辅助对中装置

Abstract

本实用新型属于轴类工件加工技术领域，公开了一种辅助对中装置，包括竖直设置的安装板、中心固定销、百分表、零位挡销和对中架，中心固定销安装于安装板并连接机床刀柄；百分表安装于安装板；零位挡销设于安装板，对中架转动连接于安装板包括对中部和两个呈钝角连接的限位部，对中部连接于两个限位部的连接处，对中部侧面连接于百分表的测头，对中架处于初始状态时，对中部抵靠于零位挡销并与中心固定销共轴，百分表的指针位于零刻度，对中架处于工作状态时，两个限位部相向的一侧均压靠于工件的外圆周面，使得对中架转动并带动百分表指针偏转。本实用新型能够辅助机床刀柄垂直对中于工件的中轴线，精度高且操作简单。

Claims

1. An auxiliary centering device for assisting the vertical centering of a tool shank of a machine tool to the central axis of a shaft-like workpiece (100) which is fixed to a machining table, characterized in that, The auxiliary centering device includes: A vertically mounted mounting plate (1); A central fixing pin (2) is installed on the mounting plate (1) and extends vertically upward to connect to the machine tool holder; A dial indicator (3) is mounted on the mounting plate (1); The zero-position stop pin (4) is vertically set on the mounting plate (1) and located between the center fixing pin (2) and the dial indicator (3); A centering frame (5) is rotatably connected to the mounting plate (1). The centering frame (5) includes a centering part (51) and two limiting parts (52) connected at an obtuse angle. The centering part (51) is connected to the connection point of the two limiting parts (52) and extends in a direction away from the bisector of the angle between the two limiting parts (52). The side of the centering part (51) is connected to the probe (31) of the dial indicator (3). The centering frame (5) has an initial state and a working state. In the initial state, the centering frame (5) abuts against the zero-position stop pin (4) and is coaxial with the center fixing pin (2), and the pointer of the dial indicator (3) is at zero. In the working state, the two limiting parts (52) press against the outer circumferential surface of the workpiece (100) on opposite sides, causing the centering frame (5) to rotate and drive the pointer of the dial indicator (3) to deflect.

2. The supplemental centering device of claim 1, wherein, The auxiliary centering device also includes a fixing component (6), which is connected to the mounting plate (1) and has a fixing hole. The dial indicator (3) includes a dial (32) and a connector (33) connected to each other. The dial (32) is fixedly installed on the mounting plate (1), and the connector (33) passes through the fixing hole. The probe (31) extends from the end of the connector (33) and is connected to the centering part (51).

3. The supplemental centering device of claim 2, wherein, The fixing component (6) includes a fixing clamp (61) and a fastening bolt (62). The fixing clamp (61) includes two clamps arranged opposite each other in the vertical direction. Each of the two clamps has a groove on one side opposite to the other. The two grooves are arranged opposite each other to form the fixing hole. The fastening bolt (62) passes through one of the clamps in the vertical direction and is screwed to the other clamp to lock the connector (33).

4. The supplemental centering device of claim 1, wherein, The mounting plate (1) includes a first mounting part (11) and a second mounting part (12). The first mounting part (11) is vertically arranged, and the second mounting part (12) is located on the top surface of the first mounting part (11) and is vertically connected to the second mounting part (12). The central fixing pin (2) is vertically inserted through the second mounting part (12).

5. The supplemental centering device of claim 4, wherein, The central fixing pin (2) is provided with external threads, and the second mounting part (12) is provided with a threaded hole adapted to the external threads in the vertical direction.

6. The supplemental centering device of claim 1, wherein, A rotating shaft (53) is provided at the connection between the centering part (51) and the limiting part (52). A bearing is correspondingly provided on the mounting plate (1). The rotating shaft (53) is rotatably installed in the bearing, so that the centering frame (5) rotates around the rotating shaft (53) to switch between the initial state and the working state.

7. The centralization assist of any of claims 1-6, wherein, The included angle between the two limiting parts (52) is 120°-150°.

8. The centralization assist of any of claims 1-6, wherein, Anti-slip textures are provided on the opposite sides of the two limiting parts (52).

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