Double-end angle iron hydraulic combined punching and shearing machine

Abstract

The invention belongs to the technical field of double-end angle iron machining equipment, and discloses a double-end angle iron hydraulic combined punching and shearing machine which comprises a base, and a fixing frame is fixedly mounted at the top of the base. Through the arrangement of the restraint frame, the movable block, the vertical rod, the fixed block and the first spring, due to the appearance design of the restraint frame, the suspended to-be-sheared end of the double-end angle iron can be limited, so that the suspended part of the double-end angle iron does not incline or deform when the double-end angle iron is sheared by the bottom end of the punching shear head body; when the punching shear head body moves downwards, the bottom end of a fixed block is attached to the interior of the double-end angle iron, finally, the whole punching shear head body continues to move downwards, the fixed block drives a movable block to move upwards in a first vertical pipe through a vertical rod, and at the moment, a first spring is in a compressed state; and therefore, the fixed block firmly extrudes and fixes the cut part of the double-end angle iron by utilizing the elastic force of the first spring.

Description

Technical Field

[0001] The invention belongs to the technical field of double-head angle iron processing equipment, in particular to a double-head angle iron hydraulic combined punching and shearing machine. Background Art

[0002] Hydraulic combination punching and shearing machine is a sheet metal and profile processing equipment that integrates multiple functions. It is widely used in the production of civil facilities such as steel structure processing, storage shelves, high-voltage power towers, telecommunication towers, street lights, advertising signs, elevators and ventilation ducts.

[0003] At present, when processing double-headed angle irons, enterprises often use corresponding hydraulic combination punching and shearing machines. In actual use, the existing hydraulic combination punching and shearing machines generally place the part of the double-headed angle iron to be cut in the air outside the support frame, and then use the punching and shearing head to cut the suspended double-headed angle iron part. However, when the punching and shearing head is cutting the double-headed angle iron, since the double-headed angle iron in the suspended part is not subject to certain constraints, the outer surface of the punching and shearing head will form a certain extrusion on the part of the double-headed angle iron to be cut, causing a certain degree of deformation in the cut part of the double-headed angle iron. At this time, it is easy to cause part of the cut double-headed angle iron to be slightly deformed and unable to recover, thereby affecting the punching and shearing quality of the double-headed angle iron.

[0004] In addition, the punching and shearing heads of the existing hydraulic combination punching and shearing machines generally move up and down on the limit frame to ensure the stability of the up and down movement of the punching and shearing heads. However, in order to ensure the smoothness of the operation, the operator is required to manually add lubricating oil between the mold and the punching and shearing heads frequently. This method brings inconvenience to the operator's long-term operation and is prone to being forgotten for a period of time, so it needs to be improved. Summary of the invention

[0005] The purpose of the present invention is to provide a double-head angle iron hydraulic combined punching and shearing machine to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical scheme: a double-head angle iron hydraulic combined punching and shearing machine, comprising a base, a fixing frame is fixedly installed on the top of the base, a hydraulic cylinder is fixedly installed on the middle part of the top of the fixing frame, the bottom end of the hydraulic cylinder passes through the fixing frame and extends to the inside of the fixing frame and is fixedly installed with a connecting plate, a punching and shearing head body is fixedly installed on the rear side of the bottom of the connecting plate, the bottoms of both sides of the punching and shearing head body are movably connected to the limiting frames, the bottom ends of the limiting frames are fixedly connected to the top of the base, the number of the limiting frames is two, the front sides of the two limiting frames are fixedly installed with connecting frames, the number of the connecting frames is two, and the two The top of the connecting frame is fixedly installed with a constraint frame, the bottom of the front of the punching and shearing head body is fixedly installed with a fixing plate, the top of the fixing plate is fixedly installed with a first vertical tube, the inner part of the first vertical tube is movably sleeved with a movable block, the bottom end of the movable block is fixedly installed with a vertical rod, the bottom end of the vertical rod sequentially penetrates the first vertical tube and the fixing plate and extends to the bottom of the fixing plate and is fixedly installed with a fixing block, the outer surface of the vertical rod is movably sleeved with a first spring, the top of the first spring is fixedly connected to the bottom of the fixing plate, the bottom end of the first spring is fixedly connected to the top of the fixing block, and the top of the base is fixedly installed with a support frame body located between the limit frames.

[0007] Preferably, a fixed shell is fixedly installed on the top of the back side of the punching and shearing head body, and an oil storage cavity is opened inside the top end of the limiting frame.

[0008] Preferably, coating sponges are fixedly installed inside the top ends of opposite sides of the two limiting frames, and the outer surfaces of the coating sponges are movably connected to the outer surface of the punching and shearing head body.

[0009] Preferably, the internal movable sleeve of the limit frame is connected with a rotating rod located between the oil storage chamber and the coating sponge, the front end of the rotating rod passes through the limit frame and extends to the inside of the front side of the limit frame, the rear end of the rotating rod passes through the limit frame and extends to the back side of the limit frame and is fixedly sleeved with a gear, and the top of the limit frame is fixedly installed with a refueling pipe located directly above the oil storage chamber, and the internal thread of the refueling pipe is sleeved with a sealing sleeve.

[0010] Preferably, a rotating wheel located inside the limiting frame is fixedly sleeved on the outer surface of the rotating rod, and an oil groove is provided on the outer surface of the rotating wheel.

[0011] Preferably, a mounting shell is fixedly installed in the middle of the top end of the back side of the limit frame, a moving block is movably sleeved inside the mounting shell, a connecting rod is fixedly installed at the bottom of the moving block, the bottom end of the connecting rod passes through the mounting shell and extends to the bottom of the mounting shell and is fixedly installed with a toothed plate, and the outer surface of the toothed plate is meshedly connected with the outer surface of the gear.

[0012] Preferably, a second spring is movably sleeved on the outer surface of the connecting rod, the top end of the second spring is fixedly connected to the bottom of the mounting shell, and the bottom end of the second spring is fixedly connected to the top of the toothed plate.

[0013] Preferably, a limiting block is movably sleeved inside the tooth plate, and the back side of the limiting block is fixedly connected to the outer side of the limiting frame.

[0014] Preferably, a second vertical pipe is fixedly installed on the top of the mounting shell, a metal hose is fixedly connected to the top of the second vertical pipe, and the other end of the metal hose is fixedly connected to the outer side of the fixed shell.

[0015] Preferably, a fixing pipe is fixedly sleeved on the top of the first vertical pipe, and the top end of the fixing pipe sequentially penetrates the punching and shearing head body and the fixing shell and extends to the inside of the back side of the fixing shell.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The present invention sets a constraint frame, a movable block, a vertical rod, a fixed block and a first spring. Due to the shape design of the constraint frame, the suspended end of the double-headed angle iron to be sheared can be restricted, so that when the double-headed angle iron is sheared by the bottom end of the punching and shearing head body, the suspended part will not be tilted and deformed. When the punching and shearing head body moves downward, the bottom end of the fixed block will fit with the inside of the double-headed angle iron. Finally, as the punching and shearing head body continues to move downward as a whole, the fixed block will drive the movable block to move upward inside the first vertical tube through the vertical rod, and at this time the first spring will be in a compressed state, so that the elastic force of the first spring can be used to make the fixed block firmly squeeze and fix the cut part of the double-headed angle iron, thereby ensuring the subsequent shearing quality of the double-headed angle iron.

[0018] 2. The present invention provides a coating sponge, a rotating wheel, an oil tank, a gear and a tooth plate. When the movable block moves upward inside the first vertical pipe, the high-pressure gas inside the first vertical pipe will enter the interior of the fixed shell through the fixed pipe, and then enter the interior of the mounting shell through the metal hose and the second vertical pipe in turn, thereby squeezing and pushing the movable block, the connecting rod and the tooth plate to move downward. At this time, the second spring is in a stretched state, and the outer surface of the tooth plate meshes with the outer surface of the gear, thereby driving the rotating rod and the rotating wheel to rotate. At this time, the lubricating oil inside the oil storage chamber is rotated inside the oil tank, and will eventually spill onto the coating sponge and be absorbed by the coating sponge. When the punching and shearing head body moves up and down, it will contact the outer surface of the coating sponge, thereby achieving an automatic lubrication effect on the punching and shearing head body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the front side of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the back side of the present invention;

[0021] Figure 3 It is a schematic cross-sectional structural diagram of the side of the present invention;

[0022] Figure 4 It is a schematic cross-sectional structural diagram of the limiting frame of the present invention;

[0023] Figure 5 It is a schematic cross-sectional structural diagram of the fixed shell of the present invention;

[0024] Figure 6 It is a schematic cross-sectional structural diagram of the installation shell of the present invention;

[0025] Figure 7 for Figure 4 A schematic diagram of the local enlarged structure at point A in the middle;

[0026] Figure 8 for Figure 4 A schematic diagram of the local enlarged structure at B in the middle;

[0027] Fig. 9 for Figure 6 Schematic diagram of the local enlarged structure at point C in the middle.

[0028] In the figure: 1. base; 2. fixed frame; 3. hydraulic cylinder; 4. connecting plate; 5. punching and shearing head body; 6. limit frame; 7. connecting frame; 8. restraining frame; 9. fixed plate; 10. first vertical pipe; 11. movable block; 12. vertical rod; 13. fixed block; 14. first spring; 15. support frame body; 16. fixed shell; 17. oil storage chamber; 18. coating sponge; 19. rotating wheel; 20. oil tank; 21. gear; 22. mounting shell; 23. moving block; 24. connecting rod; 25. tooth plate; 26. second spring; 27. limit block; 28. second vertical pipe; 29. ​​metal hose; 30. fixed pipe; 31. refueling pipe; 32. sealing sleeve; 33. rotating rod. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 9As shown, the embodiment of the present invention provides a double-head angle iron hydraulic combined punching and shearing machine, including a base 1, a fixing frame 2 is fixedly installed on the top of the base 1, a hydraulic cylinder 3 is fixedly installed in the middle of the top of the fixing frame 2, the bottom end of the hydraulic cylinder 3 passes through the fixing frame 2 and extends to the inside of the fixing frame 2 and is fixedly installed with a connecting plate 4, a punching and shearing head body 5 is fixedly installed on the rear side of the bottom of the connecting plate 4, the bottoms of both sides of the punching and shearing head body 5 are movably connected to the limiting frames 6, the bottom ends of the limiting frames 6 are fixedly connected to the top of the base 1, the number of the limiting frames 6 is two, the front sides of the two limiting frames 6 are fixedly installed with connecting frames 7, the number of the connecting frames 7 is two, and the tops of the two connecting frames 7 are fixedly installed with A restraining frame 8 and a fixing plate 9 are fixedly installed at the bottom of the front side of the punching and shearing head body 5, a first vertical tube 10 is fixedly installed on the top of the fixing plate 9, a movable block 11 is movably sleeved inside the first vertical tube 10, a vertical rod 12 is fixedly installed at the bottom end of the movable block 11, the bottom end of the vertical rod 12 passes through the first vertical tube 10 and the fixing plate 9 in sequence and extends to the bottom of the fixing plate 9 and is fixedly installed with a fixing block 13, a first spring 14 is movably sleeved on the outer surface of the vertical rod 12, the top end of the first spring 14 is fixedly connected to the bottom of the fixing plate 9, the bottom end of the first spring 14 is fixedly connected to the top of the fixing block 13, and a support frame body 15 located between the limit frames 6 is fixedly installed on the top of the base 1.

[0031] The operator first inserts the double-headed angle steel to be punched and sheared from the top of the support frame body 15 into the interior of the constraint frame 8, and due to the operation of the hydraulic cylinder 3, the connecting plate 4 will drive the punching and shearing head body 5 to move downward as a whole, and finally the lower surface of the fixed block 13 will contact the inner surface of the double-headed angle steel, and as the punching and shearing head body 5 continues to move downward as a whole, the fixed block 13 will drive the movable block 11 to move upward inside the first vertical tube 10 through the vertical rod 12, and at this time the first spring 14 is in a compressed state, and at this time the outer surface of the bottom end of the fixed block 13 will squeeze and fix the punched and sheared part of the double-headed angle steel, and finally the outer surface of the bottom end of the punching and shearing head body 5 will cut off the double-headed angle steel, and in this process, due to the restriction of the punching and shearing part of the double-headed angle steel by the inner surface of the constraint frame 8, the cut part of the double-headed angle steel will not be deformed by the downward punching and shearing extrusion force from the punching and shearing head body 5, so that the appearance of the double-headed angle steel after punching and shearing will not change, so that the punching and shearing quality of the double-headed angle steel is guaranteed.

[0032] A fixed shell 16 is fixedly installed on the top of the back side of the punching and shearing head body 5 , and an oil storage cavity 17 is opened inside the top of the limiting frame 6 .

[0033] The oil storage chamber 17 contains lubricating oil to lubricate the subsequent up and down movement of the punching and shearing head body 5 .

[0034] The coating sponges 18 are fixedly installed inside the top ends of the opposite sides of the two limiting frames 6 , and the outer surfaces of the coating sponges 18 are movably connected to the outer surface of the punching and shearing head body 5 .

[0035] When the punching and shearing head body 5 moves up and down, the outer surface of the punching and shearing head body 5 will contact the outer surface of the coating sponge 18. At this time, the lubricating oil absorbed by the two coating sponges 18 will lubricate both sides of the punching and shearing head body 5, so that the punching and shearing head body 5 can move more smoothly and there is no need for the operator to frequently lubricate and maintain the punching and shearing head body 5 on a regular basis.

[0036] Among them, the internal movable sleeve of the limit frame 6 is connected with a rotating rod 33 located between the oil storage chamber 17 and the coating sponge 18, the front end of the rotating rod 33 passes through the limit frame 6 and extends to the inside of the front side of the limit frame 6, the rear end of the rotating rod 33 passes through the limit frame 6 and extends to the back side of the limit frame 6 and is fixedly sleeved with a gear 21, and the top of the limit frame 6 is fixedly installed with a refueling pipe 31 located directly above the oil storage chamber 17, and the internal thread of the refueling pipe 31 is sleeved with a sealing sleeve 32.

[0037] When the gear 21 rotates, the rotating rod 33 can rotate as a whole, and the operator can rotate the sealing sleeve 32 upward to release the seal of the filling pipe 31, and then add lubricating oil to the inside of the oil storage chamber 17 through the filling pipe 31.

[0038] The outer surface of the rotating rod 33 is fixedly sleeved with a rotating wheel 19 located inside the limiting frame 6 , and the outer surface of the rotating wheel 19 is provided with an oil groove 20 .

[0039] The lubricating oil inside the oil storage chamber 17 will enter the oil tank 20. When the rotating rod 33 drives the rotating wheel 19 and the oil tank 20 to rotate, the lubricating oil inside the oil tank 20 will be sprinkled into the coating sponge 18 and then absorbed by the coating sponge 18, so that the subsequent coating sponge 18 can automatically lubricate the shear head body 5 when it moves up and down.

[0040] Among them, a mounting shell 22 is fixedly installed in the middle of the top of the back side of the limiting frame 6, and a moving block 23 is movably sleeved inside the mounting shell 22. A connecting rod 24 is fixedly installed at the bottom of the moving block 23. The bottom end of the connecting rod 24 passes through the mounting shell 22 and extends to the bottom of the mounting shell 22 and is fixedly installed with a tooth plate 25. The outer surface of the tooth plate 25 is meshed and connected with the outer surface of the gear 21.

[0041] When the tooth plate 25 moves up and down, the outer surface of the tooth plate 25 will mesh with the outer surface of the gear 21, so that the gear 21 can drive the rotating rod 33 to rotate.

[0042] The outer surface of the connecting rod 24 is movably sleeved with a second spring 26 , the top end of the second spring 26 is fixedly connected to the bottom of the mounting shell 22 , and the bottom end of the second spring 26 is fixedly connected to the top of the toothed plate 25 .

[0043] Due to the design of the second spring 26 , the tooth plate 25 has a good resetting effect.

[0044] The tooth plate 25 is internally movably sleeved with a limiting block 27 , and the back side of the limiting block 27 is fixedly connected to the outer side of the limiting frame 6 .

[0045] Due to the design of the limiting block 27, a good limiting effect can be achieved on the up and down movement of the tooth plate 25, making its movement more stable.

[0046] A second vertical pipe 28 is fixedly installed on the top of the installation shell 22 , a metal hose 29 is fixedly connected to the top of the second vertical pipe 28 , and the other end of the metal hose 29 is fixedly connected to the outer side of the fixed shell 16 .

[0047] Due to the design of the metal hose 29 , the high-pressure gas entering into the interior of the fixed shell 16 can be introduced into the interior of the mounting shell 22 through the metal hose 29 and the second vertical pipe 28 , thereby pushing the moving block 23 to move downward as a whole.

[0048] The top of the first vertical pipe 10 is fixedly sleeved with a fixing pipe 30 , and the top end of the fixing pipe 30 passes through the punching and shearing head body 5 and the fixing shell 16 in sequence and extends to the inside of the back side of the fixing shell 16 .

[0049] The high-pressure gas in the first vertical pipe 10 will enter into the fixed shell 16 through the fixed pipe 30 .

[0050] Working principle and usage process:

[0051] First, the operator places the double-headed angle iron to be processed on the upper surface of the support frame body 15 and then inserts it into the interior of the constraint frame 8, and then starts the hydraulic cylinder 3. The operation of the hydraulic cylinder 3 will cause the connecting plate 4 to drive the punching and shearing head body 5 to move downward. During this process, the outer surface of the bottom end of the fixed block 13 will first fit in contact with the part of the double-headed angle iron to be cut, and as the punching and shearing head body 5 continues to move downward, the fixed block 13 will drive the movable block 11 to move upward inside the first vertical tube 10 through the vertical rod 12. At this time, the first spring 14 is compressed, and due to the reaction force of the first spring 14, the fixed block 13 will firmly fix the cut part of the double-headed angle iron. Finally, the bottom end of the punching and shearing head body 5 will contact the double-headed angle iron to punch and shear the double-headed angle iron.

[0052] When the movable block 11 moves upward inside the first vertical tube 10, the movable block 11 will push the high-pressure gas inside the first vertical tube 10 into the fixed shell 16 through the fixed tube 30. At this time, the high-pressure gas inside the fixed shell 16 enters the interior of the mounting shell 22 through the metal hose 29 and the second vertical tube 28 in turn, thereby pushing the movable block 23 inside the mounting shell 22 to move downward. At this time, the connecting rod 24 will drive the tooth plate 25 to move downward together, and the second spring 26 is in a stretched state. Since the outer surface of the tooth plate 25 is meshed with the outer surface of the gear 21, the rotating rod 33 and the rotating wheel 19 can be driven to rotate. At this time, the oil groove 20 inside the oil storage chamber 17 will be filled with lubricating oil, and as the rotating rod 33 drives the rotating wheel 19 to rotate, the lubricating oil inside the oil groove 20 will eventually be sprinkled onto the coating sponge 18 and absorbed by the coating sponge 18. At this time, when the punching and shearing head body 5 moves back and forth up and down, the two coating sponges 18 can automatically lubricate the two sides of the punching and shearing head body 5.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-head angle iron hydraulic combined punching and shearing machine, comprising a base (1), characterized in that: A fixing frame (2) is fixedly installed on the top of the base (1), a hydraulic cylinder (3) is fixedly installed in the middle of the top of the fixing frame (2), the bottom end of the hydraulic cylinder (3) passes through the fixing frame (2) and extends to the inside of the fixing frame (2) and is fixedly installed with a connecting plate (4), a punching head body (5) is fixedly installed on the rear side of the bottom of the connecting plate (4), the bottoms of both sides of the punching head body (5) are movably connected to limiting frames (6), the bottom ends of the limiting frames (6) are fixedly connected to the top of the base (1), the number of the limiting frames (6) is two, the front sides of the two limiting frames (6) are fixedly installed with connecting frames (7), the number of the connecting frames (7) is two, the top ends of the two connecting frames (7) are fixedly installed with restraining frames (8), the front sides of the punching head body (5) are fixedly connected to the fixing frame (2), the top ends of the two connecting frames (7) are fixedly connected to the fixing frame (2), the top ends of the two connecting frames (7) are fixedly connected to the fixing frame (3), the front sides of the punching head body (5) are fixedly connected to the fixing frame (3), the fixing frame (3) is ... A fixing plate (9) is fixedly installed at the bottom of the fixing plate (9), a first vertical tube (10) is fixedly installed at the top of the fixing plate (9), a movable block (11) is movably sleeved inside the first vertical tube (10), a vertical rod (12) is fixedly installed at the bottom end of the movable block (11), the bottom end of the vertical rod (12) passes through the first vertical tube (10) and the fixing plate (9) in sequence and extends to the bottom of the fixing plate (9) and is fixedly installed with a fixing block (13), a first spring (14) is movably sleeved on the outer surface of the vertical rod (12), the top end of the first spring (14) is fixedly connected to the bottom of the fixing plate (9), the bottom end of the first spring (14) is fixedly connected to the top of the fixing block (13), and a support frame body (15) located between the limiting frames (6) is fixedly installed at the top of the base (1).

2. A double-head angle iron hydraulic combined punching and shearing machine according to claim 1, characterized in that: A fixed shell (16) is fixedly mounted on the top of the back side of the punching and shearing head body (5), and an oil storage chamber (17) is provided inside the top end of the limiting frame (6).

3. The double-head angle iron hydraulic combined punching and shearing machine according to claim 1, characterized in that: A coating sponge (18) is fixedly installed inside the top of the opposite side of the two limiting frames (6), and the outer surface of the coating sponge (18) is movably connected to the outer surface of the punching and shearing head body (5).

4. The double-head angle iron hydraulic combined punching and shearing machine according to claim 1, characterized in that: The limit frame (6) is internally movably sleeved with a rotating rod (33) located between the oil storage chamber (17) and the coating sponge (18); the front end of the rotating rod (33) penetrates the limit frame (6) and extends to the inside of the front face of the limit frame (6); the rear end of the rotating rod (33) penetrates the limit frame (6) and extends to the back face of the limit frame (6) and is fixedly sleeved with a gear (21); a refueling pipe (31) located directly above the oil storage chamber (17) is fixedly installed on the top of the limit frame (6); the internal thread of the refueling pipe (31) is sleeved with a sealing sleeve (32).

5. The double-head angle iron hydraulic combined punching and shearing machine according to claim 4, characterized in that: A rotating wheel (19) located inside the limiting frame (6) is fixedly sleeved on the outer surface of the rotating rod (33), and an oil groove (20) is provided on the outer surface of the rotating wheel (19).

6. The double-head angle iron hydraulic combined punching and shearing machine according to claim 1, characterized in that: A mounting shell (22) is fixedly mounted in the middle of the top of the back side of the limiting frame (6); a moving block (23) is movably sleeved inside the mounting shell (22); a connecting rod (24) is fixedly mounted at the bottom of the moving block (23); the bottom end of the connecting rod (24) passes through the mounting shell (22) and extends to the bottom of the mounting shell (22) and is fixedly mounted with a toothed plate (25); the outer surface of the toothed plate (25) is meshedly connected with the outer surface of the gear (21).

7. The double-head angle iron hydraulic combined punching and shearing machine according to claim 6, characterized in that: A second spring (26) is movably sleeved on the outer surface of the connecting rod (24), the top end of the second spring (26) is fixedly connected to the bottom of the mounting shell (22), and the bottom end of the second spring (26) is fixedly connected to the top of the toothed plate (25).

8. The double-head angle iron hydraulic combined punching and shearing machine according to claim 6, characterized in that: The tooth plate (25) is internally movably sleeved with a limit block (27), and the back side of the limit block (27) is fixedly connected to the outer side of the limit frame (6).

9. The double-head angle iron hydraulic combined punching and shearing machine according to claim 6, characterized in that: A second vertical pipe (28) is fixedly mounted on the top of the mounting shell (22), a metal hose (29) is fixedly connected to the top of the second vertical pipe (28), and the other end of the metal hose (29) is fixedly connected to the outer side of the fixed shell (16).

10. The double-head angle iron hydraulic combined punching and shearing machine according to claim 1, characterized in that: A fixing tube (30) is fixedly sleeved on the top of the first vertical tube (10), and the top end of the fixing tube (30) passes through the punching and shearing head body (5) and the fixing shell (16) in sequence and extends to the inside of the back side of the fixing shell (16).

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