CN117123710A - A ring-shaped earring forging mold and its forging process - Google Patents
A ring-shaped earring forging mold and its forging process Download PDFInfo
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- CN117123710A CN117123710A CN202311135121.2A CN202311135121A CN117123710A CN 117123710 A CN117123710 A CN 117123710A CN 202311135121 A CN202311135121 A CN 202311135121A CN 117123710 A CN117123710 A CN 117123710A
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- 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
- 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
- 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
- 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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- Mechanical Engineering (AREA)
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Abstract
本发明涉及一种环形耳金具锻造成型模具及其锻造工艺，其特征在于：包括上锻造模和下锻造模；具体工艺为：S1：圆棒烧料；S2：空气锤锻打制坯；S3：初锻成型；S4：粗冲孔；S5：精锻成型；S6：切边；S7：精冲孔；环形耳金具的锻造中采用双工位的方式进行锻造，锻造的时候先粗锻成型，然后再进行精锻成型；粗锻时环体型腔为椭圆，精锻时环体型腔为圆形，同时，将第二腰型岛中间铣成凹型，确保精锻时环体飞边多余的料可以流向凹槽，避免流料包折，从而解决环体的裂纹现象；虽然增加了锻造的工序，但是极大的提高了产品的合格率，降低了残次率。
The invention relates to a ring-shaped ear fitting forging mold and its forging process, which is characterized by: including an upper forging die and a lower forging die; the specific process is: S1: round bar sintering; S2: air hammer forging to make blank; S3 : Preliminary forging; S4: Rough punching; S5: Precision forging; S6: Trimming; S7: Precision punching; Ring ear fittings are forged using a double-station method, and rough forging is done first. , and then precision forging is performed; the ring body cavity is elliptical during rough forging, and circular during fine forging. At the same time, the middle of the second waist-shaped island is milled into a concave shape to ensure that there is no excess flash on the ring body during fine forging. The material can flow to the groove to avoid folding of the flowing material, thereby solving the crack phenomenon of the ring body; although the forging process is increased, the qualification rate of the product is greatly improved and the defective rate is reduced.
Description
Technical Field
The invention relates to the technical field of annular ear hardware forging, in particular to an annular ear hardware forging forming die and a forging process thereof.
Background
The traditional forging mode of the annular ear hardware fitting adopts half forging and single-station die forging; the process route is as follows: round bar firing, air hammer forging, forging forming, trimming and punching; in the mode of single-station forging forming, the annular ear fitting is easy to generate a folding phenomenon, so that the ring body part is cracked.
Disclosure of Invention
The invention aims to solve the technical problem of providing a forging forming die for annular ear hardware and a forging process thereof, which can solve the problem that the annular body part is cracked due to the fact that the annular ear hardware is easy to be folded by forging by a traditional single-station die.
In order to solve the technical problems, the technical scheme of the invention is as follows: the annular ear hardware fitting forging forming die comprises a connecting column body and an annular ear; the connecting column body is arranged at one end of the annular lug; the innovation point is that: comprises an upper forging die and a lower forging die; the upper forging die and the lower forging die are matched in the vertical direction, a transverse parting surface is formed by the upper forging die and the lower forging die, and the upper forging die and the lower forging die are arranged in a mirror image mode relative to the parting surface;
the surfaces of the upper forging die and the lower forging die at the die closing positions are respectively provided with a pair of half forming cavities for accommodating forging blanks, and the four half forming cavities correspond to the synthetic dies in pairs at the die closing positions;
the forging cavity comprises a first forging cavity and a second forging cavity; the first forging cavity and the second forging cavity are respectively provided with a connecting cylinder forging cavity; the first forging cavity is internally provided with a first waist-shaped island, the parting surface of the first waist-shaped island is of a plane structure, a first annular lug forging cavity is formed between the outer contour of the first waist-shaped island and the inner wall of the first forging cavity, and the first annular lug forging cavity is integrally communicated with the connecting cylinder forging cavity; the section of the first annular lug forging cavity perpendicular to the parting surface is of an oval structure;
a second waist-shaped island is arranged in the second forging cavity, a groove is formed at the parting surface of the second waist-shaped island, a second annular lug forging cavity is formed between the outer contour of the second waist-shaped island and the inner wall of the second forging cavity, and the second annular lug forging cavity is integrally communicated with the connecting cylinder forging cavity; the section perpendicular to the parting surface of the second annular lug forging cavity is of a circular structure.
Further, the cross-sectional width of the first annular lug forging cavity is smaller than that of the second annular lug forging cavity; the depth of the first annular lug forging cavity is greater than the section degree of the second annular lug forging cavity.
Further, the groove at the parting surface of the second waist-shaped island is a first waist-shaped surface at the parting surface, the bottom end of the groove is a second waist-shaped surface, and a slope surface is connected between the edge of the first waist-shaped surface and the edge of the second waist-shaped surface.
The forging forming process of the annular ear hardware fitting has the innovation points that: the specific forging forming process comprises the following steps:
s1: firing round bars: putting the cylindrical rod material into a heating furnace, wherein the heating temperature is set at 1000+/-50 ℃ and the heating time is set at 15-30s;
s2: air hammer forging blank making: placing the post rod material subjected to material firing into a batch die, and forging the post rod body into a blank shape by controlling hammer forging;
s3: and (5) performing preliminary forging forming: placing the annular ear hardware blank into a first forging cavity between an upper forging die and a lower forging die; the upper forging die starts to descend and is matched with the lower forging die, after the die is matched, the pressure of the upper forging die is 5000KN, the forging temperature is 950-1050 ℃, and the initial forging forming of the annular ear fitting is completed;
s4: coarse punching: taking out the annular ear fitting subjected to preliminary forging forming, putting the annular ear fitting into a punching die, and removing formed rim charge of the annular ear fitting in the first waist-shaped island parting surface area in a punching mode;
s5: and (5) precision forging and forming: the annular earring fitting after the rough punching process is put into a second forging cavity; the upper forging die starts to descend and is matched with the lower forging die, after the die is matched, the pressure of the upper forging die is 5000KN, the forging temperature is 950-1050 ℃, and finish the finish forging forming of the annular ear hardware fitting;
s6: trimming: after finish forging forming of the annular ear fitting, taking out the annular ear fitting from the second forging cavity, putting the annular ear fitting into a trimming machine, and trimming the annular ear fitting after finish forging forming;
s7: fine punching: after trimming of the annular ear fitting is completed, placing the trimmed annular ear fitting into a punching die, cutting off the formed rim charge of the annular ear fitting in the second waist-shaped island parting surface area in a punching mode, and realizing fine punching of the annular ear fitting.
Further, the step S7: after finishing the finish punching, carrying out a heat treatment process, a surface cleaning process and a flaw detection process on the product; wherein the heat treatment procedure is normalizing treatment; the surface treatment is to put the forge piece into a shot blasting machine for deburring; the flaw detection is eddy current flaw detection.
Further, the heat treatment process specifically includes: normalizing: the annular eared hardware fitting is put into an electric furnace to be heated to 880+/-10 ℃, and the temperature is kept for 6 to 9 hours; air cooling: taking out the annular ear fitting subjected to the normalizing heat treatment from the furnace, and cooling the annular ear fitting by air until the surface temperature of the annular ear fitting is reduced to 600-650 ℃; and (3) heat preservation treatment: the annular ear hardware fitting is sent into an electric furnace and the furnace door is closed, so that the core temperature of the annular ear hardware fitting is continuously dispersed outwards, the annular ear hardware fitting keeps warm by utilizing the waste heat of the annular ear hardware fitting, and the temperature in the furnace is increased; when the temperature in the furnace is higher than 700 ℃, repeating the air cooling step; and when the final temperature in the furnace is 675-690 ℃, executing a furnace-following cooling zone, and naturally cooling the annular ear hardware fitting in the furnace along with the furnace.
The invention has the advantages that:
1) In the invention, the annular ear hardware is forged in a double-station mode, and during forging, the annular ear hardware is firstly subjected to rough forging and then is subjected to finish forging and forming; the die cavity of the ring body is elliptical during rough forging, the die cavity of the ring body is circular during finish forging, and meanwhile, the middle of the second waist-shaped island is milled into a concave shape, so that redundant material on the flash of the ring body can flow to the groove during finish forging, the phenomenon of material flowing package is avoided, and the crack phenomenon of the ring body is solved; though the forging process is increased, the qualification rate of the product is greatly improved, and the defective rate is reduced.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is a diagram of a conventional single-station annular ear fitting forging die structure.
Fig. 2 is a perspective view of a lower forging die of the annular ear fitting forging forming die of the invention.
Fig. 3 is a plan view of a lower forging die of the annular ear fitting forging forming die of the present invention.
Fig. 4 is a cross-sectional view of a lower forging die of the annular ear fitting forging forming die of the present invention.
Fig. 5 is a flow chart of a forging process of annular ear hardware.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The annular ear fitting forging forming die is shown in fig. 2 to 4, and the annular ear fitting comprises a connecting column body and an annular ear; the connecting column body is arranged at one end of the annular lug; comprises an upper forging die and a lower forging die 1; the upper forging die and the lower forging die 1 are matched in the vertical direction, the upper forging die and the lower forging die 1 form a transverse parting surface, and the upper forging die and the lower forging die 1 are arranged in a mirror image mode relative to the parting surface.
The surfaces of the upper forging die and the lower forging die 1 at the die clamping positions are respectively provided with a pair of half forming cavities for accommodating forging blanks, and the four half forming cavities correspond to the forming dies in pairs at the die clamping positions.
The forging cavity comprises a first forging cavity 2 and a second forging cavity 3; the first forging cavity 2 and the second forging cavity 3 are respectively provided with a connecting column forging cavity 4; a first waist-shaped island 21 is arranged in the first forging cavity 2, the parting surface of the first waist-shaped island 21 is of a plane structure, a first annular lug forging cavity 22 is formed between the outer contour of the first waist-shaped island 21 and the inner wall of the first forging cavity 2, and the first annular lug forging cavity 22 is integrally communicated with the connecting cylinder forging cavity 4; the first annular ear forging cavity 22 has an oval-shaped cross section perpendicular to the parting plane.
A second waist-shaped island 31 is arranged in the second forging cavity 3, a groove 33 is arranged at the parting surface of the second waist-shaped island 31, a second annular lug forging cavity 32 is formed between the outer contour of the second waist-shaped island 31 and the inner wall of the second forging cavity 3, and the second annular lug forging cavity 32 is integrally communicated with the connecting cylinder forging cavity 4; the cross section of the second annular ear forging cavity 32 perpendicular to the parting plane is circular in configuration.
The cross-sectional width of the first annular ear forging cavity 22 is less than the cross-sectional width of the second annular ear forging cavity 32; the depth of the first annular ear forging cavity 22 is greater than the cross-sectional extent of the second annular ear forging cavity 32.
The groove at the parting surface of the second waist-shaped island 31 is a first waist-shaped surface at the parting surface, the bottom end of the groove is a second waist-shaped surface, and a slope surface is connected between the edge of the first waist-shaped surface and the edge of the second waist-shaped surface.
As shown in fig. 5: a forging forming process of annular ear hardware fitting comprises the following steps:
s1: firing round bars: putting the cylindrical rod material into a heating furnace, wherein the heating temperature is set at 1000+/-50 ℃ and the heating time is set at 15-30s;
s2: air hammer forging blank making: placing the post rod material subjected to material firing into a batch die, and forging the post rod body into a blank shape by controlling hammer forging;
s3: and (5) performing preliminary forging forming: placing the annular ear hardware blank into a first forging cavity between an upper forging die and a lower forging die; the upper forging die starts to descend and is matched with the lower forging die, after the die is matched, the pressure of the upper forging die is 5000KN, the forging temperature is 950-1050 ℃, and the initial forging forming of the annular ear fitting is completed;
s4: coarse punching: taking out the annular ear fitting subjected to preliminary forging forming, putting the annular ear fitting into a punching die, and removing formed rim charge of the annular ear fitting in the first waist-shaped island parting surface area in a punching mode;
s5: and (5) precision forging and forming: the annular earring fitting after the rough punching process is put into a second forging cavity; the upper forging die starts to descend and is matched with the lower forging die, after the die is matched, the pressure of the upper forging die is 5000KN, the forging temperature is 950-1050 ℃, and finish the finish forging forming of the annular ear hardware fitting;
s6: trimming: after finish forging forming of the annular ear fitting, taking out the annular ear fitting from the second forging cavity, putting the annular ear fitting into a trimming machine, and trimming the annular ear fitting after finish forging forming;
s7: fine punching: after trimming of the annular ear fitting is completed, placing the trimmed annular ear fitting into a punching die, cutting off the formed rim charge of the annular ear fitting in the second waist-shaped island parting surface area in a punching mode, and realizing fine punching of the annular ear fitting.
S7: after finishing the finish punching, carrying out a heat treatment process, a surface cleaning process and a flaw detection process on the product; wherein the heat treatment procedure is normalizing treatment; the surface treatment is to put the forge piece into a shot blasting machine for deburring; the flaw detection is eddy current flaw detection.
The heat treatment process comprises the following steps: normalizing: the annular eared hardware fitting is put into an electric furnace to be heated to 880+/-10 ℃, and the temperature is kept for 6 to 9 hours; air cooling: taking out the annular ear fitting subjected to the normalizing heat treatment from the furnace, and cooling the annular ear fitting by air until the surface temperature of the annular ear fitting is reduced to 600-650 ℃; and (3) heat preservation treatment: the annular ear hardware fitting is sent into an electric furnace and the furnace door is closed, so that the core temperature of the annular ear hardware fitting is continuously dispersed outwards, the annular ear hardware fitting keeps warm by utilizing the waste heat of the annular ear hardware fitting, and the temperature in the furnace is increased; when the temperature in the furnace is higher than 700 ℃, repeating the air cooling step; and when the final temperature in the furnace is 675-690 ℃, executing a furnace-following cooling zone, and naturally cooling the annular ear hardware fitting in the furnace along with the furnace.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The annular ear hardware fitting forging forming die comprises a connecting column body and an annular ear; the connecting column body is arranged at one end of the annular lug; the method is characterized in that: comprises an upper forging die and a lower forging die; the upper forging die and the lower forging die are matched in the vertical direction, a transverse parting surface is formed by the upper forging die and the lower forging die, and the upper forging die and the lower forging die are arranged in a mirror image mode relative to the parting surface;
the surfaces of the upper forging die and the lower forging die at the die closing positions are respectively provided with a pair of half forming cavities for accommodating forging blanks, and the four half forming cavities correspond to the synthetic dies in pairs at the die closing positions;
the forging cavity comprises a first forging cavity and a second forging cavity; the first forging cavity and the second forging cavity are respectively provided with a connecting cylinder forging cavity; the first forging cavity is internally provided with a first waist-shaped island, the parting surface of the first waist-shaped island is of a plane structure, a first annular lug forging cavity is formed between the outer contour of the first waist-shaped island and the inner wall of the first forging cavity, and the first annular lug forging cavity is integrally communicated with the connecting cylinder forging cavity; the section of the first annular lug forging cavity perpendicular to the parting surface is of an oval structure;
a second waist-shaped island is arranged in the second forging cavity, a groove is formed at the parting surface of the second waist-shaped island, a second annular lug forging cavity is formed between the outer contour of the second waist-shaped island and the inner wall of the second forging cavity, and the second annular lug forging cavity is integrally communicated with the connecting cylinder forging cavity; the section perpendicular to the parting surface of the second annular lug forging cavity is of a circular structure.
2. The annular ear fitting forging forming die according to claim 1, wherein: the cross-sectional width of the first annular lug forging cavity is smaller than that of the second annular lug forging cavity; the depth of the first annular lug forging cavity is greater than the section degree of the second annular lug forging cavity.
3. The annular ear fitting forging forming die according to claim 1, wherein: the groove at the parting surface of the second waist-shaped island is a first waist-shaped surface at the parting surface, the bottom end of the groove is a second waist-shaped surface, and a slope surface is connected between the edge of the first waist-shaped surface and the edge of the second waist-shaped surface.
4. A forging forming process of annular ear hardware is characterized in that: the specific forging forming process comprises the following steps:
s1: firing round bars: putting the cylindrical rod material into a heating furnace, wherein the heating temperature is set at 1000+/-50 ℃ and the heating time is set at 15-30s;
s2: air hammer forging blank making: placing the post rod material subjected to material firing into a batch die, and forging the post rod body into a blank shape by controlling hammer forging;
s3: and (5) performing preliminary forging forming: placing the annular ear hardware blank into a first forging cavity between an upper forging die and a lower forging die; the upper forging die starts to descend and is matched with the lower forging die, after the die is matched, the pressure of the upper forging die is 5000KN, the forging temperature is 950-1050 ℃, and the initial forging forming of the annular ear fitting is completed;
s4: coarse punching: taking out the annular ear fitting subjected to preliminary forging forming, putting the annular ear fitting into a punching die, and removing formed rim charge of the annular ear fitting in the first waist-shaped island parting surface area in a punching mode;
s5: and (5) precision forging and forming: the annular earring fitting after the rough punching process is put into a second forging cavity; the upper forging die starts to descend and is matched with the lower forging die, after the die is matched, the pressure of the upper forging die is 5000KN, the forging temperature is 950-1050 ℃, and finish the finish forging forming of the annular ear hardware fitting;
s6: trimming: after finish forging forming of the annular ear fitting, taking out the annular ear fitting from the second forging cavity, putting the annular ear fitting into a trimming machine, and trimming the annular ear fitting after finish forging forming;
s7: fine punching: after trimming of the annular ear fitting is completed, placing the trimmed annular ear fitting into a punching die, cutting off the formed rim charge of the annular ear fitting in the second waist-shaped island parting surface area in a punching mode, and realizing fine punching of the annular ear fitting.
5. The annular ear fitting forging forming process according to claim 4, wherein: the S7: after finishing the finish punching, carrying out a heat treatment process, a surface cleaning process and a flaw detection process on the product; wherein the heat treatment procedure is normalizing treatment; the surface treatment is to put the forge piece into a shot blasting machine for deburring; the flaw detection is eddy current flaw detection.
6. The annular ear fitting forging forming process according to claim 5, wherein: the heat treatment process comprises the following steps: normalizing: the annular eared hardware fitting is put into an electric furnace to be heated to 880+/-10 ℃, and the temperature is kept for 6 to 9 hours; air cooling: taking out the annular ear fitting subjected to the normalizing heat treatment from the furnace, and cooling the annular ear fitting by air until the surface temperature of the annular ear fitting is reduced to 600-650 ℃; and (3) heat preservation treatment: the annular ear hardware fitting is sent into an electric furnace and the furnace door is closed, so that the core temperature of the annular ear hardware fitting is continuously dispersed outwards, the annular ear hardware fitting keeps warm by utilizing the waste heat of the annular ear hardware fitting, and the temperature in the furnace is increased; when the temperature in the furnace is higher than 700 ℃, repeating the air cooling step; and when the final temperature in the furnace is 675-690 ℃, executing a furnace-following cooling zone, and naturally cooling the annular ear hardware fitting in the furnace along with the furnace.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311135121.2A CN117123710A (en) | 2023-09-05 | 2023-09-05 | A ring-shaped earring forging mold and its forging process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311135121.2A CN117123710A (en) | 2023-09-05 | 2023-09-05 | A ring-shaped earring forging mold and its forging process |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0278306A2 (en) * | 1987-02-12 | 1988-08-17 | Eaton Corporation | Method for producing a family of forged ring rolling preforms and forging die therefor |
| CN102688970A (en) * | 2012-06-19 | 2012-09-26 | 无锡鼎宇机械科技有限公司 | D-shaped ring forging mold, and method for enhancing yield and guaranteeing even thickness |
| CN104858344A (en) * | 2015-05-19 | 2015-08-26 | 第一拖拉机股份有限公司 | Manufacturing method for large driving wheel forged pieces |
| TW201728382A (en) * | 2016-02-03 | 2017-08-16 | Moderne Tech Corp | Manufacturing method of metal ring part comprising the steps: blanking, forging for preformation, punching and edge cutting as well as forging for final formation |
| CN107282839A (en) * | 2017-08-01 | 2017-10-24 | 台州市宇鹏机械锻造有限公司 | A kind of forging technology of forging |
-
2023
- 2023-09-05 CN CN202311135121.2A patent/CN117123710A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0278306A2 (en) * | 1987-02-12 | 1988-08-17 | Eaton Corporation | Method for producing a family of forged ring rolling preforms and forging die therefor |
| CN102688970A (en) * | 2012-06-19 | 2012-09-26 | 无锡鼎宇机械科技有限公司 | D-shaped ring forging mold, and method for enhancing yield and guaranteeing even thickness |
| CN104858344A (en) * | 2015-05-19 | 2015-08-26 | 第一拖拉机股份有限公司 | Manufacturing method for large driving wheel forged pieces |
| TW201728382A (en) * | 2016-02-03 | 2017-08-16 | Moderne Tech Corp | Manufacturing method of metal ring part comprising the steps: blanking, forging for preformation, punching and edge cutting as well as forging for final formation |
| CN107282839A (en) * | 2017-08-01 | 2017-10-24 | 台州市宇鹏机械锻造有限公司 | A kind of forging technology of forging |
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