CN112676630A - Carbon deposition-resistant and cracking-resistant thermal expansion knife handle and manufacturing method thereof - Google Patents

Carbon deposition-resistant and cracking-resistant thermal expansion knife handle and manufacturing method thereof Download PDF

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Publication number
CN112676630A
CN112676630A CN202011285417.9A CN202011285417A CN112676630A CN 112676630 A CN112676630 A CN 112676630A CN 202011285417 A CN202011285417 A CN 202011285417A CN 112676630 A CN112676630 A CN 112676630A
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China
Prior art keywords
handle
thermal expansion
knife
resistant
hole
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CN202011285417.9A
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Chinese (zh)
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刘旭
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刘旭
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Priority to CN202011285417.9A priority Critical patent/CN112676630A/en
Publication of CN112676630A publication Critical patent/CN112676630A/en
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Abstract

The invention adopts the technical scheme that the anti-carbon-deposition anti-cracking thermal expansion knife handle comprises a knife handle body, wherein an inner hole for mounting a knife is formed in the knife handle body, and the knife handle body outside the inner hole is made of 53Cr21Mn9Ni 4N. The thermal expansion tool shank can reach the standards of no carbon deposition or micro carbon deposition, rust prevention and small-aperture thermal expansion series, the product does not crack after being heated to 700 ℃ at high temperature, and the milling cutter can be normally assembled and disassembled at 300 ℃.

Description

Carbon deposition-resistant and cracking-resistant thermal expansion knife handle and manufacturing method thereof
Technical Field
The invention relates to a thermal expansion knife handle, in particular to an anti-carbon deposition and anti-cracking thermal expansion knife handle and a manufacturing method thereof.
Background
The heat expander handle was originally sourced from europe and america as well as japan. The thermal expansion knife handle is mainly applied to the fields of aerospace, electronic products and machining high precision, is mainly installed on a machining center and a multi-shaft high-speed numerical control milling machine during use, and particularly has outstanding capacity during deep cavity machining in the mold industry.
The thermal expansion tool holder has the function of clamping the tool by rapidly heating the tool holder to 300-400 ℃ through the electromagnetic induction heater or the hot air heater so as to enable the tolerance value between the thermal deformation amount of the thermal expansion material and the thermal deformation amount of the clamped tungsten steel alloy bar. The hot-work die steel materials SKD61 Japan brand, H13 US brand, 4Cr5MoSi V1 China brand, special stainless steel independently developed by Japan, domestic SUS630 and GH2132 high-temperature alloy materials and the like are mostly used abroad and domestically. The thermal expansion handle of a knife can not control the temperature factor because of the heater, often heat to between 300-.
The European and American heat expansion tool shank belongs to the problems that carbon deposition is easy to generate, rust is easy to generate, the small-bore heat expansion coefficient is low after alloy steel series is heated at high temperature, a milling cutter is difficult to assemble and take, the heating is excessive, and the like, and Japanese products belong to special stainless steel and solve some problems of the European and American alloy steel, but the products are easy to crack and scrap after being fed back in the domestic market and used for a period of time, and market research finds that the service life is not equal from 200 times to 2000 times, and the cracking of the products is caused. The service life of the advertisement can not be reached and can not be promoted for more than 2000 times.
Disclosure of Invention
Aiming at the problems, the invention aims to provide the anti-carbon-deposition anti-cracking thermal expansion knife handle and the manufacturing method thereof, so that the thermal expansion knife handle can resist high-temperature carbon deposition and rust, a product does not crack in the using process, and the service life is further prolonged.
The invention adopts the technical scheme that the anti-carbon-deposition anti-cracking thermal expansion knife handle comprises a knife handle body, wherein an inner hole for mounting a knife is formed in the knife handle body, and the knife handle body outside the inner hole is made of 53Cr21Mn9Ni 4N.
Preferably, the handle of a knife body formula handle of a knife as an organic whole, including front end thermal expansion portion and rear end connecting portion that welds each other together, the hole is located front end thermal expansion portion, the material of front end thermal expansion portion is 53Cr21Mn9Ni4N, the material of rear end connecting portion is 20CrMnTi or 42 CrMo.
Preferably, the handle of a knife body is split type handle of a knife, including the metal connection handle of the hot expanding bar of front end and rear end, the connection can be dismantled in the metal connection handle to the hot expanding bar rear end, the material of hot expanding bar is 53Cr21Mn9Ni 4N.
Preferably, the rear end of the hot expansion rod is connected into the metal connecting handle through a threaded structure.
The manufacturing method of the anti-carbon-deposition anti-cracking thermal expansion knife handle is realized by the following steps:
firstly, cutting a raw material to a required length by a sawing machine;
roughly turning the outer surface of the numerical control lathe;
drilling by a numerical control milling machine;
fourthly, the hardness of the heat treatment product is HRC36-40 degrees, and the residual stress of the heat treatment product is removed to ensure that the finished product is not deformed when being heated and applied;
finish turning the product surface to a standard size by a precision numerical control lathe;
sixthly, performing precise numerical control external grinding, wherein the external circle is coarsely ground, then the product is finely ground to a standard size, and the taper and roundness verticality of the product are controlled within 0.003 by a universal precise detection instrument;
seventhly, grinding the inner hole to the required standard size by using a precise CNC (computer numerical control) internal grinding machine, and detecting the tolerance, roundness and verticality of the inner hole by using a general precise detection instrument to reach the standard;
eighthly, cleaning the knife handle, cleaning and tidying, cleaning the finished product, and then sorting and packaging to obtain a qualified product.
The thermal expansion tool shank can reach the standards of no carbon deposition or micro carbon deposition, rust prevention and small-aperture thermal expansion series, the product does not crack after being heated to 700 ℃ at high temperature, and the milling cutter can be normally assembled and disassembled at 300 ℃.
Drawings
FIG. 1 is a schematic structural view of an integrated thermal expansion tool shank of the present invention;
FIG. 2 is a schematic structural view of the split type thermal expansion tool shank of the present invention;
wherein: 1, a knife handle body; 2, inner holes; 3-front end thermal expansion; 4-rear end connection; 5, hot expanding rod; 6-metal connecting handle.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the invention provides an anti-carbon deposition and anti-cracking thermal expansion tool holder, which comprises a tool holder body 1, wherein an inner hole 2 for mounting a tool is formed in the tool holder body 1, and the tool holder body 1 on the outer side of the inner hole 2 is made of 53Cr21Mn9Ni 4N.
Preferably, the tool holder body 1 is an integral tool holder, as shown in fig. 1, and includes a front end thermal expansion portion 3 and a rear end connecting portion 4 welded together, the inner hole 2 is located in the front end thermal expansion portion 3, the front end thermal expansion portion 3 is made of 53Cr21Mn9Ni4N, and the rear end connecting portion 4 is made of 20CrMnTi or 42 CrMo. The 20CrMnTi or 42CrMo welding is characterized in that the hardness of an interface part 53cr21mn9ni4n in contact with a machine tool is HRC36-40 ℃, the hardness is insufficient, scratch and abrasion resistance are easily caused, the hardness of the 20CrMnTi after heat treatment can reach HRC55-58 ℃, the hardness of the 42CrMo after heat treatment can reach HRC46-50 ℃, the abrasion resistance can be improved after the hardness is improved, the precision and the anti-seismic performance of the product can be effectively kept for a long time, and therefore, two materials are selected for welding to meet the integral use requirement of the product
Preferably, the tool holder body 1 is a split type tool holder, as shown in fig. 2, and includes a thermal expansion rod 5 at the front end and a metal connection handle 6 at the rear end, the rear end of the thermal expansion rod 5 is detachably connected in the metal connection handle 6, the thermal expansion rod 5 is made of 53Cr21Mn9Ni4N, wherein the rear end of the thermal expansion rod 5 is connected in the metal connection handle 6 through a threaded structure.
In addition, the invention provides a manufacturing method of the anti-carbon-deposition anti-cracking thermal expansion knife handle, which is realized by the following steps:
firstly, cutting a raw material to a required length by a sawing machine;
roughly turning the outer surface of the numerical control lathe;
drilling by a numerical control milling machine;
fourthly, the hardness of the heat treatment product is HRC36-40 degrees, and the residual stress of the heat treatment product is removed to ensure that the finished product is not deformed when being heated and applied;
finish turning the product surface to a standard size by a precision numerical control lathe;
sixthly, performing precise numerical control external grinding, wherein the external circle is coarsely ground, then the product is finely ground to a standard size, and the taper and roundness verticality of the product are controlled within 0.003 by a universal precise detection instrument;
seventhly, grinding the inner hole to the required standard size by using a precise CNC (computer numerical control) internal grinding machine, and detecting the tolerance, roundness and verticality of the inner hole by using a general precise detection instrument to reach the standard;
eighthly, cleaning the knife handle, cleaning and tidying, cleaning the finished product, and then sorting and packaging to obtain a qualified product.
According to the invention, through long-time tests, the material of the thermal expansion tool shank is selected from 53Cr21Mn9Ni4N, so that no carbon deposition or micro carbon deposition can be realized, thermal expansion is realized for 2000 times without cracking, and compared with the existing thermal expansion tool shank, the thermal expansion tool shank has the advantages that multiple performances are greatly improved, in addition, the thermal expansion tool shank can be in a slender structure, a milling cutter can be clamped to the shortest length, the strong stable cutting capability and high rigidity of the cutter are ensured, and the service life of the cutter is obviously prolonged.
After the finished product is manufactured, a large amount of manpower and material resources are input to test the product performance and the service life of a plurality of specification products on a computer for a period of several years, the heating is accumulated for more than 10 ten thousand times, the thermal fatigue temperature of the product is not deformed within 750 ℃, and a single specification product is heated for more than 2000 times in an accumulated way, does not crack or deform, can resist high-temperature carbon deposition and rust, and achieves the product really required by the market.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change or modification made to the above embodiments according to the technical principle of the present invention still falls within the scope of the technical solution of the present invention.

Claims (5)

1. The utility model provides an anti carbon deposit prevents fracture heat expansion handle of a knife, includes handle of a knife body (1), be provided with hole (2) that are used for installing the cutter in handle of a knife body (1), its characterized in that: the material of the cutter handle body (1) on the outer side of the inner hole (2) is 53Cr21Mn9Ni 4N.
2. The carbon deposition resistant and cracking resistant thermal expansion knife handle according to claim 1, characterized in that: handle of a knife body (1) formula handle of a knife as an organic whole, including front end thermal expansion portion (3) and rear end connecting portion (4) that welds each other together, hole (2) are located front end thermal expansion portion (3), the material of front end thermal expansion portion (3) is 53Cr21Mn9Ni4N, the material of rear end connecting portion (4) is 20CrMnTi or 42 CrMo.
3. The carbon deposition resistant and cracking resistant thermal expansion knife handle according to claim 1, characterized in that: the utility model discloses a handle of a knife, including the hot expanding bar (5) of front end and metal connection handle (6) of rear end, hot expanding bar (5) rear end can be dismantled and connect in metal connection handle (6), the material of hot expanding bar (5) is 53Cr21Mn9Ni 4N.
4. The carbon deposition resistant and cracking resistant thermal expansion knife handle according to claim 3, characterized in that: the rear end of the hot expansion rod (5) is connected in the metal connecting handle (6) through a thread structure.
5. The manufacturing method of the anti-carbon-deposition anti-cracking thermal expansion knife handle is characterized by comprising the following steps of: the method is realized by the following steps:
firstly, cutting a raw material to a required length by a sawing machine;
roughly turning the outer surface of the numerical control lathe;
drilling by a numerical control milling machine;
fourthly, the hardness of the heat treatment product is HRC36-40 degrees, and the residual stress of the heat treatment product is removed to ensure that the finished product is not deformed when being heated and applied;
finish turning the product surface to a standard size by a precision numerical control lathe;
sixthly, performing precise numerical control external grinding, wherein the external circle is coarsely ground, then the product is finely ground to a standard size, and the taper and roundness verticality of the product are controlled within 0.003 by a universal precise detection instrument;
seventhly, grinding the inner hole to the required standard size by using a precise CNC (computer numerical control) internal grinding machine, and detecting the tolerance, roundness and verticality of the inner hole by using a general precise detection instrument to reach the standard;
eighthly, cleaning the knife handle, cleaning and tidying, cleaning the finished product, and then sorting and packaging to obtain a qualified product.
CN202011285417.9A 2020-11-17 2020-11-17 Carbon deposition-resistant and cracking-resistant thermal expansion knife handle and manufacturing method thereof Pending CN112676630A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011285417.9A CN112676630A (en) 2020-11-17 2020-11-17 Carbon deposition-resistant and cracking-resistant thermal expansion knife handle and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011285417.9A CN112676630A (en) 2020-11-17 2020-11-17 Carbon deposition-resistant and cracking-resistant thermal expansion knife handle and manufacturing method thereof

Publications (1)

Publication Number Publication Date
CN112676630A true CN112676630A (en) 2021-04-20

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CN110091127A (en) * 2019-04-25 2019-08-06 上海航天精密机械研究所 A kind of thin-wall long and thin pipe fitting entirety precision machining method
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