Metal bar cutting circular saw machine

Abstract

This invention relates to the field of bar cutting technology, and more particularly to a circular saw for cutting metal bars. The device includes a main body, a processing table fixedly mounted on the inner side of the main body, a clamping mechanism at the front end of the upper surface of the processing table, a moving plate mounted on the inner top surface of the main body via a front-rear moving mechanism, an H-shaped plate connected to the lower end of the front surface of the moving plate via an elastic mechanism, horizontal guide rods fixedly connected to the two side surfaces of the H-shaped plate, a pressure roller rotatably embedded in the lower inner side of the H-shaped plate, a triangular block fixedly mounted on the lower rear surface of the H-shaped plate, and a connecting frame fixedly mounted on the rear surface of the moving plate. Connecting strips are fixedly connected to the two lower ends of the connecting frame. This invention employs a composite limiting and guiding mechanism with pressure rollers and side rollers, automatically clamping and avoiding obstacles. For the very end section, side rollers are used to push and eliminate safety hazards. The clamping distance is flexibly adjustable and adaptable to various bar specifications.

Description

Technical Field

[0001] This invention relates to the field of bar cutting technology, and more particularly to a circular saw for cutting metal bars. Background Technology

[0002] In the production process, large quantities of solid stainless steel bars need to be cut to length. The circular saw is the core pre-processing equipment for bar cutting. After the bars are cut into sections by the circular saw, they can proceed to subsequent fastener forming processes such as turning, stamping, and tapping. Stainless steel bars have high hardness and smooth surfaces, and the raw materials used for processing are mostly whole long strips. Conventional circular saw feeding and cutting structures are not well adapted to these conditions.

[0003] Traditional circular saws rely solely on the feeding grippers to hold and push the bar stock forward in a single pass. Stainless steel round and straight bars have smooth surfaces and low friction. When the bar stock is cut to the latter half and the remaining length is shortened, the grippers cannot stably hold the workpiece, which can easily cause feeding to stop. This requires manual assistance to push the material, significantly reducing the efficiency of automated processing.

[0004] Furthermore, conventional circular saws have a fixed safety distance between the clamping mechanism and the saw blade. During continuous segmented cutting of bar stock, if the length of the remaining tail section is less than the safety distance between the clamping mechanism and the saw blade, the clamping jaws cannot effectively hold the short tail section, making it impossible to complete the final fixed-length cut. This remaining tail section must be scrapped, resulting in raw material waste. If workers are required to assist in pushing the tail section, manual feeding not only poses operational safety hazards but also increases labor costs. Therefore, this application proposes a circular saw for cutting metal bars. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by proposing a circular saw for cutting metal bars.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a circular saw for cutting metal bars, comprising a main body, a processing table fixedly installed on the inner side of the main body, a clamping mechanism provided at the front end of the upper surface of the processing table, a moving plate installed on the inner top surface of the main body via a front-rear moving mechanism, an H-shaped plate connected to the lower end of the front surface of the moving plate via an elastic mechanism, horizontal guide rods fixedly connected to the two side surfaces of the H-shaped plate, a pressure roller rotatably embedded in the lower inner side of the H-shaped plate, and a triangular block fixedly installed on the lower rear surface of the H-shaped plate. A connecting frame is fixedly installed on the rear surface of the movable plate. Connecting strips are fixedly connected to the two lower ends of the connecting frame. The two connecting strips are symmetrical about the two sides. A movable strip is inserted into the front end of the connecting strip through a reset mechanism. A connecting seat is connected to the front end of the movable strip through an adjustment mechanism. A side roller is rotatably installed on the front end of the lower surface of the connecting seat. A power mechanism is set at the upper end of one of the side rollers. An inclined guide rod is fixedly connected to the upper surface of the movable strip. The inclined guide rod presses against the outer surface of the horizontal guide rod. A transverse cutting mechanism is set at the front end of the processing table. The bar stock is pushed forward and squeezes the triangular block, lifting the pressure roller. The horizontal guide rod moves upward and pushes the inclined guide rod, causing the moving bar to move obliquely backward, which in turn drives the side roller to move obliquely backward in sync.

[0007] Preferably, the clamping mechanism includes a first transverse cylinder fixedly installed on the front side of the upper surface of the processing table, a concave block fixedly installed at the telescopic end of the first transverse cylinder, and chamfers respectively opened at the front and rear corners of the concave block. A second transverse cylinder is fixedly installed on the front side of the lower surface of the processing table through a mounting seat, a clamping block is fixedly installed at the telescopic end of the second transverse cylinder, and a support block is fixedly connected at the front of the processing table and close to the clamping block and the concave block.

[0008] Preferably, the forward and backward moving mechanism includes a first top frame fixedly installed on the top surface inside the main body of the device, an adjusting cylinder fixedly installed at the lower end of the first top frame, and a moving plate fixedly installed at the telescopic end of the adjusting cylinder.

[0009] Preferably, the elastic mechanism includes a fixed plate fixedly installed on the front surface of the movable plate. The fixed plate is slidably inserted into the inner side of the H-shaped plate. Two vertical guide rods are fixedly connected to the inner bottom surface of the H-shaped plate. The vertical guide rods slide through the inner side of the fixed plate. A limiting plate is fixedly connected to the upper ends of the two vertical guide rods. A compression spring is sleeved on the outer surface of one of the vertical guide rods. The compression spring is located between the inner bottom surface of the H-shaped plate and the lower surface of the fixed plate.

[0010] Preferably, the reset mechanism includes a reserved cavity formed inside the connecting strip, the front end of the reserved cavity is connected to a sliding cavity, the rear end of the moving strip is slidably inserted into the inner side of the sliding cavity, a reset spring is fixedly connected to the inner rear end of the reserved cavity, and the front end of the reset spring is fixedly connected to the rear end face of the moving strip.

[0011] Preferably, the adjusting mechanism includes a vertical plate fixedly connected to the front end of the lower surface of the moving bar, an adjusting rod threaded through the inner side of the vertical plate, the front end of the adjusting rod being rotatably connected to the rear end of the connecting seat, an insert being fixedly connected to the rear end face of the connecting seat, and an insertion port being opened on the front end face of the moving bar, the insert being slidably inserted into the inner side of the insertion port.

[0012] Preferably, the transverse cutting mechanism includes a second top frame fixedly installed on the top surface inside the main body of the device. A traveling cylinder is fixedly installed at the lower end of the second top frame. A moving frame is fixedly installed at the telescopic end of the traveling cylinder. A cutting wheel is rotatably installed on the lower inner side of the moving frame. A drive motor is fixedly installed on the rear surface of the moving frame. A transmission wheel is fixedly sleeved on the output shaft of the drive motor and the axle of the cutting wheel. The transmission wheel rotates in cooperation with the moving frame. A transmission belt is sleeved on the surface of the two transmission wheels.

[0013] Preferably, the power mechanism includes a bending bracket fixedly installed on the front end of the upper surface of one of the connecting seats, a servo motor fixedly installed on the upper surface of the bending bracket, and the output shaft of the servo motor fixedly connected to the upper end of the side roller.

[0014] Preferably, the front surface of the main body of the device is provided with a movable door.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention uses a composite limiting and guiding structure of pressure roller and two side rollers to automatically avoid and continuously clamp and limit the bar stock during feeding, solving the problem that the latter half of long stainless steel bars is difficult to push in traditional circular saw machines and requires manual assistance to push the material. This effectively improves the stability of automated bar stock feeding and reduces the frequency of manual intervention. 2. This invention replaces manual feeding with side roller-assisted pushing to complete the tail section feeding and cutting. For the tail section bar stock, there is no need for operators to get close to the saw blade to assist in pushing the material, eliminating the cutting safety hazards caused by manual feeding, while reducing manual operation input and lowering labor costs. 3. This invention adjusts the pushing stroke through the adjusting cylinder and controls the clamping distance of the side rollers through the adjusting mechanism. It has dual-dimensional adjustable capability of forward and backward stroke and clamping distance, and can be adapted to the conveying and cutting of stainless steel bars of different diameters. It solves the problem of poor adaptability of traditional feeding mechanisms and difficulty in processing fastener blanks of multiple specifications, and the equipment has stronger versatility. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a circular saw for cutting metal bars according to the present invention; Figure 2 This is a schematic diagram of the processing table of a circular saw for cutting metal bars according to the present invention; Figure 3 This is a schematic diagram of the concave block and clamping block of a circular saw for cutting metal bars according to the present invention; Figure 4 This is a partial view of the bar feeding process of a circular saw for cutting metal bars according to the present invention; Figure 5 This is a cross-sectional view of the connecting bar of a circular saw for cutting metal bars according to the present invention; Figure 6 This is a schematic diagram of the transverse cutting mechanism of a circular saw for cutting metal bars according to the present invention; Figure 7 This is a schematic diagram of the moving frame of a circular saw for cutting metal bars according to the present invention; Figure 8 This is a schematic diagram showing the positioning of the last section of a circular saw for cutting metal bars according to the present invention.

[0017] The components include: 1. Main body of the device; 2. Movable door; 3. Processing table; 4. Moving plate; 5. Fixed plate; 6. H-shaped plate; 7. Pressure roller; 8. Vertical guide rod; 9. Limiting plate; 10. Compression spring; 11. Horizontal guide rod; 12. Connecting frame; 13. Connecting bar; 14. Sliding cavity; 15. Reserved cavity; 16. Return spring; 17. Moving bar; 18. Insert bar; 19. Insertion port; 20. Vertical connecting plate; 21. Adjusting rod; 22. Connecting seat; 23. 24. Side roller; 25. Inclined guide rod; 26. Concave block; 27. Corner cutter; 28. First transverse cylinder; 29. ​​Clamping block; 30. Second transverse cylinder; 31. Mounting base; 32. Support block; 33. Triangular block; 34. Bending bracket; 35. Servo motor; 36. Moving frame; 37. Cutting wheel; 38. Transmission wheel; 39. Transmission belt; 40. Drive motor; 41. Traveling cylinder; 42. Adjusting cylinder; 43. First top frame; 44. Second top frame. Detailed Implementation

[0018] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0019] like Figures 1-8The illustrated metal bar cutting circular saw includes a main body 1. A processing table 3 is fixedly installed on the inner side of the main body 1. A clamping mechanism is provided at the front end of the upper surface of the processing table 3. A moving plate 4 is installed on the inner top surface of the main body 1 via a front-rear moving mechanism. An H-shaped plate 6 is connected to the lower end of the front surface of the moving plate 4 via an elastic mechanism. Horizontal guide rods 11 are fixedly connected to both sides of the H-shaped plate 6. A pressure roller 7 is rotatably embedded in the lower inner side of the H-shaped plate 6. A triangular block 32 is fixedly installed on the lower rear surface of the H-shaped plate 6. A [missing information - likely a component or component] is fixedly installed on the rear surface of the moving plate 4. A connecting frame 12 has connecting strips 13 fixedly connected to its two lower ends. The two connecting strips 13 are symmetrical about the two sides. A moving strip 17 is inserted into the front end of the connecting strip 13 through a reset mechanism. The front end of the moving strip 17 is connected to a connecting seat 22 through an adjustment mechanism. A side roller 23 is rotatably installed on the front end of the lower surface of the connecting seat 22. A power mechanism is set at the upper end of one of the side rollers 23. An inclined guide rod 24 is fixedly connected to the upper surface of the moving strip 17. The inclined guide rod 24 presses against the outer surface of the horizontal guide rod 11. A transverse cutting mechanism is set at the front end of the processing table 3. The bar stock is pushed forward and squeezes the triangular block 32, lifting the pressure roller 7. The horizontal guide rod 11 moves upward and pushes the inclined guide rod 24, causing the moving bar 17 to move obliquely backward, which in turn drives the side roller 23 to move obliquely backward in sync.

[0020] The clamping mechanism includes a first transverse cylinder 27 fixedly installed on the front side of the upper surface of the processing table 3. A concave block 25 is fixedly installed at the telescopic end of the first transverse cylinder 27. The front and rear corners of the concave block 25 are respectively provided with chamfers 26, which can prevent the side roller 23 from being obstructed when moving diagonally forward. A second transverse cylinder 29 is fixedly installed on the front side of the lower surface of the processing table 3 through a mounting base 30. A clamping block 28 is fixedly installed at the telescopic end of the second transverse cylinder 29. A support block 31 is fixedly connected between the front side of the processing table 3 and the clamping block 28 and the concave block 25. The concave block 25 has a side slit. A gap is reserved between the support block 31 and the front side of the processing table 3 to align with the side slit, allowing the edge of the cutting wheel 36 to extend in. The clamping block 28 is parallel to the side wall of the concave block 25. The side end face of the clamping block 28 and the front end face of the side slit of the concave block 25 are arranged symmetrically from left to right, which can prevent the bar from deflecting during the clamping process.

[0021] The forward and backward moving mechanism includes a first top frame 42 fixedly installed on the top surface inside the main body 1 of the device. An adjusting cylinder 41 is fixedly installed at the lower end of the first top frame 42, and a moving plate 4 is fixedly installed at the telescopic end of the adjusting cylinder 41. The adjusting cylinder 41 is a guide rod electric cylinder with built-in guide rod rail, which has an integrated guiding structure and does not require additional independent guiding structure support, ensuring that the moving plate 4 can move smoothly during the adjustment.

[0022] The elastic mechanism includes a fixed plate 5 fixedly installed on the front surface of the movable plate 4. The fixed plate 5 is slidably inserted into the inner side of the H-shaped plate 6. Two vertical guide rods 8 are fixedly connected to the inner bottom surface of the H-shaped plate 6. The vertical guide rods 8 slide through the inner side of the fixed plate 5. A limiting plate 9 is fixedly connected to the upper ends of the two vertical guide rods 8. A compression spring 10 is sleeved on the outer surface of one of the vertical guide rods 8. The compression spring 10 is located between the inner bottom surface of the H-shaped plate 6 and the lower surface of the fixed plate 5. The vertical guide rods 8 can effectively ensure the coaxiality and stability of the vertical sliding of the fixed plate 5, avoiding deviation and jamming. The limiting plate 9 can limit the sliding stroke of the fixed plate 5 and prevent it from falling out.

[0023] The reset mechanism includes a reserved cavity 15 formed inside the connecting bar 13. The front end of the reserved cavity 15 is connected to a sliding cavity 14. The rear end of the moving bar 17 is slidably inserted into the inner side of the sliding cavity 14. A reset spring 16 is fixedly connected to the inner rear end of the reserved cavity 15. The front end of the reset spring 16 is fixedly connected to the rear end face of the moving bar 17. The sliding cavity 14 forms a regular sliding guide space, which can constrain the movement trajectory of the moving bar 17 and effectively prevent shaking and deviation. The reserved cavity 15 can provide space for the reset spring 16.

[0024] The adjusting mechanism includes a vertical plate 20 fixedly connected to the front end of the lower surface of the moving bar 17. An adjusting rod 21 is threaded through the inner side of the vertical plate 20. The front end of the adjusting rod 21 is rotatably connected to the rear end of the connecting seat 22. An insert 18 is fixedly connected to the rear end face of the connecting seat 22. A socket 19 is opened on the front end face of the moving bar 17, and the insert 18 is slidably inserted into the inner side of the socket 19. By rotating the adjusting rod 21, fine-tuning can be achieved by cooperating with the threaded structure of the vertical plate 20. The insert 18 and the socket 19 cooperate with each other to limit and guide the connecting seat 22, effectively preventing deflection and shaking during adjustment, and ensuring the overall adjusting accuracy and structural stability.

[0025] The transverse cutting mechanism includes a second top frame 43 fixedly installed on the top surface of the main body 1. A travel cylinder 40 is fixedly installed at the lower end of the second top frame 43. A moving frame 35 is fixedly installed at the telescopic end of the travel cylinder 40. A cutting wheel 36 is rotatably installed on the lower inner side of the moving frame 35. A drive motor 39 is fixedly installed on the rear surface of the moving frame 35. Transmission wheels 37 are respectively fixedly sleeved on the output shaft of the drive motor 39 and the axle of the cutting wheel 36. The transmission wheels 37 rotate with the moving frame 35. A transmission belt 38 is sleeved on the surface of the two transmission wheels 37. The belt drive structure stably transmits torque and ensures that the cutting wheel 36 rotates at a uniform speed. The travel cylinder 40 is a hydraulic cylinder with an integrated guide rod and guide rail, which eliminates the need to add an independent guide rail pair to the second top frame 43. This simplifies the assembly process, improves the repeatability and stability of transverse movement, and allows the travel cylinder 40 to drive the moving frame 35 to slide smoothly laterally, accurately adjusting the processing and cutting position of the cutting wheel 36.

[0026] The power mechanism includes a bent bracket 33 fixedly mounted on the front end of the upper surface of one of the connecting seats 22. A servo motor 34 is fixedly mounted on the upper surface of the bent bracket 33, and the output shaft of the servo motor 34 is fixedly connected to the upper end of the side roller 23. The servo motor 34 is raised by the bent bracket 33 and mounted in front of the connecting seat 22. It should be noted that the cutting wheel 36 is driven by the traveling cylinder 40 along with the moving frame 35 to perform transverse cutting feed motion. The installation area of ​​the servo motor 34 is offset from that of the cutting wheel 36, and the movement trajectory does not overlap, so as to avoid mechanical collision and motion interference between the servo motor 34 and the cutting wheel 36, and ensure the continuous and stable operation of the equipment.

[0027] The front surface of the main body 1 of the device is provided with a movable door 2, which is kept closed during daily cutting to prevent the cutting wheel 36 from being directly exposed and causing safety hazards. It can be opened for convenient maintenance and rotation adjustment of the internal adjustment rod 21.

[0028] When the bar stock is conveyed forward, the front end contacts the triangular block 32, pushing the H-shaped plate 6 upward. The H-shaped plate 6 compresses the spring 10 and simultaneously drives the pressure roller 7 to move upward, making room for the front end of the bar stock to pass. During the upward movement of the H-shaped plate 6, the horizontal guide rods 11 on both sides simultaneously push the inclined guide rod 24, driving the inclined guide rod 24 to slide backward along the inclined direction. This causes the moving bar 17, connecting seat 22 and side roller 23 to move outward synchronously. After the two side rollers 23 move away from each other, the front end of the bar stock can be conveyed forward smoothly. The elastic force of the return spring 16 causes the moving bar 17 to push in the inclined forward direction, ensuring that the side roller 23 presses the bar stock tightly. During the continuous pushing of the bar stock, the two side rollers 23 and the upper pressure roller 7 form a multi-directional limiting and guiding constraint, which greatly improves the stability of the feeding and conveying.

[0029] When the bar stock becomes difficult to push after being cut to the rear section, the servo motor 34 drives the side rollers 23 to rotate. The friction of the side rollers 23 pushes the bar stock forward. After the servo motor 34 stops, the cutting process can be performed. When only the tail section of the bar stock remains, the rear end of the bar stock is removed from under the pressure roller 7. The compression spring 10 releases its elasticity to drive the H-shaped plate 6 to move downward. The horizontal guide rods 11 on both sides move downward synchronously with the H-shaped plate 6, no longer supporting the inclined guide rod 24. The servo motor 34 is restarted to transport the bar stock forward to the area between the two side rollers 23. The reset spring 16 then releases its elasticity to push the moving bar 17 to move diagonally forward. The side rollers 23 simultaneously push the tail end of the bar stock forward, ensuring that the remaining bar stock is transported between the concave block 25 and the clamping block 28. The first horizontal cylinder 27 and the second horizontal cylinder 29 extend respectively, driving the concave block 25 and the clamping block 28 to clamp the remaining bar stock. Then, the tail section bar stock cutting operation is completed, effectively reducing tail section bar stock loss and reducing raw material waste.

[0030] The operator pre-controls the extension stroke of the adjusting cylinder 41, driving the moving plate 4 to shift back and forth, thereby adjusting the forward and backward pushing stroke of the side roller 23 when pushing the bar stock, ensuring that the pushing distance matches the processing requirements; rotating the adjusting rod 21 can drive the connecting seat 22 to move obliquely forward and backward, and the insert 18 slides along the inside of the insertion port 19 to adjust the initial position of the side roller 23. The surface of the insert 18 is equipped with scale markings, and the operator can simultaneously adjust the two side rollers 23 by referring to the scale markings, flexibly changing the clamping distance between the two sets of side rollers 23, ensuring the bar stock clamping and conveying effect, and has two multi-dimensional adjustable functions, which can adapt to the conveying operation of various bar stock specifications.

[0031] During the cutting process, the drive motor 39 operates, and the transmission wheel 37 and the transmission belt 38 drive the cutting wheel 36 to rotate. At the same time, the travel cylinder 40 extends, driving the cutting wheel 36 to cut the bar material.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A metal bar sawing machine comprising a device body (1), characterized in that: A processing table (3) is fixedly installed on the inner side of the main body (1) of the device. A clamping mechanism is provided at the front end of the upper surface of the processing table (3). A moving plate (4) is installed on the inner top surface of the main body (1) through a front and rear moving mechanism. An H-shaped plate (6) is connected to the lower end of the front surface of the moving plate (4) through an elastic mechanism. Horizontal guide rods (11) are fixedly connected to both sides of the H-shaped plate (6). A pressure roller (7) is rotatably embedded in the lower inner side of the H-shaped plate (6). A triangular block (32) is fixedly installed on the lower rear surface of the H-shaped plate (6). A connecting frame (12) is fixedly installed on the rear surface of the moving plate (4). 12) The two lower ends are respectively fixedly connected to the connecting strip (13), the two connecting strips (13) are symmetrical about the two sides, the front end of the connecting strip (13) is inserted with the moving strip (17) through the reset mechanism, the front end of the moving strip (17) is connected to the connecting seat (22) through the adjustment mechanism, the front end of the lower surface of the connecting seat (22) is rotatably installed with the side roller (23), the upper end of one of the side rollers (23) is provided with the power mechanism, the upper surface of the moving strip (17) is fixedly connected with the inclined guide rod (24), the inclined guide rod (24) is pressed on the outer surface of the horizontal guide rod (11), and the front end of the processing table (3) is provided with the horizontal cutting mechanism; The bar stock is pushed forward and squeezed against the triangular block (32), which lifts the pressure roller (7). The horizontal guide rod (11) moves upward and pushes against the inclined guide rod (24), causing the moving bar (17) to move obliquely backward, which in turn drives the side roller (23) to move obliquely backward in sync.

2. A metal bar sawing machine according to claim 1, characterized in that: The clamping mechanism includes a first transverse cylinder (27) fixedly installed on the front side of the upper surface of the processing table (3). A concave block (25) is fixedly installed on the telescopic end of the first transverse cylinder (27). Chamfers (26) are respectively opened at the front and rear corners of the concave block (25). A second transverse cylinder (29) is fixedly installed on the front side of the lower surface of the processing table (3) through a mounting seat (30). A clamping block (28) is fixedly installed on the telescopic end of the second transverse cylinder (29). A support block (31) is fixedly connected between the front side of the processing table (3) and the clamping block (28) and the concave block (25).

3. A metal bar sawing machine according to claim 1, characterized in that: The forward and backward moving mechanism includes a first top frame (42) fixedly installed on the top surface inside the main body (1) of the device. An adjusting cylinder (41) is fixedly installed at the lower end of the first top frame (42), and a moving plate (4) is fixedly installed at the telescopic end of the adjusting cylinder (41).

4. A circular saw for cutting metal bars according to claim 1, characterized in that: The elastic mechanism includes a fixed plate (5) fixedly installed on the front surface of the movable plate (4). The fixed plate (5) is slidably inserted into the inner side of the H-shaped plate (6). Two vertical guide rods (8) are fixedly connected to the inner bottom surface of the H-shaped plate (6). The vertical guide rods (8) slide through the inner side of the fixed plate (5). The upper ends of the two vertical guide rods (8) are fixedly connected to a limiting plate (9). A compression spring (10) is sleeved on the outer surface of one of the vertical guide rods (8). The compression spring (10) is located between the inner bottom surface of the H-shaped plate (6) and the lower surface of the fixed plate (5).

5. A circular saw for cutting metal bars according to claim 1, characterized in that: The reset mechanism includes a reserved cavity (15) opened inside the connecting bar (13). The front end of the reserved cavity (15) is connected to a sliding cavity (14). The rear end of the moving bar (17) is slidably inserted into the inner side of the sliding cavity (14). A reset spring (16) is fixedly connected to the inner rear end of the reserved cavity (15). The front end of the reset spring (16) is fixedly connected to the rear end face of the moving bar (17).

6. A circular saw for cutting metal bars according to claim 1, characterized in that: The adjusting mechanism includes a vertical plate (20) fixedly connected to the front end of the lower surface of the moving bar (17). The inner side of the vertical plate (20) is threaded with an adjusting rod (21). The front end of the adjusting rod (21) is rotatably connected to the rear end of the connecting seat (22). The rear end face of the connecting seat (22) is fixedly connected with an insert (18). The front end face of the moving bar (17) is provided with an insertion port (19). The insert (18) slides into the inner side of the insertion port (19).

7. A circular saw for cutting metal bars according to claim 1, characterized in that: The transverse cutting mechanism includes a second top frame (43) fixedly installed on the inner top surface of the main body (1) of the device. A traveling cylinder (40) is fixedly installed at the lower end of the second top frame (43). A moving frame (35) is fixedly installed at the telescopic end of the traveling cylinder (40). A cutting wheel (36) is rotatably installed on the lower inner side of the moving frame (35). A drive motor (39) is fixedly installed on the rear surface of the moving frame (35). A transmission wheel (37) is fixedly sleeved on the output shaft of the drive motor (39) and the wheel axle of the cutting wheel (36). The transmission wheel (37) rotates with the moving frame (35). A transmission belt (38) is sleeved on the surface of the two transmission wheels (37).

8. A circular saw for cutting metal bars according to claim 1, characterized in that: The power mechanism includes a bending bracket (33) fixedly installed on the front end of the upper surface of one of the connecting seats (22). A servo motor (34) is fixedly installed on the upper surface of the bending bracket (33). The output shaft of the servo motor (34) is fixedly connected to the upper end of the side roller (23).

9. A circular saw for cutting metal bars according to claim 1, characterized in that: The front surface of the main body (1) of the device is provided with a movable door (2).

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