SU716675A1 - Die for reversible finishing cutting-out of parts and piercing holes therein - Google Patents

Description

The invention relates to tooling _: for processing sheet metal and can be used in engineering, instrumentation and other industries' for fine cutting parts and punching holes in them.

A stamp is known for fine reversible cutting of parts from sheet material on a single-action press, containing a punch and a clamp coaxially mounted in one part and a clamp, and in the other, a matrix and a counter-punch. The stamp is equipped with a node for relative displacement of the working parts of the stamp, 15 located in one part of the stamp .. The node of movement is made in the form of Belleville springs [1].

However, the known stamp cannot be used for punching holes of 20 holes in the cut parts.

A stamp is known for fine reversible cutting of parts and punching holes in them on presses of simple _ action, in which cut-offs are coaxially mounted on the upper and lower-25 plates. naya matrix, punch - matrix and punch punch. The stamp is equipped with a node that reports the relative movement of the die cutting matrices, the punch - 30 matrices and punch punches. This assembly is a pneumatic-hydraulic head that connects the stamp with the press (2). However, the known stamp has a construction of the assembly that reports relative movement to the working tools, which complicates the manufacture of the stamp as a whole. In addition, the operation of this assembly is associated with the need for oil supply, sealing cavities, providing the necessary pressure.

The purpose of the invention. - simplifying the design of the stamp and facilitating the conditions of its operation.

This goal is achieved by the implementation of the node relative movement in the form of spring-loaded creeps, wedges and elastic interacting with them. elements. The creepers are placed on the bottom plate of the stamp with two tiers located one above the other. The creepers located in the upper tier interact with the upper matrix, the creepers located in the lower tier interact with the lower punch - matrix. Elastic elements are installed between the upper and lower plates and the corresponding matrices and punch matrices.

In FIG. Figure 1 shows the 'stamp, general view' on the left - in the position of contact of the working tools with the workpiece and the lower punch-matrix with crawlers, '' on the right - in the position of introduction of the upper tools' into the workpiece to the part _ of its depth and the emphasis of the pushers in the lower ³ plate : na'fig. 2 - the same (on the left is the contact position of the working tools with the workpiece and the lower puncheon with the crawlers, on the right is the position at the bottom dead center); in FIG. 3 - semi-finished product after the introduction of tools on a part of its thickness; in FIG. 4 - finished part in the waste.

The stamp contains the bottom plate; that 1, on which stands 2, the lower die cutting matrix 3, punch-matrix are fixed; In the racks 2 are the sliders 6, the stamp contains 8, on the upper hole 10 die-cutting matrix 3, pois 4, punch 5. in two tiers are equipped with springs 7. The upper plate is also swarm; wedges 9 are fixed. ruby matrix 10, punch matrix

11, punch punch 12. Cutting “dies 3 and 10 are supported respectively on the lower 1 and upper 8 plates through the pusher 13, elastic elements 14 and 15. The lower 4 and upper 11 punch dies are spring-loaded with elastic elements 16 and 17, respectively. The stamp works as follows way. When the press slide moves down, the upper plate 8 together with the upper punch 11, the upper die 10, the upper punch 12, the wedges 9 and the elastic elements 17 and 15 are lowered. In this case, the upper punch matrix 11, the upper matrix 10 and the upper punch 12 press the workpiece 18 against the lower punch matrix 4, the lower punch 5 and the lower matrix 3, the lower and upper elastic elements 16, 14, 17 and 15 are partially compressed, and the lower punch-matrix 4 is lowered all the way into the lower crawlers 6 (see Fig. 1 left view).

In the further course of the press slider, the wedges 9 move their upper spring-loaded sliders 6 horizontally with their upper protrusions, which in turn move their wedge protrusions 20 downward relative to the upper puncheon 11, the upper die 10 and the upper punch 12 by up to 0, 25 S, Lower matrix 3 and lower punch 5 55 are also lowered relative to the lower punch matrix 4, causing the insertion of this punch matrix 4 into the blank. 18 is cut by the same value of 0.25 S.

In this case, the lower elastic element

14, as well as the upper elastic elements and 17 are additionally compressed, and the pushers 13 abut against the lower plate 1 (Fig. 1, right view), and the workpiece takes the form shown in Fig. 3.

With the further course of the press slide down, the wedges 9 with their lower protrusions disengage the lower creepers 6 with the lower punch matrix 4, the elastic elements 16 and 17 are finally compressed ', and the upper plate 8 is lowered until it touches the upper surface of the punch matrix 11 (Fig. 2, left view).

When the slider is lowered to its lowest position, the upper plate 8 together with the upper punch-matrix 11 are also lowered and the punch 11 makes a complete cut along the outer and inner contours, the lower punch-matrix 4 is lowered and finally reduces the elastic element 16 (Fig. 2 , right view), and the workpiece 18 takes the form shown in FIG. 4.

During the reverse stroke of the press slider, the moving parts of the stamp are returned to their original position, and the finished part with waste is removed from the working area of the stamp. A new workpiece is installed in the working area of the stamp and the cycle is repeated.

Claims (1)

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