WO2017030049A1

WO2017030049A1 - Grinder and grinding method

Info

Publication number: WO2017030049A1
Application number: PCT/JP2016/073450
Authority: WO
Inventors: 一郎岩坂; 裕介内田; 俊男光畑
Original assignee: コマツＮｔｃ株式会社
Priority date: 2015-08-18
Filing date: 2016-08-09
Publication date: 2017-02-23
Also published as: JP2017039177A

Abstract

The present invention manufactures long cylindrical members with a high degree of coaxiality with the shaft center over the entire length thereof and also a high degree of roundness of the outer circumferential surface. A grinder (1), which is provided with an adjustment wheel (10), a blade (20), and a cylindrical grinding stone (30), and which grinds a cylindrical workpiece (2) inserted between the grinding stone (30) and the adjustment wheel (10) while rotationally supporting the workpiece (2) with the adjustment wheel (10) and the blade (20), is characterized in also being provided with a support device (40) for rotatably supporting the two ends of the workpiece, and in the support device (40) comprising a pair of support members (41), (41) for coaxially supporting the rotation centers of the two ends of the workpiece (2).

Description

Grinding machine and grinding method

The present invention relates to a grinding machine and a grinding method for sandwiching and grinding a workpiece between a grinding wheel and an adjustment wheel while rotating and supporting the workpiece with a support device.

As a device that forms the cylindrical shaft by grinding the outer peripheral surface of the workpiece, the workpiece is sandwiched between the grinding wheel and the adjustment wheel while the workpiece is rotated and supported by the adjustment wheel and blade. There have been grinders (see, for example, Patent Document 1) and grinders (see, for example, Patent Documents 2 and 3) that grind the outer peripheral surface of a work while rotating the work between a tailstock and a spindle.

Japanese Patent Laid-Open No. 2005-028521 JP 2007-283416 A JP 2004-249438 A

In recent years, there is a demand for a cylindrical member that is long and has a high degree of concentricity with respect to the axial center over the entire length and a high roundness of the outer peripheral surface. On the other hand, in a centerless grinding machine, the workpiece is ground while being rotated only with the outer peripheral surface, so that the roundness of the outer peripheral surface can be secured, but the rotation center moves. I can not get the axis to go. On the other hand, in a normal grinding machine, grinding is performed while rotating the work between the tailstock and the main spindle, so that the center of rotation (axial center) can be secured. However, the tailstock and the main spindle have a rotation mechanism. Therefore, it has been difficult to align the shafts of the tailstock and the main shaft coaxially. For this reason, at the both ends of the work, the center of rotation may shift and not be coaxial.

Therefore, the present invention has been devised to solve the above-described problem, and is a cylindrical member that is long and has a high degree of coaxiality with respect to the axial center over the entire length and a high roundness of the outer peripheral surface. It is an object of the present invention to provide a grinding machine and a grinding method capable of manufacturing the same.

The invention according to claim 1 for solving the above-mentioned problems includes an adjusting wheel, a blade, and a cylindrical grinding wheel, and the grinding wheel while rotating and supporting a columnar workpiece by the adjusting wheel and the blade. And a grinding machine that sandwiches and grinds the workpiece with the adjusting wheel, and further includes a support device that rotatably supports both end portions of the workpiece, and the support device is coaxial with the rotation centers at both ends of the workpiece. It is a grinder characterized by having a pair of support members that support in a state.

According to such a configuration, the work is rotatably supported by the adjusting wheel and the blade, and is sandwiched and ground between the grinding wheel and the adjusting wheel, so that the roundness of the outer peripheral surface can be increased. Furthermore, since the grinding is performed in a state where the rotation centers at both ends of the workpiece are supported coaxially by the support device, one rotation center passes through the entire length of the workpiece. Thereby, the coaxiality of the workpiece with respect to the rotation center can be increased. In addition, since it is not necessary for the support device to rotate the workpiece, a high degree of coaxiality between the pair of support members can be easily ensured. Moreover, since the workpiece | work according to the axial direction length of an adjustment wheel and a grinding wheel can be processed, a long product can be manufactured.

In the grinding machine according to the present invention, during grinding, the distance from the contact point of the adjustment wheel and the workpiece to the rotation center of the workpiece, the distance from the contact point of the blade and the workpiece to the rotation center of the workpiece, A synchronization mechanism that relatively moves the adjusting wheel, the blade, the grindstone, and the support member so that the distance from the grinding wheel and the contact point of the work to the rotation center of the work is the same. Is preferred.

According to the above-described configuration, while the rotation center at both ends of the workpiece is supported by the support member, the workpiece can be ground by the grinding wheel while rotating the workpiece by the adjusting wheel, and the contact between each member and the workpiece and the rotation center can be obtained. Since the distance is constant, the roundness of the outer peripheral surface of the workpiece and the coaxiality with respect to the rotation center can be further increased.

In the grinding machine according to the present invention, the axial center position of the support member is fixed, and the synchronization mechanism applies a predetermined pressing force to the adjustment wheel to move the adjustment wheel to the workpiece side. Adjusting wheel moving means, blade moving means for applying a predetermined pressing force to the blade and moving the blade to the workpiece side, and applying a predetermined pressing force to the grinding wheel to attach the grinding wheel to the workpiece What is provided with the grinding wheel moving means moved to the side is preferable.

The above configuration shows an example of a synchronization mechanism. As a means for moving the adjusting wheel, the blade, and the grinding wheel, a known mechanism such as a ball screw or a cylinder may be used as long as the pressing force can be held at a predetermined value within the range of the grinding length of the workpiece. By fixing the supporting member as in the above configuration and holding the pressing force of each member at a predetermined value, the roundness of the outer peripheral surface of the workpiece and the coaxiality with respect to the rotation center can be increased.

Furthermore, in the grinding machine according to the present invention, the axial center position of the support device is fixed, and the synchronization mechanism includes a measuring device that measures the outer diameter of the workpiece, What adjusts the said adjustment wheel and the said blade synchronously according to an outer diameter is preferable.

The above configuration shows an example of a synchronization mechanism. The moving distance of the adjusting wheel, the blade, and the grinding wheel is appropriately calculated according to the angle formed by the moving direction of each member and the radial direction connecting the contact point of each member and the workpiece and the rotation center. Since the support member is fixed as in the above configuration and the adjusting wheel and the blade are moved synchronously according to the measured outer diameter of the workpiece, the workpiece can be held with an appropriate pressing force, so that the outer peripheral surface of the workpiece The degree of roundness and the degree of coaxiality with respect to the center of rotation can be increased.

The invention according to claim 5 for solving the above-described problem is to support the rotation centers of both ends of the cylindrical workpiece so as to be rotatable in a coaxial state, and to grind while rotating and supporting the workpiece with an adjusting wheel and a blade. It is a grinding method characterized by sandwiching and grinding the work between a grindstone and the adjusting wheel.

According to such a method, since the workpiece is sandwiched and ground between the grinding wheel and the adjusting wheel while being rotated and supported by the adjusting wheel and the blade, the roundness of the outer peripheral surface can be increased. Furthermore, since grinding is performed in a state where the rotation centers at both ends of the workpiece are supported coaxially, a single rotation center passes through the entire length of the workpiece. Thereby, the coaxiality with respect to the shaft center can be increased. Moreover, since the workpiece | work according to the axial direction length of an adjustment wheel and a grinding wheel can be processed, a long product can be manufactured.

According to the present invention, it is possible to manufacture a cylindrical member that is long and has a high degree of coaxiality with respect to the axial center over the entire length and a high roundness of the outer peripheral surface.

It is the schematic side view which showed the grinding machine which concerns on embodiment of this invention. (A) is the schematic plan view which showed the grinding machine which concerns on embodiment of this invention, (b) is the elements on larger scale. It is a perspective view showing the positional relationship of the workpiece of the grinding machine, the adjustment wheel, the blade, the grinding wheel and the support device of the embodiment of the present invention, (A) The figure which showed the grinding initial state of the schematic sectional drawing which showed the positional relationship of the workpiece | work which is grinding using the grinder which concerns on embodiment of this invention, an adjustment wheel, a blade, and a grinding wheel, (b) FIG. 4 is a diagram showing a final grinding state.

DETAILED DESCRIPTION A grinding machine and a grinding method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. First, the configuration of the grinding machine 1 will be described.

As shown in FIGS. 1 to 3, the grinding machine 1 includes an adjusting wheel 10, a blade 20, a grinding wheel 30, and a support device 40. In the present embodiment, the support device 40 that supports the workpiece 2 is fixed, and the workpiece 2 rotates at the same axial position. The adjusting wheel 10, the blade 20, and the grinding wheel 30 move so as to approach and separate from the workpiece 2.

The adjusting wheel 10 has a cylindrical shape and is arranged so that the rotating shaft 11 extends in the horizontal direction. The adjusting wheel 10 is rotatably supported by an adjusting wheel frame 12 provided on the bed 3. A motor 15 (see FIG. 2) for rotating the adjustment wheel 10 is connected to the rotating shaft 11 via a rotational force transmitting means such as a belt 16 (see FIG. 2). The adjusting wheel frame 12 is provided with adjusting wheel moving means 14 for moving the adjusting wheel frame 12 forward and backward (to approach and move away from the rotation center of the work 2). The adjustment vehicle moving means 14 moves the adjustment vehicle 10 by moving the adjustment vehicle frame 12 forward and backward.

The adjustment vehicle frame 12 is installed on the slide table 4 disposed on the bed 3 via a static pressure guide mechanism 13 (see FIG. 1) having a static pressure guide (not shown). The static pressure guide extends in a horizontal direction orthogonal to the rotating shaft 11 of the adjustment wheel 10, and the adjustment wheel frame 12 can move forward and backward so that it can approach and separate from the workpiece 2 and the grinding wheel 30. Yes. The adjustment vehicle moving unit 14 includes a drive unit that moves the adjustment vehicle frame 12 and a guide unit that guides the movement. In the present embodiment, the static pressure guide mechanism 13 constitutes a guide means. The guide means is not limited to the static pressure guide mechanism 13 and may be of other configuration such as a link mechanism. The drive means of the adjustment wheel moving means 14 moves the adjustment wheel 10 along the static pressure guide. The drive means includes, for example, a feed motor and a ball screw (not shown), and moves the adjustment vehicle frame 12 by rotating the ball screw with the feed motor. The amount of movement of the adjustment vehicle 10 is managed by torque control. In addition, the moving mechanism of the adjustment vehicle moving means 14 is not limited to the said structure, Other movement mechanisms, such as a cylinder, a spring, and a linear motor, may be sufficient.

The grinding wheel 30 has a cylindrical shape and is disposed on the side of the adjustment wheel 10. The grinding wheel 30 is arranged so that the rotation shaft 31 of the grinding wheel 30 is parallel to the rotation shaft 11 of the adjustment wheel 10. The center height position of the rotating shaft 31 of the grinding wheel 30 is the same as the center height position of the rotating shaft 11 of the adjusting wheel 10. The grinding wheel 30 is rotatably supported by a grinding wheel frame 32 provided on the bed 3. A grindstone motor 35 (see FIG. 2) for rotating the grinding grindstone 30 is connected to the rotating shaft 31 via a rotational force transmitting means such as a belt 36 (see FIG. 2). The grinding wheel frame 32 is provided with a grinding wheel moving means 34 for moving the grinding wheel frame 32 forward and backward (to move closer to and away from the rotation center of the workpiece 2). The grinding wheel moving means 34 moves the grinding wheel 30 by moving the grinding wheel frame 32 back and forth.

The grinding wheel frame 32 is installed on the slide table 4 disposed on the bed 3 via a linear guide mechanism 33 having a linear guide (not shown). The linear guide extends in a horizontal direction perpendicular to the rotating shaft 11 of the adjusting wheel 10, and the grinding wheel frame 32 can be moved forward and backward so as to be able to approach and separate from the workpiece 2 and the grinding wheel 30. . The grinding wheel moving means 34 includes driving means for moving the grinding wheel frame 32 and guide means for guiding the movement. In the present embodiment, the linear guide mechanism 33 constitutes a guide means. The guide means is not limited to the linear guide mechanism 33, and may have other configurations such as a link mechanism. The driving means of the grinding wheel moving means 34 includes, for example, a feed motor and a ball screw, and the grinding wheel frame 32 is moved by rotating the ball screw with the feed motor. The amount of movement of the grinding wheel 30 is managed by torque control. Note that the moving mechanism of the grinding wheel moving means 34 is not limited to the above-described configuration, and may be another moving mechanism such as a cylinder, a spring, or a linear motor.

The blade 20 supports the workpiece 2 from below. It arrange | positions under the arrangement | positioning space of the workpiece | work 2 between the adjustment wheel 10 and the grinding wheel 30. FIG. The upper surface of the blade 20 is inclined so that the grinding wheel 30 side becomes higher. The blade 20 is fixed to a blade frame 21 provided on the bed 3 so as to be movable up and down. The blade frame 21 is provided with blade moving means 23 for moving the blade 20 up and down. The blade moving means 23 includes, for example, a hydraulic cylinder, and moves the blade 20 by expansion and contraction of the hydraulic cylinder. The amount of movement of the blade 20 is managed by NC torque control.

As described above, the adjusting wheel 10, the blade 20, and the grinding wheel 30 have the same arrangement relationship as that of a general centerless grinding machine. In this embodiment, the blade 20 and the grinding wheel 30 in addition to the adjusting wheel 10 can be moved, which is different from a general centerless grinding machine. In addition, a general centerless grinding machine does not support a workpiece. In this embodiment, however, a support device 40 that rotatably supports both axial ends of the workpiece 2 is provided. Further, in a general centerless grinder, the adjustment wheel and the workpiece move during grinding. In this embodiment, the workpiece 2 is fixed, and the adjustment wheel 10, the blade 20, and the grinding wheel 30. Move relative to the workpiece 2.

2 and 3, the support device 40 has a pair of

support members

41 and 41 that support the rotation centers at both ends of the work 2 in a coaxial state. The support member 41 has a conical shape with a pointed center. The tip of the cone of the support member 41 is inserted into the recess 2 a formed at the end of the work 2. The concave portion 2 a of the workpiece 2 has a circular cross section, and the center of the circle coincides with the axis of the workpiece 2. The opening peripheral edge 2b of the recess 2a is in contact with a conical outer peripheral surface 42 (see FIG. 2B), and is in sliding contact with the conical outer peripheral surface 42 when the workpiece 2 is processed.

The pair of

support members

41 and 41 are arranged so that their axial centers (cone centers) coincide with each other. The support member 41 is fixed to a pair of

support pillars

44, 44 erected on both ends of the base portion 43. The base portion 43 extends along the axial length direction of the workpiece 2 and is laid on the bed 3. The pair of

support pillars

44 and 44 are fixed to both ends of the base portion and face each other. A support member 41 is fixed to the surfaces of the

support columns

44, 44 facing each other. One support column 44 is erected so as to be movable along the axial length direction of the workpiece 2. The other support column 44 is erected so as not to move. When the work 2 is mounted between the

support members

41, 41, one support member 41 is moved away from the other support member 41, the work 2 is set therebetween, and the one support member 41 is returned to its original position. return. As a result, the tip of the cone of the support member 41 is inserted into the recess 2 a of the workpiece 2. At this time, since the opening peripheral edge 2b of the recess 2a abuts on the outer circumferential surface 42 of the cone, the axial position of the workpiece 2 and the axial positions of the

support members

41 and 41 are aligned.

The grinding machine 1 further includes a synchronization mechanism that relatively moves the adjustment wheel 10, the blade 20, the grinding wheel 30, and the

support members

41 and 41. In the present embodiment, the synchronization mechanism moves the adjustment wheel 10, the blade 20, and the grinding wheel 30. The synchronizing mechanism includes an adjustment wheel moving means 14, a blade moving means 23, a grinding wheel moving means 34, and a control means (not shown) electrically connected to these moving

means

14, 23, 34. ing.

As shown in FIG. 4, the support member 41 is fixed, and the adjustment wheel 10, the blade 20, and the grinding wheel 30 move toward the rotation center of the workpiece 2 as the grinding progresses. The synchronization mechanism includes a distance (first diameter dimension) L1 from the contact point between the adjustment wheel 10 and the workpiece 2 to the rotation center P of the workpiece 2, and a distance (first dimension) from the contact point between the blade 20 and the workpiece 2 to the rotation center P of the workpiece 2. Each part is moved so that the (diameter dimension) L2 and the distance (third diameter dimension) L3 from the contact point between the grinding wheel 30 and the workpiece 2 to the rotation center P of the workpiece are the same. The peripheral speed of the adjusting wheel 10 is set slower than the peripheral speed of the grinding wheel 30.

The control device applies a predetermined constant pressing force to the adjustment vehicle 10 to move the adjustment vehicle 10 toward the workpiece 2 by making the current sent to the feed motor of the adjustment vehicle moving means 14 constant. Further, the control device applies a predetermined constant pressing force to the blade 20 to move the blade 20 toward the workpiece 2 by making the expansion / contraction torque of the hydraulic cylinder of the blade moving means 23 constant. The control of the pressing force of the adjusting wheel 10 and the blade 20 is not limited to the above method, and a pressing force detecting device for detecting the pressing force of the adjusting wheel 10 and the blade 20 is provided. While detecting the pressing force, the output may be adjusted so as to keep each pressing force constant. Each predetermined pressing force is a numerical value that allows the adjusting wheel 10 and the blade 20 to grind while pressing the work 2 in a well-balanced manner.

The grinding wheel 30 is fed (moved) by the grinding amount in accordance with the processing dimensions of the workpiece 2. Thereby, the grinding wheel 30 grinds the workpiece 2 by a desired thickness. That is, when grinding is performed using the grinding machine 1, the workpiece 2 is pressed and rotated by the adjusting wheel 10 while being rotatably supported by the blade 20 from below. At this time, the rotation center of both ends of the work 2 is supported by the

support members

41 and 41, and the axial center position is fixed. In this state, when the grinding wheel 30 is fed by the grinding amount in accordance with the processing dimension, the workpiece 2 is ground and reduced in diameter. In response to this, the adjusting wheel 10 and the blade 20 move to the axial center side. At this time, the adjusting wheel 10 and the blade 20 are pressed against the workpiece 2 with a predetermined pressing force, respectively. In this way, the grinding wheel 30 is fed to grind the workpiece 2 while the adjusting wheel 10 and the blade 20 rotate and support the workpiece 2 with a predetermined pressing force, so that the first to third diameter dimensions L1, L1 of the workpiece 2 are obtained. L2 and L3 (see FIG. 4) are the same. As shown in FIG. 4B, as the grinding progresses, the first to third diameter dimensions L1, L2, and L3 gradually decrease while maintaining the same length. 4A and 4B, the rotation center P of the workpiece 2 is fixed and at the same position.

When grinding is performed using the grinding machine 1 having the above-described configuration, the rotation centers of both ends of the workpiece 2 are supported by the

support members

41 and 41 so as to be rotatable coaxially, and the workpiece is adjusted by the adjusting wheel 10 and the blade 20. While rotating 2, the workpiece 2 is sandwiched between the grinding wheel 30 and the adjustment wheel 10 for grinding. In the present embodiment, the support device 40 that supports the workpiece 2 is fixed, and the workpiece 2 rotates at the same axial position. The adjusting wheel 10, the blade 20, and the grinding wheel 30 move so as to approach the rotation center of the workpiece 2 in accordance with the grinding of the workpiece 2.

According to the grinding machine 1 and the grinding method, the workpiece 2 is sandwiched between the grinding wheel 30 and the adjusting wheel 10 and ground while being rotated and supported by the adjusting wheel 10 and the blade 20. The circularity can be increased. Moreover, since the workpiece | work 2 according to the axial direction length of the adjustment wheel 10 and the grinding wheel 30 can be processed, a long product can be manufactured. Furthermore, since the adjusting wheel 10, the blade 20, and the grinding wheel 30 press the workpiece 2 in a well-balanced manner, excessive bending stress does not act on the workpiece 2, and the occurrence of distortion can be prevented.

Furthermore, since the grinding is performed with the

support members

41 and 41 supporting the rotational centers at both ends of the workpiece 2 in a coaxial state, one rotational center passes through the entire length of the workpiece 2. Thereby, the coaxiality with respect to the axial center of the workpiece 2 can be increased. Since the support device 40 does not need to rotate the workpiece 2, the pair of

support members

41 and 41 can be easily arranged with high coaxiality.

In the above-described embodiment, the grinding wheel 30 is appropriately sent according to the grinding amount of the workpiece 2 to grind the workpiece 2, and the pressing force for moving the adjustment wheel 10 and the pressing force for moving the blade 20 are fixed to each other. The distances L1, L2, and L3 between the adjusting wheel 10, the blade 20, and the grinding wheel 30 and the rotation center of the workpiece 2 are made the same by controlling the values to be the same values. The method of controlling the movement of 30 is not limited to this embodiment.

As another embodiment, the outer diameter of the workpiece 2 can be measured, and the movement amounts of the adjusting wheel 10, the blade 20, and the grinding wheel 30 can be designated by distances and moved synchronously according to the measured values. In this case, a measuring device for measuring the outer diameter of the workpiece 2 is further provided as a synchronization mechanism. As the measuring device, a sizing gauge capable of measuring the outer diameter across the outer peripheral surface of the rotating workpiece 2 is used. The sizing gauge is disposed at both ends of the work 2. The grinding amount (length) is measured by the measuring device. Based on the amount of grinding by the control device, the moving distances of the adjustment wheel 10, the blade 20, and the grinding wheel 30 are calculated. Since the straight line connecting the contact point of the adjusting wheel 10 (or grinding wheel 30) with the work 2 and the rotation center P is along the moving direction (horizontal direction) of the adjusting wheel 10 (or grinding wheel 30), the adjusting wheel 10 The moving distance of the grinding wheel 30 is the same as the grinding amount (the final grinding amount is calculated from the processing dimension of the workpiece 2). Since the straight line connecting the contact point of the blade 20 with the work 2 and the rotation center P is inclined with respect to the moving direction (vertical direction) of the blade 20, the moving distance of the blade 20 is calculated from the grinding amount and the inclination angle. Is done.

Even with such a control method, as the grinding progresses, the first to third diameter dimensions L1, L2, and L3 are gradually reduced while maintaining the same length. An effect can be obtained.

Moreover, in the said embodiment, in order to synchronize the movement of the adjustment wheel 10, the blade 20 and the grinding wheel 30, the outer diameter dimension of the work 2 is measured, and the adjustment wheel 10, the blade 20 and the grinding wheel 30 corresponding to it. Although the distance is moved, it is not limited to this. Instead of the fixed gauge, a movement amount detecting means (not shown) may be provided. In this case, the moving amount of the adjusting wheel 10 is detected, the moving distance of the blade 20 and the grinding wheel 30 is calculated according to the moving distance of the adjusting wheel 10, and the moving of the adjusting wheel 10, the blade 20 and the grinding wheel 30 is performed. Synchronize. The movement amount detection means includes a position sensor and detects the position of the adjustment vehicle 10. The movement amount detection means is electrically connected to the control means. Note that the movement amount of the grinding wheel 30 may be detected by the movement amount detection means. In this case, the movement amount of the grinding wheel 30 is detected, the movement distance of the adjustment wheel 10 and the blade 20 is calculated according to the movement distance of the grinding wheel 30, and the movement of the adjustment wheel 10, the blade 20 and the grinding wheel 30 is moved. Synchronize.

As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said embodiment, A design change is possible suitably in the range which does not deviate from the meaning of this invention. In the embodiment, when the adjustment wheel 10, the blade 20, the grinding wheel 30 and the support member 41 are relatively moved, the support member 41 is fixed and the adjustment wheel 10, the blade 20 and the grinding wheel 30 are moved. However, it is not limited to this combination. If the support member 41 is moved, various combinations can be considered. Examples of combinations are given below. The support member and the grinding wheel can be moved synchronously, and the adjusting wheel and the blade are fixed (pattern 1). The support member and the adjustment wheel can be moved synchronously, and the grinding wheel and the blade are fixed (pattern 2). The support member, the grinding wheel, and the adjustment wheel can be moved synchronously, and the blade is fixed (pattern 3). The support member, the grinding wheel, and the blade can be moved synchronously, and the adjustment wheel is fixed (pattern 4). The support member, the adjusting wheel, and the blade can be moved synchronously, and the grinding wheel is fixed (pattern 5). In addition, when moving a support member, it is preferable to move a support member in the integrated state so that the axial center of a pair of support member may not shift | deviate.

DESCRIPTION OF SYMBOLS 1 Grinding machine 2 Workpiece 10 Adjusting wheel 14 Adjusting wheel moving means 20 Blade 23 Blade moving means 30 Grinding wheel 34 Grinding wheel moving means 40 Support device 41 Support member

Claims

It is equipped with an adjustment wheel, a blade, and a cylindrical grinding wheel.
A grinding machine that sandwiches and grinds the workpiece between the grinding wheel and the adjustment wheel while rotatably supporting a cylindrical workpiece with the adjustment wheel and the blade,
A support device that rotatably supports both ends of the workpiece;
The said support apparatus has a pair of support member which supports the rotation center of the both ends of the said workpiece | work in a coaxial state. The grinding machine characterized by the above-mentioned.
During grinding, the distance from the contact point between the adjustment wheel and the workpiece to the rotation center of the workpiece, the distance from the contact point between the blade and the workpiece to the rotation center of the workpiece, the contact point between the grinding wheel and the workpiece from the contact point The synchronization mechanism that relatively moves the adjusting wheel, the blade, the grinding wheel, and the support member so that the distance to the rotation center of the workpiece is the same is further provided. The grinding machine described.
The axial position of the support member is fixed,
The synchronization mechanism includes an adjustment wheel moving unit that applies a predetermined pressing force to the adjustment wheel to move the adjustment wheel to the workpiece side, and a predetermined pressing force to the blade to move the blade to the workpiece side. The apparatus according to claim 2, further comprising: a blade moving unit that moves the grinding wheel and a grinding wheel moving unit that applies a predetermined pressing force to the grinding wheel and moves the grinding wheel to the workpiece side. Grinder.
The axial position of the support member is fixed,
The said synchronizing mechanism is provided with the measuring device which measures the outer diameter of the said workpiece | work, and moves the said adjustment wheel and the said blade synchronously according to the measured outer diameter of the said workpiece | work. The grinding machine described in 1.
While supporting the rotation center of both ends of the cylindrical workpiece so that it can rotate coaxially,
A grinding method characterized in that the workpiece is sandwiched and ground between a grinding wheel and the adjusting wheel while the workpiece is rotated and supported by an adjusting wheel and a blade.