SU1602631A2 - Shears for cutting metal - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to the construction of scissors for cutting metal. The purpose of the invention is to increase the durability and cost-effectiveness of scissors due to the unloading of the power cylinders during their return stroke. By rotating the crank shaft 1, together with the crank 2 and the crank shaft 11, the opposite movement of the sliders 7, 8 is carried out in the guide frame 9. At the same time, the rods 4, 14 of the additional 3 and power 13 hydraulic cylinders are lowered. At the same time, the pressurized fluid from the sub piston space of the additional hydraulic cylinder 3 via pipeline 16 enters the sub piston space of the power hydraulic cylinders 13. The required pressure is created due to the excess of the fluid flow in the additional hydraulic cylinder 3 over the liquid flow in the power hydraulic cylinders. When the metal is clamped between the upper and lower sliders, it is cut by the continuous movement of the sliders under the total effect of the crank shaft 11 and the power cylinders 13 under the pressure of the fluid flowing into them. 2 Il.

Description

g / Igl + bjlJglLj. L. cosjej. / R + L 2iLccsiS ;; - L 2RLcos (Se ± jO /

de S, - total working area

power cylinders; R. - Radius of the main crank

crank shaft; L) - the length of the connecting rod; oig is the initial installation angle of the main crank shaft, counted counterclockwise from the axis of the connecting rod; () lj is the angle of rotation of the crank of the additional crank shaft from the initial position (the + sign corresponds to the direction of rotation against

clockwise, clockwise);

R is the radius of the crank of the additional crank shaft; L is the distance between the axis of the additional crank shaft and the axis of attachment of the additional hydraulic cylinder to the base; pi - the initial installation angle

crank on an additional crank shaft, counted counterclockwise from direct L.

In the initial position, the sliders are separated from each other. Cut the 1st metal into the gap between the sliders. The rotation of the crank shaft 1 together with the crank 2 and the crank shaft 11 is performed

0

five

0

15

50

55

the oncoming movement of the sliders 7, 8 in the directions of the frame 9. At the same time, the rods 4,14 of the additional 3 and power 13 hydraulic cylinders are lowered. At the same time, the pressurized fluid from the sub-piston space of the additional hydraulic cylinder 3 goes through the pipeline 16 to the sub-piston spaces of the power cylinders 13. The required pressure is created due to the excess fluid flow in the additional cylinder 3 above the hydraulic flow rates of the power hydraulic cylinders 13. The pressure level is regulated by a safety valve 19. The resulting excess fluid is discharged into the filling tank 17 through a pipe 18 through a safety valve 19. While clamping metal ezhdu upper and lower polzu- accomplished its cutting pro- dolzhayusch1 1SYA-P movement of the sliders at a total exposure of the crank shaft 11 and power cylinders 13 under the action of pressure fluid postupayugtsey therein.

After cutting the metal and overlapping the blades, the sliders 7.8 return to their original position. Streams 4,14 of the additional 3 and power 13 hydraulic cylinders are raised. Liquid from the over piston space of the power hydraulic cylinders 13 flows into the piston space of the additional hydraulic cylinder 3, filling it. Due to the inequality of the flow of fluid pressure in the cylinders is reduced to atmospheric. The lack of fluid is replenished from the tank 17 through the check valve 20

through pipeline 18.

i

The order of operations of the next cutting process is repeated in the specified sequence.

invention formula

Scissors for cutting metal according to ed. St. No. 1073012, o. imitating

ten

15

so that, from the purpose and economy of unloading power g, the period of the return xo is an additional curve with additional hydraulic capacity, additional shaft and base shaft, hydraulic cylinders are connected by pipeline and positive and reverse parallel to the filling capacitance of the hydraulic area S of the hydraulic cylinder you

.jElpl k;

| L1K + L - 2RLCOS -

de G)

R, the total working area of the power cylinders; radius of the crank of the main crank shaft 25; connecting rod length;

the initial installation angle of the main crank shaft, counted counterclockwise from the axis of the connecting rod; Ki is the angle of rotation of the crank of the additional crank shaft from the initial position (the sign corresponds to the direction of rotation versus 35

thirty

so that, in order to increase durability and efficiency due to unloading of the power cylinders during the return stroke, the drive is equipped with an additional crank shaft and an additional hydraulic cylinder with a filling capacity connected with the crank of the additional crank shaft and the base, the working cavities of the hydraulic cylinders are interconnected by a pipeline and by means of safety and non-return valves, installed parallel to each other, - with a filling capacity, with this, the working area S of the piston shall be completed nogo cylinder conditions selected from

five

five

R l

0

(

clockwise, sign - - clockwise);

the crank radius of the additional crank shaft; the distance between the axis of the additional crank shaft and the axis of the slug of the additional hydraulic cylinder to the base;

(the initial angle of the crank installation on the additional crank shaft, counted counterclockwise from the straight L.

n

Claims (1)

Claim Scissors for cutting metal St. No. 1073012, about. t l and h and w and w ¹ e I that, with increasing chain ™ durability and cost due to discharge power cylinders during the return stroke, the actuator provided with an additional crank shaft and the additional hydraulic cylinder having a supply container connected to the crank additional the crank shaft and the base, the working cavities of the hydraulic cylinders are interconnected by a pipeline and by means of safety and non-return valves installed parallel to each other with a filling capacity, while the working area S piston ny additional hydraulic cylinder is selected from the condition 'S h BliLiZ o' ~ l + Lf- 2R, L ₍ cos (l! _n , + οίϊ I where S is to, - total working area of power hydraulic cylinders; crank radius of the main 25 R - clockwise, sign - clockwise); crank radius crank shaft; crank shaft; h - connecting rod length; the initial installation angle of the main crank shaft, counted counterclockwise from the connecting rod axis; thirty ’L - the distance between the axis of the additional crank shaft and the axis of attachment of the additional hydraulic cylinder to the base; . (ύ - the crank angle of the additional crank shaft from the initial position (the sign corresponds to turn board against 35 o ( _o - initial. angle of installation of the crank on the additional crank shaft, counted counterclockwise from the straight line L. IN" Figure 2