JPS6016345A - Positional aligning method in numerical control working - Google Patents

Abstract

PURPOSE:To dispense with transfer for aligning the position of a work by measuring errors between both coordinate systems after approximately locating the work and incorporating the error value in a program of NC machine, in other words, the conversion of coordinate. CONSTITUTION:In a position aligning method when a NC machine tool is used in a ship-building yard and iron works, related apparatus are constituted from a work 1, a NC machine tool 2 and rails 3 on which the machine tool 2 travels, and the machine tool 2 travels in the direction perpendicular to the surface of the drawing. Assuming this direction be the direction of axis X for example, a working head 2a moves on the machine tool 2 in the direction parallel to the surface of paper, i.e. the direction of axis Y and a television camera is mounted on the working head. The related apparatus has further a control panel 2b, a receiver for the television camera and a reader 5 for reading transfer distance of the machine tool 2, and the output of the reader 5 is sent to the input of the panel 2b as a coordinate converting numeral. Thus, the transfer for aligning the position of the work can be dispensed with.

Description

DETAILED DESCRIPTION OF THE INVENTION The present method relates to an alignment method when using a numerically controlled machine tool (for example, a gas cutting machine, hereinafter referred to as an NC machine tool) in an assembly factory that handles large structures such as a shipbuilding or steel structure factory.

When using an NC machine tool bay, the machining starting point, that is, the machining origin and direction of the workpiece, that is, the workpiece, is made to coincide with the operation starting point, that is, the operation origin and direction of the NC machine tool. In other words, it is necessary to match both coordinate axes, but in the case of large workpieces as mentioned above, fine movement and positioning of the workpiece to align the coordinates on the actual object requires considerable effort (・requires equipment). Therefore, in the present invention, the error between the two coordinate systems after the approximate positioning of the workpiece is determined by measuring the error value, incorporating the value into the program of the NC controller, and converting the coordinates as described above. This is intended to eliminate the need for movement for positioning the workpiece.For this reason, a television camera is attached to the machining head of the NC machine tool, and an image receiver for this is placed on the operation panel.There is no need to move the workpiece for positioning. Mark the origin and one other place,
Mark these two eye marks on the image receptor. After this 5K, I started the NC machine from its origin, and
Move the NC machine tool origin on the image receiver that moves with the movement of the C machine tool to the marking point on the workpiece, and then
The X-axis of the machine head of a machine tool.

Measure the moving distance in two directions of the Y axis. This means that the deviation between the coordinates of the NC machining/creation and the workpiece has been measured between the machine tool origin and the mark on the workpiece. If the control value of the NC machine tool, that is, the position element of the program, is corrected using the value of this distance, the workpiece coordinates will be converted into the NC machine tool coordinates, and this program will cause the NC machine tool to first set the machining head as the starting point for machining the workpiece. , and from there it will start moving according to the program.

FIG. 1 is a skeleton diagram showing the relationship among various devices for carrying out such a method, and 1 is a workpiece.

2 is the NC machine tool, and 3 is the rail that the machine runs on.

In the case of the figure, the aircraft travels in a direction perpendicular to the plane of the figure, which is, for example, the X-axis direction. 2α is a machining head which moves on the NC machine tool in a direction parallel to the plane of the paper, that is, in the Y-axis direction, and a television camera is mounted on this head.

2El is a control panel of the NC machine tool, 4 is an image receiver of the television camera, and 5 is a moving distance reader of the NC machine tool, the output of which is input to the NC machine tool control panel 2b as a numerical value for coordinate conversion.

The present invention as described above has the advantage that alignment of the workpiece itself with respect to the NC machine tool can be omitted.

[Brief explanation of the drawing]

FIG. 1 is a skeleton diagram showing the relationship of various devices related to this method. 1 Work 2 NC machine tool 3 Same machine rail 4 TV receiver 5 Distance recorder Applicant: Mitsui Engineering & Shipbuilding Co., Ltd. Agent Kawa 1) Shigeo

Claims (1)

[Claims] A television camera is attached to the machining head of a numerically controlled machine tool that travels over the workpiece, and the workpiece has a machining starting point and another one.
Mark each spot with an eye mark. This mark is marked on the television receiver along with the origin of the machine tool, and the machine tool origin on the television receiver, which starts from the origin and moves along with the movement, is the mark. A positioning method in numerically controlled machining, in which the distance in the X-axis and Y-axis directions of the movement is measured, and the coordinate axes of the workpiece of the numerically controlled take of the machine tool are converted to the coordinate axes of the machine tool using these distances.