JP2006150484A - Mounting structure of emery wheel and grinder furnished with it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure of an emery wheel capable of attempting simplification mounting work of the emery wheel and its corresponding automation by eliminating bolt fastening at a plurality of points conventionally required in mounting the emery wheel on a wheel spindle and a grinder furnished with it. <P>SOLUTION: This structure to mount the emery wheel 32 on the wheel spindle 31 by pressure-welding it on a wheel stopper 34 is furnished with a positioning means 4 having a first positioning part 4A to position the emery wheel 32 in the circumferential direction on the wheel spindle 31 and a second positioning part 4B to position the emery wheel 32 in the axial direction on the wheel spindle 31. Consequently, it is possible to certainly prevent occurrence of slippage in the rotating direction and in the axial direction of the emery wheel 32 due to grinding resistance, etc. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a grinding wheel mounting structure for grinding, for example, a cylindrical workpiece, and a grinding machine equipped with the same.

  For example, a grinding machine as a machine tool includes a bed on which a work table and a grindstone table are mounted, a grindstone shaft having a grindstone shaft that can be rotationally driven by a rotational drive device, and a grindstone device that grinds the workpiece, and the entire drive Are controlled by a computer numerical control (CNC) device.

  Conventionally, in this type of grinding machine, the grinding wheel shaft is cantilevered so as to be rotatable with respect to the grinding wheel base because it is easy to attach / remove (replace) the grinding wheel and perform maintenance / inspection. The thing is employ | adopted (for example, refer patent document 1). In this case, the grindstone shaft is formed by a stepped shaft having six bolt mounting holes arranged in parallel at equal intervals in the circumferential direction. Further, the grinding wheel is formed by an annular plate with an abrasive grain layer having six bolt insertion holes respectively corresponding to the six bolt mounting holes.

In such a grinding machine, the grinding wheel is attached to the grinding wheel shaft by holding the grinding wheel on the outer peripheral surface of the grinding wheel shaft, and then inserting the bolt into the bolt insertion hole of the grinding wheel, and then inserting the bolt. This is done by screwing the part into the bolt mounting hole.
Japanese Patent Laid-Open No. 7-40237 (FIGS. 1, 2, and 7)

  However, according to the grinding wheel mounting structure shown in Patent Document 1, since the grinding wheel is attached to the grinding wheel shaft only by tightening a screw (bolt), the rotational direction and the axial direction of the grinding wheel due to grinding resistance or the like. In order to prevent the occurrence of slippage, it is necessary to tighten bolts at a plurality of locations (six locations), which increases the number of times of bolt tightening, and complicates the mounting (replacement) operation of the grinding wheel and its automation. is there.

  The present invention has been made in view of such circumstances, and eliminates the need for bolting at a plurality of locations conventionally required when the grinding wheel is attached to the grinding wheel shaft. A grinding wheel mounting structure and a grinding machine equipped with the same can be provided.

(1) The grinding wheel mounting structure of the present invention (first invention) has a wheel stopper at one end on one side and can be rotationally driven by a rotary drive device, and the wheel stopper side end of the grinding wheel shaft And an annular grinding wheel that grinds the workpiece, and is attached to the grinding wheel shaft by pressing the grinding wheel against the wheel stopper, and the grinding wheel is arranged in a circumferential direction with respect to the grinding wheel shaft. A positioning means having a first positioning portion for positioning the grinding wheel and a second positioning portion for positioning the grinding wheel in the axial direction with respect to the grinding wheel shaft is provided.
According to the grinding wheel mounting structure of the first invention, the grinding wheel is attached to the grinding wheel shaft in the circumferential direction by the first positioning portion and in the axial direction by the second positioning portion. This is done by positioning. As a result, it is possible to reliably prevent the grinding wheel from being displaced in the rotational direction and the axial direction due to grinding resistance, etc., so that bolting at multiple locations conventionally required when mounting the grinding wheel on the grinding wheel shaft is unnecessary. Therefore, it is possible to simplify the grinding wheel mounting operation and automation.

(2) The grinding wheel mounting structure of the present invention (second invention) is rotatably supported by a grinding wheel platform and has a first shaft with a wheel stopper that can be rotationally driven by a rotational drive device, and the wheel of the first shaft. A grinding wheel shaft comprising a second shaft that is detachably coupled to the stopper side end, and an annular grinding wheel that is held by the wheel stopper side end of the first shaft and grinds a workpiece, The wheel stopper is attached to the grinding wheel shaft in pressure contact with the grinding wheel shaft, the first positioning portion for positioning the grinding wheel in the circumferential direction with respect to the grinding wheel shaft, and the grinding wheel with respect to the grinding wheel shaft. A positioning means having a second positioning portion for positioning in the axial direction is provided.
According to the grinding wheel mounting structure of the second invention, the grinding wheel is attached to the grinding wheel shaft composed of the first shaft and the second shaft in the circumferential direction by the first positioning portion of the grinding wheel on the grinding wheel shaft. This is done by positioning in the axial direction by the second positioning part. As a result, it is possible to reliably prevent the grinding wheel from being displaced in the rotational direction and the axial direction due to grinding resistance, etc., so that bolting at multiple locations conventionally required when mounting the grinding wheel on the grinding wheel shaft is unnecessary. Therefore, it is possible to simplify the grinding wheel mounting operation and automation.

(3) In the grinding wheel mounting structure described in (2) above, the first shaft and the second shaft are rotatably supported on the grinding wheel platform via a first bearing and a second bearing, respectively. Of the bearings, the second bearing is preferably disposed with respect to the grindstone table so as to advance and retreat along the first axis together with the second axis.
Since it is comprised in this way, in order to make a 2nd axis | shaft approach with respect to a 1st axis | shaft, a 2nd bearing will be advanced toward a 1st axis | shaft with a 2nd axis | shaft. In order to separate the second shaft from the first shaft, the second bearing is retracted from the first shaft together with the second shaft. Thus, when the grinding wheel is replaced, the second shaft is moved together with the second bearing in a direction away from the first shaft, and a space for exchanging the grinding wheel is secured between the first shaft and the second shaft. be able to.

(4) In the grinding wheel mounting structure according to any one of (1) to (3), the first positioning portion is provided between an outer peripheral surface of the grinding wheel shaft and an inner peripheral surface of the grinding wheel. It is preferable that each comprises a concave / convex portion that fits each other. Here, when the grinding wheel shaft is provided with a convex portion, the grinding wheel is provided with a concave portion, and when the grinding wheel shaft is provided with a concave portion, the grinding wheel is provided with a convex portion.
Because it is configured in this way, the grinding wheel on the grinding wheel shaft is positioned in the circumferential direction by fitting the concave portion and the convex portion, and the occurrence of deviation in the rotational direction of the grinding wheel due to grinding resistance or the like is reliably prevented. can do.

(5) In the grinding wheel mounting structure according to any one of (1) to (3), the first positioning portion includes a recess in an outer peripheral portion of the grinding wheel shaft and an inner peripheral portion of the grinding wheel. In addition, it is preferable to have a coupling member that fits into the recess. Here, a key, a pin, a spline, or the like is used as the coupling member.
Since it is configured in this way, the grinding wheel on the grinding wheel shaft is positioned in the circumferential direction by fitting the recess and the coupling member such as a key or a pin, and the deviation in the rotational direction of the grinding wheel due to grinding resistance or the like is prevented. Occurrence can be reliably prevented.

(6) In the grinding wheel mounting structure according to any one of (1) to (5), the second positioning portion includes a spring that presses the grinding wheel against the wheel stopper, and a pressure welding of the grinding wheel. It is preferable to have a spring stopper that restricts the movement of the spring in the releasing direction.
Since it is configured in this way, the grinding wheel on the grinding wheel shaft is positioned in the axial direction by the spring and the spring stopper, and it is possible to reliably prevent the grinding wheel from being displaced in the axial direction due to grinding resistance or the like.

(7) A grinding machine according to the present invention (third invention) is rotatably supported by a grindstone table, and is mounted on the grindstone shaft and can be rotated by a rotation driving device. In a grinding machine provided with a grinding wheel device having a grinding wheel, the structure for attaching the grinding wheel to the grinding wheel shaft is the mounting structure according to any one of (1) to (6) above. .
According to the grinding machine of the third invention, the grinding wheel is attached to the grinding wheel shaft or the grinding wheel is attached to the grinding wheel shaft composed of the first shaft and the second shaft. The positioning is performed in the circumferential direction and in the axial direction by the second positioning portion. As a result, it is possible to reliably prevent the grinding wheel from being displaced in the rotational direction and the axial direction due to grinding resistance, etc., so that bolting at multiple locations conventionally required when mounting the grinding wheel on the grinding wheel shaft is unnecessary. Therefore, a grinding machine capable of simplifying the grinding wheel mounting operation and automation can be obtained.

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

(First embodiment)
FIG. 1 is a plan view showing a grinding machine (cylindrical grinding machine) equipped with a grinding wheel mounting structure according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view showing the grinding wheel mounting structure according to the first embodiment of the present invention. 3 is a cross-sectional view taken along the line III-III in FIG.

  In FIG. 1, a cylindrical grinding machine 1 has a grinding wheel 32 around a bed 2 as a base, a grinding wheel device 3 for grinding a workpiece W, and a grinding wheel shaft 31 of the grinding wheel device 3. Positioning means 4 for positioning in the direction and the axial direction, a workpiece support / rotation drive device 5 for supporting and rotating the workpiece W, an NC for driving and controlling the workpiece support / rotation drive device 5 and the grinding wheel device 3 etc. (Numerical control) It is roughly constituted by a device (not shown).

(Configuration of each part)
On the bed 2, as shown in FIG. 1, a grindstone base 21 that can be advanced and retracted in the ± X-axis direction by a first moving device (not shown) and a ± Z-axis direction by a second moving device (not shown). A work table 22 that can be advanced and retracted is mounted.

  As shown in FIG. 1, the grinding wheel device 3 includes a grinding wheel shaft 31 and a grinding wheel 32, and is disposed on the grinding wheel base 21. And it is comprised so that it may drive with a rotational drive motor (not shown).

  The grindstone shaft 31 is cantilevered rotatably on a grindstone base 21 via a bearing body 33 (shown in FIG. 1), and has three shaft portions 31A to 31C having different outer diameters as shown in FIG. It is formed by the stepped shaft which has. And it is comprised so that it may be rotationally driven by the rotational drive apparatus (rotary drive motor of the grinding wheel apparatus 3).

  The shaft portion 31A has an outer diameter larger than the outer diameters of the other shaft portions 31B and 31C, and is rotatably supported by the bearing body 33. A wheel stopper 34 that restricts the movement of the grinding wheel 32 toward the bearing body is provided at the peripheral edge of the end surface of the shaft 31A on the side opposite to the bearing body.

  The shaft portion 31B has an outer diameter that is an intermediate dimension between the outer diameter of the shaft portion 31A and the outer diameter of the shaft portion 31C, and is connected to the central portion of the end surface on the side opposite to the bearing body of the shaft portion 31A. Convex portions 35 and 36 protruding in the outer diameter direction are integrally provided on the outer peripheral surface of the shaft portion 31B. As shown in FIG. 3, the convex portions 35 and 36 are arranged at equal intervals (180 °) in the circumferential direction of the shaft portion 31B, and the axial direction extends from the wheel stopper side end surface of the shaft portion 31B to the vicinity of the anti-wheel stopper side end surface. It is extended and formed.

  The shaft portion 31C has an outer diameter smaller than the outer diameters of the other shaft portions 31A and 31B, and is connected to the central portion of the end surface on the side opposite to the bearing body of the shaft portion 31B. A male screw portion 31c for screwing the spring stopper 42 is provided on the outer peripheral surface of the shaft portion 31C.

  As shown in FIGS. 2 and 3, the grinding wheel 32 has a wheel 32 </ b> A and an abrasive grain layer 32 </ b> B, and is attached to the wheel stopper side end portion (shaft portion 31 </ b> B) of the grinding wheel shaft 31 by the positioning means 4. And it is comprised so that it may be rotationally driven with the grindstone axis | shaft 31. FIG.

  The wheel 32 </ b> A is made of an annular plate, and is held on the shaft portion 31 </ b> B of the grindstone shaft 31 with the wheel one side end face being pressed against the wheel stopper 34. The wheel 32 </ b> A is provided with concave grooves 37 and 38 that are open on the inner peripheral surface of the wheel and the end surface on the side of the wheel stopper and are fitted to the convex portions 35 and 36. The longitudinal (axial) direction dimension of the concave grooves 37 and 38 is set to be slightly larger than the longitudinal (axial) direction dimension of the convex portions 35 and 36.

  The abrasive grain layer 32B is disposed on the outer peripheral surface of the wheel 32A, and is configured to grind the workpiece W by the rotation of the grinding wheel 32 (grinding wheel shaft 31).

  As shown in FIG. 2, the positioning means 4 includes a first positioning portion 4A and a second positioning portion 4B, and is disposed around the grindstone shaft 31 (shaft portions 31B and 31C). The grinding wheel 32 is positioned in the circumferential direction and the axial direction with respect to the grinding wheel shaft 31.

  4 A of 1st positioning parts consist of the convex parts 35 and 36 of the grindstone shaft 31, and the concave grooves 37 and 38 of the grinding wheel 32, and are comprised so that the grinding wheel 32 on the grindstone shaft 31 may be positioned in the circumferential direction. .

  The second positioning portion 4B includes a spring 41 and a spring stopper 42, and is configured to press the grinding wheel 32 on the grinding wheel shaft 31 against the wheel stopper 34 and position it in the axial direction.

  The spring 41 is composed of a disc spring, is held on the shaft portion 31 </ b> C of the grindstone shaft 31, and is elastically mounted between the spring stopper 42 and the wheel stopper 34. The grinding wheel 32 is pressed against the wheel stopper 34.

  The spring stopper 42 is formed of a ring body with a female screw, is disposed on the side opposite to the wheel stopper of the spring 41, and is screwed to the male screw portion 31c of the shaft portion 31C. And it is comprised so that the movement of the spring 41 to the direction which cancels | releases the press contact of the grinding wheel 32 is controlled.

  As shown in FIG. 1, the work support / rotation drive device 5 includes a spindle stock 5 </ b> A and a tailstock 5 </ b> B and is mounted on a work table 22. And it is comprised so that the workpiece | work W may be supported and rotationally driven.

  The headstock 5A includes a main shaft 51 protruding toward the tailstock and a rotation motor (not shown) that rotationally drives the main shaft 51, and is configured to support and rotate the workpiece W together with the tailstock 5B. ing.

  The tailstock 5B has a center 52 that protrudes toward the main shaft, and is configured to support the workpiece W so as to be rotatable from the opposite side to the main shaft 5A.

  The NC device (not shown) includes a computer numerical control (CNC) device having a built-in hard disk for storing a machining program executed when the workpiece W is ground. The first moving device of the grindstone table 21 and the work table 22 The second moving device (both not shown), the grinding wheel device 3, the work support / rotation drive device 5 and the like are configured to be driven and controlled.

(Mounting method of grinding wheel)
Next, a method of attaching the grinding wheel 32 to the grinding wheel shaft 31 in the grinding machine 1 shown in the first embodiment will be described with reference to FIGS. 4 (a) and 4 (b).

  FIG. 4 is a cross-sectional view for explaining a method for mounting the grinding wheel in the grinding machine according to the first embodiment of the present invention, and FIG. 4 (a) is a cross-sectional view showing a state before the mounting in the grinding wheel. FIG. 4 and FIG. 4B are cross-sectional views showing a state after mounting in the grinding wheel. Note that the grinding wheel 32 and the spring 41 / spring stopper 42 are removed from the grinding wheel shaft 31.

  First, from the state shown in FIG. 4A, the grinding wheel 32 is positioned in the circumferential direction by the first positioning portion 4A with respect to the shaft portion 31B of the grinding wheel shaft 31. That is, the convex portions 35 and 36 of the shaft portion 31B are fitted in the concave grooves 37 and 38 of the grinding wheel 32, and the wheel stopper side end surface of the grinding wheel 32 (wheel 32A) is brought into contact with the wheel stopper 34 to thereby grind the grinding wheel shaft. A grinding wheel 32 is held at 31 (shaft portion 31B). In this case, when the grinding wheel 32 is held by the grinding wheel shaft 31, a part (shaft portion 31C) of the grinding wheel shaft 31 is inserted into the grinding wheel 32 and exposed to the side opposite to the wheel stopper.

Next, as shown in FIG. 4B, the grinding wheel 32 is positioned in the axial direction by the second positioning portion 4 </ b> B with respect to the grinding wheel shaft 31. That is, after holding the spring 41 at the insertion end (shaft portion 31C) of the grindstone shaft 31, the spring stopper 42 and the grinding wheel 32 (wheel 32A) are screwed onto the male screw portion 31c of the shaft portion 31C. The spring 41 is mounted in the middle. In this case, when the spring 41 is elastically mounted between the spring stopper 42 and the grinding wheel 32, the grinding wheel 32 (wheel 32 </ b> A) is pressed against the wheel stopper 34.
In this way, the grinding wheel 32 can be reliably attached to the grinding wheel shaft 31.

(Effects of the first embodiment)
According to the mounting structure of the grinding wheel 32 of the first embodiment, the grinding wheel 32 is attached to the grinding wheel shaft 31 in the circumferential direction by the first positioning portion 4A and the second grinding wheel 32 on the grinding wheel shaft 31. The positioning is performed by positioning in the axial direction by the positioning unit 4B. Accordingly, since it is possible to reliably prevent the grinding wheel 32 from being displaced in the rotational direction and the axial direction due to grinding resistance or the like, the bolts at a plurality of locations conventionally required when the grinding wheel 32 is attached to the grinding wheel shaft 31 are provided. Fastening can be made unnecessary, and simplification of the mounting operation of the grinding wheel 32 and its automation can be achieved.

  In addition, in 1st Embodiment, although the case where the convex parts 35 and 36 were each provided in the grindstone axis | shaft 31, and the concave grooves 37 and 38 were provided in the grinding wheel 32, this invention is not limited to this, A concave portion (including a notch) may be provided on the grindstone shaft 31, and a convex portion may be provided on the grinding wheel 32. Further, the convex portions 35 and 36 may be constituted by keys, pins, splines, and the like. That is, in short, in the present invention, the first positioning portion 4A is provided between the outer peripheral surface of the grinding wheel shaft 31 and the inner peripheral surface of the grinding wheel 32, and each includes a concave / convex portion that fits each other. That's fine.

(Second Embodiment)
FIG. 5 is a cross-sectional view showing a grinding wheel mounting structure according to the second embodiment of the present invention. FIG. 6 is a cross-sectional view for explaining the approach / separation operation of the second shaft accompanying the attachment / detachment of the grinding wheel in FIG. 5. Fig.6 (a) is sectional drawing which shows the state before attachment of the grinding wheel with respect to a grindstone axis | shaft. FIG.6 (b) is sectional drawing which shows the state after attachment of the grinding wheel with respect to a grindstone axis | shaft. 5 and 6, members that are the same as or equivalent to those in FIG. 2 are given the same reference numerals, and detailed descriptions thereof are omitted.

  As shown in FIG. 5, the mounting structure of the grinding wheel 32 shown in the fifth embodiment is a grinding wheel in which a first shaft 501 and a second shaft 502 are detachably coupled by a connecting means (not shown). A feature is that the shaft 31 is provided.

  The first shaft 501 is rotatably supported on the grindstone table 21 via a first bearing 503 and a third bearing 504, and the second shaft 502 is rotatably supported via a second bearing 505. The first bearing 503 and the second bearing 505 are formed by a sliding bearing (radial bearing) such as a fluid bearing, and the third bearing 504 is formed by a rolling bearing (thrust bearing).

  The first shaft 501 is formed by a stepped shaft having two shaft portions 501A and 501B having different outer diameters.

  The outer diameter of the shaft portion 501A is set to be larger than the outer diameter of the shaft portion 501B. A pulley 506 positioned between the first bearing 503 and the third bearing 504 is fixed on the shaft portion 501A. Thereby, the rotational driving force from the rotational driving device (the rotational driving motor of the grinding wheel device 3) is transmitted to the pulley 506 via the transmission belt 507, and the first shaft 501 is rotationally driven by the rotation of the pulley 506. A wheel stopper 508 for restricting the movement of the grinding wheel 32 toward the pulley is provided at the peripheral edge of the end surface on the side opposite to the pulley of the shaft portion 501A.

  The shaft portion 501B functions as a connecting convex portion corresponding to the connecting concave portion 502A of the second shaft 502, and is provided integrally with the central portion of the end surface on the side opposite to the pulley of the shaft portion 501A. The shaft portion 501B is configured to rotatably connect the second shaft by appropriate means and to hold the grinding wheel 32 and the spring 41. Between the outer peripheral surface of the shaft portion 501B and the inner peripheral surface of the grinding wheel 32, the first positioning portion 4A (not shown in FIG. 5) shown in the first embodiment is disposed. As a result, the grinding wheel 32 on the grinding wheel shaft 31 (shaft portion 501B) is positioned in the circumferential direction.

  The second shaft 502 is formed by a shaft having the same outer diameter as that of the shaft portion 501A. And it is comprised so that it may advance / retreat with respect to the grindstone base 21 along the 1st axis | shaft 501 with the 2nd bearing 505 between the position shown with a continuous line in FIG. 5, and the position shown with a dashed-two dotted line in FIG.

  Therefore, in order to make the second shaft 502 approach the first shaft 501, the grinding wheel 32 and the spring 41 are held on the first shaft 501 (shaft portion 501B), and then the second bearing 505 is moved as shown in FIG. ) From the retracted position shown in FIG. 3A toward the first axis 501 together with the second axis 502. In order to separate the second shaft 502 from the first shaft 501, the second bearing 505 is moved together with the second shaft 502 from the advancing position shown in FIG. The first shaft 501 is retracted. Thereby, when exchanging the grinding wheel 32, the second shaft 502 is moved in the direction away from the first shaft 501 together with the second bearing 505, and a space for exchanging the grinding wheel 32 is provided as the first shaft 501 and the second shaft. 502 can be secured.

  The second shaft 502 is provided with a connecting recess 502A that opens at the center of the end surface on the first shaft connection side and fits with the shaft portion 501B. A spring stopper 502 </ b> B that restricts the movement of the spring 41 in the direction to release the pressure contact of the grinding wheel 32 is provided at the peripheral portion of the first shaft coupling side end surface of the second shaft 502. The spring stopper 502B is configured to function as the second positioning portion 4B together with the spring 41. As a result, the grinding wheel 32 on the grinding wheel shaft 31 (shaft portion 502) is positioned in the axial direction in a state of being pressed against the wheel stopper 508.

  With the above configuration, in the mounting structure of the grinding wheel 32 according to the fifth embodiment, the grinding wheel 32 is attached to the grinding wheel shaft 31 in the circumferential direction by the first positioning portion 4A. In addition, the positioning is performed by positioning in the axial direction by the second positioning portion 4B.

  In the second embodiment, the first bearing 503 and the second bearing 505 are constituted by fluid bearings, and the third bearing 504 is constituted by a rolling bearing. However, these may be constituted by other types of bearings.

(Effect of the second embodiment)
According to the second embodiment, since it is possible to reliably prevent the grinding wheel 32 from being displaced in the rotational direction and the axial direction due to grinding resistance or the like, this is conventionally required when the grinding wheel 32 is attached to the grinding wheel shaft 31. As in the first to fourth embodiments, the bolt tightening at a plurality of locations can be made unnecessary, and the mounting operation of the grinding wheel 32 and the simplification of its automation can be achieved.

The top view which shows the grinding machine provided with the attachment structure of the grinding wheel which concerns on the 1st Embodiment of this invention. Sectional drawing which shows the attachment structure of the grinding wheel which concerns on the 1st Embodiment of this invention. III-III sectional drawing of FIG. Sectional drawing shown in order to demonstrate the attachment method of the grinding wheel in the grinding machine which concerns on the 1st Embodiment of this invention. Sectional drawing which shows the attachment structure of the grinding wheel which concerns on the 2nd Embodiment of this invention. Sectional drawing shown in order to demonstrate the approach / separation operation | movement of the 2nd axis | shaft accompanying attachment / detachment of the grinding wheel in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cylindrical grinder, 2 ... Bed, 3 ... Grinding wheel apparatus, 4 ... Positioning means, 4A ... 1st positioning part, 4B ... 2nd positioning part, 5 ... Work support and rotation drive device, 5A ... Main spindle base, 5B DESCRIPTION OF SYMBOLS ... Tailstock, 21 ... Grinding wheel stand, 22 ... Work table, 31 ... Grinding wheel shaft, 31A-31C ... Shaft part, 31c ... Male screw part, 32 ... Grinding wheel, 32A ... Wheel, 32B ... Abrasive layer, 33 bearing body , 34: wheel stopper, 35, 36 ... convex portion, 37, 38 ... concave groove, 41 ... spring, 42 ... spring stopper, 51 ... main shaft, 52 ... center, 501 ... first shaft, 501A, 501B ... shaft portion, 502 ... second shaft, 502A ... connection recess, 502B ... spring stopper, 503 ... first bearing, 504 ... third bearing, 505 ... second bearing, 506 ... pulley, 507 ... transmission belt, 508 ... wheel strike Pa, W ... work

Claims (7)

A grindstone shaft that has a wheel stopper at one end and can be rotated by a rotation drive device;
An annular grinding wheel that is held at the wheel stopper side end of the grinding wheel shaft and grinds the workpiece,
A structure in which the grinding wheel is attached to the grinding wheel shaft by being pressed against the wheel stopper,
Positioning means having a first positioning portion for positioning the grinding wheel in the circumferential direction with respect to the grinding wheel shaft, and a second positioning portion for positioning the grinding wheel in the axial direction with respect to the grinding wheel shaft. A grinding wheel mounting structure characterized by comprising: A grinding wheel shaft comprising a first shaft with a wheel stopper that is rotatably supported by the grinding wheel platform and that can be rotationally driven by a rotational driving device, and a second shaft that is detachably coupled to the wheel stopper side end portion of the first shaft;
An annular grinding wheel that is held at the wheel stopper side end of the first shaft and grinds the workpiece,
A structure in which the grinding wheel is attached to the grinding wheel shaft by being pressed against the wheel stopper,
Positioning means having a first positioning portion for positioning the grinding wheel in the circumferential direction with respect to the grinding wheel shaft, and a second positioning portion for positioning the grinding wheel in the axial direction with respect to the grinding wheel shaft. A grinding wheel mounting structure characterized by comprising: The first shaft and the second shaft are rotatably supported on the grindstone table via a first bearing and a second bearing, respectively.
3. The grinding wheel mounting structure according to claim 2, wherein the second bearing of the two bearings is disposed on the grinding wheel base so as to be able to advance and retreat along the first axis together with the second axis.   The said 1st positioning part is provided between the outer peripheral surface of the said grindstone axis | shaft, and the internal peripheral surface of the said grinding wheel, and each consists of a concave and convex part which mutually fits. The grinding wheel mounting structure described in 1.   The first positioning portion according to any one of claims 1 to 3, wherein the first positioning portion includes a coupling member that is provided with a recess in the outer peripheral portion of the grinding wheel shaft and the inner peripheral portion of the grinding wheel, and that fits into the concave portion. The mounting structure of the described grinding wheel.   The said 2nd positioning part has a spring which press-contacts the said grinding wheel with the said wheel stopper, and a spring stopper which controls the movement of the said spring to the direction which cancels | releases the press-contact of the said grinding wheel. 2. A grinding wheel mounting structure according to claim 1. A grindstone shaft that is rotatably supported on the grindstone table and can be driven to rotate by a rotation driving device;
In a grinding machine provided with a grinding wheel device attached to the grinding wheel shaft and having an annular grinding wheel for grinding a workpiece,
The grinding machine according to any one of claims 1 to 6, wherein the grinding wheel is attached to the grinding wheel shaft.