CN110695763A - Machining method for transmission shaft hole of high-power diesel engine body - Google Patents

Machining method for transmission shaft hole of high-power diesel engine body Download PDF

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Publication number
CN110695763A
CN110695763A CN201910746826.5A CN201910746826A CN110695763A CN 110695763 A CN110695763 A CN 110695763A CN 201910746826 A CN201910746826 A CN 201910746826A CN 110695763 A CN110695763 A CN 110695763A
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Prior art keywords
transmission shaft
shaft hole
hole
circle
center
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位宝磊
李瑞杰
郝波
任海亮
郝敬
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Henan Diesel Heavy Industry Co Ltd
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Henan Diesel Heavy Industry Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
    • B23Q15/20—Automatic control or regulation of feed movement, cutting velocity or position of tool or work before or after the tool acts upon the workpiece

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  • Mechanical Engineering (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

The invention belongs to the technical field of diesel engines, and relates to a method for processing a transmission shaft hole of a high-power diesel engine body. The provided method for processing the transmission shaft hole of the high-power diesel engine body firstly completes the processing of a main shaft hole, a camshaft hole I and a camshaft hole II of the diesel engine body; then processing a transmission shaft hole I, a transmission shaft hole II, a transmission shaft hole III and a transmission shaft hole IV by taking the main shaft hole, the camshaft hole I and the camshaft hole II as references; the machining method of the transmission shaft holes of the high-power diesel engine body, provided by the invention, can ensure the dimensional accuracy of the center distance between the shaft holes and the dimensional accuracy of the coordinates of the transmission shaft holes, and has important significance for improving the machining quality of the high-power diesel engine body.

Description

Machining method for transmission shaft hole of high-power diesel engine body
Technical Field
The invention belongs to the technical field of diesel engines, and relates to a method for processing a transmission shaft hole of a high-power diesel engine body.
Background
The engine body is one of the basic parts of the diesel engine and is a framework of the diesel engine, almost all moving parts and fixed parts of the diesel engine are arranged inside and outside the engine body, and the processing quality of the engine body directly influences the working performance of the diesel engine. The precision requirements among a main shaft, a camshaft, a main shaft hole of a transmission gear, a camshaft hole and a transmission shaft hole are high, wherein the main shaft hole and the camshaft hole are multi-gear shaft holes penetrating through the whole length of the machine body, and the transmission shaft hole only exists on one gear of the end face of the machine body; in actual processing, the processing precision of the main shaft hole, the cam shaft hole and the transmission shaft hole is ensured at the same time, and the difficulty is very high.
The most ideal processing method is to manufacture a large-scale special machine and process the main shaft hole, the camshaft hole and the transmission shaft hole of the diesel engine body in one-time positioning to ensure the processing precision, but for the large-power diesel engine body, the machine body has large volume and the manufacturing difficulty of the special machine is large, so that no successful case for manufacturing the special machine exists at present.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a method for processing a transmission shaft hole of a high-power diesel engine body.
The invention adopts the following technical scheme for achieving the purpose:
a processing method of a transmission shaft hole of a high-power diesel engine body comprises the following steps: firstly, machining a main shaft hole, a camshaft hole I and a camshaft hole II of a diesel engine body; then processing a transmission shaft hole I, a transmission shaft hole II, a transmission shaft hole III and a transmission shaft hole IV by taking the main shaft hole, the camshaft hole I and the camshaft hole II as references;
the specific steps for processing the transmission shaft hole I, the transmission shaft hole II, the transmission shaft hole III and the transmission shaft hole IV are as follows:
1) measuring the circle center coordinates of the processed spindle hole, the processed camshaft hole I and the processed camshaft hole II by using a three-coordinate measuring machine: coordinates (x) of spindle hole1，y1) Coordinates (x) of camshaft bore I2，y2) And coordinates (x) of camshaft bore II3，y3) (ii) a Then order (x)1=0，y1= 0), the measurement record yields (x)2，y2）、（x3，y3) Specific numerical values of
Figure DEST_PATH_271374DEST_PATH_IMAGE001
；
2) The center coordinates (x) of the transmission shaft hole I, the transmission shaft hole II, the transmission shaft hole III and the transmission shaft hole IV are listed according to the principle that intersection points are obtained when circles and circles intersect and intersection points are obtained when circles and straight lines intersect4，y4）、（x5，y5）、（x6，y6) And (x)7，y7) The formula of (2) is to be considered in two cases when the formula is solved in a column;
in the first case: circle center coordinates (x) of transmission shaft hole I, transmission shaft hole III and transmission shaft hole IV4，y4）、（x6，y6) And (x)7，y7) Solving; as the solving principles of the transmission shaft hole I, the transmission shaft hole III and the transmission shaft hole IV are the same, the circle center coordinate (x) of the transmission shaft hole I is only given below4，y4) The specific calculation process of the solving formula (2) is as follows:
(1) firstly, the center of a circle of the machined camshaft hole I is used
Figure DEST_PATH_DEST_PATH_IMAGE002
As the center of a circle, the center distance R between the camshaft hole I and the transmission shaft hole I24To draw circle I for the radius, the equation for circle I is given:
Figure DEST_PATH_313148DEST_PATH_IMAGE003
；
(2) then, the center (x) of the processed spindle hole is used1，y1) Set as (0,0) point, the theoretical ordinate of the transmission shaft hole I required by the drawing
Figure DEST_PATH_DEST_PATH_IMAGE004
Making a straight line, listing the equation of the straight line:
Figure DEST_PATH_404470DEST_PATH_IMAGE005
；
(3) simultaneous equations:
formula ①
The intersection point of the circle I and the straight line is the center (x) of the transmission shaft hole I to be solved4，y4) 2 groups of solutions are obtained through solving, namely 2 points exist at the intersection point;
in the second case: circle center coordinate (x) of transmission shaft hole II5，y5) The specific calculation process of (2) is as follows:
(1) firstly, the center of a circle of the machined camshaft hole I is used
Figure DEST_PATH_927243DEST_PATH_IMAGE007
As the center of a circle, the center distance R between the camshaft hole I and the transmission shaft hole II25Circle II is drawn for the radius, the equation for circle II is shown:
Figure DEST_PATH_DEST_PATH_IMAGE008
；
(2) then taking the circle center of the processed spindle hole as the circle center, and according to the center distance R between the spindle hole and the hole 1 and the transmission shaft hole II15To draw circle III for radius, the equation for circle III is set forth: x is the number of2+y2=(R15)2
(3) Simultaneous equations:
Figure DEST_PATH_866249DEST_PATH_IMAGE009
formula ②
The intersection point of the circle II and the circle III is the center (x) of the transmission shaft hole II to be solved5，y5) 2 groups of solutions are obtained through solving, namely 2 points exist at the intersection point;
3): the center coordinates of the camshaft hole I actually measured in the step 1)
Figure DEST_PATH_626394DEST_PATH_IMAGE007
Substitution of numerical value ofThe coordinates of each intersection are obtained from equations ① and ②.
4): then according to the corresponding values of the transmission shaft hole I and the transmission shaft hole II given by the drawing, eliminating the points which do not meet the requirements, and finally obtaining the circle center coordinates (x) of the transmission shaft hole I and the transmission shaft hole II4，y4）、（x5，y5）。
Similarly, the circle center coordinates (x) of the transmission shaft hole III and the transmission shaft hole IV can be obtained by using the solution principle of the circle center coordinates of the transmission shaft hole I6，y6) And (x)7，y7）。
5): numerical control machine tool 4) to calculate the center coordinates (x) of the transmission shaft holes I-IV4，y4）、（x5，y5）、（x6，y6) And (x)7，y7) And finally finishing the processing of the transmission shaft holes I-IV.
The machining method of the transmission shaft holes of the high-power diesel engine body, provided by the invention, can ensure the dimensional accuracy of the center distance between the shaft holes and the dimensional accuracy of the coordinates of the transmission shaft holes, and has important significance for improving the machining quality of the high-power diesel engine body.
Drawings
Fig. 1 is an end view of a high power diesel engine body.
Fig. 2 is a schematic diagram of the mutual dimensions of the shaft holes on the end face of the body of a certain high-power diesel engine.
FIG. 3 is a schematic diagram of the center of a circle of a transmission shaft hole I on the end face of a body of a large-power diesel engine.
FIG. 4 is a schematic diagram of the center of a circle of a transmission shaft hole II on the end face of a body of a large-power diesel engine.
In fig. 1: 1. the cam shaft comprises a main shaft hole 2, cam shaft holes I and 3, cam shaft holes II and 4, transmission shaft holes I and 5, transmission shaft holes II and 6, transmission shaft holes III and 7 and a transmission shaft hole IV.
In fig. 2: all center distances R between the shaft holes are given by a drawing, and coordinates (x) of the shaft holes 1-3 of multiple gears1，y1）、（x2，y2）、（x3，y3) Determined by actual measurement;
（x1，y1) Coordinates of the center of the hole 1, R15-distance between the centers of hole 1 and hole 5;
（x2，y2) Coordinates of the center of the hole 2, R23Distance between centers of holes 2 and 3, R24Distance between centers of holes 2 and 4, R25Distance between centers of holes 2 and 5, R27-distance between the centres of holes 2 and 7;
（x3，y3) Coordinates of the center of the hole 3, R36-distance between the centres of holes 3 and 6;
（x4，y4) -coordinates of the centre of the hole 4;
（x5，y5) -coordinates of the centre of the hole 5;
（x6，y6) -coordinates of the centre of the hole 6;
（x7，y7) -the coordinates of the centre of the hole 7.
In fig. 3:
Figure DEST_PATH_DEST_PATH_IMAGE010
is an actual measurement of the coordinates of the centre of the hole 2,
Figure DEST_PATH_18061DEST_PATH_IMAGE011
is the theoretical coordinate value of the hole 4 given by the drawing.
In fig. 4:
Figure DEST_PATH_DEST_PATH_IMAGE012
is an actual measurement of the coordinates of the centre of the hole 2,is the theoretical coordinate value of the hole 5 given by the drawing.
Detailed Description
The invention is described in connection with the accompanying drawings and the specific embodiments:
as shown in fig. 1, a method for processing a transmission shaft hole of a high-power diesel engine body comprises the following steps: firstly, machining a main shaft hole, a camshaft hole I and a camshaft hole II of a diesel engine body; then processing a transmission shaft hole I, a transmission shaft hole II, a transmission shaft hole III and a transmission shaft hole IV by taking the main shaft hole, the camshaft hole I and the camshaft hole II as references; the specific steps for processing the transmission shaft hole I, the transmission shaft hole II, the transmission shaft hole III and the transmission shaft hole IV are as follows: the schematic dimension diagrams of the main shaft hole, the camshaft hole I, the camshaft hole II, the transmission shaft hole I, the transmission shaft hole II, the transmission shaft hole III and the transmission shaft hole IV are shown in figure 2,
the method comprises the following steps: firstly, processing of a main shaft hole, a camshaft hole I and a camshaft hole II 3 which penetrate through the whole length can be completed, and a special machine can be used during processing to ensure the processing precision of the main shaft hole, the camshaft hole I and the camshaft hole II;
step two: measuring the center coordinates (x) of the processed spindle hole, camshaft hole I and camshaft hole II by using a three-coordinate measuring machine1，y1）、（x2，y2) And (x)3，y3) Measurement of time (x)1=0，y1= 0) and record the measured (x)2，y2）、（x3，y3) Specific numerical values of
Figure DEST_PATH_531476DEST_PATH_IMAGE014
；
Step three: the coordinates (x) of the center of the transmission shaft holes I to IV are listed according to intersection points of circles and straight lines and intersection points of circles and straight lines4，y4）、（x5，y5）、（x6，y6) And (x)7，y7) The formula of (2) is to be considered in two cases when the formula is solved in a column;
in the first case: circle center coordinates (x) of transmission shaft hole I, hole III and hole IV4，y4）、（x6，y6) And (x)7，y7) And (4) solving. Since the solution principles of the driving shaft holes I, the driving shaft holes III and the driving shaft holes IV are the same, only the circle center coordinates (x) of the driving shaft holes I are listed in the text4，y4) The specific calculation process of the solving formula (2) is as follows:
1) firstly, the center of a circle of the machined camshaft hole I is used
Figure DEST_PATH_138037DEST_PATH_IMAGE002
As the center of a circle, the center distance R of the camshaft hole I and the transmission shaft hole I required by the drawing24To draw circle I for the radius, the equation for circle I is given:
Figure DEST_PATH_318352DEST_PATH_IMAGE003
；
2) then the circle center (x) of the processed hole 1 is processed1，y1) Set as (0,0) point, the theoretical ordinate of the transmission shaft hole I required by the drawing
Figure DEST_PATH_10364DEST_PATH_IMAGE004
Making a straight line, listing the equation of the straight line:
Figure DEST_PATH_934327DEST_PATH_IMAGE005
；
3) simultaneous equations:
Figure DEST_PATH_395395DEST_PATH_IMAGE006
formula ①
With reference to FIG. 3, the intersection of the circle I and the straight line is the center (x) of the transmission shaft hole I to be solved4，y4) And 2 groups of solutions are obtained through solving, namely 2 points exist at the intersection point.
In the second case: circle center coordinate (x) of transmission shaft hole II5，y5) The specific calculation process of (2) is as follows:
1) firstly, the center of a circle of the machined camshaft hole I is used
Figure DEST_PATH_12190DEST_PATH_IMAGE007
The center distance R of the camshaft hole I and the transmission shaft hole II required by the drawing is used as the center of a circle25Circle II is drawn for the radius, the equation for circle II is shown:
Figure DEST_PATH_191499DEST_PATH_IMAGE008
；
2) then taking the circle center of the processed hole 1 as the circle center, and obtaining the center distance R between the hole 1 and the transmission shaft hole II required by the drawing15To draw circle III for radius, the equation for circle III is set forth: x is the number of2+y2=(R15)2；
3) Simultaneous equations:
Figure DEST_PATH_656503DEST_PATH_IMAGE009
formula ②
Referring to FIG. 4, the intersection point of circle II and circle III is the center (x) of the transmission shaft hole II to be solved5，y5) And 2 groups of solutions are obtained through solving, namely 2 points exist at the intersection point.
Step four: the center coordinates of the camshaft hole I actually measured in the step two are measured
Figure DEST_PATH_DEST_PATH_IMAGE015
The numerical values of (2) are substituted into solving formulas ① and ② in step three to obtain the coordinates of each intersection.
Then according to the corresponding values of the transmission shaft hole I and the transmission shaft hole II given by the drawing, eliminating the points which do not meet the requirements, and finally obtaining the circle center coordinates (x) of the transmission shaft hole I and the transmission shaft hole II4，y4）、（x5，y5）。
Similarly, the circle center coordinates (x) of the transmission shaft holes III and IV can be obtained by using the solution principle of the circle center coordinates of the transmission shaft hole I6，y6) And (x)7，y7）。
Step five: the numerical control machine tool calculates and obtains the circle center coordinates (x) of the transmission shaft holes I to IV by using the four steps4，y4）、（x5，y5）、（x6，y6) And (x)7，y7) And finally finishing the processing of the transmission shaft holes I-IV.
The invention provides a method for processing a transmission shaft hole of a high-power diesel engine body, which is not only limited to processing the transmission shaft hole of the high-power diesel engine body, but also suitable for processing other parts with similar multi-shaft holes.

Claims (1)

1. A processing method of a transmission shaft hole of a high-power diesel engine body comprises the following steps: firstly, machining a main shaft hole, a camshaft hole I and a camshaft hole II of a diesel engine body; then processing a transmission shaft hole I, a transmission shaft hole II, a transmission shaft hole III and a transmission shaft hole IV by taking the main shaft hole, the camshaft hole I and the camshaft hole II as references;
the method is characterized in that: the specific steps for processing the transmission shaft hole I, the transmission shaft hole II, the transmission shaft hole III and the transmission shaft hole IV are as follows:
1) measuring the circle center coordinates of the processed spindle hole, the processed camshaft hole I and the processed camshaft hole II by using a three-coordinate measuring machine: coordinates (x) of spindle hole1，y1) Coordinates (x) of camshaft bore I2，y2) And coordinates (x) of camshaft bore II3，y3) (ii) a Then order (x)1=0，y1= 0), the measurement record yields (x)2，y2）、（x3，y3) Specific numerical values of；
2) The center coordinates (x) of the transmission shaft hole I, the transmission shaft hole II, the transmission shaft hole III and the transmission shaft hole IV are listed according to the principle that intersection points are obtained when circles and circles intersect and intersection points are obtained when circles and straight lines intersect4，y4）、（x5，y5）、（x6，y6) And (x)7，y7) The formula of (2) is to be considered in two cases when the formula is solved in a column;
first kind of situationThe following conditions: circle center coordinates (x) of transmission shaft hole I, transmission shaft hole III and transmission shaft hole IV4，y4）、（x6，y6) And (x)7，y7) Solving; as the solving principles of the transmission shaft hole I, the transmission shaft hole III and the transmission shaft hole IV are the same, the circle center coordinate (x) of the transmission shaft hole I is only given below4，y4) The specific calculation process of the solving formula (2) is as follows:
(1) firstly, the center of a circle of the machined camshaft hole I is used
Figure RE-992004DEST_PATH_IMAGE002
As the center of a circle, the center distance R between the camshaft hole I and the transmission shaft hole I24To draw circle I for the radius, the equation for circle I is given:
Figure RE-854918DEST_PATH_IMAGE004
；
(2) then, the center (x) of the processed spindle hole is used1，y1) Set as (0,0) point, the theoretical ordinate of the transmission shaft hole I required by the drawing
Figure RE-DEST_PATH_IMAGE006
Making a straight line, listing the equation of the straight line:
Figure RE-DEST_PATH_IMAGE008
；
(3) simultaneous equations:
Figure RE-266176DEST_PATH_IMAGE009
formula ①
The intersection point of the circle I and the straight line is the center (x) of the transmission shaft hole I to be solved4，y4) 2 groups of solutions are obtained through solving, namely 2 points exist at the intersection point;
in the second case: circle center coordinate (x) of transmission shaft hole II5，y5) The specific calculation process of (2) is as follows:
(1) firstly, the center of a circle of the machined camshaft hole I is used
Figure RE-265356DEST_PATH_IMAGE011
As the center of a circle, the center distance R between the camshaft hole I and the transmission shaft hole II25Circle II is drawn for the radius, the equation for circle II is shown:；
(2) then taking the circle center of the processed spindle hole as the circle center, and according to the center distance R between the spindle hole and the hole 1 and the transmission shaft hole II15To draw circle III for radius, the equation for circle III is set forth: x is the number of2+y2=(R15)2
(3) Simultaneous equations:
Figure RE-DEST_PATH_IMAGE013
formula ②
The intersection point of the circle II and the circle III is the center (x) of the transmission shaft hole II to be solved5，y5) 2 groups of solutions are obtained through solving, namely 2 points exist at the intersection point;
3): the center coordinates of the camshaft hole I actually measured in the step (1) are measured
Figure RE-226404DEST_PATH_IMAGE002
Substituting the numerical value into a formula ① and a formula ② to obtain the coordinates of each intersection point;
4): then according to the corresponding values of the transmission shaft hole I and the transmission shaft hole II given by the drawing, eliminating the points which do not meet the requirements, and finally obtaining the circle center coordinates (x) of the transmission shaft hole I and the transmission shaft hole II4，y4）、（x5，y5）；
Similarly, the circle center coordinates (x) of the transmission shaft hole III and the transmission shaft hole IV can be obtained by using the solution principle of the circle center coordinates of the transmission shaft hole I6，y6) And (x)7，y7）；
5): numerical control machine tool 4) to calculate the center coordinates (x) of the transmission shaft holes I-IV4，y4）、（x5，y5）、（x6，y6) And (x)7，y7) And finally finishing the processing of the transmission shaft holes I-IV.
CN201910746826.5A 2019-08-14 2019-08-14 Machining method for transmission shaft hole of high-power diesel engine body Withdrawn CN110695763A (en)

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Application Number Priority Date Filing Date Title
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5885681A (en) * 1981-11-18 1983-05-23 Hitachi Ltd Positioning method of cabinet
CN101158863A (en) * 2007-11-20 2008-04-09 中国北车集团北京二七机车厂有限责任公司 Accurate positioning processing method of IC engine airframe intermediary hole
CN105598742A (en) * 2016-03-07 2016-05-25 潍柴重机股份有限公司 Method for setting machining original points for workpieces
CN108406440A (en) * 2018-02-07 2018-08-17 东方电气集团东方锅炉股份有限公司 Arc section class workpiece surface position coordinate acquisition methods to be processed on rotary table

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5885681A (en) * 1981-11-18 1983-05-23 Hitachi Ltd Positioning method of cabinet
CN101158863A (en) * 2007-11-20 2008-04-09 中国北车集团北京二七机车厂有限责任公司 Accurate positioning processing method of IC engine airframe intermediary hole
CN105598742A (en) * 2016-03-07 2016-05-25 潍柴重机股份有限公司 Method for setting machining original points for workpieces
CN108406440A (en) * 2018-02-07 2018-08-17 东方电气集团东方锅炉股份有限公司 Arc section class workpiece surface position coordinate acquisition methods to be processed on rotary table

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