CN102814532B - Method of V-shaped welding of solid carbide drill and solid carbide drill thereof - Google Patents
Method of V-shaped welding of solid carbide drill and solid carbide drill thereof Download PDFInfo
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- CN102814532B CN102814532B CN201210272023.9A CN201210272023A CN102814532B CN 102814532 B CN102814532 B CN 102814532B CN 201210272023 A CN201210272023 A CN 201210272023A CN 102814532 B CN102814532 B CN 102814532B
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Abstract
The invention discloses a method of V-shaped welding of a solid carbide drill and the solid carbide drill of the method. The V-shaped welding method comprises the following steps of: selecting corresponding hard alloy bar stocks; determining the lengths of a drill blade part and a drill handle part; carrying out centreless grinding to alloy bar stocks of the drill blade part; cutting the drill blade parts and V-shaped welding parts on the alloy bar stocks by a wire cutting machine; milling a stress relief groove; carrying out heat treatment to the drill handle part, wherein the hardness is 50HRC (rockwell hardness C); carrying out pre-heating to the drill blade part; clamping the drill handle part at the bottom of a special welding fixture by the special welding fixture, and carrying out high-frequency heating; and carrying out heat preservation to the welded solid carbide drill. The structure of the solid carbide drill is as follows: a V-shaped welding part, which is a V-shaped groove, is arranged at the drill handle part, the V-shaped angle is 120 degrees, and the top of the V-shaped angle is the stress relief groove. The method of the V-shaped welding of the solid carbide drill has the following advantages that: the material cost of cutting tools is reduced, and the integral performance is improved. The solid carbide drill is widely applied, so that a large quantity of resources can be saved, and great economic and social benefits can be obtained.
Description
Technical field
What the present invention relates to is a kind of method and solid carbide drill thereof of V-type welding integral carbide drill.
Background technology
The domestic and international current way of Digit Control Machine Tool grooved bit is to adopt whole hard alloy bar to be made at present, because carbide alloy is all used as coupling part and handle of a knife in other positions of not playing shear action, material cost is high, and cutter is expensive, serious waste resource.External also have adopt U to bore or crown drill bit, this two drill bit is cost-saved, can produce and arrive D12 diameter drill bit.
Summary of the invention
What the present invention proposed is a kind of method and solid carbide drill thereof of V-type welding integral carbide drill, its objective is the overall performance that improves cutter, reduces the material cost of cutter, broaden application scope.
Technical solution of the present invention: solid carbide drill, its structure comprises drill bit blade, drill handle part, wherein on drill handle part, establish " V " type welding position, described place, " V " type welding position is " V " type groove, the angle of being somebody's turn to do " V " type angle of " V " type groove is 120 °, and the top at " V " type angle is stress relief grooves.
The method of V-type welding integral carbide drill, comprises following processing step:
One, select corresponding carbide alloy bar K40, cutter hub material 9Crsi;
Two, by technological requirement, determine that the length of drill bit blade 1 is 100mm-103mm, the length 65mm-70mm of drill handle part 3;
Three, the alloy bar bar of centreless mill crusher drill blade, to D16.5mm;
Four, with wire cutting machine cutting bit blade and " V " type welding position on alloy bar bar; Should " V " type welding position be " V " type groove, " V " type angle of being somebody's turn to do " V " type groove be 120 °; With special fixture, guarantee " V " type weld part bit position and alloy bar material centres, bias≤0.05mm;
Five, on drill handle part, mill out one and the equal-sized stress relief grooves of " V " type groove, this stress relief grooves is at the top at " V " type angle, flute length 13.5mm, the groove width 5mm of stress relief grooves, groove depth 5mm;
Six, drill handle part heat treatment, hardness 50HRC;
Seven, drill bit blade pre-heating, uses special-purpose thermal insulation case, and 300 ° of C of the temperature inside the box are incubated 4～6 hours;
Eight, with welding special fixture, drill handle part is clamped in to the bottom of this fixture, high-frequency heating 700 degree, 5 seconds time, borax is sprinkled upon on " V " type welding position, notes not being spread across in stress relief grooves, otherwise can discharge stress effect by weak its of Shirts, after thawing, drill bit blade
fromin the guide pin bushing of fixture upper end, put down, " V " type groove and stress relief grooves align, the 900-1000 degree of heating, 10 seconds of warm-up time, special purpose copper scolder is dissolved on " V " type welding position, unclamps floor push and stop high-frequency heating, waited for for 10 seconds the cutter welding is taken out from fixture! Put incubator into;
Nine, incubator is preheating to 300 ° of C, and the solid carbide drill welding is entered to incubator, keeps 300 ° of C, constant temperature 4～6 hours, and automatic cut-off power then, until solid carbide drill is cooling.
Advantage of the present invention: adopt this technology, for processing, easily cut material and common intensity steel, can greatly reduce the material cost of cutter, finally reduced to a great extent cutter price, the cutter being made by the method, price is at least fallen more than 1/3 compared with whole hard alloy, and property retention is unaffected.At home in machining industry, especially in digital control processing, due to primary high-speed cutting, solid carbide drill is widely used, and the high-speed steel drill market share is more and more less, of the present invention applying, ample resources be will save, very large economic benefit and social benefit brought.
Accompanying drawing explanation
Accompanying drawing 2 is enlarged drawings of the stress relief grooves that mills out of V-type bottom.
In figure 1 is drill bit blade, the 2nd, " V " type welding position, the 3rd, drill handle part, the 4th, " V " type angle, the 5th, stress relief grooves.
The specific embodiment
Embodiment
The method of V-type welding D16X165 welded type solid carbide drill, comprises following processing step:
One, select the corresponding blue trifoliate orange of carbide alloy bar K40(Germany), cutter hub material 9Crsi;
Two, by technological requirement, determine drill bit blade 1 length 100mm-103mm, the length 65mm-70mm of drill handle part 3;
Three, the alloy bar bar of centreless mill crusher drill blade 1, to D16.5mm;
Four, the stress relief grooves 5 on illing-drilling head shank 3, flute length 13.5mm, groove width 5mm, groove depth 5mm;
Five, with wire cutting machine cutting bit blade 1 and " V " type welding position 2 on alloy bar bar;
And with welding special fixture, guarantee position and the alloy bar material centres of " V " type welding position 2, and bias≤0.05mm, the angle at " V " type angle 4 at 2 places, " V " type welding position is 120 °;
Six, drill handle part 3 heat treatments, hardness 50HRC;
Seven, drill bit blade 1 pre-heating, uses special-purpose thermal insulation case, and 300 ° of C are incubated 4～6 hours;
Eight, with special fixture, drill handle part 3 is clamped in to fixture bottom, high-frequency heating 700 degree, 5 seconds time, borax is sprinkled upon on V-type face, note not being spread across in stress relief grooves, otherwise can discharge stress effect by weak its of Shirts, after thawing, drill bit blade 1 puts down in the guide pin bushing of fixture upper end, 3 liang of " V " type grooves of Integral alloy bar 1 and cutter hub are aligned, the 900-1000 degree of heating, in 10 seconds of warm-up time, makes special purpose copper scolder dissolve into " V " type welding position 2, unclamp floor push and stop high-frequency heating, waited for for 10 seconds the cutter welding is taken out from fixture! Put incubator into; Cooling; Whole process is accomplished without any letup, and paying special attention to welding temperature can not be too high, otherwise can produce " burning " phenomenon, and drill bit blade fragility strengthens, and forms fracture;
Nine, incubator is preheating to 300 ° of C, and the solid carbide drill welding is entered to incubator, keeps 300 ° of C, constant temperature 4～6 hours, and automatic cut-off power then, until solid carbide drill is cooling.
During the cutting of " V " type connection part separated time, guarantee symmetry, " V " Xing Di center and bar center are consistent substantially, and deviation can not be large.
" V " type groove at set 2 places, " V " type welding position on drill handle part 3, mills out the groove of a corresponding size, and this groove is called as stress relief grooves.This is to eliminate to weld to heat and different materials coefficient of thermal expansion generation stress, prevents the key technology of cracking.
The effect that reduces stress, prevents cracking is played in preheating of carbide alloy bar equally.
Welding special fixture, guarantees that drill bit blade 1, drill handle part 3 linearitys are good.
After welding, the temperature of insulation and temperature retention time play a part to eliminate welding residual stress equally, effectively prevent cutter cracking.
The rapidoprint scope that the present invention is applicable: aluminium alloy, cast iron, magnesium iron, common intensity steel.
Applicable tool specification: Φ 10～Φ 25.
Claims (1)
1. solid carbide drill, it is characterized in that structure comprises drill bit blade, drill handle part, wherein on drill handle part, establish " V " type welding position, described place, " V " type welding position is " V " type groove, the angle of being somebody's turn to do " V " type angle of " V " type groove is 120 °, and the top at " V " type angle is stress relief grooves; Its welding method, comprises following processing step:
One, select corresponding carbide alloy bar K40, cutter hub material 9Crsi;
Two, by technological requirement, determine that the length of drill bit blade is 100mm-103mm, the length 65mm-70mm of drill handle part 3;
Three, the alloy bar bar of centreless mill crusher drill blade, to D16.5mm;
Four, with wire cutting machine cutting bit blade and " V " type welding position on alloy bar bar; Should " V " type welding position be " V " type groove, " V " type angle of being somebody's turn to do " V " type groove be 120 °; With special fixture, guarantee " V " type weld part bit position and alloy bar material centres, bias≤0.05mm;
Five, on drill handle part, mill out one and the equal-sized stress relief grooves of " V " type groove, this stress relief grooves is at the top at " V " type angle, flute length 13.5mm, the groove width 5mm of stress relief grooves, groove depth 5mm;
Six, drill handle part heat treatment, hardness 50HRC;
Seven, drill bit blade pre-heating, uses special-purpose thermal insulation case, and 300 ° of C of the temperature inside the box are incubated 4～6 hours;
Eight, with welding special fixture, drill handle part is clamped in to the bottom of this fixture, high-frequency heating 700 degree, 5 seconds time, borax is sprinkled upon on " V " type welding position, notes not being spread across in stress relief grooves, otherwise can discharge stress effect by weak its of Shirts, after thawing, drill bit blade
fromin the guide pin bushing of fixture upper end, put down, " V " type groove and stress relief grooves align, the 900-1000 degree of heating, 10 seconds of warm-up time, special purpose copper scolder is dissolved on " V " type welding position, unclamp floor push and stop high-frequency heating, after 10 seconds, from fixture, take out, then put the drill bit welding into incubator;
Nine, incubator is preheating to 300 ° of C, and the solid carbide drill welding is entered to incubator, keeps 300 ° of C, constant temperature 4～6 hours, and automatic cut-off power then, until solid carbide drill is cooling;
When described " V " type weld part bit line cuts, guarantee symmetry, " V " Xing Di center and bar center are consistent; Described welding special fixture should guarantee that drill bit blade, drill handle part linearity are good.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210272023.9A CN102814532B (en) | 2012-08-02 | 2012-08-02 | Method of V-shaped welding of solid carbide drill and solid carbide drill thereof |
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| CN201210272023.9A CN102814532B (en) | 2012-08-02 | 2012-08-02 | Method of V-shaped welding of solid carbide drill and solid carbide drill thereof |
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| CN102814532B true CN102814532B (en) | 2014-04-16 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103990907A (en) * | 2014-04-14 | 2014-08-20 | 河源普益硬质合金厂有限公司 | High-temperature vacuum hard alloy welding method |
| US20160016258A1 (en) * | 2014-07-17 | 2016-01-21 | GM Global Technology Operations LLC | Weld for differential assembly |
| CN105599074B (en) * | 2015-12-21 | 2017-12-15 | 浙江浪潮精密机械有限公司 | A kind of carbide drill and its processing technology |
| CN106271490A (en) * | 2016-08-27 | 2017-01-04 | 杭州比诺精密工具有限公司 | The preparation method of rustless steel whole hard alloy tricuspid step drill cutter |
| CN108213474A (en) * | 2017-12-11 | 2018-06-29 | 深圳市鑫运祥精密刀具有限公司 | A kind of carbide bit and welding method |
| CN113631307B (en) * | 2019-03-26 | 2024-04-26 | 三菱综合材料株式会社 | Base material for hard sintered body, and cutting tool |
| CN111515800B (en) * | 2020-04-28 | 2021-07-27 | 厦门厦芝科技工具有限公司 | V-arrangement welded structure processing and counterpoint verifying attachment of drill bit |
| CN112705742A (en) * | 2020-12-22 | 2021-04-27 | 卡孚精密科技(嘉兴)有限公司 | Alloy cutter and machining process thereof |
| CN115026524A (en) * | 2022-07-08 | 2022-09-09 | 泰州虹康电子科技有限公司 | Production process of high-strength drill bit |
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| CN2650927Y (en) * | 2003-09-30 | 2004-10-27 | 东风康明斯发动机有限公司 | Welded hard-alloy parabolic bit |
| CN201164910Y (en) * | 2007-05-31 | 2008-12-17 | 张文锦 | Medium and small sized sintered carbide tool |
| KR20110128694A (en) * | 2010-05-24 | 2011-11-30 | 태양파워(주) | Drill bit |
| CN102266969A (en) * | 2011-07-28 | 2011-12-07 | 锑玛(苏州)精密工具有限公司 | Drill head |
| CN202684162U (en) * | 2012-08-02 | 2013-01-23 | 泰兴市信达克刀具有限公司 | Integral cemented carbide drill utilizing V-shaped welding |
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Owner name: NANJING XINDAKE TOOL TECHNOLOGY DEVELOPMENT CO., L Free format text: FORMER OWNER: TAIXING X DAKE CUTTING TOOL CO., LTD. Effective date: 20140902 |
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Effective date of registration: 20140902 Address after: Jiangning District of Nanjing City, Jiangsu province 211111 streets moling Road No. 12 mo Zhou Patentee after: Nanjing Xindake Tool Technology Development Co., Ltd. Address before: 225441, No. 7 East Road, Dasheng Town, Taizhou City, Jiangsu, Taixing Patentee before: Taizhou X-Dake Cutting Tool Co., Ltd. |
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Effective date of registration: 20190423 Address after: 225441 Huasheng Road, Dasheng Village, Jichuan Street, Taixing City, Jiangsu Province Patentee after: Jiangsu XinDa Tools Technology Co., Ltd. Address before: 211111 No. 12, Mazhou East Road, Mau Ling Street, Jiangning District, Nanjing, Jiangsu Patentee before: Nanjing Xindake Tool Technology Development Co., Ltd. |