Are you looking to learn about the incredible history and applications of the punch press? Look no further!
The development of this powerful machine has come a long way, from manual presses to the highly efficient auto punch press. But what exactly is a punch press, and what can it do?
This versatile machine is capable of punching, cutting, drawing, and compression forming metal materials, making it a must-have for mass production.
However, it’s important to note that fragile materials such as cast iron, wood, glass, and ceramics, or flammable materials such as magnesium alloys, are not suitable for fabrication using this machine.
If you’re interested in learning more about the structure and classification of punch presses, as well as the safety measures required to operate them, then this article is for you.
With detailed explanations of the various punch press structures and peripheral equipment, you’ll gain a comprehensive understanding of this powerful machine.
So, buckle up and get ready to dive into the fascinating world of punch presses!
The development history of punch press:
1. Manual press:
2. Manpower press:
3. Power press:
4. 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.
- 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.
★ 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 as per the slider movement:
Identification of punch points:
Crankshaft and eccentric gear
★ use when stroking < 400
★ low cost
★ use when stroke > 400
★ high cost
2.1 C-type press structure introduction (crank single point)
C frame press component:
A1: Slider Component
A3: Die Cushion
Punch drive structure plan:
2.2 C-frame press (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%!)
2.3 Closed (crankshaft single point) press structure:
2.4 Closed (crankshaft double point) press structure:
★ Integrated body & three split body
- Integral body:
- 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.
Three split body punch press:
2.5 Closed (eccentric gear single point) press structure:
2.6 Closed (eccentric gear double point) press structure:
2.7 High-speed punch press
III. Punch press peripheral 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.
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.