Multi-stage stamping system for iron core machining

Abstract

The invention relates to the technical field of iron core processing, in particular to a multistage stamping system for iron core processing, which comprises a rack, a hydraulic rod is arranged on the rack, extrusion assemblies are arranged on the rack and the hydraulic rod, and each extrusion assembly comprises a mounting shell, a fixed block fixedly mounted on the mounting shell and a movable block hinged to the fixed block. The movable block rotates relative to the fixed block so that the curvature of the blank extruded by the extrusion assembly can be adjusted. The two extrusion assemblies are matched to plastically deform a blank and discharge impurities, the strength of the blank is improved, the hydraulic rod continues to work to enable the two extrusion assemblies to extrude the blank for multiple times, the movable ring drives the blank to rotate, all corners of the side face of the blank are evenly extruded, and after the movable ring rotates by one circle, the blank is extruded. The movable block on the extrusion assembly rotates relative to the fixed block, so that the curvature of an extrusion face formed by the movable block and the fixed block is increased, and the extrusion assembly extrudes the blank into a shape tending to be a cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of iron core processing, and in particular to a multi-stage stamping system for iron core processing. Background Art

[0002] Stamping is a process that relies on a press and a die to extrude and shape the heated blank. Multiple stamping and forging can force the blank to expel impurities, thereby improving the strength of the blank and making the processed iron core have higher strength.

[0003] According to the publication (announcement) number CN118371584B, the publication (announcement) date is 2024-10-25, and a stamping forming equipment for transformer core processing is disclosed, including a base, a support frame is fixedly installed on the top of the base, a stamping device is fixedly installed on the top of the support frame, a forming device is fixedly installed in the middle of the support frame, and the forming device is arranged below the stamping device, a discharge conveyor belt is fixedly installed on the inner lower end of the support frame, a loading conveyor belt is fixedly installed on the front side of the base, a pushing device is fixedly installed in the middle of the rear side of the support frame, the output end of the pushing device passes through the support frame, and a waste discharge device is fixedly installed on the front of the support frame. By setting up stamping and forming devices, this device realizes efficient and automated production of transformer cores. The raw materials are fed into the forming mold through the feeding conveyor belt, and the limit plate ensures the accurate position. The hydraulic cylinder drives the stamping mold to press down, and cooperates with the forming mold to extrude the raw materials to quickly complete the forming. After forming, the second electric push rod pushes the push plate to move the finished product to the fixed frame, and then it is discharged through the waste conveyor belt. The whole process does not require too much manual operation, which improves production efficiency and convenience. At the same time, the coordinated work of the conveyor belt ensures the automation of the entire production process, greatly simplifies the operation, and improves the overall production efficiency.

[0004] In the prior art including the above-mentioned patent, during the multi-stage stamping and forging process of the iron core on the marine diesel engine, a rectangular blank is generally placed on a press, which performs stamping and forging and gradually turns it into a cylindrical shape. However, during the stamping and forging process, the worker needs to constantly turn the blank over so that all angles of the blank can be fully stamped and forged. However, the temperature of the heated iron core is very high, and the heat emitted by the iron core will make the worker very uncomfortable. At the same time, the iron core is also very heavy, and there are great safety hazards in the process of turning the iron core, endangering the life safety of the worker. Summary of the invention

[0005] The object of the present invention is to provide a multi-stage stamping system for iron core processing, aiming to solve the above-mentioned problems.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a multi-stage stamping system for iron core processing, including a frame, a hydraulic rod is arranged on the frame, and an extrusion assembly is arranged on the frame and the hydraulic rod, and the extrusion assembly includes a mounting shell, a fixed block fixedly mounted on the mounting shell, and a movable block hinged on the fixed block, and the movable block rotates relative to the fixed block so that the curvature of the blank extruded by the extrusion assembly is adjustable, a movable seat for supporting the blank is arranged on the frame, and a movable ring for fixing the blank is arranged on the movable seat, and the hydraulic rod drives the extrusion assembly on it to reciprocate to rotate the movable ring, and the movable ring rotates one circle to rotate the movable block in the extrusion assembly relative to the fixed block.

[0007] Preferably, a connecting tube is rotatably provided on the movable block, and a connecting rod threadably connected to the connecting tube is movably provided on the mounting block, and the connecting rod is rotated to make the movable block rotate relative to the movable block.

[0008] Preferably, a gear rod for driving the movable ring to rotate is rotatably provided on the frame, and the extrusion assembly on the hydraulic rod reciprocates to rotate the gear rod by a predetermined angle.

[0009] Preferably, a movable plate for supporting the movable ring is slidably provided on the movable seat, and the movable plate moves to make the height of the blank adjustable.

[0010] Preferably, the movable seat is provided with a transmission wheel which is meshed with the gear rod and maintained in a coupled state with the movable ring, and the transmission wheel drives the movable ring to rotate in one direction.

[0011] Preferably, a first rack is slidably provided in the mounting shell for driving the connecting rod to rotate, a movable rod which is rotatably provided on the first rack and cooperates with the thread of the mounting shell is provided, and the movable ring rotates one circle to rotate the movable rod by a predetermined angle.

[0012] Preferably, a driving ring for driving the movable rod to rotate is slidably provided in the mounting shell, the driving ring is provided with a tenon block extending into the connecting rod, and the connecting rod is provided with a second guide groove adapted to the tenon block.

[0013] Preferably, the second guide groove includes a plurality of parallel distributed inclined portions and a vertical portion connecting two adjacent inclined portions, the tenon block moves along the inclined portion to rotate the movable rod, and the tenon block moves to the end of the inclined portion and moves along the vertical portion to reset the drive ring.

[0014] Preferably, a blocking piece is hinged on the vertical portion for limiting the reverse movement of the tenon block along the second guide groove.

[0015] Preferably, a slide plate is slidably provided on the mounting shell, the extrusion assembly reciprocates to move the slide plate a predetermined distance, and the movable ring rotates one circle to enable the slide plate to drive the driving ring to move.

[0016] In the above technical scheme, a multi-stage stamping system for iron core processing provided by the present invention has the following beneficial effects: when performing stamping work, the two ends of the heated blank are placed in the movable rings on the two movable seats, and the movable bar is rotated, the movable bar is locked on the movable ring, the blank is locked on the movable seat, and the bottom of the blank is against the fixed block of the extrusion assembly on the frame, at this time, the hydraulic rod is extended to drive the extrusion assembly on it to move downward, the fixed block and the movable block on the extrusion assembly extrude the blank, and the other extrusion assembly supports the blank, and the two extrusion assemblies cooperate to make the blank plastically deformed and discharge impurities, thereby improving the strength of the blank, and then the hydraulic rod drives the extrusion assembly on it to move upward, at this time the movable ring drives the blank to rotate, and then the hydraulic rod continues to work so that the two extrusion assemblies extrude the blank multiple times, and the movable ring drives the blank to rotate, so that each corner of the side of the blank is evenly extruded, and after the movable ring rotates one circle, the movable block on the extrusion assembly rotates relative to the fixed block, so that the curvature of the extrusion surface composed of the movable block and the fixed block increases, so that the extrusion assembly extrude the blank into a shape tending to be cylindrical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the internal structure of a movable seat provided in an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of the structure of an extrusion assembly provided in an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the internal structure of a mounting shell provided by an embodiment of the present invention;

[0022] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0023] Figure 6 A schematic diagram of the structure of a drive ring provided in an embodiment of the present invention;

[0024] Figure 7A schematic diagram of the structure of a slide plate provided by an embodiment of the present invention;

[0025] Figure 8 A schematic diagram of the side wall expansion structure of the movable rod provided in an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1. Frame; 11. Extrusion assembly; 111. Fixed block; 112. Movable block; 113. Connecting cylinder; 114. Connecting rod; 115. First gear; 116. Universal joint; 117. First rack; 118. Movable rod; 119. Movable sheet; 12. Slide plate; 121. First guide groove; 122. Longitudinal part; 123. Transverse part; 124. Connecting part; 125. Sliding block; 126. Driving ring; 127. Cable; 128. Ejector rod; 1 29. Insertion slot; 13. Movable seat; 131. Movable plate; 132. Movable ring; 133. Movable bar; 134. Second gear; 135. Transmission wheel; 136. Tensioning rod; 137. Tooth rod; 138. Second rack; 141. Second guide slot; 142. Horizontal portion; 143. Vertical portion; 144. Inclined portion; 145. Mounting strip; 146. Tenon rod; 147. Block; 148. Tenon block; 2. Hydraulic rod; 21. Mounting shell. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] like Figure 1-8 As shown, a multi-stage stamping system for iron core processing includes a frame 1, a hydraulic rod 2 is arranged on the frame 1, an extrusion assembly 11 is arranged on both the frame 1 and the hydraulic rod 2, the extrusion assembly 11 includes a mounting shell 21, a fixed block 111 fixedly mounted on the mounting shell 21, and a movable block 112 hinged on the fixed block 111, the movable block 112 rotates relative to the fixed block 111 so that the curvature of the billet extruded by the extrusion assembly 11 is adjustable, a movable seat 13 for supporting the billet is arranged on the frame 1, a movable ring 132 for fixing the billet is arranged on the movable seat 13, the hydraulic rod 2 drives the extrusion assembly 11 thereon to reciprocate so that the movable ring 132 rotates, and the movable ring 132 rotates one circle so that the movable block 112 in the extrusion assembly 11 rotates relative to the fixed block 111.

[0030] Specifically, a movable bar 133 is hinged on the movable ring 132, and a lock (a conventional lock, which is the prior art and will not be described in detail) for locking the movable bar 133 is provided on the movable ring 132. The fixed block 111 and the movable block 112 on the extrusion assembly 11 both extend to the outside of the mounting shell 21.

[0031] In the above technical solution, when the stamping work is performed, the two ends of the heated blank are placed in the movable rings 132 on the two movable seats 13, and the movable bar 133 is rotated, and the movable bar 133 is locked on the movable ring 132, so that the blank is locked on the movable seat 13, and the bottom of the blank is against the extrusion surface composed of the fixed block 111 and the movable block 112 of the extrusion assembly 11 on the frame 1. At this time, the hydraulic rod 2 is extended to drive the extrusion assembly 11 thereon to move downward, and the extrusion surface composed of the fixed block 111 and the movable block 112 on the extrusion assembly 11 extrude the blank, and the other extrusion assembly 11 supports the blank, and the two extrusion assemblies 11 cooperates to make the billet plastically deform and expel impurities, thereby improving the strength of the billet. Then the hydraulic rod 2 drives the extrusion assembly 11 thereon to move upward. At this time, the movable ring 132 drives the billet to rotate. Then the hydraulic rod 2 continues to work so that the two extrusion assemblies 11 extrude the billet multiple times. The movable ring 132 drives the billet to rotate, so that all corners of the side of the billet are evenly extruded. After the movable ring 132 rotates one circle, the movable block 112 on the extrusion assembly 11 rotates relative to the fixed block 111, so that the curvature of the extrusion surface composed of the movable block 112 and the fixed block 111 increases, so that the extrusion assembly 11 extrude the billet into a shape tending to be cylindrical.

[0032] As a further embodiment of the present invention, a connecting tube 113 is rotatably provided on the movable block 112, and a connecting rod 114 threadedly connected to the connecting tube 113 is movably provided on the mounting block. The connecting rod 114 rotates to allow the movable block 112 to rotate relative to the movable block 112.

[0033] Specifically, the connecting rod 114 rotates to move along the internal thread of the connecting cylinder 113, and the connecting rod 114 pushes the connecting cylinder 113 to move, thereby pushing the movable block 112 to rotate relative to the fixed block 111, so that the curvature of the extrusion surface formed by the movable block 112 and the fixed block 111 changes, so that the extrusion assembly 11 extrude the blank into a shape tending to be cylindrical.

[0034] As another embodiment further provided by the present invention, a gear rod 137 for driving the movable ring 132 to rotate is rotatably provided on the frame 1, and the extrusion assembly 11 on the hydraulic rod 2 reciprocates to rotate the gear rod 137 to a predetermined angle.

[0035] Specifically, a second rack 138 meshing with the rack rod 137 is provided on the mounting shell 21 on the hydraulic rod 2 .

[0036] Furthermore, when the hydraulic rod 2 drives the extrusion assembly 11 thereon to move back and forth, the second rack 138 pushes the gear rod 137 meshing therewith to rotate, and the gear rod 137 drives the movable ring 132 to rotate, so that all angles of the blank on the movable ring 132 are evenly extruded.

[0037] As another embodiment further provided by the present invention, a movable plate 131 for supporting the movable ring 132 is slidably provided on the movable seat 13, and the movable plate 131 moves to make the height of the blank adjustable.

[0038] Specifically, a guide rod extending into the movable seat 13 is disposed on the movable plate 131 , and a spring is disposed between the guide rod and the movable seat 13 .

[0039] Furthermore, when the two extrusion assemblies 11 stamp and forge the billet, the middle part of the billet becomes thinner and the billet is elongated, and the movable seat 13 moves on the frame 1 with the movable plate 131, and the movable plate 131 moves downward relative to the movable seat 13, so that the middle part of the billet is always against the fixed block 111 and the movable block 112 of the extrusion assembly 11 on the frame 1, and the fixed block 111 and the movable block 112 extend to the outside of the mounting shell 21, which can lift the billet to prevent the billet from being scratched against the frame 1.

[0040] As another embodiment further provided by the present invention, a transmission wheel 135 is disposed on the movable seat 13 , which is meshed with the gear rod 137 and keeps a coupling state with the movable ring 132 , and the transmission wheel 135 drives the movable ring 132 to rotate in one direction.

[0041] Specifically, the outer side of the movable ring 132 is a gear ring, and a second gear 134 meshing with the gear ring is arranged in the movable plate 131, a sprocket is arranged on the second gear 134, and a one-way force transmission mechanism (such as a ratchet and pawl mechanism, which is a prior art and will not be described in detail) is arranged between the sprocket and the second gear 134, a tensioning rod 136 is slidably arranged in the movable plate 131, a spring is arranged between the tensioning rod 136 and the movable plate 131, a chain coupled with the transmission wheel 135 is arranged on the movable seat 13, the chain surrounds the tensioning rod 136, the transmission wheel 135 and the sprocket, and a rotation damping is arranged between the second gear 134 and the movable plate 131.

[0042] Furthermore, when the hydraulic rod 2 drives the second rack 138 thereon to move downward, the second rack 138 drives the toothed rod 137 to rotate, and the toothed rod 137 drives the transmission wheel 135 meshing therewith to rotate, and the transmission wheel 135 drives the sprocket to rotate through the chain. At this time, the sprocket cannot transmit power to the second gear 134; when the hydraulic rod 2 drives the second rack 138 thereon to move upward, the second rack 138 drives the toothed rod 137 to rotate in the opposite direction, and the toothed rod 137 drives the transmission wheel 135 meshing therewith to rotate, and the transmission wheel 135 drives the sprocket to rotate through the chain. At this time, the sprocket drives the second gear 134 to rotate through the one-way force transmission mechanism, and the second gear 134 drives the movable ring 132 and the blank to rotate, so that the extrusion assembly 11 extrude another angle of the blank.

[0043] As another embodiment further provided by the present invention, a first rack 117 for driving the connecting rod 114 to rotate is slidably provided in the mounting shell 21, and a movable rod 118 is rotatably provided on the first rack 117 and is threadably matched with the mounting shell 21. The movable ring 132 rotates one circle to rotate the movable rod 118 by a predetermined angle.

[0044] Specifically, a first gear 115 meshing with the first rack 117 is rotatably disposed in the mounting shell 21 , a shaft is disposed on the first gear 115 , and a universal joint 116 is disposed between the shaft and the connecting rod 114 .

[0045] Furthermore, during the rotation of the movable rod 118, the movable rod 118 moves along the screw hole on the mounting shell 21 and drives the first rack 117 to move. The first rack 117 drives the shaft rod to rotate through the first gear 115 meshing therewith. The shaft rod drives the connecting rod 114 to rotate through the universal joint 116. The connecting rod 114 moves along the internal thread of the connecting tube 113, thereby pushing the movable block 112 to rotate relative to the fixed block 111, and the curvature of the extrusion surface formed by the movable block 112 and the fixed block 111 changes.

[0046] As another embodiment further provided by the present invention, a driving ring 126 for driving the connecting rod 114 to rotate is slidably provided in the mounting shell 21, and a tenon block 148 extending into the connecting rod 114 is provided on the driving ring 126, and a second guide groove 141 adapted to the tenon block 148 is provided on the movable rod 118.

[0047] Specifically, the drive ring 126 is axially slidably installed in the installation shell 21.

[0048] Furthermore, during the sliding process of the driving ring 126, the tenon 148 on the driving ring 126 moves along the second guide groove 141 on the movable rod 118, thereby pushing the movable rod 118 to rotate, and the movable rod 118 moves along the screw hole on the mounting shell 21 and drives the first rack 117 to move, and the first rack 117 drives the shaft rod to rotate through the first gear 115 meshing therewith, and the shaft rod drives the connecting rod 114 to rotate through the universal joint 116, and the connecting rod 114 moves along the internal thread of the connecting tube 113, thereby pushing the movable block 112 to rotate relative to the fixed block 111, and the curvature of the extrusion surface formed by the movable block 112 and the fixed block 111 changes.

[0049] As another embodiment further provided by the present invention, the second guide groove 141 includes a plurality of parallel distributed inclined portions 144 and a vertical portion 143 connecting two adjacent inclined portions 144, the tenon block 148 moves along the inclined portion 144 to rotate the movable rod 118, and the tenon block 148 moves to the end of the inclined portion 144 and moves along the vertical portion 143 to reset the drive ring 126.

[0050] Specifically, Figure 8 Accordingly, the second guide groove 141 further includes a horizontal portion 142 communicating with the uppermost inclined portion 144 and an inclined groove connecting the horizontal portion 142 and the lowermost vertical portion 143 .

[0051] Furthermore, when the drive ring 126 moves toward the direction close to the first gear 115 (the drive ring 126 does not rotate during the movement), the tenon 148 on the drive ring 126 moves along the inclined portion 144 of the second guide groove 141, pushing the movable rod 118 to rotate, and the movable rod 118 moves along the screw hole on the mounting shell 21 and drives the first rack 117 to move. The first rack 117 drives the shaft rod to rotate through the first gear 115 meshing therewith, and the shaft rod drives the connecting rod 114 to rotate through the universal joint 116. The connecting rod 114 moves along the internal thread of the connecting tube 113, thereby pushing the movable block 112 to rotate relative to the fixed block 111. The curvature of the extrusion surface formed by the movable block 112 and the fixed block 111 changes, and then the drive ring 126 moves in the opposite direction, and the tenon 148 on the drive ring 126 moves along the vertical portion 143. When the tenon 148 moves to the end of the vertical portion 143, the drive ring 126 returns to its initial position.

[0052] As another embodiment further provided by the present invention, a blocking piece 147 is hinged on the vertical portion 143 for limiting the reverse movement of the tenon block 148 along the second guide groove 141 .

[0053] Specifically, a torsion spring is provided between the blocking piece 147 and the movable rod 118 , and a spring is provided between the movable rod 118 and the mounting shell 21 .

[0054] Furthermore, when the driving ring 126 moves in the direction close to the first gear 115 (the driving ring 126 does not rotate during the movement), the tenon block 148 on the driving ring 126 moves along the inclined portion 144 of the second guide groove 141, pushing the movable rod 118 to rotate, and the movable rod 118 moves along the screw hole on the mounting shell 21 and drives the first rack 117 to move, and the first rack 117 drives the shaft rod to rotate through the first gear 115 meshing therewith, and the shaft rod drives the connecting rod 114 to rotate through the universal joint 116, and the connecting rod 114 moves along the internal thread of the connecting tube 113, thereby pushing the movable block 112 to rotate relative to the fixed block 111, and the curvature of the extrusion surface formed by the movable block 112 and the fixed block 111 changes, and then the driving ring 126 moves in the opposite direction, and the tenon block 148 on the driving ring 126 moves along the vertical portion 143, and the tenon block 148 pushes the blocking piece 147 to rotate, and when the tenon block 148 moves to the end of the vertical portion 143, the driving ring 126 moves in the opposite direction. The movable ring 126 returns to its initial position, and the tenon 148 separates from the baffle 147. The baffle 147 seals the vertical portion 143 under the action of the torsion spring to prevent the tenon 148 from moving in the opposite direction. When the driving ring 126 reciprocates next time, the tenon 148 continues to move along the next inclined portion 144 and the vertical portion 143 until the tenon 148 moves to the last vertical portion 143. At this time, the movable rod 118 cannot continue to rotate, and the forging work of the blank is also completed. At this time, the blank is removed and the movable rod 118 is manually rotated in the opposite direction. The tenon 148 moves along the inclined portion 144 connecting the horizontal portion 142 and the last vertical portion 143 and enters the horizontal portion 142. The thread of the movable rod 118 separates from the thread in the through hole of the mounting shell 21. The movable rod 118 continues to rotate and returns to its initial position. The movable rod 118 moves toward the outside of the mounting shell 21 under the action of the spring, and the tenon 148 is embedded in the end of the first inclined portion 144 on the movable rod 118.

[0055] Furthermore, the movable rod 118 in the above embodiment extends to the outside of the mounting shell 21 and is provided with a knob, and a space is reserved on the frame 1 for the staff to rotate the knob on the extrusion assembly 11 thereon.

[0056] As another embodiment further provided by the present invention, a slide plate 12 is slidably disposed on the mounting shell 21, the extrusion assembly 11 reciprocates to move the slide plate 12 a predetermined distance, and the movable ring 132 rotates one circle to enable the slide plate 12 to drive the driving ring 126 to move.

[0057] Specifically, a slider 125 is slidably provided on the mounting shell 21, a spring is provided between the slider 125 and the mounting shell 21, a cable 127 is provided between the slider 125 and the driving ring 126, a spring is provided between the slide plate 12 and the mounting shell 21, a first guide groove 121 is provided on the slide plate 12, the first guide groove 121 includes a plurality of parallel longitudinal portions 122, an inclined connecting portion 124 is provided between two adjacent longitudinal portions 122, a movable sheet 119 is provided at the connection between the connecting portion 124 and the longitudinal portion 122, a torsion spring is provided between the movable sheet 119 and the slide plate 12, a transverse portion 123 is provided on the slide plate 12, the transverse portion 123 is connected to the two longitudinal portions 122 at the most edges, and there is a portion on the transverse portion 123 that exceeds the longitudinal portion 122, and a movable sheet 119 (such as Figure 7 As shown), a mounting strip 145 is provided on the mounting shell 21, a tenon rod 146 adapted to the first guide groove 121 is slidably provided on the mounting strip 145, a spring is provided between the tenon rod 146 and the mounting strip 145, an insertion groove 129 corresponding to the longitudinal portion 122 is provided on the side of the slide plate 12 opposite to the first guide groove 121, a slope is provided on the side wall of the insertion groove 129, and the two mounting shells 21 are both provided with slide plates 12 and a push rod 128 adapted to the insertion groove 129, and the push rod 128 is specifically a self-elastic telescopic rod.

[0058] Furthermore, in the process of the two extrusion assemblies 11 approaching each other, the top rod 128 on one of the mounting shells 21 is inserted into the insertion groove 129 on the slide plate 12 on the other mounting shell 21, and moves along the slope in the insertion groove 129, pushing the slide plate 12 to move relative to the mounting shell 21, and the spring between the mounting shell 21 and the slide plate 12 accumulates elastic potential energy, and the tenon rod 146 moves along the inclined connecting portion 124. When the end of the insertion rod is completely inserted into the insertion groove 129, the slide plate 12 stops moving, and the tenon rod 146 pushes the movable sheet 119 to rotate and enter the next longitudinal portion 122, and the tenon rod 146 and the mounting strip 145 are connected. The spring of the movable sheet 119 is separated from the tenon rod 146 and the connecting portion 124 is sealed under the action of the torsion spring. After the tenon rod 146 completely enters the longitudinal portion 122, the spring between the tenon rod 146 and the mounting strip 145 releases the elastic potential energy, pushing the tenon rod 146 to move to the connection between the longitudinal portion 122 and the next connecting portion 124, and fixing the slide plate 12. Then the two extrusion assemblies 11 are separated, and the push rod 128 is separated from the insertion groove 129; the extrusion assembly 11 repeatedly moves back and forth, so that the slide plate 12 moves continuously, and the tenon rod 146 moves along the first guide groove 121 and gradually moves to the edge. In the longitudinal portion 122, the tenon rod 146 enters the transverse portion 123 under the action of the spring between the tenon rod 146 and the mounting strip 145, and the tenon rod 146 no longer hinders the movement of the slide plate 12. At this time, the slide plate 12 is hindered by the push rod 128 inserted into the slot 129. When the two extrusion assemblies 11 move away and the push rod 128 is pulled out of the insertion slot 129, the spring between the slide plate 12 and the mounting shell 21 releases elastic potential energy to push the slide plate 12 to move. The slide plate 12 moves quickly and hits the slider 125 under the action of inertial force. The slider 125 squeezes the spring between it and the mounting shell 21 and relaxes the cable 127. The drive ring 126 is in the spring. The movable sheet 119 is separated from the movable sheet 119, and the movable sheet 119 seals the transverse portion 123 under the action of the torsion spring. Then the spring between the slide plate 12 and the mounting shell 21 pulls the slide plate 12 back to the initial position, and the slider 125 moves under the action of the spring. The slider 125 pulls the drive ring 126 to reset through the cable 127, and the tenon rod 146 moves to the position where the transverse portion 123 is connected to the connecting portion 124, so that it can enter the next longitudinal portion 122 along the connecting portion 124 under the guidance of the movable sheet 119.

[0059] Furthermore, the number of reciprocating movements of the extrusion assembly 11 experienced by the movable ring 132 when it rotates one circle is one more than the number of longitudinal portions 122 of the first guide groove 121 on the slide 12. When the movable ring 132 rotates one circle, the tenon rod 146 just moves from the connection between the transverse portion 123 and the connecting portion 124 to the longitudinal portion 122 connected to the transverse portion 123, and then every time the movable ring 132 rotates one circle, the slide 12 drives the driving ring 126 to reciprocate once.

[0060] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multi-stage stamping system for iron core processing, characterized in that: The invention comprises a frame (1), wherein a hydraulic rod (2) is arranged on the frame (1), and an extrusion assembly (11) is arranged on both the frame (1) and the hydraulic rod (2), wherein the extrusion assembly (11) comprises a mounting shell (21), a fixed block (111) fixedly mounted on the mounting shell (21), and a movable block (112) hinged on the fixed block (111), wherein the movable block (112) rotates relative to the fixed block (111) so that the curvature of the billet extruded by the extrusion assembly (11) is adjustable, wherein a movable seat (13) for supporting the billet is arranged on the frame (1), and a movable ring (132) for fixing the billet is arranged on the movable seat (13), wherein the hydraulic rod (2) drives the extrusion assembly (11) thereon to reciprocate so that the movable ring (132) rotates, and the movable ring (132) rotates one circle so that the movable block (112) in the extrusion assembly (11) rotates relative to the fixed block (111).

2. A multi-stage stamping system for iron core processing according to claim 1, characterized in that: A connecting tube (113) is rotatably provided on the movable block (112), and a connecting rod (114) threadedly connected to the connecting tube (113) is movably provided on the mounting block. The connecting rod (114) rotates to allow the movable block (112) to rotate relative to the movable block (112).

3. The multi-stage stamping system for iron core processing according to claim 1, characterized in that: A gear rod (137) is rotatably provided on the frame (1) for driving the movable ring (132) to rotate, and the extrusion assembly (11) on the hydraulic rod (2) reciprocates to rotate the gear rod (137) to a predetermined angle.

4. A multi-stage stamping system for iron core processing according to claim 3, characterized in that: A movable plate (131) for supporting the movable ring (132) is slidably arranged on the movable seat (13), and the movable plate (131) moves so that the height of the blank can be adjusted.

5. The multi-stage stamping system for iron core processing according to claim 3, characterized in that: The movable seat (13) is provided with a transmission wheel (135) which meshes with the gear rod (137) and maintains a coupling state with the movable ring (132), and the transmission wheel (135) drives the movable ring (132) to rotate in one direction.

6. The multi-stage stamping system for iron core processing according to claim 2, characterized in that: A first rack (117) is slidably disposed in the mounting shell (21) for driving the connecting rod (114) to rotate; a movable rod (118) is rotatably disposed on the first rack (117) and is threadably engaged with the mounting shell (21); the movable ring (132) rotates one circle to rotate the movable rod (118) by a predetermined angle.

7. A multi-stage stamping system for iron core processing according to claim 6, characterized in that: A driving ring (126) for driving the movable rod (118) to rotate is slidably disposed in the mounting shell (21); a tenon block (148) extending into the connecting rod (114) is disposed on the driving ring (126); and a second guide groove (141) adapted to the tenon block (148) is provided on the movable rod (118).

8. The multi-stage stamping system for iron core processing according to claim 7, characterized in that: The second guide groove (141) includes a plurality of parallel distributed inclined portions (144) and a vertical portion (143) connecting two adjacent inclined portions (144); the tenon block (148) moves along the inclined portion (144) to rotate the movable rod (118); the tenon block (148) moves to the end of the inclined portion (144) and moves along the vertical portion (143) to reset the drive ring (126).

9. A multi-stage stamping system for iron core processing according to claim 8, characterized in that: A blocking piece (147) is hinged on the vertical portion (143) and is used to limit the reverse movement of the tenon block (148) along the second guide groove (141).

10. The multi-stage stamping system for iron core processing according to claim 7, characterized in that: A slide plate (12) is slidably disposed on the mounting shell (21), the extrusion assembly (11) reciprocates to move the slide plate (12) a predetermined distance, and the movable ring (132) rotates one circle to enable the slide plate (12) to drive the driving ring (126) to move.

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