CN113458475A

CN113458475A - Cutter for milling of numerical control machine tool

Info

Publication number: CN113458475A
Application number: CN202110598620.XA
Authority: CN
Inventors: 段越; 汪兴杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-10-01

Abstract

The invention relates to the technical field of machine tool machining, in particular to a numerical control machine tool milling cutter, which comprises a cutter frame, wherein the upper end of the cutter frame is fixedly connected with a cutter handle through a plurality of bolts, one end of the cutter handle is provided with a cutter groove, the inside of the cutter groove is fixedly connected with a cutter head through a screw, a flow guide mechanism used for dissipating heat of the cutter head is arranged inside the cutter frame, a flow passage is arranged inside the cutter handle, and a throttling mechanism matched with the flow guide mechanism is arranged inside the flow passage. According to the invention, the cooling liquid is introduced into the flow guide pipe on one side through the water pump, and then the cooling liquid is sprayed to the tool bit at the front end of the tool handle through the spray pipe, and then the tool bit is cooled, so that the service life of the tool bit is prolonged, the flow passage is automatically opened and closed, the tool bit is automatically cooled, and then the inside of the tool handle is cooled, so that the tool bit can be cooled in all directions, the heat dissipation efficiency is improved, the liquid leakage condition can be avoided, and the stability of the tool bit is improved.

Description

Cutter for milling of numerical control machine tool

Technical Field

The invention relates to the technical field of machine tool machining, in particular to a cutter for milling of a numerical control machine tool.

Background

The numerical control machine tool is an automatic machine tool equipped with a program control system, the control system can logically process a program with control codes or other symbol instructions, decode the program, represent the decoded program by coded numbers, input the coded numbers into a numerical control device through an information carrier, send various control signals by the numerical control device through operation processing, control the action of the machine tool, and automatically process parts according to the shape and the size required by a drawing.

Prior patent (publication No. CN108723521A) is a thread milling tool comprising: the cutter consists of a cutter body, a blade and a locking screw; three surfaces of the blade are contacted with the cutter body, a threaded hole for locking the blade is arranged on the cutter body, an eccentric distance is reserved between the threaded hole and the center of the hole of the blade in the included angle direction of the two surfaces, and the blade is tightly locked on the cutter bar through the eccentric distance; it is characterized by also comprising: the center of the cutter is provided with a cold water hole, and the cold water holes are aligned to the positions of the cutter tips. When the invention is used for processing, only one edge of a single blade participates in cutting, the resistance is small, the rigidity requirement on a machine tool system is not as high as that of the traditional method, secondly, the blade belongs to a pan-screw thread blade, one blade corresponds to the processing of various thread specifications, so that the advantages of turning and milling are integrated, and meanwhile, one blade has four tool points and is matched with a machine-clamped cutter system, the tool changing is convenient, the repeated positioning precision is high, and the economy and the efficiency are high.

The thread milling cutter disclosed by the invention only fixes a plurality of groups of cutter heads at the front end of the cutter body to cut a workpiece, but after the cutter heads mill for a long time, the hardness of the cutting edge is reduced and the cutting performance is lost to cause abrasion due to cutting heat generated by severe plastic deformation and friction of metal, so that the service life of the cutter heads is further reduced.

Therefore, a milling tool for a numerical control machine tool is provided.

Disclosure of Invention

The invention aims to provide a milling cutter for a numerical control machine tool, which is characterized in that cooling liquid is introduced into a flow guide pipe on one side through a water pump, then the cooling liquid is sprayed to a cutter head at the front end of a cutter handle through a spray pipe, then the cutter head is cooled, the service life of the cutter head is further prolonged, a flow channel is automatically opened and closed, the cutter head is automatically cooled, and then the interior of the cutter handle is radiated, so that the cutter head can be cooled in all directions, the radiating efficiency is further improved, the liquid leakage condition can be avoided, the vibration of the cutter head during milling of a workpiece is reduced, the stability of the cutter head is further improved, and the problems in the background technology are solved.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a digit control machine tool cutter for milling process, includes the knife rest, the upper end of knife rest is through a plurality of bolt fixedly connected with handle of a knife, the one end of handle of a knife is equipped with the sword groove, screw fixedly connected with tool bit is passed through to the inside in sword groove, the inside of knife rest is equipped with and is used for carrying out radiating water conservancy diversion mechanism to the tool bit, the inside of handle of a knife is equipped with the runner with water conservancy diversion mechanism complex throttling mechanism, the inside of handle of a knife is equipped with smooth chamber, the inside in smooth chamber is equipped with and is used for carrying out radiating elastic mechanism to the bottom of tool bit, the both ends of runner all are equipped with the annular arch, the both ends of runner be equipped with respectively with two annular arch complex sealing mechanism that are used for preventing the liquid seepage.

Can let in cooling liquid to the inside of one side honeycomb duct through the water pump, then spout the tool bit department to the handle of a knife front end through the spray tube, then cool down the cooling to the tool bit, and then the life of extension tool bit, and carry out automatic opening and closing to the flow channel, cool down automatically to the tool bit, dispel the heat to the inside of handle of a knife again, make the tool bit can the omnidirectional cool off, and then improved the radiating efficiency, can also avoid appearing the condition of liquid seepage, and reduce the vibration that the tool bit appears when milling the work piece, and then improve the stability of tool bit.

Preferably, water conservancy diversion mechanism is including setting up in the inside device chamber of knife rest, the inside symmetry in device chamber is equipped with two pivots, two the outside of pivot is all rotated and is connected with special-shaped pole, two the pivot is equipped with torque spring, two respectively with the punishment of being connected of two special-shaped poles the one end fixedly connected with feeler lever respectively that special-shaped pole is close to each other, two the inside of special-shaped pole is inserted respectively and is equipped with the honeycomb duct, two the both ends of locating the runner are inserted respectively to the upper end of special-shaped pole, one side the one end of honeycomb duct is connected with the water pump, upper end one side of knife rest is equipped with spray tube, opposite side the one end of honeycomb duct is linked together with the bottom of spray tube.

Place the upper end at the knife rest with the handle of a knife, then the handle of a knife will press two feeler levers to remove, and then drive two dysmorphism poles and rotate round two pivots respectively, the both ends of runner can be inserted respectively to the upper end of two dysmorphism poles afterwards, the rethread bolt is fixed the handle of a knife, and let in cooling liquid to the inside of one side honeycomb duct through the water pump, then the honeycomb duct through runner and opposite side flows into the spray tube again, then spout the tool bit department to the handle of a knife front end through the spray tube, then cool down the cooling to the tool bit, absorb the produced cutting heat of tool bit and work piece friction, and then the life of extension tool bit.

Preferably, throttle mechanism is including setting up in the inside round cavity of handle of a knife, inside one side in round cavity is equipped with memory alloy silk, the one end fixedly connected with push pedal of memory alloy silk, one side fixedly connected with slide bar of push pedal, the inside of handle of a knife is equipped with the spout that is linked together with round cavity, the inner wall sliding connection of slide bar and spout, the inside of slide bar is equipped with and is used for carrying out the drain mouth of opening and close to the runner, the inside of handle of a knife still is equipped with the heat-conducting plate, the material of heat-conducting plate is copper metal.

When the cutter head mills a workpiece, a large amount of heat is generated due to friction, the heat is conducted by the heat conducting plate and then is transferred to the memory alloy wire in the circular cavity, when the heat is accumulated to a certain degree and reaches the metamorphosis temperature of the memory alloy wire, the memory alloy wire deforms and then pushes the push plate and the slide rod to move, so that the liquid guide port in the slide bar can conduct the flow channel, the cooling liquid can be sprayed out through the spray pipe, then the cutter head is cooled by heat dissipation, and then the temperature of the cutter head and the inner part of the round cavity is reduced, so that the memory alloy wire can be restored to the original state, and simultaneously the push plate and the slide rod are driven to reset, and then seal the runner for cooling liquid no longer spouts, and then can carry out automatic cooling to the tool bit, adopt pure machinery can improve the stability of whole device, a large amount of coolant liquid that also saves simultaneously.

Preferably, the elastic mechanism comprises a first magnet arranged on one side wall in the sliding cavity, the sliding cavity is further connected with a sliding plug in a sliding mode, one side of the sliding plug is fixedly connected with a second magnet which attracts the first magnet mutually, the other side of the sliding plug is elastically connected with the other side wall of the sliding cavity through a spring, two check valves which are communicated with the sliding cavity are further arranged in the knife handle, a liquid storage tank is arranged at the upper end of the knife handle, one side of the liquid storage tank is only allowed to enter the sliding cavity through the check valves, a heat dissipation channel communicated with the outside is arranged in the knife handle and below the knife slot, and the other side of the heat dissipation channel is only allowed to enter the liquid from the sliding cavity through the check valves.

When the tool bit mills the work piece, the heat-conducting plate can be with heat transfer to the inside first magnet department of sliding chamber, make first magnet demagnetization after being heated, and no longer attract the second magnet, second magnet and sliding plug can remove under the elasticity of spring afterwards, after spray tube blowout cooling liquid cooled down the tool bit, first magnet meets cold back magnetism and resumes, and then attract second magnet and sliding plug to reset, make sliding plug can be at the inside reciprocating motion of sliding chamber, sliding plug can cooperate with two check valves with the inside liquid suction sliding chamber of reservoir, and let in the radiating passage of sword groove below, dispel the heat to the inside of handle of a knife, make the tool bit can the omnidirectional cool off, and then improved the radiating efficiency.

Preferably, the sealing mechanism comprises a plurality of elastic air bags which are arranged at the upper end of the special-shaped rod at equal intervals, an annular air cushion is further arranged in an area where the outer wall of the upper end of the special-shaped rod is inserted into the flow channel, and the elastic air bags are communicated with the annular air cushion together.

Insert the inside of runner, pass through the bolt fastening back between handle of a knife and the knife rest in the upper end of dysmorphism pole, be close to each other between the upper end of dysmorphism pole and the annular arch to extrude a plurality of elastic air bags, then extrude the inside of annular air cushion with the inside gas of a plurality of elastic air bags, accomplish the sealed between runner and two dysmorphism pole outer walls, avoid appearing the condition of liquid leakage.

Preferably, the inner wall of the cutter groove is further provided with a bimetallic plate, the bimetallic plate is L-shaped, an active layer and a passive layer are arranged inside the bimetallic plate, the active layer is mainly made of manganese-nickel-copper alloy, nickel-chromium-iron alloy, nickel-manganese-iron alloy, nickel and the like, the passive layer is mainly made of nickel-iron alloy, and the content of nickel is 34-50%.

After the tool bit generates heat, the bimetallic plate in the tool groove is heated, the expansion coefficient of the active layer of the bimetallic plate is higher, the expansion coefficient of the passive layer of the bimetallic plate is lower, and the expansion coefficients between the two layers are not uniform so as to drive the bimetallic plate to deform, so that the bimetallic plate can extrude the tool bit in the tool groove, the vibration of the tool bit when the workpiece is milled is reduced, and the stability of the tool bit is improved.

Compared with the prior art, the invention has the beneficial effects that:

1. place the upper end at the knife rest with the handle of a knife, two feeler levers of handle of a knife pressure move, the both ends of runner can be inserted respectively to the upper end of two dysmorphism poles afterwards, and the rethread bolt is fixed the handle of a knife to let in cooling liquid through the water pump to the spray tube, then cool down the cooling to the tool bit, and then the life of extension tool bit.

2. Can produce a large amount of heats when the tool bit mills, can make memory alloy silk take place deformation then promote push pedal and slide bar and remove, switch on the flow channel, dispel the heat the cooling to the tool bit, memory alloy silk reconversion afterwards and drive push pedal and slide bar and reset, seal the flow channel, and then can carry out automatic cooling to the tool bit.

3. The heat-conducting plate can make first magnet demagnetization with heat transfer to first magnet department, second magnet and sliding plug can remove under the elasticity of spring afterwards, after cooling down the tool bit, first magnet magnetism resumes and drives second magnet and sliding plug and resets, make the sliding plug can be in the inside reciprocating motion of sliding chamber, the sliding plug can cooperate the liquid suction sliding chamber with the reservoir inside with two check valves, and let in the heat dissipation channel of sword groove below, dispel the heat to the inside of handle of a knife, make the tool bit can the omnidirectional cool off, and then the radiating efficiency has been improved.

4. Insert the inside back of runner in the upper end of dysmorphism pole, can extrude a plurality of elastic air bags, then extrude the inside of annular air cushion with the inside gas of a plurality of elastic air bags, accomplish the sealed between runner and two dysmorphism pole outer walls, avoid appearing the condition of liquid seepage.

5. After the tool bit generates heat, the bimetal plate positioned in the tool groove can be heated, the bimetal plate can extrude the tool bit in the tool groove, the vibration of the tool bit when the workpiece is milled is reduced, and the stability of the tool bit is improved.

Drawings

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

FIG. 2 is a top view of the internal structure of the present invention;

FIG. 3 is an external structural view of the shank of the present invention;

FIG. 4 is a schematic view of the internal structure of the tool holder of the present invention;

FIG. 5 is a schematic view of the present invention with the handle removed;

FIG. 6 is an enlarged view of the structure at A of the present invention;

FIG. 7 is an enlarged view of the structure of the present invention at B;

in the figure: 1. a tool holder; 2. a knife handle; 3. a cutter groove; 4. a cutter head; 5. a heat conducting plate; 6. a circular cavity; 7. memorizing alloy wires; 8. pushing the plate; 9. a slide bar; 10. a flow channel; 11. a liquid guide port; 12. a chute; 13. a device cavity; 14. a profiled bar; 15. a feeler lever; 16. a flow guide pipe; 17. a nozzle; 18. a rotating shaft; 19. a bimetallic plate; 20. a liquid storage tank; 21. a slide chamber; 22. a first magnet; 23. a second magnet; 24. a sliding plug; 25. a spring; 26. a one-way valve; 27. an annular projection; 28. an elastic air bag; 29. an annular air cushion.

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 "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 7, the present invention provides a tool for milling of a numerical control machine, which has the following technical scheme:

the utility model provides a digit control machine tool cutter for milling process, including knife rest 1, knife rest 1's upper end is through a plurality of bolt fixedly connected with handle of a knife 2, handle of a knife 2's one end is equipped with sword groove 3, screw fixedly connected with tool bit 4 is passed through to sword groove 3's inside, knife rest 1's inside is equipped with and is used for carrying out radiating water conservancy diversion mechanism to tool bit 4, handle of a knife 2's inside is equipped with runner 10, runner 10's inside is equipped with and constructs complex throttling mechanism with water conservancy diversion, handle of a knife 2's inside is equipped with smooth chamber 21, smooth chamber 21's inside is equipped with and is used for carrying out radiating elastic mechanism to tool bit 4's bottom, runner 10's both ends all are equipped with annular arch 27, runner 10's both ends are equipped with respectively with and prevent the sealing mechanism of liquid seepage with two annular arch 27 complex.

Can let in cooling liquid to the inside of one side honeycomb duct 16 through the water pump, then spout the tool bit 4 department to the 2 front ends of handle of a knife through spray tube 17, then cool down the cooling to tool bit 4, and then prolong the life of tool bit 4, and carry out automatic start and stop to runner 10, cool down automatically to tool bit 4, dispel the heat to the inside of handle of a knife 2 again, make tool bit 4 can the omnidirectional cool down, and then improved the radiating efficiency, can also avoid appearing the condition of liquid seepage, and reduce the vibration that tool bit 4 appears when milling the work piece, and then improve tool bit 4's stability.

As an embodiment of the present invention, referring to fig. 1, 4 and 5, the flow guiding mechanism includes a device cavity 13 disposed inside the tool holder 1, two rotating shafts 18 are symmetrically disposed inside the device cavity 13, special-shaped rods 14 are rotatably connected to the outsides of the two rotating shafts 18, a torsion spring is respectively sleeved at the joints of the two rotating shafts 18 and the two special-shaped rods 14, contact rods 15 are respectively and fixedly connected to the ends of the two special-shaped rods 14 close to each other, flow guiding pipes 16 are respectively inserted into the insides of the two special-shaped rods 14, the upper ends of the two special-shaped rods 14 are respectively inserted into the two ends of the flow channel 10, one end of the flow guiding pipe 16 on one side is connected to a water pump, one side of the upper end of the tool holder 1 is provided with a spray pipe 17, and one end of the flow guiding pipe 16 on the other side is communicated with the bottom of the spray pipe 17.

Place handle of a knife 2 in the upper end of knife rest 1, then handle of a knife 2 will press two feeler levers 15 to remove, and then drive two dysmorphism poles 14 and rotate round two pivot 18 respectively, the both ends of runner 10 can be inserted respectively to the upper end of two dysmorphism poles 14 afterwards, rethread bolt is fixed handle of a knife 2, and let in cooling liquid to the inside of one side honeycomb duct 16 through the water pump, then 16 reentrant spray tube 17 through the honeycomb duct of runner 10 and opposite side, then spout tool bit 4 department to 2 front ends of handle of a knife through spray tube 17, then cool down the cooling to tool bit 4, absorb the cutting heat that tool bit 4 and work piece friction produced, and then prolong the life of tool bit 4.

Referring to fig. 1, as an embodiment of the present invention, the throttling mechanism includes a circular cavity 6 disposed inside the tool holder 2, a memory alloy wire 7 is disposed on one side inside the circular cavity 6, a push plate 8 is fixedly connected to one end of the memory alloy wire 7, a slide bar 9 is fixedly connected to one side of the push plate 8, a slide groove 12 communicated with the circular cavity 6 is disposed inside the tool holder 2, the slide bar 9 is slidably connected to an inner wall of the slide groove 12, a liquid guide port 11 for opening and closing a flow passage 10 is disposed inside the slide bar 9, a heat conducting plate 5 is further disposed inside the tool holder 2, and the heat conducting plate 5 is made of copper.

When the tool bit 4 mills a workpiece, a large amount of heat is generated due to friction, the heat is conducted through the heat conducting plate 5 and then is transmitted to the memory alloy wire 7 inside the circular cavity 6, when the heat is gathered to a certain degree and reaches the abnormal temperature of the memory alloy wire 7, the memory alloy wire 7 deforms and then pushes the push plate 8 and the slide rod 9 to move, a liquid guide port 11 inside the slide rod 9 can conduct the flow channel 10, cooling liquid can be sprayed out through the spray pipe 17, the tool bit 4 is cooled in a heat dissipation manner, then the temperature inside the tool bit 4 and the circular cavity 6 is reduced, the memory alloy wire 7 can restore to the original state, the push plate 8 and the slide rod 9 are driven to reset at the same time, the flow channel 10 is further sealed, the cooling liquid is not sprayed out any more, the tool bit 4 can be automatically cooled, and the stability of the whole device can be improved by adopting a pure machine, and simultaneously saves a large amount of cooling liquid.

Referring to fig. 6, as an embodiment of the present invention, the elastic mechanism includes a first magnet 22 disposed on one side wall inside the sliding cavity 21, a sliding plug 24 is further slidably connected inside the sliding cavity 21, a second magnet 23 mutually attracted to the first magnet 22 is fixedly connected to one side of the sliding plug 24, the other side of the sliding plug 24 is elastically connected to the other side wall of the sliding cavity 21 through a spring 25, two check valves 26 mutually communicated with the sliding cavity 21 are further disposed inside the knife handle 2, a liquid storage tank 20 is disposed at the upper end of the knife handle 2, the check valve 26 on one side only allows liquid to enter the sliding cavity 21 from inside the liquid storage tank 20, a heat dissipation channel communicated with the outside is disposed inside the knife handle 2 below the knife slot 3, and the check valve 26 on the other side only allows liquid to enter the heat dissipation channel from the sliding cavity 21.

When the tool bit 4 mills a workpiece, the heat conducting plate 5 can transfer heat to the first magnet 22 inside the sliding cavity 21, so that the first magnet 22 is demagnetized after being heated, and is not attracted to the second magnet 23, then the second magnet 23 and the sliding plug 24 can move under the elastic force of the spring 25, when the nozzle 17 sprays cooling liquid to cool the tool bit 4, the first magnet 22 recovers magnetism after being cooled, and then the second magnet 23 and the sliding plug 24 are attracted to reset, so that the sliding plug 24 can move back and forth inside the sliding cavity 21, the sliding plug 24 can be matched with the two one-way valves 26 to pump the liquid inside the liquid storage tank 20 into the sliding cavity 21, and the liquid is introduced into the heat dissipation channel below the tool slot 3 to dissipate heat inside the tool holder 2, so that the tool bit 4 can be cooled in all directions, and further the heat dissipation efficiency is improved.

Referring to fig. 1, as an embodiment of the present invention, the sealing mechanism includes a plurality of elastic air bags 28 disposed at equal intervals at the upper end of the shaped rod 14, an annular air cushion 29 is further disposed at a region where the outer wall of the upper end of the shaped rod 14 is inserted into the flow passage 10, and the plurality of elastic air bags 28 are commonly communicated with the annular air cushion 29.

After the upper end of the special-shaped rod 14 is inserted into the flow channel 10 and the knife handle 2 and the knife rest 1 are fixed through bolts, the upper end of the special-shaped rod 14 is close to the annular bulge 27, the elastic air bags 28 are extruded, and then air in the elastic air bags 28 is extruded into the annular air cushion 29, so that the flow channel 10 and the outer walls of the two special-shaped rods 14 are sealed, and the liquid leakage is avoided.

Referring to fig. 1 and 2, as an embodiment of the present invention, a bimetal plate 19 is further disposed on an inner wall of the knife slot 3, the bimetal plate 19 is L-shaped, an active layer and a passive layer are disposed inside the bimetal plate 19, the active layer is mainly made of manganese-nickel-copper alloy, nickel-chromium-iron alloy, nickel-manganese-iron alloy, nickel, and the like, the passive layer is mainly made of nickel-iron alloy, and the content of nickel is 34 to 50%.

After tool bit 4 generates heat, the bimetallic plate 19 that is located sword groove 3 inside can be heated, and bimetallic plate 19's initiative layer expansion coefficient is higher, and its passive layer expansion coefficient is lower, because the expansion coefficient between two layers is inconsistent and then drive bimetallic plate 19 and take place deformation for bimetallic plate 19 can extrude tool bit 4 inside the sword groove 3, reduces the vibration that tool bit 4 appears when milling the work piece, and then improves tool bit 4's stability.

The working principle is as follows: firstly fixing a tool rest 1, then placing a tool holder 2 at the upper end of the tool rest 1, then pressing two feeler levers 15 by the tool holder 2 to move, further driving two special-shaped levers 14 to rotate around two rotating shafts 18 respectively, then inserting the upper ends of the two special-shaped levers 14 into two ends of a flow channel 10 respectively, fixing the tool holder 2 by bolts, introducing cooling liquid into a flow guide pipe 16 at one side by a water pump, then flowing into a spray pipe 17 through the flow channel 10 and the flow guide pipe 16 at the other side, then spraying to a tool bit 4 at the front end of the tool holder 2 by the spray pipe 17, then cooling the tool bit 4, generating a large amount of heat due to friction when the tool bit 4 mills a workpiece, transmitting the heat to a memory alloy wire 7 inside a circular cavity 6 by conduction of a heat conducting plate 5, and reaching the metamorphosis temperature of the memory alloy wire 7 after the heat is gathered to a certain degree, the memory alloy wire 7 deforms and then pushes the push plate 8 and the slide rod 9 to move, so that a liquid guide port 11 in the slide rod 9 can conduct a flow channel 10, cooling liquid can be sprayed out through a spray pipe 17, the tool bit 4 is cooled in a heat dissipation manner, then the temperature in the tool bit 4 and the temperature in the round cavity 6 can be reduced, the memory alloy wire 7 can restore to the original state, the push plate 8 and the slide rod 9 are driven to reset at the same time, the flow channel 10 is closed, the cooling liquid is not sprayed out any more, the tool bit 4 can be automatically cooled, when the tool bit 4 mills a workpiece, the heat conducting plate 5 can transfer heat to a first magnet 22 in the sliding cavity 21, the first magnet 22 is demagnetized after being heated, the second magnet 23 is not attracted any more, then the second magnet 23 and the sliding plug 24 can move under the elasticity of a spring 25, and after the tool bit 4 is cooled by spraying the cooling liquid through the spray pipe 17, the first magnet 22 is magnetically restored after being cooled, and then attracts the second magnet 23 and the sliding plug 24 to reset, so that the sliding plug 24 can reciprocate in the sliding cavity 21, the sliding plug 24 can be matched with the two one-way valves 26 to draw liquid in the liquid storage tank 20 into the sliding cavity 21 and enter the heat dissipation channel below the knife groove 3 to dissipate heat in the knife handle 2, the upper end of the special-shaped rod 14 is inserted into the flow channel 10, the knife handle 2 and the knife rest 1 are fixed through the bolts, the upper end of the special-shaped rod 14 is close to the annular protrusion 27 and extrudes the elastic air bags 28, then air in the elastic air bags 28 is extruded into the annular air cushion 29, sealing between the outer walls of the flow channel 10 and the two special-shaped rods 14 is completed, and liquid leakage is avoided.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a digit control machine tool cutter for milling, includes knife rest (1), its characterized in that: the upper end of the knife rest (1) is fixedly connected with a knife handle (2) through a plurality of bolts, one end of the knife handle (2) is provided with a knife groove (3), the interior of the knife groove (3) is fixedly connected with a knife head (4) through a screw, a flow guide mechanism for radiating the cutter head (4) is arranged in the cutter frame (1), a flow passage (10) is arranged in the knife handle (2), a throttling mechanism matched with the flow guide mechanism is arranged in the flow passage (10), a sliding cavity (21) is arranged in the knife handle (2), an elastic mechanism for dissipating heat of the bottom of the knife head (4) is arranged in the sliding cavity (21), both ends of runner (10) all are equipped with annular arch (27), the both ends of runner (10) are equipped with respectively and are used for preventing the sealing mechanism of liquid seepage with two annular arch (27) complex.

2. The milling tool for a numerical control machine tool according to claim 1, wherein: the water conservancy diversion mechanism is including setting up in inside device chamber (13) of knife rest (1), the inside symmetry in device chamber (13) is equipped with two pivot (18), two the outside of pivot (18) is all rotated and is connected with dysmorphism pole (14), two pivot (18) are equipped with torque spring, two with the junction of two dysmorphism poles (14) cover respectively the one end that dysmorphism pole (14) are close to each other is fixedly connected with feeler lever (15), two honeycomb duct (16), two are inserted respectively in the inside of dysmorphism pole (14) the both ends of locating runner (10), one side are inserted respectively in the upper end of dysmorphism pole (14) the one end of honeycomb duct (16) is connected with the water pump, upper end one side of knife rest (1) is equipped with spray tube (17), the opposite side the one end of honeycomb duct (16) communicates with the bottom of spray tube (17).

3. The milling tool for a numerical control machine tool according to claim 1, wherein: throttling mechanism is including setting up in inside round cavity (6) of handle of a knife (2), inside one side of round cavity (6) is equipped with memory alloy silk (7), one end fixedly connected with push pedal (8) of memory alloy silk (7), one side fixedly connected with slide bar (9) of push pedal (8), the inside of handle of a knife (2) is equipped with spout (12) that are linked together with round cavity (6), the inner wall sliding connection of slide bar (9) and spout (12), the inside of slide bar (9) is equipped with and is used for leading liquid mouth (11) opened and close runner (10), the inside of handle of a knife (2) still is equipped with heat-conducting plate (5), the material of heat-conducting plate (5) is metallic copper.

4. The milling tool for a numerical control machine tool according to claim 1, wherein: the elastic mechanism comprises a first magnet (22) arranged on one side wall in the sliding cavity (21), a sliding plug (24) is also connected inside the sliding cavity (21) in a sliding way, one side of the sliding plug (24) is fixedly connected with a second magnet (23) which is mutually attracted with the first magnet (22), the other side of the sliding plug (24) is elastically connected with the other side wall of the sliding cavity (21) through a spring (25), two one-way valves (26) communicated with the sliding cavity (21) are arranged in the knife handle (2), the upper end of the knife handle (2) is provided with a liquid storage tank (20), the one-way valve (26) at one side only allows liquid to enter the sliding cavity (21) from the inside of the liquid storage tank (20), a heat dissipation channel communicated with the outside is arranged below the cutter groove (3) in the cutter handle (2), and the one-way valve (26) on the other side only allows liquid to enter the heat dissipation channel from the sliding cavity (21).

5. The milling tool for a numerical control machine tool according to claim 2, wherein: the sealing mechanism comprises a plurality of elastic air bags (28) which are arranged at the upper end of the special-shaped rod (14) at equal intervals, an annular air cushion (29) is further arranged in an area where the outer wall of the upper end of the special-shaped rod (14) is inserted into the flow channel (10), and the elastic air bags (28) are communicated with the annular air cushion (29) together.

6. The milling tool for a numerical control machine tool according to claim 1, wherein: the inner wall of the cutter groove (3) is also provided with a bimetallic plate (19), and the bimetallic plate (19) is L-shaped.