JP2006116610A - Washer manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washer manufacturing method capable of holding down the material cost by reducing the amount of scraps to be finally disposed. <P>SOLUTION: A washer part 14a is headed on a tip of a stock 14 by a first set of forming dies. The washer part 14a is punched out of the stock 14 transferred from the first set of forming dies to a first set of punching dies to manufacture a first washer 15. Next, a washer part 14a is headed on the tip of the stock 14 transferred from the first set of punching dies to a second set of forming dies. The washer part 14a is punched out of the stock 14 transferred from the second set of forming dies to a second set of punching dies to manufacture a second washer 15. In addition, a washer part 14a is headed on a tip of the stock 14 transferred from the second set of punching dies to a third set of forming dies. The washer part 14a is punched out of the stock 14 transferred from the third set of forming dies to a third set of punching dies to manufacture a third washer 15. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a washer manufacturing method, and more particularly to a washer manufacturing method in which a plurality of washers are manufactured from a single material so that the amount of scrap finally discarded can be reduced. It is.

  In order to evenly distribute the pressure applied to the tightening surface of the bolt, nut or machine screw, a washer interposed between the bolt, nut or machine screw and the fastening surface is generally used. This washer is manufactured by punching out a plate having a required thickness.

  In the conventional washer manufacturing method, since an annular washer is punched from a plate material having a required dimension, all of the plate material cannot be used, and there is a problem that a lot of wasted material (scrap) is generated. Moreover, the material punched to form the through holes of the individual washers also became scrap, and the scrap generated from the raw material was about 50%. That is, the conventional method for producing a washer has a problem that the amount of scrap finally discarded is extremely large and the material cost increases.

  The present invention has been proposed in view of the above-mentioned problems inherent in the above-described method for manufacturing a washer, and has been proposed to suitably solve this problem. The material cost is reduced by reducing the amount of scrap that is finally discarded. It is an object of the present invention to provide a washer manufacturing method capable of suppressing the cost of the machine.

In order to overcome the aforementioned problems and achieve the intended purpose, a method for manufacturing the washer according to the present invention includes:
A method for producing a plurality of washers from a material having a required length,
The material is supplied by a transfer means to a molding die in a molding die set consisting of a molding die and a molding punch,
By moving the molding punch corresponding to the molding die forward and backward, the end of the material held by the molding die is hit, and the washer portion of the required diameter is forged and formed at the center of the front surface. A forging step in which a concave portion is formed by the convex portion of the molding punch;
The material with the washer formed at the end is supplied to the punching die in the punching die assembly composed of the punching die and punching punch by the transfer means, and the punching punch corresponding to the punching die is moved forward and backward. Then, a portion corresponding to the concave portion in the washer portion of the material held by the punching die is punched, and a washer is manufactured by a punching step of separating the washer portion from the material,
A plurality of washers are manufactured from one material by performing the forging step and the punching step a plurality of times.

  As described above, according to the method for manufacturing a washer according to the present invention, by repeating the step of forming the washer portion at the end of the material and the step of punching the washer portion from the material, it is possible to start from one material. Since a plurality of washers are manufactured, the amount of scrap finally discarded can be greatly reduced. Therefore, the material cost can be kept low. In addition, since the washer is manufactured by a die set including a die and a punch, there are advantages that the processing accuracy of the obtained washer can be improved and a good product without surface irregularities and burrs can be manufactured. Further, in the forging step, the concave portion is formed in advance by the convex portion of the molding punch in the center of the front surface of the washer portion, and therefore, in the punching step, the portion corresponding to the concave portion in the washer portion can be smoothly punched.

  Next, a preferred embodiment of the method for manufacturing a washer according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a schematic configuration diagram showing the entire houma according to an embodiment of an apparatus for suitably carrying out the washer manufacturing method according to the present invention, and FIG. 2 is a cross-sectional plan view showing a forming portion. That is, in FIG. 1, the cutter device 13 for the wire 12 is disposed on the bed 11 of the Houma 10, and the supply source 57 for the wire 12 is disposed 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 drawn by a feeding device (not shown) is fed toward the cutter device 13. And the wire 12 sent to the cutter apparatus 13 from the supply source 57 is cut | disconnected by this cutter apparatus 13 to a required length dimension. In FIG. 1, reference numeral 58 denotes a straightening machine that straightens the wire 12 drawn from the supply source 57.

  The material 14 cut by the cutter device 13 is transferred to a forming portion by a transfer 47 described later, and a required number of washers 15 are manufactured from one material 14 here. In addition, the length dimension of the raw material 14 cut | disconnected by the cutter apparatus 13 is set according to the number of the washers 15 manufactured in a shaping | molding process part.

  A die block 17 is disposed on the front end surface of the fixed frame 16 in the molding portion. The die block 17 has three molding dies 18, 19, 20 and three punching dies as shown in FIG. 21, 22, and 23 are provided in a horizontal row at a constant interval. The forming dies 18, 19, 20 and the punching dies 21, 22, 23 are alternately arranged in the transfer direction of the material 14. That is, in the embodiment, the first molding die 18, the first punching die 21, the second punching die 19, the second punching die 22, and the third molding die are arranged in the material transfer direction from the arrangement position of the cutter device 13. The die 20 and the third punching die 23 are arranged in this order.

  A ram 24 configured to move forward and backward with respect to the block 17 by a drive mechanism (not shown) is disposed on the front side of the die block 17. Six punches 25, 28, 26, 29, 27, 30 corresponding to the dies 18, 21, 19, 22, 20, 23 are arranged on the surface of the ram 24 that faces the die block 17. The six punches are forming punches 25, 26, and 27 corresponding to the forming dies 18, 19, and 20, and punching punches 28, 29, and 30 corresponding to the punching dies 21, 22, and 23, respectively. In other words, in the embodiment, the first molding punch 25, the first punching punch 28, the second punching punch 26, the second punching punch 29, and the third molding punch in the material transfer direction from the arrangement position of the cutter device 13. The punch 27 and the third punch 30 are arranged in this order. The first molding die 18 and the first molding punch 25 that form a pair constitute a first molding die set 31, and the pair of the first punching die 21 and the first punching punch 28 form a pair. A first stamping die set 32 is configured, and a second molding die set 33 is configured by the second molding die 19 and the second molding punch 26 that form a pair, and a second punching die that forms a pair. 22 and the second punching punch 29 constitute a second punching die set 34, and the paired third molding die 20 and the third molding punch 27 constitute a third molding die set 35. The third punching die 23 and the third punching punch 30 that form a pair constitute a third punching die set 36. Since the configuration of each molding die set and each punching die set are the same, only the configuration of the first molding die set 31 and the first punching die set 32 will be described, and other moldings will be described. The same reference numerals are assigned to the same members of the mold set for punching and the mold set for punching.

  As shown in FIG. 4, the first molding die 18 constituting the first molding die group 31 is formed with a through-hole 37 that allows the material 14 to be inserted, and the front end surface thereof has a through-hole. A recess 38 having a diameter larger than that of the hole 37 is formed. Further, an annular mold member 39 set to an inner diameter that matches the outer diameter of the washer 15 to be manufactured is fitted into the recess 38. A through hole 40 communicating with the through hole 37 of the first molding die 18 is formed in the die block 17, and a knockout pin 41 is slidably disposed in the through hole 40. The knockout pin 41 has the rear end of the material 14 inserted into the through hole 37 of the first molding die 18 so that the tip of the material 14 holds the washer 15 for one sheet 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 an advanced position for extruding the material 14 from the through hole 37.

  As shown in FIG. 4, the first molding punch 25 constituting the first molding die set 31 includes a forging portion 42 set to an outer diameter slightly smaller than the inner diameter of the mold member 39, and the raw material 14 With the first molding punch 25 approaching (advancing) toward the first molding die 18 in a state where the first molding die 18 is inserted through the through-hole 37 of the first molding die 18, the first molding die 25 protrudes from the open end of the through-hole 37. The tip of the material 14 is hit, and a washer portion 14a having a required diameter is formed by forging (see FIG. 5B). In addition, at the tip of the forged portion 42, a convex portion 42a is formed at a position corresponding to the through hole 15a formed in the washer 15, and at the same time as the washer portion 14a is formed, a concave portion 14b is formed on the front end surface correspondingly. It comes to form.

  As shown in FIG. 4, the first punching die 21 constituting the first punching die set 32 is formed with a through hole 43 that allows the material 14 to be inserted, and the first molding die. The washer portion 14a formed by forging with the set 31 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 a driving means (not shown) between a retracted position where it does not interfere with the material 14 inserted through the through hole 43 of the first punching die 21 and an advanced position where the material 14 is pushed out from the through hole 43. It is designed to move forward and backward.

  As shown in FIG. 4, the first punching punch 28 constituting the first punching die set 32 includes a punching portion 46 that can be inserted into the through-hole 43 of the first punching die 21 and has a washer portion at the tip. The first punching punch 28 is inserted into the first punching die 21 with the material 14 having the 14a formed inserted through the through hole 43 of the first punching die 21 and the washer 14a in contact with the front end surface. The washer 15 is manufactured by punching a portion corresponding to the concave portion 14b formed in the previous stage in the center of the front surface of the washer portion 14a and separating it from the material 14 by approaching (advancing) toward the front ( (Refer FIG.5 (c)).

  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 performing the final punching step in the embodiment has a discharge hole 59 communicating with the through hole 34. Is formed. That is, the material (scrap) 56 punched by the third punch 30 of the third punch die set 36 is discharged to the outside through the through hole 43 and the discharge hole 59.

  A transfer 47 is disposed on the front surface of the die block 17 as a transfer means for transferring the material 14 between adjacent mold sets in a state where the ram 24 is separated (retreated) from the die block 17. . The transfer 47 includes a mounting member 48 extending horizontally along the die block 17 so that the mounting member 48 can swing horizontally. The mounting member 48 is moved by a swinging mechanism 49 shown in FIG. It is comprised so that it may swing horizontally between. The mounting member 48 includes six chucks 50, 51, 1 to 6, which releasably grip the material 14, corresponding to the six dies 18, 21, 19, 22, 20, 23. 52, 53, 54, 55 are arranged. Then, by swinging the mounting member 48 in the left-right direction, the first chuck 50 moves between the cutter device 13 and the first molding die 18, and the second chuck 51 moves between the first molding die 18 and the first molding die 18. The first chuck 21 moves between the first punching die 21, the third chuck 52 moves between the first punching die 21 and the second molding die 19, and the fourth chuck 53 moves between the second punching die 19 and the second molding die 19. 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 20 and the second punching die 22. It is configured to move between the three punching dies 23.

  The first chuck 50, the third chuck 52, and the fifth chuck 54 are always urged in the closing direction by an elastic member (not shown), and the front surfaces of the cutter device 13 and the corresponding punching dies 21 and 22 are applied. In this state, the material 14 without the washer portion 14a pushed out from the cutter device 13 and the punching dies 21 and 22 is forcibly inserted to hold 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 / closing mechanism (not shown), and a washer portion 14a is provided at a tip pushed out from the corresponding forming dies 18, 19, and 20. Can hold the molded material 14.

(Operation of Example)
Next, the operation of the Houma configured as described above will be described. In the Houma 10, the ram 24 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 positioned on the front surface of the cutter device 13. Further, the knockout pins 41, 45, 41, 45, 41, 45 of the respective die sets 31, 32, 33, 34, 35, 36 face the retracted positions, respectively.

  The wire rod 12 supplied to the cutter device 13 by the feeding device is cut into a length dimension set in advance by the cutter device 13. In the embodiment, the rod-shaped material 14 shown in FIG. 5A is obtained by cutting the wire 12 with such a size that the three washers 15 can be manufactured. The obtained material 14 is pushed forward from the cutter device 13 by further supplying the wire 12 by the feeding device, and is gripped by the first chuck 50 facing the front surface thereof. When the first chuck 50 grips the material 14 in this way, the swing mechanism 49 is operated to move the attachment member 48 from the retracted position to the advanced position, whereby the first chuck 50 is moved to the first molding die 18. Moved to the front.

  At the timing when the mounting member 48 reaches the forward movement position, the ram 24 moves close to the die block 17, and the material 14 in which the first molding punch 25 is held by the first chuck 50 is used for the first molding. Push into the through hole 37 of the die 18. The rear end of the material 14 abuts against the tip of the knockout pin 41 disposed on the die block 17 so that the movement is restricted, so that the forging portion of the first forming punch 25 is formed on the tip of the material 14. A hit is applied by 42. At this time, the tip of the material 14 protrudes forward from the open end of the through hole 37 in the first molding die 18 by a length that allows one washer 15 to be molded. The disc-shaped washer portion 14a is formed by forging in a state regulated by 39 (see FIG. 5B). In addition, the recessed part 14b corresponding to the convex part 42a formed in the forge part 42 is formed in the front center of the washer part 14a.

  Next, after the ram 24 is separated from the die block 17, the mounting member 48 moves from the advance position to the retract position, so that the first chuck 50 faces the front surface of the cutter device 13 and the washer portion 14 a at the tip. The second chuck 51 faces the front surface of the first molding die 18 that holds the material 14 that has been molded. In this state, the knockout pin 41 moves from the retracted position to the advanced position, whereby the material 14 having the washer portion 14a formed at the tip is pushed out from the first forming die 18. At this time, the second chuck 51 is opened and closed by an opening and closing mechanism, and grips the material 14 extruded from the first molding die 18 without interfering with the washer portion 14a. In the first chuck 50, the next material 14 extruded from the cutter device 13 by the wire 12 is gripped.

  In this state, when the mounting member 48 is moved again from the retracted position to the advanced position, the material 14 held by the second chuck 51 is transferred to the front surface of the first punching die 21. The ram 24 moves toward the die block 17 so that the first punching punch 28 pushes the material 14 held by the second chuck 51 into the through hole 43 of the first punching die 21. . The washer portion 14a formed at the tip end portion of the material 14 abuts against the front end surface of the first punching die 21 and is restricted in movement, so that the punching portion 46 of the first punching punch 28 causes the washer portion 14a to move. The central portion is punched, and the first washer 15 is manufactured as shown in FIG. In addition, since the recessed part 14b is previously formed by the convex part 42a of the 1st shaping | molding punch 25 in the center of the front surface of the washer part 14a, the punching of the center part is performed smoothly. Further, since the portion punched out from the through hole 15a of the washer 15 remains on the material 14 side, no scrap is generated. Moreover, since the washer part is formed by the die and the punch and the washer part is punched out, it is possible to manufacture the washer 15 with high accuracy without warping or burrs.

  When the washer portion 14 a is punched from the material 14 by the first punching die set 32, the washer is attached to the tip of the material 14 newly transferred by the first chuck 50 by the first molding die set 31. The portion 14a is formed by forging.

  Next, as the mounting member 48 moves from the retracted position to the advanced position, the material 14 is transferred from the first punching die set 32 to the second molding die set 33 by the third chuck 52, and the die A washer portion 14a is formed by forging at the tip of the mold set 33 (see FIG. 5D). Then, by moving the next mounting member 48 from the retracted position to the advanced position, the material 14 having the washer portion 14a formed at the tip thereof is used for the second punching from the second molding die set 33 by the fourth chuck 53. The second washer 15 is manufactured by being transferred to the die set 34 and the washer portion 14a being punched and separated from the material 14 by the die set 34 (see FIG. 5 (e)). Also in this case, since the portion punched from the through hole 15a of the obtained washer 15 remains on the material 14 side, no scrap is generated.

  Further, when the mounting member 48 is moved from the retracted position to the advanced position, the material 14 is transferred from the second punching die set 34 to the third molding die set 35 by the fifth chuck 54, and the die A washer portion 14a is formed by forging at the tip of the group 35 (see FIG. 5 (f)). By moving the next mounting member 48 from the retracted position to the advanced position, the material 14 having the washer portion 14a formed at the tip thereof is transferred from the third forming mold set 35 to the third punching mold 35 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. 5G). Only the punched material 56 corresponding to the through hole 15a of the third washer 15 becomes scrap that is finally discarded. The material 56 is discharged to the outside through the through hole 43 and the discharge hole 59.

  That is, a plurality of washers 15 are manufactured from a single material 14 by repeating a step of forming the washer portion 14 a at the tip of the material 14 and a step of punching the washer portion 14 a from the center of the material 14 a required number of times. be able to. In addition, the amount of scrap that is finally discarded is only a small amount of material 56 punched from the washer 15 that is finally manufactured, and 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 application is not limited to this, and a manufacturing unit including a molding die set and a punching die set is arbitrarily selected. If the number is arranged in a horizontal 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 that is finally discarded is only a small amount of material corresponding to the through hole of the washer that is manufactured last, and the scrap generation rate is reduced. It can be extremely reduced. In the embodiment, the Houma cutter apparatus has been described with the configuration in which the wire is drawn out and supplied from the coil body obtained by winding the wire in a coil shape. However, the rod-shaped material having the required length is supplied to the cutter apparatus. Can also be adopted. Further, in the embodiment, the case where a plurality of washers are manufactured from one material by Houma has been described. However, a plurality of washers can be manufactured from one material by pressing.

It is a schematic block diagram which shows the whole Houma which concerns on one Example of the apparatus which suitably implements the manufacturing method of the washer concerning this invention. It is a cross-sectional top view which shows schematic structure of the shaping | molding process part of the Houma which concerns on an Example. It is a front view which shows schematic structure of the transfer arrange | positioned at the front side of the die block of the Houma which concerns on an Example. It is a cross-sectional top view which shows the metal mold | die group for shaping | molding of the Houma which concerns on an Example, and the metal mold | die group for punching. It is a manufacturing-process figure of the washer manufactured by the houma which concerns on an Example.

Explanation of symbols

14 Material, 14a Washer, 14b Recess 15 Washer, 18 First Molding Die (Molding Die)
19 Second forming die (molding die)
20 Third molding die (molding die)
21 First die for punching (die for punching)
22 Second die for punching (die for punching)
23 Third die for punching (die for punching)
25 Punch for first molding (Punch for molding)
26 Second molding punch (molding punch)
27 Third Molding Punch (Molding Punch)
28 First punch for punching (punching for punching)
29 Punch for second punch (Punch for punch)
30 Punch for third punch (Punch for punch)
31 1st mold set (mold set)
32 First die set for punching (die set for punching)
33 Second mold assembly (mold assembly)
34 2nd die set for punching (die set for punching)
35 Third Mold Set (Mold Mold Set)
36 3rd die set for punching (die set for punching)
42a convex part, 47 transfer (transfer means)

Claims (1)

A method for producing a plurality of washers (15) from a material (14) of a required length dimension,
The material (14) is a molding die (18, 19, 20) and a molding die (18, 19, 20) and a molding die set (31, 33, 35) composed of a molding punch (25, 26, 27). 19, 20) by means of transfer means (47),
By moving the molding punches (25, 26, 27) corresponding to the molding dies (18, 19, 20) forward and backward, the material (14 At the same time, the washer part (14a) of the required diameter is forged and the concave part (14b) is formed by the convex part (42a) of the molding punch (25, 26, 27) at the center of the front surface. Forming process to form;
A material (14) having a washer (14a) formed at its end is formed by a punching die assembly (32, 32) and a punching die (21, 22, 23) and punching punch (28, 29, 30). 34, 36) is fed to the punching dies (21, 22, 23) by the transfer means (47), and the punching punches (28, 29, 30) corresponding to the punching dies (21, 22, 23) are moved forward and backward. It moves and punches a portion corresponding to the recess (14b) in the washer portion (14a) of the material (14) held by the punching die (21, 22, 23), and the washer portion (14a ) To produce a washer (15) with a punching process that separates the material (14)
A washer manufacturing method, wherein a plurality of washers (15) are manufactured from one material (14) by performing the forging step and the punching step a plurality of times.

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