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Method and device for measuring crankshaft angular orientation in tangential point tracking grinding

A technology of angular positioning and tangent point tracking, which is applied to the parts of grinding machine tools, grinding/polishing equipment, metal processing equipment, etc., can solve the problems of low positioning accuracy and low efficiency, and achieve accuracy assurance and convenient measurement Head position, easy to adjust the effect

Active Publication Date: 2016-03-30
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, manual positioning is commonly used on crankshaft CNC grinding machines, that is, using measuring tools such as plugs and dial gauges to adjust the position based on experience. Not only is the efficiency low and the positioning accuracy is not high, the measuring tools used also have certain limitations.

Method used

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  • Method and device for measuring crankshaft angular orientation in tangential point tracking grinding
  • Method and device for measuring crankshaft angular orientation in tangential point tracking grinding
  • Method and device for measuring crankshaft angular orientation in tangential point tracking grinding

Examples

Experimental program
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Effect test

Embodiment 1

[0044] see Figure 1-Figure 5, the crankshaft angular positioning measurement method in the tangential point tracking grinding is characterized in that: making full use of the high-precision motion of the C-axis, X-axis and Z-axis of the crankshaft CNC grinding machine and the axis position data measured by the grating rulers equipped with each axis of the machine tool , by controlling the movement of the grinding wheel head, the probe is positioned in the effective measurement area, and then the head frame is used to rotate, so that the crankshaft connecting pin contacts the probe twice in clockwise and counterclockwise directions, and is read by the CNC system of the machine tool Take the C-axis angle coordinate value at the time of two contacts; after the measurement is completed, process and calculate the data of the two measurements to obtain the machine tool headstock in which the machine tool coordinate system used for processing coincides with the workpiece coordinate s...

Embodiment 2

[0053] This implementation case is basically the same as the implementation example one, and the special features are as follows: in the step 4), the center of the measuring head is in the coordinate system X C o C Y C Middle coordinate O D1 (x D1 ,y D1 ) calculation method:

[0054] Take the center of rotation of the crankshaft as the coordinate origin, the feeding direction of the grinding wheelhead is the Xc axis, and the vertical direction is the Yc axis, and establish the crankshaft angular positioning coordinate system X C o C Y C , the measuring device is installed on the grinding wheel frame. Before use, it is necessary to use the standard crankshaft workpiece to set the center of the probe at X C o C Y C position O in the coordinate system D1 (x D1 ,y D1 ) for calibration, where:

[0055] the y D1 It is only related to the installation position of the probe, and can be obtained through calibration: y D1 =C y , where Cy is the installation constant of t...

Embodiment 3

[0070] see figure 2 , image 3 , where (1) is the crankshaft main journal, (2) is the crankshaft pin to be processed, and (3) is the grinding wheel. The crankshaft angular positioning measurement device includes: the connecting rod (5) equipped with the trigger type measuring head system (4) is connected with the cylinder (11), and the cylinder (11) is fixed on the base (10) connected with the linear guide rail (7). ), the linear motion mechanism composed of the linear guide rail (7) and the servo motor (8) is fixed on the cantilever support (6), and the cantilever support (6) is fixed on the grinding wheel frame (9). During measurement, the base (10) moves to the measurement position along the linear guide rail (7) driven by the servo motor (8), and the connecting rod (5) equipped with the trigger probe system (4) is pushed by the cylinder (11) down, flip to the measurement position (such as image 3 shown). After the measurement, the base (10) returns to the processing ...

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Abstract

The invention relates to a crankshaft angular positioning measurement method and device in tangential point tracking grinding. The crankshaft angular positioning measurement device is arranged on a grinding wheel frame, the integral device moves along with the grinding wheel frame, a connecting rod is pushed through an air cylinder to lay down a measuring head to be in a measurement state so as to enable the measuring head to be located in an effective measurement area, a crankshaft connecting rod neck is driven by rotation of a head frame to be in contact with the measuring head for two times in the clockwise direction and the anticlockwise direction, the angular coordinate values of a head frame C shaft during two-time-contact are recorded through a numerically controlled system. After measurement, coordinate offset of the head frame C shaft of a machine tool can be obtained through processing and solution on data measured for two times and accordingly a machine tool coordinate system for machining and a workpiece coordinate system for programming can be coincided and angular positioning of a crankshaft is achieved. According to the crankshaft angular positioning measurement method and device in the tangential point tracking grinding, the work which is achieved through manual positioning can be achieved due to a measurement mechanism which is arranged on the grinding wheel frame and the self-movement of a crank shaft grinding machine, the structure is simple, the use is stable and reliable, and the positioning accuracy and efficiency is improved.

Description

technical field [0001] The invention relates to a method and device for measuring crankshaft angular orientation in tangential point tracking grinding. Background technique [0002] Using the tangent point tracking grinding method to process the crankshaft must be angularly positioned so that the machine tool coordinate system used in processing coincides or is close to the workpiece coordinate system used in programming, so that the grinding allowance can be evenly distributed and the phase angle of each gear of the crankshaft can be guaranteed. Precision. Once there is a deviation in the angular positioning of the crankshaft, the changing allowance on the circumference will affect the machining accuracy of the crankshaft connecting rod neck profile; when the angular positioning deviation is large, a negative grinding allowance may also occur, and the required grinding will not be possible The radial size of the connecting rod neck produces a large dimensional error. Base...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B49/00
CPCB24B49/08
Inventor 沈南燕李静叶骏汪学栋钱翔贾亚凯许海
Owner SHANGHAI UNIV