A positioning tool for CNC machine tools

Abstract

The present invention discloses a positioning tool for a CNC machine tool, which relates to the technical field of machine tool processing, and comprises a base, and also comprises: a moving mechanism, which is installed on the top of the base; a fitting clamping mechanism, which is installed on the front side of the moving mechanism and is used to fit the shape of the workpiece for clamping; a debris handling mechanism, which is installed on the moving mechanism and is used to handle debris dropped into the fitting clamping mechanism during the processing of the workpiece; the present invention positions the workpiece by installing the fitting clamping mechanism and using the method of hydraulically fitting and wrapping the workpiece, thereby ensuring the stability of the special-shaped workpiece during the processing and ensuring the accuracy of the workpiece during the processing; by installing the debris handling mechanism, the internal debris is cleaned after the matrix piston rod is contracted, thereby avoiding the accumulation of debris on the matrix piston rod affecting the subsequent smoothness of use, and also avoiding the internal hidden debris in the clamping process from scratching the clamped workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool processing, and in particular to a positioning tool for a numerically controlled machine tool. Background Art

[0002] In the prior art, there is a flexible universal positioner with a patent authorization announcement number of CN 213004854 U, which includes a base, a plurality of ejector assemblies and an ejector locking plate. The ejector assembly includes an ejector rod, a reset spring and an ejector rod sleeve. The ejector rod sleeve is fixed to the inner bottom of the base. The ejector rod vertically passes through the upper end surface of the base and is connected to the ejector rod sleeve through the reset spring. A magnetic portion is provided at one end of the ejector rod away from the base. An elastic device is symmetrically provided at one end of the magnetic portion on the side wall of the ejector rod. The ejector rod locking plate is provided between the ejector rod sleeve and the upper end surface of the base and is provided with a plurality of ejector rod locking holes for the ejector assemblies to pass through. A control handle is provided on the side wall of the base for pushing the ejector rod locking plate to slide in a horizontal direction. When the control handle is rotated, the ejector rod locking plate moves in a horizontal direction, and the side wall of the ejector rod locking hole is pressed against or away from the side wall of the ejector rod. The ejector rod has the advantages of being able to quickly read the surface data of the workpiece and conveniently realize the rapid clamping of the workpieces of the same batch.

[0003] Although the above scheme has the above advantages, the disadvantage of the above scheme is that during the positioning process, the debris of the workpiece will enter between the matrix push rods, and the debris will affect the smoothness of the push rods being pushed by the springs. In addition, limiting the push rod by squeezing one side of the push rod can easily cause the push rod to be unstable during the machine tool processing, thereby affecting the positioning processing accuracy. Summary of the invention

[0004] The present invention provides a positioning fixture for a numerically controlled machine tool to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A positioning tool for a numerically controlled machine tool, comprising a base and further comprising:

[0007] a moving mechanism mounted on top of the base;

[0008] A fitting clamping mechanism, which is installed on the front side of the moving mechanism and is used to fit the shape of the workpiece for clamping;

[0009] A debris handling mechanism, which is mounted on the moving mechanism and is used to handle the debris that falls into the fitting clamping mechanism during the workpiece processing;

[0010] The driving mechanism is installed between the debris processing mechanism and the laminating and clamping mechanism, and is used to drive the debris processing mechanism and the laminating and clamping mechanism to operate respectively.

[0011] Further, the moving mechanism includes a screw box fixed on the top of the base, a bidirectional screw is rotatably connected inside the screw box, two moving plates are provided on the external thread sleeve of the bidirectional screw, a motor is fixed on the right side of the screw box, an output end of the motor is fixedly connected to the bidirectional screw, a plurality of guide rods are fixed on the inner wall of the screw box, and one set of the moving plates is provided on the outside of the guide rods;

[0012] The motor 1 is electrically connected to the machine tool controller;

[0013] A magnet is fixed on the front side of the movable plate 1;

[0014] A curtain rod is fixed on the front side of the screw box, and a shielding curtain is sleeved on the curtain rod.

[0015] Furthermore, the fitting clamping mechanism includes a mounting plate fixed on the front side of the magnet, a hidden box is fixed on the side away from the two mounting plates, a plurality of oil cylinder outer tubes are symmetrically fixed inside the two mounting plates, a piston rod is sleeved inside the oil cylinder outer tube, and the oil cylinder outer tube is set inside the hidden box.

[0016] Furthermore, the fitting clamping mechanism also includes a second oil cylinder outer tube fixed on the top of the screw box, the left end of the second oil cylinder outer tube is connected to a multi-way connector, and the multi-way connector is connected to multiple oil pipes of the first oil cylinder outer tube;

[0017] The second outer tube of the oil cylinder is sleeved with a piston rod, an electromagnetic block is fixed to the right end of the second piston rod, a spring is fixed to the right side of the electromagnetic block, a mounting bracket is fixed to the other end of the spring, the mounting bracket is fixed to the top of the screw box, a laser sensor is fixed to the side of the mounting bracket facing the electromagnetic block, the electromagnetic block and the laser sensor are both electrically connected to the machine tool controller, a limit rod is sleeved inside the spring, the right end of the limit rod is fixedly connected to the mounting bracket, the left end of the limit rod is penetrated and sleeved inside the electromagnetic block, a rod hole is opened at the right end of the second piston rod, and the rod hole sleeves the limit rod inside during the movement of the second piston rod;

[0018] The rear side of the screw box is rotatably connected to a reciprocating screw rod 1, the right end of the reciprocating screw rod 1 is installed with a one-way gear 1, the external thread sleeve of the reciprocating screw rod 1 is provided with a movable plate 2, the front side of the movable plate 2 is close to the screw box, and an iron plate is provided on the top of the screw box, the front side of the movable plate 2 is fixedly connected to the iron plate, and the iron plate is inserted into the mounting frame during the movement.

[0019] Furthermore, the debris processing mechanism includes two support frames fixed on the rear side of the screw box, a reciprocating screw rod 2 is rotatably connected inside the support frames, a bevel gear 1 is fixed to the rear end of the reciprocating screw rod 2, a bevel gear 2 is meshed on the right side of the bevel gear 1, a rotating shaft is fixed inside the two bevel gears 2, the rotating shaft is rotatably connected to the inside of the two support frames, a one-way gear 2 is installed on the right end of the rotating shaft, the external threaded sleeve of the reciprocating screw rod 2 is provided with a Z-shaped moving frame, a mounting plate 2 is fixed to the bottom of the two Z-shaped moving frames, the external sleeve of the mounting plate 2 is provided with two sliding sleeves, a scraper is fixed to the bottom of the sliding sleeve, the scraper is attracted to adjacent magnets, and the two scrapers are symmetrically arranged.

[0020] Furthermore, the driving mechanism includes a motor fixing plate fixed to the rear side of the screw box, a motor 2 is fixed to the left side of the motor fixing plate, a gear is fixed to the output end of the motor 2, one side of the gear is meshed with the one-way gear 1, and the other side of the gear is meshed with the one-way gear 2, and the motor 2 is electrically connected to the machine tool controller.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention positions the workpiece by installing a fitting clamping mechanism and using hydraulic pressure to press and wrap the workpiece, thereby ensuring the stability of the special-shaped workpiece during the processing and ensuring the accuracy of the workpiece during the processing.

[0023] 2. The present invention installs a debris handling mechanism to clean up the internal debris after the matrix piston rod is retracted, thereby preventing the accumulation of debris on the matrix piston rod that affects the subsequent smoothness of use, and also preventing the hidden debris inside from scratching the workpiece being clamped during the clamping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the three-dimensional first-person structural perspective of a positioning tool for a CNC machine tool proposed by the present invention.

[0025] Figure 2 The present invention is a schematic diagram of the three-dimensional second-view structural view of a positioning tool for a CNC machine tool proposed by the present invention.

[0026] Figure 3 This is a schematic diagram of the three-dimensional third-view structure of a positioning tool for a CNC machine tool proposed by the present invention.

[0027] Figure 4 The present invention is a schematic diagram of the rear structural view of a positioning tool for a CNC machine tool.

[0028] Figure 5 The present invention is a schematic diagram of the internal structure of a hidden box of a positioning tool for a CNC machine tool.

[0029] Figure 6 The present invention is a schematic diagram of the internal structure of a screw box of a positioning tool for a CNC machine tool.

[0030] In the figure: 1, base; 2, moving mechanism; 21, screw box; 22, motor 1; 23, guide rod; 24, moving plate 1; 25, magnet; 26, curtain rod; 27, shielding curtain; 28, bidirectional screw; 3, fitting clamping mechanism; 31, mounting plate 1; 32, oil cylinder outer tube 1; 33, piston rod 1; 34, hidden box; 35, oil cylinder outer tube 2; 36, piston rod 2; 37, electromagnetic block; 38, spring; 39, limit rod; 310, mounting bracket; 311, laser sensor Sensor; 312, multi-way connector; 313, reciprocating screw rod 1; 314, one-way gear rod 1; 315, moving plate 2; 316, iron plate; 4, debris handling mechanism; 41, support frame; 42, rotating shaft; 43, one-way gear rod 2; 44, bevel gear rod 2; 45, reciprocating screw rod 2; 46, bevel gear rod 1; 47, Z-type moving frame; 48, mounting plate 2; 49, sleeve; 410, scraper; 5, driving mechanism; 51, motor fixing plate; 52, motor 2; 53, gear. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0034] Example: Refer to Figure 1-Figure 6 : A positioning tool for a CNC machine tool, comprising a base 1, and also comprising:

[0035] A moving mechanism 2, which is mounted on the top of the base 1;

[0036] A fitting clamping mechanism 3, which is installed on the front side of the moving mechanism 2 and is used to fit the shape of the workpiece for clamping;

[0037] A debris handling mechanism 4, which is mounted on the moving mechanism 2 and is used to handle the debris that falls into the fitting clamping mechanism 3 during the workpiece processing;

[0038] The driving mechanism 5 is installed between the debris processing mechanism 4 and the laminating and clamping mechanism 3, and is used to drive the debris processing mechanism 4 and the laminating and clamping mechanism 3 to operate respectively.

[0039] The moving mechanism 2 includes a screw box 21 fixed to the top of the base 1, a bidirectional screw 28 is rotatably connected inside the screw box 21, two moving plates 24 are sleeved on the external threads of the bidirectional screw 28, a motor 22 is fixed to the right side of the screw box 21, the output end of the motor 22 is fixedly connected to the bidirectional screw 28, a plurality of guide rods 23 are fixed to the inner wall of the screw box 21, and the moving plate 24 is sleeved on the outside of the guide rod 23;

[0040] The motor 1 22 is electrically connected to the machine tool controller;

[0041] A magnet 25 is fixed to the front side of the moving plate 1 24;

[0042] A curtain rod 26 is fixed to the front side of the screw box 21 , and a shielding curtain 27 is sleeved on the curtain rod 26 .

[0043] The fitting clamping mechanism 3 includes a mounting plate 31 fixed on the front side of the magnet 25, a hidden box 34 is fixed on the side away from the two mounting plates 31, a plurality of oil cylinder outer tubes 32 are symmetrically fixed inside the two mounting plates 31, a piston rod 33 is sleeved inside the oil cylinder outer tube 32, and the oil cylinder outer tube 32 is sleeved inside the hidden box 34.

[0044] The fitting clamping mechanism 3 also includes a second oil cylinder outer tube 35 fixed on the top of the screw box 21, and the left end of the second oil cylinder outer tube 35 is connected to a multi-way connector 312, and the multi-way connector 312 is connected to the oil pipes of multiple oil cylinder outer tubes 32;

[0045] The inner sleeve of the second oil cylinder outer tube 35 is provided with a second piston rod 36, the right end of the second piston rod 36 is fixed with an electromagnetic block 37, the right side of the electromagnetic block 37 is fixed with a spring 38, the other end of the spring 38 is fixed with a mounting bracket 310, the mounting bracket 310 is fixed to the top of the screw box 21, the side of the mounting bracket 310 facing the electromagnetic block 37 is fixed with a laser sensor 311, the electromagnetic block 37 and the laser sensor 311 are both electrically connected to the machine tool controller, the inner sleeve of the spring 38 is provided with a limit rod 39, the right end of the limit rod 39 is fixedly connected to the mounting bracket 310, the left end of the limit rod 39 is penetrated and sleeved inside the electromagnetic block 37, the right end of the second piston rod 36 is provided with a rod hole, and the rod hole sleeves the limit rod 39 inside during the movement of the second piston rod 36;

[0046] The rear side of the screw box 21 is rotatably connected to a reciprocating screw 313, the right end of the reciprocating screw 313 is installed with a one-way gear 314, the external thread sleeve of the reciprocating screw 313 is provided with a movable plate 2 315, the front side of the movable plate 215 is close to the screw box 21, and an iron plate 316 is provided on the top of the screw box 21, the front side of the movable plate 215 is fixedly connected to the iron plate 316, and the iron plate 316 is inserted into the mounting frame 310 during the movement.

[0047] The fitting clamping mechanism 3 positions the workpiece by closely fitting and wrapping the workpiece, thereby ensuring the stability of the special-shaped workpiece during the processing and ensuring the accuracy of the workpiece during the processing.

[0048] The debris handling mechanism 4 includes two support frames 41 fixed to the rear side of the screw box 21, a reciprocating screw 45 is rotatably connected inside the support frames 41, a bevel gear 46 is fixed to the rear end of the reciprocating screw 45, a bevel gear 44 is meshed on the right side of the bevel gear 46, a rotating shaft 42 is fixed inside the two bevel gears 44, the rotating shaft 42 is rotatably connected to the inside of the two support frames 41, a one-way gear 43 is installed on the right end of the rotating shaft 42, a Z-shaped moving frame 47 is provided on the external thread sleeve of the reciprocating screw 45, a mounting plate 48 is fixed to the bottom of the two Z-shaped moving frames 47, two sliding sleeves 49 are provided on the external sleeve of the mounting plate 48, a scraper 410 is fixed to the bottom of the sliding sleeve 49, the scraper 410 is attracted to the adjacent magnet 25, and the two scrapers 410 are symmetrically arranged;

[0049] The debris handling mechanism 4 cleans up the internal debris after the matrix piston rod is retracted, so as to prevent the accumulation of debris on the matrix piston rod and affect the subsequent smoothness of use, and also prevent the hidden debris inside from scratching the clamped workpiece during the clamping process.

[0050] The driving mechanism 5 includes a motor fixing plate 51 fixed to the rear side of the screw box 21, a motor 2 52 is fixed to the left side of the motor fixing plate 51, a gear 53 is fixed to the output end of the motor 2 52, one side of the gear 53 is meshed with the one-way gear 1 314, and the other side of the gear 53 is meshed with the one-way gear 2 43, and the motor 2 52 is electrically connected to the machine tool controller.

[0051] Working principle:

[0052] The device is installed on the processing platform of the machine tool through the base 1, and then the size of the part to be processed is input through the machine tool controller. Then the staff places the workpiece on the top of the base 1, and then the machine tool controller controls the motor 22 to drive the bidirectional screw 28 to rotate forward. The bidirectional screw 28 rotates forward to make the two moving plates 24 approach each other and drive the mounting plate 31, the cylinder outer tube 32, the piston rod 33 and the hidden box 34 to move. Part of the piston rod 33 on both sides of the workpiece contacts the outer surface of the workpiece. As the moving plate 24 continues to approach, the piston rod 33 in contact with the surface of the workpiece cannot continue to move, but the external cylinder outer tube 32 will continue to move with the mounting plate 31, so that the space between the piston rod 33 and the cylinder outer tube 32 is reduced. When the space is reduced, the hydraulic oil inside will enter the multi-way connector 31 through the pipeline. 2, and then enter between the oil cylinder outer tube 2 35 and the piston rod 2 36, pushing the piston rod 2 36 out of the oil cylinder outer tube 2 35. When the piston rod 2 36 moves, it pushes the electromagnetic block 37 to compress the spring 38, and the limiting rod 39 penetrates into the rod hole of the piston rod 2 36. The limiting rod 39 limits the spring 38 to prevent it from bending to one side. After the machine tool controller controls the moving plate 1 24 to move a specified distance, the piston rod 1 33 matrix on both sides wraps the outside of the workpiece, and then controls the electromagnetic block 37 to attract the iron plate 316. After being attracted, the piston rod 2 36 is limited, so as to maintain the stability of the hydraulic oil and limit the piston rod 1 33. After the limit, the piston rod 1 33 wraps the workpiece and limits it to achieve positioning. Then the machine tool processes the top of the workpiece. During the processing, the piston rod 1 33 keeps the workpiece stable to ensure the processing accuracy of the workpiece.

[0053] After the processing is completed, the motor 2 52 is started to drive the gear 53 to rotate forward. The forward rotation of the gear 53 satisfies the one-way gear 1 314 to drive the reciprocating screw 1 313 to rotate, so that the movable plate 2 315 drives the iron plate 316 to move, and the iron plate 316 drives the electromagnetic block 37 attracted thereto to move, and the electromagnetic block 37 pulls the piston rod 2 36 to move, and then compresses the spring 38, and the piston rod 2 36 moves through the multi-way connector 312 to draw the hydraulic oil in the multiple oil cylinder outer tubes 1 32 into the interior of the oil cylinder outer tube 2 35, and the hydraulic oil in the oil cylinder outer tube 1 32 The piston rod 33 is pulled to retract into the interior. When the piston rod 33 is fully retracted, the clamping of the workpiece is released. When the laser sensor 311 detects that the electromagnetic block 37 moves to the specified distance, it means that the piston rod 33 is fully retracted into the interior. Then the motor 2 52 is controlled to drive the gear 53 to reverse. The reversal of the gear 53 satisfies the direction of the rotation of the one-way gear 2 43 to drive the shaft 42 to rotate. The rotation of the shaft 42 drives the bevel gear 2 44 to rotate. The bevel gear 2 44 drives the bevel gear 1 46 and the reciprocating screw 2 45 to rotate. The reciprocating screw 2 45 rotates to move The Z-shaped moving frame 47 drives the mounting plate 2 48, the sleeve 49 and the scraper 410 to move forward, and scrapes the debris appearing after the piston rod 1 33 is retracted off the base 1. When scraping the debris, the scraper 410 will also push the workpiece forward off the base 1 to realize automatic unloading. After the Z-shaped moving frame 47 moves to the wire tail of the reciprocating screw 2 45, it drives the scraper 410 to return to its original position, so that it is attracted to the magnet 25 again. When the moving plate 1 24 drives the magnet 25 to approach or move away, the electromagnet 25 will drive the scraper 410 attracted to it to move, and the scraper 4 10 drives the sliding sleeve 49 to slide on the mounting plate 48. After the scraper 410 is completely reset, the machine tool controller turns off the electromagnetic block 37. The spring 38 pushes the electromagnetic block 37 and other structures to reset, so that the piston rod 33 is extended again. At the same time, the motor 22 is controlled to drive the bidirectional screw 28 to reverse, so that the two movable plates 24 are reset away. The motor 2 52 is controlled to drive the gear 53 to rotate forward, so that the movable plate 2 315 moves to the wire tail of the reciprocating screw 313 and then returns to its original position, so that the iron plate 316 is reset. After all the structures are reset, the next workpiece is processed.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A positioning fixture for a CNC machine tool, comprising a base (1), characterized in that: Also includes: A moving mechanism (2) mounted on the top of the base (1); A fitting clamping mechanism (3), which is mounted on the front side of the moving mechanism (2) and is used to fit the shape of the workpiece for clamping; A debris handling mechanism (4) is mounted on the moving mechanism (2) and is used to handle debris that falls into the fitting clamping mechanism (3) during the workpiece processing process; A driving mechanism (5) installed between the debris processing mechanism (4) and the laminating and clamping mechanism (3) and used to drive the debris processing mechanism (4) and the laminating and clamping mechanism (3) to operate respectively; The moving mechanism (2) comprises a screw box (21) fixed on the top of the base (1), the screw box (21) is internally rotatably connected with a bidirectional screw (28), the external thread of the bidirectional screw (28) is sleeved with two moving plates (24), a motor (22) is fixed on the right side of the screw box (21), the output end of the motor (22) is fixedly connected to the bidirectional screw (28), a plurality of guide rods (23) are fixed on the inner wall of the screw box (21), and the moving plate (24) is sleeved on the outside of the guide rods (23); The motor 1 (22) is electrically connected to the machine tool controller; A magnet (25) is fixed on the front side of the movable plate 1 (24); A curtain rod (26) is fixed to the front side of the screw box (21), and a shielding curtain (27) is sleeved on the curtain rod (26); The fitting clamping mechanism (3) comprises a mounting plate (31) fixed to the front side of the magnet (25), a hidden box (34) being fixed to the side away from the two mounting plates (31), a plurality of oil cylinder outer tubes (32) being symmetrically fixed inside the two mounting plates (31), a piston rod (33) being sleeved inside the oil cylinder outer tube (32), and the oil cylinder outer tube (32) being sleeved inside the hidden box (34); The fitting clamping mechanism (3) further comprises a second oil cylinder outer tube (35) fixed to the top of the screw box (21), the left end of the second oil cylinder outer tube (35) being connected to a multi-way connector (312), and the multi-way connector (312) being connected to oil pipes of a plurality of first oil cylinder outer tubes (32); A piston rod (36) is sleeved inside the second oil cylinder outer tube (35), an electromagnetic block (37) is fixed to the right end of the piston rod (36), a spring (38) is fixed to the right side of the electromagnetic block (37), a mounting frame (310) is fixed to the other end of the spring (38), the mounting frame (310) is fixed to the top of the screw box (21), a laser sensor (311) is fixed to the side of the mounting frame (310) facing the electromagnetic block (37), the electromagnetic block (37) and the laser sensor (311) are both electrically connected to the machine tool controller, a limiting rod (39) is sleeved inside the spring (38), the right end of the limiting rod (39) is fixedly connected to the mounting frame (310), the left end of the limiting rod (39) is penetrated and sleeved inside the electromagnetic block (37), a rod hole is opened at the right end of the piston rod (36), and the limiting rod (39) is sleeved inside the rod hole during the movement of the piston rod (36); The rear side of the screw box (21) is rotatably connected to a reciprocating screw rod 1 (313), the right end of the reciprocating screw rod 1 (313) is provided with a one-way gear rod 1 (314), the external thread sleeve of the reciprocating screw rod 1 (313) is provided with a movable plate 2 (315), the front side of the movable plate 2 (315) is closely attached to the screw box (21), an iron plate (316) is provided on the top of the screw box (21), the front side of the movable plate 2 (315) is fixedly connected to the iron plate (316), and the iron plate (316) is inserted into the mounting frame (310) during the movement process.

2. A positioning fixture for a CNC machine tool according to claim 1, characterized in that: The debris handling mechanism (4) comprises two support frames (41) fixed to the rear side of the screw box (21); a reciprocating screw rod (45) is rotatably connected to the interior of the support frames (41); a bevel gear (46) is fixed to the rear end of the reciprocating screw rod (45); a bevel gear (44) is meshed with a bevel gear (44) on the right side of the bevel gear (46); a rotating shaft (42) is fixed to the interior of the two bevel gears (44); and the rotating shaft (42) is rotatably connected to the interior of the two support frames (41). A one-way gear 2 (43) is mounted on the right end of the rotating shaft (42); a Z-shaped moving frame (47) is provided on the external threaded sleeve of the reciprocating screw 2 (45); a mounting plate 2 (48) is fixed to the bottom of the two Z-shaped moving frames (47); two sliding sleeves (49) are provided on the external sleeve of the mounting plate 2 (48); a scraper (410) is fixed to the bottom of the sliding sleeve (49); the scraper (410) attracts adjacent magnets (25); and the two scrapers (410) are symmetrically arranged.

3. A positioning tool for a CNC machine tool according to claim 2, characterized in that: The driving mechanism (5) comprises a motor fixing plate (51) fixed to the rear side of the screw box (21), a second motor (52) being fixed to the left side of the motor fixing plate (51), a gear (53) being fixed to the output end of the second motor (52), one side of the gear (53) being meshed with a one-way gear (314), and the other side of the gear (53) being meshed with a one-way gear (43), and the second motor (52) being electrically connected to a machine tool controller.

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