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 turing spindle head:strength of the thread,chroming after removing margin

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

* External turning:Leave a 0.6-0.7mm tail

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

* Coarse grinding:Leave a 0.25-0.3mm tail

* Fine turning:Turing the area of welding position and thread.

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

* Turning welding scar：R>5mm。Promise arc connection between front earing and piston rod

* Fine grinding：Grinding to the size before chroming

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

* Chroming：Hard chrome plating,surface hardness HV900-1000. The salt spray test reached

* Polishing：Surface finish achieve Ra0.2-0.4