Stamping equipment for complex shape forming and machining method of stamping equipment

Abstract

The invention provides stamping equipment for complex shape forming and a machining method of the stamping equipment, and belongs to the technical field of stamping part machining. The two sliding die heads capable of sliding and the pressure rising block located between the two sliding die heads are arranged on the upper die base, meanwhile, the containing grooves used for containing the pressure rising block are formed in the lower portions of the opposite sides of the two sliding die heads, and the receding hole communicated with the main die cavity and provided with the side punching head is formed in the lower die base. A secondary die cavity corresponding to the receding hole is formed in the sliding die head, the sliding die head is pushed by the expansion pressing block to abut against the sliding die head, then the expansion pressing block and the main die cavity are matched for stamping machining to obtain a U-shaped middle product, and then the side stamping head is matched with the secondary die cavity for stamping machining on the middle product to obtain an annular protruding edge. And then the expansion pressing block moves into the containing groove to achieve closing and retracting of the two sliding die heads, demolding and discharging are facilitated, one-time machining of products in complex shapes is achieved, and the problems that due to multiple times of transferring and feeding and discharging, the machining efficiency and product precision are low, and the use performance is poor are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping part processing, and particularly to a stamping device for complex shape forming and a processing method thereof. Background Art

[0002] As a device often used in parts processing, a stamping device includes a stamping machine and a stamping die, that is, the stamping die is installed on the stamping machine, and the stamping processing of parts is realized through the closing and opening of the stamping die.

[0003] Currently, the existing stamping devices on the market usually have a single-direction main shaft structure, and the stamping die can usually only move in one direction, which is suitable for the stamping processing of some products with simple structures. However, for some products that require multi-direction forming, Figure 1 is a complex shape product to be processed by the present invention. As shown in Figure 1 , the product itself has a structure with a "U"-shaped cross-section, and a number of annular convex edges protruding towards the inside are provided on its two side walls. Moreover, there are steel stamps on the inner walls of the convex edges to mark the inner diameter dimensions of each annular convex edge. If the above complex shape product is processed by the existing stamping devices currently on the market, it is necessary to punch holes in a flat steel plate and make an induction on the hole edges, and then use a concave-convex stamping die to stamp the flat steel plate to bend it into a "U"-shaped structure. After changing the direction, another stamping die is used to expand the holes on it, and the mouth edge of the opening is turned over towards the inside through the stamping die to form an annular convex edge protruding towards the inside on its inner wall. In addition, since there are annular convex edges on both sides of the product, after the processing is completed by the traditional fixed die, the formed annular convex edges will get stuck in the stamping die and it is difficult to demold. Therefore, the annular convex edges on both sides need to be processed separately, that is, first process the annular convex edge on one side, and after the processing is completed and demolded, it is placed in another stamping die for the stamping processing of the annular convex edge on the other side. Not only is the operation process cumbersome, with frequent loading and unloading, the processing efficiency is low, but also the frequent loading and unloading operation is prone to cause deviation of the processing reference, resulting in a decrease in product accuracy and affecting the use performance of the product. Summary of the Invention

[0004] Aiming at the above problems existing in the prior art, the present invention aims to provide a stamping device for complex shape forming and a processing method thereof, by setting a sliding stamping die and configuring a side stamping head. The "U"-shaped processing is realized through the outward expansion of the pressing head of the sliding stamping die, then the processing of the annular convex edge is realized through the side stamping head, and finally the annular convex edge is disengaged through the inward contraction of the pressing head of the sliding stamping die, so as to facilitate the demolding of the product, achieve the one-time forming of complex shape products on the same device, without intermediate transfer and frequent loading and unloading operations, improve the processing efficiency, and ensure the product accuracy and use performance.

[0005] The specific technical solution is as follows: A stamping device for forming complex shapes, including a stamping machine and a stamping die. The stamping die is installed on the stamping machine and has the following characteristics: The stamping machine includes a frame, a main drive shaft, a secondary drive shaft, and a lateral drive shaft. The frame is provided with a workbench. The main drive shaft and the secondary drive shaft are both vertically downwardly installed on the frame and are both located above the workbench. The lateral drive shaft is horizontally installed on the frame and is also located above both sides of the workbench. The stamping die includes an upper die base, sliding die heads, pressure boosting blocks, demolding springs, and a lower die base. The upper die base and the lower die base are respectively installed on the main drive shaft and the workbench. Two sliding die heads are slidably arranged on the bottom surface of the upper die base, and the two sliding die heads approach or move away from each other horizontally. Demolding springs are arranged between the mutually facing sides of the two sliding die heads and the upper die base. The pressure boosting blocks are arranged between the two sliding die heads and are connected to the secondary drive shaft. Accommodating grooves are respectively opened at the lower parts of the mutually approaching sides of the two sliding die heads. A main die cavity is opened on the top surface of the lower die base. At the same time, a secondary die cavity is horizontally opened on each sliding die head and on the side facing away from the other sliding die head. And relief holes communicating with the main die cavity are opened on both sides of the lower die base. And when the sliding die heads are located in the main die cavity and move in place, the relief holes are aligned with the secondary die cavities. And a side stamping head is installed on the lateral drive shaft, and the side stamping head extends into the relief holes.

[0006] In the above stamping device for forming complex shapes, a through hole is opened on the upper die base, and the secondary drive shaft passes through the upper die base and is connected to the pressure boosting block.

[0007] In the above stamping device for forming complex shapes, a plurality of horizontally arranged and mutually spaced parallel sliding grooves are opened on the bottom surface of the upper die base. A plurality of sliding blocks corresponding to the sliding grooves one by one are arranged on the top surface of each sliding die head. And a blocking block is arranged at one end of each sliding groove and on the outer side of the upper die base. The two ends of the demolding spring respectively abut against the sliding die head and the blocking block.

[0008] In the above stamping device for forming complex shapes, it further includes a steel stamping component. The steel stamping component includes a steel stamping head, a guide rod, and a steel stamping driver. The steel stamping head is arranged in the relief hole and is connected to the guide rod on the side facing away from the sliding die head. A guide hole and a steel stamping accommodating hole are opened in the side stamping head. The steel stamping driver is installed on the frame. The guide rod is slidably arranged in the guide hole and is connected to the drive shaft of the steel stamping driver. The steel stamping head is selectively embedded into the steel stamping accommodating hole.

[0009] The above-mentioned stamping equipment for forming complex shapes further includes a convex edge processing component, which includes an inner sliding head, a limit switch, and an inner sliding spring. The inner sliding head is slidably arranged in a secondary mold cavity on the sliding die head. The secondary mold cavity penetrates the sliding die head where it is located. The limit switch is installed in the upper die base. The limit switch includes a trigger end and a limit end. The trigger end extends into the avoidance hole, and the limit end extends into the sliding die head to limit the inner sliding head. The inner sliding spring is arranged between the sliding die head and the inner sliding head.

[0010] The above-mentioned stamping equipment for forming complex shapes, wherein, on the inner wall of the secondary mold cavity, a first sliding groove and a second sliding groove are arranged horizontally. On the outer side wall of the inner sliding head, an upper limit block and a lower abutting block are respectively arranged and extend into the first sliding groove and the second sliding groove. In the upper part of the sliding die head, a first telescopic hole communicating with the first sliding groove is opened. The limit end passes through the first telescopic hole and then extends into the first sliding groove to limit the upper limit block. The inner sliding spring is arranged in the second sliding groove and one end abuts against the lower abutting block. The inner sliding spring applies a force to the inner sliding head to slide towards the inner side of the secondary mold cavity.

[0011] The above-mentioned stamping equipment for forming complex shapes, wherein the limit switch further includes a telescopic sleeve and a downward pressure spring. In the upper die base, a telescopic channel is arranged horizontally. At both ends of the telescopic channel, a communicating channel and an activity channel are respectively arranged vertically. The communicating channel communicates with the avoidance hole, and the activity channel communicates with the first telescopic hole. The telescopic sleeve is arranged in the telescopic channel and can telescopically move horizontally. One end of the telescopic sleeve is connected to the trigger end, and the other end is connected to the limit end. The trigger end extends from the communicating channel into the avoidance hole, and the limit end extends from the activity channel and the first telescopic hole into the first sliding groove. Moreover, the height of the telescopic channel is greater than the cross-sectional height of the telescopic sleeve, and the width of the activity channel is greater than the width of the limit end. And, in the upper part of the upper die base, a pre-tightening hole communicating with the inside of the telescopic channel is opened. The downward pressure spring is installed in the pre-tightening hole and its lower end presses against the telescopic sleeve.

[0012] The above-mentioned stamping equipment for forming complex shapes, wherein, on both side edges at the upper end of the pressure increasing block, avoidance inclined surfaces are arranged. At the same time, on the edge at the lower end of the inner sliding head located inside the sliding die head, a matching inclined surface is arranged. And when the inner sliding head slides towards the inner side of the secondary mold cavity, the height of the avoidance inclined surface is lower than that of the matching inclined surface.

[0013] A processing method for a stamping equipment for forming complex shapes includes the following steps: Step S1, press down the upper die base; Place the raw material flat plate with an opening on the main mold cavity of the lower die base. Drive the upper die base to move downward through the main drive shaft, so that the sliding die head enters the main mold cavity to form a "U"-shaped intermediate product. Step S2, stamp; Start the steel stamping component. The drive shaft of the steel stamping driver pushes the steel stamping head towards the sliding die head through the guide rod, and stamps a steel stamp on the outer wall of the intermediate product and at the orifice of the opening. Step S3, convex edge machining; Start the auxiliary drive shaft and drive the pressure increasing block to move downward, so that the height of the avoidance inclined plane is lower than that of the mating inclined plane, and the pressure increasing block does not completely enter the receiving groove. Then start the lateral drive shaft to extend into the avoidance hole and push the trigger end upward through the side punching head. At the same time, drive the limit end upward through the telescopic sleeve so that the limit end is separated from the upper limit block. The inner sliding spring pushes the inner sliding head to slide towards the inside of the secondary die cavity, exposing the orifice of the secondary die cavity. Continue to start the lateral drive shaft so that the side punching head extends into the orifice of the secondary die cavity, and squeeze the orifice of the opening into the orifice of the secondary die cavity to form an annular convex edge to obtain the finished product. Then retract the lateral drive shaft to reset. Step S4, demolding; Continue to start the auxiliary drive shaft to drive the pressure increasing block to move downward, so that the pressure increasing block moves to the receiving groove. Push the two sliding die heads to approach each other through the demolding spring. Then synchronously retract the main drive shaft and the auxiliary drive shaft, so that the upper die base, the sliding die heads and the pressure increasing block move upward synchronously, and then perform finished product blanking. Step S5, die reset; Continue to start the auxiliary drive shaft to drive the pressure increasing block to move upward in the reverse direction until the height of the avoidance inclined plane is higher than that of the mating inclined plane, so that the pressure increasing block disengages from the receiving groove and successively pushes the two sliding die heads to move towards the opposite sides and pushes the inner sliding head to slide towards the outside of the secondary die cavity, and the upper limit block is restricted after passing over the limit end, waiting for the next processing.

[0014] The positive effects of the above technical solutions are: The above stamping equipment for forming complex shapes and its processing method are provided with two slidable sliding die heads on the upper die base, and a pressure increasing block is arranged between the two sliding die heads. The upper die base is connected with a main drive shaft, and the pressure increasing block is connected with an auxiliary drive shaft. A receiving groove is opened at the lower part of the opposite side of the two sliding die heads. At the same time, a main die cavity and an avoidance hole horizontally arranged and communicating with the main die cavity are arranged in the lower die base. A side punching head is arranged in the avoidance hole and is connected with the lateral drive shaft. A secondary die cavity corresponding to the avoidance hole is also opened on the side wall of the sliding die head. The sliding die heads can be pushed outwards by the downward movement of the pressure increasing block. The "U"-shaped intermediate product can be obtained by stamping and processing in cooperation with the main die cavity through the expanded sliding die heads. Then, an annular convex edge is obtained by stamping and processing on the intermediate product through the side punching head. Then continue to move the pressure increasing block downward into the receiving groove, so that the sliding die heads automatically approach and retract under the action of the demolding spring. Then move the upper die base upward as a whole to realize demolding and blanking. Finally, move the pressure increasing block upward to reset and wait for the next stamping processing, realizing the one-time processing of complex-shaped products without transfer, with higher processing efficiency, and also ensuring the product accuracy and service performance. Description of the Drawings

[0015] Figure 1 is the product with a complex shape to be processed in the present invention; Figure 2 is the structural diagram of an embodiment of a stamping device for forming a complex shape in the present invention; Figure 3 is a partial cross-sectional view when the stamping device for forming a complex shape in the present invention processes an intermediate product in a "U" shape and stamps a steel seal; Figure 4 is a partial cross-sectional view when the stamping device for forming a complex shape in the present invention processes an annular convex edge; Figure 5 is a partial cross-sectional view when the stamping device for forming a complex shape in the present invention ejects the mold.

[0016] In the drawings: 1. Stamping die; 11. Upper die base; 12. Sliding die head; 13. Pressurizing block; 14. Demolding spring; 15. Lower die base; 111. Perforation; 112. Slide groove; 113. Plug block; 114. Telescopic channel; 115. Connecting channel; 116. Activity channel; 117. Pre-tightening hole; 121. Accommodating groove; 122. Secondary mold cavity; 123. First sliding groove; 124. Second sliding groove; 125. First telescopic hole; 131. Avoidance inclined plane; 151. Main mold cavity; 152. Avoidance hole; 2. Auxiliary drive shaft; 3. Side stamping head; 31. Steel seal accommodating hole; 4. Steel seal stamping assembly; 41. Steel seal head; 42. Guide rod; 5. Convex edge processing assembly; 51. Inner sliding head; 52. Limit switch; 53. Inner sliding spring; 511. Upper limit block; 512. Lower abutting block; 513. Matching inclined plane; 521. Trigger end; 522. Limit end; 523. Telescopic sleeve; 524. Pressing spring; 6. Annular convex edge. Detailed implementation manners

[0017] In order to make the technical means, creative features, achieved purposes and functions realized by the present invention easy to understand, the following embodiments are combined with the attached Figure 1 to Figure 5 to specifically elaborate on the technical solutions provided by the present invention, but the following content is not a limitation of the present invention.

[0018] Figure 2 is the structural diagram of an embodiment of a stamping device for forming a complex shape in the present invention; Figure 3 is a partial cross-sectional view when the stamping device for forming a complex shape in the present invention processes an intermediate product in a "U" shape and stamps a steel seal. As Figure 2 and Figure 3As shown, the stamping equipment for forming complex shapes and its processing method provided in this embodiment include: a stamping machine and a stamping die 1. The stamping die 1 is installed on the stamping machine, and the driving shafts of the stamping machine drive the stamping die 1 to act, realizing the one-time processing of products with complex shapes, improving the processing efficiency, avoiding the problems of low processing accuracy easily caused by multiple transfers and loading / unloading, and ensuring the product accuracy and service performance.

[0019] Specifically, the stamping machine includes a frame, a main driving shaft, a secondary driving shaft 2, and a lateral driving shaft. At this time, the frame is placed on a horizontal ground, and a working table is provided on the frame to facilitate the placement of the stamping die 1. Moreover, the main driving shaft and the secondary driving shaft 2 are both vertically downward installed on the frame and are both located above the working table, so that the movement directions of the main driving shaft and the secondary driving shaft 2 are the same, providing conditions for their subsequent independent operation and synchronous operation. In addition, the lateral driving shaft is installed on the frame in the horizontal direction and is also located above both sides of the working table, so that the lateral driving shaft can perform stamping processing from both sides of the stamping die 1, providing conditions for realizing the one-time processing of complex shapes.

[0020] More specifically, the stamping die 1 installed on the workbench includes an upper die base 11, a sliding die head 12, an expansion block 13, a demoulding spring 14 and a lower die base 15. During installation, the upper die base 11 and the lower die base 15 are respectively installed on the main drive shaft and the workbench, that is, the upper die base 11 is driven up and down by the main drive shaft to realize the mold separation and mold closing operations of the upper die base 11 and the lower die base 15. At this time, two sliding die heads 12 are slidably arranged on the bottom surface of the upper die base 11, and the two sliding die heads 12 are close to or away from each other in the horizontal direction, so that the two sliding die heads 12 can achieve the reduction or increase of the overall width by sliding, which provides conditions for reducing the overall width of the sliding die head 12 to facilitate demoulding when demoulding is required later. In addition, demolding springs 14 are provided between the side of the two sliding dies 12 facing away from each other and the upper die base 11, that is, in the absence of external force, the two sliding dies 12 can automatically move together under the action of the demolding springs 14 to achieve automatic reduction of the overall width, which provides conditions for the overall width of the two sliding dies 12 to automatically reduce after the subsequent expansion block 13 moves down to the lowermost end to facilitate demolding. In addition, the expansion block 13 is arranged between the two sliding dies 12 and connected to the auxiliary driving shaft 2. At the same time, a receiving groove 121 is opened at the lower part of the side where the two sliding dies 12 are close to each other, so that the auxiliary driving shaft 2 can drive the expansion block 13 to move up and down. When the expansion block 13 has not moved down to enter the receiving groove 121, the expansion block 13 pushes the two sliding dies 12 in the direction away from each other, so that the overall width of the sliding die 12 is maximized. At this time, it is used to cooperate with the lower die seat 15 for stamping processing to obtain a "U"-shaped intermediate product. After the subsequent processing is completed, the expansion block 13 is controlled to move to the receiving groove 121, so that the sliding die heads 12 are close to each other under the action of the demoulding spring 14. The expansion block 13 enters the receiving groove 121 to adapt to the mutual approach of the sliding die heads 12, so that the overall width of the sliding die head 12 is smaller than the minimum width of the inner wall of the product, thereby facilitating the demoulding and unloading of the product. In addition, a main mold cavity 151 is provided on the top surface of the lower mold base 15 , and a U-shaped intermediate product is obtained by punching in cooperation with the sliding die head 12 . At the same time, a secondary mold cavity 122 is opened in the horizontal direction on each sliding die head 12 and located on the side away from the other sliding die head 12, and a recessed portion is formed on the side of the sliding die head 12 through the secondary mold cavity 122, and avoidance holes 152 connected to the main mold cavity 151 are opened on both sides of the lower mold base 15, and when the sliding die head 12 is located in the main mold cavity 151 and moves into place, the avoidance holes 152 are opposite to the secondary mold cavity 122, and at the same time, a side punch head 3 is installed on the lateral drive shaft, and the side punch head 3 extends into the avoidance hole 152, so that after the "U"-shaped intermediate product is punched out, the side punch head 3 continues to be driven by the lateral drive shaft to move toward the secondary mold cavity 122, and the opening of the "U"-shaped intermediate product is squeezed toward the secondary mold cavity 122 by the side punch head 3 to form an annular convex edge 6, thereby realizing one-time processing of products with complex shapes.It should be noted that after the annular convex edge 6 is processed, the side stamping head 3 retracts and resets. At this time, the pressure boosting block 13 is controlled to move down to the corresponding position of the receiving groove 121, so that the sliding die head 12 closes to narrow the overall width, so that the formed annular convex edge 6 is disengaged from the corresponding secondary die cavity 122, thus facilitating demolding.

[0021] More specifically, a through hole 111 is also formed in the upper die base 11. At this time, the auxiliary drive shaft 2 passes through the upper die base 11 and is connected to the pressure boosting block 13, that is, the auxiliary drive shaft 2 can be directly connected to the pressure boosting block 13 through the through hole 111, which facilitates the auxiliary drive shaft 2 to drive the pressure boosting block 13 to move independently of the upper die base 11 or synchronously with the upper die base 11.

[0022] More specifically, a plurality of horizontal and parallel grooves 112 are formed on the bottom surface of the upper die base 11, and the cross section of each groove 112 is arranged in an inverted "T" shape, that is, the groove opening of the groove 112 is located at the bottom and is a constricted structure. At the same time, a plurality of sliders corresponding to the grooves 112 one by one are arranged on the top surface of each sliding die head 12, so that the sliders are also arranged in a "T" shape in cross section, realizing the mutual embedding and sliding connection of the sliders and the grooves 112, ensuring the connection reliability between the two. And a blocking block 113 is arranged at one end of each groove 112 outside the upper die base 11, that is, a blocking structure is formed in the groove 112 by the blocking block 113. And the demolding spring 14 is arranged in the groove 112 and abuts against the sliding die head 12 and the blocking block 113 at both ends respectively, that is, the groove 112 provides an installation space for the demolding spring 14 to realize a hidden installation, and at the same time, the blocking block 113 provides a abutment basis for the demolding spring 14.

[0023] More specifically, the stamping die 1 is also provided with a stamping assembly 4. At this time, the stamping assembly 4 includes a stamp head 41, a guide rod 42 and a stamping driver. During installation, the stamp head 41 is arranged in the avoidance hole 152 and is connected to the guide rod 42 on the side away from the sliding die head 12, so that the stamp head 41 can move toward the sliding die head 12 under the action of the guide rod 42, thereby stamping the steel stamp at the opening of the outer wall of the "U"-shaped intermediate product between the inner wall of the main die cavity 151 of the sliding die head 12 and the lower die seat 15. In addition, a guide hole and a stamp accommodating hole 31 are provided in the side punching head 3. During installation, the stamping driver is installed on the frame, and the guide rod 42 is slidably arranged in the guide hole and connected to the driving shaft of the stamping driver, so that the stamping driver can drive the stamp head 41 to move through the guide rod 42. In addition, when in use, the stamp head 41 is selectively embedded in the stamp accommodating hole 31, that is, when stamping, the stamp head 41 is located outside the stamp accommodating hole 31. At this time, the side punch head 3 does not move, and only the guide rod 42 drives the stamp head 41 to move to realize the stamping operation. When the annular convex edge 6 needs to be stamped, the side punch head 3 continues to be driven to move by the lateral driving shaft, so that the stamp head 41 is embedded in the stamp accommodating hole 31, ensuring that the end of the side punch head 3 is flat, ensuring smooth stamping of the annular convex edge 6.

[0024] Figure 4 This is a partial cross-sectional view of a complex shape forming punching device of the present invention when processing an annular convex edge. Figure 2 , Figure 3 as well as Figure 4As shown, a convex edge processing component 5 is further provided on the stamping die 1 for stamping and processing an inwardly protruding annular convex edge 6 at the orifice of the opening of the "U"-shaped intermediate product. At this time, the convex edge processing component 5 further includes an inner slider 51, a limit switch 52, and an inner sliding spring 53. During installation, the inner slider 51 is slidably disposed in the secondary die cavity 122 on the sliding die head 12, so that the inner slider 51 can move within the secondary die cavity 122. Thus, the inner slider 51 can fill the orifice of the secondary die cavity 122 during the steel stamping process, providing rear support for the steel stamping operation to ensure smooth steel stamping. When forming the annular convex edge 6, the orifice of the secondary die cavity 122 can be released by moving, and the stamping processing of the annular convex edge 6 can be smoothly realized. In addition, the secondary die cavity 122 penetrates the sliding die head 12 where it is located. The limit switch 52 is installed in the upper die base 11. And the limit switch 52 includes a trigger end 521 and a limit end 522. During installation, the trigger end 521 is extended into the avoidance hole 152, so that when the side stamping head 3 moves in the avoidance hole 152, the trigger end 521 can be triggered to unlock the limit switch 52. At the same time, the limit end 522 is extended into the sliding die head 12 to restrict the inner slider 51, so that after the trigger end 521 is triggered, the limit end 522 loses the restriction on the inner slider 51. At the same time, the inner sliding spring 53 is disposed between the sliding die head 12 and the inner slider 51, so that the inner slider 51 automatically slides towards the inner side of the secondary die cavity 122 under the action of the inner sliding spring 53, exposing the orifice of the secondary die cavity 122, thereby facilitating the side stamping head 3 to extrude the orifice of the opening of the "U"-shaped intermediate product into the orifice of the secondary die cavity 122 to form the annular convex edge 6.

[0025] More specifically, a first sliding groove 123 and a second sliding groove 124 arranged in the horizontal direction are further formed on the inner wall of the secondary mold cavity 122. At the same time, an upper limit block 511 and a lower abutting block 512 respectively extending into the first sliding groove 123 and the second sliding groove 124 are provided on the outer side wall of the inner sliding head 51, so that the upper limit block 511 and the lower abutting block 512 can move in the first sliding groove 123 and the second sliding groove 124 respectively when the inner sliding head 51 moves. And, a first telescopic hole 125 communicating with the first sliding groove 123 is formed in the upper part of the sliding die head 12. At this time, the limiting end 522 of the limit switch 52 passes through the first telescopic hole 125 and then extends into the first sliding groove 123 to limit the upper limit block 511, that is, the first telescopic hole 125 provides a condition for the cooperation between the limiting end 522 of the limit switch 52 and the upper limit block 511. In addition, the inner sliding spring 53 is arranged in the second sliding groove 124 and one end thereof abuts against the lower abutting block 512. And, the inner sliding spring 53 applies a force to the inner sliding head 51 to slide towards the inside of the secondary mold cavity 122, that is, after the limiting end 522 releases the limiting effect on the upper limit block 511, the inner sliding spring 53 drives the inner sliding head 51 to retract towards the inside of the secondary mold cavity 122 to expose the cavity opening of the secondary mold cavity 122, which is convenient for realizing the stamping process of the annular convex edge 6.

[0026] More specifically, the limit switch 52 further includes a telescopic sleeve 523 and a downward pressing spring 524. At this time, a telescopic channel 114 arranged in the horizontal direction is formed in the upper die base 11, so that the arrangement direction of the telescopic channel 114 is the same as the moving direction of the sliding die head 12. At the same time, a communicating channel 115 and a movable channel 116 arranged in the vertical direction are respectively provided at both ends of the telescopic channel 114. Moreover, the communicating channel 115 is communicated with the avoidance hole 152, and the movable channel 116 is communicated with the first telescopic hole 125, providing conditions for the limit switch 52 to cooperate with the side punching head 3 and the upper limit block 511. In addition, the telescopic sleeve 523 is arranged in the telescopic channel 114 and telescopic in the horizontal direction. At the same time, one end of the telescopic sleeve 523 is connected to the trigger end 521, and the other end is connected to the limit end 522. That is, the distance between the trigger end 521 and the limit end 522 is adjusted by the telescopic movement of the telescopic sleeve 523, thus meeting the use requirement of the sliding die head 12 for position adjustment. And, the trigger end 521 extends from the communicating channel 115 into the avoidance hole 152, providing conditions for the trigger end 521 to cooperate with the side punching head 3 extending into the avoidance hole 152 to achieve trigger unlocking. At the same time, the limit end 522 extends from the movable channel 116 and the first telescopic hole 125 into the first sliding groove 123, so that the limit end 522 can move following the trigger end 521. After the trigger end 521 is triggered and unlocked, the limit end 522 can also be separated from the upper limit block 511 to unlock the inner slider 51. And, the height of the telescopic channel 114 is greater than the cross-sectional height of the telescopic sleeve 523, and the width of the movable channel 116 is greater than the width of the limit end 522. When the trigger end 521 is triggered and unlocked by the side punching head 3, the side punching head 3 can push the trigger end 521 upward, so that the trigger end 521, the telescopic sleeve 523 and the limit end 522 all move upward. The telescopic channel 114 provides an avoidance space to ensure the smooth upward movement. At the same time, when the sliding die head 12 needs to move closer and retract during demoulding, the movable channel 116 can provide an avoidance space for the movement of the limit end 522 to ensure the smooth movement of the sliding die head 12. And, a pre-tightening hole 117 communicating with the inside of the telescopic channel 114 is formed in the upper part of the upper die base 11. At the same time, the downward pressing spring 524 is installed in the pre-tightening hole 117 and its lower end presses against the telescopic sleeve 523. That is, when the limit switch 52 needs to be reset after being triggered, the trigger end 521, the telescopic sleeve 523 and the limit end 522 can be pushed downward by the downward pressing spring 524, so as to realize the reset of the limit switch 52.

[0027] Figure 5 Partial cross-sectional view during demoulding of a stamping device for forming complex shapes according to the present invention. As Figures 2 to 5As shown in the figure, relief inclined surfaces 131 are provided on both side edges at the upper end of the pressure boosting block 13. At the same time, a mating inclined surface 513 is provided on the edge at the lower end of the inner slider 51 at the end located inside the sliding die head 12. That is, when the inner slider 51 needs to seal the cavity opening of the secondary die cavity 122, the relief inclined surface 131 is located above the mating inclined surface 513, and the non-relief inclined surface 131 of the pressure boosting block 13 abuts against the sliding die head 12 and the inner slider 51 at the same time. When the cavity opening of the secondary die cavity 122 needs to be exposed, the pressure boosting block 13 moves downward. When the inner slider 51 slides toward the inside of the secondary die cavity 122, the height of the relief inclined surface 131 is lower than that of the mating inclined surface 513. The cooperation between the relief inclined surface 131 and the mating inclined surface 513 provides space for the inner slider 51 to retract inward. Moreover, when the subsequent mold is fully reset, the relief inclined surface 131 can apply a thrust to the mating inclined surface 513 by the upward movement of the pressure boosting block 13, thereby pushing the inner slider 51 to reset, so that the limiting end 522 can catch the upper limiting block 511 of the inner slider 51, realizing the complete reset of the inner slider 51.

[0028] In addition, this embodiment also provides a processing method for a stamping device for forming complex shapes. Using the above-mentioned stamping device for forming complex shapes, a product with a complex shape as shown in the appendix Figure 1 is processed, which specifically includes the following steps: Step S1, press down the upper die base 11; Place the raw material flat plate with holes obtained after pre-punching on the main die cavity 151 of the lower die base 15 to complete the feeding operation. Then start the main drive shaft to press down, drive the upper die base 11 to move downward through the main drive shaft, so that the sliding die head 12 enters the main die cavity 151, and squeeze the raw material flat plate with holes into the main die cavity 151 through the sliding die head 12 to form a "U"-shaped intermediate product.

[0029] Step S2, stamp; After forming the "U"-shaped intermediate product in step S1, the steel stamping assembly 4 is immediately started. Since when the raw material flat plate with openings is extruded into the main die cavity 151 through the sliding die head 12, the outer wall of the raw material flat plate with openings will directly squeeze and rub against the cavity opening and the inner wall of the main die cavity 151. Therefore, the operation of stamping the steel stamp on the product cannot be completed before stamping. Therefore, it needs to be realized during stamping. At this time, it is more reasonable to perform the steel stamping operation after forming the "U"-shaped intermediate product. In addition, when forming the annular convex edge 6 by stamping with the side stamping head 3 subsequently, in order to facilitate the side stamping head 3 to quickly and smoothly enter the secondary die cavity 122, the end of the side stamping head 3 is arranged in a frustum shape, thereby reducing the extrusion force on the orifice of the opening on the outer side wall of the intermediate product during stamping, thus avoiding damage to the steel stamp at this place and ensuring that the steel stamp can be retained subsequently. And, after starting the steel stamping operation, the drive shaft of the steel stamping driver pushes the steel stamp head 41 to move towards the sliding die head 12 through the guide rod 42, and the steel stamp head 41 contacts and squeezes the material at the opening of the outer side wall of the intermediate product, and stamps the steel stamp on the outer side wall of the intermediate product and at the orifice of the opening, completing the steel stamping operation.

[0030] Step S3, convex edge machining; After completing the steel stamping operation in step S2, the auxiliary drive shaft 2 is immediately started and drives the pressure boosting block 13 to move downward, so that the height of the avoidance inclined surface 131 on the pressure boosting block 13 is lower than the height of the mating inclined surface 513 on the inner sliding head 51. At this time, when the pressure boosting block 13 has not completely entered the receiving groove 121, the pressure boosting block 13 can still push and support the two sliding die heads 12 but cannot support the inner sliding head 51. When the lateral drive shaft is started again and extends into the avoidance hole 152, the side stamping head 3 on the lateral drive shaft can push the trigger end 521 of the limit switch 52 to move upward. The trigger end 521 drives the limit end 522 to move upward simultaneously through the telescopic sleeve 523, so that the limit end 522 is separated from the upper limit block 511, and the limit end 522 loses the restriction on the upper limit block 511. Thus, the inner sliding spring 53 pushes the inner sliding head 51 to slide inwardly towards the secondary die cavity 122, realizing the retraction of the inner sliding head 51, thereby exposing the cavity opening of the secondary die cavity 122 and providing a stamping space for forming the annular convex edge 6. And, the lateral drive shaft is started again to make the side stamping head 3 extend into the cavity opening of the secondary die cavity 122, and the orifice of the opening is squeezed into the cavity opening of the secondary die cavity 122 to form the annular convex edge 6, obtaining the finished product, realizing the stamping processing of the product, and starting the lateral drive shaft to move reversely after the processing is completed, realizing the retraction and reset of the side stamping head 3 driven by the lateral drive shaft. It should be noted that when the side stamping head 3 is stamping and retracting and resetting, the drive shaft of the steel stamping driver will move synchronously, so that the steel stamp head 41 and the side stamping head 3 can move as a whole, avoiding interference problems.

[0031] Step S4, demoulding; After the stamping process is completed and demolding is required, the auxiliary drive shaft 2 needs to be started to press down continuously, driving the pressure increasing block 13 to move downward, so that the pressure increasing block 13 moves to the receiving groove 121 of the sliding die head 12, and the pressure increasing block 13 no longer pushes against the sliding die head 12. At this time, the sliding die head 12 is only affected by the demolding spring 14, that is, the two sliding die heads 12 are pushed closer to each other by the demolding spring 14, reducing the overall width of the two sliding die heads 12, so that the annular convex edge 6 formed by stamping can be removed from the secondary die cavity 122, and the product is no longer restricted by the sliding die head 12 and the main die cavity 151. At this time, the main drive shaft and the auxiliary drive shaft 2 are retracted synchronously, so that the upper die holder 11, the sliding die head 12 and the pressure increasing block 13 move upward synchronously, ensuring that the main die cavity 151 is completely exposed, and then the finished product is blanked, making the operation more convenient.

[0032] Step S5, mold reset; After blanking is completed, the auxiliary drive shaft 2 needs to be started to drive the pressure increasing block 13 to move upward in the reverse direction so that the height of the avoiding inclined surface 131 of the pressure increasing block 13 is higher than the matching inclined surface 513, so that the pressure increasing block 13 can be removed from the receiving groove 121 and first push the two sliding die heads 12 to move toward the opposite sides, and the overall width of the two sliding die heads 12 is restored to the initial state to meet the processing requirements of the intermediate product. Then, the pressure increasing block 13 is continuously moved upward so that the avoiding inclined surface 131 of the pressure increasing block 13 can push the matching inclined surface 513 of the inner sliding head 51, thereby pushing the inner sliding head 51 to slide toward the outside of the secondary die cavity 122, so that the inner sliding head 51 serves as the rear support structure during the steel stamping process to meet the requirements of subsequent steel stamping operations. In addition, when the inner sliding head 51 is reset, the upper limit block 511 on the inner sliding head 51 will synchronously cross the limit end 522 of the limit switch 52 and then be restricted by the limit end 522 again, realizing the temporary limit of the inner sliding head 51 and achieving the complete reset of the stamping die 1, waiting for the next processing.

[0033] The stamping equipment for forming complex shapes and its processing method provided in this embodiment include a stamping machine and a stamping die 1; by arranging two slidable sliding die heads 12 on the upper die base 11, arranging a boosting block 13 between the two sliding die heads 12, and connecting the upper die base 11 and the boosting block 13 to the main drive shaft and the auxiliary drive shaft 2 respectively. At the same time, accommodation grooves 121 for accommodating the boosting block 13 are formed at the lower parts of the opposite sides of the two sliding die heads 12. At the same time, an avoidance hole 152 communicating with the main die cavity 151 is formed on the lower die base 15. A side stamping head 3 is arranged in the avoidance hole 152, and a secondary die cavity 122 corresponding to the avoidance hole 152 is arranged on the sliding die head 12. After the boosting block 13 pushes against the sliding die head 12, it cooperates with the main die cavity 151 to stamp and process a "U"-shaped intermediate product. Then, the side stamping head 3 cooperates with the secondary die cavity 122 to stamp and process an annular convex edge 6 on the intermediate product. Then, by moving the boosting block 13 into the accommodation groove 121, the two sliding die heads 12 are made to approach and retract, facilitating demolding and blanking, realizing the one-time processing of complex-shaped products, and avoiding the problems of low processing efficiency, low product precision, and poor service performance caused by multiple transfers and loading and unloading.

[0034] The above are only preferred embodiments of the present invention, and thus do not limit the implementation manners and protection scope of the present invention. For those skilled in the art, it should be able to realize that all equivalent replacements and obvious changes made by using the description and illustration content of the present invention should be included in the protection scope of the present invention.

Claims

1. A punching device for forming a complex shape, comprising a punching machine and a punching die, wherein the punching die is mounted on the punching machine, characterized in that: The punching machine comprises a frame, a main drive shaft, a secondary drive shaft and a lateral drive shaft, the frame is provided with a work station, the main drive shaft and the secondary drive shaft are both vertically mounted downward on the frame and are both located above the work station, the lateral drive shaft is mounted on the frame in a horizontal direction and is also located above both sides of the work station; The stamping die comprises an upper die seat, a sliding die head, an expansion block, a demoulding spring and a lower die seat, wherein the upper die seat and the lower die seat are respectively mounted on the main drive shaft and the work station, two sliding die heads are slidably arranged on the bottom surface of the upper die seat, and the two sliding die heads are moved closer to or away from each other in the horizontal direction, and the demoulding spring is arranged between the side of the two sliding die heads facing away from each other and the upper die seat, the expansion block is arranged between the two sliding die heads and connected to the secondary drive shaft, and the two sliding die heads are mutually A receiving groove is provided at the lower part of the side close to the lower die base, a main die cavity is provided on the top surface of the lower die base, and a secondary die cavity is provided on each of the sliding die heads and on the side away from the other sliding die head in the horizontal direction, and avoidance holes connected to the main die cavity are provided on both sides of the lower die base, and when the sliding die head is located in the main die cavity and moved into place, the avoidance hole is opposite to the secondary die cavity, and a side punch head is installed on the lateral driving shaft, and the side punch head extends into the avoidance hole.

2. The punching equipment for complex shape forming according to claim 1, characterized in that: The upper die seat is provided with a through hole, and the auxiliary driving shaft passes through the upper die seat and is connected with the expansion block.

3. The punching equipment for complex shape forming according to claim 2, characterized in that: A plurality of slide grooves arranged horizontally and spaced parallel to each other are provided on the bottom surface of the upper die base, a plurality of sliding blocks corresponding to the slide grooves are provided on the top surface of each sliding die head, and a blocking block is provided at one end of each slide groove located on the outer side of the upper die base, and the two ends of the demoulding spring respectively abut against the sliding die head and the blocking block.

4. The punching equipment for complex shape forming according to claim 3, characterized in that: It also includes a stamping component, which includes a stamp head, a guide rod and a stamp driver. The stamp head is arranged in the avoidance hole and is connected to the guide rod on the side away from the sliding die head. The side stamping head is provided with a guide hole and a stamp accommodating hole. The stamp driver is installed on the frame. The guide rod is slidably arranged in the guide hole and is connected to the driving shaft of the stamp driver. The stamp head is selectively embedded in the stamp accommodating hole.

5. The punching equipment for complex shape forming according to claim 4, characterized in that: It also includes a convex edge processing component, which includes an inner slider, a limit switch and an inner sliding spring. The inner slider is slidably arranged in the secondary mold cavity on the sliding die head, and the secondary mold cavity passes through the sliding die head. The limit switch is installed in the upper die seat, and the limit switch includes a trigger end and a limit end. The trigger end extends into the avoidance hole, and the limit end extends into the sliding die head and limits the inner slider. The inner sliding spring is arranged between the sliding die head and the inner slider.

6. The punching equipment for complex shape forming according to claim 5, characterized in that: The inner wall of the secondary mold cavity is provided with a first sliding groove and a second sliding groove arranged in a horizontal direction, the outer wall of the inner slider is provided with an upper limit block and a lower abutment block respectively extending into the first sliding groove and the second sliding groove, the upper part of the sliding die head is provided with a first telescopic hole connected to the first sliding groove, the limiting end extends into the first sliding groove after passing through the first telescopic hole and limits the upper limit block, the inner sliding spring is provided in the second sliding groove and one end abuts against the lower abutment block, the inner sliding spring applies a force on the inner slider to slide toward the inner side of the secondary mold cavity.

7. The punching equipment for complex shape forming according to claim 6, characterized in that: The limit switch also includes a telescopic sleeve and a downward pressure spring. A telescopic channel arranged in the horizontal direction is provided in the upper mold base, and a connecting channel and a movable channel arranged in the vertical direction are respectively provided at both ends of the telescopic channel. The connecting channel is connected to the avoidance hole, and the movable channel is connected to the first telescopic hole. The telescopic sleeve is arranged in the telescopic channel and telescopes in the horizontal direction. One end of the telescopic sleeve is connected to the trigger end, and the other end is connected to the limit end. The trigger end extends from the connecting channel to the avoidance hole, and the limit end extends from the movable channel and the first telescopic hole to the first sliding groove. In addition, the height of the telescopic channel is greater than the cross-sectional height of the telescopic sleeve, the width of the movable channel is greater than the width of the limit end, and a pre-tightening hole connected to the telescopic channel is provided on the upper part of the upper mold base. The downward pressure spring is installed in the pre-tightening hole and the lower end is pressed against the telescopic sleeve.

8. The punching equipment for complex shape forming according to claim 7, characterized in that: The edges on both sides of the upper end of the expansion block are provided with avoidance slopes. At the same time, the edges on the lower end of the inner slider located on the inner side of the sliding die head are provided with matching slopes. When the inner slider slides toward the inner side of the secondary mold cavity, the height of the avoidance slope is lower than the matching slope.

9. A method for processing a punching device for complex shape forming, using the punching device for complex shape forming as claimed in claim 8 for processing, comprising the following steps: Step S1, pressing down the upper die base; Placing the raw material plate with the opening on the main mold cavity of the lower mold base, driving the upper mold base downward by the main drive shaft, so that the sliding die head enters the main mold cavity to form a "U"-shaped intermediate product; Step S2, stamping; The steel stamping assembly is started, and the driving shaft of the steel stamping driver pushes the steel stamping head toward the sliding die head through the guide rod to stamp a steel stamp on the outer wall of the intermediate product and at the opening of the opening; Step S3, convex edge processing; The auxiliary driving shaft is started and the pressure block is driven to move downward, so that the height of the avoidance slope is lower than the matching slope, and the pressure block has not completely entered the accommodating groove, and then the lateral driving shaft is started to extend into the avoidance hole and push the trigger end upward through the side punch head, and at the same time, the limit end is driven to move upward through the telescopic sleeve to separate the limit end from the upper limit block, and the inner sliding spring pushes the inner sliding head to slide toward the inner side of the secondary mold cavity to expose the cavity opening of the secondary mold cavity, and the lateral driving shaft is continued to be started to make the side punch head extend into the cavity opening of the secondary mold cavity, and the orifice of the opening is squeezed toward the cavity opening of the secondary mold cavity to form an annular convex edge to obtain a finished product, and then the lateral driving shaft is retracted and reset; Step S4, demoulding; Continue to start the secondary drive shaft to drive the pressure block to move downward, so that the pressure block moves to the receiving groove, and the two sliding die heads are pushed closer to each other through the demoulding spring, and then the main drive shaft and the secondary drive shaft are synchronously retracted, so that the upper die seat, the sliding die head and the pressure block are synchronously moved upward, and then the finished product is unloaded; Step S5, resetting the mold; Continue to start the auxiliary drive shaft in the reverse direction to drive the expansion block to move up to the height of the avoidance slope higher than the matching slope, so that the expansion block escapes from the accommodating groove and pushes the two sliding die heads to move toward the opposite sides in turn and pushes the inner sliding head to slide toward the outer side of the secondary mold cavity, and the upper limit block is restricted after passing the limit end, waiting for the next processing.

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