CN108160891A - A kind of center carries the forged shaft free forging method of blind hole - Google Patents
A kind of center carries the forged shaft free forging method of blind hole Download PDFInfo
- Publication number
- CN108160891A CN108160891A CN201611115874.7A CN201611115874A CN108160891A CN 108160891 A CN108160891 A CN 108160891A CN 201611115874 A CN201611115874 A CN 201611115874A CN 108160891 A CN108160891 A CN 108160891A
- Authority
- CN
- China
- Prior art keywords
- forging
- forged shaft
- blind hole
- fetal membrane
- forged
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- B21J5/10—Piercing billets
-
- 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
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention belongs to technical field of forging, and in particular to a kind of center carries the forging free forging method of blind hole.Usual forged shaft is after being heated by bar, is shaped by pre- shape forging dies, and then carrying out die forging using particular manufacturing craft is made forging finished product.But due in the above method, the central blind hole of forged shaft needs to manufacture uplink mold to complete, there is no the concentricity for ensureing forging using any measure in forging process, cause that forging is costly, process is more, heating times are more, energy waste is big, and be extremely difficult to central blind hole and the concentricity requirement of forged shaft outer circle and economic benefit requirement.The present invention solves the problems, such as the concentricity of forged shaft of the center with blind hole using the method for open die forging, the fetal membrane that a prefabricated monoblock type inner cavity matches with forged shaft shape, the shape and size of the fetal membrane inner cavity match respectively with the shape and size of forged shaft, reduce the financial cost of forging.
Description
Technical field
The invention belongs to technical field of forging, and in particular to a kind of center carries the forging free forging method of blind hole.
Background technology
Usual forged shaft is after being heated by bar, is shaped by pre- shape forging dies, then carries out mould using particular manufacturing craft
It is forged into forging finished product.But since in the above method, the central blind hole of forged shaft needs to manufacture uplink mold to complete, forging
In the process without ensureing the concentricity of forging using any measure, cause that forging is costly, process is more, heating times are more, the energy
Waste is big, and is extremely difficult to central blind hole and the concentricity requirement of forged shaft outer circle and economic benefit requirement.
Invention content
The technical problems to be solved by the invention are：Forged shaft of the center with blind hole is solved using the method for open die forging
Concentricity problem, and reduce the financial cost of forging.
The technical scheme is that：In order to ensure center with blind hole forged shaft forging process in concentricity and
The problem of forging financial cost is high proposes a kind of forging method of forged shaft of center with blind hole.
The fetal membrane that a monoblock type inner cavity prefabricated first and forged shaft shape match, the shape of the fetal membrane inner cavity and
Size matches respectively with the shape and size of forged shaft.
Secondly prefabricated centralized positioning is bicyclic, the outer circle of outer shroud in the same direction into no shoulder claw, diameter with outside forging
Wide size matches；Interior ring size and forging blind hole size and punch size match, and bicyclic uniformly distributed by 120 ° or 60 °
Steel plate welds.The bicyclic no shoulder claw vertical direction of the centralized positioning and anchor ring working face without protrusion (i.e. without
Shoulder), principle is indeformable when being forged on hammer to ensure, general thickness is used to be made for 5mm-10mm steel plates.Without shoulder claw height
It is the 1/3~1/2 of forging height, unstability and is not conveniently operated as possible as principle during working.
A round as a ball end is pulled out after first bar is heated during forging in an axial direction, the prefabricated fetal membrane bottom to be smoothly put into.
In the case of ensureing that upset ratio is no more than 2~3.0, make forging bar portion and head not unstability as possible, one end of pulling is put into tire
Film unitary rotation and repeatedly jumping-up height to there are 3~5mm it is under-voltage when, by prefabricated centralized positioning it is bicyclic be positioned over fetal membrane it
Above and without shoulder claw and fetal membrane keep cocurrent and parallel.Prefabricated mating punch is put into bicyclic inner ring, punch size should be with
Forging blind hole matches, and then ensures to tap in the case of coaxial using clamp, 1/3~1/4 height of punch is made to be bumped into forging
Part ontology, then bang shape, and after rotation fetal membrane and correct to suitable requirement for height, so as to which the center of completing carries blind hole
Forged shaft forging.
The bicyclic fetal membrane of the centralized positioning and centralized positioning is bicyclic that mould steel can be used, it is preferential to select Cr-Ni-Mo systems mould
Have steel, preferably 5CrNiMo mould steel.
The beneficial effects of the invention are as follows：It is bicyclic to solve centralized positioning by using effective tooling and free forging method
The problem of concentricity and higher forging cost.
Specific embodiment
Below by specific embodiment, the present invention is further described in detail：
The part of certain type carries the forged shaft of blind hole for the center of 30Ni4CrMoA materials, need to be made after die forging is forged
Into.Forged shaft need to ensure concentricity requirement, and forging's block dimension is：Height 110mm, head outer diameter 120mm；Height dimension is
The cylinder of 20mm, bar portion are 3 ° of taper, and tip diameter is the round platform of 190mm；The ball of a diameter of 140mm × 35mm of central blind hole
The arc transition of hat, round platform and cylinder R50mm.It is required that concentricity≤1.0mm of blind hole and forging outer circle.
The 30Ni4CrMoA bars of diameter 150mm, long 120mm, forging side using the present invention are selected according to above-mentioned requirements
Method：First using 5CrNiMo mould steel as the prefabricated fetal membrane tooling of raw material.Then a prefabricated monoblock type inner cavity and forging shape phase
The fetal membrane matched, chamber size matches with forging appearance and size in fetal membrane, uses small angle as possible in the case where ensureing smooth depanning
Depanning is spent, depanning angle is 3 °.Fetal membrane upper and lower surface flatness is not more than 1mm, and surface of internal cavity roughness is Ra3.2.Outside fetal membrane
Shape be outer diameter 350mm, cylinder highly identical with inner cavity, surface roughness Ra12.5.
Secondly a prefabricated outer circle and thickness are 350mm × 5mm, band is there are three in the same direction without shoulder claw, and size is
35mm × 15mm × 5mm is at a right angle and internal diameter and thickness are 140mm × 5mm donuts, and bicyclic 120 ° of use is uniformly
Three 52.5mm × 15mm × 5mm steel plates welding, round and smooth weld bond part of polishing after welding.
A last prefabricated outer circle and height dimension are 140mm × 35mm, and outer arc surface roughness is Ra3.2, remaining table
Surface roughness is the spherical crown of Ra6.3.
Forging process is：The 30Ni4CrMoA bars of diameter 150mm, long 120mm are first placed in heating zone and are heated to
3T open die forgings pull out circular cone for a diameter of 120mm × 100mm in an end in an axial direction after forty minutes for 1130 DEG C of ± 20 DEG C of heat preservations.It will
One end of pulling is put into fetal membrane unitary rotation, when jumping-up height is to 115mm repeatedly, is positioned over prefabricated centralized positioning is bicyclic
Cocurrent and parallel should be kept on fetal membrane and without shoulder claw with fetal membrane.Prefabricated mating punch is put into bicyclic inner ring, then
Using clamp, in the case where ensureing coaxially, first tap makes the 10mm of punch highly be bumped into forging body, and then bang forming turns
It after dynamic fetal membrane and corrects to height to require, so as to the forging of forged shaft of the center of completing with blind hole.
The concentricity of the forging meets the requirements after testing, reduces die manufacturing cost, reduces production procedure, and meet
The type aircarft engine parts it is prepared needed for forging concentricity requirement.
Claims (7)
1. a kind of center carries the forged shaft free forging method of blind hole, which is characterized in that this method includes the following steps：
First, the fetal membrane that a prefabricated monoblock type inner cavity matches with forged shaft shape；
Secondly, a prefabricated centralized positioning is bicyclic, and the outer circle of outer shroud, without shoulder claw, can be fixed on forging at least three
In part gabarit；Interior ring size and forging blind hole size and punch size match, and bicyclic is welded by uniformly distributed steel plate；
Then, forge piece blank reheating is first put into the prefabricated fetal membrane bottom during forging, be connected in prefabricated centralized positioning is bicyclic
On fetal membrane, punch being put into inner ring and uses clamp righting, tap punch makes its 1/3~1/4 height be bumped into forging body,
Then bang forming, so as to which the center of completing carries the forged shaft of blind hole.
2. forged shaft free forging method according to claim 1, it is characterised in that：The fetal membrane and centralized positioning
It is bicyclic to use mould steel.
3. forged shaft free forging method according to claim 2, it is characterised in that：Select Cr-Ni-Mo systems mold
Steel.
4. forged shaft free forging method according to claim 3, it is characterised in that：Select 5CrNiMo mould steel.
5. forged shaft free forging method according to claim 1, it is characterised in that：Lead between the inner ring and outer shroud
Cross 120 ° or 60 ° uniformly distributed steel plate welding.
6. forged shaft free forging method according to claim 1, it is characterised in that：The no shoulder claw uses thickness
Steel plate for 5mm~10mm makes.
7. forged shaft free forging method according to claim 1, it is characterised in that：The height of no shoulder claw is forging
The 1/3~1/2 of height unstability and is not conveniently operated as possible as principle during working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611115874.7A CN108160891B (en) | 2016-12-07 | 2016-12-07 | A kind of center has the forged shaft free forging method of blind hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611115874.7A CN108160891B (en) | 2016-12-07 | 2016-12-07 | A kind of center has the forged shaft free forging method of blind hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108160891A true CN108160891A (en) | 2018-06-15 |
| CN108160891B CN108160891B (en) | 2019-08-02 |
Family
ID=62526164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611115874.7A Active CN108160891B (en) | 2016-12-07 | 2016-12-07 | A kind of center has the forged shaft free forging method of blind hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108160891B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114433759A (en) * | 2021-12-15 | 2022-05-06 | 陕西宏远航空锻造有限责任公司 | Asymmetric and large-section-ratio y-shaped raw block forming method and device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010089154A (en) * | 2008-10-10 | 2010-04-22 | Toyota Motor Corp | Method and apparatus for manufacturing hollow article, and hollow article |
| CN104070129A (en) * | 2014-06-06 | 2014-10-01 | 济南中森机械制造有限公司 | Hot extrusion forging die for pipe with flange and deep blind taper hole shaft and forging technology thereof |
| CN203936662U (en) * | 2014-06-23 | 2014-11-12 | 十堰合骏实业有限公司 | A kind of output shaft dicyclo positioning fixture |
| CN105728616A (en) * | 2014-12-10 | 2016-07-06 | 陕西宏远航空锻造有限责任公司 | Free forging method for central hollow trapezoidal forged piece |
-
2016
- 2016-12-07 CN CN201611115874.7A patent/CN108160891B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010089154A (en) * | 2008-10-10 | 2010-04-22 | Toyota Motor Corp | Method and apparatus for manufacturing hollow article, and hollow article |
| CN104070129A (en) * | 2014-06-06 | 2014-10-01 | 济南中森机械制造有限公司 | Hot extrusion forging die for pipe with flange and deep blind taper hole shaft and forging technology thereof |
| CN203936662U (en) * | 2014-06-23 | 2014-11-12 | 十堰合骏实业有限公司 | A kind of output shaft dicyclo positioning fixture |
| CN105728616A (en) * | 2014-12-10 | 2016-07-06 | 陕西宏远航空锻造有限责任公司 | Free forging method for central hollow trapezoidal forged piece |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114433759A (en) * | 2021-12-15 | 2022-05-06 | 陕西宏远航空锻造有限责任公司 | Asymmetric and large-section-ratio y-shaped raw block forming method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108160891B (en) | 2019-08-02 |
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