CN112756538A - Near-net forming die and method for forging hinge beam of refined steel stone pressure equipment - Google Patents
Near-net forming die and method for forging hinge beam of refined steel stone pressure equipment Download PDFInfo
- Publication number
- CN112756538A CN112756538A CN202110216885.9A CN202110216885A CN112756538A CN 112756538 A CN112756538 A CN 112756538A CN 202110216885 A CN202110216885 A CN 202110216885A CN 112756538 A CN112756538 A CN 112756538A
- Authority
- CN
- China
- Prior art keywords
- die
- groove
- forming
- blank
- forging
- 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.)
- Granted
Links
- 238000005242 forging Methods 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 18
- 239000010959 steel Substances 0.000 title claims abstract description 18
- 239000004575 stone Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 238000004080 punching Methods 0.000 claims description 19
- 238000010272 near-net-shape forging Methods 0.000 claims 1
- 239000000835 fiber Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Images
Classifications
-
- 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
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/025—Closed die forging
Abstract
A near-net forming die and a forming method for forging a hinge beam of refined steel stone pressure equipment belong to the technical field of metal forging and processing, and particularly relate to a near-net forming die and a forming method for forging a hinge beam of refined steel stone pressure equipment. The invention provides a near-net forming die and a near-net forming method for forging a hinge beam of fine steel stone pressure equipment. The invention discloses a near-net forming die for forging a hinge beam of refined steel stone pressure equipment, which comprises an upper die, a lower die and two horizontal stamping dies, and is characterized in that: the center of the lower part of the upper die is provided with a central positioning bulge, and an annular groove which is sunken upwards is arranged outside the central positioning bulge; the lower die is a groove-shaped body with a U-shaped cross section, a circular groove is arranged in the center of the bottom of the groove-shaped body, two sides of the bottom of the groove-shaped body are inclined planes, and the two inclined planes are oppositely arranged, so that a groove with a large upper part and a small lower part is formed at the bottom of the groove-shaped body.
Description
Technical Field
The invention belongs to the technical field of metal forging processing, and particularly relates to a near-net forming die and a near-net forming method for forging a hinge beam of fine steel stone pressure equipment.
Background
The hinge beam is a main part of the diamond press, is large in stress, complex in shape and high in performance index requirement, and is forged to form a complete fiber tissue state as much as possible.
The width L of the hinge beam forging is 1960mm, the thickness H is 900mm, the size and the weight are large (see figures 11 and 12), and if free forging is adopted, the allowance is overlarge; by adopting the traditional upper and lower die forging method, the required press is extremely large, at least more than 3 ten thousand tons, the damage of a tool is serious, the consumption of a die is large, and finally the allowance of a forged piece can not be reduced.
Disclosure of Invention
The invention aims at the problems and provides a near-net forming die and a forming method for forging a hinge beam of fine steel stone pressure equipment.
In order to achieve the above purpose, the invention adopts the following technical scheme that the near-net forming die for forging the hinge beam of the refined steel stone pressure equipment comprises an upper die, a lower die and two horizontal punching dies, and is characterized in that: the center of the lower part of the upper die is provided with a central positioning bulge, and an annular groove which is sunken upwards is arranged outside the central positioning bulge; the lower die is a groove-shaped body with a U-shaped section, a circular groove is arranged in the center of the bottom of the groove-shaped body, two sides of the bottom of the groove-shaped body are inclined planes, and the two inclined planes are oppositely arranged, so that a groove with a large upper part and a small lower part is formed at the bottom of the groove-shaped body; the outer contour of the horizontal punching die is matched with the groove-shaped body of the lower die, the center of the inner surface of the horizontal punching die is provided with a forming groove, two sides of the forming groove are inclined forming inclined planes, and the outer sides of the two forming inclined planes are forming planes.
As a preferable aspect of the present invention, a mold locking mechanism is provided between the upper mold and the lower mold.
The invention discloses a near-net forming method for forging a hinge beam of refined steel stone pressure equipment, which is characterized by comprising the following steps of: the whole blank is processed into a round cake shape, and the lower part of the blank is processed with a matching surface matched with the inner inclined surface of the lower die; placing the rough machined blank into a lower die, and automatically positioning the workpiece under the matching of the matching surface and the inclined surface of the lower die; pressing the upper die; the center of the blank is extruded by the center positioning bulge of the upper die, the upper part of the blank metal flows to the annular groove, and the lower part of the blank metal flows to the inclined surface and the circular groove at the bottom of the lower die; completing one-time stamping after the upper die is in place; locking the upper die and the lower die through a die locking mechanism, closing the two horizontal punching dies, and forming the opposite surfaces of the blank metal and the horizontal punching dies under the action of a forming groove, a forming inclined plane and a forming plane; and (4) allowing redundant blank metal to flow to the inner side surface of the lower die, and completing the forming of the two surfaces and the secondary punching under the action of the inner side surface of the lower die to obtain the workpiece.
In a preferred embodiment of the present invention, the lower surface of the blank and the bottom of the inclined surface are provided with molding spaces.
The invention has the beneficial effects that: according to the near-net forming die and the forming method for the hinge beam forging of the refined steel stone pressure equipment, disclosed by the invention, the blank can be formed into a complex shape by applying multiple forces, particularly, the hinge beam is formed by multiple forces, the allowance of a forging piece is greatly reduced, and the production efficiency is higher than that of free forging and traditional die forging. The hinge beam forge piece is formed by the technology, the internal fiber structure state is more reasonable, the structure performance is better, and the service life of the press machine is prolonged.
Drawings
FIG. 1 is a schematic structural view before one-time stamping.
Fig. 2 is a schematic structural view after one-time punching.
Fig. 3 is a schematic structural view before secondary punching of the present invention.
Fig. 4 is a schematic structural view after the secondary punching of the present invention.
Fig. 5 is a schematic structural view of the upper die.
Fig. 6 is a cross-sectional view of fig. 5.
Fig. 7 is a schematic structural view of the lower mold.
Fig. 8 is a cross-sectional view of fig. 7.
Fig. 9 is a schematic view of a horizontal die.
Fig. 10 is a top view of fig. 9.
Fig. 11 is a structural schematic view of a hinge beam of the fine steel stone press apparatus.
Fig. 12 is a side half-sectional view of fig. 11.
In the drawing, 1 is a lower die, 2 is a blank, 3 is a clamping mechanism, 4 is an upper die, 5 is a horizontal punching die, 11 is an inclined surface, 12 is a groove body, 13 is a circular groove, 41 is an annular groove, 42 is a central positioning bulge, 51 is a forming inclined surface, 52 is a forming groove, and 53 is a forming plane.
Detailed Description
The invention discloses a near-net forming die for forging a hinge beam of refined steel stone pressure equipment, which comprises an upper die 4, a lower die 1 and two horizontal stamping dies 5, and is characterized in that: the center of the lower part of the upper die 4 is a central positioning bulge 42, and an annular groove 41 which is concave upwards is arranged outside the central positioning bulge 42; the lower die 1 is a groove-shaped body 12 with a U-shaped section, a circular groove 13 is arranged in the center of the bottom of the groove-shaped body 12, two sides of the bottom of the groove-shaped body 12 are both inclined surfaces 11, and the two inclined surfaces 11 are oppositely arranged, so that a groove with a large upper part and a small lower part is formed at the bottom of the groove-shaped body 12; the outer contour of the horizontal punching die 5 is matched with the groove-shaped body 12 of the lower die 1, the center of the inner surface of the horizontal punching die 5 is provided with a forming groove 52, two sides of the forming groove 52 are inclined forming inclined planes 51, and the outer sides of the two forming inclined planes 51 are forming planes 53.
As a preferred embodiment of the present invention, a clamping mechanism 3 is disposed between the upper mold 4 and the lower mold 1.
The invention discloses a near-net forming method for forging a hinge beam of refined steel stone pressure equipment, which is characterized by comprising the following steps of: the blank 2 is integrally processed into a round cake shape, and the lower part of the blank 2 is processed with a matching surface matched with the inner inclined surface 11 of the lower die 1; placing the rough machined blank 2 into the lower die 1, and automatically positioning the workpiece under the matching of the matching surface of the lower die 1 and the inclined surface 11; the upper die 4 is pressed down; the center of the blank 2 is extruded by the center positioning bulge 42 of the upper die 4, the metal upper part of the blank 2 flows to the annular groove 41, and the metal lower part of the blank 2 flows to the inclined surface 11 and the circular groove 13 at the bottom of the lower die 1; completing one-time stamping after the upper die 4 is in place; locking the upper die 4 and the lower die 1 through the die locking mechanism 3, closing the two horizontal punching dies 5, and forming the metal surface of the blank 2 opposite to the horizontal punching dies 5 under the action of a forming groove 52, a forming inclined surface 51 and a forming plane 53; and (3) allowing the redundant metal of the blank 2 to flow to the inner side surface of the lower die 1, completing the forming of the two sides at last under the action of the inner side surface of the lower die 1, and completing the secondary punching to obtain the workpiece.
In a preferred embodiment of the present invention, a molding space is provided between the lower surface of the blank 2 and the bottom of the inclined surface 11.
Example (b): the outer contour of the upper die 4 is a square of 1960 multiplied by 1960mm, and the distance from the lower surface of the central positioning bulge 42 of the upper die 4 to the highest point of the annular groove 41 is 300 mm; the distance between the inner walls of the groove-shaped bodies 12 of the lower die 1 is 1965mm, the diameter of the circular groove 13 of the lower die 1 is 1060mm, the distance from the upper surface of the lower die 1 to the lower surface of the circular groove 13 is 1830mm, and the blank 2 has a thickness of 800mm and a diameter of 1960 mm.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (4)
1. The utility model provides a near net forming die is forged to smart steel stone pressure equipment hinge roof beam, includes mould (4), lower mould (1) and two horizontal punch dies (5), its characterized in that: the center of the lower part of the upper die (4) is provided with a central positioning bulge (42), and an annular groove (41) which is sunken upwards is arranged outside the central positioning bulge (42); the lower die (1) is a groove-shaped body (12) with a U-shaped cross section, a circular groove (13) is formed in the center of the bottom of the groove-shaped body (12), inclined surfaces (11) are arranged on two sides of the bottom of the groove-shaped body (12), and the two inclined surfaces (11) are arranged oppositely to form a groove with a large upper part and a small lower part at the bottom of the groove-shaped body (12); the outer contour of the horizontal punching die (5) is matched with the groove-shaped body (12) of the lower die (1), the center of the inner surface of the horizontal punching die (5) is provided with a forming groove (52), two sides of the forming groove (52) are inclined forming inclined planes (51), and the outer sides of the two forming inclined planes (51) are forming planes (53).
2. The near-net forming die for forging the hinge beam of the fine steel stone pressure equipment as claimed in claim 1, wherein: and a mold locking mechanism (3) is arranged between the upper mold (4) and the lower mold (1).
3. A near-net forming method for forging a hinge beam of refined steel stone pressure equipment is characterized by comprising the following steps of: the blank (2) is integrally processed into a round cake shape, and the lower part of the blank (2) is processed with a matching surface matched with the inner inclined surface (11) of the lower die (1); placing the rough machined blank (2) into the lower die (1), and automatically positioning the workpiece under the matching of the matching surface of the lower die (1) and the inclined surface (11); the upper die (4) is pressed down; the center of the blank (2) is extruded by a center positioning bulge (42) of the upper die (4), the metal upper part of the blank (2) flows to the annular groove (41), and the metal lower part of the blank (2) flows to the inclined surface (11) and the circular groove (13) at the bottom of the lower die (1); completing one-time stamping after the upper die (4) is in place; the upper die (4) and the lower die (1) are locked through the die locking mechanism (3), the two horizontal punching dies (5) are closed, and the surfaces of the metal of the blank (2) opposite to the horizontal punching dies (5) are formed under the action of the forming groove (52), the forming inclined plane (51) and the forming plane (53); and (3) allowing redundant metal of the blank (2) to flow to the inner side surface of the lower die (1), and completing forming of two surfaces and secondary stamping under the action of the inner side surface of the lower die (1) to obtain a workpiece.
4. A method of near net shape forging for a fine steel pressure apparatus hinge beam according to claim 3, wherein: and forming spaces are formed in the lower surface of the blank (2) and the bottom of the inclined surface (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110216885.9A CN112756538B (en) | 2021-02-26 | 2021-02-26 | Near-net forming die and forming method for hinge beam forging of fine steel stone pressure equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110216885.9A CN112756538B (en) | 2021-02-26 | 2021-02-26 | Near-net forming die and forming method for hinge beam forging of fine steel stone pressure equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112756538A true CN112756538A (en) | 2021-05-07 |
| CN112756538B CN112756538B (en) | 2024-05-07 |
Family
ID=75704184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110216885.9A Active CN112756538B (en) | 2021-02-26 | 2021-02-26 | Near-net forming die and forming method for hinge beam forging of fine steel stone pressure equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112756538B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113857404A (en) * | 2021-10-26 | 2021-12-31 | 二重（德阳）重型装备有限公司 | Method for forging hinge beam in short process |
| CN115383029A (en) * | 2022-08-31 | 2022-11-25 | 中冶重工（唐山）有限公司 | Multidirectional die forging die for coupler knuckle forging of railway locomotive and forming process of multidirectional die forging die |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9719900D0 (en) * | 1996-09-19 | 1997-11-19 | Sanyo Special Steel Co Ltd | Method and system for warm or hot high-velocity die forging |
| JP2001030042A (en) * | 1999-07-22 | 2001-02-06 | Toyota Autom Loom Works Ltd | Manufacture of swash plate for swash type compressor |
| JP2001162348A (en) * | 1999-12-06 | 2001-06-19 | Toyota Motor Corp | Grooved member forming apparatus, and its forming method |
| NO20040634D0 (en) * | 2004-02-12 | 2004-02-12 | Raufoss Tech As | A slip process |
| CN102513482A (en) * | 2011-12-06 | 2012-06-27 | 中国科学院金属研究所 | Forging and forming method of integral hinge beam |
| WO2012090892A1 (en) * | 2010-12-28 | 2012-07-05 | 日立金属株式会社 | Closed-die forging method and method of manufacturing forged article |
| CN202343840U (en) * | 2011-12-13 | 2012-07-25 | 重庆工具厂有限责任公司 | Forging mold of middle concave forge |
| CN104259362A (en) * | 2014-10-21 | 2015-01-07 | 中国第一重型机械股份公司 | Nuclear reactor integrating lower end socket integrity profiling and forging method |
| CN104624906A (en) * | 2015-01-29 | 2015-05-20 | 西安三角航空科技有限责任公司 | Forging die and forging method |
| CN106216585A (en) * | 2016-08-24 | 2016-12-14 | 邓州市良机锻压设备制造有限公司 | Integral hinge beam closed die forging molding die and hinge beam preparation method |
| KR20170069368A (en) * | 2015-12-10 | 2017-06-21 | 주식회사 세림티앤디 | Forging Producing Method and Device |
| CN107186148A (en) * | 2017-07-13 | 2017-09-22 | 苏州昆仑重型装备制造有限公司 | The mould of rotary drum is forged on common hydraulic press |
| CN206824585U (en) * | 2017-04-24 | 2018-01-02 | 湖南巨峰科技实业有限公司 | A kind of combination die for the processing of large-scale hinge beam forging |
| WO2018045752A1 (en) * | 2016-09-10 | 2018-03-15 | 吉林大学 | Near net shape forging and moulding method for railway vehicle coupler knuckle |
| CN107900270A (en) * | 2017-12-28 | 2018-04-13 | 烟台台海材料科技有限公司 | A kind of hinge beam Integral die-forged combined die for forming and its processing hinge beam method |
| CN207839995U (en) * | 2017-12-28 | 2018-09-11 | 烟台台海材料科技有限公司 | A kind of hinge beam die forging cavity plate and the upsetting pressure punch-pin coordinated with it and forging and stamping punch-pin |
| CN109093049A (en) * | 2018-08-01 | 2018-12-28 | 西安三角防务股份有限公司 | A kind of forging mold and forging method |
| CN110508737A (en) * | 2019-08-26 | 2019-11-29 | 南京理工大学 | A kind of hub extrusion manufacturing process |
| CN214442739U (en) * | 2021-02-26 | 2021-10-22 | 辽宁北祥重工机械制造有限公司 | Near-net forming die for forging hinge beam of refined steel stone pressure equipment |
-
2021
- 2021-02-26 CN CN202110216885.9A patent/CN112756538B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9719900D0 (en) * | 1996-09-19 | 1997-11-19 | Sanyo Special Steel Co Ltd | Method and system for warm or hot high-velocity die forging |
| JP2001030042A (en) * | 1999-07-22 | 2001-02-06 | Toyota Autom Loom Works Ltd | Manufacture of swash plate for swash type compressor |
| JP2001162348A (en) * | 1999-12-06 | 2001-06-19 | Toyota Motor Corp | Grooved member forming apparatus, and its forming method |
| NO20040634D0 (en) * | 2004-02-12 | 2004-02-12 | Raufoss Tech As | A slip process |
| WO2012090892A1 (en) * | 2010-12-28 | 2012-07-05 | 日立金属株式会社 | Closed-die forging method and method of manufacturing forged article |
| CN102513482A (en) * | 2011-12-06 | 2012-06-27 | 中国科学院金属研究所 | Forging and forming method of integral hinge beam |
| CN202343840U (en) * | 2011-12-13 | 2012-07-25 | 重庆工具厂有限责任公司 | Forging mold of middle concave forge |
| CN104259362A (en) * | 2014-10-21 | 2015-01-07 | 中国第一重型机械股份公司 | Nuclear reactor integrating lower end socket integrity profiling and forging method |
| CN104624906A (en) * | 2015-01-29 | 2015-05-20 | 西安三角航空科技有限责任公司 | Forging die and forging method |
| KR20170069368A (en) * | 2015-12-10 | 2017-06-21 | 주식회사 세림티앤디 | Forging Producing Method and Device |
| CN106216585A (en) * | 2016-08-24 | 2016-12-14 | 邓州市良机锻压设备制造有限公司 | Integral hinge beam closed die forging molding die and hinge beam preparation method |
| WO2018045752A1 (en) * | 2016-09-10 | 2018-03-15 | 吉林大学 | Near net shape forging and moulding method for railway vehicle coupler knuckle |
| CN206824585U (en) * | 2017-04-24 | 2018-01-02 | 湖南巨峰科技实业有限公司 | A kind of combination die for the processing of large-scale hinge beam forging |
| CN107186148A (en) * | 2017-07-13 | 2017-09-22 | 苏州昆仑重型装备制造有限公司 | The mould of rotary drum is forged on common hydraulic press |
| CN107900270A (en) * | 2017-12-28 | 2018-04-13 | 烟台台海材料科技有限公司 | A kind of hinge beam Integral die-forged combined die for forming and its processing hinge beam method |
| CN207839995U (en) * | 2017-12-28 | 2018-09-11 | 烟台台海材料科技有限公司 | A kind of hinge beam die forging cavity plate and the upsetting pressure punch-pin coordinated with it and forging and stamping punch-pin |
| CN109093049A (en) * | 2018-08-01 | 2018-12-28 | 西安三角防务股份有限公司 | A kind of forging mold and forging method |
| CN110508737A (en) * | 2019-08-26 | 2019-11-29 | 南京理工大学 | A kind of hub extrusion manufacturing process |
| CN214442739U (en) * | 2021-02-26 | 2021-10-22 | 辽宁北祥重工机械制造有限公司 | Near-net forming die for forging hinge beam of refined steel stone pressure equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113857404A (en) * | 2021-10-26 | 2021-12-31 | 二重（德阳）重型装备有限公司 | Method for forging hinge beam in short process |
| CN115383029A (en) * | 2022-08-31 | 2022-11-25 | 中冶重工（唐山）有限公司 | Multidirectional die forging die for coupler knuckle forging of railway locomotive and forming process of multidirectional die forging die |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112756538B (en) | 2024-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101508004B (en) | Sedan gear-box axle piece cold finish-forging formation method and die | |
| CN113926973B (en) | Combined anvil die and process for forging large-scale crank throw | |
| CN101537471B (en) | Improved forging method of conical bearing inner race | |
| CN102672096A (en) | Precision die forging and shaping technical method for automobile steering knuckle rough type parts | |
| CN202539362U (en) | Small-angle conical part molding die | |
| CN112756538B (en) | Near-net forming die and forming method for hinge beam forging of fine steel stone pressure equipment | |
| CN107537966A (en) | The shaping dies and its processing technology of a kind of valley road forging | |
| CN110479938B (en) | Forging forming die and method for flange ball valve forge piece | |
| CN101402128A (en) | Self-changing gearbox flywheel bracket tray deep-drawing hammer down forming process and mould | |
| CN109482739A (en) | Formed punch blank holder integrated mould | |
| CN104438997A (en) | Free forging process for large cross forged pieces | |
| CN214442739U (en) | Near-net forming die for forging hinge beam of refined steel stone pressure equipment | |
| CN102847862A (en) | Low-pressure composite forging process for bearing ring | |
| CN202479252U (en) | Backward extrusion die for aluminum alloy wheel rim of oversize vehicle | |
| CN110170609B (en) | Precision plastic forming process and mould for ball cage cover with flange | |
| CN111940741A (en) | Powder metallurgy brake pad friction block shaping die and method | |
| CN107649586B (en) | It is a kind of for circular cone involucrum shaping dies and its manufacturing process of circular cone involucrum | |
| CN206912159U (en) | A kind of Mine Link Ring fetal membrane forging mould for not cutting off forging flow lines | |
| CN207043259U (en) | A kind of shaping dies of valley road forging | |
| CN109590422A (en) | A kind of drum-type turns to pre- forging enclosed near-net-shape technique and mold eventually | |
| CN204657375U (en) | Cold extrusion combined die | |
| CN212945424U (en) | Powder metallurgy brake lining friction block shaping die | |
| CN204320831U (en) | A kind of cold extrusion die | |
| CN208288906U (en) | A kind of mold for cold forging flake ring | |
| CN105964801A (en) | Stamping die |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |