SU698825A1 - Method of making vehicle body master-model - Google Patents

Description

one

The invention relates to the field of transport engineering, in particular, artomabio-engineering.

A known method of manufacturing mastercases of passenger car bodies with a one-piece frame and removable templates imitating the theoretical surfaces of body parts, including the installation of a master layout on the basic tooling elements, measurements on matching noBepxHocTJJM with controlled equipment, trimming the equipment dimensions to the required values, attachment of removable parts to the required values, detachment of removable elements with controllable equipment, fine tuning of the equipment to the required values, attachment of removable elements to the required values, attachment of removable elements to the required values, detachment of removable accessories with controlled equipment, fine tuning of the equipment dimensions to the required values, attachment of removable elements to the required values, detachment of removable elements with the controlled equipment, fine tuning of the equipment dimensions to the required values, attachment of removable elements to the required values, detachment of removable parts with removable equipment and checking clearances l Oyako, a well-known method requires high precision machining of the base surfaces of the frame and removable templates, which leads to high labor-intensive awn making.

The closest technical solution to izofethenia is a method of making a master-layout of a car body consisting of a frame and removable patterns that mimic the theoretical surfaces of body parts, including making a frame having base surfaces, making removable templates and installing them on the frame using fixers 2 ..

The disadvantages of this method are also the need for high precision machining of the base surfaces of the frame and curved patterns, a very high dimensional tolerance (more than 1 mm mm tolerance, t), high cost and laboriousness of manufacturing.

The aim of the project is to reduce the labor intensity, time and cost of manufacturing the mast-layout and increase the accuracy

5 of its assembly.

This goal is achieved by treating the base surfaces of the frame in free sizes, measuring the coordinates of four arbitrarily selected points of each base surface of the frame, locking & l on the interface of the detachable template with the corresponding base surface of the frame fixing elements, then turning out the removable template on the frame to match the specified points of the frame with the corresponding points of the pattern.

FIG. 1 shows the installation of the template on the frame; in fig. 2 - removable template; in fig. 3 - the layout of the template and the frame before pouring the process window with epoxy resin; in fig. 4 elements of the master piece after filling the process window.

The frame 1 of the master layout, made on the base surfaces of free sizes, is assembled with elements 2, which build the floor of the body and are mounted on technological racks 3, imitating the basic elements of the main conductor. Technological rack 3 mounted on the control plate 4.

In the treated areas 5

The base surface of the frame is measured using the coordinate measurement machine and the coordinates of four arbitrary points a, b, c, g are obtained. For example, the following coordinate values are obtained (see Table No. 1).

Table 1

Claims (1)

On the interface of the removable template 6, at the points a, b, c, and d, the coordinates of which in the XO Z planes are equal to the coordinates and the dimensions of the a, b, c, and g frames (see Table 2), install clamps 7, the position of the vertices which are adjusted according to the value of the third coordinate Y of the corresponding frame points. Table 2 UIE, OO-O2OO, O +1000.00 +1200.0 + 1OOO, OO + 1OO, OO + 150, OO +100.00 To install clamps 7, the removable template 6 is applied to the negative of this template, which has an installation base. At the same time, the template 6 is pressed against the frame in the direction of the Y axis and is exposed along the axes X and Z. at the same time, the top of the retainer installed at the point a of the removable template coincides with the point a of the frame. the apex of the fixer is at the point b - with the point b and so on. Thus, the exact position of the template according to the coordinate Y is automatically ensured. After this, formwork 9 is created around the process window 8, and window 8 is filled with epoxy resin, having preliminarily smeared the base surfaces of the frame. After hardening of the epoxy resin, the fixing assembly 1O, consisting of elements 11, 12, 13, is connected to the template 6. Using the described method of manufacturing master layouts makes it possible to reduce the cost of master layouts by 30% -40%. reduce the labor intensity of making skeletons of master layouts. The length of the process of making master layouts is reduced by 15-25%, which plays an important role during the pre-production period. The invention The method of manufacturing a master-layout of the vehicle body, including the manufacture of a frame having base surfaces, made of removable templates and their installation on the frame