Cylindrical grinding machine

Abstract

To provide a cylindrical grinder capable of improving productivity in which a tail stock can be automatically moved and fixed according to a difference in a length of a workpiece.SOLUTION: An NC cylindrical grinder 1 includes: a table 4 as a base; a spindle stock 5 and an NC tail stock 6 that are arranged on the table 4; a movement mechanism 7 that moves at least one of the spindle stock 5 and the NC tail stock 6 in a Z-axis direction; and a protection cover 8 that is provided in the table 4 and protects the movement mechanism 7. A tooling base 9 for installation of a tooling device is arranged movably in the Z-axis direction, at a height position above the protection cover 8 in a portion between the spindle stock 5 and the NC tail stock 6. A guide mechanism is provided in between the table 4 and the tooling base 9, the guide mechanism being capable of guiding the tooling base 9 in the Z-axis direction and fixing the tooling base 9 at a desired position with respect to the table 4.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] This invention relates to a cylindrical grinding machine.

[0002] In the following description, the lower side of FIGS. 1, 3, 5, 7, 9, 11 and 12 is referred to as the front, the opposite side as the rear, and the left and right sides of the same figures as the left and right. Also, the upper and lower sides of FIGS. 2, 4, 6, 8, 10 and 13 are referred to as the upper and lower.

Background Art

[0003] A conventional cylindrical grinding machine 600 equipped with a standard center rest is shown in FIG. 11. In FIG. 11, the cylindrical grinding machine 600 includes a bed 601, a grinding wheel table 602 arranged movably in the X-axis direction (the vertical direction in FIG. 11) on the bed 601, a rotatable grinding wheel shaft (tool spindle) provided on the grinding wheel table 602 and holding a grinding wheel 603 at its tip, a grinding wheel shaft motor (tool spindle motor) for rotating the grinding wheel shaft, a table 604 arranged movably in the Z-axis direction (the left and right direction) on the bed 601 on the front side (operator side) of the grinding wheel table 602, a spindle head 605 arranged on the table 604 and holding one end of a workpiece W, a center rest 606 arranged on the table 604 and holding the other end of the workpiece W, and a tooling table 607 arranged between the spindle head 605 and the center rest 606 on the table 604 and having tooling equipment T such as a sizing device and a work rest installed thereon. In this cylindrical grinding machine 600, the tooling table 607 is manually moved and fixed in the Z-axis direction in accordance with the length of the workpiece W together with the spindle head 605 and the center rest 606.

[0004] In cylindrical grinding machines, it is being considered to use a NC tailstock that can be automatically moved in the Z-axis direction according to the length of the workpiece being machined. Figures 12 and 13 show an example of an NC cylindrical grinding machine equipped with a numerically controlled NC tailstock. In Figures 12 and 13, this type of cylindrical grinding machine 700 includes an NC tailstock 701 that is movable in the Z-axis direction on a table 604 and holds the end of the workpiece W opposite to the side held by the headstock 605, a pair of front and rear guide rails 702 that extend in the Z-axis direction to guide the NC tailstock 701, a moving mechanism 703 that moves the NC tailstock 701 along the guide rails 702 in the Z-axis direction, which is the axial direction of the workpiece W, by numerical control, and a protective cover 704 that protects the guide rails 702 and the moving mechanism 703 from coolant and the like. The moving mechanism 703 consists of a ball screw 705 made of a ball screw shaft extending in the Z-axis direction and a ball nut screwed onto the ball screw shaft via a plurality of balls, which is located between the two guide rails 702, and a motor 706 located to the right of the NC tailstock 701 that rotates the ball screw shaft of the ball screw 705, and the motor 706 is numerically controlled by a control device (not shown). The other components are the same as those of the cylindrical grinding machine 600 shown in Figure 11, and identical components are denoted by the same reference numerals. [Overview of the project] [Problems that the invention aims to solve]

[0005] However, in the cylindrical grinding machine 600 shown in Figure 11, the tailstock 606, like the headstock 605 and tooling table 607, is manually moved and fixed in the Z-axis direction to match the length of the workpiece W, which made the process cumbersome.

[0006] Furthermore, in the NC cylindrical grinding machine 700 shown in Figures 12 and 13, the NC tailstock 701 can be automatically moved and fixed in the Z-axis direction to match the length of the workpiece W, making the work easier. However, since the table 604 is equipped with guide rails 702, a moving mechanism 703, and a protective cover 704 to protect them from coolant, etc., there is a problem that a tooling stand equipped with tooling equipment such as a sizing device or work rest cannot be installed on the table 604. Generally, tooling equipment is frequently installed in cylindrical grinding machines, so the inability to install a tooling stand on the table is a critical problem. As a result, NC tailstocks, which are common in lathes, have not become widespread in cylindrical grinding machines, and this is an obstacle to improving productivity with cylindrical grinding machines.

[0007] The objective of this invention is to solve the above problems and provide a cylindrical grinding machine that can automatically move and fix the tailstock to match the differences in workpiece length, thereby improving productivity. [Means for solving the problem]

[0008] To achieve the above objective, the present invention comprises the following embodiments.

[0009] 1) A bed, a grinding wheel stand placed on the bed, a table placed on the bed on the operator's side of the grinding wheel stand, and the table A spindle head positioned on top and rotatably supporting one end of the workpiece, and the table A tailstock positioned above and rotatably supporting the other end of the workpiece, and table A moving mechanism provided therein is used to move at least one of the headstock and the tailstock in the Z-axis direction, which is the axial direction of the workpiece, and table It comprises a protective cover provided on top to protect the moving mechanism. It is a cylindrical grinding machine, On the table above A tooling stand for installing tooling equipment is positioned at a height above the protective cover in the portion between the headstock and the tailstock, and is movable in the Z-axis direction. table Between the tooling stand and the tooling stand, the tooling stand is guided in the Z-axis direction and the tableA guide mechanism is provided that allows it to be fixed in the required position. And, The tooling stand has a tooling equipment mounting section that overlaps the protective cover when viewed from above, and a guide mechanism mounting section that protrudes from at least one of the worker side and the non-worker side of the protective cover for mounting the guide mechanism, and the table has an overhang that extends from the worker side and the non-worker side of the tooling stand in the same direction as the guide mechanism mounting section, and the guide mechanism is located between the guide mechanism mounting section of the tooling stand and the overhang of the table. It is provided Cylindrical grinding machine.

[0010] 2) The tooling stand The projection for installing the guide mechanism A leg portion extending downward is fixedly provided, and the guide mechanism is the The protruding part of the table A guide groove formed on the upper surface and extending in the Z-axis direction, a clamp piece fitted into the guide groove so as to be movable in the Z-axis direction, and a device provided on the leg portion of the tooling stand that fixes the clamp piece in a required position within the guide groove to the tooling stand table The cylindrical grinding machine described in 1) above, further comprising a clamp bolt for fixing to the object.

[0011] 3) The above Upper surface of the aforementioned protruding part of the table A support member is fixedly provided above, protruding upward to support the tooling base, and the guide mechanism includes a guide groove formed on the upper surface of the support member and extending in the Z-axis direction, a clamp piece fitted into the guide groove so as to be movable in the Z-axis direction, and the tooling base The projection for installing the guide mechanism The tooling base is provided and the clamp piece is fixed at the required position within the guide groove. table The cylindrical grinding machine described in 1) above, further comprising a clamp bolt for fixing to the object.

[0012] 4) The tooling stand has two protrusions for installing guide mechanisms that extend beyond the protective cover toward the worker and the non-worker, and the table has two overhangs that extend beyond the protective cover toward the worker and the non-worker, Operator of the protective cover on the tooling stand side Anti-workers side One of us The protruding part for installing the guide mechanism A leg portion extending downward is fixedly provided, and the table Operator of the protective cover in side Anti-workers side Either of us or the other The upper surface of the aforementioned protruding portion A support member is fixedly provided above, protruding upward and supporting the tooling base, and the guide mechanism is the The protruding part of the tableA first guide groove formed on the upper surface and extending in the Z-axis direction, a first clamp piece fitted into the first guide groove so as to be movable in the Z-axis direction, and a device provided on the leg portion of the tooling stand that fixes the first clamp piece in a required position within the first guide groove to the tooling stand table A first clamp bolt for fixing to the support member, a second guide groove formed on the upper surface of the support member and extending in the Z-axis direction, a second clamp piece fitted into the second guide groove so as to be movable in the Z-axis direction, and the tooling base The projection for installing the guide mechanism The tooling base is provided and the second clamp piece is fixed at the required position within the second guide groove. table The cylindrical grinding machine according to 1) above, further comprising a second clamp bolt for fixing to the

[0013] 5) The above The table is the aforementioned On the bed It is provided to be movable in the Z-axis direction. The cylindrical grinding machine described in 1) above. [Effects of the Invention]

[0014] In the cylindrical grinding machines described in 1) to 5) above, the tooling stand for the tooling equipment, on which tooling devices such as a sizing device and a work rest are installed, is positioned at a height spaced above the protective cover in the area between the headstock and the tailstock, and is movable in the Z-axis direction. Therefore, even if a protective cover is provided to protect the tailstock movement mechanism, which consists of a ball screw and a motor that operates the ball screw, from coolant, the tooling stand can be moved in the Z-axis direction according to the length of the workpiece without interfering with the protective cover. Furthermore, the tooling stand can be guided in the Z-axis direction by a guide mechanism and fixed to the base at the required position. Thus, it becomes possible to use the machine as an NC cylindrical grinding machine equipped with a tooling stand that moves and is fixed in the Z-axis direction according to the length of the workpiece being processed, and an NC tailstock that automatically moves and is fixed in the Z-axis direction according to the length of the workpiece being processed, thereby improving productivity.

[0015] According to the cylindrical grinding machines of 2) to 4) above, it becomes possible to arrange the turret movably in the Z-axis direction at a height position spaced above the protective cover in the portion between the spindle headstock and the steady rest relatively easily, and the structure of the guide mechanism also becomes relatively simple.

Brief Description of the Drawings

[0016] [Figure 1] It is a schematic plan view omitting the workpiece showing the NC cylindrical grinding machine of Embodiment 1 of this invention. [Figure 2] It is an enlarged cross-sectional view taken along line A-A of FIG. 1. [Figure 3] It is a schematic plan view omitting the workpiece showing the NC cylindrical grinding machine of Embodiment 2 of this invention. [Figure 4] It is an enlarged cross-sectional view taken along line B-B of FIG. 3 [Figure 5] It is a schematic plan view omitting the workpiece showing the NC cylindrical grinding machine of Embodiment 3 of this invention. [Figure 6] It is an enlarged cross-sectional view taken along line C-C of FIG. 5. [Figure 7] It is a schematic plan view omitting the workpiece showing the NC cylindrical grinding machine of Embodiment 4 of this invention. [Figure 8] It is an enlarged cross-sectional view taken along line D-D of FIG. 7. [Figure 9] It is a schematic plan view omitting the workpiece showing the NC cylindrical grinding machine of Embodiment 5 of this invention. [Figure 10] It is an enlarged cross-sectional view taken along line E-E of FIG. 9. [Figure 11] It is a schematic plan view showing a cylindrical grinding machine equipped with a conventional standard steady rest. [Figure 12] It is a schematic plan view omitting the workpiece showing an NC cylindrical grinding machine equipped with a conventional NC steady rest. [Figure 13] It is an enlarged cross-sectional view taken along line F-F of FIG. 12.

Modes for Carrying Out the Invention

[0017] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0018] In the following description, identical objects and identical parts will be denoted by the same reference numeral. Embodiment 1 This embodiment is shown in Figures 1 and 2. Figures 1 and 2 schematically show the overall configuration of the NC cylindrical grinding machine.

[0019] In Figures 1 and 2, the NC cylindrical grinding machine 1 comprises a bed 2, a grinding wheel base 3 which is movable on the bed 2 in the X-axis direction (up and down direction in Figure 1) and has a rotatable grinding wheel spindle (not shown) that holds the grinding wheel 31, a table 4 which serves as a base and is movable on the bed 2 in the Z-axis direction (left and right direction) in front of the grinding wheel base 3 (operator side), a headstock 5 which is positioned on the table 4 and holds one end of the workpiece W, and a mechanism which is positioned on the table 4 which is movable in the Z-axis direction, which is the axial direction of the workpiece W, and holds the other end of the workpiece W and processes it. The system includes an NC tailstock 6 that is moved in the Z-axis direction to match the length of the workpiece W and then fixed; a moving mechanism 7 that moves the NC tailstock 6 in the Z-axis direction by numerical control; a protective cover 8 that protects the moving mechanism 7 from coolant and the like; a tooling stand 9 for installing tooling equipment, which is positioned above the protective cover 8 in the area between the headstock 5 and the NC tailstock 6 and is movable in the Z-axis direction, and for installing tooling equipment T; and a guide mechanism that guides the tooling stand 9 in the Z-axis direction and can fix it to the table 4 at the required position.

[0020] Guide rails 41 extending in the Z-axis direction are provided at the front and rear ends of the table 4, and the NC tailstock 6 is mounted straddling both guide rails 41 so that it moves in the Z-axis direction along both guide rails 41. The moving mechanism 7 consists of a ball screw 71, which is located between the two guide rails 41 and consists of a ball screw shaft extending in the Z-axis direction and a ball nut screwed onto the ball screw shaft via multiple balls, and a motor 72 located to the right of the NC tailstock 6 that rotates the ball screw shaft of the ball screw 71. The motor 72 is numerically controlled by a control device (not shown). The protective cover 8 covers both guide rails 41, the ball screw 71 and the motor 72.

[0021] The tooling stand 9 is provided with at least one of the portions that protrude towards the worker and the portion that protrudes away from the worker, in this case a forward projection 91 that protrudes towards the worker, and a downwardly protruding leg portion 92 is integrally provided on the forward projection 91.

[0022] The guide mechanism, which guides the tooling base 9 in the Z-axis direction and can fix it to the table 4 at the required position, includes, in this embodiment, a dovetail-shaped guide groove 101 formed on the worker side (front side) and extending in the Z-axis direction in at least one of the worker-side portion and the non-worker-side portion of the protective cover 8 on the upper surface of the table 4; a clamp piece 102 fitted into the guide groove 101 so as to be movable in the Z-axis direction; and a clamp bolt 103 that penetrates the front projection 91 and leg portion 92 of the tooling base 9 in the vertical direction and fixes the clamp piece 102 in the required position within the guide groove 101, thereby fixing the tooling base 9 to the table 4.

[0023] In the cylindrical grinding machine 1 described above, the NC tailstock 6 is moved along the guide rail 41 in the Z-axis direction by the moving mechanism 7 to match the length of the workpiece W to be machined, and is fixed in the required position. The protective cover 8 may expand or contract with the movement of the NC tailstock 6, or it may retract into a space provided on the underside of the headstock 5 as the NC tailstock 6 moves. The tooling stand 9 is designed to be moved in the Z-axis direction with the clamp bolts 103 loosened so that the clamp pieces 102 can slide within the guide groove 101. At the required position matching the length of the workpiece W to be machined, the clamp bolts 103 are tightened, fixing the clamp pieces 102 within the guide groove 101, thereby fixing it to the table 4. Embodiment 2 This embodiment is shown in Figures 3 and 4. Figures 3 and 4 schematically show the overall configuration of the NC cylindrical grinding machine.

[0024] In the NC cylindrical grinding machine 200 shown in Figures 3 and 4, the tooling base 9 is provided with a front projection 91 that protrudes towards the operator from the protective cover 8, as well as a rear projection 93 that protrudes away from the operator, and the rear projection 93 is also integrally provided with legs 94.

[0025] The guide mechanism, which guides the tooling base 9 in the Z-axis direction and can fix it to the table 4 at the required position, includes a guide groove 101 on the front side of the protective cover 8, a clamp piece 102 fitted into the guide groove 101, and a clamp bolt 103 for fixing the clamp piece 102, as well as a dovetail-shaped guide groove 104 formed on the rear side of the protective cover 8 on the upper surface of the table 4 and extending in the Z-axis direction, a clamp piece 105 fitted into the guide groove 104 so as to be movable in the Z-axis direction, and a clamp bolt 106 that penetrates the rear projection 93 and leg portion 94 of the tooling base 9 in the vertical direction and fixes the clamp piece 105 in the required position within the guide groove 104, thereby fixing the tooling base 9 to the table 4.

[0026] The other components are the same as those of the NC cylindrical grinding machine in Embodiment 1, and the tooling stand 9 is guided in the Z-axis direction and fixed in the required position, similar to the NC cylindrical grinding machine 1 in Embodiment 1.

[0027] In the NC cylindrical grinding machine 200 of Embodiment 2, the tooling base 9 is supported by legs 92 and 94 at both the front and rear ends, so the support rigidity of the tooling base 9 is improved compared to the NC cylindrical grinding machine 1 of Embodiment 1. Embodiment 3 This embodiment is shown in Figures 5 and 6. Figures 5 and 6 schematically show the overall configuration of the NC cylindrical grinding machine.

[0028] In the NC cylindrical grinding machine 300 shown in Figures 5 and 6, at least one of the operator-side portion and the non-operator-side portion of the protective cover 8 on the upper surface of the table 4 is fixedly provided with an upwardly protruding support member 301 below the forward protrusion 91 on the operator-side (front) portion.

[0029] The guide mechanism, which guides the tooling base 9 in the Z-axis direction and can fix it to the table 4 at a required position, comprises a dovetail-shaped guide groove 107 formed on the upper surface of the support member 301 and extending in the Z-axis direction, a clamp piece 108 fitted into the guide groove 107 so as to be movable in the Z-axis direction, and a clamp bolt 109 provided so as to penetrate the forward projection 91 of the tooling base 9 and fixes the clamp piece 108 at a required position in the guide groove 107, thereby fixing the tooling base 9 to the table 4.

[0030] The other components are the same as those of the NC cylindrical grinding machine 1 in Embodiment 1.

[0031] In the cylindrical grinding machine 300 described above, the NC tailstock 6 is moved along the guide rail 41 in the Z-axis direction to match the length of the workpiece W to be machined, and is fixed in the required position. The protective cover 8 may expand or contract with the movement of the NC tailstock 6, or it may retract into a space provided on the underside of the headstock 5 as the NC tailstock 6 moves. The tooling stand 9 is designed to be moved in the Z-axis direction with the clamp bolts 109 loosened so that the clamp pieces 108 can slide within the guide groove 107. At the required position matching the length of the workpiece W to be machined, the clamp bolts 109 are tightened, fixing the clamp pieces 108 within the guide groove 107, thereby fixing the tooling stand to the table 4. Embodiment 4 This embodiment is shown in Figures 7 and 8. Figures 7 and 8 schematically show the overall configuration of the NC cylindrical grinding machine.

[0032] In the NC cylindrical grinding machine 400 shown in Figures 7 and 8, the table 4 is equipped with an upwardly protruding support member 301 fixedly provided on the operator-side portion of the protective cover 8, as well as an upwardly protruding support member 401 fixedly provided below the rearward protrusion 93 on the non-operator-side portion of the protective cover 8.

[0033] The guide mechanism, which guides the tooling base 9 in the Z-axis direction and can fix it to the table 4 at the required position, includes a guide groove 107 in the support portion 301, a clamp piece 108 fitted into the guide groove 107, and a clamp bolt 109 for fixing the clamp piece 108, as well as a guide groove 110 formed on the upper surface of the rear support member 401 and extending in the Z-axis direction, a clamp piece 111 fitted into the guide groove 110 so as to be movable in the Z-axis direction, and a clamp bolt 112 provided on the tooling base 9 that fixes the clamp piece 111 at the required position in the guide groove 110 and fixes the tooling base 9 to the table 4.

[0034] The other components are the same as those of the NC cylindrical grinding machine in Embodiment 3, and the tooling stand 9 is guided in the Z-axis direction and fixed in the required position, similar to the NC cylindrical grinding machine in Embodiment 3.

[0035] In the NC cylindrical grinding machine 400 of Embodiment 4, the tooling base 9 is supported at both the front and rear ends by support members 301 and 401, so the support rigidity of the tooling base 9 is improved compared to the NC cylindrical grinding machine 300 of Embodiment 3. Embodiment 5 This embodiment is shown in Figures 9 and 10. Figures 9 and 10 schematically show the overall configuration of the NC cylindrical grinding machine.

[0036] In the NC cylindrical grinding machine 500 shown in Figures 9 and 10, the table 4 is equipped with an upwardly protruding support member 301 fixedly located below the forward protrusion 91 on the operator-side portion of the protective cover 8. The tooling stand 9 is equipped with a rearward protrusion 93 that protrudes further away from the operator than the protective cover 8, and a leg portion 94 integrally provided with the rearward protrusion 93.

[0037] The guide mechanism, which guides the tooling base 9 in the Z-axis direction and can fix it to the table 4 at the required position, comprises a guide groove 107 in the support member 301, a clamp piece 108 fitted into the guide groove 107 and a clamp bolt 109 for fixing the clamp piece 108, a guide groove 104 formed on the non-worker side (rear side) of the protective cover 8 on the upper surface of the table 4, a clamp piece 105 fitted into the guide groove 104 so as to be movable in the Z-axis direction, and a clamp bolt 106 that penetrates the rear projection 93 and leg portion 94 of the tooling base 9 in the vertical direction and fixes the clamp piece 105 in the required position within the guide groove 104 to fix the tooling base 9 to the table 4.

[0038] The other components are the same as those of the NC cylindrical grinding machine in Embodiment 1, and the tooling stand 9 is guided in the Z-axis direction and fixed in the required position, similar to the NC cylindrical grinding machine in Embodiment 1.

[0039] In the NC cylindrical grinding machine of Embodiment 5, the tooling base 9 is supported at both the front and rear ends by the support members 301 and the legs 94, so the support rigidity of the tooling base 9 is improved compared to the NC cylindrical grinding machine of Embodiment 1.

[0040] Although not shown in the diagram, the guide mechanism that guides the tooling base 9 in the Z-axis direction and can fix it to the table 4 at the required position may include a dovetail-shaped guide groove 101 formed on the operator side of the protective cover 8 on the upper surface of the table 4 and extending in the Z-axis direction, a clamp piece 102 fitted into the guide groove 101, a clamp bolt 103 that penetrates the front projection 91 and leg portion 92 of the tooling base 9 in the vertical direction and fixes the clamp piece 102 at the required position in the guide groove 101 to fix the tooling base 9 to the table 4, a guide groove 110 formed on the upper surface of a support member 401 fixedly provided on the rear part of the table 4 and extending in the Z-axis direction, a clamp piece 111 fitted into the guide groove 110 so as to be movable in the Z-axis direction, and a clamp bolt 112 provided on the tooling base 9 and fixing the clamp piece 111 at the required position in the guide groove 110 to fix the tooling base 9 to the table 4.

[0041] In this case as well, since the tooling base 9 is supported at both the front and rear ends by the support members 401 and the legs 92, the support rigidity of the tooling base 9 is improved compared to the NC cylindrical grinding machine of Embodiment 1. [Industrial applicability]

[0042] The cylindrical grinding machine according to this invention is preferably used as an NC cylindrical grinding machine in which the tailstock is moved in the Z-axis direction according to the length of the workpiece being machined by numerical control. [Explanation of Symbols]

[0043] 1: NC cylindrical grinding machine, 2: Bed, 4: Table, 5: Headstock, 6: NC tailstock, 7: Moving mechanism, 8: Protective cover, 9: Tooling stand, 92: Legs, 94: Legs, 101: Guide groove, 102: Clamp piece, 103: Clamp bolt, 104: Guide groove, 105: Clamp piece, 106: Clamp bolt, 107: Guide groove, 108: Clamp piece, 109: Clamp bolt, 110: Guide groove, 111: Clamp piece, 112: Clamp bolt, 200: NC cylindrical grinding machine, 300: NC cylindrical grinding machine, 301: Support member, 400: NC cylindrical grinding machine, 401: Support member, 500: NC cylindrical grinding machine, W: Workpiece

Claims

1. A cylindrical grinding machine comprising: a bed; a grinding wheel holder disposed on the bed; a table disposed on the bed on the operator side of the grinding wheel holder; a headstock disposed on the table and rotatably supporting one end of a workpiece; a tailstock disposed on the table and rotatably supporting the other end of the workpiece; a moving mechanism provided on the table for moving at least one of the headstock and the tailstock in the Z-axis direction, which is the axial direction of the workpiece; and a protective cover provided on the table for protecting the moving mechanism, A tooling stand for installing tooling equipment is positioned above the protective cover in the portion of the table between the headstock and the tailstock, and is movable in the Z-axis direction. A guide mechanism is provided between the table and the tooling stand that guides the tooling stand in the Z-axis direction and fixes it in a required position relative to the table. A cylindrical grinding machine in which the tooling stand has a tooling equipment mounting section that overlaps the protective cover when viewed from above, and a guide mechanism mounting section that protrudes from at least one of the operator side and the non-operator side of the protective cover for mounting the guide mechanism, and the table has an overhang that extends from the operator side and the non-operator side of the tooling stand in the same direction as the guide mechanism mounting section, and the guide mechanism is provided between the guide mechanism mounting section of the tooling stand and the overhang of the table.

2. The cylindrical grinding machine according to claim 1, wherein a leg portion extending downward is fixedly provided on the protruding portion for installing the guide mechanism of the tooling stand, and the guide mechanism comprises a guide groove formed on the upper surface of the overhang portion of the table and extending in the Z-axis direction, a clamp piece fitted into the guide groove so as to be movable in the Z-axis direction, and a clamp bolt provided on the leg portion of the tooling stand and fixing the clamp piece in a required position in the guide groove to fix the tooling stand to the table.

3. A cylindrical grinding machine according to claim 1, wherein a support member is fixedly provided on the upper surface of the overhang portion of the table, projecting upward to support the tooling stand, and the guide mechanism comprises a guide groove formed on the upper surface of the support member and extending in the Z-axis direction, a clamp piece fitted into the guide groove so as to be movable in the Z-axis direction, and a clamp bolt provided on the protruding portion of the tooling stand for installing the guide mechanism, which fixes the clamp piece in a required position in the guide groove and fixes the tooling stand to the table.

4. The tooling stand has two guide mechanism mounting protrusions that project from the worker side and the non-worker side of the protective cover, and the table has two overhangs that project from the worker side and the non-worker side of the protective cover, and a downward-extending leg is fixedly provided on the guide mechanism mounting protrusion of the tooling stand that projects from either the worker side or the non-worker side of the protective cover, and a support member that projects upward and supports the tooling stand is fixedly provided on the upper surface of the overhang that projects from either the worker side or the non-worker side of the protective cover of the table, and the guide mechanism is formed on the upper surface of the overhang of the table and extends in the Z-axis direction The cylindrical grinding machine according to claim 1, comprising: a first guide groove; a first clamp piece fitted into the first guide groove so as to be movable in the Z-axis direction; a first clamp bolt provided on the leg portion of the tooling stand and fixing the first clamp piece at a required position in the first guide groove to fix the tooling stand to the table; a second guide groove formed on the upper surface of the support member and extending in the Z-axis direction; a second clamp piece fitted into the second guide groove so as to be movable in the Z-axis direction; and a second clamp bolt provided on the guide mechanism mounting projection of the tooling stand and fixing the second clamp piece at a required position in the second guide groove to fix the tooling stand to the table.

5. The cylindrical grinding machine according to claim 1, wherein the table is provided on the bed so as to be movable in the Z-axis direction.

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