CN111531215A

CN111531215A - Gantry numerical control milling machine

Info

Publication number: CN111531215A
Application number: CN202010384287.8A
Authority: CN
Inventors: 王素莲
Original assignee: 王素莲
Current assignee: ECOM PRECISION MACHINERY Co.,Ltd.
Priority date: 2020-05-09
Filing date: 2020-05-09
Publication date: 2020-08-14
Anticipated expiration: 2040-05-09
Also published as: CN111531215B

Abstract

The invention discloses a gantry numerical control milling machine, which structurally comprises a sliding sleeve block, a support frame, a milling machine table, a fixing device, a movable groove, a sliding plate, a buckling block, a micro motor, a milling cutter head, an anti-collision cutter device, a sliding rail and a milling cutter, wherein when the gantry numerical control milling machine is used after improvement, a protection spring and a traction rod are matched with each other to adjust the width of a limiting groove, a processing workpiece is arranged on the movable plate and is buckled and connected with the milling machine table through an arc-shaped clamping block, so that the processing workpiece can be stably fixed on a processing position, and a gap on the milling machine table is subjected to air blowing treatment by an air blowing head, so that the cleanliness of the milling machine; milling cutter installs inside the anticollision groove, and hasp and holder cooperation are locked milling cutter, cooperate mutually with pull rod and arm-tie and carry out the tractive to the anticollision groove, with milling cutter pulling to certain height on, prevent the phenomenon of colliding with of milling cutter and processing part, protect milling cutter with buffer spring, reduce the pull rod and play impact when pulling milling cutter, improve milling machine's production efficiency.

Description

Gantry numerical control milling machine

Technical Field

The invention relates to the field of numerical control milling machines, in particular to a gantry numerical control milling machine.

Background

The milling machine is a machine tool for milling a workpiece by using a milling cutter, mainly refers to a machine tool for processing various surfaces on the workpiece by using the milling cutter, generally, the rotation motion of the milling cutter is a main motion, the movement of the workpiece and the milling cutter is a feed motion, a plane and a groove can be processed, various curved surfaces, gears and the like can also be processed, and the numerical control milling machine is a machine tool which integrates a numerical control system on a common milling machine and can accurately perform milling under the control of a program code. When the milling machine is in operation, the improvement is needed:

1. when the milling cutter is used for machining, a workpiece is directly placed on the milling machine and is not fixed, so that the workpiece can be displaced when the milling cutter is used for machining the workpiece, the milling cutter cannot evenly machine the workpiece, the machining effect of the workpiece is low, the position of the workpiece needs to be adjusted by a worker in real time, and the machining efficiency of the milling machine is reduced.

2. After the milling machine finishes processing a workpiece, the milling cutter cannot be adjusted to a certain height, so that the milling cutter is easy to collide with a processed part, the position collided with the milling cutter is damaged, defective products appear, the milling cutter can be damaged, particularly the milling cutter with poor toughness is scrapped, the production cost is increased, and the production efficiency is reduced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a gantry numerical control milling machine, which aims to solve the problems that when a milling cutter is used for processing, a workpiece is directly placed on the milling machine and is not fixed, so that when the milling cutter is used for processing the workpiece, the workpiece can be displaced, the milling cutter cannot uniformly process the workpiece, the processing effect of the workpiece is low, a worker is required to adjust the position of the workpiece in real time, and the processing efficiency of the milling machine is reduced; after the milling machine finishes processing a workpiece, the milling cutter cannot be adjusted to a certain height, so that the milling cutter is easy to collide with a processed part, the position collided with the milling cutter is damaged, defective products appear, the milling cutter can be damaged, particularly the milling cutter with poor toughness is scrapped, the production cost is increased, and the production efficiency can be reduced.

In order to achieve the purpose, the invention is realized by the following technical scheme: a gantry numerical control milling machine structurally comprises a sliding sleeve block, a support frame, a milling machine table, a fixing device, a movable groove, a sliding plate, a buckling block, a micro motor, a milling cutter head, an anti-collision cutter device, a sliding rail and a milling cutter, wherein the sliding sleeve block is fixedly embedded at the left end and the right end of the milling machine table, the fixing device is arranged at the upper end of the milling machine table, the milling machine table is fixedly arranged at the inner side of the support frame, the inner sides of the left end and the right end of the support frame are attached to the milling machine table, the movable groove is formed in the top of the support frame, the sliding plate and the sliding rail are arranged on the movable groove, the sliding rail is embedded at the front end of the movable groove, the milling cutter head is arranged at the front end of the movable groove, the micro motor is arranged at the rear end of the milling cutter head and communicated with the interior of the, the milling cutter is vertically embedded into the milling cutter head, and the milling cutter is connected with the anti-collision cutter device.

As a further improvement of the invention, the fixing device comprises an air blowing cavity, connecting pieces, telescopic rods, a positioning assembly, clamping rods and springs, wherein the springs are arranged in the air blowing cavity, the connecting pieces are arranged on the left side and the right side of the air blowing cavity, the air blowing cavity is arranged between the two telescopic rods, the clamping rods are arranged at the tops of the telescopic rods and vertically clamped in the telescopic rods, the positioning assembly is arranged at the middle position of the telescopic rods, and the positioning assembly is arranged at the top of the air blowing cavity.

As a further improvement of the invention, the air blowing cavity consists of an interface, a connecting cavity, an air blowing head, an air pipe and an adjusting block, the top of the interface is connected with the adjusting block, the adjusting block is arranged at the lower end of the connecting cavity, the top of the connecting cavity is embedded and embedded with the air pipe, the air pipe is communicated with the air blowing head, and the air blowing head is connected with the connecting cavity into a whole through the air pipe.

As a further improvement of the invention, the positioning assembly comprises a buckle, a blocking plate, an installation opening, a movable plate and arc-shaped clamping blocks, wherein the buckle is vertically embedded on the blocking plate, the blocking plate is installed on the left side and the right side of the movable plate, the installation opening is formed in the movable plate, the arc-shaped clamping blocks are arranged on two sides of the movable plate, and the arc-shaped clamping blocks are connected with the blocking plate through the movable plate.

As a further improvement of the invention, the movable plate comprises a traction rod, a shell, limiting grooves, a protection spring, a connecting piece and locking elements, wherein the left end and the right end of the traction rod are connected with the two limiting grooves, the limiting grooves are buckled with the protection spring, the outer sides of the limiting grooves are connected with the shell through the connecting piece, the locking elements are arranged in the middle of the side edges of the shell, and the front ends of the locking elements are attached to the limiting grooves.

As a further improvement of the invention, the anti-collision knife device comprises a knife lifting piece, a clamping device, a movable pulling piece, a positioning piece and an outer frame, wherein the knife lifting piece is vertically embedded in the outer frame, the knife lifting piece and the clamping device are connected into a whole through the outer frame, the outer frame is provided with the movable pulling piece and the positioning piece, and the movable pulling piece is connected with the knife lifting piece in a clamping connection mode.

As a further improvement of the invention, the cutter lifting element comprises a connecting seat, an anti-collision groove, an elastic rod, a pulling plate and a fixed block, wherein the pulling plate is arranged in the middle of the connecting seat and is connected to the connecting seat in a penetrating manner, the fixed block is arranged at the front end of the pulling plate and is embedded at the front end of the pulling plate, the anti-collision groove is arranged at the rear end of the pulling plate, and the anti-collision groove and the pulling plate are connected into a whole through the elastic rod.

As a further improvement of the invention, the clamping device comprises an outer ring, a fixed sliding rod, a clamping piece and a lock catch, wherein the fixed sliding rod is vertically embedded on the outer ring, the fixed sliding rod is movably connected with the clamping piece in a clamping manner, the lock catch is arranged on the left side and the right side of the clamping piece, and the lock catch is vertically embedded on the clamping piece.

As a further improvement of the invention, the elastic rod consists of a pull ring, a pull rod, a protection plate and a buffer spring, the pull ring is arranged at the bottom of the pull rod, the buffer spring is arranged in the pull rod, the protection plate is arranged at the top of the buffer spring, and the protection plate and the pull ring are connected on the same module.

Advantageous effects of the invention

The invention relates to a gantry numerical control milling machine, which has the following beneficial effects:

the width of the limiting groove is adjusted by mutually matching the protection spring and the traction rod, a processing workpiece is installed on the movable plate and is connected with the milling machine table through the arc-shaped clamping block in a buckling mode, the processing workpiece can be stably fixed on a processing position, the workpiece is prevented from being displaced, the processing effect of the workpiece is improved, a gap on the milling machine table is subjected to air blowing treatment through an air blowing head, the cleanliness of the milling machine table is guaranteed, and the working strength of workers is reduced.

Milling cutter runs through the gomphosis inside the anticollision groove, locks fixedly with hasp and holder cooperation to milling cutter, coordinates mutually with pull rod and arm-tie and carries out the tractive to the anticollision groove, with milling cutter pulling to certain height on, prevents the phenomenon of colliding with of milling cutter and processing part, protects milling cutter with buffer spring, reduces the pull rod and goes out the impact when pulling milling cutter, improves milling machine's production efficiency.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural diagram of a gantry numerically controlled milling machine of the present invention;

fig. 2 is a schematic plan view of the fixing device of the present invention.

Fig. 3 is a schematic view of the internal structure of the air blowing chamber of the present invention.

FIG. 4 is a schematic structural diagram of a positioning assembly according to the present invention.

Fig. 5 is a schematic view of the internal structure of the movable plate of the present invention.

Fig. 6 is a schematic structural view of the riving knife device of the present invention.

Fig. 7 is a schematic structural diagram of the knife lifting element of the present invention.

FIG. 8 is a schematic plan view of the clamp of the present invention.

Fig. 9 is a schematic view of the internal structure of the elastic rod of the present invention.

In the figure: a sliding sleeve block-1, a supporting frame-2, a milling machine table-3, a fixing device-4, a movable groove-5, a sliding plate-6, a buckling block-7, a micro motor-8, a milling head-9, an anti-collision knife device-10, a sliding rail-11, a milling cutter-12, an air blowing cavity-41, a connecting piece-42, an expansion link-43, a positioning component-44, a clamping rod-45, a spring-46, a connector-411, a connecting cavity-412, an air blowing head-413, an air pipe-414, an adjusting block-415, a buckle-441, a blocking plate-442, a mounting opening-443, a movable plate-444, an arc-shaped clamping block-445, a traction rod-4441, a shell-4442, a limiting groove-4443, a protective spring-4444, a connecting piece-4445, The tool comprises a locking element-4446, a cutter lifting element-101, a clamping device-102, a movable pulling element-103, a positioning element-104, an outer frame-105, a connecting seat-1011, an anti-collision groove-1012, an elastic rod-1013, a pulling plate-1014, a fixed block-1015, an outer ring-1021, a fixed sliding rod-1022, a clamping element-1023, a lock catch-1024, a pulling ring-1013 a, a pulling rod-1013 b, a protection plate-1013 c and a buffer spring-1013 d.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Example one

Referring to fig. 1, the present invention provides a technical solution: a gantry numerical control milling machine structurally comprises a sliding sleeve block 1, a support frame 2, a milling machine table 3, a fixing device 4, a movable groove 5, a sliding plate 6, a buckling block 7, a micro motor 8, a milling cutter head 9, an anti-collision cutter device 10, a sliding rail 11 and a milling cutter 12, wherein the sliding sleeve block 1 is fixedly embedded at the left end and the right end of the milling machine table 3, the fixing device 4 is arranged at the upper end of the milling machine table 3, the milling machine table 3 is fixedly arranged at the inner side of the support frame 2, the inner sides of the left end and the right end of the support frame 2 are attached to the milling machine table 3, the movable groove 5 is arranged at the top of the support frame 2, the sliding plate 6 and the sliding rail 11 are arranged on the movable groove 5, the sliding rail 11 is embedded at the front end of the movable groove 5, the milling cutter head 9 is arranged at the front end of the movable groove 5, the micro motor 8 is arranged at the rear end of the milling cutter, the milling machine is characterized in that the anti-collision cutter device 10 is arranged in the middle of the front end of the milling cutter head 9, the milling cutter 12 is vertically embedded into the milling cutter head 9, the milling cutter 12 is connected with the anti-collision cutter device 10, a workpiece to be machined is placed on the milling machine table 3, the sliding plate 6 drives the milling cutter head 9 to move left and right on the sliding rail 11, the milling cutter 12 can be aligned to the machined workpiece, and the machining efficiency of the milling machine is improved.

Referring to fig. 2, the fixing device 4 is composed of an air blowing cavity 41, connecting members 42, telescopic rods 43, a positioning assembly 44, a clamping rod 45 and springs 46, the springs 46 are arranged inside the air blowing cavity 41, the connecting members 42 are arranged on the left side and the right side of the air blowing cavity 41, the air blowing cavity 41 is installed between the two telescopic rods 43, the clamping rod 45 is arranged at the top of each telescopic rod 43, the clamping rod 45 is vertically clamped inside the telescopic rods 43, the positioning assembly 44 is arranged at the middle position of each telescopic rod 43, the positioning assembly 44 is arranged at the top of the air blowing cavity 41, a workpiece to be machined is installed on the positioning assembly 44, and the workpiece to be machined is fixed at a machining position through the matching of the clamping rod 45 and the telescopic rods 43, so that.

Referring to fig. 3, the air blowing cavity 41 is composed of an interface 411, a connecting cavity 412, an air blowing head 413, an air pipe 414 and a regulating block 415, the top of the interface 411 is connected with the regulating block 415, the regulating block 415 is arranged at the lower end of the connecting cavity 412, the top of the connecting cavity 412 is embedded and combined with the air pipe 414, the air pipe 414 is communicated with the air blowing head 413, the air blowing head 413 is connected with the connecting cavity 412 into a whole through the air pipe 414, air is conveyed into the connecting cavity 412 through the interface 411, the air is blown onto the milling machine table 3 through the air blowing head 413 by the air pipe 414, gaps in the milling machine table 3 are cleaned, labor force of workers is reduced, and cleaning efficiency of the milling machine table 3 is improved.

Referring to fig. 4, the positioning assembly 44 includes a buckle 441, a blocking plate 442, an installation opening 443, a movable plate 444, and arc-shaped retainers 445, the buckle 441 is vertically embedded in the blocking plate 442, the blocking plate 442 is installed on the left and right sides of the movable plate 444, the installation opening 443 is installed on the movable plate 444, the arc-shaped retainers 445 are installed on both sides of the movable plate 444, the arc-shaped retainers 445 are connected to the blocking plate 442 through the movable plate 444, connected to the left and right sides of the workpiece to be machined through the blocking plate 442, and clamped to the milling machine table 3 by the arc-shaped retainers 445 to fix the workpiece to be machined, so that the milling cutter 12 can stably machine the workpiece to be machined.

Referring to fig. 5, the movable plate 444 is composed of a pull rod 4441, a housing 4442, two limiting grooves 4443, a protection spring 4444, a connecting piece 4445 and a locking element 4446, the left and right ends of the pull rod 4441 are connected to the two limiting grooves 4443, the limiting grooves 4443 are buckled with the protection spring 4444, the outer side of the limiting grooves 4443 is connected to the housing 4442 through the connecting piece 4445, the locking element 4446 is arranged in the middle of the side of the housing 4442, the front end of the locking element 4446 is attached to the limiting grooves 4443, the position of the limiting grooves 4443 is adjusted by the mutual cooperation of the pull rod 4441 and the protection spring 4444 according to the area of the machined workpiece, so that the machined workpiece can be closely attached to the movable plate 444, the workpiece is prevented from displacement, and the machining effect of the workpiece is improved.

Referring to fig. 6, the cutter collision avoidance device 10 is composed of a cutter lifting piece 101, a clamp 102, a movable pull piece 103, a positioning piece 104 and an outer frame 105, the cutter lifting piece 101 is vertically embedded in the outer frame 105, the cutter lifting piece 101 and the clamp 102 are connected into a whole through the outer frame 105, the outer frame 105 is provided with the movable pull piece 103 and the positioning piece 104, the movable pull piece 103 is connected with the cutter lifting piece 101 in a clamping connection mode, the milling cutter 12 is installed on the cutter lifting piece 101, then the movable pull piece 103 is used for driving the cutter lifting piece 101 to move up and down, the position of the milling cutter 12 is adjusted, the phenomenon that the milling cutter collides with a machined part is prevented, and the machining quality of the machined part is guaranteed.

Example two

Referring to fig. 7, the cutter lifting element 101 includes a connecting seat 1011, an anti-collision groove 1012, an elastic rod 1013, a pulling plate 1014, and a fixing block 1015, wherein the pulling plate 1014 is disposed in the middle of the connecting seat 1011, the pulling plate 1014 is connected to the connecting seat 1011 in a penetrating manner, the fixing block 1015 is disposed at the front end of the pulling plate 1014, the fixing block 1015 is embedded in the front end of the pulling plate 1014, the anti-collision groove 1012 is disposed at the rear end of the pulling plate 1014, the anti-collision groove 1012 is connected with the pulling plate 1014 by the elastic rod 1013, the milling cutter 12 is vertically embedded in the anti-collision groove 1012, the elastic rod 1013 and the pulling plate 1014 cooperate with each other to drive the anti-collision groove 1012 to move, the machined milling cutter 12 is adjusted to a certain height, and.

Referring to fig. 8, the clamping device 102 includes an outer ring 1021, a fixed sliding rod 1022, a clamping member 1023, and latches 1024, wherein the fixed sliding rod 1022 is vertically embedded in the outer ring 1021, the fixed sliding rod 1022 is movably engaged with the clamping member 1023, the latches 1024 are disposed on both sides of the clamping member 1023, the latches 1024 are vertically embedded in the clamping member 1023, the clamping member 1023 moves on the fixed sliding rod 1022 and is fixedly attached to an outer wall of the milling cutter 12, and then the latches 1024 are used to lock and connect the clamping member 1023 to the milling cutter 12 to lock and fix the milling cutter 12, so as to prevent the milling cutter 12 from slipping off during operation and improve the working efficiency of the milling cutter 12.

Referring to fig. 9, the elastic rod 1013 comprises a pull ring 1013a, a pull rod 1013b, a protection plate 1013c and a buffer spring 1013d, the pull ring 1013a is disposed at the bottom of the pull rod 1013b, the buffer spring 1013d is disposed inside the pull rod 1013b, the protection plate 1013c is disposed at the top of the buffer spring 1013d, the protection plate 1013c and the pull ring 1013a are connected to a same module, the pull ring 1013a is engaged with the front end of the anti-collision groove 1012, the elastic rod 1013 and the pull plate 1014 cooperate with each other to pull the milling cutter 12, and the protection is performed by the buffer spring 1013d, so as to prevent the milling cutter 12 from being hit due to pulling force, thereby protecting the milling cutter 12, reducing the production cost of the milling machine, and improving.

The working principle of the above technical solution is explained as follows:

when the milling machine is used, a workpiece to be machined is placed on the milling machine table 3, the workpiece to be machined is fixedly installed through the fixing device 4, the milling head 9 is installed on the sliding plate 6 through the buckling block 7, the sliding plate 6 drives the milling head 9 to move left and right on the sliding rail 11, the milling cutter 12 can be aligned to the workpiece to be machined, and the workpiece to be machined is machined through the milling cutter 12.

Before processing a workpiece, a limiting groove 4443 is connected with a shell 4442 through a connecting piece 4445, the width of the limiting groove 4443 is adjusted by mutually matching a protective spring 4444 and a pull rod 4441, then the limiting groove 4443 is fixed on the adjusted position by a locking element 4446, the workpiece is parallelly arranged on an adjusted movable plate 444, the workpiece is fixed by matching a baffle plate 442 and the limiting groove 4443, the workpiece is buckled and connected with a milling machine table 3 through an arc-shaped fixture block 445, so that the workpiece can be stably fixed on the processed position, the workpiece can be prevented from displacement, a milling cutter can uniformly process the workpiece, the processing effect of the workpiece is improved, gas is conveyed to a blowing head 413 through a gas pipe 414 through an interface 411, the gap on the milling machine table 3 is blown by the blowing head 413, and the gap in the milling machine table 3 is cleaned, the scraps after processing are prevented from remaining on the milling machine table 3, the cleanliness of the milling machine table 3 is ensured, and the working strength of workers is reduced.

After the milling machine processes a workpiece, the connecting seat 1011 is fixedly installed on the milling head 9, the milling cutter 12 penetrates and is embedded inside the anti-collision groove 1012, the clamping piece 1023 moves on the fixed sliding rod 1022, so that the clamping piece 1023 can be fixedly attached to the outer wall of the milling cutter 12, then the clamping piece 1023 is locked and connected to the milling cutter 12 through the lock catch 1024, the milling cutter 12 is locked and fixed, the milling cutter 12 is prevented from sliding off from the anti-collision groove 1012 during operation, the anti-collision groove 1012 is pulled through the mutual matching of the pull rod 1013b and the pull plate 1014, the milling cutter 12 is pulled to a certain height, the collision phenomenon between the milling cutter 12 and a processed part is prevented, then the milling cutter 12 is fixed at the pulled position through the fixing block 1015, the buffering spring 1013d is used for protecting the milling cutter 12, the impact force generated when the pull rod 1013b pulls the milling cutter 12 is reduced, the damage phenomenon of the milling cutter 12, the production efficiency is improved.

The milling cutter solves the problems that when the milling cutter is used for processing, a workpiece is directly placed on the milling machine and is not fixed, so that when the milling cutter is used for processing the workpiece, the workpiece can be displaced, the milling cutter cannot uniformly process the workpiece, the processing effect of the workpiece is low, a worker is required to adjust the position of the workpiece in real time, and the processing efficiency of the milling machine is reduced; after the milling machine finishes processing the workpiece, the milling cutter cannot be adjusted to a certain height, so that the milling cutter is easy to collide with a processed part, so that the position collided with the milling cutter is damaged, defective products are generated, the milling cutter can be damaged, especially the milling cutter with poor toughness, the scrapping of the movable plate increases the production cost and reduces the production efficiency, the combined structure of the parts can realize that the width of the limit groove is adjusted by the mutual matching of the protective spring and the traction rod, the processed workpiece is arranged on the movable plate, the arc-shaped clamping block is buckled and connected with the milling machine table, so that a machining workpiece can be stably fixed at a machining position, the workpiece can be prevented from displacement, the machining effect of the workpiece is improved, a gap on the milling machine table is subjected to air blowing treatment by the air blowing head, the cleanliness of the milling machine table is ensured, and the working strength of workers is reduced; milling cutter runs through the gomphosis inside the anticollision groove, locks fixedly with hasp and holder cooperation to milling cutter, coordinates mutually with pull rod and arm-tie and carries out the tractive to the anticollision groove, with milling cutter pulling to certain height on, prevents the phenomenon of colliding with of milling cutter and processing part, protects milling cutter with buffer spring, reduces the pull rod and goes out the impact when pulling milling cutter, improves milling machine's production efficiency.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a planer-type numerically controlled fraise machine, its structure includes sliding sleeve piece (1), support frame (2), milling machine platform (3), fixing device (4), activity groove (5), sliding plate (6), lock piece (7), micro motor (8), milling cutter head (9), anticollision sword device (10), slide rail (11), milling cutter (12), its characterized in that:

the sliding sleeve block (1) is fixed on a milling machine table (3), the milling machine table (3) is provided with a fixing device (4), the support frame (2) is attached to the milling machine table (3), the sliding plate (6) and the sliding rail (11) are arranged in a movable groove (5), the micro motor (8) is communicated with a milling cutter head (9), the buckling block (7) is buckled on the movable groove (5), and the milling cutter (12) is connected with an anti-collision cutter device (10);

the fixing device (4) is composed of an air blowing cavity (41), a connecting piece (42), an expansion link (43), a positioning component (44), a clamping rod (45) and a spring (46), wherein the spring (46) is arranged on the air blowing cavity (41), the connecting piece (42) is fixed on the air blowing cavity (41), the clamping rod (45) is clamped on the expansion link (43), and the positioning component (44) is arranged in the middle of the expansion link (43).

2. The gantry numerically controlled milling machine according to claim 1, wherein: the blowing cavity (41) is composed of an interface (411), a connecting cavity (412), a blowing head (413), an air pipe (414) and a regulating block (415), the interface (411) is connected with the regulating block (415), and the blowing head (413) is connected with the connecting cavity (412) into a whole through the air pipe (414).

3. The gantry numerically controlled milling machine according to claim 1, wherein: the positioning assembly (44) comprises a buckle (441), a blocking plate (442), an installation opening (443), a movable plate (444) and an arc-shaped fixture block (445), the buckle (441) is installed on the blocking plate (442), the installation opening (443) is arranged on the movable plate (444), and the arc-shaped fixture block (445) is connected with the blocking plate (442) through the movable plate (444).

4. A gantry numerically controlled milling machine according to claim 3, wherein: the movable plate (444) is composed of a traction rod (4441), a shell (4442), a limiting groove (4443), a protection spring (4444), a connecting piece (4445) and a locking element (4446), the traction rod (4441) is connected with the limiting groove (4443), the limiting groove (4443) is buckled with the protection spring (4444), the limiting groove (4443) is connected with the shell (4442) through the connecting piece (4445), and the shell (4442) is provided with the locking element (4446).

5. The gantry numerically controlled milling machine according to claim 1, wherein: the utility model discloses a crashproof sword device (10) is by lifting up sword piece (101), binding clasp (102), activity and drawing piece (103), setting element (104), frame (105) and constitute, it is as an organic whole through frame (105) with binding clasp (102) to lift sword piece (101), frame (105) are equipped with activity and draw piece (103) and setting element (104).

6. A gantry numerically controlled milling machine according to claim 5, characterized in that: the knife lifting piece (101) is composed of a connecting seat (1011), an anti-collision groove (1012), an elastic rod (1013), a pulling plate (1014) and a fixing block (1015), the connecting seat (1011) is provided with the pulling plate (1014), the fixing block (1015) is installed at the front end of the pulling plate (1014), and the anti-collision groove (1012) and the pulling plate (1014) are connected into a whole through the elastic rod (1013).

7. A gantry numerically controlled milling machine according to claim 5, characterized in that: the clamp (102) is composed of an outer ring (1021), a fixed sliding rod (1022), a clamping piece (1023) and a lock catch (1024), the fixed sliding rod (1022) is connected with the outer ring (1021), and the clamping piece (1023) is provided with the lock catch (1024).

8. A gantry numerically controlled milling machine according to claim 6, characterized in that: the elastic rod (1013) consists of a pull ring (1013a), a pull rod (1013b), a protection plate (1013c) and a buffer spring (1013d), wherein the pull ring (1013a) is arranged on the pull rod (1013b), and the buffer spring (1013d) is attached to the protection plate (1013 c).