CN112247053A - Production process of damper bushing blank - Google Patents
Production process of damper bushing blank Download PDFInfo
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- CN112247053A CN112247053A CN202011003403.3A CN202011003403A CN112247053A CN 112247053 A CN112247053 A CN 112247053A CN 202011003403 A CN202011003403 A CN 202011003403A CN 112247053 A CN112247053 A CN 112247053A
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- 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
- 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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Abstract
The application discloses production technology of bumper shock absorber bush blank relates to cold-heading technical field, and it includes following step: s1, cutting in sections; s2, primary cold heading; s3, secondary cold heading; s4, carrying out tertiary cold heading; s5, cold heading for four times; s6, performing five times of cold heading; and S7, final cold heading. The application has the following advantages and effects: through setting up continuous multistation cold-heading continuous production technology, replace traditional machining instrument car and repair technology to adopt multistation cold-heading one shot forming, the effectual production efficiency who improves the bumper shock absorber bush blank. By adopting the multi-station cold heading continuous production process, the loss of the stub bar and the stub bar is effectively reduced, the waste of resources is reduced, and the production cost is saved.
Description
Technical Field
The application relates to the technical field of cold heading, in particular to a production process of a shock absorber bushing blank.
Background
The shock absorber is used for inhibiting the shock when the spring absorbs the shock and rebounds and the impact from the road surface, wherein the shock absorber lining blank is an important accessory on the automobile shock absorber and mainly plays a role of a liner for reducing the abrasion of the shock absorber.
In the related art, the damper bushing blank is generally manufactured by a method of cutting materials or turning and repairing a steel pipe material machine processing instrument, and the processing procedure is complex, so that the problem of reducing the production efficiency of the damper bushing blank is solved and needs to be improved.
Disclosure of Invention
In order to improve the production efficiency of the blank of the shock absorber bushing, the application aims to provide a production process of the blank of the shock absorber bushing.
The application provides a production technology of bumper shock absorber bush blank adopts following technical scheme: a production process of a shock absorber bushing blank comprises the following steps:
s1, cutting in sections, namely equally cutting the precisely-drawn and sized bar stock into blank raw material pieces with the same length, and then transmitting the blank raw material pieces to a cold heading forming machine;
s2, performing primary cold heading, namely, transmitting the blank raw material piece into a first die of a cold heading forming machine, and then performing cold heading manufacturing in a die cavity of the first die to enable two ends of the blank raw material piece in the first die to form chamfers;
s3, secondary cold heading, namely continuously transmitting the blank raw material piece formed by the first die into a second die of a cold heading forming machine, and then performing cold heading manufacturing in a die cavity of the second die;
at the moment, the same rails are formed at two ends of the blank raw material piece in the second die, and meanwhile, inclined transition steps are formed between a pair of rails and the outer wall of the blank raw material piece;
when cold heading manufacturing is carried out in the die cavity of the second die, a counter bore is formed in the center of one rail in a cold heading mode;
s4, carrying out cold heading for three times, continuously transmitting the blank raw material piece formed by the second die into a third die of a cold heading forming machine, then carrying out cold heading manufacturing in a die cavity of the third die, and continuously deepening a counter sink on the blank raw material piece in the third die;
s5, cold heading for four times, namely, continuously transmitting the blank raw material piece formed by the third die into a fourth die of a cold heading forming machine, and then performing cold heading manufacturing in a die cavity of the fourth die, wherein at the moment, the counter sink on the blank raw material piece in the third die is continuously deepened;
s6, performing five times of cold heading, continuously transmitting the blank raw material piece formed by the fourth die into a fifth die of a cold heading forming machine, and then performing cold heading manufacturing in a die cavity of the fifth die, wherein at the moment, the counter sink on the blank raw material piece in the fifth die is continuously deepened;
and S7, performing final cold heading, continuously transmitting the blank raw material piece formed by the fifth die into a sixth die of the cold heading forming machine, and performing cold heading manufacturing in a die cavity of the sixth die, wherein at the moment, the counter sink on the blank raw material piece in the sixth die is completely penetrated.
Through adopting above-mentioned technical scheme, through setting up continuous multistation cold-heading continuous production technology, replace traditional machining instrument car and repair technology to adopt multistation cold-heading one shot forming, the effectual production efficiency who improves the bumper shock absorber bush blank. Meanwhile, a multi-station cold heading continuous production process is adopted, so that the loss of the stub bar and the stub bar is effectively reduced, the waste of resources is reduced, and the production cost is saved.
Optionally: in the cold heading manufacture at step S2, the total axial length of the entire blank stock piece is maintained constant, increasing its diameter.
By adopting the technical scheme and the accurate process steps, the directional cold heading of the blank raw material piece is realized, so that the stable cold heading of the blank raw material piece can be realized in the cold heading manufacturing of the step S2, the internal structural strength is ensured, and the phenomenon of wire drawing or fault is avoided.
Optionally: in the cold heading manufacturing at step S3, the blank raw material piece includes a pair of heads and a body between the pair of heads, and at this time the diameter of the body of the formed blank raw material piece is increased while the total axial length of the entire blank raw material piece is reduced.
By adopting the technical scheme and the accurate process steps, the directional cold heading of the blank raw material piece is realized, so that the stable cold heading of the blank raw material piece can be realized in the cold heading manufacturing of the step S3, the internal structural strength is ensured, and the phenomenon of wire drawing or fault is avoided.
Optionally: in the cold heading manufacture at step S4, the diameter of the body of the formed blank stock piece is increased, and the diameter of the riser is maintained constant and the axial length is increased while the total axial length of the entire blank stock piece is increased.
By adopting the technical scheme and the accurate process steps, the directional cold heading of the blank raw material piece is realized, so that the stable cold heading of the blank raw material piece can be realized in the cold heading manufacturing of the step S4, the internal structural strength is ensured, and the phenomenon of wire drawing or fault is avoided.
Optionally: in the cold heading manufacture at step S5, the riser diameter and axial length of the formed blank stock piece are maintained constant while the diameter and axial length of the body are increased.
By adopting the technical scheme and the accurate process steps, the directional cold heading of the blank raw material piece is realized, so that the stable cold heading of the blank raw material piece can be realized in the cold heading manufacturing of the step S5, the internal structural strength is ensured, and the phenomenon of wire drawing or fault is avoided.
Optionally: in the cold heading manufacturing at step S6, the riser diameter and the axial length of the formed blank raw material piece are maintained constant while the diameter of the main body is maintained constant, so that the axial length thereof is increased.
By adopting the technical scheme and the accurate process steps, the directional cold heading of the blank raw material piece is realized, so that the stable cold heading of the blank raw material piece can be realized in the cold heading manufacturing of the step S6, the internal structural strength is ensured, and the phenomenon of wire drawing or fault is avoided.
Optionally: in the cold heading manufacturing of step S7, the riser diameter and the axial length of the formed blank raw material piece are maintained constant while the diameter of the main body is increased and the axial length is decreased.
By adopting the technical scheme and the accurate process steps, the directional cold heading of the blank raw material piece is realized, so that the stable cold heading of the blank raw material piece can be realized in the cold heading manufacturing of the step S7, the internal structural strength is ensured, and the phenomenon of wire drawing or fault is avoided.
Optionally: in the cold heading manufacture at step S3, the depth of the counter bore is equal to the axial length of the rail.
Through adopting above-mentioned technical scheme, when carrying out the cold-heading to the counter bore, guarantee earlier that the degree of depth of counter bore equals with the axial length of riser, can realize the preforming of counter bore, can reduce the holding capacity of the main part of blank raw materials spare simultaneously, avoid the inside wire drawing or the fault phenomenon that appears of main part of blank raw materials spare.
Optionally: in the cold heading manufacture of steps S4 and S5, each feed depth of the counter sink is 2 times the previous feed depth.
Through adopting above-mentioned technical scheme, through guaranteeing that the degree of depth of feeding at every turn of counter sink is 2 times of the degree of depth of feeding last time, the ration when realizing the counter sink cold-heading is fed, guarantees the shaping effect of counter sink, avoids the inside wire drawing or fault phenomenon to appear of blank raw materials spare.
Optionally: step S0 is also included before step S1, and step S0 is as follows:
s0, preprocessing, namely, carrying out phosphate surface treatment on the billet raw material, and then sequentially carrying out spheroidizing annealing, phosphate coating treatment and fine drawing sizing treatment on the billet raw material.
By adopting the technical scheme, the pretreatment of the billet raw material is realized by additionally arranging the pretreatment step, and the performance of the billet raw material is ensured from the root, so that the performance and the service life of the finished product damper bushing blank are ensured.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the continuous multi-station cold heading continuous production process is arranged to replace the traditional machining instrument turning process, and the multi-station cold heading one-step forming is adopted, so that the production efficiency of the shock absorber bushing blank is effectively improved;
2. by adopting the multi-station cold heading continuous production process, the loss of the stub bar and the stub bar is effectively reduced, the waste of resources is reduced, and the production cost is saved;
3. the oriented cold heading of the blank raw material piece is realized by adopting precise process steps, so that in the cold heading manufacturing of the step S3, the step S4, the step S5, the step S6 and the step S7, the stable cold heading of the blank raw material piece can be realized, the internal structural strength is ensured, and the phenomenon of wire drawing or fault is avoided;
4. by ensuring that the feeding depth of each time of the counter sink is 2 times of the feeding depth of the last time, the quantitative feeding during the cold heading of the counter sink is realized, the forming effect of the counter sink is ensured, and the phenomenon of wire drawing or fault inside a blank raw material piece is avoided;
5. the pretreatment step is added, so that the pretreatment of the billet raw material is realized, and the performance of the billet raw material is ensured from the root, thereby ensuring the performance and the service life of the finished product damper bushing blank.
Drawings
FIG. 1 is a flow chart of an embodiment.
Detailed Description
The present application is described in further detail below with reference to fig. 1.
A production process of a shock absorber bushing blank comprises the following steps:
s0, preprocessing, namely, carrying out phosphate surface treatment on the billet raw material, and then sequentially carrying out spheroidizing annealing, phosphate coating treatment and fine drawing sizing treatment on the billet raw material. Thereby guaranteeing the performance of the billet raw material at the root, and further guaranteeing the performance and the service life of the finished product of the damper bushing blank.
And S1, cutting in sections, namely equally cutting the precisely-drawn and sized bar stock into blank raw material pieces with the same length, and then conveying the blank raw material pieces into a cold heading forming machine.
S2, primary cold heading, namely, conveying the blank raw material piece into a first die of a cold heading forming machine, and then performing cold heading manufacturing in a die cavity of the first die to enable two ends of the blank raw material piece in the first die to form chamfers.
At the same time, the overall axial length of the entire blank stock piece is maintained constant, increasing its diameter.
And S3, secondary cold heading, namely continuously transmitting the blank raw material piece formed by the first die into a second die of a cold heading forming machine, and then performing cold heading manufacturing in a die cavity of the second die.
At the moment, the two ends of the blank raw material piece in the second die form the same rail, and meanwhile, an inclined transition step is formed between the pair of rails and the outer wall of the blank raw material piece.
And when cold heading manufacturing is carried out in the die cavity of the second die, a counter bore is cold headed at the central position of one of the heads, and the depth of the counter bore is equal to the axial length of the head.
Meanwhile, the blank raw material piece comprises a pair of heads and a main body positioned between the heads, the diameter of the main body of the formed blank raw material piece is increased, and the total axial length of the whole blank raw material piece is reduced.
And S4, carrying out cold heading for three times, continuously transmitting the blank raw material piece formed by the second die into a third die of a cold heading forming machine, and then carrying out cold heading manufacturing in a die cavity of the third die, wherein at the moment, the counter sink on the blank raw material piece in the third die is continuously deepened.
At the same time, the main body diameter of the formed blank stock piece is increased, and the diameter of the rail is maintained constant and the axial length is increased while the overall axial length of the entire blank stock piece is increased.
And S5, cold heading for four times, namely, continuously transmitting the blank raw material piece formed by the third die into a fourth die of the cold heading forming machine, and then performing cold heading manufacturing in a die cavity of the fourth die, wherein at the moment, the counter sink on the blank raw material piece in the third die is continuously deepened.
Meanwhile, the riser diameter and the axial length of the formed blank raw material piece are kept unchanged, and the diameter and the axial length of the main body are increased.
And S6, performing five times of cold heading, continuously transmitting the blank raw material piece formed by the fourth die into a fifth die of a cold heading forming machine, and performing cold heading manufacturing in a die cavity of the fifth die, wherein at the moment, the counter sink on the blank raw material piece in the fifth die is continuously deepened.
Meanwhile, the riser diameter and the axial length of the formed blank raw material piece are kept unchanged, and the diameter of the main body is kept unchanged, so that the axial length of the main body is increased.
In the cold heading manufacturing of the step S4 and the step S5, quantitative feeding during the cold heading of the counter bore is realized by ensuring that the feeding depth of the counter bore is 2 times of the feeding depth of the counter bore at the last time, the forming effect of the counter bore is ensured, and the phenomenon of wire drawing or fault phenomenon in the blank raw material piece is avoided.
And S7, performing final cold heading, continuously transmitting the blank raw material piece formed by the fifth die into a sixth die of the cold heading forming machine, and performing cold heading manufacturing in a die cavity of the sixth die, wherein at the moment, the counter sink on the blank raw material piece in the sixth die is completely penetrated.
At the same time, the riser diameter and axial length of the formed blank stock piece remain unchanged, while the diameter of the body increases and the axial length decreases. And in the process of the steps S2-S7, the work piece is clamped and transmitted by the Harvard die, so that the continuity and the efficiency of the work piece in processing are ensured.
Because the work piece will produce a large amount of heats when cold heading the work piece by the cold heading machine, along with the rising of work piece, the decarbonization phenomenon will appear in the hole inner wall, and the hardness of hole inner wall will reduce this moment. Therefore, in the process of steps S2-S6, when cold heading is performed on the blank raw material piece, small dry ice particles are thrown into the holes of the blank raw material piece before each cold heading by the cold heading machine. Therefore, when the cold heading machine performs cold heading, the inner wall of the hole is rapidly cooled by the dry ice, so that one-time quenching treatment is realized during workpiece cold heading, the hardness, the impact toughness, the fatigue strength and the wear resistance of the inner wall of the hole are improved, and the service life of a finished product is prolonged.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The production process of the shock absorber bushing blank is characterized by comprising the following steps of: the method comprises the following steps:
s1, cutting in sections, namely equally cutting the precisely-drawn and sized bar stock into blank raw material pieces with the same length, and then transmitting the blank raw material pieces to a cold heading forming machine;
s2, performing primary cold heading, namely, transmitting the blank raw material piece into a first die of a cold heading forming machine, and then performing cold heading manufacturing in a die cavity of the first die to enable two ends of the blank raw material piece in the first die to form chamfers;
s3, secondary cold heading, namely continuously transmitting the blank raw material piece formed by the first die into a second die of a cold heading forming machine, and then performing cold heading manufacturing in a die cavity of the second die;
at the moment, the same rails are formed at two ends of the blank raw material piece in the second die, and meanwhile, inclined transition steps are formed between a pair of rails and the outer wall of the blank raw material piece;
when cold heading manufacturing is carried out in the die cavity of the second die, a counter bore is formed in the center of one rail in a cold heading mode;
s4, carrying out cold heading for three times, continuously transmitting the blank raw material piece formed by the second die into a third die of a cold heading forming machine, then carrying out cold heading manufacturing in a die cavity of the third die, and continuously deepening a counter sink on the blank raw material piece in the third die;
s5, cold heading for four times, namely, continuously transmitting the blank raw material piece formed by the third die into a fourth die of a cold heading forming machine, and then performing cold heading manufacturing in a die cavity of the fourth die, wherein at the moment, the counter sink on the blank raw material piece in the third die is continuously deepened;
s6, performing five times of cold heading, continuously transmitting the blank raw material piece formed by the fourth die into a fifth die of a cold heading forming machine, and then performing cold heading manufacturing in a die cavity of the fifth die, wherein at the moment, the counter sink on the blank raw material piece in the fifth die is continuously deepened;
and S7, performing final cold heading, continuously transmitting the blank raw material piece formed by the fifth die into a sixth die of the cold heading forming machine, and performing cold heading manufacturing in a die cavity of the sixth die, wherein at the moment, the counter sink on the blank raw material piece in the sixth die is completely penetrated.
2. The process for producing a shock absorber bushing blank according to claim 1, wherein: in the cold heading manufacture at step S2, the total axial length of the entire blank stock piece is maintained constant, increasing its diameter.
3. The process for producing a shock absorber bushing blank according to claim 2, wherein: in the cold heading manufacturing at step S3, the blank raw material piece includes a pair of heads and a body between the pair of heads, and at this time the diameter of the body of the formed blank raw material piece is increased while the total axial length of the entire blank raw material piece is reduced.
4. A process for producing a shock absorber bushing blank according to claim 3, wherein: in the cold heading manufacture at step S4, the diameter of the body of the formed blank stock piece is increased, and the diameter of the riser is maintained constant and the axial length is increased while the total axial length of the entire blank stock piece is increased.
5. The process for producing a shock absorber bushing blank according to claim 4, wherein: in the cold heading manufacture at step S5, the riser diameter and axial length of the formed blank stock piece are maintained constant while the diameter and axial length of the body are increased.
6. The process for producing a shock absorber bushing blank according to claim 5, wherein: in the cold heading manufacturing at step S6, the riser diameter and the axial length of the formed blank raw material piece are maintained constant while the diameter of the main body is maintained constant, so that the axial length thereof is increased.
7. The process for producing a shock absorber bushing blank according to claim 6, wherein: in the cold heading manufacturing of step S7, the riser diameter and the axial length of the formed blank raw material piece are maintained constant while the diameter of the main body is increased and the axial length is decreased.
8. The process for producing a shock absorber bushing blank according to claim 1, wherein: in the cold heading manufacture at step S3, the depth of the counter bore is equal to the axial length of the rail.
9. The process for producing a shock absorber bushing blank according to claim 8, wherein: in the cold heading manufacture of steps S4 and S5, each feed depth of the counter sink is 2 times the previous feed depth.
10. The process for producing a shock absorber bushing blank according to claim 1, wherein: step S0 is also included before step S1, and step S0 is as follows:
s0, preprocessing, namely, carrying out phosphate surface treatment on the billet raw material, and then sequentially carrying out spheroidizing annealing, phosphate coating treatment and fine drawing sizing treatment on the billet raw material.
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| CN202011003403.3A CN112247053B (en) | 2020-09-22 | 2020-09-22 | Production process of damper bushing blank |
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| CN202011003403.3A CN112247053B (en) | 2020-09-22 | 2020-09-22 | Production process of damper bushing blank |
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| CN112247053B CN112247053B (en) | 2022-09-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113843388A (en) * | 2021-09-28 | 2021-12-28 | 芜湖永辉汽车紧固件有限公司 | Fastener cold-heading equipment of high-efficient environmental protection |
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| CN101618422A (en) * | 2009-07-17 | 2010-01-06 | 宁波安拓实业有限公司 | Manufacturing method of internal jacket |
| CN102059306A (en) * | 2010-11-19 | 2011-05-18 | 宁波安拓实业有限公司 | Multi-station cold heading manufacturing method for plate die adjusting seat blank |
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