RU1779436C - Flanging die - Google Patents

Abstract

Usage: metal forming, sheet stamping, flanging holes for threads. SUMMARY OF THE INVENTION: A fixed punch is installed in the stamp, on which a spring is mounted, supporting a movable punch with a spring-loaded sleeve and provided with a lock nut in the lower part. There are two spring-loaded symmetrically with respect to the movable punch. Wedges interact with two-stage recesses in a movable punch. The sleeve has a tapered groove. An adjusting nut is installed on the top of the sleeve. A die die is attached to the press slider. During the operation of the die, first the preliminary punching of the movable punch into the material is carried out, after which a flange is carried out by the stationary punch. 1 s P. fl., 4 ill.

Description

The invention relates to the processing of metals by pressure, and more particularly, to the flanging of holes for threads.

A known method of forming parts with a flange, however, the tool for its implementation is imperfect.

A stamp for punching and flanging is known.

This stamp does not allow a board of increased height and thickness to be obtained by using an additional set of material from the periphery of the hole.

The purpose of the invention is to expand the technological capabilities of the die to obtain a bead of greater thickness and height.

The goal is achieved in that in the flanging die containing the matrix, a fixed base with a punch placed on it, covering the punch with an axially movable clamp made in the form of telescopically connected bushings, the punch is fixed at the base, the outer sleeve is made with wedge sections on the side surface , the inner sleeve has a supporting collar, and the stamp is equipped with a fixation unit for the outer clamp sleeve, made in the form of spring-loaded wedge creepers mounted in the base with the possibility of radial th offset from reacting with the wedge portions of the outer sleeve and periodic contact with the supporting shoulder of the inner sleeve. The outer sleeve is made up of a composite of upper and lower parts connected to each other by means of a threaded pair.

In FIG. 1 shows the proposed stamp, General view; in FIG. 2 - same, plan view; in FIG. 3 is a diagram of the arrangement of working parts at the time of extrusion of material from the periphery of the hole into the extruded board; in FIG. 4 is a diagram of the arrangement of the working parts at the time the flanging is completed.

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The stamp contains a base 1 (Fig. 1), in the center of which a fixed punch 2 is mounted, a spring 3 is put on it, lying on the base and supporting the inner sleeve 4, on which the outer sleeve 5 is located, coupled with the sleeve. clip. The sleeve 5 is supported by a spring 6 and provided with a lock nut 7 at the bottom. Spring-loaded wedge-shaped sliders 8 are located symmetrically on both sides of the punch and abut against the spring 9 with their outer ends. The sliders are provided with windows 10 through which the parts interacting with the sliders pass outer sleeve. The ends of the creeps are supported in the initial position by the support collar 11 of the inner sleeve 4. The outer sleeve is provided with wedge sections 12 interacting with the cushions, the upper part of the sleeve ends with the adjusting nut 13. The matrix 14 is mounted on the press slider.

The stamp works as follows.

A preform with a pre-punched hole is laid on the stamp with a hole on the catcher (Fig. 1, Fig. 3). When the matrix 14 moves downward (Fig. 1), the material is pressed by the outer sleeve 5 through its upper part of the nut 13 and pre-flanging is made by the punch 2. The inner sleeve 4 is initially set lower than the sleeve 5 and the punch 2, therefore, between the sleeve 4 and the workpiece for some time clearance is maintained.

With further movement of the matrix, the sleeve 4 touches the workpiece and extrusion of the material into the formed side begins (Fig. 3), at the moment when the punch 2 creates optimal conditions for the flow of metal. At the time of extrusion, the sleeve 4 remains stationary, held by the cogs 8, the ends of which support the support collar 11 of the sleeve 4. Under the action of the wedge-shaped sections 12, moving downward, the cogs 8 interacting with the counterpart in the window 10 move from the center, releasing the sleeve 4 for unobstructed downward movement. This position is depicted in FIG. 1. With a further movement of the matrix down, the sleeve 5 also goes down, pressed against the workpiece from below by a spring 6. The sleeve 4 also moves downward, pressed from below to the workpiece by a spring 3, but the material is no longer extruded. The punch 2 produces the final molding of the side (Fig. 4). When the matrix is lifted up, the springs 3, 6, 9 return the crawlers, the outer and inner bushings to their original position. Nut 13 serves to adjust the value of h (Fig. 3), i.e. the thickness of the extruded layer on which the side height depends. Rotating the nut 13 (Fig. 1), establish the moment the crawlers leave from under the support collar, i.e. shutting down the inner sleeve 4 from operation. Thus, due to the collection of material from the periphery of the hole, the stamp can flang a higher bead provided it is installed on presses of any design.

Claims (1)

1. A stamp according to claim 2, characterized in that, in order to adjust the position of the pressure sleeves in the axial direction, the outer sleeve is made up of upper and lower parts connected to each other by means of a threaded pair. Joint venture ///./ {f f) / % . Ш4 //// 2УА ZZZZZZZ 444 Fig.Z