Device for machining window or door frames welded from profile pieces

Abstract

The invention relates to a device for machining frames welded from profile pieces such as window or door frames made of plastic, said device comprising at least one machining head and machining tools which are mounted thereon and can be delivered to the relevant machining position on the frames. The machining head can be pivoted around an axis and has a positioning shaft which is mounted at an angle with respect to the pivot axis and on which the machining tools are mounted. The positioning shaft extends on both sides of the machining head with machining tools at both end regions of the positioning shaft.

Claims

1. A device for machining a frame welded from profile pieces, the device comprising: at least one machining head, said at least one machining head having a swiveling axis about which the at least one machining head is adapted to be swiveled, and said at least one machining head having a positioning shaft defining a length from a first end to an opposing second end of the positioning shaft and the positioning shaft further defining a positioning shaft axis that extends parallel to the length, said positioning shaft extending through an interior of the at least one machining head such that the positioning shaft axis is arranged at an angle to the swiveling axis, with said positioning shaft having a first end area disposed at the first end of the positioning shaft and with said positioning shaft having a second end area disposed at the second end of the positioning shaft, with the first end area of the positioning shaft extending from one side of the at least one machining head and the second end area of the positioning shaft extending from an opposite side of the at least one machining head; and a plurality of machining tools arranged on the positioning shaft of the at least one machining head, with each one of said plurality of machining tools configured for being moved individually into machining position in respect of the frame upon selective positioning of the at least one machining head about the swiveling axis by a first actuator and selective rotation of the positioning shaft about the positioning shaft axis by a second actuator, wherein the plurality of machining tools comprises two or more motor-driven tools located at the first end area of the positioning shaft and splayed radially outwardly from the positioning shaft such that each of the two or more motor-driven tools is radially spaced from the positioning shaft axis, a first of the two or more motor-driven tools is driven in rotation for machining of the frame by a first motor-powered drive located at the first end area, and a second of the two or more motor-driven tools is driven in rotation for machining of the frame by a second motor-powered drive located at the first end area, wherein the plurality of machining tools further comprises two or more non-rotary tools located at the second end area of the positioning shaft and splayed radially outwardly from the positioning shaft such that each of the two or more non-rotary tools is radially spaced from the positioning shaft axis, wherein each one of the plurality of machining tools defines a respective machining tool axis and wherein each corresponding machining tool axis of the plurality of machining tools is aligned perpendicular to the positioning shaft axis.

2. The device according to claim 1, further comprising an actuating drive configured to control rotational orientation of the positioning shaft.

3. The device according to claim 1, wherein the frame defines a clamping plane, the swiveling axis of the at least one machining head is aligned perpendicular to the clamping plane for the frame, and the positioning shaft axis is aligned parallel to the clamping plane.

4. The device according to claim 1, wherein the at least one machining head can be moved in directions along three axes (X, Y, Z).

5. The device according to claim 1, further comprising a plurality of tool carriers, with at least a first tool carrier of the plurality of tool carriers arranged at the first end area of the positioning shaft and with at least a second tool carrier of the plurality of tool carriers arranged at the second end area of the positioning shaft.

6. The device according to claim 1, wherein at least one machining tool of the plurality of machining tools projects away from the positioning shaft in the respective first end area or the respective second end area of the positioning shaft in which the at least one machining tool is located.

7. The device according to claim 1, wherein each respective motor-powered drive has a corresponding output shaft with tool holders for rotating one or more of the motor-driven tools of the plurality of machining tools arranged at the first end area.

8. The device according to claim 1, wherein the first motor-powered drive and the second motor-powered drive are arranged one behind the other with respect to the positioning shaft axis of the positioning shaft.

9. The device according to claim 1, wherein the positioning shaft is positioned employing computerized numerical control (CNC).

10. The device according to claim 1, further comprising a second machining head, so that the at least one machining head machines a respective one of the corners and/or side profiles of the frame while the second machining head simultaneously machines a respective other one of the corners and/or side profiles of the frame.

11. The device according to claim 1, further comprising a carriage on which the at least one machining head is mounted, wherein said carriage is configured for movement in directions along three axes (X, Y, Z).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In this context, the following is shown, at times schematically:

(2) FIG. 1 a possible device for machining frames, comprising two carriages in an initial position,

(3) FIG. 2 an enlarged view of a machining head according to FIG. 1,

(4) FIG. 3 a partial view of the device shown in FIG. 1, comprising machining heads and the clamping of a profile in an initial position,

(5) FIG. 4 the device as shown in FIG. 3, in the working position for the inner corner machining,

(6) FIG. 5 another working position of the device for milling the inner corner,

(7) FIG. 6 the device as shown in the preceding figures, in a working position for machining a profile leg or a crosswise section of the frame, and

(8) FIG. 7 the device as shown in the preceding figures, in a working position for machining a lengthwise section of the frame.

DESCRIPTION OF THE DISCLOSURE

(9) The FIG. 1 shows an overall view of a device for machining the corner area of window or door frames 5, whereby said device makes it possible to machine the frame corner as well as the profile leg in the same initial position of the frame 5.

(10) The frame 5 consists of plastic profile pieces or frame legs 1, 2, 3, 4 that have lengthwise sections and crosswise sections and that have first been mitered and subsequently welded at the corners. The weld that has been created by the welding procedure and that needs to be machined already for optical reasons runs in the area of a corner at an angle of 45 relative to frame legs or profile pieces 1 to 4 that have been joined together.

(11) The corner joint is machined by means of milling, chiseling or, for example, drilling tools 6 to 13. In order to move the machining tools 6 to 13 into the working position at the specific corner areas of the frame 5 that are to be machined, the machining tools 6 to 13 have to be movable in a socket of the machining device horizontally or parallel to a clamping plane 27 of the frame 5 in the XY-direction as well as in the Z-direction perpendicular to the clamping plane 27. The X-, Y- and Z-directions are each depicted in FIGS. 1 and 2. In addition, the rotational or swiveling directions Q1 and Q2 are indicated in FIG. 2.

(12) Towards this end, there are two carriages 36 that can be moved in the X-direction and that are situated in a machine rack 35, and each carriage holds a machining head 14, 25 that can be moved in three spatial directions. It is likewise conceivable for two machining heads 14, 25 that are used on one side of the frame to each be arranged on the carriage 36. The carriage 36 can be moved by means of linear actuators such as stepping motors or spindle motors, or else, for example, by compressed air-powered piston cylinder units. The movement of the machining head 14, 25 can effectuate the machining of the top as well as of the bottom of the clamped frame 5.

(13) The machining tools employed in the embodiment selected here comprise not only stationary tools 10 to 13 such as, for instance, chiseling blades to remove the weld beads that have formed in the corner area of the frame 5 during welding, but also rotating tools 6 to 9 such as, for example, drills to create a sealing groove, side-and-face cutters to ablate the weld bead on the outer corner of the frame 5 and the like.

(14) The machining tools 6 to 9 are employed to machine profile legs or profile pieces 1 to 4, for example, in order to drill holes into the outside of the profile legs or to create elongated holes.

(15) The machining head 14, which is mounted, for instance, on a movable carriage 36 as shown in an enlarged view in FIG. 2, can be swiveled around a vertical axis 15 in the embodiment selected here, as illustrated by the double-headed arrow labelled Q1 in FIG. 2. For this purpose, an actuating drive 28 is arranged on the carriage 36 or support which, in the embodiment selected here, uses a toothed belt 30 to effectuate the swiveling of the machining head 14 relative to the carriage 36.

(16) The actuating drive 28 can have, for instance, an electric motor which, by means of a sprocket 29 arranged on its output shaft, drives the toothed belt 30 which swivels the machining head 14 around the swiveling axis 15 by means of a toothed wheel 31.

(17) A positioning shaft 16 on which the machining tools 6 to 13 are arranged is likewise mounted in the machining head 14. The positioning shaft 16 can be adjusted in the rotational direction by means of an actuating drive 26. In the embodiment selected here, the swiveling axis 38 of the positioning shaft 16 is aligned perpendicular to the swiveling axis 15 of the machining head 14, whereby the swiveling axis 15, in turn, is aligned perpendicular to the clamping plane 27.

(18) As can especially be seen in FIG. 2, the positioning shaft 16 extends to both sides of the housing 37 of the machining head 14 and it supports the machining tools 6 to 13 at its ends 16a, 16b. In this context, tool carriers 17, 18 on which the tools 6 to 13 are held preferably so as to be replaceable are arranged at both ends 16a, 16b of the positioning shaft 16.

(19) As shown in FIG. 2, the positioning shaft 16 has a swiveling axis 38 around which the positioning shaft 16 is arranged so as to swivel, as illustrated by the double-headed arrow labeled Q2.

(20) As can be seen in the figures, stationary tools 10 to 13 such as, for instance, draw blades, are provided on the tool carrier 18 and motor-driven machining tools 6 to 9 are arranged at the other end 16b of the positioning shaft 16 on the tool carrier 17.

(21) The axes 21, 22 of the motor-driven machining tools 6 to 9 can be aligned either parallel or perpendicular to the positioning shaft 16.

(22) As can especially be seen in FIG. 2 in the embodiment selected here, two motor-powered drives 19, 20 for the machining tools 6 to 9 are provided at one end 16b, whereby said motor-powered drives are arranged one behind the other in the axial direction of the positioning shaft 16 and their tool axes are aligned at a right angle with respect to each other. The motor-powered drives 19, 20 have a continuous output shaft whose two shaft ends 23, 24 have tool holders for the rotating machining tools 6 to 9. As a result, in each case, one drive can drive two machining tools 6, 7 or 8, 9.

(23) When it comes to positioning the positioning shaft 16, a computerized numerical control (CNC) is provided which allows a precise positioning of the tools 6 to 13.

(24) For the machining, the frame 1 is placed into a frame plate 32 and secured with clamping means 33 and centering means 34.

(25) The clamping means 33 can be, for example, hold-down clamps that clamp the frame 5 onto the plate 32 of the machine rack 35. There are also centering means 34 that engage with the inside of the frame 5 or of the profile legs 1 to 4 and that center the frame 5 and secure it against shifting in the clamping plane 27.

(26) When it comes to the machining itself, the machining heads 14 are initially put into position. For this purpose, the carriages 36 that carry the appertaining machining head 14 are placed onto the frame 5 that is to be machined. Then, for example, in order for the corner to be machined, the appertaining machining head 14 is swiveled around the swiveling axis 15 diagonally to the frame, e.g. by 45, by means of the actuating drive 28. Subsequently, preferably at the same time, the requisite tool 6 to 13 for the corner machining is selected through a rotational movement of the positioning shaft 16. FIG. 3 shows the position of the machining heads 14 for the inner corner machining using a side-and-face cutter.

(27) Then the appropriate machining head 14 with the tools 6 to 13 is moved once again into its initial position and the next machining tool 6 to 13 is selected by rotating the positioning shaft 16 and/or by rotating the machining head 14, 25. In this context, FIG. 4 shows the machining of the frame corner with a machining tool 12 configured as a draw blade.

(28) In FIG. 5, the machining heads 14, 25 have been rotated around the swiveling axis 15 by 180 in comparison to the position shown in FIGS. 3, and 4, so that now a side-and-face cutter 8 is employed for milling the inner corner.

(29) In the machining situation shown in FIG. 6, the positioning shaft 16 of the machining head 14, 25 is aligned parallel to the profile piece 2, in other words, it is swiveled once again by 45 relative to the position shown in FIG. 5, so that now a contouring milling disc or, for instance, a profiling cutter can then machine the outer contour of the frame 5.

(30) FIG. 7 shows the work steps employing other tools such as, for example, the machining of the profile piece 1 to 4 in order to create water slits along the profile piece 4 by means of a milling cutter 6.

(31) The device according to the invention accounts for a high level of flexibility and also allows a quick adaptation of the device to a wide array of dimensions of the specific frame 5 that is to be machined.

(32) The invention is not limited only to dual-head machining, but rather, the provision can also be made for a four-head machining device having several, especially two, machining heads 14, 25.

LIST OF REFERENCE NUMERALS

(33) 1 profile piece 2 profile piece 3 profile piece 4 profile piece 5 window or door frame 6 machining tool 7 machining tool 8 machining tool 9 machining tool 10 machining tool 11 machining tool 12 machining tool 13 machining tool 14 machining head 15 swiveling axis 16 positioning shaft 16a end of the positioning shaft 16b end of the positioning shaft 17 tool carrier 18 tool carrier 19 drive 20 drive 21 tool axis 22 tool axis 23 shaft end 24 shaft end 25 machining head 26 actuating drive 27 clamping plane 28 actuating drive 29 sprocket 30 toothed belt 31 toothed wheel 32 frame plate 33 clamping means 34 centering means 35 machine rack 36 carriage 37 housing 38 swiveling axis X axis Y axis Z axis Q1, Q2 rotating or swiveling axis