Description of the invention

The present invention relates to an attachment connector member.

The invention herein is advantageously used in the mechanical manufacturing industry, particularly in the field of the machine tools for the metal parts processing, the following description will explicitly refer thereto without losing generality for this reason.

As it is known, a machine tool operating in the mechanical manufacturing industry for the metal parts processing, is essentially formed by a bearing bed for motorisation members capable of moving in rotation a mechanic mandrel, the selected coupled processing tool is mounted thereon.

To allow for an effective connection being provided with high rigidity and optimal motion transmission between the mentioned mandrel and tool, it is known the use of an attachment connector member capable of being rigidly interposed between the mandrel and the tool body so to mechanically connect them. The aim of the present invention is to implement an attachment connector member being optimal and with both high rigidity and stability and being capable of allowing the use interchangeability with different types of processing tools.

A further aim of the present invention is to implement an attachment connector member that allows in particular to allow for the execution of effective machining for the chips’ removal. A further aim of the attachment connector member herein is to guarantee the execution of optimal processing even with high force torsion components.

A further aim of the attachment connector member herein is furthermore to allow for a high costs reduction because it needs easy grinding actions for its implementation.

The structural and functional properties of the present invention and its advantages compared to the known prior art will be even more evident from the claims below, and, particularly, from an examination of the following description, done with reference to the attached figures, exhibiting some preferred but not limiting embodiments of the attachment member herein, where: figure 1 is a perspective, enlarged scale view of a first preferred embodiment of the attachment connector member herein, in the present invention; figure 2a is a top plan view of the connector member of figure 1 ; figure 2b is a bottom plan view of the connector member of figure 1 ; figure 3 shows, in a section view, the connector member of figure 1 engaged into a mandrel and into a tool of a machine tool for the metal parts processing; figure 4 is a perspective, enlarged scale view of a second preferred embodiment of the attachment connector member herein, in the present invention; figure 5 is a perspective, enlarged scale view of a third preferred embodiment of the attachment connector member herein, in the present invention; figure 6 is a perspective, enlarged scale view of a fourth preferred embodiment of the attachment connector member herein, in the present invention; figure 7 is a perspective, enlarged scale view of a fifth preferred embodiment of the attachment connector member herein, in the present invention.

With a specific reference to the attached figure 3, with E the attachment connector member is globally referred to, capable, in use, of being engaged, interposed, in a machine tool MO for the metal parts processing, specifically between a base B of a mandrel M of the machine MO and a tool body U.

According to what better illustrated in the figures 1 , 2a and 2b, the member E includes a cylindric central body 1 , being provided with a series of cross-notches 2, which, from each other opposite bands, in relation to said central body 1 , an upper engaging portion 3 (“masculine component”) and a lower engaging portion 4 (“feminine component”) branch there-off.

According to what illustrated in the preferred embodiment of the figures 1 , 2a, 2b and 3, the upper engaging portion 3 shows a substantially truncated or truncated cone trigonal configuration 100, and it is capable of being engaged, in use, in the mentioned base B of the mandrel M.

The mentioned upper engaging portion 3 being furthermore provided with a hollow central hole 5.

According to the alternative embodiment illustrated in figure 4, the engaging portion 3 shows a substantially truncated cone configuration 101 , and furthermore the body 1 being furthermore provided at least with a dihedral notch 102, two recesses 103 with a rectangular section and each other opposing concavities and a cylindric peripheral recess 104.

According to the alternative embodiment illustrated in figure 5, the engaging portion 3 shows a substantially cylinder-truncated or truncated cone configuration 105 being provided with an end cut 106, and the body 1 being furthermore provided with at least a notch 107, of a rounded recess 108 and of a cylindric peripheral recess 109.

According to the alternative embodiment illustrated in figure 6, the engaged portion 3 shows a substantially cylindric-truncated configuration 1 10 being provided with a hole 1 1 1 for a fastening key nut 1 12, and the body 1 being furthermore provided with a cylindric peripheral surface 1 13 without recesses.

According to the variant of the alternative embodiment of figure 4 and shown in figure 7, the body 1 being furthermore provided with a cylindric peripheral surface 1 14 having a recess 1 15.

The lower engaging portion 4 includes a first portion 6a exhibiting a truncated or truncated cone trigonal configuration 1 16, a second portion 6b with a cylindric end configuration 1 17 branching there-off, being capable, in use, of being engaged in the mentioned tool body U.

The mentioned lower engaging portion 4 being furthermore provided with a hollow centrale hole 7, two cross notches 7a and 7b (figure 2b) branching there-off for a fastening key nut of a metal ring 8a capable of closing a threaded tension rod 8b.

The mentioned holes 5 and 7 being communicating, and centrally arranged and axial in relation to member E to allow for the passage and the circulation of a coolant inside the said member E.

In the end it should be noted that the above-mentioned member E being preferably but not limitedly made of steel, or in aluminium alloys, and with various hardness levels, chosen depending on the processing use.