SU1460602A1 - Pneumatic device for tracing linear displacement - Google Patents

Abstract

The invention relates to a measurement technique and can be used to measure linear dimensions and adjust the position of a machining tool. The purpose of the invention is to increase productivity and expand the measurement range by automating the processes / preparing for the measurement and measurement and increasing the clearance with controlled

Description

one

The invention relates to a measurement technique and can be used to measure linear dimensions and adjust the position of the machining tool.

The purpose of the invention is to increase the productivity and the expansion of the measurement range.

Figure 1 shows a device, a general view, a section; figure 2 - section aa in figure 1.

The pneumatic follow-up device for linear measurements contains a housing 1 arranged vertically along the axis of symmetry with locking screws 2 in the upper part, a pneumatic cylinder 3 fastened to the housing, in which a hollow rod 4 is mounted with a piston and a hollow cup 6 with a groove 6 and a hole 7 , Which is a continuation of the rod 4, the lens 8 installed in the lower part of the rod, the protective glass 9, the adjustment mechanism consisting of the housing 10 with a central through hole, a thread 11 on the outer surface, an adjusting ring 1 2, screwed onto the housing 10, expanding bracket 13 with locking screw 14 and spring element 15, the output nozzle

16, mounted on the side of the housing limit screw

17, the end of which comes in

A piston rod 20 and a spring 21 mounted on the lateral surface of the pneumatic cylinder 3 a pneumatic switch 22 are placed in the groove 6 of the cup 5, the pneumatic lock 18 in the control cavity 19, and the piston rod 24 and the spring 25 are throttle-ejector mounted in the control cavity 23 of which a converter 26 placed in the area near the nozzle 1.6 in the groove -27 of the rod 4 and pressed against it by the spring element 15 so that it is fixed on the periphery of the adjustment mechanism, the pneumotummers 28-31 and the choke 32, which together with the nozzle 16 form a control unit mon Euro cylinder 3.

The control cavity 19 of the pneumofixator 18 communicates with the input of the converter 26 and with the pneumo-tumbler 28, the input 33 into the control cavity 23 of the pneumoswitch 22 communicates with the pneumo-tumbler 29, the input 34 of the pneumo-switch communicates with the inter-throttle cavity of the converter 26, the input 35 of the pneumo-switch pneumotuncture 30, and the output pneumatic switch communicates with the cavity under the piston of the pneumatic cylinder 3. The hole in the housing 10 of the alignment mechanism is in communication with pneumotumbler 31.

In the piston piston 24, a channel 36 is connected, communicating with the exit of a pneumatic switch .22 its input is FOR, and a channel 37 communicating the output with an input 35. Inputs 34 and 35 are equipped with threaded bushings 38, by means of which the forces of the springs 25 are adjusted.

Before measuring, adjust the focus of the lens 8, for which an end MejJy of the required thickness Zg and this measure are placed on the workpiece surface (not shown).

ten

20

25

lower the stem 4 until it touches the end face of the converter 26. Then release the screw 14, freeing the bracket 13 by rotating the ring 12, align the focus of the lens 8 with the worked outer surface of the part and fix the converter in this position with the screw 14. Turn on the pneumo-tumbler 31 to deactivate the purge Lens 8.

The device works in the following way.

Turning on the pneumotubactor 28 delivers the compressed gas to the control cavity ig 19 of the pneumofixer 18, which leads to the withdrawal of the piston rod 20 from the hole 7 in the cup 5, and to the input to the converter 26, as a result of which the depression area from the inter-throttle cavity of the converter spreads through the inlet 34 into the pneumatic transducer 22, the piston-piston 24 is lowered and the channel 37 communicates the inlet 35 of the pneumatic switch with its exit and with the cavity of the pneumatic cylinder, into which compressed gas flows through the throttle 32, keeping the rod 4 in the upper position. Then, by turning on the 3D air tumbler, the gas is drained from the cavity of the pneumatic cylinder 3 and under the action of gravity the rod moves down until the gap between the end face of the converter 26 and the workpiece surface becomes equal to the equilibrium working gap Z. At the same time, the pressure in the inter-throttle section of the converter 26 and the cavity communicated with it, the pneumoswitch increases, the piston rod 24 returns to its upper position and the inter throttling cavity through the channel 36 is communicated with the cavity of the cylinder cylinder 3. The device starts work in tracking mode. If the gap between the end face of the transducer 26 and the surface to be machined becomes less than ZQ, the pressure rises in the inter-throttle and pneumatic cylinder, the rod 4 and the transducer fixed on it move upwards to restore a stable gap. When the output of the processed surface from under the Converter 26, in

thirty

35

40

45

50

ten

0

five

ig

0

five

0

five

0

its inter-throttling cavity and a vacuum are created at the inlet 34, the piston-piston 24 is lowered down and the cylinder cavity communicates with the outlet 35. By turning off the pneumotransmitters 30 and 28, the piston rod 4 is returned to the upper position, where it is held by the pneumatic detent 18.

The use of a choke ejector transducer as a measuring nozzle allows the device to be driven as a pneumatic cylinder with one working cavity and to use atmospheric pressure to create a back pressure, which allows extending the measuring range (allowable displacement range of the surface to be treated), pneumoswitch - automate the process of preparing for measurements and the measurement process itself, which improves performance.

Claims (1)

Formula invented and A pneumatic linear tracking device containing a pneumatic cylinder, a pneumatic cylinder control unit with a measuring nozzle fixed on the hollow rod of the pneumatic cylinder, and pneumotummers, characterized by the fact that, in order to increase performance and extend the measuring range, it is equipped with an adjustment mechanism fixed on pneumatic fixing valve and pneumatic switch, - the nozzle is made in the form of a throttle-ejector transducer and is fixed in the lower peripheral part of the adjustment mechanism, which controls pnevmofiksatora cavity communicates with the input transducer, and one of pnevmotumblerov, the control cavity pnevmopereklyuchatel - pnevmotumblerom with another one of the inputs pnevmopereklyuchatel mezhdrosselnoy cavity communicates with the converter, its other input communicates with the third pnevmotumblerom and output pnevmopereklyuchatel communicates with the cavity of the pneumatic cylinder. ; 4-L 31 Fi & .2