CN112743020B - Method for processing elongated hole part by using cold heading process - Google Patents
Method for processing elongated hole part by using cold heading process Download PDFInfo
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- CN112743020B CN112743020B CN202011427257.7A CN202011427257A CN112743020B CN 112743020 B CN112743020 B CN 112743020B CN 202011427257 A CN202011427257 A CN 202011427257A CN 112743020 B CN112743020 B CN 112743020B
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- die
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- shaping
- cold heading
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- 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
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- 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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- 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
- B21J13/08—Accessories for handling work or tools
- B21J13/10—Manipulators
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- 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
- B21J13/08—Accessories for handling work or tools
- B21J13/14—Ejecting devices
-
- 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
- B21J5/002—Hybrid process, e.g. forging following casting
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- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention relates to a method for processing an elongated hole part by using a cold heading process, which comprises the following steps: A. the process stations are set as seven stations which are respectively as follows: a. a cutting station; b. a first shaping station; c. a second shaping station; d. punching a large hole station; e. a hole-shrinking station; f. a third shaping station; g. a waste material discharging station is communicated; B. manufacturing a mold: the die comprises a main die (2), a die shell (3) and a male die stamping rod (1), wherein the die shell (3) is sleeved outside the main die (2), an inner die (7) is arranged below the main die (2), the inner die (7) is in threaded connection with the die shell (3), a core rod (6) is arranged at the central axis positions of the main die (2) and the inner die (7) through a sleeve (5), a thimble (4) is arranged at the position of the bottom of the die, which is deviated from the axis of the core rod, C, a material is fed into the die for forming, D, a cold header is used for stamping once to complete a stamping cycle, and E, after the stamping cycle, raw materials are cut off, shaped and punched in the die to obtain qualified parts.
Description
Technical Field
The invention belongs to the field of part machining, belongs to a forging part machining process with low material removal, and particularly relates to a method for machining an elongated hole part by using a cold heading process.
Background art:
the traditional forming method of the prior slender hole part comprises the steps of firstly turning or cold heading a blank; and (3) processing a positioning hole by using a center drill, and then drilling by using a drill bit to obtain a slender small hole by the process method. The process has the advantages of low material utilization rate, low processing efficiency and high labor intensity, can complete the forming of the part hole by multiple processing devices and multiple procedures, and has the problem that a drill bit is easy to break in the drilling process.
Disclosure of Invention
The invention aims to provide a method for processing an elongated hole part by using a cold heading process, which improves the utilization rate of materials and reduces the cost by processing the elongated hole part by using the cold heading processing method; the forming method is changed, only the cold heading process is used for direct forming, the independent drilling process is reduced, the production cost is further reduced, and meanwhile, the production cycle of parts is shortened.
The invention is realized by the following technical scheme:
a method for processing slender hole parts by using a cold heading process is characterized in that a wire rod coil stock is matched with a new cold heading process for processing and production, and a wire rod enters a die through a correcting wheel to be cut, deformed and punched, and specifically comprises the following steps:
A. the process stations are seven, and are respectively: a. a cutting station; b. a first shaping station; c. a second shaping station; d. punching a large hole station; e. a hole shrinking station; f. a third shaping station; g. a waste material discharging station is communicated;
B. manufacturing a mold: the mould comprises a main mould, a mould shell and a convex mould punching rod, wherein the mould shell is sleeved outside the main mould, an inner mould is arranged under the main mould, the inner mould is in threaded connection with the mould shell, a core rod is arranged at the central axis positions of the main mould and the inner mould through a sleeve, and a thimble is arranged at the bottom of the mould and deviates from the axis position of the core rod; wherein, the punch rod of the male die plays roles of shaping, pre-punching, waste material unloading and the like; the main die plays a role in fixing the part and forming the appearance of the part; the core rod plays a role in punching and supporting the size of an inner hole; the sleeve plays a role in pushing out the part; the mould shell plays a role in fixing the motion trail of the movable mould; the thimble plays a role of transferring force when pushing out the part;
C. feeding the material into a mould for forming;
D. the cold header performs stamping once to complete a stamping cycle;
E. after the punching circulation, the raw materials are cut, shaped and punched in a die to obtain qualified parts; one cycle results in one part.
The steps C-E are specifically as follows: 1) Feeding the material into a shearing die for cutting; 2) The mechanical clamp is sent into a station die, and a punch rod of the male die is pushed into the die for shaping; 3) The mechanical clamp turnover part enters a two-station die and is pushed into the die again by a punch pin for shaping and pre-punching; 4) The mechanical clamp is sent to three stations, and a hole slightly larger than the target size is punched by the male die; 5) Four-station hole shrinkage and shaping; 6) Obtaining the appearance of the part at five stations, and controlling the thickness of the waste material to be about 1mm; 7) And discharging the waste to obtain qualified parts.
And the station b and the station c are clamped and reversed by a manipulator.
And the station d and the station e are clamped and reversed by a manipulator.
And a return spring is arranged between the main die and the inner die at the station g.
And the space between the station d and the station e is reduced to a target size hole through a die from a hole larger than the target size hole.
The stations e and f are supported by the mandrel.
According to the invention, the cold heading processing method is adopted to process the elongated hole part, so that the utilization rate of materials is improved, and the cost is reduced; the forming method is changed, only the cold heading process is used for direct forming, the independent drilling process is reduced, the production cost is further reduced, and meanwhile, the production cycle of parts is shortened.
Drawings
Figure 1 is a schematic view of a part station,
figure 2 is a schematic view of the mold structure,
fig. 3 is a schematic view of a mold process.
The labels in the figure are: 1. the device comprises a male die stamping rod 2, a main die 3, a die shell 4, a thimble 5, a sleeve 6, a core rod 7 and an inner die.
a. A cutting station; b. a first shaping station; c. a second shaping station; d. punching a large hole station; e. a hole-shrinking station; f. a third shaping station; g. and (6) leading out of the waste material station.
Detailed Description
The following detailed description of embodiments, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
As shown in fig. 1-3, a method for processing an elongated hole part by a cold heading process, which adopts a wire coil stock to be matched with a new cold heading process for processing and production, wherein a wire enters a die through a correcting wheel to be cut, deformed and punched, and specifically comprises the following steps:
A. the process stations are seven, and are respectively: a. a cutting station; b. a first shaping station; c. a second shaping station; d. punching a large hole station; e. a hole-shrinking station; f. a third shaping station; g. a waste material discharging station is communicated;
B. manufacturing a mold: the die comprises a main die 2, a die shell 3 and a male die stamping rod 1, wherein the die shell 3 is sleeved outside the main die 2, an inner die 7 is arranged below the main die 2, the inner die 7 is in threaded connection with the die shell 3, a core rod 6 is arranged at the central axis position of the main die 2 and the inner die 7 through a sleeve 5, and a thimble 4 is arranged at the bottom of the die and deviates from the axis position of the core rod; wherein, the punch rod of the male die plays roles of shaping, pre-punching, waste material unloading and the like; the main die plays a role in fixing the part and forming the appearance of the part; the core rod plays a role in punching and supporting the size of an inner hole; the sleeve plays a role in pushing out the part; the mould shell plays a role in fixing the motion trail of the movable mould; the thimble plays a role of transferring force when pushing out the part;
C. feeding the material into a mould for forming;
D. the cold header performs stamping once to complete a stamping cycle;
E. after the punching circulation, the raw materials are cut, shaped and punched in a die to obtain qualified parts; one cycle results in one part.
The steps C-E are specifically as follows: 1) Feeding the material into a shearing die for cutting; 2) The mechanical clamp is sent into a station die, and a punch rod of the male die is pushed into the die for shaping; 3) The mechanical clamp turnover part enters a two-station die and is pushed into the die by a punch rod of the male die again for shaping and pre-punching; 4) The mechanical clamp is conveyed to three stations, and a hole larger than the target size is punched by the male die; 5) Four-station hole shrinkage and shaping; 6) Obtaining the appearance of the part at five stations, and controlling the thickness of the waste material to be about 1mm; 7) And discharging the waste to obtain qualified parts.
And the station b and the station c are clamped and reversed by a manipulator.
And the station d and the station e are clamped and reversed by a manipulator.
And in the station g, a spring with a reset function is arranged between the main die and the inner die.
And the space between the station d and the station e is reduced to a target size hole through a die from a hole larger than the target size hole.
The stations e and f are supported by the mandrel to guarantee the dimensions.
Compared with the traditional process, the invention has the following advantages:
(1) The material utilization rate of the new process is high and can be improved to more than 98%.
(2) Appearance forming and punching are carried out simultaneously, and the same type of parts can reduce the processes and save labor and equipment cost.
(3) The efficiency is improved, and the traditional process for producing the elongated hole part needs about 120 seconds per part; the new process forms the elongated orifice approximately 1 second per piece.
(4) Compared with the traditional method, the machining method is changed, so that the problem that the drill bit is easy to break when the elongated hole is drilled is solved.
(5) Punching by adopting a new process, namely punching a large hole firstly and then obtaining a small hole through hole shrinkage (see a three-station to a four-station in a detailed view in figure 1). Through practice, 50000 left and right parts can be processed by one punch rod.
The above description is only an example of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the patent disclosure should be covered within the protection scope of the present invention, and therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
The non-illustrated parts referred to in the present invention are the same as or implemented by the prior art.
Claims (6)
1. A method for processing elongated hole parts by using a cold heading process is characterized in that: the method is characterized in that a wire rod coil stock is matched with a new cold heading process for processing and production, the wire rod enters a die through a correcting wheel for cutting, deforming and punching, and the method specifically comprises the following steps:
A. the process stations are set as seven stations which are respectively as follows: a. a cutting station; b. a first shaping station; c. a second shaping station; d. punching a large hole station; e. a hole-shrinking station; f. a third shaping station; g. a waste material discharging station is communicated;
B. manufacturing a mold: the die comprises a main die (2), a die shell (3) and a male die stamping rod (1), wherein the die shell (3) is sleeved outside the main die (2), an inner die (7) is arranged below the main die (2), the inner die (7) is in threaded connection with the die shell (3), a core rod (6) is arranged at the central axis positions of the main die (2) and the inner die (7) through a sleeve (5), and a thimble (4) is arranged at the position of the bottom of the die, which deviates from the axis of the core rod;
C. feeding the material into a mould for forming;
D. the cold header performs stamping once to complete a stamping cycle;
E. after the punching circulation, the raw materials are cut off, shaped and punched in the die to obtain qualified parts; obtaining a part after one cycle;
the steps C-E are specifically as follows: 1) Feeding the material into a shearing die for cutting; 2) The mechanical clamp is sent into a station die, and a punch rod of the male die is pushed into the die for shaping; 3) The mechanical clamp turnover part enters a two-station die and is pushed into the die again by a punch pin for shaping and pre-punching; 4) The mechanical clamp is conveyed to three stations, and a hole larger than the target size is punched by the male die; 5) Four-station hole shrinkage and shaping; 6) Obtaining the appearance of the part at five stations, and controlling the thickness of the waste material to be 1mm; 7) And discharging the waste to obtain qualified parts.
2. The method of claim 1, wherein the elongated hole part is machined by a cold heading process, and the method comprises the following steps: and the station b and the station c are clamped and reversed by a manipulator.
3. The method for processing the elongated hole part by the cold heading process as claimed in claim 1, wherein: and the station d and the station e are clamped and reversed by a manipulator.
4. The method of claim 1, wherein the elongated hole part is machined by a cold heading process, and the method comprises the following steps: and a return spring is arranged between the main die and the inner die at the station g.
5. The method of claim 1, wherein the elongated hole part is machined by a cold heading process, and the method comprises the following steps: and the space between the station d and the station e is reduced to a target size hole through a die from a hole larger than the target size hole.
6. The method for processing the elongated hole part by the cold heading process as claimed in claim 1, wherein: the stations e and f are supported by mandrels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011427257.7A CN112743020B (en) | 2020-12-09 | 2020-12-09 | Method for processing elongated hole part by using cold heading process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011427257.7A CN112743020B (en) | 2020-12-09 | 2020-12-09 | Method for processing elongated hole part by using cold heading process |
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| Publication Number | Publication Date |
|---|---|
| CN112743020A CN112743020A (en) | 2021-05-04 |
| CN112743020B true CN112743020B (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011427257.7A Active CN112743020B (en) | 2020-12-09 | 2020-12-09 | Method for processing elongated hole part by using cold heading process |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1153436A (en) * | 1955-01-14 | 1958-03-10 | Waterbury Farrel Foundry Co | Method and machine for making nut blanks |
| JPH0569078A (en) * | 1991-09-11 | 1993-03-23 | Honda Motor Co Ltd | Method for forming inner ring of constant velocity joint |
| EP0870559A2 (en) * | 1997-04-08 | 1998-10-14 | CHIAVETTE UNIFICATE S.p.A. | Apparatus for producing a spherical element for the head of a ball joint |
| CN106670367A (en) * | 2017-02-21 | 2017-05-17 | 苏州孚莱博精密金属科技有限公司 | Cold heading die set for manufacturing oil pipe joint and cold heading process |
| CN107931497A (en) * | 2017-11-27 | 2018-04-20 | 上海鸿基金属制品有限公司 | Combine the cold-heading molding technique of fixed link |
| CN109434005A (en) * | 2018-08-16 | 2019-03-08 | 江苏天毅冷镦股份有限公司 | A kind of cold upsetting production technique of external screw thread vehicle brake pipe joint |
| CN109551180A (en) * | 2018-11-29 | 2019-04-02 | 上海鸿基金属制品有限公司 | A kind of processing technology of threaded long casing |
-
2020
- 2020-12-09 CN CN202011427257.7A patent/CN112743020B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1153436A (en) * | 1955-01-14 | 1958-03-10 | Waterbury Farrel Foundry Co | Method and machine for making nut blanks |
| JPH0569078A (en) * | 1991-09-11 | 1993-03-23 | Honda Motor Co Ltd | Method for forming inner ring of constant velocity joint |
| EP0870559A2 (en) * | 1997-04-08 | 1998-10-14 | CHIAVETTE UNIFICATE S.p.A. | Apparatus for producing a spherical element for the head of a ball joint |
| CN106670367A (en) * | 2017-02-21 | 2017-05-17 | 苏州孚莱博精密金属科技有限公司 | Cold heading die set for manufacturing oil pipe joint and cold heading process |
| CN107931497A (en) * | 2017-11-27 | 2018-04-20 | 上海鸿基金属制品有限公司 | Combine the cold-heading molding technique of fixed link |
| CN109434005A (en) * | 2018-08-16 | 2019-03-08 | 江苏天毅冷镦股份有限公司 | A kind of cold upsetting production technique of external screw thread vehicle brake pipe joint |
| CN109551180A (en) * | 2018-11-29 | 2019-04-02 | 上海鸿基金属制品有限公司 | A kind of processing technology of threaded long casing |
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| Publication number | Publication date |
|---|---|
| CN112743020A (en) | 2021-05-04 |
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