Stamping device and stamping method

Abstract

The invention discloses a stamping device and a stamping method, and relates to the technical field of valve plate stamping equipment.The stamping device comprises an upper pressing module, a lower pressing module and a guide mechanism, and the upper pressing module is sequentially provided with an auxiliary hole stamping male die, a pre-stamping male die, a reverse face pressing concave upper die, a front face pressing concave-convex die, a fine stamping male die and a blanking male die; the lower pressing module is provided with a corresponding female die, and structures such as a profiling supporting convex part and a chamfering assembly are additionally arranged. In addition, the upper pressing module and the lower pressing module further comprise various auxiliary components such as a discharging spring assembly and a guide needle, high-precision and stable continuous progressive stamping is guaranteed, efficient and accurate biconcave valve plate production is achieved through multi-station continuous machining, and product consistency and production efficiency are remarkably improved.

Description

Technical Field

[0001] The present application relates to the technical field of valve plate stamping equipment, and in particular 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 vital role. The valve plate not only needs to have good sealing performance, but also needs to be able to withstand high pressure and high temperature working environment. Modern high-performance compressors have higher requirements for valve plates, especially the increasing demand for double concave valve plates. The double concave valve plate has an exhaust valve seat on the back and an intake valve seat on the front, and the concave overlapping area structure of the two makes its precision processing more complicated. Therefore, it is particularly important to develop an efficient stamping device.

[0003] The existing double concave valve plate stamping dies are mainly processed by a single station or a combination of multiple stations. Among them, although the single-station mold is simple to operate, the production efficiency is low and it is difficult to meet the needs of large-scale production. Multi-station combination molds can improve production efficiency, but there are still some problems in practical applications. After completing the initial stamping, rough grinding, fine grinding and deburring are performed to achieve the final product requirements. Although this method can ensure product quality, due to the cumbersome process and the long overall production cycle, it leads to low production efficiency.

[0004] The main defect of the existing technology is that no matter it is a single-station or multi-station combination mold, it faces the problem of long production process and low work efficiency when processing double concave valve plates. Especially in the application of multi-station combination molds, frequent mold changes and complex post-processing procedures seriously restrict the improvement of production efficiency. How to provide a stamping mold and stamping method with short valve plate production process and high efficiency is a technical problem that technicians in this field need to solve at present. Summary of the invention

[0005] In order to help improve the stamping efficiency of a double concave valve plate, the present application provides a stamping device and a stamping method.

[0006] In a first aspect, the present application provides a stamping device, which adopts the following technical solution: A stamping device comprises an upper die set, a lower die set and a guiding mechanism for guiding the upper die set, wherein the upper die set comprises an upper template, and the upper template is provided with a punching hole punch, a pre-punching punch, a reverse embossing upper die, a front embossing punch, a fine-punching punch and a blanking punch in sequence along the advancing direction of the material strip; the lower die set is provided with a concave template, and the concave template and the upper template are provided with a punching hole die, a pre-punching die, a reverse embossing upper die, a front embossing lower die, a fine-punching die and a blanking die in correspondence.

[0007] By adopting the above technical solution, the valve plate is subjected to multi-station continuous progressive stamping, which reduces the multiple transfers and processing steps in the traditional process, significantly shortens the production cycle, and improves the overall production efficiency; each station is responsible for different stamping operations, ensuring that each link can be precisely controlled, and the design of the guide mechanism ensures the stability and accuracy of the upper pressing die set during movement, especially the coordinated use of the reverse side concave upper die and the front side concave convex die, which effectively forms a double concave structure and improves the overall processing quality and consistency of the valve plate; the entire device integrates a variety of functional modules, from punching process holes, pre-punching, reverse side concave, front side concave, fine punching and blanking, so that the originally complex process can be completed in one mold, greatly simplifying the production process.

[0008] Optionally, a contoured support convex portion is provided on the front embossing lower die, and the contoured support convex portion is matched with the embossing convex portion of the reverse embossing convex die.

[0009] By adopting the above technical scheme, the reverse side embossing punch and die embosses the reverse side to preliminarily form the exhaust valve seat, and removes part of the material in the exhaust valve seat. When the front side embossing punch and die embosses the front side, the exhaust valve seat that has been previously embossed on the reverse side is precision-embossed by means of the contoured supporting convex portion, and a double concave size of the front and reverse sides is formed, thereby improving the quality of the stamped valve plate and the efficiency of stamping.

[0010] Optionally, the pre-punching punch includes a pre-punching punch and a pre-cutting side hole punch; the pre-punching punch includes a pre-punching suction hole punch, a pre-punching exhaust hole punch and a pre-punching small hole punch, the pre-cutting side hole punch is used to pre-cut the side holes connected to the two carriers, the pre-punching die includes a pre-punching die and a pre-cutting side hole die, the pre-punching die includes a pre-punching suction hole die and a pre-punching exhaust hole die corresponding to the pre-punching punch.

[0011] By adopting the above technical scheme, the setting of the pre-punching punch and the pre-cut side hole punch can effectively improve the accuracy and efficiency of the subsequent processes. The pre-punching punch can pre-form the basic shape of the suction hole and the exhaust hole, providing space for the material flow during the subsequent forming process. The pre-cut side hole punch and the pre-cut side hole die can perform preliminary cutting on the product shape in the early stage, providing space for the material flow during the subsequent forming process, which helps to ensure the accuracy of the valve plate stamping forming.

[0012] Optionally, the fine blanking punch includes a fine blanking small hole punch, a fine blanking valve plate positioning hole punch, a fine blanking suction hole punch, a fine blanking exhaust hole punch, a fine blanking side hole punch and a fine blanking side hole punch, and the fine blanking die is provided with a fine blanking small hole die, a fine blanking valve plate positioning hole die, a fine blanking 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.

[0013] By adopting the above technical solution, the setting of fine blanking punch and fine blanking die can realize the precise forming of valve plate. Specifically, the fine blanking suction hole punch and fine blanking suction hole die, fine blanking exhaust hole punch and fine blanking exhaust hole die, respectively realize the precise stamping of suction hole and exhaust hole, ensuring the accuracy of hole diameter and position; the fine blanking side hole punch and fine blanking side hole punch, together with the fine blanking side hole die and fine blanking side hole die, are stamped to finely cut the shape of valve plate, so that it reaches the final required size and shape, improving the overall processing quality and production efficiency of valve plate.

[0014] Optionally, the lower pressure die set also includes a chamfering assembly, which includes a fixed block fixed on the lower pressure die set, a lifting block installed on the fixed block and a chamfering punch, and a floating block push rod is provided on the side of the lifting block close to the fixed block, one end of the floating block push rod abuts against the lifting block, and the other end is pressed against the lower pressure die set by a lifting spring.

[0015] By adopting the above technical solution, the setting of the chamfering assembly enables the valve plate to be chamfered for circular holes after stamping is completed, avoiding the subsequent separate chamfering process, improving production efficiency and product quality. The design of the floating block ejector rod and the ejector spring ensures the stability and reliability of the ejector block during operation, and helps to separate the material strip from the chamfering punch in a timely manner.

[0016] Optionally, the upper die group also includes an upper cover plate, an upper die seat, an upper die pad, a unloading pad and a unloading plate which are arranged in sequence towards the direction close to the lower die group, the upper template is located between the upper die pad and the unloading pad, the upper cover plate, the upper die seat, the upper die pad and the upper template are detachably fixedly connected, the upper template is spaced apart from the unloading pad, and the unloading plate is connected to the upper template via a unloading spring assembly.

[0017] By adopting the above technical solution, a stable structure is formed between the various components of the upper die set, ensuring the accuracy and stability during the stamping process. The detachable fixed connection design between the upper cover plate, the upper die seat, the upper die pad and the upper die plate facilitates the maintenance and adjustment of each module, improving production flexibility. The interval setting between the upper die plate and the unloading pad, and the unloading plate is connected to the upper die plate through the unloading spring assembly, so that the upper die plate can be quickly reset after each stamping is completed, effectively preventing the upper die plate from sticking to the material belt and improving production efficiency.

[0018] Optionally, the lower die assembly further comprises a lower supporting plate, a lower pad, a lower die base and a lower die pad which are sequentially arranged in a direction close to the upper die assembly, and the concave die plate is located on a side of the lower die pad close to the upper die assembly, and the lower supporting plate, the lower pad, the lower die base, the lower die pad and the concave die plate are detachably fixedly connected.

[0019] By adopting the above technical solution, the structural design of each part of the lower pressing die set is reasonable and well-organized, which can effectively improve the overall stability and service life of the die. Specifically: the design of the lower support plate, lower pad, lower die seat and lower die pad makes the entire lower pressing die set structure more stable, improving the accuracy and reliability of the stamping process; the detachable fixed connection between the various components facilitates maintenance and adjustment, reducing maintenance costs and time.

[0020] Optionally, the guiding mechanism includes a plurality of symmetrically arranged outer guide components for guiding the upper pressing die set, a plurality of symmetrically arranged inner guide components, and a plurality of guide pins for positioning the material strip, and the guide pins are fixedly mounted on the upper template.

[0021] By adopting the above technical solution, multiple symmetrically arranged outer guide components and inner guide components can ensure the precise alignment of the upper pressing die set during the up and down movement, effectively avoiding the offset or misalignment between the upper pressing die set and the lower pressing die set, thereby improving the stamping accuracy and stability. At the same time, the setting of the guide pin can realize the precise positioning of the material strip, ensuring the accurate position of the material at each station, further improving the consistency and yield rate of the product.

[0022] Optionally, the outer guide assembly includes an outer guide pin installed on the lower pressure die group and an outer guide sleeve installed on the upper pressure die group, the outer guide pin passes through the outer guide sleeve and slides with the outer guide sleeve, and the inner guide assembly includes an inner guide pin installed on the upper pressure die group and an inner guide sleeve installed on the lower pressure die group, when the upper pressure die group and the lower pressure die are combined, the inner guide pin passes through the inner guide sleeve and slides with the inner guide sleeve.

[0023] By adopting the above technical solution, the setting of the outer guide assembly and the inner guide assembly ensures the precise guidance of the upper pressing die set during the movement, avoiding product quality problems caused by offset during the stamping process. The sliding cooperation between the outer guide pin and the outer guide sleeve, and the inner guide pin and the inner guide sleeve enables the upper pressing die set to move up and down stably, ensuring the stamping accuracy and consistency of each station, and improving the stamping efficiency and product quality.

[0024] In a second aspect, the present application provides a stamping method, which adopts the following technical solution: A stamping method, based on the above-mentioned stamping device, intermittently and equidistantly conveys the material strip and performs multi-station continuous progressive stamping on the material strip, specifically comprising the following steps: S1. Punching process hole station: used to punch out the material strip positioning hole for positioning the material strip, the valve plate positioning hole for positioning the valve plate, and the side hole for connecting two adjacent valve plates; S2. Pre-punching station: used to pre-cut the carrier edge holes connected to the two carriers, pre-punch the suction holes, pre-punch the exhaust holes and pre-punch the small holes; S3. Reverse side denting station: used to dent the exhaust valve seat on the reverse side of the preformed part; S4. Front embossing station: used for embossing the front suction valve seat and precision embossing the back exhaust valve seat; S5. Fine punching small hole station: used for fine punching small holes and shaping the size of the small holes; S6. Fine punching valve hole station: used for fine punching suction holes, fine punching exhaust holes, fine punching valve plate positioning holes and fine punching side holes; S7. Fine punching side hole station: used for fine punching the side hole between two adjacent valve plates; S8. Round hole chamfering station: used to chamfer the valve plate positioning hole, air intake hole, exhaust hole and small hole; S9. Blanking station: used to cut the blanks to obtain the finished stamped valve plate.

[0025] By adopting the above technical solution, multi-station continuous progressive stamping of double-concave valve plates is realized, the production process is simplified, the turnover time between processes is reduced, and production efficiency is improved. Specifically: Punching process hole station: ensures the accurate positioning of subsequent processes, and also reserves space for material flow, ensuring the smooth progress of subsequent stamping and forming. Pre-punching station: cut the product shape edge and pre-punch holes in advance to reserve space for the material flow generated by the subsequent stamping process; reverse side embossing station: effectively remove part of the material in the exhaust valve seat, providing a basis for subsequent front side embossing and improving product quality; front side embossing station: the reverse side is fine-pressed by the contoured support convex part, so that the front and reverse sides simultaneously form precise double concave dimensions, which significantly improves the stamping accuracy and efficiency; fine-punching small hole station: accurately size the small hole to ensure the dimensional consistency of the final product; fine-punching valve hole station: further fine-punch the suction hole, fine-punch the exhaust hole, fine-punch the valve hole, and fine-punch the valve hole. The valve plate positioning holes and fine-punching edge holes improve the accuracy of the hole diameter and position; the fine-punching side trimming station: the final shaping of the external dimensions between two adjacent valve plates ensures that the overall shape of the valve plate meets the design requirements; the circular hole chamfering station: the valve plate positioning holes, air intake holes, exhaust holes and small holes are chamfered to avoid sharp edges and improve safety in use; the blanking station: the cutting and separation of the finished product is achieved, completing the entire stamping process. This stamping method greatly shortens the production cycle and improves production efficiency through multi-station continuous progressive mode, while ensuring the quality and accuracy of the valve plate.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the multi-station continuous progressive stamping method, the whole process from process hole to final blanking is automated, which significantly shortens the production process and improves production efficiency; 2. The profiling support convex part is matched with the reverse concave and convex die to ensure the accurate forming of the double concave dimensions of the front and reverse sides, thus improving the consistency of the valve plate and the product quality; 3. Combining multiple stamping steps such as pre-punching, fine-punching and round chamfering reduces subsequent grinding and deburring processes, further simplifies the production process, and reduces labor intensity and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A reverse view of a valve plate stamped according to an embodiment of the present application; Figure 2 A front view of a valve plate stamped according to an embodiment of the present application; Figure 3 A front view of a punching device disclosed in the present application; Figure 4 for Figure 3 The A-direction view in the figure is used to show the contoured support convex part; Figure 5 A top view of the pressing die assembly disclosed in this application; Figure 6 A side view of a punching device disclosed in the present application; Figure 7 A material strip diagram of a stamping method disclosed in this application; Figure 8 for Figure 7 A partial enlarged view of the middle I position.

[0028] Description of reference numerals: 1. Upper pressing die set; 11. Upper template; 111. Punch die for punching process holes; 112. Pre-punch die; 113. Upper die for back-side concave pressing; 114. Punch die for front-side concave pressing; 115. Punch die for fine blanking; 116. Punch die for blanking; 12. Upper cover plate; 13. Upper die seat; 14. Upper die pad; 15. Discharge pad; 16. Discharge plate; 17. Discharge spring assembly; 171. Discharge spring; 172. Fixing screw; 2. Lower pressing die set; 21. Concave template; 211. Concave die for punching process holes; 212. Pre-punch die; 213. Concave die for back-side pressing; 214. Lower die for front-side pressing; 2141. Profiling support convex part; 215. Fine blanking die; 216. Blanking die; 2 2. Chamfering assembly; 221. Fixed block; 222. Ejecting block; 223. Chamfering punch; 224. Floating block ejector rod; 225. Ejecting spring; 23. Lower support plate; 24. Lower pad; 25. Lower die seat; 26. Lower die pad; 3. Guide mechanism; 31. External guide assembly; 311. External guide post; 312. External guide sleeve; 32. Internal guide assembly; 321. Internal guide post; 322. Internal guide sleeve; 33. Guide pin; 100. Material strip positioning hole; 101. Intake hole; 102. Intake 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 DESCRIPTION

[0029] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 to obtain other embodiments without creative work, 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 embodiment of the present application is provided with an intake valve seat 102 on the front side and an exhaust valve seat 104 on the back side. The exhaust seat and the intake valve seat 102 have overlapping areas on the back side and the front side. There are also multiple valve plate positioning holes 105, multiple small holes 106, intake holes 101 and exhaust holes 103 that penetrate the valve plate.

[0030] The embodiment of the present application discloses a stamping device.

[0031] A punching device. Figure 3, including an upper pressing die set 1, a lower pressing die set 2 and a guiding mechanism 3, the upper pressing die set 1 is installed on the upper pressing head of the press, and the lower pressing die set 2 is installed on the base of the press, and the upper pressing die set 1 is driven by the upper pressing head to punch and form the material strip on the lower pressing die set 2, and the guiding mechanism 3 is used to guide the upper pressing die set 1 to improve the repetitive accuracy of the upper pressing die set 1 in punching the material strip, and the upper pressing die set 1 includes an upper template 11, and the upper template 11 is provided with a punching hole punch 111, a pre-punching punch 112, a reverse concave upper die 113, a front concave punch 114, a fine punch 115 and a blanking punch 116 in sequence along the advancing direction of the material strip; the lower pressing die set 2 is provided with a concave template 21, and the concave template 21 is provided with a punching hole concave die 211, a pre-punching concave die 212, a reverse concave punch 213, a front concave lower die 116 corresponding to the upper template 11 Die 214, fine blanking die 215 and blanking die 216; the stamping die device performs multi-station continuous progressive stamping on the valve plate, which reduces the multiple transfers and processing steps in the traditional process, significantly shortens the production cycle, and improves the overall production efficiency; each station is responsible for different stamping operations to ensure that each link can be accurately controlled, and the design of the guide mechanism 3 ensures the stability and guiding accuracy of the upper pressing die set 1 during movement. The coordinated use of the reverse side concave upper die 113 and the front side concave convex die 114 effectively forms a double concave structure, which improves the overall processing quality and consistency of the valve plate; the entire device integrates a variety of functional modules, from punching process holes, pre-punching, reverse side concave, front side concave, fine blanking and blanking, so that the originally complex processes can be completed in one mold, which greatly simplifies the production process.

[0032] Reference Figure 4 The front side embossing die 214 is provided with a contoured supporting convex portion 2141, which is matched with the embossing convex portion of the rear side embossing die 213. The rear side embossing die 213 embosses the rear side to preliminarily form the exhaust valve seat 104, and removes part of the material in the exhaust valve seat 104. When the front side embossing die 114 embosses the front side, the contoured supporting convex portion 2141 is used to perform precision embossing on the exhaust valve seat 104 that has been previously embossed on the rear side, so as to form the front side intake valve seat 102 and the rear side exhaust valve seat 104, thereby improving the quality of the stamped valve plate and the efficiency of stamping.

[0033] Reference Figure 3The pre-punching punch 112 includes a pre-punching punch and a pre-cutting carrier side hole punch; the pre-punching punch includes a pre-punching suction hole punch, a pre-punching exhaust hole punch and a pre-punching small hole punch, and the pre-cutting carrier side hole punch is used to pre-cut the carrier side hole 108 connected to the two carriers 107, and the pre-punching die 212 includes a pre-punching die and a pre-cutting carrier side hole die, and the pre-punching die includes a pre-punching suction hole die and a pre-punching exhaust hole die corresponding to the pre-punching punch; specifically, the pre-punching punch and the pre-cutting carrier side hole die are provided with a pre-punching suction hole die and a pre-punching exhaust hole die; The setting of the hole punch can effectively improve the accuracy and efficiency of the subsequent process. The pre-punching punch and the pre-punching die can be used for stamping together to pre-form the basic shapes of the suction hole 101 and the exhaust hole 103, providing space for the material flow during the subsequent molding process. The pre-cut side hole punch and the pre-cut side hole die can be used for stamping together to make preliminary cutting of the product shape at an early stage, providing space for the material flow during the subsequent molding process, which helps to ensure the accuracy of valve plate stamping.

[0034] Reference 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 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 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; the arrangement of the fine blanking punch 115 and the fine blanking die 215 can improve the precise forming of the valve plate. Specifically, the fine punching suction hole punch and fine punching suction hole die, the fine punching exhaust hole punch and fine punching exhaust hole die, respectively realize the precise stamping of the suction hole 101 and the exhaust hole 103, ensuring the accuracy of the hole diameter and position; the fine punching side hole punch and the fine punching side hole punch are stamped relative to the fine punching side hole die and the fine punching side hole die, and the valve plate shape is finely cut to achieve the final required size and shape, thereby improving the production efficiency and overall processing quality of the valve plate.

[0035] Reference Figure 3The lower pressing die set 2 also includes a chamfering assembly 22, which includes a fixed block 221 fixed on the lower pressing die set 2, a lifting block 222 installed on the fixed block 221, and a chamfering punch 223. A floating block push rod 224 is provided on the side of the lifting block 222 close to the fixed block 221, and one end of the floating block push rod 224 abuts against the lifting block 222, and the other end is pressed against the lower pressing die set 2 by a lifting spring 225. The number of floating block push rods 224 in the embodiment of the present application is 14, which are symmetrically arranged on both sides of the material strip. The setting of the chamfering assembly 22 enables the valve plate to be chamfered for circular holes after stamping is completed, avoiding the subsequent separate chamfering process, thereby improving the production efficiency and the processing quality of the valve plate. The design of the floating block push rod 224 and the lifting spring 225 ensures the stability and reliability of the lifting block 222 during operation, which helps to separate the material strip from the chamfering punch 223 in time.

[0036] Reference Figure 3 , Figure 5 and Figure 6 The upper die assembly 1 further includes 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 sequentially arranged 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 detachable structure is fixed by screws. The upper die plate 11 is spaced apart from the discharge pad 15. The discharge plate 16 is connected to the upper die plate 11 through a discharge spring assembly 17. The discharge spring assembly 1 7 comprises a discharge spring 171 and a fixing screw 172, the shoulder end of the fixing screw 172 is mounted on the upper die pad 14, the thread end of the fixing screw 172 is threadedly fixed to the upper die plate 11, one end of the discharge spring 171 abuts against the shoulder end of the fixing screw 172, and the other end abuts against the upper cover plate 12, so that when discharging, the discharge plate 16 is pressed by the discharge spring 171 to separate the material strip from the punch on the upper die plate 11, and a stable structure is formed between the various components of the upper die assembly 1, 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 pad 14 and the upper die plate 11 facilitates maintenance and adjustment of each module and improves production flexibility. The upper die plate 11 and the unloading pad 15 are spaced apart, and the unloading plate 16 is connected to the upper die plate 11 through the unloading spring assembly 17, so that the upper die plate 11 can be quickly reset after each stamping is completed, effectively preventing the upper die plate 11 from sticking to the material strip and improving production efficiency.

[0037] Reference Figure 3 and Figure 6The lower pressing die set 2 also includes a lower supporting plate 23, a lower pad 24, a lower die seat 25 and a lower die pad 26 which are arranged in sequence toward the direction close to the upper pressing die set 1. The concave die plate 21 is located on the side of the lower die pad 26 close to the upper pressing die set 1. The lower supporting plate 23, the lower pad 24, the lower die seat 25, the lower die pad 26 and the concave die plate 21 are detachably fixedly connected; the detachable fixing structure is fixedly connected by screws, and the structural design of each part of the lower pressing die set 2 is reasonable and the layers are clear, which can effectively improve the overall stability and service life of the mold; the design of the lower supporting plate 23, the lower pad 24, the lower die seat 25 and the lower die pad 26 makes the structure of the entire lower pressing die set 2 more stable, and improves the accuracy and reliability of the stamping process; the detachable fixed connection method between the components is convenient for maintenance and adjustment, and reduces the maintenance cost and time.

[0038] Reference Figure 5 and Figure 6 The guide mechanism 3 includes a plurality of symmetrically arranged outer guide components 31 for guiding the upper die set 1, a plurality of symmetrically arranged inner guide components 32, and a plurality of guide pins 33 for positioning the material strip, and the guide pins 33 are fixedly mounted on the upper template 11; the number of the outer guide components 31 in the embodiment of the present application is 4, the number of the inner guide components 32 is 6, and the number of the guide pins 33 is 20. Other embodiments of the present application may also be other numbers of outer guide components 31, inner guide components 32, and guide pins 33; the 4 symmetrically arranged outer guide components 31 and the 6 inner guide components 32 can ensure the precise alignment of the upper die set 1 during the up and down movement, effectively avoiding the offset or misalignment between the upper die set 1 and the lower die set 2, thereby improving the stamping accuracy and stability. At the same time, the setting of 20 guide pins 33 can realize the precise positioning of the material strip, ensure the accurate position of the material at each station, and further improve the consistency and yield rate of the product.

[0039] Reference Figure 6 The outer guide assembly 31 includes an outer guide column 311 installed on the lower die set 2 and an outer guide sleeve 312 installed on the upper die set 1. The outer guide column 311 is provided with the outer guide sleeve 312 and slides with the outer guide sleeve. The inner guide assembly 32 includes an inner guide column 321 installed on the upper die set 1 and an inner guide sleeve 322 installed on the lower die set 2. When the upper die set 1 and the lower die set 2 are molded together, the inner guide column 321 is provided with the inner guide sleeve 322 and slides with the inner guide sleeve 322. The arrangement of the outer guide assembly 31 and the inner guide assembly 32 ensures the precise guidance of the upper die set 1 during the movement, and avoids product quality problems caused by offset during the stamping process. The sliding cooperation between the outer guide column 311 and the outer guide sleeve 312, and the inner guide column 321 and the inner guide sleeve 322 enables the upper die set 1 to move up and down stably, ensuring the stamping accuracy and consistency of each station, and improving the stamping efficiency and product quality.

[0040] The embodiment of the present application also discloses a stamping method.

[0041] A stamping method, referring to Figure 7 and Figure 8 Based on the above-mentioned stamping device, the material strip is intermittently and equidistantly conveyed and multi-station continuous progressive stamping is performed on the material strip, which specifically includes 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 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. Positive embossing station: used for embossing the positive suction valve seat 102 and the reverse exhaust valve seat 104; S5. Fine punching station 106: used for fine punching the small hole 106 and shaping the size of the small hole 106; S6. Fine punching valve hole station: for fine punching suction hole 101, fine punching exhaust hole 103, fine punching valve plate positioning hole 105 and fine punching edge hole 108; S7. Fine punching side hole 109 station: used for fine punching side hole 109 between two adjacent valve plates; S8. Circular hole chamfering station: used to chamfer 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 stamped valve plate.

[0042] 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, reduces the turnaround time between processes, and improves production efficiency. Specifically: Punching process hole station: ensures accurate positioning of subsequent processes, and also reserves space for material flow, ensuring the smooth progress of subsequent stamping and forming; Pre-punching station: cuts the product shape edge and pre-punches holes in advance, reserving space for the material flow generated by the subsequent stamping process; Rear side embossing station: effectively removes part of the material inside the exhaust valve seat 104, providing a basis for subsequent front side embossing; Front side embossing station: fine-presses the exhaust valve seat 104 that has been previously embossed on the reverse side through the contoured support convex portion 2141, so that the front suction valve seat 102 and the reverse exhaust valve seat 104 simultaneously form precise double-concave dimensions, significantly improving stamping accuracy and efficiency; Fine punching small hole station: accurately sizes the small hole 106 to ensure the size of the final product Consistency; Fine punching valve hole station: further fine punching the suction hole 101, fine punching the exhaust hole 103, fine punching the valve plate positioning hole 105 and fine punching the edge hole 108, which improves the accuracy of the aperture and position; Fine punching side trimming hole station: finalize the external dimensions between two adjacent valve plates to ensure that the overall shape of the valve plate meets the design requirements; Round hole chamfering station: chamfer the valve plate positioning hole 105, the suction hole 101, the exhaust hole 103 and the small hole 106 to avoid sharp edges and improve safety in use; Blanking station: realize the cutting and separation of the finished product and complete the entire stamping process. This stamping method greatly shortens the production cycle and improves production efficiency through multi-station continuous progressive mode, while ensuring the quality and accuracy of the valve plate.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application in sequence. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A punching device, characterized in that: The invention comprises an upper pressing die set (1), a lower pressing die set (2) and a guiding mechanism (3) for guiding the upper pressing die set (1), wherein the upper pressing 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 side concave upper die (113), a front side concave lower die (114), a fine punching punch (115) and a blanking punch (116) in sequence along the advancing direction of the material strip; and the lower pressing die set (21) 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 side concave punch (213), a front side concave lower die (214), a fine punching concave die (215) and a blanking concave die (216) in correspondence with each other.

2. The punching device according to claim 1, characterized in that: The front-side embossing lower die (214) is provided with a contoured support convex portion (2141), and the contoured support convex portion (2141) is arranged to match the embossing convex portion of the rear-side embossing convex die (213).

3. 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.

4. 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).

5. 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).

6. 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).

7. 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.

8. The punching device according to claim 1, characterized in that: 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).

9. The punching device according to claim 8, 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).

10. A stamping method, characterized in that: Based on the stamping device according to any one of claims 1 to 9, 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 stamped valve plate.

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