CN107263134A - A kind of supporting tool and forming method for thin-wall bend cold forming - Google Patents
A kind of supporting tool and forming method for thin-wall bend cold forming Download PDFInfo
- Publication number
- CN107263134A CN107263134A CN201710306597.6A CN201710306597A CN107263134A CN 107263134 A CN107263134 A CN 107263134A CN 201710306597 A CN201710306597 A CN 201710306597A CN 107263134 A CN107263134 A CN 107263134A
- Authority
- CN
- China
- Prior art keywords
- elbow
- curved support
- support valve
- thin
- straight tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q2703/00—Work clamping
- B23Q2703/02—Work clamping means
- B23Q2703/10—Devices for clamping workpieces of a particular form or made from a particular material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L43/00—Bends; Siphons
- F16L43/001—Bends; Siphons made of metal
Abstract
The invention discloses a kind of supporting tool and forming method for thin-wall bend cold forming, this method is to set supporting tool in the straight tube blank to be processed for elbow, then supporting tool is taken out after carrying out cold moudling, cold moudling to straight tube blank with cold stamping die, elbow is obtained.The technology of the present invention is reliable and practical, it is simple to operate, efficiency high, easily there are the phenomenons such as flattening, fold in circular arc position during efficiently solving nonferrous materials elbow cold moudling, and Fixture Design is solved into release problems simultaneously into two valves, the quality and yield rate of elbow are improved, and substantially reduces production cost, economic benefit is significantly improved.
Description
Technical field
The invention belongs to pipe fitting processing technique field, it is related to elbow machine-shaping, it is especially a kind of cold for thin-wall bend
The supporting tool and forming method of shaping.
Background technology
Non-ferrous metal such as titanium, zirconium, tantalum, nickel, due to these materials in the industries such as oil, chemical industry, pharmacy it is more severe
Under the working condition at quarter, good anti-corrosion, high temperature strength can be shown, widely should the features such as good thermal conductivity
With.But these materials are more sensitive for the gas componant in air, except suction hydrogen phenomenon just occurs in zirconium material at normal temperatures
Outside, different degrees of suction hydrogen, oxygen uptake, the phenomenon for inhaling nitrogen occurs in remaining several metal more than 200 DEG C, and with temperature
The rise phenomenon it is stronger, so as to cause material to become fragile, performance degradation.Although in the daily production of non-ferrous metal elbow usually
Thermoforming process can be used, but always inevitably uses some safeguard measures simultaneously, cost is so not only added, also makes
Molding process becomes more cumbersome, low production efficiency.Therefore, the preparation of non-ferrous metal elbow preferably with it is appropriate it is cold into
Type method is realized.
At present, the bend forming apparatus and method of prior art are big designs and formulates both for carbon steel and stainless steel material
, and be not then very applicable for non-ferrous metal.For example, sensitiveness of the nonferrous materials to surface scratch, and surface scratch
The probability that crevice corrosion occurs for metal can be improved, makes the reduction of its corrosion resistance, so equipment or mould and material had better not be used
Between can occur the forming method of larger friction.But if using the method for direct brake forming, then easily appear in " R " area
Inner arc side produces fold, or even the problems such as area's pipe is directly crushed.Therefore, in order to prevent surface during bend forming
The appearance for the problems such as being scratched, and fold locally occurs in pipe, or even be crushed by transition, it is ensured that elbow quality, reduction manufacture
Cost, improves production efficiency, and the present invention proposes a kind of new method.
The content of the invention
It is an object of the invention to the shortcoming for overcoming above-mentioned prior art, there is provided a kind of branch for thin-wall bend cold forming
Frock and forming method are supportted, this method is using the method increase pipe rigidity for adding supporting tool in pipe, it is ensured that it can be very
Good shaping.
The purpose of the present invention is achieved through the following technical solutions：
Present invention firstly provides a kind of supporting tool for thin-wall bend cold forming, by the first symmetrical arc branch
Support valve and the second curved support valve is assembled, wherein in lower surface after the first curved support valve and the second curved support valve are assembled
Form the arcwall face being adapted with elbow camber.
Further, the position of above-mentioned first curved support valve and each comfortable splicing of the second curved support valve is provided with support column,
After the first curved support valve and assembled the second curved support valve, two support columns are spliced to form the straight tube for withstanding elbow to be processed
The solid round table-like supporting table of base internal face.
Further, the outer arc radius R of above-mentioned first curved support valve and the second curved support valve and required shaping are curved
Relation between the radius of head is R=r+d/2- δ；Wherein, r is molded the flexual center radius of elbow for needed for；D is molded elbow for needed for
Diameter；δ is molded the wall thickness of elbow for needed for；The outer arc length of the first curved support valve and the second curved support valve
L=π R/2.
Further, straight tube blank internal diameter (d-2 δ) small 0.5~1mm of above-mentioned supporting table diameter D than required shaping elbow.
Further, above-mentioned supporting table outer arc length L ˊ=L/3, the high H=D/3 of round platform；Supporting table both sides circular arc thickness W=
D/3。
The present invention also proposes a kind of thin-wall bend cold forming method based on above-mentioned supporting tool：In the straight of elbow to be processed
Supporting tool is set in pipe, supporting tool is taken out after then carrying out cold moudling, cold moudling to straight tube blank with cold stamping die,
Obtain elbow.Specifically include following steps：
Step 1: selecting nonferrous metal tube according to the material and developed dimension to be molded elbow and being cut, obtain
The straight tube blank of elbow；
Step 2: the first curved support valve and the second curved support valve that selection is dimensioned for, and be put into inside straight tube blank
Middle part；
Step 3: the straight tube blank for being put into the first curved support valve and the second curved support valve is placed under cold stamping die
On mould；
Step 4: driving upper mould to push straight tube blank with press makes its slow flexural deformation；
Step 5: after the upper and lower mould of cold stamping die fully comes together, keeping a period of time and then pressure release；
Step 6: the elbow pressed is removed from mould, and take out the first curved support valve and the second curved support valve；
Step 7: carrying out stress relief annealing, surface treatment to elbow；
Step 8: excision elbow two ends additional length, and welding groove is processed, obtain finished product elbow.
Further, in above step four, press drives upper mould to push straight tube blank with 5mm/s speed.
Further, in above step five, it is upper and lower close up after keep 30s.
Further, in above step three, the lower mould of the cold stamping die is cavity plate, and by the middle of straight tube blank with the first arc
The midfoot support post alignment of valve and the second curved support valve is supported, is put into together in the middle of lower mould, and is directed at upper mould minimum point.
Compared with prior art, the invention has the advantages that：
(1) present invention can efficiently solve the problem of nonferrous materials bend forming difficulty is big, and the present invention is used
Built-in supporting tool, you can by the direct cold moudling of nonferrous materials elbow, reached with product quality height, high yield rate
99% distinguishing feature.
(2) present invention had both avoided mould and the transition frictionally damage elbow surface in pipe forming process, and effectively control
There is inner arc corrugation in manufactured goods elbow, the generation for the phenomenon such as be locally crushed.
(3) the technology of the present invention is novel, reliable and practical, simple to operate, is particularly suitable for use in the higher nonferrous materials of price
The batch production of elbow processed, can substantially reduce production cost, and the corrosion resistance of material in itself can be kept again, enterprise is significantly improved
Economic benefit.
Brief description of the drawings
Fig. 1 is bend forming schematic diagram of the present invention；
Fig. 2 be bend forming supporting tool schematic diagram of the present invention, (a) elbow and supporting tool, (b) for supporting tool just
View, (c) is supporting tool side view；
Nonferrous materials manufactured goods elbow schematic diagrames of the Fig. 3 for the present invention required for final.
Wherein：1 is elbow；2 be the first curved support valve；3 be the second curved support valve；4 be support column；1-1 is lower mould；
1-2 is straight tube blank；1-3 is supporting tool；1-4 is upper mould.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
Referring to Fig. 1-3：The thin-wall bend cold forming method of the present invention is that support is set in the straight tube blank of elbow 1 to be processed
Frock, supporting tool is taken out after then carrying out cold moudling, cold moudling to straight tube blank with cold stamping die, obtains elbow 1.This hair
The supporting tool concrete structure of bright use is as follows：
Referring to Fig. 2：Present invention firstly provides the supporting tool for thin-wall bend cold forming, by symmetrical first
The curved support valve 3 of curved support valve 2 and second is assembled, wherein the first curved support valve 2 and the second curved support valve 3 are assembled
The arcwall face being adapted with the camber of elbow 1 is formed in lower surface afterwards.
The position of above-mentioned first curved support valve 2 and each comfortable splicing of the second curved support valve 3 is provided with support column 4, when the
After one curved support valve 2 and the assembly of the second curved support valve 3, two support columns 4 are spliced to form the straight tube for withstanding elbow 1 to be processed
The solid round table-like supporting table of base internal face.The outer arc radius R of first curved support valve 2 and the second curved support valve 3 with
Relation between the radius of required shaping elbow 1 is R=r+d/2- δ；Wherein, r is molded the flexual center radius of elbow 1 for needed for；D is
The diameter of required shaping elbow 1；δ is molded the wall thickness of elbow 1 for needed for；The first curved support valve 2 and the second curved support
The outer arc length L=π R/2 of valve 3.The supporting table diameter D is smaller than the straight tube blank internal diameter (d-2 δ) of required shaping elbow 1
0.5~1mm.The supporting table outer arc length L ˊ=L/3, the high H=D/3 of round platform；Supporting table both sides circular arc thickness W=D/3.
Based on the supporting tool described above for thin-wall bend cold forming, thin-wall bend cold forming method tool of the invention
Body comprises the following steps：
Step 1: selecting nonferrous metal tube according to the material and developed dimension to be molded elbow and being cut, obtain
The straight tube blank of elbow 1；
Step 2: the first curved support valve 2 and the second curved support valve 3 that selection is dimensioned for, and be put into straight tube blank
Portion middle part；
Step 3: the straight tube blank for being put into the first curved support valve 2 and the second curved support valve 3 is placed into cold stamping die
On lower mould；
Step 4: driving upper mould to push straight tube blank with press makes its slow flexural deformation；
Step 5: after the upper and lower mould of cold stamping die fully comes together, keeping a period of time and then pressure release；
Step 6: the elbow 1 pressed is removed from mould, and take out the first curved support valve 2 and the second curved support
Valve 3；
Step 7: carrying out stress relief annealing, surface treatment to elbow 1；
Step 8: the excision two ends additional length of elbow 1, and welding groove is processed, obtain finished product elbow 1.
In highly preferred embodiment of the present invention：In above step three, the lower mould of the cold stamping die is cavity plate, and by straight tube
With the first curved support valve 2 and the supporting table justified at the middle part of the second curved support valve 3 in the middle of base, it is put into together in lower mould
Between, and it is directed at upper mould minimum point.In step 4, press drives upper mould to push straight tube blank with 5mm/s speed.In step 5, upper,
Under close up after keep 30s.
Below in conjunction with specific embodiment, the present invention is further described：
The material of the elbow of the present embodiment is pure titanium, and specification is the -2-TA2 90E (L) of DN50 I.
The forming method of the elbow of the present embodiment comprises the following steps：
Step 1: selecting TA2 materials 57 × 2mm of Φ seamless pipes as requested and being cut, the straight tube blank of elbow is obtained
Length is 165mm；
Step 2: selection inner support frock
R=r+d/2- δ=102mm
L=π R/2=160mm
D=52mm
L ˊ=L/3=53mm
H=D/3=17mm
W=D/3=17mm
And the symmetrical curved support valve 3 of first curved support valve 2 and second of two panels is combined be put into inside straight tube blank
Middle part；
Step 3: the centre of two supporting tables 4 in the middle part of supporting tool will be placed in the middle of straight tube blank, and it is put into lower mould (cavity plate)
Centre, while upper mould (punch-pin) minimum point of alignment；
Step 4: making its slow flexural deformation with there is press to drive upper mould to push straight tube blank with 5mm/s speed；
Step 5: after the upper and lower mould of cold stamping die fully comes together, keeping 30s；
Step 6: the elbow pressed is removed from mould, and take out inner support frock；
Step 7: carrying out stress relief annealing, surface treatment to elbow；
Step 8: excision elbow two ends additional length, and welding groove is processed, obtain finished product elbow.
The present embodiment can effectively solve the problem that the problem of nonferrous materials bend forming difficulty is big；The present invention uses built-in
Supporting tool, you can by the direct cold moudling of nonferrous materials elbow；The present invention had both avoided mould and had been molded with pipe
Transition frictionally damage elbow surface in journey, but there is inner arc corrugation in effectively control finished product elbow, the phenomenon such as be locally crushed
Occur；Party's law technology is novel, reliable and practical, simple to operate, is particularly suitable for use in the higher nonferrous materials elbow of price
Batch production, production cost can be substantially reduced, the corrosion resistance of material in itself can be kept again, the economic effect of enterprise is significantly improved
Benefit.
It is described above, only it is presently preferred embodiments of the present invention, not the present invention is imposed any restrictions, it is every according to the present invention
Any simple modification, change and equivalent structure change that technical spirit is made to above example, still fall within skill of the present invention
In the protection domain of art scheme.
Claims (10)
1. a kind of supporting tool for thin-wall bend cold forming, it is characterised in that by the first symmetrical curved support valve
(2) and the second curved support valve (3) is assembled, wherein after the first curved support valve (2) and the second curved support valve (3) are assembled
The arcwall face being adapted with elbow (1) camber is formed in lower surface.
2. the supporting tool according to claim 1 for thin-wall bend cold forming, it is characterised in that first arc
Valve (2) and the position of each comfortable splicing of the second curved support valve (3) is supported to be provided with support column (4), when the first curved support valve (2)
After the assembly of the second curved support valve (3), two support columns (4) are spliced to form the straight tube blank inwall for withstanding elbow to be processed (1)
The solid round table-like supporting table in face.
3. the supporting tool according to claim 2 for thin-wall bend cold forming, it is characterised in that first arc
Support the relation between valve (2) and the outer arc radius R of the second curved support valve (3) and the radius of required shaping elbow (1)
For R=r+d/2- δ；Wherein, r is molded the flexual center radius of elbow (1) for needed for；D is molded the diameter of elbow (1) for needed for；δ is institute
The wall thickness of elbow (1) need to be molded；The first curved support valve (2) and the outer arc length L=of the second curved support valve (3)
πR/2。
4. the supporting tool according to claim 2 for thin-wall bend cold forming, it is characterised in that the supporting table is straight
Straight tube blank internal diameter (d-2 δ) small 0.5~1mm of footpath D shaping elbows (1) than needed for.
5. the supporting tool according to claim 4 for thin-wall bend cold forming, it is characterised in that outside the supporting table
Side arc length L ˊ=L/3, the high H=D/3 of round platform；Supporting table both sides circular arc thickness W=D/3.
6. a kind of thin-wall bend of the supporting tool based on described in claim 1-5 any one for thin-wall bend cold forming is cold
Forming method, it is characterised in that supporting tool is set in the straight tube blank of elbow to be processed (1), then with cold stamping die to straight
Pipe carries out cold moudling, takes out supporting tool after cold moudling, obtains elbow (1).
7. thin-wall bend cold forming method according to claim 6, it is characterised in that specifically include following steps：
Step 1: selecting nonferrous metal tube according to the material and developed dimension to be molded elbow and being cut, elbow is obtained
(1) straight tube blank；
Step 2: the first curved support valve (2) and the second curved support valve (3) that selection is dimensioned for, and be put into straight tube blank
Portion middle part；
Step 3: the straight tube blank for being put into the first curved support valve (2) and the second curved support valve (3) is placed into cold stamping die
On lower mould；
Step 4: driving upper mould to push straight tube blank with press makes its slow flexural deformation；
Step 5: after the upper and lower mould of cold stamping die fully comes together, keeping a period of time and then pressure release；
Step 6: the elbow pressed (1) is removed from mould, and take out the first curved support valve (2) and the second curved support
Valve (3)；
Step 7: carrying out stress relief annealing, surface treatment to elbow (1)；
Step 8: excision elbow (1) two ends additional length, and welding groove is processed, obtain finished product elbow (1).
8. thin-wall bend cold forming method according to claim 7, it is characterised in that in step 4, press drives upper mould
Straight tube blank is pushed with 5mm/s speed.
9. thin-wall bend cold forming method according to claim 7, it is characterised in that in step 5, it is upper and lower close up after protect
Hold 30s.
10. thin-wall bend cold forming method according to claim 7, it is characterised in that in step 3, the cold stamping die
Lower mould be cavity plate, and by the midfoot support post in the middle of straight tube blank with the first curved support valve (2) and the second curved support valve (3)
(4) align, be put into together in the middle of lower mould, and be directed at upper mould minimum point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710306597.6A CN107263134A (en) | 2017-05-04 | 2017-05-04 | A kind of supporting tool and forming method for thin-wall bend cold forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710306597.6A CN107263134A (en) | 2017-05-04 | 2017-05-04 | A kind of supporting tool and forming method for thin-wall bend cold forming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107263134A true CN107263134A (en) | 2017-10-20 |
Family
ID=60073663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710306597.6A Pending CN107263134A (en) | 2017-05-04 | 2017-05-04 | A kind of supporting tool and forming method for thin-wall bend cold forming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107263134A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108273886A (en) * | 2018-02-27 | 2018-07-13 | 安徽盛运重工机械有限责任公司 | The one-pass molding of steel elbow makes tooling |
| CN109093330A (en) * | 2018-08-27 | 2018-12-28 | 广东思豪内高压科技有限公司 | A kind of water swelling moulding process of silencer for automobile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108273886A (en) * | 2018-02-27 | 2018-07-13 | 安徽盛运重工机械有限责任公司 | The one-pass molding of steel elbow makes tooling |
| CN109093330A (en) * | 2018-08-27 | 2018-12-28 | 广东思豪内高压科技有限公司 | A kind of water swelling moulding process of silencer for automobile |
| CN109093330B (en) * | 2018-08-27 | 2021-09-03 | 广东思豪内高压科技有限公司 | Water expansion forming process of automobile silencer |
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Application publication date: 20171020 |