Automatic dust removal device of numerical control machine tool

Abstract

The invention discloses an automatic dust removal device of a numerical control machine tool and relates to the technical field of numerical control machine tools. Comprising a case, and a three-jaw clamping piece is arranged in the case; a limiting box is arranged in the machine box in a sliding mode, and a machining mechanism is arranged on one side of the limiting box and used for cutting a workpiece. Machining holes are formed in the two end faces of the limiting box correspondingly, and an inspection mechanism is arranged on the machining hole facing the workpiece and used for inspecting the straightness of the workpiece; a filter plate is detachably arranged at the top end in the limiting box and is used for filtering scraps; a clearing mechanism is movably arranged below the filter plate; a scraping mechanism is arranged at the bottom end in the limiting box and used for scraping scraps. A control mechanism is arranged on the side face of the machine box and used for controlling the removing mechanism and the scraping mechanism to move. In the machining process, sweeps and raised dust can be effectively limited and prevented from splashing all around, treatment is facilitated, and the working environment is improved.

Description

Technical Field

[0001] This invention relates to the field of CNC machine tool technology, and in particular to an automatic dust removal device for CNC machine tools. Background Technology

[0002] CNC machine tools are mechanical devices whose motion and machining processes are controlled by computer programs, and are widely used in industries such as metal processing and plastics manufacturing. The main characteristics of CNC machine tools are high precision, high efficiency, and a high degree of automation. They come in many types, including CNC milling machines and CNC lathes. CNC lathes are machine tools used for machining shaft-type components. They achieve cutting of the workpiece through rotary feed motion. During the cutting process, a large amount of waste chips and dust are generated. Existing CNC lathes can only handle waste chips and dust after machining is completed; they cannot effectively limit waste chips and dust during machining, leading to them flying everywhere and creating a harsh working environment. Therefore, this invention proposes a dust removal device that can effectively limit waste chips and dust during machining, preventing them from flying everywhere, facilitating handling, and improving the working environment. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention can effectively limit waste and dust during processing, preventing them from splashing everywhere, facilitating handling, and improving the working environment.

[0004] The present invention provides an automatic dust removal device for a CNC machine tool, comprising a housing, inside which a three-jaw clamping component is provided for clamping workpieces; a limiting box is slidably disposed inside the housing, with a transmission hole at the top of the limiting box, and a suction mechanism at the top of the housing, which communicates with the transmission hole; a machining mechanism is disposed on one side of the limiting box for cutting the workpiece; machining holes are respectively provided on the two end faces of the limiting box, and an inspection mechanism is disposed on the machining hole facing the workpiece for checking the straightness of the workpiece; a filter plate is detachably disposed at the top of the limiting box for filtering out waste chips; a cleaning mechanism is movably disposed below the filter plate; a scraping mechanism is disposed at the bottom of the limiting box for scraping out waste chips; and a control mechanism is disposed on the side of the housing for controlling the movement of the cleaning mechanism and the scraping mechanism respectively.

[0005] Furthermore, the three-jaw gripper includes a fixed platform disposed inside the machine housing, a drive motor fixedly disposed on the fixed platform, and a three-jaw gripper rotating on the fixed platform. The drive motor is used to drive the three-jaw gripper, and the three-jaw gripper is used to grip the workpiece.

[0006] Furthermore, a motor is fixedly installed on the chassis, and a lead screw is rotatably installed. The motor drives the lead screw, and the lead screw and the limiting box form a helical pair. A collection trough is provided inside the chassis and below the limiting box for collecting waste.

[0007] Furthermore, a release groove is provided at the bottom of the limiting box, and a release control electric cylinder is provided at the release groove. A baffle plate is provided on the extension rod of the release control electric cylinder to control the falling of waste. The suction mechanism includes a suction collection box provided at the top of the machine box, and a transmission pipe is connected to the suction collection box. One end of the transmission pipe is connected to the transmission hole at the top of the limiting box.

[0008] Furthermore, the filter plate is detachably mounted inside the limiting box via the end face of the limiting box, and the filter plate is arc-shaped and fits against the inner side of the limiting box; a fixing electric cylinder is provided on the outside of the limiting box, and the end of the filter plate is provided with a fixing hole and is fixed by the fixing electric cylinder.

[0009] Furthermore, the processing mechanism includes a mating groove formed on the side of the limiting box, a processing control electric cylinder is provided on the mating groove, a mating seat is provided on the telescopic rod of the processing control electric cylinder, the mating seat is slidably mated with the mating groove, and a radial feed cylinder is provided on the mating seat, and a processing part is provided on the telescopic rod of the radial feed cylinder.

[0010] Furthermore, the control mechanism includes a control rotary seat rotatably mounted on the chassis, a control electric cylinder mounted on the control rotary seat, a control motor mounted on the chassis, a control gear mounted on the output shaft of the control motor, the control gear meshing with the control rotary seat, an angle frame mounted on the telescopic rod of the control electric cylinder, a clamping motor mounted at one end of the angle frame, a clamping seat mounted on the output shaft of the clamping motor, a clamping electric cylinder and a clamping rod mounted on the clamping seat, the clamping electric cylinder being used to control the radial movement of the clamping rod; the clamping rod being used to clamp the control cleaning mechanism and the scraping mechanism, a moving groove being provided on the end face of the limiting box facing away from the workpiece, the cleaning mechanism and the scraping mechanism moving in the moving groove.

[0011] Furthermore, the cleaning mechanism includes a movable seat 1 movably disposed on the movable groove, a folding telescopic blocking layer is provided between the movable seat 1 and the movable groove, and a fixing electric cylinder 2 is provided on the end face of the limiting box. A positioning hole 1 is opened on the movable seat 1 and fixed by the fixing electric cylinder 2. A cleaning brush cylinder is rotatably disposed on the movable seat 1 and is located below the filter plate. One end of the movable seat 1 is clamped and controlled by a clamping rod.

[0012] Furthermore, the scraping mechanism includes a movable seat two movably disposed on a movable groove, a foldable telescopic blocking layer is provided between the movable seat two and the movable groove, and a fixed electric cylinder three is provided on the end face of the limiting box. A positioning hole two is provided on the movable seat two and fixed by the fixed electric cylinder three. A scraper is rotatably disposed on the movable seat two, and one end of the scraper is clamped and controlled by a clamping rod.

[0013] Furthermore, the inspection mechanism includes a position electric cylinder mounted on a limiting box, a position ring mounted on the telescopic rod of the position electric cylinder, a pusher mounted on the position ring, a radial shaft that extends and retracts radially over the machining hole, a push seat mounted on the top of the radial shaft, a spring connected between the push seat and the machining hole, a sloping groove mounted on the push seat, the pusher moving in the sloping groove to control the movement of the push seat, a telescopic contact rod that extends and retracts inside the radial shaft, and a displacement sensor connected between the telescopic contact rod and the radial shaft to output feedback information on the extension and retraction displacement of the telescopic contact rod.

[0014] The beneficial effects of this invention compared with the prior art are: (1) The workpiece extends into the interior of the limiting box through the processing hole on the limiting box, so that the cutting area is always located inside the limiting box, which can effectively limit the splashing of waste chips and dust; (2) During processing, the waste chips will be collected at the bottom of the limiting box, and the dust will be collected by the suction and absorption box. Specifically, the dust can be transported through the transmission hole and the transmission pipe by the suction and absorption box. The filter plate can block the waste chips and only allow the dust to pass through, thereby completing the separation of waste chips and dust; (3) The clamping motor drives the scraper to rotate, and the angle frame adjusts the angle, which can drive the second moving seat to move on the moving slot. The scraper rotates to realize the scraping and cleaning operation of the waste chips inside the limiting box; furthermore, the clamping rod can also clamp and control the cleaning brush cylinder and drive the first moving seat to move on the moving slot. The cleaning brush cylinder moves below the filter plate. By rotating the cleaning brush cylinder, the dust and waste chips attached to the filter plate can be cleaned. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the interior of the chassis of the present invention.

[0017] Figure 3 This is a schematic diagram of the internal structure of the chassis of the present invention from another angle.

[0018] Figure 4 This is a schematic diagram of the installation structure of the control mechanism of the present invention.

[0019] Figure 5 This is a schematic diagram of the installation structure of the limiting box of the present invention.

[0020] Figure 6 This is a schematic diagram of the limiting box structure from another angle according to the present invention.

[0021] Figure 7 This is a schematic diagram of the processing mechanism of the present invention.

[0022] Figure 8 This is a schematic diagram of the inspection mechanism structure of the present invention.

[0023] Figure 9This is a schematic diagram of the installation structure of the cleaning mechanism and scraping mechanism of the present invention.

[0024] Figure 10 This is a schematic diagram of the filter plate installation structure of the present invention.

[0025] Figure 11 This is a schematic diagram of the cleaning mechanism structure of the present invention.

[0026] Figure 12 This is a schematic diagram of the scraping mechanism of the present invention.

[0027] Figure 13 This is a schematic diagram of the end structure of the limiting box of the present invention.

[0028] Attached reference numerals: 1-Chassis; 2-Absorption collection box; 3-Transfer pipe; 4-Fixed platform; 5-Drive motor; 6-Motor 1; 7-Lead screw 1; 8-Collection trough; 9-Limiting box; 10-Three-jaw gripper; 11-Control rotary seat; 12-Control motor; 13-Control gear; 14-Control electric cylinder; 15-Angle frame; 16-Clamping motor; 17-Clamping seat; 18-Clamping electric cylinder; 19-Clamping rod; 20-Transfer hole; 21-Machining control electric cylinder; 22-Matching seat; 23-Matching groove; 24-Release control... 25-Stopping plate; 26-Machining hole; 27-Radial feed cylinder; 28-Machining section; 29-Positioning cylinder; 30-Positioning ring; 31-Push wheel; 32-Radial shaft; 33-Telescopic contact rod; 34-Displacement sensor; 35-Push seat; 36-Spring 1; 37-Fixed cylinder 1; 38-Moving seat 1; 39-Moving seat 2; 40-Fixed cylinder 2; 41-Fixed cylinder 3; 42-Folding telescopic blocking layer; 43-Filter plate; 44-Cleansing brush cylinder; 45-Scraper frame; 46-Moving groove. Detailed Implementation

[0029] Example: Figures 1 to 13 As shown, an automatic dust removal device for a CNC machine tool includes a housing 1. A three-jaw clamping component is installed inside the housing 1 for clamping workpieces. A limiting box 9 is slidably installed inside the housing 1. A transmission hole 20 is opened on the top of the limiting box 9. A suction mechanism is installed on the top of the housing 1, and the suction mechanism communicates with the transmission hole 20. A machining mechanism is installed on one side of the limiting box 9 for cutting the workpiece. Machining holes 26 are respectively opened on the two end faces of the limiting box 9, and an inspection mechanism is installed on the machining hole 26 facing the workpiece for checking the straightness of the workpiece. A filter plate 43 is detachably installed at the top inside the limiting box 9 for filtering out waste chips. A cleaning mechanism is movably installed below the filter plate 43. A scraping mechanism is installed at the bottom inside the limiting box 9 for scraping out waste chips. A control mechanism is installed on the side of the housing 1 for controlling the movement of the cleaning mechanism and the scraping mechanism respectively.

[0030] like Figure 2 and Figure 3 As shown, the three-jaw gripper includes a fixed platform 4 disposed inside the housing 1, a drive motor 5 fixedly disposed on the fixed platform 4, and a three-jaw gripper 10 rotatably disposed thereon. The drive motor 5 is used to drive the three-jaw gripper 10, and the three-jaw gripper 10 is used to grip the workpiece. A motor 6 is fixedly disposed on the housing 1, and a lead screw 7 is rotatably disposed thereon. The motor 6 is used to drive the lead screw 7, and the lead screw 7 and the limiting box 9 form a helical pair. A collection trough 8 is disposed inside the housing 1 and below the limiting box 9 for collecting waste chips.

[0031] like Figure 1 , Figure 6 As shown, a release groove is provided at the bottom of the limiting box 9, and a release control electric cylinder 24 is provided at the release groove. A baffle plate 25 is provided on the telescopic rod of the release control electric cylinder 24 to control the falling of waste. The suction mechanism includes a suction collection box 2 provided at the top of the casing 1. A transmission pipe 3 is connected to the suction collection box 2, and one end of the transmission pipe 3 is connected to the transmission hole 20 at the top of the limiting box 9.

[0032] like Figure 9 and Figure 10 As shown, the filter plate 43 is detachably mounted inside the limiting box 9 via the end face of the limiting box 9. The filter plate 43 is arc-shaped and fits against the inner side of the limiting box 9. A fixing electric cylinder 37 is provided on the outside of the limiting box 9. The end of the filter plate 43 is provided with a fixing hole and is fixed by the fixing electric cylinder 37.

[0033] like Figure 5 and Figure 7 As shown, the processing mechanism includes a mating groove 23 on the side of the limiting box 9. A processing control electric cylinder 21 is provided on the mating groove 23. A mating seat 22 is provided on the telescopic rod of the processing control electric cylinder 21. The mating seat 22 is slidably mated with the mating groove 23. A radial feed cylinder 27 is provided on the mating seat 22. A processing part 28 is provided on the telescopic rod of the radial feed cylinder 27.

[0034] like Figure 4 and Figure 13 As shown, the control mechanism includes a control rotary seat 11 rotatably mounted on the housing 1, a control electric cylinder 14 mounted on the control rotary seat 11, and a control motor 12 mounted on the housing 1. A control gear 13 is mounted on the output shaft of the control motor 12, and the control gear 13 meshes with the control rotary seat 11. An angle frame 15 is mounted on the telescopic rod of the control electric cylinder 14, and a clamping motor 16 is mounted at one end of the angle frame 15. A clamping seat 17 is mounted on the output shaft of the clamping motor 16, and a clamping electric cylinder 18 and a clamping rod 19 are mounted on the clamping seat 17. The clamping electric cylinder 18 is used to control the radial movement of the clamping rod 19. The clamping rod 19 is used to clamp the control cleaning mechanism and the scraping mechanism. A moving groove 46 is provided on the end face of the limiting box 9 facing away from the workpiece, and the cleaning mechanism and the scraping mechanism move in the moving groove 46.

[0035] like Figure 9 and Figure 11 As shown, the cleaning mechanism includes a movable seat 38 movably mounted on a movable groove 46, a foldable telescopic blocking layer 42 between the movable seat 38 and the movable groove 46, and a fixing electric cylinder 40 on the end face of the limiting box 9. A positioning hole is provided on the movable seat 38 and it is fixed by the fixing electric cylinder 40. A cleaning brush cylinder 44 is rotatably mounted on the movable seat 38 and is located below the filter plate 43. One end of the movable seat 38 is clamped and controlled by a clamping rod 19.

[0036] like Figure 9 and Figure 12 As shown, the scraping mechanism includes a second movable seat 39 movably disposed on a movable groove 46, a foldable telescopic blocking layer 42 disposed between the second movable seat 39 and the movable groove 46, and a third fixed electric cylinder 41 disposed on the end face of the limiting box 9. A second positioning hole is provided on the second movable seat 39 and it is fixed by the third fixed electric cylinder 41. A scraper 45 is rotatably disposed on the second movable seat 39, and one end of the scraper 45 is clamped and controlled by a clamping rod 19.

[0037] like Figure 8 As shown, the inspection mechanism includes a position cylinder 29 mounted on the limiting box 9. A position ring 30 is mounted on the telescopic rod of the position cylinder 29. A pusher 31 is mounted on the position ring 30. A radial shaft 32 is radially telescopically mounted on the machining hole 26. A push seat 35 is mounted on the top of the radial shaft 32. A spring 36 is connected between the push seat 35 and the machining hole 26. An inclined groove is provided on the push seat 35. The pusher 31 moves in the inclined groove to control the movement of the push seat 35. A telescopic contact rod 33 is telescopically mounted inside the radial shaft 32. A displacement sensor 34 is connected between the telescopic contact rod 33 and the radial shaft 32 to output feedback information on the telescopic displacement of the telescopic contact rod 33.

[0038] The working principle is as follows: The workpiece is clamped and fixed by the three-jaw gripper 10. This clamping method is a common fixing method in existing machine tools and will not be described in detail here. During processing, the motor 6 drives the lead screw 7 to rotate, causing the limiting box 9 to move. The workpiece extends into the interior of the limiting box 9 through the machining hole 26 on the limiting box 9, so that the cutting area is always located inside the limiting box 9, which can effectively limit the splashing of waste chips and dust. Specifically, inside the limiting box 9, the radial position of the machining part 28 is controlled by the radial feed cylinder 27 to achieve feed control, thereby completing the cutting of the workpiece. Subsequently, the machining control electric cylinder 21 can control the movement of the mating seat 22 to make the machining part 28 disengage from the limiting box 9, which facilitates the replacement operation.

[0039] During processing, waste chips are collected at the bottom of the confinement box 9. Dust is collected by the suction and absorption box 2. Specifically, the dust is transported through the transmission hole 20 and the transmission pipe 3 by the suction and absorption box 2. The filter plate 43 can block the waste chips and only allow the dust to pass through, thereby completing the separation of waste chips and dust. The fixed electric cylinder 37 fixes the filter plate 43, and the fixation can be released later to realize the maintenance and replacement of the filter plate 43.

[0040] When processing waste, the baffle plate 25 can be moved by releasing the control cylinder 24, and the waste can fall from the release slot at the bottom of the limiting box 9 into the collection slot 8. Further, by positioning the limiting box 9 in a preset processing position, the position of the angle frame 15 is controlled by the control cylinder 14, and the control motor 12 drives the control rotary seat 11 to adjust the angle. This allows the clamping cylinder 18 to control the clamping rod 19 to clamp and fix one end of the scraper 45. Then, the clamping motor 16 drives the scraper 45 to rotate, and the angle frame 15 adjusts its angle, which can move the scraper... The second movable seat 39 moves on the movable groove 46, and the scraper 45 rotates to scrape and clean the waste inside the limiting box 9. Furthermore, the clamping rod 19 can also clamp and control the cleaning brush cylinder 44, and drive the first movable seat 38 to move on the movable groove 46. The cleaning brush cylinder 44 moves below the filter plate 43. By rotating the cleaning brush cylinder 44, the dust and waste attached to the filter plate 43 are cleaned. The first movable seat 38 and the second movable seat 39 can be fixed and controlled by the second fixed electric cylinder 40 and the third fixed electric cylinder 41, respectively.

[0041] Furthermore, during the processing, the workpiece continuously extends into the interior of the limiting box 9. In the area where the processing hole 26 is located, the telescopic contact rod 33 can contact the workpiece surface. Combined with the workpiece's rotation, the straightness of the workpiece can be checked. Specifically, the position ring 30 is moved by the position electric cylinder 29, and the push wheel 31 pushes the push seat 35, causing the radial shaft 32 to move telescopically, thereby controlling the contact between the telescopic contact rod 33 and the workpiece.

Claims

1. An automatic dust removal device of a numerical control machine tool, comprising a machine box (1), wherein a three-jaw chuck is arranged inside the machine box (1) and used for clamping a workpiece; characterized in that: The inside of the case (1) is slidably provided with a limiting box (9), the top of the limiting box (9) is provided with a transmission hole (20), the top of the case (1) is provided with a suction mechanism, the suction mechanism is communicated with the transmission hole (20); One side of the limiting box (9) is provided with a machining mechanism for cutting machining of the workpiece; The two end faces of the limiting box (9) are respectively provided with machining holes (26), and the machining hole (26) facing the workpiece is provided with an inspection mechanism for inspecting the straightness of the workpiece; A filter plate (43) is detachably arranged at the top of the inside of the limiting box (9) for filtering out the waste; A cleaning mechanism is movably arranged below the filter plate (43); A scraping mechanism is arranged at the bottom of the inside of the limiting box (9) for scraping the waste; The side of the case (1) is provided with a control mechanism for controlling the movement of the cleaning mechanism and the scraping mechanism respectively.

2. The automatic dust removal device of a numerically controlled machine tool according to claim 1, characterized in that: The three-jaw clamping piece includes a fixed table (4) arranged in the case (1), a driving motor (5) fixedly arranged on the fixed table (4), and a three-jaw grab disc (10) rotatably arranged, the driving motor (5) is used for driving the three-jaw grab disc (10), and the three-jaw grab disc (10) is used for clamping the workpiece.

3. The automatic dust removal device of a numerically controlled machine tool according to claim 1, characterized in that: The motor one (6) is fixedly arranged on the case (1), and the screw rod one (7) is rotatably arranged, the motor one (6) is used for driving the screw rod one (7), and the screw rod one (7) and the limiting box (9) constitute a screw pair, a collecting groove (8) is arranged in the inside of the case (1) and below the limiting box (9) for collecting the waste.

4. The automatic dust removal device of a numerically controlled machine tool according to claim 3, characterized in that: The bottom end of the limiting box (9) is provided with a release slot, the release control cylinder (24) is arranged at the release slot, the blocking plate (25) is arranged on the extension rod of the release control cylinder (24) for controlling the falling of the waste, and the suction mechanism includes a suction collecting box (2) arranged at the top of the case (1), the suction collecting box (2) is communicated with the transmission pipe (3), one end of the transmission pipe (3) is communicated with the transmission hole (20) at the top of the limiting box (9).

5. The automatic dust removal device of a numerically controlled machine tool according to claim 1, characterized in that: The filter plate (43) is detachably arranged in the inside of the limiting box (9) through the end face of the limiting box (9), the filter plate (43) is arc-shaped and is attached to the inside of the limiting box (9); A fixed cylinder one (37) is arranged outside the limiting box (9), a fixed hole is arranged at the end of the filter plate (43), and the fixed hole is fixed by the fixed cylinder one (37).

6. The automatic dust removal device of a numerically controlled machine tool according to claim 1, characterized in that: The machining mechanism includes a matching groove (23) arranged on the side face of the limiting box (9), a machining control cylinder (21) is arranged on the matching groove (23), a matching seat (22) is arranged on the extension rod of the machining control cylinder (21), the matching seat (22) is slidably matched with the matching groove (23), a radial feeding oil cylinder (27) is arranged on the matching seat (22), and a machining part (28) is arranged on the extension rod of the radial feeding oil cylinder (27).

7. The automatic dust removal device of a numerically controlled machine tool according to claim 1, characterized in that: The control mechanism comprises a control rotating seat (11) rotatably arranged on the case (1), a control electric cylinder (14) arranged on the control rotating seat (11), a control motor (12) arranged on the case (1), a control gear (13) arranged on an output shaft of the control motor (12), the control gear (13) being engaged with the control rotating seat (11), an angle frame (15) arranged on an extension rod of the control electric cylinder (14), a clamping motor (16) arranged at one end of the angle frame (15), a clamping seat (17) arranged on an output shaft of the clamping motor (16), a clamping electric cylinder (18) and a clamping rod (19) arranged on the clamping seat (17), the clamping electric cylinder (18) being used for controlling the clamping rod (19) to move radially, and the clamping rod (19) being used for clamping a control cleaning mechanism and a scraping mechanism; a moving groove (46) is formed on an end surface of the limiting box (9) facing away from the workpiece, and the cleaning mechanism and the scraping mechanism move in the moving groove (46).

8. The automatic dust removal device of a numerically controlled machine tool according to claim 7, characterized in that: The cleaning mechanism comprises a moving seat one (38) movably arranged on the moving groove (46), a folding telescopic blocking layer (42) arranged between the moving seat one (38) and the moving groove (46), a fixed electric cylinder two (40) arranged on the end surface of the limiting box (9), a positioning hole one formed on the moving seat one (38) and fixed by the fixed electric cylinder two (40), a cleaning brush cylinder (44) rotatably arranged on the moving seat one (38), and the cleaning brush cylinder (44) being located below a filter plate (43); and one end of the moving seat one (38) is clamped and controlled by the clamping rod (19).

9. The automatic dust removal device of a numerically controlled machine tool according to claim 7, characterized in that: The scraping mechanism comprises a moving seat two (39) movably arranged on the moving groove (46), a folding telescopic blocking layer (42) arranged between the moving seat two (39) and the moving groove (46), a fixed electric cylinder three (41) arranged on the end surface of the limiting box (9), a positioning hole two formed on the moving seat two (39) and fixed by the fixed electric cylinder three (41), and a scraping frame (45) rotatably arranged on the moving seat two (39); and one end of the scraping frame (45) is clamped and controlled by the clamping rod (19).

10. The automatic dust removal device of a numerically controlled machine tool according to claim 1, characterized in that: The inspection mechanism comprises a position electric cylinder (29) arranged on the limiting box (9), a position ring (30) arranged on an extension rod of the position electric cylinder (29), a push wheel (31) arranged on the position ring (30), a radial shaft (32) radially telescopically arranged on a machining hole (26), a push seat (35) arranged at a top of the radial shaft (32), a spring one (36) connected between the push seat (35) and the machining hole (26), an inclined groove arranged on the push seat (35), the push wheel (31) moving in the inclined groove to control the push seat (35) to move, a telescopic contact rod (33) telescopically arranged in the radial shaft (32), and a displacement sensor (34) connected between the telescopic contact rod (33) and the radial shaft (32) and used for outputting feedback information of telescopic displacement of the telescopic contact rod (33).

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