Chetyrehballnoe forging device

 

The invention relates to the processing of metals by pressure and can be used in the forging of ingots and billets on hydraulic forging presses and radial crimp machines. Two holders of the upper and lower heads and two holder side Boykov performed with the respective inclined surfaces and kinematically linked with the help of eight guides a U-shaped cross-section. Each of the guides on one side fixedly mounted on the side surface of the holder upper or lower firing pin. On the other hand guiding his inclined plane is in movable contact with the inclined plane of the holder side is brisk. To holders attached jaunty. These inclined planes of the guides are angled 0-75° to the inclined surfaces of the holders of strikers. The lower holder striker made with longitudinal grooves. In the lower part of the side holders Boykov installed scrapers or brushes, which are based on its working surfaces on the sliding surface of the holder bottom firing pin. The result eliminates the possibility of jamming of the holders of the lateral strikers in the guide and hit the scale on the sliding surface. 4 I processing of metals by pressure, namely chetyrehochkovym forging device and can be used in the forging of ingots and billets on hydraulic forging presses and radial crimp machines.

It can be used in machine-building and metallurgical industry for the production of products with a long axis, rolling mills and similar products, as well as in the production of forged blanks for further processing pressure, for example, forging structural, stainless, heat-resistant and hard steels and alloys.

Known chetyrehballnoe forging device used in chetyrehvalkovoj radial crimping machine (see, for example, the book “Forging on radial crimp machines” (C. A. Tyurin, V. A. Lizorkin, I. A. Pospelov and others - M.: Mashinostroenie, 1990, S. 13) consisting of a body inside which there are four rocker-crank mechanism interconnected gears and four firing pin attached to the sliders.

The disadvantages are considering forging device are: the impossibility of radial reductions with a simultaneous shift of the heads of one pair relative to the other pair or on any brisk; the impossibility of carrying out large Edirne to use when forging hydraulic forging press.

Known chetyrehballnoe forging device consisting of two brackets of the upper and lower forging dies with inclined surfaces, kinematically, with guide - links associated with them two brackets side Boykov with inclined surfaces corresponding to the inclined surfaces of the upper and lower holders and four strikers attached to the respective holders (see, for example, Japanese application No. 58-12088, class B 21 J 9/06, 9/02, 13/2, publ. 07.03.83).

It is also known chetyrehballnoe a forging device in radial forging installation consisting of two brackets of the upper and lower forging dies with inclined surfaces, kinematically connected with them two brackets side Boykov with inclined surfaces corresponding to the inclined surfaces of the upper and lower holders Boykov, using eight guides a U-shaped cross-section mounted on the side surfaces of the holders of the upper and lower heads, each of which, on the one hand is stationary on the side surface of the holder upper or lower striker, and on the other hand its inclined plane has a sliding contact with the inclined plane of the holder side striker and four God.).

A disadvantage of the known chetyrehvalkovoj forging device is that in the course of its operation possible jamming of the holders of the lateral strikers in the guide. This is possible due to the distortions inherent to this design of the device and due to hit the scale on the sliding surface, which in a large number accumulate near the bottom firing pin. The jamming device can lead to its destruction.

The basis of the present invention the task, by changing the design chetyrehvalkovoj forging device to eliminate the possibility of jamming of the holders of the lateral strikers in the guide and hit the scale on the sliding surface.

This object is achieved in that in chetyrehsetovom forging device consisting of two brackets of the upper and lower forging dies with inclined surfaces, kinematically connected with them two brackets side Boykov with inclined surfaces corresponding to the inclined surfaces of the upper and lower holders Boykov, using eight guides a U-shaped cross-section mounted on the side surfaces of the holders of the upper and lower heads, each of which, with adnani its inclined plane has a sliding contact with the inclined plane of the holder side striker and four strikers attached to the holders of strikers. What's new is that the inclined surfaces of the guides having movable contacts with the inclined planes of the other holders of the heads, are located at an angle 0-75° to the inclined surfaces of the holders of the heads and the lower holder striker between the substrate for mounting striker and inclined surfaces made of longitudinal grooves width, component (0.07 to 0.6)In, where In is the width of the lower holder striker beveled in the direction of the front surface, while in the lower part of the side holders Boykov installed scrapers or brushes based its working surfaces on the sliding surface of the holder bottom firing pin.

Patented chetyrehballnoe forging device illustrated by diagrams (Fig.1-4).

In Fig.1 presents chetyrehballnoe a forging device in a static state, a General view of Fig.2 - section a-a in Fig.1; Fig.3 - section b-B in Fig.1; Fig.4 - chetyrehballnoe forging device at the time of compression of the workpiece.

Chetyrehballnoe forging device consists of a holder top striker 1, the holder bottom striker 2, the brackets of the side of the heads 3, 4 Boykov 5-8, guides 9-12 (Fig.1). In the lower holder striker between the basis of the width of the lower holder striker beveled in the direction of the front surface of the device. Longitudinal grooves are designed to collect and remove scale, peeling off from the ingot or billet during forging. In the lower part of the side holders Boykov fixed scrapers or brushes 15, 16, designed to remove dirt and scale, falling in the process.

In the upper press plate 17 mounted on the walking beam of the press, and boulderites device 18 is mounted using provided for this press connections (Fig.1).

The holders 3, 4 lateral Boykov 5, 7 have inclined surfaces corresponding to the inclined surfaces of the holders 1, 2 of the top 6 and bottom 8 Boykov and kinematically connected with them through the guides 9-12, providing reciprocating motion of the holders of the sides of the heads (Fig.1, 4).

The inclined surfaces of the guides 9-12, having movable contacts with the inclined planes of the side holders Boykov 3,4, are angled=0-75° to the inclined surfaces of the holders of the heads (Fig.2).

The execution of the inclined planes of the guides having movable contacts with the inclined planes of the other holders of strikers, with anglesWhen the angle>75° possible precose holders side Boykov their jamming and breakage of the guides.

The dimensions of the longitudinal grooves 13, 14 for the accumulation and removal of scale depend on the width of the holder bottom firing pin (Fig.1. 3). Longitudinal grooves of a width of<0.07 In the forging process can quickly be filled with dross, and then this scale falls on the inclined surfaces of the holders of strikers that will lead to the bullies on these surfaces. Burrs on inclined surfaces which are sliding holders side Boykov, worsen the working conditions of the device, which ultimately leads to the necessity of repair by pereshlifovyvalsya inclined surfaces. In some cases, when you hit the scale on the sliding surface is possible jamming of the device.

Performing longitudinal grooves of a width of>0.6 is not appropriate, because in this case, increase the size of the device.

The bevels on the front surfaces intended for shedding of scale and to quickly remove her from the longitudinal grooves (Fig.3).

The operation of the device is as follows. When raising the movable beam press with the upper plate 17 up holder jaunty top side of the heads 3, 4, opening the workspace of the device (Fig.4). Then, the workpiece manipulator served in the active area of the device. After that include the working stroke of the press, in which its movable yoke moves the upper holder 1 striker with the striker b in the direction towards the workpiece 19 and together with the striker 8 compresses it in a vertical plane. At the same time, using the inclined surfaces of the upper holder striker 1 moves in the direction of the workpiece 19, the holders 3, 4 lateral Boykov 5, 7, which compresses it in radial and tangential directions. After the compression of the workpiece traverse the press moves up, revealing the device, and the compression cycle is repeated.

In the process of compression of the heated billet 19 scale falls in the lower part of the device, getting first in the longitudinal grooves 13, 14, and then the bevel rubbing on the tool table. Part of the dispersion in the process of forging billet descaling gets to open the sliding surfaces on the holder bottom striker 2. With these surfaces, the dross is removed using scrapers or brushes 15, 16 during movement of the holders of the sides of the heads 3, 4 down (Fig.4).

The proposed construction chetyrehvalkovoj forging device eliminates the possibility style="text-align:center; margin-top:2mm;">Claims

Chetyrehballnoe forging device containing two holders top and bottom heads with inclined surfaces, two holder side Boykov with inclined surfaces corresponding to the inclined surfaces of the upper and lower holders Boykov, kinematically connected with the said upper and lower holders Boykov using eight guides a U-shaped cross-section mounted on the side surfaces of the holders of the upper and lower heads, each of which on one side is stationary on the side surface of the holder upper or lower striker, and on the other hand its inclined plane has a sliding contact with the inclined plane of the holder side striker and four striker attached to the holders Boykov, characterized in that the inclined surfaces of the guides having sliding contact with the inclined planes of the other holders of the heads, are located at an angle 0-75° to the inclined surfaces of the holders of the heads and the lower holder striker between the substrate for mounting striker and inclined surfaces made of longitudinal grooves width, component (0.07 to 0.6)In, where In is the width of the lower holder striker with a scrapers or brushes, based its working surfaces on the sliding surface of the holder bottom brisk.



 

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FIELD: metal working.

SUBSTANCE: hard alloy matrix has casing, bushing pressed in the case and hard alloy insertion. Bushing has multifaced hole. Hard alloy insertion is composed by several sections made in form of trapezoidal-section prisms which have cut angles at their non-working edges. Number of sections corresponds to number of faces of item to be headed. Cuts of angles are made symmetrically to faces of working edge. Slits are made in several places of multifaced hole bushing at the ponts where faces cross each other.

EFFECT: improved resistance of matrix; simplified assembly.

3 cl, 1 dwg

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