CN116038252A - Processing method of thin-wall long cylinder parts - Google Patents
Processing method of thin-wall long cylinder parts Download PDFInfo
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- CN116038252A CN116038252A CN202211738997.1A CN202211738997A CN116038252A CN 116038252 A CN116038252 A CN 116038252A CN 202211738997 A CN202211738997 A CN 202211738997A CN 116038252 A CN116038252 A CN 116038252A
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Abstract
The invention belongs to the field of machining, and provides a machining method for thin-wall long cylinder parts, which adopts the technical scheme of the invention to design a more mature process circulation route, control the deformation of the parts, adopt a method of firstly machining an outer circle and then machining an inner circle, reduce the problem of overlarge deformation of the thin-wall long cylinder parts in the process of machining the inner circle and the outer circle, reduce the clamping times, shorten the machining time, improve the efficiency and ensure the product quality; and through installing excircle staple bolt and interior support frock additional, effectively solved the problem that the part appears warping in the course of working.
Description
Technical Field
The invention belongs to the field of machining, and particularly relates to a machining method of a thin-wall long cylinder part.
Background
The thin-wall cylinder part is widely applied to the production and life of people, the existing thin-wall cylinder part processing technology is relatively mature, but a certain problem still exists in actual production.
If the length of the thin-wall cylinder part is longer, the thin-wall cylinder part has the effects of cutting force, clamping force, cutting temperature, self deflection, stress release and the like in the internal and external circle machining process of the part due to the thinner wall thickness of the cylinder body, the dimensional accuracy and form and position tolerance of the part can be influenced, and the deformation of the part is overlarge after the length of the part reaches a certain amount, so that the development of the thin-wall long cylinder part is severely restricted.
Therefore, the method for processing the thin-wall long cylinder part solves the problem that the deformation of the thin-wall long cylinder part is overlarge in the process of processing the inner circle and the outer circle, and is a technical problem to be solved in the field.
Disclosure of Invention
The invention provides a processing method of a thin-wall long cylinder part, which aims to solve the problem that the deformation of the thin-wall long cylinder part is overlarge in the process of processing inner and outer circles.
The invention discloses a processing method of a thin-wall long cylinder part, which sequentially comprises the following steps:
s1, dividing the finished part into a plurality of single-section cylinder sections according to the size of the finished part, and then carrying out sectional blanking;
s2, after blanking, rolling the single-section cylinder section by using a three-roller plate rolling machine, and spot welding and reinforcing the butt position;
s3, welding longitudinal joints of the single-section cylindrical sections in a submerged arc welding mode, and calibrating the cylindrical sections after welding;
s4, after standing for S1, performing radiographic inspection on longitudinal seams of the single-section cylinder sections, and repairing and welding defective local welding seams;
s5, an inner supporting ring plate is additionally arranged in the single-section cylinder section and used for preventing the single-section cylinder section from elliptical deformation in the storage process;
s6, welding a plurality of single-section cylinder sections into an integral part, welding flanges at two ends of the integral part, and performing radiographic inspection on the integral part after welding;
s7, annealing and stress-relieving the whole part;
s8, adding process plugs at flanges at two ends;
s9, rough machining is carried out on the excircle of the whole part;
s10, standing for S2 time;
s11, carrying out finish machining on the excircle of the whole part;
s12, installing a plurality of outer circle reinforcing hoops on the outer circle of the integral part for preventing elliptical deformation after the integral part is processed;
s13, roughly machining the inner diameter of the whole part;
s14, standing for S3 time;
s15, semi-finishing the inner diameter of the integral part;
s16, standing for S4 time;
s17, carrying out finish machining on the inner diameter of the integral part;
s18, processing outer circles and end faces of flanges at two ends of the integral part;
and S19, additionally installing an inner supporting tool in an inner hole of the integral part, and preventing the integral part from deforming in the storage process.
Optionally, the S1 time is 30-50 hours.
Optionally, the S2 time is 40-50 hours.
Optionally, the S3 time is 40-50 hours.
Optionally, a method of machining an end face and a groove after rolling the single-section shell ring is adopted at the step S6.
Optionally, the anchor ear is connected by a bolt and a nut.
The beneficial technical effects of implementing the invention are as follows: by using the technical scheme of the invention, a more mature process circulation route is designed, the deformation of the part is controlled, and the method of processing the outer circle and then processing the inner circle is adopted, so that the problem of overlarge deformation of the thin-wall long cylinder part in the process of processing the inner circle and the outer circle is reduced, the clamping times are reduced, the processing time is shortened, the efficiency is improved, and the product quality is ensured; and through installing excircle staple bolt and interior support frock additional, effectively solved the problem that the part appears warping in the course of working.
Drawings
FIG. 1 is a schematic diagram of the process flow of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" means two or more, and the meaning of "a number" means one or more.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
The processing method of the thin-wall long cylinder part sequentially comprises the following steps of:
s1, dividing the finished part into a plurality of single-section cylinder sections according to the size of the finished part, and then carrying out sectional blanking;
s2, after blanking, rolling the single-section cylinder section by using a three-roller plate rolling machine, and spot welding and reinforcing the butt position;
s3, welding longitudinal joints of the single-section cylindrical sections in a submerged arc welding mode, and calibrating the cylindrical sections after welding;
s4, after standing for S1, performing radiographic inspection on longitudinal seams of the single-section cylinder sections, and repairing and welding defective local welding seams;
s5, an inner supporting ring plate is additionally arranged in the single-section cylinder section and used for preventing the single-section cylinder section from elliptical deformation in the storage process;
s6, welding a plurality of single-section cylinder sections into an integral part, welding flanges at two ends of the integral part, and performing radiographic inspection on the integral part after welding;
s7, annealing and stress-relieving the whole part;
s8, adding process plugs at flanges at two ends;
s9, rough machining is carried out on the excircle of the whole part;
s10, standing for S2 time;
s11, carrying out finish machining on the excircle of the whole part;
s12, installing a plurality of outer circle reinforcing hoops on the outer circle of the integral part for preventing elliptical deformation after the integral part is processed;
s13, roughly machining the inner diameter of the whole part;
s14, standing for S3 time;
s15, semi-finishing the inner diameter of the integral part;
s16, standing for S4 time;
s17, carrying out finish machining on the inner diameter of the integral part;
s18, processing outer circles and end faces of flanges at two ends of the integral part;
s19, an inner hole of the integral part is additionally provided with an inner supporting tool for preventing the integral part from deforming in the storage process
In this example, the S1 time is 30-50 hours.
The advantage of this embodiment is that the internal stresses of the part are relieved by resting.
In this example, the S2 time is 40-50 hours.
The advantage of this embodiment is that the internal stresses of the part are relieved by resting.
In this embodiment, the S3 time is 40-50 hours.
The advantage of this embodiment is that the internal stresses of the part are relieved by resting.
In this embodiment, a method of machining an end face and a groove after rolling a single-section shell ring is adopted at step S6.
The embodiment has the advantage of being beneficial to ensuring the cylinder section assembly welding precision.
In this embodiment, the anchor ear is connected by a bolt and a nut.
The advantage of this embodiment is, bolt and nut connection stability is high, convenient to detach.
In order to prove that the processing method provided by the invention can objectively and accurately process the thin-wall long cylinder type parts, the following embodiment is particularly adopted.
Example 1
Implementation background: the total length of the existing thin-wall long cylinder part is 12000mm, the maximum outer diameter is 2446mm, the minimum inner diameter is 2388mm, and the minimum wall thickness is only 16mm.
According to the step S1, dividing into a plurality of single-section cylinder sections according to the size of the finished part, and then carrying out sectional blanking; the total length is 12000mm, and the steel plate is divided into 6 sections, and each section is 2000mm long.
According to the step S2, after blanking, a single-section cylinder section is coiled by a three-roller plate bending machine, and spot welding reinforcement is carried out on the butt joint position; when rolling to the joint, checking the joint misalignment amount to be less than 2mm, the edge angle to be less than 2mm and the end face misalignment amount to be less than 1mm, and then spot welding for reinforcement.
According to the step S3, welding longitudinal joints of the single-section cylinder sections in a submerged arc welding mode, and calibrating the cylinder sections after welding; the roundness tolerance is controlled to 1.5mm, and the cylindricity tolerance is controlled to 2.5mm.
According to the step S4, standing for S1 time, performing radiographic inspection on the longitudinal seams of the single-section cylinder sections, and repairing and welding defective local welding seams; the standing time was 48 hours.
According to step S5, an inner supporting ring plate is additionally arranged in the single-section cylinder section and used for preventing the single-section cylinder section from deforming in an elliptical manner in the storage process.
According to the step S6, welding a plurality of single-section cylinder sections into an integral part, welding flanges at two ends of the integral part, and performing radiographic inspection on the integral part after welding; the method of machining the end face and the groove after the single-section cylindrical section is rolled is adopted to ensure the cylindrical section assembling and welding precision.
According to the step S7, annealing and stress-relieving the whole part; feeding the whole part into a furnace at room temperature, and heating to 300 ℃ at a heating rate of 60-80 ℃/h; heating to 550+/-10 ℃ and then preserving heat for 4 hours; the cooling speed of the part in a heating area higher than 300 ℃ is 80-100 ℃/h, the workpiece is discharged when being cooled to room temperature along with the furnace, and the workpiece is cooled in static air after being discharged; in order to prevent the integral part from deforming in the heat treatment stress eliminating process, the inner supporting ring plate of the integral part is not removed before annealing.
According to the step S8, process plugs are additionally arranged at flanges at two ends; and preparation is carried out for excircle processing.
According to the step S9, rough machining is carried out on the excircle of the whole part; the outer circle of the integral part is processed by adopting a horizontal lathe, the middle of the integral part is clamped and aligned by utilizing an inner supporting annular plate, the deflection deformation caused by overlong workpieces is prevented, the rotating speed is controlled to be about 15r/min, the feed amount is 0.3mm/r, and the cutting depth is controlled to be 2-3mm.
According to the step S10, standing for S2 time; the standing time was 48 hours.
According to the step S11, the excircle of the whole part is finished; and (3) after the outer circle is machined, checking the straightness of the outer circle of the inner cylinder by using a feed frame and checking the roundness of the outer circle by using an outside micrometer.
According to step S12, a plurality of outer circle reinforcing hoops are additionally arranged on the outer circle of the integral part and are used for preventing elliptical deformation of the integral part after being processed.
Step S13, rough machining is carried out on the inner diameter of the whole part; rough machining the part on the inner diameter of the whole part by utilizing a special combined machine tool, rough boring the inner circle of each gear of the inner hole, and leaving allowance of 1.5-2mm on a single side; the rotating speed is 20r/min during processing, the feed amount is 0.2mm/r, and the cutting amount is 2-3mm.
According to the step S14, standing for S3 time; the standing time was 48 hours.
According to the step S15, semi-finishing is carried out on the inner diameter of the whole part; the clamping mode is the same as that of the step S13, 1mm allowance is reserved on each surface of the machining inner diameter and the groove, and the radial feeding is automatically carried out when the groove is machined.
According to the step S16, standing for S4 time; the standing time was 48 hours.
According to the step S17, the inner diameter of the whole part is finished; the movable cutter row is adopted in the machining, the machining length is not more than 450mm each time, the deflection of the cutter bar is overcome, and the coaxiality of the inner hole is ensured. The rotating speed is 20r/min during processing, the feed amount is 0.2mm/r, and the cutting feed amount is 0.5mm.
S18, processing outer circles and end faces of flanges at two ends of the integral part; and processing by using a numerical control boring and milling machine.
According to step S19, an inner supporting tool is additionally arranged in the inner hole of the integral part and used for preventing the integral part from deforming in the storage process.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (6)
1. The processing method of the thin-wall long cylinder part is characterized by comprising the following steps in sequence:
s1, dividing the finished part into a plurality of single-section cylinder sections according to the size of the finished part, and then carrying out sectional blanking;
s2, after blanking, rolling the single-section cylinder section by using a three-roller plate rolling machine, and spot welding and reinforcing the butt position;
s3, welding longitudinal joints of the single-section cylindrical sections in a submerged arc welding mode, and calibrating the cylindrical sections after welding;
s4, after standing for S1, performing radiographic inspection on longitudinal seams of the single-section cylinder sections, and repairing and welding defective local welding seams;
s5, an inner supporting ring plate is additionally arranged in the single-section cylinder section and used for preventing the single-section cylinder section from elliptical deformation in the storage process;
s6, welding a plurality of single-section cylinder sections into an integral part, welding flanges at two ends of the integral part, and performing radiographic inspection on the integral part after welding;
s7, annealing and stress-relieving the whole part;
s8, adding process plugs at flanges at two ends;
s9, rough machining is carried out on the excircle of the whole part;
s10, standing for S2 time;
s11, carrying out finish machining on the excircle of the whole part;
s12, installing a plurality of outer circle reinforcing hoops on the outer circle of the integral part for preventing elliptical deformation after the integral part is processed;
s13, roughly machining the inner diameter of the whole part;
s14, standing for S3 time;
s15, semi-finishing the inner diameter of the integral part;
s16, standing for S4 time;
s17, carrying out finish machining on the inner diameter of the integral part;
s18, processing outer circles and end faces of flanges at two ends of the integral part;
and S19, additionally installing an inner supporting tool in an inner hole of the integral part, and preventing the integral part from deforming in the storage process.
2. The method for processing the thin-wall long cylinder part according to claim 1, wherein the S1 time is 30-50 hours.
3. The method for processing the thin-wall long cylinder part according to claim 2, wherein the S2 time is 40-50 hours.
4. The method for processing the thin-wall long cylinder part according to claim 3, wherein the S3 time is 40-50 hours.
5. The method for machining the thin-wall long cylinder part according to claim 1, wherein the step S6 is a method for machining an end face and a groove after rolling a single-section cylinder section.
6. The method for machining the thin-wall long cylinder part according to claim 1, wherein the anchor ear is connected by a bolt and a nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211738997.1A CN116038252A (en) | 2022-12-31 | 2022-12-31 | Processing method of thin-wall long cylinder parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211738997.1A CN116038252A (en) | 2022-12-31 | 2022-12-31 | Processing method of thin-wall long cylinder parts |
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| Publication Number | Publication Date |
|---|---|
| CN116038252A true CN116038252A (en) | 2023-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211738997.1A Pending CN116038252A (en) | 2022-12-31 | 2022-12-31 | Processing method of thin-wall long cylinder parts |
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| CN (1) | CN116038252A (en) |
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- 2022-12-31 CN CN202211738997.1A patent/CN116038252A/en active Pending
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