Centering collet cutting device

Abstract

The application discloses a centering chuck cutting device, relates to the technical field of cutting devices, and improves the problem that the production device of an arc-shaped metal sheet is prone to causing the centering chuck of a workpiece to move to the side far from a cutting assembly during the cutting process, thereby affecting the standard degree of the cut workpiece, and comprises a cutting lathe, a cutting platform installed on the top of the cutting lathe and a centering cutting assembly arranged on the cutting platform. The centering cutting assembly is internally provided with a centering clamping assembly, and the outer part of the centering cutting assembly is movably provided with a peripheral protection assembly. The centering clamping assembly can drive the guide sleeve to move downwards and make the push rod penetrate into the inside of the special-shaped magnetic block under the action of the clamping cylinder, the special-shaped magnetic block drives the abutting arc plate to move outwards, the centering clamping of the workpiece is carried out, the lifting plate can continuously descend after the centering clamping, the top and bottom of the workpiece are limited by the lifting plate and the bottom support, and the stable clamping work of the workpiece is realized.

Description

Technical Field

[0001] This invention relates to the field of cutting devices, and in particular to a centering chuck cutting device. Background Technology

[0002] A centering clamping mechanism is a clamping mechanism that simultaneously achieves centering, positioning, and clamping of a workpiece. During the clamping process, the constant-speed movement or uniform elastic deformation of the positioning clamping elements eliminates the influence of inaccurate manufacturing of the positioning pair or deviations in positioning dimensions on centering. In the production of curved metal sheets, by using a centering clamping mechanism to clamp the workpiece, a cutting assembly can be used to cut the workpiece into curved metal sheets.

[0003] Chinese invention patent (publication number: CN113427220B) discloses a production apparatus and method for curved metal sheets, including a base, a support, a clamping assembly, a rotating assembly, and a cutting assembly. The base is formed by modifying the body of a CNC lathe and serves as the primary support. The support is mounted on the base and slidably connected to it. The clamping assembly is mounted on the support for clamping the workpiece. The rotating assembly is mounted on the support for adjusting the workpiece's cutting position. The cutting assembly is formed by modifying the spindle of a CNC lathe and is used to cut the workpiece. This application effectively avoids the deviation between the actual produced curvature and the designed curvature of curved metal sheets in related technologies.

[0004] In the process of realizing the above invention, the inventors discovered that the technology has at least the following problems: In the production device for curved metal sheets, during the cutting process, the workpiece installed on the clamping assembly gradually approaches the cutting assembly under the action of the sliding platform. When the workpiece contacts the cutting assembly, it generates an inward pushing force, which causes the workpiece centering chuck to move away from the cutting assembly, affecting the standard of the cut workpiece. At the same time, the workpiece needs to be rotated to a suitable angle for each cut, and the workpiece needs to be repeatedly moved closer and further away from the cutting assembly by the sliding platform to achieve the cutting work. The cutting process is relatively complicated. Therefore, a centering chuck cutting device is now proposed. Summary of the Invention

[0005] To address the issue that the workpiece centering chuck in production equipment for curved metal sheets tends to move away from the cutting components during the cutting process, thus affecting the standardization of the cut workpiece, this invention provides a centering chuck cutting device.

[0006] This invention provides a centering chuck cutting device, which adopts the following technical solution:

[0007] A centering chuck cutting device includes a cutting lathe, a cutting platform mounted on the top of the cutting lathe, and a centering cutting assembly disposed on the cutting platform. The centering cutting assembly has a centering clamping assembly inside and an external protective assembly movable outside. The top of the centering clamping assembly is provided with a fixed bracket fixed to the cutting lathe.

[0008] The centering clamping assembly includes a clamping cylinder disposed at the bottom of the fixed bracket. The output end of the clamping cylinder is connected to a lifting plate. A guide sleeve is fixed below the lifting plate. A sliding plate is disposed inside the guide sleeve. A buffer clamping rod is fixed below the sliding plate. A push rod is disposed below the buffer clamping rod. A centering rod is disposed below the guide sleeve. An abutment shaft passes through the centering rod. An abutment arc plate is fixed at the end of the abutment shaft away from the centering rod. An irregularly shaped magnetic block is fixed at the other end of the abutment shaft.

[0009] The centering cutting assembly includes a guide groove formed on the surface of the cutting platform. A rotating disk is installed below the cutting platform, and a drive shaft is set in the middle of the rotating disk. A servo motor is installed at one end of the drive shaft. A transmission link is installed on the surface of the rotating disk. Guide rails are provided on both the left and right sides of the guide groove. A sliding bracket is slidably installed inside the guide rail, and a serrated blade is installed inside the sliding bracket. The two ends of the transmission link are respectively hinged to the sliding bracket and the rotating disk. A cutting motor is fixed on one side of the sliding bracket, and the output end of the cutting motor is fixedly connected to the serrated blade.

[0010] By adopting the above technical solution, the centering clamping assembly, under the action of the clamping cylinder, can push the guide sleeve downward and insert the push rod into the interior of the irregular magnetic block. After the irregular magnetic block pushes the abutment arc plate outward, the workpiece is centered and clamped. The servo motor can drive the rotating disk to rotate, and then pull the sliding bracket to slide in the guide groove through the transmission linkage, so that the serrated blade is close to the workpiece installed on the centering clamping assembly. The top and bottom ends of the workpiece are limited by the lifting plate and the bottom bracket, and the workpiece is centered and cut at the same time, thereby greatly improving the cutting efficiency of the workpiece.

[0011] As a further embodiment of the present invention, a bottom support is provided below the centering rod, and both the bottom support and the lifting plate are provided with a knife groove.

[0012] By adopting the above technical solution, the blade holder groove allows the serrated blade to enter the bottom bracket and the lifting plate, and the bottom bracket and the lifting plate will not obstruct the normal movement of the serrated blade.

[0013] As a further embodiment of the present invention, the receiving groove and the abutting arc plate are staggered, and both the receiving groove and the abutting arc plate are evenly distributed at equal intervals around the axis of the centering clamping assembly.

[0014] By adopting the above technical solution, the abutting arc plate is located between the two sets of receiving grooves, which can provide internal support for the workpiece.

[0015] As a further embodiment of the present invention, a buffer spring is provided between the sliding plate and the guide sleeve, and the outer diameter of the guide sleeve matches the inner diameter of the centering rod.

[0016] By adopting the above technical solution, the buffer spring can buffer the sliding plate and guide sleeve, so that the bottom support and lifting plate can stably clamp the top and bottom ends of the workpiece.

[0017] As a further embodiment of the present invention, the buffer clamping rod slides within the guide sleeve via a sliding plate, and the push rod passes through the interior of the centering rod, with the central axes of the push rod and the centering rod coinciding with each other.

[0018] By adopting the above technical solution, the guide sleeve can be raised and lowered according to the height of the workpiece.

[0019] As a further embodiment of the present invention, the push rod and the end face of the irregular magnetic block near the central axis of the centering clamping assembly are in contact with each other, and the push rod has a conical structure, and the three sets of irregular magnetic blocks attract each other.

[0020] By adopting the above technical solution, the downward-moving push rod can be pushed outward by the irregular magnetic block to make the abutment arc plate and the inner wall of the workpiece fit together tightly, thereby achieving the centering and clamping of the workpiece.

[0021] As a further embodiment of the present invention, the blade receiving groove and the guide groove are arranged in a one-to-one correspondence, and the width of the guide groove is greater than the width of the blade receiving groove, and the blade receiving groove and the serrated blade form a semi-enclosed structure.

[0022] By adopting the above technical solution, the blade groove and guide groove can be used for the passage of the saw blade.

[0023] As a further embodiment of the present invention, the peripheral protection component includes a connecting frame movably disposed outside the sliding bracket, and the connecting frame and the serrated blade form a semi-enclosed structure. A connecting block is provided between the connecting frame and the sliding bracket, and a connecting slot matching the connecting block is provided on the connecting frame.

[0024] By adopting the above technical solution, the connecting frame can cover one side of the serrated blade, and the outer protective component can be quickly disassembled through the connecting block between the connecting frame and the sliding bracket.

[0025] As a further embodiment of the present invention, the end of the connecting frame is provided with a connecting plate, and a sliding frame is sleeved between the two sets of connecting plates.

[0026] By adopting the above technical solution, the sliding frame can slide on the connecting plate.

[0027] As a further embodiment of the present invention, a telescopic plate is slidably provided on the inner side of the sliding frame, and the connecting plate, the sliding frame and the telescopic plate are combined to form a regular hexagonal structure.

[0028] By adopting the above technical solution, the connecting plate, sliding frame and telescopic plate can extend and retract, and the outer protective component with the regular hexagonal structure can extend and retract synchronously with the movement of the saw blade.

[0029] In summary, the present invention has the following beneficial effects:

[0030] 1. Under the action of the clamping cylinder, the centering clamping assembly of the present invention can push the guide sleeve to move downward and insert the push rod into the interior of the irregular magnetic block. After the irregular magnetic block pushes the abutting arc plate to move outward, the workpiece is centered and clamped. At the same time, the lifting plate can continue to descend after centering and clamping. The lifting plate and the bottom bracket limit the top and bottom ends of the workpiece to achieve stable clamping of the workpiece. When cutting with the centering cutting assembly, the abutting arc plate and the center position of the cut arc plate are closely attached to each other, and the forces generated by the centering cutting assembly moving from the outside to the inside cancel each other out. In addition, the lifting plate and the bottom bracket clamping the top and bottom ends improve the stability of the cutting process. The centering of the entire workpiece remains unchanged during the cutting process.

[0031] 2. The centering cutting assembly of the present invention, under the action of a servo motor, a rotating disk, and a transmission linkage, can synchronously drive three sets of saw blades to move inward. After contacting the workpiece installed at the center of the centering cutting assembly, the workpiece can be cut without repeatedly rotating the workpiece. This greatly improves the cutting efficiency of the workpiece and eliminates the need for workers to repeatedly adjust the workpiece. Furthermore, an external protective assembly can be installed on the outside of the centering cutting assembly as needed to prevent metal chips from splashing during cutting. It can also automatically extend and retract in coordination with the movement of the saw blades. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention.

[0033] Figure 2 This is a three-dimensional structural diagram of the centering clamping assembly of the present invention.

[0034] Figure 3 This is a cross-sectional structural diagram of the centering clamping assembly of the present invention.

[0035] Figure 4 This is a bottom view structural schematic diagram of the centering and cutting component of the present invention.

[0036] Figure 5This is a top view of the centering and cutting assembly of the present invention.

[0037] Figure 6 This is the present invention. Figure 1 Enlarged structural diagram at point A in the middle.

[0038] Figure 7 This is a top view of the structure when the peripheral protection components of this invention are installed.

[0039] Figure 8 This is the present invention. Figure 7 Enlarged structural diagram at point B.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Cutting lathe; 2. Cutting platform; 3. Fixed bracket; 4. Centering clamping assembly; 401. Lifting plate; 402. Clamping cylinder; 403. Guide sleeve; 404. Buffer clamping rod; 405. Push rod; 406. Tool groove; 407. Centering rod; 408. Abutment arc plate; 409. Bottom bracket; 410. Abutment shaft; 411. Irregular magnetic block; 412. Sliding plate; 413. Buffer spring; 5. Centering cutting assembly; 501. Drive shaft; 502. Rotary disk; 503. Cutting motor; 504. Guide rail; 505. Guide groove; 506. Transmission connecting rod; 507. Sliding bracket; 508. Serrated blade; 6. External protection assembly; 601. Connecting plate; 602. Sliding frame; 603. Telescopic plate; 604. Connecting frame; 605. Connecting block. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0043] Please refer to Figure 1 A centering chuck cutting device includes a cutting lathe 1, a cutting platform 2 mounted on the top of the cutting lathe 1, and a centering cutting component 5 disposed on the cutting platform 2. The centering cutting component 5 has a centering clamping component 4 disposed inside, and an outer protective component 6 is movably disposed outside the centering cutting component 5. A fixed bracket 3 fixed on the cutting lathe 1 is disposed on the top of the centering clamping component 4. After the workpiece is placed on the outside of the centering clamping component 4, the workpiece can be centered and clamped, and the workpiece can be cut in conjunction with the centering cutting component 5.

[0044] Reference Figure 2 and Figure 3The centering clamping assembly 4 includes a clamping cylinder 402 disposed at the bottom of the fixed bracket 3. The output end of the clamping cylinder 402 is connected to a lifting plate 401. A guide sleeve 403 is fixed below the lifting plate 401. A sliding plate 412 is disposed inside the guide sleeve 403. A buffer clamping rod 404 is fixed below the sliding plate 412. A push rod 405 is disposed below the buffer clamping rod 404. A centering rod 407 is disposed below the guide sleeve 403. An abutment shaft 410 passes through the centering rod 407. Under the action of the clamping cylinder 402, the centering clamping assembly 4 can push the guide sleeve 403 to move downward.

[0045] Furthermore, an abutment arc plate 408 is fixed to the end of the abutment shaft 410 away from the centering rod 407, and an irregularly shaped magnetic block 411 is fixed to the other end of the abutment shaft 410. The end face of the irregularly shaped magnetic block 411 near the push rod 405 is an upward inclined surface. The push rod 405 and the end face of the irregularly shaped magnetic block 411 near the central axis of the centering clamping assembly 4 are in contact with each other, and the push rod 405 has a conical structure. The three sets of irregularly shaped magnetic blocks 411 attract each other. By using the downward moving push rod 405, the abutment shaft 410 can be pushed outward through the irregularly shaped magnetic blocks 411, so that the abutment arc plate 408 is pressed tightly against the inner wall of the workpiece, thus achieving centering and clamping of the workpiece. When the push rod 405 is inserted into the interior of the irregularly shaped magnetic block 411, the abutment arc plate 408 is pushed outward by the irregularly shaped magnetic block 411, thus centering and clamping the workpiece.

[0046] Because a bottom support 409 is provided below the centering rod 407, and both the bottom support 409 and the lifting plate 401 have tool receiving grooves 406 inside, the tool receiving grooves 406 and the abutting arc plates 408 are staggered, and the tool receiving grooves 406 and the abutting arc plates 408 are evenly distributed at equal intervals around the axis of the centering clamping assembly 4. The abutting arc plates 408 are located between the two sets of tool receiving grooves 406, which can provide internal support for the workpiece.

[0047] Meanwhile, a buffer spring 413 is provided between the sliding plate 412 and the guide sleeve 403, and the outer diameter of the guide sleeve 403 matches the inner diameter of the centering rod 407. The buffer spring 413 can buffer the sliding plate 412 and the guide sleeve 403, so that the bottom support 409 and the lifting plate 401 can stably clamp the top and bottom ends of the workpiece. The buffer clamping rod 404 slides in the guide sleeve 403 through the sliding plate 412, and the push rod 405 passes through the interior of the centering rod 407. The central axis of the push rod 405 and the centering rod 407 coincide. The guide sleeve 403 can be raised and lowered according to the height of the workpiece.

[0048] Reference Figures 4-6The centering cutting component 5 includes a guide groove 505 formed on the surface of the cutting platform 2. A rotating disk 502 is installed below the cutting platform 2, and a drive shaft 501 is provided in the middle of the rotating disk 502. A servo motor is installed at one end of the drive shaft 501. A transmission connecting rod 506 is installed on the surface of the rotating disk 502. Guide rails 504 are provided on both the left and right sides of the guide groove 505. A sliding bracket 507 is slidably installed inside the guide rail 504, and a serrated blade 508 is provided inside the sliding bracket 507. The guide groove 505 and the guide rails 504 can guide the sliding bracket 507.

[0049] Furthermore, the two ends of the transmission link 506 are hinged to the sliding bracket 507 and the rotating disk 502 respectively. A cutting motor 503 is fixed on one side of the sliding bracket 507, and the output end of the cutting motor 503 is fixedly connected to the serrated blade 508. The servo motor drives the rotating disk 502 to rotate through the drive shaft 501, thereby causing the transmission link 506 to rotate on the rotating disk 502. When the rotating disk 502 rotates, it can pull the sliding bracket 507 to slide in the guide groove 505 and the guide rail 504. After the servo motor drives the rotating disk 502 to rotate, it can pull the sliding bracket 507 to slide in the guide groove 505 through the transmission link 506, so that the serrated blade 508 is close to the workpiece installed on the centering clamping assembly 4. The top and bottom ends of the workpiece are limited by the lifting plate 401 and the bottom bracket 409, and the workpiece is centered and cut at the same time, thereby greatly improving the cutting efficiency of the workpiece.

[0050] Meanwhile, the blade receiving groove 406 and the guide groove 505 are provided in a one-to-one correspondence, and the width of the guide groove 505 is greater than the width of the blade receiving groove 406. The blade receiving groove 406 and the guide groove 505 allow the serrated blade 508 to pass through. The blade receiving groove 406 and the serrated blade 508 form a semi-enclosed structure. The blade receiving groove 406 allows the serrated blade 508 to enter the bottom bracket 409 and the lifting plate 401. The bottom bracket 409 and the lifting plate 401 will not obstruct the normal movement of the serrated blade 508.

[0051] Reference Figure 7 and Figure 8 The outer protective component 6 includes a connecting frame 604 movably disposed outside the sliding bracket 507, and the connecting frame 604 and the serrated blade 508 form a semi-enclosed structure. A connecting block 605 is provided between the connecting frame 604 and the sliding bracket 507, and a connecting slot matching the connecting block 605 is provided on the connecting frame 604. The connecting frame 604 can wrap around one side of the serrated blade 508. The outer protective component 6 can be quickly disassembled through the connecting block 605 between the connecting frame 604 and the sliding bracket 507.

[0052] Since the end of the connecting frame 604 is provided with a connecting plate 601, and a sliding frame 602 is sleeved between the two sets of connecting plates 601, the sliding frame 602 can slide on the connecting plate 601. A telescopic plate 603 is slidably provided on the inner side of the sliding frame 602. The connecting plate 601, the sliding frame 602 and the telescopic plate 603 are combined to form a regular hexagonal structure. The connecting plate 601, the sliding frame 602 and the telescopic plate 603 can extend and retract. The outer protective component 6 of the regular hexagonal structure can extend and retract synchronously with the movement of the serrated blade 508.

[0053] The implementation principle of this invention is as follows: the workpiece is placed on the outside of the centering rod 407, the clamping cylinder 402 at the bottom of the fixed bracket 3 is activated, the clamping cylinder 402 pushes the entire lifting plate 401 to move downward, so that the push rod 405 is inserted into the interior of the irregular magnetic block 411, and at the same time, the irregular magnetic block 411 pushes the abutting arc plate 408 to move outward until the abutting arc plate 408 is pressed against the inner wall of the workpiece. Meanwhile, the buffer clamping rod 404 continues to descend under the action of the clamping cylinder 402, and the buffer spring 413 inside the guide sleeve 403 is compressed inward by the sliding plate 412 until the lifting plate 401 and the bottom bracket 409 limit the top and bottom ends of the workpiece.

[0054] Then, the cutting motor 503 on one side of the serrated blade 508 and the servo motor on one side of the drive shaft 501 in the middle of the rotating disk 502 are started simultaneously. The servo motor drives the rotating disk 502 to rotate through the drive shaft 501, thereby causing the transmission link 506 to rotate on the rotating disk 502. Since the two ends of the transmission link 506 are hinged to the rotating disk 502 and the sliding bracket 507 respectively, when the rotating disk 502 rotates, it can pull the sliding bracket 507 to slide in the guide groove 505 and the guide rail 504, thus synchronously driving the three sets of serrated blades 508 to move inward until they come into contact with the workpiece installed at the center position of the centering cutting assembly 5. The rotating serrated blades 508 can cut the workpiece. Since the abutting arc plate 408 is in close contact with the center position of the cut arc plate, the force generated by the centering cutting assembly 5 moving from the outside to the inside cancels each other out. In addition, the lifting plate 401 and the bottom bracket 409 clamped at the top and bottom ends improve the stability during the cutting process. The centering of the entire workpiece remains unchanged during the cutting process.

[0055] An external protective assembly 6 can be installed on the outside of the centering cutting assembly 5 as needed. The connecting frame 604 is installed on the outside of the sliding bracket 507 directly through the connecting block 605 between the connecting frame 604 and the sliding bracket 507, enclosing the serrated blade 508 inside. At the same time, a sliding frame 602 is fitted between the two sets of connecting plates 601. When the serrated blade 508 moves through the sliding bracket 507, the connecting plate 601 can be moved by the connecting frame 604. The hexagonal connecting plate 601, the sliding frame 602 and the telescopic plate 603 slide and extend in pairs, so that they can extend and retract synchronously with the movement of the serrated blade 508.

[0056] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A centering chuck cutting device, comprising a cutting lathe (1), a cutting platform (2) mounted on the top of the cutting lathe (1), and a centering cutting assembly (5) disposed on the cutting platform (2), characterized in that: The centering cutting assembly (5) is provided with a centering clamping assembly (4) inside, and an outer protective assembly (6) is provided on the outside of the centering cutting assembly (5). The top of the centering clamping assembly (4) is provided with a fixed bracket (3) fixed on the cutting lathe (1). The centering clamping assembly (4) includes a clamping cylinder (402) disposed at the bottom of the fixed bracket (3). The output end of the clamping cylinder (402) is connected to a lifting plate (401). A guide sleeve (403) is fixed below the lifting plate (401). A sliding plate (412) is disposed inside the guide sleeve (403). A buffer clamping rod (404) is fixed below the sliding plate (412). A push rod (405) is disposed below the buffer clamping rod (404). A centering rod (407) is disposed below the guide sleeve (403). An abutment shaft (410) passes through the centering rod (407). An abutment arc plate (408) is fixed at the end of the abutment shaft (410) away from the centering rod (407). A shaped magnetic block (411) is fixed at the other end of the abutment shaft (410). The centering cutting assembly (5) includes a guide groove (505) formed on the surface of the cutting platform (2). A rotating disk (502) is installed below the cutting platform (2), and a drive shaft (501) is provided in the middle of the rotating disk (502). A servo motor is installed at one end of the drive shaft (501). A transmission link (506) is installed on the surface of the rotating disk (502). Guide rails (504) are provided on both the left and right sides of the guide groove (505). A sliding bracket (507) is slidably installed inside the guide rail (504), and a serrated blade (508) is provided inside the sliding bracket (507). The two ends of the transmission link (506) are hinged to the sliding bracket (507) and the rotating disk (502) respectively. A cutting motor (503) is fixed on one side of the sliding bracket (507), and the output end of the cutting motor (503) is fixedly connected to the serrated blade (508). A bottom bracket (409) is provided below the centering rod (407), and both the bottom bracket (409) and the lifting plate (401) have knife grooves (406) inside. The push rod (405) and the irregular magnetic block (411) are in contact with each other on one side of the centering clamping assembly (4) near the central axis. The push rod (405) has a conical structure, and the irregular magnetic block (411) has an upward inclined surface on one side of the push rod (405).

2. The centering chuck cutting device according to claim 1, characterized in that, The knife groove (406) and the abutting arc plate (408) are staggered, and both the knife groove (406) and the abutting arc plate (408) are evenly distributed at equal intervals around the axis of the centering clamping assembly (4).

3. The centering chuck cutting device according to claim 2, characterized in that, A buffer spring (413) is provided between the sliding plate (412) and the guide sleeve (403), and the outer diameter of the guide sleeve (403) matches the inner diameter of the centering rod (407).

4. The centering chuck cutting device according to claim 3, characterized in that, The buffer clamping rod (404) slides within the guide sleeve (403) via the sliding plate (412), and the push rod (405) passes through the interior of the centering rod (407), with the central axis of the push rod (405) coinciding with that of the centering rod (407).

5. A centering chuck cutting device according to claim 4, characterized in that, The three sets of irregular magnetic blocks (411) attract each other.

6. A centering chuck cutting device according to claim 5, characterized in that, The blade groove (406) and the guide groove (505) are provided in a one-to-one correspondence, and the width of the guide groove (505) is greater than the width of the blade groove (406). The blade groove (406) and the serrated blade (508) form a semi-enclosed structure.

7. A centering chuck cutting device according to claim 6, characterized in that, The peripheral protection component (6) includes a connecting frame (604) movably disposed outside the sliding bracket (507), and the connecting frame (604) and the serrated blade (508) form a semi-enclosed structure. A connecting block (605) is provided between the connecting frame (604) and the sliding bracket (507), and a connecting slot matching the connecting block (605) is provided on the connecting frame (604).

8. A centering chuck cutting device according to claim 7, characterized in that, The end of the connecting frame (604) is provided with a connecting plate (601), and a sliding frame (602) is sleeved between the two sets of connecting plates (601).

9. A centering chuck cutting device according to claim 8, characterized in that, The sliding frame (602) has a telescopic plate (603) slidably disposed on its inner side, and the connecting plate (601), the sliding frame (602) and the telescopic plate (603) are combined to form a regular hexagonal structure.

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