DE1453206A1 - Workpiece guidance for dressing, mainly multi-sided planing machines - Google Patents

Description

"Workpiece guides for dressing, primarily multiple planing machines " The: Lrfindunt, relates to a workpiece guide for dressing de, mainly multi-sided planing machines. Multi-sided planing machines are known today, which are used in one iirbei, tszari; produce prefabricated parts from pieces of i! oh wood. The lower knife shaft usually serves as a straightener, the upper one as a thick one. In order to be able to machine the workpieces in a straight line, the dressing chip must be so large that a. Vollko: arrien level r'l: iche is obtained. In addition to the raw surface with the. Deviations from the incision, including the curvature, must be taken into account primarily as a result of warping during mechanical drying. To save wood, the pieces are usually cut to size before drying. This results in very different drying shrinkage and also leads to uneven curvatures.

during. Execution of the operations - dressing and thickening on Linzel machines - the worker is able to distribute each individual Adjusting the piece before alleli: by the fact that he the piece with a moderate dressing adjustment one or more times over the working shaft, a passage of the piece leads by a multi-sided planer generally to reject when the The dressing chip was not adapted to the back curvature. The worker aligns the dressing chip after the experience between the limits of the blank thickness and the most frequent curvature of the pieces in an entire blank is equivalent to. Too large a dressing chip leads to rejects in the thinnest pieces, while too small a rejection chip leads to rejects in the case of the more curved pieces leads.

Experienced specialists will therefore work accordingly when working on several sides cautiously by first getting the thinnest and straightest pieces from an item let through with a small dressing chip and later the thicker and more curved ones follow with great.

The described relationships are caused by the so-called torsional distortion even more complicated. The worker must convey such pieces by conveying the torsional delay position Feed the output shaft in order to be able to secure the desired finished cross-section. While this is an experienced force in hand feeding the wood to a dressing shaft can easily be @; elaborated, consists in automatic feeding in multi-page Machines present a particular difficulty in this regard.

Furthermore, the Spanahnalune should be transferred from the raw piece to the opposite Sides be roughly the same, because even with straight workpieces, a subsequent Delay occurs when a large one on one side and a small one on the other Chip is removed. This 1: apprenticeship of the wood is attempted by air conditioning after drying. to meet. Ordinary is, apart from what is required Effort, there is neither enough space nor enough time in the workflow, as full stabilization through adequate air conditioning is time consuming. But also in general the stability of the work piece remains, greater if .the The requirement for symmetrical chip removal can be met.

It has been shown in practice that auxiliary workers in general the Not sufficiently learning what is necessary. Thus there is a certain aversion to -multiple Planing machines exist because there is a fear of unavailable, qualified ones Having to use skilled workers to operate them.

The invention now primarily relates to a workpiece guide on dressing machines multi-sided planing machines, through which the mentioned difficulties and disadvantages be resolved. Their purpose is to make each inserted piece support the working shafts to be fed in such a way that the required finished cross-section through so much over the entire length how at all possible equal chip reductions above and below are achieved. In addition the guide is designed as a channel with contact surfaces coupled parallel to one another, the small opening, which can be set for the respective nominal thickness, to the lower one and upper cutter shaft are aligned for the same 2 chip removal and through insertion of pieces are symmetrically separated from one another on their tangent raw thickness and can be blocked in this LaRe for the passage of pieces.

For this purpose, the guide for the workpiece is designed in such a way that a guide channel, consisting of an upper and a lower system that can be moved parallel to one another, with adjustment of the movability on a small reading, _ @ :. side, aligning with the ser "; lell en is arranged that the paral- lel ausein; .nderdendem movable systems for the same _eger_- running shift l; op _, elbar are and that the s, -; Umetric extended dur chlas -: ieite. for the advance of an egg list is detectable. Li-ne xusf * @ lirungsforn. refers to the training of the i, anal filler surgeon in the; iron that a lower broad support- -'l: ciie with a :: r upper on the -. * rerl-stiick pressing narrow Leren guide bar cooperates, so that a three-point-like guidance of the workpiece results on two lower, more lateral contact points and an upper contact point located above them in the case of uneven workpieces.

The workpiece guide is on existing machines of the above type Can also be used together with a planer or milling shaft connected upstream or below, aligned with the die'untere or upper contact surface in the respective small opening is, while she herself @ -on the wave following in the machine with a determinable Chip allowance is set.

The subject of the invention should be based on the accompanying drawing are schematically explained in more detail in an exemplary embodiment.

Fig. 1 shows in its view the workpiece guide with a bottom upstream planer shaft on a planer and Fig. 2 in plan view.

Fig. 3 is a schematic cross section, in particular through the channel guide.

FIGS. 4 to 6 'show the representations of a crooked work = Piece in longitudinal and front views to explain the three-point guide. .

In the figures, 1 is the rubbing table belonging to a planing machine 1, whereby the planing machine is only indicated schematically: On one across the width of the dressing table extending shaft 2 is articulated a main support of the workpiece guide articulated .. The main beam 3 or the YJerkatückführung usually extends not over the entire width of the planing table, but the main beam 3 on the shaft, 2 moved laterally. If necessary, can even two workpiece guides can be arranged side by side for two work passes.

The main beam 3 is supported at a distance from its bearing point by means of a spindle 4.5 adjustable in length on the underside on the floor. The spindle 4 is hinged to the carrier 3 by means of the bolt .6. The lower end of the spindle 5 rests in a pendulous manner on a running rail 7, so that the height of the dressing table 1 can be adjusted without hindrance. By actuating the hand spindles 4 and 5, the main carrier or the workpiece guide can be aligned accordingly, for example by means of a built-in level indicator, just as it can be moved laterally on the gelle 2 and the running rail 7. The main beam 3 has a double T-like profile. In the lower part of the two side walls, the axles 8 and 8 are mounted. The movable levers 10 and 11, which are articulated to one another by a rod 12, sit on these axes. The front table 15 is movably mounted on the levers 10, 11 by means of the bolts 13, 14. The lever arrangement with the connecting rod 12 enables a parallel klöheribeweöun-the front table.

On two more rotatably mounted on the side walls of the main beam Axes 16 and 17 are firmly connected to it, two fog arms 18 and 19 with fixed Pins 180, 190 at their upper ends. Movable angle levers sit on these 2m and 21 with pins 200 and 210 on one angle arm, while the other Angle arms are coupled to one another by the rod 23. On the pin 200 and 210 the upper table or the guide rail is movably seated. The guide rail 22 can therefore also only move in parallel once when the levers 18 are twisted and 19 or continue to move the angle lever 20 and 21 in height. The cone 200 is still through the handlebar 27 with an approach of the lever 10 on the axis @: tied together. : The connection is made through a backdrop "with the Locking screw 38. Furthermore, the angle lever 20 on the axis 180 can through a toggle screw 24 can be set for the facility. On the lever 18 on the axis 16 is still firmly seated a hand lever 25, which is in a link guide can be set by the clamping screw 26; the hand lever-25 is used for adjustment the respective minimum channel width DIS. All lever lengths are dimensioned so that one Upward movement of the front table 15 is an equal downward movement of the rail 22 and the existing parallelism between them is maintained. By a knocking nose 29 on the front table in connection with a corresponding attachment 30 on the carrier, the maximum position of the front table is limited. In this situation it forms the front table a supporting surface in alignment with the machine table 1 and tangent the cutting circle of the planer shaft 28 arranged between the two tables.

The clamping lever is still movably seated on the bolt 31 of the carrier 3 32, which is pressed by a tension spring 33 against an arcuate extension of the lever 10 will. Through a foot lever 34 with the connecting rod 35 to the clamp = lever 32 the clamping can be released with .dem placed workpiece 37 is moved upwards as soon as the clamping over the 2 foot lever 34 is released. - -The working method and the operation of the workpiece guide should be explained in more detail on a workflow.

The nominal dimension of a lever machine to be machined on both sides Workpiece amount d. The thickness of the piece of wood to be processed is denoted by D. That is C = - (D-d). # 0.5 the machining allowance on each side .. In the. the larger Bexeich C given by the tolerances. now the value of the dressing chip : a the dressing shaft- the planer. This value a becomes as small as possible or assumed as the minimum value for the required dressing in the planer. the The planing machine must be on a perfect dressing surface while removing the chip D- 0 work towards which the workpiece guide or its upstream cutterblock On the underside of the workpiece, a support surface C - a is prepared by removing b Has. The thickness wave then decreases at the same time a total of 0 on the opposite side, so that d then occurs with the same mutual decrease. The lowest value of D would therefore be a + d + a, which is the distance or smallest opening width to the Setting is used. To adjust the foot lever 34 is pressed so that the front table 15, if this is not already the case, by spring tension comes into its rest position under concern of the stops 29, 30. The foot lever will released again, so that this initial position of the front table is determined is.

Through the handlebar 27 and the connection of the two angle levers 20 and 21 23 results in the inevitable parallel shift. The position of these levers is first set by the toggle screw 24 and then the handlebar connection 38 solved. After loosening the clamping screw 26 of the hand lever 25 can now the upper Guide bar 22 are moved. The distance is set to Dl: - = (d + 2a) and fixed by tightening the screw 26. The handlebar connection 38 is again fixed and the T-screw 24 loosened again. The machine is now ready to work.

The foot lever 34 is pressed and a workpiece is placed on the front table The workpiece is placed on it while being pressed down, with the contact bar 22 going upwards can now be pushed in from the side and then comes between under spring pressure Front table and upper guide rail as a channel in the system. By releasing the lever 34 the canal is fixed and the operation is carried out. The front table is there in a position before its stop corresponding to the addition C - a = b came, so that this part is processed. As from the fig. 4 to 6 can be seen is, a workpiece with a twist due to the three-point guide is below Mediation detected by the guide channel.

The embodiment illustrated in the drawing relates to a Leadership in application to a conventional multi-sided planing machine, in which a Movable front table or a support for at least one knife shaft already available is.

By connecting a further 1Vlesserwelle first accomplished a pre-modeling of the workpiece to be machined, but the Finishing is done symmetrically overall. Such a facility can be advantageously designed as a unit in £ "orm an additional device. The described However, channel guidance should also be used from the outset on such planing machines Find. The upstream shaft is omitted; the front table of the planer takes on the function of the movable lower system in ectsi, calculated modification the leadership. The minimum canal width is also set to the desired one Bulb thickness plus the smallest possible bilateral wpan reductions are set. Workpieces with masses below this are no longer detected by the guide. Workpieces with the usual allowances, on the other hand, are widened accordingly and 2esting the looser shafts for symmetrical processing.

Claims (1)

Expectations ! 1.) Workpiece guide for dressing, mainly multi-sided planing machines, characterized in that a guide channel consisting of an upper and a lower system movable parallel to one another with adjustment of the moving movement towards one another to a very small passage width with alignment to the knife shafts it is arranged that the more movable systems moving parallel apart from one another can be coupled for equal displacement in opposite directions and that the symmetrically expanded passage width for the advance of a workpiece can be determined. 2.) Workpiece guide according to claim 1, characterized in that the variable agitation channel consists of a lower, wider support surface and an upper, narrow guide strip for a three-point guide rail that presses onto the workpiece. 5.) Workpiece guide according to claim 1 and 2, characterized in that a planing or milling shaft is connected upstream for the lower or upper knife shaft of the multi-sided planing machine, the chip removal of which is adjustable to the smallest passage width with chip addition for the following knife shaft,