CN110026741B - Rough machining method for centrifugal compressor shell - Google Patents
Rough machining method for centrifugal compressor shell Download PDFInfo
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- CN110026741B CN110026741B CN201910341165.8A CN201910341165A CN110026741B CN 110026741 B CN110026741 B CN 110026741B CN 201910341165 A CN201910341165 A CN 201910341165A CN 110026741 B CN110026741 B CN 110026741B
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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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention discloses a rough machining method of a centrifugal compressor shell, and belongs to the technical field of centrifugal compressors. The rough machining method of the centrifugal compressor shell comprises the following steps: hoisting a shell of the centrifugal compressor to a workbench of a boring machine, and supporting the shell; aligning inner holes of bearing areas at two ends of the shell to obtain the axis of the inner hole; adjusting the height of the machine shell to enable the axis of the inner hole to be parallel to the X axis of the boring machine; determining the Y-axis position of the boring machine; determining the X-axis position of the boring machine; and removing the allowance of the abdominal cavity of the shell in the Z-axis direction of the boring machine. The rough machining method of the centrifugal compressor shell is used for machining through the boring machine, so that the unit price in machining hours is reduced, and the cost is reduced.
Description
Technical Field
The invention relates to the technical field of centrifugal compressors, in particular to a rough machining method for a centrifugal compressor shell.
Background
In the existing method, a gantry mill is adopted to roughly machine a shell of a centrifugal compressor, the size of the shell is limited, the gantry mill with a worktable width larger than 4400mm, a length larger than 4100mm and a gantry height larger than 4550mm is required to machine, and the requirement of the size can be met only by adopting the existing 15-meter gantry mill in a factory. The rough machining of the shell is completed by utilizing a rough machining side milling head accessory of a 15-meter gantry mill and matching with a phi 630mm three-edge cutter head through axial and radial layered machining.
However, the structural form of the housing cavity and the material characteristics of the material are limited, the centrifugal compressor housing is processed by the gantry milling machine, the unit price per hour of 15 m gantry milling in our factory is about 1500 yuan per hour, and the processing cost is very high.
Therefore, the machining of the centrifugal compressor casing by the gantry mill is very expensive in terms of cost.
Disclosure of Invention
The invention provides a rough machining method of a centrifugal compressor shell, which solves or partially solves the technical problem that the cost is high when the centrifugal compressor shell is machined by a gantry mill in the prior art.
In order to solve the technical problem, the invention provides a rough machining method of a centrifugal compressor shell, which comprises the following steps: hoisting a shell of the centrifugal compressor to a workbench of a boring machine, and supporting the shell; aligning inner holes of bearing areas at two ends of the shell to obtain the axis of the inner hole; adjusting the height of the machine shell to enable the axis of the inner hole to be parallel to the X axis of the boring machine; determining the Y-axis position of the boring machine; determining the X-axis position of the boring machine; and removing the allowance of the abdominal cavity of the shell in the Z-axis direction of the boring machine.
Further, the hoisting of the shell of the centrifugal compressor to the worktable of the boring mill comprises the following steps: the casing is vertically lifted by the lifting rope penetrating through the abdominal cavity of the casing and the air inlet cylinder of the casing.
Further, the supporting the cabinet comprises the following steps; fixedly arranging a backup plate on the workbench, and enabling an air duct flange of the shell to lean against the backup plate; adjusting small iron is arranged on the lower portion of the outer side face of a mid-split flange of an air duct flange of the casing, and the casing is supported through the adjusting small iron; and a pressing structure is arranged at the wind cylinder flange of the casing and the hanging post of the casing to fix the casing.
Further, the step of fixedly arranging the backup plate on the workbench comprises the following steps: arranging the backup plate on a workbench; and fixedly connecting a first pressing plate with the workbench, wherein the edge of the backup plate is arranged between the first pressing plate and the workbench.
Further, the pressing mechanism includes: the second pressing plate, the screw, the upright post and the sliding block; the upright post is slidably arranged on the workbench through the sliding block; the connecting side of the second pressing plate is vertically connected with the upright post, and the pressing side of the second pressing plate faces towards the air duct flange of the casing and the hanging post of the casing; the pressing side of the second pressing plate can be in contact with an air duct flange of the casing and a hanging column of the casing; the screw rod penetrates through the second pressing plate and is in threaded connection with the workbench.
Furthermore, a sliding rail matched with the sliding block is arranged on the workbench.
Further, the determining the Y-axis position of the boring machine comprises the following steps: arranging the center on a main shaft of a boring machine; and the inner hole is centered through the center, and the position of the Y axis of the boring machine is determined.
Further, the step of classifying the inner hole by a tip comprises the following steps: contacting the tip with the highest position of the inner hole to obtain first height data A; contacting the tip with the lowest part of the inner hole to obtain second height data B; and obtaining third height data C by using the first height data A + the second height data B/2, wherein the third height data C is the position of the Y axis of the boring machine.
Further, the step of determining the X-axis position of the boring machine comprises the following steps: arranging a cutter head on a main shaft of a boring machine; and rotating the cutter head at a low speed to slightly scratch and rub the cutter head and the inner end surface of the inner hole, so that the position of the X axis of the boring machine can be determined.
Further, the cutter disc is a square shoulder milling cutter disc.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the shell of the centrifugal compressor is hoisted to a workbench of a boring machine and is supported, inner holes of bearing areas at two ends of the shell are aligned to obtain the axis of the inner hole, the height of the shell is adjusted to enable the axis of the inner hole to be parallel to the X axis of the boring machine, the Y axis position of the boring machine is determined, the X axis position of the boring machine is determined, the allowance of the abdominal cavity of the shell is removed in the Z axis direction of the boring machine, the abdominal cavity of the shell is roughly machined through the boring machine, the unit price in machining hours is reduced, and the cost is reduced.
Drawings
FIG. 1 is a schematic flow chart of a method for roughing a shell of a centrifugal compressor according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a centrifugal compressor casing according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1-2, a rough machining method for a centrifugal compressor casing according to an embodiment of the present invention includes the following steps:
step S1 is to hoist the casing 1 of the centrifugal compressor to the table 3 of the boring machine 2 and to support the casing 1.
Step S2, the inner holes 4 of the bearing areas at the two ends of the casing 1 are aligned to obtain the axis of the inner hole 4.
And step S3, adjusting the height of the machine shell 1 to enable the axis of the inner hole 3 to be parallel to the X axis of the boring machine 2.
And step S4, determining the Y-axis position of the boring machine.
And step S5, determining the X-axis position of the boring machine.
In step S6, the allowance of the abdominal cavity of the housing 1 is removed in the Z-axis direction of the boring machine.
Step S1 is described in detail.
Hoisting the shell 1 of the centrifugal compressor to the worktable 3 of the boring machine 2 comprises the following steps:
step S11, the casing 1 is vertically lifted by the lifting rope passing through the abdominal cavity of the casing 1 and the air inlet drum of the casing, and the casing 1 can be vertically placed on the workbench 3.
Supporting the cabinet 1 comprises the steps of:
step S12, the backup plate 5 is fixed on the workbench 3, and the wind duct flange of the casing 1 abuts against the backup plate 5.
Step S13, adjusting small iron 6 is arranged on the lower portion of the outer side face of the split flange in the wind barrel flange of the machine shell 1, and the machine shell 1 is supported through the adjusting small iron 6.
And step S14, arranging a pressing structure 7 at the wind cylinder flange of the casing 1 and the hanging post of the casing to fix the casing 1.
Step S12 is described in detail.
The step of fixedly arranging the backup plate 5 on the workbench 3 comprises the following steps:
in step S121, the backup plate 5 is set on the table 3.
Step S122, the first pressing plate is fixedly connected to the workbench 3, and the edge of the backup plate 5 is disposed between the first pressing plate and the workbench 3. Specifically, in the present embodiment, the first presser plate may be fixedly connected to the table 3 by bolts.
The first presser plate presses the bottom edge of the backup plate 5 against the table 3 to prevent play.
The structure of the pressing mechanism 7 will be described in detail.
The pressing mechanism 7 includes: a second press plate 7-1, a screw 7-2, a column 7-3 and a slide block.
The upright post 7-3 is slidably arranged on the workbench 3 through a slide block. A slide rail matched with the slide block is arranged on the workbench 3
The connecting side of the second pressing plate 7-1 is vertically and fixedly connected with the upright post 7-3. Specifically, in the present embodiment, the connection side of the second presser plate 7-1 may be fixedly connected perpendicularly to the pillar 7-3 by welding, and in other embodiments, the connection side of the second presser plate 7-1 may be fixedly connected perpendicularly to the pillar 7-3 by other means such as bolts or the like. The pressing side of the second pressing plate 7-1 faces the wind cylinder flange of the casing 1 and the hanging columns of the casing.
The pressing side of the second pressing plate 7-1 can be contacted with an air duct flange of the machine shell 1 and a hanging column of the machine shell 1.
The screw 7-2 passes through the second pressing plate 7-1 and is in threaded connection with the workbench 3.
Therefore, the upright post 7-3 slides on the workbench 3 through the slide block to drive the pressing side of the second pressing plate 7-1 to reach the wind cylinder flange of the casing 1 and the hanging post of the casing, the screw 7-2 penetrates through the second pressing plate 7-1 to be in threaded connection with the workbench 3, the position of the second pressing plate 7-1 is locked, and the casing 1 is pressed and fixed through the second pressing plate 7-1.
Step S2 is described in detail.
The inner holes 4 of the bearing areas at the two ends of the machine shell 1 are aligned through a dial indicator.
Step S4 is described in detail.
The method for determining the Y-axis position of the boring machine comprises the following steps:
and S41, detachably arranging the center on the main shaft of the boring machine.
And S42, centering the inner hole 4 through the center, and determining the Y-axis position of the boring machine.
Step S42 is described in detail.
The method for dividing the inner hole through the center comprises the following steps:
and S421, contacting the tip with the highest position of the inner hole to obtain first height data A.
And S422, contacting the tip with the lowest part of the inner hole to obtain second height data B.
And S423, obtaining third height data C by the first height data A + the second height data B/2, wherein the third height data C is the position of the Y axis of the boring machine.
Step S5 is described in detail.
The method for determining the X-axis position of the boring machine comprises the following steps:
in step S51, the cutter head is detachably attached to the spindle of the boring machine 2.
And step S52, the cutter head is rotated slowly, so that the cutter head and the inner end face of the inner hole 4 are slightly scraped, and the position of the X axis of the boring machine can be determined.
The portal mill uses a phi 630mm three-edge cutter head, but only small back cutting amount and side cutting amount can be obtained, the material removal efficiency is low, about 60 blades are arranged in one circle of the phi 630mm three-edge cutter head, due to the fact that materials are hard, the blades are damaged quickly, long time is needed for an operator to replace one circle of blades, and the machine tool is stopped for a long time. The cutter disc of this application is square shoulder milling cutter disc, further reduce cost.
Step S6 is described in detail.
The method for removing the allowance of the abdominal cavity of the shell 1 in the Z-axis direction of the boring machine specifically comprises the following steps:
and carrying out layered copying on the allowance in the abdominal cavity of the shell in the Z-axis direction of the boring machine, removing most of allowance in the abdominal cavity, and further reducing the cost through the layered copying.
In order to more clearly describe the embodiments of the present invention, the following description is made in terms of the method of using the embodiments of the present invention.
This application is to centrifugal compressor's stator part's processing field, and this stator part's form is casting stainless steel casing the latter half, and the outline volume is about 4097 4400 3000, and this casting stainless steel casing abdominal cavity through-flow part is the finish machining surface, and the casting allowance is between 100mm-200mm, abdominal cavity degree of depth 1550mm, and the casing material type is the cast steel spare, and the material trade mark is ZG06Cr13Ni4 Mo.
The casing 1 is vertically lifted by the lifting rope penetrating through the abdominal cavity of the casing 1 and the air inlet cylinder of the casing, and the casing 1 can be vertically placed on the workbench 3.
The backup plate 5 is fixedly arranged on the workbench 3, the air duct flange of the casing 1 leans against the backup plate 5, and the bottom edge of the backup plate 5 is pressed on the workbench 3 by the first pressing plate to prevent the play. Two adjusting small iron 6 are arranged on the lower portion of the outer side face of the middle section flange of the air duct flange of the casing 1, the casing 1 is supported through the adjusting small iron 6, and the height of the casing 1 is adjusted through extrusion or separation of the two adjusting small iron 6. The upright post 7-3 slides on the workbench 3 through the slide block to drive the pressing side of the second pressing plate 7-1 to reach an air duct flange of the casing 1 and a hanging post of the casing, the screw 7-2 penetrates through the second pressing plate 7-1 to be in threaded connection with the workbench 3, the position of the second pressing plate 7-1 is locked, and the casing 1 is pressed tightly through the second pressing plate 7-1 to be fixed. The pressing action of the second pressing plate 7-1 is carried out simultaneously with the height adjustment of the machine shell 1 by the adjusting iron 6.
And aligning the inner holes 4 of the bearing areas at the two ends of the shell 1 through a dial indicator to obtain the axis of the inner hole 4.
The height of the machine shell 1 is adjusted through the extrusion or separation of two adjusting small irons 6, so that the axis of the inner hole 3 is parallel to the X axis of the boring machine 2.
And mounting the tip on a main shaft of a boring machine. And contacting the tip with the highest part of the inner hole to obtain first height data A, contacting the tip with the lowest part of the inner hole to obtain second height data B, and obtaining third height data C by using the first height data A + the second height data B/2, wherein the third height data C is the position of the Y axis of the boring machine.
And (3) mounting the square shoulder milling cutter head on a main shaft of the boring machine 2. And rotating the cutter head slowly to slightly scrape and rub the cutter head and the inner end surface of the inner hole 4, so that the position of the X axis of the boring machine can be determined.
And carrying out layered copying on the allowance in the abdominal cavity of the shell in the Z-axis direction of the boring machine, removing most of allowance in the abdominal cavity, and further reducing the cost through the layered copying.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (8)
1. A rough machining method for a centrifugal compressor shell is characterized by comprising the following steps:
hoisting a shell of the centrifugal compressor to a workbench of a boring machine, and supporting the shell;
aligning inner holes of bearing areas at two ends of the shell to obtain the axis of the inner hole;
adjusting the height of the machine shell to enable the axis of the inner hole to be parallel to the X axis of the boring machine;
determining the Y-axis position of the boring machine;
determining the X-axis position of the boring machine;
removing the allowance of the abdominal cavity of the shell in the Z-axis direction of the boring machine;
the supporting the cabinet includes: a pressing structure is arranged at the wind cylinder flange of the casing and the hanging post of the casing to fix the casing; the hold-down mechanism includes: the second pressing plate, the screw, the upright post and the sliding block; the upright post is slidably arranged on the workbench through the sliding block; the connecting side of the second pressing plate is vertically connected with the upright post, and the pressing side of the second pressing plate faces towards the air duct flange of the casing and the hanging post of the casing; the pressing side of the second pressing plate can be in contact with an air duct flange of the casing and a hanging column of the casing; the screw penetrates through the second pressing plate and is in threaded connection with the workbench;
said supporting the chassis further comprises: two adjusting small irons are arranged on the lower portion of the outer side face of a split flange in an air duct flange of the casing, and the casing is supported through extrusion or separation of the two adjusting small irons so as to adjust the height of the casing; the pressing action of the second pressing plate and the height adjustment of the shell by the adjusting iron are simultaneously carried out;
the hoist and mount casing to the boring machine of centrifugal compressor includes on the workstation of boring machine: the casing is vertically lifted by a lifting rope penetrating through the abdominal cavity of the casing and the air inlet drum of the casing;
the removing the allowance of the abdominal cavity of the shell in the Z-axis direction of the boring machine comprises the following steps: and carrying out layered copying processing on the allowance in the abdominal cavity of the shell in the Z-axis direction of the boring mill, and removing most of the allowance in the abdominal cavity.
2. The roughing method for the casing of the centrifugal compressor according to claim 1, wherein said pressing structure is provided at the wind barrel flange of the casing and the hanging pillar of the casing, and before fixing the casing, said supporting the casing further comprises:
and fixedly arranging a backup plate on the workbench, and enabling an air duct flange of the shell to lean against the backup plate.
3. The roughing method of the centrifugal compressor casing according to claim 2, wherein said fixedly disposing the backup plate on said work table comprises the steps of:
arranging the backup plate on a workbench;
and fixedly connecting a first pressing plate with the workbench, wherein the edge of the backup plate is arranged between the first pressing plate and the workbench.
4. The roughing method of a centrifugal compressor casing according to claim 1, characterized in that:
the workbench is provided with a slide rail matched with the slide block.
5. The roughing method of a centrifugal compressor housing of claim 1 wherein said determining a boring machine Y axis position comprises the steps of:
arranging the center on a main shaft of a boring machine;
and the inner hole is centered through the center, and the position of the Y axis of the boring machine is determined.
6. The roughing method of said centrifugal compressor shell of claim 5, said dividing said inner bore by a point tip comprising the steps of:
contacting the tip with the highest position of the inner hole to obtain first height data A;
contacting the tip with the lowest part of the inner hole to obtain second height data B;
and obtaining third height data C by using the first height data A + the second height data B/2, wherein the third height data C is the position of the Y axis of the boring machine.
7. The roughing method of a centrifugal compressor housing of claim 1 wherein said determining a boring machine X-axis position comprises the steps of:
arranging a cutter head on a main shaft of a boring machine;
and rotating the cutter head at a low speed to slightly scratch and rub the cutter head and the inner end surface of the inner hole, so that the position of the X axis of the boring machine can be determined.
8. The roughing method of the centrifugal compressor casing according to claim 7, characterized in that:
the cutter head is a square shoulder milling cutter head.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910341165.8A CN110026741B (en) | 2019-04-25 | 2019-04-25 | Rough machining method for centrifugal compressor shell |
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| CN201910341165.8A CN110026741B (en) | 2019-04-25 | 2019-04-25 | Rough machining method for centrifugal compressor shell |
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| CN110026741B true CN110026741B (en) | 2021-06-22 |
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| CN114850791B (en) * | 2022-04-29 | 2023-05-26 | 沈阳鼓风机集团股份有限公司 | Machining method for special corner of large-sized hole body compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100652906B1 (en) * | 2005-05-19 | 2006-12-01 | 범창정밀(주) | Method for manufacturing a valve plate of compressor and a valve plate manufactured thereby |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103495752A (en) * | 2013-09-29 | 2014-01-08 | 上海中船三井造船柴油机有限公司 | Cutter and method for machining shaft head holes of machine frame |
| CN105729072A (en) * | 2016-04-29 | 2016-07-06 | 沈阳透平机械股份有限公司 | Machining method of machine case of ultra-heavy and ultra-large-size type compressor |
| CN107143525A (en) * | 2017-07-06 | 2017-09-08 | 沈阳鼓风机集团股份有限公司 | The manufacture method and compressor case of a kind of compressor case |
| CN107398574A (en) * | 2017-08-28 | 2017-11-28 | 沈阳鼓风机集团申蓝机械有限公司 | A kind of air compressor thin-walled fuselage anti-deformation processing technology |
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