Leaf Spring Making Machines

Hot Leaf Taper Rolling Machine Heavy Duty Shearing Machine Cambering Press Eye Rolling Machine
Double Ended Eye Grinding Machine Heating & Tampering Furnace
End and Centre Heating Furnace Automatic Quenching Tank with Conveyor Belt
Oil Pre-Heating  Pumping Unit Power Presses
Spring Scraging and Camber Testing Machine Brinell Hardness Testing Machine Endurance Testing Machine Shot Peening Machine

Hot Leaf Taper Rolling Machine


Features and Specifications:
- Two rollers of EN-8 Forged Steel fitted in Gun Metal Bushes with lubrication system 
- Bottom Roll of 10" diameter with 4 steps for bending by eccentric taper roll drive
- Top roll of 12" diameter 
- Eccentric drive shaft arrangement for the bottom roll through a eccentric cam. This squeezes the spring edges
- Main Gears made of EN-8 Forged Steel, machine cut and perfectly matched to give smooth running
- Drive through a 5 HP electric motor with necessary pulley and 'V' belts
- Provision given on the side for squeezing edges of flats

Heavy duty Shearing Machine


Features and Specifications: 
- Machine made of M.S. sections and flats. An all steel body, nut bolted and welded structure
- Used for cutting EN-45 steel spring flats
- Equipped with alloy hardened cutting blades
- Shaft and pinion are of forged steel. Gears of Cast Iron (hobbing machine cut)
- Speed: 38 strokes a minute
- Operation by clutch system, operated by a foot lever
- Drive through a 5 HP electric motor with necessary pulley and 'V' belts
- Capacity to cut maximum 200 mm wide x 20 mm thick EN-45 flats

Cambering Press


- All fabricated design
- Supplied with hydraulic power pack with 3 HP motor complete with 15 Tons hydraulic cylinder double acting, hydraulic pump, foot switch, limit switch, etc.
- Capacity maximum chambering length x width: 1800 x 100 mm
- Supplied with one set of die and punch for hot leaves chambering

- The downward Movement of the press is operated by a foot switch. On releasing the foot switch, the press goes upwards and stops at the position of the limit switch. By adjusting the position of the limit switch, we can control the stroke of the hydraulic cylinder. 
- The position of the bottom die can be lowered by fitting it in the additional holes provided on the side beams.

Eye Rolling Machine


- All fabricated design
- Supplied with quick lifting centre pin arrangement with hand operated lever
- Capacity maximum of leaf eye rolling 100 x 12 mm

- The machine should be installed on a concrete foundation close to the heating furnace. Hot end chambers / pre-bending of leaf spring should be done.
- After Hot end chamfering of lead on press, hot flat end should be reheated. Two Eye Rolling diameter pins should kept ready. One pin is used for eye rolling while the other pin cools in the water tank kept below the eye rolling machine. Corresponding to the pin size, the required bush is to be mounted on the Eye Rolling Machine. Please make all size pins and corresponding bushes as per your requirement. 

Brief Operation:
Put eye rolling pin in its position. Place the pre-bent portion of the hot leaf into the machine, tighten the clamping screw and manually push the pivot end of the machine using a long pipe. After completing 3/4th bend / eye, release the clamping screw and pull the pivot end of the machine to the starting point. Again clamp the screw and push the pivot end again to complete the eye. Release the screw and pull the pin upwards. Remove the eye using a hammer and die correct the eye size and Inside Diameter. Put this eye rolling pin in the water tank for cooling and use the other pin for the next rolling operation.

Double Ended Eye Grinding Machine


Features and Specifications:
- Two Cup wheel arrangement with central lever force arrangement to clamp eye centre position
- Both ends ground simultaneously
- Grinding Wheel Size: 12" x 4" x 4"
- Electric Motors: 3 HP x 2 nos.
- Eye Grinding Capacity: 125 x 80 mm
- Dimensions: 1.55 x 1.00 x 1.30 m
- Approx Weight: 1000 kgs. 

Heating & Tempering Furnace


Heating Furnace
- Furnace for heating leaves, having a maximum temperature of 1000 degrees centigrade
- Fire brick lining arrangement
- Furnace door: 3' Wide x 2' High x 6.5' Deep
- Double heated with oil fired burner
- 5 HP Blower
- Pyrometer (0 to 1000 degrees centigrade)


Tempering Furnace
- Tempering Furnace, having a maximum temperature of 400 to 600 degrees centigrade
- Furnace door: 3' Wide x 4' High x 6.5' Deep
- Pyrometer (0 to 700 degrees centigrade)

End Heating and Centre Heating Furnace


- Furnace for heating the ends of the leaf spring flats for making taper cut and for heating the centre of the leaf spring flats for making a dimple in the centre. 
- Furnace fitted with burner and blower.
- Furnace door: 3' Wide x 6' High, opening on both sides

Automatic Quenching Tank with Conveyor Belt


Quinching Tank

Features and Specifications:
- After hot cambering on the cambering press, the hot leaves are pushed into quinching oil tank and are cooled down on conveyors to room temperature. These leaves are then cooled in open air to give required hardness to the leaves
- With Oil Cooling Tower arrangement
- Electric Motors: 1 HP motor for circulating of quinching oil and 3 HP motor for movement of conveyor through reduction gear box.
- Supplied with quinching oil storage tank of capacity 8000 to 10000 liters
- Quinching oil is used for hardening of the leaf spring

Oil Cooler
- The machine comes with a reduction 4 HUD gearbox, 3 HP / 1440 RPM Motor. There are 4 sprocket wheels, which guide the chain and slats.
- The quenching oil tank is fitted with an electronic temperature gauge or temperature of oil. It is also fitted with an alarm which will sound if the temperature crosses 80o C or as preset on the thermocouple. The flash point of the quenching oil is 130o C hence, to avoid fire, it is essential that the temperature is maintained below 100o C. The optimum temperature for getting good results for hardening is 60o C to 70o C.

Oil Pre-Heating Pumping Unit


- This unit has a 3.5 kW / 3 Phase heater and 2 nos. 1 HP duplex motors
- Oil from storage tank goes to the heater of pumping unit and is heated up to 100 degrees centigrade
- Once the temperature is achieved, the oil is circulated through the pump unit 
- Complete oil pumping requirement of both the furnaces is done by this one unit 
- If there is a brake-down on one motor due to any reason, another pumping unit fitted at the same base is started to avoid production loss

Power Presses


- Pillar type all steel body press for cutting - pressing - embossing
- Capacity 50, 80 and 100 Tons
- Supplied with a suitable electric motor
- Supplied with suitable die and punch set for Champer Cutting / Cover Cutting / Dimple Forming / Chambering / Straightening / etc.


Spring Scraging and Camber Testing Machine


- Supplied with Hydraulic Power Pack with 2 HP motor
- Hydraulic cylinder double acting 10 ton capacity, 200 mm stroke
- 2 nos. track mounted trolley with 'V' notch with eye pin for length range 400 to 1800 mm
- All types of assembly springs can be scraged, chambered and corrected
- Buckling reverse test can also be done on the machine
- A vertical and horizontal scale indicator provided to reading chamber deflection

Brinell Hardness Testing Machine



- Brinell Hardness Tester is a production type machine designed for measuring the Brinell Hardness of steels and other metals that are flat, round or irregular in shape. The machine is sensitive, accurate and easy to operate.

- The machine consists of a ‘J’ frame, main lever, hanger, elevating screw, loading - unloading mechanism and damper system. The load is applied on the job through a ball indentor. It is applied through a lever mechanism. 

- The main lever carries three male vees one for hanger second for spindle shaft and third for pivot vee. The elevating screw can be moved up and down by rotating hand wheel. There are six detachable weight out of which four are each equivalent to 500 kgf and two are each equivalent to 250 kgf to be made use of for application of desired load in addition to the bottom weight equivalent to 500 kgf. The operating lever is provided for loading & unloading. 

- The damper system consists of main cylinder, piston, valve disc, connecting rod and metering valve. The damping sensitivity is adjusted by the metering valve. The connecting rod and piston is actuated through cam, mounted on cam shaft while operating.
Load range: 500, 750, 1000, 1500, 2000, 2500 & 3000 kgf.
Maximum test height: 254 mm
Depth of throat: 150 mm
Gross weight: 220 kg. (Approx.)
Height: 860 mm (Approx.)
Size of base: 495 * 255 mm (Approx.)

Endurance Testing Machine


The main purpose of Endurance Testing Machine is to test Leaf spring Assemblies for giving continuous jerks for the specified number of cycle for e.g. One Hundred Thousand strokes or more. This test gives us feedback on the life of leaf spring material, spring properties like camber and reduction in load bearing properties.

We can also plot graph of load v/s deflection of the assembly by taking note of the load cell reading in kilos & the deflection reading in mm on the scale provided.

Technical Specifications:
- Power Pack: Solenoid operated D. C. V., 12.5 HP motor, Hydraulic pump, Pressure 
gauge , Hose pipes, Water cooler
- Hydraulic Cylinder
-  Press Body: M.S. fabricated to withstand 15 Ton Max. load exerted by cylinder
- Load cell & indicator
- Stroke Counter: Proximity switch & display stroke counter
- Cycle on: Two proximity switches to control stroke length

Shot Peening Machine


Brief Description of the working of the machine: 

- Shot Peening machine is used for surface peening of leaf springs to give extra life to the spring. 
- The leaf spring is placed on the conveyor belt, which moves at a speed of 3 meters/minute. 
- In the main blasting chamber concave surface of the spring is bombarded with very high velocity shots. 
- The impact of the shots leaves a impinge impression on the surface which increases the fatigue life of the spring by 50%

Main parts of the machine:
Main chamber/ Blasting chamber: Here the spring is subjected to shot peening. The inner side is protected by liners made of rubber and M.S. Care has to be taken to see that the condition of the liner is inspected every week and necessary replacement be done wherever wear & tear is observed.
Shot Peening Wheel: Here the shots are thrown at very high velocity by the wheel and blades. Main parts for inspection are: Cage, Impeller, Blades, bare wheel, bearing assembly, V belts. The blades should be balanced to avoid vibrations and breakage.
Pneumatic Cylinder: This operates on compressed air, which is supplied through a solenoid valve. The main function is to start supply of the shots and stop supply when shutting off the machine.
Separator: This has a screen to separate the big unwanted particle, which may have accidentally entered the shots.
Bucket elevator: This conveys the shots from the bottom of the machine to the separator at the top. The bucket belt can be tightened by the screws at the top. The belt and the buckets have to be inspected every 15 days for wear.
Screw conveyor: This conveys the shots to the bucket elevator.
Main conveyor system: This conveys the leaf springs through the machine. There is a variable speed drive unit for controlling the speed of the belt.
Doors: They are provided for inspection of the liners in the main chamber. These are fitted with limit switches, which provide safety that the machine will not operate when the doors are open. 

Maneklal Global Exports
67 Bajaj Bhavan, Nariman Point, Mumbai - 400021, INDIA
Tel: +9122-22041340 / 41 / 42. Fax: +9122-22041389
WhatsApp: +918879795490
e-mail: sales@maneklalexports.com / maneklalexports@gmail.com / Enquiry Form

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