CN204182800U - A kind of compound punching structure for punch level progressive die - Google Patents

Abstract

The utility model relates to a stamping process, in particular to a composite stamping structure for a stamping progressive die, which comprises: an upper die fixing plate, which is fixed on the bottom of the upper die seat, and is connected with a spring pressure unloading plate through a first spring below it. There is a blanking bending convex and concave die in the middle of the upper die fixing plate and the spring pressure unloading plate, and the upper die pressing block is fitted inside the blanking bending convex and concave die, and the upper die pressing block is installed on the bottom of the upper die seat through the second spring; punching Die, which is fixed on the lower die base, a pusher block is arranged inside the punching die, and a movable bending punch is arranged inside the pusher block, which is installed on the lower die base through the third spring, and the pusher block passes through the first The four springs are installed on the lower mold base; the thrust of the first spring is greater than the top force of the third and fourth springs, and the bottom of the spring-pressing unloading plate is provided with a pressing bar capable of pressing down on the push piece; the purpose is to provide a A composite stamping structure for stamping progressive dies that realizes the composite stamping process of pressing, punching, bending, and pushing out in one position.

Description

A Composite Stamping Structure for Stamping Progressive Die

technical field

The utility model relates to a stamping technology, in particular to a composite stamping structure used for stamping progressive dies.

Background technique

The process method of progressive stamping in the stamping process is to achieve high-speed, high-efficiency, high-quality stamping production mode, and the mold used in the progressive stamping process is a multi-station progressive die. In the design of multi-station progressive dies, in order to ensure the quality of stamping parts, the strength of the mold and the reliability of stamping forming, generally only a single stamping process is completed at each station. This method of process arrangement, for some part parts that are related to size and precision, sometimes it is difficult to meet the requirements of stamping quality, or it is necessary to design some special structures in the mold design to ensure the quality requirements. The more the number of stations in the mold is, the greater the accumulated error will be when stamping. Especially for the stamping production of some larger-sized automobile sheet metal stamping parts, adding one station will increase the size of the mold by one feeding step size, which will eventually increase the manufacturing cost of the mold and the choice of a larger worktable size press. Designing composite stations in progressive dies and completing stamping processes of different natures at the same time can improve the quality and production efficiency of stamping parts, and at the same time reduce the size of the die and reduce the cost of the die.

Utility model content

Aiming at the problems existing in the prior art, the purpose of the invention of this utility model is to provide a compound stamping structure for stamping progressive dies which realizes the compound stamping process of pressing, punching, bending and pushing out in one stamping station.

In order to achieve the above object, the technical solution adopted by the utility model is:

A composite stamping structure for stamping progressive dies, which includes a lower die base and an upper die base corresponding to it, the upper die base can move up and down relative to the lower die base and when it moves down to the top of the lower die base, it can be aligned with the lower die base The base is matched, and a composite stamping device is arranged between the upper die base and the lower die base, which includes:

The upper mold fixing plate is fixed on the bottom of the upper mold base, and the spring pressure unloading plate is connected to the bottom of it through the first spring. Bending convex and concave dies, blanking and bending convex and concave dies are equipped with upper mold pressing blocks inside, the blanking and bending convex and concave dies are fixedly installed on the bottom of the upper die base, and the upper die pressing blocks are installed on the bottom of the upper die base through the second spring, free In the state, the bottom of the blanking bending punch and die is at the same height as the bottom of the pressing block of the upper mold and the bottom of the spring pressure unloading plate;

The blanking die is fixed on the lower die base, the inside of the punching die is provided with a second through hole, the inside of which is equipped with a pusher block, and the inside of the pusher block is provided with a movable bending punch, which passes through the third The spring is installed on the lower die base, and the pusher block is installed on the lower die base through the fourth spring, which can move within a fixed height inside the punching die. In a free state, the punching die and the pusher block , The top of the movable bending punch is at the same height;

The thrust of the first spring is greater than the top force of the third and fourth springs, the thrust of the second spring is greater than the top force of the third spring, and the bottom of the elastic pressure unloading plate is provided with a push piece that can press down, so that the push piece The pressing bar that moves downward inside the blanking die, the blanking bending male and female die can extend downwards into the punching die and move on the moving path of the push piece block, the first spring, the second spring The modulus of elasticity of the third spring and the fourth spring is set to satisfy: during the downward movement of the upper die base, the push piece moves down to the top of the lower die base, and the bottom of the blanking and bending punch and die is pressed against the upper die during this process. The bottom of the material block and the spring pressure unloading plate are at the same height, the top of the punching die and the movable bending punch are at the same height, when the upper die base continues to move down, the blanking die and the spring pressure unloading plate are attached, and the first spring starts Compression, the blanking bending punch and die and the upper mold pressing block continue to press down synchronously, after the movable bending punch moves to the top of the lower die base, the second spring starts to compress.

On this compound station, the first step-off mechanism is designed when the mold is punching downward. The step-off mechanism is made up of an elastic pressure unloading plate installed on the upper die, an unloading plate spring (the first spring), a pressure bar, and a pusher block installed on the lower die base, and a pusher block spring (the fourth spring). When the mechanism is moving down the mold, since the pressure of the spring (the first spring) installed on the spring-pressing unloading plate is greater than the force of the spring (the fourth spring) installed under the push block, the pressure rod first presses the push block down to the next level. The space where the top of the mold base is in contact and the push piece goes down is the space required for punching, bending, and trimming of the working edge of the mold. When the push block is in place, the upper mold pressing block and the movable bending punch of the upper and lower mold bases clamp and position the material belt under the action of the spring force, and the mold continues to descend to complete the compound process of blanking, bending and shaping. After the forming is completed, the mold returns, and the mechanism returns to reset. At this time, the push block in the mechanism pushes the formed bent parts and strips out of the concave model hole under the action of the spring force. The lowest position of the bent part is higher than the feeding surface of the mold. 1.5~3mm, so that the feeding device can feed the material reliably. After the material is delivered in place, the next cycle is carried out, realizing the compound stamping process of pressing, punching, bending and pushing out in one stamping station, and two or more stamping processes can be completed in the same station of the progressive die , and can reduce the number of stations in the progressive die, reduce the size of the die and the cumulative error of continuous progressive stamping, and ensure the quality of stamping parts.

As a preferred solution of the present utility model, the upper die fixing plate is installed on the bottom of the upper die base through the upper die backing plate, and the upper die backing plate has a buffering effect to increase the life of the stamping structure.

As a preferred solution of the utility model, the punching die is installed on the top of the lower die seat through the backing plate of the lower die, and the backing plate of the lower die has a buffering effect to increase the life of the stamping structure.

As a preferred solution of the present utility model, the top of the spring pressure unloading plate is fixed with a spring pressure unloading back plate, the top of which is connected with the bottom of the upper mold fixing plate through the first spring, and the pressure rod is installed at the bottom of the spring pressure unloading back plate, and the spring pressure unloading plate There is a through hole on the material plate for the pressure rod to pass through, which acts as a buffer and increases the life of the stamping structure. At the same time, the spring connection is easy to wear and damage. This structure is convenient for replacement and reduces the cost of replacement.

As a preferred solution of the present invention, a guide post is provided between the bottom of the upper die base and the corresponding position on the top of the lower die base to drive the movement of the upper die base, and a guide sleeve is provided outside the guide post to provide power for stamping.

As a preferred solution of the present utility model, the installation place of the second spring is located inside the upper die base and communicates with the top of the upper die base, and a first screw plug is installed in the gap between the second spring and the outside of the upper die base to facilitate the installation of parts. Maintenance and replacement can improve the efficiency of maintenance and reduce the difficulty of maintenance.

As a preferred solution of the present utility model, the installation of the third spring is located inside the lower mold base and communicates with the bottom of the lower mold base, and a second screw plug is installed in the gap between the third spring and the outside of the lower mold base to facilitate the installation of parts. Maintenance and replacement can improve the efficiency of maintenance and reduce the difficulty of maintenance.

As a preferred solution of the present utility model, the upper die pressing block is positioned through the center of the second spring through the first positioning shaft, and a pressing block pushing block is arranged between the top of the upper die pressing block and the bottom of the second spring, which is in contact with the upper die pressing block. The internal cooperation of the mold backing plate ensures the positioning accuracy of the pressing material block of the upper mold and the quality of the stamping workpiece.

As a preferred solution of the present utility model, the movable bending punch is positioned through the center of the third spring through the second positioning shaft, and a bending punch pushing block is arranged between the bottom of the movable bending punch and the top of the third spring, which is connected to the bottom of the third spring. The internal cooperation of the die backing plate ensures the positioning accuracy of the movable bending punch and the quality of the punched workpiece.

As a preferred solution of the utility model, the parts formed by the stamping strip of the composite stamping device are parts that need to be bent and formed on the left and right sides, which are a type of typical parts used in the utility model (as shown in Figure 9), usually in the progressive die The forming scheme designed in the middle is to use two different stations for forming. The front station completes the separation and cutting of the bending edge of the part and the strip, and then completes the bending at the second station. The utility model is designed on one station. At the same time, the separation and bending of the two sides and the strip are completed.

The beneficial effects of the utility model are:

Two or more stamping processes can be completed at the same station of the progressive die, and the number of stations of the progressive die can be reduced, the size of the die and the accumulated error of continuous progressive stamping can be reduced to ensure the quality of stamping parts.

Description of drawings

Fig. 1 is a schematic diagram of the initial state structure of the utility model.

Fig. 2 is a schematic diagram of the working state structure of the utility model.

Fig. 3 is the first schematic diagram of the stamping process of the present invention.

Fig. 4 is a second schematic diagram of the stamping process of the present invention.

Fig. 5 is a third schematic diagram of the stamping process of the present invention.

Fig. 6 is a fourth schematic diagram of the stamping process of the present invention.

Fig. 7 is a fifth schematic diagram of the stamping process of the present invention.

Fig. 8 is a sixth schematic diagram of the stamping process of the present invention.

Fig. 9 is a schematic cross-sectional structure diagram of the parts processed by the utility model.

Marks in the figure: 1-first screw plug, 2-second spring, 3-upper die backing plate, 4-upper die seat, 5-guide sleeve, 6-blanking punch and die for blanking, 7-upper die fixing plate, 8-Back plate of spring pressure unloading plate, 9-Pressure material block of upper mold, 10-Spring pressure unloading plate, 11-Pressure bar, 12-Push piece block, 13-Fourth spring, 14-Active bending punch, 15-Down Die base, 16-second screw plug, 17-third spring, 18-bending punch push block, 19-lower die backing plate, 20-blanking die, 21-guide column, 22-material belt, 23- Binder block push block, 24-the first spring.

Detailed ways

The utility model will be further described in detail below in conjunction with examples and specific implementation methods. However, it should not be understood that the scope of the above subject matter of the utility model is limited to the following embodiments, and all technologies realized based on the content of the invention of the utility model belong to the scope of the utility model.

Example 1

As shown in Figure 1-9, a composite stamping structure for stamping progressive dies, which includes a lower die base 15, and an upper die base 4 corresponding thereto, the upper die base 4 can move up and down relative to the lower die base 15 and lower Cooperate with the lower die base 15 when moving to the top of the lower die base 15, and a compound stamping device is arranged between the upper die base 4 and the lower die base 15, which includes:

The upper mold fixing plate 7 is fixed on the bottom of the upper mold base 4, and the spring pressure unloading plate 10 is connected below it through the first spring 24, and the middle part of the upper mold fixing plate 7 and the elastic pressure unloading plate 10 is provided with a first through hole. It is equipped with a blanking and bending convex and concave die 6 inside, and an upper mold pressing block 9 is matched inside the blanking and bending convex and concave die 6. The blanking and bending convex and concave die 6 is fixedly installed on the bottom of the upper mold base 4, and the upper mold pressing block 9 The second spring 2 is installed on the bottom of the upper mold base 4, and the bottom of the blanking bending punch 6 in the free state is at the same height as the bottom of the upper mold pressing material block 9 and the bottom of the elastic pressure unloading plate 10;

The blanking die 20 is fixed on the lower die base 15, the inside of the punching die 20 is provided with a second through hole, the inside of which is equipped with a pusher block 12, and the inside of the pusher block 12 is provided with a movable bending punch 14, which is installed on the lower mold base 15 through the third spring 17, and the pusher block 12 is installed on the lower mold base 15 through the fourth spring 13, and can move within a fixed height inside the blanking die 20, freely The tops of the blanking die 20, the push piece block 12, and the movable bending punch 14 are at the same height in the state;

The thrust of the first spring 24 is greater than the thrust of the third and fourth springs, the thrust of the second spring 2 is greater than the thrust of the third spring 17, and the bottom of the elastic pressure discharge plate 10 is provided with a pusher block 12 capable of pressing down , the push bar 11 that makes the pusher block 12 move downward inside the blanking die 20, and the blanking bending die 6 can extend downward into the punching die 20, on the moving path of the pusher block 12 move.

In this embodiment, the upper die fixing plate 7 is installed on the bottom of the upper die base 4 through the upper die backing plate 3 , and the punching die 20 is installed on the top of the lower die base 15 through the lower die backing plate 19 .

The top of the elastic unloading plate 10 is fixed with an elastic unloading back plate, the top of which is connected to the bottom of the upper mold fixing plate 7 through the first spring 24, and the pressure rod 11 is installed on the bottom of the elastic unloading back plate, on the elastic unloading plate 10. There is a through hole for the pressure rod 11 to pass through; a guide post 21 for driving the movement of the upper die base 4 is provided between the bottom of the upper die base 4 and the corresponding position on the top of the lower die base 15, and a guide post 21 is provided outside the guide post 21. Set of 5.

In this embodiment, the installation place of the second spring 2 is located inside the upper die base 4 and communicates with the top of the upper die base 4, and the first screw plug 1 is installed in the gap between the second spring 2 and the outside of the upper die base 4, The installation place of the third spring 17 is located inside the lower mold base 15 and communicates with the bottom of the lower mold base 15 , and the second screw plug 16 is installed in the gap between the third spring 17 and the outside of the lower mold base 15 .

The upper mold pressing block 9 is positioned through the center of the second spring 2 through the first positioning shaft, and a pressing block push block 23 is arranged between the top of the upper mold pressing material 9 and the bottom of the second spring 2, which is connected with the upper mold backing plate 3 internal cooperation, the movable bending punch 14 is positioned through the center of the third spring 17 through the second positioning shaft, and a bending punch pushing block 18 is arranged between the bottom of the movable bending punch 14 and the top of the third spring 17, which is in contact with The lower mold backing plate 19 is internally matched.

work process:

Fig. 1 is the initial state, at this time, the material belt 22 is held up by the feeding plane of the material belt 22 under the action of the floating support pin. At this time, the pusher block 12 is in the initial position under the action of the pusher block 12 springs (the fourth spring 13); Spring 17) is also in initial position under the effect; Depression bar 11 has not yet acted on push piece block 12, and whole mechanism is in initial state, and the cutting edge of mold has not entered working position yet.

Along with the downward movement of the press, since the thrust of the spring (first spring 24) acting on the spring of the spring (the first spring 24) of the spring to press the discharge plate 10 is greater than the top of the spring (the fourth spring 13) of the push piece 12 of the push piece 12 Force, the pressing rod 11 installed on the spring-pressing unloading plate 10 pushes the pusher block 12 to move downward during the downward movement of the mold, and the pusher spring (the fourth spring 13) is compressed until the lower plane of the pusher block 12 is aligned with the lower The plane contact on the backing plate 19 ensures the required forming space when the composite station is formed. The upper die continues to move downward, and the stripper spring (the first spring 24) and the bending punch spring (the third spring 17) are compressed. At this moment, spring press the unloading plate 10 and the blanking die 20, and the upper mold pressing block 9 and the movable bending punch 14 compress the material. The mold continues to descend to realize punching separation and bending deformation of the forming part, as shown in Figure 2.

When the press returns, the mold is opened, the upper mold base 4 rises, and the pusher block 12 pushes the bent part out from the movable bending punch 14 under the action of the spring of the pusher block 12 (the fourth spring 13) , The launch height is 14 (1.5-3) mm higher than the movable bending punch.

More specific process, as shown in Figure 3-8, the mold shown in Figure 3 is in the mold opening state (same as Figure 1), and the composite stamping station is in the initial state. With the downward movement of the upper die base 4, since the pressure of the unloading plate spring (the first spring 24) is greater than the thrust of the spring (the fourth) of the push piece block 12, when the upper die base 4 goes down, it is installed in the spring pressure discharge The pressing rod 11 on the board back board 8 pushes the pusher block 12 to move downward (the fourth spring 13 is compressed). At this moment, the bottom of the pusher block 12 is in contact with the upper surface of the lower die backing plate 19, and the distance that the pusher block 12 goes down is the blanking, bending, and shaping space for the composite station. The die continues to descend, the first spring 24 is compressed, and the spring presses the unloading plate 10 and the blanking die 20 to compress the material strip 22 . At the same time, the upper mold pressing block 9 and the movable bending punch 14 clamp the strip 22, and the blanking bending punch 6 and the blanking die 20 are ready to punch the material, as shown in FIG. 4 .

Fig. 5 shows that the mold continues to move downward, and the composite station realizes the blanking and separation process of the material strip 22 under the joint action of the blanking bending convex and concave mold 6 and the punching concave mold 20 . The upper die continues to descend, and under the joint action of the blanking bending punch 6 and the movable bending punch 14, the bending deformation of the composite station is realized, as shown in FIG. 6 . Due to the high flatness requirements of the workpiece, the mold continues to press down to the bottom dead center formed by the punching machine to realize shaping to ensure the precision requirements of the workpiece, as shown in Figure 7.

Figure 8 shows the return of the upper die after the stamping is completed. Due to the mold opening, the pressure of the spring (first spring 24) that presses the unloading plate 10 is released, and the pressure of the push rod 11 on the push piece 12 gradually decreases, and finally breaks away from the push piece 12, and the push piece 12 is pushing Under the action of the piece plate spring (the fourth spring 13), the workpiece is pushed out of the blanking die 20, and the push piece block 12 returns to its original state. At this time, the feeding mechanism feeds the material, and after the feeding is completed, the next cycle starts.

Claims (10)

1. the compound punching structure for punch level progressive die, it comprises die shoe, and the upper bolster corresponding with it, coordinates when upper bolster can move up and down relative to die shoe and move down into die shoe top with die shoe, be provided with compound punching device between upper bolster and die shoe, it comprises:

Upper mould fixed plate, it is fixed on the bottom of upper bolster, elastic stripper is connected with by the first spring below it, the first through hole is provided with in the middle part of upper mould fixed plate and elastic stripper, its internal engagement has blanking bending punch-die, blanking bending punch-die internal engagement has patrix binder block, described blanking bending punch-die is fixedly installed in bottom upper bolster, described patrix binder block by the second spring fitting bottom upper bolster, co-altitude bottom the bottommost of described blanking bending punch-die and patrix binder block, elastic stripper under free state;

Punching and blanking die, it is fixed on described die shoe, punching and blanking die inside is provided with the second through hole, its internal engagement has ejector block, ejector block inside is provided with active bending punch, and it is by the 3rd spring fitting on die shoe, and described ejector block passes through the 4th spring fitting on die shoe, can move in the fixing upper-lower height in punching and blanking die inside, the top co-altitude of described punching and blanking die, ejector block, active bending punch under free state;

Be provided with bottom described elastic stripper and can press down ejector block, make the depression bar that ejector block moves down in punching and blanking die inside, described blanking bending punch-die can stretch in punching and blanking die downwards, the mobile route of ejector block moves, described first spring, second spring, 3rd spring, the elastic modelling quantity of the 4th spring arranges satisfied: in upper bolster folding process, ejector block is moved downward to die shoe top, the bottommost of blanking bending punch-die and patrix binder block in this process, co-altitude bottom elastic stripper, punching and blanking die, the top co-altitude of active bending punch, upper bolster continues in folding process, punching and blanking die and elastic stripper are fitted, first spring starts compression, blanking bending punch-die and patrix binder block continue synchronously to press down, after active bending punch moves to die shoe top, second spring starts compression.

2. a kind of compound punching structure for punch level progressive die according to claim 1, it is characterized in that, the thrust of described first spring is greater than the top power of third and fourth spring, the thrust of the second spring is greater than the top power of the 3rd spring, and described upper mould fixed plate is arranged on bottom upper bolster by upper die plate.

3. a kind of compound punching structure for punch level progressive die according to claim 1, it is characterized in that, described punching and blanking die is arranged on die shoe top by counterdie backing plate.

4. a kind of compound punching structure for punch level progressive die according to claim 1, it is characterized in that, described elastic stripper top is fixed with spring-loaded stripping backboard, its top is connected with bottom upper mould fixed plate by the first spring, depression bar is arranged on bottom spring-loaded stripping backboard, elastic stripper has the through hole passed for depression bar.

5. a kind of compound punching structure for punch level progressive die according to claim 1, it is characterized in that, be provided with the guide pillar driving upper bolster movement between surrounding and die shoe top correspondence position bottom described upper bolster, guide pillar outer setting has guide pin bushing.

6. a kind of compound punching structure for punch level progressive die according to claim 2, it is characterized in that, described second spring fitting place is positioned at upper bolster inside and is communicated with upper bolster top, and the space between the second spring and upper bolster outside is provided with the first plug screw.

7. a kind of compound punching structure for punch level progressive die according to claim 3, it is characterized in that, described 3rd spring fitting place is positioned at die shoe inside and is communicated with bottom die shoe, and the space between the 3rd spring and die shoe outside is provided with the second plug screw.

8. a kind of compound punching structure for punch level progressive die according to claim 6, it is characterized in that, described patrix binder block is located through the second spring center by the first locating shaft, binder block pushing block is provided with, itself and upper die plate internal engagement between patrix binder block top and the second spring bottom.

9. a kind of compound punching structure for punch level progressive die according to claim 7, it is characterized in that, described active bending punch is located through the 3rd spring center by the second locating shaft, bending punch pushing block is provided with, itself and counterdie backing plate internal engagement between active bending male bottom and the 3rd spring top.

10. a kind of compound punching structure for punch level progressive die according to claim 1, is characterized in that, described compound punching device punching part formed thereby is the part that the right and left needs bending forming.