JP2000318814A - Spherical body supply chute device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformize a flow of spherical bodies in a groove when the spherical bodies are supplied to a lapping machine, to reduce a variation in the number of times which each spherical bodies passes between the lapping machines, and to shorten a machining time by increasing the number of times which they passes through the lapping machines and to improve machining precision. SOLUTION: Concentric running grooves are formed in the opposite surfaces of two lapping machines consisting of a fixed machine and a rotary machine faced to each other. A notch through which a spherical body enters and outs is formed in the fixed machine and the spherical body is fed in a space between the running grooves of the lapping machines through the notch of the fixing machine through a chute 7. In a so formed chute device, the chute 7 is formed such that a recessed part 7c to store the spherical bodies is formed between a chute 7b being a slope plane and a grooved chute 7a on the tip side thereof. The spherical body flowed from an upper part is stored in the recessed part 7c and a spherical body feed amount is regulated throughout the whole width of the chute.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example,
A sphere supply chute device for stably and uniformly pouring the sphere material into a lapping machine composed of a rotating plate and a fixed plate in a device for processing by inserting a sphere material between concentric running grooves attached to two lapping machines. It is about.

[0002]

2. Description of the Related Art A lapping process of a sphere is a method of processing by inserting a sphere material between concentric running grooves provided on two facing lapping machines, and as shown in FIG. One is a rotary disk 2 and the other is a fixed disk 1. A sphere B flows between the two, and is wrapped by moving through the two disks 1 and 2.

[0003] When the turntable 2 makes one rotation, the sphere in the turntable becomes
The sphere B in the conveyor is discharged to the rotating conveyor 5 and flows into the board again by the rotation of the conveyor 5. The sphere is lapped by this repetition. Therefore, the processing is performed in lot units, and the processing weight is determined by the size of the ball.

The fixed platen 1 has a notch for the sphere B to enter and exit, and the sphere B is guided to the concentric running grooves 4 attached to the lapping plates 1 and 2 as shown in FIG. A chute 7 ′ having a groove in accordance with the groove 4 of the lapping machine is used. The chute 7 ′ allows the sphere to be sent from the notch 3 of the fixed plate 1 to the lapping machine, After the emerged sphere B rolls on the chute 7'b of the inclined plane of the chute 7 ', it rolls on the grooved chute 7'a and enters the lapping machine. In the above case, the shape, number, and pitch of the grooves are appropriately determined according to the size of the processing sphere.

[0005]

However, when the spheres are poured into the lapping machine, the spheres in the conveyor 5 usually form a layer. If it does not enter the address smoothly, scratches will occur.

Therefore, in the chute 7 ', as the sphere rolls, the layer of the sphere gradually disintegrates and gradually becomes thinner.
At the end, an attempt was made to become one step
The shape of the protrusion of the side plate, the angle of inclination of the chute 7, and the like have been determined in consideration of how the sphere collapses into one step.

However, the conventionally used chute 7 'has a straight plane shape having an inclination angle as shown in FIG. 5, and has no function of adjusting the amount of inflow. However, the direction in which the sphere flows is determined only by rolling naturally on the slope of the chute 7 ', and does not change midway.

Further, the sphere B coming out of the conveyor 5 is discharged to the fan-shaped chute 8 while exerting a moving force toward the partition plate 6 fixed to the outer wheel of the conveyor, so that the sphere B is equally distributed in all the grooves of the grooved chute 7a. The sphere is difficult to flow, and it tends to flow to the center of the board. For this reason, the amount of inflow into each groove is not uniform, but varies, and various measures have been taken as a method of improving this.

For example, the shape of the protrusion of the side plate of the fan-shaped chute 8 and the method of flowing the lap liquid have been devised.
No suitable way found. Therefore, the amount of spheres flowing in each groove varies widely, and the number of times each sphere passes through the board varies. As a result, the spheres are polished by a fixed amount each time they pass through the board, but if there is a large difference in the number of times each sphere passes through the board, the difference between lots will increase and the quality of the spheres will deteriorate. Did not escape.

[0010] The present invention addresses the above-mentioned situation, and focuses on the shape of the chute to solve the problem, thereby making the flow of the spheres into each groove uniform, and the variation in the number of times each sphere passes between the lapping machines. It is an object of the present invention to reduce the number of passes and increase the number of passes through the board, thereby shortening the processing time and improving the processing accuracy.

[0011]

That is, a feature of the present invention that meets the above-mentioned object is that the present invention comprises a stationary disk and a rotating disk which face each other.
A concentric running groove is provided on the mating surface of the two lapping machines, and a cutout for a sphere is provided in a part of the fixed board. In a chute device for feeding a sphere between running grooves, the chute is formed by providing a concave portion for pooling the sphere between a chute having an inclined plane and a grooved chute on the tip side thereof, and the sphere flowing from a good side is formed. The point is that the pool is pooled in the concave portion and the amount of the sphere fed is adjusted for the entire width of the chute.

[0012]

When the chute device of the present invention is used, the spheres that have flowed vigorously from the conveyor are braked by the presence of the concave portion, and the spheres that have flowed more move to the side that has less flow. Are uniformly arranged in one step.

When the sphere flows into the grooved chute on the tip side in a state where the sphere is laid one step over the entire width of the chute, the sphere flows in the same manner in any groove, and the amount of flow is uniform. It becomes a state close to. Therefore, variation in the number of times of passing through the lapping machine is reduced, and as a result, the total number of passing through each groove of the board increases, and the processing time is shortened.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 3 shows an example of a chute device according to the present invention. One of the laps shown in FIG. 1 and FIG. The sphere B coming out of the conveyor 5 is used by being arranged in a notch 3 provided in a part of the fixed plate 1 for guiding the sphere to a concentric running groove 4 attached to the lapping machine. Fan-shaped chute 8 and chute 7 via plate 6
To the lapping machine, the lapping process is performed by moving between the two lapping machines 1 and 2, and when the rotating disc 2 rotates once, the lapping machine 2 is discharged to the conveyor 5 through the discharge chute 9. It is the same as in the prior art that the ball is sent again to the board, and this is repeated to perform the lap processing of the sphere.

However, the chute 7 according to the present invention has only
A concave portion 7c is formed between the inclined chute 7b and the grooved chute 7a as shown in FIG. 7, and the sphere B flowing through the chute 7b is pooled so as to be in the same state for the entire width of the chute 7, and the grooved chute 7a Are arranged so that the spheres flow evenly in all the grooves. In this case, the depth, shape, and inclination angle of the dent of the concave portion 7c are determined by an optimum shape according to the material and diameter of the sphere because the weight of the sphere occupies a large factor.

By the way, due to the presence of the concave portion 7c, the spheres which have flowed vigorously from the conveyor 5 are braked, and the spheres which have flowed more move to the side which has less flow, so that the spheres are uniformly arranged in one row over the entire chute width. However, if the sphere is braked too much, the rolling of the sphere will become worse, the sphere that has flowed later will ride on the previous sphere, and the sphere will not flow neatly in one step, If the braking effect is poor, the speed at which the spheres flow is high, so that the amount of movement in the lateral direction in the concave portion 7c is small, and the spheres are not evenly arranged in one row, so that the depth, shape, and inclination angle of the dents are reduced. Selection is important.

To explain this further, as shown in FIG.
The flat part of the chute entrance is at a slight angle θ ₁Is attached,
Accelerate the sphere coming out of conveyor 5
It accelerates further at the entrance of 7c. The center of the recessed part 7c
After the section, the sphere is uniformly spread over the entire surface of the chute 7 while decelerating.
So that the spheres flow uniformly into the grooves.

Therefore, the dimensions of the respective parts are determined so that the spheres are closely arranged in one step in the concave portion 7c and flow into the lapping machine as soon as possible without remaining in the concave portion. Of the dimensions of each part, the most important dimension is the grooved chute 7a of height H ₁ and gradient theta _2, too high sphere sphere stays in the recess taking too much brake, and an excessively low sphere Flows through the groove with the bias. If the radius of curvature R of the concave portion is small, the function of correcting the deviation of the sphere is small, and if it is large, the flow of the sphere is obstructed and stays, so that the amount of the sphere flowing into the board is reduced. Position of the recess, good will be processed by weight volume of the sphere is reduced in too close to the (conveyor side) becomes too large height H ₂ of the chute conveyor is low, close to the poor (the fixed platen side) If it is too long, the chute groove portion becomes too short, and it becomes difficult for the chute to flow one by one in the board. Therefore, the dimensions of each part must be determined in consideration of these conditions. In order to finally determine the dimensions of each part, it is preferable to determine the flow by confirming the flow by flowing spheres of each size.

FIG. 4 shows another embodiment in which the chute device shown in FIG. 3 is developed.
A slit 10 is provided in a portion continuing from b to the concave portion 7c, so that a sphere smaller than the main body and foreign matter can be easily removed.

That is, the width of the slit 10 is made smaller than the diameter of the sphere of the main body, and the sphere of the main body passes through the slit 10 without falling, but a sphere or foreign matter smaller than the main body does not pass. If attached to a part, clogging of the sphere at the part flowing into the board or spheres of a different size smaller than the sphere of the main body which hinders smooth flow of the sphere and foreign matters can be advantageously removed.

The different-sized spheres, foreign matter, etc. that have fallen from the slit 10 fall into the lower hole 11 and are taken out. As the number of the slits 10 increases, the possibility that abnormal ones are selected increases. Therefore, it is necessary to determine the pitch A of the slits 10 in consideration of the strength. In FIG wales, the radius of curvature R is increased somewhat compared to Figure 3, the height of the grooved chute 7a H ₁
Is formed rather稍短, as appropriate in consideration of the dimensions, such as height H ₁ of curvature radius R and the grooved chute makes it flow smoothly sphere, is a described above be set .

Thus, the lapping is performed on the spheres by repeating the flow from the conveyor 5 through the fan-shaped chutes 8 and the chutes 7 to the lapping machine and from the discharge chute 9 to the conveyor 5 to wrap the spheres. Of the sphere can be efficiently wrapped by minimizing the variation of the sphere.

[0024]

According to the present invention, when a sphere is poured and supplied between a fixed plate and a rotary plate as described above, a concave portion is provided in a part of the chute, the sphere is pooled there, and the groove of the grooved chute is formed. The spheres flowing from the conveyor are braked by the recess, and the spheres on the side that has flowed more move to the side that has less flow, averaging over the entire width of the chute, and uniformly in one row Since the balls are arranged side by side, the variation in the number of passes through the discs of each sphere is reduced, the difference between lots can be reduced, and the number of passes through the discs becomes uniform, and as a result, each groove of the disc becomes The total number of passages increases. Considering this from the force applied to one sphere, the fact that there is little variation in the spheres flowing into the board means that many spheres are evenly contained in the board, and the total processing pressure is the same as before. In this case, the pressure applied to each sphere becomes smaller. Therefore, although the amount of polishing when passing through the board is reduced, the processing time is not significantly changed because the number of times of passing through the board is increased. That is, if the polishing amount when passing through the board is the same as the conventional one, the processing time is shortened, and if the processing time is the same as the conventional one, there is an effect that the polishing amount per passing through the board can be reduced. . Therefore, different effects can be obtained for each of the spheres by using different processing methods according to the sphere to be processed. That is, in the pre-process or the final process of a low-grade product that does not require much processing accuracy, the effect of being able to obtain high-precision quality is expected by reducing the polishing amount and performing finishing.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outline of a spherical wrapping machine using a chute of the present invention.

FIG. 2 is a schematic plan view showing a state of supply and discharge of a sphere by the chute of FIG. 1;

FIG. 3 is a perspective view showing an example of a chute device according to the present invention.

FIG. 4 is a perspective view showing another embodiment of the chute device according to the present invention.

FIG. 5 is a perspective view showing an example of a conventional chute device.

[Explanation of symbols]

 B Sphere 1 Fixed board 2 Rotating board 3 Notch 4 Running groove 5 Conveyor 6 Partition plate 7 Chute 7a Grooved chute 7b Inclined plane chute 7c Concave section 8 Fan-shaped chute 9 Discharge chute 10 Slit 11 Hole

Claims (1)

[Claims] 1. A concentric running groove is provided on a facing surface of two lapping machines comprising a fixed board and a rotating board which face each other, and a cutout for allowing a sphere to enter and exit is provided on a part of the fixed board. In a chute device for feeding a sphere from a notch of a fixed board to a running groove of a lapping machine by a chute according to a groove, the chute is pooled between a chute of an inclined plane and a grooved chute on the tip side thereof. A sphere supply chute apparatus characterized in that a sphere which flows from a well is formed by providing a concave portion to be formed, and the sphere feeding amount is adjusted for the entire width of the chute.