SU61685A1 - Automatic body turning machine - Google Patents

Description

Automated machines for machining rotating bodies are known, where the transverse feed is automatically set (by means of an appropriate electrical circuit) depending on the difference in size of the reference part being machined.

The proposed automatic machine performs precision machining of bodies of revolution, measuring the diameter of the part during its processing. The measurement is made by measuring heads.

(Fig. 1 shows a mechanical diagram of the measuring part of the machine; Fig. 2, an electrical control circuit.

Between the measuring heads 1 there is a reference part 2 (Fig. 1), according to which other parts must be manufactured with great precision. A template can be placed instead of a reference part. The measuring heads have measuring tips fixed in frames 3 to 4, which are adjusted by means of electric motors 5 in such a way that the distance a between the ends of the knives exactly corresponds to the diameter of the reference part (the knives of this part do not touch). At the same time, the absolutely definite position of frames 3 and 4, connecting heads 1 with measuring heads 6, the purpose of which is to measure the diameter of the part 7 during its processing, will correspond to the whole diameter of part 2.

The measuring heads 6 are different from the heads / in that their knives are not rigidly fixed, but follow the dimensions of the part. If the workpiece 7 in this section has the same size as the reference part 2 in the same section, as a result of measuring the diameter of the measuring heads 6, the arrow of the measuring device 8 (Fig. 2) will stand at zero. If the diameter of the workpiece in the cross section is not equal to the diameter of the reference part, then when you change the position of the arrow, the selsyn 9 idle on the same shaft will change the phase of its

J.- 61085-- 2 output voltages. As a result, one or the other of the thyratron currents 10 will gain the advantage (since the zero output phase is shifted by 90 ° with respect to the anode voltage of the thyratrons), and the electric motor //, whose two secant windings are connected to the thyratrons, will rotate in one direction or another. This motor is connected to the shaft 12, which in turn is connected to the cross feed of the tool (but the longitudinal feed is normal).

If the diameter of the part 7 is larger than the diameter of the part 2, the whole is reduced and the feed in one direction (in the machining direction) is transverse. When the required size (or size plus tolerance) is reached, the tool retracts. Since during this time the longitudinal feed manages to move the caliper to the next one, its not yet machined part part, then the cross feed starts again, and so on.

The scheme can be improved depending on the specific needs of the process, introducing deceleration of the longitudinal feed with very large transverse feeds, ensuring quick removal of the tool when it reaches the specified size, etc. Instead of thyratrons and DC motors in this experiment (Fig. 2) use magnetic amplifiers and asynchronous motors.

The machine can be designed with two devices for rough and precise processing.

Subject matter

An automatic machine for treating rotating bodies, in which the transverse feed is automatically installed by means of an electric circuit depending on the mismatch of the size of the workpiece to the size of the reference part, characterized in that two frames are moved along the reference and the workpiece, respectively longitudinal feed, measuring heads, of which one measures the reference part and serves to automatically install the heads according to the size obtained by air Acting on the servomotor, stopping the frame in the transverse to the detail direction, and the second measures the workpiece piece and serves to control the cross feed with the help of an electrical circuit, the sensor of which is connected to the movable measuring blades of the heads, and the receiver with the cross feed mechanisms.