DE2004783A1 - Measurement and display of figures for thedi - gap and workpiecein reversing mill - Google Patents

Abstract

Arrangement for indicating the position of the workpiece holder and the roll gap relative to each other during the rolling cycles in a warm reversing mill consists of micro switches actuated by measuring contacts attached to the carrier and the rolls. When the circuits are closed, inductive currents are set up which are fed in a computer with a digital read out window showing the required information derived from measuring the time interval at which the contacts have been closed. To obtain the desired values, changes are then made, either in the speed of rotation of the rolls or the pressure in the workpiece-carrier. These may be effected either by manual operation or automatically through the computer.

Description

"Procedure and device for indicating the position of outhaulers and roll caliber to each other during the rolling cycles for hot pilger mills "Bei the production of steel pipes with the warm pilgrimage process comes from the interaction of downhaul and drum caliber are of essential importance. The optimum in dLeser Respect is given when the speed of the pilgrim rollers and the air pressure in the vanguard are matched so that the passer-by its front end position is precisely fixed Position of the roller caliber has reached.

Deviations can either lead to a decrease in the performance of the rolling mill or in connection with the feed, an overfeeding of the rollers and thus a Overuse with the risk of roll or spindle breakage.

The interaction between the hauler and the reel is still in practice today Left to the helmsman, who by feeling and hearing on C; nind of experience Air pressure and speed changes.

Since this control, which is dependent on the helmsman, is not always a guarantee for the optimum, it is the object of the invention, regardless of experience of the helmsman to create a measuring device that automatically sets the Differen3wege between Vorholer tmd roller angle, so that it is immediately possible to see which measures are taken must be taken hold of by the helmsman.

This object is achieved by a method that is characterized is that the target position of the hauler and drum caliber through a single measuring point is fixed on the hauler and on a roller that has an electrical contact are in connection, their actuation via inductive path takers on the hauler and takes place on a roller depending on the path and the contact is triggered by means of a computing device on the shop windows of a double display device either the "zero position" or the determined time difference between the contact closures in the form of digits has, the latter in a known manner by changing the pressure in the hauler or the roller speed is automatically controlled to zero.

According to the invention, there is a device for carrying out this method provided, which is composed of an electrical distance measuring device for the fetcher, consisting of a screw that rests, for example, on the twist spindle and an induction path taker on the fixed haul-out housing and an electrical one Angle of rotation measuring device with a similar structure for the rollers, attached for example on the journal of the pinion gear; electronically connected to both is one Calculating device and a double display device with shop windows on the control panel in which the measured and displayed values remain visible until the next rolling cycle and are only corrected by the result of the next measurement in such a way that the predetermined optimal operating conditions arise.

It should be noted that with an internal twist spindle Work on the ebetiL'aiis with a rotation angle measuring device is carried out cold.

The accompanying sketch according to FIGS. 1 to 4 represent the known per se Structure of a hauler and the rollers with their drive, in welcli £ 'rn for example arranged measuring devices are visible.

According to Fig. 1 to 4, the system consists of the catcher 1 with a fluid brake 2 and twist spindle 3, pecker housing 4, feed rod 5, pilger rollers 6, pinion gears 9 and symbolically the computing device with double display device 10. The electrical measuring device 7 for the hauler and the electrical measuring device 8 for the reels are essential for the invention.

The measurement sections are transmitted without contact, with the Switching part of the lead closes the electrical contacts in the zero position and wherein a pulse generator is set in action in the arithmetic unit, which in time pulses that are counted in a counter and their number immediately after contact is made with the trailing switching part in the shop window this trailing switching part becomes visible.

Non-contact switches that both when reaching the front End position of the hauler as aur-h be. Reaching the fixed roll caliber setting we'-den are known per se, they are, for example, provided by the company Honeywell manufactured.

A pulse generator is provided in the computing device7 which is more uniform over time Successive impulses when contact is made by the leading contactor in Activity set and turned off when the trailing contactor made contact the pulses counted between the two contacts in the display device of the trailing contactor are shown, while the indicator of the leading Contactor remains in the zero position.

If the setting of the outhaul with the associated caliber setting coincide, they appear on both shop windows because the contact is made at the same time of the double display device, the numbers zero for both "haulers" and for reels.

If the catcher is faster, then it reaches the switching part of the measuring device the electrical contact earlier for the fetcher, so that in the shop window "fetchers" the zero digits appear and also gives a command to the calculator for the caliber rollers, so that from then on the temporal size up to the closing of the contact appears on the angle of rotation measuring device in the "Roller" window and finally stops remain.

For the helmsman this is the job of increasing the speed of the rollers increase or reduce the pressure in the hauler. What action will be taken depends on the permissible performance of the system.

In the opposite case, i.e. if the voyager is too slow, the command is given from the rotation angle measuring device, so that the rolls appear on the shop window Zero digit and in the shop window wVerholer "the time difference is shown, so that the helmsman can overlook exactly which measure he has to take now, the correction being checked and possibly readjusted after a further rolling cycle must be until the zero digits appear in both shop windows.

Thus, through the measure according to the invention, the helmsman is responsible for the interaction removed, so that both the system and the workpiece can no longer be overwhelmed in any way.

In order to provide an exact reference for the regulation of pressure and speed for their sizes corresponds to the displayed difference distance in the table a certain amount of pressure or speed.

- patent claims -

Claims (4)

Claims: 1. Method for displaying the position of the outhaul and roll gauges to each other during the rolling cycles for hot pilger mills, thereby characterized in that the target position of the fetcher and roller caliber by one each The measuring point on the hauler and on the rollers is fixed with an electric Contact are connected, their closure via inductive path takers on the passer-by and takes place on the rollers depending on the path and their contact is triggered by means of a computing device either the zero position or the determined one on the windows of the display unit shows the time difference between the contact closures in the form of digits, whereby the latter in a known manner by changing the pressure in the hauler or the roller speed is also automatically or manually adjusted to the zero value. 2. Device for performing the method according to claim 1, characterized by an electrical distance measuring device (7) for the fetcher (1). consisting of the control part, which rests, for example, on the twist spindle (3), the induction path taker on the stationary Catcher housing (4), an electrical angle measuring device (8) with a similar structure for the rollers (6) attached, for example, to the drive pin of the pinion gear (9), and sst an arithmetic device connected electronically to both with double display (10). 3. Device according to claim 2, characterized by contactless taking electrical path measurements and through two shop windows of the double display device (10), in which the results can be seen digitally. 4. Device according to claim 3, characterized by a double display device, in which the measured and displayed values remain visible until the next rolling cycle and can be corrected by the result of the next measurement.