CN107552700A - An a kind of upsetting formation method of the big specification strand of larger ratio of height to diameter - Google Patents
An a kind of upsetting formation method of the big specification strand of larger ratio of height to diameter Download PDFInfo
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- CN107552700A CN107552700A CN201710858743.6A CN201710858743A CN107552700A CN 107552700 A CN107552700 A CN 107552700A CN 201710858743 A CN201710858743 A CN 201710858743A CN 107552700 A CN107552700 A CN 107552700A
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Abstract
The invention discloses an a kind of upsetting formation method of the big specification strand of larger ratio of height to diameter, it is characterised in that：It is comprised the following steps：(1), bar material baiting；(2), homogenization heat treatment；(3) cylindrical blank, is heated to forming temperature and is incubated, and upsetting formation mould is integrally preheating to more than cylindrical blank temperature and is incubated, described upsetting formation mould it include punch-pin, upper cavity die, lower cavity die, cylindrical push rod；Upper cavity die is located at the lower section of punch-pin；Lower cavity die is located at the lower section of upper cavity die, the die cavity internal diameter d of lower cavity die1More than the die cavity internal diameter d of upper cavity die1, the high h of die cavity of lower cavity die2, the total high h of the die cavity of upper cavity die and the die cavity of lower cavity die1, wherein h1/d1=n (n ＞ 3), jumping-up condition needs to meet(4), upper cavity die will be put into, in recessed model cavity by homogenizing the cylindrical blank of heat treatment；(5), jumping-up；(6) jumping-up part, is taken out.The present invention effectively avoids " Double drum type " and folded, and realizes the large plastometric set of big specification casting rod.
Description
Technical field
The present invention relates to metallic extrusion molding technical field, and in particular to an a kind of upsetting of the big specification strand of larger ratio of height to diameter
Dumming method.
Background technology
Upsetting process is the process of an inhomogeneous deformation.During cylindrical blank jumping-up, general ratio of height to diameter is limited in
Less than or equal to 2.5.As ratio of height to diameter (2 ＜ H/D ＜ 3), Double drum type is easily presented in workpiece side surface.Particularly when pass deformation compared with
When small and contact friction is larger, deformation is difficult deeply and adhesioin zone volume increases.At this moment, deformation is distributed very uneven, plasticity
Deformation only height to outer layer occur；After H/D ratios are more than 3, it is also possible to because unstability and caused by workpiece buckling produce
The defects of folding so that subsequent handling cannot be carried out.Especially when blank end face is uneven or with blank axis out of plumb, or blank
Temperature and performance are uneven everywhere, or template top and bottom are not parallel, blank is produced buckling, if be not corrected for
Continue to forge, folding will be formed.Folding is a kind of troubles, and it not only reduces the loaded area of part, and when working this
Place produces stress concentration, usually as tired source.Therefore, typically it is not allow for folding on regulation forging in technical conditions.
The content of the invention
In view of the defects and deficiencies of the prior art, the present invention intends to provide one kind is simple in construction, reasonable in design, makes
, can when ratio of height to diameter is more than 3 cylindrical blank jumping-up with a upsetting formation method of the big specification strand of convenient larger ratio of height to diameter
Effectively to avoid " Double drum type " and fold, the large plastometric set of big specification casting rod is realized.
To achieve the above object, the technical solution adopted by the present invention is：
An a kind of upsetting formation method of the big specification strand of larger ratio of height to diameter, it is comprised the following steps：
(1), bar material baiting；
(2), homogenization heat treatment；
(3) cylindrical blank, is heated to forming temperature and is incubated, and upsetting formation mould is integrally preheating to cylinder
More than blank temperature and be incubated, described upsetting formation mould it include punch-pin, upper cavity die, lower cavity die, cylindrical push rod；It is described
Punch-pin be fixedly connected by cope plate with the top shoe of forcing press；Upper cavity die is located at the lower section of punch-pin；Lower cavity die is located at fovea superior
The lower section of mould, and be fixedly connected by fastener or bearing pin with upper cavity die, the die cavity internal diameter d of described lower cavity die1More than fovea superior
The die cavity internal diameter d of mould1, the high h of die cavity of lower cavity die2, the total high h of the die cavity of upper cavity die and the die cavity of lower cavity die1, wherein h1/d1=n (n
＞ 3), jumping-up condition needs to meet
(4), by the mould installion after preheating insulation on forcing press；It is organic to punch-pin, upper cavity die, lower cavity die even application
Graphitic lubricant；Cylindrical blank by homogenization heat treatment is put into upper cavity die, in recessed model cavity；
(5), forcing press drives punch-pin to move downward, and the upper blank of cylindrical blank is limited in when jumping-up is initial
In upper cavity die, when starting jumping-up, the part is indeformable, and the extruding force that punch-pin applies only is passed into bottom base by the part
Material, and the ratio of height to diameter of the unrestricted blank in bottom is less than 3, so being not in unstability, even if because blank end face injustice causes
Unstability slightly, in upsetting process, the cydariform of cylindrical blank can contact the inwall of lower cavity die first, obtain cylindrical blank
To school shape, ensure the progress of upsetting process；And the initial confined metal in the top of cylindrical blank, in upsetting process, with
The continuous jumping-up of bottom blank, progresses into the unrestricted lower cavity die in bottom, realizes jumping-up, be finally upset as required jumping-up
Part；
(6), press ram drives the upward motion of punch-pin；Forcing press liftout tank moves upwards, make, cylindrical push rod to
Upper motion, the bottom of jumping-up part is risen to the port of export of upper cavity die, then taken out；By punch-pin and upper cavity die, lower cavity die matched moulds,
The fastening bolt being connected with press ram and lower table is unscrewed, uninstalls mould.
After such scheme, the present invention has the beneficial effect that：The big specification strand of a kind of larger ratio of height to diameter of the present invention
Upsetting formation mould and method, ratio of height to diameter is more than 3 cylindrical blanks and controlled in deformation moment actual ratio of height to diameter in H/D
＜ 2.5, effectively avoid " Double drum type " and fold, realize the large plastometric set of big specification casting rod.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the structural representation of the present invention；
Fig. 2 is working state schematic representation when cylindrical blank being put into mould before jumping-up in the embodiment of the present invention；
Fig. 3 is only bottom blank deformation stage mold work state when cylindrical blank starts jumping-up in the embodiment of the present invention
Schematic diagram；
Fig. 4 is that cylindrical blank upsetting process middle and upper part blank progresses into lower cavity die deformation stage in the embodiment of the present invention
Mold work view；
Fig. 5 be in the embodiment of the present invention cylindrical blank in jumping-up end shaping stage mold work view.
Fig. 6 is the schematic diagram of the present invention.
Description of reference numerals：
1st, punch-pin；2nd, upper cavity die；3rd, lower cavity die；4th, fastener；5th, bottom plate；6th, lower template；7th, upper jacking block；8th, lower top
Block；9th, cylindrical push rod；9-1, stair-step；10th, cylindrical blank.
Embodiment
Below in conjunction with the accompanying drawings, the present invention is further illustrated.
Referring to shown in Fig. 1, the technical scheme that present embodiment uses is：It includes cope plate, punch-pin 1, upper cavity die
2nd, lower cavity die 3, bottom plate 5, lower template 6, upper jacking block 7, lower jacking block 8, cylindrical push rod 9；Described punch-pin 1 passes through cope plate
It is fixedly connected with the top shoe of forcing press；Upper cavity die 2 is located at the lower section of punch-pin 1；Lower cavity die 3 is located at the lower section of upper cavity die 2, and leads to
Fastener 4 or bearing pin is crossed to be fixedly connected with upper cavity die 2；Lower cavity die 3, bottom plate 5, lower template 6 are fixed successively by fastener 4
Connection；Bottom plate 5 is provided with upper jacking block hole；Upper jacking block 7 is located in jacking block hole；Lower template 6 is provided with shoulder hole；Cylinder
The top of push rod 9 is provided with stair-step 9-1；The top of lower jacking block 8 and cylindrical push rod 9 is located in shoulder hole；Upper jacking block 7, under
Jacking block 8, cylindrical push rod 9 contact connection successively；The end of cylindrical push rod 9 is connected with forcing press liftout tank；
Preferably, the die cavity internal diameter of described lower cavity die 3 is more than the die cavity internal diameter of upper cavity die 2；
Preferably, the diameter of described upper jacking block 7 is more than the diameter of lower jacking block 8.
Present invention also offers a upsetting formation method of the big specification strand of larger ratio of height to diameter, with 400 × 2042mm's of Φ
Exemplified by cylindrical blank, it is comprised the following steps：
First, bar material baiting, the cylindrical blank 10 that size is 400 × 2042mm of Φ is obtained；
2nd, homogenization heat treatment；
3rd, cylindrical blank 10 is heated to forming temperature and be incubated, and upsetting formation mould is integrally preheating to cylinder
More than body blank temperature and it is incubated；
4th, by the mould installion after preheating insulation on forcing press；Have to punch-pin 1, upper cavity die 2, the even application of lower cavity die 3
Machine graphitic lubricant；Cylindrical blank 10 by homogenization heat treatment is put into upper cavity die 2, in the die cavity of lower cavity die 3 (referring to figure
Shown in 2)；
5th, forcing press drives punch-pin 1 to move downward, and the blank of the top 958mm length of cylindrical blank is initial in jumping-up
When, it is limited in upper cavity die 2, when starting jumping-up, the part is indeformable, only passes the extruding force that punch-pin applies by the part
The blank of lower part 1084mm length thereofs is passed, and the ratio of height to diameter of the unrestricted blank in bottom is 2.7 ＜ 3, so will not go out
Existing unstability, even if because blank end face injustice causes unstability slightly, in upsetting process, the cydariform of cylindrical blank 10 can be first
First contact the inwall of lower cavity die 3, cylindrical blank 10 is obtained school shape, ensure the progress of upsetting process (referring to shown in Fig. 3)；And
The initial confined metal in the top of cylindrical blank 10, in upsetting process, with the continuous jumping-up of bottom blank, gradually enters
Enter to the unrestricted lower cavity die 3 in bottom, realize jumping-up (referring to shown in Fig. 4), so, equivalent in upsetting process, reduce base
The ratio of height to diameter of material, the Partial Conversion more than ratio of height to diameter to upsetting formation during, ensure the Gao Jing all the time of jumping-up
Than be both less than designed bottom cavity plate jumping-up at the beginning 2.7, finally it is upset as required jumping-up part (referring to shown in Fig. 5)；
6th, press ram drives the upward motion of punch-pin 1；Forcing press liftout tank moves upwards, makes jacking block 7, lower top
Block 8, cylindrical push rod 9 are moved upwards, and the bottom of jumping-up part is risen to the port of export of upper cavity die 2, then taken out；By punch-pin 1
With upper cavity die 2, the matched moulds of lower cavity die 3, the fastening bolt being connected with press ram and lower table is unscrewed, uninstalls mould.
Referring to shown in Fig. 6, if cylindrical blank original dimension is d1×h1, size is d after jumping-up2×h2, wherein ratio of height to diameter
h1/d1=n (n ＞ 3), fixed part h=h2-h1；The green part h2/d2 ＜ 2 in lower cavity die, if taking limit h2/d2=2, then
h2=2d2, wherein h=h1-h2；Therefore volume Arrangement can obtain
(d2 2-d1 2)So upsetting
Thick condition needs to meetAn a kind of upsetting formation of the big specification strand of larger ratio of height to diameter of the present invention can be used
Mould, so jumping-up condition corresponding to this case upsetting formation mould needs to meetThe wherein die cavity internal diameter d of lower cavity die 31Greatly
In the die cavity internal diameter d of upper cavity die 21, the high h of die cavity of lower cavity die 32, the total high h of the die cavity of upper cavity die 2 and the die cavity of lower cavity die1, wherein
h1/d1=n (n ＞ 3).
After such scheme, present embodiment has the beneficial effect that：A kind of larger ratio of height to diameter of the present invention is big
A upsetting formation mould and method for specification strand, ratio of height to diameter is more than Gao Jing of 3 cylindrical blanks in deformation moment reality
Than controlling in H/D ＜ 2.5, effectively avoid " Double drum type " and fold, realize the large plastometric set of big specification casting rod.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (1)
- An a kind of 1. upsetting formation method of the big specification strand of larger ratio of height to diameter, it is characterised in that：It is comprised the following steps：(1), bar material baiting；(2), homogenization heat treatment；(3) cylindrical blank, is heated to forming temperature and is incubated, and upsetting formation mould is integrally preheating to cylindrical blank More than temperature and be incubated, described upsetting formation mould it include punch-pin, upper cavity die, lower cavity die, cylindrical push rod；Described is convex Mould is fixedly connected by cope plate with the top shoe of forcing press；Upper cavity die is located at the lower section of punch-pin；Lower cavity die is located at upper cavity die Lower section, and be fixedly connected by fastener or bearing pin with upper cavity die, the die cavity internal diameter d of described lower cavity die1More than upper cavity die Die cavity internal diameter d1, the high h of die cavity of lower cavity die2, the total high h of the die cavity of upper cavity die and the die cavity of lower cavity die1, wherein h1/d1=n (n ＞ 3), jumping-up condition needs to meet(4), by the mould installion after preheating insulation on forcing press；To punch-pin, upper cavity die, the organic graphite of lower cavity die even application Lubricant；Cylindrical blank by homogenization heat treatment is put into upper cavity die, in recessed model cavity；(5), forcing press drives punch-pin to move downward, and the upper blank of cylindrical blank is limited in fovea superior when jumping-up is initial In mould, when starting jumping-up, the part is indeformable, and the extruding force that punch-pin applies only is passed into bottom blank by the part, and The ratio of height to diameter of the unrestricted blank in bottom is less than 3, so being not in unstability, even if because blank end face injustice causes slightly Unstability, in upsetting process, the cydariform of cylindrical blank can contact the inwall of lower cavity die first, cylindrical blank is obtained school Shape, ensure the progress of upsetting process；And the initial confined metal in the top of cylindrical blank, in upsetting process, under The continuous jumping-up of portion's blank, progress into the unrestricted lower cavity die in bottom, realize jumping-up, be finally upset as required jumping-up part；(6), press ram drives the upward motion of punch-pin；Forcing press liftout tank moves upwards, makes, cylindrical push rod is transported upwards It is dynamic, the bottom of jumping-up part is risen to the port of export of upper cavity die, then taken out；, will be with by punch-pin and upper cavity die, lower cavity die matched moulds The fastening bolt that press ram is connected with lower table is unscrewed, and uninstalls mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710858743.6A CN107552700B (en) | 2017-09-13 | 2017-09-13 | An a kind of upsetting formation method of the big specification slab of larger ratio of height to diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710858743.6A CN107552700B (en) | 2017-09-13 | 2017-09-13 | An a kind of upsetting formation method of the big specification slab of larger ratio of height to diameter |
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| Publication Number | Publication Date |
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| CN107552700A true CN107552700A (en) | 2018-01-09 |
| CN107552700B CN107552700B (en) | 2019-08-16 |
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|---|---|---|---|
| CN201710858743.6A Active CN107552700B (en) | 2017-09-13 | 2017-09-13 | An a kind of upsetting formation method of the big specification slab of larger ratio of height to diameter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110180982A (en) * | 2019-07-10 | 2019-08-30 | 哈尔滨工业大学 | A kind of mold temperature is higher than the thermo shaping method of blank temperature |
| CN113579144A (en) * | 2021-09-26 | 2021-11-02 | 中国航发北京航空材料研究院 | Upsetting die and forming method for round bar with ultra-large height-diameter ratio |
| CN116603963A (en) * | 2023-05-24 | 2023-08-18 | 陕西长羽航空装备股份有限公司 | Upsetting method for high-temperature alloy with large height-diameter ratio |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110180982A (en) * | 2019-07-10 | 2019-08-30 | 哈尔滨工业大学 | A kind of mold temperature is higher than the thermo shaping method of blank temperature |
| CN110180982B (en) * | 2019-07-10 | 2020-12-29 | 哈尔滨工业大学 | Hot forming method with mold temperature higher than blank temperature |
| CN113579144A (en) * | 2021-09-26 | 2021-11-02 | 中国航发北京航空材料研究院 | Upsetting die and forming method for round bar with ultra-large height-diameter ratio |
| CN113579144B (en) * | 2021-09-26 | 2022-01-11 | 中国航发北京航空材料研究院 | Upsetting die and forming method for round bar with ultra-large height-diameter ratio |
| CN116603963A (en) * | 2023-05-24 | 2023-08-18 | 陕西长羽航空装备股份有限公司 | Upsetting method for high-temperature alloy with large height-diameter ratio |
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| CN107552700B (en) | 2019-08-16 |
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