four-side trimming press

Abstract

The application discloses a four-side hot cutting machine and particularly relates to the technical field of hot cutting machines, which comprises a bottom plate, support plates fixed at the four corners of the top of the bottom plate, top plates commonly fixed at the top of the two support plates, a horizontal plate commonly fixed at the side of the two top plates close to each other, conveying mechanisms arranged on the two sides of the top of the bottom plate and used for conveying raw materials, four supports fixed at the top of the bottom plate, a processing table commonly fixed at the top of the four supports, and a guiding mechanism arranged above the bottom plate. The lifting mechanism can control the lifting of the backing plate. After the backing plate is lifted, the guiding mechanism guides the blocks on the conveying mechanism to the top of the processing table. Then, the lifting mechanism controls the backing plate to descend, so that the blocks are placed on the processing table. The blocks can be hot cut. After the hot cutting, the lifting mechanism controls the backing plate to ascend again, so that the guiding mechanism guides the hot-cut blocks to the conveying mechanism for continuous conveying. The device can automatically feed and discharge materials.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hot cutting machine, in particular to a four-edge hot cutting machine. BACKGROUND

[0002] The hot cutting machine is a mechanical equipment that uses concentrated heat energy to melt and separate materials. The hot cutting machine is an important machine for industrial part processing. For example, after a PET plate is hot combined into a BLOCK block, the end surfaces of the plates are hot combined with uneven heights. Due to the need of production process, a special equipment is needed to cut off the uneven four edges. Therefore, the hot cutting machine is needed.

[0003] However, the existing hot cutting machine can only heat cut one edge of the block at a time, and a lot of time is spent on positioning before heating to ensure the accuracy of the heat cutting. After one edge is heat cut, the other edge of the block needs to be manually moved to the hot cutting machine for heat cutting, and positioning is still needed at this time, which is low in work efficiency. SUMMARY

[0004] This section aims to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, the abstract and the title. Such simplifications or omissions cannot be used to limit the scope of the present application.

[0005] In view of the above problems of the existing four-edge hot cutting machine, the present application is proposed.

[0006] Therefore, the present application aims to provide a four-edge hot cutting machine, which solves the problem that the existing hot cutting machine can only heat cut one edge of the block at a time, and a lot of time is spent on positioning before heating to ensure the accuracy of the heat cutting. After one edge is heat cut, the other edge of the block needs to be manually moved to the hot cutting machine for heat cutting, and positioning is still needed at this time, which is low in work efficiency.

[0007] In order to solve the above technical problems, the present application provides the following technical scheme: the four-edge hot cutting machine comprises a bottom plate, support plates are fixed at the top of the four corners of the bottom plate, the top of two corresponding support plates is jointly fixed with a top plate, and the side close to each other of the two top plates is jointly fixed with a horizontal plate, conveying mechanisms for conveying raw materials are arranged at the two sides of the top of the bottom plate, four supports are fixed at the top of the bottom plate, and the top of the four supports is jointly fixed with a processing table, a guide mechanism is arranged above the bottom plate, the guide mechanism can guide the raw materials from the conveying mechanisms to the processing table for cutting and guide the cut raw materials from the processing table to the conveying mechanisms for continuous conveying, a lifting mechanism for controlling the lifting of the guide mechanism is arranged below the bottom plate, a positioning mechanism for positioning the raw materials on the processing table is further arranged on the support plates, and the positioning mechanism comprises front and rear positioning assemblies and left and right positioning assemblies.

[0008] Preferably, the front and rear positioning assemblies comprise two vertical plates fixed between the two support plates, the vertical plates are perpendicular to the top plate, a third hydraulic cylinder is fixedly installed on each of the two vertical plates, a second positioning plate is fixed to the extension end of the third hydraulic cylinder, two second limiting rods are fixed to one side of the second positioning plate, and the second limiting rods penetrate through the vertical plates and are in sliding connection with the vertical plates.

[0009] Preferably, the left and right positioning assemblies comprise four first hydraulic cylinders fixed at the top of the bottom plate, the extension end of two corresponding first hydraulic cylinders is jointly fixed with a moving plate, the moving plate is parallel to the top plate, a second hydraulic cylinder is fixedly installed on each of the two moving plates, a first positioning plate is fixed to the extension end of the second hydraulic cylinder, two first limiting rods are fixed to one side of the first positioning plate, the first limiting rods penetrate through the moving plate and are in sliding connection with the moving plate, two guide blocks are fixed to the bottom of the moving plate, a guide rail is fixed to one side of the support plate, and the guide blocks are in sliding fit in the corresponding guide rails.

[0010] Preferably, a fourth hydraulic cylinder is fixedly installed on the horizontal plate, a binding plate is fixed to the extension end of the fourth hydraulic cylinder, two third limiting rods are fixed to the top of the binding plate, the third limiting rods penetrate through the horizontal plate and are in sliding connection with the horizontal plate, a baffle is fixed to the end of the third limiting rod, an elastic member is sleeved on the outside of the third limiting rod, and the two ends of the elastic member abut against the bottom of the baffle and the top of the horizontal plate, respectively.

[0011] Preferably, the guide mechanism comprises a base plate arranged on the top of the base plate, and the base plate is located directly below the processing table, the top of the base plate is fixed with two U-shaped frames through the receiving plate, the top of the two U-shaped frames is fixed with a connecting plate, the two sides of the connecting plate are rotatably connected with first gears, the two first gears are drivingly connected with a first chain, and the first chain can drive the raw material to move when driving.

[0012] Preferably, the driving unit comprises a first motor mounted on the base plate, and the output end of the first motor is fixed with a driving gear, the base plate is fixed with two first bearing seats and two second bearing seats, the two first bearing seats are rotatably connected with a rotating rod through a first bearing, the outer side of the middle part of the rotating rod is fixed with a driven gear, the driving gear and the driven gear are drivingly connected through a second chain, the two ends of the rotating rod are fixed with second gears, the second gears and the first gears are drivingly connected through a third chain, the second bearing seat is rotatably connected with a rotating shaft through a second bearing, and the end of the rotating shaft is fixed with a third gear, the third gear and the first gear are also drivingly connected through the first chain.

[0013] Preferably, the top of the two U-shaped frames is fixed with a first U-shaped plate, and a plurality of rollers are rotatably connected in the first U-shaped plate, the top of the processing table is provided with a notch for the first U-shaped plate and the rollers to pass through, and the two connecting plates are located on the two sides of the processing table, and the distance between the two connecting plates is greater than the width of the processing table.

[0014] It should be noted that when the first chain is conveying the block, the block will also slide on the roller, so that the block can be stably moved above the processing table.

[0015] Preferably, the lifting mechanism comprises a fixed frame fixed to the bottom of the base plate, the bottom of the base plate is rotatably connected with a second lead screw through an embedded bearing, the second lead screw penetrates through the fixed frame and is threadedly connected with the fixed frame, a third motor for controlling the rotation of the second lead screw is fixedly installed on the fixed frame, and a rectangular groove is formed in the bottom of the base plate.

[0016] It should be noted that the first motor, the second motor, the third motor, the second hydraulic cylinder, the third hydraulic cylinder and the fourth hydraulic cylinder are electrically connected with the external power supply, and the elastic member can use a spring or the like.

[0017] Preferably, one side of each of the four supporting plates is fixed with two third bearing seats, the two third bearing seats are rotatably connected with a first lead screw through a third bearing, the outer side of the first lead screw is threadedly connected with a moving block, and the moving blocks adjacent to each other are fixed with an electric heating wire.

[0018] Preferably, the top of the first lead screw is fixed with a rotating shaft, and the outer side of the rotating shaft is fixed with a transmission gear, four transmission gears are commonly driven by a belt, one side of the top of one support plate is fixedly provided with a second motor, the output end of the second motor is fixed with the end of one rotating shaft, one side of the support plate is fixedly provided with a second U-shaped plate, a cylindrical rod is fixedly arranged in the second U-shaped plate, and a cylindrical barrel is rotatably connected to the outer side of the cylindrical rod, and the cylindrical barrel is slidably connected with the belt.

[0019] It should be noted that, due to the arrangement of the cylindrical rod and the cylindrical barrel, the belt is kept in a tight state, so that the belt can well drive the synchronous rotation of the plurality of transmission gears when rotating, and the synchronous rotation of the transmission gears can drive the synchronous rotation of the first lead screw, so that the four sides of the block can be simultaneously hot cut.

[0020] To sum up, the present application includes at least one of the following beneficial effects:

[0021] 1: By the arrangement of the lifting mechanism, the lifting of the backing plate can be controlled, and after the backing plate is lifted, the guide mechanism guides the block on the conveying mechanism to the upper side of the machining table, then the lifting mechanism controls the backing plate to descend, so that the block is placed on the machining table, and the block can be hot cut, and after hot cutting, the lifting mechanism controls the backing plate to rise again, so that the guide mechanism guides the hot-cut block to the conveying mechanism for continuous conveying, so that the device can automatically feed and discharge.

[0022] 2: By the arrangement of the front and rear positioning components and the left and right positioning components, when the block moves to the machining table, the block can be positioned by the front and rear positioning components and the left and right positioning components, and after positioning, the fourth hydraulic cylinder is elongated to drive the restraint plate to move downward, so that the restraint plate fixes the block, thereby facilitating subsequent hot cutting. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described in the following only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0024] Figure 1 The structure diagram of the four-edge hot cutting machine provided by the present application is shown in the figure.

[0025] Figure 2 The partial structure diagram of the four-edge hot cutting machine provided by the present application is shown in the figure.

[0026] Figure 3 The bottom structure diagram of the four-edge hot cutting machine provided by the present application is shown in the figure.

[0027] Figure 4The structure schematic diagram of the four-edge hot cutting machine provided by the present application is shown in Fig. 1. Figure 3 The structure schematic diagram of the four-edge hot cutting machine provided by the present application is shown in Fig. 1.

[0028] Figure 5 The structure schematic diagram of the four-edge hot cutting machine provided by the present application is shown in Fig. 1. Figure 1 The structure schematic diagram of the four-edge hot cutting machine provided by the present application is shown in Fig. 1.

[0029] Figure 6 The structure schematic diagram of the four-edge hot cutting machine provided by the present application is shown in Fig. 1.

[0030] Figure 7 The structure schematic diagram of the four-edge hot cutting machine provided by the present application is shown in Fig. 1.

[0031] BRIEF DESCRIPTION OF DRAWINGS: 1, bottom plate; 2, support plate; 3, top plate; 4, cross plate; 5, support; 6, processing table; 7, pad plate; 8, U-shaped frame; 9, connecting plate; 10, first motor; 11, first bearing seat; 12, rotating rod; 13, second bearing seat; 14, first U-shaped plate; 15, roller; 16, first hydraulic cylinder; 17, moving plate; 18, guide block; 19, guide rail; 20, first positioning plate; 21, first limiting rod; 22, second hydraulic cylinder; 23, vertical plate; 24, second positioning plate; 25, second limiting rod; 26, third hydraulic cylinder; 27, binding plate; 28, fourth hydraulic cylinder; 29, third limiting rod; 30, baffle; 31, elastic member; 32, second motor; 33, second U-shaped plate; 34, cylindrical rod; 35, cylindrical barrel; 36, transmission gear; 37, third bearing seat; 38, first lead screw; 39, belt; 40, conveying mechanism; 41, rectangular groove; 42, fixed frame; 43, third motor; 44, second lead screw; 45, moving block; 46, notch. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0033] The embodiments of the present application disclose a four-edge hot cutting machine.

[0034] The present application provides a method for manufacturing a four-edge hot cutting machine. Figures 1-7The four-edge hot cutting machine shown includes a bottom plate 1, four support plates 2 are fixed at the top corners of the bottom plate 1, the top of two of the support plates 2 are jointly fixed with a top plate 3, and the side of the two top plates 3 close to each other is jointly fixed with a horizontal plate 4, the two sides of the top of the bottom plate 1 are provided with a conveying mechanism 40 for conveying raw materials, the top of the bottom plate 1 is also fixed with four supports 5, and the top of the four supports 5 is jointly fixed with a processing table 6, a guide mechanism is arranged above the bottom plate 1, which can guide the raw materials from the conveying mechanism 40 to the processing table 6 for cutting and can guide the cut raw materials from the processing table 6 to the conveying mechanism 40 for continuous conveying, a lifting mechanism for controlling the lifting of the guide mechanism is arranged below the bottom plate 1, the support plate 2 is also provided with a positioning mechanism for positioning the raw materials on the processing table 6, and the positioning mechanism includes front and rear positioning assemblies and left and right positioning assemblies.

[0035] The guide mechanism includes a backing plate 7 arranged on the top of the bottom plate 1, and the backing plate 7 is located directly below the processing table 6, the top of the backing plate 7 is fixed with two U-shaped frames 8 through a receiving plate, the top of the two U-shaped frames 8 is jointly fixed with a connecting plate 9, the two sides of the connecting plate 9 are rotatably connected with first gears, and the two first gears are drivingly connected with a first chain, and the first chain can drive the raw materials to move when driving, and the backing plate 7 is provided with a driving unit for driving the first chain to drive.

[0036] In order to be able to convey the square block raw materials from the conveying mechanism 40 to the processing table 6, as shown in the figure, Figures 2 to 4As shown, the driving unit comprises a first motor 10 mounted on the pad plate 7, and the output end of the first motor 10 is fixed with a driving gear, the pad plate 7 is fixed with two first bearing seats 11 and two second bearing seats 13, and the two first bearing seats 11 are rotatably connected with a rotating rod 12 through a first bearing, the outer side of the middle part of the rotating rod 12 is fixed with a driven gear, the driving gear and the driven gear are driven through a second chain, the two ends of the rotating rod 12 are both fixed with a second gear, the second gear and the first gear are driven through a third chain, the second bearing seat 13 is rotatably connected with a rotating shaft through a second bearing, and the end of the rotating shaft is fixed with a third gear, the third gear and the first gear are also driven through a first chain, the top of the two U-shaped frames 8 is commonly fixed with a first U-shaped plate 14, and a plurality of rollers 15 are rotatably connected in the first U-shaped plate 14, the top of the processing table 6 is provided with a slot 46 for the first U-shaped plate 14 and the rollers 15 to pass through, the two connecting plates 9 are located on the two sides of the processing table 6, and the distance between the two connecting plates 9 is greater than the width of the processing table 6, and the lifting mechanism comprises a fixed frame 42 fixed to the bottom of the bottom plate 1, the bottom of the pad plate 7 is rotatably connected with a second lead screw 44 through an embedded bearing, and the second lead screw 44 penetrates through the fixed frame 42 and is threadedly connected with the fixed frame 42, and a third motor 43 for controlling the rotation of the second lead screw 44 is fixedly installed on the fixed frame 42, and a rectangular slot 41 is formed in the bottom of the bottom plate 1.

[0037] The block conveyed by the conveying line is conveyed to the conveying mechanism, the third motor 43 is started, the third motor 43 drives the second lead screw 44 to rotate, the second lead screw 44 drives the pad plate 7 to move up when rotating, the pad plate 7 drives the U-shaped frame 8 to move up when moving up, so that the connecting plate 9 and the roller 15 move up, then the first motor 10 is started, the first motor 10 drives the driving gear to rotate, the driving gear drives the driven gear to rotate through the second chain, the driven gear drives the rotating rod 12 to rotate when rotating, the rotating rod 12 drives the second gear to rotate when rotating, the second gear drives the first gear to rotate through the third chain when rotating, the first gear drives the first chain to drive when rotating, the first chain drives the block to move, and the block is moved to the processing table 6, then the first motor 10 is stopped, and then the third motor 43 controls the second lead screw 44 to move reversely, so that the connecting plate 9 moves downward, and the block stays on the processing table 6.

[0038] When the block moves to the processing table 6, Figure 1 , Figure 6 and Figure 7As shown, the front and rear positioning assembly comprises two vertical plates 23 fixed between the two support plates 2, and the vertical plates 23 are perpendicular to the top plate 3, and the two vertical plates 23 are fixedly installed with third hydraulic cylinders 26, and the elongated end of the third hydraulic cylinder 26 is fixed with a second positioning plate 24, one side of the second positioning plate 24 is fixed with two second limiting rods 25, and the second limiting rod 25 penetrates through the vertical plate 23 and is in sliding connection with the vertical plate 23, and the left and right positioning assemblies comprise four first hydraulic cylinders 16 fixed on the top of the bottom plate 1, and the elongated end of the two first hydraulic cylinders 16 arranged correspondingly is fixed with a moving plate 17, and the moving plate 17 is parallel to the top plate 3, and the two moving plates 17 are fixedly installed with second hydraulic cylinders 22, and the elongated end of the second hydraulic cylinder 22 is fixed with a first positioning plate 20, one side of the first positioning plate 20 is fixed with two first limiting rods 21, and the first limiting rod 21 penetrates through the moving plate 17 and is in sliding connection with the moving plate 17, and the bottom of the moving plate 17 is fixed with two guide blocks 18, one side of the support plate 2 is fixed with a guide rail 19, and the guide block 18 is in sliding fit in the corresponding guide rail 19, and the cross plate 4 is fixedly installed with a fourth hydraulic cylinder 28, and the elongated end of the fourth hydraulic cylinder 28 is fixed with a binding plate 27, and the top of the binding plate 27 is fixed with two third limiting rods 29, and the third limiting rod 29 penetrates through the cross plate 4 and is in sliding connection with the cross plate 4, and the end of the third limiting rod 29 is fixed with a baffle 30, and the outer side of the third limiting rod 29 is sleeved with an elastic element 31, and the two ends of the elastic element 31 are respectively in abutment with the bottom of the baffle 30 and the top of the cross plate 4.

[0039] The first hydraulic cylinder 16 is retracted and drives the moving plate 17 to move downward, when the moving plate 17 moves to the required position, the second hydraulic cylinder 22 and the third hydraulic cylinder 26 are simultaneously elongated, the second hydraulic cylinder 22 is elongated to drive the first positioning plate 20 to move, the third hydraulic cylinder 26 is elongated to drive the second positioning plate 24 to move, so that the first positioning plate 20 and the second positioning plate 24 position the square block, after positioning, the second hydraulic cylinder 22 and the third hydraulic cylinder 26 are retracted, the first hydraulic cylinder 16 is elongated to return to the original position, and then the fourth hydraulic cylinder 28 is elongated to drive the binding plate 27 to move downward, so that the binding plate 27 abuts against the square block, that is, the square block is fixed, which is convenient for subsequent hot cutting.

[0040] Further, one side of the four supporting plates 2 is fixed with two third bearing seats 37, and the first lead screw 38 is rotatably connected between the two third bearing seats 37 through a third bearing, and the moving block 45 is threadedly connected outside the first lead screw 38, and the electric heating wire is fixed between the moving blocks 45 adjacent to each other, the top of the first lead screw 38 is fixed with a rotating shaft, the outer side of the rotating shaft is fixed with a transmission gear 36, the four transmission gears 36 are commonly driven by the belt 39, one side of the top of one of the supporting plates 2 is fixedly installed with the second motor 32, the output end of the second motor 32 is fixed with the end of one of the rotating shafts, one side of the supporting plate 2 is fixed with the second U-shaped plate 33, the second U-shaped plate 33 is fixedly installed with the cylindrical rod 34, and the outer side of the cylindrical rod 34 is rotatably connected with the cylindrical barrel 35, and the cylindrical barrel 35 and the belt 39 are slidably connected.

[0041] The second motor 32 is started, the second motor 32 drives the first lead screw 38 to rotate, the first lead screw 38 drives the moving block 45 to move downward when rotating, so that the electric heating wire between the moving blocks 45 is heated and cut, and the second motor 32 is started, which drives one of the transmission gears 36 to rotate, and the transmission gear 36 rotates through the belt 39 to drive the other transmission gears 36 to rotate, so that the other transmission gears 36 drive the corresponding first lead screw 38 to rotate, thereby synchronously moving the plurality of moving blocks 45.

[0042] Finally, the following points should be noted: first, in the description of the present application, it should be pointed out that unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change;

[0043] Secondly: the drawings of the disclosed embodiments of the present application only involve the structures related to the disclosed embodiments of the present application, other structures can refer to the usual design, and in the case of no conflict, the same embodiment and different embodiments of the present application can be combined with each other;

[0044] Finally: the above only describes the preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A four-side trimmer comprising a base plate (1), characterized in that, The four corners of the top of the bottom plate (1) are fixed with support plates (2), the top of two corresponding support plates (2) is fixed with top plates (3) in common, and the side close to each other of the two top plates (3) is fixed with a horizontal plate (4) in common, the two sides of the top of the bottom plate (1) are provided with conveying mechanisms (40) for conveying raw materials, the top of the bottom plate (1) is further fixed with four supports (5), and the top of the four supports (5) is fixed with a processing table (6) in common, a guide mechanism is arranged above the bottom plate (1), the guide mechanism can guide the raw materials from the conveying mechanism (40) to the processing table (6) for cutting and can guide the cut raw materials from the processing table (6) to the conveying mechanism (40) for continuous conveying, a lifting mechanism for controlling the lifting of the guide mechanism is arranged below the bottom plate (1), the support plate (2) is further provided with a positioning mechanism for positioning the raw materials on the processing table (6), and the positioning mechanism comprises front and rear positioning assemblies and left and right positioning assemblies; The left and right positioning assemblies comprise four first hydraulic cylinders (16) fixed to the top of the bottom plate (1), the elongated ends of two corresponding first hydraulic cylinders (16) are fixed with a moving plate (17) in common, the moving plate (17) is parallel to the top plate (3), the two moving plates (17) are fixedly installed with second hydraulic cylinders (22), and the elongated ends of the second hydraulic cylinders (22) are fixed with first positioning plates (20), one side of the first positioning plate (20) is fixed with two first limiting rods (21), the first limiting rods (21) penetrate through the moving plate (17) and are slidably connected with the moving plate (17), the bottom of the moving plate (17) is fixed with two guide blocks (18), one side of the support plate (2) is fixed with a guide rail (19), and the guide block (18) is slidably fitted in the corresponding guide rail (19); The horizontal plate (4) is fixedly installed with a fourth hydraulic cylinder (28), and the elongated end of the fourth hydraulic cylinder (28) is fixed with a restraint plate (27), the top of the restraint plate (27) is fixed with two third limiting rods (29), the third limiting rods (29) penetrate through the horizontal plate (4) and are slidably connected with the horizontal plate (4), the end of the third limiting rod (29) is fixed with a baffle (30), and the outer side of the third limiting rod (29) is sleeved with an elastic element (31), and the two ends of the elastic element (31) abut against the bottom of the baffle (30) and the top of the horizontal plate (4) respectively; The guide mechanism comprises a backing plate (7) arranged on the top of the bottom plate (1), and the backing plate (7) is located directly below the processing table (6), the top of the backing plate (7) is fixed with two U-shaped frames (8) through a receiving plate, the top of the two U-shaped frames (8) is fixed with a connecting plate (9) in common, the two sides of the connecting plate (9) are rotatably connected with first gears, the two first gears are drivingly connected with a first chain, and the first chain can drive the raw materials to move when driving, and the backing plate (7) is provided with a driving unit for driving the first chain to drive.

2. The four-side thermal cutting machine according to claim 1, characterized in that, The front and back positioning assembly comprises two vertical plates (23) fixed between the two support plates (2), the vertical plate (23) is perpendicular to the top plate (3), the third hydraulic cylinder (26) is fixedly installed on the two vertical plates (23), the second positioning plate (24) is fixed to the elongated end of the third hydraulic cylinder (26), and the second positioning plate (24) is fixed with two second limiting rods (25) on one side, and the second limiting rod (25) penetrates through the vertical plate (23) and is in sliding connection with the vertical plate (23).

3. The four-side thermal cutting machine according to claim 2, characterized in that, The driving unit comprises a first motor (10) installed on the pad (7), the output end of the first motor (10) is fixed with a driving gear, the pad (7) is fixed with two first bearing seats (11) and two second bearing seats (13), the rotating rod (12) is rotatably connected between the two first bearing seats (11) through a first bearing, the outer side of the middle part of the rotating rod (12) is fixed with a driven gear, the driving gear and the driven gear are driven by a second chain, the two ends of the rotating rod (12) are fixed with second gears, the second gears and the first gears are driven by a third chain, the rotating shaft is rotatably connected to the second bearing seat (13) through a second bearing, and the end of the rotating shaft is fixed with a third gear, and the third gear and the first gear are also driven by a first chain.

4. The four-side thermal cutting machine according to claim 3, characterized in that, The top of the two U-shaped frames (8) is fixed with a first U-shaped plate (14), and a plurality of rollers (15) are rotatably connected in the first U-shaped plate (14), the top of the processing table (6) is provided with a notch (46) for the first U-shaped plate (14) and the rollers (15), and the two connecting plates (9) are located on the two sides of the processing table (6), and the distance between the two connecting plates (9) is greater than the width of the processing table (6).

5. The four-side thermal cutting machine according to claim 4, characterized in that, The lifting mechanism comprises a fixing frame (42) fixed to the bottom of the bottom plate (1), the bottom of the pad (7) is rotatably connected with a second lead screw (44) through an embedded bearing, the second lead screw (44) penetrates through the fixing frame (42) and is in threaded connection with the fixing frame (42), and the fixing frame (42) is fixedly installed with a third motor (43) for controlling the rotation of the second lead screw (44), and the bottom of the bottom plate (1) is provided with a rectangular groove (41).

6. The four-sides thermal cutting machine according to claim 1, wherein, The side of the four support plates (2) is fixed with two third bearing seats (37), the first lead screw (38) is rotatably connected between the two third bearing seats (37) through a third bearing, the moving block (45) is in threaded connection with the outer side of the first lead screw (38), and the electric heating wires are fixed between the moving blocks (45) adjacent to each other.

7. The four-sides thermal cutting machine according to claim 6, characterized in that, The top of the first screw rod (38) is fixed with a rotating shaft, and the outer side of the rotating shaft is fixed with a transmission gear (36). The four transmission gears (36) are commonly driven with a belt (39). One side of the top of one supporting plate (2) is fixedly installed with a second motor (32). The output end of the second motor (32) is fixed with the end of one rotating shaft. One side of the supporting plate (2) is fixed with a second U-shaped plate (33). The second U-shaped plate (33) is fixedly installed with a cylindrical rod (34) in the inside. The outer side of the cylindrical rod (34) is rotatably connected with a cylindrical barrel (35). The cylindrical barrel (35) and the belt (39) are slidably connected.

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