CN101780508B - Process for machining screw pit at tensile part mouth - Google Patents
Process for machining screw pit at tensile part mouth Download PDFInfo
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- CN101780508B CN101780508B CN2009102314290A CN200910231429A CN101780508B CN 101780508 B CN101780508 B CN 101780508B CN 2009102314290 A CN2009102314290 A CN 2009102314290A CN 200910231429 A CN200910231429 A CN 200910231429A CN 101780508 B CN101780508 B CN 101780508B
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Abstract
The invention discloses a process for machining a screw pit at a tensile part mouth, which comprises the following steps: first performing a stretching process to obtain a tensile piece, namely a tensile part (19), and then integrating a shaping process of the screw pit (20) into trimming and punching processes of the tensile part (19), wherein the shaping process of the screw pit (20) is performed before the trimming and punching processes of the tensile part (19). The machining for the screw pit at the tensile part mouth realizes the shaping of the screw pit, and trimming and punching of the part at one time, the machining processes are reduced, a die is not required, the production efficiency is improved, the defect that the shaping process for the screw pit is separately arranged or merged to the post process to cause stretching deformation of a screw hole and an edge in the prior art is overcome, and the rejection rate is reduced.
Description
Technical field
The present invention relates to the processing technology of screw pit at tensile part mouth, for example the processing technology of the edge screw pit of television rear shell.
Background technology
Household electrical appliance for example television set are to be assembled by some parts such as fore shell, back cover, display, circuit boards; Fore shell and back cover link together through screw; And the face that the back cover of television set contacts with fore shell is a cambered surface; Cause screw can't connect fore shell and back cover, this just must form the spill plane nest of being convenient to mounting screw on the back cover cambered surface, therefore; Let television set the assembling of fore shell and back cover smoothly, just require the fore shell of television set accurate, contact plane is consistent with the position mounting hole site of back cover attachment screw.
The screw pit of television rear shell generally will be realized through punch forming; And the fillet of screw pit is generally all smaller; And the stretching die oral area profile of tensile part is generally the mild rounding off of simple curve; Otherwise will make part produce drawing crack, wrinkling, draw quality problems such as trace, the product appearance quality can not reach designing requirement.Existing forming technique is with screw pit and the stretching processing of putting together, and bad phenomenon such as trace and crackle have appearred drawing in product appearance; And the part that will have screw pit class shape take to stretch earlier shaping again or trimming and postorder merged accomplish and can solve, but the shaping again of taking to stretch earlier need increase trimming, has improved production cost, is unfavorable for energy efficiency; As take trimming is merged to the moulding of accomplishing screw pit in the later operation of cutting edge, phenomenon such as can cause screw hole and edge to be pulled out of shape and inconsistent influence the presentation quality and whole assembling of product, and the qualification rate of reduction product influences the development of enterprise.
Summary of the invention
Be to solve many weak points that the processing method of existing screw pit at tensile part mouth exists, the invention provides a kind of processing technology of screw pit at tensile part mouth that operation can guarantee the crudy of screw pit again that do not increase.
For realizing above-mentioned purpose; The invention provides a kind of processing technology of screw pit at tensile part mouth; Drawn operation at first; Obtaining tensioning member is tensile part 19, then the trimming of screw pit 20 is incorporated in the side cut, punching operation of tensile part 19, and the trimming of screw pit 20 is prior to side cut, the punching operation of tensile part 19.Mould does not need to increase, and has reduced the operation of processing, has changed many drawbacks that existing processing method exists simultaneously.
In said stretching process, earlier screw pit 20 is carried out shallow stretching, to prevent phenomenons such as tensile part 19 is wrinkling because of following trimming shaping too suddenly causes, drawing crack.
The operation of the edge-cutting and hole-punching of said screw pit 20 shapings, tensile part 19 is to be placed into tensile part 19 on the punch 14 and with positioner and to locate; Patrix is descending, under the effect of patrix discharging spring 9, moves back that part plate 7 engages with part 19 and fits with punch 14, makes screw pit 20 moulding, accomplishes trimming; Patrix continues descending, and die 3 clamps the edge of part under the effect of counterdie discharging spring 11 with stripper 10; Patrix continues descending, and die 3, drift drift 8, screw mounting hole drift 15 cooperate with punch 14 to be implemented to cut edge and punching to part 19, comprises and goes out screw mounting hole 21, accomplishes side cut, punching operation; Patrix returns to be removed, because the effect of patrix discharging spring 9, moves back part plate 7 and pushes down part and make it and return the die of removing 3 and separate, and guarantees that the good part of punching out is indeformable; Patrix is out of service, takes out the tensile part 19 of accomplishing shaping, side cut, punching operation.
Spring force and stroke through regulating patrix inloading part spring 9 make screw pit 20 first moulding, could cut edge then and the punching operation.
Through the stroke of adjusting patrix discharging screw 6 and the spring force of patrix inloading part spring 9; It is consistent with the shape of part requirement with punch 14 shapes to make patrix move back part plate 7; The stroke H that patrix discharging screw 6 is set is 10～15mm, and the power of patrix inloading part spring 9 is 40～60 tons.
The present invention adopts the processing technology of above-mentioned screw pit at tensile part mouth, the screw pit trimming is merged in the side cut, punching operation of part, and the part power of moving back that strengthens patrix discharging spring just can reach the effect of screw pit shaping; Mould does not need to increase; The die cost input also seldom when having guaranteed the product design requirement, has reduced the operation of processing; Realized that screw pit shaping and part are cut edge, the one-shot forming of punching; Reduced the operation of processing, improved the efficient of producing, changed the screw pit trimming to be set separately in the prior art or to merge to and cause in the postorder that screw hole and edge draw the drawback of distortion; Reduce percent defective, reached energy saving purposes.
Description of drawings
Fig. 1 is the part front view behind the tensile part drawn;
Fig. 2 is the part vertical view behind the tensile part drawn;
Fig. 3 is an A-A cutaway view Amplified image among Fig. 2;
Fig. 4 is shaping, side cut, punching sketch map and the die drawing of tensile part;
Fig. 5 is the part front view of tensile part after shaping, side cut, punching after stretching;
Fig. 6 is the part vertical view of tensile part after shaping, side cut, punching after stretching;
Fig. 7 is a B-B cutaway view Amplified image among Fig. 6.
Among the figure: masterplate 2 die blocks 3 dies 4 drift fixed head hold-down screws 5 drift fixed heads 6 patrix discharging screws 7 move back part plate 8 drifts 9 patrix inloading part springs 10 strippers 11 counterdie discharging springs 12 lower bolsters 13 punch retainers 14 punch 15 screw mounting hole drifts 16 punch hold-down screws 17 locating holes 18 counterdie discharging screws 19 tensile parts 20 screw pits 21 screw mounting holes on 1
The specific embodiment
As shown in Figure 4; The processing mold of screw pit at tensile part mouth of the present invention; Screw pit moulding, the part edge of the part after realizing stretching cut edge, the part punching; Comprise the punching of screw mounting hole after the screw pit moulding, its structure is following: comprise upper die and lower die, patrix comprises cope match-plate pattern 1, die block 2, die 3, drift fixed head 5, moves back part plate 7, drift 8, screw mounting hole drift 15, patrix discharging spring 9; Patrix discharging spring 9 is installed below the cope match-plate pattern 1 in order and is moved back part plate 7; Be installed with the die of arranging along the part edge that needs to cut edge 3 through die block 2 below the cope match-plate pattern 1, drift 8, screw mounting hole drift 15 are fixing jointly by drift fixed head 5 and cope match-plate pattern 1, drift fixed head 5 through drift fixed head hold-down screw 4 be fixed to cope match-plate pattern 1 middle part below; Counterdie comprises lower bolster 12, stripper 10, counterdie discharging spring 11, punch retainer 13, punch 14; Punch 14 is fixed on the punch retainer 13; Punch retainer 13 through punch hold-down screw 16 be fixed on lower bolster 12 middle parts above; Counterdie discharging spring 11, stripper 10 also are installed in order, stripper 10 and die 3 corresponding layouts above the lower bolster 12; Under the effect of patrix discharging spring 9, move back part plate 7 and can tensile part 19 and punch 14 be fitted; When patrix fell, die 3 was pressed close to punch 14 and is fallen and certain clearance is arranged, and 0.04～0.05mm is generally got in the gap, and the waste material under can in punching course, will shearing separates with tensile part; Through cooperating of the alignment pin on the locating hole 17 on tensile part 19 peripheries and the punch 14, tensile part 19 accurately is fixed on the punch 14.Cope match-plate pattern 1 and moving back is provided with between the part plate 7 can adjust the patrix discharging screw 6 that moves back part plate 7 height; Be provided with the counterdie discharging screw 18 that to adjust counterdie stripper 10 height between lower bolster 12 and the counterdie stripper 10, so conveniently move back the height adjustment of part plate 7 and stripper 10; Move back part plate 7 and punch 14 in the position that needs compacting screw pit 20 accordingly respectively correspondence be provided with screw pit 20 formation structures, screw mounting hole drift 15 is over against the position of the screw mounting hole that needs punching out 21; The spring force of patrix inloading part spring 9 and stroke enough make screw pit 20 first moulding; Just cut edge then and punching; In order to reach better effect, regulate the stroke of patrix discharging screw 6 and the power of patrix inloading part spring 9, it is consistent with the shape that part requires to make patrix move back the punch shape of part plate and counterdie; The stroke H that patrix discharging screw 6 is set is 10～15mm, and the power of patrix inloading part spring 9 is 40～60 tons.
Adopt above-mentioned mould, the processing technology of screw pit at tensile part mouth of the present invention is following:
1, drawn operation; Obtaining tensioning member as shown in Figure 1 is tensile part 19; And the shape that the shallow stretching of screw pit needs is set on drawing die, screw pit is carried out shallow stretching, to prevent phenomenons such as tensile part 19 is wrinkling because of following trimming shaping too suddenly causes, drawing crack;
2, put into the tensile part 19 after stretching on the counterdie of above-mentioned mould, the locating hole 17 of assurance tensile part 19 cooperates with the alignment pin on the punch 14, guarantees the accurate of part position;
3, patrix is descending, is moving back part plate 7 under the effect of patrix discharging spring 9, moves back that part plate 7 engages with part 19 and fits with punch 14, makes the screw pit moulding, accomplishes trimming;
4, the patrix continuation is descending, and die 3 clamps the edge of part under the effect of counterdie discharging spring 11 with stripper 10;
5, the patrix continuation is descending, and die 3, drift drift 8, screw mounting hole drift 15 cooperate with punch 14 to be implemented to cut edge and punchings to part 19, comprises and goes out screw mounting hole 21, accomplishes side cut, punching operation;
6, patrix returns and removes, because the effect of patrix discharging spring 9, moves back part plate 7 and pushes down part and make it and return the die of removing 3 and separate, and guarantees that the good part of punching out is indeformable;
7, patrix is out of service, takes out the tensile part 19 of accomplishing shaping, side cut, punching operation.
The present invention adopts the processing technology of above-mentioned screw pit at tensile part mouth, the screw pit trimming is merged in the side cut, punching operation of part, and the part power of moving back that strengthens patrix discharging spring just can reach the effect of screw pit shaping; Mould does not need to increase; The die cost input also seldom when having guaranteed the product design requirement, has reduced the operation of processing; Realized that screw pit shaping and part are cut edge, the one-shot forming of punching; Reduced the operation of processing, improved the efficient of producing, changed the screw pit trimming to be set separately in the prior art or trimming merged to and cause in the postorder that screw hole and edge draw the drawback of distortion; Reduce percent defective, reached energy saving purposes.
Though the present invention discloses as above with a preferred embodiment; Right its is not in order to limit the present invention; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (4)
1. the processing technology of a screw pit at tensile part mouth; Drawn operation at first; Obtaining tensioning member is tensile part (19); Then the trimming of screw pit (20) is incorporated in the side cut, punching operation of tensile part (19), and the trimming of screw pit (20) is prior to side cut, the punching operation of tensile part (19); The side cut of said screw pit (20) shaping, tensile part (19), the operation of punching are to be placed into punch (14) to tensile part (19) and to go up and locate with positioner; Patrix is descending, under the effect of patrix discharging spring (9), moves back that part plate (7) engages with tensile part (19) and fits with punch (14), makes screw pit (20) moulding, accomplishes trimming; Patrix continues descending, and die (3) clamps the edge of tensile part under the effect of counterdie discharging spring (11) with stripper (10); Patrix continues descending, and die (3), drift (8), screw mounting hole drift (15) cooperate with punch (14) to be implemented to cut edge and punching to tensile part (19), comprises and goes out screw mounting hole (21), accomplishes side cut, punching operation; Patrix returns to be removed, because the effect of patrix discharging spring (9), moves back part plate (7) and pushes down tensile part it is separated with the die of time removing (3), guarantees that the good tensile part of punching out is indeformable; Patrix is out of service, takes out the tensile part (19) of accomplishing shaping, side cut, punching operation.
2. the processing technology of a kind of screw pit at tensile part mouth according to claim 1 is characterized in that: in said stretching process, earlier screw pit (20) is carried out shallow stretching.
3. the processing technology of a kind of screw pit at tensile part mouth according to claim 2 is characterized in that: spring force and stroke through regulating patrix discharging spring (9) make the first moulding of screw pit (20), could cut edge then and the punching operation.
4. the processing technology of a kind of screw pit at tensile part mouth according to claim 2; It is characterized in that: through the stroke of adjusting patrix discharging screw (6) and the spring force of patrix discharging spring (9); Make that to move back part plate (7) and punch (14) shape consistent with the shape that part requires; The stroke H that patrix discharging screw (6) is set is 10～15mm, and the power of patrix discharging spring (9) is 40～60 tons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102314290A CN101780508B (en) | 2009-12-07 | 2009-12-07 | Process for machining screw pit at tensile part mouth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102314290A CN101780508B (en) | 2009-12-07 | 2009-12-07 | Process for machining screw pit at tensile part mouth |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101780508A CN101780508A (en) | 2010-07-21 |
| CN101780508B true CN101780508B (en) | 2012-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102314290A Active CN101780508B (en) | 2009-12-07 | 2009-12-07 | Process for machining screw pit at tensile part mouth |
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| CN (1) | CN101780508B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105081099A (en) * | 2015-09-02 | 2015-11-25 | 江苏荣腾精密组件科技股份有限公司 | Punching and trimming die |
| CN108746339B (en) * | 2018-07-10 | 2024-04-26 | 广州沃福模具有限公司 | Cold stamping method for producing lower cover of soymilk machine |
| CN111570600B (en) * | 2020-05-20 | 2022-10-11 | 东风柳州汽车有限公司 | Manufacturing process method of aluminum alloy stamping die surface |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB524409A (en) * | 1938-07-13 | 1940-08-06 | Armstrong Cork Co | Improvements in or relating to dies |
| CN86200507U (en) * | 1986-01-17 | 1987-02-25 | 上海重型模锻厂 | Three-way compound die device with die-forging cutting shoulder punched hole and correction |
| CN2255321Y (en) * | 1996-04-24 | 1997-06-04 | 云南变压器厂 | Three-procedure composite die for forming, flanging and hole cutting |
| CN1733384A (en) * | 2005-07-13 | 2006-02-15 | 兰州理工大学 | Punching-pressing composite mould |
| CN201186326Y (en) * | 2008-05-09 | 2009-01-28 | 郭永环 | Composite punching mold |
-
2009
- 2009-12-07 CN CN2009102314290A patent/CN101780508B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB524409A (en) * | 1938-07-13 | 1940-08-06 | Armstrong Cork Co | Improvements in or relating to dies |
| CN86200507U (en) * | 1986-01-17 | 1987-02-25 | 上海重型模锻厂 | Three-way compound die device with die-forging cutting shoulder punched hole and correction |
| CN2255321Y (en) * | 1996-04-24 | 1997-06-04 | 云南变压器厂 | Three-procedure composite die for forming, flanging and hole cutting |
| CN1733384A (en) * | 2005-07-13 | 2006-02-15 | 兰州理工大学 | Punching-pressing composite mould |
| CN201186326Y (en) * | 2008-05-09 | 2009-01-28 | 郭永环 | Composite punching mold |
Non-Patent Citations (1)
| Title |
|---|
| 姬中国等.张力盘落料-拉伸-冲孔-整形复合模具设计.《模具制造》.2006,(第8期),第25-26页. * |
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| Publication number | Publication date |
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| CN101780508A (en) | 2010-07-21 |
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Address after: 266200 in the garment industrial park, Qingwei Road, Jimo City, Qingdao City, Shandong Province Patentee after: Qingdao Hailian Jinhui Auto Parts Co.,Ltd. Patentee after: Liuguoping Address before: 266200 in the garment industrial park, Qingwei Road, Jimo City, Qingdao City, Shandong Province Patentee before: QINGDAO HAILIDA STAMPING PARTS CO.,LTD. Patentee before: Liuguoping |
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| CP01 | Change in the name or title of a patent holder |