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How you should build a house

MAGR - one of the leading machine-building companies in Ukraine. The company began active activities at the Russian market through its representative office in Bryansk in late 2004. Over the past six months, woodworking machinery with brand MAGR acquired a certain prestige among Russian consumers. Dozens of machines of different denominations operate at large and small enterprises of the Russian Federation. The range of equipment designed and manufactured by Ukrainian engineering enterprise is quite diverse. It includes a band-saw machines ("Nominal", "Farmer", "Nominal-M"), and service equipment for them, the authentic multi-blade saw machines, presses for lengthwise jointing of blanks, press-clamps to glue boards and bars, sets of machines for cylindrical shaping of logs - this is not a complete list of MAGR products.

In this artincle we will elaborate on the equipment for the manufacture of parts log cabins of round logs. The advantage of wooden construction is known and obvious. High environmental and aesthetic indicators, comfort and accessibility of raw materials - all this makes popular cottages, recreation centers, playgrounds, other buildings and structures made of log cabins.

Figure 1 - Ready log cabin parts

Figure 1 - Ready log cabin parts

Ready log cabin part (Fig. 1) is considered to be cylinder-shaped log of given size (diameter and length) with technological elements made on it such as cross-notch, so called "cups", longitudinal stowage groove and compensatory kerf.

Figure 2 - machine for cylindrical shaping of logs -6.5

Figure 2 - machine for cylindrical shaping of logs -6.5

Machine for cylindrical shaping of logs -6.5 (Fig.2) developed by MAGR experts, is able to perform all operations necessary to produce ready log cabins parts. Technological sequence of parts production is shown in Figure 3.

Figure 3 - Machine notching articulated -280x45

Figure 3 - Machine notching articulated -280x45

Initial timber is placed in position on the machine between the drive and non drive centers. The machine carriage on which the control unit and actuators with electric drive are placed moves along workpiece rotating relatively slowly (30-100 rpm). The carriage moving speed can be smoothly adjusted with frequency converter. Rapidly rotating (4000 rpm) cylinder-shaping milling cutter with six knives provides obtaining of high quality cylindrical surface (Fig. 3 a).
Figure 3 a - Cylinder-shaping milling cutter with six knives

Figure 3 a - Cylinder-shaping milling cutter with six knives

Processing of the log is carried in one or more passages of the carriage in both directions. One-pass milling cutter is capable to remove up to 60 mm on diameter. Normally, we recommend precise performing of the finishing pass that is at a lower carriage passing speed with a maximum speed of the workpiece rotation. Depending on appropriation the diameter of the cylinder obtained can vary from 160 to 300 mm. Permissible deviation from a given diameter over the length of 6.5 m does not exceed 2-3 mm. The carriage is equipped with lunette to prevent vibration of workpiece that can occur when processing cylinders of small diameter (less than 180 mm) and large length (more than 5 m).

Turning-milling method of log processing into the machine for cylindrical shaping of logs -6.5, allows us to obtain a beam perfectly straight and equal to the diameter. With this processing method a disadvantage inherent to machines of rotary type, where the beam is obtained equal to the diameter, but the curvature of the log is copied, is excluded. Special lock fixes a cylinder-shaped workpiece to prevent its rotation, and a single pass of carriage with combined milling cutter performs a longitudinal stowage groove (Fig. 3 b).

Figure 3 b - longitudinal stowage groove

Figure 3 b - longitudinal stowage groove

Cups are marked on the log according to the specification and excised with the same combined milling cutter (Fig. 3 c).
Figure 3 c - excision of the cups with combined cutter

Figure 3 c - excision of the cups with combined cutter

The vertical supply is done automatically. For marking cups machine can be equipped with an electronic scale. Compensatory kerf 70 mm depth is performed with circular saw (Fig. 3 d).

Figure 3 d - compensatory kerf with circular saw

Figure 3 d - compensatory kerf with circular saw

Marking and excising of cups will take some time during which machine for cylindrical shaping of logs does not perform its basic function - its does not cylinder-shapes the logs. In order to improve the performance of -6, 5, MAGR offers machines that are designed to excise the cups on cylinder-shaped blanks.

Figure 4. - Machine notching fixed -280 operation scheme

Figure 4. - Machine notching fixed -280 operation scheme

First consider machine notching fixed -280 (fig. 4). Its originality lies in the fact that the cutting tool here is the narrow band-saw, so called "fretsaw" saw (fig. 5).
Figure 5. - The machine for excising cups on the log cabin parts -200-0

Figure 5. - The machine for excising cups on the log cabin parts -200-0

Virtually all known "cup excising machines" excise cups with a cutter of certain diameter, which requires everyday availability of all diameter of cutters to excise cups of different size. Drive power of such "cup excising machines" is very significant, ranging from 5.5 to 11 kW. The machine proposed allows to excise cups of almost any diameter in the range from 160 to 280 mm without changing of cutting tool.

Smooth adjustment of the cup diameter is made by rotation of flywheel with the control on the scale. Machine can excise cups at an angle of 90° 45° relative to the timber axis. If necessary, so-called "butt end" cup can be made. Drive is carried out by one electric motor 1,5 kW.

With a log diameter up to 200 mm one saw is able to excise about a hundred cups.

-200 - a small-sized portable device for cutting crowned cross-notch "cup" (fig. 6) is proposed for operational work at the construction site. The device can excise cups, an angle 90° to the axis of the timber and at an angle of + 45°.

Brief technical characteristics of the machine for cylindrical shaping of logs - 6,5
Dimensions of cylinders obtained diameter/length, mm160...340/ 6500
Transfer rate of carriage, adjustable gearless, m/min0,27....12,3
Workpiece rotation frequency, gear adjustable, rpm30;50;60;100
Electric motor capacity, W - cylinder-shaping milling cutter15
- combined milling cutter11
- circular saw2,2
Overall dimensions: length /width/height, 9,7/1,3/1,73
Weight, kg2000
Brief technical characteristics of machine notching fixed -280
Workpiece diameter, mm160...280
Band saw blade, mm3200*10*6*0,6
Drive power, W1,5
Overall dimensions: length /width/height, 2000/1920/1400
Weight, kg502

The functioning of all mentioned equipment can be seen at the permanent exhibition and sale of machine tools in Bryansk. Company' experienced installers will demonstrate the equipment capabilities and perform a free training of buyers' personal.

Machine tools are certified in Russian and Ukraine. One year warranty period for equipment is provided.

Now you can think about - How you should build a house...

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