Factory quality coring in the workshop environment. Coring bracket for crosses
The cross journal jig is a fixture used with a press for quality assembly of “unassembled” cross shafts of passenger car and truck driveshafts after repairs. It was originally designed for repair shops specializing in the repair of universal joint shafts, but since then it is widely used also in the production of mass-produced universal joint shafts.
The fixture consists of a rigid housing with a guide bush and a bracket to compensate for the load on the PTO shaft yoke. A set of cores and stands (or jacks) is supplied with the bracket. The stands are installed in a hole in the bottom of the housing, which is coaxial with the guide sleeve at the top. This allows the cores to slide over the guide sleeve and be centered relative to the crosshead cup during assembly, ensuring that the cores are coreed without misalignment.
The stands serve two functions: to center the crosshead relative to the fixture and to limit the movement of the crosshead during assembly by determining its exact position in the driveshaft yoke.
Fitting a tool solves several problems:
- Ensures proper orientation of the core during assembly, reducing the risk of its breakage and creating conditions for a reliable non-disassembled connection;
- Compensates the load of the press on the fork of the driveshaft that allows to avoid its deformation and appearance of microcracks in it;
- Provides the correct orientation of the cross for assembly without distortion and determines its position relative to the axis of the shaft. Incorrect orientation can lead to shaft imbalance and rapid wear of the joint and holes in the driveshaft yoke;
- Can be used to disassemble the crosses to eliminate the possibility of damaging the surfaces of the driveshaft yoke or geometric deformation.
The device allows beginners to work without errors, and experienced professionals to increase the productivity of the cardan repair site.
Technological tooling for replacing stacked u-joints
- Centring housing for the punches.
- Set of 8 bits for punching crosses with diameters from 20 to 31 mm for drive shafts.
- Set of 4 bits for punching crosses with diameters from 15 to 19 mm for steering shafts.
