Shearing machine

Abstract

The invention relates to a shearing machine, and belongs to the field of shearing machines, the shearing machine comprises a fixed cutter holder, a movable cutter holder, a material pressing seat, an upper beam, a lower beam and two side beams, the two side beams are distributed front and back, the upper beam and the lower beam are distributed between the two side beams at intervals up and down, the upper beam and the lower beam are fixedly connected with the two side beams, the fixed cutter holder is fixedly arranged on the lower beam, and the material pressing seat is fixedly arranged on the fixed cutter holder. The fixed tool apron is located between the upper beam and the lower beam, a fixed tool body is installed on the fixed tool apron, the movable tool apron and the material pressing base are distributed between the fixed tool apron and the upper beam in a left-right mode, a movable tool body is installed on the movable tool apron, the movable tool apron is driven to ascend and descend through a shearing oil cylinder, and the material pressing base is driven to ascend and descend through a material pressing oil cylinder. A purification mechanism is arranged on the movable tool apron and located between the fixed tool apron and the upper beam; according to the air purifier, dust-containing air is sucked in and dust is intercepted, air purification is achieved, in the purification process, cleaning of the filter screen can be achieved, the filter screen is prevented from being blocked, and the service life of the filter screen is prolonged.

Description

Technical Field

[0001] The invention relates to a shearing machine and belongs to the field of shearing machines. Background Art

[0002] Shearing machines are suitable for metal recycling plants, scrap car dismantling yards, smelting and casting industries. They can perform cold shearing and flanging of various shapes of steel and various metal materials, as well as press forming of powder products, plastics, fiberglass, insulation materials, and rubber. The most commonly used metal shearing machines are crocodile shears and gantry shears.

[0003] The Chinese utility model patent with announcement number CN220196488U discloses a gantry shearing machine, comprising a shearing mechanism and a feeding mechanism arranged on the left and right; the shearing mechanism comprises a frame, a movable knife seat and a fixed knife seat are arranged on the frame, the movable knife seat and the fixed knife seat are arranged alternately up and down, the movable knife seat is located on the side of the fixed knife seat away from the shearing mechanism, the movable knife seat is driven to rise and fall by a shearing cylinder, and the fixed knife seat is fixedly connected to the frame; the bottom of the movable knife seat is an inclined surface inclined front and back, a movable knife mounting groove is arranged on the right side of the bottom of the movable knife seat, a movable knife is mounted in the movable knife mounting groove, the bottom of the movable knife is in the same plane as the bottom of the movable knife seat, the two ends of the movable knife are arranged front and back, and the downward projection of the movable knife is wavy; the gantry shearing machine sets the movable knife at an angle, and when the movable knife performs the shearing action, the contact area between the movable knife and the material is reduced, and the pressure per unit volume of the material is increased, thereby improving the shearing capacity. However, in the prior art, when the shearing action is performed, there is dust on the surface of the incoming shearing material. During the shearing process, the dust is easy to float in the air, affecting the air quality of the shearing environment.

[0004] Therefore, there is a need for a shearing machine that can purify the air during the shearing process. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in order to overcome the deficiencies of the prior art, a shearing machine is provided to achieve air purification during the shearing process.

[0006] The technical solution adopted by the present invention to solve the above problems is: a shearing machine, comprising a fixed knife seat, a movable knife seat, a material pressing seat, an upper beam, a lower beam and two side beams, the two side beams are distributed front and back, the upper beam and the lower beam are distributed between the two side beams at intervals, the upper beam and the lower beam are fixedly connected to the two side beams, the fixed knife seat is fixedly arranged on the lower beam, the fixed knife seat is located between the upper beam and the lower beam, a fixed knife body is installed on the fixed knife seat, the movable knife seat and the material pressing seat are distributed left and right between the fixed knife seat and the upper beam, a movable knife body is installed on the movable knife seat, the movable knife seat is driven to rise and fall by a shearing cylinder, the material pressing seat is driven to rise and fall by a material pressing cylinder, a purification mechanism is arranged on the movable knife seat, and the purification mechanism is located between the fixed knife seat and the upper beam;

[0007] The purification mechanism comprises a purification box, which is fixedly arranged on the left side of the movable knife seat, a plurality of air holes are arranged at the bottom of the purification box, an air outlet pipe is vertically fixedly penetrated through the top of the purification box, the outer end of the air outlet pipe is connected to the air suction device, a mounting ring is coaxially arranged in the air outlet pipe, a filter is installed in the ring hole of the mounting ring, and the outer wall of the mounting ring is sealed and connected with the inner wall of the air outlet pipe;

[0008] The purification mechanism also includes a fixed block, a discharge pipe and a collecting hood, the fixed block is located in the purification box, the top of the fixed block is penetrated by a through hole, the bottom end of the air outlet pipe is inserted into the through hole, the bottom end of the air outlet pipe is sealed and fixedly connected to the inner wall of the through hole, the outer wall of the fixed block is provided with a circular hole, the circular hole extends to the through hole, the circular hole is located below the air outlet pipe, the discharge pipe is vertically fixed through the bottom of the purification box, the bottom end of the discharge pipe is sealed and fitted with the bottom of the fixed block, the collecting hood is detachably mounted on the bottom end of the discharge pipe, the mounting ring is slidably connected to the air outlet pipe up and down, two driving assemblies are arranged on the mounting ring, the two driving assemblies are symmetrically arranged on both sides of the air outlet pipe, and the driving assembly is used to drive the mounting ring to reciprocate and rise and fall.

[0009] Preferably, the driving assembly includes a rotating shaft, which is horizontally inserted into the air outlet pipe and rotatably connected to the air outlet pipe. A cam is installed at one end of the rotating shaft located in the air outlet pipe, and the cam abuts against the top of the mounting ring. The mounting ring is connected to the inner wall of the air outlet pipe through a first spring, and a gear is installed at the other end of the rotating shaft. A transmission rod is vertically penetrated through the top of the purification box, and the bottom end of the transmission rod is vertically fixed on a rack, which meshes with the gear. A connecting plate is fixedly provided on the transmission rod, and the connecting plate is located in the purification box. A second spring is provided on the top of the connecting plate, and both ends of the second spring are respectively connected to the connecting plate and the top of the purification box.

[0010] Preferably, a sealing tube is sleeved on the fixing block, the sealing tube is sealingly fitted with the outer wall of the fixing block, and the sealing tube is fixedly connected to the connecting plate.

[0011] Preferably, the discharge pipe is provided with two opening and closing components, and the two opening and closing components correspond to the two driving components one by one;

[0012] The opening and closing assembly includes a sleeve, which is arranged on the outer wall of the discharge pipe. The sleeve is located in the purification box and is connected to the discharge pipe. A gate plate is slidably connected in the sleeve. The gate plate is hinged to the connecting plate through an inclined connecting rod. The width of the gate plate is equal to the inner diameter of the discharge pipe.

[0013] Preferably, the downward projection of the fixed knife body is wavy, and the top of the fixed knife body and the top of the fixed knife seat are in the same plane;

[0014] A first mounting groove is provided at the left top of the fixed knife seat, and the fixed knife body is fixedly mounted in the first mounting groove. The left side of the downward projection of the fixed knife seat and the left side of the downward projection of the lower beam both overlap with the left side of the downward projection of the fixed knife body.

[0015] Preferably, the movable blade body matches the fixed blade body, the downward projection of the movable blade body is wavy, and the right side of the wavy projection of the movable blade body coincides with the left side of the downward projection of the fixed blade body;

[0016] The movable knife body comprises a second movable knife segment and a plurality of first movable knife segments, wherein the plurality of first movable knife segments are all located in front of the second movable knife segment, the plurality of first movable knife segments are distributed obliquely upward from front to back, and two adjacent groups of first movable knife segments are arranged at intervals in the up-down direction.

[0017] Preferably, the first movable knife segment comprises a left knife and a right knife, and the left knife and the right knife are distributed on the left and right to form a V shape.

[0018] Preferably, the second movable knife segment is located between the uppermost right knife and the lowermost right knife.

[0019] Preferably, the front side height of the second movable knife segment is higher than the rear side height, the second movable knife segment and each right knife have the same inclination angle, the right side height of the left knife is higher than the left side height, and the right end height of the left knife is consistent with the rear end height of the right knife.

[0020] Preferably, a second mounting groove is provided at the right bottom of the movable knife seat, and the movable knife body is fixedly mounted in the second mounting groove, and the right side of the downward projection of the movable knife body coincides with the right side of the downward projection of the movable knife seat.

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] The shearing machine of the present invention can purify the air by sucking in dust-laden air and intercepting dust. Moreover, during the purification process, the filter screen can be cleaned to avoid clogging of the filter screen and prolong the service life of the filter screen. Secondly, the transmission rod is supported by the upper beam to generate relative movement between the transmission rod and the purification box, thereby realizing automatic cleaning of the filter screen, automatic opening and closing of the discharge pipe and automatic sealing of the circular hole, thereby improving the degree of automation. In addition, because the two adjacent groups of first moving knife segments are arranged at intervals in the up and down directions, the replacement is convenient, and the right knife and the left knife are respectively tilted in two directions. The tilted moving knife body can reduce the contact area with the sheared object and increase the shear force on the sheared object, thereby improving the shearing capacity, that is, the shearing is more labor-saving and less abrasive. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A first stereoscopic view of a shearing machine according to the present invention;

[0024] Figure 2 A second stereoscopic view of a shearing machine according to the present invention;

[0025] Figure 3 It is a schematic diagram of the connection structure between the movable knife seat and the movable knife body;

[0026] Figure 4 for Figure 3 Right view of;

[0027] Figure 5 A three-dimensional diagram of a movable knife seat;

[0028] Figure 6 It is a schematic diagram of the connection structure between the fixed knife seat and the movable knife body;

[0029] Figure 7 It is a three-dimensional diagram of a fixed knife seat;

[0030] Figure 8 A three-dimensional diagram of a purification mechanism;

[0031] Fig. 9 Schematic diagram of the internal structure of the purification box;

[0032] Fig.10 It is a schematic diagram of the connection structure between the drive assembly and the mounting ring;

[0033] Fig.11 It is a schematic diagram of the connection structure between the opening and closing component and the discharge pipe.

[0034] in:

[0035] Fixed knife seat 1, movable knife seat 2, material pressing seat 3, upper beam 4, lower beam 5, side beam 6, fixed knife body 7, movable knife body 8, shearing cylinder 9, material pressing cylinder 10, first mounting groove 11, second mounting groove 12;

[0036] Fixed blade section 7.1;

[0037] The second moving blade segment 8.1, the first moving blade segment 8.2;

[0038] Left knife 8.21, right knife 8.22;

[0039] Purification mechanism 100;

[0040] Purification box 101, air hole 102, air outlet pipe 103, mounting ring 104, filter screen 105, fixing block 106, discharge pipe 107, collection cover 108, through hole 109, circular hole 110, driving assembly 111, sealing tube 112, opening and closing assembly 113;

[0041] Rotating shaft 111.1, cam 111.2, first spring 111.3, gear 111.4, transmission rod 111.5, rack 111.6, connecting plate 111.7, second spring 111.8;

[0042] Casing 113.1, gate plate 113.2, connecting rod 113.3. DETAILED DESCRIPTION

[0043] like Figure 1-11 As shown, a shearing machine in this embodiment comprises a fixed knife seat 1, a movable knife seat 2, a material pressing seat 3, an upper beam 4, a lower beam 5 and two side beams 6, the two side beams 6 are distributed front and back, the upper beam 4 and the lower beam 5 are distributed between the two side beams 6 at intervals up and down, the upper beam 4 and the lower beam 5 are fixedly connected to the two side beams 6, the fixed knife seat 1 is fixedly arranged on the lower beam 5, the fixed knife seat 1 is located between the upper beam 4 and the lower beam 5, a fixed knife body 7 is installed on the fixed knife seat 1, the movable knife seat 2 and the material pressing seat 3 are distributed left and right between the fixed knife seat 1 and the upper beam 4, a movable knife body 8 is installed on the movable knife seat 2, and the movable knife seat 2 is driven by a shearing cylinder 9 Lifting, the press seat 3 is driven to lift by the press cylinder 10. During operation, the incoming shearing material is transported from the right to between the fixed knife seat 1 and the press seat 3, and the throat is locked. The press seat 3 is driven to descend by the press cylinder 10, so that the press seat 3 and the fixed knife seat 1 clamp the shearing material to achieve pressing. Subsequently, the moving knife seat 2 is driven to descend by the shear cylinder 9, and a shearing force is generated on the shearing material by the moving knife body 8 and the fixed knife body 7, that is, shearing is achieved. After the shearing is completed, the shear cylinder 9 and the press cylinder 10 drive the moving knife seat 2 and the press seat 3 to rise and reset, and the incoming shearing material continues to be transported from the right to the left, and the shearing action continues;

[0044] The downward projection of the fixed knife body 7 is wavy, and the top of the fixed knife body 7 and the top of the fixed knife seat 1 are in the same plane;

[0045] A first mounting groove 11 is provided at the top of the left side of the fixed knife seat 1, and the fixed knife body 7 is fixedly mounted in the first mounting groove 11, and the left side of the downward projection of the fixed knife seat 1 and the left side of the downward projection of the lower beam 5 both overlap with the left side of the downward projection of the fixed knife body 7;

[0046] The fixed blade body 7 comprises a plurality of fixed blade segments 7.1, which are connected end to end from front to back, and two adjacent fixed blade segments 7.1 form a V shape;

[0047] The movable knife body 8 matches the fixed knife body 7, the downward projection of the movable knife body 8 is wavy, and the right side of the wavy projection of the movable knife body 8 coincides with the left side of the downward projection of the fixed knife body 7;

[0048] The movable blade body 8 comprises a second movable blade segment 8.1 and a plurality of first movable blade segments 8.2, wherein the plurality of first movable blade segments 8.2 are all located in front of the second movable blade segment 8.1, and the plurality of first movable blade segments 8.2 are arranged obliquely upward from front to back, and two adjacent groups of first movable blade segments 8.2 are arranged at intervals in the vertical direction;

[0049] The first movable blade segment 8.2 comprises a left blade 8.21 and a right blade 8.22, and the left blade 8.21 and the right blade 8.22 are arranged on the left and right sides to form a V shape;

[0050] The second movable knife segment 8.1 is located between the uppermost right knife 8.22 and the lowermost right knife 8.22;

[0051] During the shearing process, the first movable blade segment 8.2 at the front side firstly shears off the small pieces on the sheared object, and as the movable blade seat 2 descends, the other first movable blade segments 8.2 successively shear off the small pieces on the sheared object from front to back, and finally, the second movable blade segment 8.1 shears off the small pieces on the rear side of the sheared object. Since two adjacent groups of first movable blade segments 8.2 are arranged at intervals in the vertical direction, when the left blade 8.21, the right blade 8.22 or the second blade segment needs to be replaced due to damage, the corresponding damaged parts can be directly removed without disassembling other undamaged parts, which has the effect of facilitating replacement;

[0052] The front side height of the second movable blade segment 8.1 is higher than the rear side height, the second movable blade segment 8.1 and each right blade 8.22 have the same inclination angle, the right side height of the left blade 8.21 is higher than the left side height, and the right end height of the left blade 8.21 is consistent with the rear end height of the right blade 8.22. In this way, during the shearing process, the right blade 8.22 and the left blade 8.21 are respectively inclined in two directions. The inclined movable blade body 8 can reduce the contact area with the sheared object and increase the shear force on the sheared object. Compared with the single-direction inclination in the prior art, the shearing capacity is improved, the shearing is more labor-saving, and the wear is less.

[0053] A second mounting groove 12 is provided at the right bottom of the movable knife seat 2, and the movable knife body 8 is fixedly mounted in the second mounting groove 12, and the right side of the downward projection of the movable knife body 8 coincides with the right side of the downward projection of the movable knife seat 2;

[0054] It also includes a purification mechanism 100, which is located between the fixed knife seat 1 and the upper beam 4. The purification mechanism 100 is used to collect dust floating in the air during the shearing process to purify the air;

[0055] The purification mechanism 100 includes a purification box 101, which is fixedly arranged on the left side of the movable knife seat 2, and a plurality of air holes 102 are arranged at the bottom of the purification box 101. An air outlet pipe 103 is vertically fixedly penetrated through the top of the purification box 101, and the outer end of the air outlet pipe 103 is connected to an air suction device, wherein the air suction device can be an air suction pump, and a mounting ring 104 is coaxially arranged in the air outlet pipe 103, and a filter screen 105 is installed in the ring hole of the mounting ring 104, and the outer wall of the mounting ring 104 is sealed and connected with the inner wall of the air outlet pipe 103;

[0056] The purification mechanism 100 also includes a fixed block 106, a discharge pipe 107 and a collection cover 108. The fixed block 106 is located in the purification box 101. A through hole 109 is provided on the top of the fixed block 106. The bottom end of the outlet pipe 103 is inserted into the through hole 109. The bottom end of the outlet pipe 103 is sealed and fixedly connected to the inner wall of the through hole 109. A circular hole 110 is provided on the outer wall of the fixed block 106. The circular hole 110 extends to the through hole 109. The circular hole 110 is located at the outlet pipe 103. The discharge pipe 107 is vertically fixed through the bottom of the purification box 101, and the bottom end of the discharge pipe 107 is sealed and fitted with the bottom of the fixing block 106. The collecting cover 108 is detachably mounted on the bottom end of the discharge pipe 107. The mounting ring 104 is slidably connected with the air outlet pipe 103 up and down. Two driving components 111 are arranged on the mounting ring 104, and the two driving components 111 are symmetrically arranged on both sides of the air outlet pipe 103. The driving components 111 are used to drive the mounting ring 104 to reciprocate and rise and fall;

[0057] During shearing, the air in the air outlet pipe 103 is discharged through the suction device, and the dusty air in the shearing process enters the purification box 101 from the air hole 102. The dusty air in the purification box 101 is successively transported from the circular hole 110 and the through hole 109 to the air outlet pipe 103, and the dust in the air is intercepted by the filter 105 to purify the air. After the shearing is completed, the air outlet pipe 103 stops exhausting, and the driving component 111 drives the mounting ring 104 to move up and down reciprocatingly. Under the left and right inertia, the dust on the filter 105 falls off and is successively transported from the through hole 109 and the discharge pipe 107 to the collection cover 108, so as to clean the filter 105 and avoid clogging of the filter 105.

[0058] The driving assembly 111 includes a rotating shaft 111.1, which is horizontally inserted into the air outlet pipe 103, and the rotating shaft 111.1 is rotatably connected to the air outlet pipe 103. A cam 111.2 is installed at one end of the rotating shaft 111.1 located in the air outlet pipe 103, and the cam 111.2 abuts against the top of the mounting ring 104, and the mounting ring 104 is connected to the inner wall of the air outlet pipe 103 through a first spring 111.3. A gear 111.4 is installed at the other end of the rotating shaft 111.1. A transmission rod 111.5 is vertically penetrated through the top of the purification box 101, and the bottom end of the transmission rod 111.5 is vertically fixedly set on a rack 111.6, and the rack 111.6 is meshed with the gear 111.4. A connecting plate 111 is fixedly set on the transmission rod 111.5. 7. The connecting plate 111.7 is located in the purification box 101. A second spring 111.8 is provided on the top of the connecting plate 111.7. Both ends of the second spring 111.8 are respectively connected to the connecting plate 111.7 and the top of the purification box 101. After the shearing is completed, the movable knife seat 2 rises. When the order of the transmission rod 111.5 abuts against the upper beam 4, as the movable knife seat 2 continues to rise, the transmission rod 111.5 and the purification box 101 are relatively moved in the up and down directions, and the second spring 111.8 is deformed. At the same time, the rack 111.6 drives the gear 111.4 to rotate. The rotation of the gear 111.4 drives the cam 111.2 to rotate through the rotating shaft 111.1. In combination with the first spring 111.3, the cam 111.2 drives the mounting ring 104 to reciprocate and rise and fall during the rotation;

[0059] The fixed block 106 is sleeved with a sealing tube 112, which is sealed and fitted with the outer wall of the fixed block 106. The sealing tube 112 is fixedly connected to the connecting plate 111.7. When the movable knife shears the sheared object, the sealing tube 112 is located above the circular hole 110. When the movable knife seat 2 rises, the relative movement between the transmission rod 111.5 and the purification box 101 drives the sealing tube 112 to move downward on the fixed block 106, and the sealing tube 112 blocks the circular hole 110, preventing the dust falling from the filter screen 105 from being discharged from the circular hole 110, thereby improving the dust collection effect;

[0060] The discharge pipe 107 is provided with two opening and closing components 113, and the two opening and closing components 113 correspond to the two driving components 111 one by one, and the two opening and closing components 113 are used to realize the closing and opening of the discharge pipe 107;

[0061] The opening and closing assembly 113 includes a sleeve 113.1, which is arranged on the outer wall of the discharge pipe 107, and is located in the purification box 101. The sleeve 113.1 is connected to the discharge pipe 107, and a gate plate 113.2 is slidably connected in the sleeve 113.1. The gate plate 113.2 is hinged to the connecting plate 111.7 through an inclined connecting rod 113.3. The width of the gate plate 113.2 is equal to the inner diameter of the discharge pipe 107. When the moving knife shears the sheared material, the two gate plates 113.2 are tightly connected in the discharge pipe 107. The sealing is performed so that the discharge pipe 107 is sealed to prevent the dust in the collection cover 108 from entering the through hole 109 from the discharge pipe 107 again during the air purification period. During the period when the movable knife rises and resets, with the relative movement between the transmission rod 111.5 and the purification box 101, the connecting plate 111.7 drives the gate plate 113.2 to move away from the axis of the discharge pipe 107 through the connecting rod 113.3, that is, the two gate plates 113.2 are separated to open the discharge pipe 107. At this time, the air falling from the filter screen 105 can enter the collection cover 108 from the discharge pipe 107;

[0062] In this way, when the movable knife seat 2 descends and performs the shearing action, the sealing tube 112 moves to the top of the circular hole 110, and the two gate plates 113.2 are sealed and fitted to close the discharge pipe 107; when the movable knife seat 2 rises, through the relative movement between the transmission rod 111.5 and the purification box 101, the sealing tube 112 is firstly lowered on the fixed block 106 and blocks the circular hole 110, and at the same time, the two gate plates 113.2 are separated to open the discharge pipe 107, and at the same time, the mounting ring 104 is driven to rise and fall back and forth, so that the dust on the filter screen 105 falls off and is transported to the collection cover 108 from the through hole 109 and the discharge pipe 107 in turn, so that the filter screen 105 is cleaned and the filter screen 105 is prevented from being blocked.

[0063] In addition, when there is a lot of dust in the collecting cover 108, the collecting cover 108 can be removed and the dust inside can be cleaned, and then it can be re-installed on the discharge pipe 107 for reuse;

[0064] Of course, the purification mechanism 100 may be provided with two, wherein the purification box 101 in one purification mechanism 100 is fixedly arranged on the left side of the movable knife seat 2, and the purification box 101 in the other purification mechanism 100 is fixedly arranged on the right side of the material pressing block;

[0065] In summary, the air is purified by inhaling dust-laden air and trapping dust. Moreover, during the purification process, the filter 105 can be cleaned to avoid clogging of the filter 105, thereby extending the service life of the filter 105. Secondly, the upper beam 4 supports the transmission rod 111.5, so that the transmission rod 111.5 and the purification box 101 move relative to each other, thereby realizing automatic cleaning of the filter 105, automatic opening and closing of the discharge pipe 107, and automatic sealing of the circular hole 110, thereby improving the degree of automation. In addition, since the two adjacent groups of first moving knife segments 8.2 are arranged at intervals in the up and down directions, the replacement is facilitated, and the right knife 8.22 and the left knife 8.21 are tilted in two directions respectively. The tilted moving knife body 8 can reduce the contact area with the sheared object and increase the shear force on the sheared object, thereby improving the shearing capacity, that is, the shearing is more labor-saving and the wear is smaller.

[0066] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A shearing machine, comprising a fixed knife seat (1), a movable knife seat (2), a material pressing seat (3), an upper beam (4), a lower beam (5) and two side beams (6), the two side beams (6) are distributed front and back, the upper beam (4) and the lower beam (5) are distributed between the two side beams (6) at intervals in the upper and lower directions, the upper beam (4) and the lower beam (5) are both fixedly connected to the two side beams (6), the fixed knife seat (1) is fixedly arranged on the lower beam (5), the fixed knife seat (1) is located between the upper beam (4) and the lower beam (5), a fixed knife body (7) is installed on the fixed knife seat (1), the movable knife seat (2) and the material pressing seat (3) are distributed left and right between the fixed knife seat (1) and the upper beam (4), a movable knife body (8) is installed on the movable knife seat (2), the movable knife seat (2) is driven to rise and fall by a shearing oil cylinder (9), and the material pressing seat (3) is driven to rise and fall by a material pressing oil cylinder (10), characterized in that: The movable knife seat (2) is provided with a purification mechanism (100), and the purification mechanism (100) is located between the fixed knife seat (1) and the upper beam (4); The purification mechanism (100) comprises a purification box (101), the purification box (101) is fixedly arranged on the left side of the movable knife seat (2), a plurality of air holes (102) are arranged at the bottom of the purification box (101), an air outlet pipe (103) is vertically fixedly penetrated through the top of the purification box (101), the outer end of the air outlet pipe (103) is connected to an air suction device, a mounting ring (104) is coaxially arranged inside the air outlet pipe (103), a filter screen (105) is installed in the ring hole of the mounting ring (104), and the outer wall of the mounting ring (104) is sealed and connected to the inner wall of the air outlet pipe (103); The purification mechanism (100) further comprises a fixed block (106), a discharge pipe (107) and a collection cover (108); the fixed block (106) is located in the purification box (101); a through hole (109) is provided on the top of the fixed block (106); the bottom end of the air outlet pipe (103) is inserted into the through hole (109); the bottom end of the air outlet pipe (103) is sealed and fixedly connected to the inner wall of the through hole (109); a circular hole (110) is provided on the outer wall of the fixed block (106); the circular hole (110) extends to the through hole (109); the circular hole (110) is located at the air outlet pipe ( 103), the discharge pipe (107) is vertically fixed and passes through the bottom of the purification box (101), the bottom end of the discharge pipe (107) is sealed and fitted with the bottom of the fixing block (106), the collecting cover (108) is detachably mounted on the bottom end of the discharge pipe (107), the mounting ring (104) is slidably connected to the air outlet pipe (103) up and down, and two driving components (111) are arranged on the mounting ring (104), and the two driving components (111) are symmetrically arranged on both sides of the air outlet pipe (103), and the driving components (111) are used to drive the mounting ring (104) to reciprocate and rise and fall.

2. A shearing machine according to claim 1, characterized in that: The driving assembly (111) comprises a rotating shaft (111.1), the rotating shaft (111.1) is horizontally inserted into the air outlet pipe (103), the rotating shaft (111.1) is rotatably connected to the air outlet pipe (103), one end of the rotating shaft (111.1) located in the air outlet pipe (103) is equipped with a cam (111.2), the cam (111.2) abuts against the top of the mounting ring (104), the mounting ring (104) is connected to the inner wall of the air outlet pipe (103) via a first spring (111.3), the other end of the rotating shaft (111.1) is equipped with a gear (111.4), and the net A transmission rod (111.5) is vertically penetrated through the top of the purification box (101); the bottom end of the transmission rod (111.5) is vertically fixed on a rack (111.6); the rack (111.6) is meshed with a gear (111.4); a connecting plate (111.7) is fixedly arranged on the transmission rod (111.5); the connecting plate (111.7) is located in the purification box (101); a second spring (111.8) is arranged on the top of the connecting plate (111.7); two ends of the second spring (111.8) are respectively connected to the connecting plate (111.7) and the top of the purification box (101).

3. A shearing machine according to claim 2, characterized in that: The fixing block (106) is sleeved with a sealing tube (112), the sealing tube (112) is sealingly fitted to the outer wall of the fixing block (106), and the sealing tube (112) is fixedly connected to the connecting plate (111.7).

4. A shearing machine according to claim 1, characterized in that: The discharge pipe (107) is provided with two opening and closing components (113), and the two opening and closing components (113) correspond to the two driving components (111) one by one; The opening and closing assembly (113) comprises a sleeve (113.1), wherein the sleeve (113.1) is arranged on the outer wall of the discharge pipe (107), the sleeve (113.1) is located in the purification box (101), the sleeve (113.1) is connected to the discharge pipe (107), a gate plate (113.2) is slidably connected inside the sleeve (113.1), the gate plate (113.2) is hinged to the connecting plate (111.7) through an inclined connecting rod (113.3), and the width of the gate plate (113.2) is equal to the inner diameter of the discharge pipe (107).

5. A shearing machine according to claim 1, characterized in that: The downward projection of the fixed knife body (7) is wavy, and the top of the fixed knife body (7) and the top of the fixed knife seat (1) are in the same plane; A first mounting groove (11) is provided at the top left side of the fixed knife seat (1), and the fixed knife body (7) is fixedly mounted in the first mounting groove (11). The left side of the downward projection of the fixed knife seat (1) and the left side of the downward projection of the lower beam (5) both overlap with the left side of the downward projection of the fixed knife body (7).

6. A shearing machine according to claim 5, characterized in that: The movable blade body (8) matches the fixed blade body (7), the downward projection of the movable blade body (8) is wavy, and the right side of the wavy projection of the movable blade body (8) coincides with the left side of the downward projection of the fixed blade body (7); The movable blade body (8) comprises a second movable blade segment (8.1) and a plurality of first movable blade segments (8.2), the plurality of first movable blade segments (8.2) are all located in front of the second movable blade segment (8.1), the plurality of first movable blade segments (8.2) are distributed obliquely upward from front to back, and two adjacent groups of first movable blade segments (8.2) are arranged at intervals in the up-down direction.

7. A shearing machine according to claim 6, characterized in that: The first movable knife segment (8.2) comprises a left knife (8.21) and a right knife (8.22), and the left knife (8.21) and the right knife (8.22) are distributed on the left and right to form a V shape.

8. A shearing machine according to claim 7, characterized in that: The second movable knife segment (8.1) is located between the uppermost right knife (8.22) and the lowermost right knife (8.22).

9. A shearing machine according to claim 7, characterized in that: The front side height of the second movable knife segment (8.1) is higher than the rear side height, the second movable knife segment (8.1) and each right knife (8.22) have the same inclination angle, the right side height of the left knife (8.21) is higher than the left side height, and the right end height of the left knife (8.21) is consistent with the rear end height of the right knife (8.22).

10. A shearing machine according to claim 6, characterized in that: A second mounting groove (12) is provided at the right bottom of the movable knife seat (2), and the movable knife body (8) is fixedly mounted in the second mounting groove (12), and the right side of the downward projection of the movable knife body (8) coincides with the right side of the downward projection of the movable knife seat (2).

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