JPS6312740B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a workpiece transfer device for a polishing machine that simultaneously polishes both end faces of a workpiece by being transferred between rotating grindstones.

As shown in FIGS. 1 and 2, this type of polishing machine has rotating shafts 3 and 4 of opposing upper and lower grinding wheels 1 and 2.
are supported by a device main body (not shown) and rotated by motors 5 and 6, respectively, and one of the grindstones is movable up and down along with its rotating shaft. The held workpiece w is moved between the grinding wheels 1 and 2 in an up-and-down position, and the carrier plate 7
In the process of being held between the two grinding wheels 1 and 2 and moving between them, both end surfaces of the workpiece w are polished simultaneously.

This invention is a workpiece transfer device for transferring a workpiece in a sandwiched position between upper and lower opposing grinding wheels in the above-mentioned polishing machine.The details of this invention will be described below with reference to an embodiment shown in FIGS. 3 to 5. The explanation is as follows.

In Figs. 3 to 5, 7 is a carrier plate that holds the workpiece w. This carrier plate 7 is shaped like a disc, and the workpiece w is inserted and held at positions equally spaced around its circumference. An appropriate number of workpiece holders (not shown) are arranged. 8 is a hollow shaft,
This hollow shaft 8 has cylindrical guide holders 9, 9 integrally formed on both left and right sides, and these guide holders 9, 9
Fix both ends on the board 10 with brackets 11,1
The guide bars 12, 12 are fixedly supported by the guide bars 12, 12, and are disposed in parallel, through bushes 13, 13, and are slidably and loosely fitted therein. 14 is a plate shaft, and this plate shaft 14 has roller bearings 15, 1 in the hollow shaft 8.
A holding member 17 and a tightening bolt 18 concentrically hold the carrier plate 7 on a plate receiving portion 16 integrally formed at the upper end thereof.
Attach and fix the worm wheel 1 at the bottom end.
9 is installed and fixed. 20 is a drive shaft, and this drive shaft 20 is rotatably supported in a casing 21 fixedly attached to the lower end of the hollow shaft 8 via ball bearings 22, 22 and roller bearings 23, 23, and the worm wheel is located at an intermediate position. A worm gear 24 that is always in mesh with the worm gear 19 is integrally formed, and a drive pulley 25 is attached and fixed to one end. Although not shown, the drive pulley 25 is connected to a drive motor via a belt, pulley, etc., and the drive motor rotates the drive shaft 20 via the drive pulley 25, and further rotates the worm gear 24 and the worm wheel 19. The plate shaft 14 is rotated through the carrier plate 7 to rotate the carrier plate 7. 26 is an eccentric cam ring, and this eccentric cam ring 26 is attached to the drive shaft 2.
The inner ring 26a is eccentrically attached and fixed to a part of the inner ring 26a.
and an outer ring 26b spline-fitted onto the inner ring 26a, and the reciprocating width of the drive shaft 24 is adjusted by appropriately changing the fitting position of the inner ring 26a and the outer ring 26b. . Note that in the state shown in FIGS. 3 to 5, the inner ring 2 of the eccentric cam ring 26 is
6a and outer ring 26b are fitted. Reference numeral 27 denotes a locking arm, the upper part of which is attached and fixed to the lower surface of the fixed base plate 10 by a tightening bolt 28, and its two crotches 27a engage the eccentric cam ring 26 through shoes 29, 29. ing.

Next, the operation of the workpiece transfer device of the polishing machine having the above configuration will be described in detail.

First, the reciprocating width of the drive shaft 20 is determined by appropriately changing the spline fitting positions of the inner ring 26a and outer ring 26b of the eccentric cam ring 26. After determining the reciprocating width of the drive shaft 20 as described above, when the drive motor is driven and rotated, the drive shaft 20 is rotated via the drive pulley 25, and the plate shaft 14 is further rotated via the worm gear 24 and the worm wheel 19. is rotated to rotate the carrier plate 7. Furthermore, at this time, the eccentric cam ring 26 mounted on the drive shaft 20 is also rotated synchronously. Then, the eccentric cam ring 26 is engaged with the bifurcated portion 27a of the locking arm 27 and rotates in a fixed position, so that the drive shaft 2 which is eccentric with respect to the eccentric cam ring 26
0 is made to reciprocate while rotating. As a result, the casing 21 that supports the drive shaft 20 reciprocates, the hollow shaft 8 also reciprocates, the plate shaft 14 supported within the hollow shaft 8 reciprocates, and the carrier plate 7 reciprocates. It moves me.
Therefore, since the carrier plate 7 performs rotational motion and reciprocating motion, the workpiece w held by the carrier plate 7 traces a trajectory as shown in the dashed line in FIG. Then both end faces are polished. That is, since both end faces of the workpiece w are polished while following the movement locus shown in the dashed line in FIG. 6, the amount of polishing increases, and the workpiece w can be polished with high efficiency and high quality. Can be done.

As explained above, the present invention provides a polishing system in which a drive motor rotates a drive shaft via a drive pulley, and further rotates a plate shaft via a worm gear and a worm wheel to drive and rotate a carrier plate. In a workpiece transfer device of a machine, a guide holder having the plate shaft integrally formed on both left and right sides is loosely fitted into a guide bar arranged parallel to a fixed base plate, and is slidably supported on the fixed base plate. , the drive shaft is rotatably supported in a casing that is integrally attached and fixed to the lower end of the hollow shaft;
The eccentric cam ring attached and fixed to a part of the drive shaft is engaged with the locking arm attached and fixed to the fixed base plate, and the rotation of the eccentric cam ring causes the drive shaft, casing, hollow shaft, and plate shaft to reciprocate, thereby reciprocating the carrier. Since the plate is rotated and reciprocated, the amount of polishing increases and the workpiece can be polished with high efficiency and quality.Moreover, the carrier plate has a simple structure and rotates. Since reciprocating motion can be induced, the device can be provided at an extremely low cost.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of a polishing machine according to the present invention;
Fig. 2 is a plan view of the same with the upper grindstone removed, Fig. 3 is a longitudinal sectional front view of the main part of the workpiece transfer device of the present invention, and Fig. 4 is a longitudinal sectional view taken along the line - in Fig. 3. 5 is a vertical sectional view of a main part taken along the line --- in FIG. 3, and FIG. 6 is an explanatory diagram showing a workpiece transfer trajectory by the workpiece transfer apparatus of the present invention. 7...Carrier plate, 8...Cavity part, 9,
9... Guide holder, 10... Fixed board, 12,
12...Guide bar, 14...Plate shaft, 19...
... Worm wheel, 20 ... Drive shaft, 21 ...
Casing, 24... Worm gear, 25... Drive pulley, 26... Eccentric cam ring, 26a...
Inner ring, 26b... Outer ring, 27... Locking arm, 2
7a...Two crotches.

Claims (1)

[Claims] 1. A workpiece transfer device for a polishing machine in which a drive shaft is rotated by a drive motor via a drive pulley, and a plate shaft is further rotated via a worm gear and a worm wheel to rotate a carrier plate. , a guide holder with the plate shaft integrally formed on both left and right sides is loosely fitted into a guide bar arranged parallel to a fixed substrate, and rotatably supported in a hollow shaft provided so as to be slidable with respect to the fixed substrate. At the same time, the drive shaft is rotatably supported in a casing that is integrally attached and fixed to the lower end of the hollow shaft, and a locking arm that is attached and fixed to a fixed base plate is engaged with an eccentric cam ring that is attached and fixed to a part of the drive shaft. Workpiece transfer of a polishing machine, characterized in that the drive shaft, casing, hollow shaft and plate shaft are reciprocated by the rotation of an eccentric cam ring, and the carrier plate is rotated and reciprocated. Device.