Indexable insert tip, throw away tip is ground location error compensation method
阅读说明：本技术 可转位刀片磨削定位误差补偿方法 (Indexable insert tip, throw away tip is ground location error compensation method ) 是由 李军 姚斌 贺文辉 郑清 陈彬强 于 2019-07-30 设计创作，主要内容包括：可转位刀片磨削定位误差补偿方法,属于刀具磨削领域。首先建立工件坐标系、塔架坐标系和机床坐标系,将后角为β的标准正方形刀片装夹在两顶尖之间,采用接触式测量获取正方形刀片直线刃在机床坐标系中,C轴分别转向-β、β时,X方向的坐标值,根据测量值计算固定顶尖端面回转中心与塔架旋转中心X、Y方向上的偏差值；根据偏差值计算工件坐标系到塔架坐标系及机床坐标系的转换关系；最后计算后角刀片和倒棱刀片的定位误差补偿公式；将误差补偿到刀片磨削理论计算公式中。本发明采用误差自动补偿,大大降低机床装配精度的要求,在保证刀片加工精度的前提下,提高更换刀片的效率,极大地节约工时,节省成本,同时降低工人的工作强度。(Indexable insert tip, throw away tip is ground location error compensation method, belongs to tool grinding field.Initially set up workpiece coordinate system, pylon coordinate system and lathe coordinate system, by relief angle be β standard square blade clamping two it is top between, square blade straight line sword is obtained in lathe coordinate system using contact type measurement, C axis respectively steering-β, β when, the coordinate value of X-direction calculates the deviation on the stationary center end face centre of gyration and pylon rotation center X, Y-direction according to measured value；Workpiece coordinate system is calculated to pylon coordinate system and the transformational relation of lathe coordinate system according to deviation；Finally calculate the location error compensation formula of relief angle blade and chamfered edge blade；By error compensation into blade Grinding Theory calculation formula.The present invention uses error auto compensatng, substantially reduces the requirement of lathe assembly precision, under the premise of guaranteeing blade machining accuracy, improves the efficiency of more allowing blade replacement, greatly saving working hour, saves cost, while reducing the working strength of worker.)
1. indexable insert tip, throw away tip is ground location error compensation method, it is characterised in that the following steps are included:
1) it establishes using the stationary center end face centre of gyration for positioning blade as the workpiece coordinate system { x of origing, yg, zg, with Pylon rotary shaft C axis and pedestal intersection point are the pylon coordinate system { x of originj, yj, zj, with grinding wheel rotary shaft A axis and abrasive wheel end face The intersection point of place plane is the lathe coordinate system { x, y, z } of origin, and makes workpiece coordinate system, pylon coordinate system and lathe coordinate system X-axis, Y-axis, the direction of Z axis it is identical；
2) the standard square blade that relief angle is β is positioned respectively with large end face, small end face, and is clamped in stationary center and floats Between top, C axis is rotated to-β, β angle, and keep straight line sword flank to be processed parallel with abrasive wheel end face, measure blade straight line The coordinate value X of sword flank X-direction in lathe coordinate system1、X2, the revolution of stationary center end face is calculated according to the coordinate value of measurement Center and the deviation of pylon rotation center in the x, y direction；
3) deviation obtained according to step 2) calculates workpiece coordinate system, pylon coordinate system, the bias between lathe coordinate system and turns Change relationship；
4) workpiece coordinate system that is obtained according to step 3), pylon coordinate system, the eccentric transformational relation between lathe coordinate system, calculate Any relief angle isStraight line sword, chamfered edge side sword, calculate the error compensation formula in the case where assembling eccentric situation, and error is mended It repays in blade Grinding Theory calculation formula, feedback arrives NC code.
2. indexable insert tip, throw away tip as described in claim 1 is ground location error compensation method, it is characterised in that: set m as X-direction Deviation, n is the deviation of Y-direction, and the calculation formula of step 2) large deviations value is as follows:
Large end face positioning: mcos β+nsin β=X1；
Small end face positioning: mcos β-nsin β=X2；
Stationary center end face center can be calculated by above formula and the deviation of pylon rotation center in the x, y direction is as follows:
X-direction: m=(X1+X2)/(2·cosβ)；
Y-direction: n=(X1-X2)/(2·sinβ)。
3. indexable insert tip, throw away tip as claimed in claim 2 is ground location error compensation method, it is characterised in that: in step 3), work There are the mobile relationship in tri- directions X, Y, Z between part coordinate system and pylon coordinate system, workpiece coordinate system and pylon coordinate system it Between eccentric transformational relation it is as follows:
Wherein, M eccentric transition matrix between workpiece coordinate system and pylon coordinate system, m are the deviation of X-direction, and n is Y-direction Deviation, c be workpiece coordinate system origin with pylon coordinate origin at a distance from Z-direction, xg、yg、zgIt is space certain point in workpiece Coordinate in coordinate system, xj、yj、zjFor coordinate of the space certain point in pylon coordinate system.
4. indexable insert tip, throw away tip as claimed in claim 3 is ground location error compensation method, it is characterised in that: in step 3), tower Exist between rack coordinate system and lathe coordinate system in X, the rotation of the movement of Y-direction and pylon coordinate system about the z axis；Pylon coordinate Eccentric transformational relation is as follows between system and lathe coordinate system:
Wherein,Angle is rotated for any C axis, L, H are respectively lathe coordinate system origin and pylon coordinate origin in X, Y-direction Distance, i.e. for Two coordinate system in X, the movement of Y-direction, x, y, z is coordinate of the space certain point in lathe coordinate system.
5. indexable insert tip, throw away tip as claimed in claim 4 is ground location error compensation method, it is characterised in that: workpiece coordinate system with Bias between lathe coordinate system is converted to shown in matrix K:
Then have:
6. indexable insert tip, throw away tip as described in claim 1 is ground location error compensation method, it is characterised in that: right in step 4) It is in relief angleBlade, error compensation formula is as follows:
Large end face positioning:
Small end face positioning:
It is for chamfered edge angleBlade, error compensation formula is as follows:
Left chamfered edge:
Right chamfered edge:
Wherein, m, n are respectively the deviation of workpiece coordinate system origin in the x, y direction in pylon coordinate system, mhouduFor blade thickness Degree.
Technical field
The present invention relates to tool grinding fields more particularly to indexable insert tip, throw away tip to be ground location error compensation method.
Background technique
Indexable insert tip, throw away tip it is many kinds of, using periphery edge grinding machine grinding should be convenient for a variety of blades replacement.Periphery sharpening In bed, the pylon of fixturing blade consists of two parts: 1. stationary centers and floating centre part, is used for clamping blade.Fixed top The tip surface centre of gyration is blade positioning end face center and the workpiece coordinate system center that theoretical coordinate calculates；2. pylon is around pedestal Rotating part, for the grinding with relief angle blade.Institute is known as C axis around rotary shaft, and the intersection point of C axis and pedestal is in pylon rotation The heart.The center of stationary center end face ought to be overlapped in X, Y both direction with pylon rotation center.Due to actual assembling process In, the position at two centers is not easy to measure, and cause the center of stationary center end face to deviate rotation center in the x, y direction, thus Cause to replace before different relief angle blades are ground, needs a large amount of working hours to adjust top length, the adjustment period is long, and different relief angles The corresponding top length of blade is different, improves lathe cost, reduces the replacement efficiency of different relief angle blades.Particularly with one There is the nonstandard blade of multiple relief angles a bit, the problem of this kind of blade is normally ground not can solve using the length for adjusting top.
Summary of the invention
It is an object of the invention to solve the above problem in the prior art, indexable insert tip, throw away tip grinding position error is provided and is mended Compensation method adjusts top length without a large amount of working hours, saves the time, while improving top versatility, reduce cost, especially Solve the problems, such as that the nonstandard blade of multiple relief angles can not be normally ground.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
Indexable insert tip, throw away tip is ground location error compensation method, comprising the following steps:
1) it establishes using the stationary center end face centre of gyration for positioning blade as the workpiece coordinate system { x of origing, yg, zg, using pylon rotary shaft C axis and pedestal intersection point as the pylon coordinate system { x of originj, yj, zj, with grinding wheel rotary shaft A axis and sand The intersection point of plane where taking turns end face is the lathe coordinate system { x, y, z } of origin, and makes workpiece coordinate system, pylon coordinate system and lathe The X-axis of coordinate system, Y-axis, the direction of Z axis are identical；
2) by relief angle be β standard square blade respectively with large end face, small end face position, and be clamped in stationary center with Between floating centre, C axis is rotated to-β, β angle, and keep straight line sword flank to be processed parallel with abrasive wheel end face, measure blade The coordinate value X of straight line sword flank X-direction in lathe coordinate system1、X2, stationary center end face is calculated according to the coordinate value of measurement The centre of gyration and the deviation of pylon rotation center in the x, y direction；
3) deviation obtained according to step 2) calculates workpiece coordinate system, pylon coordinate system, inclined between lathe coordinate system Heart transformational relation, the movement in tri- directions X, Y, Z is tied up to including workpiece coordinate system and rotational coordinates, and pylon coordinate system and lathe are sat Mark ties up to X, the rotation of the movement of Y-direction and pylon coordinate system about the z axis；
4) workpiece coordinate system that is obtained according to step 3), pylon coordinate system, the eccentric transformational relation between lathe coordinate system, Calculating any relief angle isStraight line sword, chamfered edge side sword, calculate the error compensation formula in the case where assembling eccentric situation, and will be accidentally Into blade Grinding Theory calculation formula, feedback arrives NC code for difference compensation.
Compared with the existing technology, the beneficial effect that technical solution of the present invention obtains is:
The present invention initially sets up workpiece coordinate system, pylon coordinate system and lathe coordinate system, the standard square for being β by relief angle Between blade clamping is top two, square blade straight line sword is obtained in lathe coordinate system using contact type measurement, C axis difference When steering-β, β, the coordinate value of X-direction calculates the stationary center end face centre of gyration and pylon rotation center X, Y according to measured value Deviation on direction；Workpiece coordinate system is calculated to pylon coordinate system and the transformational relation of lathe coordinate system according to deviation；Most The location error compensation formula of relief angle blade and chamfered edge blade is calculated afterwards；By error compensation to blade Grinding Theory calculation formula In.The present invention uses error auto compensatng, substantially reduces the requirement of lathe assembly precision, in the premise for guaranteeing blade machining accuracy Under, the efficiency of more allowing blade replacement is improved, greatly saving working hour, saves cost, while reducing the working strength of worker.
Detailed description of the invention
Fig. 1 is the spatial position schematic diagram of workpiece coordinate system, pylon coordinate system, lathe coordinate system；
Fig. 2 is the stationary center end face centre of gyration and pylon rotation center for blade positioning in X, the bias of Y-direction Schematic diagram；
Fig. 3 is the standard square blade that relief angle is β, the schematic diagram positioned respectively with large end face, small end face；
When Fig. 4 is the standard square blade large end face positioning that relief angle is β, rotation C axis to-β measures straight line sword flank Coordinate value schematic diagram in lathe coordinate system；
When Fig. 5 is the standard square blade small end face positioning that relief angle is β, rotation C axis to β measures straight line sword flank Coordinate value schematic diagram in lathe coordinate system；
Fig. 6 is to have the nonstandard blade of positive and negative two relief angles in C axle steerWhen angle, adjusts top length and make the relief angle to beStraight line sword can normally be ground schematic diagram；
Fig. 7 is to have the nonstandard blade of positive and negative two relief angles in C axle steerWhen angle, the top length adjusted in Fig. 6 without Method meets relief angleStraight line sword normal grinding schematic diagram.
Specific embodiment
In order to be clearer and more clear technical problems, technical solutions and advantages to be solved, tie below Drawings and examples are closed, the present invention is described in further details.
As shown in Fig. 1~7, indexable insert tip, throw away tip is ground location error compensation method, comprising the following steps:
1) it establishes using the stationary center end face centre of gyration for positioning blade as the workpiece coordinate system { x of origing, yg, zg, using pylon rotary shaft C axis and pedestal intersection point as the pylon coordinate system { x of originj, yj, zj, with grinding wheel rotary shaft A axis and sand The intersection point of plane where taking turns end face is the lathe coordinate system { x, y, z } of origin, and makes workpiece coordinate system, pylon coordinate system and lathe The X-axis of coordinate system, Y-axis, the direction of Z axis are identical；
2) by relief angle be β standard square blade respectively with large end face, small end face position, and be clamped in stationary center with Between floating centre, uses precision to measure four straight line swords of blade for 1.7 μm of gas push type gauge head and returned to stationary center end face Turn the distance at center, adjust V-block, so that the geometric center of blade and the stationary center end face centre of gyration are in X, Z both direction Deviation within 3 μm, respectively in the case where large end face and small end face position, rotate C axis to-β, β angle, and make to be added Work straight line sword flank is parallel with abrasive wheel end face, measures the coordinate value of blade straight line sword flank X-direction in lathe coordinate system X1、X2, the deviation of the stationary center end face centre of gyration and pylon rotation center in the x, y direction is calculated according to the coordinate value of measurement Value；
3) deviation obtained according to step 2) calculates workpiece coordinate system, pylon coordinate system, inclined between lathe coordinate system Heart transformational relation；There are the mobile relationships in tri- directions X, Y, Z between workpiece coordinate system and pylon coordinate system；Pylon coordinate system with There is the mobile relationship with rotation between lathe coordinate system, mobile is the movement of X, Y-direction, rotates to be pylon coordinate system about the z axis Rotation；
4) workpiece coordinate system that is obtained according to step 3), pylon coordinate system, the eccentric transformational relation between lathe coordinate system, Calculating any relief angle isStraight line sword, chamfered edge side sword, calculate the error compensation formula in the case where assembling eccentric situation, and will be accidentally Into blade Grinding Theory calculation formula, feedback arrives NC code for difference compensation.
The calculation formula of step 2) large deviations value is as follows: m is set as the deviation of X-direction, n is the deviation of Y-direction,
Large end face positioning: mcos β+nsin β=X1；
Small end face positioning: mcos β-nsin β=X2；
Stationary center end face center and the deviation of pylon rotation center in the x, y direction then can be calculated such as by above formula Under:
X-direction: m=(X1+X2)/(2·cosβ)；
Y-direction: n=(X1-X2)/(2·sinβ)。
In step 3), there are the mobile relationship in tri- directions X, Y, Z between workpiece coordinate system and pylon coordinate system, workpiece is sat Eccentric transformational relation is as follows between mark system and pylon coordinate system:
Wherein, M eccentric transition matrix between workpiece coordinate system and pylon coordinate system, m are the deviation of X-direction, and n is the side Y To deviation, c be workpiece coordinate system origin with pylon coordinate origin at a distance from Z-direction, xg、yg、zgExist for space certain point Coordinate in workpiece coordinate system, xj、yj、zjFor coordinate of the space certain point in pylon coordinate system.
In step 3), exist between pylon coordinate system and lathe coordinate system in X, the movement of Y-direction and pylon coordinate system Rotation about the z axis；Eccentric transformational relation is as follows between pylon coordinate system and lathe coordinate system:
Wherein,Angle is rotated for any C axis, L, H are respectively lathe coordinate system origin and pylon coordinate origin in X, Y In X, the movement of Y-direction, x, y, z is coordinate of the space certain point in lathe coordinate system for the distance in direction, i.e. Two coordinate system.
Bias between workpiece coordinate system and lathe coordinate system is converted to shown in matrix K:
Then have:
In step 4), it is for relief angleBlade, error compensation formula is as follows:
Large end face positioning:
Small end face positioning:
It is for chamfered edge angleBlade, error compensation formula is as follows:
Left chamfered edge:
Right chamfered edge:
Wherein, m, n are respectively the deviation of workpiece coordinate system origin in the x, y direction in pylon coordinate system, mhouduFor knife Piece thickness.
The present invention can be achieved to deviate pylon rotation for the stationary center end face centre of gyration of positioning blade in the edge grinding machine of periphery Under the situation for turning center, can the nonstandard blade of convenient changing and standard insert, without adjusting top length repeatedly.
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