CS201808B1 - Interchangeable cutting plate particularly for milling - Google Patents

Description

SUMMARY OF THE INVENTION It is an object of the invention to provide a roughing die for use with face milling cutters

A significant increase in work productivity - when milling face milling cutters with interchangeable cut-outs, in many cases prevents jitter - jitters of inadmissible values and most often the jaws occur when milling less rigid workpieces with face milling cutters

In prior art face milling cutter designs and interchangeable cutterheads, this problem is solved by the most uneven spacing of the face milling teeth, or by the appropriate tool geometry realized by the choice of the positive cutter angles of 7L and the lesser cutting angle settings. edges X.

However, in many cases, even when using such tools and, the shaking of the impermissible values will not be pushed away, and it is necessary to proceed to reduce the cutting conditions, usually the depth of the cut, which is a negative effect. v.productive milling® Such tools then work temporarily at the edge of vibration, causing a substantial reduction in their shelf life by the ejection of embossing edges on exchangeable carbide cutting tools.

The above drawbacks and, in many cases, eliminate, reap - substantially mitigate the invention, which is based on the fact that on the back surface of the flat cutting edges a phase of the width of 0.2 - to 1.5 mm is formed, with the back angle of the phase of 201 201

201 808 of the cutting insert after clamping into the cutter body has a value of 0 ° to 1 °

Custom milling cutters fitted with interchangeable cutting inserts according to the invention have a markedly high anti-friction effect on the eco. Custom milling cutters used with the produced raw cutting inserts. This makes it possible to increase productivity by milling in those cases where the cutting conditions are limited by under-fat. machinery,

The subtle lowering of the level by the vibration of mm will in this case come about as a result of the fact that the non-back surface of the exchangeable cutting insert and the flat flat workpiece of the milling machine! they have, in principle, a surface contact, which in turn creates an increased friction mile, which has the effect of dampening the force of the oscillating movement. The tool el preserves the anti-friction properties and wear of the back surfaces of the removable cutting inserts, since wear of the abrasion increases the width of the phase, while maintaining its angle, the phase being virtually gradually replaced by a worn surface on the back surface.

He pushed the ripple of the stage growing with its width. As the increasing width of the raatle ej ela ella for machining, it is advisable to select the Phase Width as small as possible, but in such a way as to eliminate the occasional impermissible values.

In most cases, optimum results can be achieved, even if the phase width Jel · · 0.6+ 0.1 mm, the damping effect also depends! from the angle of the phasetet e, it is highest if the flow has a value that a surface contact between the milling surface and the cutting surface of the workpiece is ensured during milling. With increasing deviation of the phase angle from the flow to the optimum value, the attenuation of the ripple decreases.

In addition to the damping effect of the phase of the exchangeable cutting inserts according to the invention, it increases the shape strength of the cutting wedge, which, together with the reduced level of chvenle, has a substantially reduced grafting of the embossing edges in the morning. The resulting durability

in.

In the case of uncoated grades, the wear of the back surface is comparable with the durability of the co-produced inserts, since the wear intensity of the inserts according to the invention is notably reduced in the inventive coatings. The prior art exchangeable inserts for milling coatings do not have the optimum shape and therefore the results achieved with them are not satisfactory with the possibilities which provide high abrasion resistance of the coatings. The reason for this is that of replaceable cutting inserts for milling of coating occurs in the long part of the work of the tool due to the small contact area between the back surface of the punch and machined m with high pressure on the back surface of the cutting insert Therefore, the coating on the cutting insert and the abrasion of the abrasion-resistant coating is relatively quickly eroded and after the back wear to about VB-0.2 mm, the gray plate is blunted by an uncoated eye. Due to the surface contact of the workpiece phase e, the material pressure on the back surface of the cutting wedge has been several times lower since the start of the work, which corresponds to an increased coating life.

201 808

UVIfllflI Ч? ^{йу 1} ρβΛίβίπι iníimvv nn ^{dlnou jitter} and ⁿ * · · coatings ^that particularly sensitive Vadim ultimately dóeledku к niskolkonáeobne vyiiej durability.

The attached drawing shows a partial cross-section of a face milling cutter with interchangeable cutting edges according to the invention.

In the body of the milling cutter 10, the cutting plates 20 are clamped by a godly epic.

On the back surface of the cutting plate 21, a width 22 of the width f of 0.2 to 1.5 mm is formed at a back angle of 0 ° to 1 °.

The phase is also formed at the transition cutting edge 23. On the secondary cutting edge, the phase may be ole does not have to be formed. This means that a replaceable cutting insert is a phase formed either along the entire perimeter of the insert or only at the weed and transition cutting edges. With radius interchangeable cutting inserts, there is no need to grind the radius on the radius to increase the lifetime of the lift, the radius can be formed along the perimeter of the cutting insert

The non-back flat insert of the cutting insert according to the invention can be used in all types of cutting inserts for negative, positive and negative-positive geometry of face milling cutters.

Claims (1)

3 201 808 The present invention relates to non-sensitive coatings which, in consequence, result in a multiplicity of durability. BRIEF DESCRIPTION OF THE DRAWINGS In the accompanying drawing, there is shown a sectional view of a milling cutter with replaceable cutting inserts according to the invention. In the body of the milling cutter 10, the conventional inserts 20 are clamped in the usual manner. On the back flat cutting inserts 21, a width of 22 widths of 0.2 to 1.5 mm is formed under the back angle ε (0 ° to 1 °). That is, in the case of a replaceable cutting insert, the phase is formed either over the entire circumference of the insert or only on the main transverse edge edges. It is also possible to use the phase of the back surface of the replaceable cutting insert according to the invention in the case of larger types of rough cutters for the negative, positive and negative-positive geometries of the milling cutters. gray, not milled, characterized in that it is on the back flat outer edge edges A phase of 0.2 mm to 1.5 mm thick is formed, the back angle of the replaceable cutting insert phase is 0 ° to 1 ° after being clamped into the cutter body and cutter.