CN103537500B - 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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- CN103537500B CN103537500B CN201310506188.2A CN201310506188A CN103537500B CN 103537500 B CN103537500 B CN 103537500B CN 201310506188 A CN201310506188 A CN 201310506188A CN 103537500 B CN103537500 B CN 103537500B
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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, particularly relate 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 comparatively large, if adopt single action hydraulic press extrusion molding, then extruding force is comparatively large, and the tonnage of the former is simultaneously large, and equipment investment cost is high.
Summary of the invention
the object of the invention is to propose the little cup shell repeatedly extrusion forming method of a kind of single extrusion power.The present invention also provides a kind of and is exclusively used in the extrusion die implementing said method.
for solving the problem, the technical scheme that in the present invention, a kind of cup shell extrusion forming method adopts is:
A kind of cup shell extrusion forming method, is characterized in that: comprise the following steps,
1) blank to be extruded is put into the die of the mold for extruding and forming that forcing press is installed, mold for extruding and forming comprises interior punch, interior punch overcoat is provided with outer punch, outer punch and interior punch lead and are slidably matched, forcing press has the power output shaft that connect corresponding to outer punch and interior punch, the corresponding output shaft of forcing press drives the descending extrusion billet of interior punch be in transmission connection with it, and interior punch continues the thickness that the distance come downwards between interior punch lower end and the die cavity diapire of 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 to lead slide downward extrusion billet along interior punch outer peripheral face, squeezes out required cup shell;
3) extruded, in forcing press drives, punch, outer punch backhaul, eject formation of parts.
above-mentioned steps 2) extruded after, if the diameter of the cavity of the part be shaped does not arrive required part requirements, punch and outer punch in changing, the diameter of the new interior punch after replacing is made to equal the external diameter of the outermost outer punch of preorder extruding, repeat above-mentioned steps 2), until the required cup shell squeezed out.
in above-mentioned steps 3) in, the output shaft first making forcing press and outer punch be in transmission connection drives outer punch backhaul, and then the output shaft be in transmission connection with interior punch making forcing press drive in 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 being exclusively used in the mold for extruding and forming employing implementing said method in the present invention is:
be exclusively used in the extrusion die 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 lead and be slidably matched.
Also comprise the upper bolster of releasable connection successively from top to bottom, upper padding plate and punch retainer, described outer punch is fixedly connected with described punch retainer, described upper bolster, upper padding plate and punch retainer offer installing hole that extend along the vertical direction, that be interconnected, 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, leads and be slidably matched between interior punch and outer punch, in adopting, punch and outer punch divide sequence extrusion molding, single extrusion area is little, and therefore single extrusion power reduces, thus the equipment extrusion molding cup shell that tonnage can be adopted less, reduce equipment investment cost, reduce production cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the 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 the 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 the 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 a sequence extruding postforming part;
Fig. 6 is the structural representation of two sequence extruding postforming parts;
Fig. 7 is the structural representation of the final required part be shaped.
Detailed description of the invention
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) will diameter be D as shown in Figure 4
0, be highly h
0blank put into the die of the mold for extruding and forming that double action hydraulic press is installed, double action hydraulic press has outside cylinder body and inner side cylinder body two clutch ends, 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 lead and 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 the descending extrusion billet of interior punch 6-1 driving output shaft to be with it in transmission connection, as shown in Figure 1, metal upwards flows under the squeezing action of interior punch 6-1 between the inwall of the cavity of interior punch 6-1 periphery wall and die, interior punch 6-1 continues to come downwards to the part squeezed 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) interior punch 6-1 top is kept to be pressed on blank motionless, the outside cylinder body action of double action hydraulic press the outer punch 5-1 driving output shaft to be with it in transmission connection is descending, outer punch continues extrusion billet along interior punch periphery wall guiding slide downward, as shown in Figure 2, upwards flow under the squeezing action of metal punch 5-1 outside, outer punch 5-1 comes downwards to the part squeezed out as shown in Figure 6, and this part cavity diameter D2 is equal with the external diameter of outer punch 5-1, bottom wall thickness is b, highly for h2, 3) interior punch 6-1 and outer punch 5-1 is changed, making diameter and the step 2 of new interior punch 6-2) external diameter of punch 5-1 is equal at home and abroad, new outer punch 5-2 is fixedly connected with punch retainer 7, in new, the slip of punch 6-2 guiding 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 drive output to be with it in transmission connection new in punch 6-2 descending and top is pressed in step 2) on the diapire of cup shell that squeezes out, and keep new interior punch 6-2 motionless, repeat step 2), outside cylinder body is made to drive the new descending extruding of outer punch 5-2 be 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 is equal with the external diameter of new outer punch 5-2, bottom wall thickness is b, be highly h, 4) extruded, stick on the outer peripheral face of outer punch for preventing the cup shell of extrusion molding, first the outside cylinder body action of double action hydraulic press is made to 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 be 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 sequence extrusion moldings, therefore need to change interior punch and outer punch continuation extrusion molding, if the part of shaping to be extruded in other embodiments of the invention can twice extrusion molding, above-mentioned steps 3 can be set according to actual conditions) yet; Same, if drip molding to be extruded needs by more than three times extrusion moldings, as long as then start from the 3rd sequence extruding, change once interior punch and outer punch each time, make the outer convex mould diameter that the interior convex mould diameter of every sequence equals in last sequence.
In the present embodiment for preventing the cup shell of extrusion molding from sticking on the outer peripheral face of outer punch; after having extruded; first the outside cylinder body of double action hydraulic press is made to drive outer punch backhaul; then the inner side cylinder body of double action hydraulic press is made to drive interior punch backhaul; in other embodiments of the invention; also inner side cylinder body and the action simultaneously of outside cylinder body of double action hydraulic press can be made, punch and the backhaul simultaneously of outer punch in driving respectively.
The embodiment of a kind of cup shell mold for extruding and forming of the present invention: as shown in such as 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 connection has upper padding plate 8, punch retainer 7 is connected with below upper padding plate 8, also comprise punch, punch comprises interior punch 6-1, an outer punch 5-1 is arranged with outside interior punch 6-1, outer punch 5-1 is fixedly connected with punch retainer 7, outer punch 5-1 offers along its axially extended centre bore, upper bolster 9 with upper padding plate 8 all offers the installing hole be communicated with the centre bore of outer punch 5-1, interior punch 6-1 upper end stretches out upper bolster 9 and output for the inner side cylinder body with double action hydraulic press is in transmission connection, 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 is slidably matched, part of the lower die comprises the die shoe 1 of bottom, die shoe 1 is provided with lower bolster 2, lower bolster 2 is 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, die shoe 1 and lower bolster 2 offer the jogger hole for installing push rod 11, push rod 11 is installed in jogger hole, and top, push rod 11 upper end is pressed in bottom cushion block 10, lower end is for being in transmission connection with the output ejecting cylinder body of double action hydraulic press.
The present embodiment mainly adopts above-mentioned mold for extruding and forming to be 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 be after D, diapire for b, highly be h; Owing to adopting the extruding force once extruded needed for this cup shell comparatively large, need to adopt large-tonnage equipment, high cost; Adopt this mold for extruding and forming can carry out a point sequence extrusion molding, single extrusion power is little, can reduce the tonnage of used equipment.This extrusion die is adopted to be divided into cup shell needed for three sequence extrusion moldings, comprise the following steps: 1) blank is as shown in Figure 4 put in die, start double action hydraulic press, the descending extrusion billet of interior punch 6-1 that the inner cylinder body action of double action hydraulic press drives output shaft to be with it in transmission connection, metal upwards flows under the squeezing action of interior punch 6-1 between the inwall of the cavity of interior punch 6-1 periphery wall and die, interior punch 6-1 continues to come downwards to the part squeezed 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) interior punch 6-1 top is kept to be pressed on blank motionless, the outer punch 5-1 that the outside cylinder body action of double action hydraulic press drives output to be with it in transmission connection is descending, outer punch continues extrusion billet along interior punch periphery wall guiding slide downward, upwards flow between interior punch 6-1 periphery wall die cavity inner wall under the squeezing action of metal punch 5-1 outside, outer punch 5-1 comes downwards to the part squeezed out as shown in Figure 6, the part cavity diameter D of extrusion molding
2, bottom wall thickness equal with the external diameter of outer punch 5-1 be b, highly for h
2, 3) because this cup shell needs three sequence extrusion moldings, therefore in above-mentioned steps 2) complete after need change in punch 6-1 and outer punch 5-1, making diameter and the step 2 of new interior punch 6-2) external diameter of punch 5-1 is equal at home and abroad, 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 drive output to be with it in transmission connection new in punch 6-2 descending and top is pressed in step 2) on the diapire of cup shell that squeezes out, and keep new interior punch 6-2 motionless, repeat step 2), outside cylinder body is made to drive the new descending extruding of outer punch 5-2 be in transmission connection with it, until squeeze out required part as shown in Figure 7, the diameter D of this required part is equal with the external diameter of new outer punch 5-2, bottom wall thickness is b, be highly h, 4) extruded, stick on the outer peripheral face of outer punch for preventing the cup shell of extrusion molding, first the outside cylinder body action of double action hydraulic press is made to 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 be connected with the output of lower cylinder body up, push rod 11 promotes cushion block and the cup shell of extrusion molding is ejected die.
Claims (6)
1. a cup shell extrusion forming method, is characterized in that: comprise the following steps,
1) blank to be extruded is put into the die of the mold for extruding and forming that forcing press is installed, mold for extruding and forming comprises interior punch, interior punch overcoat is provided with outer punch, outer punch and interior punch lead and are slidably matched, forcing press has the power output shaft that connect corresponding to outer punch and interior punch, the corresponding output shaft of forcing press drives the descending extrusion billet of interior punch be in transmission connection with it, and interior punch continues the thickness that the distance come downwards between interior punch lower end and the die cavity diapire of 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 to lead slide downward extrusion billet along interior punch outer peripheral face, squeezes out required cup shell;
3) extruded, 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: above-mentioned steps 2) extruded after, if the diameter of the part cavity be shaped does not reach required part requirements, punch and outer punch in changing, the diameter of the new interior punch after replacing is made to 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 the output shaft making forcing press and outer punch be in transmission connection drives outer punch backhaul, and then the output shaft be in transmission connection with interior punch making forcing press drive in 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 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 lead and be slidably matched.
6. extrusion die according to claim 5, it is characterized in that: also comprise from top to bottom the upper bolster of releasable connection successively, upper padding plate and punch retainer, described outer punch is fixedly connected with described punch retainer, described upper bolster, upper padding plate and punch retainer offer installing hole that extend along the vertical direction, that be interconnected, 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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| CN103537500B true CN103537500B (en) | 2015-05-27 |
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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 |
| CN105834339B (en) * | 2016-05-27 | 2018-09-07 | 江苏创一精锻有限公司 | A kind of accumulator tank body extrusion die |
| CN107020324A (en) * | 2017-06-01 | 2017-08-08 | 句容通源电器有限公司 | A kind of cup shell 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 |
| 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 |
| CN109304375B (en) * | 2018-11-27 | 2021-01-05 | 中北大学 | Multi-male-die step-by-step backward extrusion forming method |
| 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 |
| 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 |
| CN113369329B (en) * | 2021-06-11 | 2022-07-15 | 中国兵器工业第五九研究所 | Multifunctional extrusion die with open cavity |
| CN113369326B (en) * | 2021-06-11 | 2022-11-25 | 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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| JPS55128315A (en) * | 1979-03-27 | 1980-10-04 | Toshiba Corp | Cold and warm pressure welding and extruding method |
| JP2007331020A (en) * | 2006-06-19 | 2007-12-27 | Sanyo Special Steel Co Ltd | Tool die for hot-extrusion |
| CN101332476B (en) * | 2008-08-01 | 2010-06-02 | 河南科技大学 | Precise extrusion molding method of thin wall long-pipe shaped parts bland and special mould |
| CN102029301B (en) * | 2010-10-22 | 2012-04-11 | 南京迪威尔重型锻造股份有限公司 | Hot reverse extrusion forming process for large cup-shaped piece |
| CN102699084A (en) * | 2012-06-01 | 2012-10-03 | 北京理工大学 | Cup-shaped piece prepared through reversed and torsion extrusion |
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