公开(公告)号：WO2021033039A1

公开(公告)日：2021-02-25

申请号：PCT/IB2020/056409

申请日：2020-07-08

Applicant: C.R.F. SOCIETÀ CONSORTILE PER AZIONI

Inventor： BASSAN, Daniele ,  SANDRI, Silvano ,  LONGO, Michele ,  PARADISO, Stefano ,  CARCIOFFI, Carlo

IPC: B62D23/00 ,  B62D27/02 ,  B62D27/06 ,  B29C64/00

Abstract: A motor-vehicle lattice frame (T) is described here that includes a plurality of structural nodes (N1, N2) each having a central body (1) and at least one hollow arm (2, 3, 4, 30) protruding from the central body (1). The lattice frame (T) also includes a plurality of beam elements (5, 6, 11, 27) connected to each other by means of the hollow protruding arms (2, 3, 4, 30). The structural nodes (N1, N2) are made by an additive manufacturing technique and at least one arm (2, 3, 4, 30) of one of the nodes (N1, N2 ) has an end portion opposite to said central body (1) having a channel shape (C) with an open cavity both at a front end (12) of the arm (2, 3, 4, 30) and along one side (13) of the arm (2, 3, 4, 30).

公开(公告)号：WO2014096988A1

公开(公告)日：2014-06-26

申请号：PCT/IB2013/055466

申请日：2013-07-04

Applicant: C.R.F. SOCIETÀ CONSORTILE PER AZIONI

Inventor： COLOSSEO, Marco ,  BASSAN, Daniele

IPC: B21D26/037 ,  B21D53/84 ,  F16C3/08

CPC classification number: B21K1/06 ,  B21D26/033 ,  B21D26/037 ,  B21D26/047 ,  B21D53/845 ,  B23P2700/02 ,  F01L1/047 ,  F16C3/02 ,  F16C2360/18 ,  F16H53/025 ,  Y10T29/49293 ,  Y10T29/49805

Abstract: Described herein is a method for obtaining a camshaft for an internal-combustion engine having a structure made of a single piece. The camshaft is obtained starting from a metal tubular element (1). The cams (1a) of the camshaft are obtained by expanding the tubular element (1) within a die (S1, S2) using high- pressure fluid. The tubular element (1) can have an enlarged thickness in the portions (1a) that are to form the cams. Forming with high-pressure fluid can be obtained using gas or liquid (for example, water or oil) at high pressure, at room temperature or at a higher temperature. The piece obtained is subjected to thermal treatment and to a grinding operation. In the case of hot forming, the piece may be already case- hardened following upon the forming operation using high-pressure fluid. It may be envisaged that the forming die comprises localized heating means to obtain case-hardening of the portions of the piece that are to constitute the cams following upon the forming operation.

Abstract translation: 这里描述了一种用于获得具有由单件构成的结构的内燃机的凸轮轴的方法。 从金属管状元件（1）开始获得凸轮轴。 凸轮轴的凸轮（1a）通过使用高压流体在管芯（S1，S2）内膨胀管状元件（1）而获得。 管状元件（1）可以在形成凸轮的部分（1a）中具有扩大的厚度。 在高压，室温或更高的温度下，可以使用气体或液体（例如水或油）来获得高压流体的形成。 将得到的片材进行热处理和研磨操作。 在热成形的情况下，在使用高压流体的成型操作之后，该件可以已经被表面硬化。 可以设想，成形模具包括局部加热装置，以在成形操作之后获得构成凸轮部件的部分硬化。