A sheet metal cutting machine

Abstract

The present invention belongs to the technical field of plate cutting, and in particular, relates to a plate cutting machine, comprising: a machine body; a step-by-step cutting mechanism, which is used to perform the cutting operation in sections so as to release the stress generated during the cutting process, wherein the step-by-step cutting mechanism comprises a lifting plate arranged above the machine body and displaced in the vertical direction, a support plate arranged below the lifting plate, two telescopic rods arranged between the support plate and the lifting plate, a cutting plate slidably connected to the bottom end of the support plate, and a driving assembly arranged between the lifting plate and the support plate. The present invention sets a step-by-step cutting mechanism, so that when cutting the plate, the cutting plate first moves downward with the lifting plate as a reference point, and then the lifting plate as the reference point can move downward under the action of the ratchet block and the ratchet plate, so that the plate is cut in steps, and the cutting depth is gradually increased, so that the plate and the cutting plate have time to release stress after each cutting, thereby reducing the concentration of internal stress.

Description

Technical Field

[0001] The invention belongs to the technical field of plate cutting, and in particular relates to a plate cutting machine. Background Art

[0002] Plate cutting refers to the process of cutting large plates (such as metal, wood, plastic, etc.) into required sizes. During the cutting process, the cutting tool uses high speed and high temperature to exert force on the material, causing the material to break or melt, thereby achieving cutting. For example, a plate cutting machine disclosed in China Publication No. CN117139737B automates the plate positioning, plate pushing, and plate picking and placing processes, which not only saves manpower but also improves the overall efficiency of plate cutting. However, the above plate cutting machine still has the following technical problems when cutting plates:

[0003] When cutting the plate, the tool often cuts the plate continuously, resulting in a large internal stress between the tool and the plate, which not only easily causes the plate to deform, reducing the flatness and smoothness of the cut surface, but also causes the tool to wear and heat accumulation, increasing the frequency of tool replacement and processing costs;

[0004] When cutting the plate, the feed speed of the tool cannot be adjusted according to the temperature of the tool. When the temperature of the tool is high, the higher feed speed causes greater cutting force and friction between the tool and the plate. The tool temperature remains high, which not only softens the tool due to heat and causes damage, but also transmits the temperature of the tool to the plate, causing thermal expansion of the plate, increasing internal stress, and causing deformation or cracks. When the temperature of the tool is low, the feed speed cannot be appropriately increased, resulting in limited cutting efficiency of the plate and reduced processing efficiency. Summary of the invention

[0005] The purpose of the present invention is to address the problems raised in the above-mentioned background technology and provide a plate cutting machine that can cut the plate in steps and gradually increase the cutting depth, so that the plate and the cutting board have time to release stress after each cut, thereby reducing the concentration of internal stress, preventing deformation of the plate, and improving the flatness and smoothness of the cutting edge.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A plate cutting machine, comprising:

[0008] Body;

[0009] A step-by-step cutting mechanism is used to perform the cutting operation in sections so as to release the stress generated during the cutting process. The step-by-step cutting mechanism includes a lifting plate arranged above the machine body and displaced in the vertical direction, a support plate is arranged below the lifting plate, two telescopic rods are arranged between the support plate and the lifting plate, a cutting plate is slidably connected to the bottom end of the support plate, a driving assembly is arranged between the lifting plate and the support plate, and the driving assembly includes a servo motor fixedly connected to the side wall of the lifting plate, and is used to drive the support plate and the cutting plate to move downward with the lifting plate as a reference point, and drive the lifting plate as a reference point to move downward after the cutting plate moves downward;

[0010] The feed speed control mechanism is used to adjust the cutting feed speed of the cutting plate according to the temperature of the cutting plate. The feed speed control mechanism includes a control cavity opened inside the cutting plate, and a sliding rheostat connected in series with the servo motor is arranged inside the control cavity.

[0011] Preferably, the driving assembly also includes two large gears and two small gears rotatably connected to the side walls of the lifting plate, and the two small gears are located between the two large gears, the two small gears mesh with each other, and the two small gears mesh with the large gears at corresponding positions respectively, the upper end of the support plate is fixedly connected to two vertical racks arranged in the vertical direction, the two large gears mesh with the two vertical racks respectively, a transmission rod is rotatably connected to the side wall of the lifting plate, the transmission rod is coaxially fixedly inserted in one of the small gears, a transmission gear is fixedly connected to the transmission rod, and a driving rod fixedly connected to the output end of the servo motor is also rotatably connected to the side wall of the lifting plate, and a first arc rack and a second arc rack are fixedly connected to the driving rod through a connecting rod, and the first arc rack and the second arc rack successively mesh with the two sides of the transmission gear.

[0012] Preferably, the step-by-step cutting mechanism also includes a limit assembly for limiting the displacement of the cutting plate and the lifting plate, the limit assembly includes a ratchet block fixedly connected to the side wall of the lifting plate, the upper end of the body is fixedly connected to an L-shaped plate, the side end of the L-shaped plate is fixedly connected to a top plate, the lower end of the top plate is slidably connected to two ratchet plates that cooperate with both sides of the ratchet block, the lower end of the top plate and the outer side of the ratchet plate are fixedly connected to two fixed blocks, and springs are provided between the ratchet plates and the fixed blocks at corresponding positions.

[0013] Preferably, the sliding rheostat includes a resistance rod fixedly connected between the inner walls on both sides of the control cavity, a sliding plate is slidably connected to the resistance rod, a liquid storage cavity is also provided in the cutting plate, the internal sealing and sliding connection of the liquid storage cavity is connected to a push rod fixed to the sliding plate, and the liquid storage cavity and the push rod are filled with a thermal expansion and contraction medium.

[0014] Preferably, a cooling assembly is provided between the lifting plate and the supporting plate for spraying cooling liquid during the cutting process to prevent the cutting plate and the plate from being overheated. The cooling assembly includes a liquid storage tank fixedly connected to the side wall of the lifting plate, and two symmetrically arranged liquid pumping cylinders are fixedly connected to the side wall of the lifting plate. The interior of each of the liquid pumping cylinders is sealed and slidably connected to a piston block, and the lower wall of each of the piston blocks is fixedly connected to an extension rod, and one end of each of the extension rods extends to the bottom of the liquid pumping cylinder and is fixedly connected to the supporting plate. A liquid pumping tube is connected to each of the liquid pumping cylinders and the liquid storage tank, and a liquid discharge tube is connected to the outer wall of each of the liquid pumping cylinders, and a one-way valve is provided in each of the liquid pumping tubes and the liquid discharge tube.

[0015] Preferably, a reciprocating assembly is provided on both sides of the cutting plate and on the top of the machine body, which is used to drive the cutting plate to move horizontally back and forth during the cutting operation of the cutting plate. The reciprocating assembly includes guide rods fixedly connected to the two side walls of the cutting plate, each of the guide rods is rotatably connected to a guide wheel, and two support rods are fixedly connected to the upper end of the machine body. Each of the support rods has a plurality of triangular guide protrusions in a linear array at one end close to the guide wheel, and each of the support rods has a plurality of trapezoidal guide grooves in a linear array at one end away from the guide wheel, and the plurality of triangular guide protrusions and the plurality of trapezoidal guide grooves are staggered.

[0016] Preferably, a stop block is fixedly connected to the upper end of the machine body, clamping blocks are slidably connected to the upper end of the machine body and at positions on both sides of the stop block, and a hydraulic cylinder for driving the clamping block is fixedly connected to the upper end of the machine body.

[0017] Compared with the existing technology, the advantages of this sheet metal cutting machine are:

[0018] 1. The present invention sets a step-by-step cutting mechanism. When cutting the plate, the servo motor drives the driving rod to rotate, so that the first arc-shaped rack and the second arc-shaped rack on the driving rod are meshed with the transmission gear in turn, so that the cutting plate first moves downward with the lifting plate as a reference point to cut the plate, and then the lifting plate as the reference point can move downward under the action of the ratchet block and the ratchet plate. Therefore, the lifting plate as the reference point can be moved downward, and the cutting operation is performed reciprocatingly. The plate can be cut multiple times in steps, and the cutting depth is gradually increased. The plate and the cutting plate can have time to release stress after each cutting, thereby reducing the concentration of internal stress, preventing deformation of the plate, and improving the flatness and smoothness of the cutting edge. At the same time, the wear and heat accumulation of the cutting plate are reduced, the service life of the cutting plate is extended, and the replacement frequency and processing cost are reduced.

[0019] 2. The present invention sets a feed speed control mechanism. During the cutting process, the feed speed of the cutting plate can be adjusted by the temperature of the cutting plate. When the temperature of the cutting plate is high, the speed of the downward displacement of the cutting plate is reduced. Reducing the feed speed of the cutting plate can reduce cutting force and friction, reduce the rate of friction heat generation, and thus reduce the temperature of the cutting knife, avoid damage to the cutting knife and deformation or cracks of the plate. When the temperature of the cutting plate is low, the speed of rotation of the driving rod is increased, thereby increasing the feed speed of the cutting plate and improving the cutting efficiency of the plate.

[0020] 3. The present invention sets a cooling component. During the cutting process, the cutting plate first moves downward with the lifting plate as a reference point, and then the lifting plate as the reference point moves downward. Therefore, relative displacement can occur between the lifting plate and the support plate, so that the piston block slides back and forth inside the pumping cylinder, thereby continuously pumping coolant to the surrounding side of the cutting plate, cooling the cutting position during the cutting process, avoiding excessive friction heat between the cutting plate and the plate, causing overheating damage to the cutting plate and the plate, and improving the cutting effect of the plate.

[0021] 4. The present invention sets a reciprocating component so that the guide wheels on both sides of the cutting plate intermittently contact the triangular guide protrusions and the trapezoidal guide grooves during the cutting process, so that the cutting plate can slide reciprocatingly horizontally relative to the support plate when it moves downward, and the burrs on the cutting surface are polished. There is no need for subsequent staff to manually polish the cutting surface, so that cutting and deburring operations are carried out simultaneously, reducing the workload of the staff while improving the processing efficiency. In addition, this process does not require the provision of an additional driving source, thereby achieving the purpose of energy saving and efficiency improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0024] Figure 3 is a cross-sectional view of the cutting plate in the present invention;

[0025] Figure 4 yes Figure 3 The enlarged view of point B in the middle;

[0026] Figure 5 It is a schematic diagram of the local structure of the driving component in the present invention;

[0027] Figure 6 It is a schematic diagram of the local structure of the limit assembly in the present invention;

[0028] Figure 7 It is a schematic diagram of the local structure of the cooling component in the present invention.

[0029] In the figure: 1, machine body; 11, stop block; 12, clamping block; 13, hydraulic cylinder; 2, step-by-step cutting mechanism; 21, lifting plate; 22, support plate; 23, telescopic rod; 24, cutting plate; 25, driving assembly; 251, servo motor; 252, large gear; 253, small gear; 254, vertical rack; 255, transmission rod; 256, driving rod; 257, transmission gear; 258, first arc rack; 259, second arc rack; 26, limit assembly; 261, ratchet block; 262, L-shaped plate; 26 3. Top plate; 264. Ratchet plate; 265. Fixed block; 266. Spring; 27. Cooling assembly; 271. Liquid storage tank; 272. Liquid pumping cylinder; 273. Piston block; 274. Extension rod; 275. Liquid pumping tube; 276. Liquid discharge tube; 28. Reciprocating assembly; 281. Guide rod; 282. Guide wheel; 283. Support rod; 284. Triangular guide protrusion; 285. Trapezoidal guide groove; 3. Feed speed control mechanism; 31. Control chamber; 32. Resistance rod; 33. Slide; 34. Liquid storage chamber; 35. Push rod. DETAILED DESCRIPTION

[0030] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0031] Example: Refer to Figures 1 to 7 , a plate cutting machine, comprising:

[0032] Body 1;

[0033] Specifically, a stop block 11 is fixedly connected to the upper end of the body 1, and clamping blocks 12 are slidably connected to the upper end of the body 1 and at positions on both sides of the stop block 11. A hydraulic cylinder 13 for driving the clamping blocks 12 is fixedly connected to the upper end of the body 1. Through the hydraulic cylinder 13, the two clamping blocks 12 can be driven to move closer to or away from each other, thereby achieving a positioning and fixing effect for the plate, avoiding position deviation of the plate during the cutting process, and ensuring the cutting effect. This is an existing mature technology, so it will not be described in detail in this application.

[0034] The step-by-step cutting mechanism 2 is used to perform the cutting operation in sections so as to release the stress generated during the cutting process. The step-by-step cutting mechanism 2 includes a lifting plate 21 disposed above the machine body 1 and displaced in the vertical direction. A support plate 22 is disposed below the lifting plate 21. Two telescopic rods 23 are disposed between the support plate 22 and the lifting plate 21. A cutting plate 24 is slidably connected to the bottom end of the support plate 22. A driving assembly 25 is disposed between the lifting plate 21 and the support plate 22. The driving assembly 25 includes a servo motor 251 fixedly connected to the side wall of the lifting plate 21, and is used to drive the support plate 22 and the cutting plate 24 to move downward with the lifting plate 21 as a reference point, and drive the lifting plate 21 as a reference point to move downward after the cutting plate 24 moves downward;

[0035] Specifically, the driving assembly 25 also includes two large gears 252 and two small gears 253 that are rotatably connected to the side walls of the lifting plate 21, and the two small gears 253 are located between the two large gears 252, the two small gears 253 are meshed with each other, and the two small gears 253 are respectively meshed with the large gears 252 at the corresponding positions, and the upper end of the support plate 22 is fixedly connected to two vertical racks 254 arranged in the vertical direction, and the two large gears 252 are respectively meshed with the two vertical racks 254. A transmission rod 255 is rotatably connected to the wall, and the transmission rod 255 is coaxially fixedly inserted in one of the pinions 253. A transmission gear 257 is fixedly connected to the transmission rod 255. A driving rod 256 fixedly connected to the output end of the servo motor 251 is also rotatably connected to the side wall of the lifting plate 21. The driving rod 256 is fixedly connected to the first arc-shaped rack 258 and the second arc-shaped rack 259 through a connecting rod. The first arc-shaped rack 258 and the second arc-shaped rack 259 are successively meshed with the two sides of the transmission gear 257.

[0036] Specifically, the step-by-step cutting mechanism 2 also includes a limit assembly 26 for limiting the displacement of the cutting plate 24 and the lifting plate 21. The limit assembly 26 includes a ratchet block 261 fixedly connected to the side wall of the lifting plate 21, an L-shaped plate 262 is fixedly connected to the upper end of the body 1, and the side end of the L-shaped plate 262 is fixedly connected to a top plate 263. The lower end of the top plate 263 is slidably connected to two ratchet plates 264 that cooperate with the two sides of the ratchet block 261. Two fixed blocks 265 are fixedly connected to the lower end of the top plate 263 and on the outer side of the ratchet plate 264. Springs 266 are provided between the ratchet plates 264 and the fixed blocks 265 at the corresponding positions.

[0037] Specifically, the lower end of the top plate 263 is fixedly connected to a slide rail, and the ratchet block 261 is fixedly connected to a slider slidably connected to the slide rail, which is used to limit the ratchet block 261, thereby further limiting the displacement of the lifting plate 21 and the cutting plate 24, ensuring that the lifting plate 21 and the cutting plate 24 can only move in the vertical direction, avoiding them from tilting, and ensuring the cutting effect.

[0038] In view of the problem that the cutting operation of the plate by the tool in the prior art is often carried out continuously, resulting in large internal stress between the tool and the plate, which not only easily causes the plate to be deformed, reduces the flatness and smoothness of the cut surface, but also causes the tool to wear and heat accumulation, increases the tool replacement frequency and processing cost, the present invention sets a step-by-step cutting mechanism 2, when the plate is cut, the servo motor 251 drives the driving rod 256 to rotate, so that the first arc rack 258 and the second arc rack 259 on the driving rod 256 are meshed with the transmission gear 257 in turn, thereby producing the following effects:

[0039] When the first arc-shaped rack 258 is meshed with the transmission gear 257, it will drive the transmission gear 257 to rotate counterclockwise, so that the two small gears 253 rotate synchronously. At this time, the lifting plate 21 as the reference point cannot move upward under the action of the ratchet block 261 and the ratchet plate 264. When the ratchet block 261 moves upward relative to the ratchet plate 264, the locking teeth on the ratchet block 261 are inclined upward, and the matching teeth on the ratchet plate 264 are inclined downward, which will hinder the ratchet block 261 from moving upward. Therefore, the support plate 22 can be driven to move downward through the two large gears 252 and the two vertical racks 254, so that the cutting plate 24 moves downward with the lifting plate 21 as the reference point to cut the plate;

[0040] When the second arc-shaped rack 259 meshes with the transmission gear 257, it will drive the transmission gear 257 to rotate clockwise. At this time, the lifting plate 21 as the reference point can be displaced downward under the action of the ratchet block 261 and the ratchet plate 264. When the ratchet block 261 is displaced downward relative to the ratchet plate 264, the two ratchet plates 264 will overcome the elastic force of the spring 266 under the squeezing action of the ratchet block 261, so that the two ratchet plates 264 are separated from each other, and the cutting plate 24 under the support plate 22 abuts against the plate. Therefore, the two large gears 252 can be displaced downward along the vertical rack 254, and the lifting plate 21 as the reference point can be displaced downward;

[0041] Such a reciprocating cutting operation can perform multiple step-by-step cutting on the plate and gradually increase the cutting depth, so that the plate and the cutting plate 24 have time to release stress after each cutting, thereby reducing the concentration of internal stress, preventing deformation of the plate, and improving the flatness and smoothness of the cutting edge. At the same time, it reduces the wear and heat accumulation of the cutting plate 24, extends the service life of the cutting plate 24, and reduces the replacement frequency and processing costs.

[0042] In addition, after the cutting is completed, the staff only needs to manually drive the two ratchet plates 264 away from each other, lift the ratchet block 261 and the lifting plate 21 to the initial height, and then cut the next plate. The lifting process of the ratchet block 261 and the lifting plate 21 can be achieved by a reset spring, and the movement of the two ratchet plates 264 away from each other can be driven by the magnetic repulsion force between the electromagnets, thereby realizing full automation of continuous plate cutting and improving work efficiency.

[0043] The feed speed control mechanism 3 is used to adjust the cutting feed speed of the cutting plate 24 according to the temperature of the cutting plate 24. The feed speed control mechanism 3 includes a control chamber 31 opened inside the cutting plate 24. A sliding rheostat connected in series with the servo motor 251 is arranged inside the control chamber 31.

[0044] Specifically, the sliding rheostat includes a resistance rod 32 fixedly connected between the inner walls on both sides of the control chamber 31, and a sliding plate 33 is slidably connected to the resistance rod 32. A liquid storage chamber 34 is also provided in the cutting plate 24. The internal sealing and sliding connection of the liquid storage chamber 34 is a push rod 35 fixed to the sliding plate 33, and the liquid storage chamber 34 and the push rod 35 are filled with a thermal expansion and contraction medium.

[0045] Specifically, the thermal expansion and contraction medium may be one of diesel and kerosene, or other thermal expansion and contraction mediums such as ethanol and petroleum ether, which are not limited here.

[0046] In view of the problem that the feed speed of the tool cannot be adjusted according to the temperature of the tool in the prior art, not only the tool is softened by heat and damaged, but also the temperature of the tool is transmitted to the plate, causing thermal expansion of the plate, increasing internal stress, and causing deformation or cracks, the present invention sets a feed speed control mechanism 3, and can adjust the feed speed of the cutting plate 24 according to the temperature of the cutting plate 24 during the cutting process. The specific adjustment process is as follows:

[0047] When the temperature of the cutting plate 24 is high, the thermal expansion and contraction medium in the liquid storage chamber 34 expands due to the heat, so that the push rod 35 pushes the slider 33 on the resistor rod 32 to move relatively larger, increasing the resistance of the sliding rheostat, thereby reducing the current of the circuit where the servo motor 251 is located, so that the speed at which the servo motor 251 drives the driving rod 256 to rotate is reduced, thereby reducing the speed at which the servo motor 251 drives the cutting plate 24 to move downward during the driving process, reducing the feed speed of the cutting plate 24, and reducing the cutting force and friction, reducing the friction heat generation rate, thereby reducing the cutter temperature, avoiding damage to the cutting plate 24 and deformation or cracks of the plate;

[0048] When the temperature of the cutting plate 24 is low, the thermal expansion and contraction medium in the liquid storage chamber 34 shrinks, causing the displacement of the slider 33 on the resistor rod 32 to become relatively smaller, thereby reducing the resistance of the sliding rheostat, and increasing the speed at which the servo motor 251 drives the drive rod 256 to rotate, thereby increasing the feed speed of the cutting plate 24 and improving the cutting efficiency of the plate.

[0049] A cooling assembly 27 is provided between the lifting plate 21 and the supporting plate 22, which is used for spraying coolant during the cutting process to prevent the cutting plate 24 and the plate from being overheated. The cooling assembly 27 includes a liquid storage tank 271 fixedly connected to the side wall of the lifting plate 21, and two symmetrically arranged liquid pumping cylinders 272 are fixedly connected to the side wall of the lifting plate 21. The interior of each liquid pumping cylinder 272 is sealed and slidably connected with a piston block 273, and the lower wall of each piston block 273 is fixedly connected with an extension rod 274. One end of each extension rod 274 extends to the bottom of the liquid pumping cylinder 272 and is fixedly connected to the supporting plate 22. A liquid pumping pipe 275 is connected between each liquid pumping cylinder 272 and the liquid storage tank 271, and a liquid discharge pipe 276 is connected on the outer wall of each liquid pumping cylinder 272. A one-way valve is provided in each liquid pumping pipe 275 and the liquid discharge pipe 276.

[0050] Specifically, the bottom end of the drain pipe 276 is connected to an atomizing nozzle for uniformly spraying the coolant to the surrounding side of the cutting position to ensure a cooling effect on the cutting position.

[0051] Specifically, by setting the one-way valve, the piston block 273 can perform reciprocating vertical displacement inside the pumping cylinder 272, and the coolant in the liquid storage tank 271 can only be pumped into the pumping cylinder 272 through the pumping tube 275, and the coolant in the pumping cylinder 272 can only be pumped out through the discharge tube 276, thereby avoiding the backflow of the coolant.

[0052] In order to prevent the cutting plate 24 from generating a large amount of frictional heat during the process of cutting the plate, the present invention provides a cooling component 27. During the cutting process, the cutting plate 24 first moves downward with the lifting plate 21 as a reference point, so that the cutting plate 24 and the lifting plate 21 are separated from each other. Then, the lifting plate 21 as a reference point moves downward, so that the cutting plate 24 and the lifting plate 21 are close to each other. Therefore, the piston block 273 fixed to the support plate 22 above the cutting plate 24 slides back and forth inside the pumping cylinder 272, thereby reciprocatingly pumping the coolant in the liquid storage tank 271 into the pumping cylinder 272, and continuously pumping the coolant in the pumping cylinder 272 to the side of the cutting plate 24, thereby cooling the cutting position during the cutting process, avoiding excessive frictional heat between the cutting plate 24 and the plate, causing overheating damage to the cutting plate 24 and the plate, and improving the cutting effect of the plate.

[0053] A reciprocating assembly 28 is provided on both sides of the cutting plate 24 and above the body 1, which is used to drive the cutting plate 24 to perform horizontal displacement back and forth during the cutting operation of the cutting plate 24. The reciprocating assembly 28 includes a guide rod 281 fixedly connected to the two side walls of the cutting plate 24, and each guide rod 281 is rotatably connected to a guide wheel 282. Two support rods 283 are fixedly connected to the upper end of the body 1, and each support rod 283 has a linear array of multiple triangular guide protrusions 284 at one end close to the guide wheel 282, and each support rod 283 has a linear array of multiple trapezoidal guide grooves 285 at one end away from the guide wheel 282, and the multiple triangular guide protrusions 284 and the multiple trapezoidal guide grooves 285 are staggered.

[0054] Specifically, the cutting position of the lower half of the cutting plate 24 is smoothly set, while the grinding position of the upper half is fixedly provided with a frosting net to ensure the cutting effect of the cutting plate 24 on the plate and the grinding effect of the side wall of the cutting plate 24 on the plate.

[0055] In order to solve the problem in the prior art that burrs are easily generated on the cutting surface after cutting is completed, and manual polishing is required by the staff, the present invention sets a reciprocating assembly 28, and during the cutting process, the cutting plate 24 will move downward in the vertical direction, so that the guide wheels 282 on both sides of the cutting plate 24 intermittently contact the triangular guide protrusions 284 and the trapezoidal guide grooves 285, so that the cutting plate 24 can slide reciprocatingly horizontally relative to the support plate 22 during the downward displacement for cutting operation, so that the cutting plate 24 can polish the burrs on the cutting surface during the cutting process, and there is no need for subsequent staff to manually polish the cutting surface, so that cutting and deburring operations can be carried out simultaneously, reducing the workload of the staff while improving the processing efficiency, and this process does not require the provision of an additional drive source, thereby achieving the purpose of energy saving and efficiency improvement.

[0056] The present invention can be explained by the following operation mode:

[0057] Before cutting, the plate is placed between the stop block 11 and the two clamping blocks 12, and the two clamping blocks 12 are driven to move closer to each other to achieve positioning of the plate and avoid position deviation of the plate during the cutting process;

[0058] During cutting, the driving rod 256 is driven to rotate by the servo motor 251, so that the first arc rack 258 and the second arc rack 259 on the driving rod 256 are meshed with the transmission gear 257 in sequence. When the first arc rack 258 is meshed with the transmission gear 257, the support plate 22 can be driven to move downward through the two large gears 252 and the two vertical racks 254, so that the cutting plate 24 moves downward with the lifting plate 21 as the reference point to cut the plate. When the second arc rack 259 is meshed with the transmission gear 257, the lifting plate 21 as the reference point moves downward under the action of the ratchet block 261 and the ratchet plate 264, so that the two large gears 252 move downward along the vertical rack 254, and the lifting plate 21 as the reference point moves downward. The cutting operation is repeated in this way, and the plate can be cut multiple times in steps, and the cutting depth is gradually increased, so that the plate and the cutting plate 24 have time to release stress after each cutting.

[0059] When the temperature of the cutting plate 24 is high, the thermal expansion and contraction medium in the liquid storage chamber 34 expands, so that the push rod 35 pushes the slider 33 to move a longer distance on the resistor rod 32, increasing the resistance of the sliding rheostat, thereby reducing the current of the circuit where the servo motor 251 is located, so that the rotation speed of the driving rod 256 is reduced, the feed speed of the cutting plate 24 is reduced, and the cutting force and friction are reduced. When the temperature of the cutting plate 24 is low, the thermal expansion and contraction medium in the liquid storage chamber 34 shrinks, so that the slider 33 moves a shorter distance on the resistor rod 32, reducing the resistance of the sliding rheostat, and increasing the rotation speed of the driving rod 256 driven by the servo motor 251, thereby increasing the feed speed of the cutting plate 24 and improving the cutting efficiency of the plate;

[0060] During the cutting process, the lifting plate 21 and the supporting plate 22 reciprocate to move closer to and away from each other, so the coolant in the liquid storage tank 271 can be reciprocally pumped out to the side of the cutting plate 24, thereby cooling the cutting position during the cutting process;

[0061] Since the support plate 22 and the cutting plate 24 move downward during the cutting process, the guide wheels 282 on both sides of the cutting plate 24 intermittently contact the triangular guide protrusions 284 and the trapezoidal guide grooves 285, so that the cutting plate 24 can slide reciprocatingly horizontally relative to the support plate 22 when moving downward for cutting, so that the cutting plate 24 can grind the burrs on the cutting surface during the cutting process.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sheet cutting machine, characterized in that: include: Body (1); The step-by-step cutting mechanism (2) is used for performing a cutting operation in sections so as to release stress generated during the cutting process. The step-by-step cutting mechanism (2) comprises a lifting plate (21) disposed above the machine body (1) and displaced in a vertical direction. A support plate (22) is disposed below the lifting plate (21). Two telescopic rods (23) are disposed between the support plate (22) and the lifting plate (21). A cutting plate (24) is slidably connected to the bottom end of the support plate (22). A driving assembly (25) is disposed between the lifting plate (21) and the support plate (22). The driving assembly (25) comprises a servo motor (251) fixedly connected to a side wall of the lifting plate (21) and used for driving the support plate (22) and the cutting plate (24) to move downward with the lifting plate (21) as a reference point, and driving the lifting plate (21) as a reference point to move downward after the cutting plate (24) moves downward; A feed speed control mechanism (3) is used to adjust the cutting feed speed of the cutting plate (24) according to the temperature of the cutting plate (24), the feed speed control mechanism (3) comprising a control chamber (31) opened inside the cutting plate (24), and a sliding rheostat connected in series with the servo motor (251) is provided inside the control chamber (31).

2. The sheet cutting machine according to claim 1, characterized in that: The driving assembly (25) further comprises two large gears (252) and two small gears (253) rotatably connected to the side wall of the lifting plate (21), and the two small gears (253) are located between the two large gears (252), the two small gears (253) are meshed with each other, and the two small gears (253) are respectively meshed with the large gears (252) at corresponding positions, the upper end of the support plate (22) is fixedly connected to two vertical racks (254) arranged in the vertical direction, the two large gears (252) are respectively meshed with the two vertical racks (254), and the side wall of the lifting plate (21) is provided with a plurality of gears (254) disposed on the support plate (22). A transmission rod (255) is rotatably connected to the wall, the transmission rod (255) is coaxially fixedly inserted into one of the pinions (253), and a transmission gear (257) is fixedly connected to the transmission rod (255). A driving rod (256) fixedly connected to the output end of the servo motor (251) is also rotatably connected to the side wall of the lifting plate (21), and a first arc-shaped rack (258) and a second arc-shaped rack (259) are fixedly connected to the driving rod (256) via a connecting rod, and the first arc-shaped rack (258) and the second arc-shaped rack (259) are successively meshed with the two sides of the transmission gear (257).

3. The sheet cutting machine according to claim 1, characterized in that: The step-by-step cutting mechanism (2) further comprises a limiting assembly (26) for limiting the displacement of the cutting plate (24) and the lifting plate (21), the limiting assembly (26) comprising a ratchet block (261) fixedly connected to the side wall of the lifting plate (21), an L-shaped plate (262) fixedly connected to the upper end of the machine body (1), a top plate (263) fixedly connected to the side end of the L-shaped plate (262), two ratchet plates (264) cooperating with the two sides of the ratchet block (261) slidably connected to the lower end of the top plate (263), two fixed blocks (265) fixedly connected to the lower end of the top plate (263) and on the outer side of the ratchet plate (264), and springs (266) are provided between the ratchet plate (264) and the fixed blocks (265) at corresponding positions.

4. The sheet cutting machine according to claim 1, characterized in that: The sliding rheostat comprises a resistance rod (32) fixedly connected to the inner walls of both sides of the control chamber (31), a sliding plate (33) being slidably connected to the resistance rod (32), a liquid storage chamber (34) being further provided in the cutting plate (24), a push rod (35) fixed to the sliding plate (33) being sealed and slidably connected inside the liquid storage chamber (34), and a thermal expansion and contraction medium being filled between the inside of the liquid storage chamber (34) and the push rod (35).

5. The sheet cutting machine according to claim 1, characterized in that: A cooling assembly (27) is provided between the lifting plate (21) and the supporting plate (22) for spraying cooling liquid during the cutting process to prevent the cutting plate (24) and the plate from being overheated. The cooling assembly (27) comprises a liquid storage tank (271) fixedly connected to the side wall of the lifting plate (21). Two symmetrically arranged liquid pumping cylinders (272) are fixedly connected to the side wall of the lifting plate (21). The interior of each of the liquid pumping cylinders (272) is sealed and slidably connected to a piston block (273). The lower wall of the piston block (273) is fixedly connected to an extension rod (274), one end of each extension rod (274) extends to the bottom of the liquid pumping cylinder (272) and is fixedly connected to the support plate (22), a liquid pumping tube (275) is connected between each liquid pumping cylinder (272) and the liquid storage box (271), the outer wall of each liquid pumping cylinder (272) is connected to a liquid discharge tube (276), and each liquid pumping tube (275) and liquid discharge tube (276) is provided with a one-way valve.

6. The sheet cutting machine according to claim 1, characterized in that: A reciprocating assembly (28) is provided on both sides of the cutting plate (24) and above the machine body (1), and is used to drive the cutting plate (24) to perform horizontal displacement back and forth during the cutting operation of the cutting plate (24). The reciprocating assembly (28) comprises guide rods (281) fixedly connected to the two side walls of the cutting plate (24), each of the guide rods (281) being rotatably connected to a guide wheel (282), and two support rods (283) are fixedly connected to the upper end of the machine body (1), and each of the support rods (283) has a plurality of triangular guide protrusions (284) in a linear array at one end close to the guide wheel (282), and each of the support rods (283) has a plurality of trapezoidal guide grooves (285) in a linear array at one end away from the guide wheel (282), and the plurality of triangular guide protrusions (284) and the plurality of trapezoidal guide grooves (285) are arranged alternately.

7. The sheet cutting machine according to claim 1, characterized in that: The upper end of the machine body (1) is fixedly connected to a stop block (11), the upper end of the machine body (1) and positions on both sides of the stop block (11) are slidably connected to clamping blocks (12), and the upper end of the machine body (1) is fixedly connected to a hydraulic cylinder (13) for driving the clamping block (12).

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