Steel frame cutting device for goods shelf manufacturing

Abstract

The invention provides a steel frame cutting device for goods shelf manufacturing, and belongs to the technical field of goods shelf machining, the steel frame cutting device comprises a workbench and a hydraulic cylinder vertically arranged at the right end of the workbench, a lifting frame is arranged at the execution end of the hydraulic cylinder, and a transition frame used for bearing a disk saw and a servo motor used for driving the transition frame to rotate are arranged on the lifting frame; a material pushing frame is transversely and slidably connected to the workbench, a plurality of material pushing plates capable of abutting against square steel pipes are transversely and slidably connected to the material pushing frame, a guide shaft is arranged in the middle of each material pushing plate, a swing rod is hinged to the left end of the workbench, horizontally-arranged transverse rods are hinged to the front end and the rear end of the swing rod, and lantern rings are arranged at the right ends of the two transverse rods. Two stand columns matched with the lantern rings are symmetrically arranged on the transition frame in the front-back direction, the outer portion of each transverse rod is sleeved with a sleeve, a linkage frame is hinged between the two sleeves, and a guide sliding opening is formed in the middle of the linkage frame; the overall efficiency of goods shelf manufacturing can be improved while the cutting loss is reduced.

Description

Technical Field

[0001] This application relates to the technical field of shelf processing, and particularly relates to a steel frame cutting device for shelf manufacturing. Background Art

[0002] A shelf is a support structure used for storing and displaying items, and is widely used in industries such as warehousing, logistics, and retail. They can be designed into various types according to different requirements and usage scenarios, and have a certain number of layers and structural designs for storing and retrieving items. Shelves are usually made of metal materials, so it is necessary to make metal molds according to design requirements, and then perform processes such as cutting, bending, welding, and punching on them to form them.

[0003] When using square steel pipes as the base material for shelf manufacturing, the end faces of the square steel pipes often need to be cut into an inclined state, and then the inclined end faces of two square steel pipes are aligned and welded together to increase the contact area between adjacent square steel pipes, thereby improving the firmness between the two square steel pipes and helping to enhance the overall structural stability and load-bearing capacity of the shelf.

[0004] Referring to the Chinese patent document with the publication number CN217142506U, the publication date of August 9, 2022, and the name of a steel frame cutting device for shelf manufacturing, when cutting long steel materials, first place the end of the steel material under the circular saw. After measuring and adjusting the length of the steel material to be cut, the circular saw completes the final cutting of the steel material.

[0005] Referring to the above technical solution, when using a circular saw to cut the end face of a square steel pipe, it is necessary to first adjust the circular saw to a specified angle based on the placement position of the square steel pipe, and then the circular saw directly cuts the square steel pipe. In this case, limited by the cutting path of the circular saw, for the end face cutting work of a large number of neatly stacked square steel pipes on the workbench, the circular saw may cause some square steel pipes to be cut off excessively during a single cutting process, which easily leads to an increase in losses. Therefore, in order to improve the cutting accuracy and reduce the cutting loss at the same time, the end face cutting work of the square steel pipe is often completed by the method of cutting one by one, but this method is likely to affect the overall efficiency of shelf manufacturing. Summary of the Invention

[0006] In view of this, this application provides a steel frame cutting device for shelf manufacturing, which is mainly used to solve the problem of large cutting losses during the large-scale end face cutting work of square steel pipes.

[0007] To solve the above technical problems, the present application provides a steel frame cutting device for shelf manufacturing, including a workbench and a hydraulic cylinder vertically arranged at the right end thereof. The execution end of the hydraulic cylinder is provided with a lifting frame, and a transition frame for carrying a circular saw and a servo motor for driving the transition frame to rotate are arranged on the lifting frame; a pushing frame is horizontally slidably connected to the workbench, and a plurality of pushing plates capable of abutting against square steel pipes are horizontally slidably connected to the pushing frame. A guiding shaft is arranged in the middle of each pushing plate. A swing rod is hinged to the left end of the workbench, and horizontal cross bars are hinged to the front and rear ends of the swing rod. Collar rings are arranged at the right ends of the two cross bars. Two columns matching the collar rings are symmetrically arranged on the front and rear of the transition frame. A sleeve capable of sliding along the axial direction of the cross bar is sleeved outside each cross bar, and a linkage frame rotatably connected to the pushing frame is hinged between the two sleeves. A guiding sliding opening for inserting the guiding shaft is axially opened in the middle of the linkage frame along its own axis.

[0008] By adopting the above technical solution, using the workbench as a bearing component for a large number of square steel pipes, it is possible to synchronously cut a large number of square steel pipes during a single cutting stroke of the circular saw. At the same time, a parallelogram mechanism composed of a swing rod, a linkage frame and two cross bars can be used as a linkage component, so that the pushing plates on the pushing frame can undergo an appropriate lateral displacement as the transition frame rotates. During the subsequent pushing process, the multiple square steel pipes neatly stacked on the workbench will undergo corresponding position changes as the pushing plates displace, until the end faces of the multiple square steel pipes change from a parallel state to a stepped state, so as to make the cutting amount of each square steel pipe as consistent as possible, thereby reducing the material loss of the square steel pipes.

[0009] Optionally, the cross bars are all arranged in the form of threaded rods, and threaded sleeves threadedly connected to the cross bars are rotatably connected inside the two sleeves, and first motors for driving the threaded sleeves to rotate are arranged on the sleeves.

[0010] By adopting the above technical solution, when the first motor operates to drive the threaded sleeve to rotate, the sleeve can axially displace along the cross bar. And using the characteristic of screw self-locking, when the transition frame drives the two cross bars to displace, the central point position of the linkage frame remains stationary, so as to prevent the linkage frame from undergoing a lateral displacement during this process and affecting the normal development of the position adjustment work of the square steel pipes.

[0011] Optionally, a limiting frame is arranged on the workbench, and the two cross bars both penetrate through a strip-shaped opening longitudinally opened in the middle of the limiting frame.

[0012] By adopting the above technical solution, due to the existence of the collar rings and the columns, and the transition frame can be vertically lifted and lowered. When the limiting frame is arranged on the side close to the transition frame, it can provide further limiting and supporting effects for the cross bars, so as to prevent the right end heads of the cross bars from being not effectively supported and bending and deforming during the lifting and lowering process of the transition frame.

[0013] Optionally, the pusher plate is horizontally slidably connected to the pusher frame through a spacing adjustment mechanism, and the spacing adjustment mechanism is used to adjust the spacing between multiple pusher plates.

[0014] Optionally, the spacing adjustment mechanism includes two scissor link assemblies longitudinally arranged on the pusher frame, and a bidirectional lead screw for driving the telescopic movement of itself is arranged inside the scissor link assembly. Rectangular blocks are arranged on the pin shafts of multiple intersection points of the scissor link assembly, and horizontal sliding grooves matching the rectangular blocks are formed on the pusher plates.

[0015] By adopting the above technical solution, taking advantage of the characteristics of the scissor link assembly, and with the cooperation of the rectangular block and the horizontal sliding groove, the spacing between multiple pusher plates can be freely adjusted. At the same time, the cooperation of the rectangular block and the horizontal sliding groove can also make the pusher plate horizontally displace while always maintaining a horizontal state.

[0016] Optionally, clamping plates are arranged on the slider at the frontmost end and the slider at the rearmost end in the scissor link assembly, and a plurality of clamping rollers capable of abutting against the square steel pipe are arranged on the relative inner sides of the two clamping plates.

[0017] By adopting the above technical solution, the two clamping plates are used to limit the positions of multiple square steel pipes neatly stacked on the workbench. At the same time, using the clamping rollers instead of the clamping plates to contact the square steel pipe can reduce the frictional force on the square steel pipe while clamping and limiting all the square steel pipes, reducing the possibility of the square steel pipes becoming loose during the subsequent pushing process, so as not to affect the final cutting quality.

[0018] Optionally, flexible gaskets are arranged between every two horizontally aligned hinge point pin shafts on the scissor link assembly, and the multiple flexible gaskets are arranged at intervals with the multiple pusher plates one by one.

[0019] By adopting the above technical solution, using the flexible gasket as a buffer component between two adjacent square steel pipes can reduce the possibility of the two square steel pipes being damaged by mutual friction during the pushing process, so as not to affect the surface quality of the square steel pipe.

[0020] Optionally, a plurality of guide rollers for supporting the square steel pipe are longitudinally arranged on the workbench.

[0021] By adopting the above technical solution, during the pushing process of the square steel pipe, with the cooperation of the guide rollers, the frictional resistance on the square steel pipe can be reduced, which is beneficial to the pushing work.

[0022] Optionally, a pressing component is arranged at the right end of the workbench for pressing and limiting the square steel pipe during the cutting process.

[0023] Optionally, the pressing component includes a pressing frame arranged at the right end of the workbench, and the pressing frame is located on the left side of the circular saw. A cylinder is arranged on the pressing frame, and a pressing plate capable of pressing the square steel pipe is arranged at the execution end of the cylinder.

[0024] By adopting the above technical solution, when the square steel pipe reaches the cutting station, through the cooperation of the cylinder and the pressing plate, the square steel pipe can be pressed and limited, so that the square steel pipe remains stable during the cutting work, reducing the possibility of the square steel pipe shifting in position, thereby enabling the cutting work to proceed stably.

[0025] To sum up, compared with the prior art, the present application includes at least one of the following beneficial technical effects: 1. When performing end face cutting work on a large number of square steel pipes, by constructing a parallelogram mechanism to adjust the stacking state of the square steel pipes, based on the rotation angle of the circular saw, the cutting amount of each square steel pipe is kept as consistent as possible, reducing material loss while realizing synchronous cutting work on a large number of square steel pipes, thereby improving the overall efficiency of shelf manufacturing work.

[0026] 2. During the feeding process, the distance between the feeding plates can be adjusted according to the size of the square steel pipe to meet the usage requirements of square steel pipes of different sizes. At the same time, the square steel pipe can be limited and protected during the feeding process to prevent the square steel pipe from becoming loose or scratched when the feeding plate pushes the square steel pipe to move.

[0027] 3. After the square steel pipe reaches the cutting station, it can be fixed by pressing and limiting, reducing the possibility of the square steel pipe shifting and misaligning during the cutting process, enabling the subsequent cutting work to be carried out stably. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of a steel frame cutting device for shelf manufacturing in the present application; Figure 2 It is a schematic structural diagram of the lifting frame and the transition frame in the present application; Figure 3 It is a schematic structural diagram of the feeding frame and the swing rod in the present application; Figure 4 It is a schematic structural diagram of the feeding plate and the linkage frame in the present application Figure 1 ; Figure 5 It is a schematic structural diagram of the feeding plate and the linkage frame in the present application Figure 2 ; Figure 6 It is a cross-sectional view of the feeding plate in the present application; Figure 7 It is a cross-sectional view of the sleeve in the present application; Figure 8 It is a schematic structural diagram of the pressing component in the present application.

[0029] Description of reference numerals: 1, workbench; 11, hydraulic cylinder; 12, lifting frame; 13, transition frame; 14, circular saw; 15, servo motor; 2, pusher frame; 21, pusher plate; 22, guide shaft; 3, swing rod; 31, cross bar; 32, collar; 33, column; 34, sleeve; 341, threaded sleeve; 342, first motor; 35, linkage frame; 36, guiding sliding opening; 4, limit frame; 5, spacing adjusting mechanism; 51, scissor link assembly; 52, bidirectional lead screw; 53, rectangular block; 54, transverse sliding groove; 55, clamping plate; 56, clamping roller; 57, flexible gasket; 6, guide roller; 7, pressing assembly; 71, pressing frame; 72, air cylinder; 73, pressing plate. Detailed implementation manners

[0030] For the purpose, technical solutions and advantages of the embodiments of the present application to be clearer, the following will combine the Figures 1 - 8 of the embodiments of the present application to clearly and completely describe the technical solutions of the embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope protected by the present application.

[0031] Referring to Figure 1 and Figure 2 , this embodiment provides a steel frame cutting device for shelf manufacturing, including a workbench 1, a hydraulic cylinder 11, a lifting frame 12, a transition frame 13, a circular saw 14, a servo motor 15, a square steel pipe adjusting mechanism and a feeding mechanism. Among them, the hydraulic cylinder 11 is vertically arranged at the right end of the workbench 1, the lifting frame 12 is arranged at the execution end of the hydraulic cylinder 11, the transition frame 13 is rotatably connected to the lifting frame 12, the circular saw 14 is arranged on the transition frame 13, and the servo motor 15 is arranged on the lifting frame 12 and can drive the transition frame 13 to rotate.

[0032] Among them, referring to Figure 1 , Figure 2 and Figure 3 , the square steel pipe adjusting mechanism includes a pusher frame 2, a pusher plate 21 and a linkage member. The pusher frame 2 is horizontally slidably connected to the workbench 1, and a plurality of pusher plates 21 are arranged and horizontally slidably connected to the pusher frame 2; the linkage member includes a plurality of guide shafts 22, a swing rod 3, two cross bars 31, two collars 32, two columns 33, two sleeves 34, a linkage frame 35 and a guiding sliding opening 36 (referring to Figure 4 and Figure 5),(Multiple guide shafts 22 are respectively arranged in the middle of each pusher plate 21. The swing rod 3 is hinged to the left end of the workbench 1. Two cross bars 31 are horizontally hinged to the front and rear ends of the swing rod 3. Two collar rings 32 are respectively arranged at the right ends of the two cross bars 31. Two columns 33 are symmetrically arranged front and rear on the transition frame 13, and the collar ring 32 can be sleeved outside the column 33. Two sleeves 34 are respectively sleeved outside the two cross bars 31 and can axially slide along the cross bar 31. The linkage frame 35 is horizontally hinged between the two sleeves 34, and the midpoint of the linkage frame 35 is rotationally connected to the midpoint of the pusher frame 2. The guide slide opening 36 is opened in the middle of the linkage frame 35 and can be inserted by the guide shaft 22. The swing rod 3, the linkage frame 35 and the two cross bars 31 can form a parallelogram mechanism, so that the linkage frame 35 always remains parallel to the swing rod 3, and through the cooperation of the collar ring 32 and the column 33, the transition frame 13 will also always remain parallel to the linkage frame 35 and the swing rod 3.)

[0033] Among them, referring to Figure 3 and Figure 7 , the feeding mechanism includes two threaded sleeves 341 and two first motors 342. The two threaded sleeves 341 are respectively rotatably connected inside the two sleeves 34, and the threaded sleeve 341 can be threadedly connected to the cross bar 31 arranged in the form of a threaded rod. The two first motors 342 are respectively arranged on the two sleeves 34, and the first motor 342 can drive the threaded sleeve 341 to rotate by means of gear transmission. When the first motor 342 drives the threaded sleeve 341 to rotate, the sleeve 34 will axially displace along the cross bar 31, so that the linkage frame 35, the pusher frame 2 and the pusher plate 21 will be displaced together, so as to push the square steel pipe to the right to complete feeding.)

[0034] When carrying out the cutting work of square steel pipes, first stack the square steel pipes neatly on the workbench 1, and then through the cooperation of the feeding mechanism, all the pushing plates 21 are displaced together to push the neatly stacked square steel pipes to the right under the circular saw 14. Then, with the cooperation of the hydraulic cylinder 11, the lifting frame 12, the transition frame 13 and the circular saw 14 are moved downward together to perform the conventional horizontal cutting work on all the square steel pipes. In addition, when end face cutting of the square steel pipes is required, the servo motor 15 runs to drive the transition frame 13 to rotate, causing the circular saw 14 to change its angle accordingly. At this time, restricted by the parallelogram mechanism composed of the swing rod 3, the linkage frame 35 and the two cross bars 31, as well as the cooperation of the collar 32 and the column 33, the transition frame 13 can always remain parallel to the linkage frame 35 and the swing rod 3. In this case, the linkage frame 35 will also rotate by the same angle as the transition frame 13, and the guide shaft 22 will displace relatively inside the guide sliding opening 36, prompting the pushing plate 21 to displace horizontally based on the pushing frame 2. When the pushing plate 21 performs the subsequent pushing work on the square steel pipes, the end faces of multiple square steel pipes neatly stacked on the workbench 1 will change from a parallel state to a stepped state. During a single cutting process of the circular saw 14, the cutting amount of each square steel pipe is kept as consistent as possible, improving the cutting work efficiency while reducing material loss.

[0035] Refer to Figure 1 , a limit frame 4 is provided on the workbench 1, and both of the two cross bars 31 penetrate through the strip-shaped openings longitudinally opened in the middle of the limit frame 4.

[0036] The limit frame 4 can provide further limit support for the cross bar 31 on the side close to the transition frame 13, reducing the possibility of the cross bar 31 bending up and down due to the relative displacement of the collar 32 and the column 33.

[0037] Refer to Figure 3 , Figure 4 and Figure 6 , the pushing plate 21 is horizontally slidably connected to the pushing frame 2 through a spacing adjusting mechanism 5, and the spacing adjusting mechanism 5 is used to adjust the spacing between multiple pushing plates 21. The spacing adjusting mechanism 5 includes two scissor link assemblies 51, multiple rectangular blocks 53 and multiple transverse sliding grooves 54. Both of the two scissor link assemblies 51 are longitudinally arranged on the pushing frame 2, and a bidirectional lead screw 52 for driving its own telescoping is provided inside each scissor link assembly 51. Rectangular blocks 53 are provided on the pin shafts of multiple intersection points of the scissor link assemblies 51, and transverse sliding grooves 54 into which the rectangular blocks 53 can be inserted are opened on each pushing plate 21. The cooperation of the rectangular blocks 53 and the transverse sliding grooves 54 enables the pushing plate 21 to displace horizontally based on the pushing frame 2 while maintaining a horizontal state.

[0038] When the bidirectional lead screw 52 rotates to drive the scissor link assembly 51 to extend, the rectangular block 53 on the pin shaft at the central intersection of the scissor link assembly 51 will remain stationary, while the other rectangular blocks 53 will gradually move away from the central rectangular block 53, increasing the distance between the plurality of pusher plates 21 so as to be applicable to square steel pipes of different sizes.

[0039] Among them, referring to Figure 3 , clamping plates 55 are provided on the slider at the frontmost end and the slider at the rearmost end of the scissor link assembly 51, and a plurality of clamping rollers 56 capable of abutting against the square steel pipe are provided on the relative inner sides of the two clamping plates 55.

[0040] When multiple neatly stacked square steel pipes are placed between the two clamping plates 55, the clamping rollers 56 on the two clamping plates 55 can respectively abut against the frontmost square steel pipe and the rearmost square steel pipe, so that the frontmost square steel pipe and the rearmost square steel pipe are subjected to squeezing forces approaching each other, thereby clamping and limiting all the square steel pipes to prevent the square steel pipes from becoming loose during the subsequent pushing process and affecting the final cutting quality.

[0041] Among them, referring to Figure 3 , flexible gaskets 57 are provided between every two horizontally aligned hinge point pin shafts on the scissor link assembly 51, and the plurality of flexible gaskets 57 and the plurality of pusher plates 21 are arranged at intervals one by one.

[0042] When the flexible gaskets 57 and the square steel pipes are separated at intervals in the longitudinal direction, during the subsequent pushing process, the probability of excessive friction and damage between the multiple square steel pipes can be reduced.

[0043] Referring to Figure 1 and Figure 3 , a plurality of guide rollers 6 for supporting the square steel pipe are longitudinally arranged on the workbench 1.

[0044] During the pushing process of the square steel pipe, the guide rollers 6 can provide support for the square steel pipe from the bottom, and at the same time can further reduce the friction force of the square steel pipe during the pushing process.

[0045] Referring to Figure 2 and Figure 8 , a pressing assembly 7 is provided at the right end of the workbench 1 for pressing and limiting the square steel pipe during the cutting process. The pressing assembly 7 includes a pressing frame 71, a cylinder 72 and a pressing plate 73. The pressing frame 71 is arranged at the right end of the workbench 1 and on the left side of the circular saw 14. The cylinder 72 is arranged on the pressing frame 71. The pressing plate 73 is arranged at the execution end of the cylinder 72, and the pressing plate 73 can press the square steel pipe tightly.

[0046] When the square steel pipe is pushed to the cutting station, the cylinder 72 operates to drive the pressing plate 73 to move downward, so that the pressing plate 73 presses the square steel pipe tightly, which can reduce the probability of the square steel pipe shifting and misaligning during the cutting process, thereby ensuring the final cutting quality.

[0047] The implementation principle of a steel frame cutting device for shelf manufacturing in an embodiment of the present application is as follows: When carrying out the cutting work of the square steel pipe, first stack the square steel pipes neatly on the workbench 1, and then the first motor 342 operates to drive the threaded sleeve 341 to rotate. At this time, the sleeve 34 will undergo an axial displacement along the cross bar 31, so that the linkage frame 35, the pushing frame 2 and all the pushing plates 21 will move together, in order to push the neatly stacked square steel pipes to the right below the circular saw 14. Then, with the cooperation of the hydraulic cylinder 11, the lifting frame 12, the transition frame 13 and the circular saw 14 will move downward together, so as to carry out the conventional horizontal cutting work on all the square steel pipes. When the square steel pipe is pushed to the cutting station, the cylinder 72 operates to drive the pressing plate 73 to move downward, so that the pressing plate 73 presses the square steel pipe tightly, which can reduce the probability of the square steel pipe shifting and misaligning during the cutting process, thereby ensuring the final cutting quality.

[0048] In addition, when end face cutting of the square steel pipe is required, the servo motor 15 operates to drive the transition frame 13 to rotate, causing the circular saw 14 to change its angle accordingly. At this time, due to the influence of the parallelogram mechanism composed of the swing rod 3, the linkage frame 35 and the two cross bars 31, as well as the cooperation of the collar 32 and the column 33, the transition frame 13 can always remain parallel to the linkage frame 35 and the swing rod 3. In this case, the linkage frame 35 will also rotate by the same angle as the transition frame 13, and the guide shaft 22 will undergo a relative displacement inside the guide sliding opening 36, prompting the pushing plate 21 to undergo a lateral displacement based on the pushing frame 2. When the pushing plate 21 performs the subsequent pushing work on the square steel pipe, the end faces of multiple square steel pipes neatly stacked on the workbench 1 will change from a parallel state to a stepped state. During a single cutting process of the circular saw 14, the cutting amount of each square steel pipe is kept as consistent as possible, improving the cutting work efficiency while reducing material loss.

[0049] When the bidirectional lead screw 52 rotates to drive the scissor link assembly 51 to extend, the rectangular block 53 on the pin shaft at the central intersection point of the scissor link assembly 51 will remain stationary, while the other rectangular blocks 53 will gradually move away from the central rectangular block 53, causing the distance between multiple pushing plates 21 to gradually increase, so as to be applicable to square steel pipes of different sizes.

[0050] When multiple neatly stacked square steel pipes are placed between two clamping plates 55, the clamping rollers 56 on the two clamping plates 55 can respectively abut against the frontmost square steel pipe and the rearmost square steel pipe, so that the frontmost square steel pipe and the rearmost square steel pipe are subjected to squeezing forces approaching each other, thereby clamping and limiting all the square steel pipes, so as to prevent the square steel pipes from becoming loose during the subsequent pushing process and affecting the final cutting quality. During this process, the flexible gaskets 57 can be spaced apart from the square steel pipes at intervals in the longitudinal direction, reducing the probability of excessive friction and damage between multiple square steel pipes.

[0051] The above is the preferred embodiment of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle described in the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A steel frame cutting device for shelf manufacturing, comprising a workbench (1) and a hydraulic cylinder (11) vertically arranged at the right end thereof, a lifting frame (12) being arranged at the execution end of the hydraulic cylinder (11), and a transition frame (13) for carrying a circular saw (14) and a servo motor (15) for driving the transition frame (13) to rotate being arranged on the lifting frame (12), characterized in that: The workbench (1) is laterally slidably connected to a material pusher frame (2), and the material pusher frame (2) is laterally slidably connected to a plurality of material pusher plates (21) capable of abutting against a square steel pipe, and a guide shaft (22) is arranged in the middle of each material pusher plate (21). A swing rod (3) is hingedly connected to the left end of the workbench (1), and a horizontally arranged cross bar (31) is hingedly connected to the front and rear ends of the swing rod (3), and a sleeve (32) is arranged at the right end of the two cross bars (31). Two columns (33) matching the sleeve (32) are symmetrically arranged in the front and rear on the transition frame (13), and a sleeve (34) capable of sliding axially along the cross bar (31) is sleeved on the outside of each cross bar (31), and a linkage frame (35) rotatably connected to the material pusher frame (2) is hingedly connected between the two sleeves (34), and a guide sliding opening (36) for inserting the guide shaft (22) is opened in the middle of the linkage frame (35) along its own axial direction.

2. A steel frame cutting device for shelf manufacturing according to claim 1, characterized in that: The cross bars (31) are all arranged in the form of threaded bars, and threaded sleeves (341) threadedly connected to the cross bars (31) are rotatably connected inside the two sleeves (34), and the sleeves (34) are all provided with first motors (342) for driving the threaded sleeves (341) to rotate.

3. The steel frame cutting device for shelf manufacturing according to claim 1, characterized in that: A limit frame (4) is arranged on the workbench (1), and the two cross bars (31) both penetrate a strip opening longitudinally opened in the middle of the limit frame (4).

4. The steel frame cutting device for shelf manufacturing according to claim 1, characterized in that: The push plate (21) is slidably connected to the push frame (2) via a spacing adjustment mechanism (5), and the spacing adjustment mechanism (5) is used to adjust the spacing between the plurality of push plates (21).

5. The steel frame cutting device for shelf manufacturing according to claim 4, characterized in that: The spacing adjustment mechanism (5) comprises two scissor-type connecting rod assemblies (51) longitudinally arranged on the pusher frame (2), and a bidirectional lead screw (52) is arranged inside the scissor-type connecting rod assembly (51) for driving the scissor-type connecting rod assembly (51) to extend and retract. Rectangular blocks (53) are arranged on the pins at multiple intersections of the scissor-type connecting rod assembly (51), and transverse sliding grooves (54) matching the rectangular blocks (53) are arranged on the pusher plate (21).

6. The steel frame cutting device for shelf manufacturing according to claim 5, characterized in that: A clamping plate (55) is provided on the slider at the front end and the slider at the rear end of the scissor-type connecting rod assembly (51), and a plurality of clamping rollers (56) capable of abutting against the square steel pipe are provided on the opposite inner side surfaces of the two clamping plates (55).

7. The steel frame cutting device for shelf manufacturing according to claim 5, characterized in that: A flexible gasket (57) is provided between each two laterally aligned hinge point pins on the scissor-type connecting rod assembly (51), and a plurality of flexible gaskets (57) and a plurality of push plates (21) are arranged one by one at intervals.

8. The steel frame cutting device for shelf manufacturing according to claim 1, characterized in that: A plurality of guide rollers (6) for supporting square steel pipes are longitudinally arranged on the workbench (1).

9. The steel frame cutting device for shelf manufacturing according to claim 1, characterized in that: The right end of the workbench (1) is provided with a pressing assembly (7) for pressing and limiting the square steel pipe during the cutting process.

10. A steel frame cutting device for shelf manufacturing according to claim 9, characterized in that: The pressing assembly (7) comprises a pressing frame (71) arranged at the right end of the workbench (1), and the pressing frame (71) is located on the left side of the circular saw (14). A cylinder (72) is arranged on the pressing frame (71), and a pressing plate (73) capable of pressing the square steel pipe is arranged at the execution end of the cylinder (72).

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