RU2041756C1 - Die set for making flat such as flat friction type discs from cone blanks - Google Patents

Abstract

FIELD: metal pressure forming. SUBSTANCE: die set includes studs, extending over a generatrix of a die for centering a cone blank. A relations of a diameter of a large base of the cone blank, a diameter of stud arrangement, a diameter of studs and a height of studs are being determined in such a way, that to provide correct centering. The die set is provided by adjusting gaskets for high-accuracy adjustment. EFFECT: enhanced accuracy of articles, being formed. 2 cl, 2 dwg

Description

 The invention relates to the processing of metals by pressure, more specifically to crimping and distribution of cylindrical billets, can be used in particular for the manufacture of friction disks.

 Known stamp for the manufacture of flat rings containing a matrix with a thrust shoulder mounted on the bottom plate, and the upper plate, which is rigidly connected to the deformation plate.

 The known device does not provide the necessary alignment of the conical semi-finished product relative to the axis of the stamp, which leads to the appearance of defective rings and an increase in machining allowance, and, in addition, complicates the working conditions and reduces productivity.

 The technical result of the invention is to save material, increase productivity, product accuracy and expand technical capabilities.

This is achieved due to the fact that in the stamp for the manufacture of flat rings from conical billets containing a matrix with a thrust disk mounted on the lower plate and the upper plate with which the deformation plate is rigidly connected, a groove is made in the lower plate and the matrix is aligned with it a through hole, and the stamp is equipped with a lower plate located in the groove under the matrix and a movable plate spring-loaded to it, pushing pins passing through the matrix with the possibility of axial movement and one end rigidly connected to a movable plate, a thrust sleeve fixedly mounted on the movable plate and located in the matrix hole, and a pusher rigidly connected to the deformation plate with a diameter corresponding to the diameter of the matrix hole, while the thrust collar of the matrix is made in the form of a removable ring, the free end of each stud protrudes above the working the surface of the matrix by the value of h determined by the ratio: h <(D ₃ Dd) / 2, where D _{3 is the} diameter of the larger base of the conical billet; D is the diameter on which the studs are mounted; d is the diameter of the stud, and the length of the pusher and thrust sleeve is selected from the condition: h _t + h _c > h + h _m + H + h _b , where h _{t is the} length of the pusher protruding above the deformation plate; h _{in the} length of the thrust sleeve; h _{m the} thickness of the matrix, N the magnitude of the possible course of the movable plate to the matrix; h _{b the} height of the thrust shoulder.

 The stamp can be equipped with interchangeable gaskets located under the bases of the pusher and thrust sleeve.

 In FIG. 1 shows the stamp, left, in the upper position, right in the lower; in FIG. 2 design scheme for the specified formula.

 The stamp contains the upper 1, lower 2 and deforming 3 plates, the matrix 4, including a removable ring 5 with a thrust collar 6, a movable plate 7, ejector pins 8, thrust sleeve 9, pusher 10, springs 11, shims 12 and 13.

 The stamp works as follows.

 When the upper plate is raised, a conical billet 14 is installed on the matrix 4, which is centered relative to the axis of the stamp on one side by a thrust collar 6 of the replaceable ring 5, and on the other hand by protruding ejector pins 8. During the working stroke of the press, the pusher 10 abuts against the thrust sleeve 9. the movable plate 7 is lowered and the ejector pins 8. associated with it are lowered. The deformation plate 3 presses on the workpiece 14 and deforms it into a flat ring. When the press moves up, the ejector pins under the action of the springs with or without help (if there is no ejector pusher 15, the ring is lifted above the matrix, which facilitates its removal.

The value of h is derived from the following considerations (see Fig. 2). The conical billet has an angle of inclination of the generatrix to the axis α 45 ^about . Therefore, Δ ACB isosceles, therefore, AC AC h.

Для того чтобы заготовка гарантированно коснулась матрицы, а не зависла на выталкивающих шпильках, необходимо, чтобы величина ВС h была несколько меньше величины АС. Отсюда получаем соотношение

> hFor geometric reasons:
D ₃ D + d + 2h, whence h

In order to ensure that the workpiece is guaranteed to touch the matrix, and not to hang on the ejector pins, it is necessary that the value of BC h be slightly less than the value of AC. Hence we obtain the relation

> h

Claims (2)

STAMP FOR MANUFACTURE OF FLAT RINGS OF TYPE OF FRICTION DISKS FROM CONICAL Billets, comprising a matrix with a stop collar mounted on the bottom plate and an upper plate to which a deformation plate is rigidly connected, characterized in that a groove is made in the lower plate and the through-axis is aligned with it the hole, and the stamp is equipped with a movable plate located in the groove of the lower plate under the matrix and spring-loaded to it, pushing pins passing through the matrix with the possibility of axial movement and one end rigidly connected to the movable plate Ita, a thrust sleeve fixedly mounted on a movable plate and located in the matrix hole, and a pusher rigidly connected to the deformation plate with a diameter corresponding to the diameter of the matrix hole, while the thrust collar of the matrix is made in the form of a removable ring, the free end of each stud protrudes above the working surface of the matrix by the amount

where D _{z the} diameter of the larger base of the conical billet;
D is the diameter on which the studs are mounted;
d stud diameter
and the length of the pusher and thrust sleeve selected from the condition
h _t + h _c > h + h _m + H + h _b ,
where h _{t is the} length of the pusher protruding above the deformation plate;
h _{in the} length of the thrust sleeve;
h _{m the} thickness of the matrix;
H is the magnitude of the possible stroke of the movable plate to the matrix;
h _{b the} height of the thrust shoulder.  2. The stamp according to claim 1, characterized in that it is equipped with interchangeable gaskets located under the bases of the pusher and thrust sleeve.

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