CN105675272A - Detection method for judging whether dynamic characteristic of pendulum parts is good or bad - Google Patents

Abstract

The invention belongs to the technical field of pendulum parts detection, and relates to a detection method for judging whether the dynamic characteristic of pendulum parts is good or bad. According to the technical scheme adopted, an imaging technology is utilized to intercept the shapes of interfaces for fitting analysis, and whether a work piece is qualified or not is judged according to the amount of deformation. Before assembly, high-quality parts can be picked out, and parts with fracture risk or of low stability can be excluded. The survival rate of counting products is improved, and the cost of production is saved.

Description

A kind of detection method judging the pendulum-type excellent summary of part dynamic characteristic

Technical field

This method belongs to pendulum-type piece test technical field, relates to the detection method of a kind of pendulum-type excellent summary of part dynamic characteristic.

Background technology

It is adopt resonance test platform to complete mostly to pendulum-type part dynamic characteristic, by being attached to piezoelectric membrane on micro-structure part or piezoelectric ceramics exciting, the micro structure off-plane movement speed exported in real time with laser doppler vibrometer record again, displacement is converted to analogue signal by computer, and by data collecting card digitized. Eventually through the dynamic physical characteristic calculating pendulum-type parts with microstructure. This detection method is quite time-consuming, is not appropriate for the environment of big production; Final result cannot reflect the stability of part physical characteristic; In this detection process of the test, detection process is completed by a resonance, and this process is to reflect whether pendulum-type part exists fracture hidden danger.

Summary of the invention

Present invention solves the technical problem that for: the detection method of a kind of judgement pendulum-type excellent summary of part dynamic characteristic easy and simple to handle is provided.

The technical scheme is that described detection method comprises the steps:

Step one, is placed on one block of glass plate 4 on the work top of step instrument 1, and levelling flat board so that step instrument camera lens is perpendicular to flat board upper surface, and pendulum-type part 3 is placed on flat board upper surface naturally, ensures that part is parallel with the X-axis of instrument or Y-axis as far as possible;

Step 2, sets Z-direction scanned samples distance;

Step 3, focuses on, focal length is adjusted to part upper surface, and working region 2 is placed on scanning window center;

Step 4, scanned samples, complete the scan sample of part;

Step 5, carries out cross-section analysis to part sample, chooses three equally spaced lines and intercepts cross section, and three lines should be divided equally by part width;

Step 6, the figure that three lines are intercepted is analyzed, and is fitted by the profile of three lines, the standard of the contour line after matching Yu part requirements is compared, it is judged that the excellent summary of part mechanical property.

Present invention have the beneficial effect that pendulum-type part quickly can be carried out excellent slightly classification according to mechanical property by application this method; Apply these data can processing technique be verified and optimization, have higher directiveness to improving later product quality; This method can also be used for product early stage proving test, optimizes structure, improves constantly stability and the reliability of its mechanical property, and then saves production cost.

Accompanying drawing explanation

Fig. 1 is experimental provision schematic diagram;

In figure: 1 is step instrument, 2 is part time job region, and 3 is part, and 4 is glass plate.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is described in further details.

This technical scheme comprises the steps: 1, is placed on the work top of step instrument 1 by one block of glass plate 4, and levelling flat board so that plate level and step instrument camera lens are perpendicular to flat board upper surface. Pendulum-type part 3 back side (removing the opposing face of material) upwards, is placed on flat board upper surface naturally, ensures that part is parallel with the X-axis of instrument or Y-axis as far as possible.

2, setting Z-direction scanned samples distance, the scanning distance of setting should be greater than part thickness.

3, focus on, focal length is adjusted to part upper surface, and working region is placed on scanning window center.

4, scanned samples, completes the scan sample of part.

5, part sample being carried out cross-section analysis, choose three equally spaced lines and intercept cross section, three lines should be divided equally by part width.

6, the figure that three lines are intercepted is analyzed, and is fitted by the profile of three lines, the standard of the contour line after matching Yu part requirements is compared, it is judged that the excellent summary of part mechanical property.

Pendulum-type part is in mechanical processing process, and the methods adopting removal material, this method is in the course of processing, and material structure can produce machining stress more. After machining after Stress Release, part will deform. To in substantial amounts of piece test and process of the test, it has been found that defects such as numerous parts ruptures in the course of the work, dynamic characteristic decay, poor stabilities. Finding through research, the deformation that reason is exactly working region causes. This method utilizes optics step instrument exactly, scans part time job area data sample, and sample is intercepted some cross sections (at least 3), and matching becomes surface profile. Part is divided into three classes by the scope according to variable quantity t: A class, 0um < t < 0.5um; B class, 0.5um < t < 1um; C class, 1um < t. is little on the impact of dynamic property through lot of experiments checking shape of A class part deformation in this three classes part; If more sharp-pointed shape occurs in B class part, reducing the stability of pendulum-type part dynamic characteristic, other deformed shape is little on the impact of part performance; The deformation of any shape of C class part all can have influence on the stable performance of part, and more sharp-pointed deformed shape even can make part rupture in the course of the work.

Claims (1)

1. judge a detection method for the pendulum-type excellent summary of part dynamic characteristic, it is characterized by: described detection method comprises the steps:

Step one, one piece of glass plate (4) is placed on the work top of step instrument (1), and levelling flat board, step instrument camera lens is made to be perpendicular to flat board upper surface, pendulum-type part (3) is placed on flat board upper surface naturally, ensures that part is parallel with the X-axis of instrument or Y-axis as far as possible;

Step 2, sets Z-direction scanned samples distance;

Step 3, focuses on, focal length is adjusted to part upper surface, and working region (2) are placed on scanning window center;

Step 4, scanned samples, complete the scan sample of part;

Step 5, carries out cross-section analysis to part sample, at least chooses three equally spaced lines and intercepts cross section, and selected cross section should be divided equally by part width;

Step 6, the figure that three lines are intercepted is analyzed, and is fitted by the profile of three lines, the standard of the contour line after matching Yu part requirements is compared, it is judged that the excellent summary of part mechanical property.