CN201900194U - Novel die structure for necking pipe fittings - Google Patents
Novel die structure for necking pipe fittings Download PDFInfo
- Publication number
- CN201900194U CN201900194U CN2010206156010U CN201020615601U CN201900194U CN 201900194 U CN201900194 U CN 201900194U CN 2010206156010 U CN2010206156010 U CN 2010206156010U CN 201020615601 U CN201020615601 U CN 201020615601U CN 201900194 U CN201900194 U CN 201900194U
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- pipe fitting
- necking
- cover
- carbide alloy
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Abstract
The utility model provides a novel die structure for necking pipe fittings, which is capable of effectively avoiding bulging, wrinkling and thinning of a pipe fitting due to compression during necking of the pipe fitting, capable of effectively overcoming the shortage that a pipe fitting, as a high-frequency welded pipe, is curved after being necked due to weld seam material of the high-frequency welded pipe, and capable of overcoming the shortage that the rear end of a pipe fitting is bulged due to high frictional compression force between a necked section and a die cavity when the necked section of the pipe fitting is too long, thereby guaranteeing necking precision of pipe fittings. The novel die structure comprises a necking die, and is characterized in that a hard alloy bushing is embedded onto an inlet end of an inner hole of the necking die, and the hard alloy bushing includes an inlet end pre-necking section and a necking section which are connected in an arc transitional manner.
Description
Technical field
The utility model relates to the pipe fitting processing technique field, is specially a kind of novel die structure that is used for pipe fitting reducing processing.
Background technology
General pipe fitting reducing processing is directly thereby pipe fitting to be pushed the purpose that reaches reducing by the reducing die, have the die hole in its reducing die, pipe fitting passes common reducing die endoporus, each point all pushes tube material on the die circular arc, pipe fitting is easy bulging or wrinkling in extrusion process, and cause that easily the material attenuation influences the pipe fitting quality, so need carry out shaping to pipe fitting usually after the general pipe fitting reducing processing, its machining accuracy is low, working (machining) efficiency is low; And when pipe fitting is ratio-frequency welded tube, because its welded seam area material is in as-quenched, quenching, to extend rate variance different greatly for zone its material and extruding of other region material in draw deformation process, when other region material percentage elongation during greater than as-quenched material percentage elongation, by diameter reducing pipe can the circular arc bending be appearred to bead direction, make the pipe fitting undergauge place and the axiality in undergauge zone not produce than mistake, and the circular arc error in the commissure is difficult for shaping, and its machining accuracy is poor, working (machining) efficiency is low; In addition, when pipe fitting undergauge length was longer, the diameter shrinkage part pipe fitting produced bigger friction and Extrusion power with undergauge concave die cavity wall in the undergauge process, when friction and Extrusion power during greater than the yield strength of tube material, the rear end does not also enter the concave die cavity place and easily produces the bulging distortion, worsens the undergauge duty.
Summary of the invention
At the problems referred to above, the utility model provides a kind of novel die structure that is used for pipe fitting reducing processing, pipe fitting bulging, wrinkling and tube wastage that it can effectively avoid pipe fitting to occur owing to being squeezed in the reducing process; And it can effectively avoid occurring crooked defective after the pipe fitting reducing owing to the weld seam material of ratio-frequency welded tube problem own makes when pipe fitting is ratio-frequency welded tube; And can solve the defective that heave the pipe fitting rear end that causes greatly owing to pipe fitting reducing length when longer, reducing section and concave die cavity friction and Extrusion power, guarantee the precision of weld-end fittings reducing processing.
Its technical scheme is such, and it comprises the reducing die body, it is characterized in that: described reducing die body endoporus entrance point is installed with the carbide alloy cover, and described carbide alloy cover comprises pre-undergauge section of entrance point and the undergauge section that arc transition connects.
It is further characterized in that: the pre-undergauge section of the entrance point that described carbide alloy packs into is a conical horn mouth shape; Described preshrunk section tapering is 60 °; Described undergauge segment length is 15mm～25mm; Described carbide alloy cover rear end is installed with alloy edge cover; Described alloy edge cover internal diameter r is slightly larger than the undergauge section internal diameter R of described carbide alloy cover; Big 0.15mm～the 0.5mm of undergauge section internal diameter R of the more described carbide alloy cover of described alloy edge cover internal diameter r.
A kind of novel die structure that is used for pipe fitting reducing processing of the present utility model, be installed with the carbide alloy cover in its reducing die body, the entrance point of carbide alloy cover adopts the pre-undergauge section of conical horn mouth shape, pipe fitting in the moment forward that produces by pre-undergauge Duan Shiqi greater than preshrunk moment, alleviate various bulging, wrinkling distortion and tube wastage that tube material produces greater than transverse yield strength because of extruding force, can effectively improve pipe fitting reducing machining accuracy; Reasonable length by control carbide alloy cover undergauge section, reduce the carbide alloy cover to finishing the friction and Extrusion power of reducing pipe fitting processed, thereby avoid pipe fitting to produce the phenomenon of bulging distortion at die import die cavity place, guarantee pipe fitting reducing quality, and in the reducing die body, the rear end of closing carbide alloy cover is installed with alloy edge cover, alloy edge cover internal diameter is more bigger than the undergauge section internal diameter of carbide alloy cover, alloy edge cover can directly play the alignment effect to pipe fitting in die, guarantee pipe fitting reducing precision, improved working (machining) efficiency.
Description of drawings
Fig. 1 is a kind of die structural representation that is used for weld-end fittings reducing processing of the present utility model;
Fig. 2 is the pre-undergauge section 4 syndeton enlarged diagrams of entrance point of A position the utility model carbide alloy cover 2 among Fig. 1.
The specific embodiment
See Fig. 1, Fig. 2, it comprises reducing die body 1 the utility model, and reducing die body 1 endoporus entrance point is installed with carbide alloy cover 2, and carbide alloy cover 2 comprises the pre-undergauge section 4 of entrance point and undergauge section 5 that arc transition connects; Carbide alloy overlaps the pre-undergauge section 4 of 2 entrance points and is conical horn mouth shape; Preshrunk section 4 taperings are 60 °; Undergauge section 5 length are 15mm～25mm; Carbide alloy overlaps 2 rear ends and is installed with alloy edge cover 3; Alloy edge cover 3 internal diameter r are slightly larger than the undergauge section internal diameter R of carbide alloy cover 2; Alloy edge cover 3 internal diameter r are than the big 0.15mm～0.05mm of undergauge section internal diameter R of carbide alloy cover 2.
Specifically describe the process of using the utility model structure pipe fitting to be carried out reducing processing below: the piece-holder clamping 7 of shrinkage waiting open pipe fitting 6 being fixed in lathe, lathe drives piece-holder clamping and reducing die matched moulds, enter undergauge section 5 after preshrunk section 4 preshrunks of pipe fitting 6 by carbide alloy cover in the die, push the pipe fitting necking forming by 2 pairs of pipe fittings of carbide alloy cover 6, after the pipe fitting finished of reducing has entered alloy edge cover 3, as influenced by material to occur bending and deformation, alloy edge cover 3 can carry out alignment to pipe fitting, and because alloy edge cover internal diameter is more smaller than carbide alloy cover internal diameter, alloy edge cover can not produce friction and Extrusion power to pipe fitting, has guaranteed that the bulging phenomenon does not appear in the end that the pipe fitting rear end does not also enter the carbide alloy cover.
Claims (5)
1. novel die structure that is used for pipe fitting reducing processing, it comprises the reducing die body, it is characterized in that: described reducing die body endoporus entrance point is installed with the carbide alloy cover, and described carbide alloy cover comprises pre-undergauge section of entrance point and the undergauge section that arc transition connects.
2. a kind of novel die structure that is used for pipe fitting reducing processing according to claim 1, it is characterized in that: the pre-undergauge section of the entrance point that described carbide alloy packs into is a conical horn mouth shape, described preshrunk section tapering is 60 °, and described undergauge segment length is 15mm～25mm.
3. a kind of novel die structure that is used for pipe fitting reducing processing according to claim 1 is characterized in that: described carbide alloy cover rear end is installed with alloy edge cover.
4. a kind of novel die structure that is used for pipe fitting reducing processing according to claim 3 is characterized in that: described alloy edge cover internal diameter r is slightly larger than the undergauge section internal diameter R of described carbide alloy cover.
5. a kind of novel die structure that is used for pipe fitting reducing processing according to claim 4 is characterized in that: the big 0.15mm～0.5mm of undergauge section internal diameter R of the more described carbide alloy cover of described alloy edge cover internal diameter r.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206156010U CN201900194U (en) | 2010-11-19 | 2010-11-19 | Novel die structure for necking pipe fittings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206156010U CN201900194U (en) | 2010-11-19 | 2010-11-19 | Novel die structure for necking pipe fittings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201900194U true CN201900194U (en) | 2011-07-20 |
Family
ID=44270797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206156010U Expired - Fee Related CN201900194U (en) | 2010-11-19 | 2010-11-19 | Novel die structure for necking pipe fittings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201900194U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102139330A (en) * | 2010-11-19 | 2011-08-03 | 无锡曙光模具有限公司 | Novel female die structure for necking pipe fittings |
| CN102303218A (en) * | 2011-09-23 | 2012-01-04 | 浙江佑安高科消防系统有限公司 | Machining method of plunger for door closer and special die thereof |
| CN110185198A (en) * | 2019-05-16 | 2019-08-30 | 广西科技大学鹿山学院 | A kind of fixing end anchorage and preparation method thereof of multilayer steel wire structural steel twisted wire |
| CN112475074A (en) * | 2020-12-04 | 2021-03-12 | 宁波天鑫金属软管有限公司 | Necking method of thin-wall pipe fitting and necking equipment applying same |
-
2010
- 2010-11-19 CN CN2010206156010U patent/CN201900194U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102139330A (en) * | 2010-11-19 | 2011-08-03 | 无锡曙光模具有限公司 | Novel female die structure for necking pipe fittings |
| CN102303218A (en) * | 2011-09-23 | 2012-01-04 | 浙江佑安高科消防系统有限公司 | Machining method of plunger for door closer and special die thereof |
| CN102303218B (en) * | 2011-09-23 | 2013-06-05 | 浙江佑安高科消防系统有限公司 | Machining method of plunger for door closer and special die thereof |
| CN110185198A (en) * | 2019-05-16 | 2019-08-30 | 广西科技大学鹿山学院 | A kind of fixing end anchorage and preparation method thereof of multilayer steel wire structural steel twisted wire |
| CN112475074A (en) * | 2020-12-04 | 2021-03-12 | 宁波天鑫金属软管有限公司 | Necking method of thin-wall pipe fitting and necking equipment applying same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110720 Termination date: 20161119 |