CN109482807A - The crude green body forging mold and its forging method of dual stage gear formed forgings - Google Patents
The crude green body forging mold and its forging method of dual stage gear formed forgings Download PDFInfo
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- CN109482807A CN109482807A CN201811555567.XA CN201811555567A CN109482807A CN 109482807 A CN109482807 A CN 109482807A CN 201811555567 A CN201811555567 A CN 201811555567A CN 109482807 A CN109482807 A CN 109482807A
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- forging
- mold
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- hole
- round estrade
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Classifications
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- 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
- B21K1/28—Making machine elements wheels; discs
- B21K1/30—Making machine elements wheels; discs with gear-teeth
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The present invention discloses the crude green body forging mold and its forging method of dual stage gear formed forgings, and solution prior art material waste is more, and both ends step forging surplus is big, upsetting process both ends root is also easy to produce folding, crack defect, the easy bias of forging is scrapped, and forging times are more, deform the problems such as uneven.Crude green body forging mold includes master mold and pressure forging mold, and pressure forging mold sets top round estrade forging hole, and master mold facility presses forging mold accommodating hole, middle part cylindrical body forging hole and lower part round estrade to forge hole.Forging method are as follows: master mold is put on forging anvil, it is put into master mold after forging base is made in blank, pressure forging mold is put into pressure forging mold accommodating hole, finally pressure forging mold is completely forced into downwards in pressure forging mold accommodating hole with hydrostatic forging pressure anvil.The present invention can form for direct one fiery time, can effectively avoid forging eccentric, greatly save the use of forged material, reduce forging surplus, saving forging cost.
Description
Technical field
The present invention relates to the crude green body forging mold of dual stage gear formed forgings and its forging methods.
Background technique
Dual stage gear formed forgings, have batch it is small, specification type is more, even forging step with intermediate step drop greatly, both ends
The characteristics such as stepped diameters are small and length is short require forging overall deformation and performance etc. each as mechanical equipment key components and parts
Item index is uniform.The dual stage gear formed forgings forged need to meet the requirement of following standard:
Ultrasonic examination is by II grade of JB/T500-15-2007 execution；
Grain size is not less than 6 grades by GB/T6394-2002 evaluation；
Forging mechanical performance is checked and accepted by GB/T3077-2015 detection；
Forging banded structure is not higher than 2 grades by GB/T13299-1991 evaluation；
Macrostructure provides that detection is checked and accepted by GB/T266 and GB/T1979 standard scale 3.
Therefore, there are following difficult points for forging dual stage gear formed forgings: (1) both ends step is forged tired with open die forging mode
It is difficult；(2) forging production process moderate heat time is more, it is difficult to guarantee that each position distortions are uniform；(3) forging surplus is excessive.
The common forging method of the prior art are as follows: method one, (1) blank are pulled out to both ends step excircle dimension, are reused
Position is to forging's block dimension among drain cap jumping-up, and in the actual production process because both ends outer diameter of step size is small, billet weight weight
Etc. reasons cause blank to pull out to both ends step excircle dimension Φ 180 × 1000, be less than considerably beyond forging jumping-up ratio of height to diameter
2.5 this requirement, and can not jumping-up centre position (as shown in Figure 7).Therefore, the prior art again improves the method, processes
Excircle dimension Φ 250 × 620 after drain cap inner hole pulls out workpiece to Φ 250, such ratio of height to diameter is less than 2.5 (as shown in Figure 8), dress
Position molding among jumping-up after drain cap.Waste of material is more when this method is forged, and forging bias scraps, both ends step forging surplus
Greatly, the features such as forging times are more, and deformation is uneven.
Both ends are pulled into taper during pulling by method two, blank, conveniently enter mould, and then position is extremely forged among jumping-up again
Part size (as shown in Figure 9) be easy to cause the recessed heart in end face when pulling out taper because both ends coining length is short when this method is forged,
Both ends root is also easy to produce the defects of folding, crackle in upsetting process, and forging operation difficulty is big, and forging bias scraps, forging times
It is more, deform the features such as uneven.
Summary of the invention
The technical problem to be solved by the present invention is providing crude green body forging mold and its forging side of dual stage gear formed forgings
Method, solution prior art waste of material in forging is more, and both ends step forging surplus is big, and both ends root easily produces in upsetting process
The defects of raw folding, crackle, the easy bias of forging is scrapped, and forging times are more, deform the problems such as uneven.
To achieve the above object, The technical solution adopted by the invention is as follows:
The crude green body forging mold of dual stage gear formed forgings, the dual stage gear formed forgings include into a single integrated structure upper
Portion's round estrade, middle part cylindrical body and lower part round estrade, the major diameter end face of the top round estrade are connected to the middle part cylindrical body
Top surface center, the major diameter end face of the lower part round estrade be connected to the middle part cylindrical body bottom surface center, and it is described on
The size of portion's round estrade, middle part cylindrical body and lower part round estrade be respectively 180~210mm of Φ × 85mm, Φ 455mm × 110m and
210~180mm of Φ × 85mm, the crude green body forging mold include in tubular master mold and pressure forging mold, institute
State the axial top round estrade forging hole offered for forging the top round estrade in center of pressure forging mold, the master
The center of mold is axial to offer pressure forging mold accommodating hole, the middle part cylindrical body for being sequentially distributed and being interconnected from top to bottom
It forges hole and lower part round estrade forges hole, the pressure forging mold accommodating hole is described for accommodating the pressure forging mold
Cylindrical body forging hole in middle part is for forging the middle part cylindrical body, and the lower part round estrade forging hole is for forging the lower part circle
Stage body.
Further, the outer dimension of the master mold is Φ 700mm × 280m.
Further, the outer dimension of the pressure forging mold is Φ 455mm × 85m.
Further, the size of the pressure forging mold accommodating hole is Φ 460mm × 85m.
Further, the size in middle part cylindrical body forging hole is Φ 455mm × 110m.
Further, the size in lower part round estrade forging hole is 210~180mm of Φ × 85mm.
Further, the size in top round estrade forging hole is 180~210mm of Φ × 85mm.
The forging method of the crude green body forging mold of dual stage gear formed forgings, comprising the following steps:
The forging base of the round pie having a size of Φ 440 × 165 is made in blank by step 1, base；
Master mold is horizontally placed on forging anvil by step 2, and lower part round estrade forges hole downward, and pressure forging mold holds
Set hole upward；
The forging base made is placed in the cylindrical body forging hole of middle part by step 3, tips upside down on pressure forging mold apply later
It in pressure forging mold accommodating hole and is shelved on forging base, the major diameter that top round estrade forges hole is face-down；
Step 4, by hydrostatic forging pressure anvil straight down contact pressure forging mold top surface and press straight down,
Until pressure forging mold, which is all pressed into pressure forging mold accommodating hole, to be forged into dual stage gear for forging base compacting
Formed forgings crude green body.
Further, in the step 1, the blank is 18Cr2Ni4W or 20Cr2Ni4.
Further, in the step 4, when the pressure forging mold is all pressed into pressure forging mold accommodating hole,
The top surface of the pressure forging mold is flushed with the top surface of the master mold.
Compared with prior art, the invention has the following advantages:
Crude green body forging mold structure of the present invention is simple, design is scientific and reasonable, easy to use, the both ends step forging in forging
Surplus is small, and waste of material is less, can effectively avoid forging bias and scraps, and one fire time of forging is i.e. plastic.Forging method of the present invention
It is forged, is oriented to using stamp forging mould, forging surplus is small, extrusion forming follows metal flow and manages using this crude green body forging mold
It reads, using a direct fire time molding of extrusion forging mode, the dual stage gear formed forgings forged are not only able to satisfy items and refer to
Mark requires, and can also effectively avoid forging eccentric, greatlys save the use of forged material, the dual stage gear that the present invention is forged
The final dual stage gear formed forgings finished size of formed forgings crude green body is 160~190mm of Φ × 74mm, Φ 438mm × 100mm
With 190~160mm of Φ × 75mm, and the size for the dual stage gear formed forgings crude green body that this present invention is forged be Φ 180~
210mm × 85mm, Φ 455mm × 110m and Φ 210~180mm × 85mm, forging surplus is few, can effectively save forging
Cost.
Detailed description of the invention
Fig. 1 is master mold structural schematic diagram of the present invention.
Fig. 2 is present invention pressure forging mold structural schematic diagram.
Fig. 3 is dual stage gear formed forgings crude green body structural schematic diagram of the present invention.
Fig. 4 is present invention forging blank structure schematic diagram.
Fig. 5 is that present invention forging base and pressure forging mold are packed into schematic diagram in master mold.
Fig. 6 is that the forging mold of the invention that will press all is pressed into state diagram in pressure forging mold accommodating hole.
Fig. 7 is the as-forged condition figure of existing forging method one in background technique.
Fig. 8 is the improved as-forged condition figure of existing forging method one in background technique.
Fig. 9 is the as-forged condition figure of existing forging method two in background technique.
Wherein, the corresponding title of appended drawing reference are as follows:
1- master mold, 2- pressure forging mold, the top 3- round estrade, the middle part 4- cylindrical body, the lower part 5- round estrade, the middle part 6-
Cylindrical body forges hole, the lower part 7- round estrade forging hole, the top 8- round estrade forging hole, 9- pressure forging mold accommodating hole.
Specific embodiment
The invention will be further described with embodiment for explanation with reference to the accompanying drawing, and mode of the invention includes but not only limits
In following embodiment.
As shown in Figure 1-3, the crude green body forging mold of dual stage gear formed forgings provided by the invention.Dual stage of the present invention
Gear formed forgings include into a single integrated structure top round estrade 3, middle part cylindrical body 4 and lower part round estrade 5, the top rotary table
The major diameter end face of body 3 is connected to the top surface center of the middle part cylindrical body 4, and the major diameter end face of the lower part round estrade 5 is connected to
The bottom surface center of the middle part cylindrical body 4, and the size of the top round estrade 3, middle part cylindrical body 4 and lower part round estrade 5
Respectively 180~210mm of Φ × 85mm, Φ 455mm × 110m and Φ 210~180mm × 85mm, the crude green body forging mold packet
It including in tubular master mold 1 and pressure forging mold 2, the outer dimension of the master mold 1 is Φ 700mm × 280m,
The outer dimension of the pressure forging mold 2 is Φ 455mm × 85m, and the center of the pressure forging mold 2 is axial to offer use
Forge hole 8 in the top round estrade for forging the top round estrade 3, the size in top round estrade forging hole 8 be Φ 180~
210mm × 85mm, the center of the master mold 1 is axial to offer the pressure forge mould for being sequentially distributed and being interconnected from top to bottom
Have accommodating hole 9, middle part cylindrical body forging hole 6 and lower part round estrade and forges hole 7, the size of the pressure forging mold accommodating hole 9
Size for Φ 460mm × 85m, middle part cylindrical body forging hole 6 is Φ 455mm × 110m, the lower part round estrade forging
The size in hole 7 is 210~180mm of Φ × 85mm, and the pressure forging mold accommodating hole 9 is for accommodating the pressure forging mold
2, the middle part cylindrical body forging hole 6 is for forging the middle part cylindrical body 4, and the lower part round estrade forging hole 7 is for forging
The lower part round estrade 5.
Crude green body forging mold structure of the present invention is simple, design is scientific and reasonable, easy to use, the both ends step forging in forging
Surplus is small, and waste of material is less, can effectively avoid forging bias and scraps, and one fire time of forging is i.e. plastic.
As Figure 4-Figure 6, the crude green body forging mold provided by the invention using dual stage gear formed forgings forges dual stage tooth
Take turns the forging method of formed forgings crude green body, comprising the following steps:
The forging base of the round pie having a size of Φ 440 × 165 is made in blank by step 1, base, and the blank is selected
18Cr2Ni4W or 20Cr2Ni4；
Master mold is horizontally placed on forging anvil by step 2, and lower part round estrade forges hole downward, and pressure forging mold holds
Set hole upward；
The forging base made is placed in the cylindrical body forging hole of middle part by step 3, tips upside down on pressure forging mold apply later
It in pressure forging mold accommodating hole and is shelved on forging base, the major diameter that top round estrade forges hole is face-down；
Step 4, by hydrostatic forging pressure anvil straight down contact pressure forging mold top surface and press straight down,
Until pressure forging mold, which is all pressed into pressure forging mold accommodating hole, to be forged into dual stage gear for forging base compacting
Formed forgings crude green body, when the pressure forging mold is all pressed into pressure forging mold accommodating hole, the pressure forging mold
Top surface flushed with the top surface of the master mold.
Forging method of the present invention is forged using this crude green body forging mold, using stamp forging mould guiding, forging surplus it is small,
Extrusion forming follows metal flow theory, and using a direct fire time molding of extrusion forging mode, the dual stage gear forged is different
Swaged forging part is not only able to satisfy indices requirement, but also can also effectively avoid forging eccentric, greatlys save the use of forged material,
The final dual stage gear formed forgings finished size of the dual stage gear formed forgings crude green body that is forged of the present invention be Φ 160~
190mm × 74mm, Φ 438mm × 100mm and Φ 190~160mm × 75mm, and the dual stage gear that this present invention is forged is different
The size of swaged forging part crude green body is 180~210mm of Φ × 85mm, Φ 455mm × 110m and Φ 210~180mm × 85mm, forging
Surplus is few, can effectively save forging cost.
Above-described embodiment is only one of the preferred embodiment of the present invention, should not be taken to limit protection model of the invention
It encloses, as long as that in body design thought of the invention and mentally makes has no the change of essential meaning or polishing, is solved
The technical issues of it is still consistent with the present invention, should all be included within protection scope of the present invention.
Claims (10)
1. the crude green body forging mold of dual stage gear formed forgings, which is characterized in that the dual stage gear formed forgings include into one
Top round estrade (3), middle part cylindrical body (4) and the lower part round estrade (5) of body structure, the bigger diameter end of the top round estrade (3)
Face is connected to the top surface center of the middle part cylindrical body (4), and the major diameter end face of the lower part round estrade (5) is connected to the middle part
The bottom surface center of cylindrical body (4), and the size of the top round estrade (3), middle part cylindrical body (4) and lower part round estrade (5)
Respectively 180~210mm of Φ × 85mm, Φ 455mm × 110m and Φ 210~180mm × 85mm, the crude green body forging mold packet
It includes in tubular master mold (1) and pressure forging mold (2), the center of pressure forging mold (2) is axial to be opened up
There is top round estrade forging hole (8) for forging the top round estrade (3), the center of the master mold (1) is axial to be opened up
There are the pressure forging mold accommodating hole (9) for being sequentially distributed and being interconnected from top to bottom, middle part cylindrical body forging hole (6) and lower part
Round estrade forges hole (7), and the pressure forging mold accommodating hole (9) is for accommodating the pressure forging mold (2), the middle part
For forging the middle part cylindrical body (4), lower part round estrade forging hole (7) is described for forging for cylindrical body forging hole (6)
Lower part round estrade (5).
2. the crude green body forging mold of dual stage gear formed forgings according to claim 1, which is characterized in that the master mold
(1) outer dimension is Φ 700mm × 280m.
3. the crude green body forging mold of dual stage gear formed forgings according to claim 2, which is characterized in that the pressure forging
The outer dimension that modeling has (2) is Φ 455mm × 85m.
4. the crude green body forging mold of dual stage gear formed forgings according to claim 3, which is characterized in that the pressure forging
The size that modeling has accommodating hole (9) is Φ 460mm × 85m.
5. the crude green body forging mold of dual stage gear formed forgings according to claim 4, which is characterized in that the middle part circle
The size that cylinder forges hole (6) is Φ 455mm × 110m.
6. the crude green body forging mold of dual stage gear formed forgings according to claim 5, which is characterized in that the lower part circle
The size that stage body forges hole (7) is 210~180mm of Φ × 85mm.
7. the crude green body forging mold of dual stage gear formed forgings according to claim 6, which is characterized in that the top circle
The size that stage body forges hole (8) is 180~210mm of Φ × 85mm.
8. the forging method of the crude green body forging mold of dual stage gear formed forgings described in -7 any one according to claim 1,
It is characterized in that, comprising the following steps:
The forging base of the round pie having a size of Φ 440 × 165 is made in blank by step 1, base；
Master mold is horizontally placed on forging anvil by step 2, and lower part round estrade forges hole downward, and press forging mold accommodating hole
Upward；
The forging base made is placed in the cylindrical body forging hole of middle part by step 3, and pressure forging mold is tipped upside down on pressure forging later
It in modeling tool accommodating hole and is shelved on forging base, the major diameter that top round estrade forges hole is face-down；
Step 4, by hydrostatic forging pressure anvil straight down contact pressure forging mold top surface and press straight down, up to
Pressure forging mold, which is all pressed into pressure forging mold accommodating hole, can be forged into forging base compacting dual stage gear abnormal shape
Forging crude green body.
9. forging method according to claim 8, which is characterized in that in the step 1, the blank is
18Cr2Ni4W or 20Cr2Ni4.
10. forging method according to claim 9, which is characterized in that in the step 4, the pressure forging mold is complete
When in portion's indentation pressure forging mold accommodating hole, the top surface of the pressure forging mold is flushed with the top surface of the master mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811555567.XA CN109482807A (en) | 2018-12-19 | 2018-12-19 | The crude green body forging mold and its forging method of dual stage gear formed forgings |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811555567.XA CN109482807A (en) | 2018-12-19 | 2018-12-19 | The crude green body forging mold and its forging method of dual stage gear formed forgings |
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| CN109482807A true CN109482807A (en) | 2019-03-19 |
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ID=65710915
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|---|---|---|---|
| CN201811555567.XA Pending CN109482807A (en) | 2018-12-19 | 2018-12-19 | The crude green body forging mold and its forging method of dual stage gear formed forgings |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110773961A (en) * | 2019-11-06 | 2020-02-11 | 无锡宏达重工股份有限公司 | Machining method of speed ratio wheel |
| CN112589028A (en) * | 2020-11-30 | 2021-04-02 | 贵州航天新力科技有限公司 | Eccentric forging forming die structure |
| CN116851624A (en) * | 2023-08-07 | 2023-10-10 | 纽威精密锻造(溧阳)有限公司 | A method for forging eccentric valve body for Christmas trees |
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| JPH05154599A (en) * | 1991-12-02 | 1993-06-22 | Aida Eng Ltd | Method for forging spur gear |
| JP2000005838A (en) * | 1998-06-22 | 2000-01-11 | Aida Eng Ltd | Plastic working method for member with hole and its equipment |
| JP2001232440A (en) * | 2000-02-24 | 2001-08-28 | Toyota Motor Corp | Helical gear manufacturing method |
| CN206578246U (en) * | 2016-12-30 | 2017-10-24 | 四川民盛特钢锻造有限公司 | A kind of special-shaped forging mold |
| CN207615604U (en) * | 2017-11-02 | 2018-07-17 | 西安煤矿机械有限公司 | A kind of new gear forging tooling |
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2018
- 2018-12-19 CN CN201811555567.XA patent/CN109482807A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05154599A (en) * | 1991-12-02 | 1993-06-22 | Aida Eng Ltd | Method for forging spur gear |
| JP2000005838A (en) * | 1998-06-22 | 2000-01-11 | Aida Eng Ltd | Plastic working method for member with hole and its equipment |
| JP2001232440A (en) * | 2000-02-24 | 2001-08-28 | Toyota Motor Corp | Helical gear manufacturing method |
| CN206578246U (en) * | 2016-12-30 | 2017-10-24 | 四川民盛特钢锻造有限公司 | A kind of special-shaped forging mold |
| CN207615604U (en) * | 2017-11-02 | 2018-07-17 | 西安煤矿机械有限公司 | A kind of new gear forging tooling |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110773961A (en) * | 2019-11-06 | 2020-02-11 | 无锡宏达重工股份有限公司 | Machining method of speed ratio wheel |
| CN112589028A (en) * | 2020-11-30 | 2021-04-02 | 贵州航天新力科技有限公司 | Eccentric forging forming die structure |
| CN112589028B (en) * | 2020-11-30 | 2023-02-28 | 贵州航天新力科技有限公司 | Eccentric forging forming die structure |
| CN116851624A (en) * | 2023-08-07 | 2023-10-10 | 纽威精密锻造(溧阳)有限公司 | A method for forging eccentric valve body for Christmas trees |
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