CS196468B1 - tool - Google Patents

Abstract

The invention relates to a tool for drawing spherical, conical and stepped extracts.

Description

DESCRIPTION OF THE INVENTION

TO THE COPYRIGHT CERTIFICATE

CZECHOSLOVAK SOCIALISTIC

REPUBLIC (19) 196 468 (11) (B1)

OFFICE OFFICE AND DISCOVERY (61) (23) Exhibition Priority (22) Registered 23 05 77 (21) PV 3363-77 (40) Published 29 06 79 (45) Issued 01 3 82 (51) Int. Cl? B 21 <J 22/00

.'W J.) (75)

Author of the invention SZABÓ EDMUND ing.CSc.

VARGA JOZEF ing., KOICE (54) Towing tool

BACKGROUND OF THE INVENTION The present invention relates to a tensile tool of a spherical, conical, and step-like extension.

The known drawing pulls on the tools in simple, poor, progressive and final kallbreceia drawing are based on the principle that spherical, conical and stepped extracts are drawn in successive operations, with the steps being limited by the available pull coefficient. Each of these strokes is carried out by a separate forming machine for a given stroke. In the case of a further intermediate storage, material aging can occur, resulting in a loss of ductile properties of the material as in similar operations, without intermediate storage. They increase sastrat times by manipulating the blank of one machine to the other, and the possibility of incapacitation by misfolding the tools for the next moves increases. Depending on the number of strokes, the overhead costs of producing these parts increase. The solution of similar issues is also related to English. Patent No. 1438 207 ·

The aforementioned drawbacks are eliminated by the method of drawing according to the invention, the principle of which is that the punch consists of a set of telescopic parts. The individual parts move independently to each other at vigorous speeds. Their differentiated movement is such that they support the shear evenly every time and prevent its loss of stability and the formation of secondary wines. This movement is ensured by the individual cams, each of which is fixed on the drive shaft. The constant pressure on the shear in the intermediate region of the mine and the retainer is embedded either by the cam mechanism and the spring or by another known design arrangement. The deep drawing tool of the present invention provides a better tensile epoxy, since in the initial position, where the " non-held " area has been large, the telescopic lengths of the mine support evenly the entire surface of the cutter and thus prevent! the possibility of loss of stability in spherical extracts. In the high-grade, the number of strokes in separate tools for each stroke is eliminated, as the telescopic hoist system with retainer forms a combined pulling tool for all pulls. Reduces the number of strokes in complex shapes to a minimum and with that the cost of production.

The drawing shows an example of an embodiment of a drawing tool according to the invention. The embodiment 2 mounted on the machine frame moves the punch 1 consisting of telescopic parts terminating in the upper part with projections g with contact surfaces whose independent movement is derived from the cams J fixedly mounted on the drive shaft. With the beginning of the pulling of the shear 6 placed on the center of gravity 2, Fred is pressed by a retainer 8 which, by means of the spring 22 of the rod 1.0 in the guide 11 from the front cam 2, is pressed in the drawing process by a constant flange of the flange. The shape of the cams J is designed so that the movement of the individual telescopic drawing tool 1 will prevent the loss of stability of the molded surface 6 during the entire process. the movement of which is dependent on the cam J with the max. The frame 13 is carried through the elastic bond 14 upwardly over the arms 15 fixed to the protrusions 6 of the individual multi-telescopic puller 1. The cam shaft 6 is supported by the flywheel 12 through the drive assembly 18. The pulling tool can be used to pull the extracts through the overflow through or to extract the flange extracts. In the case of pulling the graduated extracts 19 below the telescopic puller 1, there are telescopic retainers 20 in the opening of the excavator 2. The holding force for each part is adjustable by means of the coils 21. In the lower dead center of the excavator 1, the position of the holders 20 corresponds to the final shape of the extract 22 and in the case of poor movement of the punch 2 have an ejector function. Pulling according to the invention It is suitable for use mainly of spherical, conical, graded and similar extracts. The tool set allows you to deplete the entire stock of elasticity to a single stroke until the material of the extract is fully consolidated, thereby minimizing the number of pulls in complex yield shapes. By using the proposed tool, the productivity of the work will increase proportionally to the reduction in the number of strokes relative to conventional prior art tools. This saves energy, consumes tooling materials, blocks machines, and manages machine tools, and provides inter-operative maneuvering and surface areas for the machine block and the landfill site. For the complexity of the drawing tool concept, the use is suitable for large-scale production.

Claims (2)

OBJECT OF THE INVENTION 1. a drawing tool recalled from a telescopic punch and independently and moving parts, a restraint and a center of gravity, characterized in that the center of gravity (1) is formed by vertical telescopic parts at its upper end terminated by protrusions (5) with arms (15) and (3), mounted on an aperture drive shaft (4), on which a front cam (9) is provided on both sides of the punch (1) and connected to the drawbar (10) of the retainer (8), 1) are connected by means of springs (14) and a frame (13), slidably mounted in the guide (22) and adjoining the cam (3). Towing tool according to claim 1, characterized in that a telescopic assembly of the lower retainers (20) is located in the opening of the center of gravity (7) below the telescopic pusher (1).