CN2082399U

CN2082399U - Multi-function pneumatic instrument

Info

Publication number: CN2082399U
Application number: CN 90221836
Authority: CN
Inventors: 冀清发
Original assignee: JILIN POLYTECHNIC COLLEGE
Current assignee: JILIN POLYTECHNIC COLLEGE
Priority date: 1990-10-08
Filing date: 1990-10-08
Publication date: 1991-08-07

Abstract

The utility model discloses a multi-function pneumatic instrument, which can measure the dimensional error, form error, relative position error of components. The utility model is formed by the mutual connection of a float display device (22), an air-actuated differential (30), a gauge head (16), etc. Via an air pipe. Parts with various errors can be measured by adopting different gauge heads of the utility model. The utility model has high measuring precision, can directly display the number value of the error, and can implement the active measurement on production lines.

Description

Multi-function pneumatic instrument

The utility model belongs to surveying instrument, is a kind of air-gauge of measuring the part and assembly form and position tolerance.

Though pneumatic gauging has obtained using more widely aborning, air-gauges such as present float type, water column type, film mercury pillar only are suitable for shape error, the scale error of measuring part.And measure mutual position error is very difficult, needs many amount instrument to realize.As Fig. 1 is the synoptic diagram of measuring the part inner cone with two float type air-gauges.Pressure stability and filtered pressurized air enter two air-gauges (1), (3), and when taper hole (4) zero draft error, two amount instrument floats (2) are contour; When taper error, then two amount instrument floats (2) have difference △ h, by calibration, can determine the taper error of taper hole (4).The shortcoming of this method is: 1, need with two duplicate air-gauges of parameter, this is to be difficult to realize; 2, measuring accuracy is low, and the active that can't be implemented on the production line is measured.

The purpose of this utility model provides a kind of multi-functional air-gauge.It both can measure zero, the scale error of parts, shape error, can measure mutual position error again, as the depth of parallelism, verticality, right alignment, hole centre distance equal error.

The utility model is to be interconnected to constitute (referring to Fig. 2, Fig. 3, Fig. 4) by float display (22), pneumatic differentiator (30), throttling valve (20), gauge head (16) by tracheae.Wherein, float display (22), throttling valve (20), gauge head (16) and tracheae all are existing parts.Pneumatic differentiator (30) can be formed by the existing pneumatic amplifier transformation of the way; Also processing and manufacturing forms voluntarily.The structure of pneumatic differentiator mainly is by adjusting valve formations such as (9) in bolt (5), housing (6), push rod (7), admission piece (14), outlet nozzle (13), bellows (8), the outer valve (10) of bellows, the bellows as shown in Figure 3.Wherein, the outer valve (10) of bellows is connected with the exocoel (12) of bellows (8), and valve (9) is connected with the inner chamber (11) of bellows (8) in the bellows.The inside and outside valve of bellows (9) (10) is connected with gauge head (16) by tracheae (17) respectively.Promptly can have the throttle orifice (15) that communicates with the pore of the inside and outside valve of bellows (9) (10) on the inside and outside valve of bellows (9) (10), this throttle orifice (15) is connected with gauge head (16) by tracheae (17).The air vent aperture of the inside and outside valve of bellows (9) (10) is identical.

The course of work of the present utility model following (referring to Fig. 2, Fig. 4): when pneumatic switch (25) points to A, can survey scale error and shape error, when pointing to B, but gaging hole centre distance, mutual position errors such as tapering, verticality.When switch (25) points to B, pressurized air is divided into two-way behind reduction valve, water-separating gas filter: the one tunnel enters float display (22), enter the admission piece (14) of pneumatic differentiator (30) through the gas outlet (31) of float display (22), discharge by outlet nozzle (13) again.Another road pressurized air enters the bellows inner chamber (11) and the exocoel (12) of pneumatic differentiator (30) respectively by throttling valve (20), discharges from the valve of gauge head (16) by pipeline (17) simultaneously.Because the centre distance error difference of tested part, during measurement, gauge head (16) valve air capacity changes, and makes the inside and outside chamber of bellows (11) (12) produce pressure P respectively ₀₁, P ₀₂The result produces pressure differential △ P ₀=| P ₀₁-P ₀₂|, bellows (8) is out of shape thereupon, drive push rod (7) displacement, exhaust nozzle (13) external series gap S is changed, air capacity also changes thereupon, and the height h of float (23) also changes thereupon, can measure mutual position error.

Characteristics of the present utility model are:

But 1 measurement size error, shape error, mutual position error.

2, owing to use differential attachment, pressurized air changes in 0～1.5MPa not influence of measurement result;

3, the tested part riding position does not have influence to measurement result.

4, when measuring mutual position error, size changes in allowed band, and measurement result is not had influence;

5, measuring speed is fast, float stabilization time＜0.3 second, and repetition rate 98%, per minute can be surveyed workpiece 35-40 spare, and the active that can be implemented on the production line is measured, and configurable gas-electric converter, realizes that numeral shows.

Fig. 1 is the synoptic diagram that existing air-gauge is measured the part tapering;

Fig. 2 is a schematic diagram of the present utility model;

Fig. 3 is the pneumatic differentiator structural drawing of the utility model;

Fig. 4 is the utility model one-piece construction figure.

The utility model is described in further detail below in conjunction with Fig. 2, Fig. 3, Fig. 4.In pneumatic differentiator (30), float display (22), throttling valve (20), the air power steering switch housings of packing into (28) such as (25).Source of the gas pipe (21) joins with float display (22) and two throttling valve (20) respectively; The gas outlet (31) of float display (22) joins by the admission piece (14) of tracheae (24) (29) and air power steering switch (25) and pneumatic differentiator (30); Two throttling valve (20) join with the inside and outside valve of bellows (9) (10) respectively by tracheae (18) (19), and join by tracheae (17) and gauge head (16); When air power steering switch (25) points to A, directly join with the gauge head (27) of measuring the part internal diameter by tracheae (26).The utility model disposes various gauge heads and gets final product a tractor serves several purposes.The air vent aperture of the inside and outside valve of bellows (9) (10) is answered≤1mm, and desirable pore size is 0.7mm.The aperture of throttle orifice (15) is 0.5-1mm.

Claims

1, a kind of multi-functional air-gauge, it is by float display (22), pneumatic differentiator (30), throttling valve (2), gauge head (16) is interconnected to constitute by tracheae, wherein pneumatic differentiator mainly is by adjusting bolt (5), housing (6), push rod (7), admission piece (14), outlet nozzle (13), bellows (8), the outer valve (10) of bellows, valve (9) constitutes in the bellows, it is characterized in that the outer valve (10) of bellows is connected with the exocoel (12) of bellows (8), valve (9) is connected with the inner chamber (11) of bellows (8) in the bellows, and in the bellows, outer valve (9) (10) is connected with gauge head (16) by tracheae (17) respectively; The aperture of the pore of the inside and outside valve of bellows (9) (10) is identical.

2, according to the described multi-functional air-gauge of claim 1, it is characterized in that the inside and outside valve of said bellows (9) (10) is connected with gauge head (16) by tracheae (17) respectively, be meant on the inside and outside valve of bellows (9) (10) respectively and the throttle orifice (15) that communicates with the pore of the inside and outside valve of bellows (9) (10) arranged that this hole (15) are connected with gauge head (16) by tracheae (17); Throttle orifice (15) diameter 0.5-1mm.

3,, it is characterized in that the aperture≤1mm of the pore of the inside and outside valve of bellows (9) (10) by claim 1,2 described multi-functional air-gauges.