DE4018145A1 - Plastics window frame weld cleaner - has tool support with contour miller and milling tools set according to the frame profile - Google Patents

Abstract

Appts. to clean window frames, is constructed from welded plastics profile sections, to remove surplus and projecting material at the welds, has a disc-shaped contour miller (5) at the tool carrier (4), generally parallel to the plane of the window frame, with an axial gap from at least one milling tool (2). At least two milling tools (2,3) are located above each other on a common shaft (6), parallel to the window frame plane, together with the contour miller (5), at the tool carrier (4) which also supports the motor-driven shaft (6). A control guides the tool carrier (4) to move the contour miller (5) round the outer corner contour of each frame (1) when in the operating position. The control has a sensor (7) at the tool carrier (4) to register at least one working surface (8) pref. at the working plane of the contour miller (5) when in the operating position at the outer contour of the frame (1). A profile identification unit (10) at the control moves at least one of the milling tools (2,3) or the disc-shaped contour miller (5) in the operating position using contacts (11,12) or sensors to register the frame (1) profile. The control system is pref. a computerised numerical control. The tool carrier (4) has a drill (13, 13a) at least at one free end of the shaft (6). The tool carrier (4) slides at right angles to the plane of the window frame through a support (15) running parallel to the frame plane on the base frame (14) of the appts.. Drives (22,23), operated by the control, push the tool and support carrier into their settings, using piston/cylinder units (22,23) operated by a pressure medium, or they are electrical systems with a step- or spindle-motor which can work at one of two speeds. ADVANTAGE - The appts. gives a reliable weld cleaning action and can be reset rapidly for a change of window frame, so that it can be prepared for the window frames most commonly processed.

Description

The invention relates to a plastering device for frame welded from plastic profiles or the like for Remove the protruding parts from the weld Welding bead with at least one milling tool receiving tool carrier, which in the frame level and perpendicular to it in the working position of the at least a tool is movable.

Plastering devices for plastic profiles welded frames, window frames, door frames or the like serve to weld the profiles to the Welding seams of the corner areas arise, to the outside to remove protruding weld beads. To plaster the Visible surfaces of the frame corner become processing tools guided along the weld. Against become Remove the on the outside corner of the frame perpendicular to the Welding bead often created at the frame level Profile milling cutter used, which under execution of a short swivel movement past or at the outside corner the outer corner moved to create a chamfer will. The profile cutters must match the respective one Have profile exactly adapted contour, so that for different frame profiles also different Profile cutters are required. Since the number of in profile types used in the window industry the demand was increased with one and the same Machine to be able to process different profiles, on the part of the machine manufacturers followed, two milling tools of different contours to integrate in one device. For example, the in DE-PS 30 20 739 described outside corner Plastering device in a machine frame Recording for the frame guided longitudinally Support on which one the two on one common drive shaft arranged milling tools  holding sledge by means of a linear actuator is adjustable in height. To change the processing between two different profiles Slider moved up or down so that the each matching cutter to the height of the to be revised Profile is brought. An automatic setting the device towards the currently inserted profile achieve and thus processing with a wrong one To prevent milling tools are on the holder for the Frame two the outside of the frame at different heights probing limit switches provided by which the Height adjustment of the milling tools in the respective Working position is controlled. The number of in one Different profile cutter sets that can be integrated into the machine is, however. a. also through cost-related constructive Claims, capped. In addition, the installation of five cutter sets, for example, are not sufficient increasing number of even at a window manufacturer different plastic profiles used to edit.

There are also external corner plastering devices known as a circular saw blade instead of a profile cutter, which basically the processing of different Allow frame profiles. In from DE-OS 33 10 307 known plastering device is the circular saw blade by means of a two-axis path control guided along the weld bead to be processed, whereby the processing point of the profile contour of the weld seam on Outside corner of the frame follows. This profile contour must for each profile to be edited in the program control as Record exist, which is high electronic Effort required and accordingly in the Manufacturing costs of the machine. A Another disadvantage is that in the program control only the target course of a profile can be saved, so that deviations of the actual profile from the target profile due to  Profile tolerances and welding inaccuracies are not can be taken into account. These are difficulties in the known from DE-OS 38 23 564 External corner plastering device with circular saw blade overcome that a button with in the level of Circular saw blade to lie on the touch surface processing framework on a versus the Machining point offset point in horizontal and vertical direction and the movement of the Circular saw blade according to the actual contour of the window frame controls. Outside corner plastering devices with circular saw blade are, however, compared to those with profile cutters basically with the disadvantage of a longer one Processing time due to less Feed speeds affected. It also requires Use of the known circular saw blades with the Incisors arranged circumferential cutting at the Machining of those running parallel to the disc plane Workpiece surfaces, and especially if that Circular saw blade parallel to the return Slice plane is moved out of the profile, one intermittent radial and axial movement of the Tool to achieve a clean milling pattern. These back and forth movement of the circular saw blade conditionally high inertia forces and requires a reduction in applied cutting speed. The one in window construction currently specified cycle times for processing a Windows can therefore almost only be used by Reach milling cutters.

Proceeding from this, the object of the invention is a plastering device of the type mentioned above to design that with a structurally simple structure and reliable operation different frame profiles with short set-up times at the same time low clock frequency for processing frequently used profiles is reached.  

To solve this problem it is i. w. provided that tool carrier an i. w. parallel to Disc-shaped contour milling cutters aligned at frame level has, which is at an axial distance from the at least a milling tool is arranged.

The plastering device according to the invention enables one universal use for different frame profiles and combined in a particularly simple way Show the advantages of a device with profile cutters those of side milling machines. For those at the Profiles frequently used by each user are the milling tools that enable rapid machining used while only occasionally occurring Profile types of the disc-shaped contour milling cutters in Working position is brought. The switch between the Different frame profiles can be edited perform easily and quickly by the tool carrier with the editing tools up or down is driven to the appropriate milling tool or the Saw blade in working position with regard to the height of the bring editing profile. Since the Machining tools on a common tool carrier are arranged, only one drive unit is required to perform the path and switching functions, whereby both quick repeatability of individual Operations as well as a quick tool change is reached.

In a first particular embodiment of the invention it is provided that at least two milling tools this in i. w. levels parallel to the frame level one above the other, preferably on a common shaft are arranged, resulting in a small size machine according to the invention results. In addition, at least for the milling tools only require a rotary drive.  

According to one embodiment of the invention, the at least two milling tools and the disc-shaped contour cutter on a common motor driven shaft of the Tool carrier arranged. Regardless of which at each Therefore, only one tool is needed Drive motor. Because the tools on one common drive shaft are arranged compared to a significant reduction in size a possible embodiment in which the tools individually on separate, for example Transmission drive interconnected, shafts are arranged.

It is also within the scope of the invention that the Tool holder by means of a control disc-shaped contour milling cutter in its working position leads along the outer corner contour of the respective frame.

In a preferred embodiment, the controller a feeler device held on the tool carrier, which in the working position of the disc-shaped Contour cutter on the outer contour of the respective frame and / or scans with preferably in the plane of the disc-shaped contour cutter coming to lie at least one touch surface. This touch device can For example, be trained in the way they are in DE-OS 38 23 564 is described with at least one together with the disc-shaped contour milling cutter axially and radially Movable button, the window frame at the touch point probes that in the plane of the disc-shaped Contour cutter lies and opposite the machining point is laterally offset to the frame. The button switches then with a deflection in the frame plane and vertically a radial or axial movement of the disc-shaped contour milling cutter. It is also possible to use two such buttons, which on both sides of the  touch the window frame at the respective processing point. It is an alternative to this electrical contact control also possible in the disc-shaped contour milling cutter Working position by means of a program control, e.g. a computer-aided numerical, so-called CNC Control, along the outside corner profile of the frame method.

According to another idea of the invention it is provided that the controller a Profile recognition device for moving the respective Milling tool or the saw blade in the working position has to an automatic setting of the device to reach the currently inserted profile.

In one embodiment of this inventive concept the profile recognition device with the respective Frame profile scanning and / or scanning contact elements o. Like. sensors are provided. So this facility, For example, corresponding to that in DE-PS 30 20 739 described type, two or more of the outside of the frame limit switches probing at different heights have by different frame profiles, such as for example a sash and frame profile, in are actuated in different ways and a drive for moving the tool carrier or the suitable tool to the height of the machined Switch profiles.

Of course it is also possible to use the whole Control training as a CNC control, which is because of the associated electronic effort especially recommends if the entire manufacturing the frame runs computer-aided and for a complete machining requires only two axes of motion will.  

The flexibility of the device according to the invention can according to another proposal, can be increased by that the tool carrier at at least one free end the shaft has held drilling tool. That or that Both drilling tools can, for example, be used for drilling out Serve sealing grooves on the frame. Because the drilling tools also taken up by the tool carrier or the shaft there is no additional need for their use Drive and control mechanisms.

The tool carrier can be moved in two Movement axes can be based on a suggestion from Invention in a particularly advantageous design by realizing that the tool carrier on a a base frame of the device parallel to Support led in the direction perpendicular to the frame level Frame level is kept displaceable.

According to one embodiment of the invention, the Tool carrier at least one for reaching over to the side of the frame formed leg, on which at least one, possibly with a disc-shaped one Contour milling cutter provided, drilling unit is held. These Drilling units are made by moving the tool carrier or the support in the respective work position brought, so that additional thrust drives omitted. Such drilling units can also, for example serve to bore out sealing grooves in the frame, so that u. Additional work steps that were previously required or other machine stations in the manufacture of the Window frames can be omitted. It is also conceivable one or both drilling units in the frame level or Coming drilling axis and / or at an angle to it appropriate alignment of the disc-shaped To arrange contour cutters.

According to a proposal of the invention, the actuating movement follows  of tool carriers and support by means of the control actuatable linear actuators. But it is also conceivable for manual use of the profile milling cutter to be provided and, for example, the disk-shaped contour milling cutter mechanically by means of a respective outer contour guide template.

The linear actuators can be operated as pressure-operated piston Cylinder units can be formed.

However, electric thrusters are used Feed units preferred, such as step or Spindle motors. The electrical Feed drives for an adjustable Feed speed formed, preferably between at least two feed speed levels be switchable. To achieve a clean milling pattern the disc-shaped contour cutter in the driven at a lower speed, while the higher level is reserved for milling tools.

The disc-shaped contour cutter can be used as a circular saw blade be trained.

According to yet another idea of the invention however, especially for use with Plastering devices with a disc-shaped contour cutter arranged circumferentially, one circumferential cutting edge each having incisors proposed, which is characterized in that the incisors on at least one outside each from radially outside to radially inside i. w. running parallel to the disc plane Have minor cutting edge, which also means parallel to Workpiece or profile surfaces running on the plane of the disc a high surface quality is achieved.

In a special embodiment of this  According to the invention, the incisors have at least radially inward to the outside Inner sheaths inclined at the disc level. This is it now possible, parallel to the plane of the disc Contour milling profile surfaces also in Machining the return movement of the tool without an intermittent back and forth movement as with the known circular saw blades is required. With the Contour cutters according to the invention can therefore be higher Realize feed speeds so that the Difference in machining times with a profile cutter and the contour milling cutter according to the invention compared to a circular saw blade considerably reduced. Is also through the inner cutting edges according to the invention the surface quality compared to machining with circular saw blades improved.

The internal cutting edges are advantageously radial Distance to the respective peripheral cutting edge and preferably close to the associated minor cutting edge at.

It has also proven to be particularly favorable if the Cutting, at least the peripheral cutting, one Have chip thickness limitation d.

Other goals, advantages, features and Possible applications of the present invention result from the following description of a Embodiment with reference to the drawings. Make it up all described and / or illustrated Features on their own or in any meaningful way Combination the subject of the present invention, regardless of their summary in the Claims or their relationship.

Show it:

Fig. 1 shows a possible embodiment of a device according to the invention in the working position of the upper milling tool, in a side view

Fig. 2 shows the device according to FIG. 1, but in the working position of the lower milling cutter,

Fig. 3 shows the apparatus according to Fig. 1 in the working position of the disc shaped profile milling cutter,

Fig. 4 shows a possible embodiment of a disc-shaped contour milling cutter according to the invention, in a plan view, and

Fig. 5 shows the profile milling cutter according to Fig. 4 in cross section.

The device shown in the drawing has a base frame 14 designed as an iw vertical plate with two spaced-apart horizontal guides 25, 26 on which an approximately U-shaped support 15 is guided so as to be longitudinally displaceable. On the base frame 14 there is also a receptacle 27 provided with lateral stops for the profile frame 1 to be machined. On both legs 16 , 17 of the U-shaped support 15 , which overlap the frame 1 laterally above and below in the working position, an upper parting knife 28 or lower parting knife 29 is held, which are pivotally mounted in height and for removing the welding beads protruding from the visible surfaces of the respective frame.

A tool holder 4 is guided on the support 15 so as to be height-adjustable. On the tool carrier 4 , in turn, a vertical shaft 6 is mounted, on which two milling cutters 2 and 3 designed as profile cutters and, at an axial distance from the two milling tools 2 and 3, a disk-shaped contour milling cutter 5 and on the free ends of the shaft 6 in each case a drilling tool 13 or 13 a are included. A motor 30 , which is also held on the tool carrier 4 , is provided for the rotary drive of the shaft 6 , a traction mechanism transmission designed as a belt transmission 32 being used for torque transmission between the motor shaft and the shaft 6 receiving the tools.

For the adjusting movements of the tool carrier 4 in a vertical direction according to FIGS. 1 to 3 and for the corresponding longitudinal displacement of the support 15 , electrical feed units designed as stepping or spindle motors 22 , 23 are provided, which drive the drive spindles 24 and 31, respectively.

On the receptacle 27 for the frame 1 there is a profile recognition device 10 with spaced-apart contact elements 11 , 12 which probe the frame profile 1 inserted at different heights. Such a profile recognition device 10 is described in detail in DE-PS 30 20 739, to which reference is expressly made here. It is used to recognize the frame profile 1 inserted in each case, in order to then decide which of the two profile milling cutters 2 or 3 or whether the disk-shaped contour milling cutter 5 is to be brought to the height of the profile 1 to be machined. The signal generated by the contact elements 11, 12 is processed in a control device which switches the stepping or spindle motor 22 to adjust the height of the tool carrier 4 in accordance with the appropriate tool.

In the operating state shown in FIG. 1, a frame 1 designed as a sash profile is inserted. In this profile, only the lower contact element 12 is actuated, while the upper contact element 11 remains unactuated. In this switching state of the profile recognition device 10 , the tool carrier 4 remains in its lower position shown in FIG. 1, so that the upper milling tool 2 comes into engagement for milling off the welding bead on the outer corner of the frame. If, however, a frame 1 is inserted according to the frame profile shown in FIG. 2, both contact elements 11 and 12 are actuated. With this identifier, the stepping or spindle motor 22 is actuated with the associated drive spindle 24 and the tool carrier 4 is shifted upward into the position shown in FIG. 2. The lower milling tool 3 is thus at the level of the frame profile to be machined in order to remove the protruding weld bead on the outer corner.

If, on the other hand, a profile different from the profile types shown in FIGS . 1 and 2, such as that shown in FIG. 3, is inserted, neither of the two contact elements 11 and 12 is actuated when the machine is switched on. On the basis of this identifier, the control switches the spindle drive 22 in such a way that the tool carrier 4 is moved downward into the position shown in FIG. 3 and the disk-shaped contour milling cutter 5 is in the working position. The guiding of the disc-shaped contour milling cutter 5 along the Außeneckkontur of such a frame 1 takes place by means of a held on the tool carrier 4 sensing device 7 which has an axially and radially movable together with the disk-shaped contour cutter 5 button 9, impairing the frame 1 in a tactile surface 8, which lies in the plane of the disk-shaped contour milling cutter 5 and is laterally offset relative to the processing point toward the frame 1 . The signals occurring when the button 9 is deflected in the frame plane and perpendicularly thereto are fed to the control unit, whereupon the stepping or spindle motors 22 and 23 are switched for a horizontal or vertical movement of the disk-shaped contour milling cutter 5 along the outer corner contour to be machined. At the same time, in this switch position of the profile recognition device 10, according to the profile according to FIG. 3, the thrust speeds for the two spindle drives 22 and 23 are switched back to a lower level in order to achieve a clean milling image even when the disk-shaped contour milling cutter 5 is used .

To increase the security in the profile detection, so to ensure that, for example, in the embodiment described here with two profile cutters 2 and 3, one of them also fits the particular profile inserted, or else the disk-shaped contour cutter 5 can be brought into the working position, it can it is advisable to arrange several of the contact elements 11 , 12 in different planes of the profile height or width.

The captured at the free ends of the shaft 6 drilling tools 13 and 13 a can be used in particular for releasing the drilling of gasket grooves, using the same control and drive units are used as in the aforementioned processing tools. In addition, in the exemplary embodiment selected here, the tool carrier 4 has two legs 37 and 38 designed to grip the frame 1 laterally, on each of which is held a drilling unit 20 and 21 provided with a disk-shaped contour milling cutter 18 and 19 , respectively, by means of which drilling is also carried out Sealing grooves in the frame or in the area of the inner edges and, if necessary, the welding beads can be removed from the visible surfaces.

In Fig. 4 and 5 is disk-shaped contour milling cutter 5 is formed in the manner of a circular saw blade with circumferentially angordneten, each having a main or peripheral cutting edge 33 having cutting teeth 34. In addition, the cutting teeth 34 are provided on both outer sides of the contour milling cutter 5 with secondary cutting edges 35 and internal cutting edges 36 . The secondary cutting edges 35 extend from radially outside to radially inside, iw parallel to the disk plane. The inner cutting edges 36 adjoin the respectively associated secondary cutting edges 35 and are inclined radially inwards towards the disk plane. Due to the formation of the secondary cutting edges 35 , a high surface quality can also be achieved on workpieces or profile surfaces which run parallel to the disk plane. The secondary cuts 35 also make it possible to move the contour milling cutter 5 vertically to the plane of the disk in the engaged position on the profile without having to carry out intermittent feed movements. The design of the disk-shaped contour milling cutter 5 with internal cutting edges 36 now makes it possible, even in the return movement of the disk-shaped contour milling cutter 5 , to machine profile surfaces running parallel to the disk plane, such as the profile surface 1 a in FIG. 3, with relatively high feed speeds and corresponding area performance.

Both the peripheral cutting edges 34 and the secondary cutting edges 35 and the inner cutting edges 36 have a chip thickness limitation d in the exemplary embodiment selected here.

Reference symbol list

1 frame
1 a profile surface
2 milling tool
3 milling tool
4 tool carriers
5 disk-shaped contour cutters
6 wave
7 touch device
8 buttons
9 buttons
10 profile recognition device
11 contact element
12 contact element
13 drilling tool
13 a drilling tool
14 base frame
15 support
16 legs
17 legs
18 disk-shaped contour milling cutters
19 disc-shaped contour milling cutters
20 drilling unit
21 drilling unit
22 linear actuator
23 linear actuator
24 drive spindle
25 leadership
26 leadership
27 recording
28 parting knives
29 parting knives
30 engine
31 drive spindle
32 belt transmission
33 peripheral cutting
34 incisors
35 secondary cutting
36 internal cutting
37 legs
38 legs
d Voltage thickness limitation

Claims (20)

1. Plastering device for frames ( 1 ) or the like welded from plastic profiles for removing the welding bead protruding from the weld seam with a tool carrier ( 4 ) having at least one milling tool ( 2 ), which is in the frame plane and perpendicular to it in the working position of the at least one tool ( 2 ) is movable, characterized in that the tool carrier ( 4 ) has a disk-shaped contour milling cutter ( 5 ), which is aligned parallel to the frame plane and is arranged at an axial distance from the at least one milling tool ( 2 ). 2. Plastering device according to claim 1, characterized in that with at least two milling tools ( 2 , 3 ) these are arranged one above the other in iw parallel to the plane of the frame, preferably on a common shaft ( 6 ). 3. Plastering device according to claim 1 or 2, characterized in that the at least one or at least two milling tools ( 2 , 3 ) and the disc-shaped contour milling cutter ( 5 ) are arranged on a common motor-driven shaft ( 6 ) of the tool carrier ( 4 ). 4. Plastering device according to one of claims 1 to 3, characterized in that the tool carrier ( 4 ) by means of a control guides the disk-shaped contour milling cutter ( 5 ) in its working position along the outer corner contour of the respective frame ( 1 ). 5. Plaster according to claim 4, characterized in that the controller comprises a held on the tool carrier (4) sensing device (7) which arrival in the working position of the disc-shaped contour cutter (5), the outer contour of the respective frame (1) and / or sampling with preferably at least one touch surface ( 8 ) coming to lie in the plane of the disk-shaped contour milling cutter ( 5 ). 6. Plastering device according to claim 4 or 5, characterized in that the control has a profile detection device ( 10 ) for moving the at least one or the respective milling tool ( 2 , 3 ) or the disk-shaped contour milling cutter ( 5 ) in the working position. 7. Plastering device according to claim 6, characterized in that the profile detection device ( 10 ) with the respective frame profile ( 1 ) scanning and / or scanning contact elements ( 11 , 12 ) o. 8. plastering device according to one of claims 4 to 7, characterized in that the control as CNC Control is trained. 9. Plastering device according to one of claims 1 to 8, characterized in that the tool carrier has at least one free end of the shaft ( 6 ) accommodated drilling tool ( 13 , 13 a). 10. Plastering device according to one of claims 1 to 9, characterized in that the tool carrier ( 4 ) on a in a base frame ( 14 ) of the device parallel to the frame plane support ( 15 ) is displaceable in the direction perpendicular to the frame plane. 11. A plastering device according to claim 10, characterized in that the tool carrier ( 4 ) has at least one leg ( 37 , 38 ) designed to grip over the frame ( 1 ) laterally, on which at least one, possibly with a disc-shaped contour milling cutter ( 18 , 19th ) provided, drilling unit ( 20 , 21 ) is held. 12. Plastering device according to one of claims 10 or 11, characterized in that the actuating movement of the tool carrier ( 4 ) and support ( 15 ) takes place by means of slide actuators ( 22 , 23 ) which can be actuated by the control. 13. Plastering device according to claim 12, characterized in that the thrust drives ( 22 , 23 ) are designed as pressure-actuated piston-cylinder units. 14. Plastering device according to claim 12, characterized in that the thrust drives ( 22 , 23 ) are designed as electrical feed drives, preferably as step or spindle motors. 15. Plastering device according to claim 14, characterized in that the electrical feed drives ( 22 , 23 ) are designed for a controllable feed speed, preferably can be switched between at least two feed speed stages. 16. Plastering device according to one or more of the preceding claims, characterized in that the disc-shaped contour milling cutter ( 5 ) is designed as a circular saw blade. 17. Disc-shaped contour milling cutter, in particular for plastering devices according to one of claims 1 to 15, with circumferentially arranged, each having a circumferential cutting edge ( 33 ) having cutting teeth ( 34 ), characterized in that the cutting teeth ( 34 ) on at least one outside each have one from the radially outside have a secondary cutting edge ( 35 ) running radially inward iw parallel to the disc plane. 18. Disc-shaped contour milling cutter according to claim 17, characterized in that the cutting teeth ( 34 ) on at least one outside each have radially inwardly inclined inner sheaths ( 36 ) inclined to the disc plane. 19. Disc-shaped contour milling cutter according to claim 18, characterized in that the inner cutting edges ( 36 ) are arranged at a radial distance from the respective peripheral cutting edge ( 33 ) and preferably connect to the associated secondary cutting edge ( 35 ). 20. Disc-shaped contour milling cutter according to one of claims 17 to 19, characterized in that the cutting edges ( 33 , 35 , 36 ), at least the peripheral cutting edges ( 33 ), have a chip thickness limitation d.