CN113199068A - Machining method for sharp corner structure of glass fiber reinforced plastic part - Google Patents
Machining method for sharp corner structure of glass fiber reinforced plastic part Download PDFInfo
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- CN113199068A CN113199068A CN202110354148.5A CN202110354148A CN113199068A CN 113199068 A CN113199068 A CN 113199068A CN 202110354148 A CN202110354148 A CN 202110354148A CN 113199068 A CN113199068 A CN 113199068A
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- reinforced plastic
- fiber reinforced
- glass fiber
- plastic part
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2226/00—Materials of tools or workpieces not comprising a metal
- B23C2226/27—Composites, e.g. fibre reinforced composites
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Abstract
The invention provides a mechanical processing method of a sharp corner structure of a glass fiber reinforced plastic part, which is characterized in that a diamond milling cutter is welded on a five-coordinate numerical control milling machine to process the glass fiber reinforced plastic part, and when the glass fiber reinforced plastic part is processed, the sharp corner structure of the glass fiber reinforced plastic part is milled firstly, and then other structures of the glass fiber reinforced plastic part are milled; the specific operation of milling the sharp-angled structure of the glass fiber reinforced plastic part is as follows: milling the inclined plane 1 of the sharp-angled structure of the glass fiber reinforced plastic part, adopting a spiral feeding mode 4 for a numerical control guide rail during milling, adopting a circular guide rail 5 to carry out rough machining and finish machining on the inclined plane 1 of the sharp-angled structure, and when machining, enabling the cutter shaft direction of the diamond milling cutter to be perpendicular to the inclined plane 1 of the sharp-angled structure, and machining the inclined plane 1 by using the bottom teeth of the diamond milling cutter. The method provided by the invention solves the quality problems of layering, whitening and the like of the sharp-angled structure of the glass fiber reinforced plastic part in the mechanical processing process due to the material characteristics and the structural characteristics.
Description
Technical Field
The invention belongs to the technical field of composite material cutting processing, and particularly relates to a mechanical processing method for a sharp corner structure of a glass fiber reinforced plastic part.
Background
Glass Fiber Reinforced Plastics (FRP), also known as GFRP, fiber reinforced plastics, generally refer to unsaturated polyester, epoxy and phenolic resin matrices reinforced with glass fibers. The reinforced plastic using glass fiber or its product as reinforcing material is called glass fiber reinforced plastic or glass fiber reinforced plastic, and is different from toughened glass.
Because of the variety of the resin used, there are polyester glass fiber reinforced plastics, epoxy glass fiber reinforced plastics and phenolic glass fiber reinforced plastics. Light weight, hardness, non-conductivity, stable performance, high mechanical strength, less recovery and corrosion resistance. Can replace steel to manufacture machine parts, automobile shells, ship shells and the like.
The glass fiber Reinforced plastic is known as Fiber Reinforced Plastic (FRP), i.e., fiber Reinforced composite plastic. The fiber is classified into glass fiber reinforced composite plastic (GFRP), carbon fiber reinforced composite plastic (CFRP), boron fiber reinforced composite plastic, and the like according to the difference of the adopted fiber. It is a composite material using glass fibre and its products (glass cloth, band, felt and yarn, etc.) as reinforcing material and synthetic resin as base material. The fiber reinforced composite material is composed of reinforcing fibers and a matrix. The diameter of the fiber (or whisker) is very small, generally below 10 mu m, the defects are few and small, the fracture strain is about thirty thousandths of a thousand, and the fiber (or whisker) is a brittle material and is easily damaged, fractured and corroded. The matrix is a tough material with much lower strength and modulus than the fiber, can bear large strain, and often has viscoelasticity and elastoplasticity
In the aviation field, since airplanes have extremely high requirements for weight and strength, glass fiber reinforced plastic materials are often used in airplane processing due to their characteristics such as light weight and high strength.
But the standards and requirements for materials are also extremely high based on aviation safety. In aerospace applications of glass reinforced plastic materials, there are often glass reinforced plastic materials with sharp corner structures. Meanwhile, because the sharp-angled structure is relatively fragile, quality defects such as layering, tearing, whitening and the like of the sharp-angled structure often occur in the traditional processing, and the delivery and use of parts are finally influenced.
Disclosure of Invention
Aiming at the problems that the sharp-angled structure is relatively fragile, the quality defects of layering, tearing, whitening and the like of the sharp-angled structure often occur in the traditional machining process, and the delivery and use of parts are finally influenced, the invention provides the mechanical machining method of the sharp-angled structure of the glass fiber reinforced plastic part.
The specific implementation content of the invention is as follows:
the invention provides a mechanical processing method of a sharp corner structure of a glass fiber reinforced plastic part, which is characterized in that a welding diamond milling cutter is adopted on a five-coordinate numerical control milling machine to process the glass fiber reinforced plastic part, and when the glass fiber reinforced plastic part is processed, the sharp corner structure of the glass fiber reinforced plastic part is milled firstly, and then other structures of the glass fiber reinforced plastic part are milled; the specific operation of milling the sharp-angled structure of the glass fiber reinforced plastic part is as follows:
milling the inclined plane of the sharp-angled structure of the glass fiber reinforced plastic part, wherein the numerical control guide rail during milling adopts a spiral feeding mode, and adopts a circular guide rail to perform rough machining and finish machining on the inclined plane of the sharp-angled structure.
In order to better implement the present invention, further, in the milling process, the cutting amount is controlled by: the rotating speed of the main shaft is 3000r/min, and the feeding amount is 700 r/min.
In order to better implement the present invention, further, in the rough machining, the cutting depth of each layer was 3 mm.
In order to better implement the present invention, further, the cutting depth of each layer is 1mm when the finish machining is performed.
In order to better implement the invention, further, the spiral feeding mode adopted by the numerical control guide rail is a spiral inclined feeding mode.
In order to better implement the present invention, further, the helical slant feeding manner has a helical feed inclination angle of 3 °.
In order to better implement the invention, further, the processing track is a back-shaped guide rail from inside to outside.
In order to better implement the invention, further, the radial cut width at the time of machining is 3mm, and radial cutting delamination is performed according to the size of the inclined surface of the pointed structure.
In order to better implement the invention, further, the cutting edge material of the cutter of the welding diamond milling cutter is artificial diamond, and the number of teeth of the cutter is 4.
In order to better realize the invention, the glass fiber reinforced plastic part is further placed on a tool, the tool is placed on a five-coordinate numerical control milling machine, a process boss is installed on the tool, a compression screw is arranged on the process boss, and the glass fiber reinforced plastic part is fixed by using the compression screw and the process boss before milling.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the mechanical processing surface quality of the glass fiber reinforced plastic sharp-angled structure is improved;
(2) the phenomena of layering and whitening of the glass fiber reinforced plastic sharp-corner structure in the machining process are avoided.
Drawings
FIG. 1 is a schematic view of a typical structure of a sharp corner structure of a glass fiber reinforced plastic part;
FIG. 2 is a schematic structural diagram of a sharp-angled structure of a glass fiber reinforced plastic part placed on a tool for processing and provided with a compression screw and a process boss;
FIG. 3 is a schematic diagram of a machining trajectory for a sharp-angled structure of a GRP part.
Wherein: 1. an inclined plane, 2, a compression screw, 3, a process boss, 4, a screw feeding mode, 5 and a clip guide rail.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and therefore should not be considered as a limitation to the scope of protection. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed 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.
Example 1:
the embodiment provides a mechanical processing method of a sharp corner structure of a glass fiber reinforced plastic part, as shown in fig. 1 and 3, a diamond milling cutter is welded on a five-coordinate numerical control milling machine to process the glass fiber reinforced plastic part, and during processing, the sharp corner structure of the glass fiber reinforced plastic part is milled firstly, and then other structures of the glass fiber reinforced plastic part are milled; the specific operation of milling the sharp-angled structure of the glass fiber reinforced plastic part is as follows:
milling the inclined plane 1 of the sharp-angled structure of the glass fiber reinforced plastic part, adopting a spiral feeding mode 4 for a numerical control guide rail during milling, adopting a circular guide rail 5 to carry out rough machining and finish machining on the inclined plane 1 of the sharp-angled structure, and when machining, enabling the cutter shaft direction of the diamond milling cutter to be perpendicular to the inclined plane 1 of the sharp-angled structure, and machining the inclined plane 1 by using the bottom teeth of the diamond milling cutter.
Example 2:
in this embodiment, in order to further realize the present invention in addition to embodiment 1 described above, the amount of cutting is controlled during milling: the rotating speed of the main shaft is 3000r/min, and the feeding amount is 700 r/min.
Other parts of this embodiment are the same as those of embodiment 1, and thus are not described again.
Example 3:
in this example, in order to further improve the present invention, in addition to any one of the above examples 1 to 2, the depth of cutting per layer was further 3mm in the case of performing rough machining.
Other parts of this embodiment are the same as any of embodiments 1-2 described above, and thus are not described again.
Example 4:
in this example, in order to further improve the present invention, in addition to any one of the above examples 1 to 3, the cutting depth per layer was 1mm in the finish machining.
Other parts of this embodiment are the same as any of embodiments 1 to 3, and thus are not described again.
Example 5:
in this embodiment, on the basis of any one of the above embodiments 1 to 4, as shown in fig. 3, in order to better implement the present invention, further, the spiral feeding mode 4 adopted by the numerical control guide rail is a spiral slant feeding mode.
The working principle is as follows: a schematic diagram of the trajectory of a specific helical ramping approach is shown in fig. 3.
Other parts of this embodiment are the same as any of embodiments 1 to 4, and thus are not described again.
Example 6:
in this embodiment, based on any one of the embodiments 1 to 5, in order to better implement the present invention, the helical slant angle is 3 °.
Other parts of this embodiment are the same as any of embodiments 1 to 5, and thus are not described again.
Example 7:
in this embodiment, on the basis of any one of the above embodiments 1 to 6, in order to better implement the present invention, further, the processing track is a circular guide rail 5 from inside to outside.
The working principle is as follows: the track of the specific clip-shaped guide rail 5 is a closed loop clip-shaped track with one circle as shown in fig. 3.
Other parts of this embodiment are the same as any of embodiments 1 to 6, and thus are not described again.
Example 8:
this embodiment is based on any of the above embodiments 1 to 7, and further, in order to better implement the present invention, further, the radial cut width at the time of machining is 3mm, and radial cutting delamination is performed according to the size of the bevel 1 of the pointed structure.
Other parts of this embodiment are the same as any of embodiments 1 to 7, and thus are not described again.
Example 9:
this embodiment is based on any one of embodiments 1 to 8, and further, to better implement the present invention, further, the cutting edge material of the welding diamond milling cutter is artificial diamond, and the number of teeth of the cutter teeth is 4.
Other parts of this embodiment are the same as any of embodiments 1 to 8, and thus are not described again.
Example 10:
in this embodiment, on the basis of any one of the above embodiments 1 to 9, as shown in fig. 2, in order to better implement the present invention, further, the glass fiber reinforced plastic part is placed on a tool, the tool is placed on a five-coordinate numerical control milling machine, a process boss 3 is installed on the tool, a compression screw 2 is arranged on the process boss 3, and before milling, the glass fiber reinforced plastic part is fixed by using the compression screw 2 and the process boss 3.
Other parts of this embodiment are the same as any of embodiments 1 to 9, and thus are not described again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (7)
1. A mechanical processing method of a sharp corner structure of a glass fiber reinforced plastic part is characterized in that a diamond-welded milling cutter is adopted on a five-coordinate numerical control milling machine to process the glass fiber reinforced plastic part, and during processing, the sharp corner structure of the glass fiber reinforced plastic part is milled firstly, and then other structures of the glass fiber reinforced plastic part are milled; the specific operation of milling the sharp-angled structure of the glass fiber reinforced plastic part is as follows:
milling the bevel (1) of the sharp-angled structure of the glass fiber reinforced plastic part, wherein a numerical control guide rail during milling adopts a spiral feeding mode (4), and a machining track of a circular guide rail (5) is adopted to perform rough machining and finish machining on the bevel (1) of the sharp-angled structure, when machining is performed, the cutter shaft direction of a diamond milling cutter is vertical to the bevel (1) of the sharp-angled structure, and the bevel (1) is machined by using bottom teeth of the diamond milling cutter;
the spiral feeding mode (4) adopted by the numerical control guide rail is a spiral inclined feeding mode;
the spiral feed inclination angle of the spiral inclined feed mode is 3 degrees;
the processing track is a clip-shaped guide rail (5) from inside to outside.
2. The method for machining the sharp corner structure of the glass fiber reinforced plastic part according to claim 1, wherein the cutting amount is controlled by: the rotating speed of the main shaft is 3000r/min, and the feeding amount is 700 r/min.
3. A method of machining a sharp corner structure of a glass reinforced plastic part according to claim 2, wherein the depth of cut in each layer is 3mm during the roughing step.
4. A method according to claim 2, wherein the finishing operation is performed with a depth of cut of 1mm per layer.
5. A method for machining a sharp corner structure of a glass fibre reinforced plastic part according to claim 1, characterized in that the radial cut width at the time of machining is 3mm, and radial cutting delamination is performed according to the size of the bevel (1) of the sharp corner structure.
6. The method for machining a sharp corner structure of a glass fiber reinforced plastic part according to any one of claims 1 to 5, wherein the cutting edge material of the cutting tool of the welding diamond milling cutter is artificial diamond, and the number of teeth of the cutting tool is 4.
7. The machining method for the sharp corner structure of the glass fiber reinforced plastic part according to any one of claims 1 to 5, wherein the glass fiber reinforced plastic part is placed on a tool, the tool is placed on a five-coordinate numerical control milling machine, a process boss (3) is installed on the tool, a compression screw (2) is arranged on the process boss (3), and the glass fiber reinforced plastic part is fixed by using the compression screw (2) and the process boss (3) before milling.
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Cited By (1)
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CN115401528A (en) * | 2022-07-08 | 2022-11-29 | 深圳数马电子技术有限公司 | Key blank cutting method and device, numerical control machine and storage medium |
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