A deposition tooling fixture for a CVD diamond coated cutting tool

Abstract

This utility model discloses a deposition fixture for CVD diamond-coated tools, comprising: a base disposed within a furnace body, with mounting columns symmetrically arranged on the sides of the base; and a mounting groove at the bottom of the base that mates with the furnace body. A hot wire is mounted on the mounting columns; a placement platform is mounted on the base for placing the tool, the platform including a tool-placement disc with several tool-placement slots, the hot wire passing through the platform and positioned outside the slots. The placement platform includes a base plate rotatably fitted with the base, with a receiving groove on the base, into which the tool-placement disc is placed. The placement platform includes multiple interconnected base plates, the upper base plate being connected to the lower base plate via a connecting column. The connecting column and the base plate are rotatably fitted. A mounting bracket is slidably mounted on the mounting columns, with several elastic tabs on the mounting bracket, and the hot wire is mounted on the elastic tabs. This achieves consistent spacing between the hot wire and the tool, ensuring stable coating quality.

Description

Technical Field

[0001] This utility model relates to the field of tool processing technology, specifically to a deposition fixture for CVD diamond coated tools. Background Technology

[0002] In the manufacturing process, to better meet machining requirements, cutting tools often use metals such as high-speed steel and cemented carbide as the base material. However, when these metal tools are used to machine difficult-to-process materials, problems such as short tool life and low machining accuracy frequently occur. Chemical vapor deposition (CVD) diamond thin film coated tools, due to their superior properties such as high hardness, high elastic modulus, extremely high thermal conductivity, good self-lubrication, and chemical stability, are considered ideal tools for solving various machining problems.

[0003] The existing tooling uses a bolt-fastened adjustment mechanism, requiring manual and repeated adjustments to the distance between the heating wire and the tool each time the tool specification is changed, with each adjustment taking 30 to 60 minutes. The positioning method relies on the operator's experience, and the spacing between workpieces in the same batch can fluctuate by ±1.5mm, seriously affecting the stability of coating quality. Utility Model Content

[0004] The purpose of this invention is to provide a deposition fixture for CVD diamond coated tools to solve the problems of complex adjustment, low precision, and inability to guarantee stable coating quality of existing fixtures.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a deposition fixture for CVD diamond-coated tools, comprising:

[0006] The base is installed inside the furnace body, and mounting columns are symmetrically arranged on the sides of the base.

[0007] The heating element is mounted on the mounting column;

[0008] A placement platform, mounted on a base, is used to place cutting tools. The placement platform includes a tool placement disc with several tool placement slots. A heating wire passes through the placement platform and is positioned outside the tool placement slots.

[0009] As a further improvement to the above technical solution:

[0010] The base has a mounting groove at its bottom that mates with the furnace body.

[0011] The placement platform includes a base plate that rotates with the base, and the base plate is provided with a receiving groove, in which the cutting disc is disposed.

[0012] The placement platform includes multiple connected base plates, with the upper base plate connected to the lower base plate via connecting columns.

[0013] The connecting column and the base plate are rotated together.

[0014] The mounting column is equipped with a sliding mounting bracket, and the mounting bracket is equipped with several elastic tabs. The heating wire is mounted on the elastic tabs.

[0015] The mounting column is threaded, the mounting bracket is mounted on the mounting column by a nut, the mounting bracket is provided with a number of mounting holes, and the elastic lever is mounted in the mounting holes by a bolt assembly.

[0016] The mounting column is equipped with a graduated scale.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] High precision and stability: Through the scale and thread design, the distance between the hot wire and the tool is precisely adjusted and highly consistent, ensuring the stability of the coating process and the coating quality.

[0019] The flexible fins are made of high elastic modulus alloy material, which effectively avoids the loosening phenomenon caused by high temperature thermal expansion and further improves the straightness and stability of the hot wire.

[0020] Flexibility and adaptability: The placement table features a modular design, allowing for the replacement of different sized tool holders to accommodate the machining needs of tools with varying shapes and sizes. Multiple interconnected base plates and a rotating mechanism enable adjustable tool angles, meeting the requirements of different coating processes.

[0021] High efficiency and convenience: The base has a mounting slot at the bottom, allowing for quick fixation in CVD diamond coating equipment, improving the efficiency of equipment installation and replacement. The mounting bracket is fixed with bolts and nuts and can be adjusted vertically to accommodate tools of different lengths, making operation simple.

[0022] Optimize coating quality: By precisely controlling the distance and angle between the hot wire and the cutting tool, uniform deposition of the diamond coating is achieved, improving the coating's adhesion and wear resistance.

[0023] Cost reduction and efficiency improvement: This fixture is rationally designed, compact in structure, and easy to manufacture and maintain, thus reducing production costs. At the same time, its high efficiency and stability improve the efficiency and production benefits of CVD diamond coating preparation.

[0024] In summary, the deposition fixture for the CVD diamond-coated tool in this embodiment has significant advantages in terms of precision, stability, flexibility, efficiency, high-temperature resistance, and coating quality, providing reliable technical support for the preparation of CVD diamond coatings. Attached Figure Description

[0025] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model;

[0026] Figure 2 This is the second three-dimensional structural schematic diagram of the present invention;

[0027] Figure 3 This is a schematic diagram of the main structure of this utility model;

[0028] Figure 4 This is a schematic diagram of the exploded structure of this utility model.

[0029] Reference numerals: 1. Base; 11. Mounting column; 2. Hot wire; 3. Placement platform; 31. Tool holder; 311. Tool slot; 32. Base plate; 321. Receiving slot; 33. Connecting column; 4. Tool; 5. Mounting bracket; 6. Flexible lever. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicating orientation or position, are based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] like Figures 1 to 4 As shown, the deposition fixture for the CVD diamond-coated tool in this embodiment includes:

[0035] The base 1 is set inside the furnace body, and the mounting columns 11 are symmetrically arranged on the side of the base 1. The mounting columns 11 are equipped with scales. Since the mounting columns 11 are threaded, the scales can be designed to be separate from the mounting columns 11, that is, the scales can be set on one side of the mounting columns 11, or the scales can be directly set on the mounting columns 11.

[0036] Hot wire 2 is mounted on mounting column 11. Hot wire 2 is made of tungsten wire and serves as the core heating element for hot-wire chemical vapor deposition (HFCVD). It excites the reaction gas at high temperatures (above 2000℃) to achieve the deposition of diamond coating. The tungsten wire is taut by an elastic iron sheet to ensure its straightness and stability at high temperatures.

[0037] The placement platform 3 is installed on the base 1 and is used to place the cutting tool 4. The placement platform 3 includes a cutting tool plate 31, which is provided with a plurality of cutting tool grooves 311. The hot wire 2 passes through the placement platform 3 and is located on the outside of the cutting tool grooves 311.

[0038] The base 1 and the placement platform 3 are made of high-temperature resistant materials with low thermal expansion coefficients (such as molybdenum alloys or ceramic matrix composites) to reduce the impact of thermal deformation on coating quality.

[0039] The base 1 has a mounting groove at its bottom that mates with the furnace body. It can be quickly fixed in a domestically produced CVD diamond coating preparation equipment (bias-enhanced HFCVD equipment). Four mounting columns 11 are located above the base 1. Each mounting column 11 has an integrated graduated scale (0.05mm resolution). The base 1 has a raised center and circular grooves around its perimeter for mounting and fixing the placement platform 3, allowing for flexible rotation of the platform 3. The shape of the mounting groove matches the furnace body placement position, enabling rapid positioning.

[0040] The placement table 3 includes a base plate 32 that rotatably engages with the base 1. The base plate 32 is provided with a receiving groove 321, and the tool holder 31 is disposed in the receiving groove 321. The tool holder 31 can be replaced according to the tool, adapting to the machining of tools of different sizes and shapes. The different tool holders 31 are the same except for the size of the tool holder groove 311.

[0041] The placement platform 3 includes multiple connected base plates 32, with the upper base plate 32 connected to the lower base plate 32 via connecting posts 33.

[0042] The connecting column 33 and the base plate 32 are rotatably fitted. The base plate 32 is used to support the cutter head and can adjust the angle of the cutter to meet the needs of different coating processes. The rotatable fit means that a bearing (not shown in the figure) is provided on the base plate 32, and the connecting column 33 is inserted into the bearing, so that the connecting column 33 can rotate. For multi-layer structures, this design means that the rotation of one layer does not affect the position of other layers.

[0043] A mounting bracket 5 is slidably mounted on the mounting column 11. Several elastic tabs 6 are mounted on the mounting bracket 5, and the hot wire 2 is mounted on the elastic tabs 6. The elastic tabs 6 are elastic iron sheets used to fix the hot wire 2 (tungsten wire is used here). Their elasticity keeps the tungsten wire taut, preventing loosening due to thermal expansion at high temperatures and ensuring the stability of the distance between the hot wire and the tool during the coating process. The elastic tabs 6 are made of a high-modulus-elastic alloy material (such as beryllium copper alloy) to ensure good elasticity at high temperatures.

[0044] The mounting column 11 is threaded, and the mounting bracket 5 is installed on the mounting column 11 via nuts. The mounting bracket 5 has several mounting holes, and the elastic lever 6 is installed in these holes via bolt assemblies. The mounting bracket 5 is fixed to the mounting column 11 by bolts and nuts, which also serve to secure the elastic lever 6 to the mounting bracket 5. The bolts and nuts are made of high-temperature resistant materials (such as stainless steel or nickel-based alloys) to ensure long-term stable operation in high-temperature environments. The mounting bracket 5 is connected to the mounting column 11 via fixing nuts, allowing for vertical adjustment to accommodate tools of different lengths. The several mounting holes allow for selection of appropriate installation positions based on the tool requirements, and also allow for fixing and fine-tuning of the angle of the elastic lever 6.

[0045] In use, place the tool 4 in the tool slot 311 of the tool holder 31, then place the tool holder 31 on the base plate 32. Next, according to the tool position, install the mounting bracket 5 on the mounting column 11 and install the elastic lever 6. Hang both ends of the hot wire 2 on the elastic lever 6 and adjust to a suitable height. Adjust both ends with the scale to make the height of both sides consistent. Then, rotate the base plate 32 to make the distance between the tool 4 and the hot wire 2 consistent to ensure the processing effect.

[0046] Compared to existing multi-position adjustment technologies, this invention adopts a modular design, allowing for positional consistency adjustment via rotation, reducing adjustment errors and shortening adjustment time. It can adapt to the processing of products of different sizes by changing the cutter head, improving adaptability. This invention uses multi-layer placement, enabling simultaneous processing of batches of cutters, thus improving processing efficiency.

[0047] The above description is merely an embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It will be apparent to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A deposition fixture for CVD diamond-coated tools, characterized in that, include: The base (1) is set inside the furnace body, and the mounting columns (11) are symmetrically arranged on the sides of the base (1); A heating wire (2) is mounted on a mounting column (11); A placement platform (3) is installed on a base (1) for placing a cutting tool (4). The placement platform (3) includes a cutting tool tray (31) with several cutting tool slots (311) on it. The hot wire (2) passes through the placement platform (3) and is located outside the cutting tool slots (311).

2. The deposition fixture for CVD diamond-coated tools according to claim 1, characterized in that: The base (1) has an installation groove at the bottom that matches the furnace body.

3. The deposition fixture for CVD diamond-coated tools according to claim 1, characterized in that: The placement platform (3) includes a base plate (32) that rotates with the base (1). The base plate (32) is provided with a receiving groove (321), and the cutter disc (31) is disposed in the receiving groove (321).

4. The deposition fixture for CVD diamond-coated tools according to claim 1, characterized in that: The placement platform (3) includes multiple sets of connected base plates (32), with the upper base plate (32) connected to the lower base plate (32) via a connecting column (33).

5. The deposition fixture for CVD diamond-coated tools according to claim 4, characterized in that: The connecting column (33) and the base plate (32) are rotatably fitted together.

6. The deposition fixture for CVD diamond-coated tools according to claim 1, characterized in that: The mounting column (11) is provided with a sliding mounting bracket (5), and the mounting bracket (5) is provided with a plurality of elastic paddles (6), and the hot wire (2) is mounted on the elastic paddles (6).

7. The deposition fixture for CVD diamond-coated tools according to claim 6, characterized in that: The mounting column (11) is provided with threads, the mounting bracket (5) is installed on the mounting column (11) by means of nuts, the mounting bracket (5) is provided with a number of mounting holes, and the elastic lever (6) is installed in the mounting holes by means of bolt assembly.

8. The deposition fixture for CVD diamond-coated tools according to claim 1, characterized in that: The mounting column (11) is equipped with a scale.

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