JP2002307270A - Vertical type double-end surface grinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vertical type double-end surface grinder arranged so that the degree of parallelism of the grinding surface of a lower grinding wheel with the end face of a work fixed to a fixing jig of a turntable can be adjusted simply even in the condition that the axis of grinding wheel lies out of align ment. SOLUTION: The vertical type double-end surface grinder is equipped with a pair of grinding wheels 2 and 3 mating above and below while they are fixed to a pair of vertical shafts 4 and 5 and the turntable 15 to hold the work W and supply to the grinding position A1 between the grinding wheels 2 and 3, wherein the table 15 is furnished thereon with a work fixing jig 17 having a rotary shaft 63 to fix the work W to a specified position and allow it to rotate around its own axis. A bed 14 to support the table 15 and its driving mechanism is supported by a plurality of support legs 12 whose heights are adjustable, and thereby the fore-and-aft and left-and-right inclining angles with respect to the horizontal are made adjustable, and the legs 12 are installed upright on a slide table 11 which is slidable in the horizontal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention comprises a pair of grinding wheels opposed to each other up and down, and fixes a workpiece to a workpiece fixing jig provided on a rotary table, and supplies the workpiece to a grinding position between the grinding wheels. The present invention relates to a vertical double-sided surface grinder for simultaneously grinding both upper and lower surfaces of a work while rotating the work around the axis of a fixing jig.

[0002]

2. Description of the Related Art A vertical double-sided surface grinder is provided with a work supply device suitable for the work depending on the size and type of the work, and cannot be held at a central portion unlike a piston ring, for example. In the case of a work with low rigidity, the work holding hole formed in the thin rotating carrier
2. Description of the Related Art There is applied a work supply device that holds a work so that upper and lower end surfaces thereof respectively project, and supplies the work to a grinding position between grinding wheels while rotating the work by a ring gear mechanism or the like. In addition, even if it has a high rigidity, such as a connecting rod, even a work having a complicated shape far from the rotating body is rotatably provided with the work holding hole in order to rotatably hold the work. A work supply device provided with a carrier is applied.

[0003] On the other hand, like a brake disk for an automobile, a rotating body having a wide surface to be ground and having a certain rigidity, does not bend even if it is held at a central portion. The work is provided with a work supply device that fixes a central portion of the work to a fixing jig, rotates the work with a rotation axis of the fixing jig, and supplies the work to a grinding position between grinding wheels.

Normally, both upper and lower grinding wheels of a vertical double-sided surface grinder are configured to be vertically movable, and an upper grinding wheel is provided with an adjusting mechanism for adjusting the inclination angle of its axis. It is provided and can be adjusted in parallel with the lower grinding wheel, but the axis of the lower grinding wheel is fixed in a vertical position at the time of shipment.

[0005]

Due to manufacturing errors and impacts during transportation or work, the verticality of the lower grinding wheel axis may be deviated, which may cause the level of the upper grinding surface of the lower grinding wheel to deviate. However, in the former work supply device, since the work is held in the work holding hole, there is room for the work to incline in the holding hole according to the grinding surface of the grinding wheel, thereby reducing the work grinding thickness. Can be kept like that.

However, in the latter work supply device, since the work is fixed to the rotating shaft of the fixing jig, the work does not automatically tilt to correspond to the ground surface.
The uniformity of the work grinding thickness cannot be maintained, and the grinding accuracy decreases. And if you try to fix this,
The lower grindstone shaft must be disassembled, and the verticality must be adjusted by adjusting the shim of the bearing.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to make it possible to easily adjust the horizontal posture of a work according to its inclination even if the horizontality of a lower grinding wheel, that is, the verticality of a lower grinding wheel axis is slightly wrong. Another object of the present invention is to provide a vertical double-sided surface grinder that can easily improve grinding accuracy without performing complicated shim adjustment of a grinding wheel shaft.

[0008]

According to a first aspect of the present invention, there is provided a pair of grinding wheels fixed to a pair of vertical grinding wheel shafts and vertically opposed to each other, and grinding between the grinding wheels while holding a workpiece. A vertical type double-sided surface grinding machine provided with a work fixing jig having a rotating shaft for fixing the work at a predetermined position and rotating on the table. The bed that supports the mechanism is supported by a plurality of support legs whose height can be adjusted, so that the front and rear and left and right inclination angles with respect to the horizontal can be adjusted.

According to a second aspect of the present invention, in the vertical double-sided surface grinding machine according to the first aspect, the support legs are erected on a slide base that can be adjusted to slide horizontally.

[0010]

FIG. 1 is a side view of a vertical double-headed surface grinder to which the present invention is applied. A pair of grinding wheels 2 and 3 vertically opposed to each other and a power transmission (not shown) are provided in a main body case 1. The mechanism is housed, and a work supply device 6 is installed adjacent to the main body case 1. For convenience of explanation, the following description will be made assuming that the side on which the work supply device 6 is installed is the front.

The lower grinding wheel 3 is fixed to the upper end of a vertical lower grinding wheel shaft 5, and the upper grinding wheel 2 is connected to the lower end of the upper grinding wheel 5 arranged on the same axis O1 as the lower grinding wheel axis O2. Fixed,
The two grinding wheel shafts 4 and 5 are each configured to be vertically movable by an elevating mechanism, and are connected to a power transmission mechanism so as to rotate in mutually opposite directions.

The work supply device 6 includes a base 10 supported on the floor surface and the front surface of the main body case 1, a slide table 11 supported on the base 10 so as to be slidable in the front-rear direction.
Three height-adjustable support legs 12 erected on the slide table 11, a bed 14 supported by the support legs 12,
A rotary table (index table) 15 rotatably supported by the bed 14;
It comprises a pair of work fixing jigs 17 provided above, a clamp device 20 for fixing a work W placed on the work fixing jig 17 from above, and the like.

The clamp device 20 comprises a pair of cylinders 22 having clamp rods 21 which can be extended downward. Each cylinder 22 is arranged on the same axis as the rotation axis O4 of the work fixing jig 17. And is fixed to a gate-shaped bracket 23 fixed to the upper surface of the turntable 15. By lowering the clamp rod 21, the work W on the work fixing jig 17 is pressed, and the clamp rod 2 is pressed while the work W is pressed.
Numeral 1 can rotate around the fixing jig axis O4 together with the workpiece W.

A protective cover 2 is provided around the rotary table 15.
5 are arranged and fixed to the front surface of the main body case 1.

FIG. 2 is a front view (front view) of FIG.
The slide table 11 is slidably supported only in the front-rear direction by contacting the slopes of the guide rails 26 with the slopes formed at the left and right ends of the slide table 11. Although not shown, the slide table 11 can be fixed at any position in the front-rear direction by a lock bolt mechanism.

FIG. 3 is an enlarged plan view of FIG. 2, in which the bed 14 is formed in a rearward U-shape as viewed from above, and the three support legs 12 are provided at the front end of the bed 14 in the left-right direction. It is arranged at the center and at both left and right ends of the rear end.

Both work fixing jigs 17 are provided with a table shaft O3.
Are arranged at a phase difference of about 180 °, and when the rotary table 15 rotates half a turn, the grinding position A on the grinding wheel side is set.
1, and the position can be changed between the supply and removal position A2 on the opposite side.

FIG. 5 is an enlarged cross-sectional view taken along the line VV of FIG. 3. The bed 14 corresponding to the support leg 12 is formed in a hollow shape having a U-shaped cross section. The support leg 12 is fixed to the slide table 11. The base nut 30, a main body bolt 33 screwed to the base nut 30 in a vertical posture, an adjust nut 31 screwed into the main body bolt 33, and an abutment with the adjust nut 31 from above, and The spherical joint 32 includes a spherical joint 32 for holding the lower wall portion from above and below, and a lock nut 35 screwed above the spherical joint 32. That is, by loosening the lock nut 35 and rotating the adjustment nut 31, the spherical joint 32 is adjusted.
The support height of the bed 14 can be adjusted via the support. By adjusting the support height of each support leg 12 respectively, the inclination of the bed 14 in the front-back and left-right directions with respect to the horizontal can be adjusted. I have. The lock nut 3
Engagement holes 35a and 31a for inserting a rotary tool are formed in the adjustment nut 5 and the adjustment nut 31, respectively.

An L-shaped bracket 27 is fixed to the front end surface of the base 10, and the slide base 1 is attached to the bracket 27.
1 is supported rotatably and immovable in the axial direction. The screw shaft 28 is formed on the front wall of the slide base 11 and is screwed into a screw hole. An operation handle 29 is fixed to the front end of the control handle 29. That is, by rotating the screw shaft 28 with the operation handle 29, the slide base 11 can be moved in the front-rear direction by the screw feed action.

A vertical boss 40 is provided at the rear end of the bed 14.
The shaft portion 42 of the turntable 15 is rotatably supported by the boss portion 40 via a bearing 41. A conductive case 44 is fixed to a lower end of the boss portion 40, and an electric motor 45 is mounted on a front upper surface of the conductive case 44.
Is attached. In the transmission case 44, timing gears 51 and 52 are provided at the lower ends of the motor shaft 50 of the electric motor 45 and the shaft portion 42 of the turntable 15, respectively.
Are fixed, and a timing belt 53 is wound around the timing gears 51 and 52.

FIG. 4 is an enlarged cross-sectional view taken along the line IV-IV of FIG. 3. The work fixing jig 17 includes a cylindrical jig main body 60 fixed to the upper wall of the rotary table 15 in a vertical posture, and the jig. Body 60
A rotating shaft 63 is rotatably supported via bearings 61 and 62 so as not to move in the axial direction, and the upper end surface of the rotating shaft 63 projects upward with the same axis as the fixing jig axis O4. A positioning pin 65 is provided upright, and an annular work mount 64 is fixed.
The work W has a center hole 64a into which the boss Wa of the work W can be inserted. The diameter of the positioning pin 65 is such that the work boss Wa is fitted.

An electric motor 7 for rotating the work is placed on the rotary table 15 on the center side of the table from the work fixing jig 17.
The reduction gear 72 fixed to the motor shaft 71 of the electric motor 70 and the gear 73 provided at the lower end of the rotating shaft 63 mesh with each other in the rotary table 15. That is, the rotation of the electric motor 70 causes the rotation shaft 63 of the fixing jig 17 to rotate, whereby the work W fixed to the annular work mount 64 by the clamp rod 21 is rotated.
Are rotated (rotated) around the fixing jig axis O4.

[0023]

In FIG. 1, as described above, the rotary table 15 is used.
Is moved between the rear grinding position A1 and the front supply and removal position A2 by raising the clamp rod 21 at the supply and removal position A2. Then, the unground work W is fixed to the work fixing jig 17 by exchanging the ground work W and the unground work W and lowering the clamp rod 21. On the other hand, at the grinding position A1, the work W is rotated around the fixing jig axis O4, and the upper and lower end faces are simultaneously ground by the upper and lower rotary grinding wheels 2 and 3.

When the work exchange at the supply and removal position A2 is completed, while the work grinding at the grinding position A1 is completed, the upper and lower grinding wheels 2 and 3 are respectively moved up and down from the upper and lower end surfaces of the work W at the grinding position A1. And grinding position A1
The rotation of the fixing jig 17 is stopped, and the turntable 15 is
Rotate 80 °.

From supply and removal position A2 to grinding position A1
The unground work W that has moved to this position is rotated around the fixing jig axis O4 integrally with the rotating shaft 63 and the clamp rod 21 by the rotation of the rotating shaft 63 of the fixing jig 17 as shown in FIG. The upper and lower grinding wheels 2 and 3 respectively approach the work W in the rotating state, and grind the upper and lower end surfaces of the outer peripheral portion of the work W by a predetermined amount.

[0026]

[Inclination adjustment] In FIG. 1, the height of the three support legs 12 supporting the bed 14 is individually adjusted to adjust the inclination of the bed 14 in the front-back and left-right directions with respect to the horizontal.
Thereby, the parallelism between the lower grinding wheel axis O2, the table axis O3, and the fixing jig axis O4 is adjusted so that the upper and lower end surfaces of the work W are parallel to the upper end grinding surface of the lower grinding wheel 3. I do.

In the above inclination adjustment, ideally, it is assumed that the posture of the lower grinding wheel shaft 5 is vertical and the upper grinding surface of the lower grinding wheel 3 is horizontal. The posture of the bed 14 is adjusted so that the table axis O3 and the fixing jig axis O4 are vertical and the upper and lower end surfaces of the work are horizontal, but in reality, the lower wheel axis O2 is It is inclined within the allowable error range with respect to the vertical, and in many cases, it is inclined more than the allowable error due to vibration during transportation or impact during work. In such a case, instead of correcting the verticality of the lower grinding wheel shaft 5,
By adjusting the inclination angle of the bed 14, the table axis O3 and the fixing jig axis O4 are adjusted so as to be parallel to the lower grinding wheel axis O2, and the upper edge grinding surface of the lower grinding wheel 3 is adjusted. The upper and lower ends of the work W are set to be parallel. Also, the inclination angle of the upper grinding wheel shaft 4 is adjusted to the inclination angle of the lower grinding wheel shaft 5 such that the lower grinding surface of the upper grinding wheel 2 is parallel to the upper grinding surface of the lower grinding wheel 3. Thereby, even if the verticality of the lower grinding wheel axis O2 is out of order, the grinding wheels 2 and 3 and the work W are ground in parallel with each other, and the grinding thickness of the work W is uniform. , And accurate double-side grinding can be performed.

[0028]

[Forward / backward adjustment] When the grinding range is widened or narrowed by changing the type of work, the lock of the slide table 14 in FIG. By adjusting the direction, the work W at the grinding position A1 is set to be an optimum position with respect to the grinding wheels 2 and 3.

[0029]

As described above, according to the present invention, (1) a pair of grinding wheels 4 and 5 which are fixed to a pair of vertical grinding wheel shafts 2 and 3 and face vertically, and a work W A rotary table 15 that holds and supplies the workpiece W to a grinding position A1 between the grinding wheels 2 and 3, and has a rotary shaft 63 that fixes the workpiece W at a predetermined position and rotates on the rotary table 15. In a vertical double-sided surface grinding machine provided with a jig 17, a table 15 and a bed 14 supporting a driving mechanism thereof are supported by a plurality of support legs 12 whose height can be adjusted, so that the front and rear and left and right inclinations with respect to the horizontal can be made. Since the angle can be adjusted, even if the axis O2 of the lower grinding wheel shaft 5 is deviated from the vertical position, the grinding wheel axis O2 of the grinding wheel 3 can be adjusted.
It is not necessary to perform the troublesome work of adjusting the shim of the work W. By simply adjusting the inclination of the bed 14 on the work supply device side, the upper and lower end surfaces of the work W can be set in parallel with the grinding wheels 2, 3. Grinding accuracy can be improved by simple adjustment work. That is, the uniformity of the work grinding thickness can be maintained.

(2) If the support legs 12 are erected on the slide base 11 which can be slid in the horizontal direction, it is only necessary to adjust the slide base 11 back and forth with respect to works W of various sizes or shapes. In addition, it is possible to easily secure a grinding area corresponding to each work.

[Brief description of the drawings]

FIG. 1 is a side view of a vertical double-sided surface grinder to which the present invention is applied.

FIG. 2 is a front view of FIG.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is an enlarged cross-sectional view taken along the line IV-IV of FIG. 3;

FIG. 5 is a sectional view taken along line VV of FIG. 3;

[Explanation of symbols]

 2 Upper grinding wheel 3 Lower grinding wheel 4 Upper grinding wheel shaft 5 Lower grinding wheel shaft 10 Base 11 Slide table 12 Support leg 14 Bed 15 Rotary table 17 Fixing jig 20 Clamp device 28 Screw shaft 29 Operation handle

Claims (2)

[Claims] 1. A table comprising: a pair of grinding wheels fixed to a pair of vertical grinding wheel shafts and opposed to each other vertically; and a rotary table for holding and supplying a workpiece to a grinding position between the grinding wheels. On the top, in a vertical double-ended surface grinding machine provided with a work fixing jig having a rotation axis for fixing a work at a predetermined position and rotating, a bed supporting a table and a drive mechanism thereof is provided with a plurality of adjustable heights. A vertical double-sided surface grinding machine characterized in that the front and rear and left and right inclination angles with respect to the horizontal can be adjusted by being supported by the supporting legs. 2. The vertical double-sided surface grinding machine according to claim 1, wherein said support legs are erected on a slide table which can be slid in a horizontal direction.