Bend Test According to customer requirement

Application:

Piston rod is mainly used in hydraulic pneumatic, engineering machinery, automobile manufacture with the piston rod, guide pillar plastic machinery, packaging machinery, printing machinery, roller, textile machinery, transportation machinery with axis, linear motion with the linear optical axis.

Specification:

Precision Piston Rod Steel Hollow Shaft
Material	All kind of brass,copper,stainless steel etc...
Specification	Outer diameter(mm)	Inner diameter(mm)
	50-300mm	40-250
	Length	200-600m (Customers usually choose the 300~500m)
Straightness	1/1000
ID roughness	RA 0.4micron(max)
Service	Custom

Process Flow.

1). Process flow of hydraulic piston rod.

Connecting rod using 35 steel, processing technology: cold-drawn forming a turning a continuous medium frequency induction hardening, a cylindrical grinding, a fine grinding cylindrical a fine grinding cylindrical shearing section.at finishing a plating chromium to hydrogen tempering shearing section.at fine grinding.In order to improve the surface quality and corrosion resistance of piston rod, super finishing process was added before chrome plating.

2). Piston rod plating process.
Inspection before plating - pack hanging fixture - chemical degreasing, electric lift oil - water - activation pickling - water washing- the moment, the piston rod chromium plating, recycling water - water washing - unloading hanging fixture - inspection

Manufacturing process description:
1. Hydraulic shear cutting
2. CNC machining + additional broaching and milling operations
3. Induction hardening at a range of different frequencies and powers
4. Rotary straightening
5. Proportionally servo controlled CNC grinding
6. Leading edge technologies for hard chromium,
7. Dehydrogenation and tempering
8. Wet polish and superfinish polish with 100% surface condition control
9. Export Packaging

Packing Of Piston Rod

Each rod will be oil treatment first , then separate by layer and layer , one by one .Each small box use VCI bag to protect from rust , then box into wooden pallet .The weight and size can be made according to customer requirement .

Metal material