JP5621548B2 - Press working apparatus and workpiece manufacturing method using the press working apparatus - Google Patents

Description

  The present invention relates to a press working apparatus and a workpiece manufacturing method using the press working apparatus.

  As a conventional technique, in the press working of a workpiece, there is a method of performing V-shaped cutting for positioning on both sides of the workpiece at the press position and crushing at the same time and performing biaxial positioning in the subsequent press working process. Yes (see, for example, Patent Document 1).

  Moreover, in the press processing apparatus which crushes and processes a workpiece | work, after crushing a workpiece | work, there exists the method of pressing and positioning so that the site | part to be cut may be clamped from both back and front surfaces (for example, refer patent document 2). .

JP 2009-125780 A JP 2004-1014 A

  However, in the positioning method of Patent Document 1, since the cutting process and the crushing process are performed simultaneously, it is necessary to provide a cutting hole in the conventional crushing mold, and there is a concern about a decrease in mold strength. Further, when performing the cutting process and the crushing process at the same time, it becomes impossible to uniformly press the plate, and there is a problem that the positioning accuracy of the work is lowered.

  Further, the positioning method disclosed in Patent Document 2 has a problem that the positioning accuracy of the workpiece is lowered because the positioning of the cutting process is performed based on the shape of the workpiece. Further, in order to adjust the bending of the workpiece, it is necessary to stop the press working apparatus and replace the shim, and there is a problem that the bending of the workpiece cannot be adjusted quickly.

  The present invention has been made in view of the above-mentioned problems, and prevents a reduction in mold strength, improves the positioning accuracy of the workpiece, and does not require a press working device to be stopped in order to adjust the bending of the workpiece. It aims at providing the manufacturing method of the workpiece | work using a processing apparatus and a press processing apparatus.

  A first problem-solving means of the present invention includes a first punch that presses a workpiece, and a first die that cuts and cuts the workpiece together with at least one reference portion together with the first punch. 1 press, a second punch for pressing the workpiece, a second die for crushing the workpiece cut together with the second punch, and a backup block with which the reference portion abuts. A second press, wherein a gap is formed between at least one of the second punch and the backup block and between the second die and the backup block. To do.

  Further, the second problem solving means of the present invention is characterized in that a protruding amount of the reference portion in the backup block direction is larger than the gap.

  The third problem-solving means of the present invention comprises: a first punch that presses a workpiece; and a first die that is cut by providing at least one reference portion on the workpiece together with the first punch. A first press comprising: a second punch for pressing the workpiece; a second die for crushing the workpiece cut together with the second punch; and a backup block with which the reference portion abuts; A press with which a gap is formed between at least one of the second punch and the backup block and between the second die and the backup block. A method for manufacturing a workpiece using an apparatus, wherein a first step of cutting the workpiece by providing the reference portion on the workpiece with the first press and a second press Characterized by comprising a second step of the process crushing the workpiece with respect to the serial reference portion.

  According to the present invention, the work is crushed by the second press by forming a gap between at least one of the second punch and the backup block and between the second die and the backup block. In this case, a part of the work can be inserted into the gap.

  In this case, since the stress acting on the second punch, the second die, and the backup block (die) constituting the second press is reduced, the strength of the second punch, the second die, and the backup block is reduced. Can be prevented. In addition, since a part of the workpiece enters the gap, the stress remaining on the workpiece is reduced. Therefore, when the workpiece is taken out from the mold, the deformation of the workpiece due to the residual stress (of the workpiece regulated by the mold) The difference in the dimension of the formed workpiece with respect to the dimension) can be reduced. Further, in the second press, since the reference portion provided on the work is brought into contact with the backup block and used as a reference for crushing processing, the work positioning accuracy can be improved. Therefore, it is not necessary to stop the press working apparatus in order to adjust the bending of the workpiece.

  Further, according to the second problem solving means of the present invention, the reference portion provided on the workpiece is used as the backup block by making the protrusion amount of the reference portion in the backup block direction (height of the reference portion) larger than the gap. When contacting and using as a reference for crushing processing, the fluidity that a part of the workpiece enters the gap can be improved, and the deformation of the reference portion in the backup block direction can be suppressed.

  Further, according to the third problem solving means of the present invention, in the first step, the reference portion is provided on the workpiece by the first press and cut, and in the second step, the workpiece is determined based on the reference portion by the second press. By crushing, a part of the workpiece can enter the gap in the second step.

  In this case, since the stress acting on the second punch, the second die, and the backup block (die) constituting the second press is reduced, the strength of the second punch, the second die, and the backup block is reduced. Can be prevented. In addition, since a part of the workpiece enters the gap, the stress remaining on the workpiece is reduced. Therefore, when the workpiece is taken out from the mold, the deformation of the workpiece due to the residual stress (of the workpiece regulated by the mold) The difference in the dimension of the formed workpiece with respect to the dimension) can be reduced. Further, in the second step, the reference portion provided on the workpiece is brought into contact with the backup block and used as a reference for crushing processing, so that the workpiece positioning accuracy can be improved. Therefore, it is not necessary to stop the press working apparatus in order to adjust the bending of the workpiece.

It is a side view of the 1st press concerning the embodiment of the present invention. It is the elements on larger scale of the workpiece | work after crushing by the 2nd press which concerns on embodiment of this invention. It is an enlarged view of the side part of the 2nd press concerning the embodiment of the present invention. It is a top view of the workpiece | work after cutting with the 1st press which concerns on embodiment of this invention. It is an enlarged view of the workpiece | work after crushing with the 2nd press which concerns on embodiment of this invention. It is a workpiece enlarged view after carrying out the cutting process with the 3rd press concerning the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The workpiece width direction of the progressive press is the X direction, the press progressive direction is the Y direction, and the punch pressing direction is the Z direction.

  FIG. 1 is a side view of a press 5 (first press) according to an embodiment of the present invention. The press 5 includes a punch 2 (first punch) that presses the workpiece 1 in the Z direction, and a die 3 (first die) that is provided with the reference portions 10 and 11 on the workpiece 1 together with the punch 2 and cut and processed. Is provided.

  The punch 2 includes a plate pressing portion 201 for pressing the plate-shaped workpiece 1 before being cut to the die 3, and a workpiece along the thickness direction of the workpiece 1 sandwiched between the plate pressing 201 and the die 3. 1 and a punch portion 202 that cuts out a part of 1. The punch portion 202 is provided so as to be able to appear and retract with respect to a surface where the plate presser 201 and the work 1 abut. The front end surface of the punch unit 202 is a surface for cutting a part of the work 1.

  The die 3 has a hole 301 into which the tip of the punch unit 202 is inserted after the punch unit 202 penetrates the workpiece 1.

  Further, the workpiece 1 cut by the first press shown in FIG. 1 has, as shown in FIG. 4, two reference portions 10 and 11 protruding in the direction opposite to the Y direction (backup block direction), Have In the reference portions 10 and 11 of the present embodiment, it protrudes from an end surface (side surface) that forms the outer shape of the workpiece 1. The protruding height (projecting amount) of the reference portions 10 and 11 is equal to the thickness of the workpiece 1.

  FIG. 2 is a partially enlarged view of the work 1 after being crushed by a press 25 (second press) according to the embodiment of the present invention. The workpiece 1 is formed with a workpiece protrusion 7 that protrudes opposite to the Y direction between the reference portions 10 and 11. The press 25 has a gap 51 between the work 1 and the backup block 24 in which the reference portions 10 and 11 are in contact with each other for positioning. The protrusion amount (the height of the reference portion) in the direction opposite to the Y direction with respect to the reference portions 10 and 11 is larger than the gap 51.

  FIG. 3 is an enlarged view of a side surface portion of the press 25 according to the embodiment of the present invention. The press 25 includes a punch 22 (second punch) that presses the workpiece 1 cut by the press 5 in the Z direction, a die 23 (second die) that crushes the workpiece 1 together with the punch 22, and a reference portion. And a backup block 24 with which 10 and 11 abut. A gap 51 is formed between the die 23 and the backup block 24. The workpiece 1 is crushed by the press 25 to reduce the thickness, and becomes a forged press-formed product. When the work 1 is crushed, a part of the work 1 protrudes to form the work protrusion 7 and also protrudes in the Z direction and flows into the gap 51.

  Thus, the crushing process by the press 25 crushes the workpiece 1 in the thickness direction in a state where the reference portions 10 and 11 of the workpiece 1 are in contact with the backup block 24. At that time, the workpiece 1 crushed in the thickness direction is deformed so as to spread in the surface direction, that is, the direction perpendicular to the crushed direction, and the outer shape of the workpiece 1 is spread. However, in the present embodiment, a gap 51 is provided between the die 23 and the backup block 24. For this reason, when the workpiece 1 is crushed, the workpiece 1 is deformed so that a part of the workpiece 1 flows into the gap 51, so that the deformation of the workpiece 1 spreading in the surface direction can be suppressed. Further, when the crushing process is performed, the entire reference portions 10 and 11 are not crushed by the punch 22 and the die 23. Therefore, the deformation of the workpiece outer dimensions in the vicinity of the reference portions 10 and 11 (with respect to the workpiece outer shape before the crushing processing) Deformation that spreads outward). Therefore, by positioning the workpiece 1 with reference to the reference portions 10 and 11 in the post-crushing process by the press 25, the positioning accuracy of the work 1 in the post-process can be improved.

  FIG. 4 is a plan view of the workpiece 1 after being cut by the press 5 according to the embodiment of the present invention. The workpiece 1 has a sword tip 12 that extends in the X direction, bends in the Y direction, and protrudes opposite to the X direction, and has a substantially L-shape. Moreover, the workpiece | work 1 has the two reference | standard parts 10 and 11 which protrude in the direction opposite to a Y direction in the part extended in a X direction. Moreover, the workpiece | work 1 has the liner 8 for feeding the workpiece | work 1 in order contrary to a X direction. Note that reference numeral 100 in FIG. 4 denotes a portion cut out by cutting with the press 5.

  FIG. 5 is an enlarged view of the work 1 after being crushed by the press 25 according to the embodiment of the present invention. The workpiece protrusion 7 protrudes opposite to the Y direction while avoiding the reference portions 10 and 11. On the other hand, since the entire workpiece is crushed around the sword tip 12, the workpiece shape spreads outward in relation to the workpiece outline before machining. Therefore, a workpiece protrusion 70 is formed around the sword tip 12 so as to spread outward with respect to the workpiece outer shape before processing. A desired dimension A in the Y direction from the position where the backup block 24 and the reference portion 11 are in contact to the tip of the sword 12 is obtained.

  FIG. 6 is an enlarged view of the workpiece 1 after crushing with the press 25 and then cutting the workpiece projection 70 and the workpiece projection 7 and the reference portions 10 and 11 with a press (not shown). The workpiece 1 is cut off from the liner 8 after the workpiece protrusion 7 and the reference portions 10 and 11 are cut off.

  The operation of the manufacturing method of this embodiment will be described. First, a workpiece 1 (for example, a plate-shaped steel plate having a thickness of 1.5 to 3 mm and a Vickers hardness of 90 to 150) stretched by an uncoiler, a leveler, and a roll feeder (not shown) is one pitch each time the press rotates once. Then, the sheet is sequentially sent to the press 5 for molding.

  As shown in FIG. 4, the workpiece 1 has a substantially L-shaped sword tip 12 that protrudes opposite to the X direction, and reference portions 10 and 11 that protrude opposite to the Y direction. And is cut into a state connected to the liner 8 (first step).

  Next, the workpiece 1 is sent to the press 25, and is positioned by the punch 22 and the die 23 in a state where the reference portions 10 and 11 are in contact with the backup block 24, and strongly presses the entire workpiece 1 in the Z direction. Crushing is performed (second step).

  The thickness of the sword tip 12 is reduced to a thickness within a range of 1 / 1.5 to 1/6 compared with that before crushing. Further, the sword tip 12 is thinned so that the processing hardness and the structure are densified, and the hardness increases by about 1.3 to 3 times depending on the material of the workpiece 1.

  The workpiece 1 is crushed and thinned, so that the workpiece projection 7 that is spread between the reference portions 10 and 11 is projected opposite to the Y direction and flows into the gap 51. Similarly, the workpiece protrusion 70 is protruded around the sword tip 12. The workpiece projecting portion 7 and the workpiece projecting portion 70 project in the X direction and the Y direction, and also project in the Z direction and flow into the gap 51.

  The workpiece 1 is formed by positioning the cutting portion with reference to the reference portions 10 and 11, cutting the workpiece protrusion 70 around the sword tip 12 with a third press (not shown), and performing this processing. Let the end surface of the workpiece 1 be a second reference portion. Further, the workpiece 1 is positioned by the fourth press (not shown) with respect to the second reference portion as a reference, and the workpiece protrusion 7 of the workpiece 1, the reference portions 10 and 11, the liner 8, Is cut and processed.

  The effect of this embodiment will be described. By forming the gap 51 between the punch 23 and the backup block 24, when the workpiece 1 is crushed by the press 25, the workpiece protrusion 7 enters the gap 51, and the punch 22 and the die 23 that constitute the press 25. Since the stress acting on the backup block 24 (die) is reduced, the strength of the punch 22, the die 23, and the backup block 24 can be prevented from lowering. Also, since a part of the work 1 enters the gap, the stress remaining in the work 1 is reduced, so that when the work is taken out from the mold, the deformation of the work due to the residual stress (regulated by the mold) The difference in the dimension of the formed workpiece with respect to the workpiece dimension can be reduced. Further, in the press 25, since the reference portions 10 and 11 provided on the workpiece 1 are brought into contact with the backup block 24 and used as a reference for the crushing process, the positioning accuracy (dimension A) of the workpiece 1 is improved, and the bending of the workpiece 1 is performed. It is not necessary to stop the press working device in order to adjust the above.

  Further, by making the amount of protrusion of the reference portions 10 and 11 opposite to the Y direction larger than the gap 51, the reference portions 10 and 11 provided on the workpiece 1 are brought into contact with the backup block 24 and the crushing processing reference is made. In doing so, it is possible to improve the fluidity of the work projecting portion 7 entering the gap 51, and to suppress the deformation of the reference portions 10 and 11 in the direction of the backup block 24.

  Furthermore, the following technical idea can be grasped from the above description.

(Additional Item 1) In a press working apparatus for forming a workpiece having a desired outer shape from a plate-shaped steel plate, a movable mold (first punch) for pressing the plate-shaped steel plate, and the plate-shaped steel plate together with the movable mold A first press that has a fixed die (first die) that sandwiches the workpiece, moves the movable die in the direction of the fixed die, and cuts out a first workpiece having at least one reference portion. When,
A positioning member (backup block) having an alignment surface with which the reference portion abuts, and a second movable mold (first block) that presses the first workpiece while the reference portion is in contact with the alignment surface. 2), and a second fixed mold (second die) for sandwiching the steel plate together with the second movable mold, and the second movable mold is a second fixed mold. A second press that moves in a direction and crushes or cuts the first workpiece to form a second workpiece,
A press working apparatus, wherein a gap is provided between at least one of the second movable mold and the block and between the second fixed mold and the block.

  In this case, when the second press is performed, the processing position of the first work is determined by providing a reference portion for positioning when performing the second press in a part of the first work. It can be determined with high accuracy. In particular, when the first work is formed from a plate-shaped steel plate by a first press so that a part of the first work is partly connected to the edge of the plate-shaped steel plate, that is, the periphery of the first work is In the case of being almost cut out (punched), even if the edge of the plate steel plate is fixed, the position of the first work is hardly fixed because it is only partially connected to the edge of the plate steel plate. However, according to the invention of the present application, when the first workpiece is processed in the second press, the processing position can be fixed (set) with high accuracy. Therefore, it is not necessary to stop the press working apparatus in order to adjust the bending of the workpiece. That is, in the press working apparatus in which a plurality of press workings are continuously performed, the process for positioning can be eliminated or shortened.

(Additional Item 2) In Additional Item 1, the reference portion may be a protrusion protruding in a direction perpendicular to a thickness direction from an end surface (side surface to the surface to be pressed) of the first workpiece.

  In this case, when the second press is performed, a gap corresponding to the height of the protrusion is formed between the positioning surface and the end surface of the first workpiece. Therefore, when a part of the first work enters the gap, the stress remaining on the work is reduced, so that when the second work is taken out from the mold, the deformation of the work due to the residual stress (mold) The difference between the dimension of the second workpiece formed with respect to the dimension of the workpiece regulated in (1) can be reduced. Therefore, when processing the second workpiece, the positioning accuracy of the second workpiece can be improved.

(Additional Item 3) In Additional Item 2, in the first workpiece, the first workpiece has one portion (end portion) having a connecting portion (liner) to the edge of the plate-shaped steel plate, and the plate-like shape. Having the other part (end part) which does not have a connection part with the edge of a steel plate,
The protrusion may be provided on the other side of the intermediate position between the one part and the other part.

  In this case, it is suitable for positioning the first workpiece. Moreover, it is suitable for improving the dimensional accuracy of the second workpiece. Furthermore, it is suitable for increasing the positioning accuracy when processing the second workpiece.

(Additional Item 4) In Additional Item 2, in the first work, the first work has one part (end part) having a connection part (liner) with an edge part of the plate-shaped steel plate, and the plate shape. Having the other part (end part) which does not have a connection part with the edge of a steel plate,
There are two protrusions, the first protrusion is provided on the other side of the intermediate position between the one part and the other part, and the second protrusion is on the one part side of the intermediate position. It should be provided.

  In this case, it is suitable for positioning the first workpiece. Moreover, it is suitable for improving the dimensional accuracy of the second workpiece. Furthermore, it is suitable for increasing the positioning accuracy when processing the second workpiece.

Although the press working apparatus of the present invention has been described based on the above embodiment, the present invention is not limited to the above embodiment, and various modifications, changes and improvements can be made without departing from the spirit of the invention. .

1 Work 2 Punch (first punch)
3 dice (first dice)
5 Press (first press)
7 Work protrusion 8 Liner 10 Reference part 11 Reference part 12 Blade tip 22 Punch (second punch)
23 Dice (second die)
24 Backup block 25 Press (second press)
51 Clearance 70 Work protrusion

Claims (3)

A first press comprising: a first punch that presses the workpiece; and a first die that cuts the workpiece by providing at least one reference portion together with the first punch;
A second press comprising: a second punch that presses the workpiece; a second die that crushes the workpiece cut together with the second punch; and a backup block that contacts the reference portion. Have
A press working apparatus in which a gap is formed between at least one of the second punch and the backup block and between the second die and the backup block.   The press working apparatus according to claim 1, wherein an amount of protrusion of the reference portion in the backup block direction is larger than the gap. A first press comprising: a first punch that presses the workpiece; and a first die that cuts the workpiece by providing at least one reference portion together with the first punch;
A second press comprising: a second punch that presses the workpiece; a second die that crushes the workpiece cut together with the second punch; and a backup block that contacts the reference portion. Have
A method for manufacturing a workpiece using a press working apparatus in which a gap is formed between at least one of the second punch and the backup block and between the second die and the backup block,
A first step in which the reference portion is provided on the workpiece by the first press and is cut;
And a second step of crushing the workpiece with reference to the reference portion in the second press.

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