A stamping forming mechanism for wave washer

Abstract

The present invention discloses a stamping and forming mechanism for corrugated washers, comprising: an upper die, a lower die, a blanking punch, a forming punch, a material strip support assembly, a turntable and a motor; the upper die is fixedly connected with a blanking punch and a forming punch; the punching end of the blanking punch is circular, the edge of the punching end of the forming punch is wavy, the blanking punch is arranged directly above the material strip, and the forming punch is arranged on the side of the material strip; a forming cavity is arranged on the lower die, and the forming cavity is located directly below the forming punch; the edge of the forming cavity is wavy and suitable for mutual engagement with the punching end of the forming punch; the motor is used to drive the turntable to rotate; the turntable is provided with a turntable cavity suitable for accommodating annular sheets, and the position of the turntable cavity switches between below the blanking punch and below the forming punch. The present invention thoroughly solves the technical problems of instability of half-cut strip materials and burrs and deformation of product edges, improves the quality of corrugated washers, and brings higher production benefits.

Description

Technical Field

[0001] The invention relates to the field of stamping technology, and in particular to a stamping forming mechanism for a corrugated gasket. Background Art

[0002] Corrugated washers, also known as corrugated gaskets, are thin circular sheets with regular wavy edges. They are generally used to prevent loosening and reduce impact. They have good elasticity and impact resistance.

[0003] At present, the production of corrugated washers mainly adopts the traditional half-shear strip forming method. Figure 1 , the material strip 30 has a number of circular holes. The existing stamping process uses a blanking punch 40 and a forming punch 50. The two punches are located above the material strip and parallel to the conveying direction of the material strip. The process is as follows: 1. Half-shear stamping: During processing, the material strip is quickly conveyed forward, and the blanking punch performs the first stamping on the material strip: by utilizing the ductility of the metal and controlling the stamping depth, a circular ring-shaped thin sheet (semi-finished product) is first punched out on the material strip. At this time, the semi-finished product has not yet completely separated from the material strip, but extends to a certain depth below the material strip, and the edge of the semi-finished product and the material strip are still connected. 2. Forming stamping: The material strip is continuously conveyed, and the semi-finished product reaches below the forming punch. The forming punch performs the second stamping on the material strip: At this time, the forming punch cuts the semi-finished product from the material strip, completely separating it from the material strip and dropping it into the lower die stator of the forming die. Then the forming punch and the lower die stator are closed, and the circular ring thin sheet is punched into a corrugated gasket (finished product) with a wavy edge.

[0004] In the traditional half-cut strip forming process, in order to allow the semi-finished product to be smoothly transferred to the second stamping station on the strip, the first half-cut stamping cannot completely cut the semi-finished product, and the second stamping simultaneously undertakes the two functions of cutting and forming. This process has the following defects: The half-cut quality of the product affects the stability of rapid transmission. Due to the precision of the punch press and the wear of the punch itself, the half-cut depth is difficult to accurately control. If the half-cut depth is too large, the semi-finished product is close to falling off. With the rapid transmission of the strip, the semi-finished product will fall on the die surface in advance and cannot reach the forming station smoothly; If the half-cut depth is too small, the semi-finished product will not be able to effectively separate from the strip during stamping. Moreover, the product is not completely cut during the half-cut, resulting in large burrs on the edge of the product and product deformation. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a stamping and forming mechanism for corrugated washers, which also uses a blanking punch and a forming punch to perform two stamping processes; the blanking punch directly cuts the circular ring sheet from the material strip, and then transports the semi-finished circular ring sheet to the bottom of the forming punch through a turntable, and the forming punch then punches the semi-finished product into a corrugated washer.

[0006] The present invention is achieved by adopting the following technical solutions:

[0007] A stamping and forming mechanism for a corrugated gasket, comprising: an upper die, a lower die, a blanking punch, a forming punch, a material strip supporting assembly, a turntable and a motor; the material strip supporting assembly is fixedly arranged on the lower die for supporting the material strip; the upper die is fixedly connected with a blanking punch and a forming punch; the stamping end of the blanking punch is circular, the edge of the stamping end of the forming punch is wavy, the blanking punch is arranged directly above the material strip, and the forming punch is arranged on the side of the material strip; a forming cavity is arranged on the lower die, and the forming cavity is located directly below the forming punch; the edge of the forming cavity is wavy and is suitable for mutual engagement with the stamping end of the forming punch; the motor is transmission-connected to the turntable for driving the turntable to rotate; a turntable cavity suitable for accommodating annular sheets is arranged on the turntable, and the motor drives the turntable to rotate on the lower die, and the position of the turntable cavity is switched between below the blanking punch and below the forming punch.

[0008] Furthermore, the stamping and forming mechanism for the corrugated gasket also includes: a blow pin; the blow pin is arranged on the side of the forming cavity, and the blowing hole of the blow pin faces the forming cavity; the blow pin is connected to an external air source.

[0009] Furthermore, a gasket slide is provided on the lower mold; the gasket slide is arranged at the other end of the molding cavity relative to the blow pin, the gasket slide is connected to an edge of the molding cavity, and the cross-section of the gasket slide is wavy to be suitable for the sliding of the corrugated gasket.

[0010] Furthermore, the stamping forming mechanism for the corrugated gasket also includes: a motor cam, an adapter block and an adapter shaft; the motor cam is fixedly connected to the output shaft of the motor, and the motor cam is provided with a protruding top column; the adapter block is provided with a slide groove suitable for cooperating with the top column, and the slide groove is in the shape of a long strip; the adapter shaft is fixedly connected to the side of the motor cam, the adapter block and the turntable are both pivotally connected to the adapter shaft, the adapter block is fixedly connected to the bottom of the turntable, and the adapter block rotates in conjunction with the turntable.

[0011] Furthermore, the turntable is in a cross-shaped structure, and each of the four protruding ends is provided with a turntable cavity; the adapter block is in a cross-shaped structure, and each of the four protruding ends is provided with a slide groove.

[0012] Furthermore, the material strip supporting assembly includes supporting pins and supporting blocks; the lower mold is provided with two rows of supporting pins in parallel, the two supporting blocks are fixedly connected to the supporting pins, a slideway is opened on the inner side of the supporting block, and the material strip is placed in the slideway.

[0013] Furthermore, the lower mold includes a lower backing plate and a lower pad; the lower pad is fixedly arranged at the bottom of the lower backing plate; the lower backing plate is provided with a rotating cavity suitable for the turntable to rotate therein, and the turntable is rotatably arranged in the rotating cavity; the molding cavity is opened on the lower pad.

[0014] Furthermore, the lower mold also includes a lower mold base, lower feet and a lower support plate; the lower mold base is fixedly arranged at the bottom of the lower support plate, and the four lower feet are respectively arranged at the four corners of the bottom of the lower mold base; the lower support plate is fixedly arranged at the bottom of the lower feet; the motor is fixedly arranged on the lower support plate.

[0015] Compared with the prior art, the beneficial effects that can be achieved by the present invention are as follows: after the material strip starts to be conveyed, the blanking punch punches the material strip, and the semi-finished circular ring piece is punched out from the material strip at one time. The semi-finished circular ring piece is completely cut off from the material strip and falls into the turntable cavity. Then the turntable is driven by a motor, and the turntable cavity drives the semi-finished circular ring piece to move to the forming cavity. Then the forming punch punches the circular ring piece, so that the circular ring piece is punched and formed into a finished corrugated gasket. The present invention completes the forming of the corrugated gasket through a new process and structure. Different from the traditional semi-cut strip forming process, the present invention uses a blanking punch to completely cut out the semi-finished product at one time, and then transfers the semi-finished product to the forming punch through the turntable for forming. In this way, the problems in the semi-cut strip forming process are solved: the blanking punch punching depth is too large, causing the semi-finished product to fall onto the die surface, so that it cannot smoothly reach the forming station and needs manual cleaning; and the blanking punch punching depth is too small, causing the forming punch to be unable to effectively cut out from the material strip. The present invention completely solves the technical problems of instability of half-shear strip material and burrs and deformation on product edges. It is no longer necessary to consider the depth of half-shear punching, thereby improving the quality of the corrugated gasket and bringing higher production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a half-shear strip forming punching mechanism in the prior art;

[0017] Figure 2 It is a schematic diagram of the material strip, the semi-finished circular ring sheet, and the corrugated gasket;

[0018] Figure 3 It is a three-dimensional schematic diagram of the present invention;

[0019] Figure 4 Another perspective schematic diagram of the present invention;

[0020] Figure 5 It is a front view of the present invention;

[0021] Figure 6 This is a three-dimensional diagram of the present invention after the turntable is hidden;

[0022] Figure 7 for Figure 6 A partial enlarged view of the middle A;

[0023] Figure 8 The exploded view of the motor, adapter block, turntable and adapter shaft;

[0024] Fig. 9 This is a schematic diagram of the motion flow of the motor-driven adapter block.

[0025] In the figure: 10, semi-finished circular ring; 20, corrugated gasket; 30, material strip; 40, blanking punch; 50, forming punch; 60, lower die; 61, lower backing plate; 62, lower pad; 63, lower die seat; 64, lower pad; 65, lower support plate; 70, turntable; 71, turntable cavity; 80, motor; 90, forming cavity; 100, blow pin; 110, gasket slide; 120, motor cam; 121, ejector column; 130, adapter block; 131, slide groove; 140, adapter shaft; 150, support pin; 160, support block. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0027] The present invention discloses a stamping and forming mechanism for a corrugated gasket, which includes two stamping processes, namely, cutting out a semi-finished circular ring sheet 10 from a material strip 30, and stamping and forming the semi-finished circular ring sheet 10 into a corrugated gasket 20. The structure of the material strip 30, the semi-finished circular ring sheet 10 and the finished corrugated gasket 20 is schematically shown as follows: Figure 2 shown.

[0028] See also Figure 3-Figure 7 The present invention comprises: an upper die, a lower die 60, a blanking punch 40, a forming punch 50, a material strip support assembly, a turntable 70 and a motor 80. Among them:

[0029] The upper die (not shown) is fixedly connected with a blanking punch 40 and a forming punch 50. When the upper die is pressed down and pressed together with the lower die 60, the two punches can perform stamping. Since the upper die itself is part of the punch press and is not within the scope of improvement of the present invention, its structure is not shown here to make the illustration more concise and clear. Only the structure and position of the blanking punch 40 and the forming punch 50 are shown.

[0030] The material strip support assembly is fixedly arranged on the lower die 60 for supporting the material strip 30; during production, the material strip 30 is quickly transported in the material strip support assembly. The blanking punch 40 is arranged directly above the material strip 30, and the punching end of the blanking punch 40 is circular, and its function is to punch out the semi-finished circular ring sheet 10 from the material strip 30; the forming punch 50 is arranged on the side of the material strip 30, and the edge of the punching end of the forming punch 50 is wavy. The lower die 60 is provided with a forming cavity 90, and the forming cavity 90 is located directly below the forming punch 50, and the edge of the forming cavity 90 is wavy and suitable for mutual engagement with the punching end of the forming punch 50; the forming punch 50 cooperates with the forming cavity 90 to punch the semi-finished circular ring sheet 10 into a corrugated washer 20.

[0031] The motor 80 is connected to the turntable 70 in a transmission manner and is used to drive the turntable 70 to rotate; a turntable cavity 71 suitable for accommodating the semi-finished circular ring piece 10 is provided on the turntable 70, and the motor 80 drives the turntable 70 to rotate on the lower die 60, and the position of the turntable cavity 71 is switched between below the blanking punch 40 and below the forming punch 50. Specifically, when the turntable cavity 71 moves to below the blanking punch 40, the semi-finished circular ring piece 10 punched out will fall into the turntable cavity 71, and then the turntable 70 is driven to rotate by the motor 80, and the turntable cavity 71 moves to below the forming punch 50, and then the forming punch 50 performs stamping and forming on the semi-finished circular ring piece 10 in the turntable cavity 71, and the corrugated washer 20 can be prepared.

[0032] Preferably, the present invention further comprises a blow pin 100. Figure 7 The blow pin 100 is arranged at the side of the molding cavity 90, and a blow hole is arranged on the blow pin 100, and the blow hole faces the molding cavity 90; the blow pin 100 is connected to an external air source. Its function is to blow the corrugated gasket 20 out of the molding cavity 90 after it is formed. A receiving tray can be placed under the lower mold 60 to realize the unloading of the corrugated gasket 20.

[0033] Preferably, a washer slideway 110 is also provided on the lower mold 60. Figure 7The washer slide 110 is arranged at the other end of the molding cavity 90 relative to the blow pin 100; one end of the washer slide 110 is connected to the molding cavity 90, and the other end is connected to the side of the lower mold 60. The cross section of the washer slide 110 is wavy, so that the corrugated washer 20 can slide on it. Its function is: after molding, the corrugated washer 20 is in an uneven shape and is completely embedded in the molding cavity 90. At this time, it needs to be blown out by the blow pin 100. The washer slide 110 can make the corrugated washer 20 slide out of the molding cavity 90 smoothly, and the contact area is large, the friction generated is small, and the surface of the corrugated washer 20 is not easy to be scratched.

[0034] Preferably, the present invention further comprises a motor cam 120, an adapter block 130 and an adapter shaft 140. Referring to Fig. 8, the transmission relationship between the motor 80 and the turntable 70 is specifically as follows: the motor cam 120 is fixedly connected to the output shaft of the motor 80, and a protruding top column 121 is provided on the motor cam 120; a slide groove 131 suitable for cooperating with the top column 121 is provided on the adapter block 130, and the slide groove 131 is in the shape of a long strip; the adapter shaft 140 is fixedly connected to the side of the motor cam 120, the adapter block 130 and the turntable 70 are both pivotally connected to the adapter shaft 140, the adapter block 130 is fixedly connected to the bottom of the turntable 70, and the adapter block 130 and the turntable 70 rotate in conjunction with each other. The transmission process between the motor 80 and the turntable 70 is as follows: when the motor 80 is driven, the push column 121 rotates along with the motor cam 120 and enters into the slide groove 131 on the turntable 70; as the push column 121 further rotates, the slide groove 131 will be pushed to move, thereby causing the adapter block 130 to rotate around the adapter shaft 140. At this time, the turntable 70 fixed on the adapter block 130 also rotates, causing the turntable cavity 71 to rotate, and the semi-finished circular ring piece 10 is transferred.

[0035] For further optimization, see Figure 8 The turntable 70 is a cross-shaped structure, and a turntable cavity 71 is provided on each of its four protruding ends; the adapter block 130 is also a cross-shaped structure, and a slide groove 131 is provided on each of its four protruding ends. Fig. 9Every time the motor cam 120 rotates 360°, the push column 121 will only cooperate with one of the slide grooves 131 to push the turntable 70 in the opposite direction by 90°, completing a transfer process; and after each transfer process is completed, the next slide groove 131 can be in place, waiting for the next work cycle. Since the semi-finished annular sheet 10 needs to wait for the forming punch 50 to perform stamping after being transferred to the forming station, the turntable 70 needs to stop rotating for a period of time. If the turntable 70 is directly connected to the motor 80, the motor 80 needs to be started and stopped frequently, which affects the life of the motor 80. By setting the motor cam 120, the push column 121, and the adapter block 130 to achieve the transfer, the turntable 70 can achieve intermittent motion while the motor 80 continues to rotate: refer to Fig. 9 The motor 80 rotates 360° counterclockwise. During the 90° stroke, the turntable 70 rotates 90° clockwise, and the turntable 70 stops rotating during the remaining 270° stroke, providing time for the forming and stamping to achieve timing coordination.

[0036] Preferably, the material strip support assembly includes support pins 150 and support blocks 160. The lower mold 60 is provided with two rows of support pins 150 in parallel, and two support blocks 160 are fixedly connected to the support pins 150. A slideway is provided inside the support block 160, and the material strip 30 is placed in the slideway 131. Its function is to provide support and a sliding channel for the fast-transported material strip 30.

[0037] Preferably, see Figure 5 The lower mold 60 includes a lower back plate 61 and a lower pad 62; the lower pad 62 is fixedly arranged at the bottom of the lower back plate 61; Figure 3 The lower back plate 61 is provided with a rotating cavity suitable for the rotating disk 70 to rotate therein, and the rotating disk 70 is rotatably arranged in the rotating cavity; the molding cavity 90 and the washer slideway 110 are opened on the lower pad 62. Further preferably, the lower mold 60 further includes a lower mold base 63, a lower pad foot 64 and a lower supporting plate 65; the lower mold base 63 is fixedly arranged at the bottom of the lower pad 62, and the four lower pad feet 64 are respectively arranged at the four corners of the bottom of the lower mold base 63; the lower supporting plate 65 is fixedly arranged at the bottom of the lower pad foot 64; and the motor 80 is fixedly arranged on the lower supporting plate 65.

[0038] The working process of the present invention is as follows: the starting position of the turntable cavity 71 is below the blanking punch 40. After the material belt 30 starts to be conveyed, the blanking punch 40 is pressed onto the lower die 60 to punch out the semi-finished circular ring piece 10 in the turntable cavity 71; the motor 80 drives, and the top column 121 on the motor cam 120 enters the slide groove 131 on the adapter block 130, and the adapter block 130 is rotated 90° by pushing the slide groove 131, and at the same time, the turntable cavity 71 is rotated 90°, so that the semi-finished circular ring piece 10 moves into the forming cavity 90; then the forming punch 50 is pressed with the forming cavity 90, so that the semi-finished circular ring piece 10 is punched into a corrugated washer 20. After molding, the motor 80 continues to drive until the turntable cavity 71 is away from the molding cavity 90 (preferably, the turntable cavity 71 is 50° to the molding punch 50). At this time, the turntable cavity 71 will not block the subsequent blowing or other unstable factors. The blowing pin 100 blows air to blow the corrugated gasket 20 out along the gasket slide 110.

[0039] Through the detailed description of the above embodiments, it can be understood that the present invention completely cuts out the semi-finished product at one time, and then transfers the semi-finished product to the forming punch for forming through a turntable. In this way, the following problems are solved in the half-shear strip forming process: the punching depth of the blanking punch is too large, causing the semi-finished product to fall onto the die surface, thus failing to reach the forming station smoothly and requiring manual cleaning; and the punching depth of the blanking punch is too small, causing the forming punch to be unable to effectively cut out from the strip. The present invention thoroughly solves the technical problems of instability of half-shear strip materials and burrs and deformation on the edges of products. It is no longer necessary to consider the depth of half-shear punching, which improves the quality of the corrugated gasket and brings higher production efficiency.

[0040] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A stamping forming mechanism for a corrugated washer, characterized in that: include: An upper die, a lower die, a blanking punch, a forming punch, a material strip supporting assembly, a turntable and a motor; the material strip supporting assembly is fixedly arranged on the lower die for supporting the material strip; the upper die is fixedly connected with a blanking punch and a forming punch; the punching end of the blanking punch is circular, the edge of the punching end of the forming punch is wavy, the blanking punch is arranged directly above the material strip, and the forming punch is arranged on the side of the material strip; a forming cavity is arranged on the lower die, and the forming cavity is located directly below the forming punch; the edge of the forming cavity is wavy and suitable for mutual engagement with the punching end of the forming punch; the motor is transmission-connected to the turntable for driving the turntable to rotate; a turntable cavity suitable for accommodating annular sheets is arranged on the turntable, and the motor drives the turntable to rotate on the lower die, and the position of the turntable cavity is switched between below the blanking punch and below the forming punch; The stamping and forming mechanism for the corrugated gasket further comprises: a blow pin; the blow pin is arranged at the side of the forming cavity, and the blow hole of the blow pin faces the forming cavity; The air blowing pin is connected to an external air source; The lower mold is also provided with a washer slide; the washer slide is provided at the other end of the molding cavity relative to the blow pin, the washer slide is communicated with an edge of the molding cavity, and the cross section of the washer slide is wavy to be suitable for the corrugated washer to slide; The lower mold includes a lower backing plate and a lower pad; the lower pad is fixedly arranged at the bottom of the lower backing plate; the lower backing plate is provided with a rotating cavity suitable for the rotating disk to rotate therein, and the rotating disk is rotatably arranged in the rotating cavity; the molding cavity is opened on the lower pad.

2. The stamping and forming mechanism for a corrugated washer according to claim 1, characterized in that: The stamping and forming mechanism for the corrugated gasket also includes: a motor cam, an adapter block and an adapter shaft; the motor cam is fixedly connected to the output shaft of the motor, and a protruding top column is provided on the motor cam; the adapter block is provided with a slide groove suitable for cooperating with the top column, and the slide groove is in the shape of a long strip; the adapter shaft is fixedly connected to the side of the motor cam, the adapter block and the turntable are both pivotally connected to the adapter shaft, the adapter block is fixedly connected to the bottom of the turntable, and the adapter block rotates in conjunction with the turntable.

3. The stamping and forming mechanism for a corrugated washer according to claim 2, characterized in that: The turntable is in a cross-shaped structure, and a turntable cavity is respectively arranged on the four protruding ends; the adapter block is in a cross-shaped structure, and a slide groove is respectively arranged on the four protruding ends.

4. The stamping and forming mechanism for a corrugated washer according to claim 1, characterized in that: The material strip supporting assembly includes supporting pins and supporting blocks; the lower mold is provided with two rows of supporting pins in parallel, two supporting blocks are fixedly connected to the supporting pins, a slideway is provided on the inner side of the supporting block, and the material strip is placed in the slideway.

5. The stamping and forming mechanism for a corrugated washer according to claim 1, characterized in that: The lower die also includes a lower die base, lower pads and a lower support plate; the lower die base is fixedly arranged at the bottom of the lower pad, and the four lower pads are respectively arranged at the four corners of the bottom of the lower die base; the lower support plate is fixedly arranged at the bottom of the lower pads; the motor is fixedly arranged on the lower support plate.

Images