CN105855311B - A kind of method for eliminating the recessed Magen David cold-extruded cracking in energy accumulator housing bottom - Google Patents
A kind of method for eliminating the recessed Magen David cold-extruded cracking in energy accumulator housing bottom Download PDFInfo
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- CN105855311B CN105855311B CN201610270713.9A CN201610270713A CN105855311B CN 105855311 B CN105855311 B CN 105855311B CN 201610270713 A CN201610270713 A CN 201610270713A CN 105855311 B CN105855311 B CN 105855311B
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- energy accumulator
- accumulator housing
- magen david
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/20—Making uncoated products by backward extrusion
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Abstract
The invention discloses a kind of method for eliminating the recessed Magen David cold-extruded cracking in energy accumulator housing bottom, including cavity shape, the recessed Magen David cold extrusion technology step of finishing energy accumulator housing lateral wall and energy accumulator housing bottom inside backward extrusion energy accumulator housing, inside backward extrusion energy accumulator housing in die cavity shape process step, the recessed frustum cone structure in preform energy accumulator housing bottom, the gradient β of recessed round platform2With the recessed Magen David entrance gradient β in finished product energy accumulator housing bottom1It is consistent, recessed frustum cone height L2With the recessed Magen David entrance hypotenuse height L in finished product energy accumulator housing bottom1It is consistent.This method can eliminate the phenomenon to be ftractureed during the recessed Magen David cold extrusion in final bottom；Material can be completely filled with die cavity in final swaging process after making preform simultaneously；The deformation extent of preformed workpiece bottom is more uniform, significantly reduces the recessed Magen David sidewall damage value in workpiece bottom after shaping eventually, improves product quality.
Description
Technical field
The present invention relates to a kind of method of the recessed Magen David cold forming in energy accumulator housing bottom, to solve the bottom after cold-extruded terminates
The problem of Cracking that the recessed Magen David inscribed circle drift angle side wall in portion occurs, belongs to the cold warm-extrusion forming technical field of metal material.
Background technology
Energy accumulator housing is the important auxiliary in hydraulic system, is that one kind can be stored in hydraulic pressure in pressure vessel, waits to need
The energy accumulating device discharged when wanting, is mainly used in automatic transmission, at the recessed Magen David in product bottom with it is outside
Part connects, and it is β to bear compared with big load, the recessed Magen David entrance gradient in finished product energy accumulator housing bottom1, entrance hypotenuse is highly L1。
The product typically uses relatively advanced cold temperature combined forming process to substitute traditional hot forging and cutting to add at present
Work technique is produced.After round bar is heated to 850 DEG C by cold temperature combined forming process first, first time extrusion molding is carried out,
The interiors of products cavity shape such as Fig. 1 (a) is obtained, forms the boss bevel angle α of die cavity inside energy accumulator housing1With boss upper surface
Diameter d1；Then the annealed and lateral wall of phosphorus saponification process, at normal temperatures finishing energy accumulator housing, such as Fig. 1 (b)；It is finally right
Product carries out the recessed Magen David cold-extrusion shaping in bottom, as shown in Fig. 1 (c).In the recessed Magen David swaging process in bottom, in recessed hexagonal
Drift angle side wall produces transversal crack often at star inscribed circle, causes percent defective to be up to 20%-30%, have a strong impact on product quality and
Yield rate.Therefore, the above-mentioned process program of energy accumulator housing product is improved and optimized, eliminate the recessed Magen David cold-extruded in bottom
The cracking phenomena of shaping, it is significant for the quality and yield rate of raising energy accumulator housing product warm and cold combined deformation.
The content of the invention
When the present invention is changed to warm and cold combined deformation technique for energy accumulator housing product by hot forging and machining, in cold-extruded
The problem of drift angle side wall transversal crack occurs and influences product quality at inscribed circle during the recessed Magen David in bottom, propose that one kind can disappear
Except the method for the recessed Magen David cold-extruded cracking in energy accumulator housing bottom.
The present invention is achieved by the following technical solution：
A kind of method for eliminating the recessed Magen David cold-extruded cracking in energy accumulator housing bottom, including backward extrusion energy accumulator housing
Internal cavity shape, the recessed Magen David cold extrusion technology step of finishing energy accumulator housing lateral wall and energy accumulator housing bottom,
Inside backward extrusion energy accumulator housing in die cavity shape process step, the recessed frustum cone structure in preform energy accumulator housing bottom, and
And the recessed frustum cone structure in energy accumulator housing bottom meets：The gradient β of recessed round platform2With the recessed Magen David entrance in finished product energy accumulator housing bottom
Gradient β1It is consistent, recessed frustum cone height L2With the recessed Magen David entrance hypotenuse height L in finished product energy accumulator housing bottom1It is consistent.
Inside backward extrusion energy accumulator housing in die cavity shape process step, the convex of energy accumulator housing inside die cavity is formed
Platform bevel angle α2For 3-7 °, boss upper surface diameter d2For 10.10-10.60mm.
The boss bevel angle α of die cavity inside described energy accumulator housing2For 5 °.
The boss upper surface diameter d of die cavity inside described energy accumulator housing2For 10.35mm.
The present invention is recessed to energy accumulator housing bottom in die cavity shape process step inside backward extrusion energy accumulator housing
Magen David region carries out the pre-forming design of recessed truncated conical shape, while changes die cavity inside existing backward extrusion energy accumulator housing
Projection shape on the inside of cylinder bottom in shape process step, and volume is equal after ensureing the region material before being deformed.According to final cold
The shape of the recessed Magen David in bottom is extruded, devises the shape of the recessed recessed round platform of Magen David region preform in bottom in backward extrusion process,
Make the gradient β of recessed round platform2With the recessed Magen David entrance gradient β in final bottom1It is consistent, recessed frustum cone height L2It is recessed with final bottom
Magen David entrance hypotenuse height L1It is consistent.To ensure the region material, rear volume is equal before being deformed simultaneously, in boss height
Spend it is constant on the premise of, change boss bevel angle α on the inside of existing cylinder bottom1For α2, change boss upper surface diameter d1For d2。
On the one hand the present invention passes through backward extrusion on the basis of the former cold temperature combined forming process scheme of energy accumulator housing
The preform of recessed truncated conical shape is carried out in the recessed Magen David region in bottom in die cavity shape process step inside energy accumulator housing, is eliminated
The phenomenon to be ftractureed during the recessed Magen David cold extrusion in final bottom；On the other hand, die cavity inside backward extrusion energy accumulator housing is passed through
Material is in the recessed Magen David in energy accumulator housing bottom after design in shape process step to boss oblique angle on the inside of cylinder bottom makes preform
Die cavity can be completely filled with cold extrusion technology step.Involved mould structure is relatively simple, easy to process, preform
The deformation extent of workpiece bottom is more uniform, reduces the impairment value of the recessed Magen David side wall shaping in workpiece bottom after shaping eventually, solution
The crackle quality problems occurred at this in former technique of having determined.
The present invention has the advantages that compared with prior art：
When the present invention carries out the recessed Magen David cold extrusion technology step in energy accumulator housing bottom, due in backward extrusion
The workpiece bottom recessed round platform of preform in die cavity shape process step inside energy accumulator housing, reduce the material in the region
Flow distance, stress concentration phenomenon is avoided, recessed Magen David sidewall damage value is substantially reduced, and eliminates recessed Magen David inscribe dome
The phenomenon that side wall ftractures at angle, ensure that yield rate.
Compared with existing process scheme, the present invention solves recessed Magen David cold-extruded cracking quality problems, improves product
Quality, simultaneously because metal flow deformation is uniform during shaping, stress concentration is avoided, also improves performance and the mould longevity of product
Life.
Brief description of the drawings
Fig. 1 is three kinds of workpiece after backward extrusion, cold-finishing and the recessed Magen David of cold-extruded in the cold temperature combined forming process of prior art
Structural representation；
Fig. 2 is the structural representation of workpiece after die cavity shape process step inside backward extrusion energy accumulator housing of the present invention
Figure；
Fig. 3 is the backward extrusion installation diagram of die cavity shape process step inside backward extrusion energy accumulator housing of the present invention, is schemed
Middle sequence number：1st, it is counter to squeeze into punch-pin, 2, back extrusion concave, 3, it is anti-squeeze before workpiece, 4, it is anti-squeeze after workpiece, 5, counter force down punch-pin；
Fig. 4 is the structural representation of workpiece after finishing energy accumulator housing lateral wall processing step of the present invention；
Fig. 5 is the cold-extruded indentation Magen David dress of the recessed Magen David cold extrusion technology step in energy accumulator housing bottom of the present invention
Figure, sequence number in figure：1st, cold-extruded upper male mould, 2, workpiece before cold-extruded, 3, workpiece after cold-extruded, 4, cold extrusion female die, 5, cold-extruded Magen David
Lower punch.
Embodiment
Technical scheme is described in further detail by way of example and in conjunction with the accompanying drawings.
Embodiment：Referring to shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, it is cold that one kind eliminates the recessed Magen David in energy accumulator housing bottom
Squeeze cavity shape, finishing energy accumulator housing lateral wall and accumulation of energy inside the method split, including backward extrusion energy accumulator housing
The recessed Magen David cold extrusion technology step of device outer casing bottom, backward extrusion energy accumulator housing inside die cavity shape process step
In, the recessed frustum cone structure in preform energy accumulator housing bottom, and the recessed frustum cone structure in energy accumulator housing bottom meets：Recessed round platform it is oblique
Spend β2With the recessed Magen David entrance gradient β in finished product energy accumulator housing bottom1It is consistent, recessed frustum cone height L2With outside finished product accumulator
The recessed Magen David entrance hypotenuse height L in shell bottom1It is consistent.Change cylinder bottom inner side boss shape in existing backward extrusion process simultaneously
Shape, the equal condition of volume after can meeting the regional area material before being deformed, and ensure to be full of shaping during recessed Magen David cold extrusion,
Change boss bevel angle α on the inside of existing cylinder bottom1For α2, change the upper surface diameter d of boss1For d2, boss oblique angle and boss diameter shadow
The filling of male bottom shape when ringing cold extrusion forming；The die cavity shape process step inside backward extrusion energy accumulator housing
In, the boss bevel angle α of formation energy accumulator housing inside die cavity on the premise of boss height is constant2With boss upper surface diameter d2, it is convex
Platform bevel angle α2For 5 °, boss upper surface diameter d2For 10.35mm.Fig. 3 is die cavity inside backward extrusion energy accumulator housing of the present invention
The backward extrusion installation diagram of shape process step, round bar is heated to 850 DEG C, is put into indirect-extrusion mould die cavity, workpiece bottom
Recessed round platform shapes simultaneously with projection shape on the inside of cylinder bottom in die cavity shape process step inside backward extrusion energy accumulator housing,
Boss bevel angle α on the inside of cylinder bottom2And boss upper surface diameter d2It ensure that the convex mold cavity of cold-extruded is full of, boss bevel angle α2For 5 °, it is convex
Platform upper surface diameter d2For 10.35mm；To avoid because pre- in die cavity shape process step inside backward extrusion energy accumulator housing
The recessed truncated conical shape design of contoured bottom is unreasonable and causes in the recessed Magen David cold extrusion technology step in energy accumulator housing bottom
The defects of cold-extruded folds when pressing Magen David, the gradient β of recessed round platform2With the recessed Magen David entrance in finished product energy accumulator housing bottom
Gradient β1It is consistent, recessed frustum cone height L2With the recessed Magen David entrance hypotenuse height L in finished product energy accumulator housing bottom1It is consistent；
The annealed afterwards and lateral wall of phosphorus saponification process, at normal temperatures finishing energy accumulator housing, cold-finishing terminate rear workpiece shapes such as
Shown in Fig. 4；Finally carry out the recessed Magen David cold extrusion technology step in energy accumulator housing bottom, interior Magen David swaging process assembling
Figure is as shown in Figure 5.
When the present invention carries out the recessed Magen David cold extrusion technology step in energy accumulator housing bottom, due in backward extrusion
The workpiece bottom recessed round platform of preform in die cavity shape process step inside energy accumulator housing, reduce the material in the region
Flow distance, stress concentration phenomenon is avoided, recessed Magen David sidewall damage value is substantially reduced, and eliminates recessed Magen David inscribe dome
The phenomenon that side wall ftractures at angle, ensure that yield rate.
Compared with existing process scheme, the present invention solves recessed Magen David cold-extruded cracking quality problems, improves product
Quality, simultaneously because metal flow deformation is uniform during shaping, stress concentration is avoided, also improves performance and the mould longevity of product
Life.
Embodiment does not form the limit to the scope of the present invention only to facilitate understand technical scheme
System, it is every without departing from any letter perhaps made in technical solution of the present invention according to the technical spirit of the present invention to above scheme
Single modification, equivalent variations and modification, still fall within the scope of the present invention.
Claims (4)
1. a kind of method for eliminating the recessed Magen David cold-extruded cracking in energy accumulator housing bottom, including in backward extrusion energy accumulator housing
Portion's cavity shape, the recessed Magen David cold extrusion technology step of finishing energy accumulator housing lateral wall and energy accumulator housing bottom, its
It is characterised by：Inside backward extrusion energy accumulator housing in die cavity shape process step, the recessed circle in preform energy accumulator housing bottom
Platform structure, and the recessed frustum cone structure in energy accumulator housing bottom meets：The gradient β of recessed round platform2It is recessed with finished product energy accumulator housing bottom
Magen David entrance gradient β1It is consistent, recessed frustum cone height L2Magen David entrance hypotenuse height recessed with finished product energy accumulator housing bottom
L1It is consistent.
2. the method according to claim 1 for eliminating the recessed Magen David cold-extruded cracking in energy accumulator housing bottom, it is characterised in that：
Inside backward extrusion energy accumulator housing in die cavity shape process step, the boss bevel angle α of die cavity inside energy accumulator housing is formed2
For 3-7 °, boss upper surface diameter d2For 10.10-10.60mm.
3. the method according to claim 2 for eliminating the recessed Magen David cold-extruded cracking in energy accumulator housing bottom, it is characterised in that：
The boss bevel angle α of die cavity inside described energy accumulator housing2For 5 °.
4. the method according to claim 2 for eliminating the recessed Magen David cold-extruded cracking in energy accumulator housing bottom, it is characterised in that：
The boss upper surface diameter d of die cavity inside described energy accumulator housing2For 10.35mm.
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| CN201610270713.9A CN105855311B (en) | 2016-04-27 | 2016-04-27 | A kind of method for eliminating the recessed Magen David cold-extruded cracking in energy accumulator housing bottom |
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| CN201610270713.9A CN105855311B (en) | 2016-04-27 | 2016-04-27 | A kind of method for eliminating the recessed Magen David cold-extruded cracking in energy accumulator housing bottom |
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| CN105855311B true CN105855311B (en) | 2018-01-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111451393A (en) * | 2020-03-20 | 2020-07-28 | 苏州辉图精密工业有限公司 | Nitrogen spring stamping process |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106881366B (en) * | 2017-01-23 | 2018-11-27 | 江苏创一精锻有限公司 | A kind of accumulator tank body forging cold-forging forming technique and anti-extruding mold |
| CN116511391B (en) * | 2023-03-13 | 2023-11-10 | 中北大学 | Extrusion forming method of conical cabin with end frames at two ends |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201783610U (en) * | 2010-09-10 | 2011-04-06 | 江苏威鹰机械有限公司 | Cold extrusion female die for housing of accumulator |
| CN201783609U (en) * | 2010-09-10 | 2011-04-06 | 江苏威鹰机械有限公司 | Energy accumulator housing backward-extrusion female die |
| CN201832860U (en) * | 2010-09-10 | 2011-05-18 | 江苏威鹰机械有限公司 | Closed end blind hole cold extrusion forming die of energy accumulator shell |
| CN102397964A (en) * | 2010-09-10 | 2012-04-04 | 江苏威鹰机械有限公司 | Energy accumulator shell forging process |
| CN102935578A (en) * | 2012-10-18 | 2013-02-20 | 江苏大学 | Method for manufacturing local boss nut plate by high-intensity biphase steel plate |
| CN103521668A (en) * | 2013-07-30 | 2014-01-22 | 中北大学 | Method for extrusion forming of high-strength complex aluminum alloy special-shaped outer hexagon seat metal plate |
| CN104588426A (en) * | 2015-01-14 | 2015-05-06 | 江苏创一精锻有限公司 | Energy accumulator tank forging forming process and extrusion die |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6422434A (en) * | 1987-07-17 | 1989-01-25 | Toyota Motor Corp | Punching method simultaneously with forming |
-
2016
- 2016-04-27 CN CN201610270713.9A patent/CN105855311B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201783610U (en) * | 2010-09-10 | 2011-04-06 | 江苏威鹰机械有限公司 | Cold extrusion female die for housing of accumulator |
| CN201783609U (en) * | 2010-09-10 | 2011-04-06 | 江苏威鹰机械有限公司 | Energy accumulator housing backward-extrusion female die |
| CN201832860U (en) * | 2010-09-10 | 2011-05-18 | 江苏威鹰机械有限公司 | Closed end blind hole cold extrusion forming die of energy accumulator shell |
| CN102397964A (en) * | 2010-09-10 | 2012-04-04 | 江苏威鹰机械有限公司 | Energy accumulator shell forging process |
| CN102935578A (en) * | 2012-10-18 | 2013-02-20 | 江苏大学 | Method for manufacturing local boss nut plate by high-intensity biphase steel plate |
| CN103521668A (en) * | 2013-07-30 | 2014-01-22 | 中北大学 | Method for extrusion forming of high-strength complex aluminum alloy special-shaped outer hexagon seat metal plate |
| CN104588426A (en) * | 2015-01-14 | 2015-05-06 | 江苏创一精锻有限公司 | Energy accumulator tank forging forming process and extrusion die |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111451393A (en) * | 2020-03-20 | 2020-07-28 | 苏州辉图精密工业有限公司 | Nitrogen spring stamping process |
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