A new type of numerical control lathe cutting-off tool

Abstract

The utility model discloses a novel numerical control lathe cutting knife, and the knife holder central part is provided with the square hole of the through slot form, and the tool bit is installed in the square hole, and the square hole still is installed with the support plate for supporting the tool bit. The one end of tool bit and support plate is from the square hole same end and projects, and the tool bit projected length is greater than the support plate projected length. The upper side of knife holder is provided with a plurality of fastening screw holes that are communicated with the square hole and are installed with fastening screw in fastening screw. The left and right two sides of knife holder are provided with a plurality of fastening bolt holes that are communicated with the square hole and are installed with fastening bolt in fastening bolt. The tool bit projected length of the utility model can be accurately adjusted, thereby can satisfy different cutting stroke demand. When the tool bit appears abrasion or breaks, can through the adjustment tool bit projected length and cooperate the grinding and restore the use performance, thereby has reduced the tool bit use cost.

Description

Technical Field

[0001] This utility model relates to the field of CNC lathe cutting tools, specifically to a CNC lathe parting tool. Background Technology

[0002] CNC lathe parting tools are commonly used turning tools on CNC lathes, mainly used for grooving or cutting off workpieces. Existing CNC lathe parting tools have the following problems: First, the cutting stroke is short, generally only cutting 20mm deep, and the cutting stroke is fixed and not adjustable; second, the tool head is difficult to repair after wear or breakage, requiring replacement with a new tool head, increasing tooling costs.

[0003] Therefore, developing a CNC lathe grooving and cutting tool with a simple structure, long cutting stroke, precise adjustment of cutting stroke, long tool life, and low cost is of great practical significance. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a new type of CNC lathe cutting tool that can adjust the cutting stroke and repair the tool head, thereby reducing the cost of tool head use.

[0005] The technical solution of this utility model is as follows: A novel CNC lathe cutting tool includes a tool holder for mounting the cutting head, wherein a square hole in the form of a through slot is provided in the center of the tool holder; the cutting head is installed in the square hole, and a support plate for supporting the cutting head is also installed in the square hole; one end of the cutting head and the support plate extends out from the same end of the square hole, and the extension length of the cutting head is greater than the extension length of the support plate (3); several fastening screw holes communicating with the square hole are provided on the upper side of the tool holder, and fastening screws are installed in the fastening screws; the inner end of the fastening screw abuts against the upper side of the cutting head, and the support plate is pressed against the lower side of the square hole through the cutting head; several fastening bolt holes communicating with the square hole are provided on the left and right sides of the tool holder, and fastening bolts are installed in the fastening bolts; the fastening bolts press the cutting head from the left and right sides.

[0006] Preferably, the extended end of the support plate has a rounded corner that is tangent to the bottom surface of the support plate.

[0007] Preferably, the inner end of the fastening bolt and the inner end of the fastening screw are respectively equipped with anti-slip pads.

[0008] Compared with the prior art, the present invention has the following advantages: First, the extension length of the cutting head in this invention can be precisely adjusted to meet different cutting stroke requirements. Second, the cutting head of this invention has a longer service life. When the cutting head wears or breaks, its performance can be restored by adjusting the extension length and grinding, thereby extending its service life and reducing the cost of using the cutting head. Third, this invention also features a simple structure, reliable performance, and low cost. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a schematic diagram of the internal (sectional) structure of the present invention; In the diagram: 1. Tool holder; 2. Fastening bolt; 3. Support plate; 4. Tool head; 5. Fastening screw; 6. Anti-slip pad. Detailed Implementation

[0010] The present invention will now be described in detail with reference to the embodiments and accompanying drawings.

[0011] like Figure 1 , Figure 2 and Figure 3 This utility model of a CNC lathe cutting tool includes a tool holder 1. In this embodiment, the tool holder 1 is rectangular. A square hole in the form of a through slot is formed in the center of the tool holder 1. A cutting head 4 and a support plate 3 for supporting the cutting head 4 are installed in this square hole. Several fastening screw holes communicating with the square hole are formed on the upper side of the tool holder 1, and fastening screws 5 are installed inside the fastening screws. The inner end of the fastening screw 5 abuts against the upper side of the cutting head 4, and the cutting head 4 presses the support plate 3 against the lower side of the square hole. Several fastening bolt holes communicating with the square hole are formed on the left and right sides of the tool holder 1, and fastening bolts 2 are installed inside the fastening bolts. The fastening bolts 2 press against the cutting head 4 from both sides.

[0012] The blade 4 and the support plate 3 both extend from the same end of the square hole (both ends are shown on the left side of the diagram), and the extension length of the blade 4 is greater than the extension length of the support plate 3.

[0013] Furthermore, the extended end of the support plate 3 has a rounded corner tangent to the lower surface of the support plate 3. The purpose of this design is to reduce space occupation while ensuring support strength, and to facilitate the movement of the tool holder 1 and the removal of cutting chips during cutting.

[0014] Furthermore, the inner ends of the fastening bolt 2 and the fastening screw 5 are respectively equipped with anti-slip pads 6, which are used to increase the friction coefficient between the inner end of the fastening bolt 2 and the cutter head 4, and between the inner end of the fastening screw 5 and the cutter head 4, so as to prevent the support plate 3 and the cutter head 4 from being displaced relative to the cutter holder 1 when subjected to force.

[0015] In specific manufacturing, the tool holder 1 has the following dimensions: 32mm × 32mm × 1500mm. A 5mm × 15mm × 1500mm square hole is machined along the length of the tool holder 1 at its center. Five M4 screw holes communicating with the square hole are machined at equal intervals downwards on the upper side of the tool holder 1. Four M8 bolt holes communicating with the square hole are machined at equal intervals inwards on the left and right sides of the tool holder 1. The positions of the M4 screw holes and M8 bolt holes are as follows: Figure 1 and Figure 2 .

[0016] The cutter head 4 is a 5mm×5mm×1600mm stainless steel strip, with its front end (cutting edge) ground at a 5-10 degree angle. The support plate 3 is 5mm thick, 1600mm long, and 10mm high, with a rounded corner at its front end with a bending radius of 85mm, the rounded corner being tangent to the bottom surface of the support plate 3. The cutter head 4 and support plate 3 are installed in the square hole of the cutter holder 1. The fastening screw 5 is an M4 socket head cap screw, and the fastening bolt 2 is an M8 external hex bolt. The fastening screw 5 and fastening bolt 2 are respectively installed in the M4 screw hole and the M8 bolt hole.

[0017] The following are examples of the assembly and use methods of this utility model.

[0018] First, position the side with the fastening screws of the tool holder 1 facing upwards and the rounded corner side of the support plate 3 facing downwards. Place the support plate 3 into the square hole of the tool holder 1, and then place the cutter head 4 into the upper part of the support plate 3 within the square hole. Determine the length of the cutter head 4 extending out of the tool holder 1 based on the required groove depth and the radius of the part to be cut. Then determine the length of the support plate 3 extending out of the tool holder 1. The extension length of the support plate 3 is generally 10-15mm less than the extension length of the cutter head 4. Tighten the fastening screws 5 and 2 so that the inner ends of the fastening screws 5 and 2 press against the cutter head 4, completing the assembly.

[0019] After assembly, this utility model is mounted on a CNC lathe tool post for grooving or cutting parts. When the tool head 4 is slightly worn, it can be directly modified on the CNC lathe without disassembly. When the tool head 4 is heavily worn or the tip of the tool head is broken, loosen the fastening screw 5 and fastening bolt 2, pull the tool head 4 and support plate 3 to the required length, and then tighten the fastening screw 5 and fastening bolt 2 again. The inclination angle of the tool head 4 can be ground by hand on a grinding machine using the tool holder 1, or a cylindrical grinding wheel can be clamped on the CNC lathe chuck and the inclination angle of the tool head 4 can be ground using a CNC lathe.

Claims

1. A novel CNC lathe cutting tool, comprising a tool holder (1) for mounting the tool head (4), characterized in that: The tool holder (1) has a square hole in the form of a through slot in the center; the tool head (4) is installed in the square hole, and a support plate (3) for supporting the tool head (4) is also installed in the square hole; one end of the tool head (4) and the support plate (3) extends out from the same end of the square hole, and the extension length of the tool head (4) is greater than the extension length of the support plate (3); several fastening screw holes communicating with the square hole are opened on the upper side of the tool holder (1), and fastening screws (5) are installed in the fastening screws; the inner end of the fastening screw (5) abuts against the upper side of the tool head (4), and the support plate (3) is pressed against the lower side of the square hole through the tool head (4); several fastening bolt holes communicating with the square hole are opened on the left and right sides of the tool holder (1), and fastening bolts (2) are installed in the fastening bolts; the fastening bolts (2) press the tool head (4) from the left and right sides.

2. The novel CNC lathe cutting tool as described in claim 1, characterized in that: The extended end of the support plate (3) has a rounded corner that is tangent to the bottom surface of the support plate (3).

3. The novel CNC lathe cutting tool as described in claim 1 or 2, characterized in that: The inner end of the fastening bolt (2) and the inner end of the fastening screw (5) are respectively equipped with anti-slip pads (6).

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