CN118023596A - Pendulum shear equipment with zigzag cutter - Google Patents

Abstract

The invention provides pendulum shearing equipment with a saw-tooth cutter, which belongs to the technical field of metal plate cutting and comprises a workbench, wherein a driving mechanism is arranged above the workbench, and cutting mechanisms are symmetrically arranged at the left end and the right end of the driving mechanism. The detachable type cutting tool bit is assembled, is different from the integral disassembly of the traditional integrated type cutting tool, and can be replaced and installed in time in a targeted manner, so that the utilization rate and the replacement efficiency of the cutting tool bit are greatly improved, and the cost of cutting production is saved; make every cutter head all be in independent installed state, effectively increased the stability when cutter head cuts sheet metal, cutter assembly passes through solitary cutter head and sheet metal contact, and every cutter head homoenergetic independently bears the recoil that receives in the cutting process to on making cutter assembly received recoil evenly distributed to each cutter head, and then extension cutter head's life.

Description

A swing shearing device with a sawtooth-shaped knife

Technical Field

The invention relates to the technical field of metal plate cutting, in particular to an oscillating shearing device with a sawtooth-shaped cutter.

Background technique

The swing shearing equipment is a kind of mechanical equipment used for metal processing, which is mainly used for continuous vertical shearing processing of metal materials by reciprocating up and down. At present, when the swing shearing equipment is used to cut metal sheets, a complete metal sheet is usually cut into two serrated metal sheets by a tool that moves reciprocatingly up and down, as shown in Figure 12. The serrated edge design helps the metal sheets to form better connections during the forming process, and the bearing capacity and stability of the serrated metal sheets are relatively higher than those of the flat-cut metal sheets. The products formed from the serrated metal sheets are also correspondingly more solid.

However, the following problems still exist in the process of shearing serrated metal sheets: 1. An integrated tool is usually used to shear the metal sheets. However, due to the special shape of the serrated metal sheets, the resistance encountered by some cutter heads during the cutting process may cause the cutter heads of the integrated tool to shift, loosen or be affected in other ways. At the same time, the fixing method of the integrated tool is relatively simple, the blade is prone to swing, the blades are difficult to fit closely together, and the stability is low, which makes it difficult to cut the metal sheets efficiently and with high quality, and the cutting effect of the metal sheets is poor.

2. When using an integrated tool to cut serrated metal sheets, the cutting line speed is fast, resulting in a high wear rate of the tool and a shortened tool life. When cutting metal sheets in large quantities, the tool needs to be replaced frequently, and the replacement efficiency is low. At the same time, there is a situation where only part of the cutter head is damaged. The overall replacement not only wastes tool resources and replacement time, but also greatly increases production costs.

Therefore, in order to solve the problems existing in the shearing and forming process of serrated metal sheets, the present invention provides a swing shearing device with a serrated tool.

Summary of the invention

The invention provides an oscillating shearing device with a sawtooth-shaped cutter, comprising a workbench, a driving mechanism is arranged above the workbench, and cutting mechanisms are symmetrically arranged at the left and right ends of the driving mechanism.

The cutting mechanism includes a mounting plate, an upper mold frame is arranged at the upper end of the mounting plate, a through groove is opened on the upper mold frame, a vertical rod penetrating the through groove is installed at the upper end of the mounting plate, a rectangular plate is rotatably installed at the upper end of the vertical rod, the mounting plate is detachably connected to the upper mold frame through the cooperation between the vertical rod, the rectangular plate and the through groove, a No. 2 bolt is arranged on the side close to the left and right upper mold frames, and the No. 2 bolt penetrates the vertical rod and is fixedly connected with the upper mold frame with a thread.

A triangular bracket which is evenly arranged from front to back and has a sawtooth shape as a whole is installed at the lower end of the mounting plate. A cutter assembly is arranged on the triangular bracket. The cutter assembly includes two cutting heads which are symmetrical front to back and fit with the inclined section of the triangular bracket. A Y-shaped bracket which is fixedly connected to the lower end surface of the mounting plate is arranged between the front and rear inclined sections of the triangular bracket. A No. 1 bolt is arranged on the side of the cutting head away from the inclined section of the triangular bracket. The No. 1 bolt slides through the cutting head and the inclined section of the triangular bracket and is threadedly connected with the inclined section of the Y-shaped bracket. A positioning piece for aligning the triangular bracket with the cutting head is arranged at the tip of the triangular bracket.

In one possible implementation, the driving mechanism includes a gantry mounted on the upper middle end of the workbench, a hydraulic cylinder is installed at the lower end of the horizontal section of the gantry, the lower end of the push end of the hydraulic cylinder is fixedly connected to a connecting frame installed between the left and right upper mold frames, the front and rear ends of the upper mold frame are respectively slidably connected to guide columns symmetrically installed on the upper end of the workbench, the outer sleeve of the guide column is provided with a buffer spring located between the upper mold frame and the workbench, a rectangular through groove is opened at the upper end of the workbench, a lower mold cavity is symmetrically installed between the front and rear inner walls of the rectangular through groove, the sides of the left and right lower mold cavities away from each other are both in a serrated shape complementary to the triangular bracket and the cutting knife assembly, and a blanking assembly for blanking the cut metal sheet is arranged in the rectangular through groove.

In a possible implementation, the lower end of the upper mold frame is provided with a pressing mechanism, which includes a pressing plate 1 arranged at the lower end of the upper mold frame, and a connecting spring evenly arranged from front to back is connected between the upper end surface of the pressing plate 1 and the lower end surface of the upper mold frame, and the lower end of the left and right upper mold frames is provided with a front-to-back symmetrical pressing rod, and a convex section is installed at the lower end of the pressing rod, and a pressing plate 2 is provided below the front and rear pressing rods, and the front and rear ends of the pressing plate 2 are respectively fixedly mounted on the outside of the fixed column, and the upper end of the fixed column is provided with an alignment groove that is plug-matched with the convex section, and the upper end of the workbench is provided with an upper cylindrical groove that is slidably connected to the corresponding fixed column, and the lower end of the upper cylindrical groove is provided with a lower cylindrical groove, and the diameter of the lower cylindrical groove is larger than the diameter of the upper cylindrical groove, and the fixed column is slidably connected to the lower cylindrical groove through the sliding circular plate at its lower end, and a tension spring is connected between the bottom wall of the upper cylindrical groove and the lower end surface of the pressing plate 2.

In one possible implementation, the blanking assembly includes a pallet for placing metal sheets, and pallets are respectively arranged on the left and right sides of the left and right lower mold cavities, and rollers distributed in a matrix are rotatably installed on the upper end of the pallet, and a pressure plate is installed on the upper end of the pallet close to the sawtooth shape of the lower mold cavity. The end of the pallet close to the lower mold cavity is rotatably installed between the front and rear inner walls of the rectangular through groove through a torsion spring shaft, an electric push rod is installed at the lower end of the lower mold cavity, and a push plate is installed at the lower end of the pushing end of the electric push rod, and support plates for supporting the pallets are installed on the upper ends of the left and right sides of the push plate, a movable material receiving frame is arranged at the lower end of the workbench, and a fixing mechanism for limiting the metal sheet is arranged on the upper end of the pallet.

In one possible implementation, the fixing mechanism includes an L-shaped baffle, and the upper end of the support plate on the side close to the lower mold cavity is provided with a front-to-back symmetrical L-shaped baffle, the longitudinal section of the L-shaped baffle is longer than the transverse section, and the upper end of the support plate on the side away from the lower mold cavity is provided with a front-to-back symmetrical transverse baffle, the side of the transverse baffle away from the lower mold cavity is slidably installed with a longitudinal baffle, and the side where the front and rear longitudinal baffles are close to each other is symmetrically installed with inclined sections inclined outwards, and the front and rear transverse baffles are symmetrically provided with adjustment components for adjusting the positions of the transverse baffles and the L-shaped baffles on the side away from the front and rear L-shaped baffles, and the front and rear transverse baffles are symmetrically provided with linkage components on the end away from the front and rear L-shaped baffles.

In one possible implementation, the adjustment assembly includes adjustment blocks installed on the upper ends of the front and rear L-shaped baffles and the front and rear cross baffles on the side away from each other, the front and rear adjustment blocks on the same side are arranged at the upper end of the horizontal section of the same inverted shaped plate, the upper end of the workbench is provided with left-right symmetrical sliding grooves, the vertical sections on the left and right sides of the inverted shaped plate are slidably connected with the corresponding sliding grooves, the horizontal section of the inverted shaped plate is provided with sockets evenly arranged from left to right, the corresponding adjustment blocks are plugged into and matched with the sockets through plug rods, a connecting rod is installed in the middle of the side away from each other of the front and rear inverted shaped plates, a vertical plate is installed on the upper end of the connecting rod, a bidirectional electric telescopic rod is connected between the front and rear vertical plates, and the bidirectional electric telescopic rod is installed between the front and rear vertical sections of the gantry through a support.

In one possible implementation, the linkage assembly includes a side rack, which is installed at the end away from the front and rear longitudinal baffles, and the upper end of the side rack is meshed with a side gear, and the side gear is fixedly sleeved on the outside of a circular sleeve, and the inner ring wall of the fixed sleeve and the gear column are matched by splines. The left and right ends of the gear column are rotatably connected to the vertical plate installed on the end surface of the workbench, and a middle rack is installed at the lower end of the side away from the front and rear vertical plates. Bottom through grooves for the sliding of the middle rack are provided on the front and rear vertical sections of the gantry, and a middle gear meshed with the middle rack is fixedly sleeved in the middle of the gear column.

In one possible implementation, a loading mechanism is arranged on the front side of the workbench, and the loading mechanism includes a loading device that is symmetrical on the left and right. The loading device is slidably arranged on the upper end of the base plate, and horizontal racks are installed at the front end of the left loading device and the rear end of the right loading device. The same driving gear is meshed between the front and rear horizontal racks, and the driving gear is rotatably installed on the upper end of the base plate.

In one possible implementation, the alignment member includes an alignment rod installed through the tip of a triangular bracket, the alignment rod and the triangular bracket are fixedly connected, and the front and rear cutting heads on the same triangular bracket are respectively installed with alignment plates that are plugged into and cooperate with the upper and lower ends of the alignment rod on one side close to the inclined section of the triangular bracket.

In a possible implementation, the sides of the cutting heads on the same triangular bracket that are close to each other are concave-convex fitted, and the end of the cutting head away from the tip of the triangular bracket is also concave-convex fitted to the triangular bracket.

Beneficial effects of the present invention: 1. A swing shearing device with a serrated tool provided according to an embodiment of the present invention assembles the cutting head in a detachable manner, which is different from the overall disassembly of a traditional integrated tool. The damaged cutting head can be replaced and installed in a timely manner, which greatly improves the utilization rate and replacement efficiency of the cutting head and saves the cost of cutting production.

2. According to an embodiment of the present invention, a swing shearing device with a serrated tool is provided. The cutting heads are assembled one by one through the cooperation between the No. 1 bolt, the triangular bracket and the Y-shaped bracket, so that each cutting head is in an independent installation state, which effectively increases the stability of the cutting head when cutting metal plates. In addition, the surface of the metal plate may be uneven, which will cause uneven force when the integral cutter head contacts the metal plate, thereby generating uneven recoil force. However, the cutting knife assembly contacts the metal plate through a separate cutting head, and each cutting head can independently withstand the recoil force received during the cutting process, so that the recoil force received by the cutting knife assembly is evenly distributed to each cutting head, thereby extending the service life of the cutting head.

3. According to an embodiment of the present invention, a swing shearing device with a serrated knife is provided. When the cutter assembly is used to a certain extent, the mounting plate and the cutter assembly can be removed from the upper mold frame as a whole by tightening the No. 2 bolt and rotating the rectangular block, so that the cutter assembly can be replaced as a whole, thereby increasing the replacement efficiency of the cutter assembly and optimizing the cutting effect of the cutting head on the metal plate.

In addition to the technical problems solved by the embodiments of the present invention described above, the technical features that constitute the technical scheme, and the beneficial effects brought about by the technical features of the technical scheme, other technical problems that can be solved by a swinging shearing device with a serrated cutter provided in the embodiments of the present application, other technical features included in the technical scheme, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation manner.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

FIG. 1 is a schematic diagram of a front-view stereoscopic structure of the present invention.

FIG. 2 is a schematic diagram of the three-dimensional structure of the driving mechanism and the cutting mechanism of the present invention.

FIG. 3 is a schematic diagram of the three-dimensional structure of the cutting mechanism and the edge pressing mechanism of the present invention.

FIG. 4 is a schematic diagram of the three-dimensional structure of the fixing mechanism, the adjustment assembly and the linkage assembly of the present invention.

FIG. 5 is an enlarged structural schematic diagram of the A region in FIG. 4 of the present invention.

FIG. 6 is a schematic diagram of the three-dimensional structure of the pressing plate 2, the fixing column and the tension spring of the present invention.

FIG. 7 is a schematic cross-sectional plan view of the blanking assembly of the present invention.

FIG8 is a schematic diagram of the three-dimensional structure of the mounting plate, the upper mold frame and the pressing plate 1 of the present invention.

FIG. 9 is a schematic diagram of the three-dimensional structure of the mounting plate and the cutter assembly of the present invention.

FIG. 10 is a schematic diagram of the three-dimensional structure of the cutter assembly of the present invention.

FIG. 11 is a partial cross-sectional structural schematic diagram of FIG. 10 of the present invention.

FIG. 12 is a schematic diagram of the planar structure of the metal plate of the present invention.

In the figure: 1. workbench; 111. feeding device; 113. horizontal rack; 114. driving gear; 2. driving mechanism; 21. gantry; 22. hydraulic cylinder; 23. connecting frame; 24. guide column; 25. buffer spring; 26. lower die cavity; 3. cutting mechanism; 31. mounting plate; 32. upper die frame; 321. pressing plate 1; 322. connecting spring; 323. pressing rod; 324. pressing plate 2; 325. fixing column; 326. alignment groove; 327. upper cylindrical groove; 328. lower cylindrical groove; 329. stretching spring; 33. through groove; 34. rectangular plate; 35. triangular bracket; 36. cutting Knife assembly; 361, cutting head; 362, Y-shaped bracket; 363, alignment rod; 364, alignment plate; 371, support plate; 372, pressure plate; 373, electric push rod; 374, push plate; 375, support plate; 376, material receiving frame; 381, L-shaped baffle; 382, horizontal baffle; 383, vertical baffle; 384, adjustment block; 385, inverted plate; 386, sliding groove; 388, insertion rod; 389, vertical plate; 390, two-way electric telescopic rod; 391, side rack; 392, side gear; 393, gear column; 394, middle rack; 395, middle gear; 4, metal plate.

Detailed ways

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

Please refer to Figures 1 and 12, a swing shearing device with a sawtooth-shaped knife includes a workbench 1, a driving mechanism 2 is arranged above the workbench 1, and cutting mechanisms 3 are symmetrically arranged at the left and right ends of the driving mechanism 2.

Please refer to Figures 1, 3 and 8. The cutting mechanism 3 includes a mounting plate 31, an upper mold frame 32 is arranged on the upper end of the mounting plate 31, a through slot 33 is opened on the upper mold frame 32, a vertical rod penetrating the through slot 33 is installed on the upper end of the mounting plate 31, a rectangular plate 34 is rotatably installed on the upper end of the vertical rod, the mounting plate 31 is detachably connected to the upper mold frame 32 through the cooperation between the vertical rod, the rectangular plate 34 and the through slot 33, and a No. 2 bolt is arranged on the side close to the left and right upper mold frames 32, and the No. 2 bolt penetrates the vertical rod and is threadedly fixedly connected to the upper mold frame 32.

Please refer to Figures 8, 9, 10 and 11. The lower end of the mounting plate 31 is mounted with triangular brackets 35 that are evenly arranged from front to back and are in a serrated shape as a whole. A cutter assembly 36 is arranged on the triangular bracket 35. The cutter assembly 36 includes two cutting heads 361 that are symmetrical front to back and fit with the inclined section of the triangular bracket 35. A Y-shaped bracket 362 that is fixedly connected to the lower end surface of the mounting plate 31 is arranged between the front and rear inclined sections of the triangular bracket 35. A No. 1 bolt is arranged on one side of the cutting head 361 away from the inclined section of the triangular bracket 35. The No. 1 bolt slides through the cutting head 361 and the inclined section of the triangular bracket 35 and then fits with the inclined section of the Y-shaped bracket 362. The triangle bracket 35 is threadedly connected, and the tip of the triangle bracket 35 is provided with an alignment piece for aligning the triangle bracket 35 with the cutting head 361. The alignment piece includes an alignment rod 363 installed through the tip of the triangle bracket 35, and the alignment rod 363 is fixedly connected to the triangle bracket 35. The front and rear cutting heads 361 on the same triangle bracket 35 are respectively installed with alignment plates 364 that are plugged into and matched with the upper and lower ends of the alignment rod 363 on one side close to the inclined section of the triangle bracket 35. The front and rear cutting heads 361 on the same triangle bracket 35 are close to each other on one side with a concave-convex fit, and the end of the cutting head 361 away from the tip of the triangle bracket 35 is also a concave-convex fit with the triangle bracket 35.

Before sawtooth cutting of the metal sheet 4, it is necessary to manually connect the two cutting heads 361 and install them one by one on the triangular bracket 35 to form a whole for the subsequent cutting of the metal sheet 4. In this process, the two cutting heads 361 can be manually fitted together from the inclined section of the triangular bracket 35 at the same time. In this process, the cutting head 361 on the front side can be fitted with the inclined section of the front side of the triangular bracket 35 from top to bottom, and the cutting head 361 on the rear side can be fitted with the inclined section of the rear side of the triangular bracket 35 from bottom to top. The cutting head 361 on the front side moves from top to bottom toward the direction of the triangular bracket 35, and is plugged into and matched with the upper end of the alignment plate 364 and the alignment rod 363. The cutting head moves from bottom to top toward the direction of the triangular bracket 35, and is plugged into and matched with the lower end of the alignment plate 364 and the alignment rod 363 to further position the cutting heads 361 on the front and rear sides, while improving the stability of the connection between the cutting head 361 and the tip of the triangular bracket 35. In addition, the top contact parts of the front and rear cutting heads 361 are concave-convex matched, and the tail of the cutting head 361 and the triangular bracket 35 are also concave-convex matched, ensuring that the top and tail of the cutting head 361 can be accurately aligned and stably connected together, further increasing the tightness between the cutting heads 361 and the overall stability of the cutting knife assembly 36, so that the front and rear cutting heads 361 are in the same triangular shape as the triangular bracket 35, and the front and rear cutting heads 361 are in the same triangular shape as the triangular bracket 35. The tip of the cutter head 361 fits tightly. After the front and rear cutting cutter heads 361 are fitted with the triangular bracket 35, the cutting cutter head 361 is fixed by threading the No. 1 bolt and the inclined section of the Y-shaped bracket 362, and the threaded portion of the No. 1 bolt does not contact the cutting cutter head 361. Since the cutting cutter head 361 will generate a reverse impact that may damage the No. 1 bolt during the cutting of the metal sheet 4, the stability of the cutting cutter head 361 cannot be guaranteed after the thread of the No. 1 bolt is damaged. Through the cooperation of the Y-shaped bracket 362, the triangular bracket 35 and the No. 1 bolt, the No. 1 bolt can be protected while ensuring that the cutting cutter head 361 can be stably and tightly fitted with the triangular bracket 35; through the No. 1 bolt, the triangular bracket 35 and the Y-shaped bracket 3 The cooperation between 62 assembles the cutting heads 361 one by one, so that each cutting head 361 is in an independent installation state, which effectively increases the stability of the cutting head 361 when it cuts the metal plate 4 in the vertical reciprocating swing. In addition, the surface of the metal plate 4 may be uneven, which will cause uneven force when the integral head contacts the metal plate, thereby generating uneven recoil force. However, the cutting knife assembly 36 contacts the metal plate 4 through a separate cutting head 361, and each cutting head 362 can independently withstand the recoil force received during the cutting process, so that the recoil force received by the cutting knife assembly 36 is more evenly distributed to each cutting head 361, thereby extending the service life of the cutting head 361.

After one cutter assembly 36 is assembled, the remaining cutter assemblies 36 can be assembled one by one in the same manner. The assembled cutter assembly 36 is in a stable sawtooth shape as a whole. Then, the mounting plate 31, the triangular bracket 35 and the cutter assembly 36 can be moved as a whole to the lower end of the upper mold frame 32. Subsequently, the vertical rod and the rectangular plate 34 are passed through the through slot 33. The rectangular plate 34 is rotated so that it is perpendicular to the through slot 33. Through the cooperation between the rectangular plate 34 and the through slot, an upward pulling force is provided to the mounting plate 31 to firmly place the mounting plate 31 at the lower end of the upper mold frame 32. Then, the No. 2 bolt can be passed through the vertical plate 389 and threadedly connected to the upper mold frame 32 to fix the vertical rod and the mounting plate 31 as a whole to the lower end of the upper mold frame 32, so as to ensure that the subsequent cutter assembly 36 can be smoothly and effectively cut metal The metal plate 4 is cut in a serrated shape; in addition, damage is inevitable in the process of the cutting head 361 cutting the metal plate 4. The cutting head 361 is assembled in a detachable manner, which is different from the overall disassembly of the traditional integrated tool. The damaged cutting head 361 can be replaced and installed in a timely manner, which greatly improves the utilization rate and replacement efficiency of the cutting head 361 and saves the cost of cutting production. In addition, when the cutting knife assembly 36 is used and consumed to a certain extent, the mounting plate 31 and the cutting knife assembly 36 can be removed from the upper mold frame 32 as a whole by screwing the No. 2 bolt and rotating the rectangular plate 34, so as to replace the cutting knife assembly 36 as a whole, thereby increasing the replacement efficiency of the cutting knife assembly 36 and optimizing the cutting effect of the cutting head 361 on the metal plate 4.

Please refer to Figures 1, 2 and 4. The driving mechanism 2 includes a gantry 21 mounted on the upper end of the middle part of the workbench 1, a hydraulic cylinder 22 is installed at the lower end of the horizontal section of the gantry 21, and the lower end of the pushing end of the hydraulic cylinder 22 is fixedly connected to a connecting frame 23 installed between the left and right upper mold frames 32. The front and rear ends of the upper mold frame 32 are respectively slidably connected to guide columns 24 symmetrically installed on the upper end of the workbench 1. The guide columns 24 are externally sleeved with buffer springs 25 located between the upper mold frame 32 and the workbench 1. A rectangular through groove is opened at the upper end of the workbench 1, and a lower mold cavity 26 is symmetrically installed between the front and rear inner walls of the rectangular through groove. The sides of the left and right lower mold cavities 26 away from each other are both in a serrated shape complementary to the triangular bracket 35 and the cutter assembly 36, and a blanking assembly for blanking the cut metal sheet 4 is arranged in the rectangular through groove.

Please refer to Figures 3, 4, 6 and 8. The lower end of the upper mold frame 32 is provided with a pressing mechanism, which includes a pressing plate 1 321 arranged at the lower end of the upper mold frame 32. A connecting spring 322 evenly arranged from front to back is connected between the upper end surface of the pressing plate 1 321 and the lower end surface of the upper mold frame 32. The lower ends of the sides close to the left and right upper mold frames 32 are both installed with front-to-back symmetrical pressing rods 323. The lower ends of the pressing rods 323 are installed with raised sections. A pressing plate 2 324 is commonly provided below the front and rear pressing rods 323. The front and rear ends of the pressing plate 2 324 are respectively fixedly mounted. On the outside of the fixed column 325, an alignment groove 326 that is plugged into the raised section is opened at the upper end of the fixed column 325, and an upper cylindrical groove 327 that is slidably connected to the corresponding fixed column 325 is opened at the upper end of the workbench 1. A lower cylindrical groove 328 is arranged at the lower end of the upper cylindrical groove 327, and the diameter of the lower cylindrical groove 328 is larger than the diameter of the upper cylindrical groove 327. The fixed column 325 is slidably connected to the lower cylindrical groove 328 through a sliding circular plate at its lower end, and a tension spring 329 is connected between the bottom wall of the upper cylindrical groove 327 and the lower end surface of the pressure plate 2 324.

Please refer to Figures 1, 3, 4 and 7. The blanking assembly includes a support plate 371 for placing the metal sheet 4. The left and right sides of the left and right lower mold cavities 26 are respectively provided with support plates 371. The upper end of the support plate 371 is rotatably installed with rollers distributed in a matrix. The upper end of the support plate 371 close to the serrated side of the lower mold cavity 26 is provided with a pressure plate 372. The end of the support plate 371 close to the lower mold cavity 26 is rotatably installed between the front and rear inner walls of the rectangular through groove through a torsion spring shaft. An electric push rod 373 is installed at the lower end of the lower mold cavity 26. A push plate 374 is installed at the lower end of the pushing end of the electric push rod 373. Support plates 375 for supporting the support plate 371 are installed at the upper ends of the left and right sides of the push plate 374. A movable material receiving frame 376 is provided at the lower end of the workbench 1. The material receiving frame 376 is driven by an existing driving source. The upper end of the support plate 371 is provided with a fixing mechanism for limiting the metal sheet 4.

During the specific operation: first, the metal sheets 4 to be cut at both ends can be placed on the upper ends of the support plates 371 of the workbench 1 at the same time, and they can be respectively located under the left and right cutting mechanisms 3. Then, the connecting frame 23 can be pushed downward by the hydraulic cylinder 22, and the connecting frame 23 drives the left and right upper mold frames 32 and the mounting plate 31 at the lower ends thereof and the cutter assembly 36 to move downward synchronously as a whole until the cutter assembly 36 completes the cutting of the metal sheet 4. The metal sheet 4 becomes two sawtooth-shaped metal sheets 4 under the cooperation of the cutter assembly 36 and the lower mold cavity 26 (as shown in FIG. 12). After the cutting is completed, the connecting frame 23 and the left and right upper mold frames 3 are driven by the hydraulic cylinder 22. 2 is moved upward and reset as a whole to prepare for the subsequent cutting of the metal plate 4. During this process, the upper die frame 32 moves downward along the guide columns 24 at its front and rear ends. Before the cutter assembly 36 contacts the metal plate 4, the upper die frame 32 contacts and compresses the buffer spring 25, and guides the downward movement of the cutting mechanism 3 through the guide column 24. At the same time, the buffer spring 25 is used to protect the cutting mechanism 3 from excessive impact, thereby preventing the excessive impact from causing impact damage to the cutting head 361 or the cutting head 361. In addition, the double-station is used to simultaneously perform vertical cutting on two metal plates 4, which greatly improves the production and cutting efficiency of the sawtooth metal plates 4.

When the cutting mechanism 3 shears the metal sheet 4, the pressing plate 1 321 moves downward synchronously with the upper mold frame 32 through the connecting spring 322, and the pressing plate 1 321 first contacts the metal sheet 4. Under the buffering action of the connecting spring 322, the pressing plate 1 321 gradually applies a clamping force to the metal sheet 4 as the upper mold frame 32 moves downward. While the cutting knife assembly 36 cuts the metal sheet 4, the pressing plate 1 321 presses the metal sheet 4 below it. In addition, the pressing rod 323 moves downward synchronously with the upper mold frame 32 and gradually contacts the fixed column 325 at its lower end. The raised section at the lower end of the pressing rod 323 gradually inserts into the alignment groove 326 at the upper end of the fixed column 325. After the pressing rod 323 contacts the fixed column 325, it continues to move downward with the upper mold frame 32. At this time, the fixed column 325 is subjected to the downward pressure and drives the pressing plate 2 324 to move downward synchronously along the upper cylindrical groove 327, and the sliding circular plate at the lower end of the fixed column 325 moves downward along the lower cylindrical groove 328. During the process, the tension spring 329 is gradually compressed under the action of the bottom wall of the upper cylindrical groove 327 and the second pressure plate 324. The second pressure plate 324 and the upper end of the fixed column 325 are always located above the metal plate 4 under the cooperation of the tension spring 329 and the bottom wall of the upper cylindrical groove 327. While the first pressure plate 321 presses the metal plate 4, the second pressure plate 324 simultaneously presses the metal plate 4 under the action of the fixed column 325 and the pressure rod 323. The metal plates 4 on both sides of the cutting position are simultaneously pressed by the first pressure plate 321 and the second pressure plate 324. In addition, by utilizing the cooperation between the alignment groove 326 on the fixed column 325 and the raised section of the pressure rod 323, the downward movement of the upper mold frame 32 can be pre-buffered and secondary guided while the second pressure plate 324 presses the metal plate 4, thereby further increasing the stability of the metal plate 4 during and after cutting, and effectively preventing the metal plate 4 from warping or deformation during the cutting process.

Please refer to Figures 4 and 5. The fixing mechanism includes an L-shaped baffle 381. The upper end of the support plate 371 on the side close to the lower mold cavity 26 is provided with a front-to-back symmetrical L-shaped baffle 381, the longitudinal section length of the L-shaped baffle 381 is longer than the transverse section length, and the upper end of the support plate 371 on the side away from the lower mold cavity 26 is provided with a front-to-back symmetrical transverse baffle 382. The side of the transverse baffle 382 away from the lower mold cavity 26 is slidably installed with a longitudinal baffle 383, and the side where the front and rear longitudinal baffles 383 are close to each other is symmetrically installed with inclined sections inclined outwards. The front and rear transverse baffles 382 are symmetrically provided with adjustment components for adjusting the positions of the transverse baffles 382 and the L-shaped baffles 381 on the side away from the front and rear L-shaped baffles 381, and the front and rear transverse baffles 382 are symmetrically provided with linkage components on the end away from the front and rear L-shaped baffles 381.

Please refer to Figures 3, 4 and 5. The adjustment assembly includes an adjustment block 384 installed on the upper end of the side away from the front and rear L-shaped baffles 381 and the front and rear cross baffles 382. The front and rear adjustment blocks 384 on the same side are set at the upper end of the horizontal section of the same inverted plate 385. The upper end of the workbench 1 is provided with left-right symmetrical sliding grooves 386. The vertical sections on the left and right sides of the inverted plate 385 are slidably connected with the corresponding sliding grooves 386. The horizontal section of the inverted plate 385 is provided with sockets evenly arranged from left to right. The corresponding adjustment blocks 384 are plugged into and matched with the sockets through plug rods 388. A connecting rod is installed in the middle of the side away from the front and rear inverted plates 385. A vertical plate 389 is installed on the upper end of the connecting rod. A two-way electric telescopic rod 390 is connected between the front and rear vertical plates 389. The two-way electric telescopic rod 390 is installed between the front and rear vertical sections of the gantry 21 through a support.

Please refer to Figures 2, 3 and 4. The linkage assembly includes a side rack 391, which is installed at the end away from the front and rear longitudinal baffles 383. The upper end of the side rack 391 is meshed with a side gear 392. The side gear 392 is fixedly sleeved on the outside of a circular sleeve. The inner ring wall of the fixed sleeve and the gear column 393 are splined. The left and right ends of the gear column 393 are rotatably connected to the vertical plate installed on the upper end surface of the workbench 1. A middle rack 394 is installed at the lower end of the side away from the front and rear vertical plates 389. Bottom through grooves for the sliding of the middle rack 394 are provided on the front and rear vertical sections of the gantry 21. A middle gear 395 meshing with the middle rack 394 is fixedly sleeved in the middle of the gear column 393.

When two metal sheets 4 are simultaneously fed from the feeding areas at both ends of the workbench 1 to the bottom of the cutting mechanism 3, the longitudinal section of the L-shaped baffle 381 will collide with the end of the metal sheet 4, and at this time, the inclined section of the longitudinal baffle 383 is away from the metal sheet 4, which will not interfere with the smooth feeding of the metal sheet 4. The feeding position of the metal sheet 4 is pre-limited by the cooperation between the longitudinal sections of the front and rear corresponding L-shaped baffles 381, so that the metal sheet 4 is just in the appropriate cutting position, and then the two-way electric extension The retracting rod 390 pushes the vertical plate 389 in the opposite direction synchronously, and the vertical plate 389 drives the inverted plate 385 on the front and rear sides to move synchronously along the sliding groove 386 through the connecting rod. The inverted plate 385 drives the corresponding L-shaped baffle 381 and the horizontal baffle 382 to move in the direction of the metal plate 4 through the adjusting block 384. At this time, the longitudinal baffle 383 does not move with the movement of the horizontal baffle 382 due to its sliding connection with the horizontal baffle 382, but in this process, the middle rack 394 moves synchronously with the vertical plate 389 to the metal plate 4. The middle gear 395 rotates along with the movement of the middle rack 394. At the same time, the middle gear 395 drives the side gears 392 on the left and right sides to rotate synchronously through the gear column 393. When the side gears 392 rotate, they drive the side racks 391 and the longitudinal baffle 383 to move synchronously along the transverse baffle 382 toward the direction of the metal sheet 4, so that the transverse baffle 382 and the longitudinal baffle 383 can move synchronously toward the direction of the metal sheet 4 until the transverse section of the L-shaped baffle 381 is aligned with the transverse baffle 382. 82 is pressed against the front and rear ends of the metal sheet 4. At this time, the longitudinal baffle 383 contacts the metal sheet 4 through the inclined section so that the longitudinal baffle 383 gradually limits and fixes the end of the metal sheet 4, so as to achieve the limitation of the end of the metal sheet 4 by the longitudinal baffle 383. Through the cooperation between the L-shaped baffle 381, the transverse baffle 382 and the longitudinal baffle 383, the metal sheet 4 is circumferentially fixed and limited, so that the metal sheet 4 is stably placed on the upper end of the workbench 1, thereby ensuring the stability of the metal sheet 4 in the subsequent cutting process.

Before the metal sheet 4 is loaded, the position of the fixing mechanism to fix the metal sheet 4 can be adjusted according to the size of the metal sheet 4. During this process, the insertion rod 388 can be first pulled out from the socket, and then the adjustment block 384 can be slid along the horizontal section of the inverted plate 385. The horizontal baffle 382 driven by the sliding block moves synchronously with the longitudinal baffle 383 as a whole or the L-shaped baffle 381. When the horizontal baffle 382, the longitudinal baffle 383 and the L-shaped baffle 381 reach a suitable limit position for the metal sheet 4, the adjustment block 384 can be fixed again by the cooperation of the insertion rod 388 and the socket. During this process, the side rack 391 moves synchronously with the longitudinal baffle 383. At this time, the side gear 392 The fixed sleeve slides synchronously along the gear column 393 to ensure that the side gear 392 can always mesh with the side rack 391; before the subsequent cutting of the serrated metal sheet 4, the corresponding vertical plate 389 can be synchronously pushed in the opposite direction by the two-way electric telescopic rod 390, and the vertical plate 389 drives the corresponding inverted L-shaped plate 385 and the inverted L-shaped baffle 381 and the horizontal baffle 382 to move synchronously away from the metal sheet 4 through the connecting rod. The longitudinal baffle 383 moves synchronously away from the metal sheet 4 with the cooperation of the side gear 392 and the side rack 391 along with the middle rack 394, so that the metal sheet 4 is in a free state, and it is convenient for the subsequent cutting of the metal sheet 4.

After a metal sheet 4 is cut to form two sections of sawtooth-shaped metal sheets 4, the two sawtooth-shaped metal sheets 4 are respectively located at the upper ends of the support plates 371 on the left and right sides of the lower die cavity 26. At this time, the push plate 374 can be pushed downward by the electric push rod 373 to drive the support plate 375 to move downward synchronously. During the downward movement of the support plate 375, the support plate 371 loses the support of the support plate 375 at the same time and gradually rotates downward under the action of the torsion spring shaft. When the support plate 375 moves down to a suitable position, the support plate 371 is in a downward tilted state. The sawtooth metal sheet 4 at the upper end of the support plate 371 slides smoothly downward along the tilted support plate 371 under the action of the tilted support plate 371 and the roller, and gradually slides into the receiving frame 376 at the lower end of the workbench 1. Through the cooperation between the support plate 375, the support plate 371 and the torsion spring shaft, the sawtooth metal sheet 4 cut on the double station synchronously enters the receiving frame 376 along the tilted support plate 371, which greatly improves the unloading efficiency and saves time and money. The force is used, and there is no need to manually collect the cut serrated metal sheets 4 one by one. After a certain number of serrated metal sheets 4 are collected in the collecting frame 376, the collecting frame 376 can be driven by the existing driving source to move to a suitable storage position. In the process of the edge pressing mechanism pressing the metal sheet 4, the pressure plate 372 and the pressure plate 321 cooperate to provide a stable cutting platform for the metal sheet 4. After the rectangular metal sheet 4 is unloaded, the push plate 374 and the support plate 375 can be driven by the electric push rod 373 to move upward and reset. At the same time, the support plate 375 pushes the support plate 371 to rotate upward and reset synchronously, so as to place the subsequent metal sheet 4. It should be noted that since the length of the support plate 371 near the end of the workbench 1 is longer than that of the support plate 371 located in the middle of the workbench 1, the distances between the support plates 375 on the left and right sides and the electric push rod 373 are different, so that the support plate 375 can provide the same stable and strong support to the support plate 371.

Please refer to FIG. 1 . A feeding mechanism is arranged at the front side of the workbench 1. The feeding mechanism includes a left-right symmetrical feeding device 111. The feeding device 111 is slidably arranged at the upper end of the bottom plate. The front end of the left feeding device 111 and the rear end of the right feeding device 111 are both equipped with a horizontal rack 113. The same driving gear 114 is meshed between the front and rear horizontal racks 113. The driving gear 114 is rotatably arranged at the upper end of the bottom plate. It should be noted that the feeding device 111 is connected to an existing driving source, and is driven by the existing driving source to move left and right and perform feeding operations.

When the sawtooth metal sheet 4 is unloaded and the support plate 371 is reset, the loading devices 111 on the left and right sides are driven simultaneously by the existing driving source to push the metal sheet 4 to be cut from the loading areas on the left and right ends of the workbench 1 to the bottom of the cutting mechanism 3. When the existing driving source drives one loading device 111 to move along the bottom plate, the other loading device 111 moves toward each other synchronously with the cooperation of the horizontal rack 113 and the driving gear 114, and then the metal sheets 4 on the left and right sides are sent to the bottom of the corresponding cutting mechanism 3 synchronously. Through the cooperation of the driving gear 114 and the front and rear horizontal racks 113, the metal sheet 4 to be cut is quickly moved to the corresponding cutting area, which greatly improves the loading efficiency of the metal sheet 4, so that the metal sheets 4 on both sides can be vertically sheared synchronously, and the metal sheets 4 can be subjected to double-station synchronous vertical cutting and double-station synchronous loading and unloading in the same way.

In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

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, an integral connection, or a sliding connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection 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.

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 based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. Pendulum shear equipment with zigzag cutter, including workstation (1), its characterized in that: a driving mechanism (2) is arranged above the workbench (1), and cutting mechanisms (3) are symmetrically arranged at the left end and the right end of the driving mechanism (2);

The cutting mechanism (3) comprises a mounting plate (31), an upper die frame (32) is arranged at the upper end of the mounting plate (31), a through groove (33) is formed in the upper die frame (32), a vertical rod penetrating through the through groove (33) is arranged at the upper end of the mounting plate (31), a rectangular plate (34) is rotatably arranged at the upper end of the vertical rod, the mounting plate (31) is detachably connected with the upper die frame (32) through the cooperation among the vertical rod, the rectangular plate (34) and the through groove (33), a second bolt is arranged on one side, close to the left die frame (32), of the right die frame, and the second bolt penetrates through the vertical rod and is fixedly connected with the upper die frame (32) through threads;

The utility model discloses a cutting tool for the cutting tool comprises a mounting plate (31), a mounting plate (31) lower extreme is installed in the past and is evenly arranged and wholly be triangular support (35) of zigzag shape backward, be provided with cutter unit spare (36) on triangular support (35), cutter unit spare (36) are including two front and back symmetry and with cutting tool bit (361) of triangular support (35) slope section laminating, be provided with between the front and back slope section of triangular support (35) with terminal surface fixed connection's Y type support (362) under mounting plate (31), one side that cutting tool bit (361) kept away from the inclined section of triangular support (35) is provided with a bolt, a bolt slides and runs through cutting tool bit (361) and inclined section threaded connection with Y type support (362) behind the inclined section of triangular support (35), the tip of triangular support (35) is provided with the piece of counterpointing that is used for with cutting tool bit (361) alignment.

2. A pendulum shear apparatus with serrated cutters as claimed in claim 1, wherein: the driving mechanism (2) comprises a portal frame (21) erected at the upper end of the middle of the workbench (1), a hydraulic cylinder (22) is installed at the lower end of the horizontal section of the portal frame (21), a connecting frame (23) arranged between the left and right upper die frames (32) is fixedly connected with the lower end of the pushing end of the hydraulic cylinder (22), the front and rear ends of the upper die frames (32) are respectively and symmetrically installed on guide posts (24) at the upper end of the workbench (1) in a sliding mode, buffer springs (25) arranged between the upper die frames (32) and the workbench (1) are sleeved outside the guide posts (24), rectangular through grooves are formed in the upper end of the workbench (1), lower die cavities (26) are symmetrically installed between the front and rear inner walls of the rectangular through grooves, one sides, far away from each other, of the left and right lower die cavities (26) are in saw tooth shapes complementary with a triangular bracket (35) and a cutter assembly (36), and a blanking assembly for blanking a cut metal plate (4) is arranged in the rectangular through grooves.

3. A pendulum shear apparatus with serrated cutters as claimed in claim 1, wherein: the lower ends of the upper die frames (32) are respectively provided with a blank holder mechanism, the blank holder mechanism comprises a first pressing plate (321) arranged at the lower ends of the upper die frames (32), connecting springs (322) which are uniformly distributed from front to back are connected between the upper end faces of the first pressing plate (321) and the lower end faces of the upper die frames (32), compression bars (323) which are symmetrical from front to back are respectively arranged at the lower ends of one sides of the left and right upper die frames (32) which are close to each other, the lower ends of the compression bars (323) are provided with protruding sections, a second pressing plate (324) is jointly arranged below the front and back compression bars (323), the front and back ends of the second pressing plate (324) are respectively fixedly sleeved outside the fixing columns (325), the alignment groove (326) which is in plug connection with the protruding section is formed in the upper end of the fixing column (325), the upper end of the workbench (1) is provided with an upper cylindrical groove (327) which is in sliding connection with the corresponding fixing column (325), the lower end of the upper cylindrical groove (327) is provided with a lower cylindrical groove (328), the diameter of the lower cylindrical groove (328) is larger than that of the upper cylindrical groove (327), the fixing column (325) is in sliding connection with the lower cylindrical groove (328) through a sliding circular plate at the lower end of the fixing column (325), and an extension spring (329) is connected between the bottom wall of the upper cylindrical groove (327) and the lower end surface of the pressing plate II (324).

4. A pendulum shear apparatus with serrated cutters as claimed in claim 2, wherein: the blanking subassembly is including being used for placing layer board (371) of sheet metal (4), the left and right sides of control lower die cavity (26) all is provided with layer board (371) respectively, layer board (371) upper end rotates and installs the gyro wheel that is the matrix and distribute, bearing plate (372) are installed to layer board (371) upper end that is close to lower die cavity (26) sawtooth shape one side, layer board (371) are all installed between the front and back inner wall of rectangle logical groove through torsional spring axle rotation near the one end of lower die cavity (26), electric putter (373) are installed to the lower extreme of lower die cavity (26), push pedal (374) are installed to the push end lower extreme of electric putter (373), backup pad (375) that are used for supporting layer board (371) are all installed to the left and right sides upper end of push pedal (374), workstation (1) lower extreme is provided with mobilizable receipts material frame (376), layer board (371) upper end is provided with and is used for carrying out spacing fixed establishment to sheet metal (4).

5. A pendulum shear apparatus with serrated cutters as set forth in claim 4, wherein: the fixing mechanism comprises an L-shaped baffle (381), the upper ends of supporting plates (371) on one side, close to the lower die cavity (26), of the lower die cavity (26) are respectively provided with an L-shaped baffle (381) which is symmetrical front and back, the length of a longitudinal section of each L-shaped baffle (381) is longer than that of a transverse section, the upper ends of the supporting plates (371) on one side, far away from the lower die cavity (26), of the lower die cavity (26) are respectively provided with a transverse baffle (382) which is symmetrical front and back, longitudinal baffles (383) are respectively installed in a sliding penetrating mode on one side, close to the longitudinal baffles (383), of each lower die cavity (382) in a sliding mode, inclined sections which incline outwards are symmetrically installed on one side, far away from the front and back transverse baffles (382) and the front and back L-shaped baffles (381), adjusting components for adjusting the positions of the transverse baffles (382) and the L-shaped baffles (381) are symmetrically arranged on one end, far away from the front and back transverse baffles (382).

6. A pendulum shear apparatus with serrated cutters as set forth in claim 5, wherein: the utility model provides an adjusting part, including installing L type baffle (381) around and around cross baffle (382) keep away from regulating block (384) of one side upper end mutually, around regulating block (384) of homonymy set up in the horizontal segment upper end of same back U template (385), sliding groove (386) of bilateral symmetry have been seted up to workstation (1) upper end, vertical section and the sliding groove (386) sliding connection who corresponds of back U template (385) left and right sides, the jack of evenly arranging from left and right has been seted up on the horizontal segment of back U template (385), one side mid-mounting connecting rod that the corresponding regulating block (384) was kept away from mutually through inserted bar (388) and jack grafting cooperation around, riser (389) are installed to the connecting rod upper end, be connected with two-way electric telescopic handle (390) between front and back riser (389), two-way electric telescopic handle (390) are installed between the front and back vertical section of portal frame (21) through the support.

7. A pendulum shear apparatus with serrated cutters as set forth in claim 6, wherein: the linkage assembly comprises a side rack (391), wherein the side rack (391) is arranged at one end of a front vertical baffle (383) and a rear vertical baffle (383) which are far away from each other, a side gear (392) is meshed with the upper end of the side rack (391), the side gear (392) is fixedly sleeved outside a circular sleeve, the inner annular wall of the fixed sleeve is matched with a gear column (393) through a spline, the left end and the right end of the gear column (393) are rotatably connected with a vertical plate arranged on the upper end face of a workbench (1), a middle rack (394) is arranged at the lower end of one side of the front vertical plate (389) which is far away from each other, a bottom through groove for the middle rack (394) to slide is formed in the front vertical section and the rear vertical section of a portal frame (21), and a middle gear (395) meshed with the middle rack (394) is fixedly sleeved in the middle of the gear column (393).

8. A pendulum shear apparatus with serrated cutters as claimed in claim 1, wherein: the front side of the workbench (1) is provided with a feeding mechanism, the feeding mechanism comprises feeding equipment (111) which is bilaterally symmetrical, the feeding equipment (111) is slidably arranged at the upper end of the bottom plate, the front end of the left feeding equipment (111) and the rear end of the right feeding equipment (111) are respectively provided with a horizontal rack (113), the front horizontal rack (113) and the rear horizontal rack (113) are meshed with one driving gear (114), and the driving gear (114) is rotatably arranged at the upper end of the bottom plate.

9. A pendulum shear apparatus with serrated cutters as claimed in claim 1, wherein: the alignment part comprises an alignment rod (363) penetrating through the tip of the triangular bracket (35), the alignment rod (363) is fixedly connected with the triangular bracket (35), and alignment plates (364) which are in splicing fit with the upper end and the lower end of the alignment rod (363) are respectively arranged on one side, close to the inclined section of the triangular bracket (35), of the front and rear cutting heads (361) on the same triangular bracket (35).

10. A pendulum shear apparatus with serrated cutters as claimed in claim 1, wherein: the front and rear cutting heads (361) on the same triangular bracket (35) are in concave-convex fit on the side close to each other, and one end, far away from the tip part of the triangular bracket (35), of the cutting head (361) is in concave-convex fit with the triangular bracket (35) in the same way.