CN-117921446-B - Automatic machining method for chamfering bidirectional grinding of hole with reverser

CN117921446BCN 117921446 BCN117921446 BCN 117921446BCN-117921446-B

Abstract

The invention provides an automatic machining method for bidirectional grinding of a chamfer with a reverser hole, which comprises the steps of generating a midpoint coordinate of a waist-shaped groove, calculating a grinding angle, obtaining a chamfer inlet coordinate of the reverser hole, obtaining a reducing cutting-in end point distance, a translation amount distance and a reducing cutting-out end point distance of the chamfer inlet of the reverser hole, obtaining a chamfer outlet starting point coordinate of the reverser hole, obtaining a reducing cutting-in end point distance, a translation amount distance and a reducing cutting-out end point distance of the chamfer outlet of the reverser hole, detecting a machined workpiece, and adjusting a tool setting adjustment amount of the chamfer starting point of the reverser hole and/or a tool setting adjustment amount of a thread starting point based on detection results. And the tool setting data is related to the tool setting point and the thread starting point through the tool setting adjustment quantity of the thread starting point and the grinding starting point, and the tool setting adjustment quantity of the chamfer starting point of the reverser hole is related to the chamfer starting point of the reverser hole, so that the reverser hole and the grinding starting point are not related to each other after tool setting.

Inventors

ZHANG YUEJUN
ZHOU FENG
WANG YONGHUI

Assignees

浙江陀曼智能科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20231225

Claims (4)

1. An automatic machining method for chamfering and bidirectional grinding of a hole with a reverser, wherein the reverser hole is a waist-shaped groove, and the method is characterized by comprising the following steps: S1, linking a Z axis and a C axis of a machine tool; s2, acquiring a midpoint coordinate of the waist-shaped groove in the width direction; s3, generating midpoint coordinates of the waist-shaped groove in the length direction based on the midpoint coordinates of the width direction, wherein the step S3 comprises the following steps: s310 the measuring head is arranged in the middle of the width direction of the kidney-shaped groove the position moves along the length direction of the kidney-shaped groove; S320, measuring to obtain vertex coordinates of the top semicircle as Z4 and C4; s330, measuring to obtain vertex coordinates of the bottom semicircle as Z5 and C5; S340, calculating that the midpoint coordinate in the length direction of the waist-shaped groove is Z6=Z4+ (Z4-Z5)/2, and C6=C4+ (C4-C5)/2; S4, generating midpoint coordinates of the waist-shaped groove based on the midpoint coordinates in the width direction and the midpoint coordinates in the length direction; s5, combining the adjustment quantity of the thread starting point tool setting and the actual starting point grinding point coordinate by taking the midpoint coordinate of the waist-shaped groove as a reference to obtain a starting grinding angle; The step S5 includes: S510, adding a thread starting point tool setting adjustment quantity L1 by taking coordinates Z6 and C6 as references to the middle of the kidney-shaped groove by the measuring head, and comparing the thread starting point tool setting adjustment quantity L1 with an actual grinding starting point coordinate Z0; s520, calculating a starting point error z7=z6+l1-Z0; S530 grinding angle C0 =c6+z7 360/S, wherein S is the lead; s6, obtaining a first reverser hole chamfering inlet coordinate based on the reverser hole chamfering starting point tool setting adjustment quantity, the middle point coordinate of the waist-shaped groove and the actual starting point coordinate; The step S6 comprises the following steps: S610, the Z-axis coordinate of the chamfer inlet of the first reverser hole is an absolute coordinate obtained by adding the Z-axis coordinate of the midpoint in the length direction of the waist-shaped groove and the tool setting adjustment quantity of the chamfer starting point of the reverser hole; S620, C-axis coordinate C10= (Z10-Z0) of chamfer inlet of the first reverser hole 360/S, wherein Z0 is the actual grinding starting point coordinate, Z10 is the Z-axis coordinate of the chamfer inlet of the first reverser hole, and S is the lead; s7, obtaining a reducing cutting-in end point distance based on a chamfer inlet of the first reverser hole based on the cutting-in angle; s8, obtaining a translation distance based on a chamfer inlet of the first reverser hole based on the translation angle; S9, obtaining a reducing cutting end point distance based on a chamfer inlet of the first reverser hole based on the cutting angle; s10, obtaining a chamfer outlet starting point coordinate of the first reverser hole based on a chamfer inlet coordinate of the first reverser hole, a reducing cutting-in finishing point distance, a translation amount distance and a reducing cutting-out finishing point distance; The calculation formula of the reducing cutting-in end point distance based on the chamfer inlet of the first reverser hole is that Z11=cutting-in angle S/360, c11=cut angle; the translation amount distance calculation formula based on the chamfer inlet of the first reverser hole is that Z12=translation angle S/720, c12=translation angle/2; the calculation formula of the reducing cutting end point distance based on the chamfer inlet of the first reverser hole is that Z13=cutting angle S/360, c13=cut angle, where S is the lead; The calculation formula of the starting point coordinates of the chamfer outlet of the first reverser hole is that Z14=Z10+S- (360-h) 8/360,C14=(Z14-Z10-Z11-Z12-Z13) S/360, wherein h is a reverser Kong Kuaju, and Z10 is a Z-axis coordinate of a chamfer inlet of a first reverser hole; S11, obtaining a reducing cutting-in end point distance based on a chamfer outlet of a first reverser hole based on a cutting-in angle; s12, obtaining a translation distance based on a chamfer outlet of the first reverser hole based on the translation angle; S13, obtaining a reducing cutting end point distance based on a chamfer outlet of the first reverser hole based on the cutting angle; The calculation formula of the reducing cutting-in end point distance based on the chamfer outlet of the first reverser hole is that Z15=cutting-in angle S/360, c15=cut angle; The translation amount distance calculation formula based on the chamfer outlet of the first reverser hole is that Z16=translation angle S/720, c16=translation angle/2; the calculation formula of the reducing cutting end point distance based on the chamfer outlet of the first reverser hole is that Z17=cutting angle S/360, c17=cut angle; s14, detecting the machined workpiece, and adjusting the tool setting adjustment quantity of the chamfering starting point of the reverser hole and/or the tool setting adjustment quantity of the thread starting point based on the detection result.
2. The automatic machining method for chamfering bidirectional grinding of a hole with a reverser according to claim 1, wherein the step S2 comprises: S210, enabling the measuring head to move towards the negative direction of the Z axis in parallel to the width direction of the kidney-shaped groove, and recording coordinates Z1 and C1 of the measuring head on the C axis and the Z axis when the measuring head contacts the wall of the kidney-shaped groove; S220, enabling the measuring head to move towards the positive direction of the Z axis in parallel to the width direction of the kidney-shaped groove, and recording coordinates Z2 and C2 of the measuring head on the C axis and the Z axis when the measuring head contacts the wall of the kidney-shaped groove; s230, the midpoint coordinates z3=z1+ (Z1-Z2)/2, c3=c1+ (C1-C2)/2 are calculated.
3. The automatic machining method for chamfering bidirectional grinding of a hole with a reverser according to claim 1, characterized in that the method further comprises: S15, obtaining an n-th reverser hole chamfer inlet coordinate based on an inlet coordinate, an outlet starting point coordinate, a reducing cutting-in end point distance based on a reverser hole chamfer outlet, a translation amount distance based on the reverser hole chamfer outlet and a reducing cutting-out end point distance based on the reverser hole chamfer outlet of the reverser hole chamfer, wherein n is a positive integer greater than 1; S16, repeating the steps S7-S9 to obtain a variable diameter cutting-in terminal distance, a translation distance and a variable diameter cutting-out terminal distance based on the chamfer inlet of the nth reverser hole; S17, obtaining the starting point coordinates of the chamfer outlet of the nth reverser hole based on the inlet coordinates of the chamfer of the nth reverser hole, the reducing cutting-in end point distance, the translation amount distance and the reducing cutting-out end point distance; S18, repeating the steps S11-S13 to obtain a reducing cutting-in end point distance based on the chamfer outlet of the nth reverser hole, a translation amount distance based on the chamfer outlet of the nth reverser hole and a reducing cutting-out end point distance based on the chamfer outlet of the first reverser hole.
4. The automatic machining method for chamfering bidirectional grinding of a hole with a reverser according to claim 1, wherein the middle point coordinates of the waist-shaped groove are Z6 and C6.

Description

Automatic machining method for chamfering bidirectional grinding of hole with reverser Technical Field The invention relates to the technical field of internal thread grinding, in particular to an automatic machining method for bidirectional grinding of a chamfer with a reverser hole. Background A screw-nut typically has several inverter holes, each of which includes an inlet and an outlet, each of which has a reducing chamfer, and when machining an internal thread, the machined screw-nut meets the machining precision requirement, and in the prior art, the tool setting operation is usually performed again after machining each nut, which makes the machining process complicated, and also causes the machining precision to be different between different nuts. And the separate adjustment of each inverter hole during the reworking of the different inverter holes can result in a larger error between the different inverter holes of the same nut. The above problems are to be solved. Disclosure of Invention The invention aims to overcome at least one defect of the prior art and provides an automatic machining method for chamfering and bidirectional grinding of a hole with a reverser, wherein the reverser hole is a waist-shaped groove, and the method comprises the following steps of S1, linking a Z axis and a C axis of a machine tool; S2, acquiring a midpoint coordinate of the waist-shaped groove in the width direction; S3, generating midpoint coordinates of the waist-shaped groove in the length direction based on the midpoint coordinates of the width direction; the method comprises the steps of S4, generating a midpoint coordinate of the waist-shaped groove based on the midpoint coordinate of the width direction and the midpoint coordinate of the length direction, S5, obtaining a grinding starting angle by taking the midpoint coordinate of the waist-shaped groove as a reference and combining a thread starting point tool setting adjustment amount and an actual grinding starting point coordinate, S6, obtaining a first reverser hole chamfering inlet coordinate based on the reverser hole chamfering starting point tool setting adjustment amount, the midpoint coordinate of the waist-shaped groove and the actual grinding starting point coordinate, S7, obtaining a reducing cut-in end point distance based on the first reverser hole chamfering inlet based on the cutting-in angle, S8, obtaining a translation amount distance based on the first reverser hole chamfering inlet based on the translation angle, S9, obtaining a reducing cut-out end point distance based on the first reverser hole chamfering inlet based on the cutting-out angle, S10, obtaining a first reverser hole chamfering outlet coordinate based on the first reverser hole chamfering starting point distance, S11, obtaining a first reverser hole chamfering outlet chamfer outlet based on the cutting-in end point angle based on the cutting-in angle, S12, S13, and finishing the work piece chamfering outlet based on the first reverser chamfering outlet based on the translation amount, S13, and adjusting the tool setting adjustment amount of the chamfer starting point of the reverser hole and/or the tool setting adjustment amount of the thread starting point based on the detection result. Further, the step S2 includes S210, enabling the measuring head to move in the negative Z-axis direction parallel to the width direction of the kidney-shaped groove, recording coordinates Z1 and C1 of the measuring head in the C-axis and Z-axis when the measuring head contacts the wall of the kidney-shaped groove, S220, enabling the measuring head to move in the positive Z-axis direction parallel to the width direction of the kidney-shaped groove, recording coordinates Z2 and C2 of the measuring head in the C-axis and Z-axis when the measuring head contacts the wall of the kidney-shaped groove, S230, calculating midpoint coordinates Z3=Z1+ (Z1-Z2)/2, C3=C1+ (C1-C2)/2. Further, the step S3 includes the steps of S310, moving the measuring head along the length direction of the kidney-shaped groove at the middle position of the width direction of the kidney-shaped groove, S320, measuring to obtain the vertex coordinates of the top semicircle as Z4 and C4, S330, measuring to obtain the vertex coordinates of the bottom semicircle as Z5 and C5, and S340, calculating to obtain the midpoint coordinates of the length direction of the kidney-shaped groove as Z6=Z4+ (Z4-Z5)/2, and C6=C4+ (C4-C5)/2. Further, the step S5 includes S510 of adding the thread start point tool setting adjustment amount L1 with coordinates Z6 and C6 as reference to the middle of the kidney-shaped groove, comparing with the actual grinding start point coordinate Z0, S520 of calculating grinding start point error Z7=Z6+L1-Z0, S530 of grinding start angle C0=C6+Z7360/S, where S is the lead. Further, the step S6 includes S610, wherein Z-axis coordinates of a chamfer inlet of the first reverser hole are absolute coordinates obtai