CN113059031A - Barrel shaping process method - Google Patents
Barrel shaping process method Download PDFInfo
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- CN113059031A CN113059031A CN202110245757.7A CN202110245757A CN113059031A CN 113059031 A CN113059031 A CN 113059031A CN 202110245757 A CN202110245757 A CN 202110245757A CN 113059031 A CN113059031 A CN 113059031A
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- shaping
- cylinder
- barrel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/14—Recontouring
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a cylinder shaping process method, which mainly comprises the following steps: s1: annealing heat treatment, wherein a heating gun is adopted to carry out annealing heat treatment on the cylinder and the welding bead; s2: mounting to a shaping tool; mounting the barrel after the annealing heat treatment is finished on a shaping tool of a shaping device; s3: shaping operation; and shaping the cylinder by using a shaping device. Before the shaping treatment, the process of annealing heat treatment on the cylinder is added, so that the hardness of the cylinder can be reduced, the plasticity of the cylinder is improved, the rolling plastic deformation of the cylinder and the residual stress generated during welding of a welding seam are removed, the situation of weld bead cracking is not easy to occur even if the cylinder is shaped in a low-temperature environment, the qualification rate of products is improved, the defective rate is reduced, and the material loss is reduced.
Description
Technical Field
The invention relates to the technical field of barrel processing, in particular to a barrel shaping process method.
Background
The cylinder body of the engine post-processing device is usually manufactured by adopting a rolling-straight seam welding process, a straight seam welding bead after welding is usually provided with a welding bead sharp corner, and the existence of the welding bead sharp corner can cause the roundness of the cylinder body to deform, so that the press-mounting operation and the press-mounting quality of a subsequent carrier are influenced, and the cylinder body needs to be further processed by a shaping process. After the barrel is manufactured, the rolling plastic deformation and residual stress are usually generated, when the barrel is shaped in a low-temperature environment (such as an operating environment with low temperature in winter in the north), the welding bead is prone to crack during the bulging shaping operation in the barrel, the welding bead cracking rate is usually more than 5%, and high defective rate and material loss are caused.
Disclosure of Invention
The applicant provides a reasonable cylinder shaping process method aiming at the defects that when the existing cylinder is shaped in an environment with low air temperature, a welding seam is easy to crack, the rejection rate and material loss are high, the material waste is caused, and the like, so that the welding seam is prevented from cracking, the rejection rate is reduced, and the material loss is reduced.
The technical scheme adopted by the invention is as follows:
a cylinder body shaping process method mainly comprises the following steps:
s1: annealing heat treatment, wherein a heating gun is adopted to carry out annealing heat treatment on the cylinder and the welding bead;
s2: mounting to a shaping tool; mounting the barrel after the annealing heat treatment is finished on a shaping tool of a shaping device;
s3: shaping operation; and shaping the cylinder by using a shaping device.
Before the shaping treatment, the process of annealing heat treatment on the cylinder is added, so that the hardness of the cylinder can be reduced, the plasticity of the cylinder is improved, the rolling plastic deformation of the cylinder and the residual stress generated during welding of a welding seam are removed, the situation of weld bead cracking is not easy to occur even if the cylinder is shaped in a low-temperature environment, the weld bead cracking rate can be controlled to be below 1%, the qualification rate of products is improved, the defective rate is reduced, and the material loss is reduced.
As a further improvement of the above technical solution:
in step S1, the barrel passes through an annealing ring and a weld bead and a weld seam white precipitation column as a mark for finishing annealing heat treatment of the corresponding point; and after the annealing heat treatment of the corresponding point positions is finished, slowly moving the heating gun upwards along the welding bead at a constant speed, and carrying out annealing heat treatment on the other point positions.
In the upward movement process of the heating gun, the annealing ring and the weld seam precipitation column slowly and uniformly move upward along with flame.
In step S1, the flame of the heating gun is directed against the weld bead of the cylinder and is slowly and uniformly moved from bottom to top to heat the weld bead.
In step S1, the distance between the tip of the heating gun and the weld bead is 4cm-6cm, and the side flame in the blue flame region of the flame is used for heating.
The distance between the spray gun head of the heating gun and the weld bead is kept between 4cm and 6cm, and the control of annealing heat treatment temperature is facilitated.
The heating gun is an industrial liquefied gas flame gun.
In step S1, the heating temperature of the cylinder is 600-700 ℃.
In step S1, the cylinder is placed upright.
In step S2, the time interval from the completion of the heat treatment to the mounting of the cylindrical body on the shaping tool is 10 to 30 seconds.
The time from the completion of heat treatment to the installation of the cylinder body to the shaping tool is short, the cylinder body is ensured to have enough windless cooling time, and meanwhile, the cylinder body is ensured to have higher temperature when being installed to the shaping tool, so that the plasticity of the cylinder body is improved during shaping treatment, the crack rate of a welding bead is reduced, the defective rate is reduced, and the material loss is reduced.
In step S3, a shaping tool and a hydraulic station are arranged at the top of the frame of the shaping device; an oil cylinder base of the shaping tool is fixed on the rack, an expansion die is arranged on the top surface of the oil cylinder base, and a mandrel penetrates through the center of the expansion die; an oil cylinder is arranged in the oil cylinder base, the oil cylinder is connected to the hydraulic station through a corresponding pipeline, and a piston rod of the oil cylinder is connected with the mandrel.
The invention has the following beneficial effects:
before the shaping treatment, the process of annealing heat treatment on the cylinder is added, so that the hardness of the cylinder can be reduced, the plasticity of the cylinder is improved, the rolling plastic deformation of the cylinder and the residual stress generated during welding of a welding seam are removed, the situation of weld bead cracking is not easy to occur even if the cylinder is shaped in a low-temperature environment, the weld bead cracking rate can be controlled to be below 1%, the qualification rate of products is improved, the defective rate is reduced, and the material loss is reduced.
The distance between the spray gun head of the heating gun and the weld bead is kept between 4cm and 6cm, and the control of annealing heat treatment temperature is facilitated.
The time from the completion of heat treatment to the installation of the cylinder body to the shaping tool is short, the cylinder body is ensured to have enough windless cooling time, and meanwhile, the cylinder body is ensured to have higher temperature when being installed to the shaping tool, so that the plasticity of the cylinder body is improved during shaping treatment, the crack rate of a welding bead is reduced, the defective rate is reduced, and the material loss is reduced.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Fig. 2 is a schematic view of the heat treatment of the can.
Fig. 3 is a schematic structural diagram of the shaping device.
Fig. 4 is a schematic structural diagram of the shaping tool.
In the figure: 1. a barrel; 11. welding a bead; 12. an annealing ring; 13. separating a white column from the welding line; 2. a heating gun; 21. a flame;
3. a shaping device; 31. a frame; 32. shaping tooling; 321. an oil cylinder base; 322. expanding the mould; 323. a mandrel; 33. and a hydraulic station.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, the cylinder shaping process method of the present invention mainly comprises the following steps:
step S1: annealing heat treatment;
step S2: mounting to a shaping tool;
step S3: and (5) shaping operation.
As shown in fig. 2, which is a schematic view of the annealing heat treatment in step S1, after the cylindrical body 1 is rolled and the round and straight seam welding is completed, the cylindrical body 1 forms a straight weld bead 11 in the axial direction. Vertically placing the cylinder body 1 on a processing table, and then carrying out annealing heat treatment on the cylinder body 1 by using a heating gun 2, wherein the specific heat treatment process comprises the following steps:
I. the heating gun 2 is started to heat the cylinder 1; the heating gun 2 adopts an industrial-grade liquefied gas flame gun, the distance between the spray gun head of the heating gun 2 and the weld bead 11 is about 4cm-6cm, the flame 21 of the heating gun 2 is opposite to the lower end part of the weld bead 11 of the cylinder 1, the side flame of the blue flame zone of the flame 21 (namely the blue flame side of the blue-yellow flame transition zone) is utilized to heat the weld bead 11 and the cylinder 1, the heating temperature of the blue flame zone of the flame 21 can reach 800-;
II. The heating gun 2 heats the lower end parts of the cylinder body 1 and the welding bead 11 to a temperature range of 600-700 ℃, in the heating process, condensed gas on the surface of the cylinder body 1 is gradually atomized and whitened in the heating process to form an annular annealing area (an annealing ring 12), and water vapor on the surface of the welding bead 11 is separated out and changed from black to white to form a columnar annealing area (a welding bead whitening column 13); when a white annealing ring 12 is formed on the cylinder 1 and a welding seam whitening column 13 is formed on the welding bead 11, it is shown that the annealing heat treatment of the point position is completed, that is, the cylinder 1 passes through the annealing ring 12 and the welding bead 11 and passes through the welding seam whitening column 13 to serve as a mark for completing the annealing heat treatment of the corresponding point position, at this time, the heating gun 2 is slowly moved upwards along the welding bead 11 at a constant speed, the annealing heat treatment is performed on the other point positions, and in the process that the heating gun 2 moves upwards, the annealing ring 12 and the welding seam whitening column 13 slowly and uniformly move upwards along with flames 21;
III, after the heating of the cylinder body 1 is finished, removing and closing the heating gun 2, and finishing the annealing heat treatment.
According to the invention, before the shaping treatment, the process of annealing heat treatment on the cylinder body 1 is added, so that the hardness of the cylinder body 1 can be reduced, the plasticity of the cylinder body can be improved, the rolling plastic deformation of the cylinder body 1 and the residual stress generated during welding of a welding seam are removed, the situation that the welding bead 11 is cracked is not easy to occur even if the cylinder body 1 is subjected to shaping operation in a low-temperature environment, the cracking rate of the welding bead 11 can be controlled to be below 1%, the qualification rate of products is improved, the defective rate is reduced, and the material loss is reduced.
Step S2, after the annealing heat treatment of the cylinder 1 is completed, the cylinder 1 is mounted on the shaping tool 32 of the shaping device 3 within a specified time; the time between the completion of the heat treatment and the installation of the cylinder 1 on the shaping tool 32 is usually only 10-30 seconds, the time between the completion of the heat treatment and the installation is short, the cylinder 1 is ensured to have enough windless cooling time, and meanwhile, the cylinder 1 is ensured to have high temperature when being installed on the shaping tool 32, so that the improvement of the plasticity of the cylinder 1 during the shaping treatment is facilitated, the crack rate of the welding bead 11 is reduced, the defective rate is further reduced, and the material loss is reduced.
In step S3, after the cylindrical body 1 is mounted on the shaping device 3, the shaping device 3 performs the shaping operation of the cylindrical body 1. As shown in fig. 3 and 4, a shaping tool 32 and a hydraulic station 33 are arranged at the top of a frame 31 of the shaping device 3; an oil cylinder base 321 of the shaping tool 32 is fixed on the frame 31, an expansion die 322 is arranged on the top surface of the oil cylinder base 321, and a mandrel 323 passes through the center of the expansion die 322; an oil cylinder is arranged in the oil cylinder base 321, the oil cylinder is connected to the hydraulic station 33 (not shown in the figure) through a corresponding pipeline, and a piston rod of the oil cylinder is connected with the mandrel 323; the hydraulic station 33 supplies oil to the oil cylinder to push the piston rod to move, so that the mandrel 323 is driven to move up and down along the axial direction, a plurality of expansion blocks of the expansion die 322 are expanded or contracted outwards along the radial direction, the barrel 1 is expanded, and the shaping of the barrel 1 is realized; in the radial expansion process of the cylinder body 1, the sharp corner part of the welding bead 11 is flattened and smoothened, so that the sharp corner part is removed, and the subsequent press-fitting operation and press-fitting quality of the carrier are prevented from being influenced. After the expansion of the cylinder 1 is completed, the expansion die 322 is reset, and the cylinder 1 is taken down from the shaping tool 32 to complete the shaping operation.
According to the invention, the shaping of the cylinder body 1 is completed according to the steps, the crack of the welding bead 11 is avoided, the qualification rate of products is improved, the defective rate is reduced, and the material loss is reduced.
The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, as the invention may be modified in any manner without departing from the spirit thereof.
Claims (10)
1. A cylinder shaping process method is characterized in that: the method mainly comprises the following steps:
s1: annealing heat treatment, wherein the barrel (1) and the welding bead (11) are subjected to annealing heat treatment by adopting a heating gun (2);
s2: mounting to a shaping tool; mounting the barrel (1) after the annealing heat treatment is finished on a shaping tool (32) of a shaping device (3);
s3: shaping operation; and shaping the cylinder body (1) by using a shaping device (3).
2. A barrel shaping process according to claim 1, wherein: in step S1, the barrel (1) passes through the annealing ring (12) and the weld bead (11) and passes through the weld seam chromatographic white column (13) as a mark of completion of annealing heat treatment of the corresponding point; after the annealing heat treatment of the corresponding point positions is finished, the heating gun (2) is slowly moved upwards along the welding bead (11) at a constant speed, and the annealing heat treatment is carried out on the other point positions.
3. A barrel shaping process according to claim 2, wherein: in the process that the heating gun (2) moves upwards, the annealing ring (12) and the welding seam whitening column (13) slowly and uniformly move upwards along with the flame (21).
4. A barrel shaping process according to claim 1, wherein: in step S1, the flame (21) of the heating gun (2) is directed to the weld bead (11) of the cylinder (1) and is slowly and uniformly moved from bottom to top to heat the weld bead.
5. A barrel shaping process according to claim 1, wherein: in step S1, the distance between the tip of the heating lance (2) and the weld bead (11) is 4cm-6cm, and the side flame in the blue flame zone of the flame (21) is used for heating.
6. A barrel shaping process according to claim 1, wherein: the heating gun (2) adopts an industrial-grade liquefied gas flame gun.
7. A barrel shaping process according to claim 1, wherein: in step S1, the heating temperature of the cylinder (1) is 600-700 ℃.
8. A barrel shaping process according to claim 1, wherein: in step S1, the cylinder (1) is placed upright.
9. A barrel shaping process according to claim 1, wherein: in step S2, the time interval from completion of the heat treatment to attachment of the cylindrical body (1) to the shaping tool (32) is 10 to 30 seconds.
10. A barrel shaping process according to claim 1, wherein: in step S3, a shaping tool (32) and a hydraulic station (33) are arranged at the top of a frame (31) of the shaping device (3); an oil cylinder base (321) of the shaping tool (32) is fixed on the rack (31), an expansion die (322) is arranged on the top surface of the oil cylinder base (321), and a mandrel (323) penetrates through the center of the expansion die (322); an oil cylinder is arranged in the oil cylinder base (321), the oil cylinder is connected to the hydraulic station (33) through a corresponding pipeline, and a piston rod of the oil cylinder is connected with the mandrel (323).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110245757.7A CN113059031A (en) | 2021-03-05 | 2021-03-05 | Barrel shaping process method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110245757.7A CN113059031A (en) | 2021-03-05 | 2021-03-05 | Barrel shaping process method |
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| Publication Number | Publication Date |
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| CN113059031A true CN113059031A (en) | 2021-07-02 |
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| CN202110245757.7A Withdrawn CN113059031A (en) | 2021-03-05 | 2021-03-05 | Barrel shaping process method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102056687A (en) * | 2008-06-06 | 2011-05-11 | 艾森鲍.克莱默有限责任公司 | Method for producing a large steel tube |
| CN103381538A (en) * | 2012-05-06 | 2013-11-06 | 什邡市明日宇航工业股份有限公司 | Cabin section processing method and bulging tool used in same |
| CN107042249A (en) * | 2017-06-20 | 2017-08-15 | 凯龙高科技股份有限公司 | A kind of multistation trimmer for short thin-walled tubes part |
| CN108453149A (en) * | 2018-05-15 | 2018-08-28 | 江阴市博汇机械成套设备有限公司 | A kind of shaping tooling of large-size thin-walled cylinder body |
| CN211757763U (en) * | 2019-12-30 | 2020-10-27 | 合肥汇智新材料科技有限公司 | Inner hole shaping press |
-
2021
- 2021-03-05 CN CN202110245757.7A patent/CN113059031A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102056687A (en) * | 2008-06-06 | 2011-05-11 | 艾森鲍.克莱默有限责任公司 | Method for producing a large steel tube |
| US20110174046A1 (en) * | 2008-06-06 | 2011-07-21 | Jochem Beissel | Method for producing a large steel tube |
| CN103381538A (en) * | 2012-05-06 | 2013-11-06 | 什邡市明日宇航工业股份有限公司 | Cabin section processing method and bulging tool used in same |
| CN107042249A (en) * | 2017-06-20 | 2017-08-15 | 凯龙高科技股份有限公司 | A kind of multistation trimmer for short thin-walled tubes part |
| CN108453149A (en) * | 2018-05-15 | 2018-08-28 | 江阴市博汇机械成套设备有限公司 | A kind of shaping tooling of large-size thin-walled cylinder body |
| CN211757763U (en) * | 2019-12-30 | 2020-10-27 | 合肥汇智新材料科技有限公司 | Inner hole shaping press |
Non-Patent Citations (2)
| Title |
|---|
| 刘积文: "《石油化工设备与制造概论》", 31 July 1989 * |
| 陈裕川: "《焊接工艺评定手册》", 31 January 2000 * |
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Application publication date: 20210702 |
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