SU1253748A1 - Method of measuring billet length cut in flying pipe-cutting machine - Google Patents

Description

one

SUBMISSION IS RELATED TO THE PROCESSING PRODUCTION OF THE METAL INDUSTRIAL PREDENTS AND CAN BE USED. used at cutting dvizhen; their pipes to dimensional lengths, for example, in the lines of continuous electric pipe welding mills,

The purpose of the invention is to improve the accuracy of measuring the length of the workpiece, cut by a volatile pipe.

cutting machine.

Fig. 1 shows a block diagram of a device by means of which a method is used to measure the length of a workpiece cut by a flying pipe machine; pas figs. 2 shows time diagrams of the device operation; The device contains a pulse roller meter 1 of the tube length installed in front of the machine as the tube moves, position sensor 2 of the marking mark - the base section 3 formed by an opaque plate rigidly mounted on the movable carriage 4 of the machine and giving the length t The sensor 2 is installed in the cutting area of the machine in such a way that the fixing of the beginning and end of the base section with it is performed after the pipe is gripped by the clamping machine. Two coincidence circuits 5 and b, shaper 7 of the signal passing through the indication area of the sensor 2 of the front edge of the marked base area 3, E) the immobilizer 8 of the delayed signal, counters 9 and 10, arithmest device 11, and a blocking signal The progress of the machine forward from the control circuit of the machine,

 The device works as follows.

After acceleration of the carriage 4 and the capture of the pipe clamping mechanism of the machine speed of the pipe and the carriage are the same. When the base section reaches the sensor 2 (for example, a photo sensor with an illuminator), the latter generates a signal (Fig. 2a), the duration of which is proportional to the passage time in the -zone of the sensor 2 of the base section 3, length t, and the meter counts. During this time, the number of pulses n (fig. 26) is proportional to the amount of movement of the pipe. Shaper 7 generates (Fig. 2c) prokhozkdeni signals through the indication zone of the front sensor .kra tagged

is 20 ,,

537D8i

The base section 3 and the delayed signal of the driver 8 (F1 (g, 2g) sets to zero the counters 9 and 10, and the counter 10

5 between two adjacent signals of the imager 8 has the number of pulses N (FIG. 2d), proportional to the size of the cut off workpiece. This is due to the fact that

10 the carriage of the machine through the same point of space on the section of the cut in two adjacent cutting cycles continuous pipe moves by an amount equal to the length of the cut workpiece.

The arithmetic unit 11 signal shaper 7 implements the calculated length of the cut pipe by the expression

Ij

.

--N,

where i- is the length of the base section; p - the contents of the counter 9; N - the contents of the counter 10.

Blocked signal The machine advance from the control circuit of the machine, brought up to the inputs of the coincidence circuits 5 and 6, serves to eliminate the false alarms of the sensor 2 during the return movement of the machine carriage after it disengages from the pipe.

The correction correction is determined and entered during the current measurement and the process of its determination is not associated with the specified length value and the change in the mode of movement of the pipe,

Primer p. For a zone of guaranteed adhesion of 1500-2000 mm, the length of the base section (length of the shunt) must not exceed 1500 mm (the lower limit value is limited by the required accuracy) over the existing pipe mix (the lower limit value is limited by the required accuracy)

When setting the Z of the base section of 1400 mm from the roller length meter in the specifically considered cutting cycle, we block the passage of the base section through the display point (sensor) and recorded the number of pulses of length n 4200 ..

For the period of time between two passes of the beginning of the base section, N 20165 length pulses have arrived from the roller meter through the adjacent (mentioned and following) cutting cycles.

31

The cut off (from the second of the adjacent cycles under consideration) calculated from this data, the length L was

1ДОО 20165 ,, 22 22 ™ Control measurements of the cut pipes (in the range of specified lengths of 6-10 m) showed that the error

Fi.G

Editor T. Parfenova

FIG. 2

Compiled by V. Shebalkin

Tehred M. Khodanych Proofreader A. Obruchar

Order 4666/16

Circulation 1001

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

2537484

determining L in this way does not exceed i2 mm.

Compared with the base object, which is taken as a prototype, 5 the use of the invention improves the accuracy of measuring the length of the workpiece cut by a flying pipe cutter.

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Claims (2)

1. METHOD FOR MEASURING A LENGTH OF CUTTER, CUTTED ON A VOLATILE PIPE CUTTING MACHINE, including measuring the length under a cut using a pulsed roller meter, characterized in that, in order to increase accuracy, the appearance of a mark printed on the carriage is fixed in one fixed point in the cutting zone of the machine. the machine, with the joint movement of the carriage with the cut pipe, and the measurement of the length of the cut workpiece for each successive cut cycle begins at the moment the mark is fixed when the carriage with the cut pipe is moved to the previous center and finish cutting the adhesive when it engages in a given cycle, 2. The method according to p. 1, characterized in that the label mark the portion of the base length and at the same time carry out a control measurement, fixing the number of length pulses calculated at the moment of fixing the end of the base portion, while the length of the cut workpiece is determined by the expression L = --- 'N, P. where 2 is the length of the base area; η is the number of length pulses recorded during the movement of the base section of the carriage through the control point; N is the number of length pulses calculated for the period between the moments of the beginning of fixation. · The base section of the carriage when it moves with the pipe in the previous and given cutting cycles. No. * SL WITH m Jefe 00 1 12