Special-shaped hard alloy part machining and stamping device

Abstract

The invention relates to the technical field of stamping machining, in particular to a special-shaped hard alloy part machining stamping device which comprises a workbench, a U-shaped vertical plate, a pushing mechanism, a secondary lifting stamping mechanism and a feeding and discharging matching mechanism. According to the special-shaped hard alloy part machining stamping device, the material pushing mechanism, the second-stage lifting stamping mechanism and the feeding and discharging matching mechanism are matched, after the inner wall of a rectangular groove in the left side of a circular stand column is adopted for material blocking and limiting, it is ensured that a to-be-stamped part accurately enters a stamping cavity, and a U-shaped pressing plate can be driven to sequentially conduct second-stage lifting; during the period, a circular stand column can be controlled to move rightwards to punch a material plate, the circular stand column is controlled to rotate by 180 degrees to conduct rotating transposition, a stamped part obtained after stamping is completed is rapidly put into a second rectangular mounting groove to be rapidly transferred, and therefore automatic feeding and discharging work is completed, and the feeding and discharging time is matched with the machining time; damage or deformation of the material plate caused by improper manual operation is avoided, and the stamping efficiency and the machining quality are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping processing, and particularly relates to a stamping device for processing special-shaped cemented carbide parts. Background Art

[0002] Cemented carbide is a composite material mainly composed of metal carbides, with high hardness, high wear resistance and excellent corrosion resistance. This material is commonly used in the manufacture of cutting tools, grinding tools and various mechanical parts, and is widely applied in fields such as aerospace, automotive, machinery manufacturing and mining. Traditional processing of cemented carbide parts mainly relies on methods such as grinding and electrical machining. Although these technologies can meet the high-precision processing requirements, due to high processing costs and low efficiency, the application of cemented carbide parts is restricted. With the progress of manufacturing technology, stamping processing, as an efficient forming process, has gradually attracted attention.

[0003] When the existing stamping equipment stamps special-shaped cemented carbide, the loading and unloading process mainly relies on manual labor. Workers need to spend a lot of time on handling and clamping, which easily leads to a reduction in production efficiency. In addition, due to the mismatch between the loading and unloading time and the processing time, it may cause the idleness of the processing equipment, and during the loading and unloading process, the workpiece is easily damaged or deformed, thus affecting the subsequent processing quality and production efficiency. Summary of the Invention

[0004] Technical problems to be solved: A stamping device for processing special-shaped cemented carbide parts provided by the present invention can solve the problems of low stamping efficiency caused by the high degree of dependence on manual labor during loading and unloading when the existing stamping equipment stamps special-shaped cemented carbide, and workpiece damage or deformation caused during the loading and unloading process.

[0005] Technical solution: To achieve the above object, the present invention adopts the following technical solution. A stamping device for processing special-shaped cemented carbide parts includes a workbench. At the front and rear of the upper end of the workbench, U-shaped vertical plates are symmetrically installed. On the left side of the workbench and the front and rear two U-shaped vertical plates, a material pushing mechanism is jointly arranged. In the middle of the workbench and the front and rear two U-shaped vertical plates, a secondary lifting and stamping mechanism is jointly arranged. On the right side of the workbench and the front and rear two U-shaped vertical plates, a loading and unloading cooperation mechanism is jointly arranged.

[0006] The secondary lifting and stamping mechanism includes a first accommodating groove opened in the middle of the upper end of the workbench. A U-shaped pressing plate is slidably installed on the two front and rear U-shaped vertical plates. The right lower ends of the two shorter segments of the U-shaped pressing plate are wedge-shaped structures. A secondary lifting part is jointly arranged on the workbench and the U-shaped pressing plate. A stamping part is arranged on the U-shaped pressing plate corresponding to the position of the first accommodating groove. The material pushing mechanism includes a plurality of first avoiding grooves uniformly distributed from front to back opened on the left side of the upper end of the workbench. A rectangular installation groove one is jointly opened on the inner walls of the bottoms of the plurality of first avoiding grooves. The plurality of first avoiding grooves and the rectangular installation groove one are both communicated with the first accommodating groove. A material pushing part is jointly arranged on the plurality of first avoiding grooves and the rectangular installation groove one. A material pressing part is jointly arranged on the material pushing part and the two front and rear U-shaped vertical plates. The loading and unloading cooperation mechanism includes a circular column arranged on the upper end of the workbench. The lower end of the circular column is movably attached to the workbench. A second avoiding groove communicated with the first accommodating groove is opened on the right side of the upper end of the workbench. A loading and unloading cooperation part is jointly arranged on the circular column and the two front and rear U-shaped vertical plates. A material discharging part is jointly arranged on the circular column and the second avoiding groove.

[0007] Preferably, the loading and unloading cooperation part includes a rectangular sliding plate slidably installed between the two front and rear U-shaped vertical plates. The rectangular sliding plate is rotatably connected to the upper end of the circular column. The front and rear sides of the right end of the rectangular sliding plate are both connected to the corresponding U-shaped vertical plates through compression springs. And support vertical plates are symmetrically installed at the front and rear of the lower end of the rectangular sliding plate. Spring telescopic rods one are installed on the shorter segments on the right sides of the two front and rear U-shaped vertical plates through mounting seats. The telescopic ends of the spring telescopic rods one are fixedly connected to the corresponding support vertical plates. The left upper end of the rectangular sliding plate is a wedge-shaped structure corresponding to the two shorter segments of the U-shaped pressing plate.

[0008] Preferably, the loading and unloading cooperation part further includes rectangular grooves symmetrically opened at the left and right of the lower end of the circular column. A cooperation sliding groove is opened on the outer wall of the circular column. The cooperation sliding groove is composed of two front and rear vertical guiding sliding grooves and two left and right spiral guiding sliding grooves. The two front and rear vertical guiding sliding grooves are arranged in a staggered manner up and down. An L-shaped support frame is installed on the front side of the lower end of the U-shaped pressing plate. The L-shaped support frame is slidably connected to the corresponding U-shaped vertical plate. And a kidney-shaped through hole one is opened on the horizontal section of the L-shaped support frame corresponding to the position of the cooperation sliding groove. A kidney-shaped through hole two is opened on the front support vertical plate corresponding to the position of the cooperation sliding groove. A semi-circular head sliding rod is slidably installed on the kidney-shaped through hole one and the kidney-shaped through hole two. The end of the semi-circular head sliding rod away from the L-shaped support frame is slidably connected to the cooperation sliding groove.

[0009] Preferably, the material discharging part includes a second rectangular installation groove opened on the inner wall of the right end of the left rectangular groove. Rectangular installation grooves three are opened on the front and rear inner walls of the second rectangular installation groove. A trapezoidal push plate is slidably connected in the second rectangular installation groove through a plurality of tension springs. Trapezoidal clamping plates are slidably connected in the two front and rear rectangular installation grooves three through compression springs. A U-shaped material blocking plate is jointly installed on the front and rear inner walls of the second avoiding groove. The lower end of the circular column is movably attached to the U-shaped material blocking plate.

[0010] Preferably, the material discharging part further includes a first rack installed on the rear side of the inner wall at the bottom of the second avoidance groove, a material receiving inclined plate installed on the right side of the inner wall at the bottom of the second avoidance groove, the left end of the material receiving inclined plate is fixedly connected to the U-shaped material retaining plate, a first lead screw is rotatably installed on the upper inner wall of the second rectangular installation groove, the first lead screw is threadedly connected to a trapezoidal pushing plate slidably connected in the second rectangular installation groove, and a transmission gear is installed at the lower end of the first lead screw, and the transmission gear meshes with the first rack.

[0011] Preferably, the secondary lifting part includes installation barrels rotatably installed symmetrically before and after on the upper end of the workbench, an annular support rod is threadedly connected to the inner wall of the installation barrel, a second lead screw is threadedly connected to the inner wall of the annular support rod, annular sliding plates are fixedly sleeved on the lower ends of the annular support rod and the second lead screw respectively, the outer walls of the two annular sliding plates are respectively slidably connected to the inner walls of the installation barrel and the annular support rod, the upper ends of the front and rear second lead screws are fixedly connected to the U-shaped pressing plate, transmission shafts rotatably penetrating through the workbench are installed at the lower ends of the front and rear installation barrels respectively, the lower ends of the front and rear transmission shafts are connected by a transmission belt, a servo motor is installed on the lower end of the workbench through a motor base, and the output shaft of the servo motor is fixedly connected to any one of the transmission shafts.

[0012] Preferably, the material pushing part includes a second rack slidably installed on the right side in the middle avoidance groove one, a first material pushing plate slidably connected to the workbench is installed at the upper end of the second rack, support sliding plates are slidably installed on the left sides in the front and rear avoidance grooves one respectively, the front and rear support sliding plates are both slidably connected in the first rectangular installation groove, and accommodation grooves two are formed at the upper ends of the front and rear support sliding plates respectively, a second material pushing plate is connected in the accommodation groove two through a plurality of spring telescopic rods, and the right lower end of the second material pushing plate is of a wedge-shaped structure.

[0013] Preferably, the material pushing part further includes third racks installed on the lower sides of the opposite ends of the front and rear support sliding plates respectively, waist-shaped avoidance sliding holes are formed in the middle of the front and rear support sliding plates respectively, a rotating shaft is rotatably installed through the workbench, the rotating shaft is simultaneously slidably connected in the front and rear waist-shaped avoidance sliding holes, a forward and reverse motor is installed on the front end of the workbench through a motor base, the output shaft of the forward and reverse motor is fixedly connected to the rotating shaft, and a gear column is fixedly sleeved on the rotating shaft at the position between the front and rear support sliding plates, and the second rack and the front and rear third racks are all meshed with the gear column.

[0014] Preferably, the blank pressing part includes support seats installed at the opposite ends of the front and rear U-shaped vertical plates. The opposite ends of the front and rear support seats are jointly installed with a U-shaped storage bin. There is a feed inlet left at the left end of the U-shaped storage bin, and the lower end surface of the U-shaped storage bin is slidably attached to the first push plate. A rectangular avoidance chute is jointly opened at the upper ends of the U-shaped storage bin, the front and rear support seats, and the front and rear U-shaped vertical plates. An installation plate is slidably installed on the upper side inside the U-shaped storage bin. Two spring telescopic rods II are installed at the lower end of the installation plate, and a support sliding rod is installed through the middle of the installation plate. The support sliding rod is slidably connected to the rectangular avoidance chute. Connecting shafts are rotatably installed at the opposite ends of the front and rear U-shaped vertical plates. The front and rear connecting shafts are both connected to the rotating shaft through a transmission belt, and turntables are installed on the front and rear connecting shafts. Convex cylinders are installed at the opposite ends of the front and rear turntables. A connecting rod is rotatably sleeved on the convex cylinder. The end of the connecting rod away from the turntable is rotatably sleeved on the support sliding rod.

[0015] Preferably, the stamping part includes two front and rear supporting seats installed in the first accommodating groove. A supporting sliding plate is slidably installed between the two front and rear supporting seats. The upper left end of the supporting sliding plate is a wedge-shaped structure. Two spring telescopic rods III are installed through the lower end of the workbench. The telescopic ends of the two spring telescopic rods III are fixedly connected to the supporting sliding plate. Two hydraulic push rods are installed through the U-shaped pressing plate. The telescopic ends of the two hydraulic push rods are fixedly connected to a stamping plate correspondingly.

[0016] Beneficial effects: 1. The loading and unloading cooperation mechanism adopted by the special-shaped cemented carbide part processing stamping device provided by the present invention uses the inner wall of the rectangular groove on the left side of the circular column for material blocking and positioning, and then pushes the material plate into the first accommodating groove through the pushing mechanism to ensure that the workpiece to be stamped accurately enters the stamping cavity, thereby completing the automatic loading work. The loading and unloading time matches the processing time, avoiding the problem that the equipment is idle during processing and affecting the overall production efficiency.

[0017] 2. The two-stage lifting stamping mechanism adopted by the special-shaped cemented carbide part processing stamping device provided by the present invention can drive the U-shaped pressing plate to perform two-stage lifting in sequence. During this period, it can control the circular column to move to the right and then stamp the material plate, and control the circular column to rotate 180 degrees for rotation and displacement, which is convenient for quickly putting the stamped workpiece into the second rectangular installation groove for rapid transfer later, thereby completing the automatic discharging work, avoiding damage or deformation of the material plate caused by improper manual operation, and effectively improving the stamping work efficiency and processing quality.

[0018] 3. After the pusher mechanism of the special-shaped cemented carbide part processing and stamping device provided by the present invention pushes the material plate into the second rectangular installation groove, the circular column is controlled to rotate 180 degrees again to return to its original position through the secondary lifting and stamping mechanism, and during the process of driving the circular column to move to the right by the loading and unloading cooperation mechanism, the trapezoidal push plate is controlled to push the stamped material plate to move to the right, so that it slowly exits the second rectangular installation groove to complete the discharging work, effectively improving the stamping work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the drawings and embodiments.

[0020] Figure 1 is the first three-dimensional structure schematic diagram of the present invention.

[0021] Figure 2 is the second three-dimensional structure schematic diagram of the present invention (removing the rear C-shaped vertical plate).

[0022] Figure 3 is the half-sectional three-dimensional structure schematic diagram of the present invention.

[0023] Figure 4 is the three-dimensional structure schematic diagram of the workbench and the C-shaped vertical plate of the present invention (removing the rear C-shaped vertical plate).

[0024] Figure 5 is the partial-sectional three-dimensional structure schematic diagram of the secondary lifting and stamping mechanism and the loading and unloading cooperation mechanism of the present invention.

[0025] Figure 6 is the present invention Figure 5 The enlarged view at X in.

[0026] Figure 7 is the partial-sectional three-dimensional structure schematic diagram of the support seat and the support sliding plate of the present invention.

[0027] Figure 8 is the partial-sectional three-dimensional structure schematic diagram of the pusher mechanism of the present invention.

[0028] Fig. 9 is the present invention Figure 8 The enlarged view at Y in.

[0029] Fig.10 is the partial-sectional three-dimensional structure schematic diagram of the pusher part of the present invention.

[0030] Fig.11 is the first partial-sectional three-dimensional structure schematic diagram of the loading and unloading cooperation mechanism of the present invention.

[0031] Fig.12 is the second partial-sectional three-dimensional structure schematic diagram of the loading and unloading cooperation mechanism of the present invention.

[0032] Fig.13 It is a schematic three-dimensional structure diagram of the third partial section at the loading and unloading cooperation mechanism in the present invention.

[0033] Fig.14 It is a diagram of the pushing material working state when the C-shaped pressing plate descends for the first time in the present invention.

[0034] Fig.15 It is a diagram of the stamping working state when the C-shaped pressing plate descends for the second time in the present invention.

[0035] Fig.16 It is a diagram of the material discharging working state when the C-shaped pressing plate ascends for the first time in the present invention.

[0036] In the figure: 1. Workbench; 2. C-shaped vertical plate; 3. Pushing material mechanism; 31. Avoidance groove one; 32. Rectangular installation groove one; 33. Pushing material part; 331. Rack two; 332. Pushing plate one; 333. Support sliding plate; 334. Accommodation groove two; 335. Pushing plate two; 336. Rack three; 337. Waist-shaped avoidance sliding hole; 338. Rotating shaft; 339. Forward and reverse motor; 340. Gear column; 34. Pressing material part; 341. Support seat; 342. Return-shaped storage bin; 343. Rectangular avoidance sliding groove; 344. Installation plate; 345. Spring telescopic rod two; 346. Support sliding rod; 347. Connecting shaft; 348. Turntable; 349. Convex cylinder; 350. Connecting rod; 4. Secondary lifting and stamping mechanism; 41. Accommodation groove one; 42. C-shaped pressing plate; 43. Secondary lifting part; 431. Installation barrel; 432. Ring-shaped support rod; 433. Lead screw two; 434. Ring-shaped sliding plate; 435. Transmission shaft; 436. Servo motor; 44. Stamping part; 441. Support seat; 442. Support sliding plate; 443. Spring telescopic rod three; 444. Hydraulic push rod; 445. Stamping plate; 5. Loading and unloading cooperation mechanism; 51. Circular column; 52. Avoidance groove two; 53. Loading and unloading cooperation part; 531. Rectangular sliding plate; 532. Support vertical plate; 533. Spring telescopic rod one; 534. Rectangular groove; 535. Matching sliding groove; 536. L-shaped support frame; 537. Waist-shaped through hole one; 538. Waist-shaped through hole two; 539. Semi-circular head sliding rod; 54. Material discharging part; 541. Rectangular installation groove two; 542. Rectangular installation groove three; 543. Trapezoidal push plate; 544. Trapezoidal clamping plate; 545. C-shaped material blocking plate; 546. Rack one; 547. Material receiving inclined plate; 548. Lead screw one; 549. Trapezoidal pushing plate; 550. Transmission gear. Detailed Embodiment

[0037] The following will describe the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention can be implemented in many different ways defined and covered by the claims.

[0038] Refer to Figure 1, A stamping device for processing special-shaped cemented carbide parts, including a workbench 1. On the upper end of the workbench 1, U-shaped vertical plates 2 are symmetrically installed front and back. On the left side of the workbench 1 and the two U-shaped vertical plates 2 on the front and back, a material pushing mechanism 3 is jointly arranged. In the middle of the workbench 1 and the two U-shaped vertical plates 2 on the front and back, a secondary lifting and stamping mechanism 4 is jointly arranged. On the right side of the workbench 1 and the two U-shaped vertical plates 2 on the front and back, a loading and unloading cooperation mechanism 5 is jointly arranged.

[0039] Refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 , The secondary lifting and stamping mechanism 4 includes a receiving groove 41 opened in the middle of the upper end of the workbench 1. A U-shaped pressing plate 42 is slidably installed on the two U-shaped vertical plates 2 on the front and back. The right lower ends of the two shorter segments of the U-shaped pressing plate 42 are wedge-shaped structures. A secondary lifting part 43 is jointly arranged on the workbench 1 and the U-shaped pressing plate 42. A stamping part 44 is arranged on the U-shaped pressing plate 42 corresponding to the position of the receiving groove 41. The secondary lifting part 43 includes mounting barrels 431 rotatably installed symmetrically on the front and back of the upper end of the workbench 1. An annular support rod 432 is threadedly connected to the inner wall of the mounting barrel 431. A lead screw 433 is threadedly connected to the inner wall of the annular support rod 432. Annular sliding plates 434 are fixedly sleeved on the lower ends of the annular support rod 432 and the lead screw 433. The outer walls of the two annular sliding plates 434 are respectively slidably connected to the inner walls of the mounting barrel 431 and the annular support rod 432. The upper ends of the two lead screws 433 on the front and back are fixedly connected to the U-shaped pressing plate 42. Transmission shafts 435 are installed at the lower ends of the two mounting barrels 431 on the front and back and penetrate through the workbench 1. The lower ends of the two transmission shafts 435 on the front and back are connected by a transmission belt. A servo motor 436 is installed on the lower end of the workbench 1 through a motor base. The output shaft of the servo motor 436 is fixedly connected to any one of the transmission shafts 435.

[0040] Refer to Figure 1 , Figure 4 , Fig. 9 and Fig.10, the pushing mechanism 3 includes a plurality of first avoidance grooves 31 evenly distributed from front to back and opened on the left side of the upper end of the workbench 1. A rectangular installation groove 32 is commonly opened on the inner walls of the bottoms of the plurality of first avoidance grooves 31. The plurality of first avoidance grooves 31 and the rectangular installation groove 32 are both communicated with the first accommodation groove 41. A pushing part 33 is commonly arranged on the plurality of first avoidance grooves 31 and the rectangular installation groove 32. A pressing part 34 is commonly arranged on the pushing part 33 and the front and rear U-shaped vertical plates 2. The pushing part 33 includes a second rack 331 slidably installed on the right side in the middle first avoidance groove 31. A first pushing plate 332 slidably connected to the workbench 1 is installed at the upper end of the second rack 331. Support sliding plates 333 are slidably installed on the left sides in the front and rear first avoidance grooves 31. The front and rear support sliding plates 333 are both slidably connected to the rectangular installation groove 32. And accommodation grooves 334 are opened at the upper ends of the front and rear support sliding plates 333. A second pushing plate 335 is connected to the accommodation groove 334 through a plurality of spring telescopic rods. The right lower end of the second pushing plate 335 is of a wedge-shaped structure.

[0041] Refer to Figure 3 , Figure 4 , Fig. 9 and Fig.10 , the pushing part 33 further includes third racks 336 installed on the lower sides of the relative ends of the front and rear support sliding plates 333. Waist-shaped avoidance sliding holes 337 are opened in the middle of the front and rear support sliding plates 333. A rotating shaft 338 is rotatably and penetratingly installed on the workbench 1. The rotating shaft 338 is simultaneously slidably connected to the front and rear waist-shaped avoidance sliding holes 337. A forward and reverse motor 339 is installed on the front end of the workbench 1 through a motor base. The output shaft of the forward and reverse motor 339 is fixedly connected to the rotating shaft 338. A gear column 340 is fixedly sleeved on the rotating shaft 338 at a position between the front and rear support sliding plates 333. The second rack 331 and the front and rear third racks 336 are both meshed with the gear column 340.

[0042] Refer to Figure 1 , Figure 2 and Figure 8, the blank holding part 34 includes support seats 341 installed at the opposite ends of the front and rear U-shaped vertical plates 2. The opposite ends of the front and rear support seats 341 are jointly installed with a U-shaped storage bin 342. The left end of the U-shaped storage bin 342 is provided with a feed inlet, and the lower end face of the U-shaped storage bin 342 is slidably attached to the first pusher plate 332. A rectangular avoidance sliding groove 343 is jointly formed in the upper part of the U-shaped storage bin 342, the front and rear support seats 341, and the front and rear U-shaped vertical plates 2. An installation plate 344 is slidably installed on the upper side inside the U-shaped storage bin 342. Two spring telescopic rods 345 are installed at the lower end of the installation plate 344, and a support sliding rod 346 is installed through the middle of the installation plate 344. The support sliding rod 346 is slidably connected to the rectangular avoidance sliding groove 343. Connecting shafts 347 are rotatably installed at the opposite ends of the front and rear U-shaped vertical plates 2. The front and rear connecting shafts 347 are both connected to the rotating shaft 338 through transmission belts, and turntables 348 are installed on the front and rear connecting shafts 347. Convex cylinders 349 are installed at the opposite ends of the front and rear turntables 348. A connecting rod 350 is rotatably sleeved on the convex cylinder 349. One end of the connecting rod 350 away from the turntable 348 is rotatably sleeved on the support sliding rod 346.

[0043] First, a plurality of blank plates to be stamped are placed in the U-shaped storage bin 342 through the feed inlet by an external feeding device. It should be noted that the first pusher plate 332 is initially located at the right side of the middle avoidance groove 31, the front and rear second pusher plates 335 are initially located at the left side of the corresponding avoidance groove 31, and the circular column 51 is initially located at the upper left side of the avoidance groove 52. At this time, the first pusher plate 332 will block the blank plate in the U-shaped storage bin 342 from moving downward.

[0044] Refer to Figure 1 、 Figure 2 、 Figure 5 and Fig.14, the loading and unloading cooperation mechanism 5 includes a circular column 51 arranged at the upper end of the workbench 1. The lower end of the circular column 51 is movably attached to the workbench 1. An avoidance groove 52 communicating with the first accommodation groove 41 is provided on the right side of the upper end of the workbench 1. A loading and unloading cooperation part 53 is jointly arranged on the circular column 51 and the front and rear C-shaped vertical plates 2, and a material discharging part 54 is jointly arranged on the circular column 51 and the avoidance groove 52. The loading and unloading cooperation part 53 includes a rectangular sliding plate 531 slidably installed between the front and rear C-shaped vertical plates 2. The rectangular sliding plate 531 is rotatably connected to the upper end of the circular column 51. The front and rear sides of the right end of the rectangular sliding plate 531 are connected to the corresponding C-shaped vertical plates 2 through compression springs. And support vertical plates 532 are symmetrically installed at the front and rear of the lower end of the rectangular sliding plate 531. Spring telescopic rods 533 are installed on the shorter segments on the right sides of the front and rear C-shaped vertical plates 2 through mounting seats. The telescopic ends of the spring telescopic rods 533 are fixedly connected to the corresponding support vertical plates 532. The left upper end of the rectangular sliding plate 531 is a wedge-shaped structure corresponding to the two shorter segments of the C-shaped pressing plate 42.

[0045] Refer to Figure 5 , Figure 6 and Fig.11 , the loading and unloading cooperation part 53 further includes rectangular grooves 534 symmetrically opened at the left and right of the lower end of the circular column 51. A cooperation sliding groove 535 is opened on the outer wall of the circular column 51. The cooperation sliding groove 535 is composed of two front and rear vertical guiding sliding grooves and two left and right spiral guiding sliding grooves. The two front and rear vertical guiding sliding grooves are arranged in a staggered manner up and down. An L-shaped support frame 536 is installed on the front side of the lower end of the C-shaped pressing plate 42. The L-shaped support frame 536 is slidably connected to the corresponding C-shaped vertical plate 2. And a kidney-shaped through hole 537 is opened on the horizontal section of the L-shaped support frame 536 corresponding to the position of the cooperation sliding groove 535. A kidney-shaped through hole 538 is opened on the front support vertical plate 532 corresponding to the position of the cooperation sliding groove 535. A semi-circular head sliding rod 539 is slidably installed on the kidney-shaped through hole 537 and the kidney-shaped through hole 538. The end of the semi-circular head sliding rod 539 away from the L-shaped support frame 536 is slidably connected to the cooperation sliding groove 535.

[0046] It should be noted that the front and rear annular support rods 432 and the second lead screws 433 initially extend out of the corresponding mounting barrels 431. Then, the servo motor 436 is used to control the forward rotation of the connected transmission shaft 435. Under the driving action of the transmission belt, the front and rear transmission shafts 435 will rotate synchronously. The front and rear transmission shafts 435 respectively drive the corresponding mounting barrels 431 to rotate forward. The front and rear mounting barrels 431 will drive the corresponding annular support rods 432 to rotate synchronously, causing the front and rear second lead screws 433 to move downward until they retract into the corresponding annular support rods 432. At this time, the front and rear second lead screws 433 together drive the U-shaped pressing plate 42 to move downward. During this period, the U-shaped pressing plate 42 will drive the semi-circular head slide rod 539 to move downward through the L-shaped support frame 536, and the semi-circular head slide rod 539 will slide downward along the vertical guiding chute on the upper side of the mating chute 535.

[0047] Refer to Fig.14 , when it is necessary to push the material plate into the first receiving groove 41 for the material pushing operation, first, the forward and reverse motor 339 is used to control the forward rotation of the rotating shaft 338. The rotating shaft 338 drives the gear column 340 to rotate. The gear column 340 is in transmission with the second rack 331 and the front and rear third racks 336. At this time, the second rack 331 will drive the first material pushing plate 332 to move leftward. The front and rear third racks 336 will drive the corresponding second material pushing plates 335 to move rightward through the corresponding support slides 333. During this period, the rotating shaft 338 drives the front and rear connecting shafts 347 to rotate synchronously through belt transmission. The front and rear connecting shafts 347 respectively drive the corresponding turntables 348 to rotate. The front and rear turntables 348 respectively drive the corresponding connecting rods 350 to rotate through the protruding cylinders 349. The front and rear connecting rods 350 together drive the support slide rod 346 to slide up and down reciprocally along the rectangular avoidance chute 343. The support slide rod 346 drives the front and rear second spring telescopic rods 345 to perform up and down reciprocating motions through the mounting plate 344, thereby achieving the effect of intermittently pressing multiple material plates. And when multiple material plates are blocked by the first material pushing plate 332 and move downward, the front and rear second spring telescopic rods 345 can perform adaptive telescopic compensation. When the first material pushing plate 332 moves to the leftmost position of the middle avoidance groove 31, the first material pushing plate 332 will no longer block the downward movement of multiple material plates. At this time, the lowermost material plate in the loop-shaped storage bin 342 will slide onto the workbench 1 under the pressing action of the front and rear second spring telescopic rods 345, and the upper end surface of the first material pushing plate 332 is flush with the material plate on the workbench 1.

[0048] Continue to control the reverse rotation of the rotating shaft 338 by the forward and reverse motor 339. The rotating shaft 338 drives the gear column 340 to rotate. The gear column 340 is in transmission with the second rack 331 and the front and rear third racks 336, driving the first push plate 332 to move to the right, and at the same time driving the front and rear second push plates 335 to move to the left. At this time, the first push plate 332 will push the corresponding material plate to move to the upper end position of the first receiving groove 41 and slide into the first receiving groove 41 under the limiting action of the inner wall of the rectangular groove 534 on the left side of the circular column 51. After the feeding and discharging matching mechanism 5 uses the inner wall of the rectangular groove 534 on the left side of the circular column 51 for material blocking and limiting, the material plate is pushed into the first receiving groove 41 by the pushing mechanism 3 to ensure that the workpiece to be punched accurately enters the punching cavity, thus completing the automatic feeding work. The feeding and discharging time matches the processing time, avoiding the problem of affecting the overall production efficiency when the processing equipment is idle.

[0049] Refer to Figure 3 、 Figure 4-Figure 7 and Fig.15 , the punching part 44 includes the front and rear two supporting seats 441 installed in the first receiving groove 41. A supporting sliding plate 442 is slidably installed between the front and rear two supporting seats 441. The upper left end of the supporting sliding plate 442 is a wedge-shaped structure. The lower end of the workbench 1 is penetrated and installed with the front and rear two spring telescopic rods three 443. The telescopic ends of the front and rear two spring telescopic rods three 443 are fixedly connected to the supporting sliding plate 442. The U-shaped pressing plate 42 is penetrated and installed with the front and rear two hydraulic push rods 444. The telescopic ends of the front and rear two hydraulic push rods 444 are correspondingly fixedly connected with a punching plate 445.

[0050] Refer to Fig.15, when stamping the material plate is required, it should be noted that after the material plate slides into the first receiving groove 41, it will land on the upper ends of the front and rear supporting seats 441. Then, the servo motor 436 is controlled to drive the connected transmission shaft 435 to rotate forward. Under the driving action of the transmission belt, the front and rear transmission shafts 435 respectively drive the corresponding mounting barrels 431 to rotate forward. At this time, the front and rear annular support rods 432 will move downward until they retract into the corresponding mounting barrels 431. The front and rear annular support rods 432 will jointly drive the C-shaped pressing plate 42 to move downward again through the corresponding second lead screws 433. The C-shaped pressing plate 42 will squeeze the rectangular sliding plate 531 to make it move to the right. The rectangular sliding plate 531 will drive the circular column 51 to move to the right. During this period, the C-shaped pressing plate 42 will drive the semi-circular head sliding rod 539 to move downward through the L-shaped support frame 536. The semi-circular head sliding rod 539 will slide along the spiral guiding groove on the matching chute 535 until the circular column 51 rotates 180 degrees. At this time, the end of the circular column 51 with the second rectangular mounting groove 541 faces to the left. Then, control the front and rear hydraulic push rods 444 to jointly drive the stamping plate 445 to move downward to stamp the material plate. During this period, under the squeezing action of the stamping plate 445, the supporting sliding plate 442 will move downward, and the front and rear third spring telescopic rods 443 will perform adaptive telescoping.

[0051] Refer to Fig.16 , when the material plate after stamping needs to be unloaded, the servo motor 436 is controlled to drive the connected transmission shaft 435 to rotate in reverse. Under the limiting action of the annular sliding plate 434, the front and rear transmission shafts 435 respectively drive the corresponding mounting barrels 431 to rotate in reverse. At this time, the front and rear annular support rods 432 will move upward until they extend out of the corresponding mounting barrels 431. The front and rear annular support rods 432 will jointly drive the C-shaped pressing plate 42 to move upward through the corresponding second lead screws 433. After the rectangular sliding plate 531 loses the squeezing action of the C-shaped pressing plate 42, under the action of the compression spring and the first spring telescopic rod 533, the rectangular sliding plate 531 will move to the left to return to its original position. The rectangular sliding plate 531 will drive the circular column 51 to move to the left to return to its original position. During this period, the C-shaped pressing plate 42 will drive the semi-circular head sliding rod 539 to move upward through the L-shaped support frame 536. The semi-circular head sliding rod 539 will slide upward along the vertical guiding groove on the lower side of the matching chute 535. It should be noted that under the action of the third spring telescopic rod 443, the stamped material plate will move upward with the stamping plate 445 until the lower end surface of the stamped material plate is flush with the upper end surface of the workbench 1. The secondary lifting and stamping mechanism 4 can drive the C-shaped pressing plate 42 to perform secondary lifting in sequence. During this period, the circular column 51 can be controlled to move to the right and then stamp the material plate, and the circular column 51 can be controlled to rotate 180 degrees for rotation and position conversion, which is convenient for quickly putting the stamped parts into the second rectangular mounting groove 541 for rapid transfer later, so as to complete the automatic blanking work, avoid damage or deformation of the material plate caused by improper manual operation, and effectively improve the stamping work efficiency and processing quality.

[0052] Refer to Figure 11-13 , the material discharging part 54 includes a rectangular mounting groove II 541 opened on the inner wall at the right end of the left rectangular groove 534. Rectangular mounting grooves III 542 are opened on the front and rear inner walls of the rectangular mounting groove II 541. A trapezoidal push plate 543 is slidably connected in the rectangular mounting groove II 541 through a plurality of tension springs. Trapezoidal clamping plates 544 are slidably connected in the front and rear rectangular mounting grooves III 542 through compression springs. A U-shaped material retaining plate 545 is jointly installed on the front and rear inner walls at both ends of the avoidance groove II 52. The lower end of the circular column 51 is movably attached to the U-shaped material retaining plate 545.

[0053] Refer to Figure 11-13 , the material discharging part 54 further includes a rack I 546 installed on the rear side of the inner wall at the bottom end of the avoidance groove II 52, a material receiving inclined plate 547 installed on the right side of the inner wall at the bottom end of the avoidance groove II 52. The left end of the material receiving inclined plate 547 is fixedly connected to the U-shaped material retaining plate 545. A lead screw I 548 is rotatably installed on the upper inner wall of the rectangular mounting groove II 541. The lead screw I 548 is threadedly connected to a trapezoidal pushing plate 549 slidably connected in the rectangular mounting groove II 541. And a transmission gear 550 is installed at the lower end of the lead screw I 548. The transmission gear 550 meshes with the rack I 546.

[0054] During the leftward movement of the circular column 51, the circular column 51 will drive the transmission gear 550 to move leftward through the lead screw I 548. The transmission between the transmission gear 550 and the rack I 546 will drive the trapezoidal pushing plate 549 to move downward. At this time, after the trapezoidal push plate 543 loses the pushing action of the trapezoidal pushing plate 549, under the action of the tension spring, the trapezoidal push plate 543 will move rightward and retract into the rectangular mounting groove II 541. During this period, the front and rear trapezoidal clamping plates 544 will first adaptively retract into the corresponding rectangular mounting grooves III 542 and then extend out of the corresponding rectangular mounting grooves III 542.

[0055] When the circular column 51 moves leftward to return to its original position and it is necessary to perform the material discharging and transfer work on the stamped sheet, continue to control the rotating shaft 338 to rotate forward through the forward and reverse motor 339. At this time, the first push plate 332 will move leftward, and the front and rear second push plates 335 will move rightward to jointly push the stamped sheet, pushing it into the rectangular mounting groove II 541. During this period, the front and rear trapezoidal clamping plates 544 will again adaptively retract into the corresponding rectangular mounting grooves III 542 and then extend into the corresponding rectangular mounting grooves III 542 and jointly clamp the stamped sheet.

[0056] Next, the servo motor 436 is used to control the reverse rotation of the connected transmission shaft 435 again. Under the limiting effect of the corresponding annular slide plate 434, the two mounting barrels 431 will drive the corresponding annular support rods 432 to rotate synchronously, so that the front and rear second lead screws 433 move upward until they extend out of the corresponding annular support rods 432 and return to their original positions. At this time, the front and rear second lead screws 433 together drive the U-shaped pressing plate 42 to move upward. During this period, the U-shaped pressing plate 42 will drive the semi-circular head slide rod 539 to move upward through the L-shaped support frame 536. The semi-circular head slide rod 539 will slide along the spiral guiding chute on the matching chute 535 until the circular column 51 rotates 180 degrees and returns to its original position. At this time, the stamped material plate will follow the circular column 51 and rotate 180 degrees.

[0057] Then, repeat the above steps of controlling the U-shaped vertical plate 2 to move downward in sequence by the servo motor 436. Push the material plate into the first receiving groove 41 again and perform stamping. During this period, the circular column 51 will move to the right. The circular column 51 will drive the transmission gear 550 to move to the right through the first lead screw 548. The transmission gear 550 is in transmission with the first rack 546, which will drive the trapezoidal pushing plate 549 to move upward. At this time, under the pushing action of the trapezoidal pushing plate 549, the trapezoidal push plate 543 will push the stamped material plate to move to the right, so that it slowly exits the second rectangular installation groove 541 and is discharged by the receiving inclined plate 547. It should be noted that during the rightward movement of the stamped material plate, the U-shaped material blocking plate 545 can prevent the stamped material plate from falling into the second avoidance groove 52. After the material pushing mechanism 3 pushes the material plate into the second rectangular installation groove 541, the secondary lifting and stamping mechanism 4 is used to control the circular column 51 to rotate 180 degrees and return to its original position again. And during the process of driving the circular column 51 to move to the right by the loading and unloading cooperation mechanism 5, control the trapezoidal push plate 543 to push the stamped material plate to move to the right, so that it slowly exits the second rectangular installation groove 541 to complete the discharging work, effectively improving the stamping work efficiency.

[0058] In the description of the embodiments of the present invention, it should be noted that the terms: "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the embodiments of the present invention. In addition, in the description of the present invention, unless otherwise specified, the meanings of "multiple", "multiple roots", and "multiple groups" are two or more.

[0059] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A punching device for processing special-shaped hard alloy parts, comprising a workbench (1), characterized in that: On the upper end of the workbench (1), C-shaped vertical plates (2) are symmetrically installed in the front and back. On the workbench (1) and the two C-shaped vertical plates (2) in the front and back, a material pushing mechanism (3) is jointly arranged on the left side. On the workbench (1) and the two C-shaped vertical plates (2) in the front and back, a secondary lifting and stamping mechanism (4) is jointly arranged in the middle. On the workbench (1) and the two C-shaped vertical plates (2) in the front and back, a loading and unloading cooperation mechanism (5) is jointly arranged on the right side; The secondary lifting and stamping mechanism (4) includes a first accommodating groove (41) opened in the middle of the upper end of the workbench (1). A C-shaped pressing plate (42) is slidably installed on the two C-shaped vertical plates (2) in the front and back. The right lower ends of the two shorter segments of the C-shaped pressing plate (42) are wedge-shaped structures. A secondary lifting part (43) is jointly arranged on the workbench (1) and the C-shaped pressing plate (42). A stamping part (44) is arranged on the C-shaped pressing plate (42) at a position corresponding to the first accommodating groove (41); The material pushing mechanism (3) includes a plurality of first avoiding grooves (31) evenly distributed from front to back opened on the left side of the upper end of the workbench (1). A rectangular installation groove (32) is jointly opened on the inner walls of the bottoms of the plurality of first avoiding grooves (31). The plurality of first avoiding grooves (31) and the rectangular installation groove (32) are both communicated with the first accommodating groove (41). A material pushing part (33) is jointly arranged on the plurality of first avoiding grooves (31) and the rectangular installation groove (32). A material pressing part (34) is jointly arranged on the material pushing part (33) and the two C-shaped vertical plates (2) in the front and back; The loading and unloading cooperation mechanism (5) includes a circular column (51) arranged on the upper end of the workbench (1). The lower end of the circular column (51) is movably attached to the workbench (1). A second avoiding groove (52) communicated with the first accommodating groove (41) is opened on the right side of the upper end of the workbench (1). A loading and unloading cooperation part (53) is jointly arranged on the circular column (51) and the two C-shaped vertical plates (2) in the front and back. A material discharging part (54) is jointly arranged on the circular column (51) and the second avoiding groove (52).

2. A punching device for processing special-shaped hard alloy parts according to claim 1, characterized in that: The loading and unloading cooperation part (53) includes a rectangular sliding plate (531) slidably installed between the two C-shaped vertical plates (2) in the front and back. The rectangular sliding plate (531) is rotatably connected to the upper end of the circular column (51). The front and back sides of the right end of the rectangular sliding plate (531) are connected to the corresponding C-shaped vertical plates (2) through compression springs. And supporting vertical plates (532) are symmetrically installed on the front and back of the lower end of the rectangular sliding plate (531). Spring telescopic rods (533) are installed on the shorter segments on the right sides of the two C-shaped vertical plates (2) through mounting seats. The telescopic ends of the spring telescopic rods (533) are fixedly connected to the corresponding supporting vertical plates (532). The left upper end of the rectangular sliding plate (531) is wedge-shaped at positions corresponding to the two shorter segments of the C-shaped pressing plate (42).

3. A punching device for processing special-shaped hard alloy parts according to claim 2, characterized in that: The loading and unloading cooperation part (53) further includes rectangular grooves (534) symmetrically arranged on the left and right sides at the lower end of the circular column (51). A cooperation sliding groove (535) is formed on the outer wall of the circular column (51). The cooperation sliding groove (535) is composed of two vertical guiding sliding grooves in the front and back and two spiral guiding sliding grooves in the left and right. The two vertical guiding sliding grooves in the front and back are arranged in a vertically staggered manner. An L-shaped support frame (536) is installed on the front side of the lower end of the U-shaped pressing plate (42). The L-shaped support frame (536) is slidably connected to the corresponding U-shaped vertical plate (2). A waist-shaped through hole one (537) is formed in the horizontal section of the L-shaped support frame (536) at the position corresponding to the cooperation sliding groove (535). A waist-shaped through hole two (538) is formed in the front support vertical plate (532) at the position corresponding to the cooperation sliding groove (535). A semi-circular head sliding rod (539) is slidably installed on the waist-shaped through hole one (537) and the waist-shaped through hole two (538). One end of the semi-circular head sliding rod (539) away from the L-shaped support frame (536) is slidably connected to the cooperation sliding groove (535).

4. The punching device for processing special-shaped hard alloy parts according to claim 3, characterized in that: The material discharging part (54) includes a rectangular installation groove two (541) formed on the inner wall of the right end of the left rectangular groove (534). Rectangular installation grooves three (542) are formed on the front and back inner walls of the rectangular installation groove two (541). A trapezoidal push plate (543) is slidably connected to the rectangular installation groove two (541) through a plurality of tension springs. Trapezoidal clamping plates (544) are slidably connected to the two rectangular installation grooves three (542) in the front and back through compression springs. A U-shaped material blocking plate (545) is installed on the common inner walls of the front and back ends of the avoidance groove two (52). The lower end of the circular column (51) is movably attached to the U-shaped material blocking plate (545).

5. The punching device for processing special-shaped hard alloy parts according to claim 4, characterized in that: The material discharging part (54) further includes a rack one (546) installed on the rear side of the inner wall of the bottom end of the avoidance groove two (52), a material receiving inclined plate (547) installed on the right side of the inner wall of the bottom end of the avoidance groove two (52). The left end of the material receiving inclined plate (547) is fixedly connected to the U-shaped material blocking plate (545). A lead screw one (548) is rotatably installed on the upper inner wall of the rectangular installation groove two (541). The lead screw one (548) is threadedly connected to a trapezoidal pushing plate (549) slidably connected to the rectangular installation groove two (541). A transmission gear (550) is installed at the lower end of the lead screw one (548). The transmission gear (550) meshes with the rack one (546).

6. The punching device for processing special-shaped hard alloy parts according to claim 1, characterized in that: The secondary lifting part (43) includes mounting barrels (431) symmetrically and rotatably installed at the front and back of the upper end of the workbench (1). A ring-shaped support rod (432) is threadedly connected to the inner wall of the mounting barrel (431). A second lead screw (433) is threadedly connected to the inner wall of the ring-shaped support rod (432). Ring-shaped sliding plates (434) are fixedly sleeved on the lower ends of the ring-shaped support rod (432) and the second lead screw (433). The outer walls of the two ring-shaped sliding plates (434) are respectively slidably connected to the inner walls of the mounting barrel (431) and the ring-shaped support rod (432). The upper ends of the front and rear second lead screws (433) are fixedly connected to the U-shaped pressing plate (42). Drive shafts (435) rotatably penetrating through the workbench (1) are installed at the lower ends of the front and rear mounting barrels (431). The lower ends of the front and rear drive shafts (435) are connected by a transmission belt. A servo motor (436) is installed at the lower end of the workbench (1) through a motor base. The output shaft of the servo motor (436) is fixedly connected to any one of the drive shafts (435).

7. The punching device for processing special-shaped hard alloy parts according to claim 1, characterized in that: The material pushing part (33) includes a second rack (331) slidably installed on the right side in the middle avoidance groove one (31). A first material pushing plate (332) slidably connected to the workbench (1) is installed at the upper end of the second rack (331). Support sliding plates (333) are slidably installed on the left sides in the front and rear avoidance grooves one (31). The front and rear support sliding plates (333) are both slidably connected to the rectangular installation groove one (32). And accommodation grooves two (334) are opened at the upper ends of the front and rear support sliding plates (333). A second material pushing plate (335) is connected to the accommodation groove two (334) through a plurality of spring telescopic rods. The right lower end of the second material pushing plate (335) is of a wedge-shaped structure.

8. The punching device for processing special-shaped hard alloy parts according to claim 7, characterized in that: The material pushing part (33) further includes third racks (336) installed on the lower sides of the opposite ends of the front and rear support sliding plates (333). Waist-shaped avoidance sliding holes (337) are opened in the middle of the front and rear support sliding plates (333). A rotating shaft (338) is rotatably penetrating through the workbench (1). The rotating shaft (338) is simultaneously slidably connected to the front and rear waist-shaped avoidance sliding holes (337). A forward and reverse motor (339) is installed at the front end of the workbench (1) through a motor base. The output shaft of the forward and reverse motor (339) is fixedly connected to the rotating shaft (338). A gear column (340) is fixedly sleeved on the rotating shaft (338) at the position between the front and rear support sliding plates (333). The second rack (331) and the front and rear third racks (336) are all meshed with the gear column (340).

9. The punching device for processing special-shaped hard alloy parts according to claim 8, characterized in that: The blank holding part (34) includes support seats (341) installed at the relative ends of the front and rear U-shaped vertical plates (2). The relative ends of the front and rear support seats (341) are jointly installed with a U-shaped storage bin (342). The left end of the U-shaped storage bin (342) has a feed inlet, and the lower end surface of the U-shaped storage bin (342) is slidably attached to the first pushing plate (332). A rectangular avoidance sliding groove (343) is jointly formed in the upper part of the U-shaped storage bin (342), the front and rear support seats (341), and the front and rear U-shaped vertical plates (2). An installation plate (344) is slidably installed on the upper side inside the U-shaped storage bin (342). Two spring telescopic rods two (345) are installed at the lower end of the installation plate (344), and a support sliding rod (346) is installed through the middle of the installation plate (344). The support sliding rod (346) is slidably connected to the rectangular avoidance sliding groove (343). Connecting shafts (347) are rotatably installed at the opposite ends of the front and rear U-shaped vertical plates (2). The front and rear connecting shafts (347) are both connected to the rotating shaft (338) through transmission belts, and turntables (348) are installed on the front and rear connecting shafts (347). Convex cylinders (349) are installed at the opposite ends of the front and rear turntables (348). A connecting rod (350) is rotatably sleeved on the convex cylinder (349). The end of the connecting rod (350) far from the turntable (348) is rotatably sleeved on the support sliding rod (346).

10. The punching device for processing special-shaped hard alloy parts according to claim 1, characterized in that: The stamping part (44) includes two front and rear supporting seats (441) installed in the first accommodating groove (41). A supporting sliding plate (442) is slidably installed between the two front and rear supporting seats (441). The upper left end of the supporting sliding plate (442) is a wedge-shaped structure. Two spring telescopic rods three (443) are installed through the lower end of the workbench (1). The telescopic ends of the two spring telescopic rods three (443) are fixedly connected to the supporting sliding plate (442). Two hydraulic push rods (444) are installed through the U-shaped pressing plate (42). The telescopic ends of the two hydraulic push rods (444) are correspondingly fixedly connected to a stamping plate (445).

Images