CN109909694B - Method for processing flange sealing surface of end part of multi-section tower type container by using boring mill - Google Patents

Method for processing flange sealing surface of end part of multi-section tower type container by using boring mill Download PDF

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Publication number
CN109909694B
CN109909694B CN201910342324.6A CN201910342324A CN109909694B CN 109909694 B CN109909694 B CN 109909694B CN 201910342324 A CN201910342324 A CN 201910342324A CN 109909694 B CN109909694 B CN 109909694B
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China
Prior art keywords
tower
flange sealing
grinding wheel
diamond grinding
sealing
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CN201910342324.6A
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CN109909694A (en
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梁显军
赵庆立
高峰
翟跃光
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Shenyang Orient Titanium Industry Co ltd
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Shenyang Orient Titanium Industry Co ltd
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Abstract

A method for processing flange sealing surfaces at the end parts of a multi-section tower type container by using a boring machine belongs to the technical field of pressure container manufacturing and solves the problem that the boring machine in the prior art does not have the capability of precisely processing flange sealing surfaces at two ends of large-size tower type equipment, and is characterized by comprising the steps of clamping and aligning a tower section, roughly processing the flange sealing surfaces of the tower section by using a boring cutter and finely processing the flange sealing surfaces by using a diamond grinding wheel, wherein the steps are simple to install and convenient to operate, roughly processing the flange sealing surfaces at two ends of the tower section of the multi-section tower type container by using the same boring machine and simultaneously roughly processing the flange sealing surfaces by using the boring cutter and finely processing the flange sealing surfaces by using the diamond grinding wheel can be realized by using the boring cutter and the diamond grinding wheel through one-time clamping and aligning for 2 times, the rough processing and the finely processing of the flange sealing surfaces at two ends of the tower section of the multi-section tower type container on a numerical control boring machine, the production efficiency is improved.

Description

Method for processing flange sealing surface of end part of multi-section tower type container by using boring mill
Technical Field
The invention belongs to the technical field of pressure vessel manufacturing, and particularly relates to a method for processing a flange sealing surface of an end part of a multi-section tower type vessel by using a boring mill.
Background
The flange is an important part of a multi-section tower type container, the requirement on the surface roughness of the sealing surface of the flange end at the end part of the multi-section tower type container is high and is Ra0.8-1.6, in the prior art, a common grinding machine and a common lathe can realize the precise processing of a single flange sealing surface, but after the flange and a cylinder section are welded into the tower section, the length of each tower section is longer and is generally 4-6 meters, the diameter of the flange is larger and is generally more than 1 meter, the common grinding machine and the common lathe can not clamp, if a single part of the flange at the end part of the multi-section tower type container is processed by the conventional common lathe and the common grinding machine and then is welded with the cylinder section into a whole, the requirement on the final integral verticality after the assembly welding of a tower body can not be ensured, and the boring machine in the prior.
The invention with the application number of CN201610587602.0 discloses a flange sealing groove grinding device and a use method thereof, and the structure of the device comprises a positioning screw rod, a jackscrew, a bracket, a grinding ring handle and the like; the shape of the grinding ring is matched with the shape of a sealing groove of a workpiece to be machined of the pressure vessel, the grinding ring with a corresponding specification is selected, the device is fixed on the workpiece to be machined, the positioning screw rod is adjusted to enable the grinding ring to be in contact with the sealing groove of the workpiece to be machined, and grinding paste is added; the handle on the grinding ring is manually rotated to grind. The method adopts grinding of the flange sealing groove and manual rotary grinding, has high labor intensity and low efficiency, and can only realize the processing of the sealing groove of a single flange component.
Disclosure of Invention
The invention aims to solve the problem of overcoming the defects in the prior art and provides a method for processing the flange sealing surface of the end part of a multi-section tower type container by using a boring mill, which can ensure the final integral verticality requirement after the tower body is assembled and welded.
The technical scheme of the method for processing the flange at the end part of the multi-section tower type container by using the boring mill comprises the following steps:
step one, clamping and aligning the tower sections:
a fixed block is arranged in a dovetail groove on a workbench of the numerical control boring machine, short studs are arranged in the fixed block, the fixed block is connected with a fixed seat through the short studs at two ends and is connected with a bracket through the short stud in the middle, the upper surfaces of the fixed seats at the two ends are connected with a V-shaped upper clamping block and a V-shaped lower clamping block through long studs, the tower sections with end flanges welded at the two ends of the shell ring are arranged on a bracket in the middle, simultaneously, the tower section is clamped and aligned by the V-shaped upper clamping blocks and the V-shaped lower clamping blocks at the two ends, so that the axis of the tower section is parallel to the upper surface of the numerical control boring machine workbench, the flange sealing surfaces at the two ends of the tower section are vertical to the upper surface of the numerical control boring machine workbench, one end of the tower section is a right flange sealing surface, the other end of the tower section is a left flange sealing surface, the right flange sealing surface and the left flange sealing surface are parallel to each other, and the left end and the right end of the tower section are locked and fixed by long studs after the position of the tower section is adjusted;
step two, rough machining of the right flange sealing surface:
after the clamping and alignment of the tower sections are finished, a boring cutter is installed on a chuck of a spindle box of the numerical control boring machine; roughly machining a right flange sealing surface of a flange sealing surface at the end part of the tower section by using a boring cutter;
step three, replacing the diamond grinding wheel:
after rough machining is finished, after the surface roughness is checked to meet the requirement of finish machining, the boring cutter is disassembled, and a diamond grinding wheel is replaced on a chuck of a spindle box of the numerical control boring machine; the axis of the diamond grinding wheel connecting rod of the diamond grinding wheel is vertical to the sealing surface of the right flange of the tower section;
step four, finish machining the right flange sealing surface:
on the basis of roughly machining the right flange sealing surface, a diamond grinding wheel is used for finely machining the right flange sealing surface, so that the surface roughness of the right flange sealing surface reaches Ra0.8-1.6;
step five, roughly machining the left flange sealing surface:
the specific method is the same as the first step and the second step;
step six, finish machining the left flange sealing surface:
the specific method is the same as the third step and the fourth step.
And step three, step four and step six, the diamond grinding wheel comprises a diamond grinding wheel connecting rod, a threaded hole is processed in the center of the left end face of the diamond grinding wheel connecting rod, a bowl-shaped metal matrix is fixedly connected in the threaded hole through an inner hexagonal screw and a pressing block, and an annular diamond grinding head is mounted at the end part of the bowl-shaped metal matrix.
The diameter of the diamond grinding wheel connecting rod is the same as that of the boring cutter handle.
And the surface roughness of the right flange sealing surface and the left flange sealing surface in the fourth step and the sixth step is Ra 0.4.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention solves the problems that in the prior art, a multi-section tower type container has large diameter and long length, flange sealing surfaces at two ends of the multi-section tower type container are required to reach higher parallelism and surface roughness, a common lathe and a grinding machine cannot realize clamping, a common boring machine can realize clamping but cannot reach the required surface roughness, realizes rough machining and finish machining of the flange sealing surfaces at two ends of a tower section of the multi-section tower type container on a numerical control boring machine, the surface roughness reaches the requirement of Ra0.8-1.6, the actual measurement can reach the machining requirement of the surface roughness higher than Ra0.4, two machining methods of rough machining by using a boring cutter and finish machining by using a diamond grinding wheel can be simultaneously realized by one-time clamping and centering by using the same boring machine, equipment does not need to be shifted, two-step machining can be realized at one station only by replacing the boring cutter and the diamond grinding wheel, and the machining standard is ensured to be unchanged, accumulated errors caused by secondary clamping cannot be caused;
(2) the invention only needs to clamp twice to finish the finish machining of two end faces of the tower section, and ensures the perpendicularity of flange sealing faces at two ends of the tower section and the axis of the tower body, thereby ensuring the linearity and the sealing requirement of the whole tower body after the tower body consisting of a plurality of sections of tower sections is assembled;
(3) the invention has simple installation, convenient operation, low labor intensity, working hour cost saving and production efficiency improvement, and can be widely used for finish machining of the sealing surface of the tower section flange after assembly welding of various medium-pressure, high-pressure and ultrahigh-pressure vessels.
Drawings
Figure 1 is a schematic view of a roughing apparatus of the present invention,
figure 2 is a schematic view of a finishing assembly of the present invention,
figure 3 is a left side view of figure 1 or figure 2,
figure 4 is a schematic view of the construction of a diamond grinding wheel according to the invention,
figure 5 is a left side view of figure 4,
FIG. 6 is an assembled schematic view of a multi-section tower section of the present invention.
In the figure:
1. a numerical control boring machine is used for carrying out numerical control,
1-1, a working table,
1-2. a main spindle box of a numerical control boring machine,
2. a boring cutter is arranged on the upper portion of the cutter,
3. the tower section is provided with a tower section,
3-1, sealing surface of right flange,
3-2, sealing surface of left flange,
3-3, the cylindrical section is arranged in the cylindrical section,
4-1. a V-shaped upper clamping block,
4-2. a V-shaped lower clamping block,
5. a fixed seat is arranged on the base body,
6. the short stud is provided with a screw thread,
7. a fixed block is arranged on the upper surface of the bracket,
8. the bracket is provided with a plurality of brackets,
9. the long screw bolt is provided with a screw hole,
10. a diamond grinding wheel is arranged on the upper surface of the base,
10-1. connecting rod of diamond grinding wheel,
10-2, pressing the mixture into blocks,
10-3. a bowl-shaped metal matrix,
10-4. an inner hexagonal screw,
10-5, ring diamond grinding head.
Detailed Description
Detailed description of the preferred embodiment 1
The technical scheme of the method for processing the flange at the end part of the multi-section tower type container by using the boring mill comprises the following steps:
step one, clamping and aligning tower sections
As shown in figures 1 and 3, the invention firstly carries out clamping and alignment of the tower section, a fixed block 7 is arranged in a dovetail groove on a workbench 1-1 of a numerical control boring machine 1, a short stud 6 is arranged in the fixed block 7, the fixed block 5 is connected through the short studs 6 at two ends, a bracket 8 is connected through the short stud 6 in the middle, a V-shaped upper clamping block 4-1 and a V-shaped lower clamping block 4-2 are connected on the fixed blocks 5 at two ends through a long stud 9, the tower section with end flanges welded at two ends of the cylinder section 3-3 is fixed on the bracket 8 in the middle, the tower section is clamped and aligned through the V-shaped upper clamping block 4-1 and the V-shaped lower clamping block 4-2 at two ends, the axis of the tower section is parallel to the upper surface of the workbench 1-1 of the numerical control boring machine, and the sealing surfaces of the flanges at two ends of the tower section are vertical to the upper surface of the workbench 1-1 of, wherein, one end of the tower section is a right flange sealing surface 3-1, the other end is a left flange sealing surface 3-2, the right flange sealing surface 3-1 and the left flange sealing surface 3-2 are parallel to each other, and the left end and the right end are respectively locked and fixed by long studs 9 after the position is adjusted;
step two, roughly machining the right flange sealing surface 3-1:
after the clamping and alignment of the tower sections are finished, a boring cutter 2 consisting of a boring cutter handle and a boring cutter head is arranged on a chuck of a main spindle box 1-2 of the numerical control boring machine; the axis of the boring cutter handle of the boring cutter 2 is perpendicular to the right flange sealing surface 3-1 of the tower section, the right flange sealing surface 3-1 is roughly machined by the boring cutter 2, and the surface roughness of the sealing surface of the right flange sealing surface 3-1 meets the requirement of finish machining;
step three, replacing the diamond grinding wheel 10:
as shown in fig. 2 and 3, after rough machining is finished and the surface roughness is checked to meet the requirement of finish machining, the boring cutter 2 is detached, the diamond grinding wheel 10 is replaced on a chuck of a main spindle box 1-2 of the numerical control boring machine, and the axis of a diamond grinding wheel connecting rod of the diamond grinding wheel 10 is perpendicular to the right flange sealing surface 3-1 of the tower section;
step four, finish machining the right flange sealing surface 3-1:
on the basis of roughly machining the right flange sealing surface 3-1, finely machining the right flange sealing surface 3-1 by using a small feed amount of a diamond grinding wheel 10, so that the surface roughness of the right flange sealing surface 3-1 reaches the requirement of Ra0.8-1.6, wherein in one specific embodiment of the invention, the surface roughness reaches Ra0.4;
step five, roughly machining the left flange sealing surface 3-2:
the concrete method is the same as the step one and the step two,
step six, finish machining the left flange sealing surface 3-2:
the specific method is the same as the third step and the fourth step.
As shown in fig. 6, the sealing surfaces of the flanges at the end parts of other tower sections are processed according to the same method of the above steps, and finally the tower sections 3 are connected through the flanges, and the requirements of parallelism and surface roughness of the right flange sealing surface 3-1 and the left flange sealing surface 3-2 of each tower section 3 which are parallel to each other are ensured in the processing process, so that the integral straightness and sealing requirements of the tower body formed by the tower sections 3 are ensured.
Detailed description of the preferred embodiment 2
As shown in fig. 4 and 5, the diamond grinding wheel 10 in the third step, the fourth step and the sixth step comprises a diamond grinding wheel connecting rod 10-1, a threaded hole is processed in the center of the left end face of the diamond grinding wheel connecting rod 10-1, a bowl-shaped metal matrix 10-3 is fixedly connected in the threaded hole through an inner hexagonal screw 10-4 and a pressing block 10-2, and an annular diamond grinding head 10-5 is mounted at the end of the bowl-shaped metal matrix 10-3; in order to ensure the interchangeability of the diamond grinding wheel connecting rod 10-1 and the boring cutter handle, the diameter of the diamond grinding wheel connecting rod 10-1 is the same as the diameter of the ruler of the boring cutter handle.

Claims (4)

1. The method for processing the flange sealing surface of the end part of the multi-section tower type container by using the boring mill is characterized by comprising the following steps of:
step one, clamping and aligning the tower sections:
a fixed block (7) is arranged in a dovetail groove on a workbench (1-1) of the numerical control boring machine (1), short studs (6) are arranged in the fixed block (7), fixing seats (5) are connected through the short studs (6) at two ends, a bracket (8) is connected through the middle short stud (6), V-shaped upper clamping blocks (4-1) and V-shaped lower clamping blocks (4-2) are connected on the fixing seats (5) at two ends through long studs (9), tower sections with end flanges welded at two ends of the tower sections (3-3) are placed on the bracket (8) in the middle, the tower sections are clamped and aligned through the V-shaped upper clamping blocks (4-1) and the V-shaped lower clamping blocks (4-2) at two ends, the axis of the tower sections is parallel to the upper surface of the workbench (1-1) of the numerical control boring machine, the flange sealing surfaces at two ends of the tower sections are perpendicular to the upper surface of the workbench (1-1) of the numerical control boring machine, one end of the tower section is a right flange sealing surface (3-1), the other end of the tower section is a left flange sealing surface (3-2), the right flange sealing surface (3-1) and the left flange sealing surface (3-2) are parallel to each other, and the left end and the right end of the tower section are locked and fixed by long studs (9) respectively after the position of the tower section is adjusted;
step two, roughly machining a right flange sealing surface (3-1):
after the clamping and alignment of the tower sections are finished, a boring cutter (2) is installed on a chuck of a main spindle box (1-2) of the numerical control boring machine; roughly machining a right flange sealing surface (3-1) of the flange sealing surface at the end part of the tower section by using a boring cutter (2);
step three, replacing the diamond grinding wheel (10):
after rough machining is finished, after the surface roughness is checked to meet the requirement of finish machining, the boring cutter (2) is disassembled, and the diamond grinding wheel (10) is replaced on a chuck of a main spindle box (1-2) of the numerical control boring machine; the axis of the diamond grinding wheel connecting rod of the diamond grinding wheel (10) is vertical to the right flange sealing surface (3-1) of the tower section;
step four, finish machining the right flange sealing surface (3-1):
on the basis of roughly machining the right flange sealing surface (3-1), finely machining the right flange sealing surface (3-1) by using a diamond grinding wheel (10) to ensure that the surface roughness of the right flange sealing surface (3-1) reaches 0.8-1.6 microns;
step five, roughly machining a left flange sealing surface (3-2):
the specific method is the same as the first step and the second step;
step six, finish machining the left flange sealing surface (3-2):
the specific method is the same as the third step and the fourth step.
2. The method for processing the sealing surface of the flange at the end part of the multi-section tower-type container by using the boring mill as claimed in claim 1, wherein the diamond grinding wheel (10) in the third step, the fourth step and the sixth step comprises a diamond grinding wheel connecting rod (10-1), a threaded hole is processed in the center of the left end surface of the diamond grinding wheel connecting rod (10-1), a bowl-shaped metal matrix (10-3) is fixedly connected in the threaded hole through an inner hexagonal screw (10-4) and a pressing block (10-2), and an annular diamond grinding head (10-5) is installed at the end part of the bowl-shaped metal matrix (10-3).
3. The method for processing the sealing surface of the flange at the end part of the multi-section tower type container by using the boring mill as claimed in claim 2, wherein the diameter of the diamond grinding wheel connecting rod (10-1) is the same as that of the boring mill handle.
4. The method for processing the flange sealing surface of the end part of the multi-joint tower type container by using the boring mill as claimed in claim 1, wherein the surface roughness of the right flange sealing surface (3-1) and the left flange sealing surface (3-2) in the fourth step and the sixth step is 0.4 μm.
CN201910342324.6A 2019-04-26 2019-04-26 Method for processing flange sealing surface of end part of multi-section tower type container by using boring mill Active CN109909694B (en)

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CN109909694B true CN109909694B (en) 2020-12-29

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110561329B (en) * 2019-08-30 2021-07-02 北京星航机电装备有限公司 Rapid assembly method of large flange beam structure assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930301A (en) * 1972-03-17 1976-01-06 Schiess Aktiengesellschaft Heavy machine tool and device for depositing and placing a tool head in readiness for use
CN202144019U (en) * 2011-05-24 2012-02-15 龙工(上海)液压有限公司 Tool clamp for boring holes and milling surface for piston rod
CN202240452U (en) * 2011-09-08 2012-05-30 福建鼎川机床有限公司 Boring mill of numerical control vehicle for brake valve sealing surface
CN202763660U (en) * 2012-08-30 2013-03-06 欧达宜昌机电设备制造有限公司 Right-angle grinding head of numerical-control boring and milling machine
CN203356647U (en) * 2013-05-14 2013-12-25 沈阳北方特种机床设计院有限公司 Valve boring lathe machine tool
CN203843549U (en) * 2014-04-30 2014-09-24 重庆康汇动力科技发展有限公司 Shaft hole boring tool

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930301A (en) * 1972-03-17 1976-01-06 Schiess Aktiengesellschaft Heavy machine tool and device for depositing and placing a tool head in readiness for use
CN202144019U (en) * 2011-05-24 2012-02-15 龙工(上海)液压有限公司 Tool clamp for boring holes and milling surface for piston rod
CN202240452U (en) * 2011-09-08 2012-05-30 福建鼎川机床有限公司 Boring mill of numerical control vehicle for brake valve sealing surface
CN202763660U (en) * 2012-08-30 2013-03-06 欧达宜昌机电设备制造有限公司 Right-angle grinding head of numerical-control boring and milling machine
CN203356647U (en) * 2013-05-14 2013-12-25 沈阳北方特种机床设计院有限公司 Valve boring lathe machine tool
CN203843549U (en) * 2014-04-30 2014-09-24 重庆康汇动力科技发展有限公司 Shaft hole boring tool

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