Manufacturing

Technology

Detectability

Management System

科学严谨的工艺

Tube

* Stock preparation:Strict selection of high precision cold drawn pipe materials

* Double head machine:turining total length of the tube/grinding/fine turning the welding postion/processing oil port

* Welding:Weld accessories before honing to avoid cylinder deformation

* Honing:Honing should ensure the straightness and ellipticity of the inner hole

* Fine interior thread:The concentricity of fine internal thread shall not exceed 0.1mm.

* Welded back cover:Adopt professional automatic welding equipment to weld back cover and other accessories.

* Sand blasting:blasting can strengthen the adhesion of paint and ensure the quality of paint.

科学严谨的工艺

Piston rod

* Rough turning spindle head:Ensure the strength of the thread. Harden and temper after removing margin

* Externalturning:Leave a margin about 1.5-2.5mm

* Hardening and tempering:Heating to 800°, keep warm for 5 hours. The hardness is HRC22-28

* Semi-finished fine turning: external roundturning to machining allowance 0.8-1mm

* Welding : Automatic welding,flaw detection after keeping warm for 12 hours

* Medium freguency hardening:depth :1.5-2mm hardness :HRC45-52

* Coarse grinding:Leave a marginabout 0.25-0.3mm

* Fine turning:Turning the area ofwelding position and thread.

* Turning welding scar : R>5mm,Promise arc connection between frontearing and pistonrod

* Fine grinding : Grinding to the size before chroming

* Polishing :polishing.guarantee the rod's finish before chroming