Introduction

Kejetherm Metal Gathering Machine is fully hydraulically operated with Resistance Heater.

Principle of Operation

Metal Gathering operation consists of heating the part of the job and pushing the remaining cold material of the job into hot zone till the required metal gathering takes place.

Advantages

• By employing Metal gathering many of the well known technical limitations and disadvantages of mechnical upsetting can be overcomed.
• Simultaneous heating and forming in one machine.
• Almost unlimited gather in one operation. The mechanical upsetting limitation of about 3 x dia. no longer applies. The modern engine valve has an upset length of up to 20 x dia. and lengths of upto 40 x dia. are commonly electro-upset.
• No longitudinal flash is formed such as is unavoidable in a split-die mechanical upsettler.
• No waste of heating energy or material. Outside of the upset volume can be precisely controlled to allow subsequent, "flashless" forging in closed dies.
• Always ready for instant use, no warm up period.
• Energy efficient, about 0.35 - 0.40 kwh / kg.
• Minimal scaling because of simultaneous heating and gathering. Improved die life in subsequent forging operations.
• No environmental pollution by emission of heat, fume or exhaust gas.
• Free upsets can be finished forged without re-heating and so save time and energy.
• Consistant heating temperature through the use of thyristor control.
• Optimal grainflow and fault free surface. The unheated bar length remains unchanged.

INTRODUCTION

The Electric Resistance Heating is the least expensive way to change electricity into heat in any metallic object. In a furnace, the entire furnace has to be heated, the elements have to be heated, which in-turn many times heat a muffle which in turn heats the part in which heat is desired. Resistance heating is a more direct method of producing heat only in the object in which heat is needed.

Applications

Just a few of the applications would be; wire drawing, extruding, warm or hot heading, brazing, forging, upsetting, roll parts, heat treating, heating strip stock for shearing, for forming, drawing and rolling, soldering and general purpose heating.

APPLICATION :- REQUIRED FOR COOLING COPPER

ELECTRODES , TRANSFORMERS

SECONDARY,THYRISTORS STACK, HYDRAULIC OIL

ETC.

Application Includes Forging Of Allen/Hex Bolts , Valves

And Other Auto Components

Range :- 50 Tons To 400 Tons.

In Both Versions Up-Stroke As Well As Down-Stroke.

Heavy Duty Hydraulic Presses For

Forging , Forming , Bending Applications

Range :- 10 Tons To 300 Tons

Auto U Bolt Heating Anf Forming Machines

Supplied with auto feeder, heating at centre, bending (Pneumaticallly) of forming (Hydraulically) and final bending for U shape.

Production rate: 1200 nos. to 2000 nos. per shift

Torsion Bars

Comprises of metal gathering (upto 150 Kva) and forging in horizontal hydraulic press upto 150 tons and can handle basic diameter upto 40 mm alongwith clamping and upsetting dies/punches.

Electro Brazing Machine, 10 Kva Carbide Tips In Drill Rods, Copper To Copper, Silver Tips,etc..

Machines Can Be Made Upto 200 Kva

Tennon Riveting 30 Kva For Welding / Rivet Heading Of 'T' Section In "Z" Section Of Window Manufacturing.

Continuous Wire Heater 50 Kva Generally Available With Straightening . Pre Heating For Bolt Heating / Nut Headings Upto 16 Mm Wire Dia.

Induction Ring Heater 75 Kva At Supply Frequency For Flanges., Starter Rings For Resizing And Stress Relieving Bearing Recesses For Expansion And Fitting.

Higher Kva (Upto 250 Kva )

Application

Include Railway Tyres

Heating Elements 15 Kva For Annealing With Water Sprinkles To Form In Various Shapes And Coils.

Electric Resistance Heating Machine 200 Kva For End / Centre Heating For Leaf Springs For End Coiling And Centre Punching Used For Suspension In Auto Industries.