RU2067045C1 - Apparatus and cutter for ornamental working of wooden conical or cylindrical workpieces - Google Patents

Abstract

FIELD: wood-working. SUBSTANCE: apparatus has platform with slides, platform with shaft and blocks, casing, spindle and cutter. Helical ornamental grooving is conducted by shaped cutter in the process of reciprocating motion of workpiece. EFFECT: increased efficiency, wider operational capabilities and enhanced reliability in operation. 3 cl, 4 dwg

Description

 The invention relates to woodworking and is intended for mechanical decorative processing of wood.

Known woodworking machines designed for the manufacture of thread on flat surfaces. The spindle in these cases is made movable in the horizontal plane [1]
The purpose of the invention is the mechanization of the decorative process of conical or cylindrical surfaces (applying a screw thread), without subsequent refinement, using the device shown in figure 1 and the milling cutter (figure 4). In Fig.2 shows a graduated disk, in Fig.3 a part made using three slots.

 The device (Fig. 1) consists of a platform 1 with runners 2, rollers 3 and 4, a platform 5 with a shaft 6 and blocks 7 and 8, a shaft 9 with a rigid fit on it: a sleeve 10, a disk 11, a cartridge 12. The shaft rotates freely in the holder 13, the latch-pointer 14 is also attached here. The cartridge 15 also rotates freely in the holder 16. The cable 17 is attached to the sleeve with one end and the fixing screw 18 to the platform 1, passing through block 7 or 8. The spindle with the cutter 19 is driven into action by a V-belt from an electric motor. The cutter (figure 4) is made of sheet steel with a thickness of 1.5 to 2.0 mm The cutting edges are made in the form of concave elliptic curves symmetrical about the axis of rotation. The runners 20 along which the platform 1 moves are mounted on a base (not shown).

 Holders 13 and 16 can change position. Disk 12 (figure 2) is divided into 3, 4, 5, etc. parts, depending on how many cuts (3, 4, 5.) you need to get.

 The arrows indicate the directions: 21 movements of the platform 1; 22 platform movements 5; 23 rotation of the shaft 9 (workpiece); 24 spindle rotations (milling cutters).

 The device operates as follows.

 The cylindrical billet is mounted in chucks 12 and 15, perpendicular to the direction of the spindle with a mill, which is driven by an electric motor.

 On disk 11, the operating mode is selected. For example, you need to make three cuts. In this case, the latch-pointer is installed in one of three positions and fixes the shaft 9.

 Platform 1 moves towards the spindle so that the cutter enters the workpiece to the required depth. Platform 1 is locked in this position.

 The latch 14 is removed and a rotational movement is supplied to the shaft 9. In this case, the cable 17 is wound on the sleeve 10 through the block 7, and the platform 5 begins to move along the rollers 3, i.e. the workpiece is informed of synchronous rotational-translational motion. Milling cutter 19 leaves a screw cut with zawed edges on the workpiece. After the cut is made, the platform N 1, and then the platform 5 are returned to their original position. The latch is installed at the second mark and the second slot is made, and then the third one is similar.

 Using interchangeable bushings 10 of a larger or smaller diameter, the number of cable wound in one revolution of the shaft 9 is changed, which means that the speed of the forward movement of the workpiece and the inclination of the turns (steeper or shallower) are changed.

 When transferring the cable to block 8, using a milling cutter with reverse sharpening and rotating the spindle 19 and shaft 9 in the opposite direction, you can get a thread in the opposite direction.

 The movable holders of the cartridge 16 and the shaft 13 allow you to process the workpiece conical shape. In this case, the wider part of the workpiece is mounted in the chuck 12, the holder 13 is shifted "from the spindle", and the holder 16 is "to the spindle", and the workpiece is processed as cylindrical.

 The described device in the process showed excellent results. Manufactured parts do not require manual refinement. YYY2

Claims (3)

 1. A device for the mechanical decorative processing of wooden billets of conical or cylindrical shape, comprising a spindle with a cutting tool and a workpiece feed mechanism, characterized in that the workpiece feed mechanism is provided with a shaft with a cable interacting with each other.  2. The device according to p. 1, characterized in that it contains a graduated disk equipped with a latch.  3. A milling cutter for mechanical decorative processing of wooden billets of conical or cylindrical shape, comprising a housing and cutting edges, characterized in that the cutting edges are made in the form of concave elliptic curves symmetrical about the axis of rotation.

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