FI90639B - Method and apparatus for machining elongated profile pieces - Google Patents

Description

9Q639

Method and apparatus for machining elongate profile pieces

The present invention relates to a method according to the preamble of claim 1 for machining elongate profile pieces.

According to such a method, the workpieces are each in turn conveyed through a machining station where the desired longitudinal profile is machined into them by means of profiling units.

The invention also relates to a device according to claim 7 for machining profile pieces.

Profiled parts (profiles) are used in various structures and buildings and form important parts of these. The functions of the profile pieces most often vary depending on the type of doors, windows, hatches or similar pivoting parts attached to the profiles. In addition, diverse profiles are required, depending on how many parts close or otherwise turn against the profile. The need for diversity of profiles is increased by the different numbers of seals and sliding surfaces per one swivel or associated hatch or door, window, etc. Said pieces can also be various moldings and covers for building openings as well as cladding panels.

When profiles are made of solid material, such as wood, they are usually machined with a planer or cutter on continuous or chopped wood in a machine with pre-assembled counterparts, guides and machining blades in a specific position and order. If it is desired to machine a new profile in such a device according to the prior art, it is necessary to change the position of the blades, the shape of the blades and the distance of the counterparts, etc. to correspond to the new profile shape. After the changes have been made, it is usually necessary to run the test profiles and measure them to be sure of the correct setting. Very typically, in the present technology, many different machining heads are arranged on the same axis, whereby by changing its position, i.e. the height, a steel suitable for the desired machining is obtained which is suitable for the height of the working plane. It follows, in turn, that the support surface of the workpiece cannot be close to the rotating steel, because the support surface must be at least so far away that the steel with the largest diameter can move past it. Such a support surface arrangement limits the length of the shortest part in practice to about 350 mm.

Industrial plants that manufacture products used as profiles usually only need a limited number of profiles. At the same time, they have a need for fast deliveries and no special desire to keep the finished product in stock. The prior art devices described above are not very well suited to achieve these goals.

We have now discovered a simple method and apparatus for overcoming the problems described above.

The solution according to the invention is based on the use of profiling units which can be adapted to two different operating positions, namely the free port position and the machining port position. In the free-gate position, the raw material can be pushed through the machining unit without being tampered with in any way by the machining members of the profiling unit. As it passes through the Machining port, the part acquires the shape of the machined profile predefined for it.

The basic idea of the invention is therefore that the settings to be observed in machining are not adjusted by the positions of the blades, as in normal machine tools, but by the machining port / free port positions of the profiling units.

More specifically, the method according to the invention is mainly characterized by what is set forth in the characterizing part of claim 1.

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The device according to the invention, in turn, is characterized by what is set forth in the characterizing part of claim 7.

For the purposes of this application, the free port position means a position of the machining unit in which a free slot is formed at the workpiece through which it can pass through the machining unit without coming into contact with the working blade. In a preferred embodiment of the invention, in the free-gate position, the passage of the body is formed between the counter unit and the guides spaced therefrom.

The machining port position, on the other hand, refers to the opposite case, i.e. a position in which the part entering the machining unit comes into contact with the blade to be machined. Preferably, the body is adapted to pass through a machining slot formed between the blade and the above-mentioned counter unit.

According to the invention, the trajectory of the workpieces is continuous, i.e. they are not moved laterally during machining, but are moved linearly forward by means of a suitable transfer device. This is possible thanks to the precise positioning of the free and machining port positions, whereby the successive free grooves formed and the machining grooves, respectively, form a uniform and continuous groove.

In cases where the parts are machined only from the other side of the path, any conventional conveyor can be used as the transfer device, such as a belt or roller conveyor on which the part moves forward and which also serves as a support for the part during machining. However, in those cases where the workpieces are machined on both sides, the workpieces are moved forward by means of a transfer device which acts as a counterpart to the machining unit, which device may consist of, for example, traction wheels and drive devices. The operation of this transfer device is described in more detail in the application example.

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The profile machine has a number of profiling units described above in succession, all of which are pre-installed for a particular desired profile shape. The setting of each profiling unit to the free port or machining port position is done by pre-programming automatically and, if desired, separately after each machined part. During the machining of each part, at least some of the profiling units are in the free gate position.

The trajectories of all profiling units are parallel, more precisely they are moved perpendicular to the path of travel and perpendicular to the surface to be machined. Thanks to this solution, the necessary continuous, straight path is formed.

When the profiling units presented above are in succession e.g.

9 pieces, 9 different basic profiles or combinations thereof can be machined with the same profiling machine by opening the desired number of free ports and machining ports, respectively. This can be done as a continuous machining for successive pieces, so that at any time the profile can be changed, for example - as mentioned above - for each piece differently. Each piece can get its own profile shape from the pre-set templates that there are in total in the successive profiling units. This change can still be carried out at a rapid rate without compromising the machining speed with the method and device according to the invention, leaving a gap between the parts to be machined.

The machining units can be arranged on either side of the path of the pieces to machine the pieces from two opposite surfaces, whereby all the units machining the same surface are placed in succession.

All the settings of the blades of the profiling machine are fixed for one profile shape and the machine is fixedly mounted on a carriage on which said free port is also mounted. Said carriage moves between the open-close positions, either bypassing the part or machining it.

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Naturally, the necessary Machining Blades and their positions can be set in each profiling unit to achieve the desired profile.

The device according to the invention can be manufactured from identical machining units per se by assembling them in the required number in succession.

The invention has considerable advantages. In addition to the above, it can be said that the settings of the device are very accurate and fast. The machining unit according to the present invention processes more precisely than the long-axis unit according to the prior art, because the short shaft and the smaller rotating mass attached to it have less tendencies of both torsion and lateral vibration. In the device according to the invention, the free space between the support surface and the machining member is minimized, so that pieces up to 150 mm in length can be machined.

There are always several profiling units in the machine, which are not used for the part to be machined, but are in the free port position. This results in apparent oversizing and overcapacity of individual pieces. However, these disadvantages are a disadvantage compared to the advantage of being able to change the profile to be machined very quickly.

The advantages of a device consisting of a profiling line become apparent especially when making quite short sets or when making even just one piece. Despite the shortness of the series, you can rely on pre-programming (orders), such as continuous series work.

The price of one machining unit is advantageous compared to a machining unit in which changing the height of the shaft results in different machining.

The invention will now be examined in more detail with the aid of the accompanying drawing, in which the top view shows the basic structure of the device according to the invention.

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The direction of travel of the workpiece 1 to be machined is shown in the figure from right to left. The blank consists, for example, of wooden parts of window frames, which are to be planed on two sides to produce a profile suitable for the window. The parts are fed in the order in which the frame circumference is assembled, i.e., the lower frame, the first side frame, the upper frame, and the second side frame.

The device is assembled from nine consecutive profiling planing units numbered in the direction of travel 2-10. Each of them consists of a carriage 12 movable on rails 11, on which is mounted an actual machining unit (planer unit 13), which in turn consists of a fixed or rotatable blade 14. The setting of the blade 14 is adapted to the desired profile. In front of the blade 14, at a distance therefrom, is arranged on the same carriage a unit 15 for moving with the planing unit 13, with a counter-system and a piece transfer device. The latter consists of traction wheels and their drive, by means of which the workpieces are conveyed forward through the profiling unit. In a preferred embodiment of the invention, the transfer device comprises a so-called a carpet feeder in which three wheels are arranged at the tips of a triangle, the two wheels being arranged in parallel so that they press against the piece passing through the studio, while the third wheel is connected to a traction. A belt (e.g. a toothed belt) is arranged around the wheels to carry the piece forward. In another alternative embodiment, no carpet feed is used, but the drive wheels are coated with a friction-promoting material, such as rubber or some suitable plastic, and are arranged on both edges of the unit 15. The position and distance of the counter system unit 15 relative to the blade 14 are set according to the desired profile and the thickness of the workpiece, and can be changed when the blank is changed. At the front of the carriage 12, in front of the unit 15, there are still guides 16 consisting of metal arms, the distance of which to the counterpart system unit 15 can also be set according to the thickness of the blank.

As can be seen from the figure, planing units 13 are arranged on each side of the passage groove of the blank 1. In this case, the units 90 to 39639, 2 to 6 and 7 to 10, respectively, are arranged in succession. In the figure, the units 2, 3, 5, 6, 7, 9 and 10 are arranged in the neutral position, while instead the units 4 and 8 are in the machining position, the blanks 1 to be machined in the neutral position units pass through the free soles formed between the transfer devices 15 and the guides 16. , whereby the guides press the pieces against the drive wheels of the transfer devices. In the units 4 and 8 in the machining position, the blanks 1 pass through the machining soles formed between the transfer devices 15 and the blades 14, whereby they are pressed against the blades by the transfer device 15 and the desired profile is machined into them.

After machining, the blanks are moved forward for assembling the frames or machining the joints.

As mentioned above, the parts of the frame are fed to the correct length, cut and in the desired assembly order, which is possible because the solution according to the invention can accurately machine considerably shorter pieces than can be achieved with the devices according to the prior art.

Claims (13)

A method for machining elongate profile pieces, the method comprising: - the pieces to be machined (1) are each conveyed in turn through at least one machining station (2 to 10) where the desired profile is machined by means of profiling units, characterized in - the pieces (1) are moved along the continuous path through the machining station, - the pieces (1) are machined by means of a series of profiling units (2 to 10) adapted to be moved between the free gate position and the machining port position, whereby only one profile is machined pieces. Method according to Claim 1, characterized in that the profiling units (2 to 10) are moved in parallel movements with one another between their free port and machining port positions. Method according to Claim 1 or 2, characterized in that the profiling units (2 to 10) are moved by at least substantially linear movements between the free gate and machining gate positions which are at least substantially perpendicular to the path of the pieces (1) and the surface to be machined. Method according to one of Claims 1 to 3, characterized in that the profiling units (2 to 10) are arranged on both sides of the path of the bodies (1) for machining the two surfaces of the bodies in one pass. Method according to one of the preceding claims, characterized in that the pieces (1) are conveyed in a substantially linear motion via a continuous travel consisting of free soles and machining soles formed by profiling units (2 to 10) in the free port or machining port positions, respectively. Method according to one of the preceding claims, characterized in that as many profiling units (2 to 10) are arranged in succession in the same machining station as are intended for machining different profiles or combinations thereof, all profile shapes being obtained by placing individual profiling units in either free or machining port positions. Method according to one of the preceding claims, characterized in that at least some of the machining station profiling units (2 to 10) are in the free port position during the machining of each part. An apparatus for machining elongate profile pieces, the apparatus comprising - at least two profiling units (2 to 10) with which the desired longitudinal profile can be formed in the pieces (1), and - a transfer device (15) for transferring the machined pieces to the profiling units (2 to 10) to remove them from the units after machining, characterized in that - the transfer device (15) is adapted to transport the workpieces in a continuous longitudinal movement, and - each profiling unit (2 to 10) is movable between in the machining port position, each profiling unit is adapted to machine only one type of profile on the part. 10 90639 8 90639 Device according to Claim 8, characterized in that the blades (14) of the profiling units (2 to 10) are fixed. Device according to Claim 8 or 9, characterized in that each profiling unit (2 to 10) consists of a machining unit (14) with blades (13) fixedly mounted on a carriage (12) movable in linear motion at least approximately perpendicular to the parts to be machined ( 1) against longitudinal movement. Device according to one of Claims 8 to 10, characterized in that the machining unit (14) comprises a planer. Device according to one of Claims 8 to 11, characterized in that in the machining port position, the machining slot of the profiling unit is delimited by a machining blade (14) and a mating piece (15) on the opposite side thereof. Device according to Claim 12, characterized in that the transfer device consists of traction wheels arranged on the mating piece (15). H 9 G 639