SU1279726A1 - Automatic cold-upsetting machine - Google Patents

Abstract

The invention relates to the field of mechanical engineering, namely to the design of equipment for metal forming. The purpose of the invention is the expansion of technological capabilities by increasing the duration and magnitude of the pressure pulse. A cold-heading machine contains a high-pressure chamber connected by channels with working hydt. roll cylinders. In each of these channels, a nozzle with a through hole is installed, the longitudinal profile of which is determined by the calculated dependence. In this case, a jet is formed that provides optimal characteristics (pressure pulse pulses. 2 Il.

Description

The invention relates to mechanical engineering, in particular to the design of equipment for metal forming.

The purpose of the invention is the expansion of the technological capabilities of the cold-cooling machine by increasing the duration and magnitude of the pressure pulse.

Fig. 1 shows a diagram of the proposed automaton with the position of the shock piston in the output and operating position; figure 2 - nozzles.

The machine contains engine 1 mounted on the frame, kinematically combined with the rotary table 2 and the material feed mechanism 3, as well as through the flywheel 4, the clutch 5 and the crank-connecting rod mechanism 6 -. with a hydraulic hammer mechanism consisting of a movable rod 7, a shock piston 8, a receiver 9, a cylinder 10 and a barrel 11.

In the lower part of the barrel 11 there is a high pressure chamber 12, which is filled with liquid. Chamber 12 is connected by channels with working hydraulic cylinders 13, the rods of the latter are equipped with punches 14. Pneumo-hydroaccumulator 15 is connected to pinholes I6. Working hydraulic cylinders 13. The rod end of the barrel 1 is connected to the atmosphere by openings. The high-pressure chamber 12 is filled and filled with liquid through the openings 17. Through these openings, excess liquid in the high-pressure chamber goes to the drain. Between the high-pressure chamber 12 and the working cylinders 13 there are nozzles 18, which form a hydropercussion wave.

The nozzle hole profile is calculated using the formula

I r

g

g

current profile radius;

distance from the end of the nozzle from the side of the high pressure chamber, O t x; nozzle length; radius of the nozzle from the side

cameras;

nozzle radius on the opposite side of the camera. The AT operates as follows. Before starting, the high pressure chamber 12 is filled with liquid up to the level of the drain opening 17, and a compressed gas is pumped into the receiver

the required pressure, the pneumohydroaccumulator 15 is filled with liquid and compressed gas.

When the motor 1 is turned on, the rotation is transmitted through the flywheel 4

crank mechanism 6, which cocks the shock piston 8 of the lower position to the top, while compressing the compressed gas in the receiver 9. After the crankshaft 6 of the upper dead point passes the top dead center, the rod 7 together with the shock piston 8 accelerates under the action of the compressed gas and blow emits a fluid that generates a high pressure pulse in it, which

0 through nozzles 18 is transmitted to the piston cavities of the working cylinders 13, which perform the required work by the punches. In this case, a hydrostatic wave is generated, which ensures the maximum pulse duration, pressure and impact force of the working pistons. The fluid from the rod end of the working hydraulic cylinders 13 is moved to the pneumohydroaccumulator 15,

compressing the gas in it.

The wire is fed by the feed mechanism 3 into the dies to the desired length and when the table 2 is rotated, it is cut, then transferred to the position of processing and ejection.

When raising the lower plane of the shock piston 8 Bbmie orifice 17, the high-pressure chamber communicates with the atmosphere and the gas pressure in the pneumatic accumulator 15 returns the working pistons to their original position. Then the cycle is repeated.

The economic effect of implementing the invention is achieved by expanding technological capabilities.

Formula of Invention

A cold-toping automaton containing high-pressure chamber mounted on the frame and working hydraulic caps connected to it by channels, a shock piston located in said chamber, coupled to one end of the rod, the other end of the latter connected to a plunger, and the working piston of this

The rod is located in the power cylinder connected to the receiver, characterized in that, in order to expand the technological capacity by increasing the duration and size of the pressure pulse, it is equipped with channels installed in the channels connecting the high-pressure chamber with working cylinders, nozzles with through holes mi, the profile of each of which in the longitudinal section is determined by dependence

g (

g.

-current profile radius;

- distance from the end of the nozzle from the side of the high-pressure chamber, O x

- the length of the nozzle;

g

radius of the nozzle from the side

cameras;

g

radius nozzle with protivopog-.

false side of the camera.

ag.2

Claims (1)

Claim A cold heading machine containing a high-pressure chamber mounted on the bed and working hydraulic cylinders connected to it by channels, a shock piston located in the chamber, articulated with one end of the rod, the other end of the latter connected to the cocking mechanism, and the working piston of this rod placed in the power cylinder, connected to the receiver, characterized in that, in order to expand technological capabilities by increasing the duration and magnitude of the pressure pulse, it is equipped with channels unifying the pressure chamber with the working cylinders, nozzles with through holes, each of which profile, in longitudinal section defined dependence DT | G -’- ~ G where g is the current profile radius; 5 x — distance from the end face of the nozzle from the side of the high-pressure chamber, 0 <x <ί; ί - nozzle length; g ₍ - radius of the nozzle from the side 10 cameras; τθ is the radius of the nozzle on the opposite side of the chamber. , 1279726 Phil. 2