The film describes the design and operating principles of machines for mechanical processing of wooden parts.
The concept of the milling process in woodworking.
A cartoon explaining the milling process and the main mistakes when installing and fixing knives.
Chipping of the cutting edge of the knife.
The surface of the wood when milling with blunt knives.
Therefore, knives are sharpened 2-3 times per shift on special machines.
Characteristics of a correctly sharpened knife.
Sharpening the cutter.
Samples of cutters of various designs.
Samples of profiles obtained using such cutters.
Single-spindle milling machine with manual feed.
Components of the machine.
Milling on individual sections of the workpiece is carried out along the stops.
For safety, short and thin bars are fed with a pusher.
Upper and side stops are used to process thin workpieces.
The sequence of operations when setting up the machine, for example, for curvilinear processing along a ring.
The machine is usually serviced by one person, but when working with a template, it is advisable to assign an auxiliary worker to perform secondary operations.
To make work easier in production, serial automatic feeders are widely used.
Machine maintenance, lubrication once per shift of spindle bearings.
General lubrication of the machine is carried out within the timeframes specified in the lubrication chart.
The following machine is a modification of the previous one and differs from it by the presence of an automatic feeder.
Cartoon explaining the design of the automatic feeder.
A slider support is used to secure the part.
The template, according to which the processing is carried out, has a perforated metal tape or chain at the end.
An asterisk or automatic feeder moves the template with the workpiece along this chain or tape, rolling it along the contour.
Milling machines equipped with a special device with a tenoning carriage are used to cut tenons and lugs.
Sample of a part with lugs.
In a box tenoning machine, the cutting tool is a set of cutters.
Samples of cut tenons.
Dovetail tenoning machine.
Milling, Milling cutter, Automatic feeder, Spikes, Eyelets
Working tools of the tenoning machine.
The machine allows processing several workpieces simultaneously and they are fixed with a pneumatic clamp.
Operation of a double-sided tenoning machine.
Samples of parts after processing.
Cartoon showing the readjustment of the machine.
Raising the clamping device.
Wiring of the tenoning heads.
In addition to the tenoning heads, both sides of the machine are equipped with eye disks and end saws.
Cartoon showing the adjustment of the cutting tool.
Remote control for starting the machine heads and the mechanism for feeding workpieces.
The feed of parts is carried out by a chain conveyor with stops.
Planed and milled parts have an insufficiently smooth surface.
Grinding a part.
The concept of the grinding process.
Cartoon showing the grinding process.
Samples of sanding paper.
Coarse-grained sandpaper is used to remove large irregularities, and fine-grained sandpaper is used for final grinding.
When the pressure of the sandpaper on the part increases, grinding speeds up, but the surface purity decreases.
The sandpaper should be replaced periodically.
On disk machines, the sandpaper pre-moistened with water is stretched onto the disk and secured with a rim.
On cylinder machines, the sandpaper is secured to the ends of the drums with special ties.
On belt machines, it is connected into an endless belt and stretched with a tension pulley along the guides.
Operation of a belt grinding machine with automatic program control.
A group of disk grinding machines.
A vertical disk-reel, it is designed for grinding concave surfaces and has an axial oscillatory motion in addition to rotation.
Cylinders of multi-drum grinding machines also have an axial movement in addition to rotation.
Oscillation or rotational axial movement improves the quality of processing.
Dust collection unit.
Grinding is the last operation in the mechanical processing of wooden blanks.
Now the parts can be varnished or polished.
Assembly shop in furniture production.
Tenoning machine, Grinding, Sanding paper, Oscillation