SU662325A1 - Device for working parts of complicated profile - Google Patents

Description

one

The invention relates to the field of machine tool construction and is intended for grinding non-linear linear bar parts, such as wood.

Single-shaft grinding machines are known for flat grinding of squared parts and curved, mainly concave, surfaces. The horizontal machine consists of a grinding cylinder driven by an electric motor, a bed and a table. The vertical machine has a frame, a vertical spindle with a grinding cylinder and a table. Feed in dry machines; manual feed 1.

Known grinding machines provide machining of either flat, either convex, or concave surfaces of the parts, and therefore, the grinding of bent block parts is performed sequentially on different machines.

A device for processing complex profile parts, such as turbine blades, is known, in which the processing is carried out with two opposed abrasive tools installed together with a drive for their rotation on the rotary beam. The rockers carry copiers, which interact with the template; clamping copy rollers to

the dry pattern is indicated by the elastic element (weights) 2.

The processing of curved block parts on such a device requires the installation of a template corresponding to its profile of the workpiece, which in a number of cases, for example, when processing parts with significant deviations from size and shape, causes great difficulties. Templates are laborious to manufacture and are required in large quantities with a wide range of workpieces. The device does not allow continuous processing of parts of various shapes.

The purpose of the present invention is to provide automatic tracking along a curved contour when grinding rough squared wood parts, increasing labor productivity and quality of machining parts.

This goal is achieved by the fact that a pair of grinding tools mounted on a shaft of electric motors, between which curvilinear surfaces of bars pass between, are mounted on rocker arms. The axis of turning; grinding cylinders and rocker arms are located in planes perpendicular to the direction of the workpiece feed. One of the skewers is provided with a roller, the other with an adjusting screw, the end of which is pressed against the roller with the aid of a tensioning rocker with adjustable springs. The initial clearance between the grinding cylinders is set by the adjusting screw, and in the initial position of the rocker arm is held by two opposing adjustable springs.

FIG. 1 shows the kinematic diagram of the machine; in fig. 2 - the moment of the meeting of the processed bar with an abrasive tool.

The device includes: table 1, fixed 2 and adjustable 3 guides; feed rollers 4 with sprockets 5 and drive chain 6 and sprocket 7 and the output shaft of the gearbox 8, driven by the electric motor 9; clamping rollers 10, each of which is mounted on the lever 11, detached by a spring 12 up to the stop in the stop 13; horizontal - non-stem 14 on the shaft of the electric motor 15 and the base 16 on the shaft of the electric motor 17, grinding grinding cylinders; a guide 18, along which the bracket 19 with the electric motor 17 moves, vertical abrasive tools 20 on the shafts of the electric motors 21, one of which is mounted on the rocker arm 22 with the roller 23, the other on the balance arm 24 with the adjusting screw 25; adjusting screw 26 27, tensioning rocker arms 22 and 24, held by springs 28 with adjusting screws 29.

The machine works as follows.

The required clearances between the guides 2 and 3, the pneumatic cylinders 16 and 14, as well as between the cylinders 20 using the screw 25 and the spring 26, are set to the desired initial polishing of the rocker arms 24 and 22 using the springs 28 and the screws 29.

On the table 1, the workpiece 30 is guided by the guides 2 and 3 to the rollers 4 and 10, pulling it between the grinding cylinders 16 and 14 for machining flat edges, then using the next section of the rollers the workpiece is dragged between the vertical cylinders 20 for machining curvilinear surfaces, while This contact between the surfaces to be machined and the cylinders 20 is provided by the spring 27, and the automatic follow-through of the curvilinear contour is due to the swing of the cylinders 20 together with the rocker arms 22 and 24. The rocker arms return to the original proholsdeni position after the workpiece 30 is effected by means of springs 28.

When it is necessary to treat the ends of the bent bar 30, the grinding cylinders 20 are exposed so that the plane of the end face is tangential to one of the cylinders 20 (Fig. 2). At the moment when the end of the product meets the tool, a reactive moment M appears, which tends to rotate the rocker arm with the tool, since guides 2 and 3 prevent the workpiece from being displaced. After finishing the machining, the finished product is fed into the bunker using the last section of the rollers (FIG. 1 not shown).

High quality processing is achieved

by passing a bar through a double or built-in system of grinding tools of various characteristics with a common system of feed and adjoining rollers.

The device allows to automate the processing of non-linear shaped block parts, improve the quality of processing and increase productivity.

Claims (2)

1. Manzhos, F.M. Woodworking Machines, M., “Forest Industry, 1974, p. 404-405. 2. USSR author's certificate number 127583, cl. B 24V 19/14, 1958.