JPH0525810Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) The invention includes a guide table having a planar upper end guide surface on the workpiece entrance and exit sides of a pair of upper and lower grinding wheels that rotate around a vertical axis. The present invention relates to a workpiece carrier device for a vertical surface grinding machine, in which an endless carrier plate having a plurality of workpiece holding holes is repeatedly rotated so as to move along the upper surface of a guide surface and pass between grinding wheels.

(Prior Art and its Problems) As the endless carrier plate of this type of work carrier device, a rotary carrier disk or a wrap-around carrier belt is generally used.

In conventional workpiece carrier devices equipped with the carrier plate described above, the following problems occur when transporting particularly light and thin workpieces, such as hollow piston rings with a thickness of about 0.5 to 1.5 mm. Sometimes it happens.

(1) In order to cope with thin workpieces, a carrier plate that is even thinner than the workpiece is used, so that the carrier plate 10 is likely to become distorted as shown in FIG. 11 during use. In particular, since the distance between the grinding wheels is set narrowly, when the carrier plate 10 comes into contact with the grinding stones, the carrier plate 10 is further distorted by the frictional heat. If the carrier plate 10 is distorted in this way, the workpiece W may be
got into the underside of the carrier plate 10,
If it becomes clogged at the entrance of the upper entrance guide 18, or if it enters between the grinding wheels, it will cause defective products.

(2) During use, as shown in Fig. 12, the edge P of the workpiece holding hole 12 becomes rounded; The workpiece W may come off and become unable to be fed between the grindstones.

(3) Also, as shown in Fig. 13, the workpiece W floats high due to the grinding fluid L flowing out from the grinding wheel to the guide surface 8, which causes the upper guide 1 on the inlet side to
It may collide with the entrance part of 8.

(Purpose of the invention) The object of the invention is to provide a workpiece carrier device that can always reliably hold a workpiece while smoothly feeding the workpiece between grinding wheels.

(Means for achieving the purpose) A guide stand having a planar upper end guide surface is arranged on the workpiece inlet side and outlet side of a pair of upper and lower grindstones rotating around a vertical axis, and a plurality of guide stands having a planar upper end guide surface are arranged. In a workpiece carrier device for a vertical surface grinding machine, a thin endless carrier plate having a workpiece holding hole moves along the upper surface of a guide surface and repeatedly rotates to pass between grinding wheels. A large number of open small-diameter suction holes are formed, and the suction holes are connected to a suction device to attract the carrier plate moving on the guide surface and the thin workpiece held thereto downward.

(Function) On the guide surface, the carrier plate and the workpiece are attracted downward by the suction action of the suction hole, so that the workpiece will not sneak under the carrier or come off from the workpiece holding hole. Workpieces can always be smoothly fed between the grinding wheels in a normal posture.

(Example) Figure 2 shows a carrier disk 1 as an endless carrier plate.
This is an example in which the present invention is applied to a surface grinding machine equipped with a flat surface grinder. In FIG. 10 is disposed on the guide surface 8 and is fixed to a vertical rotary drive shaft 11 so as to rotate on the guide surface 8 in the direction of arrow F (workpiece conveyance direction). The carrier disk 10 is disposed so as to pass between the pair of upper and lower grindstones 1 and 2, and is provided with a plurality of work holding holes 12 at intervals in the circumferential direction. Guide surface 8
The part where the grindstones 1 and 2 are placed is cut out in an arc shape.

An upper entrance guide 18 is arranged on the entrance side of the grindstones 1 and 2 (opposite to the direction of arrow F), and an upper exit guide 19 is arranged on the exit side of the grindstones 1 and 2. A loading device 14 is disposed at a position spaced apart in the opposite direction, and a work discharge hole 15 is formed in a portion of the guide surface 8 spaced apart from the exit-side upper guide 19 in the direction of arrow F.

In FIG. 1 showing an enlarged sectional view taken along line II in FIG. 2, the upper and lower grinding wheels 1 and 2 face each other in the vertical direction across the workpiece grinding width, and are fixed to vertical rotating shafts 3 and 4, respectively. Same direction (or opposite direction)
Rotate to . The upper guides 18 and 19 each face the guide surface 8 at a fixed interval, are supported from above by a cushion spring 22, and are movable upward against the elastic force of the spring 20. be.

A large number of thin workpieces (for example, piston rings with a thickness of 0.5 to 1.5 mm) W are housed in the loading device 14, and are supplied to the workpiece holding hole 12 in order from the lowest workpiece W.

A large number of suction holes 23, which are the essential part of the present invention, are formed in the guide stand 7 so as to open upward from the guide surface 8. The suction hole 23 has an inner diameter of 1 mm, for example.
They are small diameter holes of about 4 mm, and are arranged at appropriate intervals from each other. The suction hole 23 is connected to the grindstones 1 and 2.
are formed at the inlet side portion and the outlet side portion respectively, and the inlet side portion is distributed from the portion close to the grinding wheels 1 and 2 to the portion corresponding to the loading device 14, and the outlet side portion is distributed from the portion close to the grinding wheels 1 and 2 to the portion corresponding to the loading device 14. 2 to the exit side upper guide 19
It is distributed up to the part corresponding to the tip in the direction of arrow F.

The suction holes 23 are combined into a suction passage 24 and connected to a suction device 25. The suction device 25 is connected to a gas-liquid separation device 27. Gas-liquid separation device 27
The grinding fluid discharge passage 28 leads to, for example, the tank 26, and the air discharge passage 29 is open to the outside.

A grinding fluid supply passage 16 is formed in the upper rotating shaft 3, and an outlet of the grinding fluid supply passage 16 opens between the two grindstones 1 and 2.

Next, the operation will be explained. The rotary grindstones 1 and 2 rotate, for example, in the direction R in FIG. 2, and the carrier disc 10 rotates in the direction indicated by the arrow F. The carrier disk 10 is attracted to the lower guide surface 8 by the suction action of the suction holes 23 on the inlet and outlet sides, and therefore always maintains a flat plate shape, without coming into contact with the grinding wheels 1 and 2. , 2 smoothly.

As described above, the thin workpieces W in the loading device 14 are sequentially supplied to the holding holes 12 of the rotating carrier disk 10, and are transferred on the guide surface 8 in the direction of the arrow F. During this transfer, the workpiece W is also attracted to the lower guide surface 8 together with the carrier disk 10 by the suction action of the suction hole 23, as shown in FIG. The entrance side guide 18 in FIG.
part, and then between the grindstones 1 and 2, where both the top and bottom surfaces are ground. Furthermore, since the grinding liquid on the guide surface 8 is also sucked together with air from the suction hole 23, there is no fear that the workpiece W will be lifted up by the grinding liquid.

The ground workpiece W passes through the exit side guide 19, but at this time, the workpiece W also passes through the carrier disk 1.
0 and is attracted to the lower guide surface 8 by the suction action of the suction hole 23, so the workpiece W is attached to the holding hole 1.
Reliably held within 2. Then, it is discharged from the discharge hole 15.

The sucked air and grinding fluid are transferred to the gas-liquid separator 2.
7, the grinding fluid is discharged into a tank 26, and the air is discharged to the outside.

(Another embodiment) (1) Figures 4 to 9 show another embodiment,
The direction of rotation F of the carrier disk 10 is opposite to that in FIG.

In FIG. 4, a work discharge section 53 is formed by separating the portion of the guide table 7 on the side opposite to the grinding wheels 1 and 2.
A discharge chute 35 is arranged.

The suction holes 23 are arranged in two rows at intervals in the circumferential direction at the outer and inner radial ends of the guide stand 7, and the suction holes 23 on the inlet side
3 is the loading device 1 from the vicinity of the grinding wheels 1 and 2.
The suction hole 23 on the exit side is arranged within an angular range of, for example, about 40° to 50° from the vicinity of the grindstones 1 and 2. Further, suction holes 23 arranged in a circular manner to match the shape of the workpiece (piston ring) are also formed in the interior of the loading device 14.

The suction holes 23 facing each other on the outer side and the inner side
The radial passages 38 communicate with each other via radial passages 38, and each radial passage 38 communicates with the suction passage 24 via a main passage 37 or directly with the suction passage 24. The suction hole 23 in the loading device 14 is independently connected to the suction passage 2.
It is connected to 4.

Two carrier disk height adjustment bolts 45 are screwed into each of the guide stand 7 portions on the entrance side and the exit side near the grindstones 1 and 2. Above bolt 45
As shown in FIG. 7, is screwed into the guide stand 7 from below and protrudes slightly from the guide surface 8. That is, the carrier disk 10 is placed on the guide surface 8.
By slightly lifting the carrier disc 10 from the stuck state and feeding it between the grinding wheels 1 and 2, the carrier disc 10 is prevented from rubbing against the lower grinding stone 2.

5 and 6 show cross-sectional views of the passages 38 and 37, respectively, and 42 is a plug.

As shown in FIG. 8, the suction hole 23 in the loading device 14 portion is formed in a replaceable disk-shaped block 40, and the block 40 has a bolt 50 mounted on a block mounting seat 47 of the guide stand 7.
Fixed by A suction chamber 52 is formed below the mounting seat 47.
communicates with the suction passage 24.

That is, as shown in FIG. 9, several types of blocks 40 having suction hole arrangements suitable for the shapes of various workpieces are prepared and can be replaced for each type of workpiece. 48 is an air vent hole, and 49 is a bolt insertion hole.

According to the device shown in FIG. 4, loading device 1
The workpiece is reliably sucked downward in the four sections, and the workpiece is smoothly fed into the carrier disk 10. Particularly when piston rings are supplied as workpieces, it is possible to prevent the cut portions of the piston rings from getting caught together.

Also, in FIG. 4, the loading device 14
The workpiece that comes out from the entrance side immediately enters the lower side of the entrance side guide 18.

(2) FIG. 10 shows an example in which a carrier belt 10' is provided as an endless carrier plate. The carrier belt 10' connects the front driving wheel 30 and the rear driven wheel 31.
It has a plurality of workpiece holding holes 12 at intervals in the moving direction F, and moves on the guide surface 8 on the entrance side, between the two grinding wheels 1 and 2, and on the guide surface 8 on the exit side, Guide surface 8 on the entrance side again
It is starting to return to . Other structures are first
It is almost the same as the figure, and the same parts are given the same numbers.

(Effect of the invention) As explained above, the present invention provides a guide stand 8 having a planar upper end guide surface 8 on the workpiece inlet side and outlet side of the pair of upper and lower grinding wheels 1 and 2 rotating around a vertical axis. A thin endless carrier plate 10 having a plurality of work holding holes 12 penetrating vertically.
However, in a workpiece carrier device for a vertical surface grinding machine that moves along the upper surface of the guide surface 8 and repeatedly rotates to pass between the grinding wheels, a large number of small diameter suction holes 23 that open upward in the guide surface 8 are provided. (1) During driving, the carrier plate 10 moving on the guide surface 8 and the thin workpiece W held thereon are attracted downward by The carrier plate 10 can always be kept in a flat state, and the workpiece W being transferred can be reliably held in the workpiece holding hole 12, so that the workpiece W can hide under the carrier plate 10 during transfer. There is no need to worry about it falling off or coming off upwards.

Therefore, for example, as in the conventional case, the guide 1 on the entrance side
If the workpiece or carrier plate 10 collides with 8 and the carrier plate 10 stops or the workpiece W
There is no possibility that the grinding wheel will be supplied between the grinding wheels 1 and 2 while being hidden under the carrier plate 10, thereby producing defective products.

This effect is particularly noticeable in a grinding machine equipped with a thin carrier plate for grinding a thin workpiece W.

(2) Furthermore, since the grinding liquid on the guide surface 8 can be sucked together with the air from the suction hole 23, the workpiece W being transferred will not float up high due to the grinding liquid. That is, it is possible to reliably prevent the workpiece W from coming off the holding hole 12 due to the grinding fluid.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional partial view of a surface grinder to which the present invention is applied (cross-sectional view taken along line I-I in Figure 2).
3 is an enlarged view of the portion shown in FIG. 1, FIG. 4 is a plan view of a guide stand of another embodiment,
Figures 5, 6, 7, and 8 are enlarged cross-sectional views of the block V-V, -, -, - of Figure 4, respectively, Figure 9 is a view of the block in Figure 8 in the direction of arrows, and Figure 1
Figure 0 is a schematic longitudinal cross-sectional view of yet another embodiment, No. 11.
12 and 13 are respectively partially enlarged vertical cross-sectional views of conventional examples. 1, 2... Grindstone, 3, 4... Rotating shaft, 7... Guide stand, 8... Guide surface, 10... Carrier disk (an example of carrier plate), 10'... Carrier belt (different type of carrier plate) example), 12...work holding hole,
18, 19... Upper guide, 23... Suction hole, 2
5...Suction device.

Claims (1)

[Claims for Utility Model Registration] 1. A guide stand having a planar upper end guide surface is arranged on the work entry and exit sides of a pair of upper and lower grindstones that rotate around a vertical axis, and a plurality of In a workpiece carrier device for a vertical surface grinding machine, a thin endless carrier plate having a workpiece holding hole moves along the upper surface of a guide surface and repeatedly rotates to pass between grinding wheels. A large number of small-diameter suction holes are formed, and the suction holes are connected to a suction device so that the carrier plate moving on the guide surface and the thin workpiece held therein are attracted downward. Work carrier device for vertical surface grinding machine. 2. A workpiece carrier device for a vertical surface grinding machine according to claim 1, wherein an upper guide is arranged opposite to the guide surface at a distance from above.