CN1040941A

CN1040941A - Coordinate-variable controlled flysaw

Info

Publication number: CN1040941A
Application number: CN 88106315
Authority: CN
Inventors: 蔡一坤
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-09-03
Filing date: 1988-09-03
Publication date: 1990-04-04

Abstract

Fly saw and be in the metallurgical industry continuously on cold forming (welded tube, cold-rolled forming section, the tandem rolling shaped steel) production line, section bar is cut into the unit of determining length, the principle that utilization of the present invention is observed and measured in the motion reference coordinate system, all kinds of in the past accumulations that fly to saw various errors in motion process and measuring process have been avoided, make the error of shearing length reach internal and international current techique standard, and reduced manufacturing cost.

Description

Coordinate-variable controlled flysaw

Flying saw is requisite unit during the continuous cold forming of metallurgical industry, particularly steel industry (welded tube, cold-rolled forming section, tandem rolling shaped steel) is produced, and its function is that the section bar with continuous motion is cut into definite length.Because standardization, the standardization requirement in use of these section bars, the finished product length difference should be controlled within the specific limits.The welded tube of Ministry of Metallurgical Industry regulation is provided quality goods or brilliant in the quality standard, and regulation scale tolerance is 6 millimeters; Reach the welded tube of gold standard comprehensively, can raise the price 15%, and can be for export.General international standard is that (+1/4 " promptly+6.35mm) for the BS-1387 standard.Present many manufactories and user are the long tolerance table of scale ± 3mm.

About 600 of domestic existing welded tube unit (not taking into account most of township enterprise).Other quality index of many welded pipe factory products can both reach or near national best or quality award from the ministry standard, only have sizing accuracy not reach.These producers are all in the approach of seeking to improve sizing accuracy; With scientific research institutions or university cooperation,, but all do not see the report of successful example from the multiple channel exploitation.1985 iron and steel industry designing institutees have manufactured and designed hyperbolic by the data of U.S. Blaw-Knok company and have turned swinging and fly saw.(Ministry of Metallurgical Industry prize-winning research and development program element) surpasses the fixed length deviation, and (± 3mm) product surpasses 1/5th, (referring to this product description and trial-production report).Shoudu Iron and Steel Co.'s wire rolling plants units such as (Shahe, Beijing) flies its actual error of cutting off welded tube of saw (using the DDS numerical control system) also more than 10mm from what Japan introduced.

No matter what home or overseas was made accurate sizing flies to saw problem below must solving:

ⅰ. the accurate measurement speed and the length of moving section bar of not stopping transport.

ⅱ. the speed and the haul distance of the saw car that accurate measurement is not stopped transport moving.

ⅲ. in the regular hour, in certain stroke range, the saw car is accelerated to the same with the section bar movement velocity.

IV. it is L ± 3(mm) that section bar is sawed the car move distance relatively

(wherein L is a welded tube fixed length nominal size)

ⅴ. must reach the requirement of (ⅲ) and (IV) exactly at synchronization.

The present invention's (coordinate-variable controlled flysaw) observes in terrestrial reference system, measures and fly to saw and the motion of section bar system, but the reference frame of observation control is fixed on the section bar, suppose that it is that reference frame moves with ⅴ that section bar moves with speed ⅴ.So, section bar has become static.Originally the saw car of unstart still with-ⅴ in motion, as shown in Figure 1.The saw car that catch up with section bar and move at the same rate becomes static.And under this kind state, cut off, as shown in Figure 2.

Therefore above-mentioned complexity fly saw motion and control procedure, become a foolproof problem in new coordinate system: the saw car with-ⅴ motion stops in a certain fixed point, the position deviation that stops the place is less than ± 3mm.Whole specification requirements have so just been reached.Above-mentioned about flying to saw 5 challenges of observing and controlling, just be transformed into such simple question.

It more than is the present invention's's (coordinate-variable controlled flysaw) main design philosophy.

Carry out above-mentioned design philosophy, at first will on section bar, set up a reference frame.This is an one-dimensional coordinate system, so only need set up two reference points; A reference point (with reference to origin of coordinate) O is selected on the end face (3) of section bar direction of advance.Another reference point X is located on the additional mark (4).Additional mark (4) establish following five kinds of modes:

(a) on section bar, fix an attribute block with mechanical means, or sticking lastblock electromagnet.

(b) on section bar, spray bar code with the mode of ink-jet.

(c) on section bar, stamp bar code with the mode of printing.

(d) on section bar, engrave bar code with the chemical reaction mode.

(e) on section bar, engrave bar code with laser.

Discern two reference points of the reference frame of motion accurately and reliably, finish by reading to mark device (5).That reads first reference point (section bar advance square end face (3)) reads that to mark device be a photoelectricity door.When reading end face (3), sends at the photoelectricity door enabled instruction of saw car (7).

Read to mark device (5) and divide following two kinds of situations the identification of additional mark (4):

(ⅰ) additional mark of setting up with mode (a) (4), reading to mark device (5) is a photoelectricity door, send instruction to binding clasp (6) when the photoelectricity door is read additional mark (4) section bar (1) is clamped, instruction is sent to saw blade (2) in the time-delay back, and section bar is cut off.

(ⅱ) with mode (b), (c), (d), (e) additional mark of Jian Liing (4), reading to mark device (5) is laser gun or light pen, sends instruction to binding clasp (6) when reading additional mark (4), and section bar (1) is clamped.Instruction is sent to saw blade (2) in the time-delay back, and section bar is cut off.

Design philosophy according to the present invention compares the experimental result on the simple and crude equipment in the laboratory, its fixed length deviation is 0.9mm.On production line, can reach same sizing accuracy.Thereby reach and surpassed the requirement of the internal and international universal standard.

Though the flying of Japanese import sawed or domestic present newer microcomputer control to fly to saw all be to test the speed as the foundation of speed and length control with roller.Therefore rolling wheel wear, slide or saw car motion and the gap of running part or the error that other errors all can influence the section bar shearing length.Although therefore in the accuracy of manufacture of machine, survey the rate accuracy of rolling, and autocontrol method done very high requirement, final shearing length error does not reach the precision of the phase of giving.

Survey length of the present invention is directly to measure and send in the coordinate system on section bar to cut off instruction, and the error of therefore surveying error, machine movement and the transmission of rolling can not influence final result.Therefore the present invention has not only improved precision, and the cost of machine manufacturing and control is automatically all reduced significantly.

Claims

1, the machine that the shape [1] (welded tube, cold-rolled forming section, tandem rolling shaped steel) of continuous cold forming is cut off (flying saw) is characterized in that:

A. profile length L to be cut measures in (one dimension) reference frame OX of motion.

B. the reference frame of this motion is fixed on the section bar [1] of continuous motion.

C. the initial point O of (one dimension) reference frame is located on the end face [3] of section bar.

D. another reference point X that determines (one dimension) reference frame is located on the additional mark [4].

2, the initial point O of reference frame as claimed in claim 1 discerns with light electric switch (5).

3, additional marking as claimed in claim 1 (4) is an attribute block of installing with mechanical means or with the electromagnet that electromagnetic method sucts, discern this kind mark read mark device (5), be the photoelectricity door.

4, additional marking as claimed in claim 1 (4) is a bar code, and that discerns this kind mark reads that to mark device (5) be light pen or laser gun.

5, set up with ink ejecting method as claim 1 and 4 described bar codes (4).

6, set up with the roll printing method as claim 1 and 4 described bar codes (4).

7, set up with chemical display packing as claim 1 and 4 described bar codes (4).

8, set up with laser means as claim 1 and 4 described bar codes (4).

9,, in coordinate identification initial point O, send the enabled instruction of saw car (7) as described in claim 1 and 2.

10, as claim 1, send indication to binding clasp (6) in the time of 3,4,5,6,7,8 described identification additional marks (4), section bar (1) is clamped.Instruction is sent to saw blade (2) in the time-delay back, and section bar is cut off.