JP3488608B2 - Work carrier device for vertical surface grinder - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pair of upper and lower grindstones rotating around a vertical axis on the work inlet side and the work outlet side.
A guide stand having a flat upper end guide surface is arranged, and an endless carrier plate having a plurality of work holding holes moves along the upper surface of the guide surface and passes between the grindstones. -Regarding the carrier device.

[0002]

2. Description of the Related Art Generally, a rotary carrier disc or a wrapping type carrier belt is used as an endless carrier plate of a work carrier device of this type, and it is provided in a work holding hole formed in the carrier plate. Both ends of the work are surface-ground while the work is held and passed between the grindstones that are vertically opposed to each other.

[0003]

In the conventional work carrier device, the work is light and thin, for example, 0.5 m thick.
The following problems may occur when a hollow piston ring of about m to 1.5 mm is transferred.

(1) Since a carrier plate which is thinner than the work is used in correspondence with the thin work, the corrugated phenomenon occurs in the carrier disk 10 as shown in FIG. When the carrier disk 10 is wavy in this manner, the work W sunk into the lower side of the carrier disk 10 during the work transfer, and the work W is clogged at the entrance portion of the entrance-side upper guide 18, or is left between the grindstones. It will be ground and cause defective products.

(2) An edge (roundness) occurs at the edge P of the work holding hole 12 as shown in FIG. 8 during use.
As a result, the work W may be disengaged upward from the holding hole 12 in the direction opposite to the transport direction F, and the work W may not be fed between the grindstones.

(3) Further, as shown in FIG. 9, the work W floats high due to the grinding liquid L flowing out from the grindstone portion to the guide surface 8 and thereby collides with the inlet portion of the inlet side upper guide 18. I have something to do.

In order to solve such a problem, the applicant of the present application has proposed a work carrier device in which a small-diameter suction hole is formed in the lower guide surface on the inlet side and the outlet side to draw the carrier plate downward. Developing (actual fair 5-2581
No. 0).

However, even if only the inlet side and the outlet side of the grinding wheel are sucked, the above problem has not been sufficiently solved because the suction action does not work in the region between the grinding wheels.

[0009]

An object of the present invention is to prevent the above-mentioned grinding failure more reliably by making it possible to suck the carrier plate even in a portion sandwiched between rotating grindstones. There is.

[0010]

In order to achieve the above object, the invention according to claim 1 of the present application is such that a pair of upper and lower grinding wheels rotating about a vertical axis are flat on the work inlet side and the work outlet side. A work table of a vertical surface grinder in which a guide table having a top end guide surface is arranged and an endless carrier plate having a plurality of work holding holes moves along the upper surface of the guide surface and passes between grindstones. In the carrier carrier device, a large number of small-diameter suction holes that open upward are formed on both the inlet-side and outlet-side guide surfaces, and a large number of small-diameter suction holes that also open upward are provided in the grinding wheel, and each suction hole is It is characterized in that it is connected to a suction device so that the carrier disk on the guide surface and on the grinding wheel is pulled downward.

According to a second aspect of the present invention, in the work carrier device of the vertical surface grinding machine according to the first aspect, a porous plate having a large number of suction holes is fixed to a central concave portion of the grinding wheel to form a grinding wheel. The feature is that a suction hole is provided.

According to a third aspect of the present invention, in the work carrier device of the vertical surface grinding machine according to the first aspect, the suction hole of the grinding wheel is formed on the annular grinding surface around the central recess of the grinding wheel. It is characterized by that.

According to a fourth aspect of the present invention, in the work carrier device for the vertical surface grinding machine according to the first, second or third aspect, the suction holes provided in the grinding wheel are located outside the region through which the carrier plate passes. The suction hole is covered with an air seal plate.

[0014]

FIG. 2 shows a work carrier device of a surface grinder to which the inventions of claims 1, 2 and 4 are applied, in which a carrier disk 10 is provided on a guide base 7 as an endless carrier plate. Is. The guide base 7 has a substantially circular horizontal upper guide surface 8, and a thin horizontal carrier disk 10 is arranged on the guide surface 8 and fixed to a vertical rotary drive shaft 11. The guide surface 8 is adapted to rotate in the arrow F direction (work transfer direction). The carrier disk 10 is arranged so as to pass between a pair of upper and lower grinding wheels 1 and 2 (however, the upper grinding wheel 1 is not shown), and in particular, the outer peripheral end of the carrier disk 10 has a grinding wheel axis center. The radius is set so as to pass through, and a plurality of work holding holes 12 are formed in the carrier disk 10 at intervals in the circumferential direction. A portion of the guide surface 8 where the grinding wheels 1 and 2 are arranged is cut out in an arc shape.

An inlet side upper guide 18 is arranged on the inlet side of the grinding wheels 1 and 2, an outlet side upper guide 19 is arranged on the outlet side, and the inlet side upper guide 18 is arranged in the direction opposite to the arrow F direction. Loading device 1 at spaced positions
4 is provided, and a work discharge hole 15 is formed in a portion of the guide surface 8 spaced from the outlet side upper guide 19 in the arrow F direction.

On the inlet side and the outlet side of the grinding wheel of the guide surface 8,
A large number of small-diameter suction holes 23 opening upward are formed, and a circular perforated plate 25 having a large number of small-diameter suction holes 24 opening upward is fixed to the center of rotation of the lower grinding wheel 2. The suction holes 23 and 24 are distributed at equal intervals, and the small-diameter suction holes 23 on the inlet side are loaded in the loading device 14.
As a result, the outlet side suction hole 23 reaches before the discharge hole 15.

In FIG. 1, which is an enlarged sectional view taken along the line I--I of FIG. 2, the upper and lower grinding wheels 1 and 2 are thick-walled grinding wheel base plates 26 and 27 made of metal, respectively, and the grinding surface side of each base plate 26 and 27. It is composed of diamond abrasive grain layers (CBN) 28 and 29 provided in the above, and is fixed to upper and lower vertical rotating shafts 3 and 4, respectively, and rotates in the same direction (or opposite direction). Both abrasive grain layers 28 and 29 are opposed to each other with a work grinding width in the vertical direction. As shown clearly in FIG. 3, a concave portion 31 having an inner peripheral female thread portion is formed in the central portion of the lower whetstone base plate 27,
The circular perforated plate 25 is screwed into the recess 31. Regarding the screwing height of the circular perforated plate 25, the upper end surface is substantially the lower base plate 2
The height is the same as the upper end surface of 7.

In FIG. 1, the guide surface 8 and the perforated plate 25 are shown.
The suction holes 23, 24 are small diameter holes having an inner diameter of about 1 mm to 14 mm, for example, and are arranged at appropriate intervals. The suction holes 23 of the guide surface 8 are gathered in a suction passage 32 and connected to a suction device 35.
Is connected to the suction device 35 through the air suction passage 36 in the recess 31 and in the shaft core portion. The suction device 35 is connected to the gas-liquid separation device 37, the grinding liquid discharge passage 38 of the gas-liquid separation device 37 reaches the tank 39, and the air discharge passage 40 is open to the outside.

The upper guide 18 (19) faces the guide surface 8 at a constant distance, and a cushion spring 22 is interposed above the upper guide 18 (19) to resist the elastic force of the cushion spring 22 and move upward. It is possible to move.

A large number of thin works W (for example, a piston ring of 0.5 mm to 1.5 mm) W are housed in the loading device 14, and the work holding holes W are arranged in order from the bottom end work W. 12 are supplied.

An area of the upper surface of the lower grinding wheel 2 other than the passage area of the carrier disk 10 is covered with an air seal plate 41. The air seal plate 41 is arranged between the upper and lower grinding wheels 1 and 2, and has a flange portion 41a protruding outward from the outer peripheral end of the grinding wheel 2, and the flange portion 41a is provided with a support frame 42 and a grinding machine. It is fixed to the frame 43.

A grinding liquid supply passage 16 is formed in the upper rotary shaft 3, and an outlet of the grinding liquid supply passage 16 is provided between the grinding wheels 1 and 2 via a central recess 45 of the upper grinding wheel 1. It is open.

The operation will be described. The grinding wheels 1 and 2 rotate, for example, in the R direction of FIG. 2, the carrier disk 10 rotates in the direction of the arrow F, and the holding hole 12 of the rotating carrier disk 10 is rotated.
Then, the thin work W in the loading device 14 is sequentially supplied, and is transported on the guide surface 8 in the arrow F direction.

During transfer of the work, the carrier disk 10
Also, the work W is attracted downward by the suction action of the suction holes 23, 24 at three locations, the inlet side, the outlet side, and the center of the grinding wheel. As a result, the carrier disk 10 is kept flat without waviness, and the work W is securely held in the holding hole 12 so as to come off from the holding hole 12 or dive under the carrier disk 10. Smoothly without any
Both upper and lower surfaces are ground between the grinding wheels 1 and 2. In particular, even a work such as a hollow piston ring that is difficult to transfer can be ground while being surely held in the work holding hole. Further, since the grinding liquid on the guide surface 8 is sucked together with the air from the suction hole 23 of the guide surface 8, there is no fear that the work W is lifted by the grinding liquid.

The work W after grinding is automatically dropped and discharged from the discharge hole 15. The sucked air and the grinding fluid are separated by the gas-liquid separator 37, the grinding fluid is discharged to the tank 39, and the air is discharged to the outside.

[0026]

[Other Embodiments] (1) FIGS. 4 to 6 are examples in which the invention according to claim 3 is applied, and as shown in FIG. 6, an annular grind around the central recess 31 of the lower grinding wheel 2 is shown. Grain layer 29 and base plate 2
The suction holes 24 are formed in the inside 7 and communicated with the suction passage 36 in the shaft core portion. As shown in FIG. 5, the radius of the carrier disc 10 is such that the central recess 31 is not included as a carrier disc passage region, and the radius can be made smaller than that of the carrier disc shown in FIG.

Other than that, the structure is the same as that of FIGS. 1 to 3, and the same parts are designated by the same reference numerals.

According to this structure, it is possible to uniformly suck the entire area of the carrier disk passage area between the upper and lower grinding wheels 1 and 2.

(2) The present invention can also be applied to a surface grinder equipped with a carrier belt that linearly passes between both grinding wheels as an endless carrier plate.

[0030]

As described above, according to the present invention, (1) the guide surface 8 on the inlet side of the grinding wheels 1 and 2, the guide surface 8 on the outlet side, and the lower grinding wheel 2 are turned upward. Since the suction holes 23 and 24 that open are formed so that the carrier disk 10 and the work W are attracted downward at the above-mentioned three locations, the corrugation phenomenon of the carrier disk 10 is eliminated, and the carrier disk 10 is always flat. In addition to being able to keep the work, the work W being transferred can be surely held in the work holding hole 12, and the work W may dive under the carrier disk 10 during the transfer. There is no need to worry about it coming off. In particular, the effect is extremely remarkable in a grinder equipped with a thin carrier plate for grinding the thin work W.

(2) Since the grinding fluid can be sucked together with the air from the suction holes 23 and 24, the work W during the transfer is prevented from rising to a high level by the grinding fluid. That is, it is possible to reliably prevent the work W from coming off the holding hole 12 by the grinding liquid.

(3) When the porous plate 25 having the suction hole 24 is fixed to the central recess 31 of the lower grinding wheel 2 as described in claim 2, it is necessary to process the grinding surface itself. And easy to manufacture.

(4) In the structure in which the suction holes 24 are formed in the grinding surface of the lower grinding wheel 2 as in the third aspect of the invention, a wide suction area can be secured, and the carrier disk 10 is flat. Excellent in keeping function.

(5) When the air seal plate 41 is arranged in the grinding surface of the lower grinding wheel 2 and outside the carrier disc passage area, the suction holes 23, 24 are formed. The suction effect increases.

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional view (cross-sectional view taken along the line I-I in FIG. 2) of a surface grinder to which the inventions according to claims 1, 2, and 4 of the present application are applied.

FIG. 2 is an overall view taken in the direction of arrow II, showing the upper grinding wheel of FIG.

FIG. 3 is an enlarged view of a portion III in FIG.

FIG. 4 is a vertical sectional partial view (IV-IV sectional view of FIG. 5) of a surface grinder to which the invention according to claim 3 of the present application is applied.

5 is an overall view as seen from the direction of the arrow V, excluding the upper grinding wheel of FIG.

6 is an enlarged view of a VI portion of FIG.

FIG. 7 is an enlarged partial view of a vertical section of a conventional example.

FIG. 8 is an enlarged partial view of a vertical section of a conventional example.

FIG. 9 is an enlarged partial view of a vertical section of a conventional example.

[Explanation of symbols]

1, 2 grinding wheel 3,4 rotation axis 7 guide stand 8 guide surface 10 Carrier disc (an example of carrier plate) 12 work holding holes 18, 19 Upper guide 23, 24 suction holes 25 circular perforated plate 31 recess 41 Air seal plate

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B24B 7/17 B24B 37/04 B24B 41/06

Claims (4)

(57) [Claims] 1. A pair of upper and lower grinding wheels that rotate around a vertical axis are provided with guide stands having flat upper end guide surfaces on the work inlet side and the work outlet side, respectively, and a plurality of work holding holes are provided. In a work carrier device of a vertical surface grinder in which an endless carrier plate having a groove moves along an upper surface of a guide surface and passes between grindstones, both guide surfaces on an inlet side and an outlet side are opened upward. In addition to forming a large number of small-diameter suction holes, the grinding wheel is also provided with a large number of small-diameter suction holes that open upward, each suction hole is connected to a suction device, and the carrier disk on the guide surface and on the grinding wheel is moved downward. A work carrier device for a vertical surface grinder characterized by being attracted. 2. The vertical surface grinding machine according to claim 1, wherein the grinding wheel is provided with suction holes by fixing a perforated plate having a large number of suction holes in a central recess of the grinding wheel. Work carrier device. 3. The work carrier device for a vertical surface grinding machine according to claim 1, wherein the suction hole of the grinding wheel is formed on an annular grinding surface around a central recess of the grinding wheel. 4. The vertical mold according to claim 1, wherein the suction hole provided in the grinding wheel outside the region through which the carrier plate passes is covered with an air seal plate. Work carrier device for surface grinder.