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Padding for fixing system with state memory and applied technical procedure

An installation system and memory technology, applied in positioning devices, manufacturing tools, metal processing equipment, etc., can solve the problems of affecting the memory accuracy of fixtures, poor fluidity, affecting the bonding force of fillers and workpieces, etc., to improve the process conversion accuracy, The effect of improving fluidity and good engineering application prospects

Inactive Publication Date: 2003-05-07
DONGHUA UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The alloy contains toxic elements Pb or Cd;
[0005] (2) After the molten filler leaves the heater, its temperature drops rapidly to its melting point within a few seconds, and the fluidity becomes poor, which directly affects the bonding force between the filler and the workpiece, and the fixture and the filler;
[0006] (3) The condensation and shrinkage of filler injected into the fixture will affect the memory accuracy of the fixture to the original state of the workpiece

Method used

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  • Padding for fixing system with state memory and applied technical procedure
  • Padding for fixing system with state memory and applied technical procedure
  • Padding for fixing system with state memory and applied technical procedure

Examples

Experimental program
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Embodiment 7

[0030] Embodiment 7: Sessile blade processing. see figure 2 and Figure 4 .

[0031] The maximum and minimum dimensions (mm) of the length, width and height of workpiece 2 are: length 200, 187, width 90, 76, height 36, 0; the material is aluminum alloy; the size of workpiece 2 is 210*102*50; the installation system The cavity size is 220*110*40; the composition ratio of filler 4 is Bi:Sn:Cu=49.75%WT:49.75%WT:0.5%WT≈50%WT:50%WT:0.5%WT. The application process of the filler: put the workpiece 2 into the positioning box 1 and make full contact with the positioning element 3 and pre-tighten; preheat the installation system to 125, heat the filler from 4 to 180°C; inject the molten filler from 4 to H 1 , the bottom of the positioning box 1, that is, the thickness h of the filler in the error-sensitive direction 1 ≤10mm; install the positioning box 1 on the machine tool; mechanically process the convex surface of the blade to meet the requirements of the drawing; close the uppe...

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Abstract

A filler for the state-memory installation system contains Bi (15-60 wt.%) Sn (40-85 wt.%), and Cu (0.5 wt.%). It is applied through determining the thickness of filler in error sensitive direction, preheating the installation system, holding the temp for 5-10 min, heating filler while stirring for smelting it, and pressure casting. Its advantages are high flowability and flow speed, high adhesion, and high memory precision.

Description

technical field [0001] The invention relates to a filler used in a state memory installation system and an application process thereof, belonging to the technical field of mechanical manufacturing and application of low-melting point alloys. Background technique [0002] Before mechanically manufacturing low-rigidity parts with irregular geometric shapes, parts based on ceramics, crystals, etc. . In the background art, low melting point alloys are the most widely used phase change substances. In the U.S. Patent (US 5,947,662) "Clamping System for Processing Thin-Walled Workpieces", Becrer et al. used lead (Pb) or zinc (Zn) as the filler of the above-mentioned fixtures, which solved the problem of irregular low-rigidity parts such as steam turbine blades in the machine. Clamping problems in machining. Pb is a toxic element. Zn-based alloys have the advantages of high strength, good cutting process, and good fluidity during hot melting, but their melti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q3/08C22C12/00C22C30/04
Inventor 李蓓智杨建国毛志敏周天经
Owner DONGHUA UNIV
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