CN103537500A - Extrusion and molding method for cup-shaped part and special extrusion die - Google Patents
Extrusion and molding method for cup-shaped part and special extrusion die Download PDFInfo
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- CN103537500A CN103537500A CN201310506188.2A CN201310506188A CN103537500A CN 103537500 A CN103537500 A CN 103537500A CN 201310506188 A CN201310506188 A CN 201310506188A CN 103537500 A CN103537500 A CN 103537500A
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Abstract
The invention relates to an extrusion and molding method for a cup-shaped part and a special extrusion die. The extrusion and molding method comprises the following steps that (1) a blank to be extruded is put into a concave die, wherein the extrusion die comprises an inner convex die; an outer convex die is sleeved outside the inner convex die; the outer convex die is in guided sliding fit with the inner convex die; a pressure machine is provided with a power output shaft which is correspondingly connected with the outer convex die and the inner convex die; a corresponding output shaft of the pressure machine drives the inner convex die which is in transmission connection with the pressure machine to downwards extrude the blank; the inner convex die is moved downwards to the thickness of the needed part; (2) the lower end of the inner convex die is ejected against the blank to keep still; the output shaft on which the pressure machine and the outer convex die are in the transmission connection drives the outer convex die to slide downwards along the outer periphery of the inner convex die to extrude the blank to form the needed cup-shaped part; (3) after the extrusion is finished, the pressure machine drives the inner convex die and the outer convex die to return so as to eject the molded part. According to the extrusion and molding method for the cup-shaped part and the special extrusion die, the inner convex die and the outer convex die are extruded in sequence; the single-time extrusion area is small and the tonnage of extrusion equipment can be reduced so that the production cost is reduced.
Description
Technical field
The present invention relates to metal material extrusion forming technology field, relate in particular to a kind of cup shell extrusion forming method and particular manufacturing craft.
Background technology
When extrusion molding, when material one timing of extrusion molding blank, extruding force is mainly relevant with deformation degree of extrusion with extruding projected area.For the extrusion molding of super-large diameter (thin-walled) thin-walled cup shell, because squish area is larger, if adopt extrusion molding of single action hydraulic press, extruding force is larger, and the tonnage of simultaneously required former is large, and equipment investment cost is high.
Summary of the invention
the object of the invention is to propose repeatedly extrusion forming method of cup shell that a kind of single extrusion power is little.The present invention also provides a kind of extrusion die of implementing said method that is exclusively used in.
for addressing the above problem, the technical scheme that in the present invention, a kind of cup shell extrusion forming method adopts is:
An extrusion forming method, is characterized in that: comprises the following steps,
1) blank to be extruded is put into the die of the mold for extruding and forming of installing on forcing press, mold for extruding and forming comprises interior punch, interior punch overcoat is provided with outer punch, outer punch and interior punch guiding are slidably matched, forcing press has and the outer punch power output shaft that be connected corresponding to interior punch, the corresponding output shaft of forcing press drives the descending extrusion billet of interior punch being in transmission connection with it, and interior punch continues to come downwards to the thickness that the distance between the die cavity diapire of interior punch lower end and die is required part;
2) top, interior punch lower end is pressed on blank and keeps motionless, and the output shaft that forcing press and outer punch are in transmission connection drives outer punch along interior punch outer peripheral face guiding down sliding extrusion billet, squeezes out required cup shell;
3) pushed, in forcing press drives, punch, outer punch backhaul, eject formation of parts.
above-mentioned steps 2) after having pushed, if the diameter of the cavity of the part being shaped does not arrive required part requirement, punch and outer punch in changing, make the diameter of punch in new after changing equal the external diameter of the outermost outer punch of preorder extruding, repeat above-mentioned steps 2), until the required cup shell squeezing out.
in above-mentioned steps 3) in, first make the output shaft that forcing press and outer punch be in transmission connection drive outer punch backhaul, and then the output shaft being in transmission connection with interior punch that makes forcing press drive interior punch backhaul.
described forcing press is the double action hydraulic press with inner side cylinder body driving mechanism and outside cylinder body driving mechanism, inner side cylinder body driving mechanism and the described interior punch of described double action hydraulic press are in transmission connection, and outside cylinder body driving mechanism and the described outer punch of described double action hydraulic press are in transmission connection.
the technical scheme that is exclusively used in the mold for extruding and forming employing of implementing said method in the present invention is:
be exclusively used in the extrusion die of implementing above-mentioned cup shell extrusion forming method, comprise punch and die, described punch comprises interior punch, and described interior punch overcoat is provided with outer punch, and described outer punch and interior punch guiding are slidably matched.
Also comprise from top to bottom the upper bolster of releasable connection, upper padding plate and punch retainer successively, described outer punch is fixedly connected with described punch retainer, on described upper bolster, upper padding plate and punch retainer, offer that extend, that be interconnected along the vertical direction installing hole, described interior punch is installed in described installing hole.
A kind of cup shell extrusion forming method that the present invention proposes, during extrusion molding, blank is put into die, and the corresponding output shaft of forcing press drives interior punch and outer punch extrusion billet successively, between interior punch and outer punch, leads and is slidably matched, in adopting, punch and outer punch divide order extrusion molding, single extrusion area is little, so single extrusion power reduces, thereby can adopt the equipment extrusion molding cup shell that tonnage is less, reduced equipment investment cost, reduced production costs.
Accompanying drawing explanation
Fig. 1 is the structural representation of state one of the embodiment of a kind of cup shell mold for extruding and forming of the present invention;
Fig. 2 is the structural representation of state two of the embodiment of a kind of cup shell mold for extruding and forming of the present invention;
Fig. 3 is the structural representation of state three of the embodiment of a kind of cup shell mold for extruding and forming of the present invention;
Fig. 4 is blahk structure schematic diagram to be extruded;
Fig. 5 is the structural representation of an order extruding postforming part;
Fig. 6 is the structural representation of two order extruding postforming parts;
Fig. 7 is the structural representation of the final required part being shaped.
The specific embodiment
The embodiment of a kind of cup shell extrusion forming method of the present invention: as shown in FIG. 1 to 3, this pressing method comprises the following steps, 1) diameter is D as shown in Figure 4
0, be highly h
0blank put into the die of the mold for extruding and forming of installing on double action hydraulic press, double action hydraulic press has outside cylinder body and two clutch ends of inner side cylinder body, mold for extruding and forming comprises interior punch 6-1, interior punch overcoat is provided with an outer punch 5-1, outer punch 5-1 and interior punch guiding are slidably matched, the outside cylinder body of outer punch 5-1 and double action hydraulic press is in transmission connection, the inner side cylinder body of interior punch 6-1 and double action hydraulic press is in transmission connection, start double action hydraulic press, the inner cylinder body action of double action hydraulic press also drives the descending extrusion billet of interior punch 6-1 that output shaft is in transmission connection with it, as shown in Figure 1, metal upwards flows along between the inwall of the cavity of interior punch 6-1 periphery wall and die under the squeezing action of interior punch 6-1, interior punch 6-1 continues to come downwards to the part squeezing out as shown in Figure 5, this part cavity diameter D
1with interior punch 6-1 equal diameters, bottom wall thickness be b, highly for h
1, 2) keep interior punch 6-1 top to be pressed on blank motionless, the outside cylinder body of double action hydraulic press moves and drives the outer punch 5-1 that output shaft is in transmission connection with it descending, outer punch continues extrusion billet along interior punch periphery wall guiding down sliding, as shown in Figure 2, metal upwards flows under the squeezing action of punch 5-1 outside, outer punch 5-1 comes downwards to the part squeezing out as shown in Figure 6, and this part cavity diameter D2 equates with the external diameter of outer punch 5-1, bottom wall thickness is b, highly for h2, 3) change interior punch 6-1 and outer punch 5-1, make new in the diameter and step 2 of punch 6-2) at home and abroad the external diameter of punch 5-1 equate, new outer punch 5-2 is fixedly connected with punch retainer 7, in new, punch 6-2 guiding is slided and is installed in the centre bore of new outer punch 5-2, start double action hydraulic press, the inner side cylinder body of double action hydraulic press drives the descending and top of punch 6-2 in new that output is with it in transmission connection to be pressed in step 2) on the diapire of the cup shell that squeezes out, and keep new interior punch 6-2 motionless, repeating step 2), make outside cylinder body drive the new descending extruding of outer punch 5-2 being in transmission connection with it, as shown in Figure 3, until squeeze out required part as shown in Figure 7, the diameter D of this required part equates with the external diameter of new outer punch 5-2, bottom wall thickness is b, be highly h, 4) pushed, for preventing that the cup shell of extrusion molding from sticking on the outer peripheral face of outer punch, first make the outside cylinder body action of double action hydraulic press drive outer punch backhaul, then the inner side cylinder body of double action hydraulic press drives interior punch backhaul, the lower cylinder body action of double action hydraulic press, drive the push rod 11 being connected with the output of lower cylinder body up, eject the cup shell of extrusion molding.
Cup shell is in the present embodiment by three order extrusion moldings, therefore in needing to change, punch and outer punch continue extrusion molding, if the part of shaping to be extruded in other embodiments of the invention can twice extrusion molding, can above-mentioned steps 3 be set according to actual conditions) yet; Same, if drip molding to be extruded need to pass through above extrusion moldings three times,, as long as since the 3rd order extruding, change each time once interior punch and outer punch, make the interior convex mould diameter of every order equal the outer convex mould diameter in last order.
In the present embodiment for to prevent that the cup shell of extrusion molding from sticking on the outer peripheral face of outer punch; after having pushed; first make the outside cylinder body of double action hydraulic press drive outer punch backhaul; then make the inner side cylinder body of double action hydraulic press drive interior punch backhaul; in other embodiments of the invention; also can make inner side cylinder body and the outside cylinder body of double action hydraulic press move, punch and the backhaul simultaneously of outer punch in driving respectively simultaneously.
The embodiment of a kind of cup shell mold for extruding and forming of the present invention: as shown in 1～Fig. 3, this mold for extruding and forming comprises part of the upper die and part of the lower die, part of the upper die comprises the upper bolster 9 that the output for the outside cylinder body with double action hydraulic press is connected, upper bolster 9 lower end releasable connections have upper padding plate 8, upper padding plate 8 belows are connected with punch retainer 7, also comprise punch, punch comprises interior punch 6-1, interior punch 6-1 is arranged with an outer punch 5-1 outward, outer punch 5-1 is fixedly connected with punch retainer 7, on outer punch 5-1, offer along its axially extended centre bore, on upper bolster 9 and upper padding plate 8, all offer the installing hole being communicated with the centre bore of outer punch 5-1, interior punch 6-1 stretches out upper end upper bolster 9 and is in transmission connection for the output of the inner side cylinder body with double action hydraulic press, punch 6-1 action in inner side cylinder body drives, outside cylinder body drives outer punch 5-1 action, interior punch 6-1 and outer punch 5-1 guiding are slidably matched, part of the lower die comprises the die shoe 1 of bottom, on die shoe 1, be provided with lower bolster 2, on lower bolster 2, be provided with die assembly, die assembly comprises die 4 and is set in the outer field die retainer plate 3 of die 4, the diapire of die cavity is provided with the cushion block 10 that can move up and down along the mould intracavity wall of die, on die shoe 1 and lower bolster 2, offer for installing the jogger hole of push rod 11, push rod 11 is installed in jogger hole, and push rod 11 tops, upper end are pressed in cushion block 10 bottoms, lower end for being in transmission connection with the output that ejects cylinder body of double action hydraulic press.
The present embodiment is mainly that the above-mentioned mold for extruding and forming of employing is D by diameter as shown in Figure 4
0, be highly h
0blank be squeezed into cup shell as shown in Figure 7, the external diameter of this cup shell is D
0, internal diameter is for b, highly be h after D, diapire; Owing to adopting, once to push the required extruding force of this cup shell larger, need to adopt large-tonnage equipment, high cost; Adopt this mold for extruding and forming can minute order extrusion molding, single extrusion power be little, can reduce the tonnage of used equipment.Adopt this extrusion die to be divided into the required cup shell of three order extrusion moldings, comprise the following steps: 1) blank is as shown in Figure 4 put in die, start double action hydraulic press, the inner cylinder body action of double action hydraulic press drives the descending extrusion billet of interior punch 6-1 that output shaft is in transmission connection with it, metal upwards flows along between the inwall of the cavity of interior punch 6-1 periphery wall and die under the squeezing action of interior punch 6-1, interior punch 6-1 continues to come downwards to the part squeezing out as shown in Figure 5, the cavity diameter D1 of the part of extrusion molding and interior punch 6-1 equal diameters, bottom wall thickness is b, be highly h1, 2) keep interior punch 6-1 top to be pressed on blank motionless, the outside cylinder body action of double action hydraulic press drives the outer punch 5-1 that output is in transmission connection with it descending, outer punch continues extrusion billet along interior punch periphery wall guiding down sliding, metal outside under the squeezing action of punch 5-1 along upwards flowing between interior punch 6-1 periphery wall die cavity inner wall, outer punch 5-1 comes downwards to the part squeezing out as shown in Figure 6, the part cavity diameter D of extrusion molding
2equate with the external diameter of outer punch 5-1, bottom wall thickness is b, highly for h
2, 3) because this cup shell needs three order extrusion moldings, therefore in above-mentioned steps 2) need to change interior punch 6-1 and outer punch 5-1 after completing, make new in the diameter and step 2 of punch 6-2) at home and abroad the external diameter of punch 5-1 equate, new outer punch 5-2 is fixedly connected with punch retainer 7, in new, punch 6-2 is installed in the centre bore of new outer punch 5-2, start double action hydraulic press, the inner side cylinder body of double action hydraulic press drives the descending and top of punch 6-2 in new that output is with it in transmission connection to be pressed in step 2) on the diapire of the cup shell that squeezes out, and keep new interior punch 6-2 motionless, repeating step 2), make outside cylinder body drive the new descending extruding of outer punch 5-2 being in transmission connection with it, until squeeze out required part as shown in Figure 7, the diameter D of the part that this is required equates with the external diameter of new outer punch 5-2, bottom wall thickness is b, be highly h, 4) pushed, for preventing that the cup shell of extrusion molding from sticking on the outer peripheral face of outer punch, first make the outside cylinder body action of double action hydraulic press drive outer punch backhaul, and then make inner side cylinder body drive interior punch backhaul, the lower cylinder body action of double action hydraulic press, drive the push rod 11 being connected with the output of lower cylinder body up, push rod 11 promotes cushion block and the cup shell of extrusion molding is ejected to die.
Claims (6)
1. a cup shell extrusion forming method, is characterized in that: comprises the following steps,
Blank to be extruded is put into the die of the mold for extruding and forming of installing on forcing press, mold for extruding and forming comprises interior punch, interior punch overcoat is provided with outer punch, outer punch and interior punch guiding are slidably matched, forcing press has and the outer punch power output shaft that be connected corresponding to interior punch, the corresponding output shaft of forcing press drives the descending extrusion billet of interior punch being in transmission connection with it, and interior punch continues to come downwards to the thickness that the distance between the die cavity diapire of interior punch lower end and die is required part;
Top, interior punch lower end is pressed on blank and keeps motionless, and the output shaft that forcing press and outer punch are in transmission connection drives outer punch along interior punch outer peripheral face guiding down sliding extrusion billet, squeezes out required cup shell;
Extruding completes, and in forcing press drives, punch, outer punch backhaul, eject formation of parts.
2. cup shell extrusion forming method according to claim 1, it is characterized in that: after above-mentioned steps 2) having pushed, if the diameter of the part cavity being shaped does not reach required part requirement, punch and outer punch in changing, make the diameter of punch in new after changing equal the external diameter of the outer punch of preorder extruding, repeat above-mentioned steps 2), until squeeze out required part.
3. cup shell extrusion forming method according to claim 1 and 2; it is characterized in that: in above-mentioned steps 3) in; first make the output shaft that forcing press and outer punch be in transmission connection drive outer punch backhaul, and then the output shaft being in transmission connection with interior punch that makes forcing press drive interior punch backhaul.
4. cup shell extrusion forming method according to claim 3, it is characterized in that: described forcing press is the double action hydraulic press with inner side cylinder body driving mechanism and outside cylinder body driving mechanism, inner side cylinder body driving mechanism and the described interior punch of described double action hydraulic press are in transmission connection, and outside cylinder body driving mechanism and the described outer punch of described double action hydraulic press are in transmission connection.
5. be exclusively used in the extrusion die of implementing cup shell extrusion forming method as claimed in claim 1, comprise punch and die, it is characterized in that: described punch comprises interior punch, described interior punch overcoat is provided with outer punch, and described outer punch and interior punch guiding are slidably matched.
6. extrusion die according to claim 5, it is characterized in that: the upper bolster, upper padding plate and the punch retainer that also comprise from top to bottom releasable connection successively, described outer punch is fixedly connected with described punch retainer, on described upper bolster, upper padding plate and punch retainer, offer that extend, that be interconnected along the vertical direction installing hole, described interior punch is installed in described installing hole.
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| CN201310506188.2A CN103537500B (en) | 2013-10-24 | 2013-10-24 | Extrusion and molding method for cup-shaped part and special extrusion die |
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| CN201310506188.2A CN103537500B (en) | 2013-10-24 | 2013-10-24 | Extrusion and molding method for cup-shaped part and special extrusion die |
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| CN103537500A true CN103537500A (en) | 2014-01-29 |
| CN103537500B CN103537500B (en) | 2015-05-27 |
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Cited By (12)
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| CN103920733A (en) * | 2014-03-19 | 2014-07-16 | 长治市丰雨机械有限公司 | Cup-shaped bottom hole part radial extrusion positioning apparatus |
| CN105834339A (en) * | 2016-05-27 | 2016-08-10 | 江苏创汽车零部件有限公司 | Energy accumulator tank extrusion die |
| CN106984751A (en) * | 2017-06-02 | 2017-07-28 | 湘潭大学 | A kind of bottom belt two-way raised metalwork plate forging forming method and mould |
| CN107020324A (en) * | 2017-06-01 | 2017-08-08 | 句容通源电器有限公司 | A kind of cup shell mould |
| CN107186160A (en) * | 2017-07-10 | 2017-09-22 | 合肥工业大学 | The quiet step forming process of disk two of new-energy automotive air-conditioning compressor |
| CN107282678A (en) * | 2017-07-03 | 2017-10-24 | 中北大学 | A kind of extrusion stretching shaping dies of high-performance magnesium-alloy light-wall pipe |
| CN109304375A (en) * | 2018-11-27 | 2019-02-05 | 中北大学 | A kind of more punch-pin substep reverse extrusion manufacturing process |
| CN113042559A (en) * | 2021-03-16 | 2021-06-29 | 中北大学 | Thinning, stretching and extruding composite forming method for large-height-diameter-ratio cylinder |
| CN113059016A (en) * | 2021-03-16 | 2021-07-02 | 中北大学 | Thinning, stretching and extruding composite forming die for large-height-diameter ratio cylinder |
| CN113369328A (en) * | 2021-06-11 | 2021-09-10 | 中国兵器工业第五九研究所 | Open cavity circular extrusion die |
| CN113369329A (en) * | 2021-06-11 | 2021-09-10 | 中国兵器工业第五九研究所 | Multifunctional extrusion die with open cavity |
| CN113369326A (en) * | 2021-06-11 | 2021-09-10 | 中国兵器工业第五九研究所 | Open inner type progressive extrusion forming die based on current auxiliary heating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103920733B (en) * | 2014-03-19 | 2017-01-04 | 何文定 | Positioner is squeezed in cup-shaped bottom outlet part footpath |
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| CN106984751A (en) * | 2017-06-02 | 2017-07-28 | 湘潭大学 | A kind of bottom belt two-way raised metalwork plate forging forming method and mould |
| CN106984751B (en) * | 2017-06-02 | 2019-01-08 | 湘潭大学 | A kind of the metalwork plate forging forming method and mold of the two-way protrusion of bottom belt |
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| CN107282678B (en) * | 2017-07-03 | 2019-04-09 | 中北大学 | A kind of extrusion stretching shaping dies of high-performance magnesium-alloy thin-wall tube |
| CN107186160B (en) * | 2017-07-10 | 2019-06-18 | 合肥工业大学 | The quiet two step forming process of disk of new-energy automotive air-conditioning compressor |
| CN107186160A (en) * | 2017-07-10 | 2017-09-22 | 合肥工业大学 | The quiet step forming process of disk two of new-energy automotive air-conditioning compressor |
| CN109304375A (en) * | 2018-11-27 | 2019-02-05 | 中北大学 | A kind of more punch-pin substep reverse extrusion manufacturing process |
| CN113042559A (en) * | 2021-03-16 | 2021-06-29 | 中北大学 | Thinning, stretching and extruding composite forming method for large-height-diameter-ratio cylinder |
| CN113059016A (en) * | 2021-03-16 | 2021-07-02 | 中北大学 | Thinning, stretching and extruding composite forming die for large-height-diameter ratio cylinder |
| CN113059016B (en) * | 2021-03-16 | 2022-04-05 | 中北大学 | Thinning, stretching and extruding composite forming die for large-height-diameter ratio cylinder |
| CN113042559B (en) * | 2021-03-16 | 2022-04-15 | 中北大学 | Thinning, stretching and extruding composite forming method for large-height-diameter-ratio cylinder |
| CN113369328A (en) * | 2021-06-11 | 2021-09-10 | 中国兵器工业第五九研究所 | Open cavity circular extrusion die |
| CN113369329A (en) * | 2021-06-11 | 2021-09-10 | 中国兵器工业第五九研究所 | Multifunctional extrusion die with open cavity |
| CN113369326A (en) * | 2021-06-11 | 2021-09-10 | 中国兵器工业第五九研究所 | Open inner type progressive extrusion forming die based on current auxiliary heating |
| CN113369328B (en) * | 2021-06-11 | 2023-04-25 | 中国兵器工业第五九研究所 | Open die cavity circulation extrusion die |
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