Progressive die for machining n-shaped pulley shell
Through the coordinated work of crimping, cutting edge and folding edge punching tool, the serious wear of punching tool in the processing of tile pulley shells is solved, and efficient and low-cost mass production and high-precision folding are achieved.
Patent Information
- Application Number
- CN202422345498.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-25
AI Technical Summary
In the prior art, when processing the shell of the trowel, the punching tool is seriously worn, resulting in frequent replacement, affecting production efficiency and cost, and the folding accuracy is not high.
The combination process of the crimping punching knife, the cutting edge punching knife and the folding punching knife is adopted to avoid direct and complex punching, extend the life of the punching knife, and ensure the folding accuracy through the crimping operation.
It extends the service life of the punching tool, reduces the replacement frequency, improves production efficiency and product quality, and reduces production costs and failure rates.
Smart Images
Figure CN223113976U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of continuous moulds, in particular to a continuous mould for processing a 匚-shaped pulley shell. Background Art
[0002] As an advanced mold technology, the continuous mold has many advantages in hardware processing. The continuous mold has high positioning accuracy between each process, which can effectively ensure the size accuracy and shape accuracy of the hardware. At the same time, the continuous mold is used for processing, and only one positioning is required to complete multiple processes in one stamping stroke, which greatly reduces the processing time and the transportation time between processes, thereby significantly improving production efficiency; in addition, the continuous mold has a high degree of automation, which can reduce manual operation, reduce labor intensity and safety risks, and can improve material utilization and reduce production costs.
[0003] However, in order to ensure the strength of the pulley housing, the pulley housing itself needs a certain material thickness, so the mold needs to have a higher strength during the processing. Figure 1 As shown, a pulley housing is slightly bent inward at the edge. This structure can make the edge more rounded and less likely to cut people while improving its strength. However, when processing the edge structure, if a punch is used directly for punching, the area where the punch contacts the edge of the workpiece is small, the length is long, and the workpiece thickness is large. The punching process will cause great damage to the punch, resulting in the need to replace new punches multiple times during mass production, which not only increases costs but also affects production and processing efficiency. Therefore, it is necessary to propose an improved technical solution to solve the above problems. Utility Model Content
[0004] The utility model aims to overcome the above-mentioned shortcomings and provide a technical solution that can solve the above-mentioned problems.
[0005] A continuous die for processing a 匚-shaped pulley shell is used for continuously punching a material strip into multiple workpieces, including an upper die body and a lower die body that are butt-jointed with each other, and the upper die body and the lower die body are divided from front to back into a line pressing section, a trimming section, a folding section, a bending section and a cutting section; a line pressing punch for pressing a position of the workpiece close to an edge is arranged at the position of the upper die body corresponding to the line pressing section; a trimming punch for trimming a position of the workpiece at the edge is arranged at the position of the upper die body corresponding to the trimming section, and a connecting portion is retained when the trimming punch punches the material strip to connect two adjacent workpieces formed after punching; a folding punch for folding the workpiece at the position where the line is pressed is arranged at the position of the upper die body corresponding to the folding section; a bending punch for 匚-shaped bending is arranged at the position of the upper die body corresponding to the bending section; a cutting punch for cutting the connecting portion between two adjacent workpieces is arranged at the position of the upper die body corresponding to the cutting section.
[0006] Preferably, a deburring punch for deburring the edge of the workpiece is further provided at the position between the corresponding trimming section and the flanging section of the upper die body.
[0007] Preferably, a first punching punch for punching a pilot hole in the strip is further provided at the position of the upper die body before the corresponding pressing line segment, and the first punching punch corresponds to a position outside the position of the workpiece punched on the strip.
[0008] Preferably, a second punching punch for punching a rotating shaft hole in the strip is further provided at the position of the upper die body before the corresponding pressing line segment, and the second punching punch corresponds to the position of the workpiece punched on the strip.
[0009] Preferably, the trimming punch is provided with two sections, and the two sections of trimming punches are arranged to punch the left and right regions of the strip in sequence, so as to form a connecting portion in the middle of the punched portion of the strip.
[0010] Preferably, the bending punch has a 45-degree bending punch and a 90-degree bending punch, and the 45-degree bending punch and the 90-degree bending punch perform bending stamping on the same position on the strip in sequence.
[0011] Preferably, the upper die body includes an upper die base, an upper backing plate installed at the lower end of the upper die base, an upper clamping plate installed at the lower end of the upper backing plate for fixing the punch, a stop plate installed at the lower end of the upper clamping plate, and a stripper plate installed at the lower end of the stop plate. The lower die body includes a lower die base, a plurality of spaced-apart lower pads installed at the lower end of the lower die base, a lower back plate installed at the upper end of the lower die base, a lower backing plate installed on the lower back plate, and a lower template installed on the lower backing plate.
[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0013] Through the cooperation of the pressing line punch, the trimming punch and the flanging punch, the situation of directly using the punch for complex punching is avoided, which reduces the wear of the punch during the processing process, thereby prolonging the service life of the punch, reducing the replacement frequency of the punch in mass production. On the one hand, the prolongation of the service life of the punch reduces the equipment downtime caused by replacing the punch. In mass production, frequent replacement of the punch will cause the equipment to stop running, affecting the continuity of production. On the other hand, the punches at each station work together, which can efficiently process the strip into multiple workpieces, reducing the faults and adjustment time during the processing process, thereby improving the efficiency of the entire production and processing;
[0014] Due to the extended service life of the punching tool, there is no need to frequently replace the new punching tool during mass production, which directly reduces the production cost. The punching tool is an important consumable in mold processing. Frequent replacement of the punching tool not only requires purchasing new ones but also involves labor costs for replacing the punching tool. By reducing the number of punching tool replacements, these cost expenditures are effectively reduced;
[0015] In the hemming operation, since the creasing operation ensures that the crease does not shift, the accuracy of the hemming operation is improved. The precise hemming operation helps to ensure the dimensional accuracy and appearance quality of the pulley housing, making the product more compliant with the design requirements in terms of edge treatment and improving the overall product quality of the pulley housing.
[0016] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0018] Figure 1 is a schematic structural diagram of the workpiece in the present utility model;
[0019] Figure 2 is a schematic structural diagram of the present utility model;
[0020] Figure 3 is a layout drawing of the strip material in the present utility model;
[0021] Figure 4 is a schematic plan view of the upper clamping plate and its various punching tools after installation in the present utility model.
[0022] The reference numerals and names in the drawings are as follows:
[0023] Upper die body 10, upper die holder 11, upper backing plate 12, upper clamping plate 13, stop plate 14, stripper plate 15, lower die body 20, lower die holder 21, lower spacer block 22, lower back plate 23, lower backing plate 24, lower template 25, creasing punching tool 31, edge cutting punching tool 32, hemming punching tool 33, bending punching tool 34, blanking punching tool 35, pressing burr punching tool 36, first punching punching tool 37, second punching punching tool 38, workpiece 40, connecting portion 41. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0024] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0025] Please refer to Figures 1-4 , in the embodiments of the present utility model, a progressive die for processing a C-shaped pulley housing is proposed, which is used to continuously punch a strip of material into a plurality of workpieces 40. It includes an upper die body 10 and a lower die body 20 that are butt-jointed and cooperate with each other. The upper die body 10 and the lower die body 20 are divided into a wire pressing section, a trimming section, a flanging section, a bending section, and a blanking section from front to back; at the position of the upper die body 10 corresponding to the wire pressing section, a wire pressing punch 31 for pressing the position of the workpiece 40 near one edge is provided; at the position of the upper die body 10 corresponding to the trimming section, a trimming punch 32 for trimming the edge of the workpiece 40 is provided, and when the trimming punch 32 punches the strip of material, a connecting portion 41 is reserved to connect two adjacent workpieces 40 formed after punching; at the position of the upper die body 10 corresponding to the flanging section, a flanging punch 33 for flanging the position of the workpiece 40 where the wire is pressed is provided; at the position of the upper die body 10 corresponding to the bending section, a bending punch 34 for performing a C-shaped bending on the workpiece 40 is provided; at the position of the upper die body 10 corresponding to the blanking section, a blanking punch 35 for cutting the connecting portion 41 between two adjacent workpieces 40 is provided.
[0026] In the above technical solution, in the wire pressing section, the wire pressing punch 31 at the corresponding position of the upper die body 10 performs a wire pressing operation on the position of the workpiece 40 near one edge. This operation is to prepare for the subsequent flanging. By applying a certain pressure, a specific wire pressing is formed on the workpiece 40 to guide the subsequent flanging direction and reduce the acting force during the subsequent flanging. Then in the trimming section, the trimming punch 32 trims the edge of the workpiece 40, and the connecting portion 41 is reserved to connect two adjacent workpieces 40 formed after punching, so as to ensure the continuity of the strip of material during the continuous processing and facilitate the subsequent processes. Then in the flanging section, the flanging punch 33 performs a flanging operation on the position of the workpiece 40 where the wire is pressed. Due to the previous wire pressing operation, the acting force between the flanging punch 33 and the workpiece 40 is reduced, and it can ensure that the fold mark does not shift, improving the accuracy of the flanging operation. In the bending section, the bending punch 34 performs a C-shaped bending on the workpiece 40, gradually processing the workpiece 40 into a C-shaped structure. Finally, in the blanking section, the blanking punch 35 cuts the connecting portion 41 between two adjacent workpieces 40, thereby continuously punching the strip of material into a plurality of complete workpieces 40.
[0027] By pressing the line to change the local stress state and structural characteristics of the workpiece 40, the hemming punch 33 works more smoothly during operation, reducing the adverse effects on the workpiece 40 and the punch itself. The trimming punch 32 trims the edge while retaining the connecting part 41, which not only realizes the processing of the edge of the workpiece 40 but also ensures the continuity of the strip during the entire continuous processing, laying a foundation for the subsequent bending and blanking processes. Each punch accurately processes the strip in its corresponding station in sequence, and finally processes the strip into multiple U-shaped pulley housing workpieces 40.
[0028] Therefore, in this progressive die, through the cooperation of the line pressing punch 31, the trimming punch 32 and the hemming punch 33, the situation of directly using the punch for complex punching is avoided, which reduces the wear of the punch during the processing, thereby extending the service life of the punch. In mass production, the replacement frequency of the punch is reduced. On the one hand, the extension of the punch service life reduces the equipment downtime caused by replacing the punch. In mass production, frequently replacing the punch will cause the equipment to stop running, affecting the continuity of production. On the other hand, the punches at each station work together to efficiently process the strip into multiple workpieces 40, reducing the faults and adjustment time during the processing, thereby improving the efficiency of the entire production and processing;
[0029] Moreover, due to the extension of the punch service life, there is no need to frequently replace new punches during mass production, which directly reduces the production cost. The punch is an important consumable in die processing. Frequently replacing the punch not only requires purchasing new punches but also involves the labor cost of replacing the punch, etc. By reducing the punch replacement times, these cost expenditures are effectively reduced;
[0030] In addition, during the hemming operation, since the line pressing operation ensures that the crease does not shift, the accuracy of the hemming operation is improved. The accurate hemming operation helps to ensure the dimensional accuracy and appearance quality of the pulley housing, making the product more in line with the design requirements in terms of edge treatment and improving the product quality of the entire pulley housing.
[0031] Please refer to Figures 2-4, in the embodiment of the present utility model, it is further proposed that a deburring punch 36 for pressing the edge of the workpiece 40 is further provided at the position between the trimming section and the flanging section of the upper die body 10; a first punching punch 37 for opening a guiding hole on the strip is further provided at the position of the upper die body 10 before the pressing line segment, and the first punching punch 37 corresponds to a position outside the position of the workpiece 40 punched on the strip; a second punching punch 38 for opening a rotating shaft hole on the strip is further provided at the position of the upper die body 10 before the pressing line segment, and the second punching punch 38 corresponds to the position of the workpiece 40 punched on the strip; the first punching punch 37 and the second punching punch 38 lay the foundation for the entire processing process in the most front-end process. The opening of the guiding hole facilitates the positioning of the strip in subsequent processes and ensures the processing accuracy of each punch; the opening of the rotating shaft hole is a necessary process for the pulley housing structure; the wire pressing punch 31 provides accurate flanging guidance for the flanging punch 33, and the two cooperate to ensure the flanging quality; the trimming punch 32 and the deburring punch 36 act on the edge of the workpiece 40 successively. The deburring operation after trimming timely processes the burrs generated by trimming and ensures the quality of the edge of the workpiece 40; and the orderly progress of all these processes is to finally smoothly process the strip into a plurality of qualified U-shaped pulley housing workpieces 40 in the blanking section.
[0032] Please refer to Figures 3-4 , in the embodiment of the present utility model, it is further proposed that the trimming punch 32 is provided with two sections, and the two sections of the trimming punch 32 are arranged to punch the left and right regions of the strip in sequence, so that a connecting portion 41 is formed in the middle of the punched portion of the strip; when the processing starts, the first section of the trimming punch 32 first punches one side region of the strip, and then, the second section of the trimming punch 32 then punches the other side region of the strip. By this sequential punching method, a connecting portion 41 is formed in the middle part of the punched portion of the strip. This punching method can more accurately control the shape of the strip after punching, ensure that the size and position of the connecting portion 41 meet the requirements, and is also beneficial to reducing the deformation of the strip during the punching process. The bending punch 34 has a 45-degree bending punch 34 and a 90-degree bending punch 34. The 45-degree bending punch 34 and the 90-degree bending punch 34 bend and punch the same position on the strip in sequence. This step-by-step bending method can gradually change the shape of the strip. Compared with bending to 90 degrees at one time, it can reduce the stress concentration during the bending process, make the bending more uniform and smooth, and can better control the bending accuracy to ensure that the bending part of the U-shaped pulley housing meets the design requirements.
[0033] Please refer to Figure 2, in the embodiment of the present utility model, it is further proposed that the upper die body 10 includes an upper die base 11, an upper backing plate 12 installed at the lower end of the upper die base 11, an upper clamping plate 13 installed at the lower end of the upper backing plate 12 for fixing the punching die, a stop plate 14 installed at the lower end of the upper clamping plate 13, and a stripper plate 15 installed at the lower end of the stop plate 14. The upper die base 11 is the basic support component of the entire upper die body 10, providing an installation foundation for other components and bearing the reaction force during the stamping process; the upper backing plate 12 is installed at the lower end of the upper die base 11, and its main function is to disperse the punching force to prevent the upper die base 11 from being damaged due to excessive local stress; the upper clamping plate 13 is installed at the lower end of the upper backing plate 12 for fixing various punching dies to ensure the stable position of the punching die during the stamping process; the stop plate 14 is installed at the lower end of the upper clamping plate 13, and it cooperates with the stripper plate 15 to control the stripping during the stamping process; the stripper plate 15 is installed at the lower end of the stop plate 14. During stamping, the stripper plate 15 first contacts the strip, applies a certain pressure to the strip, presses the strip against the lower die to prevent the strip from moving during the stamping process, and after stamping is completed, the stripper plate 15 is responsible for separating the strip from the punching die so that the strip can smoothly enter the next station. When performing stamping operations such as wire pressing, edge cutting, flanging, bending, and blanking, the punching die is fixed on the upper clamping plate 13, and the punching force is transmitted through the upper die base 11 to the upper backing plate 12 for dispersion and then acts on the punching die; the stop plate 14 and the stripper plate 15 work together to ensure the fixation of the strip during the downward movement of the punching die and ensure that the strip can smoothly separate from the punching die when the punching die rises, thus ensuring the smooth progress of the entire stamping process.
[0034] The lower die body 20 includes a lower die base 21, a plurality of spaced-apart lower cushion blocks 22 mounted at the lower end of the lower die base 21, a lower back plate 23 mounted at the upper end of the lower die base 21, a lower backing plate 24 mounted on the lower back plate 23, and a lower template 25 mounted on the lower backing plate 24. The lower die base 21 is the basic support structure of the lower die body 20, bearing the pressure during the entire stamping process; the lower cushion blocks 22 are mounted at the lower end of the lower die base 21, and the plurality of lower cushion blocks 22 are spaced apart, playing a role in supporting the lower die base 21 and being able to adjust the height of the lower die base 21 according to actual needs; the lower back plate 23 is mounted at the upper end of the lower die base 21, providing an installation foundation for the lower backing plate 24 and also helping to disperse the pressure; the lower backing plate 24 is mounted on the lower back plate 23, further dispersing the pressure and protecting the lower die base 21 and the lower back plate 23; the lower template 25 is mounted on the lower backing plate 24, and the lower template 25 corresponds to the stripping plate 15 of the upper die. The strip is placed on the lower template 25. During the stamping process, the lower template 25 provides support for the strip and cooperates with the punching die of the upper die to complete various stamping processes; during the stamping process, the upper die body 10 moves downward, and the stripping plate 15 first contacts the strip and presses it tightly against the lower template 25; then, the punching die in the upper die body 10 cooperates with the lower template 25 to complete operations such as wire pressing, edge cutting, hemming, bending, and blanking; the lower template 25 plays a role in stabilizing the strip and cooperating with the punching die to complete stamping throughout the process, and the other components in the lower die body 20 work together to provide stable support and pressure dispersion functions for the stamping process, ensuring the accuracy of the stamping operation and the service life of the die.
[0035] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model.
Claims
1. A progressive die for processing the housing of a U-shaped pulley, which is used to continuously punch a strip of material into a plurality of workpieces (40), comprising an upper die body (10) and a lower die body (20) that are butt-jointed and cooperate with each other, characterized in that, The upper die body (10) and the lower die body (20) are divided into a wire pressing section, a trimming section, a hemming section, a bending section, and a blanking section from front to back; at the position of the upper die body (10) corresponding to the wire pressing section, there is a wire pressing punch (31) for pressing the wire at a position near one edge of the workpiece (40); at the position of the upper die body (10) corresponding to the trimming section, there is a trimming punch (32) for trimming the edge of the workpiece (40), and when the trimming punch (32) punches the strip, a connecting portion (41) is reserved to connect two adjacent workpieces (40) formed after punching; at the position of the upper die body (10) corresponding to the hemming section, there is a hemming punch (33) for hemming the position of the workpiece (40) where the wire is pressed; at the position of the upper die body (10) corresponding to the bending section, there is a bending punch (34) for performing a U-shaped bending on the workpiece (40); at the position of the upper die body (10) corresponding to the blanking section, there is a blanking punch (35) for cutting off the connecting portion (41) between two adjacent workpieces (40).
2. The progressive die for processing the C-shaped pulley housing according to claim 1, characterized in that, At the position between the trimming section and the hemming section of the upper die body (10), there is also a deburring punch (36) for pressing the burrs on the edge of the workpiece (40).
3. The progressive die for machining a C-shaped pulley housing according to claim 1, characterized in that, At the position before the wire pressing section of the upper die body (10), there is also a first punching punch (37) for punching a pilot hole on the strip, and the first punching punch (37) corresponds to a position outside the position where the workpiece (40) is punched on the strip.
4. The progressive die for machining a C-shaped pulley housing according to claim 1, characterized in that, At the position before the wire pressing section of the upper die body (10), there is also a second punching punch (38) for punching a rotating shaft hole on the strip, and the second punching punch (38) corresponds to the position where the workpiece (40) is punched on the strip.
5. A progressive die for machining a C-shaped pulley housing according to claim 1, characterized in that, The trimming punch (32) is provided with two sections, and the two sections of the trimming punch (32) are set to punch the left and right regions of the strip in sequence, so that a connecting portion (41) is formed in the middle of the punched part of the strip.
6. The progressive die for processing the C-shaped pulley housing according to claim 1, characterized in that The bending punch (34) has a 45-degree bending punch (34) and a 90-degree bending punch (34), and the 45-degree bending punch (34) and the 90-degree bending punch (34) perform bending stamping on the same position on the strip in sequence.
7. A progressive die for machining a C-shaped pulley housing according to claim 1, characterized in that, The upper die body (10) includes an upper die base (11), an upper backing plate (12) installed at the lower end of the upper die base (11), an upper clamping plate (13) installed at the lower end of the upper backing plate (12) for fixing the punch, a stop plate (14) installed at the lower end of the upper clamping plate (13), and a stripper plate (15) installed at the lower end of the stop plate (14). The lower die body (20) includes a lower die base (21), a plurality of spaced lower pads (22) installed at the lower end of the lower die base (21), a lower back plate (23) installed at the upper end of the lower die base (21), a lower backing plate (24) installed on the lower back plate (23), and a lower template (25) installed on the lower backing plate (24).