CN101786126A - Manufacturing method of thin-wall metal cylinder body - Google Patents
Manufacturing method of thin-wall metal cylinder body Download PDFInfo
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Abstract
The invention discloses a manufacturing method of a thin-wall metal cylinder body. The method comprises the following steps of: (1) processing a metal plate into a cylindrical plain pipe; (2) sleeving the cylindrical plain pipe on a mandrel of rotating and pressing processing equipment to carry out rotating and pressing processing to obtain a primary thin-wall metal cylinder body; (3) carrying out differential temperature drawing and smoothing processing on the primary thin-wall metal cylinder body obtained in the step (2) to prepare a pipe unit with a main body thickness below 0.1mm; and (4) cutting off both ends of the pipe unit subjected to the drawing and smoothing processing and retaining a middle pipe body to finally prepare the thin-wall metal cylinder body. The invention has the advantages that a thin-wall metal cylinder prefabricated product is firstly produced by utilizing the rotating and pressing processing, and then spiral fringes on the surface of the thin-wall metal cylinder are removed by utilizing the differential temperature drawing and smoothing processing process; meanwhile, the straightness and the wall thickness of the product can be renewedly revised; and in the differential temperature drawing and smoothing process, the mandrel is cooled, and a smoothing stamp die is heated, which can effectively suppress the martensite phase transformation caused by the smoothing and improve the plasticity of metal materials.
Description
Technical field:
The present invention relates to a kind of manufacture method of thin-wall metal cylinder body.
Background technology:
Usually, as the roller of blooming manufacturing, nano impression, big miniature electric imaging formula printer usefulness, high accuracy printing, use wall thickness is polystyrene film, the polyimide film manufacturing of 0.03～0.3mm scope more.Also have in addition, in nickel plating, electroplate, adopt from parent and extract the nickel electrocasting making of having separated out the electroform products of nickel metal at the cylindrical shape parent out.
The roller of such use, because in the operation of processing such as heating continuously, pressurize, cool off, peel off, use, thus wish to have good heat conductivity, hear resistance, in addition, because of using, so also need outstanding fatigue strength, rigidity as rotary body.
But if the resin material that adopts polystyrene, polyimides one class is during as roll body, the heat conductivity of roll body is poor, and adopts the nickel electoformed product as roll body, though its heat conductivity is outstanding, can cause thermal embrittlement under the temperature more than 200 ℃.So in the PRN device industry, the roll body that adopts above-mentioned two kinds of materials to make is withdrawn from the market gradually, the substitute is the roll body that adopts thin-wall metal cylinder body to make.
And for thin-wall metal cylinder body, traditional processing method is to adopt rotary pressing processing, in the rotary pressing processing, the clad material of aluminium, stainless steel, nickel, titanium, copper or stainless steel and copper etc. is carried out plastic working as material, adopt this thin-wall metal cylinder body to can be made into the roller that performance has the outstanding hot spiral property led of metal, hear resistance, fatigue strength, rigidity.But still there is significant disadvantages in this processing method, the thin-wall metal cylinder body that makes through rotary pressing processing can produce a large amount of barber-pole stripes in its surface, have a strong impact on the surface smoothness of thin-wall metal cylinder body, the product of this quality does not meet the high surface smoothness requirement of PRN device.And for processing thickness had only cylinder below the 0.1mm, the linearity of the product that processes was relatively poor, and wall unevenness is even.
Summary of the invention:
The objective of the invention is provides a kind of manufacture method of producing high-quality thin-wall metal cylinder body in order to overcome the shortcoming of above-mentioned prior art.
For achieving the above object, technical scheme provided by the invention is: the manufacture method of thin-wall metal cylinder body comprises following processing step:
1. sheet metal is processed into cylindric plain pipe;
2. with cylindric plain pipe box on the mandrel of rotary pressing processing equipment, carry out rotary pressing processing and obtain elementary thin-wall metal cylinder body;
3. the elementary thin-wall metal cylinder body that 2. step is obtained carries out differential temperature and stretches and to smooth out with the fingers processing, and making body thickness is the following pipe fitting of 0.1mm;
4. pipe fitting two tip cut-offs after smoothing out with the fingers processing through differential temperature, keep the middle part body, finally make required thin-wall metal cylinder body.
When rotary pressing processing, in the time of spinning workpiece is imposed axial tensile force.
The differential temperature stretching is smoothed out with the fingers processing steps and is: the drift that elementary thin-wall metal cylinder body is housed is compressed into punch die once, and the process of compressing into is cooled off drift simultaneously, heats smoothing out with the fingers the processing punch die.
The drift chilling temperature is controlled at-7 ℃～20 ℃, to smooth out with the fingers processing punch die heating and temperature control at 70 ℃～200 ℃.
The process velocity that drift is compressed into punch die is 10～1000mm/ second.
After adopting technique scheme, utilize rotary pressing processing to produce thin-wall metal cylinder prefabrication earlier, utilize differential temperature to stretch again and smooth out with the fingers processing technology, the lip-deep barber-pole stripes of thin-wall metal cylinder body is removed, can be revised the linearity of product and wall thickness again simultaneously, differential temperature stretches and smoothes out with the fingers process, drift is cooled off, heat smoothing out with the fingers the processing punch die, can effectively suppress to improve the plasticity of metal material because of smoothing out with the fingers the martensite phase transformation that processing causes.
Description of drawings:
Figure 1A is one of rotary pressing processing equipment structure chart of the present invention;
Figure 1B is two of rotary pressing processing equipment structure chart of the present invention;
Fig. 2 A is three of rotary pressing processing equipment structure chart of the present invention;
Fig. 2 B is four of rotary pressing processing equipment structure chart of the present invention;
Fig. 3 A is five of rotary pressing processing equipment structure chart of the present invention;
Fig. 3 B is six of rotary pressing processing equipment structure chart of the present invention;
Fig. 3 C is seven of rotary pressing processing equipment structure chart of the present invention;
Fig. 3 D is eight of rotary pressing processing equipment structure chart of the present invention;
Fig. 4 is nine of rotary pressing processing equipment structure chart of the present invention;
Fig. 5 smoothes out with the fingers the structure chart of processing mold for tradition stretches again;
Fig. 6 is mechanical performance and the temperature dependent graph of a relation of test material SUS304;
Fig. 7 is the anisotropic graph of a relation of temperature and 0.2% endurance;
Fig. 8 is the schematic diagram of elementary stretch forming product wall thickness measuring position;
Fig. 9 is the elementary stretch forming product Thickness Distribution schematic diagram of corresponding measuring position shown in Figure 4;
Figure 10 has lured the schematic diagram of martensite variable for each sample processing of corresponding measuring position shown in Figure 4;
Figure 11 is for extensibility again is 60%, elementary extensibility is respectively 2.6 and 2.0 Thickness Distribution contrast figure;
Figure 12 is for extensibility again is 55%, elementary extensibility is respectively 2.6 and 2.0 Thickness Distribution contrast figure;
The processing that Figure 13 does after the annealing in process for elementary drawing and forming product has lured martensitic phase variable schematic diagram;
Figure 14 material is smoothed out with the fingers the schematic diagram of processing the martensitic phase variable that has lured because of stretching again;
Figure 15 is the graph of a relation of interior differential temperature pull and stretch processing temperature of high temperature range and stress.
The specific embodiment:
The manufacture method of the thin-wall metal cylinder body of present embodiment comprises following processing step:
1. utilize the mode of punching press or welding that sheet metal is processed into the cylindric plain pipe of cap shape;
2. with cylindric plain pipe box on the mandrel of rotary pressing processing equipment, carry out rotary pressing processing and obtain elementary thin-wall metal cylinder body, when rotary pressing processing, in the time of spinning workpiece is imposed axial tensile force;
3. the elementary thin-wall metal cylinder body that 2. step is obtained carries out differential temperature and stretches and to smooth out with the fingers processing, and the drift that elementary thin-wall metal cylinder body is housed is compressed into punch die once, and the process of compressing into is cooled off drift simultaneously, processes punch die and heats smoothing out with the fingers.The drift chilling temperature is controlled at-7 ℃～20 ℃, the heating and temperature control of smoothing out with the fingers the processing punch die at 70 ℃～200 ℃, is made body thickness and be the following pipe fitting of 0.1mm;
4. pipe fitting two tip cut-offs after smoothing out with the fingers processing through differential temperature, keep the middle part body, finally make required thin-wall metal cylinder body.
Attention: the process velocity that drift is compressed into punch die is 10～1000mm/sec.Smoothing out with the fingers processing thickness is the following stainless steel cylinder of 0.1mm, and in the time of processing and forming, process velocity carries out comparatively suitable in the scope of 10～1000mm/sec.Process velocity surpasses 1000mm/sec, and the lubricant of supplying with drum surface is pure, toasts easily.In addition, the not enough 10mm/sec of process velocity owing to add the influence of the vibration of the mold in man-hour and punch press, be out of shape inhomogeneous, the axial thickness of the cylinder inequality that becomes.
Introduce rotary pressing processing technology and differential temperature process technology below in detail.
One, rotary pressing processing technology
Here the method and apparatus of rotary pressing processing has following example:
Fig. 1 (A) is expressed as the consistent situation of bearing of trend that moves axially direction and cylindric plain pipe 30 of spinning parts 20.The marginal ridge shape is processed in the plain Guan Yiduan of cylinder 31 outsides, the edge shape is processed in the other end 32 inboards, the cylindric plain pipe 30 of suit on mandrel 10, one end 32 of inboard one-tenth edge shape is fixed, end with the first support rotary part, 41 support mandrel 10, the other end with the second support rotary part, 42 support mandrel 10, mandrel 10 is by rotating with the two end supports state, reach the purpose that prevents mandrel 10 centrifugal rotations, end 31 at cylindric plain pipe outside marginal ridge shape is provided with tension force optional feature 50, bestow the consistent tension force of bearing of trend with cylindric plain pipe 30 for cylindric plain pipe 30, realize efficient moulding evenness of wall thickness, linearity, the thin-wall metal cylinder body that cylindricity is outstanding.In addition, black arrow represents to bestow the direction of cylindric plain pipe 30 tension force among the figure, and white arrow is represented the moving direction of spinning parts 20.The periphery of the plain pipe 30 of spinning parts 20 corresponding circle tubulars is with three of 120 arranged spaced of spending.
It is straight-tube shape that Fig. 1 (B) is expressed as cylindric plain pipe 30 inwalls, the opposite situation of bearing of trend that moves axially direction and cylindric plain pipe 30 of spinning parts 20.The cylindric plain pipe 30 of suit on mandrel 10, end with the first support rotary part, 41 support mandrel 10, the other end with the second support rotary part, 42 support mandrel 10, mandrel 10 is by rotating with the two end supports state, reach the purpose that prevents mandrel 10 centrifugal rotations, cylindric plain pipe 30 is processed into the marginal ridge shape near first end 31 outsides of supporting rotary part 41, end 31 at cylindric plain pipe cap edge shape is provided with tension force optional feature 50, bestow the tension force that supports rotary part 41 directions towards first for cylindric plain pipe 30, the moving direction of spinning parts 20 is with to bestow cylindric plain 30 tension directions of managing opposite.Black arrow represents to bestow the direction of cylindric plain pipe 30 tension force among the figure, and white arrow is represented the moving direction of spinning parts 20.
Fig. 2 (A) compares with Fig. 1 (B), cylindric plain pipe 30 inwalls also are straight-tube shapes, do not design medial margin, just the cylindric plain management and control member made 15 of an end 31 usefulness of cylindric plain pipe cap edge is fixed, mandrel 10 usefulness first support an end of rotary part 41 support mandrel 10, and with the other end of the second support rotary part, 42 support mandrel 10, mandrel 10 is by rotating with the two end supports state, reach the purpose that prevents the centrifugal rotation of mandrel, spinning parts 20 move axially towards the direction away from the marginal ridge end.
Fig. 2 (B) compares with Fig. 2 (A), the two ends outer wall of cylindric plain pipe 30 all is processed into the marginal ridge shape, fix near the first controlled parts 15 of an end that support rotary part 41, the other end is bestowed collision tension force optional feature 50, and the axis of collision tension force optional feature 50 cylindric plain pipe 30 in the direction upper edge identical with the moving direction of spinning parts 20 is bestowed tension force.Compare with Fig. 2 (A), actively bestow tension force, thereby can further improve shape stability.
Fig. 3 and equipment shown in Figure 4 are to be specifically designed to the long thin cylinder body of production length.
Fig. 3 (A) and (B) shown in, cylindric plain pipe 30 is installed on the mandrel 10, make cylindric plain pipe 30 with mandrel 10 rotations by supporting rotary part 40 drivings, limit an end 31 of cylindric plain pipe simultaneously with cylindric plain management and control member made 15, with the tension force optional feature 50 restriction other ends 32, direction of principal axis at cylindric plain pipe 30 is bestowed tension force, described tension force accessory components 50 is a pull bar, Fig. 3 (A) is that the edge shape is processed in an end 32 inboards that cylindric plain pipe cooperates with tension force optional feature 50, pull bar clamps medial margin shape part, then towards moving in the opposite direction with spinning parts 20 sides of moving axially.Fig. 3 (B) is that cylindric plain pipe bottom interior wall is straight tubular, and outer wall is processed into edge shape 33, and pull bar clamps the edge shape part 33 on the outer wall, then towards moving in the opposite direction with spinning parts 20 sides of moving axially.In the time of the plain pipe of spinning parts 20 extrusion cylinder shapes 30 walls, stretching the opposite direction of tension direction and moving with drawing.Cylindric plain pipe 30 is limited by cylindric plain management and control member made 15, therefore, subtracts thick cylinder in plastic working and stretches towards the right among the figure.
Structure shown in Fig. 3 (C) and Fig. 3 (B) are basic identical, and just tension force accessory components 50 is not to clamp outer wall edge shape part 33, but directly fasten edge shape part 33 towards moving in the opposite direction with spinning parts 20 sides of moving axially.
Fig. 3 (D) manages an end of 30 with the cylindric element of plain management and control member made 15 restrictions, bestow tension force for the other end of cylindric plain pipe 30 with the tension force optional feature 50 that connects mandrel 10 central parts, limit rotation mandrel 10 and cylindric element manage 30 simultaneously, with the wall of the plain pipe 30 of spinning parts 20 extrusion cylinder shapes, plain pipe control part 15 is shifted to the right-hand of figure.In addition, in this diagram, tension force optional feature 50 connects the axle central part of mandrel 10 and bestows tension force, and the end shape of the cylindric plain pipe 30 that turns back at the lateral border collision tension force optional feature of processing, also can be bestowed tension force from the outer circumferential side of cylindric plain pipe 30.
Above-mentioned Fig. 1～Fig. 3 is mandrel 10 and the together rotation of cylindric plain pipe 30, and spinning parts 20 are made and only done rotation and do not revolve round the sun.
Fig. 4 is that mandrel 10 and cylindric plain pipe 30 do not rotate, and spinning parts 20 had both revolved round the sun to the cylindric plain situation that 30 outer walls carry out rotary pressing processing of managing do rotation.
Two, differential temperature process technology
Continuous multi-stage is smoothed out with the fingers processing and has been stretched directly again and to stretch and reversely stretch two kinds again, here explain directly to be stretched as example again, make mould as shown in Figure 5, this mould includes drift 1, punch die 2 and flanging 3, be provided with liquid cooling passage 4 in the drift 1, and be provided with heating element heater 5 in the punch die 2, the drift shoulder radius of mould is 3mm, punch die shoulder radius is 4mm, and extensibility (punch diameter that stretches again/elementary punch diameter * 100) is 80,70,65,60,55,50 and 45% again.Extensibility represents that numerical value is more little again, and the moulding difficulty of making not only narrow but also dark tubing is high more.
Test material
Test material uses SUS304 (nominal plate thickness 0.8mm).The extension test of test material is mutually 0 degree by adopting with rolling direction, and the 13B test film of the JISZ2201 of 45 degree and 90 degree directions utilizes accurate omnipotent test machine to test.Test condition is, initial stage crossbeam speed 3mm/min, and deformation is 10mm/min below 5%.Probe temperature is 20 ℃, 100 ℃, and 150 ℃.
Mechanical performance and temperature dependency are as shown in Figure 6.Hot strength under 150 ℃ reduces about 40% with 20 ℃ compare.0.2% endurance reduces 25% approximately.And elongation at break reduces about 40%.The anisotropy of 0.2% endurance as shown in Figure 7.Fig. 7 shows that this studies employed SUS304, the anisotropy when being in 45 degree directions with rolling direction a little less than.
Stretch and smooth out with the fingers the elementary drawing and forming product that use in the processing, punch diameter φ 60mm, draw ratio (initial stage blank diameter/elementary stretching punch diameter) are 2.0,2.4 and 2.6 3 kind.The condition of molding of elementary stretching is as shown in table 1.
The elementary drawing and forming condition of table 1
Method of testing
Stretch and smooth out with the fingers in the processing test, the mould that the cylinder that trial-production is come out stretches is again estimated, and investigates the martensitic phase variable that its processing has lured, and the thickness of slab of formed products and formed products quality.Formability is estimated by the feasible extensibility again that crack-free is shaped.
Test condition is that pressure-pad-force is 10kN, and the temperature of punch die and flanging is 70～200 ℃, and the drift temperature is-7～20 ℃.After lubricant is elementary stretching, to the outside water-soluble punching press of coating (press) work oil in the formed products.Testing arrangement uses the moulding processing test machine of oil pressure.The martensitic phase variable that processing has lured, utilization Ferrite Scope analyzer is measured.
Test result
The wall thickness measuring position of elementary stretch forming product (draw ratio 2.6) as shown in Figure 8, Thickness Distribution is as shown in Figure 9.
As we can see from the figure, the thickness of slab of drift head has reduced.And because the anisotropic character of test material, so near the difference of the thickness of slab of the circumferencial direction drift shoulder and the flange is bigger.It is among 2.0 and 2.4 the formed products that this problem is present in draw ratio too.
The martensitic phase variable that the processing of each formed products has lured as shown in figure 10.
Show as a comparison the result of shaping formed products under room temperature (30 ℃) among the figure.The formed products that differential temperature stretches is that its drift will cool off.Also can reduce the limit thickness of slab of drift shoulder, so the martensitic phase variable that has lured because of processing on the drift shoulder, about 8% in the draw ratio 2.6, about 1% measured comes out in the draw ratio 2.0.But what can confirm is, is shaped with room temperature and compares, and differential temperature stretch forming product can suppress phase variable significantly.As Figure 10, any one is shaped, and the martensitic phase variable of their drift shoulder has all increased, but sidewall sections is shown as 0 mostly.
Stretch again and smooth out with the fingers processing forming
Stretching, it is as shown in table 2 to smooth out with the fingers the processing test result again, is that limit extensibility again is 80% under 30 ℃ the situation in punch die flanging and drift temperature.Relative therewith, because raise punch die and flanging temperature, so the limit that is shaped has also improved.And when the punch die temperature is 120 ℃, the flanging temperature is 80 ℃, and when the drift temperature was 20 ℃, limit extensibility again brought up to 60%.Moreover when punch die and flanging temperature are 200 ℃, when the drift temperature was-7 ℃, limit extensibility again became 55%.Learn thus, stretch again and smooth out with the fingers processing forming and depend on the forming temperature condition.In addition, the condition of this test is not subjected to the influence of elementary draw ratio.
Table 2 stretches and smoothes out with the fingers the processing test result
Smooth out with the fingers in the process of processing stretching again, to cause the drift shoulder to break because of exceedingly reducing thickness of slab.In order to improve the intensity of crackly drift shoulder, the cooling of drift shoulder is very important.In addition, the temperature of punch die and flanging can have influence on the flow resistance of material.Therefore, for improving the moulding limit, higher punch die is set and the flanging temperature is an effective method.Differential temperature stretch process method can help stretching again and smooth out with the fingers processing, and to produce extensibility be 55% again, and the profile ratio is the very dark formed products of 3.3 (forming height/(punch diameter that stretch again+sheet material wall thickness * 2)).
Stretch again and smooth out with the fingers the quality of processing back finished product
Again extensibility be 60% Thickness Distribution as shown in figure 11.Stretch and smooth out with the fingers after the processing, the wall thickness of drift shoulder presents the reduction of locality.And, in the elementary drawing process, present the drift shoulder that locality sheet material wall thickness reduces, with shown position unanimity among the figure.But the wall thickness change of this part is little.
We think that this phenomenon is subject to processing the sclerosis influence.Draw by above, elementary drawing process, the minimizing of drift shoulder sheet material wall thickness can not produce big influence to the moulding limit of smoothing out with the fingers processing that stretches again.
After stretching, draw ratio is that 2.6 sidewall Thickness Distribution is even again.In the elementary drawing process, draw ratio is that the wall thickness of 2.6 drift head has reduced a lot, so differ bigger with the sidewall wall thickness.Learn that thus the Thickness Distribution of elementary stretching can have influence on the product quality through stretching again after smoothing out with the fingers processing.
Again extensibility be the martensitic phase variable that lured of 55% processing as shown in figure 12.
Draw ratio is that 2.0 drift shoulder phase variable is about 5%, draw ratio be 2.6 be 7-17%.The reason that produces this variation is punch die temperature and flanging temperature instability, must will examine heater or the like.In addition, the martensitic phase variable maximum of the shown sample 3 of Figure 12 is 7%.The martensitic phase variable of processing relevant with cracking (it is generally acknowledged that 10% above martensitic phase variable is cracking danger line 2).Learn thus,, taked the method for equilibrium temperature condition, can omit the operation of final annealing to a great extent at the problem of cracking.
Reducing stretches again smoothes out with the fingers the method for processing temperature
Before this, smooth out with the fingers the research of machine-shaping, can hold the relation of forming temperature and mouldability through differential temperature is stretched again.If punch die and flanging temperature have raise, mouldability also can improve, thereby obtains 55% limit extensibility again.Yet, must follow punch die the temperature of flanging to be set in 200 ℃, but also wish simultaneously aspect practical, to realize low temperatureization.Smooth out with the fingers the forming temperature of processing in order to attempt reducing stretching, the martensitic phase variable that has carried out having lured about processing after the elementary stretching brings the research of influence for forming temperature and mouldability again.
Also carry out the differential temperature stretch process during elementary stretching, the finished product after the moulding (draw ratio 2.0) is annealed.Figure 13 shows the martensitic phase variable that the processing after the annealing has lured.After the annealed processing of martensitic phase variable that processing has lured, become 0%.
Same, be draw ratio that 2.4 and 2.6 moulding product are annealed, stretching then, it is as shown in table 3 to smooth out with the fingers the result that processing tests again.
Table 3 is drawing and forming (annealing back) again
Draw ratio is that 2.0 extensibility again is 45%, draw ratio be 2.4 and 2.6 all be 50%.In addition, be just can moulding under 150 ℃ the state in the temperature of punch die and flanging.The martensitic phase variable that lured of processing is to mouldability and the influence that brings of draft temperature condition is as shown in figure 14 again.
Above-mentioned draw ratio is 2.0, directly carries out differential temperature without annealing in process and stretches when smoothing out with the fingers processing, and it is 0.5% that the processing of ram bottom has lured the martensitic phase variable, the drift shoulder be 0.74%.And limit extensibility again is 55%, and punch die must be 200 ℃ with the flanging temperature.On the contrary, annealed processing can improve the moulding limit, reduces forming temperature.Learn that thus the martensitic phase variable that lured of processing has relation with the temperature conditions of smoothing out with the fingers processing forming and stretching again that stretches again, the processing that can suppress after the elementary stretching has lured the martensitic phase variable, having reduced the temperature that processing is smoothed out with the fingers in stretching more effectively.
Differential temperature stretch process method by adding hot die and flanging, reduces the flow resistance of material.Improve crackly drift shoulder intensity by the drift cooling, thereby improve the moulding limit.This temperature range is exactly that hot strength changes 0-100 ℃ maximum scope.So the hot strength of stainless steel SUS304 even be in the said temperature scope, is also tended to along with the rising of temperature reduce gradually.And because in the temperature range more than 90 ℃, can not produce the martensitic phase variable, so in order in elementary stretching, to suppress the martensitic phase variable, the temperature of drift is set to 80 ℃, and punch die and flanging temperature are 22 ℃, attempts utilizing the temperature difference of high-temperature scope to carry out drawing and forming.This way as shown in figure 15.Condition of molding is as shown in table 4, and the result is as shown in table 5.When processing in this temperature range, have the maximum drift shoulder of martensitic phase variable that processing has lured originally, its phase variable reduces to 0%.
The elementary drawing and forming condition of table 4
The processing of the drift shoulder of the elementary drawing and forming product of table 5 has lured the martensitic phase variable
| The punch die temperature | ??100℃ | ??220℃ |
| The flanging temperature | ??100℃ | ??220℃ |
| The drift temperature | ??0℃ | ??80℃ |
| Phase variable | ??1.4％ | ??0％ |
Under this temperature conditions, do not carry out extension test again.But the sample with annealed processing is the same, and hope can improve formability and reduce draft temperature again.On the mould engineering, hope can the low temperature processing stretching process again of difficult control temperature, and the method for the 1st grade of single stretching process of high temperature processing, as the stronger method of practicality in the mould engineering.
Stretching among the present invention is smoothed out with the fingers manufacturing procedure and is had the following advantages:
(1), carried out differential temperature stretch forming test again in order to use the differential temperature stretching technique to reach the purpose that shortens operation.The limit under room temperature state extensibility again is 80%, and is relative therewith, and differential temperature extensibility again is 55%.The result shows, can cut down 3 operations that comprise annealing operation.
(2) result shows, can smooth out with the fingers the martensitic phase variable that processing has lured after the machine-shaping stretching again and be suppressed at below 10%, and can omit the later annealing operation of 3rd level stretching.
(3) because stretching is smoothed out with the fingers in the manufacturing of processing mold again, be difficult to the temperature of control mould, reduce draft temperature method again so studied.Obtained the martensitic phase variable that the processing the same with the sample of competing to seize annealing in process has lured by improving elementary draft temperature compared with the past.The result shows, can reduce stretches again smoothes out with the fingers forming temperature in the manufacturing procedure.
The above; only for the preferable specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (5)
1. the manufacture method of thin-wall metal cylinder body comprises following processing step:
1. sheet metal is processed into cylindric plain pipe;
2. with cylindric plain pipe box on the mandrel of rotary pressing processing equipment, carry out rotary pressing processing and obtain elementary thin-wall metal cylinder body;
3. the elementary thin-wall metal cylinder body that 2. step is obtained carries out differential temperature and stretches and to smooth out with the fingers processing, and making body thickness is the following pipe fitting of 0.1mm;
4. pipe fitting two tip cut-offs after smoothing out with the fingers processing through differential temperature, keep the middle part body, finally make required thin-wall metal cylinder body.
2. the manufacture method of thin-wall metal cylinder body according to claim 1 is characterized in that: when rotary pressing processing, in the time of spinning workpiece is imposed axial tensile force.
3. the manufacture method of thin-wall metal cylinder body according to claim 1, it is characterized in that: the differential temperature stretching is smoothed out with the fingers processing steps and is: the drift that elementary thin-wall metal cylinder body is housed is compressed into punch die once, the process of compressing into is cooled off drift simultaneously, heats smoothing out with the fingers the processing punch die.
4. the manufacture method of thin-wall metal cylinder body according to claim 3 is characterized in that: the drift chilling temperature is controlled at-7 ℃～20 ℃, to the heating and temperature control of smoothing out with the fingers the processing punch die at 70 ℃～200 ℃.
5. the manufacture method of thin-wall metal cylinder body according to claim 3, it is characterized in that: the process velocity that drift is compressed into punch die is 10～1000mm/ second.
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| CN107774778A (en) * | 2016-08-31 | 2018-03-09 | 江苏凤凰木业有限公司 | A kind of thinning device for exerting of cylindrical part |
| CN108015146A (en) * | 2016-12-14 | 2018-05-11 | 航天特种材料及工艺技术研究所 | A kind of tension force ball spinning method |
| CN108015147A (en) * | 2016-12-14 | 2018-05-11 | 航天特种材料及工艺技术研究所 | A kind of tension force ball spinning equipment |
| CN110549072A (en) * | 2019-09-28 | 2019-12-10 | 贵州航天精工制造有限公司 | Machining method for cutting off hollow workpiece |
| CN112475913A (en) * | 2020-11-12 | 2021-03-12 | 中国航发南方工业有限公司 | Coupling clamp for thin-wall box-shaped part and machining method |
| CN115488638A (en) * | 2022-09-14 | 2022-12-20 | 陕西飞机工业有限责任公司 | Processing method and processing device for waist-shaped deep-tube part |
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|---|---|---|---|---|
| CN102091736A (en) * | 2010-11-04 | 2011-06-15 | 西北工业大学 | Core mold for spinning and forming large-size complex curved generatrix thin-wall member with transverse inner ribs |
| CN102091736B (en) * | 2010-11-04 | 2013-01-16 | 西北工业大学 | Core mold for spinning and forming large-size complex curved generatrix thin-wall member with transverse inner ribs |
| CN102489627A (en) * | 2011-12-07 | 2012-06-13 | 佛山市埃申特科技有限公司 | Method for manufacturing printing fuser film pipe |
| CN102489579A (en) * | 2011-12-07 | 2012-06-13 | 佛山市埃申特科技有限公司 | Production device for printing fuser film tube |
| CN103331355A (en) * | 2013-06-07 | 2013-10-02 | 浙江水利水电专科学校 | Cold-extruding and spinning composite precision forging method for non-straight cavity inner wall cup tube |
| CN104325195A (en) * | 2014-10-24 | 2015-02-04 | 昆山汉迪威机械有限公司 | Rotary thinning machine and processing technology thereof |
| CN105710182A (en) * | 2016-02-18 | 2016-06-29 | 江西洪都航空工业集团有限责任公司 | Spin-forming method for long-barrel-shaped part board |
| CN105710182B (en) * | 2016-02-18 | 2018-05-04 | 江西洪都航空工业集团有限责任公司 | A kind of long barrier part plate spin forming method |
| CN107774778A (en) * | 2016-08-31 | 2018-03-09 | 江苏凤凰木业有限公司 | A kind of thinning device for exerting of cylindrical part |
| CN108015146A (en) * | 2016-12-14 | 2018-05-11 | 航天特种材料及工艺技术研究所 | A kind of tension force ball spinning method |
| CN108015147A (en) * | 2016-12-14 | 2018-05-11 | 航天特种材料及工艺技术研究所 | A kind of tension force ball spinning equipment |
| CN110549072A (en) * | 2019-09-28 | 2019-12-10 | 贵州航天精工制造有限公司 | Machining method for cutting off hollow workpiece |
| CN112475913A (en) * | 2020-11-12 | 2021-03-12 | 中国航发南方工业有限公司 | Coupling clamp for thin-wall box-shaped part and machining method |
| CN115488638A (en) * | 2022-09-14 | 2022-12-20 | 陕西飞机工业有限责任公司 | Processing method and processing device for waist-shaped deep-tube part |
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