Sharp-angle double-edge numerical control woodworking lathe tool

Abstract

The invention discloses a sharp-corner double-edge numerical control woodworking turning tool which mainly comprises a tool bar and a mechanically-clamped tool bit. The cutter bar is formed by machining carbon steel subjected to carbon hardening and tempering. The mechanically-clamped tool bit is designed into forward and reverse bidirectional symmetrical cutting edges, the included angle between forward and reverse main cutting edges is 30-35 degrees, the auxiliary declination angle is zero, and the width of each auxiliary cutting edge is 1-3 mm. The cutting edge inclination angle is zero or negative, the front angle is about 45 degrees, the rear angle is 10-15 degrees, and the auxiliary rear angle is 1-2 degrees. And one or more layers of composite hard and wear-resistant coatings are coated on the surface of the tool bit matrix by adopting a vapor deposition method. The sharp-corner double-edge numerical control woodworking turning tool is easy to cut, low in cost and long in service life, and is particularly suitable for turning various variable-diameter arc shapes in soft non-metal materials such as wood and plastic.

Description

Technical Field

[0001] The present invention relates to the fields of wood processing, machining, and cutting tools, and particularly to a pointed double-edge CNC woodturning tool. Background Art

[0002] Wood turning is more of an art than a technology. The physical properties of natural wood, such as its material, fiber texture, and hardness, vary greatly. Even adjacent parts of the same piece of wood may have significant differences in physical properties. Therefore, to create a perfect wood turning work, the operator continuously communicates with the rotating wood through the eyes, ears, and hands, and uses the turning tool in hand to have a delicate and dynamic continuous dialogue with the wood, so as to shape the wood into the shape imagined in the mind.

[0003] Therefore, traditional wood turning techniques require a relatively high level of skill and artistry from the operator, and the labor intensity of the operator is relatively high, while the processing efficiency of the products is relatively low. Practice has proved that CNC machining technology has an absolute advantage in reducing labor intensity, improving machining accuracy and machining efficiency. For most wood processing, except for individual parts and their technological processes that require manual work, most can be completed relying on CNC machining technology. However, for the clamping type CNC cutting tools for turning soft non-metallic materials such as wood and plastic, especially the research and development of turning tools with easy cutting, low cost, and long life are extremely rare. Summary of the Invention

[0004] The present invention provides a pointed double-edge CNC woodturning tool with easy cutting, low cost, and long life, which is applicable to most processes of turning soft non-metallic materials such as wood and plastic, and is particularly suitable for turning various variable-diameter arc shapes.

[0005] The technical solution adopted to solve the above problems is: a pointed double-edge CNC woodturning tool mainly includes a tool shank and a clamping tool bit; according to the specific requirements of cost control and processing quality, the tool shank of the turning tool is processed and formed from carbon quenched and tempered carbon steel, and the blank raw material of the clamping tool bit is one of tool steel, high-speed steel, or cemented carbide; a hard and wear-resistant coating composed of one or more layers is coated on the surface of the tool bit substrate by chemical vapor deposition.

[0006] Preferably, for the pointed double-edge CNC woodturning tool, the tool bit is designed with a symmetric cutting edge in both forward and reverse directions, the included angle between the main cutting edges in the forward and reverse directions is 30° - 35°, the auxiliary deflection angle is zero, and the width of the auxiliary cutting edge is 1 mm - 3 mm.

[0007] Preferably, for the pointed double-edge CNC woodturning tool, the rake angle is zero or negative.

[0008] Preferably, for the pointed double-edge CNC woodturning tool, the front angle is about 45°.

[0009] Preferably, for the pointed double-edge numerically controlled woodworking turning tool, the clearance angle is 10°-15°.

[0010] Preferably, for the pointed double-edge numerically controlled woodworking turning tool, the secondary clearance angle is 1°-2°.

[0011] The beneficial effects of the present invention are as follows: for the pointed double-edge numerically controlled woodworking turning tool, the front angle of about 45° in the tool tip structure makes it easy to cut soft non-metallic materials such as wood and plastic. When using two-way cutting, it can reduce the running path length of the tool, save processing time and reduce costs. The tool tip is designed into a double-head symmetrical structure, increasing the number of processed products and further reducing costs. Coating one or more layers of composite hard and wear-resistant coatings on the surface of the tool tip substrate by physical vapor deposition can increase the tool tip life by more than one time, thus further reducing costs and improving the quality of the machined surface at the same time. The tip angle of 30°-35° is suitable for turning various variable-diameter arc shapes. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the pointed double-edge numerically controlled woodworking turning tool; In the figure, the markings are: tool tip 1, tool shank 2, pressing plate 3, screw 4 Figure 2 is the front view of the tool tip structure; In the figure, the markings are: tool tip substrate 5, hard coating 6 Figure 3 is the top view of the tool tip structure; Figure 4 is the side view of the tool tip structure. Embodiments

[0013] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0014] For the pointed double-edge numerically controlled woodworking turning tool, in the embodiment Figure 1 the tool tip 1 is fastened to the tool shank 2 with the screw 4 and the pressing plate 3. According to the processing requirements, the tool shank 2 is designed into a structure with an inclination angle of zero or negative value.

[0015] Figure 2 is the front view of the tool tip structure in the embodiment. The turning tool tip is designed with a positive and negative two-way symmetrical cutting edge, and the V-shaped groove is 90° to ensure a front angle of 45° and a clearance angle of 11°. And the ion plating technology in physical vapor deposition is used to coat one or more layers of composite hard and wear-resistant coatings on the surface of the tool tip substrate. In this embodiment, it is preferably to coat a 2μm-5μm CrCN hard wear-resistant composite coating.

[0016] Figure 3 is the top view of the tool tip structure in the embodiment. The length of the secondary cutting edge is 1mm, and the tip angle is 30°.

[0017] Figure 4It is a side view of the tool tip structure in the embodiment. The secondary clearance angle is 2°, which is beneficial to increasing the strength of the tool tip. The edge inclination angle is 15°, which is beneficial to preventing wood fibers from winding around the tool and improving the machinability and the surface quality of the machined surface.

[0018] The embodiment described in the present invention is only one of the preferred embodiments. All the design concepts in the sharp-corner double-edge CNC woodturning tool described in the present invention, the technical solutions of coating the sharp-corner double-edge CNC woodturning tool by physical vapor deposition method and their embodiments cannot deviate from the protection scope of the present invention.

Claims

1. A sharp-corner double-edge CNC woodworking lathe tool, mainly comprising: Tool shank and indexable insert; the tool shank of the turning tool is processed from carbon quenched and tempered carbon steel, and the blank raw material of the indexable insert is one of tool steel, high-speed steel or cemented carbide; one or more layers of composite hard and wear-resistant coatings are coated on the surface of the insert substrate by chemical vapor deposition.

2. The sharp-corner double-edge CNC woodworking lathe tool according to claim 1, characterized in that The insert is designed with symmetric cutting edges in both forward and reverse directions, the included angle between the main cutting edges in the forward and reverse directions is 30° to 35°, the auxiliary deflection angle is zero, and the width of the auxiliary cutting edge is 1 mm to 3 mm.

3. The sharp-corner double-edge CNC woodworking lathe tool according to claim 1, characterized in that The rake angle is zero or negative.

4. The sharp-corner double-edge CNC woodworking lathe tool according to claim 1, characterized in that The front angle is 45°.

5. The sharp-corner double-edge CNC woodworking lathe tool according to claim 1, characterized in that The back angle is 10° to 15°.

6. The sharp-corner double-edge CNC woodworking lathe tool according to claim 1, characterized in that The auxiliary back angle is 1° to 2°.

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