Stamping die for producing and machining valve gasket

Abstract

The invention discloses a stamping die for producing and machining a valve gasket, relates to the technical field of gasket stamping, and aims to solve the technical problems that the production process is tedious and the production efficiency is low due to the fact that secondary treatment needs to be conducted on the gasket when the gasket is uneven and burrs are generated. An inner hole punch, a gasket punch and a material taking punch are connected to the bottom of the upper die, an inner hole punching groove, a gasket punching groove and a material taking groove are formed in the top of the lower die, the gasket punching groove is communicated with the material taking groove through a transition groove, a grinding groove is formed below the material taking groove, and a gasket shape correcting assembly is arranged in an inner cavity of the lower die. The gasket shape correcting assembly comprises a pressing table, a pushing assembly, a clamping and grinding assembly, a feeding guide assembly and a curved surface grinding assembly. The gasket blank can be subjected to flatness correction and burr removal in the mold in sequence and is finally taken out, the transferring and waiting time between procedures is shortened, and the production efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gasket stamping, and more specifically, to a stamping die for the production and processing of valve gaskets. Background Art

[0002] In the production and processing of valve gaskets, the stamping die is a crucial piece of equipment. It usually consists of an upper die and a lower die. By applying pressure through equipment such as a press, the metal sheet is stamped into shape within the die cavity to obtain a valve gasket with the required shape and size. However, traditional valve gasket stamping dies have many problems in practical applications. On the one hand, the gasket blanks after stamping often have poor flatness, which is caused by factors such as uneven stress on the metal sheet raw material during the stamping process. The unevenness of the gasket will seriously affect its sealing performance in the valve, reducing the overall quality and reliability of the valve. On the other hand, a large number of burrs will be generated on the surface of the gasket blank during the stamping process. These burrs not only affect the appearance quality of the gasket but may also cause harm to the operators during the subsequent assembly process and will interfere with the tight fit between the gasket and other components of the valve, further affecting the sealing effect of the valve.

[0003] Traditional stamping dies usually use sharper and more wear-resistant die edge materials to improve the processing accuracy and surface quality of the die edge, making the separation of materials during stamping cleaner and reducing the generation of burrs. However, during the long-term use of the die, it is inevitable to become dull, and it is still difficult to avoid the unevenness of the gasket and the generation of burrs. This leads to the need for subsequent flatness and deburring treatment of the gasket through manual or automated equipment after stamping, resulting in cumbersome production and low production efficiency. In view of this, we propose a stamping die for the production and processing of valve gaskets. Summary of the Invention

[0004] The purpose of the present invention is to provide a stamping die for the production and processing of valve gaskets to solve the technical problems that during the long-term use of the die, it is easy to become dull, it is difficult to avoid the unevenness of the gasket and the generation of burrs, and secondary treatment of the gasket is required, resulting in a cumbersome production process and low production efficiency.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a stamping die for the production and processing of valve gaskets, comprising a stamping machine, the stamping machine comprising an upper die, a lower die and a base; the bottom of the upper die is connected with an inner hole punch, a gasket punch and a material removal punch; the top of the lower die is provided with an inner hole groove, a gasket groove and a material removal groove; the gasket groove and the material removal groove are connected through a transition groove, one side of the gasket groove is connected with a push groove, and a grinding groove is provided below the material removal groove; a gasket correction component is arranged in the inner cavity of the lower die, and the gasket correction component is used to correct the flatness and remove burrs of the stamped gasket blank; the gasket correction component includes a press table arranged below the gasket groove, a push groove component arranged in the push groove, a clamping and grinding component arranged in the transition groove, and a feed guide component and a curved surface grinding component arranged in the grinding groove.

[0006] Preferably, the upper mold is arranged at the output end of the punching drive assembly of the punching machine, the base is arranged below the upper mold, a mold groove is opened on the top of the base, and the lower mold is installed in the mold groove.

[0007] Preferably, the inner hole punch and the gasket punch are arranged linearly in the output direction of the metal plate raw material, a clearance groove and an annular groove are provided at the bottom of the material taking punch, an annular magnet is arranged in the annular groove, and a guide head is connected to the bottom of the gasket punch; a waste output channel is connected to the bottom of the inner hole punch groove, and the waste output channel is used to discharge the inner hole waste; an external hole is provided at the bottom of the press table.

[0008] Preferably, the grinding clamping assembly includes an N-shaped frame, the bottom of the N-shaped frame is connected to a lower grinding plate arranged at the bottom of the transition groove, the inner side wall of the N-shaped frame is connected to a plurality of support plates, the bottom of the support plate is connected to an upper grinding plate via a plurality of springs, and one end of the upper grinding plate is a circular arc raised plate-like structure.

[0009] Preferably, the feed guide assembly includes a hydraulic cylinder 2 installed on the top of the grinding groove and two symmetrically arranged guide plates, the guide plate side walls are provided with sliding ridges, the guide plates are sleeved with feed guide plates, the inner side walls of the feed guide plates are provided with sliding grooves, the feed guide plates slide and cooperate with the sliding ridges through the sliding grooves, and the side walls of the feed guide plates are integrally formed with a rack 1; a driving block is connected to the bottom of one of the feed guide plates, and the output end of the hydraulic cylinder 2 is connected to the side wall of the driving block; the rack 1 is meshingly connected with a gear, and the gear is rotatably arranged at the top of the grinding groove, and the two feed guide plates cooperate through gear transmission.

[0010] Preferably, the curved surface grinding assembly is arranged below the feeding guide assembly. The curved surface grinding assembly includes a fixed ring frame connected to the inner top of the grinding groove. An operating substrate is rotatably arranged on the top of the fixed ring frame. The bottom of the operating substrate is bolted to an equipment cylinder. The bottom of the equipment cylinder is rotatably arranged on the inner bottom of the grinding groove. A fixed frame is also arranged on the inner bottom of the grinding groove. A hydraulic cylinder III is arranged on the top of the fixed frame. A second rack is slidably arranged on the top of the fixed frame. The output end of the hydraulic cylinder III is connected to the second rack. Tooth openings are arranged on the circumferential outer wall of the equipment cylinder. The second rack is meshed with the tooth openings.

[0011] Preferably, a motor is arranged in the inner cavity of the equipment cylinder. A plurality of activity grooves arranged in an annular array are opened at the top of the equipment cylinder; the output end of the motor is connected to a rotating plate. A plurality of inner arc grooves, a plurality of middle arc grooves and a plurality of outer arc grooves are opened at the top of the rotating plate; the fixed ring frame includes a fixed curved plate connected to the inner top of the grinding groove. A circular frame is connected to the inner side wall of the fixed curved plate. A wheel track is arranged on the top of the circular frame. The inner circumferential wall of the circular frame is connected with a support platform through a plurality of support rods. The top of the support platform is connected with a clamping ring through a plurality of support plates; the support rods are movably arranged in the activity grooves. The support plates are movably arranged in the middle arc grooves. The rotating plate is movably arranged between the clamping ring and the support platform.

[0012] Preferably, the side wall of the operating substrate is rotatably arranged on the wheel track on the top of the circular frame through a plurality of rollers. A plurality of inner grooves, a plurality of activity arc grooves and a plurality of outer grooves are opened from top to bottom on the operating substrate. A guiding block is connected to the top of the operating substrate. The support plates are movably arranged in the activity arc grooves. The operating substrate is movably arranged between the clamping ring and the rotating plate. The axial center position of the top of the rotating plate is rotationally connected to the axial center position of the bottom of the operating substrate through a bearing; a first positioning block is slidably arranged in the inner groove. A second positioning block is slidably arranged in the outer groove; the bottom of the first positioning block is connected to a first driving column. The first driving column is movably arranged in the inner arc groove. The upper end of the side wall of the first positioning block is provided with an inner arc grinding plate; the bottom of the second positioning block is connected to a second driving column. The second driving column is movably arranged in the outer arc groove. The upper end of the side wall of the second positioning block is provided with an outer arc grinding plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By arranging a gasket straightening assembly in the inner cavity of the lower die, the present invention integrates stamping, straightening, grinding and blank taking into a set of dies. The gasket blank formed by stamping is sequentially subjected to flatness correction and burr removal in the die and finally taken out, which reduces the transfer and waiting time between processes and greatly improves the production efficiency, and solves the problem that after traditional dies complete stamping, the gasket blank needs to be separately subjected to processes such as straightening and grinding, and the processes are cumbersome and time-consuming.

[0014] 2. After the stamping is completed by using the gasket punch in the present invention, the continuous downward punching movement can drive the gasket blank to continuously descend onto the pressing table. The gasket punch cooperates with the pressing table to flatten the gasket blank, realizing the correction of the flatness of the gasket blank, effectively solving the problem of poor flatness of the gasket after forming by traditional stamping dies, improving the quality of the valve gasket, avoiding the subsequent separate flatness correction process, and reducing the complexity of the production process.

[0015] 3. In the present invention, when the gasket punch punches downward on the metal plate raw material to form the gasket blank, the air in the gasket punching groove will be compressed to generate air pressure. At this time, the external hole opened at the bottom of the pressing table plays a role in discharging this part of the air pressure to prevent the air pressure from interfering with the stamping process, ensuring the stability and reliability of the stamping operation. At the same time, during the stamping process, the guiding head at the bottom of the gasket punch will insert into the inner hole of the gasket blank to provide precise guidance for the gasket blank during stamping to ensure its accurate position. As the gasket punch presses downward, it drives the gasket blank to descend onto the pressing table, and the guiding head enters the external hole. The external hole provides enough downward space for the guiding head, enabling the gasket punch to cooperate with the pressing table to apply uniform pressure to the gasket blank, flatten it, and ensure that it is evenly stressed during the flattening process, significantly improving the flatness of the gasket blank, enhancing the product quality of the valve gasket, and strengthening the sealing performance and reliability of the product in actual use.

[0016] 4. The present invention designs a clamping and grinding component and a curved surface grinding component. The flattened gasket blank is pushed forward by the pushing component. When the gasket blank passes through the transition groove, the clamping and grinding component grinds its upper and lower surfaces to remove the burrs on the upper and lower surfaces. The gasket blank continues to move forward and enters the curved surface grinding component from the material taking groove. The curved surface grinding component grinds its inner and outer side walls to further remove the burrs on the inner and outer side walls, enabling the clamping and grinding component and the curved surface grinding component to grind the upper and lower surfaces, inner and outer side walls of the gasket blank respectively, realizing the all-round grinding of the appearance of the gasket blank, effectively removing various burrs generated during the stamping process, and further improving the product quality.

[0017] 5. Through the synchronous expansion movement of the four positioning blocks 1, the present invention enables them to gradually contact the inner circumferential wall of the gasket blank, forming a positioning effect on the gasket blank, keeping the gasket blank centered on the top of the clamping ring. Then, through the downward pressure of the upper die, the material taking punch is driven to press down on the top of the gasket blank. The material taking punch and the clamping ring cooperate to clamp and fix the gasket blank, ensuring the stable position of the gasket blank during grinding. Then, through a small reciprocating rotation of the equipment cylinder, the inner arc grinding plates at the upper ends of the side walls of the four positioning blocks 1 are driven to grind the inner circumferential wall of the gasket blank, and the outer arc grinding plates at the upper ends of the side walls of the multiple positioning blocks 2 are driven to grind the outer circumferential wall of the gasket blank. Through the synchronous expansion movement and reciprocating rotation movement of the four positioning blocks 1, precise positioning and uniform grinding of the gasket blank are achieved.

[0018] 6. By designing the radian of the inner arc grinding plate to be the same as the radian of the inner cavity circle of the gasket blank and the radian of the outer arc grinding plate to be the same as the radian of the outer circumferential wall of the gasket blank, when the four positioning blocks 1 form a synchronous expansion movement, the four inner arc grinding plates can closely adhere to the inner circumferential wall of the gasket blank. When the four positioning blocks 2 perform a synchronous contraction movement, the four outer arc grooves can closely adhere to the outer circumferential wall of the gasket blank, further achieving a precise and uniform grinding effect on the side wall of the gasket blank.

[0019] 7. By installing the guide plate at the top of the grinding groove, a circular notch structure is formed between the top of the feed guide plate and the material taking groove. By first outputting the gasket blank onto the top of the two combined feed guide plates, it can ensure that the gasket blank is stably transported into the circular notch structure, avoiding the problems that the gasket blank directly falls into the curved surface grinding component and is prone to flipping and tilting. Then, through the gradual separation of the two feed guide plates, the gasket blank falls, and the inner cavity of the gasket blank is sleeved on the guide block, enabling the gasket blank to stably fall onto the top of the clamping ring along the guide block. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the split structural schematic diagram of the base and the lower die of the present invention; Figure 3 is the structural schematic diagram of the upper die and the lower die of the present invention; Figure 4 is the sectional structural schematic diagram of the material taking punch of the present invention; Figure 5 is the sectional structural schematic diagram of the lower die of the present invention; Figure 6 is the structural schematic diagram of the gasket straightening component of the present invention; Figure 7 is another sectional structural schematic diagram of the lower die of the present invention; Figure 8 Schematic cross-sectional view of the material pushing groove of the present invention; Figure 9 Schematic structural view of the material pushing assembly of the present invention; Figure 10 Schematic structural view of the clamping and grinding assembly of the present invention; Figure 11 Schematic structural view of the feeding guide assembly and the curved surface grinding assembly of the present invention; Figure 12 Schematic bottom view of the feeding guide assembly of the present invention; Figure 13 Schematic overall view of the curved surface grinding assembly of the present invention; Figure 14 Schematic disassembled view of the operation substrate and the equipment cylinder of the present invention; Figure 15 Schematic disassembled view of the fixing ring frame and the equipment cylinder of the present invention; Figure 16 Schematic disassembled view of the operation substrate and the rotating plate of the present invention; Figure 17 Schematic bottom view of the operation substrate of the present invention; Figure 18 Schematic structural view of the positioning block 1 and the positioning block 2 of the present invention.

[0021] Explanation of the reference numerals in the figure: 1. Upper mold; 2. Lower mold; 3. Base; 4. Material pushing assembly; 5. Clamping and grinding assembly; 6. Feeding guide assembly; 7. Curved surface grinding assembly; 8. Metal plate raw material; 9. Gasket blank; 10. Inner hole waste; 101. Inner hole punch; 102. Gasket punch; 103. Material taking punch; 104. Relief groove; 105. Ring magnet; 106. Guide head; 201. Inner hole punching groove; 202. Gasket punching groove; 203. Material taking groove; 204. Transition groove; 205. Material pushing groove; 206. Grinding groove; 207. Pressing table; 208. Waste output channel; 209. External hole; 210. Driving groove; 211. Moving groove; 212. T-shaped sliding groove; 213. Slide bar; 301. Die groove; 401. Hydraulic cylinder 1; 402. Slide plate; 403. Push plate; 404. T-shaped slider; 501. N-shaped frame; 502. Lower grinding plate; 503. Support plate; 504. Spring; 505. Upper grinding plate; 601. Hydraulic cylinder 2; 602. Guide plate; 603. Sliding rib; 604. Feeding guide plate; 605. Rack 1; 606. Driving block; 607. Gear; 71. Fixing ring frame; 72. Operation substrate; 73. Equipment cylinder; 74. Fixing frame; 7101, fixed curved plate; 7102, ring frame; 7103, support rod; 7104, support plate; 7105, clamping ring; 7201, inner groove; 7202, movable arc groove; 7203, outer groove; 7204, positioning block one; 7205, positioning block two; 7206, guide block; 72041, driving column one; 72042, inner arc grinding plate; 72051, driving column two; 72052, outer arc grinding plate; 7301, tooth mouth; 7302, motor; 7303, movable groove; 7304, rotating plate; 7305, inner arc groove; 7306, middle arc groove; 7307, outer arc groove; 7401, hydraulic cylinder three; 7402, rack two. DETAILED DESCRIPTION

[0022] like Figures 1 to 18 As shown, the present invention relates to a stamping die for valve gasket production and processing, including a stamping machine, the stamping machine includes an upper die 1, a lower die 2 and a base 3, the upper die 1 is arranged at the output end of the stamping drive assembly of the stamping machine, the base 3 is arranged below the upper die 1, a die groove 301 is opened on the top of the base 3, and the lower die 2 is installed in the die groove 301; The bottom of the upper mold 1 is connected to an inner hole punch 101, a gasket punch 102 and a material pick-up punch 103. The inner hole punch 101 and the gasket punch 102 are arranged linearly in the output direction of the metal plate raw material 8. The bottom of the material pick-up punch 103 is provided with a clearance groove 104 and an annular groove. An annular magnet 105 is arranged in the annular groove. The annular magnet 105 is used to magnetically adsorb the gasket blank 9. The bottom of the gasket punch 102 is connected to a guide head 106. The lower mold 2 An inner hole punching groove 201, a gasket punching groove 202 and a material removal groove 203 are provided on the top; when the upper mold 1 punches toward the top of the lower mold 2, the inner hole punch 101 is inserted into the inner hole punching groove 201 to punch out the inner hole shape of the gasket blank 9 on the metal plate raw material 8, the gasket punch 102 is inserted into the gasket punching groove 202 to punch out the overall shape of the gasket blank 9 from the metal plate raw material 8, and the material removal punch 103 is inserted into the material removal groove 203 to take out the stamped gasket blank 9.

[0023] The present invention conveys the metal plate raw material 8 to the top of the lower mold 2 through an external conveying device, starts the stamping drive assembly of the stamping machine, and drives the upper mold 1 to move up and down. When the upper mold 1 moves downward, the metal plate raw material 8 is punched out with the inner hole shape of the gasket blank 9 through the inner hole punch 101. After the upper mold 1 moves upward, the external conveying device conveys the metal plate raw material 8 forward again, so that the part with the punched inner hole shape is moved to the top of the gasket groove 202. When the upper mold 1 moves downward again, the gasket punch 102 is inserted into the gasket groove 202, and the overall shape of the gasket blank 9 is punched out from the metal plate raw material 8, completing the manufacture of the gasket blank 9.

[0024] In an embodiment of the present invention, the gasket punching groove 202 communicates with the material taking groove 203 through a transition groove 204. One side of the gasket punching groove 202 communicates with a material pushing groove 205. A grinding groove 206 is formed below the material taking groove 203. A gasket straightening component is arranged in the inner cavity of the lower die 2. The gasket straightening component is used for correcting the flatness and removing burrs of the gasket blank 9 formed by stamping. The gasket straightening component includes a pressing table 207 arranged below the gasket punching groove 202, a material pushing component 4 arranged in the material pushing groove 205, a clamping and grinding component 5 arranged in the transition groove 204, a feeding guiding component 6 and a curved surface grinding component 7 arranged in the grinding groove 206. The gasket blank 9 formed by stamping is pressed by the gasket punch 102 to the bottom of the inner part of the gasket punching groove 202 to correct the flatness of the possible bending problem of the gasket blank 9. After the gasket punch 102 is lifted, the material pushing component 4 pushes the corrected gasket blank 9 forward. When the gasket blank 9 passes through the transition groove 204, the clamping and grinding component 5 grinds the upper and lower surfaces of the gasket blank 9 until the gasket blank 9 enters the curved surface grinding component 7. The curved surface grinding component 7 grinds the inner side wall and the outer side wall of the gasket blank 9.

[0025] In the present invention, by arranging a gasket straightening component in the inner cavity of the lower die 2, the gasket blank 9 formed by stamping is pressed by the gasket punch 102 to the bottom of the inner part of the gasket punching groove 202 to correct the flatness of the possible bending problem of the gasket blank 9. Until after the gasket punch 102 is lifted, the material pushing component 4 pushes the corrected gasket blank 9 forward. When the gasket blank 9 passes through the transition groove 204, the clamping and grinding component 5 grinds its upper and lower surfaces to remove the burrs on the upper and lower surfaces. The gasket blank 9 continues to move forward and enters the curved surface grinding component 7 from the material taking groove 203. The curved surface grinding component 7 grinds its inner side wall and the outer side wall to further remove the burrs on the inner and outer side walls. Finally, the gasket blank 9 after straightening and grinding is taken out by the material taking punch. The clamping and grinding component 5 and the curved surface grinding component 7 respectively grind the upper and lower surfaces, the inner side wall and the outer side wall of the gasket blank, effectively removing the burrs generated during the stamping process, improving the quality of the product, integrating multiple processes such as stamping, straightening, grinding and material taking in the stamping die, reducing the transfer and waiting time between different processes in the traditional production process, and greatly improving the production efficiency.

[0026] In an embodiment of the present invention, a waste output channel 208 is connected to the bottom of the inner hole punching groove 201. The waste output channel 208 is used to discharge the inner hole waste 10. An inclined plate is arranged at the top of the die groove 301. The inclined plate is used to discharge the inner hole waste 10 falling in the output channel 208 to the outside; an external hole 209 is opened at the bottom of the pressing table 207. The external hole 209 can discharge the air pressure generated when the gasket punch 102 punches downward. Moreover, when the gasket punch 102 is inserted downward into the gasket punching groove 202 to punch out the overall shape of the gasket blank 9 from the metal plate raw material 8, the guiding head 106 is inserted into the inner hole of the gasket blank 9 to guide the gasket blank 9. The gasket punch 102 drives the gasket blank 9 to continuously descend onto the pressing table 207, and the guiding head 106 enters the external hole 209. The external hole 209 provides a downward pressing space for the guiding head 106. The gasket punch 102 cooperates with the pressing table 207 to flatten the gasket blank 9; during the stamping operation, the inner hole punch 101 punches the metal plate raw material 8, and inner hole waste 10 is generated during the formation of the inner hole of the gasket blank 9. These wastes fall to the bottom of the inner hole punching groove 201. Since the bottom of the inner hole punching groove 201 is connected to the waste output channel 208, the inner hole waste 10 falls downward through the waste output channel 208 by gravity or the pressure generated by stamping. The inclined plate at the top of the die groove 301 changes the falling trajectory of the inner hole waste 10, enabling it to be smoothly discharged outside the die, avoiding the accumulation of waste inside the die.

[0027] In the present invention, when the gasket punch 102 punches downward the metal plate raw material 8 to form the gasket blank 9, the air in the gasket punching groove 202 will be compressed to generate air pressure. At this time, the external hole 209 opened at the bottom of the pressing table 207 plays a role in discharging this part of the air pressure, preventing the air pressure from interfering with the stamping process, ensuring the stability and reliability of the stamping operation. At the same time, during the stamping process, the guiding head 106 at the bottom of the gasket punch 102 will be inserted into the inner hole of the gasket blank 9 to provide precise guidance for the gasket blank 9 during stamping, ensuring its accurate position. As the gasket punch 102 presses downward, it drives the gasket blank 9 to descend onto the pressing table 207, and the guiding head 106 enters the external hole 209. The external hole 209 provides sufficient downward pressing space for the guiding head 106, enabling the gasket punch 102 to cooperate with the pressing table 207 to apply uniform pressure to the gasket blank 9 and flatten it, ensuring that it is evenly stressed during the flattening process, significantly improving the flatness of the gasket blank 9, enhancing the product quality of the valve gasket, and strengthening the sealing performance and reliability of the product during actual use.

[0028] In an embodiment of the present invention, the material pushing groove 205 is communicated with a driving groove 210 and a movable groove 211. Above the movable groove 211, a T-shaped sliding groove 212 is communicated. A plurality of sliding rods 213 are connected to the inner side wall of the material pushing groove 205. The material pushing groove 205 is communicated with the driving groove 210, the movable groove 211 and the T-shaped sliding groove 212, providing space and guidance for the movement of the material pushing assembly 4. The material pushing assembly 4 includes a first hydraulic cylinder 401 arranged at the inner top of the driving groove 210. The output end of the first hydraulic cylinder 401 is connected to a sliding plate 402. The sliding plate 402 is slidably arranged on a plurality of sliding rods 213. The top of the sliding plate 402 is connected to a pushing plate 403. The pushing plate 403 is movably arranged in the movable groove 211. The top of the pushing plate 403 is connected to a T-shaped slider 404. The T-shaped slider 404 is slidably arranged in the T-shaped sliding groove 212. One end of the pushing plate 403 is provided with an arc-shaped structure. When it is necessary to push the gasket blank 9 formed by stamping, the first hydraulic cylinder 401 is started. The output end of the first hydraulic cylinder 401 pushes the sliding plate 402. Since the sliding plate 402 is sleeved on a plurality of sliding rods 213, under the restriction of the sliding rods 213, the sliding plate 402 can only slide linearly along the direction of the sliding rods 213. As the sliding plate 402 slides, the pushing plate 403 connected to the top of the sliding plate 402 also moves in the movable groove 211. The T-shaped slider 404 at the top of the pushing plate 403 slides in the T-shaped sliding groove 212, further ensuring the stability and accuracy of the movement of the pushing plate 403 and preventing the pushing plate 403 from shifting or shaking during the movement. The arc-shaped structure at one end of the pushing plate 403 can push the gasket blank 9 more smoothly when contacting the gasket blank 9, avoiding the offset of the gasket blank 9.

[0029] In an embodiment of the present invention, the grinding clamping assembly 5 includes an N-shaped frame 501, the bottom of the N-shaped frame 501 is connected to a lower grinding plate 502 arranged at the bottom of the transition groove 204, the inner wall of the N-shaped frame 501 is connected to a plurality of support plates 503, and the bottom of the support plate 503 is connected to an upper grinding plate 505 through a plurality of springs 504; the top of the lower grinding plate 502 is used to grind the bottom of the gasket blank 9, and the bottom of the upper grinding plate 505 is used to grind the top of the gasket blank 9, and one end of the upper grinding plate 505 is a circular arc raised plate structure; when the pushing assembly 4 pushes the stamped and flatness-corrected gasket blank 9 forward to enter the transition groove 204, the grinding clamping assembly 5 begins to function, and the support plate 503 on the inner wall of the N-shaped frame 501 is connected to the upper grinding plate 505 through the spring 504, and the spring 504 will generate a downward elastic force , so that the upper grinding plate 505 is pressed on the top of the gasket blank 9, and at the same time, the lower grinding plate 502 arranged at the bottom of the transition groove 204 contacts the bottom of the gasket blank 9. In the process of the gasket blank 9 being pushed forward by the pushing assembly, the top of the gasket blank 9 and the bottom of the upper grinding plate 505 are relatively rubbed, and the upper grinding plate 505 grinds the top of the gasket blank 9; the bottom of the gasket blank 9 and the top of the lower grinding plate 502 are relatively rubbed, and the lower grinding plate 502 grinds the bottom of the gasket blank 9, so as to remove burrs and uneven parts on the upper and lower surfaces of the gasket blank 9; one end of the upper grinding plate 505 is designed as a circular arc raised plate structure. When the gasket blank 9 enters the transition groove 204, this circular arc raised plate can play a guiding role, so that the gasket blank 9 can enter the grinding area between the upper grinding plate 505 and the lower grinding plate 502 more smoothly. The present invention grinds the upper and lower surfaces of the gasket blank 9 simultaneously by the upper grinding plate 505 and the lower grinding plate 502, which can effectively remove burrs and unevenness generated during the stamping process, improve the flatness and smoothness of the surface of the gasket blank 9, and enhance the overall quality and sealing performance of the valve gasket.

[0030] In an embodiment of the present invention, the feeding guide assembly 6 includes a second hydraulic cylinder 601 installed at the top inside the grinding groove 206 and two symmetrically arranged guide plates 602. A sliding rib 603 is provided on the side wall of the guide plate 602, and a feeding guide plate 604 is sleeved on the guide plate 602. Since the guide plate 602 is installed at the top inside the grinding groove 206, a circular notch structure is formed between the top of the feeding guide plate 604 and the material taking groove 203. A sliding groove is formed on the inner side wall of the feeding guide plate 604, and the feeding guide plate 604 is slidably engaged with the sliding rib 603 through the sliding groove. A first rack 605 is integrally formed on the side wall of the feeding guide plate 604. The bottom of one of the feeding guide plates 604 is connected with a driving block 606, and the output end of the second hydraulic cylinder 601 is connected with the side wall of the driving block 606. The first rack 605 is meshed with a gear 607, and the gear 607 is rotatably arranged at the top inside the grinding groove 206. The two feeding guide plates 604 are in transmission cooperation through the gear 607. When the pushing component 4 continues to push the gasket blank 9 forward until it enters the top of the two combined feeding guide plates 604, that is, into the circular notch structure, the pushing component 4 is reset. Then, the second hydraulic cylinder 601 drives the driving block 606 to drive the connected feeding guide plate 604 to move. Since the two feeding guide plates 604 are in transmission cooperation through the gear 607, they will move relatively synchronously, causing the two feeding guide plates 604 to gradually form a separated state, and the gasket blank 9 gradually loses the supporting effect of the two feeding guide plates 604 and falls downward. By first outputting the gasket blank 9 into the top of the two combined feeding guide plates 604, the present invention can ensure that the gasket blank 9 is stably conveyed into the circular notch structure, avoiding the problems that the gasket blank 9 directly falls into the curved surface grinding component 7 and is prone to flipping and tilting. Then, by gradually forming a separated state of the two feeding guide plates 604, the gasket blank 9 falls downward.

[0031] In an embodiment of the present invention, the curved surface grinding assembly 7 is arranged below the feeding guiding assembly 6. The curved surface grinding assembly 7 includes a fixed ring frame 71 connected to the inner top of the grinding groove 206. An operating substrate 72 is rotatably arranged on the top of the fixed ring frame 71. The bottom of the operating substrate 72 is bolted with an equipment cylinder 73. The bottom of the equipment cylinder 73 is rotatably arranged on the inner bottom of the grinding groove 206. A fixed frame 74 is also arranged on the inner bottom of the grinding groove 206. A third hydraulic cylinder 7401 is arranged on the top of the fixed frame 74. A second rack 7402 is slidably arranged on the top of the fixed frame 74. The output end of the third hydraulic cylinder 7401 is connected to the second rack 7402. A tooth opening 7301 is arranged on the circumferential outer wall of the equipment cylinder 73. The second rack 7402 is meshed with the tooth opening 7301. By driving the second rack 7402 to reciprocally slide on the top of the fixed frame 74 through the third hydraulic cylinder 7401, the equipment cylinder 73 meshed with the second rack 7402 through the tooth opening 7301 undergoes reciprocal rotation. Through the cooperation of the tooth opening 7301 and the second rack 7402, the equipment cylinder 73 can be driven to perform small-amplitude reciprocal rotation. This reciprocal rotation motion provides a certain swinging basis for the subsequent grinding of the side wall of the gasket blank 9.

[0032] In an embodiment of the present invention, a motor 7302 is arranged in the inner cavity of the equipment cylinder 73. Three annularly arrayed movable grooves 7303 are opened at the top of the equipment cylinder 73; the output end of the motor 7302 is connected with a rotating plate 7304. Four inner arc grooves 7305, three middle arc grooves 7306 and four outer arc grooves 7307 are opened at the top of the rotating plate 7304; the fixed ring frame 71 includes a fixed curved plate 7101 connected to the inner top of the grinding groove 206. A circular frame 7102 is connected to the inner side wall of the fixed curved plate 7101. A wheel track is arranged on the top of the circular frame 7102. The inner circumferential wall of the circular frame 7102 is connected with a support platform through three support rods 7103. A clamping ring 7105 is connected to the top of the support platform through three support plates 7104; the support rods 7103 are movably arranged in the movable grooves 7303, and the support plates 7104 are movably arranged in the middle arc grooves 7306. When the equipment cylinder 73 undergoes reciprocal rotation, the collision of the equipment cylinder 73 against the support rods 7103 can be avoided through the movable grooves 7303, and the collision of the rotating plate 7304 against the support plates 7104 can be avoided through the middle arc grooves 7306. The rotating plate 7304 is movably arranged between the clamping ring 7105 and the support platform.

[0033] As another embodiment of the present invention, the side wall of the operation substrate 72 is rotatably arranged on the wheel track at the top of the circular frame 7102 through a plurality of rollers. Four inner grooves 7201, three movable arc grooves 7202 and four outer grooves 7203 are provided in the operation substrate 72 from top to bottom. The four inner grooves 7201 are arranged in a circular array, the three movable arc grooves 7202 are arranged in a circular array, and the four outer grooves 7203 are arranged in a circular array. A guide block 7206 is connected to the top of the operation substrate 72. The support plate 7104 is movably arranged in the movable arc groove 7202. When the operation substrate 72 rotates reciprocally with the equipment cylinder 73, the movable arc groove 7202 can prevent the operation substrate 72 from colliding with the support plate 7104. The operation substrate 72 is movably arranged between the clamping ring 7105 and the rotating plate 7304. The axial center position at the top of the rotating plate 7304 is rotatably connected to the axial center position at the bottom of the operation substrate 72 through a bearing; A positioning block one 7204 is slidably arranged in the inner groove 7201. A sliding groove opening is arranged on the inner side wall of the inner groove 7201. A sliding block is arranged on the side wall of the positioning block one 7204. The positioning block one 7204 slides in the sliding groove opening through the sliding block. Similarly, a positioning block two 7205 is slidably arranged in the outer groove 7203; The bottom of the positioning block one 7204 is connected to a driving column one 72041. The driving column one 72041 is movably arranged in the inner arc groove 7305. An inner arc grinding plate 72042 is arranged at the upper end of the side wall of the positioning block one 7204. The radian of the inner arc grinding plate 72042 is the same as the radian of the inner cavity circle of the gasket blank 9; The bottom of the positioning block two 7205 is connected to a driving column two 72051. The driving column two 72051 is movably arranged in the outer arc groove 7307. An outer arc grinding plate 72052 is arranged at the upper end of the side wall of the positioning block two 7205. The radian of the outer arc grinding plate 72052 is the same as the radian of the circumferential outer wall of the gasket blank 9.

[0034] When the two feeding guide plates 604 gradually form a separated state and the gasket blank 9 falls, the inner cavity of the gasket blank 9 is sleeved on the guide block 7206, so that the gasket blank 9 falls downward along the guide block 7206 and lands on the top of the clamping ring 7105. Then, the motor 7302 inside the equipment cylinder 73 operates to drive the rotating plate 7304 to rotate. The rotating plate 7304 drives the four first positioning blocks 7204 to move through the four inner arc grooves 7305 respectively. The four first positioning blocks 7204 slide in the inner grooves 7201 respectively, so that the four first positioning blocks 7204 form a synchronous expansion movement and gradually contact the circumferential inner wall of the gasket blank 9, forming a positioning effect on the gasket blank 9 and keeping the gasket blank 9 centered on the top of the clamping ring 7105. Similarly, the rotating plate 7304 simultaneously drives the four second positioning blocks 7205 to form a synchronous contraction movement through the four outer arc grooves 7307 respectively, so that the four outer arc grooves 7307 gradually contact the circumferential outer wall of the gasket blank 9. After the gasket blank 9 is positioned on the top of the clamping ring 7105, the upper die 1 presses down, driving the material taking punch 103 to press down on the top of the gasket blank 9. The material taking punch 103 cooperates with the clamping ring 7105 to clamp and fix the gasket blank 9. Then, the equipment cylinder 73 rotates reciprocally with a small amplitude, driving the inner arc grinding plates 72042 at the upper ends of the side walls of the four first positioning blocks 7204 to grind the circumferential inner wall of the gasket blank 9, and driving the outer arc grinding plates 72052 at the upper ends of the side walls of the four second positioning blocks 7205 to grind the circumferential outer wall of the gasket blank 9. After the grinding is completed, the upper die 1 moves upward, driving the material taking punch 103 to move upward. The material taking punch 103 magnetically adsorbs the gasket blank 9 through the annular magnet 105 at the bottom, takes it out of the material taking groove 203, and transfers it through an external material receiving device.

[0035] Working principle: This embodiment provides a stamping die for the production and processing of valve gaskets. When in use, the stamping drive assembly of the stamping machine drives the upper die 1 to move downward. The gasket punch 102 is inserted into the gasket punching groove 202 to punch out the overall shape of the gasket blank 9. At the same time, the gasket punch 102 continues to descend, pressing the gasket blank 9 onto the pressing table 207 at the inner bottom of the gasket punching groove 202 for flatness correction. After the upper die 1 rises again, the pushing component 4 pushes the gasket blank 9 forward. The gasket blank 9 enters between the upper grinding plate 505 and the lower grinding plate 502. During the forward movement of the gasket blank 9, its upper and lower surfaces respectively rub against the upper and lower grinding plates to remove burrs and uneven parts. The pushing component 4 pushes the gasket blank 9 into the circular notch structure at the top of the two combined feeding guide plates 604. The pushing component 4 resets, and the two feeding guide plates 604 move synchronously and separately, causing the gasket blank 9 to lose support and fall, landing on the top of the clamping ring 7105 along the guiding block 7206. The motor 7302 in the inner cavity of the equipment cylinder 73 drives the rotating plate 7304 to rotate. The rotating plate 7304 drives the positioning block one 7204 and the positioning block two 7205 to move through the inner arc groove 7305 and the outer arc groove 7307 respectively, so that they contact and position the inner and outer circumferential walls of the gasket blank 9 respectively. The upper die 1 presses down, and the blank taking punch 103 cooperates with the clamping ring 7105 to clamp and fix the gasket blank 9. The hydraulic cylinder three 7401 drives the rack two 7402 to slide, causing the equipment cylinder 73 to rotate reciprocally, driving the inner arc grinding plate 72042 and the outer arc grinding plate 72052 to polish the inner and outer side walls of the gasket blank 9. After the polishing is completed, the upper die 1 moves upward, driving the blank taking punch 103 to move upward. The annular magnet 105 at the bottom of the blank taking punch 103 magnetically adsorbs the gasket blank 9, taking it away from the blank taking groove 203 and transferring it by an external material receiving device.

[0036] The embodiments disclosed in the present invention are preferred embodiments, but are not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A stamping die for the production and processing of valve gaskets, comprising a stamping machine, characterized in that: The punching machine comprises an upper die, a lower die and a base; The bottom of the upper die is connected with an inner hole punch, a gasket punch and a material removal punch; The top of the lower mold is provided with an inner hole punching groove, a gasket punching groove and a material taking groove; The gasket punching groove is connected to the material taking groove through a transition groove, one side of the gasket punching groove is connected to a material pushing groove, and a grinding groove is provided below the material taking groove; The inner cavity of the lower mold is provided with a gasket correction component, and the gasket correction component is used to correct the flatness and remove burrs of the stamped gasket blank; The gasket correction assembly includes a press table arranged below the gasket punching groove, a push assembly arranged in the push groove, a clamping and grinding assembly arranged in the transition groove, and a feed guide assembly and a curved surface grinding assembly arranged in the grinding groove; The stamped gasket blank is pressed down on the bottom of the gasket groove by the gasket punch to correct the flatness of the gasket blank, and the gasket blank is pushed forward by the pushing assembly. When the gasket blank passes through the transition groove, the clamping and grinding assembly grinds the upper and lower surfaces of the gasket blank until the gasket blank enters the curved surface grinding assembly, and the inner and outer walls of the gasket blank are grinded by the curved surface grinding assembly.

2. A stamping die for producing and processing valve gaskets according to claim 1, characterized in that: The upper die is arranged at the output end of the punching drive assembly of the punching machine, the base is arranged below the upper die, a die groove is opened on the top of the base, and the lower die is installed in the die groove; When the upper mold is punching toward the top of the lower mold, the inner hole punch is inserted into the inner hole groove to punch out the inner hole shape of the gasket blank on the metal plate raw material, the gasket punch is inserted into the gasket groove to punch out the overall shape of the gasket blank from the metal plate raw material, and the material removal punch is inserted into the material removal groove to take out the stamped gasket blank.

3. A stamping die for producing and processing valve gaskets according to claim 2, characterized in that: The inner hole punch and the gasket punch are arranged linearly in the output direction of the metal plate raw material. A clearance groove and an annular groove are opened at the bottom of the material extraction punch. An annular magnet is arranged in the annular groove. A guide head is connected to the bottom of the gasket punch.

4. A stamping die for producing and processing valve gaskets according to claim 3, characterized in that: The bottom of the inner hole punching groove is connected to a waste output channel, and the waste output channel is used to discharge the inner hole waste; an external hole is opened at the bottom of the pressing platform, and when the gasket punch is inserted downward into the gasket punching groove to punch out the overall shape of the gasket blank from the metal plate raw material, the guide head is inserted into the inner hole of the gasket blank to guide the gasket blank, and the gasket punch drives the gasket blank to continuously descend to the pressing platform, and the guide head enters the external hole, and the gasket punch cooperates with the pressing platform to flatten the gasket blank.

5. A stamping die for producing and processing valve gaskets according to claim 4, characterized in that: The pushing groove is connected to a driving groove and a movable groove, the movable groove is connected to a T-shaped slide groove above, and the inner side wall of the pushing groove is connected to multiple sliding rods; the pushing assembly includes a hydraulic cylinder 1 arranged at the top of the driving groove, the output end of the hydraulic cylinder 1 is connected to a slide plate, the slide plate is slidably arranged on the multiple slide rods, the top of the slide plate is connected to a push plate, the push plate is movably arranged in the movable groove, the top of the push plate is connected to a T-shaped slider, the T-shaped slider is slidably arranged in the T-shaped slide groove, and one end of the push plate is set to a circular arc structure.

6. A stamping die for producing and processing valve gaskets according to claim 5, characterized in that: The grinding clamping assembly includes an N-shaped frame, the bottom of the N-shaped frame is connected to a lower grinding plate arranged at the bottom of the transition groove, the inner side wall of the N-shaped frame is connected to a plurality of support plates, and the bottom of the support plate is connected to an upper grinding plate through a plurality of springs; the top of the lower grinding plate is used to grind the bottom of the gasket blank, and the bottom of the upper grinding plate is used to grind the top of the gasket blank, and one end of the upper grinding plate is a circular arc raised plate-like structure.

7. A stamping die for producing and processing valve gaskets according to claim 6, characterized in that: The feed guide assembly includes a hydraulic cylinder 2 installed on the top of the grinding groove and two symmetrically arranged guide plates, the guide plate side walls are provided with sliding ridges, the guide plates are sleeved with feed guide plates, the inner side walls of the feed guide plates are provided with sliding grooves, the feed guide plates slide and cooperate with the sliding ridges through the sliding grooves, and the side walls of the feed guide plates are integrally formed with a rack 1; a driving block is connected to the bottom of one of the feed guide plates, and the output end of the hydraulic cylinder 2 is connected to the side wall of the driving block; the rack 1 is meshed with a gear, and the gear is rotatably arranged at the top of the grinding groove, and the two feed guide plates cooperate through gear transmission.

8. A stamping die for producing and processing valve gaskets according to claim 7, characterized in that: The curved surface grinding assembly is arranged below the feed guide assembly, and the curved surface grinding assembly includes a fixed ring frame connected to the top of the grinding groove, an operating base plate is rotatably arranged on the top of the fixed ring frame, and an equipment barrel is connected to the bottom of the operating base plate by bolts, and the bottom of the equipment barrel is rotatably arranged on the bottom of the grinding groove. A fixed frame is also arranged at the bottom of the grinding groove, a hydraulic cylinder three is arranged on the top of the fixed frame, and a rack two is slidably arranged on the top of the fixed frame, the output end of the hydraulic cylinder three is connected to the rack two, and a tooth opening is arranged on the circumferential outer wall of the equipment barrel, and the rack two is meshed and connected with the tooth opening.

9. A stamping die for producing and processing valve gaskets according to claim 8, characterized in that: A motor is arranged in the inner cavity of the equipment barrel, and a plurality of movable grooves arranged in a circular array are provided on the top of the equipment barrel; a rotating plate is connected to the output end of the motor, and a plurality of inner arc grooves, a plurality of middle arc grooves and a plurality of outer arc grooves are provided on the top of the rotating plate; the fixed ring frame comprises a fixed curved plate connected to the top of the grinding groove, a ring-shaped frame is connected to the inner side wall of the fixed curved plate, a wheel track is arranged on the top of the ring-shaped frame, the inner circumferential wall of the ring-shaped frame is connected to a support platform through a plurality of support rods, and a clamping ring is connected to the top of the support platform through a plurality of support plates; the support rod is movably arranged in the movable groove, the support plate is movably arranged in the middle arc groove, and the rotating plate is movably arranged between the clamping ring and the support platform.

10. A stamping die for producing and processing valve gaskets according to claim 9, characterized in that: The side wall of the operating base plate is rotatably arranged on the wheel track at the top of the ring frame through a plurality of rollers, the operating base plate is provided with a plurality of inner grooves, a plurality of movable arc grooves and a plurality of outer grooves from top to bottom, a guide block is connected to the top of the operating base plate, the support plate is movably arranged in the movable arc groove, the operating base plate is movably arranged between the clamping ring and the rotating plate, and the top axis position of the rotating plate is rotatably connected to the bottom axis position of the operating base plate through a bearing; A first positioning block is slidably arranged in the inner groove, and a second positioning block is slidably arranged in the outer groove; The bottom of the positioning block is connected to a driving column, and the driving column is movably arranged in the inner arc groove. An inner arc grinding plate is arranged on the upper end of one side wall of the positioning block, and the curvature of the inner arc grinding plate is the same as the curvature of the inner cavity circle of the gasket blank; The bottom of the second positioning block is connected with a second driving column, and the second driving column is movably arranged in the outer arc groove. The upper end of the side wall of the second positioning block is arranged with an outer arc grinding plate, and the curvature of the outer arc grinding plate is the same as the curvature of the circumferential outer wall of the gasket blank.

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