CN105215243A - Forging method and system capable of releasing stress of forged piece - Google Patents
Forging method and system capable of releasing stress of forged piece Download PDFInfo
- Publication number
- CN105215243A CN105215243A CN201510705563.5A CN201510705563A CN105215243A CN 105215243 A CN105215243 A CN 105215243A CN 201510705563 A CN201510705563 A CN 201510705563A CN 105215243 A CN105215243 A CN 105215243A
- Authority
- CN
- China
- Prior art keywords
- forge piece
- stress
- forging
- area
- discharge
- 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.)
- Granted
Links
- 238000005242 forging Methods 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000003754 machining Methods 0.000 claims description 17
- 238000000465 moulding Methods 0.000 claims description 8
- 238000007669 thermal treatment Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 4
- 238000003860 storage Methods 0.000 abstract description 6
- 238000005520 cutting process Methods 0.000 abstract description 3
- 230000035882 stress Effects 0.000 description 87
- 238000010606 normalization Methods 0.000 description 20
- 238000010586 diagram Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
One aspect of the present invention provides a forging method capable of releasing stress of a forged part, including: forging the material into a first forging piece by using a forging die; heat treating the first forging; and cutting a first region having stress concentration or storage in the first forging into a plurality of second regions, thereby obtaining a stress-relieved second forging. Therefore, the stress release is achieved by cutting the forged piece, the forged piece is helped to reach a stable state, and the yield after subsequent processing is effectively improved.
Description
Technical field
The invention relates to the method and system of forge piece Stress Release, in particular to forging method and the system that can discharge forge piece stress.
Background technology
Traditional forging is exerted pressure to material by the forging mold through design, and make material produce deformation through pressure, and increase hardness and tensile strength, the various extruding that plastic deformation produces cause the phenomenon that stress distribution is uneven or stress is concentrated in material.
Above-mentioned phenomenon, will cause great variation to processing dimension after forging, and uncontrollable.Heat treatment processing procedure can discharge by accelerated stress, and the high rigidity but simultaneously also causing forging softening (crystal grain-growth) thus to cause forging processing procedure to provide and high strength advantage lost efficacy.But because product demand is now more and more higher, especially in Mobile Industry, pursue thinner mobile phone thickness, then in workpiece requirement, thickness is thinner, the mechanism of strengthening material by lattice distortion, cause the mass storage of residual stress, these stress stored, discharges stress by after processing with the pattern of distortion, causes size Control not easily.
Summary of the invention
In view of this, the invention provides forging method and the forging system of enough release forge piece stress, can machining be carried out for forge piece and reach Stress Release, help forge piece to reach stable state, the yield after effective lifting following process.
Implement aspect according to the present invention first, propose a kind of forging method that can discharge forge piece stress, it comprises: forming step, and material forging molding is the first forge piece by forging mold by it; First homogeneous normalization step, it heat-treats described first forge piece is homogenized and normalization to described first forge piece; And Stress Release step, it is that a first area of described first forge piece is cut into a plurality of second area, uses the second forge piece obtaining stress and discharged.
Implement aspect according to the present invention second, propose a kind of forging method that can discharge forge piece stress, it comprises: forming step, and material forging molding is the first forge piece by forging mold by it; Stress Release step, it is that a first area of described first forge piece is cut into a plurality of second area, uses the second forge piece obtaining stress and discharged; And the first homogeneous normalization step, it heat-treats described second forge piece is homogenized and normalization to described second forge piece.
Aspect is implemented according to the present invention the 3rd; a kind of forging method that can discharge forge piece stress is proposed; it comprises the step that above-mentioned first implements aspect; and comprising the second homogeneous normalization step further, it heat-treats described second forge piece is homogenized and normalization to described second forge piece.
Implement aspect according to the present invention the 4th, propose a kind of forging method that can discharge forge piece stress, it based on arbitrary enforcement aspect of the invention described above, and can comprise further: Parameter setting step, and it produces described plurality of parameters for comprising setting; Wherein said Stress Release step is, according to described plurality of parameters, the described first area of described first forge piece is cut into described a plurality of second area to obtain described second forge piece.
Implement aspect according to the present invention the 5th, propose a kind of forging system that can discharge forge piece stress, it comprises: forging unit, and it utilizes forging mold to be the first forge piece by material forging molding; Machining cell, it, in order to one first area of described first forge piece is cut into a plurality of second area according to plurality of parameters, uses the second forge piece obtaining stress and discharged; Thermal treatment unit, it is in order to heat-treat described first forge piece or described second forge piece; And arithmetic element, it is in order to control described machining cell, and wherein said arithmetic element sets described plurality of parameters to described machining cell.
The beneficial effect adopting technique scheme to produce is:
Can machining be carried out for forge piece and reach Stress Release, help forge piece to reach stable state, the yield after effective lifting following process.
In order to have better understanding to above-mentioned enforcement aspect of the present invention and other aspects, hereafter for embodiment, and be described with reference to the accompanying drawings as follows.
Accompanying drawing explanation
Fig. 1 shows can discharge according to of the present invention the schematic flow diagram that first of the forging method of forge piece stress implements aspect.
Fig. 2 shows can discharge according to of the present invention the schematic flow diagram that second of the forging method of forge piece stress implements aspect.
Fig. 3 shows can discharge according to of the present invention the schematic flow diagram that the 3rd of the forging method of forge piece stress implements aspect.
Fig. 4 A shows the schematic diagram of the embodiment of the first forge piece.
Fig. 4 B shows the schematic diagram of the embodiment of the second forge piece.
Fig. 5 shows can discharge according to of the present invention the part schematic flow diagram that the 4th of the forging method of forge piece stress implements aspect.
Fig. 6 shows can discharge according to of the present invention the block schematic diagram that one of the forging system of forge piece stress implements aspect.
Wherein: 10: forging system; 100: forging unit; 110: thermal treatment unit; 120: machining cell; 150: arithmetic element; A1: first area; B1-B4: second area; F1: the first forge piece; F2: the second forge piece; G1-G4: grooving; ST1-ST4: region; S100, S110-S150: step; S110A, S120A: step.
Detailed description of the invention
The embodiment of forging method and the forging system that can discharge forge piece stress according to of the present invention is below proposed so that various enforcement aspect to be described.
Please refer to Fig. 1, its display can discharge according to of the present invention the schematic flow diagram that first of the forging method of forge piece stress implements aspect.As shown in Figure 1, the forging method that can discharge forge piece stress of this enforcement aspect at least comprises the following steps: forming step S100, the first homogeneous normalization step S110 and Stress Release step S120.
Forming step S100, material forging molding is the first forge piece by forging mold by it.
First homogeneous normalization step S110, it heat-treats described first forge piece is homogenized and normalization to described first forge piece.
Stress Release step S120, it is that a first area of described first forge piece is cut into a plurality of second area, uses the second forge piece obtaining stress and discharged.
In addition, implement in aspect, after wherein further the first homogeneous normalization step can being executed in Stress Release step at second of the forging method of forge piece stress that can discharge of the present invention.As shown in Figure 2, the forging method that can discharge forge piece stress of this enforcement aspect at least comprises the following steps: forming step S100, Stress Release step S120A and the first homogeneous normalization step S110A.
Performing the first forge piece that forming step S100 produces, is further Stress Release step S120A process.
Stress Release step S120A, it is that a first area of described first forge piece is cut into a plurality of second area, uses the second forge piece obtaining stress and discharged.
First homogeneous normalization step S110A, it heat-treats described second forge piece is homogenized and normalization to described second forge piece.
The method of above, Stress Release step is carried out in the region that the stress that can cause because pressure is excessive for forge piece is concentrated, the described region of described forge piece is divided be whittled into the stress pre-release effect that plurality of regions causes, workpiece is helped to reach stable state, the yield after effective lifting processing.
In addition, in the methods described above, homogeneous normalization step and Stress Release step are mutual collocation, make the residual stress of forge piece reach effective release.Implementing in aspect at first shown in Fig. 1, after the heat treatment of homogeneous normalization step, carry out Stress Release step again, is can thermal stress stored by releasing heat process.And implement, in aspect, after carrying out Stress Release step, to carry out the heat treatment of homogeneous normalization step again at second shown in Fig. 2, be can reduce heat treated thermal stress to store.
So homogeneous normalization step and Stress Release step are arranged in pairs or groups and are used, can catch stress store trap, and then can proof stress release needed for deflection and position.For example, as shown in Figure 3, it is the schematic flow diagram that can discharge the 3rd enforcement aspect of the forging method of forge piece stress of the present invention.Implement aspect compared to first, the 3rd implements aspect comprises the second homogeneous normalization step S130 further, and the second forge piece that its counter stress release steps S120 produces heat-treats described second forge piece is homogenized and normalization.But enforcement aspect of the present invention not limited by above-mentioned, can otherwise implement further, the such as the 3rd implements aspect can comprise another Stress Release step further, and such as the second enforcement aspect can comprise another Stress Release step further again.By this, with catch stress store trap, and then can proof stress release needed for deflection and position.
The enforcement aspect of aforesaid way is described with the embodiment of forge piece below.For convenience of explanation, implement aspect for first below, but other enforcement aspects also so can be analogized.
Please refer to the embodiment for implementing the first forge piece F1 that the forming step S100 of aspect produces through first shown in Fig. 4 A.After the heat treatment through the first homogeneous normalization step S110, the first forge piece F1 still has stress store or concentrate on diverse location.Such as, in Fig. 4 A, in the first area A1 of the first forge piece F1 illustrated in dashed rectangle, stress be store or concentrate on illustrated by dashed circle plurality of regions ST1, in ST2, ST3, ST4.So, perform Stress Release step S120, the first area A1 of the first forge piece F1 cut into a plurality of second area B1, B2, B3, B4, uses the second forge piece F2 obtaining stress and discharged.
In addition, in one embodiment, the first area of the first forge piece in above-mentioned Stress Release step (as S120 or S120A) be at least comprise as described in the central area of the first forge piece, first area A1 as shown in Figure 4 A.
In addition, in another embodiment, at least one stress of first forge piece as described in first area as described in first forge piece as described in above-mentioned Stress Release step (as S120 or S120A) comprises further is concentrated (or storage) position, as first area A1 in Fig. 4 A the person of signal.
In addition, in certain embodiments, above-mentioned Stress Release step (as S120 or S120A) comprises utilizing any one cutting way or its combination (as turning, boring, milling, slicing, grind, to bore a hole etc. or its combination), and pluralize the described first area of described first forge piece a grooving.For example, as shown in Figure 4 B, between a plurality of second area B1-B4 of the second forge piece F2, there is a plurality of grooving G1-G4.
Although above-described embodiment is used as exemplary explanation with Fig. 4 A and Fig. 4 B, but, the embodiment of counter stress release steps of the present invention is not limited, as long as this cuts step and can produce a plurality of second area and can reduce stress in the second forge piece, reach processing mode or the combination of the effect of release stress by this, all can be considered the embodiment of Stress Release step of the present invention.
And the present invention is not limited for the shape of the second forge piece in the forging mold in forming step and the first forge piece and Stress Release step, by this, in response to the demand (being such as mobile phone frame, computer frame, household electrical appliances frame) of forge piece final finished, so the change of any shape can be done.
In addition, Fig. 5 shows according to the part schematic flow diagram that can discharge the 4th enforcement aspect of the forging method of forge piece stress of the present invention.4th implements aspect can be regarded as comprising Parameter setting step S140 as shown in Figure 5 further in aforementioned arbitrary enforcement aspect.Parameter setting step S140 at least comprises the plurality of parameters that setting is applied to Stress Release step S120.4th to implement the Stress Release step S120 of aspect be that the first area of the first forge piece produced by forming step according to described plurality of parameters cuts into a plurality of second area to obtain the second forge piece.For example, described plurality of parameters is the parameter about machining, or about the parameter of the grooving between described a plurality of second area.
In an embodiment of Parameter setting step S140, it represents the described complex parameter read from a data bank or archives for Stress Release step S120.
In another embodiment of Parameter setting step S140, it comprises further: at least decide described plurality of parameters according to the stress-retained of forging type change in described forming step.In addition, can also by internal stress analytical instrument to learn the internal stress size of forge piece, direction decides described plurality of parameters.
Aspect is implemented according to the of the present invention 4th, the technology of arbitrary enforcement aspect of the invention described above or its combination can be utilized further to design a kind of automation or half automation system of processing, and propose a kind of processing method being widely used in other related process or equipment.
For example, Fig. 6 shows according to the block schematic diagram that can discharge an enforcement aspect of the forging system of forge piece stress of the present invention.As shown in Figure 6, forging system 10 at least comprises forging unit 100, thermal treatment unit 110, machining cell 120 and arithmetic element 150.Forging unit 100 utilizes forging mold to be the first forge piece by material forging molding.Machining cell 120, it, in order to one first area of described first forge piece is cut into a plurality of second area according to plurality of parameters, uses the second forge piece obtaining stress and discharged.Thermal treatment unit 110, it is in order to heat-treat described first forge piece or described first forge piece.Arithmetic element 150, it is connected to described machining cell 120, and at least in order to control described machining cell 120, wherein said arithmetic element 150 sets described plurality of parameters to described machining cell 120.
For example, described arithmetic element 150 is the Parameter setting step S140 realized in Fig. 5.In an embodiment of the enforcement aspect of Fig. 6, described arithmetic element 150 is the described plurality of parameters read from a data bank or archives for machining cell 120.
In another embodiment of the enforcement aspect of Fig. 6, described arithmetic element 150 is further in order at least to determine described plurality of parameters according to the stress-retained of forging type change in described forging unit 100.Such as, the program that arithmetic element 150 can perform Stress Release analysis (stressreleaseanalysis) such as utilizes CAD, analysis or simulation software (as Matlab, Simulink etc.) or the program of exclusive design, assist or automatically carry out the searching of the design of (1) grooving and (2) internal stress storage parameter, produce the aforementioned described plurality of parameters for Stress Release step by this.
For example, (1) grooving designs: refer to the optimal grooving design of stress-retained searching in becoming for forging type, develop best parameter of V-notched, make forging reach the stable state of stress equilibrium.Such as, the plurality of parameters about grooving is, the number of grooving, length and width size, but is not limited thereto.
(2) searching of internal stress storage parameter: be find the internal stress because of forging storage in processing procedure, enable forge piece reach the effect of Stress Release by aforesaid stresses release steps (as S120 or S120A).
So, utilize according to the forging system of enforcement aspect of Fig. 6 or automation or half automation process equipment, or in original process equipment, realize the forging method of above-mentioned arbitrary enforcement aspect or combination, the residual stress of forge piece effectively can be discharged in procedure, help the state that described forge piece reaches stable by this, yield after effective lifting processing, and can extra cost be reduced.
In sum, content of the present invention illustrates with embodiment as above, but the present invention is not only defined in these embodiments.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when carrying out various changes and modification again; Such as, each technology contents illustrated in previous embodiment is combined or changed and becomes new embodiment, these embodiments are also considered as one of content belonging to the present invention certainly.Therefore, this case for the scope scope that also comprises aforesaid claim and define of protection.
Claims (10)
1. can discharge a forging method for forge piece stress, it comprises:
Be the first forge piece by forging mold by material forging molding;
Described first forge piece is heat-treated; And
The first area having stress to concentrate in described first forge piece or to store is cut into a plurality of second area, uses the second forge piece obtaining stress and discharged.
2. the forging method that can discharge forge piece stress according to claim 1, wherein in described Stress Release step, the described first area of described first forge piece is the central area at least comprising described first forge piece.
3. the forging method that can discharge forge piece stress according to claim 2, wherein in described Stress Release step, the described first area of described first forge piece comprises at least one stress concentrated position of described first forge piece further.
4. the forging method that can discharge forge piece stress according to claim 1, comprises further:
Described second forge piece is heat-treated.
5. the forging method that can discharge forge piece stress according to claim arbitrary in Claims 1-4, has a plurality of grooving between described a plurality of second area of wherein said second forge piece.
6. the forging method that can discharge forge piece stress according to claim 5, comprises further:
Parameter setting step, it produces described plurality of parameters for comprising setting;
Wherein said Stress Release step is, according to described plurality of parameters, the described first area of described first forge piece is cut into described a plurality of second area to obtain described second forge piece.
7. can discharge a forging method for forge piece stress, it comprises:
Be the first forge piece by forging mold by material forging molding;
It is for cut into a plurality of second area by a first area of described first forge piece, uses the second forge piece obtaining stress and discharged; And
Described second forge piece is heat-treated.
8. the forging method that can discharge forge piece stress according to claim 7, has a plurality of grooving between described a plurality of second area of wherein said second forge piece.
9. can discharge a forging system for forge piece stress, it comprises:
Forging unit, it utilizes forging mold to be the first forge piece by material forging molding;
Machining cell, it, in order to the first area having stress to concentrate in described first forge piece or to store is cut into a plurality of second area according to plurality of parameters, uses the second forge piece obtaining stress and discharged;
Thermal treatment unit, it is in order to heat-treat described first forge piece or described second forge piece; And
Arithmetic element, it is connected to described machining cell, and in order to control described machining cell, wherein said arithmetic element sets described plurality of parameters to described machining cell.
10. the forging system that can discharge forge piece stress according to claim 9, wherein said arithmetic element is further in order at least to determine described plurality of parameters according to the stress-retained of forging type change in described forging unit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW104118048A TWI590890B (en) | 2015-06-04 | 2015-06-04 | Forging method and system capable of relieving stress of a forged part |
| TW104118048 | 2015-06-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105215243A true CN105215243A (en) | 2016-01-06 |
| CN105215243B CN105215243B (en) | 2017-07-04 |
Family
ID=54984698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510705563.5A Expired - Fee Related CN105215243B (en) | 2015-06-04 | 2015-10-27 | Forging method and system capable of releasing stress of forged piece |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105215243B (en) |
| TW (1) | TWI590890B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110947888A (en) * | 2019-12-18 | 2020-04-03 | 中机精密成形产业技术研究院（安徽）股份有限公司 | Forging process and forging equipment for box wagon lock base |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108160888A (en) * | 2017-12-26 | 2018-06-15 | 洛阳晟雅镁合金科技有限公司 | A kind of forging rolling technique of ZK61M magnesium alloys Round Billet |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11254068A (en) * | 1998-03-10 | 1999-09-21 | Toyo Seikan Kaisha Ltd | Forming method for can body and can body |
| CN102892261A (en) * | 2011-07-21 | 2013-01-23 | 苏州唐峰金属制品有限公司 | Cabinet shell board |
| CN103231002A (en) * | 2013-04-19 | 2013-08-07 | 亚超特工业有限公司 | Forging mould and molding method of metal casing applied to electronic device |
| CN203225960U (en) * | 2013-02-27 | 2013-10-02 | 比亚迪股份有限公司 | Intramode injection moulding housing and portable mobile terminal with same |
| CN203297303U (en) * | 2013-05-14 | 2013-11-20 | 佳木斯电机股份有限公司 | Welding rib structure shaft |
-
2015
- 2015-06-04 TW TW104118048A patent/TWI590890B/en not_active IP Right Cessation
- 2015-10-27 CN CN201510705563.5A patent/CN105215243B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11254068A (en) * | 1998-03-10 | 1999-09-21 | Toyo Seikan Kaisha Ltd | Forming method for can body and can body |
| CN102892261A (en) * | 2011-07-21 | 2013-01-23 | 苏州唐峰金属制品有限公司 | Cabinet shell board |
| CN203225960U (en) * | 2013-02-27 | 2013-10-02 | 比亚迪股份有限公司 | Intramode injection moulding housing and portable mobile terminal with same |
| CN103231002A (en) * | 2013-04-19 | 2013-08-07 | 亚超特工业有限公司 | Forging mould and molding method of metal casing applied to electronic device |
| CN203297303U (en) * | 2013-05-14 | 2013-11-20 | 佳木斯电机股份有限公司 | Welding rib structure shaft |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110947888A (en) * | 2019-12-18 | 2020-04-03 | 中机精密成形产业技术研究院（安徽）股份有限公司 | Forging process and forging equipment for box wagon lock base |
| CN110947888B (en) * | 2019-12-18 | 2021-03-23 | 中机精密成形产业技术研究院（安徽）股份有限公司 | Forging process and forging equipment for box wagon lock base |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201642969A (en) | 2016-12-16 |
| CN105215243B (en) | 2017-07-04 |
| TWI590890B (en) | 2017-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wahid et al. | Improvement of one factor at a time through design of experiments | |
| WO2005025779B1 (en) | Layered manufactured articles having small-width fluid conduction vents and methods of making same | |
| CN105215243A (en) | Forging method and system capable of releasing stress of forged piece | |
| Esmaili et al. | The study of deep drawing of brass-steel laminated sheet composite using taguchi method | |
| CN104902714A (en) | Production technology of intermediate frame structure and intermediate frame structure | |
| Aksenov et al. | 3D printed plastic tool for Al thin-sheet forming | |
| CN106695255A (en) | Key production process | |
| CN106156446A (en) | Plastic forming process energy consumption analysis method based on numerical simulation | |
| CN116306022A (en) | Method, device, equipment and storage medium for optimally designing cutter | |
| CN104226797B (en) | The manufacture method of fan propeller | |
| Aksenov et al. | Thin sheet forming with 3D printed plastic tool | |
| CN103941674B (en) | A kind of method for designing of multichannel management and control technological process | |
| JP5765013B2 (en) | Springback factor analysis method in multi-process press forming | |
| CN107497874B (en) | A kind of pressing method using curved interface structure regulating magnesium alloy plate texture | |
| CN201791818U (en) | Mesh punching and shearing mold | |
| JP6316104B2 (en) | Washer manufacturing method | |
| JP2005271034A (en) | Manufacturing method of rough-shaped material for deep grooved ball bearing race in good yield | |
| CN112380749A (en) | Manufacturing method based on rolling wheel optimization design mathematical model | |
| JP2004290983A (en) | Manufacturing method of taper bearing race | |
| TWI840951B (en) | Forming method of processing curve in stamping process | |
| CN104175567A (en) | Carbon fiber treatment method and product thereof | |
| CN201131082Y (en) | Process board for preventing thermal expansion | |
| CN107225182A (en) | Dimensional piece part processing mold and process forming method | |
| Tran et al. | A study of the ability of the deformation of titanium sheet by hot single point incremental forming technology | |
| Laxmi et al. | Design of progressive die using FE analysis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170704 |