TW583039B - Negative angle forming type rotary cam moving apparatus - Google Patents

Abstract

The present invention provides a rotary cam moving apparatus of a negative angle shaping mold which can avoid an interference of rotary cams, require no canceling process in rotary cam end portions with a high accuracy, and maintain a strength in the rotary cam end portion. There is provided a rotary cam moving apparatus of a negative angle shaping mold comprising: a lower mold which mounts a metal thin plate work on a supporting portion; an upper mold which descends in a linear direction with respect to the lower mold and comes into contact with the work to shape the work; a rotary cam which forms an intrusion shaping portion intruded from a locus of the upper mold in an edge portion close to the supporting portion, and is rotatably provided in the lower mold; a slide cam which has an intrusion shaping portion, and is slidably provided so as to oppose to the rotary cam; and an automatic resetting device which rotates and moves backward the rotary cam to a backward moved state capable of taking out the work from the lower mold after shaping, and is provided in the lower mold, in which the work mounted on the supporting portion of the lower mold is shaped by the intrusion shaping portion of the rotary cam and the intrusion shaping portion of the slide cam by sliding the slide cam, and the shaped work is taken out from the lower mold by rotating and moving backward the rotary cam by means of the automatic resetting device after shaping, and a plurality of rotary cams are continuously arranged in an oblique shape, wherein one rotary cam of the adjacent rotary cams is moved so as to be apart from another rotary cam at a time of being rotated to a backward moved state.

Description

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 583039 A7 B7 V. Description of the Invention (1) [Technical Field of the Invention] The present invention relates to a rotary cam moving device for forming a negative-angle forming mold for forming a thin metal sheet, especially 傺The rotary cam moving device of a negative angle forming die in which a plurality of rotary cams are arranged in an oblique manner. Here, the term "negative-angle forming mold" refers to a recessed molding in which a downward trajectory from a straight direction of the upper die enters the lower die. It enters from the downward trajectory of the upper die in the straight direction, so that the negative angle forming of the sheet metal workpiece recessed into the lower die is generally performed using a sliding cam. In the conventional concave forming of a sheet metal workpiece, the workpiece is placed on the lower die, and the upper die is lowered vertically. The driven cam of the lower die is driven by the action cam of the upper die, and the workpiece is horizontally moved. Processing, when the processing is completed and the upper die is raised, the action cam is retracted by the spring. In this case, although the forming portion of the driven cam that slides laterally from the outside of the workpiece to form the workpiece is designed to have the same shape as the forming portion of the workpiece, the lower mold forming portion that houses the workpiece is being processed. After completion, the workpiece must be taken out from the lower mold, so the concave portion of the lower mold must be divided to make it back, or the rear portion of the concave portion must be cut off first to move the workpiece forward, and the workpiece can be removed. If the degree of recession is small, it will not cause a problem, but when the degree of recession is large or the cross-section of the workpiece is in the shape of a slender frame, such as parts such as outer front pillars made of sheet metal for automobiles, due to the workpiece The groove width is narrow. If the concave lower die part is to be divided or cut off, not only cannot the obvious configuration be formed in the forming part of the driven cam, but the strength of the lower die is also insufficient, so that the concave forming process cannot be performed. In addition, although the product may be warped or deformed, it is necessary to correct the product. -4- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page. )

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583039 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (2), but for example, the outer panel, fender, roof panel, hood, trunk lid, door panel, and front pillar The parts of the outer panel of the car have curved surfaces / curves with a three-dimensional space, and the modification of the product is practically impossible. When the metal sheet of an automobile is assembled, once the product is distorted or distorted, it is difficult to combine it with other parts, and it cannot provide a high-quality automotive metal sheet structure, and it cannot maintain the precision of the predetermined product of the metal sheet molded product. In order to solve the above-mentioned problems, there have been proposals for the following structure: (1) The rotary cam is rotated into a forming posture by an automatic resetting device, and then the upper die enters the forming part in the lower die from a linear downward trajectory to form a workpiece. After forming, the rotary cam is rotated backward by the automatic reset tool until the formed workpiece can be taken out from the lower mold. That is, as shown in FIG. 15 to FIG. 20, the negative-angle forming mold is pseudo-formed by: the sheet metal workpiece W is placed on the lower mold 102 of the support portion 101; The workpiece V is punched and the workpiece W is formed into an upper die 103. The upper die 103 is rotatably provided in the lower die 102, an opening is formed on the outer peripheral surface, and a groove 104 is formed in the axial direction. The groove 104 is close to the support. A rotating cam 106 of the concave forming part 105 which enters from the trajectory of the upper die 103 is formed on the edge portion of the part 101; the upper cam 103 is slidably provided with a concave forming part 107 and faces the rotating cam 106 The slide cam 108 is provided in the lower mold 102, and after forming, the rotary cam 106 can be rotated and retracted to a state where the workpiece W can be taken out of the lower mold 102, and is constituted by an air cylinder 109 for automatic resetting. When the workpiece placed on the supporting part 101 of the lower mold 102 slides on the sliding cam 108, the concave forming part 105 of the rotating cam 106 is used. -5- This paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297). Mm) ------------------ Order --------- (Please read the precautions on the back before filling this page) 583039 A7 B7 Ministry of Economy Wisdom Printed by the Consumer Cooperative of the Property Bureau V. Description of the Invention (3) The recessed forming part 107 of the sliding cam 108 forms the workpiece W. After the forming, the rotary cam 106 is rotated backward by the air cylinder 109, and the formed The workpiece W is taken out by the lower mold 102. The operation of the negative-angle forming mold is described below. First, as shown in Fig. 15, the upper die 103 is positioned at the top dead point, and the workpiece W is loaded on the supporting portion 101 of the lower die 102 at the same time. At this time, the rotary cam 106 is in a backward posture by the air cylinder 109. Next, as shown in FIG. 16, after the rotary cam 106 is formed into a forming posture by the air cylinder 109, the upper mold 103 starts to descend, and the pressure block 110 presses the workpiece W placed on the support portion 101 of the lower mold 102. . Next, as shown in FIG. 17, the upper die 103 is lowered, and the lower surface of the sliding cam 10δ abuts against the rotating plate 111 without disturbing the recessed forming portion 105 of the rotating cam 106. When the upper mold 103 continues to descend, it is directed toward the outer side of the mold. The sliding cam 108 that is pressed against the spring pressure of the coil spring 112 moves laterally to the left by the action of the cam, and becomes the state shown in FIG. The concave forming portion 105 of the rotary cam 106 and the concave forming portion 107 of the slide cam 108 perform concave forming of the workpiece W. As shown in FIG. 19, after the concave molding, the upper die 103 starts to rise. The slide cam 108 is urged out of the mold by the coil spring 112, and moves to the right and rises in FIG. 20 without interfering with the concavely formed workpiece W. On the other hand, the sliding cam 108 rises, and the rotary cam 106 rotates to the right using the air cylinder 109 as shown in Fig. 16, and the lower mold 102 -6- (Please read the precautions on the back before filling (This page)

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This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 583039 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 ____B7_ V. Description of the invention (4) When taking out the workpiece W which has been recessed into shape, The workpiece W can be smoothly taken out without disturbing the concave forming portion 105 of the rotary cam 106. In recent years, however, there has been a great demand for high precision in the sheet metal structure of automobiles, and there is a tendency to integrate a plurality of sheet metal formed products. Therefore, it is impossible to process a negative-angle forming portion of a large-sized workpiece with one rotary cam, and it is necessary to continuously arrange a plurality of rotary cams for forming processing. As described above, the rotary cam 106 is formed into a formed posture by the retracting action of the piston rod 113 of the air cylinder 109, and the retracted posture is formed by the elongation action of the piston rod 113 of the air cylinder 109. When the adjacent rotary cams are arranged in an oblique connection other than the linear configuration, the rotary cams will interfere with the adjacent rotary cams when they rotate. In order to avoid the interference and cut off the interference part, the cutting process must have accuracy, and the intensity of the cut-out part will be reduced. In view of the foregoing, the present invention provides a rotary cam moving device for a negative-angle forming mold. The device can avoid the interference of the rotary cam, and does not need the cutting process that must have the precision of the rotary cam end to maintain the rotary cam end. The negative angle forming mold is composed of: a metal sheet workpiece is placed on the lower mold of the support portion; and the lower mold is linearly lowered from the lower mold to punch the workpiece to form the upper mold. : Rotating cam is set on the lower mold freely, and a rotary cam with a concave forming part that can be accessed by the upper mold trajectory is formed on the edge part close to the support part; it has a concave forming part and faces the aforementioned rotating cam and slides freely The sliding cam is provided in the lower mold. After the forming, the rotating cam can be rotated to retreat until the workpiece can be taken out from the lower mold to form a stack of paper. One paper size applies the Chinese national standard (CNS ) A4 specification (210 X 297 mm) J ----; -------------- Order --------- (Please read the notes on the back before filling in this ), 583039 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 __B7__ V. Description of Invention (5) The successful person makes the workpiece placed on the support part of the lower mold when the sliding cam slides through the recess of the rotating cam The forming part and the concave concave forming part of the sliding convex are formed. After the workpiece is formed, the rotary cam is rotated and retracted by the automatic reset tool, and the formed workpiece can be taken out from the lower mold. Among them, when turning toward the backward posture, one of the adjacent rotary cams is moved so that it is separated from the other rotary cam, and more specifically, the negative angle forming provided by the present invention The rotating cam moving device of the mold is provided with a moving track and a roller for guiding the moving track as a means for moving one rotating cam from the rotating cam of the other. [Examples] The present invention will be described in detail below with reference to specific examples shown in the drawings. Figures 1 to 3 掲 do not rotate the cams 1 and 2 to form the posture. Figures 6 to 8 show the state in which the rotary cam 1 is at a standstill, and the rotary cam 2 is moved backward by 20 °, causing end interference. Figs. 9 to 11 are in a state where the end portions of Figs. 6 to 8 are avoided, and the turning cam 2 is moved to leave the turning cam 1 (about 10 mro). Figures 12 to 14 show the state where the rotary cam 1 is rotated backward by 30 ° and then the rotary cam 1 is rotated backward by 20 °. 1 to 3 show the forming postures of the rotary cams 1 and 2. Figure 2 is the II-II arrow view of Figure 1, and Figure 3 is the III-III arrow view of Figure 1. In Figs. 1, 4, and 5, a moving device is provided. When the rotary cam 2 moves backward, the rotary cam 2 moves in a direction away from the rotary cam 1. -8-(Please read the precautions on the back before filling this page)

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This paper size applies to China National Standard (CNS) A4 (210 X 297 mm). Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 583039 Α7 ________ Β7 V. Description of the invention (6) Symbols 3-3 and 4-4 are The rotation axes of the rotation cams 1 and 2 are denoted by reference numerals 5 and 6 to form the angular ridges of the rotation cams 1 and 2 at the base end of the concave portion of the workpiece. In the forming posture, the angular ridgeline 5 and the angular ridgeline 6 are smoothly connected, and concave portions are formed from the angular ridgelines 5 and 6, respectively. As shown in FIG. 1, FIG. 4, and FIG. 5, the moving rail 8 is fixed to the rotary cam 2 by the bracket 7, and the rotary cam 2 moves away from the rotary cam 1 when it rotates backward. Of the device. The moving track 8 extends in a direction perpendicular to the rotation axis 4 of the rotary cam 2. When the reverse rotation starts and the backward rotation ends, it is staggered in the axial direction as shown in the figure. The rollers 10 rotatably provided on the lower mold 9 are abutted on both sides of the moving rail 8 to guide the moving rail 8. When turning the rotary cam-2 backward, the guide rail 8 is guided by the roller 10, and the rotary cam 2 moves a preset axial distance L. The movement track 8 is composed of a movement start linear portion, a movement termination linear portion 82, and a slanted intermediate portion 83. When the movement start linear portion 8 ^ and the movement termination linear portion 82 are located between the rollers 10, the rotary cam 2 does not move toward Move in the direction of the axis. In addition, when the rotary cam 2 is rotated by the air cylinder, the connecting portion of the front end of the piston rod of the air cylinder and the rotary cam 2 is set to allow movement in the axial direction of the rotary cam 2. Figures 6 to 8 show the case where the rotary cam 1 is first stopped, and then the rotary cam 2 is moved backward by 30 °. As shown in Fig. 6, when the rotary cam 1 is stopped, and then the rotary cam 2 is rotated backward by 30 °, the end of the rotary cam 1 will interfere with the end of the rotary cam 2. 1 9- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page)

583039 Α7 Β7 V. Description of the invention (7) In the first figure, when the end angle of the rotating cam 2 is 90 °, even if the rotating cam 2 is rotated backward, there will be no interference with the end surface of the rotating cam 1. As shown in the figure, when the end face angle is a corner angle, the end face of the rotary cam 2 will interfere with the end face of the rotary cam 1. When the exposure angle θι is an obtuse angle, the rotating cam 2 will not interfere with the end face of the rotating cam 1. Figures 9 to 7 and 11 show that the rotating cam 1 is stationary, and then the rotating cam 2 is moved backward by 30 °, and the rotating cam 2 is separated from the rotating cam 1 by 1 Omni. The end portion of the rotary cam 2 is formed so as not to interfere with the end portion of the rotary cam 1. Oram's movement is achieved by the mobile devices shown in Figures 1, 4, and 5. In this case, L = 10mm. Figures 12 to 14: Turn the rotary cam 1 back by 20 °, and then rotate the rotary cam 2 back by 30 ° to move 10mm, and the end angle θ2 of the rotary cam 1 is an obtuse angle. interference. In the above embodiment, a moving track and a roller for guiding the moving track are provided as moving means for leaving one rotating cam away from the other rotating cam. However, the present invention is not limited to this form, and a screw can be used. .Wire movement, air cylinder, oil pressure, and lever. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling out this page). Rotary cam 2 moves in such a way as to form a gap between it and rotary cam 1. 1 and the rotary cam 2 move away from each other at the same time. The rotary cam 1 can also be moved after the rotary cam 2 starts to rotate slightly. The rotary cam 1 can also be set to move after the rotary cam 2 completes its rotation. In the manner described above, the rotary cam 2 and the rotary cam 1 are moved in directions away from each other, and it is not necessary to perform retreat processing in order to avoid interference of the ends of the rotary cam 1 and the rotary cam 2, so that the rotary paper can be maintained Standards are applicable to China National Standard (CNS) A4 specifications (210 X 297 mm). Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. . In the above-mentioned embodiment, an example of two rotary cams is described, but the present invention is not limited to this form, and can be applied to three or more rotary cams. In the above-mentioned embodiment, although the examples in which the rotation axes 3 and 4 of the rotation cams 1 and 2 are on the same plane are described, the present invention is not limited to this form, and may include each rotation axis being located on a different plane and inclined Face situation. As described above, in the rotary cam moving device of the negative-angle forming mold provided by the present invention, the negative-angle forming mold is pseudo-formed by: a sheet metal workpiece is placed on a lower die of the support portion; and a linear direction is relative to the lower die. The upper die is formed by pressing and lowering the workpiece to form the workpiece. The upper die includes a rotatable cam which is rotatably provided in the lower die, and a concave forming portion which can be accessed by the upper die's trajectory is formed at an edge portion near the support portion. The recessed forming part is opposite to the above-mentioned rotating cam, and the sliding cam is provided freely and slidably; and the sliding cam is provided in the lower mold, and after the workpiece is formed, the rotary projection can be rotated to retreat until the workpiece can be removed from the lower mold and then retracted. The auto-reset tool made up to the posture makes the workpiece placed on the support part of the lower mold, when the sliding cam slides, it is formed by rotating the concave forming part of the cam and the concave forming part of the sliding cam. After forming, the rotary cam is rotated backward by the automatic reset tool, and the formed workpiece is taken out from the lower die, and a plurality of rotary cams are arranged diagonally. This rotary cam moving device moves one of the adjacent rotary cams away from the other rotary cam when the rotary cam moves in a backward posture, so the interference of the rotary cam can be avoided, and Need to have the precision of the cutting of the end of the rotating cam, and can be -11- This paper size applies Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling in this page w read · An nnnnn δ, β 1 me— l§ ί a— I · ϋ Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 583039 A7 B7 V. Description of the invention (9) Maintain the strength of the end of the rotating cam. In addition, specific and In other words, the present invention is provided with a moving track and a roller for guiding the moving track as a means for moving one rotating cam from the rotating cam of the other. [Simplified description of the drawing] FIG. 1 is A top view of the rotating cam in a forming position according to a specific embodiment of the invention. Fig. 2 is a view of arrow II-II in Fig. 1. Fig. 3 is a view of arrow III-III in Fig. 1. Fig. 4 is Arrow view IV-IV of FIG. 1. FIG. 5 is a view of arrow VV of FIG. 1. FIG. 6 is a top view of a state in which a square rotating cam is rotated backward by 30 ° according to a specific embodiment of the present invention. The figure is the VI-VI arrow view of Figure 6. Figure 8 is the VIII-VIII arrow view of Figure 6. Figure 9 is a view of a specific embodiment of the present invention. Top view of the state where the other cam rotates by the distance required. Fig. 10 is a view of arrow XX in Fig. 9. Fig. 11 is a view of arrow XI-XI in Fig. 9. Fig. 12 makes the present invention specific. One embodiment is a plan view of a state in which the rotating cam of the other side rotates backward by 30 ° and moves relative to the rotating cam of the other side by a required distance, and the rotating cam of the other side moves backward by 20 °. This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page)

583039 A7 B7 V. Description of the invention (10) Figure 13 is the XIII-XIII arrow view of Figure 12. Figure 14 is a view of the XIV-XIV arrow in Figure 12. Fig. 15 is a longitudinal cross-sectional view of the negative-angle forming die for concave forming with the upper die at the top dead center. Fig. 16 is a longitudinal sectional view of a state in which a negative cam forming mold forms a rotary cam by air pressure and red, and the upper mold is lowered to press a workpiece with a pressing block. Fig. 17 is a longitudinal sectional view of a state in which the upper mold of the negative-angle forming mold is lowered, but abuts on the lower mold, and starts to contact the workpiece. Fig. 18 is a longitudinal sectional view of the negative-angle forming mold when the upper mold is at the bottom dead center. Fig. 19 is a longitudinal sectional view showing a state in which the negative-angle forming mold has completed the concave forming process and the upper mold has started to rise. Fig. 20 is a longitudinal sectional view of a state where the upper mold is raised again after the negative-angle forming mold is recessed, and the upper mold is positioned at the top dead center. [Symbol] (Please read the precautions on the back before filling this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 1, 2, 106-Rotating cam 4-Rotating axis 5, 6-Angle ridge 8-Moving track 8ι -Moving start straight line 82-Moving end straight line 8 3 ~ Middle slanted part 9, 102-Lower die 10-Roller 101-Support part 103-Upper die 104-Groove 105-Recessed forming part 107-Recessed forming part 10 8-Sliding cam 109-Air cylinder 110-Pressure block 111-Rotating plate-1 3-This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 583039 A7 B7 V. Description of the invention (11 ) 112 Coil spring 113 Piston rod

W pieces Η (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)

Claims (1)

Printed by the Employees' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 583039 -A8 B8 C8 D8 VI. Patent application scope 1 · A rotary cam moving device of a negative angle forming mold, the negative angle forming mold is supported by: A lower die; and an upper die formed by punching a workpiece in a linear direction relative to the lower die, and forming the workpiece with an upper die, and is provided in the lower die in a freely rotatable manner, and is formed on the edge portion near the support portion. A rotary cam of a concave forming part that the trajectory of the mold enters; a concave cam having a concave forming part that is slidably arranged opposite to the aforementioned rotating cam; and a sliding cam provided in the lower die to rotate the rotary cam after the workpiece is formed An automatic resetting tool that moves backward until the workpiece can be taken out of the lower mold and retracts the posture. When the slide cam slides, the workpiece formed by the rotating cam slides through the recessed forming portion of the cam and slides. The concave forming part of the cam forms the workpiece; after the workpiece is formed, the rotary cam is rotated and retreated by an automatic reset tool, and The workpiece is taken out from the lower mold, and a plurality of rotary cams are arranged diagonally, which is characterized in that the rotary cam moving device moves one of the adjacent rotary cams when the rotary cam rotates in a backward posture, Make it leave from the rotating cam of the other side. 2. If the rotary cam moving device of the negative angle forming die of item 1 of the patent application scope, there is a moving track and a roller for guiding the moving track, as one of the rotating cams and the other of the rotating cams. Means of leaving. -15- This paper size is in accordance with Chinese National Standard (CNS) A4 (210: 297 mm) (Please read the notes on the back before filling this page) A ^