SU1169780A1 - Blanking die - Google Patents

Abstract

STAMP FOR CUTTING DETAILS of sheet material containing a matrix fixed on the bottom plate, a puller, a punch mounted on the top plate, an ejector placed in the cavity of the punch with the possibility of axial movement and connected with one of the plates by an unequal arm mounted on a support with the possibility rotation in a vertical plane, characterized in that, in order to improve the electrical characteristics of the outgoing stator and rotor plates by eliminating additional residual stresses, x in the process of cutting, the puller is equipped with a spring, the support is fixed on the puller and its end facing the lever has a spherical shape, the smaller arm of the lever has a forked shape, on the inner surface of the fork there are two cylindrical grooves arranged symmetrically with respect to the axis of the fork and forming a cylindrical the surface with the axis inclined to the base, the end of the smaller arm of the lever in the plane of the lever's rotation has the shape of a sector of a circle, and in the vertical plane perpendicular to it Q вертикальн is the shape of a trapezoid expanding upward, in the (L top plate for accommodating part of the support and lever, there is a cavity with a supporting cylindrical surface having a radius equal to the radius of the surface of the end of the lever, and a section in the plane of the cylindrical surface in the plane and perpendicular to the plane of rotation) of the lever, trapezoidal forms with “lateral sides parallel to the sides of the ends of the lever.

Description

11 The invention relates to the processing of metals by pressure, in particular to die tooling for the manufacture of stator and rotor plates from electrical sheet material. The purpose of the invention is the improvement of electrical characteristics. stator and rotor cutting plates by eliminating additional residual stresses created during the cutting process. : FIG. 1 shows a stamp, a diagonal section I in FIG. 2 — the same, the moment of pushing the cut-out part / in FIG. 3 — section A-Ana of FIG. 1, FIG. 4 — a two-arm lever, a view of dry | Fig. 5 shows a double-arm lever, section B-B in Fig. 1. A punch for cutting a top plate contains a composite part in the form of a base plate 1 of the transition plate 2 and a punch holder Z. On the plate 2 a nut 4 is installed to tighten the spring 5 connected to the holder 6 of the ejector 7 placed in the punch 8 installed in the punch holder 3, the drive of the movement of the ejector 7 is complete in the form of an unequal arm 9 mounted on a support 10 with a spherical head, adjustable in height by a nut 11 on the puller 12, which is spring-loaded pru7 13 and attached to the top plate with a screw 14, the Matrix 15 is fixed on the bottom plate 16, the Smaller shoulder of the two shoulders lever has a fork shape with ends 17 and 18, executed in the plane of the arm rotation, in the form of circular sectors 19, and in the vertical plane perpendicular to it the shape of a trapezoid extending upward and having lateral sides 20 and 21, mating with cavity 22, made in a punch holder 3. The cavity has a supporting cylindrical surface with a radius Mj equal to the radius of the end surface and a trapezoidal cross-section perpendicular to the pH ie the plane of rotation of the lever. The sides 23 and 24 of the tralecene cross section are parallel to the respective sides of the end of the lever. The spherical head of the support 10 is mated with a fork of a two-arm lever by means of cylindrical grooves 25 and 26, which are symmetrical to the axis of the fork and form a cylindrical surface with an axis inclined to the base m. Large shoulder 27 of the lever 9 in contact with the holder 6 of the ejector 7, the Workpiece is indicated by the position 28, the detail - 29, Stamd works as follows. After installing the workpiece 28 on the matrix, the upper part of the stamp moves downwards. At the moment of contact of the puller 12 with the matrix 15, the fork of the two shoulders leans against the adapter plate 2, the Large arm 27 of the double shoulders lever 9 rises to its horizontal position and lifts the holder 6 and the ejector 7, which is set flush with the end face of the punch 8, the outset of part 29 occurs. After the part is cut, the upper part of the punch returns to its original position, and the puller 12 remains pressed against the spring matrix 15 13 until the screw head 14 contacts the punch holder 3. At this time, the spherical head of the support 9 slides along the grooves 25 and .26, moving the smaller arm of the lever 9 into the cavity 22 and turning the larger arm 27 of the lever 9 to interact with the holder 6, an ejector 7 which pushes the cut-out part into the window of the die 15. After the workpiece 28 is supplied, the cycle is repeated,. The invention will improve the quality of the parts.

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Claims (1)

DIES FOR CUTTING ITEMS from sheet material, containing a matrix mounted on the bottom plate, a puller, a punch mounted on the top plate, an ejector placed in the cavity of the punch with the possibility of axial movement and connected to one of the plates with an unequal lever mounted on the support with the possibility of rotation in a vertical plane, characterized in that, in order to improve the electrical characteristics of the cut-off plates of the stator and rotor by eliminating additional residual stresses generated in In the course of felling, the puller is equipped with a spring, the support is fixed on the puller and its end facing the lever is spherical, the smaller lever arm is forged, two cylindrical grooves are made on the inner surface of the fork, located symmetrically relative to the axis of the fork and forming a cylindrical surface with the axis inclined to the bases, the end of the smaller arm of the lever in the plane of rotation of the lever has the shape of a circle sector, and in the vertical plane perpendicular to it, the shape of the trapezoid, expanding upward, in the upper plate to accommodate part of the support and the lever is made a cavity with a supporting cylindrical surface having a radius equal to the radius of the surface of the end of the lever, and the cross section on the site of the cylindrical surface in the plane perpendicular to the plane of rotation of the lever, trapezoidal with sides parallel to the sides of the end of the lever . SU „„ 1169780> I 1 169780