DE102008004172A1 - Machine tool for spectacle lens blank, has work piece spindle pivotable around pivot axis for enabling necessary relative movement of cutting chisel and milling spindle in radial direction to rotational axis during machining of lens - Google Patents

Abstract

The tool (1) has a cutting chisel (4), a milling spindle (5) and a work piece spindle (3) arranged on a machine bed (2). The work piece spindle is pivotably arranged between the chisel and the milling spindle around a pivot axis (S1), whose direction components run perpendicular to a rotational axis (C1) of the work piece spindle. The work piece spindle is pivotable around the pivot axis for enabling necessary relative movement of the chisel and milling spindle in a radial direction to the rotational axis during machining of a lens (7) e.g. spectacle lens blank.

Description

The The invention relates to a processing machine for cutting Machining lenses with at least one machine bed on which at least a first tool, a second tool and a workpiece spindle are arranged with a rotation axis C1, wherein the first tool has at least one oscillation axis O1, wherein a directional component the oscillation axis O1 is parallel to the rotation axis C1.

It is already a device for milling and turning lenses from the DE 103 48 459 A1 known. The device has a machine bed, on which at least one tool holder and a workpiece spindle are arranged with a rotation axis as part of a workpiece holder, wherein the tool holder has at least one tool drive with an axis of oscillation parallel to the axis of rotation, wherein the workpiece holder in the direction of a translation axis relative to the tool holder is movable.

Of the Invention is based on the object, a processing machine such form and arrange that a space-saving arrangement of Axes and thus a good handling of the tools for Service is guaranteed.

Solved The object is achieved according to the invention in that the workpiece spindle between the tools about a pivot axis S1 is arranged pivotably, wherein at least one directional component the pivot axis S1 is perpendicular to the rotation axis C1 and the workpiece spindle for the purpose of warranty the during the processing of the lens not agile relative movement of the tool in the radial direction to the rotation axis C1 around the Swivel axis S1 is pivotable. This ensures that the workpiece spindle or the workpiece holder the workpiece spindle for varying the respective processing position on the respective tool arcuate or circular movable is. The arcuate pivoting movement becomes simultaneous while processing the lens for warranty the relative movement in the radial direction of the lens inserted between the tool and the lens. The while the processing associated with the pivoting about the pivot axis S1 proportionate displacement of the workpiece in the direction of the respective Translational axis T1 or oscillation axis O1 is used in the calculation considered the surface. The lens becomes thus on the workpiece spindle to the respective Tool brought up without it an additional space-filling translational axis required. The lens is under consideration the distance to the pivot axis S1 on a circular path B1 displaced arranged. Due to the existing translation axis T1 of the workpiece spindle may be the radius of the circular path B1 or the distance between the lens and the tool can be varied as desired. Thus are also during the pivoting deviations from the circular path B1 possible.

Advantageous It may also be that the tools with respect to the circumferential direction the pivot axis S1 arranged on a curved or circular path B2 are. According to the on the workpiece spindle due to the pivot axis S1 and the existing translation axis T1 existing circular motion area for the Lens are the tools due to their arrangement on the sheet or circular path B2 in the work area of the workpiece spindle placed. Depending on the size and training of each Tool is a Bo genbahn deviating provided by a circular path. When arranging the tools or the respective tool tips it is important that the work area of the tools to the adapted annular workspace of the workpiece spindle is. The angular position of the respective tool axis occurs not in the first place.

Further It may be advantageous that the workpiece spindle between 90 ° and 270 °, in particular 180 ° around the Swivel axis S1 is pivotable. The translation axis T1 of Workpiece spindle ensures that the workpiece or the lens in the respective working area of the respective tool can be brought. It also ensures that the for the machining of the workpiece necessary movements, especially executable for milling are. Using the translation axis T1, it is also possible in the pivoting about the pivot axis S1, the distance between to vary the workpiece and the respective tool, so that the workpiece moves deviating from the circular path becomes.

Advantageous It may also be that the workpiece spindle and the tools relative to each other in the direction of a translation axis T1 movable are arranged and the workpiece spindle in the direction of Translationsachse T1 is movable, wherein at least one directional component the translation axis T1 is parallel to the axis of rotation C1.

It may advantageously be provided that the first tool is designed as a turning tool and the second tool is designed as a milling spindle with a rotation axis R1. The combination of turning tool and milling spindle ensures the fastest possible processing of plastic lens blanks. With the Frässpin del is a fastest possible rough section below Ensuring a maximum chip volume possible. With the help of the turning tool the generation of a high-precision and very smooth surface is possible.

For this It may be advantageous that a trained as a turning tool third tool is provided. The second turning tool ensures the production of special surface shapes, those of the usual toric form or open space form differ.

Further advantages and details of the invention are explained in the patent claims and in the description and in the 1 shown.

A processing machine 1 has a machine bed 2 on, on the next to a pivotally arranged workpiece spindle 3 three tools 4 . 5 . 6 and a workpiece changer 11 are arranged. The workpiece spindle 3 is pivotable about 90 ° about a pivot axis S1 and thereby at least in four positions I . III . IV . II on a circular arc B1, so the first tool 4 , on the second tool 5 , on the third tool 6 and in a parking or operating position P on the workpiece changer 11 placeable. The workpiece spindle 3 has in addition to the pivot axis S1, a rotation axis C1 and a translation axis T1, whereby the workpiece spindle 3 in the respective position I - IV to the respective tool 4 . 5 . 6 . 11 can be moved away from or away from this. About the pivot axis S1 and the translation axis T1 of the workpiece spindle 3 can the lens 7 on the circular arc B1 between the positions I - IV in the area of the respective tool 4 . 5 . 6 or the workpiece changer 11 be moved, with the distance between the lens 7 and the pivot axis S1 can be varied as desired.

The three tools 4 . 5 . 6 are arranged on a curved path B2 such that the respective tool or the respective tool tip 4.1 . 5.1 . 6.1 in the working area of the workpiece spindle 3 is placeable. During the processing, the circular arc path B1 and the circular path B2 coincide at least locally. At the first tool 4 and the third tool 6 it is a turning tool with a high-frequency oscillation axis O1, O2, while the second tool 5 as a milling spindle with a rotation axis C1 and a milling head 5.1 is trained.

The processing machine 1 has four side walls or sides 1.1 - 1.4 on. At the back third page 1.3 is a control cabinet 9 and on a right fourth page 1.4 is a conveyor belt 8th intended. The access for an operator or the operating position P is located on the front first side 1.1 ,

The arrangement of the tools 4 . 5 . 6 on the circular arc B2 ensures the handling thereof from the operating position P on the front side 1.1 , The milling spindle 5 has the longest service life and is located farthest in relation to the operating position P in the area of the second or third side 1.2 . 1.3 ,

Because of the milling spindle 5 the most chip volume is generated is the milling spindle 5 in the area of the second page 1.2 arranged. The milling spindle 5 is tilted with respect to the image plane tilted. Also on the second page 1.2 is therefore a chip container 10 intended for chips and coolant residues.

The conveyor belt 8th is located on the fourth page 1.4 in the area of the workpiece changer 11 , The four sides 1.1 - 1.4 are thus optimally used.

1

processing machine

1.1

first Side, front side

1.2

second Side, left side

1.3

third Side, back side

1.4

fourth Side, right side

2

machine bed

3

Workpiece spindle

4

first Tool, lathe tool

4.1

tool tip

5

second Tool, milling spindle

5.1

milling head tool tip

6

third Tool, lathe tool

6.1

tool tip

7

Lens, workpiece

8th

conveyor belt

9

switch cabinet

10

span container

11

Workpiece changer, Tool

I

position

II

position

III

position

IV

position

B1

Bow- or circular path

B2

Bow- or circular path

C1

axis of rotation

O1

oscillation

O2

oscillation

P

operating position

R1

axis of rotation

S1

swivel axis S1

T1

translation axis

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10348459 A1 [0002]

Claims (6)

Processing machine ( 1 ) for machining lenses ( 7 ) with at least one machine bed ( 2 ) on which at least one first tool ( 4 ), a second tool ( 5 ) and a workpiece spindle ( 3 ) are arranged with a rotation axis C1, wherein the first tool ( 4 ) has at least one oscillation axis O1, wherein a direction component of the oscillation axis O1 runs parallel to the rotation axis C1, characterized in that the workpiece spindle ( 3 ) between the tools ( 4 . 5 ) is arranged pivotable about a pivot axis S1, wherein at least one direction component of the pivot axis S1 is perpendicular to the rotation axis C1 and the workpiece spindle ( 3 ) in order to ensure that during the processing of the lens ( 7 ) necessary relative movement of the tool ( 4 . 5 ) is pivotable in the radial direction to the rotation axis C1 about the pivot axis S1. Processing machine ( 1 ) according to claim 1, characterized in that the tools ( 4 . 5 ) are arranged with respect to the circumferential direction of the pivot axis S1 on a curved or circular path B2. Processing machine ( 1 ) according to claim 1 or 2, characterized in that the workpiece spindle ( 3 ) between 90 ° and 270 °, in particular 180 ° about the pivot axis S1 is pivotable. Processing machine ( 1 ) according to claim 1, 2 or 3, characterized in that the workpiece spindle ( 3 ) and the tools ( 4 . 5 ) are arranged movable relative to each other in the direction of a translation axis T1 and the workpiece spindle ( 3 ) is movable in the direction of the translation axis T1, wherein at least one direction component of the translation axis T1 extends parallel to the rotation axis C1. Processing machine ( 1 ) according to one of the preceding claims, characterized in that the first tool ( 4 ) is designed as a turning tool and the second tool ( 5 ) is formed as a milling spindle with a rotation axis R1. Processing machine ( 1 ) according to one of the preceding claims, characterized in that a third tool designed as a turning tool ( 6 ) is provided.