CN114227149A - High-precision machining tool and machining method for titanium alloy hemispherical assembly and welding piece - Google Patents
High-precision machining tool and machining method for titanium alloy hemispherical assembly and welding piece Download PDFInfo
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- CN114227149A CN114227149A CN202111375681.6A CN202111375681A CN114227149A CN 114227149 A CN114227149 A CN 114227149A CN 202111375681 A CN202111375681 A CN 202111375681A CN 114227149 A CN114227149 A CN 114227149A
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- 238000003754 machining Methods 0.000 title claims abstract description 109
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000003466 welding Methods 0.000 title claims description 82
- 238000012545 processing Methods 0.000 claims abstract description 24
- 238000003825 pressing Methods 0.000 claims description 22
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000003801 milling Methods 0.000 claims description 7
- 238000003672 processing method Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
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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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- 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
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/02—Machine tools for performing different machining operations
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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
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
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Abstract
The invention discloses a high-precision machining tool for a titanium alloy hemispherical assembly and a machining method thereof, wherein the high-precision machining tool comprises a base and a plurality of supporting seats, the supporting seats are arranged on the base and distributed around the center of the base, arc-shaped notches are formed on one sides of the supporting seats close to the center of the base, an accommodating space for placing the hemispherical assembly is formed by the arc-shaped notches of all the supporting seats, a plurality of groups of supporting and adjusting bolts are distributed on an arc-shaped surface at the arc-shaped notches, the supporting and adjusting bolts are arranged along the length direction of the arc-shaped surface, and the outer ends of the supporting and adjusting bolts are in contact with the hemispherical assembly so as to adjust the space pose state of the hemispherical assembly to the position of a machining coordinate system. The scheme aims at the processing design of the large-specification titanium alloy hemispherical assembly weldment, reasonably arranges the processing sequence, specially designs the processing tool, and solves the processing problem of the large-specification high-precision titanium alloy hemispherical assembly weldment.
Description
Technical Field
The invention belongs to the technical field of machining of metal structural parts, and particularly relates to a high-precision machining tool and a machining method for a titanium alloy hemispherical assembly and welding part.
Background
In order to bear huge seawater pressure, the deep-sea manned cabin usually adopts light-weight and high-strength titanium alloy as a main material, generally adopts a spherical structure, and is usually manufactured into a whole spherical structure by adopting a mode of welding two hemispherical assemblies. Because manned cabin size is great, and the diameter can reach 2m, and whole blank weight reaches 3.5t, and is very strict to whole true sphericity, control system interface and watertight hatch department dimensional accuracy, and titanium alloy's own gluing sword nature and the intensity of gigapascal level cause very big degree of difficulty to its machine tooling, must guarantee on the one hand can be stable when processing interior sphere to be fixed on the lathe platform, on the other hand needs to guarantee the precision of its every size. Because the structures such as the hole seat for welding on the hemisphere and the connector can be integrally processed only in a milling mode, compared with a turning mode, the precision control and the processing parameters are more complex, the processing allowance of partial positions is only 2mm, and the leveling and aligning reference difficulty is very high.
The prior art discloses a high-precision machining method for a titanium alloy spherical shell, but a machining object is a pure sphere, no welding component is provided, a turning mode can be used, and the method is not suitable for welding a hemispherical component in the project. Besides, in the literature and patent technology search, no relevant research report has been found by the predecessor on the processing method and tool of the titanium alloy hemispherical assembly and welding piece.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a high-precision machining tool for a titanium alloy hemispherical assembly and a machining method thereof.
One of the purposes of the invention is to provide a high-precision machining tool for a titanium alloy hemispherical assembly, which comprises a base and a plurality of supporting seats, wherein the supporting seats are arranged on the base and distributed around the center of the base, arc-shaped notches are formed on one sides of the supporting seats close to the center of the base, an accommodating space for placing the hemispherical assembly is formed by the arc-shaped notches of all the supporting seats, a plurality of groups of supporting and adjusting bolts are distributed on an arc-shaped surface at the arc-shaped notches, the supporting and adjusting bolts are arranged along the length direction of the arc-shaped surface, and the outer ends of the supporting and adjusting bolts are in contact with the hemispherical assembly so as to adjust the space pose state of the hemispherical assembly to the position of a machining coordinate system.
Preferably, the base comprises an annular seat and a central seat, the annular seat is used for installing the supporting seat, and the central seat is arranged at the center of the annular seat and used for supporting the bottom of the hemispherical assembly welding piece.
Preferably, a spherical groove is formed on an upper end surface of the center seat.
As preferred scheme, the supporting seat includes a backup pad, two bed plates and two reinforcing plates, the up end of backup pad perpendicular to annular seat, the bed plate sets up in the lower edge both sides of backup pad and rather than perpendicular, has seted up the screw on the bed plate for pass through bolt fixed connection with annular seat, the reinforcing plate is vertical to be set up, and the symmetry sets up in the both sides of backup pad.
Preferably, the supporting and adjusting bolt comprises an adjusting screw and a locking nut, a threaded hole is formed in the arc-shaped surface, a screw rod of the adjusting screw is screwed into the threaded hole in the arc-shaped surface, and the locking nut is arranged on the adjusting screw in a penetrating mode so as to achieve locking or loosening adjustment of the adjusting screw.
As preferred scheme, be provided with the rings that are used for hoist and mount processing frock on the annular seat between the adjacent supporting seat.
As the preferred scheme, the inboard of rings is provided with the bar hole, the length direction in bar hole sets up along annular seat radial direction.
The invention also aims to provide a high-precision machining method of the titanium alloy hemispherical assembly and welding piece, which is obtained by firstly roughly machining the inner spherical surface of the hemispherical assembly and welding piece, then roughly machining and finely machining the outer spherical surface of the hemispherical assembly and welding piece in sequence, then detecting the size of the outer spherical surface through three coordinates, finely adjusting a coordinate system according to a detection result and finally finely machining the inner spherical surface of the hemispherical assembly and welding piece.
Preferably, the high-precision machining method of the hemispherical assembly and welding piece is as follows:
step one, welding pressing plates with the same number as the supporting seats on the outer edge of a hemispherical equatorial plane of a hemispherical assembly welding piece, wherein the pressing plates are respectively in one-to-one correspondence with the positions of the supporting seats;
step two, milling a datum hole on the pressing plate;
step three, three-dimensional laser scanning is carried out on the semi-spherical assembly welding piece to generate an entity, and a machining coordinate system and machining allowance of each part are determined through comparison with a machining model of the entity;
placing the hemispherical assembly and welding piece on a machining tool, enabling the inner spherical surface of the hemispherical assembly and welding piece to face upwards, adjusting the position of the hemispherical assembly and welding piece by using a supporting adjusting bolt and a horizontal adjusting bolt, adjusting the position to a machining coordinate system, fastening a pressing plate welded on the equatorial plane of a hemisphere by using a bolt, roughly machining the inner spherical surface by using a numerical control gantry type three-axis machine tool, and after a machining program is finished, remaining 2mm machining allowance on the inner spherical surface;
turning the hemispherical assembly and welding part, enabling the outer spherical surface to face upwards, and performing rough machining on the outer spherical surface by adopting a numerical control gantry type three-axis machine tool, wherein the machining allowance of 2mm remains on the outer spherical surface;
sixthly, performing semi-finishing on the outer spherical surface on a numerical control gantry type five-axis machine tool, wherein a machining allowance of 0.5mm remains on the outer spherical surface;
seventhly, performing finish machining on the outer spherical surface on a numerical control gantry type five-axis machine tool, and machining to the required size;
step eight, checking the size of the outer spherical surface on the three coordinates, measuring the radius and the position of the spherical center of the outer spherical surface, and finely adjusting the coordinate system according to the actual measurement result;
placing the hemispherical assembly and welding piece on a machining tool, determining machining coordinates according to the coordinate system adjusted in the step seven, performing semi-finishing on the inner spherical surface on a gantry type five-axis machine tool, and remaining machining allowance of 0.5mm on the inner spherical surface;
step ten, performing fine machining on the inner spherical surface on a gantry type five-axis machine tool, and machining to the required size;
and step eleven, milling the equatorial plane, and machining and removing the pressing plate welded by the hemispherical assembly and welding piece.
Preferably, the processing parameters in the seventh step and the tenth step are as follows: the main shaft rotating speed is 1200r/min, the cutting speed is 1000mm/min, the cutting depth is 0.5mm, and the feed rate is 0.2 mm.
Advantageous effects
Firstly, the invention designs a special processing tool through improvement, obviously improves the reference adjustment precision and the processing precision, and solves the processing problem of large-size high-precision titanium alloy hemispherical assembly and welding pieces. The inner side of the hemispherical assembly and welding piece is placed upwards in the containing cavity of the machining tool, the inner spherical surface of the hemispherical assembly and welding piece faces upwards, the outer spherical surface of the hemispherical assembly and welding piece can be in contact with the supporting and adjusting bolt, the supporting and adjusting bolt can adjust the space pose state of the hemispherical assembly and welding piece in different directions and adjust the space pose state of the hemispherical assembly and welding piece to the position of a machining coordinate system, the machining size and precision are guaranteed, after the position of the hemispherical assembly and welding piece is adjusted, the pressing plate is fixedly connected with the upper end of the supporting seat, and the hemispherical assembly and welding piece is positioned.
The processing method of the scheme adopts the matching of the gantry three-axis machine tool and the gantry five-axis machine tool with high-precision heavy cutting force to process, optimizes the processing sequence, adopts the processing sequence of inner spherical surface rough machining, outer spherical surface finish machining, outer spherical surface three-coordinate detection and inner spherical surface finish machining, effectively ensures the overall dimensional precision of the hemispherical assembly and welding part, is combined with the special processing tool, ensures that the radial dimensional tolerance of the inner spherical surface and the outer spherical surface can reach +/-0.3 mm, the true sphericity can reach 0.2mm, the roughness can reach 3.2Ra, and the local roughness can reach 0.8 Ra.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a perspective view of the tooling of the present invention;
FIG. 2 is a top view of the tooling of the present invention;
FIG. 3 is a perspective view of a hemispherical weldment of the present invention;
FIG. 4 is a top view of a hemispherical weldment of the present invention;
FIG. 5 is a first drawing illustrating a first state of the hemispherical weldment of the present invention;
FIG. 6 is a second drawing illustrating the processing status of the hemispherical weldment of the present invention;
FIG. 7 is a view showing the construction of a support adjusting bolt according to the present invention;
the labels in the figure are: 1. the device comprises a supporting seat, 11, a supporting plate, 111, horizontal screw holes, 112, fastening holes, 12, a base plate, 13, a reinforcing plate, 2, supporting adjusting bolts, 21, adjusting screws, 22, locking nuts, 3, annular seats, 4, center seats, 5, lifting rings, 6, strip-shaped holes, 7, fastening bolts, 10, hemispherical assembling and welding pieces, 101, pressing plates, 102, hemispherical equatorial planes, 103 and reference holes.
Detailed Description
The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
It should be noted that: unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" and "an" or "the" and similar referents in the description and claims of the present invention are not to be construed as limiting in number, but rather as indicating the presence of at least one. The word "comprise" or "comprises", and the like, indicates that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, but does not exclude other elements or items having the same function.
As shown in fig. 1 and fig. 2, the embodiment provides a high-precision machining tool for a titanium alloy hemispherical assembly and welding piece, which comprises a base, wherein the base comprises an annular seat 3 and a central seat 4, the upper part of the annular seat 3 is used for installing a supporting seat 1, the central seat 4 is arranged in the center of the annular seat 3, and a spherical groove is formed in the upper end surface of the central seat 4 and is used for supporting the bottom of the hemispherical assembly and welding piece 10.
In this embodiment, supporting seat 1 includes a backup pad 11, two bed plates 12 and two reinforcing plates 13, backup pad 11 perpendicular to annular seat 3's up end, bed plate 12 sets up in backup pad 11's lower edge both sides and rather than perpendicular, has seted up screw 121 on bed plate 12 for pass through fastening bolt 7 fixed connection with annular seat 3, reinforcing plate 13 is vertical to be set up, and the symmetry sets up in backup pad 11's both sides, reinforcing plate 13 and bed plate 12, the equal mutually perpendicular of backup pad 11. The support plate 11 has fastening holes 112 formed in an upper end surface thereof for fixedly fastening the support base 1 and the pressing plate 101 by bolts corresponding to the reference holes 103.
This scheme, distribute around the base center and set up 5 supporting seats 1, one side that supporting seat 1 leaned on the base center is formed with the arc breach, the accommodation space that is used for placing hemisphere assembly and welding piece 10 is constituteed to the arc breach of 5 supporting seats 1, it has the multiunit to support adjusting bolt 2 to distribute at the arcwall face of arc breach department, support adjusting bolt 2 and arrange along the length direction of arcwall face, and the sphere center position of its axis direction equal directional hemisphere assembly and welding piece 10, the outer end nut that supports adjusting bolt 2 contacts with hemisphere assembly and welding piece 10, adjust with the space position appearance state of hemisphere assembly and welding piece 10, and adjust to the position of processing coordinate system.
This embodiment, support adjusting bolt 2 and include adjusting screw 21 and lock nut 22, be provided with the screw hole on the arcwall face of supporting seat 1, adjusting screw 21's lead screw is twisted in the screw hole on the arcwall face, lock nut 22 wears to establish on adjusting screw 21, in order to realize adjusting screw 21's locking or loosen the regulation, when the support position to adjusting screw 21 needs is adjusted, need loosen lock nut 22 earlier, rotate adjusting screw 21, make adjusting screw 21's nut part promote the position of hemisphere assembly and welding piece 10 and realize the fine setting, after the position adjustment of hemisphere assembly and welding piece 10 targets in place, carry out locking again fixedly to adjusting screw 21 through lock nut 22.
This scheme is provided with rings 5 that are used for the processing frock to hoist on the annular seat 3 between the adjacent supporting seat 1, and rings in this embodiment are provided with 5. The inboard of rings 5 is provided with bar hole 6, and the length direction in bar hole 6 sets up along 3 radial directions on annular seat, and bar hole 6 is used for the base to subtract heavy, rings 5 in this scheme and bar hole 6 center evenly distributed around annular seat 3 respectively.
In order to realize fine adjustment of the hemispherical assembly and welding piece 10 in the horizontal direction, 2 groups of horizontal adjusting bolts are arranged at the upper end of each supporting seat 1 in parallel, a horizontal screw hole 111 is formed at the upper end of the supporting plate 11 along the horizontal direction, the horizontal adjusting bolts are arranged in the horizontal screw hole 111 at the upper end of the supporting plate 11 in a penetrating manner to realize adjustment of the hemispherical assembly and welding piece 10 in the horizontal direction so as to be used for aligning a fastening hole 112, an opening on the pressing plate 101 and the fastening hole 112 are aligned to be fixed through the bolts, the horizontal adjusting bolt has the same adjusting principle as that of the supporting adjusting bolt 2 and comprises an adjusting screw rod and a locking nut, when the horizontal position of the hemispherical assembly and welding piece 10 needs to be adjusted finely, the locking nut needs to be loosened firstly, when the horizontal position of the hemispherical assembly and welding piece 10 is adjusted in place, the opening of the pressing plate 101 is superposed with the fastening hole 112 below, the locking nut is fastened, two horizontal screw holes 111 are arranged in parallel in each support plate 11, and adjustment is performed from different angles to prevent the adjustment position from deviating.
The working principle of the processing tool of the scheme is as follows: the hemispherical assembly and welding piece 10 is placed on a machining tool, the inner spherical surface faces upwards, the base and the supporting and adjusting bolt 2 play a supporting role for the hemispherical assembly and welding piece 10, the position of the hemisphere is finely adjusted by the supporting and adjusting bolt 2 and the horizontal adjusting bolt to a machining coordinate system position, and the pressing plate 101 welded on the hemispherical equatorial plane 102 is fastened by the bolt, so that rough machining and finish machining can be further performed by a machine tool.
The embodiment also provides a high-precision machining method for the titanium alloy hemispherical assembly and welding piece, which adopts the sequence of inner spherical surface rough machining, outer spherical surface finish machining, outer spherical surface three-coordinate detection and inner spherical surface machining, and effectively ensures the overall dimensional precision.
The method comprises the following specific steps: step 1, welding 5 pressing plates 101 at corresponding positions on the outer edge of a hemispherical equatorial plane 102 of a hemispherical assembly and welding piece 10, wherein the 5 pressing plates 101 respectively correspond to the positions of a supporting seat 1;
step 7, performing finish machining on the outer spherical surface on a numerical control gantry type five-axis machine tool, and machining to the size required by a drawing;
step 8, inspecting all sizes of the outer spherical surface of the hemispherical assembly and welding part 10 on a three-coordinate measuring machine, measuring the radius and the spherical center position of the hemispherical assembly and welding part, and finely adjusting a coordinate system according to an actual measurement result to ensure the precision of the final size and the uniformity of the wall thickness;
step 9, placing the hemispherical assembly and welding part 10 on a machining tool, determining machining coordinates by the coordinate system adjusted in the root step 8, performing spherical semi-finishing on a numerical control gantry five-axis machine tool, and remaining machining allowance of 0.5 mm;
and 11, milling the equatorial plane 102 of the hemisphere to ensure the flatness and roughness of the equatorial plane, and machining and removing the welded pressing plate 101.
Specifically, in the present embodiment, the material of the hemispherical assembly weldment 10 is Ti62A titanium alloy.
Specifically, the tool used in the machining of the hemispherical assembly and welding part 10 is an alloy tool, and the machining parameters in the steps 7 and 10 are as follows: the main shaft rotating speed is 1200r/min, the cutting speed is 1000mm/min, the cutting depth is 0.5mm, and the feed rate is 0.2 mm.
It should be noted that the processing method of the scheme can also be used for processing other assembly weldments of the same type.
By adopting the processing tool and the processing method, the radius dimensional tolerance of the inner spherical surface and the outer spherical surface can reach +/-0.3 mm, the true sphericity can reach 0.2mm, and the roughness can reach 3.2 Ra.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. High accuracy machine tooling frock of titanium alloy hemisphere assembly and welding spare, its characterized in that: including base and a plurality of supporting seat, the supporting seat sets up on the base to distribute around the base center and set up, one side that the supporting seat leaned on the base center is formed with the arc breach, and the arc breach of all supporting seats constitutes the accommodation space who is used for placing hemisphere assembly and welding piece, and it has the multiunit to support adjusting bolt to distribute at the arcwall face of arc breach department, supports adjusting bolt and arranges along the length direction of arcwall face, the outer end that supports adjusting bolt contacts with hemisphere assembly and welding piece to adjust the position to processing coordinate system to the space position appearance state of hemisphere assembly and welding piece.
2. The high-precision machining tool for the titanium alloy hemispherical assembly and welding part according to claim 1, characterized in that: the base includes annular seat and center seat, the annular seat is used for the erection bracing seat, the center seat sets up in annular seat center department to a bottom for supporting hemisphere assembly welding spare.
3. The high-precision machining tool for the titanium alloy hemispherical assembly and welding part as claimed in claim 2, characterized in that: and a spherical groove is formed on the upper end surface of the central seat.
4. The high-precision machining tool for the titanium alloy hemispherical assembly and welding part as claimed in claim 2, characterized in that: the supporting seat comprises a supporting plate, two base plates and two reinforcing plates, the supporting plate is perpendicular to the upper end face of the annular seat, the base plates are arranged on two sides of the lower edge of the supporting plate and perpendicular to the lower edge of the supporting plate, screw holes are formed in the base plates and used for being fixedly connected with the annular seat through bolts, the reinforcing plates are vertically arranged, and the reinforcing plates are symmetrically arranged on two sides of the supporting plate.
5. The high-precision machining tool for the titanium alloy hemispherical assembly and welding part according to claim 1, characterized in that: the supporting and adjusting bolt comprises an adjusting screw rod and a locking nut, a threaded hole is formed in the arc-shaped surface, a screw rod of the adjusting screw rod is screwed into the threaded hole in the arc-shaped surface, and the locking nut is arranged on the adjusting screw rod in a penetrating mode so as to achieve locking or loosening adjustment of the adjusting screw rod.
6. The high-precision machining tool for the titanium alloy hemispherical assembly and welding part as claimed in claim 2, characterized in that: and a lifting ring for lifting the processing tool is arranged on the annular seat between the adjacent supporting seats.
7. The high-precision machining tool for the titanium alloy hemispherical assembly and welding part as claimed in claim 6, characterized in that: the inboard of rings is provided with the bar hole, the length direction in bar hole sets up along annular seat radial direction.
8. The high-precision machining method of the titanium alloy semispherical assembly and welding piece is characterized by comprising the following steps of: the method comprises the steps of firstly roughly machining the inner spherical surface of a hemispherical assembly and welding piece, then roughly machining and finely machining the outer spherical surface of the hemispherical assembly and welding piece in sequence, then detecting the size of the outer spherical surface through three coordinates, finely adjusting a coordinate system according to a detection result, and finally finely machining the inner spherical surface of the hemispherical assembly and welding piece.
9. A high precision machining method of a titanium alloy semispherical assembly member according to claim 8, characterized in that: the specific processing method comprises the following steps:
step one, welding pressing plates with the same number as the supporting seats on the outer edge of a hemispherical equatorial plane of a hemispherical assembly welding piece, wherein the pressing plates are respectively in one-to-one correspondence with the positions of the supporting seats;
step two, milling a datum hole on the pressing plate;
step three, three-dimensional laser scanning is carried out on the semi-spherical assembly welding piece to generate an entity, and a machining coordinate system and machining allowance of each part are determined through comparison with a machining model of the entity;
placing the hemispherical assembly and welding piece on a machining tool, enabling the inner spherical surface of the hemispherical assembly and welding piece to face upwards, adjusting the position of the hemispherical assembly and welding piece by using a supporting adjusting bolt and a horizontal adjusting bolt, adjusting the position to a machining coordinate system, fastening a pressing plate welded on the equatorial plane of a hemisphere by using a bolt, roughly machining the inner spherical surface by using a numerical control gantry type three-axis machine tool, and after a machining program is finished, remaining 2mm machining allowance on the inner spherical surface;
turning the hemispherical assembly and welding part, enabling the outer spherical surface to face upwards, and performing rough machining on the outer spherical surface by adopting a numerical control gantry type three-axis machine tool, wherein the machining allowance of 2mm remains on the outer spherical surface;
sixthly, performing semi-finishing on the outer spherical surface on a numerical control gantry type five-axis machine tool, wherein a machining allowance of 0.5mm remains on the outer spherical surface;
seventhly, performing finish machining on the outer spherical surface on a numerical control gantry type five-axis machine tool, and machining to the required size;
step eight, checking the size of the outer spherical surface on the three coordinates, measuring the radius and the position of the spherical center of the outer spherical surface, and finely adjusting the coordinate system according to the actual measurement result;
placing the hemispherical assembly and welding piece on a machining tool, determining machining coordinates according to the coordinate system adjusted in the step seven, performing semi-finishing on the inner spherical surface on a gantry type five-axis machine tool, and remaining machining allowance of 0.5mm on the inner spherical surface;
step ten, performing fine machining on the inner spherical surface on a gantry type five-axis machine tool, and machining to the required size;
and step eleven, milling the equatorial plane, and machining and removing the pressing plate welded by the hemispherical assembly and welding piece.
10. The method for high precision machining of a titanium alloy hemispherical assembly weldment of claim 9 wherein: the processing parameters in the seventh step and the tenth step are as follows: the main shaft rotating speed is 1200r/min, the cutting speed is 1000mm/min, the cutting depth is 0.5mm, and the feed rate is 0.2 mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117047644A (en) * | 2023-10-13 | 2023-11-14 | 盐城市创众机械制造有限公司 | Spherical filter screen inner surface polishing equipment of slurry circulating pump |
| CN117428108A (en) * | 2023-12-11 | 2024-01-23 | 河南神州精工制造股份有限公司 | Integral stamping forming equipment and stamping forming method for large-diameter nickel alloy seal head |
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| CN107984175A (en) * | 2017-12-08 | 2018-05-04 | 中国航天科技集团公司长征机械厂 | A kind of processing method of ultra-thin titanium alloy spherical parts |
| CN209256380U (en) * | 2018-12-14 | 2019-08-16 | 西安优耐特容器制造有限公司 | A kind of boring clamping tooling of thin-wall titanium alloy end socket |
| CN111716066A (en) * | 2020-05-07 | 2020-09-29 | 沪东中华造船(集团)有限公司 | Ship pipe butt welding adjusting tool |
| CN112405044A (en) * | 2020-11-19 | 2021-02-26 | 首都航天机械有限公司 | Additional device of integral spinning type semi-spherical shell inner surface molding machine |
| CN113084560A (en) * | 2021-06-10 | 2021-07-09 | 四川航天长征装备制造有限公司 | Flexible supporting device for processing large thin-wall spherical part and reference alignment method |
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| CN214444171U (en) * | 2020-12-28 | 2021-10-22 | 天津宝涞精工集团股份有限公司 | Coaxial group of multilayer annular casing is to welding frock |
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| CN117047644A (en) * | 2023-10-13 | 2023-11-14 | 盐城市创众机械制造有限公司 | Spherical filter screen inner surface polishing equipment of slurry circulating pump |
| CN117047644B (en) * | 2023-10-13 | 2024-02-23 | 盐城市创众机械制造有限公司 | Spherical filter screen inner surface polishing equipment of slurry circulating pump |
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