DD210182A3 - DEVICE FOR PARTIAL MASSIVE FORMING - Google Patents

Abstract

The invention relates to a device for partial massive forming flat and squat, preferably rotationally symmetric workpieces. The aim of the invention is to rationally produce flat and stocky workpieces, even in small numbers, with comparatively better workpiece accuracy and lower forming forces. The object d.Erfindung is a device for partial massive forming of flat or stocky workpieces using a horizontal, the workpiece gradually rotating support and several vertically or at an angle less than 90 degrees C and acting parallel to the workpiece support forming tools. According to the invention, the object is achieved by vertically and / or at an angle of less than 90 degrees C and the horizontal pressure pads acting on the workpiece support with tools offset symmetrically with respect to one another and uniformly distributed to a rotating workpiece support.

Description

Word direction for partial massive forming. Field of application of the invention

The invention relates to a gate direction for partial massive forming flat and squat, preferably rotationally symmetrical workpieces »

Characteristic of the known technical solutions

It is known to produce flat and stocky workpieces larger numbers of corresponding output shapes by drop forging. A prerequisite for this is workpiece-bound tools with a high degree of shape storage, the production of which is cost-intensive and therefore only economical with larger quantities. Workpieces that can only be produced in no quantities are produced almost exclusively by means of machining devices of the cutting shaping with the known wax parts of the chip removal area, high loss of work piece material and the partial destruction of the fiber course of the material.

For a reshaping shaping of workpieces, which is needed only in small numbers; v / earth, the open-die forging is known for larger workpiece dimensions, but only low workpiece accuracy in coarse Töleranzklassen possible and the feasible workpiece shapes are limited. Furthermore, the TCaltmassivumfornien by tumbling is known. Ss is suitable for small workpiece dimensions. In the case of "this", a partial interference with the blank by means of sliding wobble

movement of the inclined by an angle upper tool made. The lower die is fastened in a vertical direction austeilbar on your press table and carries the workpiece.

For the production of long, rotationally symmetric parts, such as s, 3rd stepped axles and shafts or rod material with round square or rectangular cross-section, horizontal or continuous forging machines are used. Hammer or press on the workpiece a plurality of radial-symmetrically arranged plunger, on which forged Schmiedewerkseuge are attached. The workpiece mounted in an axially movable chuck is moved longitudinally and can be rotated continuously. "The rams are driven by a motor through gears, eccentric shafts, sliding blocks and connecting rods. The eccentric shafts are mounted in automatically or manually adjustable housings. The Torschub- and rotational movements of the workpiece take place continuously and can be variably adapted to the different cross sections of the long workpieces.

DE-QS 24 38 13 "proposes a forging press for forging semifinished products, which can be used not only for rings but also for bars of different cross-sections, but the forging of rings with a rectangular or square cross-section is the forging press with a vertical acting One jaw serves as an abutment, the other one is moved hydraulically against the first one and forms the detected cross-section The vertically acting pressing device is arranged in a swiveling frame on both sides With this device, the ring can be gradually rotated by being gripped by the jaws of the vertical-acting pretensioner and swung a short distance (about half the width of the jaw), and then, authoriz resting on the support while the frame is being returned to its original position. The pressing devices are

alternately operated. The horizontal distance between the two pressing devices is adjustable, lifting or instead of the horizontally acting pressing device can also be used which act at an angle to the horizontal. This also makes it possible to form rings with a rectangular or square cross section (see DT-PS 151 436).

Object of the invention

The aim of the invention is to produce flat and compact workpieces even in small quantities with relatively better workpiece accuracy and lower forming forces efficiently ·

Presentation of the 'yesens of the invention

The object of the invention is a gate direction for partial massive forming of flat or stocky workpieces using a horizontal, the workpiece stepwise rotating support and several vertically or at an angle less than 90 and acting parallel to the workpiece support forming tools.

According to the invention the object is achieved in that vertically and / or at an angle less than 90 ° and the horizontal acting to the workpiece support ram with tools offset symmetrically to each other and evenly distributed are associated with a rotating workpiece support.

In vorsugsweisen the press ram are pivotally mounted, the workpiece support is designed as a replaceable lower die and the stroke of the press ram adjustable and controllable.

The path-controlled tools with a reduced shape-memory degree arranged around the workpiece form the workpiece zone-wise and stepwise by a number of beats or pressings. Depending on the required workpiece shape, the tool active surfaces may have different sizes or shapes.

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The device can be equipped with a program control. With comparatively small forming forces, flat and compact workpieces can be produced with simple tools and a high degree of forming accuracy, whereby the use of the gate direction is economically justifiable even with small pieces. Especially with the latter, their particular advantage becomes visible.

embodiment

In the drawings show

Fig. 1 shows the scheme of a device according to the invention in plan view and

Pig. 2 the section A-A by Pig. 1.

On a workpiece support 1, which is for example part of a machine table, is the semi-finished product (dash-dotted line) or the formed workpiece 2 «The support is gradually rotatable and adjustable in height. In parallel with the support 1, the plungers 3 are arranged around the workpiece 2 with the forming tools 4 fastened on the front side. The plungers are moved hydraulically against an adjustable stop 5. From above, the workpiece with the tools 6 is transformed. They are guided perpendicular to the support or parallel to the axis of symmetry of the workpiece and driven together by the plunger or bar of the pressing or forging device. Between the strokes, the support 1 is rotated stepwise with the workpiece 2. Depending on a given program, the machine setting of the stops 5 and the workpiece support 1 until reaching the finished shape of the workpiece Depending on the other requirements for the outer geometry of the workpiece 2 additional dies and at an angle to the workpiece axis guided upper tools S can be used become"

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Claims (5)

- _ 5 -
invention claim 1. Apparatus for partial Massivumfornien of flat or stocky workpieces, consisting of a horizontal, the workpiece stepwise rotating support and a plurality of vertical or, at an angle less than 90 ° and acting parallel to the workpiece support forming tools, characterized in that vertically and / or in one Angle smaller than 90 and the horizontal direction of the workpiece support press ram with tools (4; S) offset symmetrically to each other and evenly distributed a rotating workpiece support (1) are assigned. 2. Device according to item 1, characterized in that the press rams are pivotable with the tools, 3. Device according to item 1, characterized in that the workpiece support is designed as a replaceable lower die. 4. Device according to item 1, characterized in that the stroke of the press ram is adjustable and controllable, 5. Device according to item 1, characterized in that the tools have different geometrical shapes on their active surfaces. For this 2 sheets of drawings