Now the homebrew expanse: tool all ways- eyes run! Both manual and electric… so I bought a milling machine for wood (model IE-5003). In General, a good unit with a great range of performed technological operations, easy handling and acceptable technical characteristics, the number of revolutions up to 30000 per minute, power — 500 watts.
But there are drawbacks. Two of them, in my opinion, significant. First, the regular guide is in the center of great neck (60 mm), which inevitably leads to marriage end sections of the workpiece. Second, the workpiece when milling needs to be tightly fastened, and flow to be moving the car. This technological scheme is very inconvenient in the processing of long parts with small cross-section, for example, glazing beads, Skirtings, etc. as a result of suffering the quality and performance.
That’s the idea at the base of the machine IE-5003 to create a stationary woodworking milling mini-lathe. What came out of it — can be seen in the figure.
The machine base — frame of the disused aquarium size 600x300x300 mm from a steel angle 25×25 mm. For a table you can use almost any sheet material: steel, aluminum, plywood, textolite. I used plexiglass with a thickness of 10 mm. From available this material seemed most appropriate, it is quite hard, easily processed by any mechanical tools on the machine, and manually securely glued.
In the center of the table for the cutter and nozzle cleaner-cut shaped window, copied from the regular table of the milling machine. To the bottom plane holds four lugs, through which are passed two round rod. Them as skewers, skewered milling machine. The rods in the lugs and machine the rods are fixed locking screws-lambs.
To maintain the necessary inter-center distances, the alignment guide holes and gaps of 1-2 mm (cross section a—a), lugs glued to the table, complete with rods and a bench. This was ensured perpendicularity of the cutter relative to the machine table, which is extremely important for producing high-quality products.
Woodworking milling mini-lathe:
1 — milling machine electric hand (IE-5003), 2 — frame (steel angle 25×25), 3 — socket 220 V, 4 — plate switch Board (PCB s 10— 12), 5— switch, 6 — workpiece, 7— table (plexiglass s10— 12), 8— track (pine, timber 40×80), 9 — comb presser (plywood s10, 2 PCs.), 10— bolt M8, nut, washer (6 set), 11 — mill, 12— bolt M6 (14 pieces) 13— retainer guide (dural area 50×50, L540), 14— 5×40 wood screw (2 PCs), 15 — Cam presser(plywood s10), 16— bolt M10 nut-“lamb”, washer, 17 — rod (steel rod , L300, 2 PCs.), 18 — screw-“lamb” M6 (8), 19 — boss (plexiglass, 4-piece), 20 — Bush, 21 — pin locking (steel rod, L10, 2 PCs.), 22 — torsion spring, 23 — sleeve 24 — emphasis (M8 bolt, nut, washer).
To handle straightforward products installed guide bracket from dural area (cross-section the more the better) with the attached screws removable wooden block, which is selected depending on the workpiece dimensions. In the center of the guide bar at the base of the niche is made for the free accommodation of the cutter (in the case that the processing affects only the edges of the product), and the upper surface of the block are drilled four holes dimetrom 8.2 mm to bolt two wood (or plywood) combs. They are located above the workpiece at the entrance (before milling cutter) and not the output. Spring effect caused by the inclined grooves, provides the necessary clamp the workpiece to the table and prevents accidental occurrence of impact. Vertical grooves are used to adjust the efforts of the clamp depending on the height of the workpiece. The working surface of the dies are polished with sandpaper.
Side of the workpiece is pressed against the guide spring-loaded Cam, which kriaa work surface (C-d) involute of radius R. by Positioning the axis of the Cam to the right from the axis of the cutter at a distance R, you can use evolvente to ensure the clamping of the workpiece tangent to the working surface and opposite the axis of the cutter regardless of the width of the workpiece.
Building evolvente given in many textbooks and practical manuals on drawing, picture and therefore requires no further explanation. More detail on the determination of the magnitude of radius R. the Initial condition is the range of the width b of the processed products. In this case, it is assumed:
The strength member clamp — torsion spring wound on an 11 mm rod wire diameter 2 mm. the Spring is put on an M10 bolt passing through the sleeve and sleeve clamping Cam (section b—B). The lower end of the spring passes through an opening in the casing bottom and the head of the bolt and the upper along the slot and into the hole in the Cam. In the upper end of the sleeve is pressed two pins with a diameter of 3 mm, which included wells nasverlennye bottom of the table around the hole with a diameter of 16 mm, and hold it, hold against twisting.
To the right of the clamp through the slot in the table, fixed focus, preventing the clamp from loosening after handling the product.
Adjustment of pressure on the force needed is as follows. Shifts to the right the way, after loosening the nut. Unscrewing by several turns to the sheep, drops down the sleeve so that the locking pins out of the holes. Applied to guide the workpiece, brings to it a clamp and turn the sleeve, rotating the spring to the desired force. Insert the pins in the nearest holes and tighten nut. Supplied and fixed focus at a distance of 2-3 mm from the clamp.
The rest of the steps on the milling machine are carried out in accordance with the attached instructions.
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