A stamping device and a stamping method

Abstract

The present application discloses a stamping device and a stamping method, which relates to the technical field of valve plate stamping equipment. The stamping device includes an upper stamping die set, a lower stamping die set and a guide mechanism, wherein the upper stamping die set is provided with a punching hole punch, a pre-punching punch, a reverse concave upper die, a front concave punch, a fine stamping punch and a blanking punch in sequence; the lower stamping die set is provided with a corresponding concave die, and structures such as a contoured support convex part and a chamfering component are added. In addition, the upper and lower stamping die sets also include a variety of auxiliary components such as a discharge spring assembly, a guide pin, etc., to ensure continuous progressive stamping with high precision and stability. The present application realizes efficient and accurate production of double concave valve plates through multi-station continuous processing, which significantly improves product consistency and production efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of valve plate stamping equipment, and particularly relates to a stamping device and a stamping method. Background Art

[0002] In the compressor structure, the valve plate, as one of its core components, plays a crucial role. The valve plate not only needs to have good sealing performance but also be able to withstand high pressure and high-temperature working environments. And modern high-performance compressors have higher requirements for the valve plate, especially the increasing demand for double-concave valve plates. The reverse side of the double-concave valve plate has an exhaust valve seat, and the front side has a suction valve seat. Moreover, the structure of the press-fitting overlapping area of the two makes its precise processing more complex. Therefore, it is particularly important to develop an efficient stamping device.

[0003] The existing double-concave valve plate stamping dies mainly adopt a single-station or multi-station combination method for processing. Among them, although the single-station die is simple to operate, its production efficiency is low and it is difficult to meet the needs of large-scale production. The multi-station combination die can improve production efficiency, but there are still some problems in actual application. After the preliminary stamping is completed, the final product requirements are achieved through processes such as rough grinding, fine grinding, and deburring. Although this method can ensure product quality, due to the cumbersome processes, the overall production cycle is long, resulting in low production efficiency.

[0004] The main defect of the existing technology is that whether it is a single-station or multi-station combination die, both face the problems of long production processes and low working efficiency when processing double-concave valve plates. Especially in the application of multi-station combination dies, frequent die change and complex post-processing procedures severely restrict the improvement of production efficiency. How to provide a stamping die and a stamping method with short valve plate production processes and high efficiency is a technical problem that those skilled in the art need to solve currently. Summary of the Invention

[0005] In order to help solve the problem of high stamping efficiency of double-concave valve plates, the present application provides a stamping device and a stamping method.

[0006] In the first aspect, the present application provides a stamping device, adopting the following technical solution:

[0007] A stamping device includes an upper pressing module, a lower pressing module, and a guiding mechanism for guiding the upper pressing module. The upper pressing module includes an upper template. Along the advancing direction of the strip, the upper template is sequentially provided with a punching process hole punch, a pre-punch punch, a reverse side press-fitting upper die, a front side press-fitting punch, a fine punching punch, and a blanking punch. The lower pressing module is provided with a concave template, and the concave template is correspondingly provided with a punching process hole die, a pre-punch die, a reverse side press-fitting die, a front side press-fitting lower die, a fine punching die, and a blanking die with the upper template.

[0008] By adopting the above technical solution, through multi-station continuous progressive stamping of the valve plate, multiple transfers and processing steps in the traditional process are reduced, the production cycle is significantly shortened, and the overall production efficiency is improved; each station is responsible for different stamping operations respectively, ensuring precise control of each link. The design of the guiding mechanism ensures the stability and precision of the upper pressing module during movement. In particular, the combined use of the concave die for reverse pressing and the convex die for convex and concave pressing on the front effectively forms a double-concave structure, improving the overall processing quality and consistency of the valve plate; the entire device integrates multiple functional modules, from punching process holes, pre-punching, reverse concave pressing, front concave pressing, fine blanking to blanking, enabling the originally complex processes to be completed in one die, greatly simplifying the production process flow.

[0009] Optionally, a profiling support convex portion is provided on the lower die for convex and concave pressing on the front, and the profiling support convex portion is adaptively arranged with the convex and concave portion of the convex die for convex and concave pressing on the reverse.

[0010] By adopting the above technical solution, the convex die for convex and concave pressing on the reverse performs preliminary concave pressing on the reverse to form the exhaust valve seat, removing a part of the material inside the exhaust valve seat. When the convex die for convex and concave pressing on the front performs convex and concave pressing on the front, the profiling support convex portion performs fine pressing on the exhaust valve seat pre-concave pressed on the reverse, forming the double-concave dimensions on the front and the reverse, improving the quality and stamping efficiency of the stamped valve plate.

[0011] Optionally, the pre-punching convex die includes a pre-punching hole convex die and a pre-cutting carrier hole convex die; the pre-punching hole convex die includes a pre-punching suction hole convex die, a pre-punching exhaust hole convex die, and a pre-punching small hole convex die. The pre-cutting carrier hole convex die is used for pre-cutting the carrier holes connected to the two carriers. The pre-punching concave die includes a pre-punching hole concave die and a pre-cutting carrier hole concave die. The pre-punching hole concave die includes a pre-punching suction hole concave die and a pre-punching exhaust hole concave die corresponding to the pre-punching hole convex die.

[0012] By adopting the above technical solution, the setting of the pre-punching convex die and the pre-cutting carrier hole convex die can effectively improve the precision and efficiency of subsequent processes. The pre-punching hole convex die can pre-form the basic shapes of the suction hole and the exhaust hole, providing space for the material flow during the subsequent process forming. The pre-cutting carrier hole convex die and the pre-cutting carrier hole concave die can perform preliminary cutting on the product outer shape at an early stage, providing space for the material flow during the subsequent process forming, helping to ensure the precision of the valve plate stamping forming.

[0013] Optionally, the fine blanking convex die includes a fine blanking small hole convex die, a fine blanking valve plate positioning hole convex die, a fine blanking suction hole convex die, a fine blanking exhaust hole convex die, a fine blanking carrier hole convex die, and a fine blanking side hole convex die. The fine blanking concave die is correspondingly provided with a fine blanking small hole concave die, a fine blanking valve plate positioning hole concave die, a fine blanking suction hole concave die, a fine blanking exhaust hole concave die, a fine blanking carrier hole concave die, and a fine blanking side hole concave die corresponding to the fine blanking convex die.

[0014] By adopting the above technical solutions, the settings of the fine blanking punch and the fine blanking die can achieve the precise forming of the valve plate. Specifically, the fine blanking suction hole punch and the fine blanking suction hole die, and the fine blanking exhaust hole punch and the fine blanking exhaust hole die respectively achieve the precise stamping of the suction hole and the exhaust hole, ensuring the accuracy of the hole diameter and position; the fine blanking carrier hole punch and the fine blanking side hole punch, together with the fine blanking carrier hole die and the fine blanking side hole die for stamping, finely cut the outer shape of the valve plate to make it reach the final required size and shape, improving the overall processing quality and production efficiency of the valve plate.

[0015] Optionally, the lower pressing module further includes a chamfering component. The chamfering component includes a fixing block fixed on the lower pressing module, a knockout block installed on the fixing block, and a chamfering punch. A floating block ejector rod is provided on one side of the knockout block close to the fixing block. One end of the floating block ejector rod abuts against the knockout block, and the other end is tightly abutted against the lower pressing module through a knockout spring.

[0016] By adopting the above technical solutions, the setting of the chamfering component enables the valve plate to be subjected to round hole chamfering treatment after stamping, avoiding the subsequent separate chamfering process, improving the production efficiency and product quality. The design of the floating block ejector rod and the knockout spring ensures the stability and reliability of the knockout block during the working process, and helps the strip to be separated from the chamfering punch in a timely manner.

[0017] Optionally, the upper pressing module further includes an upper cover plate, an upper die base, an upper die backing plate, a stripper backing plate, and a stripper plate arranged in sequence in the direction close to the lower pressing module. The upper template is located between the upper die backing plate and the stripper backing plate. The upper cover plate, the upper die base, the upper die backing plate, and the upper template are detachably and fixedly connected. The upper template and the stripper backing plate are arranged at an interval. The stripper plate is connected to the upper template through a stripper spring assembly.

[0018] By adopting the above technical solutions, a stable structure is formed among the components of the upper pressing module, ensuring the accuracy and stability during the stamping process. The detachable and fixed connection design between the upper cover plate, the upper die base, the upper die backing plate, and the upper template facilitates the maintenance and adjustment of each module, improving the production flexibility. The interval setting between the upper template and the stripper backing plate, and the stripper plate being connected to the upper template through a stripper spring assembly enable the upper template to quickly reset after each stamping, effectively preventing the upper template from sticking to the strip and improving the production efficiency.

[0019] Optionally, the lower pressing module further includes a lower support plate, lower feet, a lower die base, and a lower die backing plate arranged in sequence in the direction close to the upper pressing module. The concave template is located on the side of the lower die backing plate close to the upper pressing module. The lower support plate, the lower feet, the lower die base, the lower die backing plate, and the concave template are detachably and fixedly connected.

[0020] By adopting the above technical solution, the structural design of each part of the downward pressing module is reasonable and well-organized, which can effectively improve the overall stability and service life of the mold. Specifically: the design of the lower support plate, lower pad feet, lower die base and lower die backing plate makes the entire downward pressing module structure more stable, improving the accuracy and reliability during the stamping process; the detachable fixed connection method between components facilitates maintenance and adjustment, reducing the maintenance cost and time.

[0021] Optionally, the guiding mechanism includes a plurality of symmetrically arranged outer guiding components for guiding the upper pressing module, a plurality of symmetrically arranged inner guiding components, and a plurality of guiding pins for positioning the strip. The guiding pins are fixedly installed on the upper template.

[0022] By adopting the above technical solution, a plurality of symmetrically arranged outer guiding components and inner guiding components can ensure the precise alignment of the upper pressing module during the up and down movement, effectively avoiding the offset or misalignment between the upper pressing module and the lower pressing module, thereby improving the stamping accuracy and stability. At the same time, the setting of the guiding pins can achieve the precise positioning of the strip, ensuring the accurate position of the material at each station, and further improving the consistency and yield rate of the products.

[0023] Optionally, the outer guiding component includes an outer guide post installed on the lower pressing module and an outer guide sleeve installed on the upper pressing module. The outer guide post passes through the outer guide sleeve and is in sliding fit with the outer guide sleeve. The inner guiding component includes an inner guide post installed on the upper pressing module and an inner guide sleeve installed on the lower pressing module. When the upper pressing module and the lower pressing module are combined, the inner guide post passes through the inner guide sleeve and is in sliding fit with the inner guide sleeve.

[0024] By adopting the above technical solution, the setting of the outer guiding component and the inner guiding component ensures the precise guiding of the upper pressing module during the movement, avoiding product quality problems caused by offset during the stamping process. The sliding fit between the outer guide post and the outer guide sleeve, and between the inner guide post and the inner guide sleeve enables the upper pressing module to move up and down stably, ensuring the stamping accuracy and consistency of each station, and improving the stamping efficiency and product quality.

[0025] In a second aspect, the present application provides a stamping method, adopting the following technical solution:

[0026] A stamping method, based on the above stamping device, intermittently and equidistantly conveys the strip and performs multi-station continuous progressive stamping on the strip, specifically including the following steps:

[0027] S1. Punching process hole station: used to punch strip positioning holes for positioning the strip, valve plate positioning holes for positioning the valve plate, and side holes for connecting adjacent valve plates;

[0028] S2. Pre-punching station: used for pre-cutting the carrier holes connected to the two carriers, pre-punching the suction holes, pre-punching the exhaust holes, and pre-punching the small holes;

[0029] S3. Reverse side concave pressing station: used for pressing the exhaust valve seat on the reverse side of the preform;

[0030] S4. Front side concave pressing station: used for forming the concave of the suction valve seat on the front side and precision pressing the concave of the exhaust valve seat on the reverse side;

[0031] S5. Precision punching small hole station: used for precision punching small holes and sizing the small holes;

[0032] S6. Precision punching valve hole station: used for precision punching the suction holes, precision punching the exhaust holes, precision punching the valve plate positioning holes, and precision punching the carrier holes;

[0033] S7. Precision punching side hole station: used for precision punching the side holes between two adjacent valve plates;

[0034] S8. Round hole chamfering station: used for chamfering the valve plate positioning holes, suction holes, exhaust holes, and small holes;

[0035] S9. Blanking station: used for cutting and blanking to obtain the finished stamping valve plate.

[0036] By adopting the above technical solutions, multi-station continuous progressive stamping of the double-concave valve plate is realized, the production process flow is simplified, the turnover time between processes is reduced, and the production efficiency is improved. Specifically: The punching process hole station ensures the accurate positioning of subsequent processes, and at the same time reserves space for material flow, ensuring the smooth progress of subsequent stamping forming. The pre-punching station cuts the product outer shape edges and pre-punching holes in advance, reserving space for the material flow generated by subsequent stamping processes; The reverse side concave pressing station effectively removes part of the material in the exhaust valve seat, providing a basis for subsequent front side concave pressing and improving the product quality; The front side concave pressing station precisely presses the reverse side through the profiling support protrusion, forming precise double-concave dimensions on both the front and reverse sides simultaneously, significantly improving the stamping accuracy and efficiency; The precision punching small hole station precisely sizes the small holes, ensuring the dimensional consistency of the final product; The precision punching valve hole station further precision punches the suction holes, exhaust holes, valve plate positioning holes, and carrier holes, improving the accuracy of the hole diameter and position; The precision punching side cutting edge station finalizes the outer shape dimensions between two adjacent valve plates, ensuring that the overall shape of the valve plate meets the design requirements; The round hole chamfering station chamfers the valve plate positioning holes, suction holes, exhaust holes, and small holes, avoiding sharp edges and improving the use safety; The blanking station realizes the cutting and separation of the finished product, completing the entire stamping process. This stamping method greatly shortens the production cycle, improves the production efficiency, and at the same time ensures the quality and precision of the valve plate through the multi-station continuous progressive method.

[0037] In summary, the present application includes at least one of the following beneficial technical effects:

[0038] 1. Through the multi-station continuous progressive stamping method, the full-process automated processing from the process hole to the final blanking is realized, significantly shortening the production process and improving the production efficiency;

[0039] 2. The profiling support convex part is set to be adapted to the reverse pressing concave-convex die, ensuring the precise forming of the double concave dimensions on the front and reverse sides, and improving the consistency and product quality of the valve plate;

[0040] 3. By combining multiple stamping steps such as pre-punching, fine punching, and round chamfering, subsequent processes such as grinding and deburring are reduced, further simplifying the production process and reducing the labor intensity and cost. Description of the Drawings

[0041] Figure 1 It is the reverse view of the valve plate stamped in the embodiment of the present application;

[0042] Figure 2 It is the front view of the valve plate stamped in the embodiment of the present application;

[0043] Figure 3 It is the front view of a stamping device disclosed in the present application;

[0044] Figure 4 It is Figure 3 The view in the direction of A in

[0045] Figure 5 It is the top view of the downward pressing module disclosed in the present application;

[0046] Figure 6 It is the side view of a stamping device disclosed in the present application;

[0047] Figure 7 It is the strip diagram of a stamping method disclosed in the present application;

[0048] Figure 8 It is Figure 7 The partial enlarged view at the position I in

[0049] Explanation of the Reference Numerals:

[0050] 1. Upper pressing module; 11. Upper template; 111. Punch for punching process holes; 112. Pre-punching punch; 113. Reverse pressing concave upper die; 114. Front pressing convex and concave die; 115. Fine blanking punch; 116. Blanking punch; 12. Upper cover plate; 13. Upper die base; 14. Upper die backing plate; 15. Stripping backing plate; 16. Stripping plate; 17. Stripping spring assembly; 171. Stripping spring; 172. Fixing screw; 2. Lower pressing module; 21. Die template; 211. Die for punching process holes; 212. Pre-punching die; 213. Reverse pressing convex and concave die; 214. Front pressing concave lower die; 2141. Profiled supporting convex part; 215. Fine blanking die; 216. Blanking die; 22. Chamfering assembly; 221. Fixing block; 222. Ejector block; 223. Chamfering punch; 224. Floating block ejector rod; 225. Ejector spring; 23. Lower support plate; 24. Lower pad foot; 25. Lower die base; 26. Lower die backing plate; 3. Guiding mechanism; 31. Outer guiding assembly; 311. Outer guide pillar; 312. Outer guide sleeve; 32. Inner guiding assembly; 321. Inner guide pillar; 322. Inner guide sleeve; 33. Guide pin; 100. Tape positioning hole; 101. Suction hole; 102. Suction valve seat; 103. Exhaust hole; 104. Exhaust valve seat; 105. Valve plate positioning hole; 106. Small hole; 107. Carrier; 108. Carrier edge hole; 109. Side hole. Detailed implementation manners

[0051] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can completely combine the embodiments of the present invention and obtain other embodiments without creative labor, and these embodiments are also within the protection scope of the present invention; it should be noted that with reference to Figure 1 and Figure 2 , the double-concave valve plate stamped in the embodiments of the present application has a suction valve seat 102 on the front side, an exhaust valve seat 104 on the reverse side, an overlapping area between the exhaust seat and the suction valve seat 102 on the reverse side and the front side, and is also provided with a plurality of valve plate positioning holes 105, a plurality of small holes 106, a suction hole 101 and an exhaust hole 103 penetrating through the valve plate.

[0052] The embodiments of the present application disclose a stamping device.

[0053] A stamping device. With reference to Figure 3, including an upper pressing module 1, a lower pressing module 2 and a guiding mechanism 3. The upper pressing module 1 is installed on the upper pressing head of the press, and the lower pressing module 2 is installed on the base of the press. The upper pressing module 1 punches and forms the strip on the lower pressing module 2 driven by the upper pressing head. The guiding mechanism 3 is used to guide the upper pressing module 1 to improve the repetitive accuracy of the upper pressing module 1 for punching the strip. The upper pressing module 1 includes an upper template 11. Along the advancing direction of the strip, the upper template 11 is successively provided with a punching process hole punch 111, a pre-punch punch 112, a reverse concave pressing upper die 113, a front convex pressing die 114, a fine punching punch 115 and a blanking punch 116. The lower pressing module 2 is provided with a concave template 21. Corresponding to the upper template 11, the concave template 21 is provided with a punching process hole die 211, a pre-punch die 212, a reverse convex pressing die 213, a front concave pressing lower die 214, a fine punching die 215 and a blanking die 216. The stamping die device performs multi-station continuous progressive stamping on the valve plate, reducing multiple transfers and processing steps in the traditional process, significantly shortening the production cycle and improving the overall production efficiency. Each station is responsible for different stamping operations to ensure precise control of each link. The design of the guiding mechanism 3 ensures the stability and guiding accuracy of the upper pressing module 1 during movement. The combined use of the reverse concave pressing upper die 113 and the front convex pressing die 114 effectively forms a double concave structure, improving the overall processing quality and consistency of the valve plate. The entire device integrates multiple functional modules, from punching process holes, pre-punching, reverse concave pressing, front concave pressing, fine punching to blanking, enabling the originally complex process to be completed in one die, greatly simplifying the production process flow.

[0054] Refer to Figure 4 , a profiling support convex part 2141 is provided on the front concave pressing lower die 214. The profiling support convex part 2141 is adaptively arranged with the convex pressing part of the reverse convex pressing die 213. The reverse convex pressing die 213 performs preliminary concave pressing on the reverse side to form the exhaust valve seat 104, removing a part of the material inside the exhaust valve seat 104. When the front convex pressing die 114 performs front concave pressing, the profiling support convex part 2141 finely presses the exhaust valve seat 104 pre-concave on the reverse side, forming the front suction valve seat 102 and the reverse exhaust valve seat 104, improving the quality of the stamped valve plate and the stamping efficiency.

[0055] Refer to Figure 3, the pre-punching punch 112 includes a pre-punching hole punch and a pre-cutting carrier edge hole punch; the pre-punching hole punch includes a pre-punching air suction hole punch, a pre-punching air exhaust hole punch, and a pre-punching small hole punch. The pre-cutting carrier edge hole punch is used to pre-cut the carrier edge holes 108 connected to the two carriers 107. The pre-punching die 212 includes a pre-punching hole die and a pre-cutting carrier edge hole die. The pre-punching hole die includes a pre-punching air suction hole die and a pre-punching air exhaust hole die corresponding to the pre-punching hole punch. Specifically, the setting of the pre-punching hole punch and the pre-cutting carrier edge hole punch can effectively improve the accuracy and efficiency of subsequent processes. The pre-punching hole punch and the pre-punching hole die are cooperatively stamped to pre-form the basic shapes of the air suction hole 101 and the air exhaust hole 103, providing space for the material flow during the subsequent process forming. The pre-cutting carrier edge hole punch and the pre-cutting carrier edge hole die are cooperatively stamped to preliminarily cut the product outline at an early stage, providing space for the material flow during the subsequent process forming, which helps to ensure the accuracy of the valve plate stamping forming.

[0056] Refer to Figure 3 , the fine blanking punch 115 includes a fine blanking small hole punch, a fine blanking valve plate positioning hole punch, a fine blanking air suction hole punch, a fine blanking air exhaust hole punch, a fine blanking carrier edge hole punch, and a fine blanking side hole punch. The fine blanking die 215 correspondingly includes a fine blanking small hole die, a fine blanking valve plate positioning hole die, a fine blanking air suction hole die, a fine blanking air exhaust hole die, a fine blanking carrier edge hole die, and a fine blanking side hole die. The setting of the fine blanking punch 115 and the fine blanking die 215 can improve the precise forming of the valve plate. Specifically, the fine blanking air suction hole punch and the fine blanking air suction hole die, and the fine blanking air exhaust hole punch and the fine blanking air exhaust hole die respectively achieve the precise stamping of the air suction hole 101 and the air exhaust hole 103, ensuring the accuracy of the hole diameter and position. The fine blanking carrier edge hole punch and the fine blanking side hole punch, and the fine blanking carrier edge hole die and the fine blanking side hole die are stamped relatively to finely cut the valve plate outline, making it reach the final required size and shape, improving the production efficiency and the overall processing quality of the valve plate.

[0057] Refer to Figure 3, the lower pressing module 2 further includes a chamfering component 22. The chamfering component 22 includes a fixed block 221 fixed on the lower pressing module 2, a blanking block 222 mounted on the fixed block 221, and a chamfering punch 223. A floating block ejector rod 224 is provided on one side of the blanking block 222 close to the fixed block 221. One end of the floating block ejector rod 224 abuts against the blanking block 222, and the other end is tightly abutted against the lower pressing module 2 through a blanking spring 225. In the embodiment of the present application, the number of floating block ejector rods 224 is 14, which are symmetrically arranged on both sides of the strip. The setting of the chamfering component 22 enables the valve plate to be subjected to round hole chamfering treatment after stamping, avoiding the subsequent separate chamfering process, improving the production efficiency and the processing quality of the valve plate. The design of the floating block ejector rod 224 and the blanking spring 225 ensures the stability and reliability of the blanking block 222 during the working process, and helps the strip to be separated from the chamfering punch 223 in a timely manner.

[0058] Refer to Figure 3 , Figure 5 and Figure 6 , the upper pressing module 1 further includes an upper cover plate 12, an upper die base 13, an upper die backing plate 14, a stripper backing plate 15, and a stripper plate 16 which are sequentially arranged in the direction of approaching the lower pressing module 2. The upper template 11 is located between the upper die backing plate 14 and the stripper backing plate 15. The upper cover plate 12, the upper die base 13, the upper die backing plate 14, and the upper template 11 are detachably fixedly connected. The detachable structure is fixed by screws. The upper template 11 and the stripper backing plate 15 are arranged at intervals. The stripper plate 16 is connected to the upper template 11 through a stripper spring assembly 17. The stripper spring assembly 17 includes a stripper spring 171 and a fixing screw 172. The shoulder end of the fixing screw 172 is mounted on the upper die backing plate 14, and the threaded end of the fixing screw 172 is threadedly fixed to the upper template 11. One end of the stripper spring 171 abuts against the shoulder end of the fixing screw 172, and the other end abuts against the upper cover plate 12. In this way, during stripping, the stripper plate 16 separates the strip from the punch on the upper template 11 under the pressing of the stripper spring 171. The components of the upper pressing module 1 form a stable structure, ensuring the accuracy and stability during the stamping process. The detachable fixed connection design between the upper cover plate 12, the upper die base 13, the upper die backing plate 14, and the upper template 11 facilitates the maintenance and adjustment of each module, improving the production flexibility. The interval setting between the upper template 11 and the stripper backing plate 15, and the stripper plate 16 is connected to the upper template 11 through the stripper spring assembly 17, enabling the upper template 11 to quickly reset after each stamping, effectively preventing the upper template 11 from sticking to the strip and improving the production efficiency.

[0059] Refer to Figure 3 and Figure 6, the lower pressing module 2 further includes a lower supporting plate 23, a lower foot pad 24, a lower die holder 25, and a lower die backing plate 26 which are arranged in sequence in the direction approaching the upper pressing module 1. The concave template 21 is located on the side of the lower die backing plate 26 close to the upper pressing module 1. The lower supporting plate 23, the lower foot pad 24, the lower die holder 25, the lower die backing plate 26, and the concave template 21 are detachably fixedly connected; the detachable fixing structure is fixed by screws. The various parts of the lower pressing module 2 are reasonably designed and distinct in levels, which can effectively improve the overall stability and service life of the die; the designs of the lower supporting plate 23, the lower foot pad 24, the lower die holder 25, and the lower die backing plate 26 make the entire lower pressing module 2 more stable, improving the accuracy and reliability during the stamping process; the detachable fixed connection method between the components is convenient for maintenance and adjustment, reducing the maintenance cost and time.

[0060] Referring to Figure 5 and Figure 6 , the guiding mechanism 3 includes a plurality of symmetrically arranged outer guiding components 31 for guiding the upper pressing module 1, a plurality of symmetrically arranged inner guiding components 32, and a plurality of guide pins 33 for positioning the strip. The guide pins 33 are fixedly installed on the upper template 11; in the embodiment of the present application, the number of the outer guiding components 31 is 4, the number of the inner guiding components 32 is 6, and the number of the guide pins 33 is 20. Other embodiments of the present application may also have other numbers of the outer guiding components 31, the inner guiding components 32, and the guide pins 33; the 4 symmetrically arranged outer guiding components 31 and the 6 inner guiding components 32 can ensure the accurate alignment of the upper pressing module 1 during the up and down movement, effectively avoiding the offset or misalignment between the upper pressing module 1 and the lower pressing module 2, thereby improving the stamping accuracy and stability. At the same time, the setting of the 20 guide pins 33 can achieve the precise positioning of the strip, ensuring the accurate position of the material at each station, and further improving the consistency and yield rate of the product.

[0061] Referring to Figure 6 , the outer guiding component 31 includes an outer guide post 311 installed on the lower pressing module 2 and an outer guide sleeve 312 installed on the upper pressing module 1. The outer guide post 311 passes through the outer guide sleeve 312 and is slidably matched with the outer guide sleeve. The inner guiding component 32 includes an inner guide post 321 installed on the upper pressing module 1 and an inner guide sleeve 322 installed on the lower pressing module 2. When the upper pressing module 1 and the lower pressing module 2 are closed, the inner guide post 321 passes through the inner guide sleeve 322 and is slidably matched with the inner guide sleeve 322; the settings of the outer guiding component 31 and the inner guiding component 32 ensure the precise guiding of the upper pressing module 1 during the movement, avoiding product quality problems caused by offset during the stamping process. The sliding cooperation between the outer guide post 311 and the outer guide sleeve 312, and between the inner guide post 321 and the inner guide sleeve 322 enables the upper pressing module 1 to move up and down stably, ensuring the stamping accuracy and consistency of each station, and improving the stamping efficiency and product quality.

[0062] The embodiments of the present application also disclose a stamping method.

[0063] A stamping method, with reference to Figure 7 and Figure 8 , based on the above stamping device, intermittently conveys the strip at equal intervals and performs multi-station continuous progressive stamping on the strip, specifically including the following steps:

[0064] S1. Punching process hole station: used to punch the strip positioning hole 100 for positioning the strip, the valve plate positioning hole 105 for positioning the valve plate, and the side hole 109 for connecting adjacent valve plates;

[0065] S2. Pre-punching station: used to pre-cut the carrier edge hole 108 connected to the two carriers 107, pre-punch the suction hole 101, pre-punch the exhaust hole 103, and pre-punch the small hole 106;

[0066] S3. Reverse concave pressing station: used to press the concave exhaust valve seat 104 on the pre-formed reverse side;

[0067] S4. Front concave pressing station: used to press the concave shape of the suction valve seat 102 on the front side and the fine pressing of the exhaust valve seat 104 on the reverse side;

[0068] S5. Fine punching small hole 106 station: used to fine punch the small hole 106 and size the small hole 106;

[0069] S6. Fine punching valve hole station: used to fine punch the suction hole 101, fine punch the exhaust hole 103, fine punch the valve plate positioning hole 105, and fine punch the carrier edge hole 108;

[0070] S7. Fine punching side hole 109 station: used to fine punch the side hole 109 between adjacent valve plates;

[0071] S8. Round hole chamfering station: used to chamfer the valve plate positioning hole 105, suction hole 101, exhaust hole 103, and small hole 106;

[0072] S9. Blanking station: used to cut and blank to obtain the finished stamping valve plate.

[0073] A stamping method disclosed in an embodiment of the present application realizes multi-station continuous progressive stamping of a double-concave valve plate, simplifies the production process flow, reduces the turnover time between processes, and improves production efficiency. Specifically: Punching process hole station: It ensures the accurate positioning of subsequent processes, and at the same time reserves space for material flow, ensuring the smooth progress of subsequent stamping forming; Pre-punching station: Cuts the outer shape edge and pre-punching holes of the product in advance, reserving space for material flow generated by subsequent stamping processes; Reverse concave pressing station: Effectively removes part of the material in the exhaust valve seat 104, providing a basis for subsequent front concave pressing; Front concave pressing station: Precision presses the exhaust valve seat 104 pre-pressed on the reverse side through the profiling support convex part 2141, so that the front suction valve seat 102 and the reverse exhaust valve seat 104 simultaneously form accurate double-concave dimensions, significantly improving stamping accuracy and efficiency; Precision punching small hole station: Performs precise dimension setting on the small hole 106, ensuring the dimensional consistency of the final product; Precision punching valve hole station: Further precision punches the suction hole 101, precision punches the exhaust hole 103, precision punches the valve plate positioning hole 105, and precision punches the carrier edge hole 108, improving the accuracy of the hole diameter and position; Precision punching side cutting edge hole station: Finalizes the outer dimension between two adjacent valve plates, ensuring that the overall shape of the valve plate meets the design requirements; Round hole chamfering station: Chamfers the valve plate positioning hole 105, suction hole 101, exhaust hole 103, and small hole 106, avoiding sharp edges and improving the use safety; Blanking station: Realizes the cutting and separation of the finished product, completing the entire stamping process. This stamping method greatly shortens the production cycle, improves production efficiency, and at the same time ensures the quality and precision of the valve plate through a multi-station continuous progressive method.

[0074] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application in turn. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A punching device, characterized in that: The invention comprises an upper die set (1), a lower die set (2) and a guide mechanism (3) for guiding the upper die set (1), wherein the upper die set (1) comprises an upper die plate (11), wherein the upper die plate (11) is provided with a punching hole punch (111), a pre-punching punch (112), a reverse denting upper die (113), a front denting lower die (114), a fine punching punch (115) and a blanking punch (116) in sequence along the advancing direction of the material strip; the lower die set (2) is provided with a concave die plate (21), wherein the concave die plate (21) and the upper die plate (11) are provided with a punching hole concave die (211), a pre-punching concave die (212), a reverse denting punch (213), a front denting lower die (214), a fine punching concave die (215) and a blanking concave die (216) in correspondence with each other; The front side embossing lower die (214) is provided with a profiling support convex portion (2141), the profiling support convex portion (2141) being matched with the embossing convex portion of the back side embossing convex die (213) and being used for precision embossing the embossing structure on the back side during embossing on the front side; The guide mechanism (3) comprises a plurality of symmetrically arranged outer guide components (31) for guiding the upper pressing die set (1), a plurality of symmetrically arranged inner guide components (32), and a plurality of guide pins (33) for positioning the material strip, wherein the guide pins (33) are fixedly mounted on the upper die plate (11); The sequence of the workstations is punching process holes, pre-punching, reverse side denting, front side denting, fine punching, chamfering and blanking.

2. The punching device according to claim 1, characterized in that: The pre-punching punch (112) comprises a pre-punching punch and a pre-cutting carrier side hole punch; the pre-punching punch comprises a pre-punching air suction hole punch, a pre-punching air exhaust hole punch and a pre-punching small hole punch; the pre-cutting carrier side hole punch is used to pre-cut the carrier side holes (108) connected to the two carriers (107); the pre-punching die (212) comprises a pre-punching die and a pre-cutting carrier side hole die; the pre-punching die comprises a pre-punching air suction hole die and a pre-punching air exhaust hole die corresponding to the pre-punching punch.

3. The punching device according to claim 1, characterized in that: The fine blanking punch (115) comprises a fine blanking small hole punch, a fine blanking valve plate positioning hole punch, a fine blanking air suction hole punch, a fine blanking exhaust hole punch, a fine blanking side hole punch and a fine blanking side hole punch; the fine blanking die (215) is provided with a fine blanking small hole die, a fine blanking valve plate positioning hole die, a fine blanking air suction hole die, a fine blanking exhaust hole die, a fine blanking side hole die and a fine blanking side hole die corresponding to the fine blanking punch (115).

4. The punching device according to claim 1, characterized in that: The lower pressing die assembly (2) further comprises a chamfering assembly (22), the chamfering assembly (22) comprising a fixed block (221) fixed on the lower pressing die assembly (2), a top material block (222) mounted on the fixed block (221), and a chamfering punch (223), a floating block top rod (224) being provided on a side of the top material block (222) close to the fixed block (221), one end of the floating block top rod (224) being in contact with the top material block (222), and the other end of the floating block top rod (224) being pressed against the lower pressing die assembly (2) by a top material spring (225).

5. The punching device according to claim 1, characterized in that: The upper die assembly (1) further comprises an upper cover plate (12), an upper die seat (13), an upper die pad (14), a discharge pad (15) and a discharge plate (16) which are arranged in sequence in a direction close to the lower die assembly (2); the upper die plate (11) is located between the upper die pad (14) and the discharge pad (15); the upper cover plate (12), the upper die seat (13), the upper die pad (14) and the upper die plate (11) are detachably fixedly connected; the upper die plate (11) and the discharge pad (15) are arranged at intervals; and the discharge plate (16) is connected to the upper die plate (11) via a discharge spring assembly (17).

6. The punching device according to claim 1, characterized in that: The lower pressing die assembly (2) further comprises a lower supporting plate (23), a lower padding foot (24), a lower die seat (25) and a lower die pad (26) which are arranged in sequence in a direction close to the upper pressing die assembly (1); the concave die plate (21) is located on a side of the lower die pad (26) close to the upper pressing die assembly (1); the lower supporting plate (23), the lower padding foot (24), the lower die seat (25), the lower die pad (26) and the concave die plate (21) are detachably fixedly connected.

7. The punching device according to claim 1, characterized in that: The outer guide assembly (31) comprises an outer guide column (311) mounted on the lower pressing die assembly (2) and an outer guide sleeve (312) mounted on the upper pressing die assembly (1), wherein the outer guide sleeve (312) is in sliding engagement with the outer guide column (311), and the inner guide assembly (32) comprises an inner guide column (321) mounted on the upper pressing die assembly (1) and an inner guide sleeve (322) mounted on the lower pressing die assembly (2), wherein the inner guide column (321) is in sliding engagement with the inner guide sleeve (322).

8. A stamping method, characterized in that: Based on the stamping device according to any one of claims 1 to 7, the material strip is intermittently and equidistantly conveyed and multi-station continuous progressive stamping is performed on the material strip, specifically comprising the following steps: S1. Punching hole station: used to punch out the material strip positioning hole (100) for positioning the material strip, the valve plate positioning hole (105) for positioning the valve plate, and the side hole (109) for connecting two adjacent valve plates; S2 pre-punching station: for pre-cutting the carrier edge holes (108) connected to the two carriers (107), pre-punching the suction holes (101), pre-punching the exhaust holes (103) and pre-punching the small holes (106); S3. Reverse side embossing station: for embossing the reverse side of the exhaust valve seat (104) preformed; S4. Front embossing station: used for embossing the front suction valve seat (102) and precision embossing the back exhaust valve seat (104); S5. Fine punching small hole station: used for fine punching small holes (106) and shaping the size of the small holes (106); S6. Fine-blanking valve hole station: used for fine-blanking suction holes (101), fine-blanking exhaust holes (103), fine-blanking valve plate positioning holes (105) and fine-blanking side holes (108); S7. Fine punching side hole station: used for fine punching the side hole (109) between two adjacent valve plates; S8. Circular hole chamfering station: used for chamfering the valve plate positioning hole (105), the air intake hole (101), the exhaust hole (103) and the small hole (106); S9. Blanking station: used to cut the blanks to obtain the finished stamping valve plate; In step S4, the concave structure on the reverse side is precision-pressed by the contoured support convex portion (2141), so that the front intake valve seat (102) and the rear exhaust valve seat (104) form an overlapping double concave structure.

Images