GB2193129A

GB2193129A - Method for controlling and monitoring profile re-shaping

Info

Publication number: GB2193129A
Application number: GB08715521A
Authority: GB
Inventors: Ingo Aust; Karl Bartuschka; Jochen Daske
Original assignee: SCHIFFBAU VEB K
Current assignee: SCHIFFBAU VEB K
Priority date: 1986-07-08
Filing date: 1987-07-02
Publication date: 1988-02-03
Anticipated expiration: 2007-07-02
Also published as: DE3711277A1; DD260174A3; GB2193129B; GB8715521D0; NL8700998A

Description

1 GB2193129A 1

SPECIFICATION pie technical means.

An object of the invention is to produce a Method for controlling and monitoring pro- method related to the curve end point of the file re-shaping bent profile for the controlling and monitoring 70 of the profile re-shaping on profile bending The invention finds application especially in machines with step-by-step working progress ship-building profile re-shaping, where profile with a measured value detection at any de bending machines with step-by-step working sired point of the finally bent profile, and an progress are utilised. apparatus for carrying out the method.

Several methods are known in which an in- 75 The method according to the invention pre- ternal measurement system in co-operation sumes that the shape parameter related to the with an external measurement system oriencurve section is presented as an angle be tated to the curve end point detects the tween a straight line defining the curve and a shape parameters related to the bending point freely selectable reference line. Under this con- concerned in each case and compares them 80 dition the solution of the problem according to with the ideal values. The advantage of these the invention provides forming the angle in methods consists in that the measurement ba- cluded by the said straight line and the refer sis is in each case equal to the final bent ence line by totalling of the angle variations profile length. This signifies that close to each which are established on the finally bent pro bending step the entire completed contour is 85 file at every bending step by the feed motion monitored and any inaccuracies which have and the bending. The measured value detec occurred are compensated. tion takes place preferably on the moulding The disadvantages consist in the expense edge of the profile.

which is necessary for the guidance and fixing An especially advantageous representation of the profile end point. 90 of the shape parameter is based upon the According to DE-AS No. 1,552,991 and tangent angle to the reference line, allocated DD-WP No. 225,061, devices are known to the curve end point. By totalling of the which bridge over the entire pivot range of angle variation established at every bending the profile and are mobile according to the step on any desired point of the finally bent maximum profile length. In practical execution 95 profile, the tangent angle results which is this device is presented as a co-ordinate trolnecessary for the ideal- actual comparison in ley with which the selected shape parameter the controlling and monitoring of the profile can be determined at the curve end point in re-shaping.

the re-shaping plane. On the basis of the pro- The apparatus according to the invention is file lengths processed in ship building accordallocated to the delivery side of the profile ing to the stated method for the control of bending machine. It consists of a leg of stable the profile re-shaping, this device requires direction movable in the re- shaping plane, considerable overall dimensions. According to which has at its free end a vertical pivot bear WP B 21 D/285,072, a device is known ing. On this pivot bearing there is seated a which is arranged on the delivery side of the 105 profile mounting which is clamped on to the profile bending machine. In the case of this profile and thus placed in a position to follow solution the length of the measurement basis the movements of the profile during the bend is reduced and thus the described disadvaning step in the re-shaping plane. The rotation tages of the measurement related to the curve then occurring between the leg and the profile end point are countered. At the same time 110 mounting is detected by an angle-measuring however the monitoring of the overall contour apparatus. This rotation is totalled from bend is reduced to the monitoring of contour sec- ing step to bending step and defines the tions. Thus errors and inaccuracies are no lon- shape parameter applied in each case to the ger compensated, but they indicate new shape curve end point.

deviations when the corresponding profile po- 115 One feature of the apparatus according to int passes the deliveryside base end point of the invention consists in equipping the profile the measurement system. mounting with a guide track on which a A further drawback of this solution consists clamping apparatus, constituting the clamp in the difficulty of realising an unequivocal as- connection between profile mounting and pro sociation of the delivery side base end point 120 file, can be moved linearly by means of a with the bending centre with acceptable tech working cylinder. Due to the fact that the nical expense. This association is however guide track is equipped with a length-measur necessary since the bending values are also ing apparatus the execution of the profile feed allocated in each case to corresponding points motion by defined amounts is possible by the of the contour. 125 apparatus according to the invention.

The useful effect which is achieved on appli- A further feature of the invention consists in cation of the invention in comparison with the providing the profile mounting with a marking already known solutions consists in executing device which in the transference of the profile the measured value detection, related to the mounting into the initial position by the length curve end point of the bent profile, with simmeasuring apparatuses receives signals for 2 GB2193129A 2 setting markings upon the profile. through a vertical pivot bearing with a profile The invention is to be explained in greater mounting (7) which clamps the profile (2) dur detail by reference to an example of embodi- ing the bending step and follows the move ment. ments of the profile (2) in the re-shaping The accompanying drawing shows the dia- 70 plane, while between the leg (5) and the pro grammatic representation of the profile bend- file mounting (7) there is arranged an angle ing machine 1 with the profile 2 to be re- measuring apparatus (6) detecting their rota shaped. A parallelogram linkage 4 is secured tion.

Claims

on the profile bending machine 1 in such a 4. Apparatus according to Claim

3, charac- way that the centre of the leg 5 of stable 75 terised in that the profile mounting (7) is direction always carries out circular moveequipped with a guide track (8) for a clamping 1 ? ments in the re-shaping plane about the abut- device (10) which is linearly displaceable by a ment 3 on the delivery side of the profile working cylinder (11).

bending machine 1. On this leg 5 the angle- 5. Apparatus according to Claims 3 and 4, measuring apparatus 6 and a profile mounting 80 characterised in that the guide track (8) is 7 are centrally arranged in a vertical pivot equipped with a length- measuring apparatus bearing. (12).

The profile mounting 7 comprises a guide 6. Apparatus according to Claim 5, charac track 8 on which a carriage 9 with a clamping terised in that the length- measuring apparatus apparatus 10 is moved linearly to and fro by 85 (12) is formed as signal emitter for a marking means of a working cylinder 11. apparatus (13).

The travel distance of the carriage 9 and. 7. Method for controlling and monitoring the thus the profile feed motion are measured by profile re-shaping on bending machines as a length-measu ring apparatus 12. A marking claimed in Claim 1 substsntially as described apparatus 13 is further arranged on the car- 90 in the example disclosed herein.

riage 9. If with the aid of the clamping appa- 8. An apparatus as claimed in Claim 3 sub- ratus 10 the carriage 9 is firmly connected stantially ss described with reference to the with the profile 2, all pivoting movements exe- accompanying drawings.

cuted by the profile 2 during the feed motion Published 1988 at The Patent Office, State House, 66171 High Holborn, and bending are transmitted by way of the London WC 1 R 4TP. Further copies may be obtained from guide track 8 and thus by way of the profile The Patent Office, Sales Branch, St Mary Cray, Orpington, Kent BR5 3RD.

mounting 7 to the axis of the angle-measuring Printed by Burgess & Son (Abingdon) Ltd. Con. 1/87.

apparatus 6, as angle variation, are detected by measurement and processed for the con trolling and monitoring of the profile re-shap ing.

CLAIMS 1. Method for controlling and monitoring the profile re-shaping on profile bending machines with step-by-step working progress which have available an external measuring system in which the form parameter related to the curve end point is represented as an angle of a "45 straight line defining the curve and of a refer ence line, characterised in that the angle is t ascertained by totalling of the angle variation established and measured during each bending step by feed motion and bending, preferably on the moulding edge of the finally bent pro file (2).
2. Method for cohtrolling and monitoring the profile re-shaping according to Claim 1, char acterised in that the angle of the tangent to the reference line, allocated to the curve end point, is ascertained from the totalling of the angle variation established in every bending step. -
3. Apparatus for controlling and monitoring the profile re-shaping according to the method according to Claims 1 and 2, characterised in that with the exit side of the profile bending machine (1) there is associated a leg (5) of stable direction movable in the re-shaping plane, which is in operative connection