Replaceable and adjustable cutter bar

Abstract

The utility model belongs to the technical field of machining, and particularly relates to a replaceable and adjustable cutter bar which comprises a cutter bar body, an inclined through hole used for installing a ring groove cutter is formed in one end of the cutter bar body, the included angle between the inclined through hole and the axis of the cutter bar ranges from 40 degrees to 50 degrees, and a first threaded hole communicated with the inclined through hole is formed in the cutter bar. A first threaded hole is formed in the cutter bar, a positioning locking jackscrew is arranged in the first threaded hole and makes contact with the ring groove cutter to achieve positioning and locking of the cutter, an inclined face is arranged on the end face, close to the inclined through hole, of the cutter bar, the included angle between the inclined face and the axis of the cutter bar ranges from 40 degrees to 50 degrees, and two second threaded holes which are perpendicular to the inclined through hole and communicated with the inclined through hole are formed in the inclined face. A lateral locking jackscrew is arranged in the second threaded hole and is in contact with the ring groove cutter, so that the cutter is positioned and locked; when an embedded ring groove structure is machined, the ring groove cutter can avoid a machining interference part to the maximum extent, and it is guaranteed that stress is uniform during cutting.

Description

Technical Field

[0001] This utility model belongs to the field of machining technology, specifically relating to a replaceable and adjustable tool holder for turning embedded annular groove structures. Background Technology

[0002] The external dimensions of the inlaid ring groove structure are smaller than the internal dimensions, causing tool interference during machining. This renders standard ring groove tools inadequate for machining requirements. Each machining operation of this type of structure necessitates the design and customization of non-standard ring groove tools based on the specific dimensions of each part, leading to increased tool inventory and wasted resources. Furthermore, the tool customization cycle is long, sometimes exceeding six months, failing to meet production demands. Due to discrepancies between theoretical and actual machining processes, the first-pass yield is less than 5%, requiring secondary manual sharpening. This significantly reduces tool strength and stability, resulting in highly inconsistent product quality. Utility Model Content

[0003] The technical problem solved by this utility model is to propose a replaceable and adjustable tool holder. A 40°-50° oblique through hole is provided at the end of the tool holder body, and a grooved cutter is installed there. During the machining of embedded grooved structures, the grooved cutter minimizes interference points, ensuring uniform force distribution during cutting. The positioning of the tool holder body and the grooved cutter is adjusted via a set screw locking structure, enabling adjustment of the grooved cutter overhang and quick tool changing. This replaces the traditional method of requiring "one-to-one" custom-designed and manufactured tools for machining different end-face groove structures, achieving the goals of machining end-face groove structures of different specifications and sizes, high tool strength, strong interchangeability, and reliable stability.

[0004] Technical solution of this utility model

[0005] A replaceable and adjustable tool holder includes a tool holder body. One end of the tool holder body has an inclined through hole for mounting a grooved tool. The inclined through hole forms an angle of 40-50° with the axis of the tool holder body. The tool holder body has a first threaded hole communicating with the inclined through hole. A positioning locking screw is installed in the first threaded hole, contacting the grooved tool to achieve positioning and locking of the grooved tool. An inclined surface is provided on the end face of the tool holder body near the inclined through hole, forming an angle of 40-50° with the axis of the tool holder body. Two second threaded holes are provided on the inclined surface, perpendicular to and communicating with the inclined through hole. Lateral locking screws are installed in the second threaded holes, contacting the grooved tool to achieve tool positioning and locking.

[0006] Furthermore, the angle between the oblique through hole and the axis of the tool holder body is 45°.

[0007] Furthermore, the angle between the inclined plane and the axis of the tool holder body is 45°.

[0008] Furthermore, the rake angle of the cutting edge of the annular groove tool is 3°-5°.

[0009] Furthermore, the rake angle of the cutting edge of the annular groove tool is 4°.

[0010] Furthermore, the annular groove tool and the oblique through hole are fitted with a small clearance shaft hole.

[0011] Beneficial effects

[0012] To address the need for ring groove cutters to not only meet the turning requirements of end face ring groove structures but also to achieve rapid and efficient changeover, this utility model proposes a replaceable and adjustable tool holder. A 40°-50° oblique through hole is provided at the end of the tool holder body, and a ring groove cutter is installed thereon. When machining embedded ring groove structures, the ring groove cutter can avoid machining interference parts to the greatest extent and ensure uniform force during cutting.

[0013] By adjusting the positioning of the tool holder body and the annular groove tool through the set screw locking structure, the overhang depth of the annular groove tool can be adjusted and the annular groove tool can be quickly changed. This new type of replaceable and adjustable tool holder replaces the traditional non-standard tool that needs to be customized each time. It achieves the goal of wide applicability of the end face annular groove structure, short preparation and changeover time, and high tool strength. Moreover, the tool holder design is simple, easy to operate, and has low manufacturing cost, and has high promotion value. Attached Figure Description

[0014] Figure 1 This is an isometric drawing of the tool holder of this utility model;

[0015] Figure 2 A schematic diagram of the tool holder of this utility model after the annular groove tool is installed;

[0016] Figure 3 This is a front view of the tool holder of this utility model;

[0017] Figure 4 This is a cross-sectional view of the tool holder of this utility model;

[0018] Figure 5 This is a side view of the tool holder of this utility model;

[0019] Figure 6 This is a schematic diagram of the annular groove cutter of this utility model. Figure 1 ;

[0020] Figure 7 This is a schematic diagram of the annular groove cutter of this utility model. Figure 2 ;

[0021] Figure 8 This is a schematic diagram illustrating the use of the tool holder of this utility model. Figure 1 ;

[0022] Figure 9 This is a schematic diagram illustrating the use of the tool holder of this utility model. Figure 2 ;

[0023] The components include: 1. Tool holder body; 2. Annular groove tool; 3. Positioning and locking set screw; 4. Lateral locking set screw. Detailed Implementation

[0024] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0025] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited in each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] This utility model proposes a replaceable and adjustable tool holder, including a tool holder body 1. One end of the tool holder body 1 has an inclined through hole for mounting a grooved tool 2. The inclined through hole forms a 45° angle with the axis of the tool holder body 1. The tool holder body 1 has a first threaded hole communicating with the inclined through hole. A positioning locking screw 3 is provided in the first threaded hole. The positioning locking screw 3 contacts the grooved tool 2 to achieve positioning and locking of the grooved tool 2. An inclined surface is provided on the end face of the tool holder body 1 near the inclined through hole. The inclined surface forms a 45° angle with the axis of the tool holder body 1. Two second threaded holes are provided on the inclined surface, perpendicular to and communicating with the inclined through hole. Lateral locking screws 4 are provided in the second threaded holes. The lateral locking screws 4 contact the grooved tool 2 to achieve positioning and locking of the grooved tool 2.

[0027] Among them, the annular groove tool 2 and the oblique through hole are fitted with a small clearance shaft hole, and the cutting edge rake angle of the annular groove tool 2 is 3°-5°, preferably 4°.

[0028] This utility model's replaceable and adjustable tool holder, combining the characteristics of various embedded end-face annular groove structures, employs a 45° oblique through hole inside one end of the tool holder body 1 for mounting the annular groove tool 2. This maximizes the avoidance of interference from all large tools and enhances tool strength. After the annular groove tool 2 is mounted in the oblique through hole, it also forms a 45° angle. During machining, the cutting edge of the annular groove tool 2 remains parallel to the machine tool's Z-axis. When the annular groove tool 2 is subjected to cutting force, the cutting force is evenly distributed along the 45° angle and transmitted to the tool holder body 1, increasing the strength of the annular groove tool 2 and reducing vibration during cutting.

[0029] The tool holder of this invention adopts the principle of hole-shaft mating, installing the annular groove tool 2 into the 45° oblique through hole of the tool holder body 1. Strict control of the mating dimensions ensures consistent positioning of the annular groove tool 2 after installation into the tool holder body 1. A set screw 3 is provided on the upper side of the tool holder body 1, which can realize the angular positioning and locking of the annular groove tool 2, and also realize tool overhang adjustment and quick change.

[0030] This invention features a 45° bevel on the end face of the tool holder near the inclined through hole. This 45° bevel reduces cutting interference from the annular groove tool 2, facilitating better chip removal during machining. Two lateral locking screws 3 are mounted on the 45° bevel, with their tightening direction perpendicular to the tool holder of the annular groove tool 2. This design minimizes the force-induced movement of the annular groove tool 2 within the tool holder's positioning hole, achieving a near-welded integrated structure and providing better strength to ensure cutting stability.

[0031] The cutting edge rake angle of the ring groove tool 2 of this utility model is designed to be 3° to 5°, which can meet the cutting of soft materials such as plastics and non-ferrous metals, while also meeting the cutting of difficult-to-machine materials (high temperature alloys, titanium alloys) and materials with high impact forces.

[0032] Depending on the machining conditions, the cutting edge and tool length can be modified to improve tool strength, change tool overhang, and promote smooth chip removal. The tool holder diameter can also be changed to accommodate a wider machining range and increased tool strength.

[0033] The method of using this utility model is as follows:

[0034] The tool holder body 1 and the annular groove cutter 2 are positioned and installed using a small clearance fit between the hole and shaft. The overhang length of the annular groove cutter 2 is controlled according to the external and internal dimensions of the machined inlaid annular groove structure part. For cases where the external dimension of the inlaid annular groove structure is smaller than the internal dimension, the difference between the external and internal dimensions is calculated. Based on half of the calculated difference, the overhang length of the annular groove cutter 2 is adjusted to be no less than half of the difference. This ensures that the annular groove cutter 2 does not interfere with either the internal or external dimensions. After determining the overhang length, a threaded positioning locking screw 3 is used to install the annular groove cutter 2 on the upper end of the tool holder body 1, and its mating position is pre-tightened and fixed. Then, two threaded lateral locking screws 4 are installed on the 45° inclined surface at the end of the tool holder body 1 for pre-tightening. After the annular groove tool 2 is assembled, the tool holder is mounted on the CNC equipment tool post via the rear end of the tool holder body 1. By adjusting the positioning locking screw 3 and the lateral locking screw 4, the cutting edge of the annular groove tool 2 is aligned to ensure that it is parallel to the Z-axis of the machine tool. Then, the positioning locking screw 3 and the two lateral locking screws 4 are tightened and fixed. Because the overhang depth is adjustable, it can meet the machining of inlaid annular groove structures of different sizes. Because the annular groove tool is replaceable, it can meet the machining of different contours.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should be covered within the protection scope of the present invention.

Claims

1. A replaceable and adjustable tool holder, characterized in that, The tool holder includes a tool holder body. One end of the tool holder body has an inclined through hole for mounting a grooved tool. The inclined through hole forms an angle of 40-50° with the axis of the tool holder body. The tool holder body has a first threaded hole communicating with the inclined through hole. A positioning locking screw is installed in the first threaded hole, contacting the grooved tool to achieve positioning and locking of the grooved tool. An inclined surface is provided on the end face of the tool holder body near the inclined through hole, forming an angle of 40-50° with the axis of the tool holder body. Two second threaded holes are provided on the inclined surface, perpendicular to and communicating with the inclined through hole. Lateral locking screws are installed in the second threaded holes, contacting the grooved tool to achieve positioning and locking of the tool.

2. The replaceable and adjustable tool holder according to claim 1, characterized in that, The angle between the oblique through hole and the axis of the tool holder body is 45°.

3. The replaceable and adjustable tool holder according to claim 2, characterized in that, The angle between the inclined plane and the axis of the tool holder body is 45°.

4. The replaceable and adjustable tool holder according to claim 2, characterized in that, The rake angle of the cutting edge of the annular groove tool is 3°-5°.

5. The replaceable and adjustable tool holder according to claim 4, characterized in that, The rake angle of the cutting edge of the annular groove tool is 4°.

6. The replaceable and adjustable tool holder according to claim 2, characterized in that, The annular groove tool and the oblique through hole are fitted with a small clearance shaft hole.

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