Application of fused deposition modeling 3D printing in copying shape checker of automotive air conditioning connecting pipe

doi:10.19491/j.issn.1001-9278.2025.02.008

Abstract

Abstract:

In this paper， a connecting pipe between evaporator and compressor in a certain type of automobile air conditioning system was selected as a design object， and the SolidWorks software was used to design the air conditioning connecting pipe copying shape checker. The structural characteristics of the copying shape checker were optimized for slicing， and the variable layer height slicing scheme of base plate （0.1 mm layer height）+pedestal （0.3 mm layer height） was adopted. The experimental results indicated that the 0.1 mm+0.3 mm variable layer height slicing scheme had a higher forming accuracy than the 0.1⁃， 0.2⁃ and 0.3⁃mm⁃fixed layer height slicing schemes. Compared to the 0.1⁃， 0.2⁃mm⁃fixed layer height slicing solutions， 0.1 mm+0.3 mm variable layer height slicing solution has less weight for the checker and higher printing efficiency. The 0.1 mm+0.3 mm variable layer height slicing solution was selected as an optimal solution， and the manufacturing practice of air conditioner connecting pipe copying shape checker was carried out using poly（lactic acid） filament as a raw material on an industrial grade fused deposition modeling 3D printer. The checker exhibited the characteristics of high precision， low cost， high efficiency， and light weight.

Key words: fused deposition modeling, 3D printing, automotive air conditioning, connecting pipe, copying shape checker

CLC Number:

TQ320.6

WANG Chen, HE Qi, LI Jingyao. Application of fused deposition modeling 3D printing in copying shape checker of automotive air conditioning connecting pipe[J]. China Plastics, 2025, 39(2): 40-44.

Figures/Tables 9

Fig.1. Schematic diagram of the air conditioning connecting pipe

Fig.2. 3D Model design of the copying shape checker

Fig.3. Variable layer height slicing scheme

Fig.4. Schematic diagram of the positioning points

Fig.5. Comparison of the forming accuracy

Fig.6. Comparison of the checker weight

Fig.7. Comparison of the printing time

参数	热床温度/°C	填充率/%	打印速度/mm·s^-1	挤出宽度/mm	底层、顶层厚度/mm	壁厚/mm	挤出倍率/%
数值	60	10	60	0.4	1.2	1.2	100

Tab.1. Slicing parameter setting

Fig.8. Copying shape checker

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