CN114799777B - Method for processing special-shaped long strip-shaped curved surface part - Google Patents
Method for processing special-shaped long strip-shaped curved surface part Download PDFInfo
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- CN114799777B CN114799777B CN202210757934.4A CN202210757934A CN114799777B CN 114799777 B CN114799777 B CN 114799777B CN 202210757934 A CN202210757934 A CN 202210757934A CN 114799777 B CN114799777 B CN 114799777B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
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Abstract
The invention relates to the technical field of machining, and discloses a method for machining a special-shaped long-strip-shaped curved surface part. Aiming at the structural characteristics of the special-shaped long-strip-shaped curved surface part, the special-shaped long-strip-shaped curved surface part is formed between the adjacent special-shaped grooves by adopting a mode of processing the special-shaped long-strip-shaped curved surface part on the steel pipe, so that the clamping and positioning are convenient in the part processing process, the processing conditions are easy to meet, the processing of the part is better realized, the whole processing process is convenient to operate, the processing efficiency is improved, and the processing precision of the part is well ensured.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a method for machining a special-shaped long-strip-shaped curved surface part.
Background
In the process of processing the incoming and outgoing line slots in the transmitting tube, a strip-shaped cover plate matched with the incoming and outgoing line slots needs to be installed above the processed incoming and outgoing line slots, and the strip-shaped cover plate and the incoming and outgoing line slots form the incoming and outgoing line slots together. As shown in fig. 1, the strip-shaped cover plate is covered and installed on the outer wall of the transmitting tube, and is a spiral line type matched with the rifling groove in the length direction and an arc surface matched with the outer wall of the transmitting tube in the width direction, so that the shape is complex. Moreover, as the incoming complex line groove needs to be completely covered, the length of the part is usually more than 1 m; meanwhile, in order to facilitate the fixed connection of the cover plate on the transmitting tube, the width of the cover plate is usually slightly larger than that of the multiplex slot, and the width of the cover plate is often only more than ten millimeters. And the inner arc surface of the strip-shaped cover plate forms a working surface of the compound line groove, so that the processing precision requirements on the inner arc surface and the width of the part are high, wherein the processing precision requirements on the inner arc surface and the width of the part are between 0 and-0.05.
When a part with the special-shaped structure is machined by adopting a traditional numerical milling mode, due to the complex structure, a four-axis linkage numerical milling machine tool is generally required to be used for machining, great difficulties exist in the aspects of clamping and fixing, secondary clamping and positioning and the like of the part in the machining process, the machining efficiency is low, and the machining precision is difficult to guarantee. Meanwhile, due to the long strip structure characteristic of the part and high hardness (32-36 HRC), a large cutting force can be generated in the machining process, and the part is easy to deform and cannot meet the requirement on machining precision.
Disclosure of Invention
The invention provides a method for processing the special-shaped strip-shaped curved surface part, aiming at the technical problems existing in the processing process of the special-shaped strip-shaped curved surface part.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the method for processing the special-shaped long-strip curved surface part comprises the steps of processing at least two special-shaped grooves penetrating through a round tube along the longitudinal direction of the round tube, wherein the special-shaped grooves are of any continuous curve-shaped structures in the length direction, and forming the special-shaped long-strip curved surface part between two adjacent special-shaped grooves.
As a further improvement of the above technical solution, the special-shaped groove formed by processing and molding on the circular tube is a groove with two closed ends, so that two ends of the molded special-shaped long-strip curved surface part are respectively connected to the circular tube, and then the special-shaped long-strip curved surface part is cut off from the circular tube at the positions of the two ends to obtain the special-shaped long-strip curved surface part.
As a further improvement of the above technical solution, more than two special-shaped grooves are processed on a circular tube along the circumferential direction thereof, a special-shaped strip-shaped curved surface part is formed between every two adjacent special-shaped grooves, and then the two ends of the circular tube are cut off at the positions of the two ends of the special-shaped grooves, so as to obtain a plurality of special-shaped strip-shaped curved surface parts.
As a further improvement to the technical scheme, in the process of processing the special-shaped groove on the circular tube, one or more sections of connecting sections with certain width and thickness are processed and formed at the positions close to the bottom of the special-shaped groove, and the connecting sections are used for connecting the parts, positioned at the two sides of the special-shaped groove, on the circular tube.
As a further improvement to the above technical solution, a connecting section is formed at least at a position located near the middle in the length direction of the profiled groove.
As a further improvement to the above technical solution, after the machining of the special-shaped groove is completed, the connecting section is machined off from the circular tube before the special-shaped long-strip-shaped curved surface part is cut off from the circular tube.
As a further improvement to the technical scheme, the inner surface and the outer surface of the circular tube are machined to the design requirements of the inner surface and the outer surface of the special-shaped long strip-shaped curved surface part on size and precision before the special-shaped groove is machined.
As a further improvement to the technical scheme, the round pipe is firstly subjected to heat treatment to the hardness required by the design of the special-shaped long strip-shaped curved surface part before being processed.
As a further improvement to the above technical solution, the irregular groove is formed in a spiral shape in a longitudinal direction.
Aiming at the structural characteristics of the special-shaped long-strip-shaped curved surface part, the special-shaped long-strip-shaped curved surface part is formed between the adjacent special-shaped grooves by adopting a mode of processing the special-shaped long-strip-shaped curved surface part on the steel pipe, so that the part is convenient to clamp and position in the processing process, the processing conditions are easy to meet, the processing of the part is better realized, the whole processing process is convenient to operate, the processing efficiency is improved, and the processing precision of the part is well ensured.
In the process of machining the special-shaped groove, the two end parts close to the steel pipe are reserved and not machined, positioning and clamping are conducted in the machining process, and meanwhile the two ends of the part to be formed are fixedly connected to the steel pipe all the time in the whole machining process, so that the influence of cutting force on the part in the machining process can be reduced, the part is prevented from deforming, and the machining precision of the part is guaranteed. At the moment, the special-shaped grooves are machined on the steel pipe at the same time, so that the machining of multiple parts can be completed at the same time, and the machining efficiency is greatly improved.
In the in-process in processing dysmorphism groove, keep one section to be annular linkage segment not processing at the intermediate position in dysmorphism groove, connect the fashioned part of steel pipe/that is located dysmorphism groove both sides through this linkage segment, keep the wholeness of steel pipe to can reduce the deformation that cutting force brought to the part in the course of working in dysmorphism groove, make the part machining precision can reach the design requirement.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and it is obvious for those skilled in the art that other related drawings can be obtained according to these drawings without inventive efforts.
Fig. 1 is a schematic structural view of a long-strip-shaped cover plate part to be processed and formed in the invention.
Fig. 2 is a schematic structural diagram of a special-shaped groove and a connecting section in the special-shaped groove machined on a circular tube in the invention.
Fig. 3 is a front view of the structure shown in fig. 2.
Fig. 4 is a schematic cross-sectional view taken along line C-C in fig. 3.
Fig. 5 is a schematic structural view of a strip-shaped cover plate part formed on a steel pipe in the invention.
In the figure: 1. the long-strip-shaped cover plate part comprises a long-strip-shaped cover plate part 2, a connecting section 3 and a special-shaped groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
The processing method of the present invention will be described in detail by taking the example of processing and forming the strip-shaped cover plate part 1 shown in fig. 1, wherein the strip-shaped cover plate part is used for being mounted on a multiplex line slot processed on the outer surface of a transmitting tube, and forms a multiplex line slot structure in the transmitting tube together with the multiplex line slot on the outer surface of the transmitting tube. The whole part of the strip-shaped cover plate is of a strip-shaped structure, the strip-shaped cover plate is in a spiral shape matched with the line returning groove in the length direction, the side surfaces of two sides of the strip-shaped cover plate are spiral line profiles, and the strip-shaped cover plate is an arc surface matched with the outer wall of the transmitting tube in the width direction. In machining size, the length of the long strip-shaped cover plate part is usually more than 1m, the width is only more than ten millimeters, the precision of the inner arc surface of the part is required to be 0-0.05, the precision of the part in the width direction is also required to be 0-0.05, the requirement on the whole machining precision is high, and the machining difficulty is large. Meanwhile, the part has high requirements on hardness, for example, 45 steel is adopted, the hardness requirement after modulation reaches 32-36 HRC, heat treatment is required before machining, and the part is easy to deform due to the fact that the material has high hardness and the cutting force generated in the machining process is large.
Aiming at the parts, a traditional processing mode is adopted, a special clamping tool needs to be designed, only 1 part can be processed by adopting a 4-axis linkage numerical control machine tool in one day, the requirement on the processing capacity of processing personnel is high, the processing efficiency is low, the processing quality and precision are difficult to ensure even if the processing capacity is high, and the processing rejection rate is high.
According to the structural characteristics of the strip-shaped cover plate part, a steel pipe with a proper specification is selected, the steel pipe is clamped, then special-shaped grooves which are matched with the strip-shaped cover plate part and are in a spiral line shape are machined in the steel pipe along the longitudinal direction of the steel pipe, and the strip-shaped cover plate part can be obtained by molding between two adjacent special-shaped grooves.
The machining method of the invention is further explained by combining the specific machining process of the elongated cover plate part, and comprises the following steps:
s1, selecting a steel pipe with a proper specification, wherein the inner diameter and the outer diameter of the steel pipe are matched with the diameters of the cambered surfaces of the inner surface and the outer surface of the strip-shaped cover plate part, and carrying out heat treatment on the steel pipe to enable the hardness of the steel pipe to meet the hardness requirement of the strip-shaped cover plate part; and respectively machining the inner surface and the outer surface of the steel pipe to the designed required size and precision of the inner surface and the outer surface of the part on a numerical control lathe.
S2, on a 4-axis linkage numerical control milling machine, fixing and clamping two ends of a processed steel pipe, setting processing parameters, sequentially processing a spiral line-shaped special-shaped groove 3 on the steel pipe along the circumferential direction of the steel pipe, wherein the special-shaped groove 3 is a groove with two closed ends on a circular pipe, a strip-shaped cover plate part 1 is formed between every two adjacent special-shaped grooves at the moment, and two ends of the strip-shaped cover plate part are fixedly connected to the steel pipe respectively. By adopting the processing mode, the steel pipe is processed on the numerical control milling machine, not only is the clamping and the positioning convenient, but also the stable connection can be formed between the strip-shaped cover plate and the steel pipe all the time in the process of forming the strip-shaped cover plate part, so that the deformation can be effectively prevented in the processing process of the part.
Because the long strip-shaped cover plate part is long and irregular in shape, and the cutting force in the machining process is large, the integral stability of the part is difficult to ensure only by the fixed connection of the two ends of the long strip-shaped cover plate part; therefore, in the process of machining and forming the special-shaped groove on the steel pipe, when the special-shaped groove is milled, one or more sections are left at the position close to the bottom of the special-shaped groove and are not milled, at the moment, one or more sections of the connecting section 2 with certain width and thickness are formed at the bottom of the special-shaped groove, and the parts at two sides of the special-shaped groove are connected in the machining process of the special-shaped groove through the connecting section. In the setting of linkage segment, lie in the position department processing shaping one section linkage segment of leaning on the centre on dysmorphism groove length direction at least, like this at the fashioned in-process in dysmorphism groove, the linkage segment is connected the steel pipe part of its both sides at dysmorphism groove intermediate position to the stable connection of rectangular shape apron part on the steel pipe in the course of working of multiplicable reduces the deformation that cutting force leads to. As shown in fig. 2, 3 and 4, the width and thickness of the connecting section can be set as required, for example, the thickness is reserved to be 0.05mm, so that stable connection can be maintained, and the connecting section can be removed conveniently in subsequent processing.
And S3, after the machining of all the special-shaped grooves in the circumferential direction on the steel pipe is completed, milling off the connecting sections reserved in the previous step, as shown in fig. 5, and then cutting off the two ends of the steel pipe at the positions at the two ends of the special-shaped grooves, so that a plurality of special-shaped long strip-shaped curved surface parts can be obtained.
The invention divides the processing process aiming at the special-shaped long-strip curved surface part into the step of processing the inner surface and the outer surface of the steel pipe and the step of processing the special-shaped groove on the steel pipe, and converts the processing of each forming surface of the special-shaped long-strip curved surface part into the processing operation of the steel pipe, so that the clamping in the processing process is simpler, the clamping positioning precision is high, and a special clamping tool does not need to be additionally designed. By decomposing the steps, each molding surface of the part is processed in different steps, so that the processing process of some molding surfaces which are difficult to process is simplified, and the processing precision of each processing surface of the part can be well ensured; simultaneously, through controlling the course of working in the dysmorphism groove on the steel pipe, can prevent that the part from taking place deformation in the course of working when guaranteeing part both sides helix profile machining precision, guarantee the processingquality of part.
After the processing method is adopted, a plurality of strip-shaped cover plate parts can be obtained by clamping and processing the steel pipe once, more than ten parts can be processed one day, and the processing efficiency is improved by more than ten times.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. used herein refer to the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the products of the present invention are used, and are used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present invention do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The method for processing the special-shaped long-strip curved surface part is characterized in that at least two special-shaped grooves penetrating through a round tube are processed on the round tube along the longitudinal direction of the round tube, the special-shaped grooves are of any continuous curve-shaped structures in the length direction, and the special-shaped long-strip curved surface part is obtained by molding between two adjacent special-shaped grooves;
the special-shaped groove obtained by processing and forming on the round tube is a groove with two closed ends, so that two ends of the special-shaped long-strip curved surface part are respectively connected to the round tube, and then the special-shaped long-strip curved surface part is cut off from the round tube at the positions of the two ends to obtain the special-shaped long-strip curved surface part;
in the process of processing the special-shaped groove on the circular tube, one or more sections of connecting sections are processed and formed at the position, close to the bottom, of the special-shaped groove, and the connecting sections are used for connecting parts, located on two sides of the special-shaped groove, on the circular tube;
and after the machining of the special-shaped groove is finished, before the special-shaped strip-shaped curved surface part is cut off from the circular tube, the connecting section is machined off from the circular tube.
2. The method of claim 1, wherein two or more special-shaped grooves are formed in the circular tube along the circumferential direction thereof, a special-shaped long-strip-shaped curved surface part is formed between each two adjacent special-shaped grooves, and then the two ends of the circular tube are cut off at the positions of the two ends of the special-shaped grooves, thereby obtaining a plurality of special-shaped long-strip-shaped curved surface parts.
3. The method of claim 1 wherein the connecting section is formed at least at a position intermediate in the longitudinal direction of the shaped groove.
4. The method of processing a special-shaped elongated curved surface part according to claim 1, wherein the inner surface and the outer surface of the circular tube are processed to the design required dimensions and accuracy of the inner surface and the outer surface of the special-shaped elongated curved surface part before the processing of the special-shaped groove.
5. The method of claim 1 wherein the round tube is heat treated to a hardness required by the design of the shaped elongated curved surface part prior to machining.
6. The method of processing a shaped elongated curved surface part according to claim 1, wherein the shaped grooves are formed in a spiral shape in a longitudinal direction.
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