Multi-section asymmetric composite fine boring cutter
Through the design of a multi-stage asymmetric composite fine boring tool, multiple fine boring units and step structures are adopted, the accuracy error problem caused by multiple operations of key parts of the diesel engine is solved, and efficient and accurate machining effects are achieved.
Patent Information
- Application Number
- CN202422157891.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-04
AI Technical Summary
The existing tools generally only have one fine boring unit, making it difficult to efficiently process key parts of diesel engines such as cylinder bores, spindle bores, etc., especially large diameter bores, which are difficult to process, and multiple operations lead to large accuracy errors.
A multi-stage asymmetric composite fine boring tool is designed, and multiple fine boring units are installed on the step part. By setting processing sections of different diameters and connecting them into one, the rotation is controlled by a CNC machine tool to achieve efficient machining of multiple parts.
It reduces the accuracy error caused by multiple boring, metering and clamping operations, improves processing efficiency, reduces labor intensity and saves production costs.
Smart Images
Figure CN223160083U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of CNC machine tool tools, and particularly relates to a multi-segment asymmetric composite fine boring tool. Background Art
[0002] At present, the processing equipment for key parts of diesel engines has transitioned from traditional special-purpose machines to CNC machine tools, and the tools used have also transitioned from ordinary turning and boring tools to complex composite tools.
[0003] Existing tools generally have only one fine boring unit, while the key part of the diesel engine, the "engine block", has parts such as cylinder holes, main shaft holes, and camshafts. One fine boring unit needs to work multiple times to complete the processing of multiple parts. Especially for large-diameter holes, it is more difficult. It is even more difficult to machine micron-level holes such as H7 and H6. It is a high-difficulty process research project to rely only on adjusting one blade (or blade seat) for processing. Content of the Utility Model
[0004] The purpose of the utility model is to provide a multi-segment asymmetric composite fine boring tool to solve the above technical problems.
[0005] To achieve the above purpose, the specific technical solution of a multi-segment asymmetric composite fine boring tool of the utility model is as follows:
[0006] A multi-segment asymmetric composite fine boring tool includes a tool shank and a tool body. The tool body is fixedly installed on the tool shank, and the tool shank is connected to the main shaft of the CNC machine tool and is controlled by the CNC machine tool to rotate. The tool body has one or more stepped parts, and the stepped parts have tool head mounting holes. A plurality of fine boring units are installed in the tool head mounting holes to simultaneously process the diesel engine block.
[0007] Further, the stepped part includes one or more.
[0008] Further, the number of the fine boring units is three.
[0009] Further, the tool body is of a triangular structure.
[0010] Further, the main rake angle of the tool body is θ = ctgL / D, where L and D are a fitted straight line, and the straight line equation is AX + BY + C = 0. Among them, A, B, and C are respectively calculated from the outer diameter and depth of a plurality of fine boring units.
[0011] Further, a plurality of fine boring units are respectively installed on different stepped parts.
[0012] Furthermore, each fine boring unit includes a cutting head and an adjusting screw. The cutting head is fixedly installed in the cutting head mounting hole by the adjusting screw, and the adjusting screw is used to adjust the installation depth of the cutting head, thereby adjusting the machining diameter of the cutting head.
[0013] Furthermore, there are three of the stepped portions.
[0014] A multi-stage asymmetric composite fine boring tool of the present utility model has the following advantages: By setting machining segments with different diameters to meet the machining requirements of internal holes with different diameters, and setting stepped portions to connect the machining segments with different diameters into one body, this composite fine boring tool integrates and optimizes the original complex machining content and summarizes the machining content on one tool. When boring multiple holes with high concentricity requirements, they are machined in one process by the composite fine boring tool, reducing the precision errors brought by multiple boring, dial indicator measuring, clamping and other operations, ensuring the machining precision well, reducing the machining time, greatly improving the machining efficiency of stepped holes with different diameters, reducing the labor intensity, and saving the production cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a schematic structural view of the multi-stage asymmetric composite fine boring tool of the present utility model;
[0016] Figure 2 is a cross-sectional view of the multi-stage asymmetric composite fine boring tool of the present utility model;
[0017] Explanation of the marks in the figure: 1. Tool shank; 2. Tool body; 21. Stepped portion; 3. Fine boring unit; 31. Cutting head; 32. Adjusting screw. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] In order to better understand the purpose, structure and function of the present utility model, the following further describes in detail a multi-stage asymmetric composite fine boring tool of the present utility model with reference to the accompanying drawings.
[0019] As Figure 1-2 shown, a multi-stage asymmetric composite fine boring tool of the present utility model includes a tool shank 1, a tool body 2 and a plurality of fine boring units 3. The tool body 2 is fixedly installed on the tool shank 1, and the tool shank 1 is connected to the spindle of the numerical control machine tool and is controlled to rotate by the numerical control machine tool. The plurality of fine boring units 3 are fixedly installed on the tool body 2 and simultaneously machine the diesel engine body.
[0020] In this embodiment, there are three fine boring units 3.
[0021] The existing tool body 2 is mostly cylindrical. After designing multiple fine boring units 3, dynamic balance imbalance will be caused during rotation, and the tool body 2 is too heavy, exceeding the maximum load of the numerical control machine tool. For adaptation and improvement, the tool body 2 of the present utility model is adaptively improved. The tool body 2 is cut from a cylinder into a triangular structure. Taking a three-stage fine boring tool as an example, its main rake angle is θ = ctgL / D, where L and D are a fitting straight line, that is, the slope of the θ angle. The straight line equation is AX + BY + C = 0, where A, B, and C are respectively calculated from the outer diameters (X1, X2, X3) and depths (Y1, Y2, Y3) of the three fine boring units 3. The formula is A = Y3 - Y2, B = -(X3 - X2), and C = (X3 - X2)*Y1 - (Y3 - Y2)*X1. The cutting amount of the tool body 2 of the present utility model is fitted by an equation according to actual cutting, which greatly reduces the tool vibration band and makes the tool body stable and reliable during processing without tool chatter.
[0022] The tool body 2 is provided with one or more stepped portions 21, and multiple fine boring units 3 can be respectively installed on different stepped portions to realize the processing of different inner diameters. The stepped portion 21 is provided with tool head mounting holes 211 for the fine boring unit 3.
[0023] Each fine boring unit 3 includes a tool head 31 and an adjusting screw 32. The tool head 31 is fixedly installed in the tool head mounting hole 211 through the adjusting screw 32, and the adjusting screw 32 can adjust the installation depth of the tool head 31, thereby adjusting the machining diameter of the tool head 31.
[0024] Preferably, there are three stepped portions 21.
[0025] The present utility model satisfies the machining of inner holes with different diameters by setting machining sections with different diameters, and sets a transition section to connect the machining sections with different diameters into one body, greatly improving the machining efficiency of stepped holes with different diameters and saving production costs.
[0026] It can be understood that the present utility model is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present utility model, various changes or equivalent substitutions can be made to these features and embodiments. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.
Claims
1. A multi-segment asymmetric composite fine boring tool, comprising a tool shank (1) and a tool body (2), wherein the tool body (2) is fixedly installed on the tool shank (1), the tool shank (1) is connected to the spindle of a numerical control machine tool and is controlled to rotate by the numerical control machine tool, and is characterized in that, The tool body (2) is provided with one or more stepped portions (21), the stepped portions (21) are provided with tool head (31) mounting holes, and a plurality of fine boring units (3) are mounted on the tool head (31) mounting holes to machine a diesel engine block simultaneously.
2. The multi-stage asymmetric composite fine boring tool according to claim 1, wherein, The stepped portion (21) includes one or more.
3. The multi-stage asymmetric composite fine boring tool according to claim 1, wherein The number of the fine boring units (3) is three.
4. The multi-stage asymmetric composite fine boring tool according to claim 1, characterized in that, The tool body (2) has a triangular structure.
5. The multi-stage asymmetric composite fine boring tool according to claim 1, characterized in that, The principal rake angle of the tool body (2) is θ = ctgL / D, where L and D are a fitted straight line, and the straight line equation is AX + BY + C = 0, wherein A, B, and C are respectively calculated from the outer diameter and depth of a plurality of fine boring units (3).
6. The multi-stage asymmetric composite fine boring tool according to claim 1, wherein, A plurality of fine boring units (3) are respectively mounted on different stepped portions (21).
7. The multi-stage asymmetric composite fine boring tool according to claim 1, wherein, Each fine boring unit (3) includes a tool head (31) and an adjusting screw (32). The tool head (31) is fixedly mounted in the tool head (31) mounting hole through the adjusting screw (32), and the adjusting screw (32) is used to adjust the mounting depth of the tool head (31), so as to adjust the machining diameter of the tool head (31).
8. The multi-stage asymmetric composite fine boring tool according to claim 1, characterized in that, The number of the stepped portions (21) is three.