刀杆、刀具及测力系统

Abstract

本实用新型属于刀具技术领域，公开了一种刀杆、刀具及测力系统，将两个感知部沿预设方向分布且相互独立检测，在刀具进行切削的过程中，刀杆发生变形，两个感知部所在位置的变形量不同，通过两个感知部测量这两个位置压力变化，便于根据两个感知部的测量信号计算切削力，如主切削力、进给力等。将电阻应变传感器固定于安装槽内，无需额外占用机床空间能够将刀杆直接安装到机床上，通用性高；将两个感知部均压接于安装槽的槽内壁，实现电阻应变传感器与安装槽的槽内壁直接接触，相比于现有技术中的非接触测量，测量精度更高。

Claims

1. A knife bar, characterized in that include: The tool holder body (1) has a mounting groove (12) on its side wall, and the depth of the mounting groove (12) is perpendicular to the length direction of the tool holder body (1). A resistance strain sensor (2) is fixed in the mounting groove (12). The resistance strain sensor (2) has two sensing parts (21) distributed along a preset direction and detecting each other independently. Both sensing parts (21) are pressed against the inner wall of the mounting groove (12). The preset direction is the length direction of the tool holder body (1) or the groove depth direction of the mounting groove (12).

2. The knife bar of claim 1, wherein, The inner wall of the mounting groove (12) is provided with a first threaded hole (13), and the tool bar also includes a first fastener, which passes through the resistance strain sensor (2) and is threaded to the first threaded hole (13).

3. The knife bar of claim 2, wherein, The tool holder also includes a cover plate (3), which is fixed to the tool holder body (1) and blocks the opening of the mounting groove (12).

4. The knife bar of claim 3, wherein, Along the groove depth direction of the mounting groove (12), the cover plate (3) is spaced apart from the resistance strain sensor (2) and the first fastener; And / or, the flatness of the bottom wall of the mounting groove (12) is less than or equal to 0.05 mm.

5. The knife bar of claim 3 wherein, The cover plate (3) is fastened to the main body of the cutter bar (1).

6. The knife bar of any of claims 1 to 5, wherein, One end of the tool holder body (1) along the length direction forms a clamping part, which is used for mounting on a machine tool; the clamping part has a central axis extending along the length direction of the tool holder body (1), and along the groove depth direction of the mounting groove (12), the bottom wall of the mounting groove (12) and the groove opening of the mounting groove (12) are located on both sides of the central axis.

7. The knife bar of any of claims 1-5, wherein, The preset direction is the length direction of the tool bar body (1), the resistance strain sensor (2) is fixed to the bottom wall of the mounting groove (12), or the resistance strain sensor (2) is fixed to the inner wall of the mounting groove (12) which is parallel to the length direction of the tool bar body (1) and connected to the bottom wall of the mounting groove (12); Alternatively, the preset direction is the groove depth direction of the mounting groove (12), and the resistance strain sensor (2) is fixed to the inner wall of the mounting groove (12) which is perpendicular to the length direction of the tool bar body (1).

8. The knife bar of any of claims 1-5, wherein, One end of the tool holder body (1) in the length direction forms a clamping part, which is used to be installed on a machine tool; The preset direction is the length direction of the tool bar body (1). The tool bar body (1) is provided with a wire routing groove (14) and a wire routing hole (15). Along the length direction of the tool bar body (1), the wire routing groove (14) is located between the wire routing hole (15) and the mounting groove (12). One end of the wire routing hole (15) extends to the inner wall of the groove of the wire routing groove (14) near the clamping part, and the other end extends to the end face of the clamping part away from the resistance strain sensor (2). The resistance strain sensor (2) is connected to a signal line (4). One end of the signal line (4) is placed in the wiring groove (14) and electrically connected to the resistance strain sensor (2). The other end of the signal line (4) passes through the wiring hole (15) and exits the tool holder body (1).

9. A tool characterized by It includes a cutting insert (6) and a tool holder as described in any one of claims 1 to 8, wherein the cutting insert (6) is mounted at one end of the tool holder in the longitudinal direction.

10. Force measurement system, characterized in that Includes a data acquisition device (5), a data processing device (7), and a cutting tool as described in claim 9. The signal line (4) connected to the resistance strain sensor (2) is communicatively connected to the data acquisition device (5). The data acquisition device (5) is used to acquire the measurement signals of the two sensing parts (21) of the resistance strain sensor (2). The data acquisition device (5) is communicatively connected to the data processing device (7).

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