CN105710265A - Forging process for vent valve forming die - Google Patents
Forging process for vent valve forming die Download PDFInfo
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- CN105710265A CN105710265A CN201410721219.0A CN201410721219A CN105710265A CN 105710265 A CN105710265 A CN 105710265A CN 201410721219 A CN201410721219 A CN 201410721219A CN 105710265 A CN105710265 A CN 105710265A
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- forging
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- upsetting
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Abstract
The invention discloses a forging process for a vent valve forming die. The forging process is characterized by including the following steps that (1) materials are prepared; (2) the first time of heating is carried out; (3) a rod portion is drawn out by adopting a 1.5t flat die hammer as forging equipment for rod portion drawing out and head portion upsetting forming so as to guarantee enough deformation force, a free drawing out procedure is adopted for drawing out the rod portion, a swaging die is used for swaging the rod portion to phi 30 mm from phi 55 mm, and a head portion is subjected to forming-die forming in a subsequence procedure; (4) the second time of heating is carried out with the heating process basically identical with that of the first time of heating, but the heating time and the heat preserving time can be correspondingly shortened by means of waste heat of a forging during drawing-out; (5) the head portion is subjected to upsetting with the 1.5t flat die hammer as the forging equipment, a forging manipulator is used for clamping the die, the die is preheated to 200-250 DEG C first before upsetting, then a heated blank is placed in the die for upsetting forming, and due to the fact that the upsetting deformation degree is too high and forging cracks are prone to generation, the head portion needs to be formed through two-time forging instead of one-time forting; and (6) heat treatment after forging is carried out, and solid solution strengthening treatment is carried out after forging.
Description
Technical field
The present invention relates to a kind of air bleeding valve loose tooling forging fabrication technique.
Background technology
The big-and-middle-sized boats and ships of China, aircraft, tank diesel engine air bleeding valve mainly from Norway's import.Owing to the working environment of air bleeding valve is high temperature and high speed, it is necessary to possess very high heat resistance, owing to high temperature strength is high, resistance of deformation is very big, has naturally been increased by the difficulty of forging and molding.Simultaneously as air bleeding valve is from its mechanical requirements, surface requirements reaches Whole fiber tissue, forging and Technology for Heating Processing and requires very high, and the various service checks after forging are also very comprehensive, therefore, will produce qualified forging extremely difficult.
Summary of the invention
Because the drawbacks described above of prior art, the technical problem to be solved is to provide a kind of air bleeding valve loose tooling forging fabrication technique, and this process for forging is simple, and the air bleeding valve various aspects of performance after forging is all obviously improved.
For achieving the above object, the invention provides a kind of air bleeding valve loose tooling forging fabrication technique, it is characterised in that, comprise the steps, 1) to get the raw materials ready: raw material is Nimonic80A, and material is stocking, diameter Ф 55mm, for ensureing forging head end quality, adopt sawing machine blanking, for preventing face crack, the method adopting turnery processing, removing System of Detecting Surface Defects For Material, the turning degree of depth, depending on material surface quality condition, is generally 2～3mm；Material two ends chamfered edge；
2) first time heating: firing equipment: consider uniformity and oxidisability that material heats, adopt the good well-type electric furnace heating of sealing property, heating-up temperature: 700 DEG C, temperature retention time: 20 minutes, it is impossible to make blank long in the high-temperature region time of staying, in order to ensure that heating-up temperature is uniform, blank is contained in and electric furnace put into by a ferrum case heats together, then come out of the stove together, deliver on flat-die hammer, further take out blank and forge；
3) bar portion pulling: forging equipment: in order to ensure enough deformation forces, we select 1.5t flat-die hammer as the forging equipment of the pulling of bar portion with head upsetting formation；Bar portion pulls out: adopts and freely pulls out operation, and by tup, by Ф 55mm, bar portion is fallen into Ф 30mm, stays head to utilize loose tool to shape in later process；
4) second time heating: heating technique is basic to be heated identical with first time, but forging waste heat when can utilize pulling, make heat time heating time and temperature retention time shorten accordingly；
5) head jumping-up: forging equipment: 1.5t flat-die hammer, adopt forging manipulator clamping mould, first by mould and die preheating to 200～250 DEG C before jumping-up, again heated blank is put into jumping-up molding in mould, owing to Upsetting degree is too big, it is easy to produce forge crack, therefore, head can not shape by One-time forging, it is necessary to two fire；
6) heat treatment after forging: carry out solution strengthening process after forging.
The invention has the beneficial effects as follows: present invention process method is simple, and the air bleeding valve various aspects of performance after forging is all obviously improved.
Detailed description of the invention
Technical scheme disclosed by the invention is a kind of air bleeding valve loose tooling forging fabrication technique, comprise the steps, 1) to get the raw materials ready: raw material is Nimonic80A, and material is stocking, diameter Ф 55mm, for ensureing forging head end quality, adopt sawing machine blanking, for preventing face crack, the method adopting turnery processing, removing System of Detecting Surface Defects For Material, the turning degree of depth, depending on material surface quality condition, is generally 2～3mm；Material two ends chamfered edge；
2) first time heating: firing equipment: consider uniformity and oxidisability that material heats, adopt the good well-type electric furnace heating of sealing property, heating-up temperature: 700 DEG C, temperature retention time: 20 minutes, it is impossible to make blank long in the high-temperature region time of staying, in order to ensure that heating-up temperature is uniform, blank is contained in and electric furnace put into by a ferrum case heats together, then come out of the stove together, deliver on flat-die hammer, further take out blank and forge；
3) bar portion pulling: forging equipment: in order to ensure enough deformation forces, we select 1.5t flat-die hammer as the forging equipment of the pulling of bar portion with head upsetting formation；Bar portion pulls out: adopts and freely pulls out operation, and by tup, by Ф 55mm, bar portion is fallen into Ф 30mm, stays head to utilize loose tool to shape in later process；
4) second time heating: heating technique is basic to be heated identical with first time, but forging waste heat when can utilize pulling, make heat time heating time and temperature retention time shorten accordingly；
5) head jumping-up: forging equipment: 1.5t flat-die hammer, adopt forging manipulator clamping mould, first by mould and die preheating to 200～250 DEG C before jumping-up, again heated blank is put into jumping-up molding in mould, owing to Upsetting degree is too big, it is easy to produce forge crack, therefore, head can not shape by One-time forging, it is necessary to two fire；
6) heat treatment after forging: carry out solution strengthening process after forging.The preferred embodiment of the present invention described in detail above.Present invention process method is simple, and the air bleeding valve various aspects of performance after forging is all obviously improved.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work.Therefore, all technical staff in the art, all should in the protection domain being defined in the patent claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (1)
1. an air bleeding valve loose tooling forging fabrication technique, it is characterised in that comprise the steps, 1) get the raw materials ready: raw material is Nimonic80A, material is stocking, diameter Ф 55mm, for ensureing forging head end quality, adopt sawing machine blanking, for preventing face crack, the method adopting turnery processing, remove System of Detecting Surface Defects For Material, the turning degree of depth, depending on material surface quality condition, is generally 2～3mm；Material two ends chamfered edge；2) first time heating: firing equipment: consider uniformity and oxidisability that material heats, adopt the good well-type electric furnace heating of sealing property, heating-up temperature: 700 DEG C, temperature retention time: 20 minutes, it is impossible to make blank long in the high-temperature region time of staying, in order to ensure that heating-up temperature is uniform, blank is contained in and electric furnace put into by a ferrum case heats together, then come out of the stove together, deliver on flat-die hammer, further take out blank and forge；3) bar portion pulling: forging equipment: in order to ensure enough deformation forces, we select 1.5t flat-die hammer as the forging equipment of the pulling of bar portion with head upsetting formation；Bar portion pulls out: adopts and freely pulls out operation, and by tup, by Ф 55mm, bar portion is fallen into Ф 30mm, stays head to utilize loose tool to shape in later process；4) second time heating: heating technique is basic to be heated identical with first time, but forging waste heat when can utilize pulling, make heat time heating time and temperature retention time shorten accordingly；5) head jumping-up: forging equipment: 1.5t flat-die hammer, adopt forging manipulator clamping mould, first by mould and die preheating to 200～250 DEG C before jumping-up, again heated blank is put into jumping-up molding in mould, owing to Upsetting degree is too big, it is easy to produce forge crack, therefore, head can not shape by One-time forging, it is necessary to two fire；6) heat treatment after forging: carry out solution strengthening process after forging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410721219.0A CN105710265A (en) | 2014-12-03 | 2014-12-03 | Forging process for vent valve forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410721219.0A CN105710265A (en) | 2014-12-03 | 2014-12-03 | Forging process for vent valve forming die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105710265A true CN105710265A (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410721219.0A Pending CN105710265A (en) | 2014-12-03 | 2014-12-03 | Forging process for vent valve forming die |
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| CN (1) | CN105710265A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106825376A (en) * | 2017-01-23 | 2017-06-13 | 温州电泰阀门有限公司 | A kind of valve body forging technology |
| CN108160905A (en) * | 2017-12-25 | 2018-06-15 | 株洲中车天力锻业有限公司 | A kind of locomotive shaft forging molding process |
| CN114346605A (en) * | 2021-12-30 | 2022-04-15 | 苏州昆仑重型装备制造有限公司 | Anti-cracking machining process for F91 large valve body die forging |
-
2014
- 2014-12-03 CN CN201410721219.0A patent/CN105710265A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106825376A (en) * | 2017-01-23 | 2017-06-13 | 温州电泰阀门有限公司 | A kind of valve body forging technology |
| CN108160905A (en) * | 2017-12-25 | 2018-06-15 | 株洲中车天力锻业有限公司 | A kind of locomotive shaft forging molding process |
| CN114346605A (en) * | 2021-12-30 | 2022-04-15 | 苏州昆仑重型装备制造有限公司 | Anti-cracking machining process for F91 large valve body die forging |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160629 |
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| WD01 | Invention patent application deemed withdrawn after publication |