Manufacturing Elements for Crane Components

The first part of the diploma thesis presented the company Palfinger d.o.o., discussing In the second, practical part of the diploma thesis, A comparison of all three above-mentioned procedures confirmed the correctness of their decision. It can be concluded that a company wishing to maintain competitiveness must, among other things, follow comprehensive solutions

Problem

The first part of the diploma thesis presented the company Palfinger d.o.o., discussing cutting technology, CAD-CAM programmes, and an example of CNC machine tool programming based on controllers such as Fanuc, Siemens, Heidenhain.

Solution and Method

In the second, practical part of the diploma thesis, machining of bearing seats on assembly components for cranes is presented, with emphasis on the issues of calibrating centre distance and determining reference points on CNC machine tools. Originally, a ** manual procedure with a dial gauge** was used for ** calibrating the centre distance** on the workpiece. The procedure was time-inefficient and the possibility of incorrect measurement relatively high, which consequently contributed to inaccurate machining and occasional scrap.

Therefore, they switched to using a measuring head with a PMG-20 probe, which achieved a time saving of 4 minutes per workpiece, but did not eliminate the possibility of measurement error and consequently the probability of products of inadequate quality. In machining on CNC machine tools, ** set-up time and** ** product accuracy** are important, among other things, so the machining technology was further improved by 'upgrading' the machine tools with dedicated measuring equipment by Renishaw RMP60.

The purposes of this automation were rationalisation of the procedure, reduction of time, increase in accuracy and efficiency of component machining.

Results

A comparison of all three above-mentioned procedures confirmed the correctness of their decision. It can be concluded that a company wishing to maintain competitiveness must, among other things, follow comprehensive automation solutions. In their case, it proved that optimal time and machining quality are ensured by combined effects such as appropriate measuring software tools, appropriate selection of technological machining conditions including optimal selection of the type and geometry of the cutting tool according to the material and geometry of the workpiece.