CN1236888C - Method for jointing alloy structure part and stainless steel structural part and method for mfg. cutting tool - Google Patents
Method for jointing alloy structure part and stainless steel structural part and method for mfg. cutting tool Download PDFInfo
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- CN1236888C CN1236888C CN 02119986 CN02119986A CN1236888C CN 1236888 C CN1236888 C CN 1236888C CN 02119986 CN02119986 CN 02119986 CN 02119986 A CN02119986 A CN 02119986A CN 1236888 C CN1236888 C CN 1236888C
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Abstract
The present invention provides practical and excellent technology for bonding superhard alloy members and stainless steel members taking wolfram carbide as a main component by sufficient bond strength, which has low cost and high practicality. The superhard alloy member 1 and the stainless steel member 2 of the present invention taking wolfram carbide as a main component has the connecting method which is characterized in that the superhard alloy member 1 and the stainless steel member 2 are respectively connected with electrodes 3, 4. Under the mutually pressing state of the superhard alloy member 1 and the stainless steel member 2, a pulsed current flows to the superhard alloy member 1 and the stainless steel member 2 from the electrodes 3, 4. Then, the superhard alloy member 1 is combined with the stainless steel member 2 by welding.
Description
Technical field
The present invention relates to the joint method of superhard alloy member and stainless steel component and use superhard alloy to make the method for cutting element.
Background technology
With the tungsten carbide is principal component, and the superhard alloy that mixes with cobalt, tantalum, chromium etc. has very high hardness, usually as the raw material of the drill bit of hard materials such as high accuracy processing metallic and printed circuit board (PCB) etc.
This cemented carbide drill bit has following structure.
Example 1 (monolithic devices) in the past
One end of superhard alloy bar is processed into blade, and the other end is processed into the sword handle.
In the past in the example 1, because blade and sword handle are made of one, and integral body all is to make with expensive superhard alloy, so there is the high shortcoming of cost.In addition, under the blade situation littler, also exist this blade diameter to be difficult to the shortcoming of processing and remove the wasting shortcoming of superhard alloy because of processing than sword shank diameter.
Example 2 (mosaic type) in the past
As shown in Figure 1, offer recess 23 (hole portion) on the bar 22 of stainless steel, shrunk fit inserts the bar 21 of cemented carbide in this recess 23, forms blade in the superhard alloy side then, forms the sword shank in the stainless steel side.
Example 2 can reduce than example 1 cost in the past in the past, but to part that is inserted into recess 23 and the stainless steel that inserts for cemented carbide bar 21, all must carry out the hole processing of very high degree of precision, and the bar 21 of cemented carbide must stay the length of inserting recess 23 parts, consequently cost up more.
Summary of the invention
The present invention is the invention of In view of the foregoing finishing, and it is a kind of low cost method, provides an energy to engage with the tungsten carbide technology of the practicality excellence that is the superhard alloy member of principal component and stainless steel component with bond strength enough in the practicality.
The present invention 1 is the joint method of superhard alloy member and stainless steel component, described method is to be the superhard alloy member of principal component and the joint method of stainless steel component with the tungsten carbide, the feature of this method is, superhard alloy member and stainless steel component are connected on the electrode, under the state that above-mentioned superhard alloy member and stainless steel component compress mutually, allow pulse current from above-mentioned electrode stream to above-mentioned superhard alloy member and stainless steel component, make both weld and engage then.
The present invention 2 further limits the joint method of aforementioned 1 described superhard alloy member and stainless steel component, wherein, near the composition surface of superhard alloy member and the composition surface of stainless steel component nearby is processed into bar-shaped respectively, tabular surface is processed on the composition surface of above-mentioned superhard alloy member side, the composition surface of stainless steel component side be processed into have more than 150 °, the convex of drift angle below 180 ° is coniform.
The present invention 3 further limits the joint methods of aforementioned 2 described superhard alloy members and stainless steel component, wherein, is equivalent to the equal diameters on composition surface of the diameter of section of the coniform bottom surface of convex of stainless steel component and superhard alloy member side or smaller.
The joint method of any one described superhard alloy member and stainless steel component in the present invention's 4 further qualifications aforementioned 1～3, wherein, pulse current is set at the energy that per 1 subpulse is emitted 100～200Ws in the burst length of 4ms.
The joint method of any one described superhard alloy member and stainless steel component in the present invention's 5 further qualifications aforementioned 1～4, wherein, the extruding force that superhard alloy member and stainless steel component compress mutually is set in the scope of 49～120N.
The present invention 6 makes the method for cutting element for using superhard alloy, the feature of this method is, in by aforementioned 1～5, process blade on any one described superhard alloy member and the superhard alloy member that the joint method of stainless steel component engages, on stainless steel component, process the sword handle, make cutting element.
The present invention 7 further limits the method that aforementioned 6 described use superhard alloys are made cutting element, and this method is used to make printed circuit board (PCB) processing cutting element.
If allowing under the state that superhard alloy member and stainless steel component compress mutually among pulse current flows to both from electrode, then the composition surface of superhard alloy member nearby and near the composition surface of stainless steel component fusion can occur, both mix and diffusion bond, and superhard alloy member and stainless steel component just engage by this mixing portion like this.
Because the energy of pulse current is easy to control, and can emit high-energy at short notice, so be specially adapted near near the fusion in composition surface that reaches stainless steel component in the composition surface of superhard alloy member, and can improve the bond strength of superhard alloy member and stainless steel component.
As mentioned above, the present invention be an energy with bond strength enough in the practicality and lower cost, engage with the tungsten carbide technology of the practicality excellence that is the superhard alloy member of principal component and stainless steel component.
Description of drawings
Fig. 1 is the key diagram of example 2 in the past.
Fig. 2 is the key diagram of the embodiment of the invention.
Fig. 3 is the key diagram of the embodiment of the invention.
Among the figure, 1 expression superhard alloy parts, 2 expression parts of stainless steel, 3 and 4 expression electrodes.
The specific embodiment
Fig. 2 and 3 is schematic diagrames of one embodiment of the invention, is illustrated below with reference to Fig. 2 and 3 couples of embodiment.
Present embodiment is an example of making the printed circuit board (PCB) drill bit for machining.The superhard alloy member 1 and the stainless steel component 2 that will be principal component with the tungsten carbide are connected to electrode 3,4, under the state that superhard alloy member 1 and stainless steel component 2 compress mutually, make pulse current flow to this superhard alloy member 1 and stainless steel component 2, both are engaged by welding from electrode 3,4.Then, on superhard alloy member 1, process blade, on stainless steel component 2, process the sword shank.
What 1 employing of superhard alloy member was commercially available is the cemented carbide pole shape bar of principal component with the tungsten carbide, and an end face of this bar is set at the composition surface.
Stainless steel component 2 adopts SUS440C, SUS420F, SUS420J2, the bar-shaped bar of martensitic stainless steel rounding of SUS410 etc.And, the front end of this stainless steel component 2 is processed into taper portion 5, and the front end face of this taper portion 5 is set at the composition surface.
The composition surface of superhard alloy member 1 side is processed as tabular surface, the composition surface of stainless steel component 2 sides be processed as have more than 150 °, the convex of drift angle below 180 ° is coniform.Can confirm by experiment, this structure is under the situation that pulse current passes through, because the diameter of the coniform part of convex of stainless steel component 2 is little, the electric current that unit are is passed through fusion greatly and easily is so the bond strength of superhard alloy member 1 and stainless steel component 2 increases.In addition, can confirm also by experiment that it is optimal that the composition surface of stainless steel component 2 sides is processed into the convex with 170 ° of drift angles coniform.
In addition, the diameter of section that will be equivalent to the coniform bottom surface of convex of stainless steel component 2 is set for and the equal diameters on the composition surface of superhard alloy member 1 side or smaller.Can confirm that by experiment this structure can improve the bond strength of superhard alloy member 1 and stainless steel component 2.This is because under the situation that pulse current passes through, the coniform part of the convex of above-mentioned stainless steel component 2 and nearby fusion can take place, this fused mass covers near the composition surface of superhard alloy member 1, if but this fused mass large tracts of land covers the composition surface side of superhard alloy member 1, then the heat of this fused mass can make the composition of superhard alloy 1 change, and consequently causes intensity to descend.
Also can confirm by experiment, the composition surface of stainless steel component 2 is not under the situation on the coniform but plane of convex, based on reason same as described above, the composition surface diameter of stainless steel component 2 sides than the composition surface diameter of superhard alloy member 1 side more hour bond strength can increase.
In addition, pulse current is set in the burst length of 4ms per 1 subpulse and can emits 100 and even the energy of 200Ws.These data are also confirmed by experiment.If the energy that discharges is below 100Ws, then the fusion of superhard alloy member 1 and stainless steel component 2 is insufficient, causes bond strength to descend.If the energy that discharges surpasses 200Ws, when particularly the fusion of stainless steel component 2 is excessive because with above-mentioned same reason, the fused mass large tracts of land covers the composition surface side of superhard alloy member 1, and bond strength is descended.
In addition, the extruding force that superhard alloy member 1 and stainless steel component 2 are compressed mutually is set in 49～120N (in 5～12.2kgf) the scope.This numerical value is also confirmed by experiment.If extruding force is less than 49N, then the undercompounding of the stainless steel component 2 of the superhard alloy member 1 of fusion and fusion causes bond strength to descend.If extruding force surpasses 120N, the coniform part of the convex of stainless steel component 2 and nearby fusion is excessive then because with above-mentioned same reason, bond strength also can descend.
Concrete experimental result below is described in detail in detail.
Superhard alloy member 1 uses the pole material of diameter 1.42mm.
The drift angle of the coniform part of convex of stainless steel component 2 is 170 °, and the diameter that is equivalent to the section of the coniform part of this convex bottom surface is 1.20mm.
Burst length is set at 4ms, and power output is the energy that per 1 subpulse discharges 120Ws.
Extruding force is set at 98N (10kgf).
After superhard alloy member 1 and stainless steel component 2 engaged, superhard alloy member 1 part was processed to the member of diameter 1mm by machining.
From the junction of superhard alloy member 1 and stainless steel component 2, in the additional loading in the position of distance superhard alloy member 1 side 5mm, the additional loading when breakage is taken place in above-mentioned junction is set at bond strength.
Can confirm that by this experiment minimum bond strength is 26.5N (2.7kgf).Because the loading of breaking when superhard alloy member 1 part is made the drill bit of φ 0.25 is 0.49N (0.05kgf), so it is generally acknowledged above-mentioned minimum bond strength when reality is used enough (in addition, also have in the commercially available drill bit when superhard alloy member 1 part is made the drill bit of φ 0.25, the diameter of this superhard alloy member 1 is designed to the situation more than the 1mm in the junction of superhard alloy member 1 and stainless steel component 2).
As mentioned above, can to make with the tungsten carbide with low-cost and high bond strength be that the superhard alloy member 1 and the stainless steel component 2 of principal component engages to present embodiment.
Therefore, can obtain all good processing printed circuit board drill bit aspect intensity, durability, precision.
Because needn't be, the length of superhard alloy member 1 be increased by one insert the required length of recess part, so can reduce cost as example 2 in the past.
Also needn't on stainless steel component 2, offer high-precision recess, just say on this point, also can reduce cost as example 2 in the past.
In addition, even sword shank diameter is bigger than blade, superhard alloy member 1 also can use the minor diameter member near the blade diameter, therefore can reduce the waste of superhard alloy member 1, just says on this point, also can reduce cost.
In addition, as described in open the flat 6-199580 of communique number of Japan Patent, be set at hypoxemia atmosphere gas (argon atmosphere gas or nitrogen atmosphere gas), can further improve bond strength by engaging atmosphere gas.But when adopting the processing printed circuit board of method of the present invention, even if the bond strength that above-mentioned experiment obtains is also enough with the such path drill bit of drill bit.Therefore, can think and engage and in atmosphere, to finish after adopting method of the present invention.
Claims (6)
1. the joint method of superhard alloy member and stainless steel component, described method is to be the superhard alloy member of principal component and the joint method of stainless steel component with the tungsten carbide, it is characterized in that, superhard alloy member and stainless steel component are connected on the electrode, under the state that above-mentioned superhard alloy member and stainless steel component compress mutually, allow pulse current from above-mentioned electrode stream to above-mentioned superhard alloy member and stainless steel component, by welding both are engaged then, and, the composition surface that the composition surface of superhard alloy member nearby reaches stainless steel component nearby is processed to bar-shaped respectively, the composition surface of above-mentioned superhard alloy member side is processed to tabular surface, and the composition surface of stainless steel component side is processed to have more than 150 °, the convex of drift angle is coniform below 180 °.
2. the joint method of superhard alloy member as claimed in claim 1 and stainless steel component, its feature also be, is equivalent to the equal diameters on composition surface of the diameter of section of the coniform bottom surface of convex of stainless steel component and superhard alloy member side or smaller.
3. the joint method of superhard alloy member as claimed in claim 1 and stainless steel component, its feature are that also pulse current is set at the energy of per 1 subpulse release, 100～200Ws in the burst length of 4ms.
4. the joint method of superhard alloy member as claimed in claim 1 and stainless steel component, its feature are that also the extruding force that superhard alloy member and stainless steel component compress mutually is set in the scope of 49～120N.
5. use superhard alloy to make the method for cutting element, it is characterized in that, processing blade on described superhard alloy member and the superhard alloy member that the joint method of stainless steel component engages by claim 1, on stainless steel component, process the sword handle, make cutting element.
6. use superhard alloy as claimed in claim 5 is made the method for cutting element, and its feature also is, makes printed circuit board (PCB) processing cutting element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02119986 CN1236888C (en) | 2002-05-17 | 2002-05-17 | Method for jointing alloy structure part and stainless steel structural part and method for mfg. cutting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02119986 CN1236888C (en) | 2002-05-17 | 2002-05-17 | Method for jointing alloy structure part and stainless steel structural part and method for mfg. cutting tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1459350A CN1459350A (en) | 2003-12-03 |
| CN1236888C true CN1236888C (en) | 2006-01-18 |
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| CN 02119986 Expired - Fee Related CN1236888C (en) | 2002-05-17 | 2002-05-17 | Method for jointing alloy structure part and stainless steel structural part and method for mfg. cutting tool |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5345487B2 (en) * | 2008-09-24 | 2013-11-20 | 日本碍子株式会社 | Bonded body and die for forming honeycomb structure |
| JP2010120144A (en) * | 2008-11-21 | 2010-06-03 | Union Tool Co | Drilling tool and method for manufacturing the same |
| CN102728918B (en) * | 2012-06-13 | 2014-06-25 | 陕西渭河煤化工集团有限责任公司 | Method for connecting WC (Wolfram Carbide) valve core with stainless steel valve rod through thermal bonding |
| TWI740287B (en) * | 2019-11-27 | 2021-09-21 | 復盛應用科技股份有限公司 | Method for manufacturing a golf club head |
| CN112077424A (en) * | 2020-09-09 | 2020-12-15 | 深圳市金洲精工科技股份有限公司 | Welding method of cutter |
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- 2002-05-17 CN CN 02119986 patent/CN1236888C/en not_active Expired - Fee Related
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| CN1459350A (en) | 2003-12-03 |
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