CN100534662C - Tool for formed metal plate and section bar - Google Patents

Abstract

A tool for upsetting, expanding and drawing sheet metal and shapes having two pairs of jaws which clamp material in place therebetween and which are movable in opposite directions to effect upsetting, expanding Forging or drawing exercise. Jaws located on the same side of the sheet metal are supported on the support element by means of deformable support elements, together forming a parting line and fixed together by sleeves, characterized in that the jaws of the pair of jaws in the circumferential region have respective The radial extension of the radial extension is placed on the anti-impact ring bridging the support element at the circumference between the support element and the jaws, a sleeve with a closed edge is placed around the pair of jaws, the closed edge and the anti-shock The impact rings together form a sliding guide for arranging the jaws radially with play in the sleeve.

Description

Tools for forming sheet metal and profiles

technical field

The invention relates to a tool for forming sheet metal and profiles, in particular for upsetting, expanding and drawing sheet metal and profiles.

Background technique

Such a tool is disclosed in German Patent DE 1093311, which comprises two pairs of jaws which clamp the material in place between them and which are relatively movable in order to perform an upsetting or spreading movement. In this example, the jaws are placed on deformable support elements, which are in turn supported on the lower part. Those separate parts which are inserted one into the other and placed one on top of the other are held together by means of a two-piece sleeve whose flanges engage in grooves in the jaws and the lower part. These sleeve halves are fastened together with countersunk screws.

A disadvantage of this example is that the machining of such a tool part with grooves and edges is expensive due to the complex assembly and the increased susceptibility to wear of the jaws.

Contents of the invention

It is therefore an object of the present invention to provide a tool for forming sheet metal and profiles which is inexpensive to manufacture and which at the same time exhibits a low rate of wear on the workpiece.

The object of the present invention can be achieved by a tool having the following characteristics. A tool for upsetting, expanding and drawing sheet metal and shapes having two pairs of jaws which clamp material in place therebetween and which are movable in opposite directions to effect upsetting, expanding Forging or drawing movement, the jaws on the same side of the metal plate are supported on the support element by deformable support elements, together forming a parting line and fixed together by the sleeve, characterized in that in the circumferential area the jaws The jaws of the pair have respective radial extensions which are seated on the anti-shock ring bridging the support element at the circumference between the support element and the jaws, a sleeve with a closed edge is placed around the pair of jaws , the closed edge together with the anti-shock ring forms a sliding guide for arranging the jaws in the sleeve radially with play.

Thus, a rapidly assembled tool for upsetting, expanding and drawing sheet metal and profiles is provided. During sheet metal forming, in particular during swaging or drawing, the jaw pairs are guided slidingly, which differs from a tilting movement and only slightly loads the tool. The result is a significantly longer tool life.

Using an anti-shock ring, the tool can be assembled simply by placing one part on top of the other.

Further advantages and configurations of the invention are apparent from the following description and the dependent claims.

Description of drawings

The invention will be described in more detail below with reference to exemplary embodiments shown in the accompanying drawings.

Figure 1 is a side view of a spread forging tool according to the present invention;

Fig. 2 is a cross-sectional view along line A-A in Fig. 1 .

Detailed ways

The tool shown in Figures 1 and 2 comprises a tool lower part 1 and a tool upper part 2, the tool lower part 1 and the tool upper part 2 are of the same construction and interact so as to clamp in place between them. The material is shaped. In this example, the respective structures of the tool lower part 1 and the tool upper part 2 are as follows.

A pair of jaws 3, 4 comprises two semi-cylindrical jaws which together form a parting line 5 and are movable in opposite directions for upsetting, spreading or drawing motions . The jaws 3 , 4 are arranged centrally on a deformable support element 6 . This support element 6 is in turn supported on a support element 7 which rests on an actual support base (not shown in the figure). In an edge region, the clamping jaws 3 , 4 rest on an anti-shock ring 8 , which surrounds the support element 6 and is in turn supported on the support element 7 . The individual parts inserted one inside the other and placed one on the other are fixed together by means of a one-piece sleeve 9, of which the one-piece sleeve 9 acts with the closing edge 10 in a radial direction. The radial extension 11 is provided on each jaw 3 , 4 in the circumferential region, more precisely on the side facing the support element 6 .

The closing edge 10 together with the upper surface of the anti-shock ring 8 forms a sliding guide 12 in which the jaws 3, 4 guided by the radial extension 11 can move radially, for this purpose the sleeve 9 accommodates the jaws 3, 4 with clearance in the radial direction.

The sleeve 9 is fastened with countersunk screws 13 , 14 .

The supporting element 6 comprises a plurality of steel sheets 15, here four, between which elastic inserts 16 are arranged in each case in order to enable relative movement of the steel sheets 15. Preferably, these resilient inserts consist of leaf spring assemblies. In order to support the steel sheet 15 forming the connecting element between the two jaws 3, 4 and the supporting element 7, grooves 17, 18 are provided on the underside of the jaws 3, 4 and on the upper side of the supporting element 7, these The grooves 17, 18 are offset relative to each other so that the steel sheets 15 have the necessary inclination. If the steel sheet 15 is inclined outwards as shown in FIG. 1, the forming operation results in stretching of the metal sheet or profile. Alternatively, if the steel sheet is inclined inwardly, the forming process can result in upset of the sheet metal or shape. The steel sheet 15 may also be made of another suitable high-strength material.

During operation of the tool in normal mode, if a vertical pressure is exerted between the lower tool part 1 and the upper tool part 2, the two jaws 3, 4 move away from each other, thereby expanding the material. In this process, these thin steel plates 15 then carry out a circular movement along their inclined direction, and when the vertical pressure is removed, these thin steel plates 15 reach the normal inclined position again under the elastic force of the elastic insert 16 .

In a tool for upsetting a material, the steel sheet is positioned to face inwards consistently. During the application of a vertical pressure for upsetting the material from above, the two jaws 3 , 4 approach each other, thereby upsetting the material.

In this example, guided by the pushed sleeve 9, the jaws 3, 4 are caused to move outwards in the same way as they are moved inwards. Since the anti-shock ring 8 is arranged at a distance from the support element 6, the support element still has sufficient movement play for outward movement.

Finally, a receiving groove for a typical strip 19 can also be provided on the sleeve 9 .

Claims (6)

1, a kind ofly be used for upsetting, the instrument of stretching and drawing metallic plate and section bar, have material clip is tightened in place between them, and two jaws that can move in the opposite direction are right, so that realization upsetting, stretching or drawing campaign, in each case, the jaw that is positioned at the metallic plate same side is supported on one first support component by a deformable second support component, form a die parting line together and be fixed together by a sleeve, it is characterized in that: at circumferential zones, the jaw (3 that jaw is right, 4) has separately radially extension (11), this radially extension (11) be placed in first support component (7) and jaw (3, on the shock resistance ring (8) of circumference place bridge joint second support component (6) 4), sleeve (9) with closed edge (10) can be placed on jaw to around, this closed edge (10) forms a sliding guidance portion (12) with shock resistance ring (8), so that radially have with gap jaw (3,4) is arranged in the sleeve (9).

2, instrument according to claim 1 is characterized in that: described second support component (6) has the steel sheet (15) of inclination, is provided with elastic plugin (16) between steel sheet.

3, instrument according to claim 2 is characterized in that: described elastic plugin (16) is made of the leaf spring group.

4, according to claim 2 or 3 described instruments, it is characterized in that: described steel sheet (15) is positioned to outward-dipping, so that realize the stretching motion.

5, according to claim 2 or 3 described instruments, it is characterized in that: described steel sheet (15) is positioned to and slopes inwardly, so that realize the upsetting campaign.

6, according to the described instrument of one of claim 1 to 3, it is characterized in that: described shock resistance ring (8) is positioned to from second support component (6) one segment distances.

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