JPH10156713A - Wheel spindle tilting device of surface grinding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheel spindle tilting device of a surface grinding machine, which can be miniaturized as a whole, allows easily adjusting the angle of a wheel spindle, allows reducing changes in the cutting direction of a wheel surface before and after this adjustment, and allows easily calculating the amount of tilting of the wheel spindle. SOLUTION: This wheel spindle tilting device for a surface grinding wheel includes a wheel spindle 2 having a grinding wheel 1 at its end, a wheel spindle case 3 against which the wheel spindle 2 is freely rotationally supported, and a wheel spindle stock 14 supporting the wheel spindle case 3. A spherical seat 16, whose spherical center 0 is located on the axis of the wheel spindle 2 and roughly coincides with the wheel surface 1a of the grinding wheel 1, is provided between the wheel spindle case 3 and the wheel spindle stock 14, and a first energizing means 28 is provided for energizing time wheel spindle case 3 in the direction of its axis toward the wheel spindle stock 14 so that the wheel spindle case 3 abuts to the wheel spindle stock 14 via the spherical seat 16. Second energizing springs, provided on the wheel spindle stock 14 and energizing the wheel spindle case 3 toward its radial center, and pressure means provided on the wheel spindle stock 14 in such a way as to freely move back and forth in the radial direction and pressing the wheel spindle case 3 toward the second energizing means, are provided by the respective required numbers along the circumferential direction of the wheel spindle stock 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grindstone axis tilting device for a surface grinder.

[0002]

2. Description of the Related Art In an opposed biaxial surface grinder such as a vertical type or a horizontal type, and other surface grinders, the degree of parallelism of a facing surface of a grindstone is obtained, or the grindstone surface of a grindstone is made parallel to a grinding surface of a work. Or, equipped with a grinding wheel axis tilting device to tilt,
The grindstone shaft inclining device allows the grindstone shaft to be appropriately inclined as needed. Conventionally, this grindstone axis inclining device includes a device in which a column, a grindstone table, etc. are tilted to incline the grindstone shaft, and a device in which a spherical seat is used to incline the grindstone shaft around its center point. is there.

[0003] A grindstone shaft inclining device in which a column or the like is inclined to incline a grindstone shaft is disclosed in Japanese Patent Publication No. 60-2666.
As described in Japanese Patent Publication No. 9, a column for supporting a grinding wheel shaft is disposed on a lower support, and one end of the column is supported on the lower support via a fulcrum so as to be tiltable, The other end side is provided with an inclination angle adjusting means. When adjusting the tilt amount of the grinding wheel shaft, the entire column is tilted around the fulcrum by the tilt angle adjusting means.

As described in Japanese Patent Application Laid-Open No. Sho 62-54667, the latter grindstone shaft inclining device using a spherical seat is provided with a grindstone shaft having a grindstone rotatably in a grindstone shaft case. Fixing means for providing a pair of front and rear spherical seats having a common spherical center between a shaft case and a grindstone headstock supporting the same, and pressing the spherical seats to fix the grindstone shaft case to the grindstone headstock. A biasing spring for biasing the grinding wheel shaft case in the axial direction, and a plurality of adjustments that are screwed radially to the grinding wheel shaft base side in a radial direction and whose tip abuts on the grinding wheel shaft case side. And a screw.

When adjusting the inclination amount of the grinding wheel shaft, the grinding wheel shaft case is pressed by the respective adjusting screws while rotating and moving the respective adjusting screws, and the grinding wheel shaft case is spherically moved in the grinding wheel shaft base. The seat is tilted integrally around the center point.

[0006]

The former device has a disadvantage that the whole device becomes large, but the latter device can be downsized by tilting the grindstone shaft case within the grindstone headstock, so that the former device can be downsized. There is an advantage that the disadvantage of can be solved. But,
In the conventional grindstone axis tilting device, in both the former and latter cases, the fulcrum position at the time of adjustment is far away from the center of the grindstone surface, so the height of the grindstone surface before and after the adjustment, that is, in the cutting direction, There is a disadvantage that the position changes greatly.

[0007] For example, in the case of the latter device, the structure is relatively simple, but the center of each spherical seat is located on the axis of the grinding wheel shaft and at the tip end thereof. Is separated by the size of For this reason, when the inclination of the grinding wheel is changed by inclining the grinding wheel axis, there is a problem that the position of the grinding wheel surface largely changes in the cutting direction, and as a result, there is a disadvantage that the calculation of the amount of inclination becomes troublesome.

Moreover, the latter device has a drawback that the grinding wheel shaft case does not tilt following the movement of each adjusting screw and that the adjusting screw must be tightened after the adjustment, so that the operation at the time of adjustment becomes complicated. In view of the conventional problems, the present invention can reduce the size of the entire apparatus, easily adjust the angle of the grinding wheel shaft, reduce the change in the cutting direction of the grinding wheel surface before and after the adjustment, and furthermore, reduce the grinding wheel shaft. An object of the present invention is to provide a grindstone axis tilting device for a surface grinding machine that can easily calculate a tilt amount.

[0009]

According to the first aspect of the present invention, there is provided a grindstone shaft having a grindstone at a tip, a grindstone shaft case rotatably supporting the grindstone shaft, and a grindstone shaft supporting the grindstone shaft case. A base is provided, and between the grindstone shaft case and the grindstone shaft stand, a spherical seat whose spherical center is on the axis of the grindstone shaft and substantially coincides with the grindstone surface of the grindstone is provided, and the grindstone shaft case is provided via the spherical seat. A first urging means for urging the grinding wheel shaft case in the axial direction toward the grinding wheel head side so as to abut on the grinding wheel head side is provided, and the first biasing means is provided on the grinding wheel head side and the grinding wheel shaft case is disposed in the radial direction. A second urging means for urging toward the center and a pressing means provided on the grindstone headstock side so as to be able to advance and retreat in the radial direction and pressing the grindstone shaft case toward the second urging means side are provided around the grindstone headstock. The required number is arranged in the direction.

According to a second aspect of the present invention, in the first aspect of the present invention, a spherical seat is arranged on the grindstone side of the grindstone headstock,
The first urging means, the second urging means, and the pressing means are arranged on the opposite side of the grindstone headstock from the grindstone. According to a third aspect of the present invention, in the first or second aspect of the present invention, an adjusting screw is used as the pressing means, and an adjusting motor for driving the adjusting screw in a normal or reverse direction is provided.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 to 3 show an example of a grindstone shaft inclining device in a horizontal surface grinder, wherein 1 is a grindstone, 2 is a grindstone shaft, and a grindstone 1 is detachably mounted on the front end of the grindstone shaft 2. 3 is a grinding wheel shaft case.
The grindstone shaft 2 is rotatably held around the axis through bearings 4 and 5 therein. In addition, the grinding wheel shaft case 3 is integrally provided with a large-diameter portion 6 at the front end on the grinding wheel 1 side, and a large-diameter disk-shaped shielding plate 7 is fixed to the large-diameter portion 6. It is designed to block foreign objects.

Reference numeral 8 denotes a drive shaft. The drive shaft 8 is disposed on the axis of the grindstone shaft 2 on the side opposite to the grindstone 1 and is rotatably supported by a drive shaft case 9 via bearings 10 and 11. And is connected to the grindstone shaft 2 via a shaft joint 12. The drive shaft case 9 is detachably fixed to the grindstone shaft case 3 by bolts 13. Reference numeral 14 denotes a grindstone headstock, which is provided with a cylindrical support case 15 whose front and rear ends in the axial direction are open, and the grindstone shaft case 3 and the drive shaft case 9 are loosely fitted in the support case 15 with a predetermined gap therebetween. Has been inserted. The grinding wheel shaft case 3 is in contact with the front end of the supporting case 15 on the grinding wheel 1 side via a spherical seat 16 so as to be tiltable.

The spherical seat 16 includes a spherical contact seat 17 and a spherical receiving seat 18.
The spherical bearing seat 17 and the spherical receiving seat 18 have a spherical center O on the axis of the grinding wheel shaft 2 and the grinding wheel 1
Is formed in a spherical shape so as to substantially coincide with the grindstone surface 1a. The spherical abutment 17 is located on the opposite side of the shielding plate 7
The spherical receiving seat 18 is formed on the inner peripheral side of the supporting case 15 in correspondence with the spherical contact seat 17. The support case 15 has an outer fitting portion 19 which is fitted around the outer periphery of the large diameter portion 6 with a small gap so as to be relatively rotatable.
It is formed closer to the front end than 18. The distal end side of the outer fitting portion 19 is shielded by the shielding plate 7 so that foreign matter hardly enters the spherical seat 16 side.

Numeral 20 denotes a grindstone drive motor, which drives the drive shaft 8 via a belt transmission mechanism 21 by the grindstone drive motor 20. The belt transmission mechanism 21 includes a drive pulley 23 fixed to a rotation shaft 22 of the grinding wheel drive motor 20, and a drive shaft
8 and the driven pulleys 24,
, And is provided in a transmission case 26. Transmission case 26 is a whetstone shaft case
The support plate 27 is fixed to the rear end of the grindstone shaft case 3 by bolts 13. The grindstone drive motor 20 is fixed to the support plate 27.

Reference numeral 28 denotes an urging spring which constitutes first urging means.
At the end opposite to the whetstone 1, a plurality, for example, three, are arranged at equal intervals in the circumferential direction on the support case 15. That is, on the rear end side of the support case 15, a housing recess 29 opening toward the transmission case 26 is formed in parallel with the axis of the grinding wheel shaft 2. 30 and this pressing body
An urging spring 28 for urging the transmission case 26 toward the transmission case 26 in the axial direction is housed therein. On the other hand, on the support plate 27 side of the transmission case 26, adjustment bolts 31 corresponding to the respective pressing bodies 30 are screwed so as to be adjustable in the axial direction. The biasing spring 28, the pressing body 30, and the adjusting bolt 31 allow the grinding wheel shaft case 3 to abut the support case 15 via the spherical seat 16, so that the grinding wheel shaft 2 Is biased in the axial direction. Of the three housing recesses 29, one upper housing recess 29 is formed on a hanging member 32 fixed to the upper surface on the rear end side of the support case 15, and the other two housing recesses 29 It is formed integrally with the support case 15. Hanging members 33 are provided at both ends of the hanging member 32. A disc spring is used as the biasing spring 28.

Numeral 34 designates an adjusting spring which constitutes second urging means for urging the grinding wheel shaft case 3 toward the center in the radial direction, and numeral 35 constitutes a pressing means which presses the grinding wheel shaft case 3 at the inner end side. Adjustment screw. The adjusting spring 34 and the adjusting screw 35 are located on the rear side of the center of the support case 15 in the axial direction, that is, the transmission case.
On the 26 side, two adjusting springs 34 and adjusting screws 35 are radially arranged at equal intervals in the circumferential direction so as to face each other across the grinding wheel shaft case 3.

The support case 15 has two receiving holes 36 for adjusting springs 34 on the lower side and two screw holes 36 for adjusting screws 35 on the upper side.
37 are formed in the radial direction, respectively. And each accommodation hole
36 has a pressing body 38 slidable in the radial direction,
A plug 39 is provided to close the outer end and guide the pressing body 38 in the radial direction, and adjust the pressing body 38 between the plug 39 and the pressing body 38 so as to urge the pressing body 38 toward the grindstone shaft case 3. A spring 34 is interposed. The tip of each pressing body 38 is formed in a spherical shape, and the abutting body with which the inner end of each pressing body 38 contacts the grinding wheel shaft case 3.
Forty are provided. A disc spring is used for the adjusting spring.

Each adjusting screw 35 is provided with a screw hole 37 of the support case 15.
And is connected to the rotating shaft 42 of the adjusting motor 41 via a shaft joint 44 outside the support case 15. The adjustment motor 41 drives the adjustment screw 35 in the forward and reverse directions, and is fixed to the outside of the support case 15 via the mounting base 43. The adjustment motor 41 has an adjustment screw
A pulse motor is used so that the number of rotations of 35 can be easily controlled.

In the grindstone shaft inclining device having the above-described structure, the grindstone shaft case 3 has a spherical seat 17 of a spherical seat 16 and a spherical receiving seat 18.
The three urging springs 28 are axially urged so as to abut against the side, and the adjusting screw 35 and the pressing body 38 arranged in the radial direction abut on the outer periphery of the grinding wheel shaft case 3.
3 is pressed against the two adjusting screws 35 by the two adjusting springs 34, so that the grinding wheel shaft case 3 can be securely fixed in the support case 15 with the grinding wheel shaft 2 at a predetermined angle. Therefore, the belt drive mechanism 21 and the drive shaft
When the grinding wheel shaft 2 is driven via the wheel 8, the grinding wheel shaft 2 rotates around the axial direction in the grinding wheel shaft case 3, so that the grinding wheel 1 at the front end of the grinding wheel shaft 3 is revolved while rotating, and is rotated by the grinding wheel 1. Work can be ground.

When the degree of parallelism of the facing surface of the grinding wheel 1 is determined, or when the grinding surface of the grinding wheel 1 is parallel or inclined with respect to the grinding surface of the workpiece, the grinding wheel shaft case 3 is placed around the spherical center O of the spherical seat 16. The angle of the grinding wheel shaft 2 is adjusted by tilting.
When tilting the grinding wheel shaft 2, two adjusting motors 41 are operated in accordance with the amount of tilt of the grinding wheel shaft 2. The adjusting screw 35 to be screwed is moved forward and backward with respect to the grinding wheel shaft 2.

Then, the spherical bearing seat 17 on the grinding wheel shaft case 3 side is moved by the spring force of the biasing spring 28 to the spherical receiving seat on the support case 15 side.
In the state pressed by 18, the spherical bearing seat 17 of the grinding wheel shaft case 3 relatively slides with respect to the spherical receiving seat 18, and the grinding wheel shaft case 3 Tilt around.

For example, when each adjusting screw 35 is advanced toward the grindstone shaft case 3, the adjusting screw 35 presses the grindstone shaft case 3, so that the pressing body 38 retreats against the adjusting spring 34,
The grinding wheel shaft case 3 is adjusted around the spherical center O of the spherical seat 16.
Tilt to 34 side. When each adjusting screw 35 is retracted from the grinding wheel shaft case 3 side, each pressing body 38 is advanced to the grinding wheel shaft case 3 side by the adjusting spring 34, and the grinding wheel shaft case 3 is adjusted around the spherical center O of the spherical seat 16 around the spherical center O. Incline to 35 side.

Therefore, if the two adjustment motors 41 are rotated forward or backward as appropriate to move the respective adjustment screws 35 forward and backward, the grinding wheel shaft case 3 in the support case 15 moves around the spherical center O of the spherical seat 16 360 degrees. The grindstone shaft 2 can be freely tilted in any direction within the range of degrees, and the amount of inclination of the grindstone shaft 2 can be easily adjusted while miniaturizing the entire apparatus.

In particular, since the spherical center O of the spherical seat 16 is substantially coincident with the center of the grinding wheel shaft 2 and the grinding wheel surface 1a of the grinding wheel 1, the grinding wheel shaft 2 is inclined to change the inclination of the grinding wheel 1. In this case as well, the grinding wheel surface 1a of the grinding wheel 1 does not greatly change in the axial direction of the grinding wheel shaft 2, and the change in the cutting direction of the grinding wheel surface 1a can be reduced. Easy.

The adjusting spring 34 and the adjusting screw 35 are arranged so as to correspond to each other in the radial direction with the grinding wheel shaft case 3 interposed therebetween.
Since two sets of the adjusting screw 35 and the adjusting screw 35 are radially arranged on the support case 15 side at equal intervals in the circumferential direction, the grinding wheel shaft case 3 can freely follow the advance and retreat of each adjusting screw 35.
Therefore, by moving a plurality of adjustment screws forward and backward,
There is an advantage that the adjustment operation is very easy as compared with the related art in which the angle of the grinding wheel is adjusted, and the angle adjustment of the grinding wheel shaft 2 can be performed easily, quickly, and reliably.

Further, the angle of the grinding wheel shaft 2 is adjusted by moving the adjusting screw 35 forward and backward. Since the spring force of the adjusting spring 34 is applied to the adjusting screw 35 via the grinding wheel shaft case 3, vibration and the like after the adjustment are performed. The adjustment screw 35 can be reliably prevented from being loosened due to the above, and the angle of the grinding wheel shaft 2 does not change after the adjustment.

In addition, an adjusting motor 41 is provided for each adjusting screw 35, and the adjusting screw 35 is rotated in the forward or reverse direction by the adjusting motor 41, so that the adjusting screw 35 can easily move forward and backward during adjustment. If a method such as controlling the adjustment motor 41 by remote control is adopted, adjustment can be easily made even from a remote position. In particular, if a pulse motor is used for the adjustment motor 41, the amount of advance and retreat of the adjustment screw 35 can be finely adjusted, and the grinding wheel shaft 2
Angle can be adjusted with high precision.

The spherical seat 16 is located at the end of the support case 15 on the side of the grindstone 1. The biasing spring 28, the adjusting spring 34 and the adjusting screw 35 are provided on the opposite side of the support case 15 from the grindstone 1. 16
Side, and the distance between the biasing spring 28, the adjusting spring 34, and the adjusting screw 35 can be increased, the operation of the adjusting screw 35 can be easily performed, and the spring force of each spring 28, 34 can be relatively reduced. It is easy to reduce the size.

The spherical seat 16 is located inside an outer fitting portion 19 which is fitted to the large diameter portion 6 of the grinding wheel shaft case 3, and the gap between the outer fitting portion 19 and the large diameter portion 6 is reduced. Since the large-diameter shielding plate 7 is provided on the opening end side of the outer fitting portion 19, the spherical seat 16 can be reliably protected from coolant or the like containing foreign matter, and wear of the spherical seat 16 due to foreign matter being caught can be reduced. . In addition, since the adjustment motor 41 is separated from the grindstone 1 side, the adjustment motor 41 can be easily and reliably protected from coolant and the like.

Although the embodiment of the present invention has been described in detail, the present invention is not limited to this embodiment.
For example, in the embodiment, a cylindrical support case 15 is provided on the grindstone headstock 14 side, and a spherical seat 16 is provided on the grindstone 1 side of the support case 15.
The biasing spring 28, the adjusting spring 34 and the adjusting screw 35 are provided on the opposite side, respectively. However, these may be provided on the grindstone headstock 14 via separate supports.

The urging spring 28, the adjusting spring 34, and the adjusting screw 35
It is desirable to arrange a plurality of them at equal intervals in the circumferential direction, but the intervals may be slightly different as long as the balance is not impaired. It is sufficient if the number of the urging springs 28, the adjusting springs 34, and the adjusting screws 35 is plural, and the number of the urging springs 28 and the number of the adjusting springs 34 and the adjusting screws 35 are not limited to two. Further, the adjusting spring 34 and the adjusting screw 35 do not necessarily need to be arranged to face each other with the grinding wheel shaft case 3 interposed therebetween.
A motor other than the pulse motor may be used as the adjustment motor 41.

As the first urging means, an air cylinder, a hydraulic cylinder or the like may be used instead of the urging spring 28. The second urging means may be constituted by an adjusting spring 34, or may be an air cylinder, a hydraulic cylinder, or the like, like the first urging means. The pressing means may be constituted by something other than the adjusting screw 35. If it is a surface grinder, it can be carried out similarly regardless of a vertical type, a horizontal type, a facing biaxial type, or the like. In addition, it goes without saying that various design changes and modifications can be made without departing from the spirit of the present invention.

[0033]

According to the first aspect of the present invention, there is provided a grinding wheel shaft having a grinding wheel at the tip, a grinding wheel shaft case rotatably supporting the grinding wheel shaft, a grinding wheel head supporting the grinding wheel shaft case. A grinding wheel shaft case is provided between the grinding wheel spindle head and the grinding wheel spindle base, and a spherical center whose spherical center is on the axis of the grinding wheel shaft and substantially coincides with the grinding wheel surface of the grinding wheel is provided. A first urging means for axially urging the grindstone shaft case toward the grindstone headstock so as to abut on the grindstone shaft case is provided. A second urging means for urging the whetstone, and a pressing means provided on the grindstone headstock side so as to be able to advance and retreat in the radial direction and pressing the whetstone shaft case toward the second urging means in the circumferential direction of the grindstone headstock. Since the required number is arranged, the whole device can be miniaturized, the angle of the grinding wheel axis can be easily adjusted, and the Possible to reduce the direction of change cut of the grinding wheel surface before and after the integer, yet can be easily calculated slope of the grinding wheel axis and the change in angle of the wheel shaft can be prevented after the adjustment.

According to the invention described in claim 2, according to claim 1
In the invention described in the above, since the spherical seat is arranged on the grindstone side of the grindstone headstock, the first urging means, the second urging means and the pressing means are arranged on the opposite side of the grindstone of the grindstone headstock, Spherical seat side,
The distance between the first urging means, the second urging means and the pressing means can be increased, the operation of the pressing means is easy, and the urging force of each urging means can be relatively small, so that the overall size can be reduced. Easy. According to the invention described in claim 3, in the invention described in claim 1 or 2, an adjusting screw is used for the pressing means,
Since the adjusting screw for driving the adjusting screw in the forward and reverse directions is provided, the adjusting screw can be easily operated at the time of adjustment, and adjustment by remote control or the like is also possible.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a grindstone axis tilting device showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

[Explanation of symbols]

 1 Whetstone 2 Whetstone shaft 3 Whetstone shaft case 8 Drive shaft 14 Whetstone shaft stand 15 Support case 16 Spherical seat 28 Urging spring (first urging means) 34 Adjusting spring (second urging means) 35 Adjusting screw (pressing means)

Claims (3)

[Claims] A whetstone shaft having a whetstone at a tip thereof; a whetstone shaft case rotatably supporting the whetstone shaft; and a whetstone headstock supporting the whetstone shaft case. Between the center of the grinding wheel axis and substantially coincide with the grinding wheel surface of the grinding wheel, such that the grinding wheel shaft case is in contact with the grinding wheel head side through the spherical seat, First biasing means for biasing the case axially toward the grindstone headstock side, second biasing means provided on the grindstone headstock side and biasing the grindstone shaft case toward its radial center; The grindstone shaft case is provided on the grindstone headstock side so as to be able to advance and retreat in the radial direction.
A grindstone shaft inclining device for a surface grinder, wherein a required number of pressing means for pressing the urging means are arranged in the circumferential direction of the grindstone headstock. 2. A grinding wheel spindle head, wherein a spherical seat is arranged on the grindstone side, and a first urging means, a second urging means, and a pressing means are arranged on the opposite side of the grindstone headstock from the grindstone. The grindstone axis tilting device for a surface grinding machine according to claim 1. 3. The grindstone shaft inclining device for a surface grinding machine according to claim 1, wherein an adjusting screw is used as the pressing means, and an adjusting motor for driving the adjusting screw in a forward / reverse direction is provided.