CS227625B1 - Pluidic welding nozzle position sensor for automatic butt welding - Google Patents

Abstract

The invention belongs to the field of automation, measurement technology and robotics and solves the problem of sensing the position of the welding nozzle when welding butt welds with an electric arc for adaptive control circuits of position servo systems. Its essence lies in the fact that it consists of a pair of fluid planar reflective distance sensors, one of which is operated in the mode of measuring the lateral displacement in the space of the shaped reflection surface, characterized by the leading edge of the welded material, the second in the mode of measuring the axial distance between the sensor mouth and the reflection surface and serves to set the operating point of the first sensor, while both sensors form one monolithic functional block. The invention is shown in the attached drawing in Fig. 5.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid position sensor of a welding nozzle for automatic arc welding of butt welds for adaptive control circuits of positional servo systems.

At present, it is known to use tactile mechanical sensors whose output signal is in the form of displacement or force adaptation. Their principal disadvantage is the need for mechanical contact with welded Road-and the deriving wear stylus, large dimensions that limit manévrovateinosť welding nozzle and creating viacsnímačového system for automatic welding spatial welds difficult adjustment and reproducing reference * _of stand out position, as well as intensive manufacturing ·

These drawbacks are overcome by the fluid position sensor of an automatic welding butt weld position according to the invention, which consists in forming a monolytic functional block consisting of a planar reflective lateral displacement transducer and a fluid planar reflective distance sensor arranged to have the same plane of lateral and lateral symmetry.

The advantages of the fluid position sensor of the welding tube according to the invention are that the need for mechanical contact with the weld material is eliminated and the maneuverability of the welding nozzle is increased.

227 625

In the attached drawing, FIG. 1 is an axonometric view of the basic geometrical arrangement of the working space of a fluid planar reflective distance sensor; FIG. 2 shows its positioning in space when measuring the distance - axial displacement and lateral displacement of the reflection plane; FIG. Fig. 3 is a transmission characteristic of the sensor when measuring the axial distance between the mouth of the sensor and the reflection plane while fully overlapping the mouth; 4 is a transmission characteristic of the sensor when measuring the relative lateral displacement of the sensor mouth, which is operatively connected to the welding nozzle and in the space of the shaped reflection plane, characterized by an edge ΔΒ showing the leading edge of the material to be welded; 5 is a geometric configuration of a nozzle position sensor according to the invention; and FIG. 6 is a diagram of the possibility of assembling the measurement channels for processing the output signals from the position sensor over the adaptive control circuits of the microcontroller position servo systems with the controller! type of two-position relay with insensitivity.

The fluid planar reflective distance sensor 10 in FIG. 1 consists of a pair of supply channels 12, 13, an outlet channel 11 and a cover thatch 14 which encloses the sensor relief working spaces. The transmission characteristic of the fluid planar reflection sensor 10 at lateral displacement of the reflection plane in FIG. 4 is generally characterized by a section j of a continuous variation of the output pressure Py between the two limit values Pzl and Pz2, which in the most unfavorable case has a width H, i.e. a complete overlap or a reveal of both supply channels.

The fluid position sensor of the welding nozzle for the automatic welding of butt welds in FIG. 5 consists of a fluid planar reflection transducer of lateral displacement 10 and a fluid planar reflection transducer of distance 20 arranged so that both have the same plane of longitudinal or transverse symmetry, both sensors forming one monolytic functional block 50 »

The two fluid planar transducers 10 and 20 have the same longitudinal symmetry plane that extends through the axis of the outlet duct 11 and 21, the transverse symmetry planes passing through the center of the height H of the sensor workspace relief parallel and offset by H + S. channels 12, 13, 22 and 23 and cover plates 14, 24 »

It is also possible to arrange a pair of sensors with a common plane of lateral symmetry and parallel planes of longitudinal symmetry, i.e. when positioning the sensor according to FIG. 1, the fluid planar reflective sensors 10 and 20 lie side by side in the x-axis direction, with the edge AB of the reflection plane, now parallel to the y-axis, moving in the -x direction.

Operation of the fluid planar lateral displacement sensor 10 / FIG. 5 / is based on the principle of evaluating the area of its orifice overlapping by the reflection plane bounded by the edge AB, while maintaining a constant distance from the reflection plane for spatially shaped butt welds provides a distance-height control circuit with fluid planar reflective distance sensor 20 that his mouth is permanently full covered with reflective fox »

Measuring channels for two-position evaluation of the output signal from the fluid planar reflection sensors 10 and 20 of FIG. 6, consist of a fluid comparator 30 ' forming a discontinuous regulator of the insensitivity type of a two-position insensitive relay realized by a monostable fluid current amplifier and a pneumatic-electric or pneumatic-hydraulic spreader 40; or reversing the electric or hydraulic actuators of the two-valued re227 625 gulging position of the welding nozzle in the oei direction y. It is also possible to use a discontinuous controller with the characteristic of a three-position insensitive relay, realized by a pair of fluid comparators with subsequent logical evaluation of their output signals.

Claims (1)

- 5- REFERENCES OF THE INVENTION 227 625 Fluid Welding Position Sensor for Automatic Butt Welding. characterized in that they form monols. a static functional block (50) consisting of a fluidized planar reflective transverse transducer (10) and a fluidized planar reflective transducer (20) arranged to have the same planar and transverse symmetric planes.