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CN-122011520-A - Composite fixing base material for processing 3D printing honeycomb material and preparation method thereof

CN122011520ACN 122011520 ACN122011520 ACN 122011520ACN-122011520-A

Abstract

The invention relates to the field of milling, in particular to a composite holding base material, a preparation method and application thereof. According to the invention, the low-setting agar-gelatin hydrogel with the mass ratio of 9:1-1:1 is applied to the milling field as the composite holding base material for the first time, so that the stable holding and convenient disassembly of the honeycomb material are realized, the problems of high cutter cost, harsh parameters, unreasonable holding mode and poor process universality in the milling process of the conventional 3D printing honeycomb composite material are solved, the problems of difficult disassembly, workpiece damage and residual influence on the performance of the conventional holding mode are solved, a powerful support is provided for the diversified application of the 3D printing honeycomb composite material, and the 3D printing honeycomb composite material has wide industrial popularization value.

Inventors

  • TAO YU
  • LIU JUNBO
  • LONG ZHENHUA
  • FU XUEZHI
  • HU YUXIN
  • ZHAO JIANFENG

Assignees

  • 四川大学
  • 高端航空装备技术创新中心(四川)有限公司

Dates

Publication Date
20260512
Application Date
20260303

Claims (10)

  1. 1. The composite holding substrate for processing the 3D printing honeycomb material is characterized by comprising low-setting agar and gelatin hydrogel in a mass ratio of 9:1-1:1, wherein the melting temperature of the low-setting agar is 60-65 ℃, the setting temperature is about 26-30 ℃, and the melting temperature of the gelatin hydrogel is 28-34 ℃.
  2. 2. The composite holding substrate according to claim 1, wherein the composite holding substrate contains a low-gel agar-gelatin hydrogel in a mass ratio of 9:1 to 4:1.
  3. 3. The method for producing a composite holding substrate according to claim 1 or 2, characterized by comprising: (1) Weighing the low-setting agar and the gelatin hydrogel according to the mass ratio of 9:1-1:1, (2) Heating and melting in 50-100deg.C constant temperature environment, and stirring; Preferably, the temperature of the step (2) is 70-80 ℃.
  4. 4. A pre-holding structure comprising the composite holding substrate of claim 1.
  5. 5. The pre-holding structure according to claim 4, wherein the pre-holding structure further comprises a honeycomb material, more preferably the honeycomb material is selected from the group consisting of aramid paper honeycomb, fiberglass honeycomb, polyaryletherketone wave-absorbing honeycomb composite material and fiber reinforced composite material honeycomb.
  6. 6. The pre-holding structure according to claim 4 or 5, wherein the thickness of the composite holding substrate in the pre-holding structure is 3 mm-10 mm.
  7. 7. A method of pre-holding, comprising: (1) Smoothly placing the honeycomb material of claim 5 on the composite holding substrate of claim 1, gently pressing to fit it completely, (2) Standing at normal temperature to finish solidification; preferably, the time of standing in the step (2) is 30 min-60 min.
  8. 8. A honeycomb material milling method based on the composite holding substrate of claim 1 or 2, comprising: (1) Smoothly placing the honeycomb material in claim 5 on the composite holding base material in claim 1, lightly pressing to completely attach the honeycomb material, and standing at normal temperature to prepare a pre-holding structure; (2) Uniformly coating AB glue on the surface of a machine tool workbench to form an adhesive bottom layer; (3) Smoothly placing the pre-holding structure on the bonding bottom layer, lightly pressing to ensure that the bottom of the pre-holding structure is completely attached to the bonding bottom layer, and standing and solidifying at normal temperature to form a processing structure; (4) Milling the processing structure in the step (3); preferably, the AB glue coating thickness is 0.1 mm-0.2 mm, and the standing time is 10 min-60 min.
  9. 9. The method according to claim 8, wherein the milling parameters include a spindle rotation speed of 5000-15000 rpm, a feed speed of 600-1400 mm/min and a cutting depth of 3 mm-5 mm, preferably the milling parameters spindle rotation speed of 7000 rpm, feed speed of 600 mm/min and cutting depth of 5mm, more preferably the milling tool is a 6mm end mill.
  10. 10. A method of disassembling a milled honeycomb material according to claim 8 or 9, comprising: (1) Soaking the processing structure in hot water with the temperature of 50-100 ℃ for more than 2 min ℃ to soften the composite fixed base material, and taking down the pre-fixed structure; (2) Placing the pre-holding structure in boiling water at 100 ℃ to remove the composite holding substrate; preferably, the processing structure is placed in hot water at 70 ℃ for 2-5 min times.

Description

Composite fixing base material for processing 3D printing honeycomb material and preparation method thereof Technical Field The invention relates to the field of milling, in particular to a composite holding base material, a preparation method and application thereof. Background The 3D printing honeycomb composite material is a thin-wall porous light structural material, and the porosity can reach more than 90%. The material has the characteristics of light weight, high specific strength, impact resistance, corrosion resistance, high temperature resistance, fatigue resistance and the like, has dual functions of structural bearing and electromagnetic stealth, and is widely applied to manufacturing high-performance energy-absorbing structural components in the fields of aerospace, automobiles and national defense. In the post-treatment link of the 3D printing honeycomb composite material, milling processing is a key process for realizing the precise forming of parts. In the milling process, effective and stable holding of the workpiece is a precondition for ensuring the processing quality. Currently, the main scheme is to adopt a disc combined milling cutter and a mechanical clamping or single adhesive holding mode aiming at milling processing of honeycomb materials in the fields of industrial production and scientific research. However, the traditional disc combined milling cutter has large diameter and high cutter preparation and maintenance cost. The cutter is a special cutter, and is usually only suitable for milling of a honeycomb material, but cannot be compatible with conventional cutters for processing other alloys and composite materials in industrial production, so that the cutter stock cost and the replacement and debugging cost of enterprises are increased. The existing mechanical clamping or single adhesive holding mode has the obvious defects that when the mechanical clamping is adopted, the honeycomb material thin wall is easy to deform, the contact area is small, the holding force is insufficient, workpiece displacement, vibration, burrs, tearing and the like are easy to occur in the processing process, when the single AB adhesive is adopted for holding, the workpiece is difficult to take off after processing, the honeycomb wall is easy to damage, and the adhesive residues can influence the performance of the workpiece, although the adhesive strength is high. In addition, for common honeycomb materials such as Nomex honeycomb and Peak honeycomb, in order to avoid machining damage and ensure machining quality, a combination of machining parameters with high rotation speed, high feeding and small cutting depth is generally adopted in the industry at present, and although the machining damage can be reduced to a certain extent, the small cutting depth can cause the increase of machining times and the great reduction of cutting efficiency. Meanwhile, the high rotating speed and the high feeding can lead the energy consumption of the machine tool to rise, a large amount of cutting heat is generated, the thermoplastic deformation of the honeycomb material is easy to be caused, and the dimensional stability of the part is influenced. In addition, the existing empirical models of the milling process of honeycomb materials are mostly only applicable to single honeycomb materials selected by cutting experiments. When processing honeycomb composite materials with different materials, different types and different lattice structures, the original experience model is not applicable any more, a large number of cutting experiments need to be repeatedly carried out to search parameters, and the technical popularization difficulty is high. Along with the continuous improvement of the requirements of the aerospace field on the dimensional precision and the assembly precision of the honeycomb structural member, the limitation of the conventional milling scheme is gradually highlighted, and particularly in the workpiece fixing link, the conventional method is difficult to meet the requirements of Jiang Guchi force and convenient disassembly, and the industry is in urgent need of a milling process which is suitable for industrial universal tools and is reliable in fixing. Disclosure of Invention The invention provides a precise milling method based on a low-setting agar and gelatin hydrogel composite holding mode, which aims to solve the problems of high cutter cost, harsh parameters, unreasonable holding mode and poor process universality in the conventional milling of 3D printing honeycomb composite materials. By optimizing the holding process and milling parameters, the contact area of the honeycomb material and a machine tool workbench is increased, the holding force is improved, meanwhile, the workpiece is convenient and lossless to detach, the optimal processing parameters are determined by combining partition processing, and the precision processing requirement of the aerospace field on the high-performance