JP5771000B2 - Double-head surface grinding method and double-head surface grinding machine - Google Patents

Description

  The present invention relates to a double-head surface grinding method and a double-head surface grinding machine using a carrier-through grinding method, so that a plurality of workpieces can be put in one carrier pocket in the carrier transport direction and carrier-through grinding can be performed to shorten the cycle time. It is a thing.

  As a grinding method for through-feed grinding of both end faces of a workpiece with a pair of grinding wheels of a double-head surface grinder, there is a carrier-through grinding method including a carrier that passes between a pair of grinding wheels.

  In this carrier-through grinding method, conventionally, a carrier disk method (Patent Document 1 and Patent Document 2) provided with a carrier disk that rotates about an axis substantially parallel to the grinding wheel, and an endless belt such as a thin steel plate are used. And an endless belt system (Patent Document 3).

  In the carrier disk system of Patent Document 1, a pocket that is slightly larger than the work is disposed on the outer periphery of the carrier disk, and the work put in and held in this pocket is passed between grinding wheels by rotation of the carrier disk. It is like that. Further, the carrier disk system of Patent Document 2 includes a carrier disk having a recessed pocket formed on the outer periphery thereof, and a guide rail disposed on the outer periphery of the carrier disk, and the work in the pocket is transferred to the carrier. By rotating the disk, it passes between the grinding wheels along the guide rail.

  The endless belt system of Patent Document 3 includes an endless belt wound between guide wheels on both sides of a grinding wheel so that a work held in a pocket of the endless belt is passed between the grinding wheels by rotation of the endless belt. It has become.

Japanese Unexamined Patent Publication No. 1-310852 JP-A-11-207578 JP-A-9-192993

  The cycle time of the carrier-through method is determined by the number of carrier pockets and the carrier speed, but the conventional method has a drawback that it is difficult to shorten the cycle time. That is, even if the number of pockets is increased in order to shorten the cycle time, there is a limit naturally because the size of the carrier is limited by the machine size.

  Further, if the carrier speed is increased, it is necessary to use an expensive servo motor or the like as a carrier driving means, which causes a problem in terms of cost. Moreover, while making the pockets slightly larger than the size of the work, it is easy to put in the work, but even if the carrier speed is increased, one work is put in each pocket, so There is a limit from the input side. Therefore, with the conventional carrier-through method, it is difficult to shorten the cycle time in terms of cost and input.

  In view of the above-described conventional problems, the present invention provides a double-head surface grinding method and a double-head surface grinding method that can easily and quickly put a work into a pocket and can efficiently grind the work and reduce cycle time. The purpose is to provide a board.

In the double-head surface grinding method according to the present invention, when carrying out carrier-through grinding of both ends of a work held in a carrier pocket with a pair of grinding stones, a single pocket penetrating the carrier is formed in the carrier transport direction. a plurality of work was put, it is to grind while pushing align the respective workpiece without a gap continuously shaped in the carrier conveying direction by the carrier.

  It is desirable that the grinding wheel and the carrier rotate in opposite directions in a grinding part for grinding the workpiece by the grinding wheel. Further, it is desirable that after the predetermined number of the workpieces are put into the pocket, the workpiece on the tip side in the pocket is pushed into the grinding portion.

The double-sided surface grinder according to the present invention is a double-sided surface grinder that carries out carrier-through grinding of both end surfaces of a work held in a carrier pocket with a pair of grinding wheels, and a plurality of works are loaded into the carrier in the carrier conveying direction. It is formed by penetrating possible pockets, and the workpieces put in the pockets are pushed in between the grinding wheels in a continuous manner without gaps in the carrier conveying direction .

  The carrier may include a rotating body, and the rotating body may be provided with a plurality of pockets in the circumferential direction in which a plurality of workpieces can be put in the circumferential direction. The rotating body has a plurality of claw portions arranged in the circumferential direction at intervals of the pockets, and is arranged substantially concentrically on the rotating body, and each workpiece in the pocket between the claw portions is arranged. It may be provided with a guide rail for guiding in the circumferential direction.

  The rotating body may be a carrier disk having a claw portion on the outer periphery, and the guide rail may be fixedly disposed on the outer periphery of the carrier disk. The grinding wheel and the carrier that rotate about a lateral axis may be provided, and an input portion may be arranged at a position where a predetermined number of workpieces can be input into the pocket while the pocket rotates downward. .

  According to the present invention, a plurality of workpieces are placed in one carrier pocket in the carrier conveyance direction, and the workpieces are aligned in a continuous manner without any gaps by the carrier and ground while being pushed in. There is an advantage that the workpiece can be ground quickly and the workpiece can be ground efficiently, and the cycle time can be shortened.

1 is a front view of a horizontal double-sided surface grinding machine showing a first embodiment of the present invention. It is the same side view. FIG. 2 is an enlarged sectional view taken along line XX in FIG. 1. It is a front view of the horizontal type double-head surface grinding machine which shows the 2nd Embodiment of this invention. It is the same side view. It is a front view of the horizontal type double-head surface grinder which shows the 3rd Embodiment of this invention. It is a front view of the horizontal type double-sided surface grinder which shows the 4th Embodiment of this invention. It is a front view of the horizontal type | mold double-sided surface grinder which shows the 5th Embodiment of this invention. It is a front view of the horizontal type | mold double-sided surface grinder which shows the 6th Embodiment of this invention. It is the same side view.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 3 illustrate a horizontal double-sided surface grinder that employs the present invention. As shown in FIGS. 1 and 2, this horizontal double-sided surface grinding machine includes a pair of grinding wheels 1 rotating in the direction indicated by the arrow A around a lateral axis and a grinding part of a pair of grinding wheels 1. And a carrier 3 that conveys the workpiece W in the direction indicated by the arrow B around the axial center in the horizontal direction. The grinding wheel 1 and the carrier 3 are arranged on the left and right. The grinding wheel 1 conveys the workpiece W in the downward A arrow direction at the grinding portion 2 and the carrier 3 in the upward B arrow direction at the grinding portion 2.

  The carrier 3 has a plurality of pockets 4 in the circumferential direction (carrier transport direction) on the outer peripheral portion, and holds a plurality of workpieces W placed in each pocket 4 by the throwing portion 5, and between the grinding wheels 1. While pushing the workpieces W in the direction indicated by the arrow B in a state where they are continuously aligned with the grinding unit 2 without gaps, carrier-through grinding is performed by grinding the both end surfaces of each workpiece W substantially in parallel with the pair of grinding wheels 1. The ground workpiece W is discharged from each pocket 4 by the discharge portion 6.

  Each grinding wheel 1 is provided at the opposite end of the grinding wheel shaft 7 arranged in the lateral direction, and rotates in the direction indicated by the arrow A. Both grinding wheels 1 are arranged with a slight inclination so that the outlet 8 side of the grinding portion 2 matches the finished dimension between both end faces of the workpiece W, and the inlet 9 side is slightly wider than the outlet 8 side.

  The carrier 3 has a carrier disk 10 that rotates in the direction indicated by the arrow B around the lateral axis, and a guide rail 11 that is arranged on the fixed side substantially concentrically on the outer periphery of the carrier disk 10. The carrier disk 10 is provided with claw portions 14 projecting outward in the radial direction in a substantially equal distribution in the circumferential direction, and there is one between the pair of claw portions 14 adjacent to each other in the circumferential direction of the carrier disk 10. The pockets 4 are formed, and the workpieces W are sequentially pushed into the grinding part 2 between the grinding wheels 1 by the claw part 14 on the rear side of each pocket 4.

  Each pocket 4 is formed in an arc shape on substantially the same circumference so that a plurality of workpieces W can be inserted in the circumferential direction, and each workpiece W in this pocket 4 is guided by a guide rail 11. The length in the circumferential direction of the pocket 4 is slightly longer than the length when a plurality of workpieces W are continuously aligned without gaps in the circumferential direction in order to facilitate the insertion of the workpiece W into the pocket 4. ing. The guide rail 11 is provided in a ring shape surrounding the carrier disk 10 from the outer periphery.

  The insertion portion 5 is disposed in a downward rotation area in which the pocket 4 rotates downward from the uppermost position a to the lowermost position b opposite to the grinding wheel 1 with respect to the carrier disk 10, and the pocket 4 is rotated by the rotation of the carrier disk 10. While the leading end side of the sheet is rotated to the lowest position b, a predetermined plurality of workpieces W are loaded into the pocket 4 by the loading means 12 of the loading unit 5, and each loaded workpiece W is moved to the front side (lower side) in the rotation direction. ) Of the claw portions 14). The insertion portion 5 is configured such that a part of the guide rail 11 is notched and the workpiece W is input by the radially outward input means 12 so that the workpieces W are aligned in the pocket 4 by their own weight. .

  In this embodiment, since the claw portions 14 of the carrier disk 10 are equally arranged, the insertion portion 5 has an arc direction of one pocket 4 from the lowest position b to the rear side (upper side) of the rotation direction of the carrier disk 10. It is arranged at a position more than the length of. In addition, if the insertion part 5 is arranged in the downward rotation area of the pocket 4 and at a position away from the lowest position b by the length of at least one pocket 4 on the upper side, the workpiece W is utilized by its own weight. Can be quickly put into the pocket 4.

  The discharge part 6 is arranged above the outlet 8 of the grinding part 2 of the grinding wheel 1 so that the work W in the pocket 4 is discharged one by one by the discharge means 13. As shown in FIGS. 2 and 3, there is a carrier disk 10 and a guide rail 11 between the charging unit 5 and the inlet 9 of the grinding unit 2 and between the outlet 8 of the grinding unit 2 and the discharge unit 6. Guide members 15 and 16 are provided on both sides of the pocket 4 therebetween, and the guide members 15 and 16 prevent the workpiece W in the pocket 4 from dropping off.

  The outer peripheral surface 10a of the pocket 4 of the carrier disk 10 and the inner peripheral surface 11a of the guide rail 11 are substantially concentric, and the dimension in the radial direction of both of them is slightly larger than the outer diameter of the workpiece W or is charged. The interval is such that the work W can be loaded with a certain margin with respect to the pocket 4 at the portion 5. The guide rail 11 need only be in a range from at least the input portion 5 through the grinding portion 2 to the discharge portion 6, and need not be provided on the entire circumference.

  In this horizontal surface grinding machine, when grinding both end faces of the workpiece W, a plurality of workpieces W are introduced into the respective pockets 4 of the carrier-through type carrier 3 in the circumferential direction, and each of the workpieces is rotated by rotation of the carrier disk 10. Through-feed grinding is performed while pushing the workpiece W continuously in the circumferential direction without gaps.

  When the workpiece W is loaded from the loading section 5, the workpiece W enters the pocket 4 on the outer periphery of the carrier disk 10, and the workpiece W can be sequentially loaded into the pocket 4 as it rotates in the direction indicated by the arrow B. it can. In addition, since a plurality of workpieces W are continuously put into one pocket 4, a large number of workpieces W can be put into the pocket 4 easily and quickly at a loading speed corresponding to the rotational speed of the carrier disk 10. In addition, by continuously loading a plurality of workpieces W into one pocket 4, it is not necessary to increase the transport speed of the carrier 3 as in the case of loading one workpiece W into each pocket 4, and for carrier driving. In addition, since an expensive servo motor or the like is not required, the cost can be reduced.

  By the time the workpiece W on the front end side in the rotational direction in the pocket 4 reaches the lowest position b, the insertion of a predetermined number of workpieces W into the pocket 4 is completed. After the workpiece W at the tip of the pocket 4 passes through the lowest position b and comes into contact with the inlet 9 side of the grinding portion 2 between the grinding wheels 1, the workpiece W in the pocket 4 is rotated by the rotation of the carrier disk 10. It is pushed in by the claw part 14 on the rear side while resisting the rotational force of 1.

  Accordingly, the workpieces W in the pocket 4 pass through the grinding part 2 in a state of being continuously arranged without gaps, and both end surfaces of the workpiece W are ground substantially in parallel by the grinding wheels 1. For this reason, by putting a plurality of workpieces W into one pocket 4 and grinding, the same effect as when the number of pockets is increased can be obtained, and the workpiece W can be ground with high efficiency. It can be shortened.

  When the workpiece W is close to the outer circumferential surface 10a of the carrier disk 10 and the inner circumferential surface 11a of the guide rail 11 with a slight gap, the workpieces W in the pocket 4 are aligned in a line on substantially the same circumference. However, when the dimension between the outer peripheral surface 10a of the carrier disk 10 and the inner peripheral surface 11a of the guide rail 11 is sufficiently larger than the outer diameter of the workpiece W, it contacts the outer peripheral surface 10a of the carrier disk 10. The workpiece W and the workpiece W contacting the inner peripheral surface 11a of the guide rail 11 are arranged in two rows according to the dimensional difference, such as being alternately arranged in the circumferential direction, but there is no particular problem.

  Further, after all the predetermined plurality of workpieces W have been put into the pockets 4 between the claw portions 14, the workpieces W on the leading end side in the pockets 4 enter between the pair of grinding wheels 1, so A plurality of workpieces W in the pocket 4 can be pushed between the grinding wheels 1 by the subsequent claw portions 14 from the time when the workpiece W begins to enter the grinding portion 2 of the grinding wheel 1. For this reason, during the grinding of the workpieces W in the grinding unit 2, the workpieces W in the pockets 4 can be continuously aligned without gaps, and the grinding conditions for the workpieces W can be made substantially the same.

  When the rotation direction of the grinding wheel 1 in the grinding unit 2 is the same as the conveyance direction of the carrier 3, the workpiece W in the pocket 4 is affected by the rotational force of the grinding wheel 1 and the rotation of the grinding wheel 1. The posture of the work W in the pocket 4 is disturbed as it tries to move around in the direction, and the passing speed of the work W becomes irregular, resulting in variations in dimensions and parallelism. However, since the rotation direction of the grinding wheel 1 in the grinding part 2 and the conveyance direction of the carrier 3 are opposite to each other, such a problem does not occur.

The work W that has passed between the grinding parts 2 of the grinding wheel 1 is discharged from the pocket 4 by the discharge part 6, but the work W is put into the pocket 4 by the input part 5 arranged on the downward rotation area side of the pocket 4 and ground. By adopting a carrier-through method in which the work W in the pocket 4 is discharged by the discharge part 6 disposed above the outlet 8 of the part 2 , the work W loading, conveying, and discharging apparatus can be simplified. For this reason, an installation space becomes small and the whole machine can be reduced in size.

  In addition, since a plurality of workpieces W continuously pass through the grinding part 2 of the grinding wheel 1 without a gap, when a superabrasive wheel such as a CBN wheel is used as the grinding wheel 1, the material of the grinding wheel 1 and Together, the dress interval can be extended, so that the overall machine can be further downsized.

  4 and 5 illustrate a second embodiment of the present invention. The carrier 3 of this embodiment includes a ring-shaped carrier disk 10 having a claw portion 14 on the inner periphery, and a guide rail 11 that is arranged and fixed substantially concentrically on the inner periphery of the carrier disk 10. Yes. The input of the work W at the input unit 5 and the discharge of the work W at the discharge unit 6 are performed from the side surface of the carrier disk 10. The guide rail 11 may be disk-shaped or ring-shaped. When the guide rail 11 is ring-shaped, as shown by a two-dot chain line in FIG. 4, the insertion portion 5 inputs the workpiece W from the inner peripheral side of the guide rail 11, and the discharge portion 6 sets the inner periphery of the guide rail 11. The workpiece W may be discharged to the side. Other configurations are the same as those of the first embodiment.

  As described above, the claw portion 14 and the pocket 4 may be provided on the inner peripheral side of the carrier disk 10, and each work W in the pocket 4 may be guided from the inner peripheral side by the guide rail 11. Therefore, the carrier disk 10 and the guide rail 11 may be arranged either inside or outside.

  FIG. 6 illustrates a third embodiment of the present invention. In this embodiment, the carrier 3 includes a carrier disk 10 on the inner peripheral side and a guide rail 11 disposed on the outer periphery of the carrier disk 10, and the carrier disk 10 is equally spaced in the circumferential direction. A claw portion 14 is provided.

  In the downward rotation area of the pocket 4, the charging unit 5 has a number N1 of workpieces W from the lowest level b to the loading unit 5 side larger than the number N2 of workpieces W from the lowest level b to the grinding unit 2 side. 4 is arranged at a position where the workpiece W has been thrown in before the workpiece W on the tip side reaches the grinding part 2. Other configurations are the same as those of the first embodiment.

  As described above, when the grinding unit 2 inputs the workpiece W from the input unit 5 on the opposite side, the input unit 5 is provided at a position satisfying the relationship of N1> N2, so that the grind unit 2 applies to the pocket 4 while utilizing its own weight. The workpiece W can be loaded, and the larger the difference between the two, the more efficiently it can be supplied until the loading is completed.

  Therefore, when the number of workpieces W in one pocket 4 is relatively small, the workpieces W can be efficiently loaded by arranging the loading unit 5 as in the first and second embodiments. If the number of workpieces W in the pocket 4 is increased, it is possible to arrange the input unit 5 at a position as in this embodiment.

  FIG. 7 illustrates a fourth embodiment of the present invention. In this embodiment, the carrier 3 includes a carrier disk 10 on the inner peripheral side and a guide rail 11 disposed on the outer periphery of the carrier disk 10. The grinding wheel 1 rotates upward in the direction indicated by the arrow A on the grinding unit 2 side, and the carrier disk 10 rotates downward on the side of the grinding unit 2 in the direction indicated by arrow B.

  The input part 5 is provided in a downward rotation area between the uppermost a of the carrier disk 10 and the grinding part 2, and the discharge part 6 is rotated downward between the lowermost b of the carrier disk 10 and the grinding part 2. It is provided in the area. The input portion 5 is arranged from the inlet 9 of the grinding portion 2 to the uppermost a (upper) side with an interval equal to or longer than the length of one pocket 4 in the circumferential direction. A predetermined number of workpieces W have been thrown in before contacting the grinding part 2. Other configurations are the same as those of the first embodiment.

  As shown in this embodiment, the grinding wheel 1 is rotated upward and the pocket 4 is rotated downward on the grinding part 2 side, and the input part 5 is discharged upward and the grinding part 2 is discharged downward. Even when the portions 6 are arranged, the same effects as those of the first embodiment can be obtained. In particular, in this case, there is an advantage that the workpiece W can be input by the input unit 5 and the workpiece W can be discharged by the discharge unit 6 using the weight of the workpiece W.

  In this case as well, the carrier disk 10 may be disposed on the outer periphery and the guide rail 11 may be disposed on the inner periphery as in the second embodiment.

  FIG. 8 illustrates a fifth embodiment of the present invention. The carrier 3 of this embodiment includes a carrier disk 10, and the carrier disk 10 is provided with a plurality of long hole-like pockets 4 elongated in the circumferential direction on substantially the same circumference of the outer periphery. Each pocket 4 can be loaded with a plurality of workpieces W in the circumferential direction, the workpiece W is loaded into the pocket 4 by the loading unit 5, and the workpiece W in the pocket 4 is discharged by the discharge unit 6. Other configurations are the same as those of the first embodiment.

  Even when the pocket 4 is formed in the carrier disk 10 by an arc-shaped long hole as in this embodiment, a plurality of workpieces W are put in the pocket 4 in the circumferential direction, and the circumferential direction is continuous without gaps. The workpiece W can be pushed between the grinding wheels 1 in a state where they are aligned with each other. Note that the grinding wheel 1, the rotation direction of the carrier 3, and the positions of the input unit 5 and the discharge unit 6 may be as in the fourth embodiment.

  9 and 10 illustrate a sixth embodiment of the present invention. This embodiment illustrates a horizontal double-sided surface grinder that employs an endless belt system. The carrier 3 is constituted by an endless belt 18 that is wound around guide wheels 17 on both upper and lower sides of the grinding wheel 1 and passes through the grinding portion 2 between the grinding wheels 1. The endless belt 18 is provided with long hole-like pockets 4 in which a plurality of workpieces W can be put in the longitudinal direction of the belt at equal intervals in the longitudinal direction of the belt. Opposite to the rotating grinding wheel 1, it rotates in the downward B arrow direction.

  The throwing portion 5 is disposed in the downward rotation region at a position separated from the grinding portion 2 by at least the length of at least one pocket 4, and after the predetermined number of workpieces W have been thrown into the pocket 4, the endless belt 18 rotates. Thus, the work W is pushed into the grinding part 2. The discharge part 6 is arranged on the lower side of the grinding part 2. Further, guide members 15 and 16 for preventing the workpiece W from dropping off are provided on both sides of the endless belt 18 as necessary.

  Also in this case, when a plurality of workpieces W are put into each pocket 4 of the endless belt 18, the workpieces W in the pocket 4 are continuously aligned with no gap in the traveling direction of the endless belt 18 and pass through the grinding part 2. To do. Therefore, even when the endless belt type carrier 3 is adopted, the pocket 4 can be easily implemented by making it into a long hole shape.

  As mentioned above, although each embodiment of this invention was explained in full detail, this invention is not limited to these embodiment, A various change is possible in the range which does not deviate from the meaning of this invention. For example, in each embodiment, the case where the grinding wheel 1 and the pocket 4 rotate in the reverse direction on the grinding unit 2 side is illustrated, but the work W in the pocket 4 is rotated by the rotational force of the grinding wheel 1. When grinding a workpiece W having a shape and structure that can be prevented, both the grinding wheel 1 and the carrier disk 10 rotate downward or upward on the grinding part 2 side so that both rotate in the same direction. May be.

  In the case of the rotary carrier 3, the carrier disk 10 is most commonly used, but it is not necessary to be a disk-shaped carrier disk 10 using a plate material, and the distance between the pair of grinding wheels 1. A thinner rotating body is sufficient.

  The pocket 4 is sufficient as long as it allows a plurality of workpieces W to be aligned continuously without gaps in the traveling direction (conveying direction) when passing through the grinding part 2, and the shape thereof is the shape of the target workpiece W. It can be changed appropriately according to the structure. For example, in the case of the rotary carrier 3, each of the pockets 4 is formed when the workpiece W has a cylindrical shape or the like so that the plurality of workpieces W are aligned in the circumferential direction on substantially the same circumference of the carrier disk 10. However, if the pockets 4 are generally located on the same circumference, a portion of the pocket 4 meanders due to the shape, structure, etc. of the workpiece W. It may be formed as described above.

  In addition, each embodiment exemplifies a horizontal double-sided surface grinder, but if a plurality of workpieces W can be put in the pocket 4 of the carrier 3 in the carrier conveyance direction, the vertical double-sided surface grinder is similarly used. It can be implemented.

DESCRIPTION OF SYMBOLS 1 Grinding wheel 2 Grinding part 3 Carrier 4 Pocket 5 Input part 6 Discharge part 10 Carrier disc 11 Guide rail 14 Claw part W Workpiece

Claims (8)

When carrying out carrier-through grinding on both ends of the workpiece held in the carrier pocket with a pair of grinding wheels,
Put a plurality of workpieces in the carrier transport direction in one pocket formed through the carrier,
A double-head surface grinding method, wherein the workpieces are ground while being pushed in line by aligning the workpieces in the carrier transport direction without gaps. The double-head surface grinding method according to claim 1, wherein the grinding wheel and the carrier rotate in opposite directions in a grinding part that grinds the workpiece by the grinding wheel. The double-sided surface grinding method according to claim 1 or 2, wherein after the predetermined number of the workpieces have been put into the pocket, the workpiece on the tip side in the pocket is pushed into the grinding portion. In a double-head surface grinding machine that carries out carrier-through grinding of both end faces of a work held in a carrier pocket with a pair of grinding wheels,
Forming through the pocket through which a plurality of workpieces can be put in the carrier conveying direction in the carrier,
The double-head surface grinder characterized in that the workpieces placed in the pockets are pushed in between the grinding wheels in a continuous manner without gaps in the carrier conveying direction. The carrier includes a rotating body,
The double-sided surface grinder according to claim 4, wherein a plurality of pockets are provided in the circumferential direction in which a plurality of workpieces can be placed in the circumferential direction on the rotating body. The rotating body has a plurality of claw portions arranged in the circumferential direction at intervals of the pockets,
The double-head surface grinding machine according to claim 5, further comprising a guide rail arranged substantially concentrically on the rotating body and guiding each workpiece in the pocket between the claw portions in a circumferential direction. The rotating body is a carrier disk having a claw portion on the outer periphery,
The double-head surface grinder according to claim 6, wherein the guide rail is fixedly arranged on an outer periphery of the carrier disk. Comprising the grinding wheel and the carrier rotating around a lateral axis;
The double-head surface grinder according to any one of claims 4 to 7 , wherein a loading portion is disposed at a position where a predetermined number of workpieces can be loaded into the pocket while the pocket rotates downward. .

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