SU642054A1 - Die set for successive bending or work - Google Patents

Description

3

The spring-loaded Origami is placed in the punch and the final 1-bezel unit is equipped with an additional spring-loaded clamp located in the matrix, and with a dividing plate, fixed in the holder in the cooperating as well as the additional spring-loaded clamp, with a mandrel, and both matrices are made with strands placed on their working surfaces at a given angle relative to each other.

The invention is illustrated in the drawings, where in FIG. 1 shows the proposed stamp, a general view; in fig. 2 - the lower part of the shtamp, top view; in fig. 3 is a section along A-A in FIG. 2; in fig. 4 is a section along BB in FIG. 2; in fig. 5, 6 - we manufacture the part in two projections.

The stamp contains the upper 1 and lower 2 plates, on which the nodes of the preliminary 3 and final 4 (see Fig. 4) are placed. The pre-bending assembly 3 comprises a punch-5 and a spring-loaded clamp 6, placed both connected with the upper I plate and interacting with the die 7, carrying the ejectors 8 located in it, and fixed on the lower 2 plate. The final bending unit 4 is made in the form of a mandrel 9, which may be cylindrical, fixed in the holder 10, a dividing plate 11 attached to the holder 10 connected to the upper I plate, and the matrix J2 with an additional spring-loaded clamp 13 in it located on bottom 2 plate. The separator plate II and the additional spring-loaded clamp 13 cooperate with the mandrel 9 on diametrically opposite sides. Matrices 7 and 12 are made with streams 14, 15 located on their working surfaces at a predetermined angle of -1 relative to each other. The angle t corresponds to the lifting angle of the helix to be made.

The stamp works as follows. The blank 16 in the form of, for example, wire is fed up to the stop 17 along the stream 14 of the matrix 7.

At the beginning of the press stroke, the clamp 6 under the action of the spring 18 presses the workpiece against the die 7 and at the end of the stroke forms the middle section of the preliminary profile 19 in the form of an arc of radius R, where R is equal to the radius of the helix being made (see Fig. 3). At the same time, under the action of the punch 5 of the pre-bending, two extreme portions "in the form of arcs of the same radius and two connecting portions" and in the form of arcs are formed. The resulting billet 19 of the P1D pre-profile is an action of a spring-loaded ejector, pey 8 extract 4

It is fed from the matrix 7 to the matrix 12 for final bending to the stop 20 along the creek 15, where it is held by fixing strips 21. In the matrix 7 posting, the preparation of the subsequent part for the preliminary bending. When the additional spring-loaded clamp 13 and the cylindrical mandrel 9 of the section "a and" c, the pre-profile blank 19 is converted into a semi-turn, and the end portions of the b, which are bent around the cylindrical mandrel 9 and directed by the spacer plate II, form the given part 22 (see Fig. five).

During the reverse course of the press clamp 13,

returning to its original position under the action of springs 23, pushes the finished part out of the die cavity, pressing it against the mandrel 9 in order to prevent the ring from being pulled out into an ellipse.

Reaching the top point of the press ram,

the part is freely removed from the mandrel 9 by increasing the internal diameter of the part due to the elasticity of the material,

In the stamp, in one stroke of the press, a finished part is obtained, since the transitions of the preliminary and final bending are performed sequentially.

A semi-annual savings from the introduction of chip is about 500 rubles.

Claims (2)

1. Author's certificate No. 373059, cl. B 21 .D 37/08, 1970. 2.Zubtsov M.E. Listova stamping, M., 1967, p. 385-386, fig. 204. .one -A tt.tt% t t7 Fig.Z / 7 It us-. 2g 2.S 22 FIG b