TOK Joint Shaft Quality Appreciation
Joint-type constant velocity cardan joint belongs to high-precision steering bearing, it is the key part in transmission system. And its function is to deliver motive power of motor from gear box to four tyres, and then drive sedan at a high speed. Therefore, it is required to possess high precision and many crafts compared. Its general production process is as:
[TOK ® Process: Steel products]:
The national standard CF53 # bearing steel and 20CrMnTi and 20Cr. After these steel products are forged, they will have a hard and wear-resisting surface and tenacious inside. Characterized by good rigidity, high strength, tensile strength, anti-torque, good wearing resistance and higher toughness.
[TOK ® Process: Semi-finished product]:
Using precision cold forging extruded mould of 1600 tonnage, which not only reduced deformation and quality changes occurred under a high temperature, and hence guarantee of compaction of the internal organizational compositions; But also ensure that the semi-finished materials through cold extrusion can have compact organization and high density.
[TOK ® Process: Surface fine-turning process]:
Surface fine-turning process. Using Japanese, Germany, Korean and Taiwanese full computer CNC automatic processing center carries out both rough and fine turning on the entire surface of joint. The center positions full computer automatic knife exchanging, so can realize processing in both inside and outside to make it and ensure that three points at top, in middle and at bottom of the product can be concentric, so that joint can match with all parts in a close manner. During using process, it has low noise, shall not shiver, and have high security.
[TOK ® Process: Roll gear (external spline), pull gear(internal spline)]:
The precision of roll gear directly affect stability of transmission shaft, gear-box and chassis and conformity between gears. TOK uses Japanese imported CNC gear hobbing machine, combining with Japanese original precise hob, can process high precision gear (modulus, pressure angle and gear shape are precise, no phenomena like biased gear and folding gear). Can closely match with the gears of the gear-box and wheel shaft, to improve the transmission efficiency and reduce noise.
[TOK ® Process: Heat treatment]:
This kind of method for heat treatment using automatic high and medium frequency induction solution and overall carburizing quench is characterized by high hardness and wear resistance (products per batch produced by TOK can do metallographic analysis and ultraviolet detection test).

[TOK ® Process: C. V boot]:
Using Japanese and Taiwanese imported neoprene, which has performances such as oil resistance, high and low temperature resistance (-40° C -130° C), ozone resistance, acid and alkali resistance and so on, meanwhile, has high tensile strength and gas tightness.
[TOK ® Process: Lubricating oil]: What adopted by TOK is Sinopec shell advanced Molybdenum Disulfide Lithium-based Grease, so it is fine and smooth. When using, it will has strong effect of resistance to abrasion, compression resistance, low and high temperature resistance and lubrication.