Model Size	Height H(mm)			Common Maximum Travel(mm)	Compression Max. Outside Diameter (mm)	Standard height, approximate value at 0.49MPA internal pressure					Maximum Internal Pressure (MPA)	Internal Pressure Failure(MPA)
Model Size	Design Height	Max. Height	Min Height	Common Maximum Travel(mm)	Compression Max. Outside Diameter (mm)	Effective Area(cm2)	Volume(L)	Load(KN)	Dynamic Spring Constant(n/mm)	Natural Vibration Frequency(Hz)	Maximum Internal Pressure (MPA)	Internal Pressure Failure(MPA)
F-240-4	206	316	111	±80	300	450	10.1	22.2	235	1.6	0.88	2.9-3.9
F-240-3	152	232	82	±60	300	450	7.3	22.2	324	1.9	0.88	2.9-3.9
F-240-2	98	148	53	±40	300	450	4.4	22.2	520	2.4	0.88	2.9-3.9
F-240-1	72	110	40	±30	340	450	3.5	22.2	765	2.9	0.69	2.9-3.9

What is a Punch Air Spring

1. Basic functions
Buffering and shock absorption: When the punch press works at high speed, it absorbs the impact force when the slider and the mold come into contact, reducing vibration and noise.

Pressure control: By adjusting the air pressure, it provides stable pressure output to meet the needs of different stamping processes (such as punching, stretching, etc.).

Protect the mold: Reduce the damage to the mold caused by impact and extend the life of the mold.

Precise control: Cooperate with the CNC system to achieve precise adjustment of stroke and pressure to improve processing quality.

2. Structure and working principle
Structure: It is mainly composed of cylinder, piston, seal, air pressure regulating valve, etc., and is filled with compressed air.

Working principle:

Compression stage: When the punch press slider moves downward, the air spring is compressed, the air pressure increases, and energy is stored.

Release stage: When the slider returns, the compressed air expands, pushing the piston to reset, assisting the slider to return quickly and buffering vibration.

3. Core advantages
Adjustability: The elastic force can be changed by adjusting the air pressure to meet the needs of different materials and processes.

Fast response: more sensitive than mechanical springs or hydraulic systems, suitable for high-speed stamping.

Easy maintenance: no complex mechanical structure, low failure rate, can be repaired by replacing seals.

Energy saving and environmental protection: compared with hydraulic systems, no oil is required to avoid pollution and energy consumption.

4. Application scenarios
Stamping industry: used for precision stamping of automotive sheet metal, electrical housing, hardware, etc.

Continuous punching: ensure stability in high-speed punching machines (such as progressive die stamping).

Stretch forming: provide uniform blanking force to prevent material wrinkling.

5. Selection points
Load requirements: select the load capacity of the air spring according to the punching force.

Stroke length: match the movement stroke of the punch slide.

Air pressure range: ensure that the air source pressure is compatible with the rated pressure of the spring.

Installation size: needs to be compatible with the punch structure.

The Related Picture of F-240-4

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