RU2077429C1 - Gear to cut tread on flat wooden surfaces - Google Patents

Abstract

FIELD: decorative machining of wood. SUBSTANCE: gear to cut thread on flat wooden surfaces has base, platform coupled to it and spindle head. It also includes three additional platforms. Platforms coupled to base and one of additional platforms can total. Two others are mounted on rotary platforms for longitudinal movement along the later. In this case platform mounted for longitudinal movement on platform coupled to base is coupled to second rotary platform by means of shaft. Spindle can move in vertical plane. Attachment table is made of upper and lower parts which can rotate. EFFECT: enhanced functional efficiency. 3 cl, 4 dwg

Description

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

 Known woodworking walls that perform threading on flat surfaces, and the spindle of the machine is made movable in the horizontal plane and pivotally connected to the cam mechanism (1).

 The purpose of the invention is the simplification of the processing mechanism, the universalization of the device.

 This goal is achieved in that the device for threading on flat wooden surfaces, containing a base, a platform associated with it, a fixing table and a spindle head, according to the invention, has an additional three platforms, moreover, the platform associated with the base and one of the additional platforms are made rotating, and the other two are placed on rotating platforms with the possibility of translational movement along the latter, while the platform installed with the possibility of translational movement on the platform associated with the base is connected via a shaft to a second rotating platform, and the spindle head is movable in a vertical plane.

 The fixing table is made of upper and lower parts, is equipped with a latch and its upper part is made rotating.

 The cutting edges of the spindle head cutter are made in the form of concave curves symmetrical about the axis of rotation.

 Figure 1 shows a General view of the device; in FIG. 2 table; in FIG. 3 - three types of cutters and in FIG. 4 separate, simple thread contour options.

 The device (Fig. 1) consists of a base 1 to which a rotating platform 4 is attached using a shaft 2 entering a hole 3. A platform 5 is progressively moving along a platform 4, to which a rotating platform is attached using a shaft 6 entering a hole 7 9, to which the lower part of the table (10a) with a latch 12 is rigidly fixed with screws 11.

 The table (Fig. 2) consists of two parts, made in the form of plates: the lower 10a with the lock 12 and the upper 10b with holes 13 located around the circumference at the same distance from each other. The upper part of the table with a smaller diameter enters the lower part and rotates on the shaft (not shown in Fig.) So that the holes 13 are against the latch 12. The latch, entering the hole, rigidly fixes the upper part of the table relative to the bottom. The spindle with a mill (Fig. 1-4) is driven by an electric motor through a V-belt and is made movable in a vertical plane (like a drilling machine).

 The cutter (Fig. 3) is made of sheet steel 1-1.2 mm thick. The cutting part is sharpened on both sides to the right or left, depending on the direction of rotation of the spindle. During rotation, the cutting part is a cone with a concave lateral surface (Fig. 3b), a hemisphere (Fig. 3a), a cylinder (Fig. 3c).

 The milling cutters shown in FIG. 3a, 3b, are intended for threading, the milling cutter in FIG. 3c to select the background.

 The arrows indicate the directions: I movement of the platform 5; II movement of the platform 9; III rotation of the platform 4; IV rotation of the platform 8; V - rotation of the spindle with a mill; VI spindle movements.

 The axis of rotation of the spindle coincides with the axis of rotation of the platform 4.

 Description of the operation of the device.

 The flat workpiece is rigidly attached to the top of the table 10b. Using a moving platform 5, the radius of the circle (arc) is selected. It is equal to the distance from the axis of rotation of the platform 8 to the axis of rotation of the platform 4. The platform 5 is fixed in the desired position. When moving the platform 9 determines the location of the circle (arc) on the workpiece. Platform 9 is fixed.

 The cutter 14 is included in the workpiece to the required depth and the device is set in motion. On the workpiece, a slot remains in the form of a circle (arc) of a given size and position.

 When performing the circuits of the type depicted in FIG. 4 (a, b, c), each subsequent arc is performed after the rotation of the upper part of the table 10a. So, when performing FIG. 4a, the table is fixed in every second hole, while performing FIG. 4b in every fourth. When performing arc 4g, arcs from one center are drawn, only the radius changes. Other, more complex contour options are also possible.

 To make a cut in the form of a straight line, the platforms 4, 8, 9 are fixed, and the cut is performed using the platform 5.

 The device is installed on a woodworking machine and in the process showed excellent results. Manufactured parts do not require manual refinement.

Claims (1)

 1 1. A device for performing threading on flat wooden surfaces, comprising a base, an associated platform, a fixing table and a spindle head, characterized in that it has an additional three platforms, the platform connected to the base and one of the additional platforms being made rotating and the other two are placed on rotating platforms with the possibility of translational movement along the latter, while the platform installed with the possibility of translational movement on the platform associated with the base it is connected by means of a shaft to a second rotating platform, and the spindle head is movable in a vertical plane.2 2. The device according to claim 1, characterized in that the mounting table is made of upper and lower parts, is equipped with a latch and the upper part is made rotating.2 3. The device according to claim 1, characterized in that the cutting edges of the milling cutter of the spindle head are made in the form of concave curves symmetrical about the axis of rotation.

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