CN102620698A

CN102620698A - Clamping error determination method of indexable insert based on N-point measurement

Info

Publication number: CN102620698A
Application number: CN2012100765983A
Authority: CN
Inventors: 田新诚
Original assignee: Shandong University
Current assignee: Shandong Deyi Robot Co ltd
Priority date: 2012-03-21
Filing date: 2012-03-21
Publication date: 2012-08-01
Anticipated expiration: 2032-03-21
Also published as: CN102620698B

Abstract

The invention relates to a clamping error determination method of an indexable insert based on N-point measurement. The adjustment process is simple and flexible, and clamping errors in up-and-down direction and front-and-back direction can be effectively determined. The steps are as follows: (1) placing the processed insert in a loading device and clamping through a clamping head; (2) enabling the surface a of the insert to be upward and positioned in a horizontal state; (3) measuring the distance d1 from a sensor to the surface a; (4) rotating the insert for 90 degrees till the surface d is upward and positioned in a horizontal state; (5) measuring the distance d2 from the sensor to the surface d by using a measurement sensor of a machine tool; (6) operating a numerical control system, and rotating the insert for 90 degrees till the surface c is upward and positioned in a horizontal state; (7) measuring the distance d3 from the sensor to the surface c; (8) operating the numerical control system, and rotating the insert for 90 degrees till the surface b is upward and positioned in a horizontal state; (9) measuring the distance d4 from the sensor to the surface b by using the measurement sensor of the machine tool; and (10) figuring out the clamping errors x and y of the insert in the horizontal direction and the vertical direction.

Description

Indexable insert tip, throw away tip clamping error determine method based on the measurement of N point method

Technical field

The present invention relates to a kind of indexable insert tip, throw away tip clamping error determine method of measuring based on N point method.

Background technology

In indexable insert tip, throw away tip numerical control peripheral grinding process; The numerical control grinding program of blade is to work out by desirable blade clamping center; And in actual process, have error between the actual clamping center of blade and the desirable clamping center, when the clamping error surpasses the grinding allowance of blade; The blade periphery can not complete grinding, thereby causes blade to be scrapped.

In order to reduce the clamping error, the measure of taking usually is the positional precision of adjustment insert cartridges with respect to the blade loader, but adjustment process needs higher skill, the leading time of labor.

Summary of the invention

The object of the invention provides a kind of indexable insert tip, throw away tip clamping error determine method of measuring based on N point method exactly for addressing the above problem.N is the limit number of polygon blade here, also is the measurement number of times in the blade clamping error determine process.This clamping error determine process simple and flexible, can effectively measure blade about clamping error on (Y direction) and front and back (directions X) direction.

For realizing above-mentioned purpose, the present invention adopts following technical scheme:

A kind of indexable insert tip, throw away tip clamping error determine method of measuring based on N point method, concrete steps are:

The first step: processed blade is put into loader and used the chuck clamping;

Second step: the operating numerical control system, make blade rotate to state 1, promptly a of blade faces up and is in horizontality;

The 3rd step: with survey sensor survey sensor to a face of lathe apart from d1;

The 4th step: the operating numerical control system, make blade half-twist to state 2, promptly the d of blade faces up and is in horizontality;

The 5th step: with survey sensor survey sensor to the d face of lathe apart from d2;

The 6th step: the operating numerical control system, make blade half-twist to state 3, promptly the c of blade faces up and is in horizontality;

The 7th step: with survey sensor survey sensor to the c face of lathe apart from d3.

The 8th step: the operating numerical control system, make blade half-twist to state 4, promptly the b of blade faces up and is in horizontality.

The 9th step: with survey sensor survey sensor to the b face of lathe apart from d4;

The tenth step: calculate blade clamping error x in the horizontal and vertical directions, y;

Wherein, the computing method of deviation y

If the length of side of square blade is L, actual clamping center O 1 is y with theoretical clamping center O side-play amount in vertical direction, has relation as follows:

d 1 + y + \frac{L}{2} = d 3 - y + \frac{L}{2}

y = \frac{d 3 - d 1}{2}

Y＞0 o'clock, actual clamping center O 1 is squinted to the c limit by the O point; Y＜0 o'clock; Actual clamping center O 1 is squinted to a limit by the O point, offset distance

The computing method of deviation x

d 2 + x + \frac{L}{2} = d 4 - x + \frac{L}{2}

x = \frac{d 4 - d 2}{2}

X＞0 o'clock; Actual clamping center O 1 is squinted to the d limit by the O point; X＜0 o'clock; To the skew of b limit, offset distance is

to actual clamping center O 1 by the O point

In said second step, O1 is actual clamping center, and O is theoretical clamping center, and the purpose of clamping error determine is to obtain actual clamping center O 1 and theoretical clamping center O clamping deviation x and deviation y in vertical direction in the horizontal direction.

Ultimate principle of the present invention is: at blade after clamping finishes on peripheral grinding machine; By the relevant coordinate axis motion of digital control system instruction; Make blade do before and after rectilinear motion and/or rotatablely move; Obtain the measurement data of blade diverse location during this time with survey sensor, the measurement data that obtains handled by corresponding algorithm, thus obtain blade about clamping error on (Y direction) and front and back (directions X) direction.

The invention has the beneficial effects as follows: measure the clamping error in the blade first being processed through measuring method, can (1) quantitative basis be provided for the adjustment of chuck; (2) avoid because of the blade that the clamping error causes is too greatly scrapped, the emery wheel collision; (1) foundation is provided for the automatic compensation of clamping error.

Description of drawings

Fig. 1 is the view of blade state 1;

Fig. 2 is the view of blade state 2;

Fig. 3 is the view of blade state 3;

Fig. 4 is the view of blade state 4;

Fig. 5 is a process flow diagram of the present invention.

Embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is further specified.

Among Fig. 5, be that example provides clamping error determine method and step with the square blade:

The first step: processed blade is put into loader and used the chuck clamping.

Second step: the operating numerical control system makes blade rotate to state 1 (a of blade faces up and is in horizontality), like Fig. 1.(O1 is actual clamping center among the figure, and O is theoretical clamping center, and the purpose of clamping error determine is to obtain actual clamping center O 1 and theoretical clamping center O clamping deviation x and deviation y in vertical direction in the horizontal direction)

The 3rd step: with survey sensor survey sensor to a face of lathe apart from d1.

The 4th step: the operating numerical control system makes blade half-twist to state 2 (d of blade faces up and is in horizontality), like Fig. 2.

The 5th step: with survey sensor survey sensor to the d face of lathe apart from d2.

The 6th step: the operating numerical control system makes blade half-twist to state 3 (c of blade faces up and is in horizontality), like Fig. 3.

The 8th step: the operating numerical control system makes blade half-twist to state 4 (b of blade faces up and is in horizontality), like Fig. 4.

The 9th step: with survey sensor survey sensor to the b face of lathe apart from d4.

The tenth step: calculate blade clamping error x in the horizontal and vertical directions, y.

1. the computing method of deviation y

d 1 + y + \frac{L}{2} = d 3 - y + \frac{L}{2}

y = \frac{d 3 - d 1}{2}

Y＞0 o'clock, actual clamping center O 1 is squinted to the c limit by the O point; Y＜0 o'clock; To the skew of a limit, offset distance is

to actual clamping center O 1 by the O point

2. the computing method of deviation x

d 2 + x + \frac{L}{2} = d 4 - x + \frac{L}{2}

x = \frac{d 4 - d 2}{2}

X＞0 o'clock; Actual clamping center O 1 is squinted to the d limit by the O point; X＜0 o'clock; To the skew of b limit, offset distance is to actual clamping center O 1 by the O point

Claims

1. indexable insert tip, throw away tip clamping error determine method of measuring based on N point method is characterized in that concrete steps are:

The first step: processed blade is put into loader and used the chuck clamping;

Wherein, the computing method of deviation y

d 1 + y + \frac{L}{2} = d 3 - y + \frac{L}{2}

y = \frac{d 3 - d 1}{2}

to actual clamping center O 1 by the O point

The computing method of deviation x

d 2 + x + \frac{L}{2} = d 4 - x + \frac{L}{2}

x = \frac{d 4 - d 2}{2}

to actual clamping center O 1 by the O point

2. the indexable insert tip, throw away tip clamping error determine method of measuring based on N point method as claimed in claim 1; It is characterized in that; In said second step; O1 is actual clamping center, and O is theoretical clamping center, and the purpose of clamping error determine is to obtain actual clamping center O 1 and theoretical clamping center O clamping deviation x and deviation y in vertical direction in the horizontal direction.