| 摘要 |
A joint assembly 11 comprises a hollow extrusion member 12 of an asymmetrical hexagonal section and a flange casting 13 comprising a base flange 31 and several webs including a top web 33 and upper side webs 34, 35 which have joint faces 33A, 34A, 35A presented to corresponding joint areas on the outside of the extrusion 12 while a bottom web 36 and lower side webs 37, 38 have joint faces 36A, 37A, 38A which are presented to corresponding joint areas on the inside of the extrusion. To assemble the joint assembly 11, an adhesive is applied to the joint faces 33A, 34A, 35A, 36A, 37A, 38A. The extrusion 12 is then aligned with the flange casting 13 but offset vertically. The extrusion 12 is then moved longitudinally towards the flange casting 13 to the full extent permitted by abutment of an extrusion end face 14 with steps 35B, 37B to bring the joint faces 33A, 34A, 35A, 36A, 37A, 38A into overlapping alignment with the corresponding joint areas on the extrusion 12, there being a substantial clearance (Fig.3) due to the vertical offset so that the adhesive on the joint faces does not contact the joint areas on the extrusion at this stage. Then the extrusion 12 is moved transversely relative to the flange casting 13, i.e. upwards as seen, so that each joint face 33A, 34A, 35A, 36A, 37A, 38A complete with the adhesive is brought into contact with its corresponding joint area on the extrusion 12. Holes are then drilled or pierced and blind rivets inserted, the self-tightening action of the rivets helping to ensure full contact of the adhesive with the joint areas. The assembly of extrusion 12 and flange casting 13 is then placed in an oven to cure the adhesive. <IMAGE> |
