FI88067B - Procedure for production of wooden bow and frame parts - Google Patents

Description

88067

Method for the manufacture of wooden frame and frame parts Förfarande för framställning av träbäge- och -karmdelar

The present invention relates to a method for manufacturing frame and frame parts made of wood 5.

In particular, the invention relates to a method for manufacturing wooden window parts, but it can also be applied to the production of other, similar parts.

10 For the manufacture of window and similar parts of wood, the basic procedure is generally to cut the timber used to make a particular window part, for example a frame, to lengths determined by the window, which parts are then planed to their final cross-sectional shape. After this, after a possible cut-out of its length, the corners of the form-planed parts are machined into angular joints, i.e. the parts are "taped".

A variant of this method is also known, in which the planing of cut-to-size parts is carried out only on a part of the surfaces, the planing of one surface remaining to be carried out after the machining of the corner joint shapes.

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According to another variation, the timber of the frame part is pre-planed to its final cross-sectional shape, after which a cut is made to the lengths determined by the window.

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Such manufacturing methods require the production of similar parts in succession in large batches.

. . However, for example, a triple window has a wide variety of cross-sectional parts, such as: an inner frame, an intermediate frame, an outer frame, and these parts also differ depending on whether it is, for example, the upper or lower part of the outer frame. Thus, for each cross-sectional shape, a different planing planer needs to be used. The same applies to a large extent to the machining of angle joints. For example, machining the corner joint shapes of the outer frame requires a different machining blade than machining the corner joint form of the inner frame.

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Furthermore, there are methodological shortcomings in the machining of the corner joint forms of the frame, as in general the joint is machined at one end of the frame part at a time with a blade insert with parallel milling cutters on the same spindle for machining a notched structure of a particular corner joint shape. The blade gun, which consists of a spindle and milling discs, is in a vertical position on the machine tool, and the machining feed movement takes place horizontally. A major disadvantage of this machining method is that the window parts then have to be handled individually and turned over for machining the other end.

In addition to a vertical notching machine, machines are also known in which the notching blade position is positioned on a horizontal spindle, in which case the machining feed movement is performed vertically. However, these machines are designed for machining the head of one window section at a time, i.e. their use has the same drawbacks as vertical spindle machines.

The disadvantages associated with these known manufacturing methods can be eliminated by the method according to the invention, in which the timber of the frame and frame parts is at least partially planed to its final cross-sectional shape, the parts are cut to size, the cut parts are fed in accordance with the basic theory of the method, so that the frame and frame parts are fed without changing the advancing position to the machining of the 35 end ends of the angle joint, that the angle joints are machined to the ends of the frame and frame parts

By following the basic teachings of the method according to the invention, the manufacture of the frame and frame parts can be carried out with less processing than before, in that the parts to be machined do not have to be turned in order to machine the opposite ends of the parts. The second feature of the method according to the invention, in turn, allows, inherently related to the previous feature, that several parts can be machined in parallel.

If the blade set machining the angle joints is arranged relative to the workpiece in such a way that the feed movement of the machining 15 takes place in a vertical direction, it is possible to use a horizontal machine tool. When such a horizontal spindle is still positioned perpendicular to the direction of travel of the workpiece and a plurality of milling discs 20 are placed at a suitable distance from the spindle, the angle joint shape can be machined simultaneously at the ends of several parallel parts. Despite the simultaneous machining of many parts, it is simple to control the parts to be machined, because the parts to be machined are horizontal.

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The selection of milling discs in the angled connection form also makes it possible to machine different parts in parallel at the same time. It is possible that the equipment is dimensioned, for example, for machining all parts of the window 30 at a time.

· /: 'The invention is illustrated by means of the accompanying drawing, in which 35 · Figure 1 shows a general schematic diagram of a side line of a manufacturing apparatus applying the method according to the invention:

Figure 2 shows this apparatus seen from above. The apparatus illustrated in Figures 1 and 2 comprises a sliding conveyor table 47 extending over the entire length of the apparatus, with a plurality of parallel, longitudinal grooves 48-53. In order to transfer the parts to be machined on the sliding conveyor table, the apparatus comprises transfer devices consisting of two support rails 54,55 and transfer devices 19,38,39 moving on the rails. The support rails 54,55 are on each side of the sliding transport table, and extend substantially the length of the table. In addition, the apparatus has compensating pushers 20 and 29, and pressing devices 7-15 12; 28.37 for aligning and locking the parts to be machined in place during the various machining steps.

For machining the corner joints, the frame and frame parts 1-6 are stacked in parallel in the grooves 48-53 in the stacking position A at the beginning of the table, so that the front end of the parts will be in a precisely adjusted position. If the parts have been planed to their final cross-sectional shape only partially, i.e. with three side surfaces, before cutting to size, they are loaded on a sliding transport table 47 with an unshaped '2'5 surface downwards.

In this position, the parts can be provided with bores, the parts of which can be suspended in a surface treatment line included in the production line of a window or the like. Said bores 30 are placed at the ends of the parts at points which are hidden in the corner joint when the window is assembled. For drilling, parts 1-6 are locked with pushers 7-12 and drilling is performed. * ‘With drilling rigs 13-18.

‘35 After the drilling step, the parts 1 to 6 are slid in parallel in their grooves 48 to 53 by the transfer device 19 to the machining station B of the corner joints, where the shape of the corner joint is machined at the front end of the parts. The parts are moved slightly over the intended machining point, and the advancing position of their front ends is precisely aligned with the advancing direction by an anti-advancing pusher 20. The parts are locked in this position by a pusher 28, 5, after which the transfer device 19 returns to retrieve a new ladle.

The angle joint shape is machined with a blade insert consisting of a horizontal spindle and 10 milling discs 22-27 mounted side by side. The blade set is arranged to be moved vertically, in the embodiment shown from the starting position 21 below the sliding transport table 47 to the turning position 21 'and back. During this reciprocating movement, the rotating milling discs 15 22-27 machine the joint forms to the front end of the parts 1-6.

When the blade set returns to its starting position 21, the transfer device 19 pushes the blade set over the tail set station C and at the same time pulls the front end of the new set machine 20 to country B. The tail end station B is aligned with the set. parts 1 to 6 with a leveling pusher 29 in exactly the right place: *. * and locked in this position with a pusher 37. After this. *. · the joints are machined between the ends 30 and 30 'of the ladle parts with a moving blade insert '25 in the same way as the front end machining was performed. This tailpipe also consists of a horizontal spindle and milling discs 31-36 mounted side by side. The vertical movement of the two successive positions is preferably arranged to take place simultaneously under the control of the same actuators, • whereby the trailing end of the advancing block and the front end of the following: Y block are machined simultaneously.

‘· The lathe processed in both directions is moved forward 35 · by the transfer device 38 to the area of influence of the transfer device 39.

The transfer device 39 passes the ladle to the finishing planing stage; Y to D, and further through it. In finishing planing 6 88067, the lower surface of parts 1-6 is machined into the final shape.

If, in the machining step of the angle joint shapes, the directions of rotation of the blade sets are chosen so that the cutting direction of the blades is towards the surface to be planed, any cracks that may occur in the finishing planing step are eliminated.

With regard to the machining step of the angle joints 10 detailed in Fig. 1, it can also be stated that the blade sets 22-27 and 31-36 can of course also be movable from top to bottom in the machining step, whereby their directions of rotation can be the same as shown in Fig. 1. On the other hand, the directions of rotation of the blade sets 22-27 and 31-15 36 may be opposite to those shown in Fig. 1, if the parts 1-6 enter the machining step so that the unshaped surface is above.

It is also possible that instead of two spindles, only one spindle is used. In this case, the machining of the front ends of the parts can be performed, for example, when the blade set moves upwards and the machining of the rear ends when the set moves in the opposite direction. In implementing this operating model, it is expedient for the direction of rotation of the spindle to be changed as the feed direction of the machining 25 changes, so that the cutting movement of the blades is directed towards the non-planed surface of the part.

Contrary to the structure shown in Figure 1, the blade inserts 41-30 46 performing the final planing may also be in contact with the upper surface of the parts 1-6 if the parts are fed above the unmachined surface.

Claims (6)

1. A process for making wood and frame parts in wood, in which the wood for the cup and frame parts is molded at least into one part to its final cross-sectional shape, the parts are cut to a certain extent, the cut parts are measured in longitudinal direction for machining (B) of corner joint shapes, and at their front ends a corner joint shape is processed, characterized in that the cup and frame parts are measured with the unchanged progress position for machining (C) of the corner joint shape of the final teeth, the corner joints of the end parts and in the machining of the corner joint forms, the feeding movement is performed between the piece 20 (1-6) to be machined and the machining bed (22-27; 31-36) in the vertical direction. Method according to claim 1, in which the cup and frame parts (1-6) are partially molded, characterized in that the bite (22-27; 31-36) which processes the corners of the joint forms is rotated so that the cutting direction of the bite is against the non-planed surface of the cup and frame members, and that the cup and frame members are molded (D) to their final shape after machining the corner joint shapes. : 30 Method according to Claim 1 or 2, characterized in that in the cup and frame parts (1-6) heels (13-18) are drilled for suspension in the surface treatment line. Method according to any of the preceding claims 1-3, characterized in that the cup and frame parts are transported through the machining phase for the corner joint molds 9 and the final multi-part molding phase. Method according to claim 4, characterized in that the parts to be transported in parallel are different. Process according to claim 5, characterized in that the parts are parts of a production unit, such as a window.