SHARMA MACHINE TOOLS
Knuckle Joint Presses

Knuckle Joint Presses

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KUNCKLE JOINT LEVERAGE

Forming techniques is greatly modernized, many products which were produced by conventional methods can now be produced on knuckle Joint Presses more economically to close tolerances thus eliminating subsequent machining. These presses are designed for work requiring slow, powerful presses close to bottom stroke, suiting to work involving coining, embossing, extruding, beading, sizing and swaging operations.

Knuckle Joint Presses have virtually eliminated use of expensive machines for subsequent operations by producing components to close tolerances and these machines can be equipped with automatic feeding devices to facilitate material handling and speedy production.


Regarding press cycle, from production point of view idle stroke is driven at high speed until mould touches material and forming takes place at slow speed exerting full rated machine capacity. The sketch will show the differences of moving curved lines of knuckle Joint press and an eccentric press, where stroke length is same, the dwell increases efficiency and accuracy of formed components.


The Knuckle type drive of presses thus develops considerable power and tremendous mechanical advantage near bottom stroke. Slide adjustment is easily accomplished by taper wedge placed on upper portion of Knuckle mechanism either manually or with motive power at extra cost.

Frame

Consist of two or several members assembled by tie bars made of special steel and shrunk in position.

Crankshaft

Forged from solid billet is machined and ground all over and runs in two bronze bearing which is well lubricant from centralized system.

Clutch & Brake

Low inertia multidisc clutch and brake is used for transmitting power to the machine. Wear adjustment is compensated by little additional movement of inbuilt air cylinder.

Counter Balance

Slides are counter balanced by pneumatic cylinders to eliminate any possibility of its running ahead of specified speed and also to counteract possibility of rebound due to bottom ejector.

Safety

All presses are equipped with pneumatically operated safety controls with provision of single and continuous stroking, inching and two hand operation.

Standards with Machine:

A. Lubrication
B. Knock out device in slide
C. Knock out at press bed
D. Plain bolster plate.

STANDARD SPECIFICATION OF KNUCKLE JOINT PRESS
MODEL No. PKC-100 PCK 160 PCK 250 PCK 400 PCK 600 PCK 800 PCK 1000
Frame Type Unit frame Unit frame Unit frame Unit frame Unit frame Unit frame Unit frame
Running Type Gear
Running
Gear
Running
Gear
Running
Gear
Running
Gear
Running
Gear
Running
Gear
Running
Capacity Ton 100 160 250 400 600 800 1000
Slide Stroke (Standard) mm 70 100 120 140 140 150 150
Number of Stroke (Standrad) s.p.m 60 50 40 40 35 30 30
Adjustment Of Slide mm 15 15 15 15 15 15 15
Shut Height mm 300 350 370 400 400 450 450
Thickness Of Bolster mm 75 75 100 120 120 150 150
Area Of Bolster mm 400x450 450x500 500x600 550x650 600x700 650x800 750x950
Area of Slide mm 300x300 320x320 350x400 400x500 450x550 450x550 550x650
Main Driving Motor kw 5.5 7.8 11 15 22 37 45
Slide Adjustment Motor kw Hand
operation
0.75 1.5 1.5 2.2 2.2 2.2
These Under Showns Items have Been Manufactured by Our Knuckle Joint Presses