CN1473671A - Method for producing pure copper high precision semi hollow section bar - Google Patents
Method for producing pure copper high precision semi hollow section bar Download PDFInfo
- Publication number
- CN1473671A CN1473671A CNA031293662A CN03129366A CN1473671A CN 1473671 A CN1473671 A CN 1473671A CN A031293662 A CNA031293662 A CN A031293662A CN 03129366 A CN03129366 A CN 03129366A CN 1473671 A CN1473671 A CN 1473671A
- Authority
- CN
- China
- Prior art keywords
- die
- section bar
- fine copper
- hollow section
- tongue
- 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
Abstract
The production process of high precision semi-hollow pure copper section bar includes extruding V-shaped blank in V-shaped hot extruding mold at about 850 deg.c and cold drawing in combined mold with locating slot and core rod having hem. The V-shaped hot extruding mold has opening larger than that required in producing C-shaped section bar, and the combined mold is combined structure of separated core mold and outer mold with hem to make the blank enter to the mold cavity smoothly for homogeneous deformation. The drawn head is forged into size smaller than the aperture of the outer mold for penetrating through and is clamped with a clamp for drawing out to obtain finished product. The said method can produce section bar with precise and stable size and high strength in high yield.
Description
Affiliated technical field
The present invention relates to the manufacture method of fine copper high accuracy semi-hollow section bar, particularly produce the manufacture method of fine copper high accuracy electrician, belong to metal processing, manufacturing technology field with the semi-hollow section bar with single action extrusion process, cored bar drawing process.
Background technology
Fine copper has the only good electric conductivity of second son silver, and crystal is face-centered cubic, has good cold and hot plastic deformation ability; And stacking fault energy is lower, and dislocation expansion is easily accumulated, and work hardening rate is big, and the mechanical performance of goods is controlled easily.The chemical property of fine copper is stable, is not corroded substantially in atmosphere, water, steam; The fine copper surface also can generate compact protective film in marine climate, and corrosion rate is little.These peculiar properties are that the major reason that purposes is wide is day by day constantly risen in present electric utility to fine copper goods demand.
Because these peculiar properties of above-mentioned fine copper, fine copper section bar, particularly fine copper semi-hollow section bar become a kind of novel electrical material that electric utility in recent years is extensive use of, promotes.Because fine copper semi-hollow section bar particular structure, no matter in electric property, radiating effect, aspects such as rigidity and convenient use all are better than traditional rectangular bus bar greatly, begun to replace rectangular bus bar in American-European advanced industrial country, as be used for high-power high-accuracy high reliability electricity cabinet C type bus rod (see figure 1), be used for the fork-shaped copper material (see figure 2) of large-sized water turbine generator terminals and be used for the H shape wiping lead (see figure 3) of safe wiping lead.China at present only foreign capitals, joint venture begin to quote, fine copper semi-hollow section bar is based on import.
The semi-hollow section bar is the Metal Forming industry is surrounded the tubulose section bar of big hollow section with smaller opening to a class a general designation.
Can adopt following method to prepare the semi-hollow section bar at present:
Thin to some wall thickness and equate semi-hollow section bar can dull and stereotyped rolling or flanging moulding; The light metal of and solution strengthening good to other high temperature seam or copper alloy also can tape welding close combination die moulding on extruder of chamber.
But with fine copper semi-hollow section bar, because of its wall thickness is thicker, even wall thickness do not wait for the electrician that the present invention relates to, and the higher (σ of fine copper elevated temperature strength
b850 ℃ 〉=2Nf/mm), and seam is bad, so can't adopt said method production.
The method of at present known production fine copper semi-hollow section bar has:
(1) is mother metal with high accuracy heavy wall copper pipe, cuts processing through gold and obtain finished product; But that this method can only be produced is short, etc. the section bar of wall thickness, and tolerance is bigger, can't produce section bar different wall or rectangular.
(2) on double-acting extruding machine, produce blank, obtain finished product through cold stretch again with locking pin.The thumping majority double-acting extruding machine adopts servo-actuated pin explained hereafter copper pipe at present, that is: after plug (pin) perforation, move with extrusion axis and ingot casting when extruding, and is not high to the requirement of strength of pin.And after locking pin extruding was plug (pin) perforation, when extruding, plug (pin) was fixed on certain position, with ingot casting a kind of special producing technology of relative motion is arranged; This technology is very high to the requirement of strength of equipment precision and plug (pin), and only few manufacturer can grasp use.More than the characteristics of these two kinds of methods be: producing cost height, efficient are low, and because the unsteady product precision that makes of pecker is difficult to be guaranteed, lumber recovery is low.As the lumber recovery of C type bus only about 50%, make product price very expensive.So although fine copper semi-hollow section bar has many premium properties, be subjected to designer's favor as a kind of desirable electrical material, only be used for some important events, and fail to be widely used.
Summary of the invention
The shortcoming that above-mentioned production fine copper semi-hollow section bar method producing cost height, efficient are low in order to overcome, the product precision is difficult to be guaranteed, lumber recovery is low, the invention provides a kind of manufacture method of improved fine copper semi-hollow section bar, particularly fine copper high accuracy electrician uses the manufacture method of semi-hollow section bar.According to method provided by the invention, solved the production technology difficult problem of present existence by changing mould structure, make the electrician can resemble the extruding of being convenient to the common solid profile with the preparation of fine copper semi-hollow section bar, the orthicon material is such is convenient to stretch, and precision is much higher than tubing again.
Fine copper high accuracy electrician provided by the invention uses the manufacture method of semi-hollow section bar, comprise hot extrusion operation, cored bar cold stretch operation and straightening, shaping subsequent handling, effectively utilize intrinsic good cold and hot plastic deformation ability of fine copper and goods thereof will reach the characteristic of the working strength of setting with certain cold working rate, give full play to the flow scope of its process, also solved the strength problem of mould simultaneously.
Be example with typical semi-hollow section bar-C type bus rod (hereinafter to be referred as the C section bar) now, its manufacture method is described as follows:
1, preparation increases the hot extrusion operation of the V-type blank of opening
The present invention changes the conventional similar figures method for designing of using of extrusion die, adopts and draws back mould openings (promptly increasing root of the tongue cross section), makes the die cavity section of mould be deformed into V-type by the C type.Thereby guaranteed the working strength of mould; Set up the holder of tongue pattern simultaneously, the further effectively strain during the control mold work, and determine the allowance at mould tongue position in view of the above.Can obtain the blank of dimensionally stable with the die extrusion process.
2, cored bar cold stretch operation
The V-type blank deformation becomes the cold stretch of C type semi-hollow section bar, adopts the cold drawn combination die of wiredrawn edge that locating slot, cored bar are arranged.Because the intensity of pull bar far above the bending resistance of fixed die root of the tongue connecting portion, has been avoided the unstable fracture of ligulate core; Locating slot can guarantee the position of related features of goods opening, and the fit tolerance of key on itself and the core can be avoided again because of extruding the problem that stretcher strain inequality that the product tolerance causes is brought; The wiredrawn edge design of cold drawn combination die can make blank enter die cavity smoothly, guarantees that distortion evenly.Another feature of cold drawn combination die design is: make goods can serve as a contrast core easily as common tubing and stretch, and needn't consider that profile shapes wears difficulty that the die drawing peak with heading is made and the restriction that is subjected to pass reduction because of mould strength.
In order to correct the issuable bending of the later half hollow profile of cold stretch, should use the stretching-machine of adjustable die holder to stretch, realize online straightening.
3, alignment, shaping subsequent handling
The slight bending of the later half hollow profile goods of cold stretch can and be equipped with the cam-type hand in the hydraulic straightening machine alignment and pull slot expansion device, carries out shaping.Can reach the dimensional accuracy of product requirement so easily.
Method provided by the invention adopts the innovation thinking different with current technology, has solved the production difficult problem of fine copper high accuracy electrician with the semi-hollow section bar with simple and direct method, provides one to overlap complete and simple production technology greatly reduces the requirement of product to equipment.Method design concept novelty of the present invention, method practicality are generally managed excellent type copper processing enterprise and can be utilized existing weaponry and equipment to produce fine copper semi-hollow section bar with this method fully.When reducing the production cost significantly, obtain high-quality product.This promoting the use of of fine copper semi-hollow section bar to high comprehensive performance has positive effect and great social benefit, has significant practicality.
The fine copper high accuracy electrician who uses the inventive method to produce use the semi-hollow section bar, and dimensional accuracy height and stablizing can be produced precision by general skilled worker at common extruder and be higher than the goods of senior double action extruder with the locking pin explained hereafter.Can reach more than 72% by the finished product rate of ingot casting, be higher than the level of the at present general lumber recovery 50% of this based article, and can obtain the big σ of intensity to finished product
b〉=300N/mm
2Fine copper semi-hollow section bar.
Description of drawings
Below in conjunction with drawings and Examples the inventive method is described further, but and the scope of application of unrestricted the inventive method.
Fig. 1 is a C section bar sectional view;
Fig. 2 is a fork-shaped copper material sectional view;
Fig. 3 is H shape wiping conductor cross-section figure;
Fig. 4 is V-type hot extruding die (die cavity part) and A-A profile thereof;
Fig. 5 is tongue pattern holder (die cavity part) and B-B profile thereof;
Fig. 6 is cold drawn combination die and C-C profile thereof;
Fig. 7 is a cored bar cold stretch process schematic representation;
Fig. 8 is a hydraulic straightening machine work schematic diagram;
Fig. 9 is that the cam-type hand is pulled slot expansion device work schematic diagram.
Among Fig. 1, (1) is the opening (being equivalent to the mould root of the tongue) of C section bar, the inner chamber (tongue that is equivalent to mould) of (2) C section bar, the cross section (being equivalent to mold cavity) that (3) are the C section bar.
Among Fig. 4, (32) be V-type hot extruding die, (4) be V-type hot extruding die die cavity, (5) be dowel hole, (6) be the root of the tongue, (7) be area that tongue, tongue are enclosed to the root of the tongue (6) be A, (8) be prostomum, (9) are that calibrating strap, (10) they are the sections of root of the tongue width, its area is W;
Among Fig. 5, (33) are that the holder of tongue pattern, (11) are tongue pattern holder die cavities.
Among Fig. 6, (12) are that core, (13) are that die orifice wiredrawn edge, (14) are that external mold, (15) are that locating slot, (16) are key (dotted portions).
Among Fig. 7, (17) are that pull bar, (18) are that stretching head, (19) are that clamp, (20) are that blank, (21) are finished products.
Among Fig. 8, (22) are that hydraulic cylinder, (23) are that top, (24) are to treat that alignment workpiece, (25) are that cushion block, (26) are rulers.
Among Fig. 9, (27) are to treat that shaping workpiece, (28) are that open slot, (29) are that cam, (30) are that spanner, (31) are backplates.
The smaller opening of C section bar (1) is equivalent to the mould root of the tongue, and C section bar cross section (3) is equivalent to mold cavity, C Section bar inner chamber (2) is equivalent to the tongue of mould. As conduction and supporting material, require the conductance of C section bar 〉=96.5%IACS (is 56m/ Ω mm2), intensity σb≥250N/mm
2, flexibility≤1.5/1000, wall thickness Tolerance≤2.5%. This shows that when mold work, it is formed that the littler root of the tongue can't bear the large tracts of land tongue Moment of flexure and being out of shape is the main cause of pinch or the failure that stretches. Accordingly, this technology is in the hot extrusion operation, Employing meets the electrician with the ingot casting of fine copper quality standard, is heated to about 850 ℃, in the extruding with the water seal outlet Machine (single action, two moving all can) on, push with the section bar of V-type hot extruding die (32) (seeing Fig. 4) with routine Explained hereafter. Owing to pulled open extended distance, made the die cavity of mould become V-type by the C type, in tongue (7) In the situation that area A slightly increases, increased considerably the area W of the section (10) of root of the tongue width, like this Just greatly increased the bending resistance of mould. Through actual measurement and the fine copper semi-hollow profile in the similar cross section of this case 850 About ℃ the extruding, when the hot die steel extrusion die thickness of 3Cr2W8V or Y4 class is 45mm, its by The ratio of the area w of the area A that the tongue of mould encloses to the root of the tongue (6) and the section (10) of root of the tongue width less than 1.4, just can realize smoothly extruding.
V-type hot extruding die (32) is connected by dowel hole (5) and tongue pattern holder (33) location.
Go out prostomum (8) and be used for reducing crush resistance, the protection extruded product is not scratched.
Calibrating strap (9) is used for determining the size of extruded product, and its width is generally about 10mm.
Set up tongue pattern holder (33) (claiming again bed die), the generation in the time of then can further reducing hot extruding die work Strain makes the extrusion billet size keep stable. Just in hot extrusion, should being permitted according to mold materials Use intensity, manage to become working strength less than the routine of working strength the mold cavity Section Design of semi-hollow profile The section bar type cavity mould. So not only simplified the making of mould, also reduced the operation requirements to extruding, avoided When pushing with locking pin to the high request of equipment concentricity. Adopt whole flat-die (claiming again die), make operation The workman can in time revise mould easily according to pressing surplus band to stay the size of section bar, effectively controls the chi of extruded product Very little tolerance. Owing to the chilling oxygen barrier effect of water seal, can obtain any surface finish, have the fine isometric crystal grains group simultaneously Knit the blank that cold plasticity is good.
Fine copper is annealed condition after hot-working, intensity is very low, can only lean on cold moulding processing to improve intensity. To C Section bar 〉=250N/mm2Requirement of strength. Then need the cold working rate about 20%, and cold drawn combination die (is seen Cavity dimension Fig. 6) is exactly the sectional dimension of product. For the C section bar: can not be more in a similar manner The mould root is pulled open. Therefore the pressure that is produced by stretcher strain will produce at the tongue of drawing-die very big curved Square is enough to destroy tiny root of the tongue section; The V-type extruded product can not pass C pattern chamber simultaneously.
Method of the present invention is with the tongue in core (12) the replacement drawing-die of band pull bar (17), and pull bar (17) is anti-Tensile strength is higher than the bending resistance of the littler root of the tongue far away, and pull bar (17) longitudinal register is also very stable, therefore also Needn't consider that the core print constant intensity is to the restriction of product pass reduction. The root of the tongue also develops into the key on the core thus (16), the locating slot (15) that cooperates with key (16) can guarantee again the deviation of aperture position, and its fit tolerance then Can reduce the adverse effect of extrusion billet tolerance to stretching. The wiredrawn edge design (13) of die orifice has increased blank and has entered The deformation range of die cavity makes the V-type blank be out of shape in no working modulus, in the situation of seldom gaining in strength, and can Enter smoothly C type distortion shaping die cavity (seeing Fig. 7).
Because the combining structure that has adopted core (12) to separate with external mold (14), stretching head (18) is as long as be swaged into little In the external mold aperture, can pass nib, core also can (be seen Fig. 7) in trombone slide enters the C section bar easily, And needn't be very difficultly make the stretching leader of profile shapes in modes such as millings.
Clamp (19) is clamped stretching head (18), and blank (20) is extracted cold drawn combination die, obtains finished product (21).
The semi-hollow profile that obtains by cold drawn combination die vertically has good rigidity, and maintenance is caused because of opening in the cross section Power is relatively poor. So if any bigger bending, be difficult to correct by subsequent handling after the cold stretch. So should adopt online accent Directly, should use the stretching-machine of adjustable die holder to stretch, straightening is carried out in bigger bending to semi-hollow profile at any time.
Cold drawn combination die is because complex-shaped, and working strength is big and uneven, and its material should adopt the high-alloy cold mould The tool steel is done.
To the slight bending of semi-hollow profile, can be at hydraulic straightening machine alignment (seeing Fig. 8). To treat the alignment workpiece (24) be positioned on the ruler (26) by cushion block (25), drive top (23) in midair with hydraulic cylinder (22) Heart section bar carries out alignment.
If need, can pull slot expansion device with the cam-type hand semi-hollow profile is carried out shaping (seeing Fig. 9). Will Put into the open slot (28) for the treatment of shaping workpiece (27) with the cam (29) of spanner (30), pull spanner (30) Cam (29) is rotated, and the size of adjusting open slot (28) makes the dimensional accuracy that reaches product requirement. Backplate (31) effect is that shaping workpiece (27) is treated in protection.
The specific embodiment
Embodiment 1,
A kind of manufacture method of fine copper high accuracy semi-hollow section bar comprises following operation:
1, preparation increases the hot extrusion operation of the V-type blank of opening
To meet the electrician and be heated to about 850 ℃ with the ingot casting of fine copper quality standard, the extruder of band water seal outlet (single action, two moving all can) on, produce with the section bar extrusion process of routine with V-type hot extruding die (32).The die cavity of V-type hot extruding die (32) is a V-type, the opening that its opening requires greater than the C section bar.The ratio of the area W of the area A that it is enclosed to the root of the tongue (6) by the tongue of mould and the section (10) of root of the tongue width is less than 1.4.
V-type hot extruding die (32) fuses by dowel hole (5) and tongue pattern holder (33) location.
Go out prostomum (8) and be used to reduce crush resistance, the protection extruded product is not scratched.
Calibrating strap (9) is used for determining the size of extruded product, and its width is generally about 10mm.
V-type hot extruding die (32) is provided with tongue pattern holder (33), the strain when tongue pattern holder (33) can further effectively be controlled mold work, and the thickness of tongue pattern holder (33) is about 65mm.Can obtain the V-type blank of dimensionally stable with the die extrusion process.
2, cored bar cold stretch operation
The V-type blank deformation becomes the cold stretch of C type semi-hollow section bar, adopts the cold drawn combination die of wiredrawn edge that the locating slot cored bar is arranged.The combining structure that cold drawn combination die adopts core (12) to separate with external mold (14), die orifice has die orifice wiredrawn edge (13), can make blank enter die cavity smoothly, guarantees that distortion evenly.
Core (12) band pull bar (17) replaces the tongue in the drawing-die, and core (12) is put into the C section bar; Key on the core (16) is positioned external mold (14) by locating slot (15).
Stretching head (18) is swaged into less than the external mold aperture, passes nib; Clamp (19) is clamped stretching head (18), and blank (20) is extracted cold drawn combination die, obtains finished product (21).
3, alignment, shaping subsequent handling
The slight bending of double hollow profile can be in hydraulic straightening machine alignment (see figure 8).To treat that alignment workpiece (24) is positioned on the ruler (26) by cushion block (25), and drive top (23) double hollow profile with hydraulic cylinder (22) and carry out alignment.
If desired, can pull double hollow profile of slot expansion device with the cam-type hand and carry out the shaping (see figure 9).The cam (29) that will have spanner (30) is put into the open slot (28) for the treatment of shaping workpiece (27), pulls spanner (30) cam (29) is rotated, and the size of adjusting open slot (28) makes the dimensional accuracy that reaches product requirement.
Embodiment 2,
As the manufacture method of a kind of fine copper high accuracy semi-hollow section bar of embodiment 1, but use the stretching-machine of adjustable die holder to stretch, straightening is carried out in double bigger bending of hollow profile at any time.
Embodiment 3,
As the manufacture method of a kind of fine copper high accuracy semi-hollow section bar of embodiment 1,2, but cold drawn combination die adopts cold work die steel in high alloy through to make.
Embodiment 4,
As the manufacture method of a kind of fine copper high accuracy semi-hollow section bar of embodiment 1,2,3, fine copper conductance 〉=96.5%IACS (is 56m/ Ω mm
2), intensity σ
b〉=250N/mm
2, flexibility≤1.5/1000, wall thickness tolerance≤2.5%.
Claims (7)
1, the manufacture method of fine copper high accuracy semi-hollow section bar comprises hot extrusion, cold stretch operation, it is characterized in that the hot extrusion operation be in band water seal outlet extruder (single action, two moving all can) on, use V-type hot extruding die (32) to carry out;
The die cavity of V-type hot extruding die (32) is a V-type, the opening that its opening requires greater than the C section bar; The ratio of the area W of the area A of being enclosed to the root of the tongue (6) by the tongue of mould and the section (10) of root of the tongue width is less than 1.4;
V-type hot extruding die (32) is provided with tongue pattern holder (33), and V-type hot extruding die (32) fuses by dowel hole (5) and tongue pattern holder (33) location;
With after the ingot casting heating, make the V-type blank with the die extrusion process of routine;
The cold stretch operation adopts has the cold drawn combination die of wiredrawn edge of locating slot cored bar to carry out;
The combining structure that cold drawn combination die adopts core (12) to separate with external mold (14), die orifice has die orifice wiredrawn edge (13); Core (12) band pull bar (17), core (12) is put into the C section bar; Key on the core (16) is positioned external mold (14) by locating slot (15);
The stretching head (18) of V-type blank is swaged into less than the external mold aperture, passes nib; Clamp (19) is clamped stretching head (18), and blank (20) is extracted cold drawn combination die, obtains finished product (21).
2, the manufacture method of fine copper high accuracy semi-hollow section bar according to claim 1 is characterized in that this method also comprises described finished product (21) in the hydraulic straightening machine alignment with pull slot expansion device with the cam-type hand and carry out shaping;
Finished product (21) is to treat that alignment workpiece (24) is positioned on the ruler (26) by cushion block (25) when the hydraulic straightening machine alignment, drives top (23) alignment with hydraulic cylinder (22);
When pulling slot expansion device and carry out shaping, be that the cam (29) that will have spanner (30) is put into the open slot (28) for the treatment of shaping workpiece (27), pull spanner (30) cam (29) is rotated, adjust the size of open slot (28) with the cam-type hand.
3,, it is characterized in that the cold stretch operation uses the stretching-machine of adjustable die holder according to the manufacture method of claim 1,2 described fine copper high accuracy semi-hollow section bars.
4,, it is characterized in that cold drawn combination die adopts cold work die steel in high alloy through to make according to the manufacture method of claim 1,2 described fine copper high accuracy semi-hollow section bars.
5, the manufacture method of fine copper high accuracy semi-hollow section bar according to claim 3 is characterized in that cold drawn combination die adopts cold work die steel in high alloy through to make.
6, the manufacture method of fine copper high accuracy semi-hollow section bar according to claim 4 is characterized in that fine copper conductance 〉=96.5%IACS (is 56m/ Ω mm
2), intensity σ
b〉=250N/mm
2, flexibility≤1.5/1000, wall thickness tolerance≤2.5%.
7, the manufacture method of fine copper high accuracy semi-hollow section bar according to claim 5 is characterized in that fine copper conductance 96.5%IACS (is 56m/ Ω mm
2), intensity σ
b〉=250N/mm
2, flexibility≤1.5/1000, wall thickness tolerance≤2.5%.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031293662A CN1473671A (en) | 2003-06-18 | 2003-06-18 | Method for producing pure copper high precision semi hollow section bar |
| CN 200410017254 CN1273232C (en) | 2003-06-18 | 2004-03-29 | Method for producing modified half-hollw section of pure copper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031293662A CN1473671A (en) | 2003-06-18 | 2003-06-18 | Method for producing pure copper high precision semi hollow section bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1473671A true CN1473671A (en) | 2004-02-11 |
Family
ID=34153497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031293662A Pending CN1473671A (en) | 2003-06-18 | 2003-06-18 | Method for producing pure copper high precision semi hollow section bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1473671A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102366766A (en) * | 2011-10-21 | 2012-03-07 | 白银有色集团股份有限公司 | Hot extrusion mold for producing profile for electrified high-speed railway feedback line clamps |
| CN102820437A (en) * | 2012-08-16 | 2012-12-12 | 绥中正国新能源科技有限公司 | Manufacturing method of lithium battery shell |
| CN102941238A (en) * | 2012-11-01 | 2013-02-27 | 上海智溢金属材料有限公司 | Mold for manufacturing copper H-form sliding contact line and method thereof |
| CN104668892A (en) * | 2013-12-02 | 2015-06-03 | 江西昌河航空工业有限公司 | Shell nosing machining technology method for pull rod of helicopter |
| CN105478506A (en) * | 2015-12-18 | 2016-04-13 | 西南铝业（集团）有限责任公司 | Manufacturing method of asymmetric triangular hollow profile |
| CN106064203A (en) * | 2016-05-31 | 2016-11-02 | 宁波德创复冷机械有限公司 | Produce the method for king's word steel barb and the mould of use thereof |
-
2003
- 2003-06-18 CN CNA031293662A patent/CN1473671A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102366766A (en) * | 2011-10-21 | 2012-03-07 | 白银有色集团股份有限公司 | Hot extrusion mold for producing profile for electrified high-speed railway feedback line clamps |
| CN102820437A (en) * | 2012-08-16 | 2012-12-12 | 绥中正国新能源科技有限公司 | Manufacturing method of lithium battery shell |
| CN102820437B (en) * | 2012-08-16 | 2015-02-25 | 绥中正国新能源科技有限公司 | Manufacturing method of lithium battery shell |
| CN102941238A (en) * | 2012-11-01 | 2013-02-27 | 上海智溢金属材料有限公司 | Mold for manufacturing copper H-form sliding contact line and method thereof |
| CN104668892A (en) * | 2013-12-02 | 2015-06-03 | 江西昌河航空工业有限公司 | Shell nosing machining technology method for pull rod of helicopter |
| CN105478506A (en) * | 2015-12-18 | 2016-04-13 | 西南铝业（集团）有限责任公司 | Manufacturing method of asymmetric triangular hollow profile |
| CN106064203A (en) * | 2016-05-31 | 2016-11-02 | 宁波德创复冷机械有限公司 | Produce the method for king's word steel barb and the mould of use thereof |
| CN106064203B (en) * | 2016-05-31 | 2019-03-12 | 宁波善丹梅食品有限公司 | The mold for producing the method for king's word steel barb and its using |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108637031B (en) | mould for preparing high-performance magnesium alloy pipe | |
| CN102974646B (en) | Manufacturing process of aluminum alloy water-drop-shaped thin-wall tubular material | |
| CN105397086B (en) | A kind of titanium alloy hollow blade laser accurate manufacturing process | |
| CN1473671A (en) | Method for producing pure copper high precision semi hollow section bar | |
| CN105690045A (en) | Method for producing flat bulb steel | |
| CN209502590U (en) | A kind of metal alloy compositions extrusion molding dies | |
| CN101219443A (en) | Production of high-accuracy special-shaped copper strip with continuous extrusion process | |
| CN103658213B (en) | A kind of extruding new method of highly-efficient processing straight spur gear | |
| CN103599955B (en) | It is a kind of for alloy state for 6061FT6 Large Flat width thin-wall section mould structure | |
| CN102896174B (en) | The electrolysis preparation technology of the hollow conductive plate of continuously extruded abnormal shape | |
| CN102416558A (en) | Preparation method particularly suitable for cold-bending plastic formation of aluminum alloy extrusion member | |
| CN101722204A (en) | Extrusion process for titanium alloy profile material | |
| CN110993190A (en) | Contact wire and preparation method and application thereof | |
| CN103753150B (en) | A kind of preparation method of magnesium alloy honeycomb blind hole structural member | |
| CN1273232C (en) | Method for producing modified half-hollw section of pure copper | |
| CN108262360B (en) | Annular hole type rolling hollow section bar preparation device | |
| CN106513479B (en) | A kind of bending machining process of turbo blade | |
| CN203875214U (en) | Water tunnel or wind tunnel cellular board forming composite die | |
| CN205393195U (en) | Two flourishing spindle section of thick bamboo extruders | |
| CN1817503A (en) | Precisioning forging method of crawler belt plate | |
| CN110293142B (en) | Die for copper alloy semi-solid extrusion pipe | |
| CN210936483U (en) | High-speed high-precision fine line production equipment | |
| CN106001144B (en) | For producing the mold and equipment and application method of long spline | |
| CN1864918A (en) | Technique for processing tapered platinum alloy discharge spout | |
| CN114472575B (en) | Multidirectional hot extrusion forming die and forming method for light saddle-shaped end frame structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |