刀杆及切削刀具

Abstract

本实用新型属于刀具技术领域，公开了刀杆及切削刀具，将第二预紧件的轴向与Y向呈夹角设置，通过旋拧第一预紧件和第二预紧件使得传感器所测的沿X向、Y向的作用力均为零，实现沿X向和Y向将传感器夹紧于多个第二预紧件之间，通过第一预紧件将传感器抵压于第一安装槽的槽底壁，实现从X向、Y向和Z向三个方向对传感器进行预紧，消除切削刀具的各个部件之间的微米级间隙对力传导的影响，从而解决压力电信号传导对切削刀具各个部件的微米级间隙产生的测量异常的问题。还能够通过对第一预紧件和每个第二预紧件施加于传感器的作用力进行调控，使得安装完毕后，切削刀具工作时传感器工作在线性区，提高不同切削刀具的装配一致性。

Claims

1. A knife bar, characterized in that include: The tool holder body (1) has a first mounting groove (11) on one side; Sensor (2), the sensor (2) is located in the first mounting slot (11); The first pre-tightening member (3) is threadedly connected to the tool bar body (1) to press the sensor (2) against the bottom wall of the first mounting groove (11) along the Z direction; Multiple second preload members (4) are threaded to the tool holder body (1). The multiple second preload members (4) are arranged circumferentially around the first preload member (3). The axial direction of the second preload member (4) is perpendicular to the axial direction of the first preload member (3). The axial direction of the second preload member (4) is set at an angle to the Y direction. At least two second preload members (4) can apply a force along the Y direction to the sensor (2), and at least one second preload member (4) can apply a force along the X direction to the sensor (2), so that the resultant force of the force applied to the sensor (2) along the X direction and the resultant force of the force applied to the sensor (2) along the Y direction are both zero. The X direction is parallel to the feed direction of the cutting tool, the Y direction is parallel to the cutting tool's depth of cut direction, and the Z direction is parallel to the direction in which the cutting tool tip is tangent to the workpiece when it enters the workpiece.

2. The knife bar of claim 1, wherein, The plurality of second pretensioners (4) include: X-direction preload (41), the axial direction of the X-direction preload (41) is the X direction, the axis of the X-direction preload (41) and the axis of the first preload (3) intersect to form an XZ plane (100), and the axis of the tool holder body (1) and the axis of the first preload (3) intersect to form a YZ plane (200). Two Y-direction pretensioners (42) are located on one side of the YZ plane (200), and the X-direction pretensioner (41) is located on the other side of the YZ plane (200). The two Y-direction pretensioners (42) are located on both sides of the XZ plane (100).

3. The tool holder according to claim 2, characterized in that, The two Y-direction preload members (42) are symmetrically arranged about the XZ plane (100).

4. The knife bar of claim 2, wherein, The angle between the axis of the Y-direction preload member (42) and the XZ plane (100) is α, where 30°≤α≤60°.

5. The knife bar of claim 1, wherein, The plane perpendicular to the Y direction and containing the axis of the first pretensioner (3) is the XZ plane (100), and the plane perpendicular to the X direction and containing the axis of the first pretensioner (3) is the YZ plane (200). There are four second pretensioners (4), with two second pretensioners (4) arranged on each side of the XZ plane (100) and two second pretensioners (4) arranged on each side of the YZ plane (200).

6. The tool holder according to claim 5, characterized in that, The second preload members (4) located on both sides of the XZ plane (100) are symmetrically arranged about the XZ plane (100); And / or, the second pretensioner (4) located on both sides of the YZ plane (200) is symmetrically arranged about the YZ plane (200).

7. The knife bar of any of claims 1 to 6, wherein, The tool holder also includes a locking pad (5), and the bottom wall of the first mounting groove (11) is provided with a threaded hole (113). The first pre-tightening member (3) passes through the locking pad (5) and the sensor (2) and is threadedly connected to the threaded hole (113). The first pre-tightening member (3) presses the locking pad (5) against the sensor (2) along the Z direction.

8. The knife bar of claim 7, wherein, The second pre-tightening member (4) can press against the outer peripheral wall of the locking pad (5) along its own axial direction.

9. The knife bar of any of claims 1-6, wherein, The tool holder body (1) has two first mounting surfaces (13) arranged opposite to each other along the Z direction, and the first mounting groove (11) is formed on either of the first mounting surfaces (13).

10. A cutting tool characterized in that, Includes the tool holder as described in any one of claims 1 to 9.

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