Punch Press Machine: Development & Application | MachineMFG

Punch Press Machine: Development & Application

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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.

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