Punch Press Machine: Development & Application

The development history of punch press:

1. Manual press:

Manual press

2. Manpower press:

Man Power Press

3. Power press:

power press

4. Auto punch press:

auto punch press

The application of the punch press:

Applications: Used for punching, cutting, drawing, and compression forming of metal materials.

Exclusions: Not suitable for fabrication of fragile materials such as cast iron, wood, glass, and ceramics, or flammable materials such as magnesium alloys.

The application of punch press

Features:

  • Best suited for mass production, not ideal for single productions.
  • High processing efficiency and high utilization rate of materials.
  • Must be used with a mold, and each mold can only be used to make one product.

I. Basic knowledge of punch press

1.1 brief introduction to press function:

★ The essence of the punch press is translating the circular movement into a straight-line motion.

brief introduction of punch press function

★ Function: Utilizes a transmission structure to generate the appropriate pressure and kinetic energy near the bottom dead center, in combination with a mold, causing the workpiece to undergo plastic deformation and produce the desired final product.

Punch press classification

Punch press classification as per the slider movement:

Punch press classification as per the slider movement

II. Structure

Punch press structure

Identification of punch points:

Identification of punch points

Crankshaft and eccentric gear

Crankshaft and eccentric gear of punch press

Crankshaft:

★ use when stroking < 400
★ low cost

Eccentric gear of punch press

Eccentric gear:

★ use when stroke > 400

★ high cost

2.1 C-type press structure introduction (crank single point)

C-type press structure introduction (crank single point)

C frame press component:

C frame press component

A1: Slider Component

C frame press balancer

A2: Balancer

C frame press die cushion

A3: Die Cushion

Punch drive structure plan:

Punch drive structure plan

2.2 C-frame press (crankshaft double point) structure:

C-type punch (crankshaft double point) structure

Teach you how to judge the crank punch:

  • Crankshaft corresponds to connecting rod–>Connecting rod outside
  • Crankshaft corresponds to guide post–>Guide column outside (The probability of being seen on the crankshaft closed punch is only 5%!)
C frame punch crankshaft and connecting rod

2.3 Closed (crankshaft single point) press structure:

Closed (crankshaft single point) punch structure
Closed (crankshaft single point) punch press slider and balancer

2.4 Closed (crankshaft double point) press structure:

Closed (crankshaft double point) punch structure

★ Integrated body & three split body

  • Integral body:

— Applicable table is relatively small, tonnage is relatively small;
— Tablet generally ≤ 2300 * 1250, tonnage ≤ 260T

  • Three split body

— Applicable table is relatively big, tonnage is relatively big;
— Tablet generally ≥2500*1400, tonnage ≥300T

Three split bodies: use 4 reinforcing rod to connect the upper, middle and lower sides to a whole.

reinforcing rod

Three split body punch press:

three split body punch press
punch press three segmentation

2.5 Closed (eccentric gear single point) press structure:

Closed (eccentric gear single point) punch structure
Closed punch eccentric gear and guide column

2.6 Closed (eccentric gear double point) press structure:

Closed (eccentric gear double point) punch structure

2.7 High-speed punch press

High-speed punch press

III. Punch press peripheral equipment

punch press decoiler, leveller, feeder equipment

Quick mold changing device: including the upper clamp die, the lower clamp dies, die lifter, die arm, hydraulic power units, etc.

IV. Punch press safety

For Personnel Safety:

(1) Machine Safety Design: Equipped with safety devices such as a two-hand operation device, emergency stop device, re-start prevention device, double solenoid valve, and chain devices.

(2) Safe Operation: Includes safety fencing, photoelectric safety devices, safety plugs and stops, alarms, and more.

Punch press safety device
Overload protection device

For Machine Safety:

(1) Overload Protection: In the event of exceeding the machine’s capacity, an overload protection device will stop to protect the machine.

(2) Thermal Relay Protection: Prevents damage to the motor due to excessive current.

Don't forget, sharing is caring! : )
Shane
Author

Shane

Founder of MachineMFG

As the founder of MachineMFG, I have dedicated over a decade of my career to the metalworking industry. My extensive experience has allowed me to become an expert in the fields of sheet metal fabrication, machining, mechanical engineering, and machine tools for metals. I am constantly thinking, reading, and writing about these subjects, constantly striving to stay at the forefront of my field. Let my knowledge and expertise be an asset to your business.

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