CN112692376A

CN112692376A - Metal plate body cutting equipment

Info

Publication number: CN112692376A
Application number: CN202011514903.3A
Authority: CN
Inventors: 张海波
Original assignee: Individual
Current assignee: Shenzhen Geshile Technology Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-04-23
Anticipated expiration: 2040-12-21
Also published as: CN112692376B

Abstract

The invention discloses metal plate body cutting equipment, and relates to the technical field of metal processing equipment. The workpiece pressing device comprises a mounting frame, wherein a sliding frame is sleeved on the outer side of the mounting frame, a pressing mechanism is fixedly mounted on the inner side of the sliding frame, a workpiece is placed on the mounting frame, and a plurality of bulges for jacking the pressing mechanism are uniformly distributed on the outer side surface of the workpiece; the mounting frame is connected with the bracket through a limiting mechanism, the mounted bracket corresponds to the sliding frame, the bottom end of the bracket is provided with an interval adjustable mechanism, and the sliding frame drives the interval adjustable mechanism to move; a cutting part is rotatably arranged on the bracket, and a power part for driving the cutting part to rotate is also arranged on the bracket; the cutting part is internally provided with a chip removal assembly. According to the invention, the plurality of cutter bodies are annularly distributed between the two plate bodies through the cutting part, so that the cut scraps fall between the two plate bodies and are discharged through the pipe body communicated with the cavity formed by the two plate bodies, and the collection is convenient.

Description

Metal plate body cutting equipment

Technical Field

The invention belongs to the technical field of metal processing equipment, and particularly relates to metal plate body cutting equipment.

Background

The metal sheet aligns according to size and specification and cuts at the course of working, and the automatic cutout of metal sheet can be realized to current metal sheet cutting device, and in cutting process, can produce a large amount of sweeps, and the sweeps returns the sputtering of everywhere under the drive of cutting wheel, and this causes the injury to the workman easily.

Disclosure of Invention

The invention aims to provide metal plate cutting equipment, wherein a plurality of cutter bodies are annularly distributed between two plate bodies through a cutting part, so that cut debris falls between the two plate bodies, in addition, the cutter bodies are of a curved structure, air enters between the two plate bodies in the rotating process, so that a siphon effect is generated in the gap between the two plate bodies, the debris enters between the two plate bodies, the debris is discharged through a pipe body communicated with a cavity formed by the two plate bodies, the collection is convenient, and the related problems in the background art are solved.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a metal plate body cutting device which comprises a mounting rack, wherein a sliding frame is sleeved on the outer side of the mounting rack, a pressing mechanism is fixedly mounted on the inner side of the sliding frame, a workpiece is placed on the mounting rack, and a plurality of bulges for jacking the pressing mechanism are uniformly distributed on the outer side surface of the workpiece; the mounting frame is connected with the bracket through a limiting mechanism, the bracket after mounting corresponds to the sliding frame, the bottom end of the bracket is provided with an interval adjustable mechanism, and the sliding frame drives the interval adjustable mechanism to move; the bracket is rotatably provided with a cutting part, and meanwhile, the bracket is also provided with a power part for driving the cutting part to rotate; the cutting part internally mounted has the chip removal subassembly.

Furthermore, the mounting rack comprises slide rails, arch frames and supporting legs, a plurality of arch frames are mounted between the two parallel slide rails, and the supporting legs are fixedly mounted at the bottom ends of the slide rails; workpieces are placed on the arch frames; and a plurality of rollers are uniformly distributed on the convex surface of the arch frame.

Further, the pressing mechanism is positioned on the upper side of the arch frame; the pressing mechanism comprises a fixed rod and a pressing plate, the pressing plate is a curved plate, the convex surface of the curved plate is fixedly provided with the fixed rod, and the fixed rod is fixedly arranged on the sliding frame.

Furthermore, the carriage is the structure of falling the U-shaped, it has the spacing groove that corresponds with the carriage to open on the slide rail lateral surface, and the tip of the round pin body of installation passes the carriage and stretches into in the spacing groove.

Further, the bracket comprises a U-shaped frame and a mounting seat, the mounting seat is fixed on the inner side of the U-shaped frame, and a cutting part is rotatably mounted on the mounting seat.

Further, the top of U type frame is opened there is the mounting groove, the gag lever post that the slide rail lower extreme was equipped with passes in the up end of mounting groove stretches into the mounting groove, simultaneously spring one is installed to the bottom of gag lever post.

Furthermore, the distance adjustable mechanism comprises a rotating block, a cross rod and a connecting rod, wherein the bottom end of the bracket is provided with an installation groove, the rotating block positioned in the installation groove is rotatably installed between the two supporting legs, the cross rod is fixed on one side of the rotating block, one end of the rotating block is contacted with the side surface of the cross rod, the other end of the rotating block is movably connected with the connecting rod, and the other end of the connecting rod is hinged to a hinged seat arranged at the bottom end of the sliding frame;

the rotating block is of a shuttle-shaped structure, and the maximum angle formed by the hinged seat connected with the end part of the rotating block and the mounting surface of the sliding frame is 90 degrees.

Furthermore, the cutting part comprises circular plate bodies, cutter bodies, shaft bodies and pipe bodies, wherein a plurality of cutter bodies are annularly distributed between the two plate bodies, the shaft body is arranged on the outer side surface of one plate body, the pipe body is arranged on the outer side surface of the other plate body, and the pipe body is communicated with a cavity formed by the two plate bodies;

the cutter body is curved structure, and a plurality of the installation cutter body all is to same one side bending, and the tool bit of cutter body stretches out the plate body simultaneously.

Further, the chip removal subassembly includes lug and rotation portion, the inboard of cutter body is equipped with to the outstanding lug of cutter body bending direction, two rotate between the plate body and install rotation portion, the equipartition has a plurality of blades on the week side of rotation portion, the lateral motion of lug is followed to the outer tip of blade.

Further, the inboard of cutter body still installs and prevents stifled subassembly, prevent stifled subassembly includes fly leaf one, ejector pin and fly leaf two, the cell body has been opened to the concave surface structure medial extremity of cutter body, and the fly leaf one that upwards overturns is installed to this cell body internal rotation, the medial extremity face of cutter body is opened there is the open slot, fly leaf two is installed to the open slot internal rotation, communicate through the guide way between open slot and the cell body, slidable mounting has the ejector pin in the guide way, the one end and the fly leaf one contact of ejector pin, the other end and the contact of fly leaf two of ejector pin, simultaneously cup joint the spring two that makes ejector pin ejecting fly leaf two on the ejector pin.

The invention has the following beneficial effects:

1. the workpiece mounted in the invention moves along the arch-shaped frame, the radius of the inner side surface of the workpiece is the same as the radius of the outer side surface of the arch-shaped frame, so that the workpiece is tightly attached to the surface of the arch-shaped frame, the problems that the workpiece is easy to deform and the cutting error is large in the cutting process due to the gap between the workpiece and the arch-shaped frame for supporting are effectively solved, and in addition, a plurality of rollers are uniformly distributed on the convex surface of the arch-shaped frame, so that the sliding friction between the workpiece and the arch-shaped frame is changed into rolling friction, and the workpiece is convenient to push to move.

2. According to the invention, the cutting part is correspondingly arranged at the lower side of the pressing mechanism, and the pressing mechanism and the sliding frame are upwards jacked up through the bulge arranged on the workpiece, so that the pressing mechanism can tightly press the bulge, the workpiece is prevented from vibrating and dislocating in the process of cutting the bulge by the cutting part, and the processing precision is ensured.

3. After the workpiece is provided with the bulge jacking pressing mechanism and the sliding frame, the tail end of the sliding frame drives the interval adjustable mechanism to rotate through the installed connecting rod, namely the rotating block rotates, the inclined state is changed into the vertical state, so that the bracket is pushed, the cutting part installed on the bracket moves upwards, the workpiece is cut by the cutting part, the use of power components is effectively reduced, and the production cost of equipment is reduced.

4. According to the invention, the cutting part is provided with the plurality of cutter bodies annularly distributed between the two plate bodies, so that cut debris falls between the two plate bodies, in addition, the cutter bodies are of a curved structure, air enters between the two plate bodies in the rotating process, so that the gap between the two plate bodies generates a siphon effect, the debris is accelerated to enter between the two plate bodies, and the debris is discharged through the pipe body communicated with the cavity formed by the two plate bodies, so that the debris is convenient to collect.

5. According to the invention, the rotating part which is rotatably installed is pushed to rotate along the air entering between the two plate bodies by the cutter body, the blades arranged on the rotating part move along the side surface of the lug at the end part of the cutter body, so that the chips attached to the lug can be conveniently cleaned, in addition, the first movable plate, the second movable plate and the ejector rod which is in contact with the first movable plate and the second movable plate are arranged at the end part of the cutter body, the second movable plate is installed to extend out of the side surface of the lug, the rotating part rotates to push the second movable plate to retract, the ejector rod pushes the first movable plate to open, so that the chips at the port formed by the two adjacent cutter bodies can be extruded.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a schematic view of a partial cross-sectional structure of the present invention;

FIG. 4 is an enlarged schematic view of FIG. 3 at A according to the present invention;

FIG. 5 is an enlarged view of the structure of FIG. 4 at C according to the present invention;

FIG. 6 is an enlarged view of the structure at B of FIG. 3 according to the present invention;

FIG. 7 is a schematic view of a cutting portion according to the present invention;

in the drawings, the components represented by the respective reference numerals are listed below:

1-mounting rack, 101-sliding rail, 1011-limiting rod, 1012-limiting groove, 102-arch frame, 103-supporting leg, 1301-cross bar, 2-sliding rack, 201-hinging seat, 3-pressing mechanism, 301-fixing rod, 302-pressing plate, 4-bracket, 401-U-shaped plate, 4011-mounting groove, 4012-spring I, 402-mounting seat, 5-cutting part, 501-plate body, 502-cutter body, 5021-guide groove, 5022-open groove, 5023-spring II, 503-lug, 504-movable plate I, 505-top rod, 506-movable plate II, 507-rotating part, 5071-blade, 508-shaft body, 509-pipe body, 6-power part and 7-workpiece, 701-projection, 8-pin body, 9-turning block and 10-connecting rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

Referring to fig. 1-7, the present invention is a metal plate cutting apparatus, including an installation frame 1, the installation frame 1 includes slide rails 101, arch frames 102 and support legs 103, a plurality of arch frames 102 are installed between two parallel slide rails 101, the support legs 103 are fixedly installed at the bottom ends of the slide rails 101;

the workpieces 7 are placed on the plurality of arch frames 102; a plurality of rollers are uniformly distributed on the convex surface of the arch frame 102;

the installed workpiece 7 moves along the arch frame 102, the radius of the inner side surface of the workpiece 7 is the same as the radius of the outer side surface of the arch frame 102, so that the installed workpiece 7 is tightly attached to the surface of the arch frame 102, the problems that the workpiece 7 is easy to deform and the cutting error is large due to the fact that a gap exists between the workpiece 7 and the arch frame 102 for supporting, and in addition, a plurality of rollers are uniformly distributed on the convex surface of the arch frame 102, sliding friction between the workpiece 7 and the arch frame 102 is changed into rolling friction, and the workpiece 7 is convenient to push to move;

a sliding frame 2 is sleeved on the outer side of the mounting frame 1, a pressing mechanism 3 is fixedly mounted on the inner side of the sliding frame 2, a workpiece 7 is placed on the mounting frame 1, and a plurality of protrusions 701 for jacking the pressing mechanism 3 are uniformly distributed on the outer side surface of the workpiece 7;

the lower side of the pressing mechanism 3 is correspondingly provided with the pressing mechanism 3 and the sliding frame 2, which are installed by the cutting part 5 through the bulge 701 arranged on the workpiece 7, and the pressing mechanism 3 and the sliding frame 2 are upwards jacked, so that the pressing mechanism 3 compresses the bulge 701, the phenomenon that the workpiece is vibrated and dislocated in the process of cutting the bulge by the cutting part 5 is avoided, and the machining precision is ensured.

The pressing mechanism 3 is positioned on the upper side of the arch frame 102; the pressing mechanism 3 comprises a fixed rod 301 and a pressing plate 302, the pressing plate 302 is a curved plate, the fixed rod 301 is fixed on the convex surface of the curved plate, and the fixed rod 301 is fixedly arranged on the sliding frame 2;

the sliding frame 2 is of an inverted U-shaped structure, a limit groove 1012 corresponding to the sliding frame 2 is formed in the outer side face of the sliding rail 101, and the end part of the installed pin body 8 penetrates through the sliding frame 2 and extends into the limit groove 1012;

the mounting frame 1 is connected with a bracket 4 through a limiting mechanism, the mounted bracket 4 corresponds to the sliding frame 2, the bottom end of the bracket 4 is provided with an interval adjustable mechanism, and the sliding frame 2 drives the interval adjustable mechanism to move;

the bracket 4 comprises a U-shaped frame 401 and a mounting seat 402, the mounting seat 402 is fixed on the inner side of the U-shaped frame 401, and the cutting part 5 is rotatably mounted on the mounting seat 402;

the top end of the U-shaped frame 401 is provided with a mounting groove 4011, a limiting rod 1011 arranged at the lower end of the slide rail 101 penetrates through the upper end face of the mounting groove 4011 and extends into the mounting groove 4011, and meanwhile, the bottom end of the limiting rod 1011 is provided with a first spring 4012;

the distance adjustable mechanism comprises a rotating block 9, a cross bar 1031 and a connecting rod 10, a mounting groove 4011 is formed in the bottom end of the bracket 4, the rotating block 9 positioned in the mounting groove 4011 is rotatably mounted between the two support legs 103, the cross bar 1031 is fixed on one side of the rotating block 9, one end of the rotating block 9 is in contact with the side surface of the cross bar 1031, the other end of the rotating block 9 is movably connected with the connecting rod 10, and the other end of the connecting rod 10 is hinged to a hinge seat 201 arranged at the bottom end of the sliding frame 2;

after the protruding jack-up hold-down mechanism 3 and the carriage 2 that work piece 7 was equipped with, the connecting rod that carriage 2 was terminal through the installation drives interval adjustable mechanism and rotates, and turning block 9 rotates promptly, has the tilt state to become vertical state to promote bracket 4, and 5 upward movements of the cutting part of installation on the bracket 4, realize cutting part 5 to the cutting of work piece, the effectual use that reduces power component reduces the manufacturing cost of equipment.

The rotating block 9 is in a shuttle-shaped structure, and the maximum angle formed by the hinged seat 201 connected with the end part of the rotating block 9 and the mounting surface of the sliding frame 2 is 90 degrees;

a cutting part 5 is rotatably arranged on the bracket 4, meanwhile, a power part 6 for driving the cutting part 5 to rotate is also arranged on the bracket 4, the installed power part 6 is a motor, and the motor drives the cutting part 5 to rotate through a belt;

the cutting part 5 comprises circular plate bodies 501, cutter bodies 502, shaft bodies 508 and pipe bodies 509, wherein the cutter bodies 502 are annularly distributed between the two plate bodies 501, the shaft body 508 is arranged on the outer side surface of one plate body 501, the pipe body 509 is arranged on the outer side surface of the other plate body 501, and the pipe body 509 is communicated with a cavity formed by the two plate bodies 501;

the cutter body 502 is of a curved structure, a plurality of installed cutter bodies 502 are all bent towards the same side, and meanwhile, the cutter head of each cutter body 502 extends out of the plate body 501;

cutting portion 5 has a plurality of cutter bodies 502 through cyclic annular distribution between two plate bodies 501, realizes that the piece after the cutting falls into between two plate bodies 501, and cutter body 502 is curved shape structure in addition, makes the air admission between two plate bodies 501 at the pivoted in-process for two plate bodies 501's clearance produces siphonic effect, accelerates the piece to get into between two plate bodies 501, discharges through the body 509 with the cavity intercommunication of two plate body 501 formation, is convenient for collect.

A chip removal assembly is arranged in the cutting part 5; the chip removal assembly comprises a convex block 503 and a rotating part 507, the convex block 503 protruding towards the bending direction of the cutter body 502 is arranged on the inner side of the cutter body 502, the rotating part 507 is rotatably installed between the two plate bodies 501, a plurality of blades 5071 are uniformly distributed on the peripheral side surface of the rotating part 507, and the outer end parts of the blades 5071 move along one side surface of the convex block 503;

an anti-blocking assembly is further mounted on the inner side of the cutter body 502 and comprises a first movable plate 504, a first ejector rod 505 and a second movable plate 506, a groove body is formed in the end portion of the inner side of the concave surface structure of the cutter body 502, the first movable plate 504 is rotatably mounted in the groove body, an open groove 5022 is formed in the end face of the inner side of the cutter body 502, the second movable plate 506 is rotatably mounted in the open groove 5022, the open groove 5022 is communicated with the groove body through a guide groove 5021, the ejector rod 505 is slidably mounted in the guide groove 5021, one end of the ejector rod 505 is in contact with the first movable plate 504, the other end of the ejector rod 505 is in contact with the second movable plate 506;

the air entering between the two plate bodies 501 along the cutter body 502 pushes the rotating part 507 which is rotatably installed to rotate, the blades 5071 which are arranged on the rotating part 507 move along the side surface of the convex block 503 at the end part of the cutter body 502, so that the chips attached to the convex block 503 can be cleaned conveniently, in addition, the first movable plate 504, the second movable plate 506 and the ejector rod 505 which is in contact with the first movable plate 504 and the second movable plate 506 are installed at the end part of the cutter body 502, the second installed movable plate 506 extends out of the side surface of the convex block 503, the rotating part 507 rotates to push the second movable plate 506 to retract, the ejector rod 505 pushes the first movable plate 504 to open, the chips at the port formed by the two adjacent cutter bodies 502 are extruded, and the chips can.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A metal plate body cutting equipment, includes mounting bracket (1), its characterized in that:

the outer side of the mounting rack (1) is sleeved with a sliding rack (2), the inner side of the sliding rack (2) is fixedly provided with a pressing mechanism (3), a workpiece (7) is placed on the mounting rack (1), and a plurality of bulges (701) for jacking the pressing mechanism (3) are uniformly distributed on the outer side surface of the workpiece (7);

the mounting rack (1) is connected with a bracket (4) through an arranged limiting mechanism, the mounted bracket (4) corresponds to the sliding rack (2), an interval adjustable mechanism is mounted at the bottom end of the bracket (4), and the sliding rack (2) drives the interval adjustable mechanism to move;

a cutting part (5) is rotatably arranged on the bracket (4), and a power part (6) for driving the cutting part (5) to rotate is also arranged on the bracket (4);

the cutting part (5) is internally provided with a chip removal assembly.

2. A metal plate body cutting apparatus according to claim 1, wherein said mounting frame (1) comprises sliding rails (101), arches (102) and supporting legs (103), a plurality of arches (102) are mounted between two mutually parallel sliding rails (101), and the supporting legs (103) are fixedly mounted at the bottom ends of the sliding rails (101); a workpiece (7) is placed on the plurality of arch frames (102); a plurality of rollers are uniformly distributed on the convex surface of the arch frame (102).

3. A metal plate body cutting apparatus as claimed in claim 1, characterised in that said pressing means (3) are located on the upper side of the arch (102);

the pressing mechanism (3) comprises a fixing rod (301) and a pressing plate (302), the pressing plate (302) is a curved plate, the fixing rod (301) is fixed on the convex surface of the curved plate, and the fixing rod (301) is fixedly installed on the sliding frame (2).

4. A metal plate cutting apparatus as claimed in claim 1, wherein said carriage (2) is of inverted U-shaped configuration, said sliding track (101) being provided on its outer side with a limiting groove (1012) corresponding to the carriage (2), the end of the mounted pin (8) extending through the carriage (2) into the limiting groove (1012).

5. A metal plate body cutting apparatus according to claim 1, wherein said carriage (4) comprises a U-shaped frame (401) and a mounting seat (402), said mounting seat (402) being fixed to the inner side of said U-shaped frame (401), said mounting seat (402) having a cutting portion (5) rotatably mounted thereon.

6. The metal plate body cutting device according to claim 5, wherein a mounting groove (4011) is formed in the top end of the U-shaped frame (401), a limiting rod (1011) arranged at the lower end of the sliding rail (101) penetrates through the upper end face of the mounting groove (4011) and extends into the mounting groove (4011), and meanwhile a first spring (4012) is mounted at the bottom end of the limiting rod (1011).

7. The metal plate body cutting device according to claim 1, wherein the distance adjustable mechanism comprises a rotating block (9), a cross bar (1031) and a connecting rod (10), a mounting groove (4011) is formed in the bottom end of the bracket (4), the rotating block (9) positioned in the mounting groove (4011) is rotatably mounted between the two supporting legs (103), the cross bar (1031) is fixed on one side of the rotating block (9), one end of the rotating block (9) is in contact with the side surface of the cross bar (1031), the connecting rod (10) is movably connected to the other end of the rotating block (9), and the other end of the connecting rod (10) is hinged to a hinge seat (201) arranged at the bottom end of the sliding frame (2);

the rotating block (9) is of a shuttle-shaped structure, and the maximum angle formed by a hinged seat (201) connected with the end of the rotating block (9) and the mounting surface of the sliding frame (2) is 90 degrees.

8. The metal plate body cutting device according to claim 1, wherein the cutting portion (5) comprises a circular plate body (501), cutter bodies (502), shaft bodies (508) and a pipe body (509), wherein the cutter bodies (502) are annularly distributed between the two plate bodies (501), the shaft body (508) is mounted on the outer side surface of one plate body (501), the pipe body (509) is mounted on the outer side surface of the other plate body (501), and the pipe body (509) is communicated with a cavity formed by the two plate bodies (501);

the cutter body (502) is of a curved structure, a plurality of installed cutter bodies (502) are all bent towards the same side, and meanwhile, the cutter head of each cutter body (502) extends out of the plate body (501).

9. The metal plate body cutting device according to claim 8, wherein the chip removal assembly comprises a convex block (503) and a rotating part (507), the convex block (503) protruding towards the bending direction of the cutter body (502) is arranged on the inner side of the cutter body (502), the rotating part (507) is rotatably installed between the two plate bodies (501), a plurality of blades (5071) are uniformly distributed on the circumferential side surface of the rotating part (507), and the outer end parts of the blades (5071) move along one side surface of the convex block (503).

10. A metal plate body cutting apparatus according to claim 9, wherein said cutter body (502) is further mounted with an anti-clogging assembly on the inside thereof, the anti-blocking component comprises a first movable plate (504), a top rod (505) and a second movable plate (506), the end part of the inner side of the concave surface structure of the cutter body (502) is provided with a groove body, an upward turning movable plate I (504) is rotatably arranged in the groove body, an open slot (5022) is formed in the end face of the inner side of the cutter body (502), a second movable plate (506) is rotatably arranged in the open slot (5022), the open slot (5022) is communicated with the groove body through a guide groove (5021), a top rod (505) is slidably mounted in the guide groove (5021), one end of the top rod (505) is in contact with the first movable plate (504), the other end of the top rod (505) is in contact with the second movable plate (506), meanwhile, a second spring (5023) which enables the ejector rod (505) to eject out of the second movable plate (506) is sleeved on the ejector rod (505).