An automated iron can punching machine capable of rapid die change

Abstract

The invention relates to an automatic iron can punching machine capable of fast mold change, comprising a frame, a punching device, a mold and a mold mounting frame, wherein the frame comprises a bed mold placing part, the bed is located above the mold placing part, the punching device is fixed on the bed, the mold is detachably connected to the mold placing part, one end of the mounting frame is fixed on the frame and the other end is detachably connected to the mold; the mold placing part comprises a mold placing table, a fixed threaded column and a mold fixing block, the punching device comprises a punching power part and a pressing plate, the output end of the punching power part is fixedly connected with the pressing plate, the mold is placed on the mold placing table, fixed threaded columns are fixed on both sides of the mold, the mold fixing block is detachably connected to the fixed threaded column and then fixedly connected to the mold, when the mold needs to be changed, the mold only needs to be disassembled from the mold placing table and the mold mounting frame respectively, thereby realizing the replacement of different molds on one machine, thereby overcoming the problem of one iron can forming equipment having only one mold per machine.

Description

Technical Field

[0001] The invention belongs to the technical field of iron can forming machines, and in particular relates to an automatic iron can punching machine capable of quickly changing molds. Background Art

[0002] Tin cans are widely used in our production and life. They have very good airtightness and can withstand high internal pressure, which can ensure that the products in the cans are not easy to expire. In the production and processing of tin cans, both ends of the tin cans need to be formed by bottom buckle and winding. The existing tin can forming equipment is often a set of molds matched with a stamping machine, but with the continuous improvement of market requirements for tin can shape, the existing forming equipment cannot meet the requirements of one stamping machine adapting to multiple molds. Summary of the invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is that the existing iron can forming equipment cannot satisfy the requirement that one punching machine is adapted to multiple molds.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: an automatic iron can punching machine capable of rapid mold change, comprising a frame, a punching device for applying downward pressure, a mold for fixing and assisting the punching device to form a model, and a mold mounting frame for fixing and pulling the mold body away from or close to the punching device, the frame comprising a bed for mounting the punching device and a mold placing part for mounting the mold, the bed being located above the mold placing part, the punching device being fixed on the bed, the mold being detachably connected to the mold placing part, one end of the mounting frame being fixed on the frame and the other end being detachably connected to the mold;

[0005] The mold placing part includes a mold placing table, fixed threaded columns and a mold fixing block. The stamping device includes a stamping power unit and a pressure plate. The output end of the stamping power unit is fixedly connected to the pressure plate. The mold placing table is located below the pressure plate. The mold is placed on the mold placing table. Several fixed threaded columns are fixed on both sides of the mold. The mold fixing block is detachably connected to the fixed threaded columns and then fixedly connected to the mold.

[0006] Furthermore, the mold includes a receiving base plate for connecting to the mold placing table, a clamping plate for making the expansion and contraction mold core assembly slide forward and backward, the expansion and contraction mold core assembly, a front clamping mold for fixing the model, and a rear clamping mold matching the front clamping mold. The receiving base plate is placed on the mold placing table and is detachably fixedly connected to the mold placing table through a mold fixing block. There is a pair of clamping plates, which are parallel and located above the receiving base plate. The clamping plate is fixedly connected to the receiving base plate. The expansion and contraction mold core assembly is located in the middle of the two clamping plates and is slidably connected to the clamping plate. The front clamping mold is fixed on the receiving base plate at a position below the pressure plate, and the rear clamping mold is fixed on the expansion and contraction mold core assembly. When the expansion and contraction mold core moves to below the pressure plate, the front clamping mold and the rear clamping mold form a frame shape and cover the four sides of the model.

[0007] Furthermore, the expansion and contraction mold core assembly includes a lower mold core, a lower mold core bottom plate, a slider, an expansion and contraction block and a control arm, the lower mold core bottom plate is placed on the receiving bottom plate, the sliders are located on both sides of the receiving bottom plate and are fixedly connected to the receiving bottom plate, the clamping plate is provided with a sliding groove in the direction toward the lower mold core bottom plate, the slider is engaged in the sliding groove, a telescopic groove is provided in the middle of the top surface of the lower mold core bottom plate, the expansion and contraction block is located in the middle of the telescopic groove and the bottom is rotatably connected to the lower mold core bottom plate, a control arm is fixedly connected to the side of the expansion and contraction block, and the control arm extends from the side plate of the lower mold core bottom plate away from the front clamping die direction, the lower mold core has four pieces and is located around the expansion and contraction block, a receiving groove is provided in the lower mold core, and springs are penetrated and fixed in the two adjacent lower mold core receiving grooves, and the rear clamping die is located at the front part above the receiving bottom plate and is fixedly connected to the receiving bottom plate.

[0008] Furthermore, the front clamping mold includes a front clamping block, a front clamping block, a rotating block, a fixing bolt and a spring, the front clamping block is fixed just below the pressure plate above the receiving base plate, the front clamping block is provided with rotating grooves on the left and right sides, the front clamping blocks have two and are located on both sides of the front clamping block, one end of the front clamping block close to the rotating groove is fixedly connected with a rotating block, the rotating block is placed in the rotating groove and is rotatably connected to the front clamping block, the fixing bolts are located on both sides of the front clamping block and on both sides of the front clamping block and are fixedly connected to the front clamping block, the two ends of the spring are respectively fixedly connected to the bolts of the front clamping block and the bolts of the front clamping block, the front clamping block is provided with an inclined surface at the position facing the rear clamping mold, and the rear clamping mold is provided with a matching inclined surface at the position facing the front clamping block.

[0009] Furthermore, the mold base also includes a roller needle, and a roller groove is provided on the top surface of the receiving base plate at a position corresponding to the middle of the two clamping plates, and a roller needle is placed in the roller groove, and the roller needle is rotatably connected to the receiving base plate.

[0010] Furthermore, the mold mounting frame includes a telescopic power member, a first fixed plate, a second fixed plate, a third fixed plate, a buffer connecting plate, a sliding rod and a threaded connecting rod, the second fixed plate is fixed on the frame, the first fixed plate is located behind the first fixed plate, the telescopic power member is fixed on the frame and the telescopic end is fixedly connected to the first fixed plate, one end of the sliding rod passes through the second fixed plate and is fixedly connected to the first fixed plate, the other end of the sliding rod is fixedly connected to the buffer connecting plate, the third fixed plate is detachably connected to the expansion and contraction mold core assembly, one end of the threaded connecting rod is fixedly connected to the third fixed plate and the other end is fixedly connected to the buffer connecting plate.

[0011] Furthermore, the mold mounting frame also includes a buffer rod, which is fixed on the buffer connecting plate and has a contact surface between the buffer end and the second fixing plate.

[0012] Furthermore, the telescopic power member is a cylinder, and a piston rod of the cylinder passes through the second fixing plate and is fixedly connected to the first fixing plate.

[0013] Furthermore, the buffer rod is composed of a hydraulic buffer.

[0014] Furthermore, a thread is provided on a side surface of the threaded connecting rod, one end of the threaded connecting rod passes through a third fixing plate, and nuts are threadedly connected to both side surfaces of the threaded connecting rod passing through the third fixing plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention designs the part of the equipment responsible for traction as a mold mounting frame that can be detached and installed with the mold, and then uses a fixed threaded column combined with a mold fixing block to realize a detachable connection between the mold and the mold placing part. When the mold needs to be changed, it is only necessary to disassemble the mold from the mold placing table and the mold mounting frame respectively. In this way, different molds can be replaced on one machine, thereby overcoming the problem of the existing iron can forming equipment having only one mold on one machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a side cross-sectional view of the mold placing table and the mold after being combined according to the present invention;

[0019] Figure 3 for Figure 2 A partial enlarged view of part A;

[0020] Figure 4 It is a schematic diagram of the top view of the grinding tool of the present invention;

[0021] Figure 5 It is a schematic diagram of the top view of the front clamping mold of the present invention;

[0022] Figure 6 It is a side structural schematic diagram of the front clamping mold of the present invention;

[0023] Figure 7 It is a schematic diagram of the top view of the expansion and contraction model assembly of the present invention;

[0024] Figure 8 It is a structural schematic diagram of the mold mounting frame of the present invention;

[0025] Fig. 9 is a schematic structural diagram of a second fixing plate of the present invention;

[0026] Fig.10 It is a schematic structural diagram of the buffer connecting plate of the present invention.

[0027] Markings in the figure: 110, bed; 120, die placement part; 121, die placement platform; 122, fixed threaded column; 123, die fixing block; 124, cushion block; 200, punching device; 210, pressing plate; 300, die; 310, receiving bottom plate; 320, clamping plate; 321, sliding groove; 330, needle roller; 340, rolling groove; 350, guardrail; 361, lower die core; 362, lower die core bottom plate; 363, slider; 364, telescopic groove; 365, expansion and contraction block; 366, control arm; 3 70, front clamping die; 371, front clamping block; 372, rotating block; 373, fixing bolt; 374, spring; 375, front clamping block; 376, rotating groove; 380, rear clamping die; 400, mold mounting frame; 410, telescopic power part; 420, first fixing plate; 430, second fixing plate; 431, first through hole; 432, second through hole; 440, third fixing plate; 450, sliding rod; 460, buffer connecting plate; 461, buffer fixing hole; 470, buffer rod; 480, threaded connecting rod. DETAILED DESCRIPTION

[0028] In order to make the above features and advantages of the present invention more obvious and easy to understand, embodiments are given below with reference to the accompanying drawings for detailed description as follows.

[0029] like Figure 1-10 As shown, this embodiment provides an automated iron can stamping machine capable of rapid mold change, including a frame, a stamping device 200 for applying downward pressure, a mold 300 for fixing a workpiece and assisting the stamping device 200 to form the workpiece, and a mold mounting frame 400 for fixing and pulling the mold body away from or close to the stamping device 200, wherein the stamping device 200 includes a stamping power unit and a pressing plate 210, and the output end of the stamping power unit is fixedly connected to the pressing plate 210.

[0030] The frame includes a bed 110 for installing the punching device 200 and a die placing part 120 for installing the mold 300. The bed 110 is located above the die placing part 120. The punching device 200 is installed on the bed 110. The punching device 200 is a conventional crank slider mechanism, which drives the pressure plate 210 to move up and down. The crank of the punching device 200 is installed on the bed through a bearing, and the slider of the punching device slides up and down along the bed. It is not repeated here. The mold 300 is detachably connected to the die placing part 120. The detachable structure of the mold 300 and the die placing part 120 is detailed below. One end of the mold mounting frame 400 is fixed to the frame and the other end is detachably connected to the mold 300. In this way, when the mold needs to be changed, it is only necessary to replace the mold 300 and then detachably connect the mold 300 to the die placing part 120 and the mold mounting frame 400, so that one machine and its matching multiple molds are realized, and flexible production is realized.

[0031] The mold placing part 120 includes a mold placing table 121, fixed threaded columns 122, a cushion block 124 and a mold fixing block 123. The mold placing table 121 is located below the pressure plate 210. The mold 300 is placed on the mold placing table 121. A plurality of fixed threaded columns 122 are fixed on both sides of the mold 300. The mold fixing block 123 is threadedly connected to the fixed threaded columns 122 and pressed on the top of the two ends of the mold 300 to form a fixation. By combining the fixed threaded columns 122 with the mold fixing block 123, the mold 300 with different edge thicknesses can be fixed to improve adaptability. The cushion block 124 is placed on the other side of the mold fixing block 123 to enhance the stability of the mold fixing block 123.

[0032] The mold 300 includes a mold body and a mold base. The mold base is used for a receiving bottom plate 310 connected to the mold placing platform 121, a clamping plate 320 and a guardrail 350 for sliding the expansion and contraction mold core assembly forward and backward. The mold body includes an expansion and contraction mold core assembly, a front clamping mold 370 for fixing the model, and a rear clamping mold 380 matching the front clamping mold 370. The receiving bottom plate 310 is placed on the mold placing platform 121 and is detachably fixedly connected to the mold placing platform 121 through a mold fixing block 123. The clamping plate 320 There is a pair of two clamping plates 320 which are parallel and located above the receiving bottom plate 310. The clamping plates 320 are fixedly connected to the receiving bottom plate 310. The expansion and contraction mold core assembly is located in the middle of the two clamping plates 320 and is slidably connected to the clamping plates 320. The front clamping mold 370 is fixed on the receiving bottom plate 310 at a position below the pressing plate 210. The rear clamping mold 380 is fixed on the expansion and contraction mold core assembly. When the expansion and contraction mold core assembly moves to the bottom of the pressing plate 210, the front clamping mold 370 and the rear clamping mold 380 are combined into a frame shape and covered around the model. The expansion and contraction mold core assembly can stably move toward the bottom of the pressing plate 210 through the sliding connection between the clamping plates 320 and the expansion and contraction mold core assembly. The front clamping mold 370 and the rear clamping mold 380 are molded by splicing to make it more convenient to place the model. The guardrail 350 is arched and fixedly connected to the receiving bottom plate 310 at both ends. The guardrail 350 is used to remind and protect the operator.

[0033] Furthermore, the mold base also includes a roller needle 330, and a rolling groove 340 is provided at a position between the two clamping plates 320 corresponding to the top surface of the receiving base plate 310, and the roller needle 330 is placed in the rolling groove 340. The roller needle 330 is rotatably connected to the receiving base plate 310. The combination of the roller needle 330 and the rolling groove 340 enables the expansion and contraction mold core assembly to move forward and backward more smoothly.

[0034] The expansion and contraction mold core assembly includes a lower mold core 361, a lower mold core bottom plate 362, a slider 363, an expansion and contraction block 365 and a control arm 366. The lower mold core bottom plate 362 is placed on the receiving bottom plate 310. The sliders 363 are located on both sides of the receiving bottom plate 310 and are fixedly connected to the receiving bottom plate 310. The clamping plate 320 is provided with a sliding groove 321 toward the lower mold core bottom plate 362. The slider 363 is engaged in the sliding groove 321. A telescopic groove 364 is provided in the middle of the top surface of the lower mold core bottom plate 362. The expansion and contraction block 365 is located at the receiving bottom plate 310. The expansion block 365 is fixedly connected to the side of the control arm 366 at the middle of the telescopic slot 364 and the bottom thereof, and extends from the side plate of the lower mold core bottom plate 362 away from the front clamping die 370. The lower mold core 361 has four pieces and is located around the expansion block 365. A receiving slot is provided in the lower mold core 361, and springs 374 are passed through and fixed in the receiving slots of two adjacent lower mold cores 361. The rear clamping die 380 is fixedly located above the receiving bottom plate 310 and is fixedly connected to the receiving bottom plate 310. The expansion block 365 is rotatably connected to the lower mold core bottom plate 362, and then the expansion block 365 is controlled to rotate by the control arm 366. The spring 374 is used to ensure that the lower mold core 361 is always covered around the expansion block 365. Then, after the expansion block 365 is rotated, the center distance between the lower mold core 361 and the expansion block 365 changes, thereby adjusting the outer area of ​​the lower mold core 361. This principle is used to shrink the periphery of the lower mold core 361 when releasing the mold. After the mold is released, the control arm 366 is rotated to drive the expansion block 365 to rotate, so that the outer area of ​​the lower mold core 361 is increased so that it fits with the inner wall of the model, which facilitates mold release.

[0035] The front clamping mold 370 includes a front clamping block 375, a front clamping block 371, a rotating block 372, a fixing bolt 373 and a spring 374. The front clamping block 375 is fixed just below the pressure plate 210 above the receiving bottom plate 310. The front clamping block 375 has rotating grooves 376 on the left and right sides. The front clamping block 371 has two and is located on both sides of the front clamping block 375. The end of the front clamping block 371 close to the rotating groove 376 is fixedly connected to the rotating block 372. 2 is placed in the rotation groove 376 and is rotatably connected to the front clamping block 375. The fixing bolt 373 is located on both sides of the front clamping block 375 and both sides of the front clamping block 371 and is fixedly connected to the front clamping block 371. The two ends of the spring 374 are respectively fixedly connected to the bolts of the front clamping block 375 and the bolts of the front clamping block 371. The position of the front clamping block 371 facing the rear clamping die 380 is provided with an inclined surface, and the position of the rear clamping die 380 facing the front clamping block 371 is provided with a matching inclined surface. The rotation groove 376 and the rotation block 372 enable the front clamping block 371 to rotate left and right in a small arc, and then the front clamping block 371 is pulled in both directions by the spring 374 to prevent the front clamping block 371 from interfering with the rear clamping die 380 when moving in the direction of the inclined surface of the rear clamping die 380. When closing the mold, the front clamping block 371 cooperates with the inclined surface of the rear clamping die 380 to quickly close the mold. When parting the mold, it is only necessary to move the rear clamping die 380 backward.

[0036] The mold mounting frame 400 includes a telescopic power member 410, a first fixing plate 420, a second fixing plate 430, a third fixing plate 440, a buffer connecting plate 460, a buffer rod 470, a sliding rod 450 and a threaded connecting rod 480. The second fixing plate 430 is fixed on the frame, the first fixing plate 420 is located behind the second fixing plate 430, the second fixing plate 430 is provided with a first through hole 431 in the middle and second through holes 432 on both sides, the telescopic power member 410 is fixed on the frame and the telescopic end passes through the first through hole 431 and is fixedly connected to the first fixing plate 420. One end of the sliding rod 450 passes through the second through hole 432 of the second fixed plate 430 and is fixedly connected to the first fixed plate 420, and the other end of the sliding rod 450 is fixedly connected to the buffer connecting plate 460. The third fixed plate 440 is detachably connected to the expansion and contraction mold core assembly. One end of the threaded connecting rod 480 is fixedly connected to the third fixed plate 440 and the other end is fixedly connected to the buffer connecting plate 460. The buffer connecting plate 460 is provided with a buffer fixing hole 461, and the buffer rod 470 is fixed to the buffer connecting plate 460 through the buffer fixing hole 461 and the buffer end has a contact surface with the second fixed plate 430. When it is necessary to move the mold 300 forward, start the telescopic power member 410 to extend the telescopic power member 410, and the telescopic power member 410 pushes the first fixed plate 420 to move, and the first fixed plate 420 drives the sliding rod 450 to move, and the sliding rod 450 drives the buffer connecting plate 460, and the buffer connecting plate 460 drives the threaded connecting rod 480, thereby driving the third fixed plate 440 and the mold 300 connected to the first fixed plate 420 to move. The same is true when moving backward. The buffer rod 470 is used to top the second fixed plate 430 for buffering to prevent the mold 300 from being damaged due to excessive impact when the mold 300 moves forward.

[0037] Furthermore, the threaded connecting rod 480 is provided with threads on the side, and one end of the threaded connecting rod 480 passes through the third fixed plate 440. The threaded connecting rod 480 passes through the third fixed plate 440 and both sides thereof are threadedly connected with nuts. The threaded connecting rod 480 combined with the nut facilitates the adjustment of the forward movement distance of the mold 300 to adapt to molds 300 of different sizes.

[0038] Furthermore, the telescopic power member 410 is a cylinder, a hydraulic lever or an electric push rod, and the piston rod of the telescopic power member 410 passes through the second fixing plate 430 and is fixedly connected to the first fixing plate 420 .

[0039] Furthermore, the buffer rod 470 is formed by a hydraulic buffer, which is relatively common and easy to replace.

[0040] Working principle: When the mold needs to be changed, first separate the mold fixing block 123 from the fixed threaded column 122, then separate the third fixed plate 440 from the lower mold core bottom plate 362, and finally separate the third fixed plate 440 from the threaded connecting rod 480. If the size of the expansion and contraction core assembly to be replaced is compatible with the clamping plate 320, only the expansion and contraction core assembly needs to be replaced. If it does not match, remove the entire assembly from the mold placement platform 121. At this time, fix the receiving bottom plate 310 of the new mold 300 on the mold placement platform 121 through the mold fixing block 123, and then engage the slider 363 of the expansion and contraction core assembly into the clamping groove of the clamping plate 320, then connect the third fixed plate 440 with the threaded connecting rod 480, and finally fix the third fixed plate 440 to the lower mold core bottom plate 362 of the expansion and contraction core assembly.

[0041] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automated iron can punching machine capable of rapid die change, characterized in that: It comprises a frame, a punching device for applying downward pressure, a mold for fixing and assisting the punching device to form a model, and a mold mounting frame for fixing and pulling the mold body away from or close to the punching device, the mold comprises a mold body and a mold base which are slidably connected to each other, the frame comprises a bed for mounting the punching device and a die placing part for mounting the mold body, the bed is located above the die placing part, the punching device is fixed on the bed, the mold base is detachably connected to the die placing part, and one end of the mounting frame is fixed on the frame and the other end is detachably connected to the mold; The die placing part includes a die placing platform, a fixed threaded column and a die fixing block, the stamping device includes a stamping power unit and a pressing plate, the output end of the stamping power unit is fixedly connected to the pressing plate, the die placing platform is located below the pressing plate, the die is placed on the die placing platform, a plurality of fixed threaded columns are fixed on both sides of the die, and the die fixing block is fixedly connected to the die after being detachably connected to the fixed threaded column; The mold base includes a receiving bottom plate for connecting with the mold placing table, a clamping plate for making the expansion and contraction mold core assembly slide forward and backward, the mold body includes the expansion and contraction mold core assembly, a front clamping mold for fixing the model and a rear clamping mold matching the front clamping mold, the receiving bottom plate is placed on the mold placing table and is detachably fixedly connected to the mold placing table through a mold fixing block, there is a pair of clamping plates, the two clamping plates are parallel and located above the receiving bottom plate, the clamping plate is fixedly connected to the receiving bottom plate, the expansion and contraction mold core assembly is located in the middle of the two clamping plates and is slidably connected to the clamping plates, the front clamping mold is fixed on the receiving bottom plate at a position below the pressure plate, the rear clamping mold is fixed on the expansion and contraction mold core assembly, when the expansion and contraction mold core moves to below the pressure plate, the front clamping mold and the rear clamping mold form a frame shape and cover the four sides of the model; The front clamping die comprises a front clamping block, a front clamping block, a rotating block, a fixing bolt and a spring, the front clamping block being fixed just below the pressure plate above the receiving bottom plate, the front clamping block is provided with rotating grooves on the left and right sides, the front clamping blocks have two and are located on both sides of the front clamping block, one end of the front clamping block close to the rotating groove is fixedly connected with a rotating block, the rotating block is placed in the rotating groove and rotatably connected to the front clamping block, the fixing bolts are located on both sides of the front clamping block and on both sides of the front clamping block and are fixedly connected to the front clamping block, the two ends of the spring are respectively fixedly connected to the bolts of the front clamping block and the bolts of the front clamping block, the position of the front clamping block facing the rear clamping die is provided with an inclined surface, and the position of the rear clamping die facing the front clamping block is provided with a matching inclined surface, and the openings of the two front clamping blocks shrink when they move in the direction of the rear clamping die.

2. The automatic iron can punching machine capable of rapid die change according to claim 1, characterized in that: The expansion and contraction mold core assembly includes a lower mold core, a lower mold core bottom plate, a slider, an expansion and contraction block and a control arm, the lower mold core bottom plate is placed on the receiving bottom plate, the sliders are located on both sides of the receiving bottom plate and are fixedly connected to the receiving bottom plate, the clamping plate is provided with a sliding groove in the direction toward the lower mold core bottom plate, the slider is engaged in the sliding groove, a telescopic groove is provided in the middle of the top surface of the lower mold core bottom plate, the expansion and contraction block is located in the middle of the telescopic groove and is rotatably connected to the lower mold core bottom plate at the bottom, a control arm is fixedly connected to the side of the expansion and contraction block, and the control arm extends from the side plate of the lower mold core bottom plate away from the front clamping mold, the lower mold core has four pieces and is located around the expansion and contraction block, a receiving groove is provided in the lower mold core, and springs are penetrated and fixed in the two adjacent lower mold core receiving grooves, and the rear clamping mold is located at the front part above the receiving bottom plate and is fixedly connected to the receiving bottom plate.

3. The automatic iron can punching machine capable of rapid die change according to claim 1, characterized in that: The mold base also includes a rolling needle. The top surface of the receiving bottom plate is provided with a rolling groove at a position corresponding to the position between the two clamping plates. The rolling needle is placed in the rolling groove. The rolling needle is rotatably connected to the receiving bottom plate.

4. The automatic iron can punching machine capable of rapid die change according to claim 1, characterized in that: The mold mounting frame includes a telescopic power member, a first fixed plate, a second fixed plate, a third fixed plate, a buffer connecting plate, a sliding rod and a threaded connecting rod. The second fixed plate is fixed to the frame, the first fixed plate is located behind the first fixed plate, the telescopic power member is fixed to the frame and the telescopic end is fixedly connected to the first fixed plate, one end of the sliding rod passes through the second fixed plate and is fixedly connected to the first fixed plate, the other end of the sliding rod is fixedly connected to the buffer connecting plate, the third fixed plate is detachably connected to the expansion and contraction mold core assembly, one end of the threaded connecting rod is connected to the third fixed plate and the other end is fixedly connected to the buffer connecting plate.

5. The automatic iron can punching machine capable of rapid die change according to claim 4, characterized in that: The mold mounting frame also includes a buffer rod, which is fixed on the buffer connecting plate and has a contact surface between the buffer end and the second fixing plate.

6. The automatic iron can punching machine capable of rapid die change according to claim 4, characterized in that: The telescopic power member is a cylinder, and a piston rod of the cylinder passes through the second fixing plate and is fixedly connected to the first fixing plate.

7. The automatic iron can punching machine capable of rapid die change according to claim 5, characterized in that: The buffer rod is composed of a hydraulic buffer.

8. The automatic iron can punching machine capable of rapid die change according to claim 4, characterized in that: The side surface of the threaded connecting rod is provided with threads, one end of the threaded connecting rod passes through the third fixing plate, and nuts are threadedly connected to the two side surfaces of the threaded connecting rod passing through the third fixing plate.

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