CN107497984B - An a kind of upsetting formation mold of the big specification slab of larger ratio of height to diameter - Google Patents
An a kind of upsetting formation mold of the big specification slab of larger ratio of height to diameter Download PDFInfo
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- CN107497984B CN107497984B CN201710858744.0A CN201710858744A CN107497984B CN 107497984 B CN107497984 B CN 107497984B CN 201710858744 A CN201710858744 A CN 201710858744A CN 107497984 B CN107497984 B CN 107497984B
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- cavity die
- diameter
- jacking block
- height
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
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- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses an a kind of upsetting formation molds of the big specification slab of larger ratio of height to diameter, which is characterized in that it includes punch-pin, upper cavity die, lower cavity die；The punch-pin is fixedly connected by cope plate with the top shoe of press machine；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, and is fixedly connected by fastener or pin shaft with upper cavity die, the intracavitary diameter d of the type of the lower cavity die2Diameter d intracavitary greater than the type of upper cavity die1, the high h of type chamber of lower cavity die2, the total high h of the type chamber of the type chamber of upper cavity die and lower cavity die1, wherein h1/d1=n, wherein n > 3, jumping-up condition need to meet.It can make ratio of height to diameter be greater than 3 cylindrical blanks in the actual ratio of height to diameter control of deformation moment in H/D < 2.5, effectively avoid " Double drum type " and fold, realize the large plastometric set of big specification casting rod.
Description
Technical field
The present invention relates to metallic extrusion molding technical fields, and in particular to an a kind of upsetting of the big specification slab of larger ratio of height to diameter
Dumming mold.
Background technique
Upsetting process is the process of an inhomogeneous deformation.When 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), workpiece side surface is easy that Double drum type is presented.Especially 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 ratio is more than 3, it is also possible to the buckling of workpiece be caused to generate because of unstability
The defects of folding, so that subsequent handling cannot carry out.Especially when blank end face is uneven or with blank axis out of plumb or blank
Temperature and performance is uneven or template top and bottom are not parallel everywhere can all make blank generate buckling, if be not corrected
Continue to forge, just will form folding.Folding is a kind of troubles, it not only reduces the loaded area of part, and when working this
Place generates stress and concentrates, and usually becomes tired source.Therefore, it is generally not allow for folding on regulation forging in technical conditions.
Summary of the invention
In view of the defects and deficiencies of the prior art, the present invention intends to provide a kind of simple structure and reasonable design, make
It can when ratio of height to diameter is greater than 3 cylindrical blank jumping-up with a upsetting formation mold of convenient larger ratio of height to diameter big specification slab
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 that: it includes cope plate, punch-pin, upper cavity die, recessed
Mould, bottom plate, lower template, upper jacking block, lower jacking block, cylindrical mandril；The punch-pin is upper by cope plate and press machine
Sliding block is fixedly connected；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, and by fastener or pin shaft with
Upper cavity die is fixedly connected, the intracavitary diameter d of the type of the lower cavity die2Diameter d intracavitary greater than the type of upper cavity die1, the type chamber height of lower cavity die
h2, the total high h of the type chamber of the type chamber of upper cavity die and lower cavity die1, wherein h1/d1=n, wherein n > 3, jumping-up condition need to meetLower cavity die, bottom plate, lower template are fixedly connected sequentially by fastener；Bottom plate is equipped with upper jacking block hole；
Upper jacking block is located in jacking block hole；Lower template is equipped with stepped hole；The top of cylindrical mandril is equipped with stair-step；Lower jacking block and
The top of cylindrical mandril is located in stepped hole；Upper jacking block, lower jacking block, cylindrical mandril successively connect；Cylindrical mandril
End connect with press machine liftout tank.
Preferably, the diameter of the upper jacking block is greater than the diameter of lower jacking block.
After adopting the above scheme, the invention has the following beneficial effects: a kind of larger ratio of height to diameter of the present invention big specification slab
Upsetting formation mold and method, by ratio of height to diameter, greater than 3 cylindrical blank, at the deformation moment, actual ratio of height to diameter control exists
H/D < 2.5 effectively avoids " Double drum type " and folds, realizes the large plastometric set of big specification casting rod.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is working state schematic representation when cylindrical blank being put into mold before jumping-up in the embodiment of the present invention；
Fig. 3 is only lower part 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 status diagram；
Fig. 5 be in the embodiment of the present invention cylindrical blank in jumping-up end shaping stage mold work status diagram.
Fig. 6 is the principle of the present invention figure.
Description of symbols:
1, punch-pin；2, upper cavity die；3, lower cavity die；4, fastener；5, bottom plate；6, lower template；7, upper jacking block；8, lower top
Block；9, cylindrical mandril；9-1, stair-step；10, cylindrical blank.
Specific embodiment
With reference to the accompanying drawing, the present invention is further illustrated.
Referring to shown in Fig. 1, present embodiment the technical solution adopted is that: it includes cope plate, punch-pin 1, upper cavity die
2, lower cavity die 3, bottom plate 5, lower template 6, upper jacking block 7, lower jacking block 8, cylindrical mandril 9；The punch-pin 1 passes through cope plate
It is fixedly connected with the top shoe of press machine；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 pin shaft is crossed to be fixedly connected with upper cavity die 2；Lower cavity die 3, bottom plate 5, lower template 6 are successively fixed by fastener 4
Connection；Bottom plate 5 is equipped with upper jacking block hole；Upper jacking block 7 is located in jacking block hole；Lower template 6 is equipped with stepped hole；It is cylindrical
The top of mandril 9 is equipped with stair-step 9-1；The top of lower jacking block 8 and cylindrical mandril 9 is located in stepped hole；Upper jacking block 7, under
Jacking block 8, cylindrical mandril 9 successively connect；The end of cylindrical mandril 9 is connect with press machine liftout tank；
Preferably, the intracavitary diameter of type of the lower cavity die 3 is greater than the intracavitary diameter of type of upper cavity die 2；
Preferably, the diameter of the upper jacking block 7 is greater than the diameter of lower jacking block 8.
The present invention also provides a upsetting formation methods of the big specification slab of larger ratio of height to diameter, with 400 × 2042mm's of Φ
For cylindrical blank, it is comprised the following steps:
One, bar material baiting obtains the cylindrical blank 10 having a size of 400 × 2042mm of Φ；
Two, homogenization heat treatment；
Three, cylindrical blank 10 is heated to forming temperature and kept the temperature, and upsetting formation mold is integrally preheating to cylinder
It more than body blank temperature and keeps the temperature；
Four, the mold after preheating insulation is mounted on press machine；Have to punch-pin 1, upper cavity die 2,3 even application of lower cavity die
Machine graphitic lubricant；It is intracavitary (referring to figure by upper cavity die 2,3 type of lower cavity die is put by the cylindrical blank 10 of homogenization heat treatment
Shown in 2)；
Five, press machine 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 thereof is passed, and the ratio of height to diameter of the unrestricted blank in lower part is 2.7 < 3, so will not go out
Existing unstability, even if in upsetting process, the cydariform of cylindrical blank 10 can be first since blank end face injustice causes unstability slightly
The inner wall for first contacting lower cavity die 3, makes cylindrical blank 10 obtain school shape, guarantees the progress of upsetting process (shown in referring to Fig. 3)；And
The initial confined metal in the top of cylindrical blank 10, in upsetting process, with the continuous jumping-up of lower part blank, gradually into
Enter to the unrestricted lower cavity die 3 in lower part, realizes that jumping-up (referring to shown in Fig. 4) reduces base in this way, being equivalent in upsetting process
The ratio of height to diameter of material, be more than ratio of height to diameter Partial Conversion to upsetting formation during, guarantee the Gao Jing all the time of jumping-up
Than be both less than designed lower part cavity plate jumping-up at the beginning 2.7, finally it is upset as required jumping-up part (referring to shown in Fig. 5)；
Six, the movement that press ram drives punch-pin 1 upward；Press machine liftout tank moves upwards, and makes jacking block 7, lower top
Block 8, cylindrical mandril 9 move upwards, and the bottom of jumping-up part is risen to the outlet end of upper cavity die 2, is then taken out；By punch-pin 1
It is molded with upper cavity die 2, lower cavity die 3, the fastening bolt being connected with press ram and lower table is unscrewed, mold is uninstalled.
Referring to shown in Fig. 6, if cylindrical blank original dimension is d1×h1, having a size of d after jumping-up2×h2, wherein ratio of height to diameter
h1/d1=n, wherein n > 3, fixed part h=h1-h2；The green part h in lower cavity die2/d2< 2, if taking limit h2/d2=2,
Then h2=2d2, wherein h=h1-h2；Therefore volume Arrangement can
Obtain (d2 2-d1 2)So
Jumping-up condition needs to meetA kind of being once upset as big specification slab of larger ratio of height to diameter of the present invention can be used
Shape mold, so the corresponding jumping-up condition of this case upsetting formation mold needs to meetThe wherein intracavitary diameter of the type of lower cavity die 3
d2Diameter d intracavitary greater than the type of upper cavity die 21, the high h of type chamber of lower cavity die 32, the total high h of the type chamber of the type chamber of upper cavity die 2 and lower cavity die1,
Wherein h1/d1=n, wherein n > 3.
After adopting the above 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 mold and method for specification slab, the cylindrical blank by ratio of height to diameter greater than 3 is in deformation moment actual height
Diameter, in H/D < 2.5, effectively avoids " Double drum type " and folds, realize the large plastometric set of big specification casting rod than control.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (2)
1. an a kind of upsetting formation mold of the big specification slab of larger ratio of height to diameter, which is characterized in that it include cope plate, punch-pin,
Upper cavity die, lower cavity die, bottom plate, lower template, upper jacking block, lower jacking block, cylindrical mandril；The punch-pin by cope plate with
The top shoe of press machine is fixedly connected；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, and passes through fastening
Part is fixedly connected with upper cavity die, the intracavitary diameter d of the type of the lower cavity die2Diameter d intracavitary greater than the type of upper cavity die1, the type chamber of lower cavity die
High h2, the total high h of the type chamber of the type chamber of upper cavity die and lower cavity die1, wherein h1/d1=n, wherein n > 3, jumping-up condition need to meetLower cavity die, bottom plate, lower template are fixedly connected sequentially by fastener；Bottom plate is equipped with upper jacking block hole；
Upper jacking block is located in jacking block hole；Lower template is equipped with stepped hole；The top of cylindrical mandril is equipped with stair-step；Lower jacking block and
The top of cylindrical mandril is located in stepped hole；Upper jacking block, lower jacking block, cylindrical mandril successively connect；Cylindrical mandril
End connect with press machine liftout tank.
2. an a kind of upsetting formation mold of the big specification slab of larger ratio of height to diameter according to claim 1, which is characterized in that
The diameter of the upper jacking block is greater than the diameter of lower jacking block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710858744.0A CN107497984B (en) | 2017-09-13 | 2017-09-13 | An a kind of upsetting formation mold of the big specification slab of larger ratio of height to diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710858744.0A CN107497984B (en) | 2017-09-13 | 2017-09-13 | An a kind of upsetting formation mold of the big specification slab of larger ratio of height to diameter |
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| Publication Number | Publication Date |
|---|---|
| CN107497984A CN107497984A (en) | 2017-12-22 |
| CN107497984B true CN107497984B (en) | 2019-07-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111203503A (en) * | 2020-03-09 | 2020-05-29 | 中北大学 | Continuous upsetting blank making method for large-size large-height-diameter-ratio magnesium alloy cast rod |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111203508B (en) * | 2020-03-09 | 2021-06-15 | 中北大学 | Continuous upsetting blank making die for magnesium alloy cast rod |
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| JPH08332544A (en) * | 1995-06-07 | 1996-12-17 | Japan Steel Works Ltd:The | Upsetting method of long size stock |
| JP2001137997A (en) * | 1999-11-18 | 2001-05-22 | Sawai Narejji Laboratory:Kk | Method and apparatus for die-forging |
| JP2017087260A (en) * | 2015-11-09 | 2017-05-25 | 三菱自動車工業株式会社 | Forging device and manufacturing method of forging product |
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|---|---|---|---|---|
| US4253323A (en) * | 1978-03-24 | 1981-03-03 | Aida Engineering, Ltd. | Method for manufacturing high precision slugs |
| CN104384416A (en) * | 2014-10-29 | 2015-03-04 | 太原理工大学 | Blank pre-upsetting forming die and method |
| CN204276778U (en) * | 2014-12-04 | 2015-04-22 | 天仟重工有限公司 | A kind of heading die adopting compressed air type to eject |
| CN106607534A (en) * | 2015-10-27 | 2017-05-03 | 陕西宏远航空锻造有限责任公司 | Upsetting method of cylindrical ingot blank or bar with large height to diameter ratio |
| CN105772614A (en) * | 2016-04-22 | 2016-07-20 | 中北大学 | Uniform upsetting forming method for large-height-diameter-ratio magnesium alloy bar |
| CN106623718A (en) * | 2016-12-08 | 2017-05-10 | 山东大学 | Continuous tapered upsetting die and upsetting method for bar material with superhigh height-diameter ratio |
| CN106964735A (en) * | 2017-03-31 | 2017-07-21 | 武汉理工大学 | A kind of super large ratio of height to diameter metal stock upsetting formation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111203503A (en) * | 2020-03-09 | 2020-05-29 | 中北大学 | Continuous upsetting blank making method for large-size large-height-diameter-ratio magnesium alloy cast rod |
| CN111203503B (en) * | 2020-03-09 | 2021-06-18 | 中北大学 | Continuous upsetting blank making method for large-size large-height-diameter-ratio magnesium alloy cast rod |
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| CN107497984A (en) | 2017-12-22 |
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