JPH10216889A - Manufacture of washer and device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain the manufacturing cost to low by reducing scrap quantity finally wasted. SOLUTION: A washer part 14a is heading-formed to the tip part of a blank 14 with a first die set for forming. The washer part 14a is punched out from the blank 14 shifted from the first die set for forming to a first die set for punching to manufacture a first washer 15. Successively, the washer part 14a is heading-formed to the tip part of the blank 14 shifted from the first die set for punching to a second die set for forming. The washer part 14a is punched out from the blank 14 shifted from the second die set for forming to a second die set for punching to manufacture the second washer 15. Further, the washer part 14a is heading-formed to the tip part of the blank 14 shifted from the second die set for punching to a third die set for forming. The washer part 14a is punched out from the blank 14 shifted from the third die set for forming to a third die set for punching to manufacture the third washer 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a washer, and more particularly, to manufacturing a plurality of washers from a single material, thereby reducing the amount of scrap finally discarded. The present invention relates to a method and an apparatus for manufacturing a washer as described above.

[0002]

2. Description of the Related Art In order to evenly distribute the pressure on the tightening surface of a bolt, nut or small screw, a washer inserted between the bolt, nut or small screw and the tightening surface is generally used. The washer is manufactured by stamping out a sheet material having a required thickness with a press.

[0003]

In the conventional method of manufacturing a washer, an annular washer is punched out of a plate of a required size, so that all of the plate cannot be used, resulting in wasted material.
There is a problem that many (scrap) occur. Further, the material punched to form the through holes of the individual washers also became scrap, and the amount of scrap generated from the raw material was about 50%. That is, it is pointed out that in the conventional method of manufacturing a washer, the amount of scrap finally discarded is extremely large, and the material cost increases.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems inherent in the method of manufacturing a washer, and has been proposed to appropriately solve the problem. It is an object of the present invention to provide a method and an apparatus for manufacturing a washer that can reduce the material cost at a low cost.

[0005]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and achieve the intended object, a method of manufacturing a washer according to the present invention is a method of manufacturing a washer, and can manufacture a plurality of washers. A material having a length dimension is supplied to a molding die set including a die and a punch, and a washer having a required diameter is forged at the end of the material by the die set, and the washer is formed at the end. The obtained material is supplied to a punching die set composed of a die and a punch, and a step of manufacturing a washer by punching and separating a washer portion from an end of the material by the die set is performed a plurality of times. It is characterized in that a plurality of washers are manufactured from individual materials.

[0006] In order to overcome the above-mentioned problems and achieve the intended object, a washer manufacturing apparatus according to the present invention is an apparatus for manufacturing a washer, and uses a material having a length dimension capable of manufacturing a plurality of washers. A plurality of forming dies including a forming die to be held and a punch for moving forward and backward corresponding to the die and applying a blow to the end of the material held by the forming die to form a washer having a required diameter. A die set, a punching die for holding a material having a washer portion formed at the end, and a reciprocating movement corresponding to the die, and a washer portion of the material held by the punching die are removed from the material. A plurality of punching die sets each including a punching punch to be punched and separated, wherein the forming die set and the punching die set are alternately arranged in the material transfer direction, and the adjacent die is set by a transfer means. Transfer material between dies It is characterized in that the cormorants configuration.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a method and an apparatus for manufacturing a washer according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments.

FIG. 1 is a schematic structural view showing the entirety of an embodiment of an apparatus for suitably implementing a method of manufacturing a washer according to the present invention, and FIG. 2 is a cross-sectional plan view showing a forming portion. is there. That is, in FIG.
1, a cutter device 13 for the wire 12 is arranged, and a supply source 57 for the wire 12 is arranged on the right side of the cutter device 13. The supply source 57 stores the wire 12 wound in a coil shape, and the wire 12 pulled out by a feeding device (not shown) is fed to the cutter device 13. The wire 12 sent from the supply source 57 to the cutter device 13 is cut into a required length by the cutter device 13. In FIG.
Reference numeral 8 denotes a straightening machine for straightening the wire 12 drawn from the supply source 57.

Material 1 cut by the cutter device 13
4 is transferred to a forming section by a transfer 47 to be described later, where a required number of washers 15 are manufactured from one material 14. In addition, the cutter device 13
The length dimension of the raw material 14 to be cut is set according to the number of washers 15 to be manufactured in the forming section.

The fixed frame 16 in the forming section
A die block 17 is provided on the front end surface of the die, and the die block 17 has three molding dies 18, as shown in FIG.
19, 20 and 3 punching dies 21, 22, 23
Are provided in a horizontal row at a constant interval. The forming dies 18, 19, 20 and the punching dies 2
1, 22, and 23 are alternately arranged in the transfer direction of the material 14. That is, in the embodiment, the first forming die 18, the first punching die 21, the second forming die 19, the second punching die 22, the third forming die The die 20 and the third punching die 23 are arranged in this order.

Also, on the front side of the die block 17,
A ram 24 configured to move forward and backward with respect to the block 17 by a driving mechanism (not shown) is provided. Each die 1 is placed on the surface of the ram 24 facing the die block 17.
Six punches 25, 28, 26, 29, 27, 30 corresponding to 8, 21, 19, 22, 20, 23 are provided. The six punches include forming punches 25, 26, 27 corresponding to the forming dies 18, 19, 20 and punching dies 21, 22,
The punches 28, 29, and 30 correspond to the punch 23.
That is, in the embodiment, the first forming punch 25, the first punching punch 28, the second forming punch 26, the second punching punch 29, the third forming punch 29, Punch 27, third punch 3
They are arranged in the order of 0. The first forming die 18 and the first forming punch 25 form a pair to form a first forming die set 31. The first forming die 21 and the first forming punch 28 form a pair. A first punching die set 32 is formed, and a second forming die 19 and a second forming punch 26 are paired to form a second forming die set 33, and a paired second punching die is formed. 22 and second punch 29 for punching
Constitutes the second punching mold set 34, and forms the third
A third forming die set 35 is formed by the forming die 20 and the third forming punch 27, and a third forming die set is formed by a pair of the third punching die 23 and the third punching punch 30. 36 are configured. Since the configuration of each molding die set and each punching die set is the same, only the configuration of the first molding die set 31 and the first punching die set 32 will be described. The same reference numerals are given to the same members of the die set and the punching die set.

The first part of the first molding die set 31
As shown in FIG. 4, the forming die 18 has a through hole 37 that allows the material 14 to be inserted, and a recess 38 having a larger diameter than the through hole 37 is formed in the front end surface thereof. In addition, an annular mold member 39 having an inner diameter corresponding to the outer diameter of the washer 15 to be manufactured is fitted into the recess 38. The die block 17 includes a first molding die 18.
A through hole 40 communicating with the through hole 37 is formed.
, A knockout pin 41 is slidably disposed. The rear end of the material 14 inserted into the through-hole 37 of the first molding die 18 is brought into contact with the knockout pin 41 so that the leading end of the material 14 has one washer 15 forward from the open end of the through-hole 37. It is configured to be moved forward and backward by a driving means (not shown) between a retracted position protruding by a length corresponding to molding and a forward position extruded from the through hole 37 of the material 14.

The first part of the first molding die set 31
As shown in FIG. 4, the molding punch 25 is
The forging part 42 is set to have an outer diameter slightly smaller than the inner diameter of the first forming die 18 and the first forming punch 25 is inserted into the through hole 37 of the first forming die 18. By approaching (advancing) toward
The tip of the material 14 protruding from the open end of the workpiece 7 is hit to form a washer 14a having a required diameter (see FIG. 5B). In addition, at the tip of the forged portion 42, a protrusion 42 is formed at a position corresponding to the through hole 15 a formed in the washer 15.
a is formed, and simultaneously with the formation of the washer portion 14a, a concave portion 14b is formed on the front end surface thereof.

As shown in FIG. 4, the first punching die 21 constituting the first punching die set 32 has the material 1
4 is formed, and the washer 14a formed by forging with the first molding die set 31 is formed.
Is configured to abut and support the front end surface thereof. The die block 17 has a through hole 44 communicating with the through hole 43 of the first punching die 21, and a knockout pin 45 is slidably disposed in the through hole 44. The knockout pin 45 is provided in the through hole 4 of the first punching die 21.
The drive unit (not shown) moves forward and backward between a retracted position that does not interfere with the material 14 inserted into the material 3 and a forward position in which the material 14 is pushed out from the through hole 43.

As shown in FIG. 4, the first punch 28 of the first die set 32 includes a punch 46 which can be inserted into the through hole 43 of the first die 21. The material 14 having the washer portion 14a formed therein is inserted into the through hole 43 of the first punching die 21 and the washer portion 1 is formed.
The first punch 28 is made to approach (advance) the first punching die 21 in a state where the front punch 4a is in contact with the front end face, so that the recess 14b formed at the front center of the front surface of the washer 14a. The washer 15 is manufactured by punching out a portion corresponding to the above and separating it from the material 14 (see FIG. 5C).

In the embodiment, the die block 17 corresponding to the through hole 43 of the third punching die 23 in the third punching die set 36 for performing the final punching step is communicated with the through hole 34. A discharge hole 59 is formed. That is, the material (scrap) 56 punched by the third punch 30 of the third die set 36 is discharged to the outside through the through hole 43 and the discharge hole 59.

On the front surface of the die block 17, the ram 24 is separated (retracted) from the die block 17,
A transfer 47 is provided as transfer means for transferring the material 14 between adjacent mold sets. The transfer 47 is provided with a horizontally swingable mounting member 48 extending along the die block 17, and the mounting member 48 is moved left and right by a swinging mechanism 49 shown in FIG. It is configured to be horizontally swung between.
The mounting member 48 has six dies 18, 21, 19, 22,
In correspondence with 20, 23, the first to sixth chucks 50, 51, 52,
53, 54, 55 are provided. And the mounting member 4
The first chuck 5 is swung in the left-right direction to rotate the first chuck 5.
0 moves between the cutter device 13 and the first forming die 18, the second chuck 51 moves between the first forming die 18 and the first punching die 21, and the third chuck 5 moves.
2 moves between the first punching die 21 and the second molding die 19, and the fourth chuck 53 moves the second molding die 1.
9 and the second punching die 22, the fifth chuck 54 moves between the second punching die 22 and the third molding die 20, and the sixth chuck 55 moves between the third punching die 22 and the third punching die 22. It is configured to move between 20 and the third punching die 23.

The first chuck 50 and the third chuck 5
Second, the fifth chuck 54 is normally urged in the closing direction by an elastic member (not shown), and faces the front surface of the cutter device 13 and the corresponding punching dies 21, 22. The material 14 without the washer portion 14a extruded from the punching dies 21 and 22 is forcibly inserted to grip the material 14. The second chuck 51, the fourth chuck 53, and the sixth chuck 55 are configured to be opened and closed in a timely manner by an opening and closing mechanism (not shown), and the corresponding molding dies 18, 19, 2
The material 14 having the washer 14a formed at the tip extruded from the point 0 can be gripped.

[0019]

Next, the operation of the homer constructed as described above will be described. In the homer 10, the ram 2
4 is separated from the die block 17, the mounting member 48 of the transfer 47 faces the retracted position, and the first chuck 50 is located on the front surface of the cutter device 13. The knockout pins 41, 45, 41, 45, 41, 45 of the respective mold sets 31, 32, 33, 34, 35, 36 face the retreat positions, respectively.

The wire 12 supplied to the cutter device 13 by the feeder is cut into a predetermined length by the cutter device 13. In the embodiment, the rod-shaped material 14 shown in FIG. 5A is obtained by cutting the wire rod 12 to a size that can manufacture three washers 15. The obtained raw material 14 is extruded forward from the cutter device 13 as the wire rod 12 is further supplied by the feeding device,
It is gripped by the first chuck 50 facing the front surface. When the first chuck 50 grips the material 14 in this manner, the swing mechanism 49 operates to move the mounting member 48 from the retracted position to the advanced position, so that the first chuck 50 is moved to the first forming die 18. Will be moved to the front.

At the timing when the mounting member 48 reaches the forward position, the ram 24 moves toward the die block 17 and the first forming punch 25 moves to the first chuck 50.
Is pressed into the through hole 37 of the first molding die 18. The rear end of the material 14 abuts on the tip of a knockout pin 41 provided on the die block 17 to restrict the movement thereof. A blow is applied by 42. At this time, one end of the washer 1 is moved forward from the open end of the through hole 37 in the first molding die 18.
5 protrudes by the length to be molded, a disk-shaped washer 14a is forged and formed at the end while being regulated by the mold member 39 (see FIG. 5B). In the center of the front surface of the washer portion 14a, a convex portion 42 formed on the forged portion 42 is provided.
A concave portion 14b corresponding to a is formed.

Next, after the ram 24 separates from the die block 17, the mounting member 48 moves from the advanced position to the retracted position, so that the first chuck 50 faces the front surface of the cutter device 13 and at the front end. The second chuck 51 faces the front surface of the first forming die 18 holding the material 14 on which the washer 14a is formed. In this state, as the knockout pin 41 moves from the retracted position to the advanced position, the material 14 having the washer 14a formed at the tip is extruded from the first molding die 18. At this time, the second chuck 51 is opened and closed by an opening and closing mechanism, and
The material 14 extruded from the molding die 18 is
It grips without interfering with 4a. The first chuck 5
At 0, the next material 14 extruded from the cutter device 13 by the wire 12 is gripped.

In this state, when the mounting member 48 moves from the retracted position to the advanced position again, the second chuck 51 is moved.
The raw material 14 gripped by the first punching die 21
Transported to the front of When the ram 24 moves toward the die block 17, the first punching punch 28 holds the material 14 held by the second chuck 51.
Into the through hole 43 of the first punching die 21. The washer 14a formed at the front end of the blank 14 abuts on the front end surface of the first punching die 21 and is restricted from moving, so that the punching portion 46 of the first punching punch 28 forms the washer 14a. The center part is punched out, as shown in FIG.
The first washer 15 is manufactured. Since the concave portion 14b is formed in advance at the center of the front surface of the washer portion 14a by the convex portion 42a of the first forming punch 25, the punching of the central portion is performed smoothly. In addition, since a portion punched from the through hole 15a of the obtained washer 15 remains on the material 14 side,
No scrap is generated. In addition, since the washer is formed by the die and the punch and the washer is punched out, the washer 15 with high accuracy without warpage or burrs can be manufactured.

The first punching die set 32 uses the material 14
When the washer portion 14a is punched from the, the washer portion 14a is forged at the tip of the material 14 newly transferred by the first chuck 50 by the first mold set 31.

Next, by moving the mounting member 48 from the retracted position to the advanced position, the third chuck 52 moves the blank 14 from the first punching die set 32 to the second molding die set 33.
Is transferred, and the washer portion 14a is forged at the tip by the mold set 33 (see FIG. 5D). Then, the next mounting member 48
Is moved from the retracted position to the advanced position, the material 14 having the washer 14a formed at the tip is moved to the fourth chuck 53.
Is transferred from the second molding die set 33 to the second punching die set 34, and the washer portion 14a is punched and separated from the material 14 by the die set 34, whereby the second washer 15 is manufactured. (See FIG. 5E). Also in this case, the portion punched from the through hole 15a of the obtained washer 15 remains on the material 14 side.
No scrap is generated.

Further, by moving the mounting member 48 from the retracted position to the advanced position, the fifth chuck 54 moves the blank 14 from the second punching die set 34 to the third molding die set 35.
Is transferred, and the washer portion 14a is forged at the tip of the mold set 35 (see FIG. 5F). As the next mounting member 48 moves from the retracted position to the advanced position, the raw material 14 having the washer 14a formed at the tip is moved from the third molding die set 35 to the third punching die by the sixth chuck 55. The third washer 15 is manufactured by being transferred to the set 36 and punching and separating the washer portion 14a from the material 14 by the mold set 36 (see FIG. 5 (g)). And the through hole 15a of the third washer 15
Only the stamped material 56 at the portion corresponding to is scrap finally discarded. In addition, this material 56
It is discharged outside through the through hole 43 and the discharge hole 59.

That is, the washer 14 a
And the step of punching the washer portion 14a from the center of the material 14 is repeated a required number of times to form one material 1
From 4, a plurality of washers 15 can be manufactured. In addition, the amount of scrap finally discarded is only a small amount of the material 56 punched from the washer 15 to be manufactured finally, so that the raw material can be used very effectively and the material cost can be kept low. be able to.

In the embodiment, the case where three washers are manufactured from one material has been described. However, the present invention is not limited to this, and the manufacturing is made up of a molding die set and a punching die set. By arranging an arbitrary number of units in a row in the material transfer direction, two or four or more washers can be manufactured from one material. Regardless of the number of washers manufactured from one material, the scrap finally discarded is only a small amount of material corresponding to the through hole of the washer manufactured last. It can be extremely reduced. Further, in the embodiment, the configuration in which the rod material is drawn out from the coil body in which the wire material is wound into the coil shape and supplied to the cutter device of the homer is described, but the rod material having a required length dimension is supplied to the cutter device. Can also be adopted. Further, in the embodiment, the case where a plurality of washers are manufactured from one material by a homer has been described. However, a plurality of washers can be manufactured from one material by a press.

[0029]

As described above, according to the method and apparatus for manufacturing a washer according to the present invention, the steps of forming the washer at the end of the material and punching the washer from the material are repeated. Since a plurality of washers are manufactured from one material, the amount of scrap finally discarded can be extremely reduced. Therefore, material costs can be kept low. In addition, since the washer is manufactured by using a mold set including a die and a punch, there is an advantage that the processing accuracy of the obtained washer can be improved and a good product having no surface irregularities or burrs can be manufactured.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing the whole of a homer according to an embodiment of an apparatus for suitably executing a method of manufacturing a washer according to the present invention.

FIG. 2 is a cross-sectional plan view showing a schematic configuration of a forming section of the homer according to the embodiment.

FIG. 3 is a front view showing a schematic configuration of a transfer provided on a front side of a die block of the homer according to the embodiment.

FIG. 4 is a cross-sectional plan view showing a molding die set and a punching die set of a homer according to an example.

FIG. 5 is a manufacturing process diagram of a washer manufactured by the homer according to the embodiment.

[Explanation of symbols]

Reference Signs List 14 material 14a washer part 15 washer 18 first forming die 19 second forming die 20 third forming die 21 first punching die 22 second punching die 23 third punching die 25 first forming punch 26 Second forming punch 27 Third forming punch 28 First punching punch 29 Second punching punch 30 Third punching punch 31 First forming die set 32 First punching die set 33 Second forming punch Die set 34 Second punching die set 35 Third molding die set 36 Third punching die set 47 Transfer (transfer means)

Claims (2)

[Claims] 1. A method for manufacturing a washer (15), comprising the steps of: forming a material (14) having a length dimension capable of manufacturing a plurality of washers (15) with a die (18, 19, 20) and a punch (25, 26); , 27), and supplied to the molding die set (31, 33, 35).
A washer (14a) having a required diameter is forged at the end of (14), and the material (14) having the washer (14a) formed at the end is formed with a die (21, 22, 23) and a punch ( 28, 29, 30) to the punching die set (32, 34, 36), and from the end of the material (14) by the die set (32, 34, 36) to the washer part (14a). A plurality of washers (15) from a single material (14) by performing a step of manufacturing a washer (15) by punching and separating the plurality of washers (15). . 2. An apparatus for manufacturing a washer (15), comprising: a forming die (18, 19, 20) for holding a material (14) having a length dimension capable of manufacturing a plurality of washers (15); Dice (18,19,20)
A forming punch that moves forward and backward in response to the pressure and strikes the end of the material (14) held by the forming dies (18, 19, 20) to form the washer (14a) with the required diameter. (25, 26, 27), a plurality of forming die sets (31, 33, 35), and a punching die (21) for holding a material (14) formed with a washer (14a) at the end. , 22, 23) and the dice (21, 22, 23)
A punch (28, 29) for punching and separating the washer (14a) of the material (14) held by the punching dies (21, 22, 23) from the material (14). , 30) comprising a plurality of punching die sets (32, 34, 36), wherein the forming die set (31, 33, 35) and the punching die set (32, 34, 3
And (6) are alternately arranged in the transfer direction of the material (14), and the material (14) is transferred between the adjacent mold sets by the transfer means (47). apparatus.