CN105328398A - Method for machining three-section barrel combined faces of large mill - Google Patents
Method for machining three-section barrel combined faces of large mill Download PDFInfo
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- CN105328398A CN105328398A CN201510759129.5A CN201510759129A CN105328398A CN 105328398 A CN105328398 A CN 105328398A CN 201510759129 A CN201510759129 A CN 201510759129A CN 105328398 A CN105328398 A CN 105328398A
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- cylindrical shell
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
- B23P13/02—Making metal objects by operations essentially involving machining but not covered by a single other subclass in which only the machining operations are important
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
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Abstract
The invention relates to the technical field of machining, in particular to a method for machining three-section barrel combined faces of a large mill. The method comprises the steps that 120-degree barrels are aligned according to inner circles of the barrels and then fixed to a workbench of a numerical control machine tool, and process blocks are welded to barrel supports in the 120-degree barrels; machining datum lines of the process blocks are determined on the numerical control machine tool according to the radius of the inner circles of the 120-degree barrels and the chord length of the inner circles at the 120-degree barrel combined faces, and therefore the upper plane, two side faces and two inclined faces of each process block are machined, and it is guaranteed that a 120-degree included angle is formed between the two inclined faces of each process block; and the feed vector between the two inclined faces of each process block and the 120-degree barrel combined faces is determined through calculation, and then the 120-degree barrel combined faces are machined. The machining surfaces of the process blocks are adopted as the auxiliary datum for machining and measuring of the 120-degree barrel combined faces, and finally the 120-degree barrel combined faces are machined.
Description
Technical field
The present invention relates to Machining Technology field, be specifically related to a kind of processing method of large-sized grinder three lobe cylindrical shell faying face.
Background technology
Along with the development of mining industry, the demand of large-sized grinder is got more and more.In actual applications, the distinguish cylindrical shell of large-sized grinder is main mainly with two lobes, pintongs, its processing method is also substantially identical: first form half cylindrical shell (180 ° of cylindrical shells) by many lobes cylindrical shell, then with 180 ° of planes for benchmark, the faying face that processing two halves cylindrical shell connects, the manufacturing process flow of final composition full circle cylindrical shell.Each lobe cylindrical shell of three lobe cylindrical shells is welded by 120 ° of cylinders, two end flanges and two longitudinal flanges, ensure the circularity of full circle cylindrical shell, except the curling of cylindrical shell and welding reach except requirement, the most important thing is to solve a conjunction precision of faying face between three lobes, 120 ° of cylindrical shells, the processing and manufacturing difficult point of its faying face is not machining benchmark accurately.The present invention is by a kind of effective secondary process benchmark of design and subsidiary benchmark, this type of part is realized by auxiliary base to precision machined transformation technology on high-precision Digit Control Machine Tool, for processing and manufacturing from now at any angle distinguish cylindrical shell effective theory and practice foundation is provided.
Summary of the invention
The object of this invention is to provide a kind of processing method of large-sized grinder three lobe cylindrical shell faying face, to realize the processing of the faying face to each lobe cylindrical shell in three lobe cylindrical shells (i.e. 120 ° of cylindrical shells).
Described in the present invention 120 ° cylindrical shell faying face, refers to three lobe cylindrical shells when being combined into full circle cylindrical shell, 120 ° of planes that cylindrical shell combines that each 120 ° of cylindrical shells are adjacent with both sides, and the angle between the two basic change face of each 120 ° of cylindrical shell both sides is 120 °.
For achieving the above object, technical scheme of the present invention is: a kind of processing method of large-sized grinder three lobe cylindrical shell faying face, comprises the steps:
(1), by 120 ° of cylindrical shells by being fixed on the workbench of Digit Control Machine Tool after cylindrical shell inner circle centering;
(2) welding procedure block in the barrel support, in 120 ° of cylindrical shells, for the auxiliary base as 120 ° of cylindrical shell faying face processing;
(3), in Digit Control Machine Tool X-Z coordinate system, according to the inner circle radius of 120 ° of cylindrical shells and the inner circle chord length at 120 ° of cylindrical shell faying face places, the center of circle O of three datum lines V, U, W and 120 ° of cylindrical shell inner circles is determined; Described V datum line is the straight line at inner circle chord length place, 120 ° of cylindrical shell faying face places, and this straight line parallel is in numerically controlled machine; U datum line is the vertical center line of 120 ° of cylindrical shell faying face place inner circle chord lengths; W datum line is one and becomes 120 ° of angles with U datum line, and is parallel to the straight line of 120 ° of cylindrical shell faying faces;
(4), process the two sides of technique block according to U datum line, and ensure that the two sides of technique block are relative to U datum line centering; The upper plane of technique block is processed according to V datum line; Process two inclined-planes of technique block according to W datum line, and ensure that two inclined-planes of technique block are 120 ° of angles;
(5), with the intersection point O1 of U datum line and W datum line for feed initial point, calculate the vertical range a of two inclined-planes to 120 ° of cylindrical shell faying faces of technique block, thus obtain the feed vector of feed initial point O1 to 120 ° of cylindrical shell faying faces, and then process 120 ° of cylindrical shell faying faces.
Beneficial effect: the present invention is welding procedure block in the barrel support in 120 ° of cylindrical shells, utilize the processing of the finished surface of technique block as 120 ° of cylindrical shell faying faces, the auxiliary base of measurement, realize the conversion to the machining benchmark of 120 ° of cylindrical shell faying faces, the full circle finally for realizing grinding machine three lobe cylindrical shell combines and provides necessary condition.
The processing method of the present invention to three lobe cylindrical shell faying faces solves the problem of the angle of processing cylindrical shell faying face, dimensional accuracy and the several respects such as flatness, perpendicularity precision, for processing and manufacturing from now at any angle distinguish cylindrical shell provide effective theory and practice foundation.
Accompanying drawing explanation
Fig. 1 is the structural representation of three lobe cylindrical shells;
Fig. 2 is the 120 ° of tube structure figure being welded with technique block;
Fig. 3 is the machine tooling schematic diagram of 120 ° of cylindrical shells;
Fig. 4 is the processing Mathematical Modeling figure of 120 ° of cylindrical shell faying faces;
Be labeled as in figure: 1-end flanges; 2-longitudinal flange; 3-120 ° of cylindrical shells; 4-barrel support; 5-technique block; 6-shell liner hole; 7-platen; 8-square chest; 9-jack; 10-pull bar; 11-end flanges cylindrical; 12-cylindrical shell cylindrical; 13-longitudinal flange faying face (being equivalent to said 120 ° of cylindrical shell faying faces in the present invention); 14-cylindrical shell inner circle;
O-cylindrical shell inner circle center of circle; R-cylindrical shell inner circle radius; α-cylindrical shell inner circle center of circle is to the angle 120 ° of cylindrical shell both sides longitudinal flange faying face; V-datum line (namely the straight line at inner circle chord length place, 120 ° of cylindrical shell faying face places, is parallel to platen); W-datum line (namely become 120 ° of angles with U datum line, and be parallel to the straight line of 120 ° of cylindrical shell faying faces, also the extended line on established technology block inclined-plane); U-datum line (i.e. the vertical center line of 120 ° of cylindrical shell faying face place inner circle chord lengths); O1-feed initial point (intersection point of U datum line and W datum line is also the origin of coordinates of cutter); T(a)-feed vector (origin of coordinates of machine tool is to the vector needing the 120 ° of cylindrical shell faying faces processed); Two inclined-planes of a-technique block are to the vertical range of 120 ° of cylindrical shell faying faces; The distance of plane on H-inner circle center of circle O to technique block; The distance of plane on h1-O1 to technique block; The distance of h2-inner circle center of circle O to tool coordinate initial point O1;
the half of plane width on-technique block.
Detailed description of the invention
Be processed as example with φ 11.0 × 5.4m semi-autogenous mill cylindrical shell of applicant's development, to the manufacture method of three lobe cylindrical shells, and the processing method of 120 ° of cylindrical shell faying faces is described.According to designing requirement, cylindrical shell divides three lobe compositions, maximum flange diameter Φ 11630mm, diameter of bore Φ 11000mm, height 5430mm, nt wt net weight: 141603Kg, as shown in Figure 1.Cylindrical shell end flanges faces parallel 0.05mm, end flanges cylindrical cylindricity 0.05mm, for ensureing the machining accuracy of overall cylindrical shell, just need the high-precision conjunction rate closing misalignment precision, longitudinal flange 2 faying face Anawgy accuracy (0.04mm clearance gauge does not enter) and longitudinal flange 2 faying face connection holes of solution three lobe cylindrical shell, need strict Angular Dimension precision and the chord length dimensional accuracy controlling three lobes, 120 ° of cylindrical shells in process, ensure the uniformity of its dimensional accuracy.For the processing of 120 ° of cylindrical shell faying faces, the present invention is welding procedure block 5 in cylindrical shell inner support 4, utilizes the processing of technique block as 120 ° of cylindrical shell faying faces, the auxiliary base of measurement, realizes by auxiliary base to precision machined conversion.
Each the lobe cylindrical shell i.e. manufacturing technology of 120 ° of cylindrical shells in large-sized grinder three lobe cylindrical shell, comprises product blank welding fabrication stage and Product processing stage.
The described blank welding fabrication stage comprises the following steps:
1, steel plate rolls full circle cylindrical shell and welds barrel support 4.The full circle cylindrical shell that roll of steel plate is made, steel plate leaves the gap for welding longitudinal flange 2 in advance in the longitudinal junction of 120 ° of cylindrical shells.
2, Welding block 5 in barrel support 4.
3, welding ends flange 1 and longitudinal flange 2, ensures circularity and the perpendicularity of full circle cylindrical shell.Strict control barrel soldering, rectification precision, the cylindrical shell after rectification, ensures cylindrical shell inner circle 14 bus perpendicularity 3mm.
The described Product processing stage, also be the processing method of large-sized grinder three lobe cylindrical shell faying face of the present invention, in processing specific to the large-sized grinder three lobe cylindrical shell faying face of reality, what refer to is exactly the processing of the longitudinal flange faying face of 120 ° of cylindrical shell both sides, the i.e. processing of said 120 ° of cylindrical shell faying faces in the present invention, specifically comprises the following steps:
(1), by 120 ° of cylindrical shells by being fixed on the workbench of Digit Control Machine Tool after cylindrical shell inner circle centering;
In this step, the centering operating process of 120 ° of cylindrical shells is: by cylindrical shell inner circle 14 alignment, looks for directly by end flanges 1 and longitudinal flange 2 surrounding, levelling.Particularly, along the circumferential direction distribute 5 places, and messenger wire checks cylindrical shell perpendicularity.With cylindrical shell inner circle for benchmark marks the center of circle, and check cylinder roundness in the upper and lower two sections of cylindrical shell inner circle, the measurement point in each cross section is no less than 3 places.Cylindrical shell upper/lower terminal face processing line and 120 ° of cylindrical shell faying face processing lines (requiring that two ends flange thickness is consistent) are marked after qualified.Guarantee the welding of cylindrical shell and the processing roughing standard unification of flange faying face, make the centering of cylindrical shell, be scribed ss optimum state.
Root Ju clamping needs, and on 6, liner plate hole, preboring is upper connecting rod 10, is fixed on square chest 8 by jack 9 and pull bar 10, and square chest is fixed on platen 7, is then fixed on numerically controlled machine by 120 ° of cylinder inboard walls towards machine tool chief axis, sees Fig. 3.
(2) welding procedure block in the barrel support, in 120 ° of cylindrical shells, for the auxiliary base as 120 ° of cylindrical shell faying face processing; (this step can be placed on blank welding fabrication stage carry out).
(3), in Digit Control Machine Tool X-Z coordinate system, according to the inner circle radius of 120 ° of cylindrical shells and the inner circle chord length at 120 ° of cylindrical shell faying face places, the center of circle O of three datum lines V, U, W and 120 ° of cylindrical shell inner circles is determined; Described V datum line is the straight line at inner circle chord length place, 120 ° of cylindrical shell faying face places, and this straight line parallel is in numerically controlled machine; U datum line is the vertical center line of 120 ° of cylindrical shell faying face place inner circle chord lengths; W datum line is one and becomes 120 ° of angles with U datum line, and is parallel to the straight line of 120 ° of cylindrical shell faying faces;
As can be seen from Figure 1, during three lobe 120 ° cylindrical shell composition full circle, the chord length at cylindrical shell inner circle faying face place must be consistent, and chord length and cylindrical shell inner circle radius are two known conditions.The center of circle O of three datum lines V, U, W and cylindrical shell inner circle is found according to these two known conditions.Have found above-mentioned three datum lines, also just have found the relation between 120 ° of cylindrical shells and technique block.
(4), this step is according to three datum lines U, V, W finding and cylindrical shell inner circle center of circle O processing technology block: the two sides processing technique block according to U datum line, and ensures that the two sides of technique block are relative to U datum line centering; The upper plane of technique block is processed according to V datum line; Process two inclined-planes of technique block according to W datum line, and ensure that two inclined-planes of technique block are 120 ° of angles; By the processing of model characterization processes block.
(5), with the intersection point O1 of U datum line and W datum line for feed initial point, calculate the vertical range a of two inclined-planes to 120 ° of cylindrical shell faying faces of technique block, thus obtain the feed vector of feed initial point O1 to 120 ° of cylindrical shell faying faces, and then process 120 ° of cylindrical shell faying faces.
In this step, feed vector T(a) be calculated as follows:
I, high precision numerical control boring and milling machine is utilized to measure the half of plane width size on the distance H of the upper plane that 120 ° of cylindrical shell inner circle center of circle O have processed to technique block and technique block
.
Ⅱ、h2=H-h1
Ⅲ、h1=
×tan30°
Ⅳ、
Thus, with the intersection point O1 of U datum line and W datum line for feed initial point (i.e. the origin of coordinates of machine tool), cutting-tool angle milling head is at the orientation rotation 30 ° perpendicular to platen, just can obtain by the feed vector T(a of feed initial point O1 to 120 ° of cylindrical shell faying faces), realize the tool setting to 120 ° of cylindrical shell faying faces and processing.
Finally, the Distance geometry depth of parallelism between the 120 ° of cylindrical shell faying faces (i.e. the longitudinal flange faying face of 120 ° of cylindrical shell both sides) processed with survey tool measurement and technique block two inclined-plane, angle between the two basic change face determining the 120 ° of cylindrical shell both sides processed is the accuracy of 120 °, note the inner circle chord length size measuring faying face place simultaneously, ensure the chord length consistent size of three lobes, 120 ° of cylindrical shell longitudinal flange faying faces, inconsistency is revised.
Treat three lobes, 120 ° of cylindrical shell longitudinal flange faying face completion of processing, by downward for three lobes, 120 ° of body end surface, bore, expand each rough hole on longitudinal flange faying face, chamfering, draw and put down, and with raw process bolt connection piece by three lobe cylindrical shells between two tightly, require to check longitudinal flange faying face gap uniformity, inside and outside circle aligns, and horizontal datum aligns.Bore, cut with scissors each refining hole, and with process for refining bolt tight.Be benchmark by full circle body end surface again, full circle cylindrical shell is paved, levels up.Support endoporus, by the upper and lower centering of cylindrical shell bonding crack, and take into account upper and lower symmetrical 8 centerings of cylindrical shell cylindrical, by full circle cylindrical shell end flanges in conjunction with upper thread centering level, deviation is less than 1mm, then goes up end flanges cylindrical and the end face of large-size numerical control machine processing full circle cylindrical shell.Last drilling pipe body end flanges connection holes and shell liner hole, complete the manufacture of full circle cylindrical shell.See Fig. 1.
Claims (1)
1. a processing method for large-sized grinder three lobe cylindrical shell faying face, is characterized in that: comprise the steps:
(1), by 120 ° of cylindrical shells by being fixed on the workbench of Digit Control Machine Tool after cylindrical shell inner circle centering;
(2) welding procedure block in the barrel support, in 120 ° of cylindrical shells, for the auxiliary base as 120 ° of cylindrical shell faying face processing;
(3), in Digit Control Machine Tool X-Z coordinate system, according to the inner circle radius of 120 ° of cylindrical shells and the inner circle chord length at 120 ° of cylindrical shell faying face places, the center of circle O of three datum lines V, U, W and 120 ° of cylindrical shell inner circles is determined; Described V datum line is the straight line at inner circle chord length place, 120 ° of cylindrical shell faying face places, and this straight line parallel is in numerically controlled machine; U datum line is the vertical center line of 120 ° of cylindrical shell faying face place inner circle chord lengths; W datum line is one and becomes 120 ° of angles with U datum line, and is parallel to the straight line of 120 ° of cylindrical shell faying faces;
(4), process the two sides of technique block according to U datum line, and ensure that the two sides of technique block are relative to U datum line centering; The upper plane of technique block is processed according to V datum line; Process two inclined-planes of technique block according to W datum line, and ensure that two inclined-planes of technique block are 120 ° of angles;
(5), with the intersection point O1 of U datum line and W datum line for feed initial point, calculate the vertical range a of two inclined-planes to 120 ° of cylindrical shell faying faces of technique block, thus obtain the feed vector of feed initial point O1 to 120 ° of cylindrical shell faying faces, and then process 120 ° of cylindrical shell faying faces.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510759129.5A CN105328398B (en) | 2015-11-10 | 2015-11-10 | A kind of processing method of the valve cylinder faying face of large-sized grinder three |
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| CN201510759129.5A CN105328398B (en) | 2015-11-10 | 2015-11-10 | A kind of processing method of the valve cylinder faying face of large-sized grinder three |
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| CN105328398A true CN105328398A (en) | 2016-02-17 |
| CN105328398B CN105328398B (en) | 2017-09-26 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109746495A (en) * | 2019-03-18 | 2019-05-14 | 哈尔滨电机厂有限责任公司 | A kind of process of pintongs seat ring single-lobe processing centering |
| CN109909679A (en) * | 2019-04-16 | 2019-06-21 | 哈尔滨电机厂有限责任公司 | A kind of raising divides valve seat ring Aperture precision method |
| CN112935727A (en) * | 2021-02-05 | 2021-06-11 | 一重集团(黑龙江)重工有限公司 | Split type lower ring machining method |
| CN113634993A (en) * | 2021-08-13 | 2021-11-12 | 中铁科工集团轨道交通装备有限公司 | Large-diameter split shield body machining method |
| CN115283948A (en) * | 2022-08-25 | 2022-11-04 | 共享铸钢有限公司 | Control method for preventing combined machining deformation of annular split castings |
| CN115741237A (en) * | 2022-11-10 | 2023-03-07 | 中国航发沈阳黎明航空发动机有限责任公司 | Automatic alignment method for machining split case joint surface |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2603457A (en) * | 1948-11-18 | 1952-07-15 | Armstrong Cork Co | Multijet heat exchange roll |
| US2848198A (en) * | 1957-01-28 | 1958-08-19 | Gen Am Transport | Fluid joint and processed material discharge assembly for rotary processing vessels |
| US3196938A (en) * | 1961-11-06 | 1965-07-27 | Gen Am Transport | Material processing vessels of the rotary type |
| CN1486808A (en) * | 2002-09-30 | 2004-04-07 | 华新水泥股份有限公司机械工程分公司 | In-situ turning process for large mill barrel and barrel clamping and regulating apparatus |
| CN102335807A (en) * | 2010-07-22 | 2012-02-01 | 中国有色（沈阳）冶金机械有限公司 | Auxiliary alignment method for cylinder processing |
-
2015
- 2015-11-10 CN CN201510759129.5A patent/CN105328398B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2603457A (en) * | 1948-11-18 | 1952-07-15 | Armstrong Cork Co | Multijet heat exchange roll |
| US2848198A (en) * | 1957-01-28 | 1958-08-19 | Gen Am Transport | Fluid joint and processed material discharge assembly for rotary processing vessels |
| US3196938A (en) * | 1961-11-06 | 1965-07-27 | Gen Am Transport | Material processing vessels of the rotary type |
| CN1486808A (en) * | 2002-09-30 | 2004-04-07 | 华新水泥股份有限公司机械工程分公司 | In-situ turning process for large mill barrel and barrel clamping and regulating apparatus |
| CN102335807A (en) * | 2010-07-22 | 2012-02-01 | 中国有色（沈阳）冶金机械有限公司 | Auxiliary alignment method for cylinder processing |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109746495A (en) * | 2019-03-18 | 2019-05-14 | 哈尔滨电机厂有限责任公司 | A kind of process of pintongs seat ring single-lobe processing centering |
| CN109746495B (en) * | 2019-03-18 | 2020-04-14 | 哈尔滨电机厂有限责任公司 | Four-petal seat ring single-petal machining alignment process method |
| CN109909679A (en) * | 2019-04-16 | 2019-06-21 | 哈尔滨电机厂有限责任公司 | A kind of raising divides valve seat ring Aperture precision method |
| CN112935727A (en) * | 2021-02-05 | 2021-06-11 | 一重集团(黑龙江)重工有限公司 | Split type lower ring machining method |
| CN113634993A (en) * | 2021-08-13 | 2021-11-12 | 中铁科工集团轨道交通装备有限公司 | Large-diameter split shield body machining method |
| CN115283948A (en) * | 2022-08-25 | 2022-11-04 | 共享铸钢有限公司 | Control method for preventing combined machining deformation of annular split castings |
| CN115741237A (en) * | 2022-11-10 | 2023-03-07 | 中国航发沈阳黎明航空发动机有限责任公司 | Automatic alignment method for machining split case joint surface |
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