摘要:
The invention relates to a process for forming hollow stepped shafts of cold-formable metal by internal high pressure with the following steps: provision of a tube outlet section and filling it with fluid; sealing at least the tube section to be widened; application of a suitable high internal pressure for widening the tube section; calibration of the workpiece by applying a high calibration pressure; maintenance of the calibration pressure while heading the tube along the longitudinal axis. Internal tools, also spring-loaded tools, are provided as supports in the tool.
摘要:
The invention concerns a deformation element for the controlled dissipation of energy with an inelastically deformable hollow part having at least one prefabricated depression (12) which acts as a predetermined buckling point when an impact having a force component in a direction perpendicular to the depression (12) is applied. The invention also concerns a method of producing this deformation element by: introducing or partially introducing into a mould a pipe which has optionally already been bent; applying internal high pressure; removing the reshaped part and optionally subjecting it to mechanical further or after-treatment, for example by laser or by honing. The invention further concerns the use of these deformation elements as lateral reinforcement pipes for vehicles, deformation elements between vehicle bumpers and side members, steering column elements, and supports.
摘要:
The invention concerns a method for assembling electroconductive parts by electric current heating. Said method is characterised in that it consists in moving forward electrodes (10, 20) with different polarities, towards the parts (30, 40) to be assembled, and in contacting said electrodes with at least one of the parts (30) to be assembled, current being applied to said electrodes (10, 20). Thus, the electroconductive parts (30, 40) are locally heated and assembled by the current flowing through them to pass from one electrode to the other. The invention also concerns a device for implementing said method and its use for assembling hollow parts, tubes or large dimension objects with sheet metal or other hollow parts.
摘要:
The invention concerns a method for assembling electroconductive parts by electric current heating. Said method is characterised in that it consists in moving forward electrodes (10, 20) with different polarities, towards the parts (30, 40) to be assembled, and in contacting said electrodes with at least one of the parts (30) to be assembled, current being applied to said electrodes (10, 20). Thus, the electroconductive parts (30, 40) are locally heated and assembled by the current flowing through them to pass from one electrode to the other. The invention also concerns a device for implementing said method and its use for assembling hollow parts, tubes or large dimension objects with sheet metal or other hollow parts.
摘要:
A framework, in particular an at least partially hollow framework, has nodes and members. The nodes (14) are formed by at least a projection (30) on a hollow framework member (12) and by at least a further hollow member mounted and secured thereon. Also disclosed is a process for producing this framework and its use in land, air and water vehicles, in building construction, in civil and underground engineering, scaffolds, shelving systems and furniture.
摘要:
The invention relates to a swing arm for moveably fitting wheels onto a support element, characterised in that it has at least two hollow arm parts (12, 14), hollow-moulded using the internal high pressure moulding method, optionally with variable cross-sections. One of said arm parts has a connecting projection which is inserted into and fixed in the end section of the other arm. The exterior diameter of the projection corresponds to the interior cross-section of the other arm part so that the arm part can be placed thereon.