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.
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.
★ 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:
II. Structure
Identification of punch points:
Crankshaft and eccentric gear
Crankshaft:
★ use when stroking < 400
★ low cost
Eccentric gear:
★ use when stroke > 400
★ high cost
2.1 C-type press structure introduction (crank single point)
C frame press component:
A1: Slider Component
A2: Balancer
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:
— 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.
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.
Thanks! :)