PL196878B1 - Milling head - Google Patents

Abstract

1. The milling head is equipped with a lower and an upper disc, the lower disc having grooves of a rectangular cross-section, characterized in that the upper disc (2) has grooves of an upper disc (3) with a rectangular cross-section, and in the grooves of the upper disc (3) and the grooves of the lower disc (4) there are knives (5) mounted, having catch elements (8) resting on stop pins (6) placed in holes made in the lower disc (1).

Description

(19) PL (11) 196878 (13) B1 (51) Int.Cl.

B23C 5/20 (2006.01)

B27G 13/12 (2006.01) (22) Date of filing: 31/07/2001

Patent Office of the Republic of Poland

(54) Milling head (43) Notification published: 10/02/2003 BUP 03/03 (76) Owner and inventor: Eugeniusz Grozik, Wrocław, PL (45) The patent was granted on: 29/02/2008 WUP 02/08

(57) 1. The milling head is equipped with a lower and an upper disc, the lower disc having grooves of a lower disc with a rectangular cross-section, characterized in that the upper disc (2) has grooves of an upper disc (3) with a rectangular cross-section, and in the grooves of the upper disc (3) and the grooves of the lower disc (4) there are mounted knives (5) having catch elements (8) resting on stop pins (6) placed in holes made in the lower disc (1).

PL 196 878 B1

Description of the invention

The subject of the invention is a milling head with replaceable cutting knives, intended especially for woodworking.

The milling head known from Polish patent application no. PL 342 910 has rectangular cross-section grooves in the lower disc, while the upper disc has a circular recess with a cylindrical surface against which the engaging elements of the knives placed in the grooves rest. Furthermore, the plane formed by the upper edges of the engaging elements is parallel to the plane formed by the upper edges of the knives.

The essence of the head is that the upper disc has rectangular cross-section grooves. The upper disc grooves and the lower disc grooves house knives with engaging elements that rest on retaining pins. The retaining pins are placed in holes drilled in the lower disc. Preferably, the axes of symmetry of the retaining pins and the axes of symmetry of the holes drilled in the lower disc align with the axes of symmetry of the lower disc's groove cross-sections.

In the second variant, the milling head has knife attachment protrusions placed in holes made in the lower disc.

The fundamental advantage of the milling head according to the invention is that mounting the replaceable knives is very simple and time-saving. Furthermore, the knife setting is very precise and does not require a special setting gauge. The milling head shown is made of two flat discs spaced apart by the width of the knife less the depth of the grooves in the upper and lower discs.

The subject of the invention is explained in the drawing, in which Fig. 1 shows the milling head in a broken cross-section A-A, when the lower edges of the catch elements and the upper edges of the knives lie in the same plane, Fig. 2 shows half of the head in a top view, Fig. 3 shows the milling head in a broken cross-section A-A, equipped with knives with catch projections.

Example 1

The milling head consists of a lower disc 1 and an upper disc 2, each of which has a hole in the center and three grooves cut out and spaced every 120° in the upper disc 3 and the grooves in the lower disc 4. The grooves 3 and 4 have a rectangular cross-section and are situated at an acute angle to the radial directions of the discs 1 and 2. In the grooves 3 and 4, there are plate knives 5 with catch elements 8, which rest on the stop pins 6 pressed into the holes made in the lower disc 1, wherein the axes of symmetry of the stop pins 6 and the axes of symmetry of the holes made in the lower disc 1 coincide with the axes of symmetry of the cross-sections of the grooves of the lower disc 4. The binder 7 provides additional protection against falling out of the stop pins 6. During operation, the discs 1, 2 with the knives 5 located between them are placed on the milling machine spindle 9, which centers the discs, and tightening the nut 11 of the spindle 9 puts pressure on the washer 10 and clamps the knives 5 between the discs 1, 2.

Example 2

The milling head is made as in the first example, with the difference that the knife attachment projections 12 are placed in the holes made in the lower disc 1.

Claims (3)

Patent claims 1. The milling head is equipped with a lower and an upper disc, in the lower one it has grooves of the lower disc with a rectangular cross-section, characterized in that the upper disc (2) has grooves of the upper disc (3) with a rectangular cross-section, where in the grooves of the upper disc (3) and the grooves of the lower disc (4) there are knives (5) with catch elements (8) resting on the stop pins (6) placed in the holes made in the lower disc (1). 2. Head according to point 1, characterized in that the axes of symmetry of the stop pins (6) and the axes of symmetry of the holes made in the lower disk (1) coincide with the axes of symmetry of the cross sections of the grooves of the lower disk (4). 3. Head, according to claim A device as claimed in claim 1, characterized in that knife engagement projections (12) are provided in the openings made in the lower disk (1).