A stamping die for manufacturing seamless steel gas cylinders

Abstract

The invention discloses a steel seamless gas cylinder manufacturing stamping die, which relates to the technical field of gas cylinder stamping dies. A spacer is installed on the top of the base, a top seat is installed on the top of the spacer, a material template is embedded and slidably installed on the side end face of the spacer, a lower die hole is opened on one side of the top of the material template, and a plurality of rotating seats are equidistantly and evenly installed on the bottom edge of the spacer. The invention can realize the stamping and forming of gas cylinders with different outer diameters, realize step-by-step dynamic stamping of the blank, reduce the difficulty of stamping, avoid the local wear of the die affecting the effectiveness of stamping, reduce the load pressure borne by the die during the buffering process, make the blank more evenly pressed, realize triple stamping of the blank, integrate preliminary stamping and forming, secondary drawing and correction, and final pressing, and with the effect of graded dynamic stamping, can fully guarantee the effectiveness of stamping work, and greatly improve the forming quality of gas cylinder blanks.

Description

Technical Field

[0001] The invention relates to the technical field of gas cylinder stamping dies, in particular to a steel seamless gas cylinder manufacturing stamping die. Background Art

[0002] Seamless gas cylinders are manufactured by stamping and stretching, and have a bottle body without obvious seams or welds. This manufacturing method ensures that the internal surface of the gas cylinder is uniform and smooth. The strength and sealing performance of the gas cylinder are higher than those of welded gas cylinders, and it is more suitable for storing and transporting high-pressure gases. Now, a suitable stamping tooling die is needed to manufacture seamless steel gas cylinders. A Chinese patent discloses a cold extrusion and stripping tooling for aluminum alloy seamless gas cylinders, and the application number is 202123421338.9. The tooling die can automatically strip the workpiece of the aluminum alloy seamless gas cylinder after extrusion, reducing the work tasks of personnel and greatly improving work efficiency.

[0003] At present, the bottom mold of the stamping die for manufacturing seamless gas cylinders is mostly in a static fixed state, the stamping work is sluggish and rigid, the mold has a high load pressure during the stamping process, and the effectiveness of the stamping work is easily affected by local damage to the mold. Different molds need to be replaced when processing gas cylinders with different outer diameters. Different devices also need to be replaced during the stamping process for the initial stamping and secondary drawing correction work. Not only is the processing process cumbersome and inconvenient, but the connection stability of various tasks is also poor, resulting in poor molding quality of gas cylinders and low processing efficiency. Summary of the invention

[0004] The present invention provides a steel seamless gas cylinder manufacturing stamping die, which can effectively solve the problem of the current seamless gas cylinder manufacturing stamping die proposed in the above background technology, that the bottom die is mostly in a static fixed state, the stamping work is sluggish and rigid, the die has a high load pressure during the stamping process, and the effectiveness of the stamping work is easily affected by local damage to the die. Different dies need to be replaced when processing gas cylinders with different outer diameters, and different devices need to be replaced for the initial stamping and forming work and the secondary drawing and correction work during the stamping process. Not only is the processing process cumbersome and inconvenient, but the connection stability of various tasks is also poor, resulting in poor gas cylinder forming quality and low processing efficiency.

[0005] To achieve the above object, the present invention provides the following technical solution: a steel seamless gas cylinder manufacturing stamping die, comprising a base, a spacer is installed on the top of the base, a top seat is installed on the top of the spacer, a material template is embedded and slidably installed on the side end surface of the spacer, a lower die hole is opened on one side of the top of the material template, and a plastic pressing die mechanism is installed on the bottom of the top seat;

[0006] The plastic die pressing mechanism comprises a rotating seat;

[0007] A plurality of rotating seats are equidistantly and evenly mounted on the edge of the bottom end of the partition seat for rotation, a plurality of sliding grooves are provided on the inner wall of the rotating seat at equal angles along the circumferential direction, a driving block is slidably mounted inside the sliding groove, a pressure roller is embedded in the end of the driving block and is rotatably mounted, a limiting ear is installed in the middle of the top end of the driving block, a threaded rod is rotatably mounted in the middle of the side end face of the limiting ear, a threaded block is rotatably mounted on the outside of the threaded rod through a thread, a limiting groove is provided at the position of the threaded block corresponding to the outer curved surface of the rotating seat, a square shaft rod is embedded in the end of the threaded rod for sliding mounting, a ruler is installed at the bottom of the side end face of the threaded block, a gear is installed on the end of the square shaft rod, and a gear ring is rotatably mounted at the position of the gear corresponding to the top of the outer curved surface of the rotating seat;

[0008] A plurality of insert tubes are installed at equal angles along the circumferential direction at the bottom end of the rotating seat, a deflection guide box is installed at the top edge of the base, a rotating disk is rotatably installed inside the deflection guide box, and the inclined surface of the rotating disk and the inner wall of the deflection guide box are surrounded at equal angles along the circumferential direction to form a plurality of deflection grooves, a through hole is opened in the middle of the inclined surface of the rotating disk, and the through hole is connected to the slide groove through the insert tube, a pressure delivery pipe is installed on one side of the top end of the deflection guide box, an inner support is installed at the middle of the bottom end of the top seat through a thread, an outer mold seat is slidably installed on the outer side of the inner support, and the outer mold seat is slidably connected to the partition seat.

[0009] According to the above technical solution, the diameter of the pressure roller is greater than the width of the driving block, the length of the driving block is greater than the length of the threaded rod, and the inner diameter of the rotating seat is the same as the inner diameter of the lower die hole.

[0010] According to the above technical scheme, a sealing ring is installed at the bottom end of the inner support at a position inside the outer mold base, an annular cavity is opened at the position of the pressure delivery pipe inside the inner support, and the annular cavity is connected with the inner cavity of the deflection guide box through the pressure delivery pipe, and a plurality of guide holes are opened at equal angles along the circumferential direction at the bottom end of the annular cavity, a reset tube is installed at the top of the outer curved surface of the outer mold base, a side groove is opened at the side wall of the outer mold base corresponding to the position of the reset tube, a hydraulic cylinder is installed at the bottom of the side end surface of the base, and the end of the reset tube is connected with the top space of the inner cavity of the hydraulic cylinder, a piston block is slidably installed inside the hydraulic cylinder, a guide tube is installed on the other side of the bottom end of the deflection guide box, and the guide tube is connected with the bottom space of the inner cavity of the hydraulic cylinder, a hydraulic cylinder is installed in the middle of the top end of the hydraulic cylinder, and the end of the hydraulic cylinder output shaft is connected to the piston block.

[0011] According to the above technical solution, the product of the length of the pressure roller and the bottom area of ​​the sealing ring is equal to the sum of the volumes of the offset grooves, and the hydraulic cylinder is filled with hydraulic fluid;

[0012] The space of the inner cavity of the outer mold base located at the bottom of the sealing ring is communicated with the ring cavity through a guide hole, and the space of the inner cavity of the outer mold base located at the top of the sealing ring is communicated with the reset tube through a side groove.

[0013] According to the above technical solution, the ratio of the top force area of ​​the sealing ring to the bottom force area is equal to the ratio of the top force area of ​​the piston block to the bottom force area, and the ratio of the bottom force area of ​​the sealing ring to the bottom force area of ​​the piston block is equal to the ratio of the retractable distance of the hydraulic cylinder output shaft to the lifting distance of the outer mold base.

[0014] According to the above technical solution, the threaded block fits in with the limiting groove, the length of the scale is equal to the sliding distance of the threaded block, and the length of the scale is smaller than the inner diameter of the lower die hole.

[0015] According to the above technical solution, a power-assistance guarantee mechanism is installed on the outside of the base, and the power-assistance guarantee mechanism includes a monitoring cylinder;

[0016] A monitoring cylinder is installed at the bottom of the end surface on the other side of the base, a piston disk is slidably installed inside the monitoring cylinder, a circular convex block is installed in the middle of the bottom end of the piston disk, a boosting groove is opened inside the monitoring cylinder at the position corresponding to the piston disk, a same-pressure sliding cavity is opened inside the monitoring cylinder at the position corresponding to the circular convex block, a guide groove is opened inside the monitoring cylinder at a position on one side of the same-pressure sliding cavity, a flow pipe is installed at the position of the pressure delivery pipe corresponding to the bottom end of the deflection guide box, and the flow pipe is connected with the same-pressure sliding cavity through the guide groove;

[0017] A top pressure column is installed in the middle of the top of the piston disc, and the top pressure column is sealingly and slidably connected with the monitoring tube. A partition groove is opened inside the monitoring tube at a position corresponding to the end of the top pressure column, and a switch is embedded and installed at the top of the partition groove. An adjustment cavity is opened inside the monitoring tube at the top of the partition groove, and a movable plug is slidably installed inside the adjustment cavity. A screw is embedded and rotatably installed in the middle of the top of the monitoring tube, and the screw is connected to the movable plug through a thread, and a plurality of connection holes are opened at equal angles along the circumferential direction at the bottom of the adjustment cavity;

[0018] An external connection groove is opened inside the monitoring tube at a position between the boosting groove and the regulating chamber, a pressure gauge is embedded in the middle of the side end surface of the external connection groove, an air nozzle is embedded in the bottom of the side end surface of the external connection groove, an exhaust valve is embedded in the top of the side end surface of the external connection groove, a hollow plunger is embedded in the middle of the bottom end of the outer mold base, and the hollow plunger is slidably connected to the inner support, and a negative pressure valve is embedded in the middle of the top end of the inner support.

[0019] According to the above technical solution, the outer diameter of the piston disk is ten times the outer diameter of the circular protrusion, the distance between the piston disk and the switch is equal to the length of the top pressure column, the switch is a hydraulic cylinder control switch and an external alarm control switch, and the switch input end is electrically connected to the external power supply output end.

[0020] According to the above technical solution, the movable plug is elliptical, the boosting groove and the regulating chamber are connected to the external connection groove through the connecting hole, the air extraction valve is a one-way air valve, and the regulating chamber is filled with air.

[0021] According to the above technical solution, the length of the hollow plunger is the same as that of the outer mold base, and the bottom end of the hollow plunger is flush with the bottom end of the outer mold base, the outer wall of the hollow plunger fits with the inner wall of the inner support, and the negative pressure valve is a one-way valve.

[0022] Compared with the prior art, the invention has the following beneficial effects: the invention has a scientific and reasonable structure and is safe and convenient to use;

[0023] 1. A plastic die pressing mechanism is provided. By cooperating with a rotating seat, a slide groove, a driving block, a pressure roller, a limiting ear, a threaded rod, a threaded block and a limiting groove, a plastic bottom die structure can be constructed, and the blank can be dynamically stamped to effectively improve the stamping forming effect. On the one hand, the stamping size can be accurately limited by cooperating with a square shaft rod, a ruler, a gear and a gear ring, so that the outer diameter of the gas cylinder molding can be adjusted, which greatly improves the flexibility and convenience of the stamping work and can meet the processing requirements of different gas cylinder sizes. The stamping forming work of gas cylinders with different outer diameters can be realized by only one set of molds, which effectively expands the effective adaptability of the mold. On the other hand, it can realize step-by-step dynamic stamping of the blank, greatly reduce the difficulty of stamping, and avoid the local wear of the mold affecting the effectiveness of stamping. While improving the stamping accuracy and stamping efficiency, making the stamping work more stable and reliable, and improving the output quality of the product, it can reduce the load pressure borne by the mold during the buffering process, so that the mold can work more continuously and stably, and the effective service life of the mold is increased.

[0024] 2. Through the cooperation of the inner support, the outer die seat and the sealing ring, a hydraulic top die structure can be constructed, which can be used for preliminary stamping and forming of the flat blank. At the same time, the hydraulic pressure can be synchronously converted and utilized, and the hard mechanical connection is replaced by hydraulic filling, which effectively improves the efficiency and stability of pressure transmission in the stamping process, makes the pressure of the blank more balanced, and ensures the forming effect of the blank. In conjunction with the plastic bottom die structure, triple stamping of the blank can be achieved, integrating preliminary stamping and forming, secondary drawing and correction, and finishing pressure supplementation. In addition, the effect of graded dynamic stamping can fully guarantee the effectiveness and sufficiency of the stamping work, and greatly improve the forming quality of the gas cylinder blank. Through the cooperation of the intubation, the deflection guide box, the rotating disk, the through hole, the deflection groove, the pressure delivery pipe, the ring cavity, the guide hole, the side groove, the reset pipe, the hydraulic cylinder, the piston block and the guide pipe, a complete hydraulic fluid backflow circuit can be constructed, and the hydraulic pressure can be converted and utilized in multiple ways, which greatly enhances the connection smoothness and compatibility stability of the triple stamping work of the blank.

[0025] 3. It is equipped with a power-assistance guarantee mechanism. By cooperating with the monitoring cylinder, piston disc, circular convex block, boosting groove, same-pressure sliding cavity and top pressure column, a dynamic pressure comparison structure can be constructed to control the on and off of the switch in real time. The stamping pressure can be detected in real time during the stamping manufacturing process of seamless gas cylinders, and the stamping pressure threshold can be synchronously limited, which greatly improves the timeliness and effectiveness of the abnormal pressure response action, and can more quickly implement the prevention and control measures for abnormal pressure, fully guarantee the safety of the stamping pressure during the stamping process, improve the resistance of the mold to external disturbance factors, enhance the stability of the mold, and avoid damage to the mold and the blank while ensuring the stamping effect, thereby increasing the effective service life of the mold and improving the effective utilization rate of the blank;

[0026] Through the coordination of the screw, movable plug, adjustment chamber and guide groove, the actual safe stamping threshold in the stamping process can be limited and adjusted, and different downward pressure requirements can be met according to actual conditions, thereby improving the adaptability of the mold. In addition, due to the diversion and connection function of the flow tube, partition groove, connecting hole, external connection groove, air nozzle and exhaust valve, the safety pressure can be accurately regulated according to the air pressure indication number, which greatly improves the flexibility, convenience and efficiency of the adjustment work. While improving the adjustment accuracy, it can effectively enrich the adjustment means, expand the adjustable range, and further improve the convenience and adaptability of the mold. Through the coordination of the hollow plunger and the negative pressure valve, an air pumping structure can be constructed, which greatly enhances the convenience and efficiency of demoulding.

[0027] To sum up, this mold can perform triple-grade dynamic stamping on the blank, integrating blank forming, drawing correction and compensating pressure. It can dynamically adjust the forming size of the gas cylinder, greatly reduce the difficulty of stamping, and improve the forming size accuracy of the gas cylinder. While improving the uniformity and sufficiency of the blank pressure, the load pressure of the mold during the stamping process is greatly reduced, and the load pressure threshold during the stamping process can be synchronously detected and dynamically adjusted, so that the safety and reliability of the stamping work are enhanced, and the effective service life of the mold is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0029] In the attached picture:

[0030] Figure 1 It is a schematic diagram of the structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the installation structure of the rotating seat of the present invention;

[0032] Figure 3 It is a schematic diagram of the structure of the plastic die mechanism of the present invention;

[0033] Figure 4 It is a schematic diagram of the installation structure of the rotating disk of the present invention;

[0034] Figure 5 It is a schematic diagram of the installation structure of the drive block of the present invention;

[0035] Figure 6 It is a schematic diagram of the sealing ring installation structure of the present invention;

[0036] Figure 7 It is a schematic diagram of the structure of the power assistance and protection mechanism of the present invention;

[0037] Numbers in the figure: 100, base; 101, partition seat; 102, top seat; 103, material template; 104, lower die hole; 105, hydraulic cylinder;

[0038] 200, plastic die pressing mechanism; 201, rotating seat; 202, slide groove; 203, driving block; 204, pressing roller; 205, limiting ear; 206, threaded rod; 207, threaded block; 208, limiting groove; 209, inserting tube; 210, deflection guide box; 211, rotating disk; 212, through hole; 213, deflection groove; 214, pressure delivery pipe; 215, inner support; 216, outer die seat; 217, sealing ring; 218, ring cavity; 219, guide hole; 220, side groove; 221, reset tube; 222, hydraulic cylinder; 223, piston block; 224, delivery pipe; 225, square shaft rod; 226, ruler; 227, gear; 228, gear ring;

[0039] 300. Power assist mechanism; 301. Monitoring tube; 302. Piston disc; 303. Round bump; 304. Pressurization groove; 305. Same-pressure slide cavity; 306. Guide groove; 307. Flow pipe; 308. Top pressure column; 309. Partition groove; 310. Switch; 311. Screw; 312. Movable plug; 313. Adjustment cavity; 314. Connecting hole; 315. External connection groove; 316. Pressure gauge; 317. Air nozzle; 318. Air extraction valve; 319. Hollow plunger; 320. Negative pressure valve. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0041] Example: Figure 1-7As shown, the present invention provides a technical solution, a steel seamless gas cylinder manufacturing stamping die, comprising a base 100, a spacer 101 is installed on the top of the base 100, a top seat 102 is installed on the top of the spacer 101, a material template 103 is embedded and slidably installed on the side end surface of the spacer 101, a lower die hole 104 is opened on one side of the top of the material template 103, and a plastic pressing die mechanism 200 is installed at the bottom of the top seat 102;

[0042] The plastic die pressing mechanism 200 includes a rotating seat 201, a slide groove 202, a driving block 203, a pressing roller 204, a limiting ear 205, a threaded rod 206, a threaded block 207, a limiting groove 208, a plug 209, a deflection guide box 210, a rotating disk 211, a through hole 212, a deflection groove 213, a pressure delivery pipe 214, an inner support 215, an outer die seat 216, a sealing ring 217, a ring cavity 218, a guide hole 219, a side groove 220, a reset pipe 221, a hydraulic cylinder 222, a piston block 223, a guide pipe 224, a square shaft rod 225, a scale 226, a gear 227 and a gear ring 228;

[0043] A plurality of rotating seats 201 are evenly and evenly installed at the bottom edge of the spacer 101, and a plurality of slide grooves 202 are opened at equal angles along the circumferential direction on the inner wall of the rotating seat 201, and a driving block 203 is slidably installed inside the slide groove 202, and a pressing roller 204 is embedded and rotatably installed at the end of the driving block 203, and a limiting ear 205 is installed in the middle of the top of the driving block 203, and a threaded rod 206 is rotatably installed in the middle of the side end surface of the limiting ear 205, the diameter of the pressing roller 204 is greater than the width of the driving block 203, and the length of the driving block 203 is greater than the length of the threaded rod 206, and the inner diameter of the rotating seat 201 is the same as the inner diameter of the lower die hole 104, so as to make the molding size of the gas cylinder adjustable while replacing the limiting function of the bottom die, and equivalently construct a plastic bottom die;

[0044] A threaded block 207 is installed on the outer side of the threaded rod 206 through a thread, and a limiting groove 208 is provided at the position of the threaded block 207 corresponding to the outer curved surface of the rotating seat 201. A square shaft rod 225 is embedded and slidably installed at the end of the threaded rod 206. A scale 226 is installed at the bottom of the side end surface of the threaded block 207. The threaded block 207 fits with the limiting groove 208. The length of the scale 226 is equal to the sliding distance of the threaded block 207, and the length of the scale 226 is less than the inner diameter of the lower die hole 104, so as to accurately control the processing size of the gas cylinder and improve the efficiency and stability of the processing work. A gear 227 is installed at the end of the square shaft rod 225, and a gear ring 228 is rotatably installed at the position corresponding to the gear 227 on the top of the outer curved surface of the rotating seat 201;

[0045] A plurality of inserting tubes 209 are installed at equal angles along the circumferential direction at the bottom end of the rotating seat 201, a deflection guide box 210 is installed at the top edge of the base 100, a rotating disk 211 is rotatably installed inside the deflection guide box 210, and the inclined surface of the rotating disk 211 and the inner wall of the deflection guide box 210 are enclosed at equal angles along the circumferential direction to form a plurality of deflection grooves 213, a through hole 212 is opened in the middle of the inclined surface of the rotating disk 211, and the through hole 212 is connected to the slide groove 202 through the inserting tube 209, a pressure delivery pipe 214 is installed on one side of the top end of the deflection guide box 210, an inner support 215 is installed at the middle of the bottom end of the top seat 102 through a thread, an outer mold seat 216 is slidably installed on the outer side of the inner support 215, and the outer mold seat 216 is slidably connected to the partition seat 101;

[0046] A sealing ring 217 is installed at the bottom of the inner support 215 located inside the outer mold base 216. An annular cavity 218 is opened inside the inner support 215 at the position corresponding to the pressure delivery pipe 214, and the annular cavity 218 is connected with the inner cavity of the deflection guide box 210 through the pressure delivery pipe 214. A plurality of guide holes 219 are opened at equal angles along the circumferential direction at the bottom of the annular cavity 218. A reset tube 221 is installed at the top of the outer curved surface of the outer mold base 216.

[0047] The space at the bottom of the sealing ring 217 in the inner cavity of the outer die seat 216 is connected to the ring cavity 218 through the guide hole 219, and the space at the top of the sealing ring 217 in the inner cavity of the outer die seat 216 is connected to the reset tube 221 through the side groove 220, so as to carry out flow limiting guidance, ensure the smooth progress of stamping and drawing work while improving the stability of pressure, and the side groove 220 is opened at the position of the reset tube 221 on the side wall of the outer die seat 216, and a hydraulic cylinder 222 is installed at the bottom of the side end surface of the base 100, and the product of the length of the pressure roller 204 and the bottom area of ​​the sealing ring 217 is equal to the sum of the volumes of the offset grooves 213. The hydraulic cylinder 222 is filled with hydraulic fluid to ensure the effectiveness of stamping and drawing work and the sufficiency of the force on the workpiece, and the end of the reset tube 221 is connected to the top space of the inner cavity of the hydraulic cylinder 222;

[0048] A piston block 223 is slidably installed inside the hydraulic cylinder 222. The ratio of the top force area of ​​the sealing ring 217 to the bottom force area is equal to the ratio of the top force area of ​​the piston block 223 to the bottom force area. The ratio of the bottom force area of ​​the sealing ring 217 to the bottom force area of ​​the piston block 223 is equal to the ratio of the telescopic distance of the output shaft of the hydraulic cylinder 105 to the lifting distance of the outer mold base 216, so as to make the pressure transmission work more stable and smooth, and ensure the connection stability of the gas cylinder processing work. A guide pipe 224 is installed on the other side of the bottom end of the deflection guide box 210, and the guide pipe 224 is connected to the bottom space of the inner cavity of the hydraulic cylinder 222. A hydraulic cylinder 105 is installed in the middle of the top end of the hydraulic cylinder 222, and the end of the output shaft of the hydraulic cylinder 105 is connected to the piston block 223.

[0049] An assisting mechanism 300 is installed on the outside of the base 100, and the assisting mechanism 300 includes a monitoring cylinder 301, a piston disc 302, a circular convex block 303, a pressurizing groove 304, a same-pressure sliding cavity 305, a guide groove 306, a flow pipe 307, a top pressure column 308, a partition groove 309, a switch 310, a screw rod 311, a movable plug 312, an adjusting cavity 313, a connecting hole 314, an external connection groove 315, a pressure gauge 316, a gas nozzle 317, an exhaust valve 318, a hollow plunger 319 and a negative pressure valve 320;

[0050] A monitoring cylinder 301 is installed at the bottom of the other end surface of the base 100, a piston disc 302 is slidably installed inside the monitoring cylinder 301, a circular convex block 303 is installed at the middle of the bottom end of the piston disc 302, a pressurization groove 304 is opened at the position of the piston disc 302 inside the monitoring cylinder 301, a same-pressure slide cavity 305 is opened at the position of the circular convex block 303 inside the monitoring cylinder 301, a guide groove 306 is opened at a position on one side of the same-pressure slide cavity 305 inside the monitoring cylinder 301, a flow pipe 307 is installed at the position of the pressure delivery pipe 214 at the bottom end of the deflection guide box 210, and the flow pipe 307 is connected with the same-pressure slide cavity 305 through the guide groove 306;

[0051] A pressure column 308 is installed in the middle of the top of the piston disc 302, and the pressure column 308 is sealed and slidably connected with the monitoring tube 301. A partition groove 309 is opened inside the monitoring tube 301 at the position corresponding to the end of the pressure column 308. A switch 310 is embedded and installed at the top of the partition groove 309. The outer diameter of the piston disc 302 is ten times the outer diameter of the circular protrusion 303. The distance between the piston disc 302 and the switch 310 is equal to the length of the pressure column 308. The switch 310 is a control switch for the hydraulic cylinder 105 and an external alarm control switch. The input of the switch 310 The end is electrically connected to the output end of the external power supply so as to limit the safety pressure in the process of gas cylinder processing and improve the working stability and effective service life of the device. An adjusting chamber 313 is provided inside the monitoring tube 301 at the top of the partition groove 309. A movable plug 312 is slidably installed inside the adjusting chamber 313. A screw rod 311 is rotatably installed in the middle of the top of the monitoring tube 301, and the screw rod 311 is connected to the movable plug 312 through a thread. A plurality of connecting holes 314 are provided at equal angles along the circumferential direction at the bottom of the adjusting chamber 313.

[0052] An external connection groove 315 is provided inside the monitoring tube 301 between the boost groove 304 and the regulating chamber 313. A pressure gauge 316 is embedded in the middle of the side end surface of the external connection groove 315, a gas nozzle 317 is embedded in the bottom of the side end surface of the external connection groove 315, and an air extraction valve 318 is embedded in the top of the side end surface of the external connection groove 315. The movable plug 312 is elliptical. The boost groove 304 and the regulating chamber 313 are connected to the external connection groove 315 through the connecting hole 314. The air extraction valve 318 is a one-way air valve. The regulating chamber 313 is filled with air to improve the controllability of the safety air pressure and improve the regulating efficiency. In order to facilitate work, a hollow plunger 319 is embedded in the middle of the bottom end of the outer mold base 216, and the hollow plunger 319 is slidably connected to the inner support 215, and a negative pressure valve 320 is embedded in the middle of the top end of the inner support 215. The length of the hollow plunger 319 is the same as that of the outer mold base 216, and the bottom end of the hollow plunger 319 is flush with the bottom end of the outer mold base 216, and the outer wall of the hollow plunger 319 is matched with the inner wall of the inner support 215. The negative pressure valve 320 is a one-way valve to improve the stability and convenience of demolding work, make the demolding work more efficient and reliable, and improve the overall processing efficiency of gas cylinder processing work.

[0053] Working principle and use process of the present invention: When the stamping die for manufacturing seamless gas cylinders is actually used, firstly, the base 100 is stably placed on the ground, the material template 103 is pulled out, and the circular steel flat blank is placed into the lower die hole 104, and then the material template 103 is completely pushed into the spacer 101 and reset. At this time, the center of the circular steel flat blank is on the same axis as the center of the bottom surface of the outer die seat 216, the raw material filling work is completed, and the blank position is limited and corrected;

[0054] Then, the screw rod 311 is rotated to drive the movable plug 312 downward, forcing it to press the air in the regulating chamber 313 into the boosting groove 304 through the connecting hole 314, so that the air pressure in the boosting groove 304 rises. In this process, under the conduction of the connecting hole 314, the air pressure in the external connection groove 315 will rise and fall synchronously with the air pressure in the boosting groove 304, and the air pressure on the top of the piston plate 302 can be accurately adjusted according to the reading of the barometer 316;

[0055] In order to improve the convenience of using the device, when the mold leaves the factory, the regulating chamber 313 of each mold can be uniformly filled with air through the exhaust valve 318 according to the reading of the pressure gauge 316. At this time, the air pressure of the regulating chamber 313 of each mold is the basic safety air pressure. Before the mold is actually used, according to the actual processing conditions and processing requirements, the screw 311 is rotated through the above steps to drive the movable plug 312 to rise and fall. According to the reading of the pressure gauge 316, the air pressure on the top of the piston disc 302 can be accurately increased or decreased, and the air pressure on the top of the piston disc 302 can be fine-tuned;

[0056] When there is a special need, the regulating chamber 313 can be re-inflated through the air extraction valve 318, or the air inside the regulating chamber 313 can be released by pressing the air nozzle 317, and the air pressure on the top of the piston disc 302 can be compensated according to the reading of the barometer 316. At this time, the air pressure on the top of the piston disc 302 is the actual safety air pressure. In this process, it should be ensured that the actual safety air pressure is not higher than the theoretical safety air pressure;

[0057] Then, each gear ring 228 is rotated in turn, forcing each gear 227 to drive the square shaft rod 225 to rotate synchronously under the drive of the corresponding gear ring 228, and each threaded rod 206 will also rotate synchronously under the drive of the corresponding square shaft rod 225, forcing the threaded block 207 to slide correspondingly inside the limiting groove 208. According to the indication of the ruler 226, the position of the threaded block 207 is accurately limited to adjust the distance between the threaded block 207 and the bottom of the limiting groove 208. This distance is the feed distance of the pressure roller 204 during the stamping process. According to the indication of the ruler 226, the feed distance of the pressure roller 204 inside each rotating seat 201 is accurately adjusted, so that the feed distance of the pressure roller 204 inside each rotating seat 201 gradually increases from top to bottom, and the feed distance of the pressure roller 204 inside the bottom rotating seat 201 is equal to the difference between the inner diameter of the lower die hole 104 and the outer diameter of the gas cylinder;

[0058] In the actual stamping process, the circular steel flat blank will be pressed into a cylindrical shape under the limitation of the lower die hole 104, and then the pressure roller 204 will stamp the outer wall of the cylindrical blank again. When the pressing depth of the pressure roller 204 on the outer wall of the cylindrical blank reaches the feedable distance, the threaded block 207 will abut against the bottom of the limiting groove 208, so that the pressure roller 204 cannot feed a greater distance, that is, its punchable depth is its feedable distance. At this time, the difference between the inner diameter of the lower die hole 104 and the feedable distance of the pressure roller 204 is the outer diameter forming size of the cylindrical blank after passing through the current rotating seat 201. In conjunction with the outer die seat 216, the pressure roller 204 inside each rotating seat 201 can realize double and multiple stamping of the blank, reduce the difficulty of stamping, ensure stamping accuracy, integrate preliminary stamping and secondary drawing correction, and make the forming size of the gas cylinder controllable.

[0059] After completing the above adjustment work, the hydraulic cylinder 105 can be started to punch the gas cylinder. Its output shaft will drive the piston block 223 to press down, and the hydraulic fluid in the hydraulic cylinder 222 is pressed into the deflection groove 213 inside the deflection guide box 210 through the guide pipe 224, and squeezes the rotating disk 211 to force the rotating disk 211 to rotate. Then the hydraulic fluid will enter the annular cavity 218 through the pressure delivery pipe 214, and enter the inner cavity of the outer die seat 216 through the guide hole 219, filling the bottom cavity of the sealing ring 217, forcing the outer die seat 216 to slide down relative to the inner support 215 under the action of hydraulic pressure to squeeze the bottom circular steel flat blank. Under the limit of the lower die hole 104, the circular steel flat blank is pressed into a cylindrical shape and embedded in the inner side of the pressing roller 204.

[0060] During this process, the rotation of the rotating disk 211 will drive each rotating seat 201 to rotate synchronously through the insert pipe 209, so that each pressing roller 204 rotates around the cylindrical blank inside thereof, and under the conduction of the through hole 212, the hydraulic fluid will also synchronously pass through the insert pipe 209 into the slide 202 to squeeze the driving block 203, forcing the pressing roller 204 to squeeze the outer curved surface of the cylindrical blank. During the rotation of each pressing roller 204 around the cylindrical blank inside thereof, the cylindrical blank is stamped step by step as it descends;

[0061] Since the product of the length of the pressing roller 204 and the bottom area of ​​the sealing ring 217 is equal to the sum of the volumes of the offset grooves 213, that is, when the pressing distance of the outer die holder 216 is equal to the length of the pressing roller 204, the amount of hydraulic fluid pressed into the bottom cavity of the sealing ring 217 is sufficient to drive the pressing roller 204 to rotate around the cylindrical blank inside it for one circle, that is, when the pressing distance of the outer die holder 216 is equal to the length of the pressing roller 204, each pressing roller 204 rotates around the cylindrical blank inside it for at least one circle, and the pressing rollers 204 on the same rotating seat 201 cooperate with each other, so that the cylindrical blank inside it can be squeezed multiple times in the process of the cylindrical blank descending to the length of the pressing roller 204, and the number of squeezing times is not less than the number of pressing rollers 204 on the same rotating seat 201, thereby ensuring the adequacy and stability of the step-by-step stamping work;

[0062] Similarly, during the stamping process, under the conduction of the through-flow pipe 307, the hydraulic fluid flowing through the deflection guide box 210 will synchronously enter the guide groove 306, forcing the hydraulic pressure inside the same-pressure slide cavity 305 to rise synchronously. Under the conduction of the hydraulic pressure, the hydraulic pressure at the bottom of the circular protrusion 303 is the same as the hydraulic pressure at the bottom of the sealing ring 217. Under the effect of the difference in end surface area between the piston disc 302 and the circular protrusion 303, when the hydraulic pressure at the bottom of the circular protrusion 303 is sufficient to overcome the air pressure at the top of the piston disc 302, that is, when the hydraulic pressure value at the bottom of the circular protrusion 303 is one hundred times the actual safety air pressure value, the circular protrusion 303 will drive the piston disc 302 to rise under the effect of the hydraulic pressure.

[0063] At this time, the hydraulic pressure at the bottom of the circular protrusion 303 exceeds the set actual safety pressure, that is, the hydraulic pressure at the bottom of the sealing ring 217 exceeds the actual safety value. At this time, the top pressure column 308 will trigger the switch 310, and the switch 310 will shut down the hydraulic cylinder 105 and send an early warning signal to the outside to limit the pressure threshold during the stamping process to avoid damage to the mold under external interference or abnormal conditions;

[0064] After the stamping work is completed, the hydraulic cylinder 105 is controlled to reset, driving the piston block 223 to rise, and the hydraulic fluid on its top will be pressed into the outer die seat 216 from the reset tube 221, and filled into the top space of the sealing ring 217 through the side groove 220, forcing the outer die seat 216 to rise and reset relative to the inner support 215. At this time, the hydraulic fluid at the bottom of the sealing ring 217 will be pressed back to the hydraulic cylinder 222 along the original route, and in this process, the rotating disk 211 will be used to drive each rotating seat 201 to rotate again, and the internal blank will be subjected to triple supplementary extrusion by the pressing roller 204 to finish;

[0065] During the descent of the outer mold base 216, the hollow plunger 319 will be driven to descend synchronously, so that the hollow plunger 319 will slide down relative to the inner support 215, causing the internal space of the inner support 215 to expand, forming a negative pressure at the negative pressure valve 320, and forcing the external air to enter the internal space of the inner support 215 through the negative pressure valve 320. During the ascent of the outer mold base 216, the hollow plunger 319 will also rise synchronously, which will squeeze the top air, forcing the air to be ejected from its bottom opening and fill the gap between the outer mold base 216 and the cylindrical blank, pushing the cylindrical blank so that the cylindrical blank falls into the base 100, and the demolding work can be carried out stably.

[0066] Finally, it should be noted that the above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A stamping die for manufacturing seamless steel gas cylinders, comprising a base (100), characterized in that: A spacer (101) is installed on the top of the base (100), a top seat (102) is installed on the top of the spacer (101), a material template (103) is embedded and slidably installed on the side end surface of the spacer (101), a lower mold hole (104) is opened on one side of the top end of the material template (103), and a plastic pressing mold mechanism (200) is installed on the bottom of the top seat (102); The plastic die pressing mechanism (200) comprises a rotating seat (201); A plurality of rotating seats (201) are equidistantly and evenly mounted on the bottom edge of the partition seat (101) for rotation; a plurality of slide grooves (202) are provided on the inner wall of the rotating seat (201) at equal angles along the circumferential direction; a driving block (203) is slidably mounted inside the slide groove (202); a pressure roller (204) is rotatably mounted on the end of the driving block (203); a limiting ear (205) is rotatably mounted on the middle of the top end of the driving block (203); a threaded rod (206) is rotatably mounted on the middle of the side end surface of the limiting ear (205); and the threaded rod A threaded block (207) is installed on the outer side of (206) by means of a thread, a limiting groove (208) is provided at a position of the threaded block (207) corresponding to the outer curved surface of the rotating seat (201), a square shaft (225) is embedded and slidably installed at the end of the threaded rod (206), a scale (226) is installed at the bottom of the side end surface of the threaded block (207), a gear (227) is installed at the end of the square shaft (225), and a gear ring (228) is rotatably installed at a position corresponding to the gear (227) on the top of the outer curved surface of the rotating seat (201); A plurality of inserting tubes (209) are installed at equal angles along the circumferential direction at the bottom end of the rotating seat (201); a deflection guide box (210) is installed at the top edge of the base (100); a rotating disk (211) is rotatably installed inside the deflection guide box (210); and the inclined surface of the rotating disk (211) and the inner wall of the deflection guide box (210) are enclosed at equal angles along the circumferential direction to form a plurality of deflection grooves (213); a through hole (212) is opened in the middle of the inclined surface of the rotating disk (211), and the through hole (212) is connected to the slide groove (202) through the inserting tube (209); a pressure delivery pipe (214) is installed on one side of the top end of the deflection guide box (210); an inner support (215) is installed at the middle of the bottom end of the top seat (102) through a thread; an outer mold seat (216) is slidably installed on the outer side of the inner support (215), and the outer mold seat (216) is slidably connected to the partition seat (101); The diameter of the pressure roller (204) is greater than the width of the driving block (203), the length of the driving block (203) is greater than the length of the threaded rod (206), and the inner diameter of the rotating seat (201) is the same as the inner diameter of the lower die hole (104).

2. A stamping die for manufacturing seamless steel gas cylinders according to claim 1, characterized in that: The bottom end of the inner support (215) is located inside the outer mold base (216) and is provided with a sealing ring (217); an annular cavity (218) is provided inside the inner support (215) at a position corresponding to the pressure delivery pipe (214), and the annular cavity (218) is connected to the inner cavity of the deflection guide box (210) through the pressure delivery pipe (214); a plurality of guide holes (219) are provided at the bottom end of the annular cavity (218) at equal angles along the circumferential direction; a reset tube (221) is provided on the top of the outer curved surface of the outer mold base (216); and a side wall of the outer mold base (216) is provided at a position corresponding to the reset tube (221). A side groove (220), a hydraulic cylinder (222) is installed at the bottom of the side end surface of the base (100), and the end of the reset tube (221) is connected to the top space of the inner cavity of the hydraulic cylinder (222), a piston block (223) is slidably installed inside the hydraulic cylinder (222), a guide tube (224) is installed on the other side of the bottom end of the deflection guide box (210), and the guide tube (224) is connected to the bottom space of the inner cavity of the hydraulic cylinder (222), a hydraulic cylinder (105) is installed in the middle of the top end of the hydraulic cylinder (222), and the end of the output shaft of the hydraulic cylinder (105) is connected to the piston block (223).

3. A stamping die for manufacturing seamless steel gas cylinders according to claim 2, characterized in that: The product of the length of the pressure roller (204) and the bottom area of ​​the sealing ring (217) is equal to the sum of the volumes of the offset grooves (213), and the hydraulic cylinder (222) is filled with hydraulic fluid; The space in the inner cavity of the outer mold base (216) located at the bottom of the sealing ring (217) is communicated with the ring cavity (218) through the guide hole (219), and the space in the inner cavity of the outer mold base (216) located at the top of the sealing ring (217) is communicated with the reset tube (221) through the side groove (220).

4. A stamping die for manufacturing seamless steel gas cylinders according to claim 2, characterized in that: The ratio of the top force-bearing area of ​​the sealing ring (217) to the bottom force-bearing area is equal to the ratio of the top force-bearing area of ​​the piston block (223) to the bottom force-bearing area, and the ratio of the bottom force-bearing area of ​​the sealing ring (217) to the bottom force-bearing area of ​​the piston block (223) is equal to the ratio of the telescopic distance of the output shaft of the hydraulic cylinder (105) to the lifting distance of the outer mold base (216).

5. A stamping die for manufacturing seamless steel gas cylinders according to claim 1, characterized in that: The threaded block (207) fits into the limiting groove (208), the length of the scale (226) is equal to the sliding distance of the threaded block (207), and the length of the scale (226) is smaller than the inner diameter of the lower die hole (104).

6. A stamping die for manufacturing seamless steel gas cylinders according to claim 1, characterized in that: An assisting and guaranteeing mechanism (300) is installed on the outside of the base (100), and the assisting and guaranteeing mechanism (300) comprises a monitoring cylinder (301); A monitoring tube (301) is installed at the bottom of the other end surface of the base (100), a piston disc (302) is slidably installed inside the monitoring tube (301), a circular protrusion (303) is installed at the middle of the bottom end of the piston disc (302), a pressure boosting groove (304) is opened inside the monitoring tube (301) at a position corresponding to the piston disc (302), a same-pressure sliding cavity (305) is opened inside the monitoring tube (301) at a position corresponding to the circular protrusion (303), a guide groove (306) is opened inside the monitoring tube (301) at a position on one side of the same-pressure sliding cavity (305), a flow pipe (307) is installed at a position corresponding to the pressure delivery pipe (214) at the bottom end of the deflection guide box (210), and the flow pipe (307) is connected to the same-pressure sliding cavity (305) through the guide groove (306); A pressure column (308) is installed in the middle of the top of the piston disc (302), and the pressure column (308) is sealingly and slidably connected to the monitoring tube (301); a partition groove (309) is provided inside the monitoring tube (301) at a position corresponding to the end of the pressure column (308); a switch (310) is embedded and installed at the top of the partition groove (309); an adjustment chamber (313) is provided inside the monitoring tube (301) at the top of the partition groove (309); a movable plug (312) is slidably installed inside the adjustment chamber (313); a screw rod (311) is embedded and rotatably installed in the middle of the top of the monitoring tube (301), and the screw rod (311) is connected to the movable plug (312) through a thread; and a plurality of connection holes (314) are provided at the bottom of the adjustment chamber (313) at equal angles along the circumferential direction; An external connection groove (315) is provided inside the monitoring tube (301) at a position between the boost groove (304) and the regulating chamber (313); a pressure gauge (316) is embedded in the middle of the side end surface of the external connection groove (315); a gas nozzle (317) is embedded in the bottom of the side end surface of the external connection groove (315); an air extraction valve (318) is embedded in the top of the side end surface of the external connection groove (315); a hollow plunger (319) is embedded in the middle of the bottom end of the outer mold base (216), and the hollow plunger (319) is slidably connected to the inner support (215); and a negative pressure valve (320) is embedded in the middle of the top end of the inner support (215).

7. A stamping die for manufacturing seamless steel gas cylinders according to claim 6, characterized in that: The outer diameter of the piston disc (302) is ten times the outer diameter of the circular protrusion (303); the distance between the piston disc (302) and the switch (310) is equal to the length of the top pressure column (308); the switch (310) is a hydraulic cylinder (105) control switch and an external alarm control switch; the input end of the switch (310) is electrically connected to the output end of the external power supply.

8. A stamping die for manufacturing seamless steel gas cylinders according to claim 6, characterized in that: The movable plug (312) is elliptical in shape, the pressurizing groove (304) and the regulating chamber (313) are both connected to the external connection groove (315) via a connecting hole (314), the air extraction valve (318) is a one-way air valve, and the regulating chamber (313) is filled with air.

9. A stamping die for manufacturing seamless steel gas cylinders according to claim 6, characterized in that: The length of the hollow plunger (319) is the same as that of the outer mold base (216), and the bottom end of the hollow plunger (319) is flush with the bottom end of the outer mold base (216). The outer wall of the hollow plunger (319) fits with the inner wall of the inner support (215), and the negative pressure valve (320) is a one-way valve.

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