JPH0337771Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a rotating die holder, in which a thrust-type holder for a bearing is incorporated into the die holder in a die holder used when rotating the die to perform drawing operations, etc. By making the die holder itself move in the same way as a thrust bearing, and also fulfilling its original role as a die holder, the holder can be made cheaper, and the waste of the workpiece material can be reduced, and when machining due to chips, etc. This invention relates to a rotating die holder that eliminates troubles and improves work efficiency.

(Prior art) Traditionally, when performing drawing processes such as helical serrations, a die is rotated. In addition to applying a load in the drawing direction, it is also necessary to apply a load in the rotational direction perpendicular to the drawing direction.

Therefore, a rotary die was proposed in Japanese Utility Model Publication No. 37-21536.

This die has a rotating ball body with a ball receiving ring interposed as a thrust bearing in contact with both end faces of the die, and the die, ball receiving ring, and rotating ball body are all inserted into an outer shell body and held by a lid body. It is formed by inserting it.

(Problem that the invention aims to solve) However, in the case of this rotary die, when the die is inserted into the outer shell, the outer shell becomes larger due to the ball receiving ring and the rotating ball arranged on both end faces of the die. Become.

Therefore, there is a disadvantage that the tool mounting part of the drawing machine that sets the outer shell becomes even larger, and also, the chips during drawing are scattered between the rotary ball body on the press-in entrance side of the workpiece material, the lid body, or the die stand. This can cause problems such as chips getting stuck in between the chips and making it difficult to rotate the die table, so the work had to be done with great care.

Moreover, since the die stand and the die blade ring are located deep inside the outer shell body by at least the diameter of the rotating ball body, there is a problem that it is very difficult to insert the mouth part of the workpiece. When using two or more dies, there is a problem in that the part where the workpiece is joined must be made longer to accommodate the rotating ball between the dies, resulting in a large amount of wasted material.

Therefore, in view of the above-mentioned problems, this invention has been developed to reduce the cost of the holder when rotating the die and perform drawing processing, etc., and to reduce waste of material to be processed, and to reduce the amount of waste caused by chips, etc. It was devised to provide a rotating die holder that eliminates problems during machining and improves work efficiency.

(Means for solving the problem) This invention has a cylindrical shape with a bottom, a fine thread is carved on the inner periphery from the open end to the inner bottom surface, and a predetermined through hole is bored in the center of the inner bottom surface. On the inner bottom surface, there is a holder main body having a circular concave die holding part for rotatably holding a cylindrical die concentrically with the end face on the workpiece inlet side facing the through hole side, and An annular bearing thrust type holder that holds a rotating body that comes into contact with the end face on the exit side of the workpiece; The holder is rotatable in the circumferential direction concentrically with the cylindrical axis, and a guide groove is formed in which the rotating body is fitted so as to slightly protrude from the one end surface, and consists of a die holder with a predetermined through hole drilled therein, and the die is held inside the die holder on the outside of the die holder on the inner bottom surface of the holder body facing the end surface of the workpiece inlet side of the die. When the die holder is screwed in and tightened, the end face of the workpiece exit side of the die is in contact with the rotating body, and the die is rotated so that it can be rotated while maintaining it to the extent that there is no looseness. The above-mentioned problem is solved by protruding a gap adjustment screw that adjusts the screw-in state of the presser foot.

(Function) The rotating die holder according to this invention has a die attached to the die holding portion of the holder body, a thrust type holder for a bearing holding the rotating body fitted in the guide groove of the die holder, and A die holder is screwed into the holder body, and a rotating body slightly protruding from one end face of the die holder is brought into contact with the end face of the die on the exit side of the workpiece.

At that time, adjust the clearance adjustment screw in the tightening adjustment part so that it slightly protrudes from the inner bottom surface, and bring one end surface of the die holder into contact with this clearance adjustment screw to adjust the degree of approach of the die holder to the die. Adjust and tighten so that the gap between the inner bottom surface of the die holder and the rotating body slightly protruding from the die holder is adjusted so that the die can rotate freely within the holder body without play. It is something.

(Embodiments) Hereinafter, embodiments of this invention will be described with reference to the drawings.

Reference numeral 1 in the figure is a cylindrical holder body with a bottom, and a fine male thread 5 is threaded on the inner periphery from the open end 3 to the inner bottom surface 4, and a cylindrical die 2 is mounted on the inner bottom surface 4. A circular concave die holder 6 is provided to be rotatably mounted concentrically at the center of the holder body 1 so that the end surface 20 on the workpiece inlet side faces toward the bottom of the holder body 1 in the cylindrical shape with a bottom. .

A through hole 7 is bored in the center of the bottom surface of the circular concave die holding portion 6 to allow the material to be processed by the die 2 to be inserted therethrough.

In addition, two penetrating screw holes 8 are provided at locations on the inner bottom surface 4 of the holder body 1 on the outside of the die holding portion 6 from the outside of the bottom of the holder body 1 to the inner bottom surface 4 at approximately equal distribution in the circumferential direction. A clearance adjusting screw 9 is screwed into the through screw hole 8 and arranged so as to protrude from the inner bottom surface 4 toward the open end 3 of the holder main body 1. That is.

On the other hand, numeral 11 is a cylindrical die holder,
A male thread 12 is threaded on the outer periphery to be screwed into the fine male thread 5 of the holder main body 1, and a die holder 11 is screwed into the fine male thread 5.

Then, in this screwed state, the die presser 1 faces the die 2 side attached to the die holding part 6.
1 has a workpiece exit side end face which is concentric with the axis of the die holder 11 and whose depth is opposite to the workpiece entrance side end face 20 of the die 2. Rotating body 1 brought into contact with 19
A guide groove 15 slightly shallower than the diameter is carved in the groove 4.

Moreover, the guide groove 15 is provided with the rotating body 1
An annular bearing thrust type holder 13 holding an appropriate number of bearings 4 equally on the circumference is fitted and disposed so as to be rotatable in the circumferential direction, and the rotating body 14 is held in the guide groove 15 between the bearings. It is rotatably held by a thrust-type holder 13 and is formed so as to slightly protrude from one end surface of the die holder 11. Further, on the other end surface of the die holder 11, a hole 17 for tightening the die holder 11 is provided near the outer periphery.
A through hole 16 is provided through which the material to be processed by the die 2 can be inserted.

Then, the die 2 is attached to the die holding part 6 of the holder body 1, and the guide groove 15 of the die presser 11 is
A thrust type holder 13 for a bearing that holds a rotating body 14 is fitted into the holder body 1, and a die holder 11 is screwed into the holder body 1, and the rotating body slightly protrudes from one end surface of the die holder 11. 14 is brought into contact with the end surface 19 of the die 2 on the outlet side of the workpiece.

At this time, adjust the clearance adjustment screw 9 in the tightening adjustment part 10 so that it slightly protrudes from the inner bottom surface 4, and screw the screw to the degree that the clearance adjustment screw 9 comes into contact with the peripheral edge of one end surface of the die holder 11. By adjusting the degree of approach of the die holder 11 to the die 2, the gap between the inner bottom surface of the die holding part 6 and the rotating body 14 slightly protruding from the die holder 11 can be adjusted to 2 is adjusted and tightened within the holder body 1 so that it can rotate freely and without play.

That is, if the workpiece is inserted from the workpiece inlet side end face 20 side of the die 2 and the drawing process is performed, the die 2 always has its workpiece outlet side end face 19 rotated by the rotation of the die holder 11 during processing. body 1
4, and the die 2 inside the holder body 1
The position is determined by the position of the die holder 11. Therefore, by adjusting the protrusion degree of the clearance adjustment screw 9 to the inner bottom surface 4, the position of the die holder 11 is adjusted, and the gap between the workpiece inlet side end surface 20 of the die 2 and the inner bottom surface 4 is adjusted to eliminate play. If the die 2 is set so that it can rotate freely at a certain level, the die 2 will be able to rotate freely until it can be maintained to prevent chips etc.
It can be rotated without any chips or the like entering inside.

As shown in FIGS. 2 and 3, these assembled rotary die holders are mounted on the tool mounting section 18 of a drawing machine with the holder main body 1 side facing the workpiece insertion side, and the drawing process is performed. It is.

In this case, when drawing is performed by inserting the workpiece into the die 2 from the holder main body side, the die 2 is pressed in the die holding direction and the drawing load is applied only to the rotating body 14, as described above. There is almost no contact friction between the holder body 1 and the die 2, and the die 2 can easily rotate to form a helical groove or the like on the outer periphery of the workpiece.

In addition, if the shape of the die 2 is, for example, as shown in FIG. 2, if the center part of the end surface 20 on the inlet side of the workpiece is raised, the center part will not be raised even if the die is regrinded. Since the vines will be polished, the mounting width of the die 2 (thickness of the peripheral edge of the die 2) will not change at all, but the entire surface of the end face 20 of the die 2 on the workpiece entrance side as shown in Fig. 3 is one flat surface. In the case of It is difficult to adjust the width of the workpiece, and the gap between the inlet side end face 20 of the workpiece and the inner bottom surface becomes large, and chips, etc. enter the inside of the holder body 1, and the drawing process is interrupted by the chips. This is a major hindrance.

(Effect of the invention) This invention constructed as described above has a cylindrical shape with a bottom, a fine thread is carved on the inner periphery from the open end 3 to the inner bottom surface 4, and a predetermined through hole 7 is formed in the center of the inner bottom surface 4. At the same time as drilling, a cylindrical die 2 is placed on the inner bottom surface 4.
A holder main body 1 having a circular concave die holding portion 6 for rotatably holding the die concentrically with the workpiece inlet side end surface 20 facing the through hole 7 side.
, an annular bearing thrust type holder 13 that holds a rotating body 14 that comes into contact with the end surface 19 of the workpiece exit side of the die 2, and a screw carved into the outer periphery so that it can be screwed into the holder body 1. The holder 13 is rotatable in the circumferential direction concentrically with the cylindrical axis, and the rotating body 1 is arranged on one end face of the cylindrical shape.
4 is fitted with a guide groove 15 so as to slightly protrude from the one end surface, and also includes a die holder 11 with a predetermined through hole 16 drilled in the axis center, so that the number of parts can be reduced. Since the die holder 11 itself serves as a case for the bearing, no other thrust bearing is required and the holder itself can be made very small. If the holder itself can be made smaller, the length of the mouth portion of the material can also be shortened, which leads to material savings. In addition, if the holder itself becomes smaller, it becomes much easier to handle and can be processed in the same way as a die for linear processing, which shortens processing steps such as helical serrations and reduces costs. can.

Moreover, the holder main body 1 and the die presser 11
A fine thread screw 5, 1 with engraved on its outer diameter or inner diameter
2, which allows for fine adjustment and is extremely strong.The die holding portion on the inner bottom surface 4 of the holder body 1 facing the end surface 20 of the die on the workpiece inlet side On the outside of the die 6, when the die holder 11 is screwed in and tightened with the die 2 held in the die holding part 6, the end face 19 of the die 2 on the workpiece exit side and the rotary body 14 come into contact with each other. By protruding the clearance adjustment screw 9 that adjusts the threaded state of the die holder 11 so that the die 2 can be rotated while maintaining the die 2 in contact with the die 2 without play, the guide groove 15 is Presser foot 1
1 and fitting the thrust type holder 13 thereto, the clearance adjustment screw 9 to the inner bottom surface 4
By adjusting the degree of protrusion, the degree of screwing is adjusted so that the peripheral edge of the end surface of the die presser 11 comes into contact with the protruding clearance adjustment screw 9, and the degree of screwing is adjusted so that the end surface 20 of the die 2 on the workpiece inlet side and the inner bottom surface 4 are in contact with each other. If the gap is set so that the die 2 can rotate freely without play, the die 2 will be able to rotate without any chips entering inside until the die 2 can be maintained without any chips entering. It is something.

Then, if pressure is applied only in the direction of the die holder 11 during drawing, the die 2 can be moved to the rotating body 14.
Since the holder body 1 and the die 2 can be rotated with almost no friction because they are in contact and pressed only by the The rotation of the dice 2 is not adversely affected at all.

As explained above, according to this invention, the conventional die holder body, which had a large number of parts and was large, can be made smaller, and the problems caused by chips are reduced because chips do not get around. ,
Moreover, since the length of the gap can be minimized, it is possible to eliminate the waste of processing materials, and it also has practical effects such as shortening processing time and reducing costs. be.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is an exploded perspective view, Fig. 2 is a front view during drawing processing,
FIG. 3 is a front view of another embodiment during the drawing process, and the white arrow indicates the drawing direction. DESCRIPTION OF SYMBOLS 1... Holder body, 2... Dice, 3... Opening end, 4... Inner bottom surface, 5... Female thread, 6... Dice holding part, 7... Through hole, 8... Screw hole, 9... …
Gap adjustment screw, 10...Tightening adjustment part, 11...
...Die holder, 12...Male thread, 13...Thrust type holder, 14...Rotating body, 15...Guide groove, 16...Through hole, 17...Tightening hole, 18
...Tool mounting part, 19...Workpiece outlet side end surface,
20...End face on the inlet side of the workpiece.

Claims (1)

[Scope of utility model registration request] It has a cylindrical shape with a bottom, and a fine thread is carved on the inner periphery from the open end to the inner bottom surface, and a predetermined through hole is bored in the center of the inner bottom surface, and a cylindrical die is inserted into the inner bottom surface. A holder body having a circular concave die holding portion that rotatably holds the die concentrically with the end face on the material inlet side facing the through hole side, and a rotating body that abuts the end face on the workpiece exit side of the die. A circular thrust type holder for a bearing, and a cylindrical shape with a screw carved on the outer periphery so that it can be screwed into the holder body, and one end surface of the holder has the holder concentrically with the axis of the cylindrical shape. A die holder is provided, in which the tool is rotatable in the circumferential direction, and a guide groove is cut into which the rotating body is fitted so as to protrude slightly from the one end surface, and a predetermined through hole is bored in the axis center. On the outside of the die holding part on the inner bottom surface of the holder body facing the end face of the die on the workpiece inlet side, when a die holder is screwed in and tightened with the die held in the die holding part, Bringing the end surface of the workpiece exit side of the die into contact with the rotating body,
A rotating die holder characterized by protruding a clearance adjustment screw for adjusting the threaded state of a die holder so that the die can be rotated while maintaining it without play.