DE4138501A1 - Multi-position welder for plastic sections esp. for windows and door frames - has adjustable welding heads and rotating clamps for joining corners at any angle - Google Patents

Abstract

The multi-position welding machine for simultaneous welding of several plastic sections at any desired angle can have each welding head fixed at any inclination relative to the machine base. The positioning surfaces are mounted on a plane and can be rotated relative to the welding head along a vertical axis. The welding head as well as the positioning surfaces can pref. rotate through +/- 22.5 deg. A guide surface for joining a corner insert can be provided which can be adjusted with an angular graduated scale. USE/ADVANTAGE - Partic. useful for joining several plastic sections at window and door frame corners at various angles.

Description

The invention relates to a multi-position welding machine for welding several plastic Pros at the same time file at desired angles, especially to frames share windows, doors or the like, with one Machine bed that carries several welding devices that one contact surface each for the profiles, clamping units for holding the profiles, positioning stops on the up welding surface and welding mirror for heating of the areas of the profiles, each sweat device is pivotable about a vertical axis.

When creating a corner or a node, d. H. a so-called fighter connection, from framework len for windows, doors or the like from individual, preprocessed plastic profiles using a known The plastic profiles on the welding machine Bearing surface of a table of the welding machine, automatically by means of clamping units against the support Positioned positioning stops pressed and there  tightened. Then a welding mirror is between the areas of the profiles to be welded lowered, whereby the surfaces of the areas to be welded be melted. After pulling back the sweat The profiles are put together when heated encountered, which causes a weld. After this the profiles have cooled, there is a fixed Ver binding.

With such a formation of a single connection points are due to a suitable arrangement of the tools and the stops between the profiles in certain sizes zen either an obtuse, right or acute angle achievable, however, this procedure is possible with large, asym metric frame parts, as reinforced by Wintergär ten or roof studios, very time consuming and expensive, since the individual connection points after each other with interim renovation if necessary the welding device must be trained.

For the simultaneous formation of several welded connections so-called multi-point Known welding machines, which usually have three or four welding devices in parallel alignment are arranged side by side on a machine bed. A first profile part is made in the longitudinal direction of the machine beds on the contact surfaces of the individual welding devices directions laid. By means of the individual welding device lines can then each on the first profile part teres profile part are welded at right angles. In this way, several sweats can be made simultaneously Connections are made, but the connection Possibilities of the individual profile parts based on the Be restriction to right angles very limited. Dull or acute angles between the profile parts, as they often do  occur with roof structures, can be with a do not train known multi-position welding machine.

In addition, a welding machine with two sweat devices known to the machine bed by a ver tical axis are pivoted so that you can choose in a direction perpendicular to the longitudinal direction of the machine bed aligned, parallel position or one in addition, turned towards each other by 90 ° are pivotable. In their first, parallel position serve the welding devices in the manner described above for the formation of welded joints from the right Profile parts arranged at an angle to each other. In your pivoted position are also so-called H-frames can be trained with a fighter welded in on both sides.

The invention has for its object a multi-point To create welding machine with the several at the same time Welded connections between plastic profiles below be reliably formed at any angle can.

According to the invention, the above-mentioned object is achieved with a more place welding machine solved in that every sweat device in any swivel position on the Ma Schinenbett is fixable and that the positioning stops on the support surface relative to the welding device adjusted along a circular path around the vertical axis are cash.

When welding plastic profiles to frame parts it is desirable or necessary that the weld a connection in the bisector between the two plastic profiles forming the node runs. To form a frame part, its profile  parts, for example, at an obtuse angle β The welding fixtures are to collide the vertical axis by the angle (90 ° -β) / 2 from it Basic position in which it is perpendicular to the longitudinal direction of the Machine bed are oriented in the desired direction pivoted. Then the necessary position kidney stops also by the angle (90 ° -β) / 2 ver poses. Then a plastic longitudinal profile in the longitudinal direction processing of the machine bed over the contact surfaces of the Welding devices placed and clamped there. According to Anor and the other plastic profiles are clamped the welding is carried out in a known manner. By swiveling or adjusting both the welding process directions as well as the positioning stops around the ver tical axis can be achieved that the sweat always seams in the bisector of the connection angle runs.

With every welding device, art can be created fabric profile to the plastic longitudinal profile essentially Connect at any angle. However, it has shown in practice that it is for most application cases is sufficient if both the welding fixtures as well as the positioning stops around the vertical axis are adjustable in an angular range of ± 22.5 °, so that the smallest, formable connection angle 45 ° be wearing. However, it is also possible to enlarge it the degree of swiveling out more acute connection angles to build.

Since the individual welding devices are independent of one another can be pivoted, it is also possible several plastic profiles at different angles to be welded to the longitudinal profile. Usually you will however, the welding devices ver by the same amount  pivot and thus a parallel arrangement of art fabric profiles at an angle relative to the longitudinal profile achieve.

For good guidance during the adjustment and one Achieving accurate positioning is more advantageous Development of the invention provided that each Posi tioning stop has a guide shoe that in a Engages groove which is formed in the bearing surface.

Because the adjustment of the positioning stops relative to the welding device takes place along a circular path, it is designed to reduce the construction effort partial that the groove is circular arc around the vertical Axis runs. Thus, when moving the guide the correct adjustment movement automatically in the groove can be achieved without the need to implement a movement is dig.

To ensure precise guidance when moving along the groove to ensure, it is preferably provided that the guide shoe is formed by an arc segment whose curvature corresponds to the curvature of the groove. The guide shoe can thus on three sides, i.e. H. its Underside, its inner curved side and its outer curved side, full surface on the walls of the Groove fit, causing the guide shoe to tilt can be avoided in the groove. That way to achieve a smooth, smooth adjustment.

When the positioning stops their desired position they must have reached the welding device or the contact surface. This can happen with for example by means of screws or a friction connection can be achieved. In an advantageous embodiment of the Er  However, the invention provides that the guide shoe has means of a clamping device can be fixed in the groove. This is preferably done using a clamping wedge, by means of which the guide shoe opposes itself from the inside the groove surfaces tension. This is the way of leadership shoe and thus the positioning stop in every bigen intermediate position on the welding device layable. In addition, the guide shoe, if the Groove has no undercut, from above into the groove used and removed from the groove accordingly. A lateral insertion of the guide shoe into the groove can therefore be omitted.

To adapt to different plastic profile To enable cross sections and widths is fiction provided according to that the positioning stop relative is adjustable to its guide shoe. This can ent neither by a releasable clamp connection or the adjuster a screw in an elongated hole.

In the formation of a fighter union, in which a Plastic profile, d. H. the fighter profile, over a two partial weld, arranged at a right angle a middle area of the plastic longitudinal profile closed, is more common as a positioning stop wise use a side alignment stop. In it inventive design of this stop for a Fighter profile is intended to be along an angle scale is adjustable. If the angle scale is circular can also run in an arc around the vertical axis exact positioning for the alignment stop its adjustment around the vertical axis the.  

Basically, the vertical axis that is the reference point for the adjustment and swivel movements, to belie elsewhere. To the constructive on wall and in particular the radius of curvature of the grooves is small to keep the vertical axis through the Support surface run in the welding device. Be It is particularly advantageous if the vertical axis passes through ver the vertex of the connection of the fighter profile runs because in this way simple adjustment movements can be achieved.

To make the multi-spot welding machine as versatile as possible To be able to use, it is provided according to the invention that the welding devices along the machine bed right are adjustable relative to each other. Thus, in Be If necessary, different grid dimensions or distances between the plastic profiles. Because In order to achieve precise positioning, the Swiveling and adjusting movements by means of electronically controlled servomotors.

Further advantages and features of the invention result from the following description of an embodiment with reference to the drawing. Show it

Fig. 1 is a side view of a modern multi-point welding machine Invention,

Fig. 2 is a plan view of the Mehrstellen- welding machine according to Fig. 1,

Fig. 3 is a plan view of the contact surface of a welding device,

Fig. 4 shows an arrangement of two Schweißvorrich obligations to achieve two right-angled terminal connections,

Fig. 5 shows an arrangement of two welding devices to achieve two acute angled connection connections.

A multi-position welding machine 10 has a machine bed 11 with three welding devices 12 ( FIGS. 1 and 2). The welding devices 12 are aligned perpendicular to the longitudinal direction of the machine bed 11 and in each case parallel to each other. Along a guide, not shown, the welding devices 12 can be adjusted relative to one another in the longitudinal direction of the machine bed 11 , as is indicated by the double arrows H.

Each welding device 12 can be pivoted independently of other welding devices about a vertical axis V into any angular position, as is indicated by the double arrows S. In Fig. 2 three angular positions are shown in dashed lines as an example for each welding device 12 . The angular position 12 'corresponds to a rotation of the welding device 12 by 22.5 ° in the clockwise direction, whereby profile connections with a connection angle of 45 ° can be formed, as will be explained in detail later. The angular position 12 '' corresponds to a rotation of 22.5 ° around the vertical axis V in the counterclockwise direction. As a third angular position 12 '''is shown a rotation through 90 °. In this way, two adjacent welding devices 12 can be aligned, so that the simultaneous welding of both fighter connections to an H-frame is possible.

Each welding device 12 has a table 13 with a bearing surface for the profiles, as it is shown in Fig. 3 Darge. The table 13 has in its front area a triangular recess with a right angle aufeinan standing edges 13 a, 13 b. If its rear edges 14 a, 14 b of a further table 14 run in the contour parallel to the edges 13 a, 13 b of the table 13 . The table 14 is movable along guides 15 and 16 in Rich direction of the table 13 and in the opposite direction, as indicated by the double arrow B.

In the open shown in Fig. 3 a welding device 12 state between the two tables 13 and 14, an intermediate space 29 is formed with two straight, adjoining areas at right angles. In this space 29 , a welding mirror 17 can be lowered perpendicular to the plane of the drawing, which usually consists of a heatable carrier with a Teflon coating. After the welding mirror 17 has been moved into a raised position, the table 14 can be moved against the table 13 by closing the intermediate space 29 . In the closed state not shown, the two tables 13 and 14 form a continuous flat surface.

In the support surface of the upper table 13 , an annular groove 23 is formed, which runs in a circular arc around a vertical axis V. The vertical axis extends perpendicular to the plane of the drawing through the corner point of the triangular recess in the lower side edge of the table 13 .

A guide member 24 in the form of a short angular profile has on its underside a guide shoe, not shown, which engages in the annular groove 23 . The guide shoe is formed by an arc segment, the curvature of which corresponds to the annular groove 23 . In addition, the width of the guide shoe corresponds to the width of the ring groove 23 .

One leg 24 a of the guide member 24 lies over the entire surface on the support surface of the table 13 , while the other leg 24 b extends perpendicular to the plane of the drawing. On the upstanding leg 24 b as a positioning stop 25 a plate 25 is attached, which bears over the entire surface of the leg 24 b. The plate 25 is adjustable along the leg 24 b, whereby the relative position of the guide shoe to the plate 25 is adjustable.

The table 14 has an annular groove 18 in the support surface, which runs in a circular arc around a vertical axis V 'ver. The vertical axis V 'also extends perpendicular to the plane of the drawing and passes through the intersection of the side edges 14 a, 14 b of the table 14th In the closed state of the tables 13 and 14 , the two vertical axes V and V 'coincide substantially.

A guide shoe of a guide part 19 formed from a short angular profile is likewise arranged in the annular groove 18 . The guide shoe, like the guide shoe of the guide part 24, has an arc segment, the curvature and width of which corresponds to that of the annular groove 18 . A lower leg 19 a lies on the bearing surface, while an upper leg 19 b extends substantially perpendicularly to it. At the upper angle 19 b acting as a positioning stop plate 20 is adjustably connected.

At the lower end of the table 14 , an arcuate angle scale 22 is formed, the center of curvature of which forms V 'on the vertical axis. Along the angle scale 22 , an alignment stop is adjustable, wherein a guide shoe 21 a engages in a groove of the angle scale 22 . On the carrier 21 , a guide 31 is formed, which is substantially tangential to the circular arc-shaped win kelskala 22 . In the guide 31 , a stop element 30 is arranged for the fighter profile, which is adjustable along the guide 31 . The stop element 30 is adjustable on a scale to the distance of the fighter tip to the profile contact edge.

Both the guide shoe 21 a of the alignment stop and the guide shoes of the guide parts 19 and 24 can be fixed in place in the respective groove by means of a clamping device.

The entire welding device 12 is pivotable about the vertical axis V, the vertical axes V and V 'coinciding in the closed state of the tables 13 and 14 .

With reference to FIGS. 4 and 5 will hereinafter be explained in the lung herstel of frames made of plastic profiles.

Fig. 4 shows the arrangement of the welding devices 12 to form a frame with a right-angled corner and a right-angled fighter connection. In the left welding device in Fig. 4, the guide part 24 of the table 13 is aligned such that the plate 25 forms a horizontal upper positioning stop, while the plate 20 of the table 14 forms a lateral, in Fig. 4 vertical positioning stop. The alignment stop is removed.

The welding device 12 (on the right in FIG. 4) is set up to form a fighter connection, an upper positioning stop being formed by means of the plate 25 and a lower stop by means of the alignment stop. The two welding devices 12 are aligned parallel to one another and, relative to the machine bed, assume the position shown in FIG. 1 perpendicular to its longitudinal direction.

Over the contact surfaces of the welding devices 12 a in the machine bed longitudinal direction Langspro fil 26 is placed, which is posi tioned by contact with the plates 25 . At its left end, the longitudinal profile 26 has a bevel at 45 °, so that its beveled side edge comes to rest on the lower side edge of the upper table 13 . In a central section, the longitudinal profile 26 has a triangular recess, the shape of which corresponds to the recess of the lower side edge of the upper table 13 with a corresponding cutout. In this position, shown in FIG. 4, the longitudinal profile 26 is held by means of clamping units (not shown) and clamped against the bearing surface and the positioning stops.

A plastic corner profile 27 also has a bevel at 45 ° at its upper end in FIG. 4, so that the upper side edge comes to lie exactly on the correspondingly inclined side edge of the lower table 14 . The corner profile 27 is also clamped by means of a clamping unit, not shown, against the bearing surface and the plate 20 acting as a positioning stop. A plastic fighter profile 28 is arranged on the right welding device 12 , the upper end of which tapers to a point below 45 ° due to two bevels. The tip of the fighter profile 28 is located exactly on the upper, tapering section of the upper side edge of the lower table 14 . For precise alignment of the cam profile 28 , this rests on the alignment stop 21 and is held in this position by means of a tensioning unit, not shown. The dimensions of the longitudinal profile 26 , the corner profile 27 and the fighter profile 28 are adapted to one another in such a way that a mutual right-angled connection is formed at the end of the welding process without shoulders or projections.

After the profiles 26 , 27 and 28 are positioned and clamped ver, the welding mirror 17 are lowered into the spaces 29 between the tables 13 and 14 . By means of the welding mirror 17 are at the left Schweißvorrich the beveled ends processing of the longitudinal profile 26 and of the corner profile 27 are melted during the welding mirror 17 of the right welding device, the surfaces of the triangular recess of the longitudinal profile and the two pointed to running surfaces of the header section 28 melts.

After melting, the welding mirror 17 is raised so that the gaps 29 are free, and the tables 14 are each moved upwards against the tables 13 , whereby the melted surfaces are butted and welded together. After the profiles have cooled, there is a firm connection.

The frame thus produced has a corner profile and a Fighter profile that run parallel to each other and each because at a right angle to the longitudinal profile are closed. Both with the corner connection as well the weld seam runs at the fighter connection in 45 ° and thus in the direction of the bisector of the Connection angle.  

In Fig. 5 the arrangement of the welding devices for producing a frame is shown in which a corner profile and a fighter profile run parallel to each other ver and are each connected at an acute angle (90 ° -α) to the longitudinal profile.

For this purpose, both welding devices 12 around the respective vertical axis V by angle α / 2 in counter-clockwise pivoted. The plates 25 are then adjusted along the respective annular groove 23 by an angular range of α / 2 in the clockwise direction, so that the plates 25 again have a horizontal orientation as shown in FIG. 5.

The plate 20 of the left welding device 12 is adjusted along the annular groove 18 by an angular range of α / 2 in the counterclockwise direction. A corresponding adjustment is made for the alignment stop by means of the carrier 21 along the angle scale 22 of the right welding device.

A longitudinal profile 26 , a corner profile 27 and a fighter profile 28 are now arranged in contact with the positioning stops on the support surfaces, their ends coming to lie in a known manner on the edges of the spaces 29 between the tables 13 and 14 . The profiles are held in this position by means of clamping units (not shown).

Subsequently, the melting of the contact surfaces of the profiles by means of the welding mirror 17 and the abutting of the profiles on the melted con contact surfaces by means of the movement of the lower table 14 in the direction of the upper table 13th After the Pro file has cooled, a frame results in which the corner profile and the fighter profile are connected to the longitudinal profile at an acute angle.

In the described embodiment, the welding devices have each been pivoted by the angle α / 2 in the counterclockwise direction. In addition, the positioning stops, ie the plate 20 in the left welding device and the alignment stop in the right welding device, were adjusted relative to the respective welding device or its contact surface by the angle α / 2 in the counterclockwise direction. Thus, both the corner profile 27 and the fighter profile 28 differ in their position shown in FIG. 5 by the angle α from the respective position shown in FIG. 4. The respective connection angle between the longitudinal profile and the corner profile or the fighter profile is thus due to the pivoting or adjustment of both the welding devices and the Positionieran blows by α / 2, the weld in each case arranged in the bisector.

Claims (14)

1. Multi-position welding machine for the simultaneous welding of several plastic profiles at desired angles, in particular for frame parts of windows, doors or the like, with a machine bed that carries several welding devices, each with a contact surface for the profile, clamping units for holding the profiles, Positioning stops on the support surface and welding mirror for heating areas of the profiles to be welded, each welding device being pivotable about a vertical axis, characterized in that each welding device ( 12 ) can be fixed in any pivoting position on the machine bed ( 11 ) and that Positioning stops ( 20 , 21 , 25 ) on the support surface are adjustable relative to the welding device ( 12 ) along a circular path around the vertical axis (V, V '). 2. Welding machine according to claim 1, characterized in that both the welding devices ( 12 ) and the positioning stops ( 20 , 21 , 25 ) about the vertical axis (V, V ') in a Winkelbe range of ± 22.5 ° adjustable are. 3. Welding machine according to claim 1 or 2, characterized in that each positioning stop ( 20 , 21 , 25 ) has a guide shoe which engages in a groove ( 18 , 23 ) which is formed in the bearing surface. 4. Welding machine according to claim 3, characterized in that the groove ( 18 , 23 ) extends in a circular arc around the vertical axis (V, V '). 5. Welding machine according to claim 3 or 4, characterized in that the guide shoe is formed by a circular arc segment, the curvature of which corresponds to the groove ( 18 , 23 ). 6. Welding machine according to one of claims 3 to 5, characterized in that the guide shoe can be fixed in the groove ( 18 , 23 ) by means of a clamping device. 7. Welding machines according to claim 6, characterized records that the clamping device is a clamping wedge is. 8. Welding machine according to one of claims 3 to 7, characterized in that the positioning stop ( 20 , 25 ) is adjustable relative to its guide shoe. 9. Welding machine according to claim 8, characterized in that the positioning stop ( 20 , 25 ) along an elongated hole is adjustable relative to the guide shoe. 10. Welding machine according to one of claims 1 to 9, characterized in that an alignment stop ( 21 ) for a fighter profile ( 28 ) is provided which is adjustable along an angle scale ( 22 ). 11. Welding machine according to claim 10, characterized in that the angle scale ( 22 ) extends in a circular arc around the vertical axis (V, V '). 12. Welding machine according to one of claims 1 to 11, characterized in that the vertical axis (V, V ') runs through the apex of the connection of the fighter profile ( 28 ). 13. Welding machine according to one of claims 1 to 12, characterized in that the Schweißvor directions ( 12 ) along the machine bed ( 11 ) are adjustable relative to each other. 14. Welding machine according to one of claims 1 to 13, characterized in that the swivel and Adjustment movements by means of electronically controlled servomotors.