DE102020129155A1 - Milling device for milling a slot in a workpiece - Google Patents

Abstract

A milling device for milling a slot in a workpiece, with an end milling cutter (2) which is held on a support (1) and can be driven in rotation, the support (1) being movable in the axial direction of the end milling cutter (2) and transversely thereto, is designed in this way that the support (1) is connected to a rotatable eccentric (7).

Description

The invention relates to a milling device for milling a slot in a workpiece according to the preamble of claim 1.

Such milling devices are used, for example, to form slots in a door leaf to accommodate box locks in industrial door production, with these slots being made in a narrow side of the door leaf.

According to the genus, the milling device has an end mill which is held on a support and rotates in operation, which dips into the door leaf through a corresponding movement of the support in the axial direction and then cuts the slot transversely thereto through a corresponding movement of the support up to a final dimension mills.

A disadvantage of using this milling device, however, is the relatively long processing time for producing the slot, which stands in the way of an optimized, efficient production, especially since door leaves processed in this way are mass-produced in large numbers.

The industrial use of the milling device also means that it can be positioned in a stationary position, ie it can be part of a production line.

However, the use of such milling devices is not limited to the above-described production of a slot for a box lock in a door leaf, but can be used wherever slots have to be made in materials made of wood, a wood material, metal, plastic or the like.

The invention is based on the object of further developing a milling device of the generic type in such a way that it enables faster processing with structurally simple means.

This object is achieved by a milling device having the features of claim 1.

Due to this structural design of the milling device, the processing time when making a slot is significantly reduced compared to the prior art.

It has been shown that a slot in a comparable configuration can be made up to three times faster than in the prior art, which of course represents a significant manufacturing advantage.

This results in cost optimization, which is a goal that is always aspired to, especially from a business point of view.

In addition, the new milling device can be realized with little outlay in terms of production engineering, since only two drives are required, namely on the one hand to drive the eccentric and on the other to drive the rotary end mill.

The functional principle of the new milling device is based on the fact that a rotary movement of the eccentric takes place in a linear movement of the support both in the axial direction of the end milling cutter and transversely to it.

For this purpose, linear guides are provided in the form of guide rails, by means of which the support, depending on the pivoting position of the eccentric, is immersed in or pulled out of the workpiece or the material is cleared out by transverse movement.

The eccentric can be configured in different ways, with a disc shape or configuration as an arm in the sense of a crank being particularly advantageous, with the pivot axis being mounted at one end.

The movements of the support, i.e. the traversing dimensions, in particular the traversing dimension in the transverse direction, is preferably computer-controlled and dependent on the corresponding slot dimension.

A further advantage of the invention is the compact design of the new milling device, which, due to the low masses to be moved, allows the eccentric and thus the support to move extremely quickly.

In addition, the milling device can be preassembled as a structural unit, so that it can be easily connected to existing processing machines, which is possible with little assembly effort.

As mentioned, the travel distances of the support are programmable, as is the speed of the eccentric, which also depends on the dimensions of the slot to be milled.

Structurally, the pivot axis connected to the support on the one hand and the eccentric on the other hand can be mounted so that it can rotate on one side, specifically by means of a plain or roller bearing.

One-sided means that the pivot axis is mounted either on the support or on the eccentric, while the other end area of the pivot axis is firmly connected to the associated component.

Further advantageous developments of the invention are characterized in the dependent claims.

An embodiment of the invention is described below with reference to the accompanying drawings.

• 1 eine erfindungsgemäße Fräsvorrichtung in einer perspektivischen Ansicht
• 2 die Fräsvorrichtung in einer Seitenansicht
• 3 die Fräsvorrichtung in einer Vorderansicht
• 4 die Fräsvorrichtung in einer schematischen Draufsicht.

Show it:

• 1 a milling device according to the invention in a perspective view
• 2 the milling device in a side view
• 3 the milling device in a front view
• 4 the milling device in a schematic plan view.

In the figures, a milling device for milling a slot in a workpiece made of wood or a wood-based material, for example, is shown.

For this purpose, an end mill 2 that can be driven by a motor 3 is held on a support 1, the support 1 being movable in the axial direction of the end mill 2 and transversely thereto.

According to the invention, the support 1 is connected by means of a pivot axis 8 to an eccentric 7 that can be rotated by a drive 9, the pivot axis 8 being positioned at a distance from a drive axis 10 of the eccentric 7 in which 1 marked with "X".

The direction of rotation of the eccentric 7 is in the 1 and 4 marked with "R" and an arrow.

Especially in the 4 It can be seen that the eccentric 7 is mirror-symmetrical with respect to the drive axle 10 in order to achieve a mass balance at the high speeds at which the eccentric 7 is pivoted.

The linear movement of the support 1 is achieved by longitudinal rails 6 in the axial direction of the end mill 2 and transversely thereto by transverse rails 5, with which the rotational movement of the eccentric 7 is brought into linear movements of the support 1.

The drive 9, with which the eccentric 7 is driven, is held on a base plate 4, as well as blocks 11, which carry both strips 12 and the longitudinal rails 6 in the axial direction, the transverse rails 5 being fastened to the strips 12 in the transverse direction .

reference list

1

support

2

end mill

3

engine

4

base plate

5

cross rail

6

longitudinal rail

7

eccentric

8th

pivot axis

9

drive

10

drive axle

11

Desire

12

strip

Claims (9)

Milling device for milling a slot in a workpiece, with an end milling cutter (2) which is held on a support (1) and can be driven in rotation, the support (1) being movable in the axial direction of the end milling cutter (2) and transversely thereto, characterized in that the support (1) is connected to a rotatable eccentric (7). milling device claim 1 , characterized in that the support (1) is connected to the eccentric (7) by means of a pivot axis (8) arranged at a distance from a drive axis (10) of the eccentric (7). milling device claim 1 or 2 , characterized in that the support (1) is movable on longitudinal rails (6) in the axial direction of the end mill (2) and on transverse rails (5) transversely thereto. Milling device according to one of the preceding claims, characterized in that the end mill (2) can be driven via a motor (3) held on the support (1). Milling device according to one of the preceding claims, characterized in that several longitudinal rails (6) and transverse rails (5) are arranged parallel and at a distance from one another. Milling device according to one of the preceding claims, characterized in that the eccentric (7) is of mirror-symmetrical design in relation to the drive axle (10). Milling device according to one of the preceding claims, characterized in that a base plate (4) is provided, on which the eccentric (7) is mounted. Milling device according to one of the preceding claims, characterized in that the pivot axis (8) is mounted on roller or sliding bearings. Using a milling device claim 1 for introducing a receiving slot for a case lock in a door leaf.

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