CS264063B1 - Tool for forming hollow blanks - Google Patents

Abstract

The tool is arranged in such a way that it can also be used for the production of smaller series on conventional hydraulic presses. After its adjustment, it is suitable for large sizes of the processed tubular blank. The lower part of the tool consists of a movably mounted support bracket, which forms a tub, which is filled with oil and is arranged above the press table, the lower forming mandrel is anchored in the press table, arranged in the working chamber and coaxial with the upper forming mandrel, at least four extendable retaining pins pass through the press table, abutting on the support bracket and resting on the ejector ram of the press, while clamping pins are connected to the ejector ram of the press for closing the left part of the straight part of the lower part of the tool. In a plane perpendicular to the plane of the lower forming mandrel. Two regulating pressure cylinders with piston rods are arranged opposite each other, and the piston rods are assigned braking cylinders Γ'^.Υ, movable in the desired direction inside the tubular blank.

Description

hollow oolotovar

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The tubular hollow components of the tubular blanks of the mouth are dripped.

nuuas.uae and i tool; Expensive is currently carried out on a special purpose. -They are presses financially for these devices are very complex and

These disadvantages are eliminated by the tool, according to the invention.

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the lower forming mandrel is anchored in the working connection r-n * <'·' - p,> -, -> a - ^u o · -> Vh · κ_. · J - ~ i. ~. ·. L _ v · A -g?

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264 063 according to the invention, in which two pressure cylinders are arranged in jury in a plane perpendicular to the axis of the mandrels of the forming mandrel; the piston rod, the wading pistons movable in ocde.dovmodm are associated with the piston rod. direction towards. pipe and o 1 o t o v o r ·

The bridgehead of this ndetro. ': Die i; ro vráo ?. meuoříck se

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264 063

The left and right portions of the working chamber 25 form a cavity corresponding to the desired fitting 24. The lower forming mandrel 26 is anchored into the working chamber 25, which is anchored in a base plate 27 _|

The tubular blank 1 is loaded after opening the upper and lower parts of the tool. After sealing the tubular blanks 1 with the mandrel 4 and the lower mandrel 26, the entire working space is filled with oil 12 and the upper working cylinder 4 is vented. At the same time, the overpressure piston 6, clamped to the pulling ram 3, moves to produce the desired overpressure in the workpiece blank 1. The pressure gauge n is shown by the pressure gauge 28. At the same time as the upper working cylinder 4, The ram 11 and exerts a force H on the tubular blank via the upper forming mandrel. In order to ensure a uniform flow of material to the bulged portion of the tubular blank 1 during forming, the entire support bracket 13 slides to the starting position a.

If it is necessary to brake the molded part of the tubular blank 1 during forming, the brake piston 16 is used. The amount of pressure exerted on the brake piston _16f is controlled from the pressure control cylinder 14 via the piston rod 15? The desired fitting 24 is moved through the ejector ram 21 and the clamping pins 23 into the final position b and open the left part of the lower part of the tool and the right part of the lower part of the tool by the piston rod 15.

The present arrangement can be used primarily on conventional hydraulic presses.

Claims (1)

Tool for forming hollow blanks, consisting of an upper and a lower part, the upper part being provided with an upper forming mandrel operated by a press holders and an overpressure piston clamped to the pulling ram, and in the lower part there is a working chamber with a cavity , corresponding to the desired fitting, characterized in that the lower part of the tool consists of a movably mounted support bracket (13) which forms a tub which is filled with oil (12) and is given savings. above the press table (20), in the press table (20) is anchored a lower forming mandrel (26) arranged in the working chamber (25) and coaxial with the upper forming mandrel (5), at least four extendable holding holders pins (22 ·) abutting the support bracket (13) d resting on the ejector ram (21) of the press, the pin ejectors (23) connected to the ejector ram (21) for closing the left and right lower parts tool parts. The tool according to claim 1, characterized in that two control pressure cylinders (14) with piston rods (15) are arranged opposite one another in a plane perpendicular to the axis of the lower forming mandrel (26), the piston rods (15) being associated with brake pistons. 16) movable in the desired direction relative to the tubular blank (1).