DE1299491B - Automatic post-form milling machine for contour machining of flat workpieces such as glasses frames etc. like - Google Patents

Description

1 2

The invention relates to a post-form milling machine A b b. 2 shows a side view, partially in vertical section for plane workpieces, in particular spectacle frames,
and the like A b b. 3 a floor plan when applying the

It is known that the scanning of templates for the direction of processing closed inner outlines,

the mentioned purpose using one of 5 Fig. 4 a plan using the

Handlebars worn in a certain area, post-forming device on the machining of external

movable head with similar scanning and outlines.

Milling device by moving the head of On a stationary base plate 1 sit on side-hand perform. In this case, however, the button must be placed at a distance and parallel to each other for two transverse periods on the template. With io guides 2. They contain an outer, longer duration of this handling slackens the box-shaped, upwardly open part 3, its attention and the button is no longer constantly cheeks 4 on their upper half to inward exactly applied to the template and there are protruding prisms 4 'with inclined surfaces he-reject workpieces generated. In addition, the total depends, as well as an intermediate rail 5, on whose work success in terms of number of pieces of the speed 15 pages the cheeks 4 in their lower half by means from, with which the worker is attached to the circumference of the Scha screws 5. The two Querfühblone drives around. Shortages of workers 2 are also evident on the base plate 1 by means of the restricts the number of workpieces. Screws 7 fastened. In each of the lead outside

It is also a post-form milling machine with a part 3 is a guided part 8, its

a stylus and a milling cutter carrying cross ao cross-section the clear cross-section of the outer

slide with drive via a drivable shaft and guide part 3 minus spaces for

with one each fixed to the machine frame. On the

bound holder for template and workpieces be top 8 'of the inner guide part 8, which a

knows, wherein the cross slide carrying the milling cutter protrudes slightly over the top 4 ″ of the cheeks 4 is

Via a rotatable shaft, depending on a 95, an intermediate plate 10 is fastened by means of screws 11.

Template can be driven. stigt. Above the two cross guides 2 is a

According to the invention, the longitudinal guide 12 is arranged on the end face of the attachment and consists of the same

Drive shaft for the compound slide consists of a disk fixed parts like the cross guides, with the

arranged, with a the axis of the drive shaft difference that the same in the direction of height

intersecting guide groove for receiving one in 30 are arranged reversed. The outer guide part

Groove direction under the action of a spring 13 contains cheeks 14, which to the inside prism

Slide block, which / supplements an axially parallel to the drive men 14 ', and on its upper half on the

shaft arranged pin, which are fastened in a on the intermediate rail 15 with screws 16.

Upper slide of the cross slide arranged in the outer part 13, which is one that is open at the bottom

Radial bearing is performed. 35 box is also an inner part 18 and between

The sliding block and its two needle bearings 19 are arranged by the compression spring. The inner part Pin always in the direction of the groove of the grooved washer 18 protrudes a little with its underside 18 'below the pushed and thereby, mediating the radial underside 14 "of the cheeks 14. It is by means of screw bearings and the cross slide, the follower pin ben 20 on the top of the intermediate plate 10 fastened in the direction of the guide groove radially on the 40 stigt. The inner parts 8 of the transverse edge located below the fixed stencil pressed and guides 2 and the inner part 18 of the above the rotary movements borrowed in the same way longitudinal guide 12 are thus through the movement of the grooved disc around the template - intermediate plates 10 crosswise rigidly seduced with one another and thus the shape of the stencil by means of tied. As a result, the longitudinal guide 2 is under Verder milling device 45 carried by the cross slide by means of the rigidly connected inner guide the fixedly clamped workpiece is divided over 8 and 18 in the outer guide parts 3 of FIG wear. lower guides 2 across and on their own,

It is no longer necessary to move the stylus from the inner guide part 18 longitudinally, so it can To put your hand on the template and to accommodate one of these two movement components. This work is now carried out automatically, executing the resulting movement. on table. The permanent contact of the button on the outer part 13 of the upper guide 12 is a No scrap workpieces can be attached to the template plate 21 by means of screws 22. On the develop. The time of driving around the template is plate 21, there is a follower pin 23 with follower roller 23 ', now through the speed of rotation of the groove that protrudes into a scanning template 24, which disks determined, which is much larger than the 55 changeable in a stationary on the machine frame Circumnavigating by hand. There can therefore be larger piece-arranged holders 25 which hold the template numbers are generated. By using the 24 on one side with an undercut edge new device can previous manual work 25 'and on the opposite side with the forces are released for other work. Except for the undercut end face 26 ′ of a slide 26 this is also covered by the automatic scanning 60, which fixes the by means of an adjusting screw 27 Product cheaper. The procedure according to the bar is.

Invention is not supported by the citation in the middle of the length of the upper, outer guide

still by the general state of the art tion part 13 is on the underside 14 "of it

been suggested. Cheeks 14 a further intermediate plate 30 by means of

In the drawing, the subject of the invention 65 of the screws 31 is attached. The intermediate plate 30

for example shown in four figures. It points on its upper side between the cheeks 14

shows a recess 30 'so that they are spaced from the

A b b. 1 is an elevation, partially in vertical section, underside 18 ′ of the upper, inner guide part 18

and do not hinder the relative movement between the same and the inner guide part 18 can. A radial bearing 40 is located on the underside of the intermediate plate 30 by means of the screws 41 attached. The same has a ball bearing 42 arranged in its vertical S central axis, in which a sliding block 43 with a pin 43 'extends. The same is mediated by needle bearings 44 guided in a groove 45 which is arranged over the central axis of a stationary turntable 46 which is firmly seated on the end face of a drive shaft 46 '. The groove 45 is open at both ends the circumference of the turntable 46 screwed cross pieces 47 ', 47 "closed. Between the one Cross piece 47 'or a screw nipple 48 arranged in the same and a shoulder in a longitudinal bore 43 "of the sliding block 43 is a compression spring 49 clamped, the tension by turning the Nipple 48 can be regulated.

By the compression spring 49, the sliding block 43 ao and thus its pin 43 'is constantly in the direction of the Slid groove of the turntable 46 and its movement by means of the transverse guides 2 and the longitudinal guide 12 transferred to the follower pin 23 and its follower roller 23 ', so that the same is in Rieh- as tion of the guide groove 45 of the sliding block 43 on the edge of the template 24 applies. By turning the grooved washer 46 constantly changes the direction of contact of the button 23 with respect to the template 24, so that the button 23 is guided along the contour of the template 24. This is how the outer part performs 13 of the longitudinal guide 12 a movement exactly corresponding to the template 24. On the cantilever, front part of the plate 21 sits a perpendicular milling device 50, the milling cutter 51 of the Template 24 and the button 23 performs certain movement and is clamped in a stationary manner Workpiece 60 mills a correspondingly shaped cutout 60 '(A b b. 2).

For the simultaneous milling out of symmetrical cutouts 60 ', for example from a spectacle workpiece 60, two symmetrical scanning devices of the type described above can be arranged on both sides of a common vertical center plane O. Because of the proximity of the cutouts 60 'in glasses, the motors 52 of the two milling devices 50 have to be offset from the common center plane O to such an extent that they cannot touch each other during the milling of the adjacent inner parts of the glasses cutouts 60'. The lateral adjustment of the central axes of the motors 52 and the milling cutters 51 caused in this way is compensated for by flexible shafts 53, for example.

The relatively heavy guides 2, 12 ensure a vibration-free and storage the cooperating parts by numerous needle and ball bearings 9 and 19 and 42 an extremely easy movement of the scanning device and, overall, an extremely precise design of the workpieces.

The scanning device described can also be used to scan the outer contours of templates z. B. the shape 60 "of glasses workpieces 60 corresponding templates 24 'with reversing stops 24 "and can be used to manufacture such workpieces. It is only necessary to use the compression spring 49, its two abutment parts 47 'and 48 and the abutment in the end of the sliding block 43 to the opposite Side of the disc 46 or the sliding block 43 to implement. After this changeover, under the action of the compression spring 49 of the pin 43 'to the center of the disk 46 and accordingly the button is pressed against the circumference of the template 24 'and by the rotation of the disk 46 the button 23 is guided around the circumference of the template 24 '.

Claims (3)

Patent claims: 1. Automatic post-forming milling machine for contour processing flat workpieces, in particular spectacle frames and the like, with one on one Machine frame movable, carrying a stylus and a milling cutter, over a right angle to its plane of movement arranged shaft drivable compound slide, and each with one, with the machine frame firmly connected holder for a template and the workpiece, thereby characterized in that on the end face of the drive shaft (46 ') for the compound slide (2, 12) a disc (46) is fixedly arranged, with one of the axis of the drive shaft (46 ') cutting guide groove (45) for receiving one in the direction of the groove under the action of a Spring (49) standing sliding block (43), which is arranged axially parallel to the drive shaft (46 ') Bearing pin (43 '), which is arranged in a on the top slide (12) of the cross slide (2, 12) Radial bearing (40) is guided. 2. Automatic reshaping machine according to claim 1, characterized in that the Lower slide (2) of the cross slide (2, 12) of two, arranged at a distance from one another The single slide (2) is fixed by the inner guide part (18) for the upper slide (12) are connected to each other. 3. Automatic post-forming milling machine according to claim 1 and 2, characterized in that the receiving bearing (40) for the sliding block pin (43 ') sits on the underside of an intermediate plate (30) which is attached to the undersides of the cheeks (14) of the upper, outer guide part (13) of the longitudinal slide (12) is attached and has a flat recess (30 ') on its upper side between the cheeks (14) as space for the free movement of the inner guide part (18) of the longitudinal slide (12). 1 sheet of drawings