CN102240691A - Accurate extrusion mould and method of light alloy stepped workpiece - Google Patents
Accurate extrusion mould and method of light alloy stepped workpiece Download PDFInfo
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- CN102240691A CN102240691A CN2011100870608A CN201110087060A CN102240691A CN 102240691 A CN102240691 A CN 102240691A CN 2011100870608 A CN2011100870608 A CN 2011100870608A CN 201110087060 A CN201110087060 A CN 201110087060A CN 102240691 A CN102240691 A CN 102240691A
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Abstract
The invention relates to an accurate extrusion mould and method of a light alloy stepped workpiece. The accurate extrusion method of the light alloy stepped workpiece is characterized by comprising the following steps of: processing a convex crossed guide on a convex mould part and a crossed guide groove on a concave mould part, wherein the convex crossed guide is matched with the crossed guide groove; retaining the thickness of a step shape on a preformed planar blank; and filling metal into a cavity part, which is arranged on the side wall of the cuspidal edge and closed angle stepped surface of a convex mould or a concave mould and is provided with a groove used for metal flow in a vertical direction, by adopting a flow direction sequence control method so as to achieve the purpose of the formation of a cuspidal edge and closed angle step of the workpiece; and placing isopyknic blanks into the concave mould by adopting primary heating: a. prepressing by using a prepressing mandril, and b. finally forming by using the convex mould. The accurate extrusion module and method provided by the invention have the advantages of high utility ratio of materials, short manufacturing process, high accuracy and efficiency, low cost, and the like.
Description
Technical field
The invention belongs to the metallic extrusion molding technology, specifically a kind of field of light-alloy shaping more widely that is used for, dimensional accuracy height, deformation temperature be in the alloy recrystallization humidity province, the accurate extrusion die and the method for the stairstepping workpiece under the condition of the stupefied wedge angle of shape transition point.
Background technology
At present, moulding for the stairstepping workpiece, general, negative mold protruding and multi-pass extrusion molding separate unit rank by many covers, through heating for multiple times and extrusion molding, step by the one-level one-level that progressively forms rolls up ladder, operation is many, number of molds is many, especially exist to go up that the placement error that forms when the downward passage mould of passage blank is placed brings that dimensional accuracy is low, mould is often because of discontinuity, scrap in advance and cause, all there are shortcoming protruding, that the die guiding accuracy is low in forging die, extrusion die under hot conditions.Concrete deficiency and shortcoming that these prior aries exist are as follows:
1, conventional extruded shaping dies guiding mechanism has two kinds of the mould bases of snap close and band guide pillar, guide pin bushing, preceding a kind of guiding accuracy is low, big but the guiding accuracy of intensity hangs down at 0.5-2mm, extrusion die, forging press with forging die with guide pillar, guide pin bushing mould bases, precision high but can not at high temperature work, intensity is low, need guiding accuracy height, horizontal bending strength high simultaneously high temperature resistant when the shaping dies ausforming, traditional direction mechanism just can't meet the demands.
2, traditional stairstepping is adopted the multi-pass extruding, operation is many, efficient is low, the inside and outside fillet R1-R5 of stairstepping workpiece extruding, and material is prepared blank according to equal-volume, material is subjected to the three-dimensional stress effect to flow into the hole from the duct process that flows, the hole can be full of by blank material, because material through flowing into the hole turbulent flow can take place from the duct of flowing, produces folding or misrun, the hole stupefied angular shape of sidewall point is not filled, and the workpiece relevant position forms fillet after the demoulding.Simultaneously, owing to place skew, position inaccuracy, the centering process be arranged when putting into blank at every turn, time-consuming taking a lot of work, efficient is low, and the multilayer complications that are difficult to easily be shaped, stairstepping (notch cuttype list operation is many).
3, conventional extruded, the inside and outside fillet of stairstepping extruding is not less than R1～R5, and fillet is difficult to reach less than R0.5, if satisfy less than R0.5, sidewall will have the gradient of 1 °～15 ° of withdrawing patterns; If fillet should satisfy less than R0.5 inside and outside stairstepping, sidewall is the condition of straight wall, and conventional extruded technology can't be finished (radius of corner is big).
Summary of the invention
Purpose of the present invention is the deficiency that overcomes above-mentioned conventional extruded forming technique, provide a kind of can be under mass production environment, the location high accuracy, seamed edge is the isothermal extrusion die of the stairstepping light-alloy product of sharp stupefied wedge angle, and the method that once heats blank preformed and whole formed composite.
The technical solution that realizes above-mentioned purpose is:
A kind of accurate extrusion die of light-alloy stairstepping workpiece comprises punch part, die part and precompressed fuse; It is characterized in that: described punch part is provided with protruding cross guiding or cross gathering sill, and described die part is provided with the cross form guiding of cross gathering sill or projection, and protruding cross guiding matches with the cross gathering sill and locatees and guiding.
On the sidewall of the sharp stupefied wedge angle cascaded surface of the die of the punch of described punch part or die part, have the groove of the vertical direction that is used for metal flow.
A kind of accurate pressing method of light-alloy stairstepping workpiece is characterized in that: this method is as follows:
(1), is processed into protruding cross guiding or cross gathering sill on the employing punch part, on the die part, be processed into cross gathering sill or protruding cross guiding, projection cross guiding matches with the cross gathering sill, guarantees the size and the geometric accuracy of punch-die concentricity and extruding workpiece.
(2), on the blank of preformed plane; keep stairstepping thickness; adopt the method for control flow direction order; make the position, hole that has the groove of the vertical direction that is used for metal flow on the sidewall of sharp stupefied wedge angle cascaded surface of punch or die fill up metal, thereby reach the target of the sharp stupefied wedge angle joggling of workpiece.
(3), adopt once heating, the equal-volume blank is put into die, a uses the precompressed of precompressed fuse, b uses punch to be shaped eventually.
The present invention compared with prior art, under same appointed condition, for light-alloy stairstepping workpiece, use a cover composite die by using many molds to be improved to, be improved to single operation extrusion molding by the multiple operation extrusion molding, blank is reduced to once heating by heating for multiple times, to push high tolerance simultaneously, the deformation method of band surplus is improved to the extruding high accuracy, the deformation method of no surplus, make blank once go into mould in the production process, the compound pressurization of punch and core rod makes the workpiece once-forming, thereby shortened manufacturing process, reduced labour intensity, and can realize suppressing the inorganic workpiece that adds surplus.Have the stock utilization height, advantages such as manufacturing process is short, precision is high, the high and low cost of efficient.
Description of drawings
Fig. 1 is structural representation of the present invention (front view).
Fig. 2 is the integrated back of a punch cross shape guide frame and ladder punch schematic perspective view.
Fig. 3 is the punch upward view of cross shape guide frame.
Fig. 4 is the punch stairstepping cutaway view of band cross shape guide frame.
Fig. 5 is the punch stairstepping front view of band cross shape guide frame.
Fig. 6 is the die master cutaway view of band cross shape gathering sill structure.
Fig. 7 is the die vertical view of band cross shape gathering sill structure.
Fig. 8 is the mould structure front view of the stupefied wedge angle ladder of extruding workpiece Tipping Center.
Fig. 9 is the mould structure vertical view of the stupefied wedge angle ladder of extruding workpiece Tipping Center.
Figure 10 is that the present invention pushes workpiece process (precompressed of a fuse) schematic diagram.
Figure 11 is that the present invention pushes workpiece process (the b punch is shaped eventually) schematic diagram.
The specific embodiment
One, the accurate extrusion die of light-alloy stairstepping workpiece of the present invention
Fig. 1, Figure 10 and shown in Figure 11, the accurate extrusion die of light-alloy stairstepping workpiece (Fig. 1 is the matched moulds state).This mould comprises punch part 1, die part 2 and precompressed fuse 3.Described punch part 1 is made up of punch 1-1, upper padding plate 1-2 and cope match-plate pattern 1-3; Punch is connected with upper padding plate with alignment pin with bolt, and upper padding plate is connected with alignment pin by bolt with cope match-plate pattern, and cope match-plate pattern is connected by bolt with press; Between upper padding plate and cope match-plate pattern, be provided with heat insulation foam folder pad (4), be provided with heat insulation foam folder pad 4 and iron sheet 6 between cope match-plate pattern and the press.
Described die part 2 is made up of edge cover 2-2, circle stress 2-3, lower bolster 2-4 and the lower bolster 2-5 of die circle 2-1, belt type cavity; Edge is set in the die circle, at the constrained circle stress of die circle peripheral hardware, circle stress is connected with lower bolster with alignment pin with bolt, and lower bolster also links to each other with lower bolster with alignment pin with bolt, lower bolster is connected with alignment pin by bolt with forcing press, also is provided with heat insulation foam folder pad 4 between lower bolster and press.The push rod 5 of the extruding workpiece that ejects behind the die cavity internal shaping also is housed in described edge cover centre bore.
Fig. 2 is to shown in Figure 5, and punch the first half is processed into protruding cross guiding 7 or cross gathering sill 8.As Fig. 6, shown in Figure 7, cross gathering sill 7 or protruding cross guiding 6 are processed in die circle upper surface, projection cross guiding matches with the cross gathering sill and locatees and guiding, punch drives at press slide and is advanced into die down, guarantees punch-die concentricity and the size and the geometric accuracy of pushing workpiece by the cross guide frame.The projection cross guiding gap of matching with the cross gathering sill is 0.02～0.10mm.
Outside the upper padding plate of punch part with outside the die circle stress partly, be respectively equipped with the heating collar 9 of being with heater.In order to guarantee mold temperature and blank temperature in the extruding workpiece process, its mold temperature is about 500 ℃.
Fig. 8 and shown in Figure 9; the mould structure of the sharp stupefied wedge angle ladder of workpiece; it is the groove 10 (vertical direction is the extruding force direction of press) that on the sidewall of the sharp stupefied wedge angle cascaded surface of punch or die, has the vertical direction that is used for metal flow; the cross sectional shape of groove is preferably swallow tail shaped slot, and the width of rebate size m of its swallow tail shaped slot is less than bottom land width dimensions l.When the sharp stupefied wedge angle ladder of extrusion molding workpiece; punch squeezes blank material vertical inserting, blank material is flowed earlier vertically upward after, produce Radial Flow again; make the hole filling of the groove that is provided with on punch or the die full, so just guaranteed the sharp stupefied wedge angle ladder extrusion molding of workpiece 11.
The present invention is exactly on the blank of preformed plane, keeps stairstepping thickness, adopts the method for control flow direction order to reach the stupefied wedge angle of ladder point, vertical, the full target in position, hole of sidewall.
Two, the accurate pressing method of light-alloy stairstepping workpiece of the present invention
The accurate pressing method of light-alloy stairstepping workpiece of the present invention is as follows:
1, adopt punch part 1 to be processed into protruding cross guiding, be processed into the cross gathering sill on die part 2, protruding cross guiding matches with the cross gathering sill and locatees and guiding, guarantees punch-die concentricity and the size and the geometric accuracy of pushing workpiece.
2, on the blank of preformed plane; keep stairstepping thickness; adopt the method for control flow direction order; make the position, hole that has the groove of the vertical direction that is used for metal flow on the sidewall of sharp stupefied wedge angle cascaded surface of punch or die fill up metal, thereby reach the target of the sharp stupefied wedge angle joggling of workpiece.
3, adopt once heating, a mold, an extrusion molding workpiece; Concrete technology comprises: the equal-volume blank is put into die, and 3 precompressed of a precompressed fuse, the b punch is shaped eventually.
Shown in Figure 10; the precompressed of a fuse; by changing the method for the flow direction, each position sequence of flow of material; precompressed fuse under the descending contact of the punch A face B face, material forms forward extrusion to order side to flowing, and back side shape is full of; blank does not take out after the precompressed; the precompressed fuse is taken out in the punch backhaul, and punch is descending once more.To plane backward extrusion on the workpiece 11, form the sharp stupefied wedge angle stairstepping of workpiece 11 upper surfaces, the punch backhaul ejects workpiece.Shown in Figure 11, the b punch is shaped eventually.
Claims (7)
1. the accurate extrusion die of a light-alloy stairstepping workpiece comprises punch part (1), die part (2) and precompressed fuse (3); It is characterized in that: described punch part is provided with protruding cross guiding or cross gathering sill, and described die part is provided with the cross form guiding of cross gathering sill or projection, and protruding cross guiding matches with the cross gathering sill and locatees and guiding.
2. the accurate extrusion die of a kind of light-alloy stairstepping workpiece according to claim 1 is characterized in that: the cross guiding of described projection with the fit clearance of cross gathering sill is: 0.02～0.10mm.
3. the accurate extrusion die of a kind of light-alloy stairstepping workpiece according to claim 1 is characterized in that: the groove (10) that has the vertical direction that is used for metal flow on the sidewall of the sharp stupefied wedge angle cascaded surface of the die of the punch of described punch part (1) or die part (2).
4. the accurate extrusion die of a kind of light-alloy stairstepping workpiece according to claim 3 is characterized in that: the described cross sectional shape that is used for the groove (10) of the vertical direction of metal flow is a swallow tail shaped slot.
5. the accurate extrusion die of a kind of light-alloy stairstepping workpiece according to claim 1 is characterized in that: described punch part is made up of with cope match-plate pattern (1-3) punch (1-1), upper padding plate (1-2); Punch is connected with upper padding plate with alignment pin with bolt, and upper padding plate is connected with alignment pin by bolt with cope match-plate pattern, and cope match-plate pattern is connected with alignment pin by bolt with press; Between upper padding plate and cope match-plate pattern, be provided with heat insulation foam folder pad (4), be provided with heat insulation foam folder pad (4) and iron sheet (6) between cope match-plate pattern and the press; Described die part is made up of with lower bolster (2-5) edge cover (2-2), circle stress (2-3), the lower bolster (2-4) of die circle (2-1), belt type cavity; Edge is set in the die circle, at the constrained circle stress of die circle peripheral hardware, circle stress is connected with lower bolster with alignment pin with bolt, and lower bolster also links to each other with lower bolster with alignment pin with bolt, and lower bolster is connected by bolt with forcing press, also is provided with heat insulation foam folder pad between lower bolster and press; The push rod (5) of the extruding workpiece that ejects behind the die cavity internal shaping also is housed in described edge cover centre bore.
6. the accurate extrusion die of a kind of light-alloy stairstepping workpiece according to claim 1 is characterized in that: be respectively equipped with the heating collar (9) of being with heater outside the upper padding plate of described punch part with outside the die circle stress partly.
7. the accurate pressing method of a light-alloy stairstepping workpiece, it is characterized in that: this method is as follows:
(1), first is processed into protruding cross guiding to adopt punch part (1), is processed into the cross gathering sill on die part (2), protruding cross guiding matches with the cross gathering sill, guarantees punch-die concentricity and the size and the geometric accuracy of pushing workpiece (11);
(2), on the blank of preformed plane, keep stairstepping thickness, adopt the method for control flow direction order, make the position, hole that has the groove of the vertical direction that is used for metal flow on the sidewall of sharp stupefied wedge angle cascaded surface of punch or die fill up metal, thereby reach the target of the sharp stupefied wedge angle joggling of workpiece;
(3), adopt once heating, the equal-volume blank is put into die, a uses precompressed fuse (3) precompressed, b uses punch to be shaped eventually.
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| CN2011100870608A CN102240691A (en) | 2011-03-31 | 2011-03-31 | Accurate extrusion mould and method of light alloy stepped workpiece |
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| CN2011100870608A CN102240691A (en) | 2011-03-31 | 2011-03-31 | Accurate extrusion mould and method of light alloy stepped workpiece |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699213A (en) * | 2012-06-21 | 2012-10-03 | 宁波市鄞州剑均机械科技有限公司 | Hot stamping mold of copper piece |
| CN102699094A (en) * | 2012-06-29 | 2012-10-03 | 中北大学 | Die used in extrusion moulding of high-precision complex copper alloy thrust bearing seat |
| CN103817324A (en) * | 2014-01-22 | 2014-05-28 | 中国兵器工业第五二研究所 | Method for proportional compression and densification of Al-Si encapsulating material |
| CN103878196A (en) * | 2014-01-14 | 2014-06-25 | 中北大学 | Rotary extrusion method of homogenous high-toughness magnesium alloy cup-shaped component |
| CN105880308A (en) * | 2016-05-13 | 2016-08-24 | 河南平高电力设备有限公司 | Two-time extruding die of moving contact and secondary-extruding die thereof |
| CN106216472A (en) * | 2016-06-30 | 2016-12-14 | 中北大学 | A kind of umbellate form housing member warm-extrusion forming method |
| CN107626760A (en) * | 2017-09-13 | 2018-01-26 | 中北大学 | A kind of large-scale band lug magnesium alloy component manufacturing process |
| CN108421838A (en) * | 2018-04-09 | 2018-08-21 | 南京坚固高中压阀门制造有限公司 | High pressure welding ball valve valve stem sleeve disposal molding mold |
| CN111673397A (en) * | 2020-04-30 | 2020-09-18 | 中国航发南方工业有限公司 | Forming process of wide chord hollow blade |
| CN111940605A (en) * | 2020-08-04 | 2020-11-17 | 重庆赛力格柯网络科技有限公司 | New energy automobile battery box top cap shaping structure |
| CN113084006A (en) * | 2021-04-02 | 2021-07-09 | 中北大学 | Step-by-step extrusion die capable of effectively reducing box forming load |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699213A (en) * | 2012-06-21 | 2012-10-03 | 宁波市鄞州剑均机械科技有限公司 | Hot stamping mold of copper piece |
| CN102699094A (en) * | 2012-06-29 | 2012-10-03 | 中北大学 | Die used in extrusion moulding of high-precision complex copper alloy thrust bearing seat |
| CN102699094B (en) * | 2012-06-29 | 2014-12-24 | 中北大学 | Die used in extrusion moulding of high-precision complex copper alloy thrust bearing seat |
| CN103878196A (en) * | 2014-01-14 | 2014-06-25 | 中北大学 | Rotary extrusion method of homogenous high-toughness magnesium alloy cup-shaped component |
| CN103878196B (en) * | 2014-01-14 | 2015-12-02 | 中北大学 | A kind of homogeneous high Strengthening and Toughening magnesium alloy cup-shape member rotary squeezing method |
| CN103817324A (en) * | 2014-01-22 | 2014-05-28 | 中国兵器工业第五二研究所 | Method for proportional compression and densification of Al-Si encapsulating material |
| CN105880308A (en) * | 2016-05-13 | 2016-08-24 | 河南平高电力设备有限公司 | Two-time extruding die of moving contact and secondary-extruding die thereof |
| CN106216472A (en) * | 2016-06-30 | 2016-12-14 | 中北大学 | A kind of umbellate form housing member warm-extrusion forming method |
| CN107626760A (en) * | 2017-09-13 | 2018-01-26 | 中北大学 | A kind of large-scale band lug magnesium alloy component manufacturing process |
| CN107626760B (en) * | 2017-09-13 | 2019-05-03 | 中北大学 | A kind of large-scale band lug magnesium alloy component manufacturing process |
| CN108421838A (en) * | 2018-04-09 | 2018-08-21 | 南京坚固高中压阀门制造有限公司 | High pressure welding ball valve valve stem sleeve disposal molding mold |
| CN111673397A (en) * | 2020-04-30 | 2020-09-18 | 中国航发南方工业有限公司 | Forming process of wide chord hollow blade |
| CN111940605A (en) * | 2020-08-04 | 2020-11-17 | 重庆赛力格柯网络科技有限公司 | New energy automobile battery box top cap shaping structure |
| CN113084006A (en) * | 2021-04-02 | 2021-07-09 | 中北大学 | Step-by-step extrusion die capable of effectively reducing box forming load |
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Application publication date: 20111116 |