuring device 30 moves while the protruding portion 36 contacts the nozzle 17 serving as a guide portion. As a result, the nozzle 17 is guided as a guide portion while maintaining a non-contact state with the grinding wheel 15. Thereby, since interference with measuring device 30 (main part 33) and nozzle 17 can be prevented, damage to measuring device 30 (a pair of guides 31 and measuring element 32) can be controlled.

  Furthermore, the protrusion part 36 is provided with the roller 36a which can roll the nozzle 17 (rolling surface 17a) as a guide part. Thereby, the protrusion 36 can be smoothly guided along the nozzle (rolling surface 17a) serving as a guide while suppressing the friction between the protrusion 36 and the nozzle 17. Further, the rotational driving force of the rotating arm 20 (the driving force of the arm rotating motor) required when the measuring device 30 is guided to the nozzle 17 can be reduced.

(5. Modifications)
In the above embodiment, a case has been described in which the rolling surface 17a is provided in the nozzle 17 and the nozzle 17 is also used as a function of guiding the protrusion 36. However, the present invention is not limited to this, and the grinding portion of the grinding wheel 15 is not necessarily limited to this. The grindstone cover 16 may be extended to the upper part, and the rolling surface 17 a may be formed on the grindstone cover 16 instead of the nozzle 17. In this case, since the grindstone cover 16 can also be used for the function of guiding the protruding portion 36, the number of parts can be reduced as compared with the case where a member for guiding the protruding portion 36 is additionally provided.

  In the said embodiment, although the case where the rolling surface 17a was formed in the flat surface shape extended along the perpendicular direction was demonstrated, it is not necessarily restricted to this, and the rolling surface 17a is the vertical direction. The shape may be inclined or curved.

  In the above embodiment, the grinding wheel traverse type grinding machine 1 has been described as an example of the grinding machine according to the present invention, but the present invention may be applied to a table traverse type grinding machine.

DESCRIPTION OF SYMBOLS 1: Grinding machine 12: Spindle head, 14: Grinding wheel base, 15: Grinding wheel, 17: Nozzle (guide part), 20: Rotating arm, 30: Measuring device, 36: Protruding part, 36a: Roller, A1: No. 1 axis, A2: 2nd axis, Wa: Workpiece

Claims (6)

A headstock for rotatably supporting a shaft-shaped workpiece;
A grinding wheel platform that moves relative to the headstock;
A grinding wheel that is supported by the grinding wheel platform so as to be rotatable about a first axis, and grinds the workpiece;
A rotating arm that is provided on the grindstone platform and whose proximal end is driven to rotate about the first axis;
The rotary arm is suspended so as to be relatively rotatable about a second axis parallel to the first axis with respect to the distal end side of the rotating arm, and the outer diameter of the workpiece is reduced by contacting the workpiece supported by the headstock. A measuring device capable of measuring,
A non-contact state between the measuring device and the grinding wheel when the measuring device is separated from the workpiece by the rotation of the rotating arm provided on the grinding wheel table so that the second shaft is displaced upward. A guide unit for guiding the measurement device while maintaining
A nozzle for supplying coolant to a grinding position by the grinding wheel;
Equipped with a,
The nozzle is a grinding machine that also serves as the guide portion .   A headstock for rotatably supporting a shaft-shaped workpiece;
  A grinding wheel platform that moves relative to the headstock;
  A grinding wheel that is supported by the grinding wheel platform so as to be rotatable about a first axis, and grinds the workpiece;
  A rotating arm that is provided on the grindstone platform and whose proximal end is driven to rotate about the first axis;
  The rotary arm is suspended so as to be relatively rotatable about a second axis parallel to the first axis with respect to the distal end side of the rotating arm, and the outer diameter of the workpiece is reduced by contacting the workpiece supported by the headstock. A measuring device capable of measuring,
  A non-contact state between the measuring device and the grinding wheel when the measuring device is separated from the workpiece by the rotation of the rotating arm provided on the grinding wheel table so that the second shaft is displaced upward. A guide unit for guiding the measurement device while maintaining
  A grinding wheel cover provided on the grinding wheel platform and covering a part of the grinding wheel;
  With
  The grindstone cover is a grinding machine that also serves as the guide portion.   The grinding machine according to claim 1, wherein the guide unit is in a non-contact state with the measurement device when the measurement device is in contact with the workpiece.   4. The measurement device according to claim 1, wherein when the measurement device is separated from the guide unit, the measurement device rotates around the second axis by its own weight and moves to a measurement position with respect to the workpiece. Grinder. The grinding machine includes a protruding portion that protrudes from the measuring device toward the guide portion side,
5. The measuring device is guided to the guide unit while maintaining a non-contact state with the grinding wheel by moving the protrusion while contacting the guide unit. 6. Grinding machine according to item.   The grinding machine according to claim 5, wherein the protruding portion includes a roller capable of rolling the guide portion.

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