Metal scrap shearing machine

Abstract

The invention relates to the technical field of shearing equipment, and particularly discloses a metal scrap shearing machine which comprises a rack, and a material conveying groove, a shearing knife located above the discharging end of the material conveying groove and a material arranging assembly located below the discharging end of the material conveying groove are arranged on the rack. The material arranging assembly comprises a lifting frame assembled on the rack in an up-and-down moving mode, a lifting driver for driving the lifting frame to ascend and descend and a plurality of material arranging units distributed in the left-and-right direction. The comb teeth are arranged in pairs and assembled on the lifting frame in a left-right moving mode, the hinged rods are connected between the comb teeth and the rack in pairs, the comb teeth in pairs are provided with pushing faces which face each other and are used for pushing metal waste, the upper ends of the hinged rods are hinged to the comb teeth, and the lower ends of the hinged rods are hinged to the rack; the conveying groove is provided with a material arranging opening used for allowing the comb teeth to penetrate into the conveying groove upwards. According to the metal scrap shearing machine, to-be-sheared strip-shaped metal scraps can be arranged in order, and the size consistency of sheared fragments is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of shearing equipment, and particularly relates to a metal waste shearing machine. Background Art

[0002] With the acceleration of the industrialization process, the generation amount of metal waste is increasing continuously. If these metal wastes are discarded randomly, they will not only occupy a large amount of land, but also cause serious pollution to the environment. Therefore, the recycling of metal waste becomes particularly important. Through an effective recycling system, waste metal products, scraps, etc. can be collected centrally to realize the circular utilization of resources, reduce the exploitation of primary mineral resources, and lower energy consumption and environmental pollution. However, recycling is only the first step in metal waste treatment. In order to enable it to re-enter the production process, a series of processing steps are required, including sorting, cleaning, crushing, smelting and other links. In this process, the metal waste shearing machine plays a key role. It can efficiently cut metal wastes of various shapes and sizes into required specifications, which is convenient for subsequent smelting or direct reuse. This equipment not only improves the processing efficiency, but also reduces the labor cost, and has become an indispensable core equipment in the metal waste processing process.

[0003] In the prior art, for a metal waste shearing machine, such as a metal waste shearing machine disclosed in a Chinese patent document with the authorization announcement number of CN215145110U, the metal waste shearing machine drives a threaded rod to rotate through a motor. Through the cooperation of the external thread on the outer side of the threaded rod and the threaded hole inside the movable block, the movable block moves in the movable groove. Through a slide rod, the movement of the pushing plate is made more stable, realizing automatic pushing of metal waste, and having a better conveying effect on the metal waste, improving the working efficiency of the shearing machine; also, the shearing knife is fixed to the hydraulic cylinder through a mounting groove, the hydraulic cylinder drives the shearing knife to move up and down, the shearing knife is limited by a chute, and the mounting groove is limited by a limiting rod, so that the up and down movement effect of the shearing knife is better. The metal waste is sheared by the shearing knife, and the shearing effect on the metal waste is better, improving the practicability of the shearing machine.

[0004] However, when the above metal waste shearing machine in the prior art shears strip-shaped metal wastes, such as steel bars, metal rods or pipes, etc., since the strip-shaped metal wastes usually enter the shearing machine in a chaotic stack, and the arrangement directions of the unorganized strip-shaped metal wastes are inconsistent, they may be arranged obliquely relative to the shearing knife. Even if the set shearing length of the shearing machine is fixed, the actual shearing length will deviate due to the arrangement direction of the strip-shaped metal wastes, resulting in inconsistent sizes of the sheared fragments. Summary of the Invention

[0005] The present invention provides a metal waste shearing machine, aiming to solve the problem in the related art that the actual shearing length of the metal waste shearing machine will deviate due to the arrangement direction of the strip-shaped metal waste, resulting in inconsistent sizes of the sheared fragments.

[0006] The following technical solution is adopted for the metal waste shearing machine provided by the present invention: A metal waste shearing machine includes a frame. A feeding trough extending forward and backward in length is arranged on the frame, and a shearing knife is located above the discharging end of the feeding trough. An aligning component is further arranged on the frame below the discharging end of the feeding trough. The aligning component includes a lifting frame movably assembled up and down on the frame, a lifting driver installed on the frame for driving the lifting frame to lift, and a plurality of aligning units distributed left and right. Each of the aligning units includes a pair of comb teeth movably assembled left and right on the lifting frame, and a pair of articulated rods connected between the comb teeth and the frame. The pair of comb teeth have pushing surfaces facing each other for pushing the metal waste. The upper end of the articulated rod is hinged to the comb tooth, and the lower end of the articulated rod is hinged to the frame. The feeding trough is provided with an aligning opening for allowing the comb teeth to penetrate upward into the feeding trough. When the lifting driver drives the lifting frame to rise, the lifting frame drives the comb teeth to penetrate upward through the aligning opening and insert into the metal waste. The pair of articulated rods pull the pair of comb teeth closer to each other, so that the pushing surfaces of the comb teeth push the metal waste straight along the length direction of the feeding trough.

[0007] By adopting the above technical solution, an aligning component is arranged below the discharging end. The lifting frame drives the pair of comb teeth to insert upward into the metal waste, and through the geometric constraint of the articulated rods, the pair of comb teeth are pulled closer to each other, so that the pushing surfaces of the pair of comb teeth push the metal waste straight along the length direction of the feeding trough, arranging the strip-shaped metal waste to be sheared neatly, ensuring that the strip-shaped metal waste under the shearing knife maintains a consistent arrangement direction, which is beneficial for the shearing knife to shear more accurately, thereby improving the consistency of the sizes of the sheared fragments and optimizing the shearing quality.

[0008] Further, each of the aligning units further includes a pair of moving seats for installing the comb teeth, and the lower end of the moving seat is hinged to the upper end of the articulated rod.

[0009] Further, the lifting frame is provided with a pair of limiting grooves extending left and right for assembling the moving seats, and a limiting portion is left between the pair of limiting grooves.

[0010] Further, the comb teeth are movably assembled left and right on the moving seat, and a mating groove extending up and down is formed at the lower end of the comb tooth. A vibrating wheel for driving the comb teeth to vibrate left and right is rotatably installed on the moving seat, and an eccentric shaft movably assembled in the mating groove is arranged on the vibrating wheel.

[0011] By adopting the above technical solution, vibration can loosen the metal scraps and reduce the insertion resistance, so that the comb teeth can be inserted into the scrap pile more easily, and the entangled metal scraps can be effectively separated to improve the sorting efficiency.

[0012] Furthermore, a driving gear is coaxially mounted on the vibration wheel, and each of the material-forming units further comprises a pair of movable frames assembled on the frame for left-right movement, and the movable frames are provided with fixed racks extending up and down and meshing with the driving gear.

[0013] Furthermore, the mobile frame is provided with a main lifting slot extending up and down for assembling the lifting frame, and an auxiliary lifting slot extending up and down for assembling the mobile seat, and the mobile seat is provided with a protruding part which is inserted into the auxiliary lifting slot and can drive the mobile frame to move left and right.

[0014] Furthermore, the upper ends of the comb teeth are in the shape of an outwardly convex arc surface.

[0015] The above technical solution is used to reduce the resistance when the comb teeth are inserted into the waste pile, which is conducive to the comb teeth being inserted into the metal waste more smoothly.

[0016] Furthermore, the feed trough is equipped with a blocking plate that moves forward and backward at the feed opening, and a blocking spring is arranged between the blocking plate and the feed trough, and the blocking spring is used to apply elastic force to the blocking plate to move the blocking plate toward the discharge end to close the feed opening, and extension rods are arranged at the left and right ends of the blocking plate, and pushing parts opposite to the extension rods are arranged at the left and right ends of the lifting frame, and the upper surface of the pushing part forms an inclined surface for pushing the extension rod to move the blocking plate toward the feed end to open the feed opening.

[0017] By adopting the above technical solution, the sealing plate can close the material outlet in the waiting state to prevent metal scraps from accidentally falling into the material outlet and causing the equipment to be blocked. When entering the sorting state, it can automatically open the material outlet by coordinating with the movement of the lifting frame, allowing the comb teeth to work, so as to ensure the smooth progress of the sorting process.

[0018] Furthermore, the frame is also provided with a material stripping plate located on the side of the whole material assembly away from the feed end, the upper end of the material stripping plate is hinged to the feed trough, the lower end of the material stripping plate is hinged to a moving rod assembled on the lower end of the frame for forward and backward movement, a connecting rod for driving the moving rod to move forward and backward is provided between the lifting frame and the moving rod, the upper end of the connecting rod is hinged to the lifting frame, and the lower end of the connecting rod is hinged to the moving rod.

[0019] By adopting the above technical solution, the material-moving plate can swing after shearing is completed by cooperating with the movement of the lifting frame to move the sheared fragments away from the shearing area, prevent the sheared fragments from accumulating, and improve work efficiency.

[0020] Furthermore, the material pushing plate includes an inner plate body and an outer plate body sleeved outside the inner plate body and movable relative to the inner plate body.

[0021] The beneficial effects of the metal waste shearing machine provided by the present invention are as follows: a material aligning assembly is arranged below the discharge end. The lifting frame drives the paired comb teeth to insert upward into the metal waste, and through the geometric constraint of the hinge rod, the paired comb teeth approach each other, so that the pushing surfaces of the paired comb teeth push the metal waste along the length direction of the material conveying groove to straighten it, neatly arranging the strip-shaped metal waste to be sheared, ensuring that the strip-shaped metal waste under the shearing knife maintains a consistent arrangement direction, which is beneficial for the shearing knife to perform shearing more accurately, thereby improving the consistency of the fragment size after shearing, optimizing the shearing quality. The neatly arranged metal waste can also reduce the resistance during shearing, avoid excessive shearing force caused by waste entanglement or stacking, improve the shearing efficiency, and reduce the equipment energy consumption. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the metal waste shearing machine of the present invention.

[0023] Figure 2 is a schematic structural diagram of the material aligning assembly of the metal waste shearing machine of the present invention.

[0024] Figure 3 is a schematic structural diagram of the material aligning assembly of the metal waste shearing machine of the present invention from another perspective.

[0025] Figure 4 is a schematic structural diagram of the material aligning unit of the metal waste shearing machine of the present invention.

[0026] Figure 5 is a schematic structural diagram of the material aligning unit of the metal waste shearing machine of the present invention from another perspective.

[0027] Figure 6 is a schematic structural diagram of the vibration wheel of the metal waste shearing machine of the present invention.

[0028] Figure 7 is a schematic structural diagram of the comb teeth of the metal waste shearing machine of the present invention.

[0029] Reference Signs: 10. Frame; 110. Feeding trough; 111. Stocking port; 120. Shearing knife; 130. Shearing driver; 140. Pressing component; 20. Lifting frame; 210. Limiting groove; 220. Limiting part; 230. Pushing part; 30. Lifting driver; 40. Stocking unit; 410. Comb teeth; 411. Pushing surface; 412. Fitting groove; 420. Hinge rod; 430. Moving seat; 431. Extending part; 440. Vibration wheel; 441. Eccentric shaft; 450. Driving gear; 460. Moving frame; 462. Secondary lifting groove; 470. Fixed rack; 50. Sealing plate; 510. Sealing spring; 520. Extending rod; 60. Material pushing plate; 610. Moving rod; 620. Connecting rod; 630. Inner plate body; 640. Outer plate body. Detailed implementation manners

[0030] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation of the present invention.

[0031] As Figures 1 to 7 shown, and with reference to Figure 1 the orientation shown in, an embodiment of the metal waste shearing machine of the present invention is used for shearing strip-shaped metal waste, and includes a frame 10, a feeding trough 110, a shearing knife 120, a shearing driver 130, a pressing component 140, a feeding component and a stocking component. The feeding trough 110, the shearing knife 120, the shearing driver 130, the pressing component 140, the feeding component and the stocking component are respectively arranged on the frame 10.

[0032] Among them, the frame 10 is the basic structure of the entire shearing machine, used for supporting and fixing other components. The frame 10 is made of high-strength steel to ensure the stability and durability of the equipment during operation; the feeding trough 110 is strip-shaped, extending forward and backward in the length direction and left and right in the width direction, and is used for storing and conveying strip-shaped metal waste to be sheared. The front end of the feeding trough 110 is the feeding end, and the rear end is the discharging end; the shearing knife 120 is located above the discharging end of the feeding trough 110 and is the core component of the shearing machine, used for shearing strip-shaped metal waste; the shearing driver 130 is a hydraulic cylinder, used to provide power for the shearing knife 120 and drive the shearing knife 120 to move up and down; the pressing component 140 is used to apply pressure to the strip-shaped metal waste in the feeding trough 110 to ensure its stability during shearing; the feeding component is used to feed the strip-shaped metal waste in the feeding trough 110 from the feeding end to the discharging end to ensure that the strip-shaped metal waste can accurately enter the shearing area; the stocking component is located below the discharging end of the feeding trough 110 and is used for sorting the strip-shaped metal waste entering the shearing area.

[0033] As Figure 2 and Figure 3As shown in the figure, the blanking assembly includes a lifting frame 20 that is vertically movably assembled on the frame 10, a lifting drive 30 installed on the frame 10 for driving the lifting of the lifting frame 20, and a plurality of blanking units 40 distributed left and right. In the embodiment, the lifting drive 30 is a hydraulic cylinder, and the number of blanking units 40 is set to four. In other embodiments, the lifting drive 30 can also be a cylinder or an electric push rod, and the number of blanking units 40 can also be set to five, six, etc. Specifically, various factors such as the width of the feeding chute 110, the type of metal waste to be processed, the processing efficiency, and the equipment cost should be comprehensively considered according to the actual situation. For example, when the feeding chute 110 is wider, more blanking units 40 are required to cover the entire width, and when processing metal waste with smaller size and higher winding degree, a denser arrangement of blanking units 40 is needed.

[0034] It should be noted that the blanking assembly is arranged close to the shearing knife 120 and on the front side of the shearing knife 120, and is horizontally offset from the shearing knife 120 to prevent the blanking assembly from affecting the normal progress of the shearing process.

[0035] The lifting frame 20 is provided with limiting grooves 210 extending left and right. The limiting grooves 210 are arranged in pairs, and there is a limiting portion 220 between the paired limiting grooves 210. The number of limiting grooves 210 is set to four pairs corresponding to the four blanking units 40.

[0036] As Figures 2 to 7 shown in the figure, each blanking unit 40 includes a pair of moving seats 430 that are horizontally movably assembled in the limiting grooves 210, a pair of comb teeth 410 that are horizontally movably assembled on the moving seats 430, a pair of hinge rods 420 connected between the moving seats 430 and the frame 10, and a pair of moving frames 460 that are horizontally movably assembled on the frame 10.

[0037] The paired comb teeth 410 have a pushing surface 411 facing each other for pushing the metal waste. The height of the pushing surface 411 is adapted to the stacking height of the waste pile to ensure that it can be inserted into the waste pile; the size of the pushing surface 411 in the front-rear direction is determined according to the type of metal waste to be processed. When processing metal waste with larger size, a longer pushing surface 411 is required to ensure sufficient thrust, and when processing metal waste with smaller size, a shorter pushing surface 411 is needed to avoid excessive extrusion. The upper ends of each comb tooth 410 are all in the shape of an outwardly convex arc-shaped surface to reduce the resistance when the comb tooth 410 is inserted into the waste pile, which is beneficial to the comb tooth 410 being more smoothly inserted into the metal waste. The lower ends of each comb tooth 410 are all provided with a mating groove 412 extending up and down.

[0038] The paired articulated rods 420 are distributed in a V shape. The upper ends of the articulated rods 420 are hinged to the lower ends of the corresponding moving seats 430, and the lower ends of the articulated rods 420 are hinged to the frame 10. When the lifting driver 30 drives the lifting frame 20 to move upward, the lifting frame 20 drives the moving seat 430 to move upward synchronously. The comb teeth 410 on the moving seat 430 can be inserted upward into the waste pile. At the same time, the paired articulated rods 420 can, through geometric constraints, convert the vertical movement of the moving seat 430 into a horizontal movement, thereby driving the paired moving seats 430 to approach each other in the left-right direction, so that the paired comb teeth 410 approach each other, and further enabling the pushing surface 411 of the comb teeth 410 to straighten the metal waste along the length direction of the conveying groove 110.

[0039] It should be noted that the setting of the limiting part 220 can act as a physical barrier to limit the stroke of the moving seat 430, force the moving seat 430 to stop moving, ensure that the closing distance between the paired moving seats 430 does not exceed the design limit, and avoid excessive clamping force between the paired comb teeth 410 causing deformation of the metal waste.

[0040] Two vibration wheels 440 are rotatably installed on each moving seat 430. The two vibration wheels 440 are distributed on the front and rear sides of the comb teeth 410 and are used to drive the comb teeth 410 to vibrate left and right. Vibration can loosen the metal waste, reduce the insertion resistance, make it easier for the comb teeth 410 to insert into the waste pile, and effectively separate the entangled metal waste, improving the sorting efficiency. An eccentric shaft 441 movably assembled in the fitting groove 412 is arranged on one side of each vibration wheel 440 close to the comb teeth 410, and a driving gear 450 is coaxially installed on the other side of each vibration wheel 440 far from the comb teeth 410.

[0041] A main lifting groove extending vertically for assembling the lifting frame 20 and a secondary lifting groove 462 extending vertically for assembling the moving seat 430 are formed on the moving frame 460. An extending part 431 that is inserted into the secondary lifting groove 462 and can drive the moving frame 460 to move left and right is arranged on the moving seat 430. A fixed rack 470 extending vertically and meshing with the driving gear 450 is arranged on the moving frame 460. The fixed rack 470 is used to make the driving gear 450 rotate through meshing when the lifting frame 20 moves upward, so that the driving gear 450 drives the vibration wheel 440 to rotate, and thus the eccentric shaft 441 on the vibration wheel 440 drives the comb teeth 410 to vibrate left and right on the moving seat 430 by pushing the groove wall of the fitting groove 412.

[0042] As Figure 3 and Figure 5As shown in the figure, the material feeding chute 110 is provided with a material rectifying opening 111 for allowing the comb teeth 410 to penetrate upward into the material feeding chute 110, and a sealing plate 50 is movably assembled back and forth at the material rectifying opening 111. A sealing spring 510 is arranged between the sealing plate 50 and the material feeding chute 110. The sealing spring 510 is used to apply an elastic force to the sealing plate 50 so that the sealing plate 50 moves toward the discharging end to close the material rectifying opening 111. At the left and right ends of the sealing plate 50, there are extending rods 520. At the left and right ends of the lifting frame 20, there are pushing parts 230 that are vertically opposite to the extending rods 520. The upper surface of the pushing part 230 forms an inclined surface for pushing against the extending rods 520 so that the sealing plate 50 moves toward the feeding end to open the material rectifying opening 111. The sealing plate 50 can close the material rectifying opening 111 in the state to be sorted, preventing the metal waste from accidentally falling into the material rectifying opening 111 and causing the equipment to be blocked and jammed. And when entering the sorting state, it can automatically open the material rectifying opening 111 through the movement cooperation with the lifting frame 20, allowing the comb teeth 410 to work to ensure the smooth progress of the sorting process.

[0043] As Figure 1 , Figure 3 and Figure 5 shown in the figure, a material pushing plate 60 is further arranged on the frame 10 on the side of the material rectifying assembly away from the feeding end. The upper end of the material pushing plate 60 is hinged to the material feeding chute 110, and the lower end of the material pushing plate 60 is hinged to a moving rod 610 that is movably assembled back and forth at the lower end of the frame 10. A connecting rod 620 for driving the moving rod 610 to move back and forth is arranged between the lifting frame 20 and the moving rod 610. The upper end of the connecting rod 620 is hinged to the lifting frame 20, and the lower end of the connecting rod 620 is hinged to the moving rod 610. The material pushing plate 60 can swing after the shearing is completed through the movement cooperation with the lifting frame 20 to push the sheared fragments away from the shearing area, preventing the accumulation of the sheared fragments and improving the working efficiency.

[0044] The material pushing plate 60 includes an inner plate body 630 and an outer jacket plate 640 sleeved outside the inner plate body 630 and movable relative to the inner plate body 630. The cooperation between the inner plate body 630 and the outer jacket plate 640 can realize the telescopic property of the material pushing plate 60 to adapt to the swinging action of the material pushing plate 60.

[0045] The working process of the embodiment of the metal waste shearing machine of the present invention includes the following steps: The first step is waste material conveying. The strip-shaped metal waste enters from the feeding end of the material feeding chute 110. The feeding assembly feeds the strip-shaped metal waste in the material feeding chute 110 from the feeding end to the discharging end. The pressing assembly 140 applies pressure to the strip-shaped metal waste in the material feeding chute 110 to ensure its stability during the shearing process.

[0046] In the second step, for waste sorting, the lifting driver 30 drives the lifting frame 20 to rise. The lifting frame 20 drives the moving seat 430 to move upward synchronously. The comb teeth 410 on the moving seat 430 can then move upward through the material sorting opening 111 and insert into the waste pile. At the same time, through geometric constraints, the paired hinge rods 420 convert the vertical movement of the moving seat 430 into horizontal movement, thereby driving the paired moving seats 430 to approach each other in the left - right direction, so that the paired comb teeth 410 approach each other. Furthermore, the pushing surface 411 of the comb teeth 410 straightens the metal waste along the length direction of the material conveying trough 110, arranging it neatly.

[0047] In the third step, for waste shearing, the shearing driver 130 drives the shearing knife 120 to move downward, and the shearing knife 120 shears the metal waste sorted by the comb teeth 410. When the lifting frame 20 rises, it pulls the moving rod 610 to move forward through the connecting rod 620. The moving rod 610 drives the material deflecting plate 60 to swing towards the shearing area. The material deflecting plate 60 is generally in a vertical state, and the sheared fragments fall behind the material deflecting plate 60.

[0048] In the fourth step, the comb teeth 410 retract. The lifting driver 30 drives the lifting frame 20 to descend, and the comb teeth 410 move downward and exit the material conveying trough 110. The blocking plate 50 closes the material sorting opening 111 under the action of the blocking spring 510.

[0049] In the fifth step, for waste deflection, when the lifting frame 20 descends, it pulls the moving rod 610 to move backward through the connecting rod 620. The moving rod 610 drives the material deflecting plate 60 to swing out of the shearing area to deflect the sheared fragments away from the shearing area, preventing waste accumulation.

[0050] In this way, in the embodiment of the metal waste shearing machine of the present invention, a material sorting assembly is provided below the discharge end. The lifting frame 20 drives the paired comb teeth 410 to insert upward into the metal waste, and through the geometric constraints of the hinge rods 420, the paired comb teeth 410 approach each other, so that the pushing surface 411 of the paired comb teeth 410 straightens the metal waste along the length direction of the material conveying trough 110, arranging the strip - shaped metal waste to be sheared neatly. This ensures that the strip - shaped metal waste under the shearing knife 120 maintains a consistent arrangement direction, which is beneficial for the shearing knife 120 to perform shearing more accurately, thereby improving the consistency of the sizes of the sheared fragments, optimizing the shearing quality. The neatly arranged metal waste can also reduce the resistance during shearing, avoid excessive shearing force caused by waste entanglement or stacking, improve the shearing efficiency, and reduce the energy consumption of the equipment.

[0051] Although the embodiments of the present invention have been shown and described above, it can be understood that the above - mentioned embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above - mentioned embodiments within the scope of the present invention.

Claims

1. A metal scrap shearing machine, comprising a frame (10), the frame (10) being provided with a feed trough (110) extending forward and backward, and a shearing knife (120) located above a discharge end of the feed trough (110), characterized in that: The frame (10) is also provided with a material-forming assembly located below the discharge end of the material conveying trough (110), the material-forming assembly comprising a lifting frame (20) mounted on the frame (10) and movably mounted thereon, a lifting drive (30) mounted on the frame (10) and used to drive the lifting frame (20) to move upward and downward, and a plurality of material-forming units (40) distributed leftward and rightward; each of the material-forming units (40) comprises comb teeth (410) arranged in pairs and movably mounted on the lifting frame (20) leftward and rightward, and a pair of hinged rods (420) connected between the comb teeth (410) and the frame (10), the paired comb teeth (410) having pushing surfaces (411) facing each other and used to push metal scraps, the upper end of the hinged rod (420) being hinged to the comb teeth (410), and the lower end of the hinged rod (420) being hinged to the frame (10); The feed trough (110) is provided with a material-forming opening (111) for allowing the comb teeth (410) to pass upward into the feed trough (110); when the lifting drive (30) drives the lifting frame (20) to rise, the lifting frame (20) drives the comb teeth (410) to pass upward through the material-forming opening (111) and insert into the metal waste; the paired hinged rods (420) pull the paired comb teeth (410) toward each other, so that the pushing surfaces (411) of the comb teeth (410) push the metal waste straight along the length direction of the feed trough (110).

2. A metal scrap shearing machine according to claim 1, characterized in that: Each of the monolithic units (40) further comprises movable seats (430) arranged in pairs for mounting the comb teeth (410), wherein the lower end of the movable seat (430) is hingedly connected to the upper end of the hinge rod (420).

3. A metal scrap shearing machine according to claim 2, characterized in that: The lifting frame (20) is provided with limit grooves (210) extending left and right in pairs, the limit grooves (210) being used to assemble the moving seat (430), and a limit portion (220) is left between the pair of limit grooves (210).

4. A metal scrap shearing machine according to claim 2, characterized in that: The comb teeth (410) are assembled on the movable seat (430) so as to be movable left and right, and a matching groove (412) extending up and down is provided at the lower end of the comb teeth (410). A vibration wheel (440) for driving the comb teeth (410) to vibrate left and right is rotatably mounted on the movable seat (430), and an eccentric shaft (441) is provided on the vibration wheel (440) so as to be movable and assembled in the matching groove (412).

5. A metal scrap shearing machine according to claim 4, characterized in that: A driving gear (450) is coaxially mounted on the vibration wheel (440), and each of the material-forming units (40) further comprises a pair of movable racks (460) mounted on the frame (10) for left-right movement, wherein the movable racks (460) are provided with fixed racks (470) extending up and down and meshing with the driving gear (450).

6. A metal scrap shearing machine according to claim 5, characterized in that: The movable frame (460) is provided with a main lifting groove extending up and down for assembling the lifting frame (20), and a secondary lifting groove (462) extending up and down for assembling the movable seat (430), and the movable seat (430) is provided with a protruding portion (431) which is inserted into the secondary lifting groove (462) and can drive the movable frame (460) to move left and right.

7. A metal scrap shearing machine according to any one of claims 1 to 6, characterized in that: The upper ends of the comb teeth (410) are in the shape of an outwardly convex arc surface.

8. A metal scrap shearing machine according to any one of claims 1 to 6, characterized in that: The feed trough (110) is equipped with a blocking plate (50) that moves forward and backward at the material discharging port (111), and a blocking spring (510) is provided between the blocking plate (50) and the feed trough (110). The blocking spring (510) is used to apply elastic force to the blocking plate (50) so that the blocking plate (50) moves toward the discharge end to close the material discharging port (111). The left and right ends of the blocking plate (50) are provided with extension rods (520), and the left and right ends of the lifting frame (20) are provided with pushing parts (230) that are opposite to the extension rods (520) in upper and lower directions. The upper surface of the pushing part (230) forms an inclined surface for pushing against the extension rod (520) so that the blocking plate (50) moves toward the feed end to open the material discharging port (111).

9. A metal scrap shearing machine according to any one of claims 1 to 6, characterized in that: The frame (10) is also provided with a material shifting plate (60) located on a side of the material assembly away from the feed end, the upper end of the material shifting plate (60) is hinged to the material conveying trough (110), the lower end of the material shifting plate (60) is hinged to a moving rod (610) mounted on the lower end of the frame (10) for forward and backward movement, and a connecting rod (620) is provided between the lifting frame (20) and the moving rod (610) for driving the moving rod (610) to move forward and backward, the upper end of the connecting rod (620) is hinged to the lifting frame (20), and the lower end of the connecting rod (620) is hinged to the moving rod (610).

10. A metal scrap shearing machine according to claim 9, characterized in that: The material shifting plate (60) comprises an inner plate body (630) and an outer plate (640) which is sleeved outside the inner plate body (630) and is movable relative to the inner plate body (630).

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