Tiny diameter jump 2018 - meter design
09 -
23 Wang Yuhu (
Hanzhong eye instrument co. , LTD. )
In the field of mechanical processing, testing parts alignment is the norm, the deflection of the size of a regular parts usually use instrument to determine the detection method of radial runout of alignment, and microminiature parts alignment special detecting instrument is rare, especially on the market is difficult to see the commercialization of chinese-made goods.
In order to meet the requirements of this unit, designed a convenient and practical in the tiny diameter meter.
A diameter, the structure design of the micro jumped instrument structure design as shown in figure 1, is mainly composed of base, top, accessory parts, bracket parts and indicator, etc.
Stent components is made up of two screw will be swinging rod, connecting rod and clamp connection joint body into two activities, each joint is installed two friction plate and a cap nut M5, concrete is shown in figure 2.
After stent parts clamping indicator, indicator measuring head in workpiece radial plane has the universal function.
In daily use to adjust the tool as far as possible need not, unarmed can easily adjust the working position of indicator, joint friction resistance is usually set at two activities (
10 ~ 18)
N/cm, and then back cover nut M5, two kinds of screw and the connecting rod as a not relative rotation of whole, swinging rod and friction between the friction plate holder can stress rotation.
Gripper joint frictional resistance of the calibration indicator.
Annex parts as shown in figure 3, install V block locating rod end, used to test the radial based on workpiece axis falcon to beat;
At the other end can change the mandrel, used to test the radial hole at the center of the artifacts as a benchmark, round beating, size d and d vary according to the measured workpiece, specifically tailored configuration.
Second, the key parts design points (
1)
The base 2 & phi;
6 mm hole accuracy is the most important technical requirements, jump diameter instrument zero alignment requirements.
02 mm, surface roughness Ra = 0.
8 mm, aperture piece consistency 0.
002mm。
（
2)
Top fixed rod are usually used in pairs, attachment, cylindrical dimensions matching pairs and the base hole to 2 & phi;
6 mm hole of fit clearance & le;
0.
005mm。
（
3)
V block is also used in pairs, materials for hardening high speed steel, V groove surface grinding.
V block in pairs of V groove and & phi;
3 mm hole contour & le;
0.
01 mm, other dimensions as shown in figure 4.
But sometimes to detect cylindrical workpiece two benchmark ranging in size, v-shaped groove and & phi;
The distance of 3 mm hole size ranging from high will be specially designed.
Three, use a method according to the requirements of the workpiece to be measured datum, optional routine standard & 60 deg;
Top sides, multi-function accessories and make special accessories, good location clamping or components.
Loosen stents locking device 9, 7 parts along the rocker shaft axial movement, let measured workpiece position indicator measuring the first five in the center of the axial location, tighten lock screw stent, handheld indicator and moderate adjustment, at the center of the measuring head surface contact with the workpiece tested parts, to make the indicator pointer clockwise (number of calibration, fingers touch work-piece is more than a week, big indicator pointer swing of the largest number of calibration are artifacts of radial circular runout values or coaxial degree size.
If measurement is cut on the top of the small gear, the gears each tooth position by measuring, big pointer in tooth position of maximum and minimum scale value is the difference between the gear radial round beating value.
If measurement is not cut on the top of the small gear, the indicator will be using a dedicated pitch diameter measuring head, in each gear tooth pitch diameter position by gear measurement, position the pointer in the alveolar diameter of the maximum and minimum scale value is the difference between the gear radial round beating value.
If the measure is the sector gear, big pointer in fan round one of the biggest scale value and minimum scale value is the difference between the sector gear radial round beating value.
Conclusion basic design can be applied to all the rules of rotors of microminiature parts radial circular runout measurement, and no multifarious adjustment process, base design also have commonly used measuring head and exchangeable mandrel suspension point 10, fixed pole placement hole 2 on top or attachment, use and storage convenient not easily lost.
The diameter jump instrument in this unit is widely used in turning parts of coaxial degree test, the gear hob tooth ring to beat detection and finished parts alignment inspection, meet the needs of the daily production, its application state as shown in figure 5 ~ figure 8.
Shows that: the diameter meter measure the alignment of parts or radial round beating value, contains the parts out of roundness error of ingredients, usually microminiature parts of roundness error is very small, generally ignored in actual measurement,
This design has applied for national patent for utility model, accepts the number: 201621109213.
9)
。
Source: the metal processing (
Cold working)
'2017 (
15)
