CN114427563A - Ball pin shell and manufacturing method thereof - Google Patents
Ball pin shell and manufacturing method thereof Download PDFInfo
- Publication number
- CN114427563A CN114427563A CN202111617445.0A CN202111617445A CN114427563A CN 114427563 A CN114427563 A CN 114427563A CN 202111617445 A CN202111617445 A CN 202111617445A CN 114427563 A CN114427563 A CN 114427563A
- Authority
- CN
- China
- Prior art keywords
- ball pin
- round hole
- manufacturing
- pin shell
- blank
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 238000003754 machining Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 14
- 238000007493 shaping process Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 6
- 238000010923 batch production Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 238000009987 spinning Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
- F16C11/0614—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints the female part of the joint being open on two sides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/02—Preliminary treatment of metal stock without particular shaping, e.g. salvaging segregated zones, forging or pressing in the rough
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/04—Shaping in the rough solely by forging or pressing
-
- 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
- B21J5/008—Incremental forging
-
- 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
-
- 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
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
- F16C11/0685—Manufacture of ball-joints and parts thereof, e.g. assembly of ball-joints
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2220/00—Shaping
- F16C2220/40—Shaping by deformation without removing material
- F16C2220/46—Shaping by deformation without removing material by forging
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pivots And Pivotal Connections (AREA)
Abstract
The invention discloses a ball pin shell and a manufacturing method thereof. The steel pipe is manufactured by combining cold heading and stamping. The manufacturing and production of the ball pin shell are realized by using the process of combining cold heading and punch forming, and compared with the traditional manufacturing process, the manufacturing process has higher production efficiency and can meet the requirement of batch production. The invention relates to the technical field of machining.
Description
Technical Field
The invention relates to a ball pin shell and a manufacturing method thereof in the technical field of machining.
Background
The spherical connecting mechanism is a connecting mechanism capable of multi-angle linkage, and is commonly used in scenes needing flexible reversing, such as a steering mechanism of an automobile. The ball pin shell is used as a ball-shaped connecting mechanism, the middle of the ball pin shell is large, the two ends of the ball pin shell are small, and the ball pin shell plays a role in protecting a ball head placed in the ball pin shell and limiting a steering angle. But also has certain difficulty in the actual processing process because of the special shape.
The ball pin shell used in the automobile industry is manufactured by a process of repeatedly extruding by using an oil press and spinning by using a spinning machine, so that the ball pin shell achieves the shape of large middle and small two ends; then, bosses and grooves are machined on the inner wall. But the production efficiency is low, the production cost is high, and the requirement of batch production is difficult to meet.
Disclosure of Invention
The present invention is directed to at least one of the technical problems of the prior art, and provides a ball pin shell and a manufacturing method thereof, which can improve the production efficiency.
According to the embodiment of the first aspect of the present invention, a ball pin shell is provided, wherein the ball pin shell is tubular, a circular hole is arranged inside the ball pin shell, the inner diameter of two ends of the circular hole is smaller than the inner diameter of the middle part of the circular hole, a positioning groove is arranged at one end of the circular hole, and a positioning convex point is arranged on the inner wall of the circular hole.
According to an embodiment of the first aspect of the present invention, further, two ends of the circular hole smoothly transition to a middle portion of the circular hole.
According to the embodiment of the first aspect of the present invention, further, the number of the positioning grooves is four, and the four positioning grooves are equidistantly arranged around the axis of the circular hole and along the edge of one end of the circular hole.
According to the embodiment of the first aspect of the present invention, further, the number of the positioning protruding points is four, and the four positioning protruding points are equidistantly arranged around the axis of the circular hole and along the inner wall of the circular hole.
According to a second aspect of the present invention, there is provided a method for manufacturing a ball pin shell, including:
cutting the stock to obtain a blank;
shaping one end of the blank into a chamfer;
upsetting the blank;
shaping the other end of the blank into a chamfer;
punching a positioning hole at one end of the blank;
back-extruding the round hole along the positioning hole;
processing the positioning groove at one end of the round hole;
processing the positioning salient points on the inner wall of the round hole;
and stamping the blank to enable two ends of the round hole to contract inwards to obtain the ball pin shell.
According to an embodiment of the second aspect of the invention, further, the material is a cylindrical material.
According to an embodiment of the second aspect of the invention, the material is further straightened by means of a straightening wheel.
According to the embodiment of the second aspect of the present invention, after the blank is punched to shrink the two ends of the circular hole, the excess waste material inside the circular hole is removed.
According to the embodiment of the second aspect of the present invention, further, after the machining of the ball pin housing is completed, the ball pin housing is cleaned.
According to the embodiment of the second aspect of the invention, further, after the machining of the ball pin shell is completed, flaw detection inspection is performed on the ball pin shell.
The embodiment of the invention has the beneficial effects that: the manufacturing and production of the ball pin shell are realized by using the process of combining cold heading and punch forming, and compared with the traditional manufacturing process, the manufacturing process has higher production efficiency and can meet the requirement of batch production.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.
FIG. 1 is a schematic illustration of a ball pin housing after step S1 in an embodiment of a second aspect of the invention;
FIG. 2 is a schematic illustration of a ball pin housing after step S3 in an embodiment of a second aspect of the invention;
FIG. 3 is a schematic illustration of the ball pin housing after step S4 in an embodiment of the second aspect of the invention;
FIG. 4 is a schematic illustration of the ball pin housing after step S5 in an embodiment of the second aspect of the invention;
FIG. 5 is a schematic view of the ball pin housing after step S6 in an embodiment of the second aspect of the present invention;
FIG. 6 is a schematic illustration of the ball pin housing after step S8 in an embodiment of the second aspect of the invention;
FIG. 7 is a schematic illustration of the ball pin housing after step S9 in an embodiment of the second aspect of the invention;
FIG. 8 is a schematic illustration of a ball pin housing after scrap removal in accordance with a second embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 8, the ball pin housing in the first embodiment of the present invention has a tubular shape, and a circular hole 1 is formed inside the ball pin housing, and the circular hole 1 penetrates from one end of the ball pin housing to the other end of the ball pin housing and is a through hole. The internal diameter at the two ends of the round hole 1 is smaller than that of the middle part, and the outline of the internal space is drum-shaped and used for arranging the ball head therein and preventing the ball head from falling off. One end of the round hole 1 is provided with a positioning groove 2, so that a ball head can be clamped into the ball pin shell conveniently. The inside of round hole 1 is equipped with location bump 3 for with the bulb contact, change the face-to-face contact into point face contact, stability when increasing the bulb rotation.
Furthermore, two ends of the round hole 1 are in smooth transition with the middle, and interference of the convex step on the assembly of the ball head is prevented.
Further, the quantity of positioning groove 2 is four, and four positioning groove 2 set up around the axis of round hole 1 and along the marginal equidistance of round hole 1 one end to be convenient for along positioning groove card with the bulb in the ball pin shell.
Furthermore, the number of the positioning salient points 3 is four, and the four positioning salient points 3 are arranged around the axis of the round hole 1 and along the inner wall of the round hole 1 at equal intervals, so that the ball head is stressed more uniformly when in contact with the ball pin shell.
A method of manufacturing a ball stud shell in an embodiment of the second aspect of the present invention includes:
s1, referring to fig. 1, a material is cut to obtain a billet 4, and a square material or a cylindrical material is selected according to the outer shape of a ball pin housing. In this embodiment, a cylindrical material is used, and the ball pin housing is cylindrical.
And S2, shaping one end of the blank 4 to form a chamfer, preparing for subsequent cold heading, and avoiding the edge of the blank 4 from generating burrs or flashes caused by direct cold heading.
S3, with reference to FIG. 2, upsetting the billet 4 to obtain the desired outside diameter dimension.
And S4, referring to FIG. 3, shaping the other end of the blank 4 into a chamfer, and forming the outer contour of the ball pin shell.
S5, referring to FIG. 4, a positioning hole 5 is punched at one end of the blank 4 to prepare for subsequent reverse extrusion into a circular hole 1.
S6, referring to fig. 5, a round hole 1 is extruded along the positioning hole 5.
S7, processing a positioning groove 2 at one end of the round hole 1.
S8, referring to FIG. 6, a positioning salient point 3 is processed on the inner wall of the round hole 1.
S9, referring to FIG. 7, stamping the blank 4 to enable two ends of the round hole 1 to contract inwards to obtain the ball pin shell.
Furthermore, before the material is cut off, the material is straightened by a straightening wheel, so that the material is prevented from being bent to influence the processing precision of the subsequent process.
Further, referring to fig. 8, after the blank 4 is punched to shrink both ends of the circular hole 1, excess scraps inside the circular hole 1 are removed. Specifically, the waste material may be removed by lathing, scraping, or the like, or other processing methods that achieve the same effect may be used.
Further, after the ball pin shell is machined, the ball pin shell is cleaned, so that the ball pin shell can meet the cleanliness requirement.
Further, after the ball pin shell is processed, flaw detection is carried out on the ball pin shell, and whether cracks or other structural damages exist in the ball pin shell is detected.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.
Claims (10)
1. A ball pin shell, its characterized in that: the ball round pin shell is tubulose, and its inside is equipped with round hole (1), the internal diameter at round hole (1) both ends is less than the internal diameter at round hole (1) middle part, the one end of round hole (1) is equipped with positioning groove (2), the inner wall of round hole (1) is equipped with location bump (3).
2. The ball pin housing according to claim 1, wherein: the two ends of the round hole (1) are in smooth transition with the middle of the round hole (1).
3. The ball pin housing according to claim 1, wherein: the number of positioning grooves (2) is four, four the positioning grooves (2) wind the axis of the round hole (1) and are arranged along the equal distance of the edge of one end of the round hole (1).
4. The ball pin housing according to claim 1, wherein: the quantity of location bump (3) is four, four location bump (3) wind the axis of round hole (1) is followed the inner wall equidistance of round hole (1) sets up.
5. A method of manufacturing a ball pin shell, comprising:
cutting the material to obtain a blank (4);
shaping one end of the blank (4) into a chamfer;
upsetting the billet (4);
shaping the other end of the blank (4) into a chamfer;
punching a positioning hole (5) at one end of the blank (4);
extruding the round hole (1) along the positioning hole (5);
machining the positioning groove (2) at one end of the round hole (1);
processing the positioning salient point (3) on the inner wall of the round hole (1);
and stamping the blank (4) to enable two ends of the round hole (1) to contract inwards to obtain the ball pin shell.
6. The method of manufacturing a ball pin housing of claim 5, wherein: the material is a cylindrical material.
7. The method of manufacturing a ball pin housing of claim 5, wherein: the material is straightened by a straightening wheel.
8. The method of manufacturing a ball pin housing of claim 5, wherein: and (3) stamping the blank (4) so as to remove redundant waste materials in the round hole (1) after two ends of the round hole (1) are shrunk.
9. The method of manufacturing a ball pin housing of claim 5, wherein: and after the ball pin shell is processed, cleaning the ball pin shell.
10. The method of manufacturing a ball pin housing of claim 5, wherein: and after the ball pin shell is processed, carrying out flaw detection on the ball pin shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111617445.0A CN114427563A (en) | 2021-12-27 | 2021-12-27 | Ball pin shell and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111617445.0A CN114427563A (en) | 2021-12-27 | 2021-12-27 | Ball pin shell and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114427563A true CN114427563A (en) | 2022-05-03 |
Family
ID=81310983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111617445.0A Pending CN114427563A (en) | 2021-12-27 | 2021-12-27 | Ball pin shell and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114427563A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB838095A (en) * | 1955-04-20 | 1960-06-22 | Hans Von Cossel | Improvements relating to ball-and-socket joints |
| GB1233906A (en) * | 1968-01-27 | 1971-06-03 | ||
| JPH0890135A (en) * | 1994-09-14 | 1996-04-09 | Sumikin Seiatsuhin Kogyo Kk | Joint metal tool and manufacture of this half-made product |
| US20030074947A1 (en) * | 2001-01-09 | 2003-04-24 | Klaus Rosenberger | Method for producing a housing for a ball joint |
| US20040025446A1 (en) * | 2000-11-22 | 2004-02-12 | Yoshihiro Suzuki | Joint device and method of manufacturing housing of the device |
| CN101559468A (en) * | 2008-03-26 | 2009-10-21 | 国民机械有限责任公司 | Hose fitting |
| US20160229462A1 (en) * | 2015-02-05 | 2016-08-11 | Zf Friedrichshafen Ag | Method For Producing A Joint Connection Between A Joint Housing And A Connection Component And Suspension Component and Chassis Produced According To The Method |
| CN106080765A (en) * | 2016-08-18 | 2016-11-09 | 安徽江淮汽车股份有限公司 | A kind of non-maintaining drag-link joint |
| CN207297620U (en) * | 2017-08-11 | 2018-05-01 | 上海未来伙伴机器人有限公司 | Caster device |
| US20200392984A1 (en) * | 2019-06-13 | 2020-12-17 | Musashi Seimitsu Industry Co., Ltd. | Ball joint and method of manufacturing ball joint |
-
2021
- 2021-12-27 CN CN202111617445.0A patent/CN114427563A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB838095A (en) * | 1955-04-20 | 1960-06-22 | Hans Von Cossel | Improvements relating to ball-and-socket joints |
| GB1233906A (en) * | 1968-01-27 | 1971-06-03 | ||
| JPH0890135A (en) * | 1994-09-14 | 1996-04-09 | Sumikin Seiatsuhin Kogyo Kk | Joint metal tool and manufacture of this half-made product |
| US20040025446A1 (en) * | 2000-11-22 | 2004-02-12 | Yoshihiro Suzuki | Joint device and method of manufacturing housing of the device |
| US20030074947A1 (en) * | 2001-01-09 | 2003-04-24 | Klaus Rosenberger | Method for producing a housing for a ball joint |
| CN101559468A (en) * | 2008-03-26 | 2009-10-21 | 国民机械有限责任公司 | Hose fitting |
| US20160229462A1 (en) * | 2015-02-05 | 2016-08-11 | Zf Friedrichshafen Ag | Method For Producing A Joint Connection Between A Joint Housing And A Connection Component And Suspension Component and Chassis Produced According To The Method |
| CN106080765A (en) * | 2016-08-18 | 2016-11-09 | 安徽江淮汽车股份有限公司 | A kind of non-maintaining drag-link joint |
| CN207297620U (en) * | 2017-08-11 | 2018-05-01 | 上海未来伙伴机器人有限公司 | Caster device |
| US20200392984A1 (en) * | 2019-06-13 | 2020-12-17 | Musashi Seimitsu Industry Co., Ltd. | Ball joint and method of manufacturing ball joint |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2007130673A (en) | Manufacturing method of outer and inner ring of bearing race using in bearing steel pipe | |
| CN114427563A (en) | Ball pin shell and manufacturing method thereof | |
| CN111085640B (en) | Cold heading production process of combined nut blank | |
| JPS61115625A (en) | Production of double layer bearing with flange | |
| CN215508811U (en) | Cold-heading mould is used in eccentric shaft production | |
| CN114406166B (en) | Square rod with round flange and manufacturing method thereof | |
| CN112296233A (en) | Machining method of automobile shock absorption pipe | |
| CN114406167A (en) | Flange part with concave points on end face and manufacturing method thereof | |
| RU2185916C2 (en) | Method for making flanged sleeve | |
| CN211990760U (en) | Upsetting punch and upsetting equipment | |
| JP3513818B2 (en) | Manufacturing method of nut with washer | |
| CN220646435U (en) | Oblique tooth round nut and forming device thereof | |
| US3142115A (en) | Method and apparatus for manufacturing annular workpieces of metal, particularly steel, to be subsequently shaped by cold forging | |
| JPH0635021B2 (en) | Burring method | |
| JPH0890129A (en) | Manufacture of inner ring and outer ring for rolling bearing | |
| JPS60166108A (en) | Manufacture of metallic tube with shaped inner face | |
| CN114393378B (en) | Production method of collecting pipe of carbon dioxide gas cooler | |
| CN219253838U (en) | Ten-hole side punching stamping die | |
| JPH0356131B2 (en) | ||
| CN210398362U (en) | Composite metal wire | |
| JP3963091B2 (en) | FORGING METHOD FOR SHAFT CUP MEMBER AND SHAFT CUP MEMBER | |
| JPH05337576A (en) | Forming method of tube end | |
| CN114406069A (en) | Pin rod and manufacturing method thereof | |
| JPS6219932B2 (en) | ||
| JPH0679394A (en) | Manufacture of sleeve with expanding slot |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220503 |