The Development and Application of Punch Press Machine

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 punch press:

  1. Applied to metal’s punching, cutting, drawing and compression forming
  2. Not applied to the fabrication of fragile material (cast iron, wood, glass, and ceramics) and flammable materials (magnesium alloy)

The application of punch press

Features:

  1. Suitable for mass production, not suitable for single production.
  2. High processing efficiency, high utilization rate of materials;
  3. Must be used together with the mold, and a 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: make the use of transmission structure, so that the machine produces the appropriate pressure and kinetic energy near the bottom dead center, together with the mold to make the workpiece resulting in plastic deformation to get the desired workpiece.

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 die, die lifter, die arm, hydraulic power units, etc.

IV. Punch press safety

1. For the safety of personnel:

(1). Machine designed safety device: two-hand operation safety device, emergency stop device, and re-start prevention, double solenoid valve, chain devices and so on.

(2). Operating: safety fence, photoelectric safety devices, safety plugs and safety stop, alarm, and so on.

Punch press safety device

2. For the safety of the machine itself

Overload protection device

1. Overload protection device: If the use of capacity beyond the capacity of the device itself, there will be overload to stop, to protect the machine.

2. Thermal relay protection device: to prevent damaging the motor by the too large current.

That it!

2018-01-17T10:03:59+00:00 Punching|

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