Base structure of loop wire cutting machine

Abstract

The utility model discloses a loop wire cutting machine base structure, which relates to the technical field of loop wire cutting machines and comprises a loop wire cutting machine shell, a positioning base mechanism is arranged at the bottom of an inner cavity of the loop wire cutting machine shell, a cutting workpiece is arranged above the positioning base mechanism, a diamond sand wire is arranged above the cutting workpiece, and the diamond sand wire is arranged above the cutting workpiece. The positioning base mechanism comprises a containing platform, the containing platform is fixedly installed at the bottom of the inner wall of the loop line cutting machine shell, a workpiece base mechanism is arranged at the center of the top of the containing platform, and front-back positioning mechanisms are arranged on the front side and the back side of the workpiece base mechanism correspondingly. Clamping mechanisms are arranged on the left side and the right side of the workpiece base mechanism correspondingly. Through mutual cooperation of the front positioning mechanism, the rear positioning mechanism, the cylindrical rod and the clamping cylinder, the whole clamping base structure can stably clamp a circular cutting workpiece with an arc-shaped outer wall, the clamping stability is improved, and normal cutting is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of circular wire cutting machine technology, specifically to the base structure of a circular wire cutting machine. Background Technology

[0002] A circular wire cutting machine is a specialized device for precisely cutting ring-shaped materials. It is primarily used for cutting circular or ring-shaped workpieces. Its working principle involves rotating the cutting tool and workpiece, causing the tool to cut along the ring-shaped contour of the workpiece, thus achieving the cutting process. A circular wire cutting machine mainly consists of the following parts: Machine tool: providing stable support and a motion platform; Spindle: driving the rotating cutting tool via a motor; Cutting tool: a key component of the cutting machine, its quality and performance directly affect the cutting effect; Workpiece clamping device: used to fix the workpiece, ensuring its stability and accuracy during the cutting process; Control system: controlling the movement trajectory of the spindle and cutting tool through programming to achieve precise cutting of the workpiece. The existing technology has the following problems:

[0003] Chinese patent document CN216758418U discloses a dual-spindle ring wire cutting machine, relating to the field of material cutting machine technology. It includes a base, a material clamp, a support frame, and a dual-spindle ring wire cutting section. The material clamp includes a material support seat, a clamp slide, a clamp beam, a support base, a clamping plate, and a clamping cylinder. The dual-spindle ring wire cutting section includes a dual-spindle mounting plate, dual cutting wheels, dual drive motors, diamond ring wire, and a water pipe. One cutting wheel is a cutting wheel, and the other is a tensioning wheel, which keeps the ring wire taut throughout the cutting process. The advantages of this invention are that it uses fewer auxiliary cutting wheels, resulting in less wear and fewer consumable parts. Simultaneously, the large wrap angle between the wheel and the ring wire increases friction, reducing wheel slippage and making the wheel more wear-resistant. Therefore, the flatness accuracy of the wheel is easier to control, improving cutting efficiency while better controlling cutting precision.

[0004] While the aforementioned literature suggests that cutting efficiency can be improved, in actual use, the two clamping plates of the overall fixture base structure used for workpiece positioning are both horizontal, which makes it difficult to stably clamp circular workpieces during circular wire cutting. Furthermore, when the bottom curvature of the circular workpiece is too large, the support base also struggles to provide stable support, resulting in low applicability of the overall clamping base structure of the circular wire cutting machine. Utility Model Content

[0005] This utility model provides a base structure for a circular wire cutting machine to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] The base structure of a wire cutting machine includes a wire cutting machine housing. A positioning base mechanism is located at the bottom of the inner cavity of the housing. A workpiece is positioned above the positioning base mechanism, and a diamond wire is positioned above the workpiece. The positioning base mechanism includes a placement platform, which is fixedly installed on the bottom inner wall of the wire cutting machine housing. A workpiece base mechanism is located at the top center of the placement platform. Front and rear positioning mechanisms are located on both the front and rear sides of the workpiece base mechanism, and clamping mechanisms are located on both the left and right sides. The workpiece base mechanism includes a control base plate, which is fixedly installed on top of the placement platform. The control base plate has an adjustment groove on its front side. A positive and negative threaded rod is movably installed on the right side of the inner wall of the adjustment groove. The left end of the positive and negative threaded rod extends to the left side of the control base plate and is fixedly installed with an adjustment knob. The left and right sides of the outer wall of the positive and negative threaded rod are respectively fixedly installed with threaded walls of opposite threads. Adjustment plates are threaded onto the outer walls of both threaded walls. L-shaped adjustment plates are fixedly installed on the front side of both adjustment plates. The bottom of the horizontal part of both L-shaped adjustment plates overlaps with the top of the control base plate. A cylindrical rod is fixedly installed on the top of the horizontal part of both L-shaped adjustment plates. The top of both cylindrical rods overlaps with the bottom of the workpiece being cut.

[0008] A further improvement of this utility model is that: a slide bar is fixedly installed in the middle of the top of the control base plate; both of the front and rear positioning mechanisms include upright plates; the two upright plates are respectively fixedly installed on the front sides of the top of the placement platform and located on the front and rear sides of the control base plate; electric push rods are fixedly installed on the side of the two upright plates away from the control base plate; and the output ends of the two electric push rods respectively penetrate through to the side of the two upright plates near the control base plate and are fixedly installed with front and rear clamping blocks.

[0009] A further improvement of this utility model is that: the bottom of both front and rear clamping blocks is provided with a through groove, and the groove is slidably connected to the slide bar.

[0010] A further improvement of this utility model is that: a clamping drive groove is provided at the bottom of the placement platform, a bidirectional shaft motor is fixedly installed in the middle of the bottom of the inner wall of the clamping drive groove, and threaded rods with opposite threads are fixedly installed on the left and right output shafts of the bidirectional shaft motor, and drive plates are threadedly installed on the outer walls of the two threaded rods. Two C-shaped clamping rods are fixedly installed on the side of the two drive plates away from the bidirectional shaft motor, and the lower horizontal part of the two C-shaped clamping rods on the left and right sides of the placement platform respectively.

[0011] A further improvement of this utility model is that: both clamping mechanisms include a lifting control box; the upper horizontal ends of the two C-shaped clamping rods on the left and right sides are respectively fixedly connected to the side of the two lifting control boxes away from the workpiece base mechanism; each of the two lifting control boxes has a lifting groove on its opposite side; a lifting threaded rod is movably installed on the top of the inner wall of the lifting groove; the bottom end of the lifting threaded rod extends to the bottom of the lifting control box and is fixedly installed with a lifting control knob; a lifting block is threaded on the outer wall of the lifting threaded rod; and an adjustment box is fixedly installed on the opposite side of each of the two lifting blocks.

[0012] A further improvement of this utility model is that: each of the two adjustment boxes has a lifting groove two on its opposite sides, and a positive and negative threaded rod two is movably installed on the top of the inner wall of the lifting groove two. The bottom end of the positive and negative threaded rod two extends through to the bottom of the adjustment box and is fixedly installed with an adjustment knob. The upper and lower sides of the outer wall of the positive and negative threaded rod two are respectively provided with threaded walls two with opposite threads, and the outer walls of the two threaded walls two are threaded with arc-adaptive clamping plates. The end of the arc-adaptive clamping plate away from the lifting control box is fixedly installed with a clamping cylinder, and the opposite sides of the two clamping cylinders on the left and right sides overlap with the left and right sides of the workpiece to be cut.

[0013] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0014] 1. This utility model provides a base structure for a circular cutting machine. Through the cooperation between the front and rear positioning mechanisms, the cylindrical rod, and the clamping cylinder, the overall clamping base structure can stably clamp circular cutting workpieces with arc-shaped outer walls, improve the stability of clamping, and ensure the normal operation of cutting.

[0015] 2. This utility model provides a base structure for a circular wire cutting machine. Through the cooperation of the first and second threaded rods, the L-shaped adjusting plate, the lifting threaded rod, and the second threaded rod, the distance between the two cylindrical rods at the bottom, the distance between the two clamping cylinders on the left and right sides, and the height of the overall adjusting box can be arbitrarily adjusted, which is convenient to adapt to circular cutting workpieces of different sizes and improves the applicability of the base structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the positioning base mechanism of the present invention.

[0018] Figure 3 This is a schematic diagram of the workpiece base mechanism of this utility model;

[0019] Figure 4This is a schematic diagram of the structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of this utility model.

[0021] In the diagram: 1. Wire cutting machine housing; 2. Positioning base mechanism; 21. Placement platform; 211. Clamping drive groove; 212. Bidirectional shaft motor; 213. Threaded rod; 214. Drive plate; 215. C-shaped clamping rod; 22. Workpiece base mechanism; 221. Control base plate; 222. Adjustment slide; 223. Positive and negative threaded rod one; 224. Adjustment knob one; 225. Adjustment plate; 226. L-shaped adjustment plate; 227. Cylindrical rod; 22 8. Sliding bar; 23. Front and rear positioning mechanism; 231. Vertical plate; 232. Electric push rod; 233. Front and rear clamping blocks; 24. Clamping mechanism; 241. Lifting control box; 242. Lifting threaded rod; 243. Lifting control knob; 244. Lifting block; 245. Adjustment box; 246. Two positive and negative threaded rods; 247. Adjustment knob; 248. Curvature adaptable clamping plate; 249. Clamping cylinder; 3. Cutting workpiece; 4. Diamond wire. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] like Figure 1 , Figure 2 , Figure 3As shown, this utility model provides a base structure for a wire cutting machine, including a wire cutting machine housing 1. A positioning base mechanism 2 is provided at the bottom of the inner cavity of the wire cutting machine housing 1. A cutting workpiece 3 is provided above the positioning base mechanism 2, and a diamond wire 4 is provided above the cutting workpiece 3. The positioning base mechanism 2 includes a placement platform 21, which is fixedly installed on the bottom of the inner wall of the wire cutting machine housing 1. A workpiece base mechanism 22 is provided at the top center of the placement platform 21, and front and rear positioning mechanisms are provided on both the front and rear sides of the workpiece base mechanism 22. 23. Clamping mechanisms 24 are provided on both the left and right sides of the workpiece base mechanism 22. The workpiece base mechanism 22 includes a control base plate 221, which is fixedly installed on the top of the placement platform 21. An adjustment groove 222 is provided on the front side of the control base plate 221 to prevent the accumulation of cutting debris. A positive and negative threaded rod 223 is movably installed on the right side of the inner wall of the adjustment groove 222. The left end of the positive and negative threaded rod 223 extends through to the left side of the control base plate 221 and is fixedly installed with an adjustment knob 224. The outer side of the positive and negative threaded rod 223... Two threaded walls with opposite threads are fixedly installed on the left and right sides of the wall, and adjusting plates 225 are threaded onto the outer walls of both threaded walls. L-shaped adjusting plates 226 are fixedly installed on the front sides of both adjusting plates 225. The bottom of the horizontal section of both L-shaped adjusting plates 226 overlaps with the top of the control base plate 221. Cylindrical rods 227 are fixedly installed on the top of the horizontal section of both L-shaped adjusting plates 226. The tops of both cylindrical rods 227 overlap with the bottom of the workpiece 3 being cut. A sliding strip 228 is fixedly installed in the middle of the top of the control base plate 221. Two front and rear... The positioning mechanism 23 includes a vertical plate 231. The two vertical plates 231 are fixedly installed on the front side of the top of the placement platform 21 and on the front and rear sides of the control base plate 221. Electric push rods 232 are fixedly installed on the side of the two vertical plates 231 away from the control base plate 221. The output ends of the two electric push rods 232 pass through to the side of the two vertical plates 231 near the control base plate 221 and are fixedly installed with front and rear clamping blocks 233. The bottom of the two front and rear clamping blocks 233 is provided with a through groove, and the groove is slidably connected to the slide bar 228.

[0024] In use, open the movable door on the front side of the outer casing 1 of the circular wire cutting machine, and then place the workpiece 3 to be cut on the cylindrical rod 227 at the top of the two L-shaped adjusting plates 226 above the control base plate 221. Then, start the two electric push rods 232 to drive the two front and rear clamping blocks 233 to move closer together by sliding on the outer wall of the top slide bar 228 of the control base plate 221 until the front and rear sides of the workpiece 3 are clamped and fixed. At the same time, by rotating the adjustment knob 224 on the left side of the control base plate 221, the positive and negative threaded rod 223 in the adjustment groove 222 can be rotated. The two L-shaped adjusting plates 226 can be controlled to move closer together by the threaded walls of the opposite threads on the left and right sides of the outer wall of the positive and negative threaded rod 223 and the threaded connection of the adjusting plate 225. Conversely, they will separate. Thus, the distance between the two cylindrical rods 227 can be controlled at any time, which is convenient for accommodating the stable placement of the workpiece 3 with different bottom curvatures.

[0025] like Figure 4 As shown, a clamping drive groove 211 is provided at the bottom of the placement platform 21. A bidirectional shaft motor 212 is fixedly installed in the middle of the bottom of the inner wall of the clamping drive groove 211. The output shafts on the left and right sides of the bidirectional shaft motor 212 are respectively fixedly installed with threaded rods 213 with opposite threads. The outer walls of the two threaded rods 213 are threadedly installed with drive plates 214. Two C-shaped clamping rods 215 are fixedly installed on the side of the two drive plates 214 away from the bidirectional shaft motor 212. The lower horizontal part of the two C-shaped clamping rods 215 on the left and right sides of the placement platform 21 respectively extends through to the left and right sides of the placement platform 21.

[0026] Once the workpiece 3 has been placed and clamped in position, the bidirectional shaft motor 212 in the clamping drive slot 211 can be started to drive the threaded rods 213 fixed on the output shafts on the left and right sides to rotate. In conjunction with the two threaded rods 213 with opposite threads, the two drive plates 214 can drive the C-shaped clamping rods 215 to move closer to each other, and when placed, they move away from each other. Thus, the clamping mechanism 24 fixed at the opposite ends of the two C-shaped clamping rods 215 on the left and right sides can clamp and position the left and right sides of the workpiece 3.

[0027] like Figure 5As shown, both clamping mechanisms 24 include a lifting control box 241. The upper horizontal ends of the two C-shaped clamping rods 215 on the left and right sides are fixedly connected to the side of the two lifting control boxes 241 away from the workpiece base mechanism 22. Each of the two lifting control boxes 241 has a lifting groove on its opposite side. A lifting threaded rod 242 is movably installed on the top of the inner wall of the lifting groove. The bottom end of the lifting threaded rod 242 extends through to the bottom of the lifting control box 241 and is fixedly installed with a lifting control knob 243. A lifting block 244 is threaded onto the outer wall of the lifting threaded rod 242. An adjustment box 245 is fixedly installed on the opposite side of each of the two lifting blocks 244. The two adjustment boxes 245 are provided with lifting grooves 2 on their opposite sides, and the inner wall of the lifting groove 2 is movably installed with a positive and negative threaded rod 246. The bottom end of the positive and negative threaded rod 246 extends through to the bottom of the adjustment box 245 and is fixedly installed with an adjustment knob 247. The upper and lower sides of the outer wall of the positive and negative threaded rod 246 are respectively provided with threaded walls 2 with opposite threads, and the outer walls of the two threaded walls 2 are threaded with an arc-adaptive clamping plate 248. The end of the arc-adaptive clamping plate 248 away from the lifting control box 241 is fixedly installed with a clamping cylinder 249. The opposite sides of the two clamping cylinders 249 on the left and right sides respectively overlap with the left and right sides of the cutting workpiece 3.

[0028] During clamping, the clamping cylinders 249 at one end of the two curvature-adaptive clamping plates 248 can adapt to the curved sidewalls of the workpiece 3. At the same time, the lifting control knob 243 can be rotated to drive the lifting threaded rod 242 to rotate, thereby driving the lifting block 244 to move the overall adjustment box 245 upward. Conversely, the lifting control knob 243 can be reversed to control the adjustment box 245 to move downward, thus adapting to workpieces 3 of different heights. This ensures that the two clamping cylinders 249 can always clamp the left and right sides of the workpiece 3. When the curvature of the side of the workpiece 3 is different, the adjusting knob 247 can be rotated to drive the positive and negative threaded rods 246 to rotate. This allows the two clamping cylinders 249 to move closer together by the threaded connection between the opposite threads on the upper and lower sides of the outer wall of the positive and negative threaded rods 246 and the curvature-adaptive clamping plates 248. Conversely, they will separate. This achieves the change of distance between the upper and lower clamping cylinders 249, improving the applicability of clamping the side of the workpiece 3.

[0029] The working principle of the base structure of the circular wire cutting machine will be explained in detail below.

[0030] like Figure 1-5As shown, during use, the movable door on the front side of the ring cutting machine housing 1 is opened, and the workpiece 3 is placed on the cylindrical rod 227 at the top of the two L-shaped adjusting plates 226 above the control base plate 221. Then, the two electric push rods 232 are activated to drive the two front and rear clamping blocks 233 to move closer together by sliding stably against the outer wall of the top slide bar 228 of the control base plate 221 until the front and rear sides of the workpiece 3 are clamped and fixed. At the same time, the adjustment knob 224 on the left side of the control base plate 221 can be rotated to drive the positive and negative threaded rod 223 in the adjustment groove 222 to rotate. The threaded walls of the two L-shaped adjusting plates 226 are connected to the threads of the adjusting plate 225 on the left and right sides of the outer wall of the L-shaped adjusting plate 226 to move closer together, and vice versa. This allows for arbitrary control of the distance between the two cylindrical rods 227, facilitating stable placement of workpieces 3 with different bottom curvatures. After the workpiece 3 is placed and clamped in position, the bidirectional shaft motor 212 in the clamping drive groove 211 can be activated to drive the threaded rods 213 fixed to the output shafts on the left and right sides to rotate. In conjunction with the two threaded rods 213 with opposite threads, the two drive plates 214 can be driven to move the C-shaped clamping rods 215 closer together. When placed, they move away from each other, thus using the clamping mechanism 24 fixed at opposite ends of the two C-shaped clamping rods 215 on the left and right sides to clamp and position the left and right sides of the workpiece 3. During clamping, the clamping cylinders 249 at one end of the two arc-adaptive clamping plates 248 can adapt to the arc-shaped sidewalls of the workpiece 3. Simultaneously, rotating the lifting control knob 243 drives the lifting threaded rod 242 to rotate, thereby driving the lifting block 244 to move the overall adjusting box 245 upwards. Conversely, reversing the lifting control knob 243 controls the adjusting box 245 to move downwards, thus adapting to workpieces 3 of different heights and allowing the two clamping rods to move downwards. The cylinder 249 can always clamp the left and right sides of the workpiece 3. When the side curvature of the workpiece 3 is different, the adjustment knob 247 can be rotated to drive the positive and negative threaded rod 246 to rotate. The threaded wall of the positive and negative threaded rod 246 with opposite threads on the upper and lower sides of the outer wall of the positive and negative threaded rod 246 is connected to the curvature adaptability clamping plate 248 to drive the two clamping cylinders 249 to move closer to each other, and vice versa. This realizes the change of distance between the upper and lower clamping cylinders 249, improves the applicability of side clamping of the workpiece 3. After the workpiece 3 is positioned, the circular wire cutting machine can be started to carry out the cutting work using diamond wire 4.

[0031] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A ring wire cutting machine base structure comprising a ring wire cutting machine housing (1), characterized by: The inner cavity bottom of the ring line cutting machine shell (1) is provided with a positioning base mechanism (2), the upper side of the positioning base mechanism (2) is provided with a cutting workpiece (3), the upper side of the cutting workpiece (3) is provided with a diamond wire (4), the positioning base mechanism (2) comprises a placing platform (21), the placing platform (21) is fixedly installed at the inner wall bottom of the ring line cutting machine shell (1), the top center of the placing platform (21) is provided with a workpiece base mechanism (22), the front and rear sides of the workpiece base mechanism (22) are provided with front and rear positioning mechanisms (23), and the left and right sides of the workpiece base mechanism (22) are provided with clamping mechanisms (24), the workpiece base mechanism (22) comprises a control bottom plate (221), the control bottom plate (221) is fixedly installed on the top of the placing platform (21), the front side of the control bottom plate (221) is provided with an adjusting sliding groove (222), the right side of the inner wall of the adjusting sliding groove (222) is movably installed with a forward and reverse screw rod (223), the left end of the forward and reverse screw rod (223) penetrates to the left side of the control bottom plate (221) and is fixedly installed with an adjusting knob (224), the outer walls of the left and right sides of the forward and reverse screw rod (223) are respectively fixedly installed with screw walls (not marked) with opposite threads, and the outer walls of the two screw walls (not marked) are both threadedly installed with adjusting plates (225), the front sides of the two adjusting plates (225) are both fixedly installed with L-shaped adjusting plates (226), the bottoms of the horizontal parts of the two L-shaped adjusting plates (226) are both overlapped with the top of the control bottom plate (221), the tops of the horizontal parts of the two L-shaped adjusting plates (226) are both fixedly installed with cylindrical rods (227), and the tops of the two cylindrical rods (227) are both overlapped with the bottom of the cutting workpiece (3).

2. The ring saw base structure according to claim 1, characterized in that: The top of the control bottom plate (221) is fixedly installed with a sliding strip (228), the two front and rear positioning mechanisms (23) both comprise a vertical plate (231), the two vertical plates (231) are respectively fixedly installed on the top of the placing platform (21) and located on the left and right sides of the front and rear sides of the control bottom plate (221), the sides away from the control bottom plate (221) of the two vertical plates (231) are both fixedly installed with electric push rods (232), and the output ends of the two electric push rods (232) are respectively penetrated to the sides close to the control bottom plate (221) of the two vertical plates (231) and are fixedly installed with front and rear clamping blocks (233).

3. The ring saw base structure according to claim 2, characterized in that: The bottoms of the two front and rear clamping blocks (233) are both provided with front and rear through sliding grooves, and the sliding grooves are in sliding connection with the sliding strip (228).

4. The ring saw base structure according to claim 1, characterized in that: The bottom of the placing platform (21) is provided with a clamping drive groove (211), the inner wall bottom of the clamping drive groove (211) is fixedly installed with a bidirectional shaft motor (212), the left and right side output shafts of the bidirectional shaft motor (212) are fixedly installed with threaded rods (213) with opposite threads respectively, the outer walls of the two threaded rods (213) are both threadedly installed with drive plates (214), the two drive plates (214) are both fixedly installed with two C-shaped clamping rods (215) in front and back away from the bidirectional shaft motor (212), and the lower horizontal parts of the two C-shaped clamping rods (215) on the left and right sides are respectively penetrated into the left and right sides of the placing platform (21).

5. The ring saw base structure according to claim 4, characterized in that: The two clamping mechanisms (24) both include lifting control boxes (241), the upper horizontal parts of the two C-shaped clamping rods (215) on the left and right sides are respectively fixedly connected with the sides of the two lifting control boxes (241) away from the workpiece base mechanism (22), the opposite surfaces of the two lifting control boxes (241) are both provided with lifting grooves one, the inner wall top of the lifting groove one is movably installed with a lifting threaded rod (242), the bottom end of the lifting threaded rod (242) is penetrated into the bottom of the lifting control box (241) and is fixedly installed with a lifting control knob (243), the outer wall of the lifting threaded rod (242) is threadedly installed with a lifting block (244), and the opposite surfaces of the two lifting blocks (244) are both fixedly installed with adjusting boxes (245).

6. The ring saw base structure according to claim 5, characterized in that: The opposite surfaces of the two adjusting boxes (245) are both provided with lifting grooves two, the inner wall top of the lifting groove two is movably installed with a reverse threaded rod two (246), the bottom end of the reverse threaded rod two (246) is penetrated into the bottom of the adjusting box (245) and is fixedly installed with an adjusting knob (247), the outer wall of the reverse threaded rod two (246) is respectively provided with threaded walls two with opposite threads on the upper and lower sides, the outer walls of the two threaded walls two are both threadedly installed with arc adaptability clamping plates (248), one end of the arc adaptability clamping plate (248) away from the lifting control box (241) is fixedly installed with a clamping cylinder (249), and the opposite surfaces of the two clamping cylinders (249) on the left and right sides are respectively overlapped with the left and right sides of the cutting workpiece (3).

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