An aerated concrete blank cutting device and method of use thereof

Abstract

The application discloses an aerated concrete blank cutting device, which comprises a support main plate connected with a driving assembly and sliding along the moving direction of the blank; a plurality of cutting mechanisms are arranged on the support column in an upper-lower interval mode, each group of the cutting mechanisms is provided with a plurality of support guide wheels rotatably installed in a cutting box, and one of the support guide wheels is connected with a tensioning mechanism for detecting the tension of a cutting line; a winding mechanism is arranged in the cutting box and is provided with a support disc driven to rotate by a second motor and a pair of winding guide wheels rotatably arranged on the support disc, and the cutting line passes through the pair of winding guide wheels; and a controller receives a tension detection signal and controls the actions of the driving assembly, the first motor and the second motor. The aerated concrete blank cutting device has a simple and compact structure, can clamp and wind the broken cutting line, can gradually separate the broken cutting line from the blank, can avoid relative movement between a loading trolley and the cutting mechanism and pulling of the cutting line on the blank, and can prevent the blank from being damaged, and can improve the overall cutting efficiency.

Description

Technical Field

[0001] This invention relates to the field of concrete processing technology, specifically to an aerated concrete blank cutting device and its usage method. Background Technology

[0002] Autoclaved aerated concrete (AAC) is a lightweight porous silicate product made from siliceous materials (sand, fly ash, and silicon-containing tailings, etc.) and calcareous materials (lime, cement) as the main raw materials, with the addition of a foaming agent (aluminum powder), through processes such as batching, mixing, pouring, pre-curing, cutting, autoclaving, and curing.

[0003] After the pre-curing process is completed, the aerated concrete billet is moved to the cutting process by a loading trolley, and the side and top skin are cut and removed by the cutting equipment, and the horizontal cutting is layered. At present, the common method of horizontal cutting is: the taut cutting line is laid across the support frame, and the aerated concrete billet moves through multiple cutting lines to complete the corresponding cutting.

[0004] To prevent the billets from sticking together due to the gap between the upper and lower cuts during the subsequent autoclaving process, some existing technical solutions involve applying wax to the cutting line. Since the cutting is continuous, the cutting line is required to be in a moving cutting state. For example, Chinese utility model patent application number CN202122063479.1: Cutting device for aerated concrete block billets, a servo motor drives the cutting wire to perform counterclockwise uniform reciprocating motion, and the wax and concrete debris are cleaned by a cleaning component.

[0005] However, in actual production, due to the moving cutting line and the presence of hard components in the billet, the cutting line often breaks due to wear and uneven stress. The Chinese invention patent for aerated concrete billet longitudinal cutting device with application number CN202210925479.4 sets a repair cutting device at the front end of the loading trolley (relative to the rear end of the cutting equipment) in the direction of movement. When a cutting line breaks, the control system controls the repair cutting device to move to the same height, so that the cutting can still be automated without stopping the machine. Although it can automatically repair the cutting after the cutting line breaks, the broken cutting line is still located in the billet. When the loading trolley continues to move, the broken cutting line left in the billet will pull on the billet, or the cutting line used for repair will overlap with the broken cutting line, resulting in an uneven cut surface. Therefore, some methods still require stopping the cutting equipment and loading trolley, manually pulling out the broken cutting line, and then repairing it. This method wastes a lot of time, reduces overall efficiency, and seriously affects the automation of cutting without stopping the machine. Summary of the Invention

[0006] The purpose of this invention is to provide an aerated concrete blank cutting device with a simple and compact structure. It can clamp and retract the broken cutting line, gradually pulling it out of the blank, avoiding relative movement between the loading trolley and the cutting mechanism, and preventing damage to the blank caused by the pulling of the cutting line, thereby improving the overall cutting efficiency.

[0007] To achieve the above objectives, an aerated concrete blank cutting device is provided, comprising:

[0008] The main board is supported, connected to the drive assembly, and slides along the direction of the blank movement. Its lower end is provided with a support column arranged perpendicular to the direction of movement.

[0009] The cutting mechanism consists of multiple sets of vertically spaced cutting mechanisms arranged on support columns. Each cutting mechanism has a cutting box located on the support column and multiple support guide wheels rotatably mounted inside the cutting box. The cutting line is wound around the periphery of the multiple support guide wheels and spans between adjacent support columns. One of the support guide wheels is connected to a first motor, and another support guide wheel is connected to a tensioning mechanism for detecting the tension of the cutting line.

[0010] The winding mechanism, located inside the cutting box, has a support plate driven to rotate by a second motor, and a pair of winding guide wheels that rotate on the support plate, with the cutting line passing between the pair of winding guide wheels;

[0011] The controller receives the tension detection signal and controls the operation of the drive assembly, the first motor, and the second motor.

[0012] In some embodiments, a support guide wheel matching the tensioning mechanism is rotatably mounted on a support shaft, and the two sides of the support shaft slide within the strip groove of the cutting box;

[0013] The tensioning mechanism has a support frame rotatably connected to a support shaft on one side, and a pressure sensor for detecting the tension force of the support frame.

[0014] In some embodiments, the support frame has an inner cavity equipped with a spring;

[0015] One end of the adjusting rod is threaded onto the cutting box, and the other end is located inside the cavity and acts on the spring. When the cutting line cuts, the spring is in a compressed state.

[0016] In some embodiments, the supporting motherboard is slidably positioned on the supporting guide rail;

[0017] The drive assembly includes a mobile motor and a transmission shaft fixedly connected to the output end of the mobile motor.

[0018] The drive shaft is threadedly connected to the lugs located on the support main plate.

[0019] In some embodiments, the supporting motherboard is slidably positioned on the supporting guide rail;

[0020] The drive assembly includes a moving motor and a main pulley fixedly connected to the output end of the moving motor. A driven pulley is provided on the other side of the support guide rail. One end of the transmission belt is connected to the support main board, and the other end is first wrapped around the outside of the main pulley and the driven pulley before being connected to the support main board.

[0021] In some embodiments, a cutting mechanism is provided on the front side of the support guide rail in the direction of blank movement;

[0022] The recutting mechanism has a cutting mechanism that drives the up and down movement, and an infrared sensor for identifying the height of the broken cutting line.

[0023] The controller controls the start and stop of the cutting mechanism.

[0024] The present invention also aims to provide a method for using an aerated concrete billet cutting device. By having the main support plate and the loading trolley containing the billet move synchronously and in the same direction, the broken cutting line is clamped and wound up, avoiding manual shutdown. At the same time, the recutting mechanism descends to the same height as the broken cutting line to perform recutting, thereby realizing automated cutting of the aerated concrete billet.

[0025] A method for using an aerated concrete blank cutting device includes the following steps:

[0026] a. The first motor starts, driving the horizontally arranged cutting line to rotate in a cycle. The cutting line passes through the cleaning mechanism to be coated with a wax layer and horizontally cuts the blanks it passes through.

[0027] b. The tensioning mechanism senses the tension of the cutting wire. When the cutting wire breaks due to wear from prolonged use or uneven stress, the controller receives the breakage signal detected by the tensioning mechanism, and controls the first motor to stop driving, the second motor to start, and the drive assembly to start.

[0028] c. The first motor stops driving the cutting line to rotate in a cycle; the second motor drives the support plate to rotate, and a pair of winding guide wheels revolve on the support plate, clamping and winding the broken cutting line passing between them, so that it is gradually pulled out of the blank; at the same time, the drive component drives the support main board and the loading trolley containing the blank to move synchronously and in the same direction, so that the two are in a relatively stationary state.

[0029] d. The recutting mechanism located at the front of the loading trolley in the direction of movement is started. When the broken cutting line is wound up, the infrared sensor on the recutting mechanism identifies the height of the broken cutting line. The cutting line on the recutting mechanism first descends to the same height as the broken cutting line and then rotates in a cycle.

[0030] e. When the support motherboard moves close to the cutting mechanism, the drive component stops driving. At this time, the loading trolley continues to move relative to the support motherboard and the cutting mechanism, and the corresponding cutting lines on the support motherboard and the cutting mechanism complete the continued cutting of the blank.

[0031] Compared with the prior art, this aerated concrete blank cutting device is equipped with a winding mechanism. When the cutting wire breaks due to wear from long-term use or uneven stress, the controller receives the signal from the tensioning mechanism that the cutting wire has broken. The controller then stops the first motor, starts the second motor, and starts the drive assembly. The support main board and the loading trolley move synchronously in the same direction, avoiding damage to the blank caused by the pulling of the cutting wire when the loading trolley and the cutting mechanism move relative to each other. In addition, a pair of winding guide wheels revolve to clamp and wind up the broken cutting wire, gradually pulling it out of the blank, thus avoiding manual operation.

[0032] Because of the addition of a cutting mechanism, when the broken cutting line is being wound up, the cutting line on the addition mechanism first descends to the same height as the broken cutting line. When the support main board moves close to the addition mechanism, the loading trolley continues to move relative to the support main board and the addition mechanism. The corresponding cutting lines on the support main board and the addition mechanism complete the continued cutting of the billet, thus realizing the automated cutting of aerated concrete billets and achieving higher overall efficiency. Attached Figure Description

[0033] Figure 1 This is an overall schematic diagram of Embodiment 1 of the present invention;

[0034] Figure 2 This is a front view of the cutting mechanism in Embodiment 1 of the present invention;

[0035] Figure 3 This is an overall schematic diagram of Embodiment 2 of the present invention;

[0036] Figure 4 This is a top view of the cutting mechanism in Embodiment 2 of the present invention;

[0037] Figure 5 This is a schematic diagram of the winding assembly in this invention;

[0038] Figure 6 This is a schematic diagram of the tensioning component in this invention;

[0039] In the diagram: 11. Support rail, 12. Drive shaft, 13. Support motherboard, 14. Moving motor, 15. Support column;

[0040] 20. Cutting mechanism; 21. Cutting box; 22. Supporting guide wheel; 23. Cutting line; 24. First motor; 25. Strip groove; 26. Support shaft;

[0041] 30. Winding mechanism; 31. Second motor; 32. Support plate; 33. Winding guide wheel; 40. Tensioning mechanism; 41. Support frame; 42. Inner cavity; 43. Spring; 44. Adjusting rod; 45. Pressure sensor; 50. Cleaning mechanism. Detailed Implementation

[0042] The invention will now be further described with reference to the accompanying drawings.

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] like Figures 1 to 5 As shown, this aerated concrete blank cutting device includes:

[0045] The main support 13 is connected to the drive assembly and slides along the direction of blank movement. Its lower end is provided with a support column 15 arranged perpendicular to the direction of movement.

[0046] The cutting mechanism 20 is arranged in multiple sets at intervals on the support column 15. Each cutting mechanism 20 has a cutting box 21 located on the support column 15 and multiple support guide wheels 22 rotatably installed in the cutting box 21. The cutting line 23 is wound around the multiple support guide wheels 22 and spans between adjacent support columns 15. One of the support guide wheels 22 is connected to the first motor 24, and another support guide wheel 22 is connected to the tensioning mechanism 40 for detecting the tension of the cutting line 23.

[0047] The winding mechanism 30 is installed inside the cutting box 21 and has a support disk 32 driven to rotate by a second motor 31, and a pair of winding guide wheels 33 rotatably located on the support disk 32. The cutting line 23 passes between the pair of winding guide wheels 33.

[0048] The controller receives the tension detection signal and controls the operation of the drive assembly, the first motor 24, and the second motor 31.

[0049] Specifically, the cutting device will be described by having a loading trolley carrying the blanks move from left to right.

[0050] The support motherboard 13 is located above the loading trolley containing the blank and is an integral support mechanism. It is connected to the drive assembly to move back and forth. The cutting mechanism 20 can be a conventional structure. It is used to fix the cutting line 23 and rotate it. A cleaning mechanism 50 that acts on the cutting line 23 can be provided in the cutting box 21. The cleaning mechanism 50 is used to remove blank residue on the cutting line 23 and reapply wax layer.

[0051] The winding mechanism 30 is used to wind up the broken cutting wire 23, avoiding the need for manual removal of the cutting wire 23; the support plate 32 may be provided with multiple winding guide rollers 33, and the cutting wire 23 passes through the multiple winding guide rollers 33 in sequence. Under normal non-winding conditions, the cutting wire 23 does not contact the winding guide rollers 33; in addition, the support rollers and winding guide rollers 33 may adopt the same structure (with differences in size), for example, guide grooves for placing the cutting wire 23 are provided on the periphery of the corresponding guide rollers;

[0052] When this aerated concrete blank cutting device is in use, the first motor 24 is started, which drives the cutting line 23 to rotate in a cycle. The cutting line 23 is coated with a wax layer by the cleaning mechanism 50 and performs horizontal cutting on the blank it passes through.

[0053] When the cutting wire 23 breaks due to wear from prolonged use or uneven stress, the tensioning mechanism 40 senses the tension of the cutting wire 23. That is, the tension, which was originally within a certain range, will drop instantly after the breakage. The controller receives the corresponding signal and controls the drive assembly, the first motor 24, and the second motor 31 to operate. Specifically, the controller controls the first motor 24 to stop driving, the second motor 31 to start, and the drive assembly to start. The second motor 31 drives the support plate 32 to rotate, and a pair of winding guide wheels 33 revolve around and clamp and wind up the broken cutting wire 23, gradually pulling it out of the blank, thus avoiding manual operation. At the same time, the controller controls the drive assembly to drive the support main plate 13 and the loading trolley to move synchronously and in the same direction (to the right at the same speed), so that the two are in a relatively stationary state. This avoids the cutting wire 23 pulling on the blank and causing damage to the blank when the loading trolley and the cutting mechanism 20 move relative to each other, thereby improving the overall cutting efficiency.

[0054] Additionally, a supplementary cutting mechanism can be installed on the rear side of the support motherboard 13 (front side of the cutting mechanism 20). When the broken cutting line 23 is being wound up, the supplementary cutting mechanism moves to a suitable position, such as at the same height as the broken cutting line 23. After the cutting line 23 is removed, the controller controls the drive component to move in the opposite direction. The support motherboard 13 drives the unbroken cutting mechanism 20 and the supplementary cutting mechanism to move in the opposite direction (to the left), so that the whole returns to the initial position. Therefore, this device does not require manual intervention to complete the winding and collection of the broken cutting line 23, avoiding damage to the aerated concrete blank caused by the pulling of the broken cutting line 23. Moreover, it can achieve automatic cutting of aerated concrete blank without stopping the machine, which is more efficient.

[0055] Example 1, such as Figure 1 , Figure 2 As shown, in this embodiment, the axis of the support guide wheel 22 in the cutting mechanism 20 is arranged along the direction of blank movement. For example, there are four support guide wheels 22, which are arranged symmetrically in pairs perpendicular to the direction of blank movement. The cutting line 23 is wrapped around the outside of the four support guide wheels 22. At this time, the upper and lower sides of the cutting line 23 are arranged horizontally and both cut the blank. That is, the cutting line 23 is arranged vertically. The winding mechanism 30 is located between the two support guide wheels 22 of one of its support columns 15.

[0056] The first motor 24 is connected to one of its supporting guide wheels 22, and the tensioning mechanism 40 is connected to one of its supporting guide wheels 22. When the cutting line 23 breaks, the same supporting main board 13 moves synchronously and in the same direction with the blank, and the winding mechanism 30 starts to wind up the cutting line 23.

[0057] Example 2, as Figure 3 , Figure 4 As shown, in this embodiment, the axis of the support guide wheel 22 in the cutting mechanism 20 is arranged vertically. For example, there are three support guide wheels 22. One support guide wheel 22 with a larger diameter is located on one side of the support column 15 and is connected to the first motor 24. The other two support guide wheels 22 with smaller diameters are located on the other side of the support column 15, and one of the support guide wheels 22 is connected to the tensioning mechanism 40. The winding mechanism 30 is located between the two support guide wheels 22 with smaller diameters. At this time, the cutting line 23 is arranged horizontally.

[0058] Similarly, when the cutting line 23 breaks, the supporting main board 13 moves synchronously and in the same direction as the blank, and the winding mechanism 30 is activated to wind up the cutting line 23.

[0059] like Figure 6 As shown, in some embodiments, the support guide wheel 22, which matches the tensioning mechanism 40, is rotatably mounted on the support shaft 26, and the two sides of the support shaft 26 are slidably located in the strip groove 25 of the cutting box;

[0060] The tensioning mechanism 40 has a support frame 41 that is rotatably connected to the support shaft 26 on one side, and a pressure sensor 45 that detects the tension force of the support frame 41;

[0061] Specifically, when the cutting line 23 is wound around the outside of the support guide wheel 22, the support shaft 26 slides in the strip groove 25 and is pulled and limited by the support frame 41. The pressure sensor 45 on the support frame 41 detects the tension and feeds the signal back to the controller. When the detected pressure (tension) range is lower than the set minimum range, it indicates that the wire rope has broken.

[0062] like Figure 6As shown, in some embodiments, the support frame 41 has an inner cavity 42 equipped with a spring 43;

[0063] One end of the adjusting rod 44 is threaded onto the cutting box 21, and the other end is located in the inner cavity 42 and acts on the spring 43. When the cutting line 23 cuts, the spring 43 is in a compressed state.

[0064] Specifically, spring 43 is used to adjust the elastic tension. When the cutting line 23 is wrapped around the outside of the support guide wheel 22, the support frame 41 is under tension, causing spring 43 to be in a compressed state. By rotating the adjusting rod 44, the elastic force of spring 43 can be adjusted. For example, when the adjusting rod 44 moves to further compress spring 43, the elastic force of spring 43 will act on the support frame 41, and the support frame 41 will drive the support shaft 26 and the support guide wheel 22 on it to be tensioned.

[0065] like Figure 1 , Figure 3 As shown, in some embodiments, the support motherboard 13 is slidably positioned on the support rail 11;

[0066] The drive assembly includes a moving motor 14 and a transmission shaft 12 fixedly connected to the output end of the moving motor 14.

[0067] The drive shaft 12 is threadedly connected to the lug located on the support main plate 13;

[0068] Specifically, the mobile motor 14 can be a servo motor and is controlled by a controller;

[0069] When the cutting line 23 breaks, the controller controls the moving motor 14 to start. At this time, the moving motor 14 drives the transmission shaft 12 to rotate, so that the ear seat (support main board 13) connected to it by threads moves along the blank moving direction. Preferably, the support main board 13 is matched with the support guide rail 11 through a linear slider. This drive component requires a long transmission shaft 12, that is, it has high precision requirements, in order to avoid the support main board 13 shaking when moving.

[0070] In some embodiments, the support motherboard 13 is slidably positioned on the support guide rail 11;

[0071] The drive assembly includes a moving motor 14 and a main pulley fixedly connected to the output end of the moving motor 14. A driven pulley is provided on the other side of the support guide rail 11. One end of the transmission belt is connected to the support main plate 13, and the other end is first wrapped around the main pulley, then around the outside of the driven pulley, and then connected to the support main plate 13.

[0072] Specifically, the moving motor 14 starts, driving the main pulley, the driven pulley, and the transmission belt to move. The transmission belt causes the supporting main board 13 to move on the supporting guide rail 11.

[0073] In some embodiments, a cutting mechanism is provided on the front side of the support guide rail 11 in the direction of blank movement;

[0074] The recutting mechanism has a cutting mechanism 20 that drives up and down movement, and an infrared sensor for identifying the height of the broken cutting line 23.

[0075] The controller controls the start and stop of the cutting mechanism;

[0076] Specifically, when the cutting line 23 breaks, the tensioning mechanism 40 transmits a signal to the controller. The controller controls the support main board 13 to move synchronously with the billet and controls the action of the supplementary cutting mechanism on the support guide rail 11. That is, the supplementary cutting mechanism is located in front of the movement direction of the billet cutting point. The cutting mechanism 20 of the supplementary cutting mechanism is the same as the cutting mechanism 20 on the support column 15. The difference is that the cutting mechanism 20 of the supplementary cutting mechanism is driven to lift and lower, for example, by driving the cutting mechanism 20 to move up and down through an electric cylinder. When the infrared sensor detects the height of the broken cutting line 23, the cutting mechanism 20 on the supplementary cutting mechanism stops moving, that is, it is at the same height.

[0077] After the blank cutting is completed, the cutting mechanism 20 and the support main board 13 of the repair cutting mechanism return to their initial positions. At this time, they are in the waiting stage for blank feeding. The broken cutting line 23 at the support main board 13 can be repaired manually.

[0078] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

Claims

1. An aerated concrete billet cutting device, comprising: The main support (13) has a support column (15) arranged perpendicular to the direction of movement at its lower end. The cutting mechanism (20) is arranged in multiple sets at intervals on the support column (15). Each cutting mechanism (20) has a cutting box (21) located on the support column (15) and multiple support guide wheels (22) rotatably installed in the cutting box (21). The cutting line (23) is wound around the multiple support guide wheels (22) and spans between adjacent support columns (15). One of the support guide wheels (22) is connected to the first motor (24). A cleaning mechanism (50) is provided inside the cutting box (21) to act on the cutting line (23). The cleaning mechanism (50) is used to remove the blank residue on the cutting line (23) and to reapply the wax layer. Its features are, The support motherboard (13) is connected to the drive assembly and slides along the blank movement direction, and one of the support guide wheels (22) is connected to the tensioning mechanism (40) that detects the tension of the cutting line (23); Also includes: The winding mechanism (30) is set inside the cutting box (21) and has a support disk (32) driven to rotate by a second motor (31) and a pair of winding guide wheels (33) rotating on the support disk (32). The cutting line (23) passes between the pair of winding guide wheels (33). The controller receives the tension detection signal and controls the operation of the drive assembly, the first motor (24), and the second motor (31).

2. The aerated concrete billet cutting device according to claim 1, characterized in that, The support guide wheel (22) matched with the tensioning mechanism (40) is rotatably mounted on the support shaft (26), and the two sides of the support shaft (26) slide within the strip groove (25) of the cutting box (21); The tensioning mechanism (40) has a support frame (41) rotatably connected to the support shaft (26) on one side, and a pressure sensor (45) for detecting the tension force of the support frame (41).

3. The aerated concrete billet cutting device according to claim 2, characterized in that, The support frame (41) has an inner cavity (42) equipped with a spring (43). One end of the adjusting rod (44) is threaded onto the cutting box (21), and the other end is located in the inner cavity (42) and acts on the spring (43). When the cutting line (23) is cutting, the spring (43) is in a compressed state.

4. The aerated concrete billet cutting device according to claim 3, characterized in that, The supporting main board (13) slides on the supporting guide rail (11); The drive assembly includes a moving motor (14) and a transmission shaft (12) fixedly connected to the output end of the moving motor (14). The drive shaft (12) is threadedly connected to the lug on the support plate (13).

5. The aerated concrete billet cutting device according to claim 3, characterized in that, The supporting motherboard (13) slides on the supporting guide rail (11); The drive assembly includes a moving motor (14) and a main pulley fixedly connected to the output end of the moving motor (14). A slave pulley is provided on the other side of the support guide rail (11). One end of the transmission belt is connected to the support main plate (13), and the other end is first wrapped around the outside of the main pulley and the slave pulley before being connected to the support main plate (13).

6. The aerated concrete billet cutting device according to claim 4, characterized in that, The support guide rail (11) is provided with a cutting mechanism on the front side of the billet moving direction; The recutting mechanism has a cutting mechanism (20) that drives up and down movement, and an infrared sensor for identifying the height of the broken cutting line (23); The controller controls the start and stop of the cutting mechanism.

7. A method of using an aerated concrete billet cutting device according to claim 6, characterized in that, Specifically, the following steps are included: a. The first motor (24) starts and drives the horizontally arranged cutting line (23) to rotate in a cycle. The cutting line (23) passes through the cleaning mechanism (50) to be coated with wax and to horizontally cut the blanks that pass through it. b. The tensioning mechanism (40) senses the tension of the cutting wire (23). When the cutting wire (23) breaks due to wear from long-term use or uneven force, the controller receives the breakage signal of the cutting wire (23) detected by the tensioning mechanism (40), controls the first motor (24) to stop driving, the second motor (31) to start, and the drive assembly to start. c. The first motor (24) stops driving the cutting line to rotate in a cycle; the second motor (31) drives the support plate (32) to rotate, and a pair of winding guide wheels (33) revolve on the support plate (32) and clamp and wind up the broken cutting line (23) passing between them, so that it is gradually pulled out of the billet; at the same time, the drive assembly drives the support main plate (13) to move synchronously and in the same direction with the loading trolley containing the billet, so that the two are in a relatively stationary state; d. The recutting mechanism located in front of the loading trolley in the direction of movement is started. When the broken cutting line (23) is wound up, the infrared sensor on the recutting mechanism identifies the height of the broken cutting line (23). The cutting line (23) on the recutting mechanism first descends to the same height as the broken cutting line (23) and then rotates in a cycle. e. When the support motherboard (13) moves close to the cutting mechanism, the drive assembly stops driving. At this time, the loading trolley continues to move relative to the support motherboard (13) and the cutting mechanism, and the corresponding cutting lines (23) on the support motherboard (13) and the cutting mechanism complete the continued cutting of the blank.

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