CN203155735U - Compound cold-drawing lining core internal mould - Google Patents
Compound cold-drawing lining core internal mould Download PDFInfo
- Publication number
- CN203155735U CN203155735U CN 201320128782 CN201320128782U CN203155735U CN 203155735 U CN203155735 U CN 203155735U CN 201320128782 CN201320128782 CN 201320128782 CN 201320128782 U CN201320128782 U CN 201320128782U CN 203155735 U CN203155735 U CN 203155735U
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- China
- Prior art keywords
- ring
- internal mould
- cold
- outer shroud
- lining core
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- Expired - Fee Related
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Abstract
The utility model discloses a compound cold-drawing lining core internal mould and relates to a lining core internal mould for cold-drawing of a seamless steel tube. The compound cold-drawing lining core internal mould comprises a ring-shaped base body, wherein a fixed internal mould core rod is connected on the center of the base body; the base body is formed by connecting an inner ring and an outer ring in a sleeved manner and fixed by welding; a plurality of grooves are arranged on the matched surface of the inner ring and the outer ring; the outer ring is made of hard alloy; and the inner ring is made of common 45# steel. According to the compound cold-drawing lining core internal mould disclosed by the utility model, the internal mould base body is made into an inner-outer two-layer compound structure; and the hard alloy material and the common carbon steel are combined, so that the abrasion resistance and the impact toughness are improved.
Description
Technical field
The utility model relates to solid drawn tube with serving as a contrast the in-core mould.
Background technology
China is solid drawn tube first big country in the world, also is outlet first big country, because output is very big, so in Cold Drawing Process, so long as go out needed size and wall thickness by bigger bore, thicker wall cold-drawn, must use lining in-core mould, so the lining in-core modulus amount of using is huge.
Since cold-drawing technology be external mold, steel pipe, lining in-core mould at normal temperatures, in the same working region by draw hollow billet one end firmly, rely on crack between external mold and the internal mold to make a kind of technology of hollow billet distortion.This makes the surface abrasion resistance of lining in-core mould seem particularly important with the bulk strength that serves as a contrast the in-core mould.If above two aspects do not reach the cold-drawn condition, then two kinds of problems can appear in the steel pipe of cold-drawn, 1, not wear-resisting rough 2, the internal mold insufficient strength of steel pipe inwall that causes in internal mold surface, undergauge, the ips of draw has deviation, it is defective finally either way to result in tube product, causes tremendous loss.
The internal mold of traditional handicraft generally is made up of two kinds of materials: one, by carbide alloy material as a whole; Two, common 45# steel is after nitrogencase hardening is ground to size, plating hard chromium on surface.The former needs alloy quantity big, particularly the lining in-core mould of big specification owing to be whole for carbide alloy, an internal mold reaches tens kilograms, and prices are rather stiff, and its Main Ingredients and Appearance tungsten, cobalt are the national strategy goods and materials, country is also progressively controlling purposes, the surface abrasion resistance height, and intensity has also become problem.And because internal mold integral body is alloy; in factory's operation use; the workman can strike external mold or steel pipe unavoidably because of carelessness when debugging when operation; the phenomenon of the module of breaking in adjustment also takes place often; cause mould to scrap; increase the production cost of enterprise so virtually, so do not select to use this type of mould during the general factory product that not to be special requirement high.Latter's technology on making is more loaded down with trivial details, but cost is lower, but because its internal mold is the common medium-carbon steel carburizing and quenching, the surface can only reach the following hardness of HRC60, and intensity also reduces the phenomenon ubiquity of undergauge greatly than the former material.Particularly serve as a contrast in-core mould surface and will carry out electroplating processes technology; total institute is known; plating is a kind of pollution operation; chromium is a heavy metal species; to the life injury greatly; cause serious pollution can for our environment, bring very big health hazard for our workman, because country payes attention to day by day to environmental protection; enterprise is more and more higher to the requirement of the processing of the quality materials after electroplating; the also cost of manufacture of invisible increase internal mold, it is rough that this type of mould the steel pipe inwall occurs through regular meeting in process of production, and steel is stained with on the internal mold surface; the internal mold undergauge; in process of tube plug drawing mill, pipe diameter diminishes, and causes defect ware.Present most of steel pipe's production producer still generally uses this type of mould to be the master, but does not have the higher product of cost performance to occur at present again.
Summary of the invention
The utility model is at above-mentioned deficiency, and a kind of simple, long service life, compound cold-drawn lining in-core mould that cost is low made is provided.
Key problem in technology of the present utility model is the internal mold matrix is made inside and outside two layer composite structure; by Hardmetal materials and ordinary carbon steel combination; improve wearability and impact flexibility; concrete technical scheme is: a kind of compound cold-drawn lining in-core mould; comprise the ring-type matrix; the matrix center is connected and fixed the internal mold core bar; it is characterized in that described matrix is made of interior ring, outer shroud socket and welds fixing; ring offers some grooves with the outer shroud matching surface in described; described outer shroud is carbide alloy, and described interior ring is common 45# steel.
As preferably, the carbide alloy of outer shroud is preferably material YG20, and hardness is HRA70 ~ 90, most preferably is HRA80.
Ring offers some grooves with the outer shroud matching surface in the technique scheme, and phase-contact surface is processed into concavo-convex phenomenon, improves adhesion when ring and outer shroud weld fixedly in making, makes that welding is more firm.
For better solving above-mentioned the deficiencies in the prior art, the preparation method of compound cold-drawn lining in-core mould is provided, it is characterized in that may further comprise the steps: at first be processed into the outer shroud of described matrix with the carbide alloy of YG20, be processed into interior ring with common 45# steel; Secondly process several grooves at interior ring surface, then with outer shroud and the mutual socket of interior ring, and by high-frequency welding inner and outer ring is connected and fixed, fix at last at interior ring center socket inner mould core bar, and with nut check.
The beneficial effects of the utility model: the utility model internal mold outer shroud is by whole alloy composition, its working face has very high wearability, service life is suitable with prior art material one, more than 200 times, intensity is also very high, reaches 200kg/m ㎡ than the raising of two life-spans of prior art material, so the undergauge phenomenon can not occur yet, guaranteed the steel pipe inwall smooth and internal diameter size accurately, innerly constituted by common iron, saved carbide alloy greatly.The internal mold of both so integrally welded cooperations particularly; outer strong interior gentle; integral body has good impact flexibility; not fragile internal mold in the operation adjustment process; combine the advantage of both materials of prior art; have surface higher wearability and whole high-intensity advantage; both defectives have been rejected; the production cost of Jie Yueing greatly; for country saves strategic materials tungsten, cobalt (the carbide alloy Main Ingredients and Appearance is tungsten, cobalt), particularly save electroplating technology, protected our production environment; and cost is lower, and the industry that is suitable for is used.
Description of drawings
Fig. 1 is structural representation of the present utility model.
The specific embodiment
A kind of compound cold-drawn lining in-core mould, comprise ring-type matrix 001, matrix 001 center is connected and fixed internal mold core bar 002, described matrix 001 is made of interior ring 011, outer shroud 012 socket and welds fixing, ring 011 offers some grooves 111 with outer shroud 012 matching surface in described, and described outer shroud 012 is carbide alloy, and described interior ring 011 is common 45# steel, described outer shroud is YG20, and hardness is HRA80.
The molded method of doing of a kind of compound cold-drawn lining in-core may further comprise the steps: at first be processed into the outer shroud 012 of described matrix with the carbide alloy of YG20, ring 011 in being processed into common 45# steel; Secondly at interior several grooves 111 of ring 011 Surface Machining, then with outer shroud 012 and the 011 mutual socket of interior ring, and by high-frequency welding inner and outer rings (011,012) is connected and fixed, fix at last at interior ring 011 center socket inner mould core bar 002, and with nut check.
Claims (2)
1. a compound cold-drawn serves as a contrast the in-core mould, comprise the ring-type matrix, the matrix center is connected and fixed the internal mold core bar, it is characterized in that described matrix is made of interior ring, outer shroud socket and welds fixing, ring offers some grooves with the outer shroud matching surface in described, described outer shroud is carbide alloy, and described interior ring is common 45# steel.
2. a kind of compound cold-drawn lining in-core mould according to claim 1 is characterized in that described outer shroud is YG20, and hardness is HRA70 ~ HRA90.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320128782 CN203155735U (en) | 2013-03-21 | 2013-03-21 | Compound cold-drawing lining core internal mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320128782 CN203155735U (en) | 2013-03-21 | 2013-03-21 | Compound cold-drawing lining core internal mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203155735U true CN203155735U (en) | 2013-08-28 |
Family
ID=49016959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320128782 Expired - Fee Related CN203155735U (en) | 2013-03-21 | 2013-03-21 | Compound cold-drawing lining core internal mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203155735U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103212599A (en) * | 2013-03-21 | 2013-07-24 | 宜兴市创天管业有限公司 | Composite cold-drawing lining core inner mold and its making method |
| CN111195658A (en) * | 2020-01-08 | 2020-05-26 | 河北金奥管业有限公司 | Special-shaped rocker shaft seamless steel tube and forming method thereof |
-
2013
- 2013-03-21 CN CN 201320128782 patent/CN203155735U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103212599A (en) * | 2013-03-21 | 2013-07-24 | 宜兴市创天管业有限公司 | Composite cold-drawing lining core inner mold and its making method |
| CN111195658A (en) * | 2020-01-08 | 2020-05-26 | 河北金奥管业有限公司 | Special-shaped rocker shaft seamless steel tube and forming method thereof |
| CN111195658B (en) * | 2020-01-08 | 2021-10-08 | 河北金奥精工技术有限公司 | Special-shaped rocker shaft seamless steel tube and forming method thereof |
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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 |
Granted publication date: 20130828 Termination date: 20160321 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |