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.
Consist of two or several members assembled by tie bars made of special steel and shrunk in position.
Forged from solid billet is machined and ground all over and runs in two bronze bearing which is well lubricant from centralized system.
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.
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.
All presses are equipped with pneumatically operated safety controls with provision of single and continuous stroking, inching and two hand operation.
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 |
|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|
|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 |