CN113102804B

CN113102804B - Method for setting dislocation machining hole on reference positioning point

Info

Publication number: CN113102804B
Application number: CN202110369213.1A
Authority: CN
Inventors: 蒋国华; 杨庆明; 潘明强
Original assignee: Changzhou Baoling Heavy and Industrial Machinery Co Ltd
Current assignee: Changzhou Baoling Heavy and Industrial Machinery Co Ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2022-05-17
Anticipated expiration: 2041-04-07
Also published as: CN113102804A

Abstract

The invention discloses a method for setting dislocation processing holes by a reference positioning point, S1, establishing an initial coordinate of a common central line setting plane X axis and Y axis through a first reference and a second reference, and determining the initial processing center coordinate of a first hole and a second hole on each group of flanges by taking the initial coordinate as the reference; s2, semi-finish boring each of the first hole and the second hole; s3, detecting the center coordinates of the first hole and the second hole after the semi-fine boring by using a three-coordinate detector; s4, finely boring the first hole according to the detected center coordinates of the semi-finely bored first hole and the second hole, trial boring the second hole, and detecting the coordinates of the finely bored first hole and the coordinates of the second hole by using a three-coordinate detector; and S5, adjusting the coordinates of the boring bar by the deviation detected by the three-coordinate detector to perform offset fine boring on the second hole. The invention can improve the processing precision of two discrete holes on the same axis.

Description

Method for setting dislocation machining hole on reference positioning point

Technical Field

The invention relates to the technical field of keyway processing, in particular to a method for setting a staggered processing hole on a reference positioning point.

Background

As is known, different processing devices are required to process any product in the machining industry, and the body precision of the processing device is the premise of ensuring the quality of the processed product, so that the use quality of the product cannot be achieved by the conventional method for high-precision and out-of-range products in enterprises due to the characteristics of the enterprises or the reduction of the precision of the processing device due to years of use.

For example, as shown in the workpiece 1 in fig. 1 and 2, a plurality of sets of flanges and a plurality of hollow cylinders 2 are arranged on the circumferential surface of the workpiece 1, the hollow cylinders 2 and each set of flanges are alternately arranged along the circumferential direction of the workpiece 1, each set of flanges includes an upper flange 3 and a lower flange 4, a first hole 5 is arranged on the upper flange 3, and a second hole 6 is arranged on the lower flange 4, wherein the first hole 5 is a through hole, and the second hole 6 is a blind hole. For the processing of the first hole 5 and the second hole 6 in the workpiece 1, vertical boring or horizontal boring is generally adopted, and the precision of processing equipment directly influences the quality of products.

However, in our country, the tolerance allowed when the distance between the standard (GB/T19362.1-2003) ab in checking and accepting processing equipment is 300mm is 0.02mm (as shown in fig. 3), and according to the above calculation principle, as shown in fig. 4, the tolerance allowed when the distance between the first hole 5 and the second hole 6 is H (H is 981mm) is only 0.05/2 to 0.025, and it is known that equipment in general enterprises is difficult to meet the equipment checking and accepting requirements in actual operation, and when some equipment runs for many years, the matching surfaces of all parts are inevitably worn to different degrees. The actual accuracy of the existing gantry mill (MVR35) to be machined is detected to be 0.025mm in the first error L1 of the H1 (300 mm in H1), the second error of the H spacing is converted and calculated to be L2, and the actual measurement value of L2 is 0.0793 mm. Therefore, the existing machining equipment cannot meet the allowable tolerance requirements.

Disclosure of Invention

The invention provides a method for setting a staggered processing hole on a reference positioning point, which can improve the processing precision of two discrete holes positioned on the same axis.

The method for setting the dislocation processing hole on the reference positioning point comprises the following steps:

s1, taking the excircle at one end of the workpiece as a first datum and the excircle at the other end of the workpiece as a second datum, establishing an initial coordinate of a common central line setting plane X axis and a common central line setting plane Y axis through the first datum and the second datum, and determining initial machining center coordinates of the first holes and the second holes on each group of flanges by taking the initial coordinate as the datum;

s2, semi-finish boring each first hole and each second hole according to the initial machining center coordinates of each first hole and each second hole determined in the step S1, and reserving finish boring allowance;

s3, using the initial coordinates of the X axis and the Y axis of the plane set in the step S1 as a reference, and adopting a three-coordinate detector to detect the central coordinates of the first hole and the second hole after the semi-finish boring;

s4, finely boring the first hole according to the detected center coordinates of the semi-finely bored first hole and the second hole, trial boring the second hole, and detecting the coordinates of the finely bored first hole and the coordinates of the second hole by using a three-coordinate detector;

and S5, adjusting the coordinates of the boring rod to perform dislocation fine boring on the second hole by taking the coordinate deviation of the fine boring first hole and the trial boring second hole detected by the three-coordinate detector in the step S4 as the basis, and taking the coordinate of the first hole after fine boring as the reference and the deviation detected by the three-coordinate detector.

Further, in step S4, the trial boring of the second hole refers to fine boring of a portion of the second hole for the three-coordinate detecting apparatus to detect the coordinate deviation between the first hole and the second hole.

Further, fine boring a portion of the second hole refers to fine boring an orifice of the second hole to a portion of 8 to 12mm within the hole.

The invention has the advantages that:

the processing of setting dislocation of the reference positioning point is characterized in that accurate detection data of a high-precision three-coordinate detector are fully utilized to carry out processing, micro dislocation adjustment is carried out due to the deviation of the precision of processing equipment to meet the requirement of product tolerance, the maximum advantage of the method is that processing equipment with low precision can also be used for manufacturing products with approximate high precision, so that multiple processing equipment can meet the requirement of products with different high precision only by utilizing the detection data of one high-precision three-coordinate detector to carry out dislocation fine adjustment on the processing equipment, and each processing equipment does not need to have the high-precision requirement, thereby prolonging the service life of the processing equipment. In addition, for the processing of two discrete holes on the same axis, especially for two discrete holes with larger distance, the method of the invention can ensure that the deviation of the axial position degree of the two discrete holes is within an allowable tolerance range.

Drawings

FIG. 1 is a top view of a workpiece;

FIG. 2 is a cross-sectional view taken along line P-P of FIG. 1;

FIG. 3 is a schematic diagram of the acceptance criteria of the apparatus;

FIG. 4 is a schematic illustration of a prior art method of machining having axial misalignment of a first bore and a second bore;

FIG. 5 is a schematic illustration of axial misalignment of a first bore and a second bore using the method of the present invention;

FIG. 6 is a schematic illustration of the location of a plurality of first holes machined using the method of the present invention;

FIG. 7 is a schematic illustration of the location of a plurality of second holes machined using the method of the present invention;

reference numbers in the drawings:

the workpiece comprises a workpiece 1, a hollow column 2, an upper flange 3, a lower flange 4, a first hole 5, a second hole 6, a first reference A, a second reference B, a first error L1 and a second error L2.

Detailed Description

The present invention will be described in detail with reference to fig. 1, 2, 5 to 7.

The method for setting the dislocation processing hole on the reference positioning point is characterized by comprising the following steps of:

s1, referring to fig. 1 and 2, with the outer circle of one end of the workpiece 1 as a first reference a and the outer circle of the other end of the workpiece 1 as a second reference B, establishing starting coordinates of the X axis and the Y axis of the common center line setting plane by the first reference a and the second reference B, and determining the starting machining center coordinates of the first hole 5 and the second hole 6 on each set of flanges with the starting coordinates as a reference;

s2, semi-finish-boring each of the first and

second holes

5 and 6 with a finish-boring allowance left, based on the starting machining center coordinates of each of the first and

second holes

5 and 6 determined in step S1, as shown in fig. 1 and 2;

s3, referring to fig. 1 and 2, detecting the center coordinates of each of the semi-finish bored first and

second holes

5 and 6 using a three-coordinate detecting machine with the start coordinates of the plane X and Y axes set in step S1 as a reference;

s4, as shown in fig. 5, finely boring the first hole 5, trial boring the second hole 6, and detecting the coordinates of the finely bored first hole 5 and the coordinates of the second hole 6 by using a three-coordinate detector, according to the detected central coordinates of the semi-finely bored first hole 5 and second hole 6;

and S5, referring to FIG. 5, adjusting the coordinates of the boring bar to perform offset fine boring on the second hole 6 by using the coordinates of the finely bored first hole 5 as a reference and the coordinates of the boring bar according to the deviation detected by the three-coordinate detector based on the coordinate deviation of the finely bored first hole 5 and the coordinate deviation of the trial boring of the second hole 6 detected by the three-coordinate detector in the step S4. In this step, the fine boring of the first hole 5 and the pilot boring of the second hole 6 are adopted, so that the center coordinates of the second hole 6 can be further ensured.

With the above-described machining method, as shown in fig. 5, the first error L1 in the axial spacing between the first hole 5 and the second hole 6 is 0.0154mm, and the second error L2 in the spacing H (H is 981mm) is 0.017mm by conversion calculation.

In step S4, the trial boring of the second hole 6 refers to fine boring of a portion of the second hole 6 for the three-coordinate detecting device to detect the coordinate deviation between the first hole 5 and the second hole 6, and preferably, the fine boring of the portion of the second hole 6 refers to fine boring of the opening of the second hole 6 to a portion 8 to 12mm inside the hole. More preferably, finish boring a portion of the second hole 6 means finish boring an aperture of the second hole 6 to a portion within the hole of 10 mm.

A1-E1 shown in FIG. 6 is the coordinates of the center position of the first hole 5 of 5 φ 190, A2-E2 shown in FIG. 7 is the coordinates of the center position of the second hole 6 of 5 φ 158, and the position degrees of the first hole 5 of 5 φ 190 and the second hole 6 of 5 φ 158 are respectively and visually illustrated according to the position coordinates. See table below:

machining position degree of first hole and second hole

It can be directly seen from the above table and from figures 6 and 7 that all data are within 2 times the requirement of 0.05. Therefore, when the company processes similar products, the concept of the processing method of setting the dislocation of the reference positioning point is widely applied and is effective, and favorable results are obtained to a certain extent. And (4) conclusion: the practice of the processing method for setting the dislocation of the reference positioning point shows that the method completely meets the technical requirements of products.

The above description is only an exemplary embodiment of the present invention, and should not be taken as limiting the scope of the invention, and any person skilled in the art should understand that they can make equivalent changes and modifications without departing from the concept and principle of the present invention.

Claims

1. The method for setting the dislocation processing hole on the reference positioning point is characterized by comprising the following steps of:

s1, taking the excircle at one end of the workpiece (1) as a first datum (A) and the excircle at the other end of the workpiece (1) as a second datum (B), establishing an initial coordinate of an X axis and a Y axis of a common central line setting plane through the first datum (A) and the second datum (B), and determining initial machining center coordinates of a first hole (5) and a second hole (6) on each group of flanges by taking the initial coordinate as a datum;

s2, semi-finish boring each of the first hole (5) and the second hole (6) according to the initial machining center coordinates of each of the first hole (5) and the second hole (6) determined in the step S1, and reserving finish boring allowance;

s3, using the initial coordinates of the X axis and the Y axis of the plane set in the step S1 as a reference, and adopting a three-coordinate detector to detect the central coordinates of the first hole (5) and the second hole (6) after each semi-fine boring;

s4, carrying out fine boring on the first hole (5) and trial boring on the second hole (6) according to the detected central coordinates of the first hole (5) and the second hole (6) after semi-fine boring, and detecting the coordinates of the first hole (5) and the coordinates of the second hole (6) after fine boring by adopting a three-coordinate detector;

and S5, adjusting the coordinates of the boring rod to carry out dislocation fine boring on the second hole (6) by taking the coordinate deviation of the fine boring first hole (5) and the second hole (6) detected by the three-coordinate detector in the step S4 as the basis, and taking the coordinates of the first hole (5) after fine boring as the reference and the deviation detected by the three-coordinate detector.

2. The method for setting the staggered machining hole according to the datum positioning point of claim 1, wherein in step S4, the trial boring of the second hole (6) is to finish bore a part of the second hole (6) so that a three-coordinate detecting machine can detect the coordinate deviation between the first hole (5) and the second hole (6).

3. The method for setting the malposition hole according to the datum anchor point of claim 2, wherein the fine boring of a portion of the second hole (6) means fine boring of the orifice of the second hole (6) to a portion of 8 to 12mm inside the hole.