Máquina puncionadeira: desenvolvimento e aplicação

Punching machine: development and application

The history of the development of the punch press:

1. Hand press:

Manual press

2. Labor Press:

Human Power Press

3. Press the power button:

electric press

4. Automatic punching press:

automatic punch press

The application of punching machine:

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

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

The application of punching machine

Characteristics:

  • Best suited for mass production, not ideal for individual productions.
  • High processing efficiency and high material utilization rate.
  • It must be used with a mold, and each mold can only be used to make one product.

I. Basic knowledge of punching machines

1.1 brief introduction to press function:

★ The essence of the punching machine is to translate the circular movement into a rectilinear movement.

brief introduction to punch press function

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

Punch press classification

Punching machine classification according to slider movement:

Punch press classification according to slider movement

II. Structure

Punch press structure

Identification of drilling points:

Identification of impact points

Crankshaft and eccentric gear

Punch press crankshaft and eccentric gear

Crankshaft:

★ use when petting <400
★ low cost

Punch press eccentric gear

Eccentric gear:

★ use when stroke > 400

★ high cost

2.1 Introduction to the structure of C-type press (single point crank)

Introduction to C-type press structure (single point crank)

C frame press component:

C Frame Press Component

A1: Slider component

C Frame Press Balancer

A2: Balancer

C Frame Pressing Die Pad

A3: Matrix pad

Drilling rig structure plan:

Punch drive structure plan

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

C-type punch structure (double crankshaft point)

Teach how to judge crank punch:

  • The crankshaft corresponds to the connecting rod -> Outer connecting rod
  • The crankshaft corresponds to the guide post -> External guide column (The probability of being seen in the closed crankshaft punch is only 5%!)
C-Frame Driller Crankshaft and Connecting Rod

2.3 Closed press structure (crankshaft single point):

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

2.4 Closed press structure (double crankshaft point):

Closed punch structure (double crankshaft point)

★Integrated body and three divided bodies

  • Full body:

— The applicable scale is relatively small, the tonnage is relatively small;
— Tablet generally ≤ 2300 * 1250, tonnage ≤ 260T

  • Three divided bodies

— The applicable scale is relatively large, the tonnage is relatively large;
— Tablet generally ≥2500*1400, tonnage ≥300T

Three divided bodies: use 4 reinforcing rods to connect the upper, middle and lower sides into a whole.

reinforcement rod

Three-body split punch press:

three split body punch press
punch press three segmentation

2.5 Closed press structure (single point eccentric gear):

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

2.6 Closed press structure (double point eccentric gear):

Closed punch structure (double point eccentric gear)

2.7 High-speed punching machine

High speed punch press

III. Punch press peripheral equipment

punching machine uncoiler, leveler, feeder equipment

Quick mold change device: including upper clamping die, lower clamping die, die lifter, die arm, hydraulic power units, etc.

4. Punch press safety

For personal safety:

(1) Machine safety design: Equipped with safety devices such as two-hand operation device, emergency stop device, restart prevention device, double solenoid valve and current devices.

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

Punch press safety device
Overload protection device

For machine safety:

(1) Overload protection: If the capacity of the machine is exceeded, an overload protection device will stop to protect the machine.

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

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