KR20040032567A - Vertical type of double disc surface grinding machine - Google Patents

Abstract

PURPOSE: A vertical duplex head surface grinding machine is provided to simply improve the grinding accuracy without a shim control by simply adjusting the horizon of a workpiece. CONSTITUTION: A table(15) and a bed to support a driving device are supported by plural support legs(12) to adjust inclined angles for the horizon. Thereby, the shim control of a rotating shaft(O2) of a grindstone(3) is unnecessary though the rotating shaft(O2) of a lower grindstone shaft(5) is dispersed in a vertical status. The upper and the lower sections of a workpiece(W) are adjusted in parallel with grindstones(2,3) by adjusting the inclination of the bed. The grinding accuracy is improved by a simple adjustment and the consistency of a grinding thickness in the workpiece is maintained.

Description

Vertical type of double disc surface grinding machine}

The present invention is provided with a pair of whetstone facing each other up and down, the workpiece is fixed to the workpiece fixture jig installed on the rotary table, the workpiece is supplied to the grinding position between the grindstone, the workpiece rotates about the axis of rotation of the fixture It relates to a vertical double-head planar grinding machine configured to simultaneously grind the upper and lower sides of a workpiece in one state.

According to the size and type of the workpiece, a vertical double head type grinding machine is provided with a workpiece supply device suitable for the workpiece. For example, a workpiece support hole formed in a plate-shaped rotary carrier in a rigid workpiece that cannot be supported at the center such as a piston ring. The work piece feeder is supported such that the upper and lower end surfaces of the work piece protrude from each other, and are supplied to the grinding position between the grindstones while rotating the work piece by a ring gear mechanism or the like. In addition, even in a workpiece having a complicated shape whose distance is far from the rotating body even if it has a high rigidity such as a connecting rod, a workpiece supply device provided with a rotating carrier having the above-described workpiece supporting hole for supporting so as to rotate freely. Is used.

On the other hand, in a rotating body such as a braking disk for automobiles, in a workpiece having a wide grinding surface and a constant rigidity and not deformed even when supported at the center portion, the workpiece is fixed to the fixture and the workpiece is rotated together with the axis of rotation of the fixture. It is provided with a workpiece supply device for feeding to the grinding position between the grindstone.

Normally, the two grinding wheels of the vertical double head type grinding machine are configured to be movable in the vertical direction, and the upper grinding wheel is provided with an adjustment mechanism for adjusting the inclination angle of the rotating shaft so that it can be adjusted in parallel with the lower grinding wheel. However, the rotary shaft of the lower grindstone is fixed vertically at the time of shipment.

The vertical axis of the lower grinding wheel may be disturbed due to manufacturing error, conveyance, or impact during operation, and the horizontal level of the upper grinding surface of the lower grinding wheel may be disturbed.However, in the former workpiece supply device, the workpiece is supported by the workpiece support hole. As a result, the work can be inclined in correspondence with the grinding surface of the grindstone in the supporting hole, whereby the grinding thickness of the work can be kept constant.

However, in the latter workpiece supply device, since the workpiece is fixed to the rotary shaft of the fixture, the workpiece does not automatically be inclined to correspond to the grinding surface, and the grinding accuracy is not maintained while maintaining the consistency of the grinding thickness of the workpiece. In addition, if you want to correct this, the lower grinding wheel shaft must be disassembled to adjust the verticality by shim adjustment of the bearing.

Therefore, the present invention is to be able to easily adjust the horizontal of the workpiece to the inclination even if the horizontal degree of the lower grinding wheel, that is, the vertical degree of the lower grinding wheel is slightly distracted, so that grinding without grinding the grinding wheel shaft is laborious It is an object of the present invention to provide a vertical double head type grinder that can improve the accuracy.

1 is a side view of a vertical double-head flat grinding machine to which the present invention is applied,

2 is a front view of FIG. 1,

3 is a plan view of FIG.

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

5 is an enlarged cross-sectional view taken along the line VV of FIG. 3.

The present invention according to claim 1 includes a pair of grindstones fixed to a pair of vertical grindstone shafts and facing each other up and down, and a rotary table for supporting the workpiece and feeding the workpiece to the grinding position between the grindstones, In a vertical double head type grinding machine equipped with a work fixing jig having a rotating shaft for rotating a workpiece at a predetermined position on a rotating table, the table and the bed supporting the drive mechanism are supported horizontally by supporting a plurality of height-adjustable supporting legs. Characterized in that it is possible to adjust the inclination angle of the front and rear and left and right.

The present invention according to claim 2 is characterized in that, in the vertical double head type grinder according to claim 1, a support leg is provided on a sliding bed which is capable of sliding in the horizontal direction.

1 is a side view of a vertical double-head flat grinding machine to which the present invention is applied, in which a pair of grindstones 2 and 3 and a power transmission mechanism (not shown) are stored in the main body case 1 facing each other up and down, and a work piece The supply device 6 is provided adjacent to the main body case 1. Meanwhile, for convenience, it is assumed that the side in which the workpiece supply device 6 is installed is the front side, and the following content will be described.

The lower grinding wheel 3 is fixed to the upper end of the vertical lower grinding wheel 5, and the upper grinding wheel 2 is the upper grinding wheel 4 arranged on the rotating shaft O1 concentric with the rotating shaft O2 of the lower grinding wheel. It is fixed to the lower end of the), these grinding wheels (4, 5) are respectively configured to be movable in the vertical direction by the lifting mechanism and connected to the power transmission mechanism so as to rotate in opposite directions to each other.

The work supply device 6 includes a base 10 supported on a bottom surface and a front surface of a main body case 1, a sliding bed 11 supported on the base 10 so as to slide forward and backward, and a sliding bed Three support legs 12 adjustable in height (11), a bed 14 supported on the support leg 12, the rotary table 15 (index table) supported to be freely rotated on the bed (14) And a pair of workpiece fixing fixtures 17 provided on the rotary table 15, and a clamp device 20 for fixing the workpiece W mounted on the workpiece fixing fixtures 17 from above.

The clamp device 20 consists of a pair of cylinders 22 with a clamp rod 21 extendable downward, each cylinder 22 having a concentric axis of rotation O4 of the workpiece fixture 17, respectively. It is arrange | positioned on the rotating shaft and is fixed to the bracket 23 of the door shape fixed to the upper surface of the rotating table 15. As shown in FIG. As the clamp rod 21 is lowered, the workpiece W on the workpiece fixing fixture 17 is pressed down, and the clamp rod 21 is fixed together with the workpiece W while the workpiece W is pressed down. It is possible to rotate around the rotation axis O4.

A protective cover 25 is disposed around the rotary table 15, which is fixed to the front surface of the main body case 1.

FIG. 2 is a front view of FIG. 1, in which a pair of guide rails 26 each having a trapezoidal cross section is arranged on the base 10 on the left and right, and the guide rails 26 are provided on the inclined surfaces formed on both left and right ends of the sliding bed 11. The sliding bed 11 is supported so that the sliding bed 11 can freely swing only in the front-rear direction by contacting the inclined surface. Although not shown, the sliding bed 11 can be fixed to any front and rear position by the locking bolt mechanism.

3 is an enlarged plan view of FIG. 2, wherein the bed 14 is formed in a U shape when viewed from above, and the three support legs 12 are formed at the center of the left and right directions of the front end of the bed 14. It is arrange | positioned at the left and right both ends of a rear end part.

The pair of work fixtures 17 are arranged at a phase difference of 180 ° about the rotation axis O3 of the table, and as the rotary table 15 rotates halfway, the grinding position A1 on the grindstone side and the opposite side The position can be changed between the supply and takeout positions A2.

5 is an enlarged cross-sectional view taken along line V-V of FIG. 3, wherein the bed 14 portion corresponding to the support leg 12 is formed into a hollow portion having a U-shaped cross section, and the support leg 12 is a sliding bed ( 11) the base nut 30 mounted on the base nut, the main body bolt 33 screwed perpendicularly to the base nut 30, the adjusting nut 31 screwed to the main body bolt 33, and the adjusting nut 31 It is composed of a spherical joint portion 32, which is in contact with the upper side of the bed 14 to support the bottom wall portion of the bed 14 up and down, and a locking nut 35 screwed on the upper side of the spherical joint portion 32. That is, by loosening the lock nut 35 and adjusting the rotating mechanism 31 to adjust the support height of the bed 14 via the spherical joint 32, the support height of each support leg 12 is adjusted. By adjusting each of them, the inclination of the front and rear and the left and right with respect to the horizontal of the bed 14 can be adjusted. On the other hand, fitting holes 35a and 31a for inserting the rotary tool are formed in the lock nut 35 and the adjustment mechanism 31, respectively.

The L-shaped bracket 27 is fixed to the front end surface of the base 10, and the screw shaft 28 for moving the sliding bed 11 in the front-back direction is freely rotated in the bracket 27 in the axial direction. Is supported so as not to move, the screw shaft 28 is screwed into the screw hole formed in the front wall of the sliding bed 11, the operation handle 29 is fixed to the front end of the screw shaft 28. That is, as the screw shaft 28 is rotated by the operation handle 29, the sliding bed 11 can be moved in the front-rear direction by using a screw feed action.

A vertical boss portion 40 is integrally formed at the rear end of the bed 14 so that the shaft portion 42 of the rotary table 15 rotates freely via the bearing 41 to the boss portion 40. Supported. The conductive case 44 is fixed to the lower end of the boss portion 40, and the electric motor 45 is attached to the upper surface of the front portion of the conductive case 44. In the conduction case 44, timing gears 51 and 52 are fixed to the lower end of the motor shaft 50 of the electric motor 45 and the shaft portion 42 of the rotary table 15, respectively. 52, a timing belt 53 is wound.

4 is an enlarged cross-sectional view taken along the line IV-IV of FIG. 3, wherein the work fixture jig 17 includes a cylindrical jig main body 60 fixed perpendicularly to the upper wall of the rotary table 15, and the jig main body 60. It has a rotating shaft (63) freely rotated through the bearings (61, 62) but not supported in the axial direction. The upper surface of the rotating shaft (63) has concentricity with the rotating shaft (O4) of the fixture. At the same time, a positioning pin 65 protruding upward from the rotation axis is installed, and an annular workpiece mounting 64 is fixed, and the annular workpiece mounting 64 inserts the boss portion Wa of the workpiece W. The center hole 64a which can be provided is provided. The diameter of the positioning pin 65 is sized to which the workpiece boss portion Wa can be fitted.

An electric motor 70 for rotating the work is fixed on the rotary table 15 toward the center of the table in the work fixture jig 17, and the reduction gear 72 fixed to the motor shaft 71 of the electric motor 70 is fixed. And the gear 73 provided at the lower end of the rotary shaft 63 are engaged in the rotary table 15. That is, the rotation shaft 63 of the fixture jig 17 is rotated by the rotation of the electric motor 70, and thus the workpiece W fixed to the annular workpiece holder 64 by the clamp rod 21 is fixed. It rotates (rotates) around the rotation axis O4 of the jig.

Action

In Fig. 1, as described above, by rotating the rotation table 15, the workpiece fixture 17 is changed in position between the rear grinding position A1 and the front feeding and disassembling position A2. In the feeding and disassembly position A2, the workpiece W which has been ground and the ungrinded workpiece W are exchanged by raising the clamp rod 21, and the workpiece W which has not been ground by lowering the clamp rod 21. ) Is fixed to the work fixture jig (17). On the other hand, in the grinding position A1, the workpiece | work W is rotated about the rotating shaft O4 of the fixed jig | tool, and both upper and lower end surfaces are simultaneously ground-plane-grinded by the upper and lower rotary grindstones 2 and 3 at the same time.

When the replacement of the workpiece is completed at the feeding and disassembly position (A2) while the grinding of the workpiece is completed at the grinding position (A1), the upper and lower grindstones (2, 3) are moved to the upper and lower end faces of the workpiece (W) at the grinding position (A1). At the same time, the upper and lower sides are separated, and at the same time, the rotation of the fixing fixture 17 at the grinding position A1 is stopped and the rotary table 15 is rotated 180 degrees.

The ungrinded workpiece W moved from the feeding and disassembling position A2 to the grinding position A1 is rotated by the rotation of the rotary shaft 63 of the fixing jig 17 as shown in FIG. 4. And the clamp rod 21, rotated about the rotation axis O4 of the fixture, and the grinding wheels 2, 3 in the upper and lower sides approach the workpiece W in this rotational state, respectively, so that the outer circumferential portion of the workpiece W is closed. The upper and lower cross-sections of are ground a predetermined amount.

Tilt adjustment

In Figure 1, by adjusting the height of the three support legs 12 supporting the bed 14, respectively, the inclination of the front and rear and left and right with respect to the horizontal of the bed 14, thereby adjusting the rotary shaft of the lower grinding wheel (O2) And the parallelism between the rotary shaft O3 of the table and the rotary shaft O4 of the fixed jig, so that the upper and lower end faces of the workpiece W are set to be parallel to the upper grinding surface of the lower grindstone 3.

In this inclination adjustment, preferably the upper grinding surface of the lower grindstone 3 is in a horizontal state with the lower grindstone shaft 5 being vertical, whereby the bed 14 is rotated on the rotary shaft O3 of the table and Although the upper and lower sections of the workpiece are adjusted to be horizontal while the rotary shaft O4 of the fixture is vertical, in practice, the rotary shaft O2 of the lower grindstone is inclined to a tolerance range with respect to the vertical, and the vibration or work during It is often inclined beyond the tolerance due to the impact during the impact. In such a case, by adjusting the inclination angle of the bed 14 without modifying the vertical degree of the lower grindstone shaft 5, the rotary shaft O3 of the table and the rotary shaft O4 of the fixed jig are connected with the rotary shaft O2 of the lower grindstone. It adjusts so that it may become parallel, and it sets so that the upper and lower end surfaces of the workpiece | work W may become parallel with the upper grinding surface of the lower grindstone 3. In addition, the inclination angle of the upper grindstone shaft 4 is adjusted to the inclination angle of the lower grindstone shaft 5 so that the grinding surface of the upper grindstone 2 may become parallel with the upper grinding surface of the lower grindstone 3, too. Accordingly, even if the verticality of the rotary shaft O2 of the lower grindstone is disturbed, the grinding wheels 2 and 3 and the work W can be ground in parallel with each other, and thus the grinding thickness of the work W is reduced. It remains the same and can perform double-sided grinding with good precision.

Front and rear adjustment

When the type of the workpiece is changed and the grinding range is widened or narrowed, the sliding bed 14 of FIG. 1 is unlocked and the position of the sliding bed 11 is adjusted in the front and rear directions by the rotation operation of the operation handle 29. As a result, the work W in the grinding position A1 is set to be an optimal position with respect to the grindstones 2 and 3.

The grinding position between the grindstones (2,3) and the pair of grindstones (2,3), which are fixed to a pair of vertical grindstone shafts (4,5) respectively and face each other up and down, support the workpiece (W) ( A vertical double head type having a rotary table 15 for supplying a workpiece to A1) and provided with a workpiece fixing fixture 17 having a rotary shaft 63 for rotating the workpiece W while fixing the workpiece W to a predetermined position on the rotary table 15. In the planar grinding machine, since the table 15 and the bed 14 supporting the driving mechanism are supported by a plurality of height-adjustable support legs 12, the inclination angles of the front, rear, left and right with respect to the horizontal can be adjusted. Even if the rotary shaft O2 of the grindstone shaft 5 is distorted in a vertical state, it is not necessary to perform the laborious work of restraining the rotation shaft O2 of the grindstone 3, and the work supply device side bed 14 The upper and lower sections of the work piece W in parallel with the grindstones 2 and 3 The grinding accuracy can be improved by simple adjustment, and the consistency of workpiece grinding thickness can be maintained.

If the support legs 12 are installed on the sliding bed 11 which can be adjusted in the horizontal direction, even if the sliding bed 11 is adjusted only in the front-rear direction with respect to the workpiece W having various sizes or shapes, The corresponding grinding area can be easily secured.

Claims (2)

The grinding position between the grindstones (2,3) and the pair of grindstones (2,3), which are fixed to a pair of vertical grindstone shafts (4,5) respectively and face each other up and down, support the workpiece (W) ( A vertical double head type having a rotary table 15 for supplying a workpiece to A1) and provided with a workpiece fixing fixture 17 having a rotary shaft 63 for rotating the workpiece W while fixing the workpiece W to a predetermined position on the rotary table 15. In the face grinding machine, Vertical double head type characterized in that the angle of inclination of the front, rear, left and right with respect to the horizontal can be adjusted by supporting the table 15 and the bed 14 supporting the driving mechanism with a plurality of height adjustable legs. Face grinding machine. The vertical double head type flat grinding machine according to claim 1, wherein a support leg (12) is provided on a sliding bed (11) capable of sliding in a horizontal direction.