CN203649595U - Brazed connection structure between punching head of sintered-carbide die and steel base - Google Patents
Brazed connection structure between punching head of sintered-carbide die and steel base Download PDFInfo
- Publication number
- CN203649595U CN203649595U CN201320852280.XU CN201320852280U CN203649595U CN 203649595 U CN203649595 U CN 203649595U CN 201320852280 U CN201320852280 U CN 201320852280U CN 203649595 U CN203649595 U CN 203649595U
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- China
- Prior art keywords
- sintered
- brazing
- small
- carbide die
- steel base
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- Expired - Lifetime
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 33
- 239000010959 steel Substances 0.000 title claims abstract description 33
- 238000004080 punching Methods 0.000 title abstract 3
- 238000005219 brazing Methods 0.000 claims abstract description 22
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 27
- 238000005476 soldering Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 abstract description 12
- 239000000956 alloy Substances 0.000 abstract description 9
- 238000003466 welding Methods 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 229910003460 diamond Inorganic materials 0.000 abstract 2
- 239000010432 diamond Substances 0.000 abstract 2
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 8
- 229910000679 solder Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model relates to a brazed connection structure between a punching head of a sintered-carbide die and a steel base. The structure comprises that the big diamond brazing surface of the steel base is divided into mutually spaced small blocks with size of 3mm*3mm, the channels between the small blocks are preferably 3mm wide and 2mm deep; when the punching head of the sintered-carbide die is brazed on the steel base, the heating temperature of a work-piece is less than 650 DEG C; a high frequently heated area is controlled, and the work-piece is slowly cooled to reduce the inner stress of the brazing surface after the brazing. The structure has the beneficial effects that rolled steel and a hard alloy material are very small in strain difference in an area due to the small sizes of the small blocks in the process of brazing; furthermore, a welding and cooling process is very balanced, the small blocks are inwards cooled from the edge of each small block, and the synchronous cooling can be essentially realized due to the small areas of the small blocks. Therefore, the stress of the whole welding surface can not be overlapped, and the inner welding stress can be reduced to be less than 10% of the big diamond brazing surface; in addition, the work-piece scrap caused by cracked work-pieces can not be caused in the subsequent processing procedure.
Description
Technical field
The utility model relates to the mould syndeton that a kind of Powder Metallurgy Industry is used, particularly the structure of a kind of sintered-carbide die staking punch and steel pedestal brazing.
Background technology
Carbide alloy belongs to difficult processing, high-value product, and in Powder Metallurgy Industry, mould parts working portion must just can meet the demands with carbide alloy.For saving material and processing cost, in industry, generally adopt steel to do pedestal, working portion adopts Hardmetal materials, and the material of two kinds of opposed polarities is by brazing together.Contact area large (as shown in Fig. 4-5) when the carbide alloy staking punch 4 of existing workpiece and 5 soldering of steel pedestal, under brazing temperature, steel pedestal and carbide alloy staking punch linear expansion coefficient cause being out of shape difference large more than differing twice.For example, when brazing temperature is 650 DEG C, be that 45mm × 45mm calculates by bonding area, the steel heat coefficient of expansion is α=12 × 10
- -6/ DEG C, and carbide alloy thermal coefficient of expansion is α=5.3 × 10
- -6/ DEG C; In brazing process, according to linear expansivity formula △ L=L × △ T × α, the deflection of solder side is as follows:
Steel pedestal deflection △ L
1=45mm × 650 DEG C × 12 × 10
- -6/ DEG C=0.351mm,
Carbide alloy deflection △ L
2=45mm × 650 DEG C × 5.3 × 10
- -6/ DEG C=0.155mm,
Relative deformation △ L=△ L
1-△ L
2=0.351-0.155=0.196mm;
Deflection is widely different, and cored solder to solidify be gradually to middle transition from workpiece contact-making surface outside; The contact of large faying face entirety, causes stress stack everywhere, finally shows as steel pedestal entirety and is subject to outside tension, and carbide alloy working portion is subject to the inside compression of entirety, and ess-strain direction as shown in Figure 5; Pricker bonding area is larger, and deflection difference and internal stress are also larger.Complete the initial stage in welding, various stress reaches macroscopical balance, and in following process process, can cause a large amount of stress release, occurs processing cracking.
So existing sintered-carbide die staking punch and the direct soldering connecting method of steel pedestal are mainly used in the workpiece of less solder side, be 20-50mm × 20-50mm and above large square for soldering area, very easily cause workpiece cracking to be scrapped.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of sintered-carbide die staking punch that larger soldering area, welding stress are less and structure of steel pedestal brazing of being applicable to.
The technical solution of the utility model is: the structure of a kind of sintered-carbide die staking punch and steel pedestal brazing, comprise the sintered-carbide die staking punch of soldering on large square steel pedestal, before soldering by steel pedestal, generous block brazing face be divided into apart from one another by fritter.
Described apart from one another by fritter be 2-4mm × 2-4mm, the ditch groove width between fritter is 2-4mm, dark 2mm.
Described apart from one another by fritter be preferably 3mm × 3mm, the ditch groove width between fritter is preferably 3mm, dark 2mm.
The beneficial effects of the utility model: by the generous block brazing face processing of steel pedestal be divided into apart from one another by fritter, when soldering, can there is a local stress balance in each fritter, as shown in fritter partial enlarged drawing 3; In fritter regional area, steel part is subject to outside tension equally, and carbide alloy is subject to inside compression, but small-sized due to fritter, and steel pedestal and sintered-carbide die staking punch are very little in this areal strain difference; In addition, very balance of welding cooling procedure, is all inwardly cooling by the edge of each fritter, and because fritter area is little, basic realization is synchronously cooling.So whole solder side stress there will not be stack, welding interior stress is decreased to below 10% of generous block brazing face; In following process process, can not cause workpiece to ftracture and scrap.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the fritter partial enlarged drawing that steel pedestal faying face is cut apart.
Fig. 4 is the structural representation of existing workpiece.
Fig. 5 is the top view of Fig. 4.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Embodiment is as Figure 1-3: the structure of a kind of sintered-carbide die staking punch and steel pedestal brazing, comprise the sintered-carbide die staking punch of soldering on steel pedestal, and concrete structure is:
1. before soldering, first the generous block brazing face of steel pedestal 2 is divided into apart from one another by 3mm × 3mm fritter 3, the ditch groove width between fritter 3 is 3mm, dark 2mm;
2. by 1 soldering of sintered-carbide die staking punch when the steel pedestal 2, whole workpiece heating-up temperature is less than 650 DEG C;
3. control the region of high-frequency heating, will be enclosed within the plane and the concordant placement of contact plane of steel pedestal 2 with sintered-carbide die staking punch 1 of the annular-heating circle mid-height outside workpiece;
4. after soldering completes, Slow cooling in workpiece normal temperature air, because the area of fritter 3 is little, steel pedestal 2 is synchronizeed cooling with the basic realization of sintered-carbide die staking punch 1.So whole solder side stress there will not be stack, in following process process, can not cause workpiece to ftracture and scrap.
Claims (3)
1. the structure of a sintered-carbide die staking punch and steel pedestal brazing, comprise the sintered-carbide die staking punch (1) of soldering on large square steel pedestal (2), it is characterized in that: before soldering, the generous block brazing face of steel pedestal (2) is divided into apart from one another by fritter (3).
2. the structure of a kind of sintered-carbide die staking punch and steel pedestal brazing according to claim 1, is characterized in that: described apart from one another by fritter (3) be 2-4mm × 2-4mm, the ditch groove width between fritter (3) is 2-4mm, dark 2mm.
3. the structure of a kind of sintered-carbide die staking punch and steel pedestal brazing according to claim 2, is characterized in that: described apart from one another by fritter (3) be preferably 3mm × 3mm, the ditch groove width between fritter (3) is preferably 3mm, dark 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320852280.XU CN203649595U (en) | 2013-12-23 | 2013-12-23 | Brazed connection structure between punching head of sintered-carbide die and steel base |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320852280.XU CN203649595U (en) | 2013-12-23 | 2013-12-23 | Brazed connection structure between punching head of sintered-carbide die and steel base |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203649595U true CN203649595U (en) | 2014-06-18 |
Family
ID=50916032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320852280.XU Expired - Lifetime CN203649595U (en) | 2013-12-23 | 2013-12-23 | Brazed connection structure between punching head of sintered-carbide die and steel base |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203649595U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105364244A (en) * | 2015-12-21 | 2016-03-02 | 刘丹 | Welding method of hard alloy and stainless steel composite rod pin |
-
2013
- 2013-12-23 CN CN201320852280.XU patent/CN203649595U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105364244A (en) * | 2015-12-21 | 2016-03-02 | 刘丹 | Welding method of hard alloy and stainless steel composite rod pin |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220221 Address after: 330600 Industrial Park, Jing'an County, Yichun City, Jiangxi Province Patentee after: JIANGXI JIANGWU CEMENTED CARBIDE CO.,LTD. Address before: 330046 No. 118 West Beijing Road, Jiangxi, Nanchang Patentee before: JIANGXI RARE EARTH AND RARE METALS TUNGSTEN Group Corp. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140618 |