CN202490838U - Steel pipe cold-drawing mould with functions of twice reducing and twice forming - Google Patents
Steel pipe cold-drawing mould with functions of twice reducing and twice forming Download PDFInfo
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- CN202490838U CN202490838U CN2012201363422U CN201220136342U CN202490838U CN 202490838 U CN202490838 U CN 202490838U CN 2012201363422 U CN2012201363422 U CN 2012201363422U CN 201220136342 U CN201220136342 U CN 201220136342U CN 202490838 U CN202490838 U CN 202490838U
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- reducing
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Abstract
The utility model discloses a steel pipe cold-drawing mould with functions of twice reducing and twice forming, and relates to a machining mould. The steel pipe cold-drawing mould consists of two parts, namely an inner mould and an outer mould, wherein the front end of an inner hole of the outer mould is a cone reducing belt; the back end of the inner hole of the outer mould is a round hole forming belt; the inner mould is inserted into the hole of the outer mould; the inner mould is connected with a draw bar fixed base of a cold drawing machine through a draw bar and a nut gasket assembly; a blank to be drawn passes through from the middle of the inner mould and the outer mould. The steel pipe cold-drawing mould is characterized in that a first cone surface reducing belt, a first cylinder forming belt, a second cone surface reducing belt and a second cylinder forming belt are sequentially manufactured on the outer circle surface of the inner mould. The cold drawing production in the first pass is completed instead of the cold drawing production in the two passes before, so that the production efficiency is improved more than twice, and the manufacturing cost is saved; and moreover, the deformation for the second time belongs to warm drawing, so that the plasticity of the steel pipe is good, the linearity, the size accuracy and the smooth finishing of the drawn product can be greatly improved, and the quality of the produced cold-drawing steel pipe is superior to that of the product which is produced in two passes.
Description
Technical field
The utility model relates to a kind of steel processing mold, is specifically related to a kind of mould of producing cold drawing steel tube.
Technical background
Along with developing rapidly of China's oil cylinder manufacturing, cold drawing steel tube uses in the manufacturing of cylinder tube in a large number.Traditional employed cold drawing die of steel pipe cold-drawing technology adopts two groups of moulds, carries out twice cold-drawn respectively, and technology is loaded down with trivial details, and production efficiency is low.To utilize external diameter is that 194mm, internal diameter are that the drawn tube of the hot-rolled pipe blank processing Φ 185*12.5 of 162 mm is an example, and its production procedure is following:
To carry out annealing in process to the hot-rolled pipe blank before the cold-drawn, carry out the surface lubrication processing then and an end of managing is carried out turning processing, make it to pass interior external mold.
The first passage cold-drawn reaches external diameter 185mm, internal diameter 157mm.
After first passage, also to carry out surface lubrication processing and turning processing again.
The second passage cold-drawn, reaching needs specification Φ 185*12.5.Cold drawing steel tube external diameter 185mm, internal diameter 160mm.
This shows that the cold-drawn passage is many, cause the cold-drawn cost high, yield poorly.And the exploitation of present large hydraulic cold-draw equipment is very ripe, enough big cold-drawn strength can be provided, under the prerequisite that does not reduce the drawn tube quality; Reduce the cold-drawn passage; Reducing the cold-drawn cost, improve cold-drawn production efficiency, has been the development problem that cold-drawn industry is badly in need of solution.
Summary of the invention
For solving the problems of the technologies described above; The utility model provides a kind of steel pipe cold drawing die with twice reducing and twice setting function; Make first conical surface reducing band, first cylinder setting band, second conical surface reducing band and second cylinder setting band on the periphery of its internal mold successively, in the passage cold-drawn, internal mold has twice reaming reducing and twice cylinder setting; Accomplish the workload of original two passages, production efficiency is enhanced about more than once.
The utility model is realized through following technical scheme: a kind of steel pipe cold drawing die with twice reducing and twice setting function, form by internal mold and external mold two parts.Described external mold is installed on the drawbench through the outer model fixing seat of drawbench, and the front end of external mold endoporus is a taper hole reducing band, and the rear end of external mold endoporus is a circular hole setting band.Described internal mold is inserted in the hole of external mold, and internal mold is connected with drawbench pull bar holder with the nut collar assembly through pull bar.Treat that the throwing material passes through from the gap between internal mold and the external mold.It is characterized in that: make first conical surface reducing band, first cylinder setting band, second conical surface reducing band and second cylinder setting band on the periphery of described internal mold successively.
The good effect of the utility model is:
1, passage is accomplished the output of intrinsic two passages, enhances productivity more than one times, reduces production costs, and increases economic efficiency.
2, take the company of reasonable distribution to pull out technology, secondary deformation belongs to temperature and pulls out, and the plasticity of blank is better, and steel pipe linearity, dimensional accuracy and fineness that cold-drawn goes out all are greatly improved.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is done further explain.
Fig. 1 is the utility model working state schematic representation.
Fig. 2 is the internal model structure sketch map.
Fig. 3 is the cast outer mold structure sketch map.
Among the figure: 1, drawbench pull bar holder, 2, pull bar, 3, treat the throwing material, 4, external mold; 4-1, taper hole reducing band, 4-2, circular hole setting band, 5, internal mold; 5-1, first conical surface reducing band, 5-2, first cylinder setting band, 5-3, second conical surface reducing band; 5-4, second cylinder setting band, 6, the nut collar assembly, 7, the outer model fixing seat of drawbench.
The specific embodiment
Like Fig. 1, Fig. 2, shown in Figure 3: a kind of steel pipe cold drawing die with twice reducing and twice setting function, form by internal mold 5 and external mold 4 two parts.Described external mold 4 is installed on the drawbench through the outer model fixing seat 7 of drawbench, and the front end of external mold 4 endoporus is taper hole reducing band 4-1, and the rear end of external mold 4 endoporus is circular hole setting band 4-2.Described internal mold 5 is inserted in the hole of external mold 4, and internal mold 5 is connected with drawbench pull bar holder 1 with nut collar assembly 6 through pull bar 2.Treat that throwing material 3 passes through from the gap between internal mold 5 and the external mold 4.It is characterized in that: make first conical surface reducing band 5-1, first cylinder setting band 5-2, second conical surface reducing band 5-3 and second cylinder setting band 5-4 on the periphery of described internal mold 5 successively.
As shown in Figure 1: the processing technology and the intrinsic steel pipe cold drawing die technology of steel pipe cold drawing die with twice reducing and twice setting function is basic identical, and process route is following:
1, the check hot-rolled pipe is treated throwing material 3, requires the surface bright and clean, does not have tangible hot rolling defective.
2, treat throwing material 3 and carry out annealing in process, annealing temperature is generally about 800 ° of C, eliminates defectives such as internal stress, reduction surface chill degree.
3, treat throwing material 3 surfaces and be lubricated processing, generally require lubricating layer thickness to reach more than the 10 μ m.
4, an end of treating throwing material 3 carries out turning processing, makes it to pass inside and outside mould 5, the gap between 4, and the Vehicle Processing section is connected with drawbench power.
5, with internal mold 5, external mold 4 with treat that throwing material 3 is installed on the drawbench; Carry out cold-drawn processing; Treat throwing material 3 successively through taper hole reducing band 4-1 on first conical surface reducing band 5-1 on the internal mold 5, first cylinder setting band 5-2, second conical surface reducing band 5-3 and second cylinder setting band 5-4 and external mold 4 endoporus and the gap between the circular hole setting band 4-2, its caliber and pipe thickness reach design size.
It should be noted that; After treating that throwing material 3 is through first conical surface reducing band 5-1 and first cylinder setting band 5-2; Because crimp produces great amount of heat; To treat that throwing material 3 temperature are raised to more than 200 degrees centigrade, and make the plasticity of blank better, steel pipe linearity, dimensional accuracy and fineness that cold-drawn goes out all are greatly improved.
Claims (1)
1. the steel pipe cold drawing die with twice reducing and twice setting function is made up of internal mold (5) and external mold (4) two parts; Described external mold (4) is installed on the drawbench through the outer model fixing seat (7) of drawbench, and the front end of external mold (4) endoporus is a taper hole reducing band (4-1), and the rear end of external mold (4) endoporus is a circular hole setting band (4-2); Described internal mold (5) is inserted in the hole of external mold (4), and internal mold (5) is connected with drawbench pull bar holder (1) with nut collar assembly (6) through pull bar (2); Treat that throwing material (3) passes through from the gap between internal mold (5) and the external mold (4); It is characterized in that: make first conical surface reducing band (5-1), first cylinder setting band (5-2), second conical surface reducing band (5-3) and second cylinder setting band (5-4) on the periphery of described internal mold (5) successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201363422U CN202490838U (en) | 2012-04-01 | 2012-04-01 | Steel pipe cold-drawing mould with functions of twice reducing and twice forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201363422U CN202490838U (en) | 2012-04-01 | 2012-04-01 | Steel pipe cold-drawing mould with functions of twice reducing and twice forming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202490838U true CN202490838U (en) | 2012-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201363422U Withdrawn - After Issue CN202490838U (en) | 2012-04-01 | 2012-04-01 | Steel pipe cold-drawing mould with functions of twice reducing and twice forming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202490838U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102632093A (en) * | 2012-04-01 | 2012-08-15 | 徐州徐工液压件有限公司 | Steel pipe cold-drawing mould with twice-reducing and twice-shaping functions |
-
2012
- 2012-04-01 CN CN2012201363422U patent/CN202490838U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102632093A (en) * | 2012-04-01 | 2012-08-15 | 徐州徐工液压件有限公司 | Steel pipe cold-drawing mould with twice-reducing and twice-shaping functions |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121017 Effective date of abandoning: 20141126 |
|
| RGAV | Abandon patent right to avoid regrant |