CN116352378A - High-precision machining method for external installation reference guide shell - Google Patents
High-precision machining method for external installation reference guide shell Download PDFInfo
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- CN116352378A CN116352378A CN202310117935.7A CN202310117935A CN116352378A CN 116352378 A CN116352378 A CN 116352378A CN 202310117935 A CN202310117935 A CN 202310117935A CN 116352378 A CN116352378 A CN 116352378A
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- inner hole
- shell
- face
- steps
- rib plate
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- 238000003754 machining Methods 0.000 title claims abstract description 30
- 238000009434 installation Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims description 26
- 238000012545 processing Methods 0.000 claims abstract description 38
- 238000012937 correction Methods 0.000 claims abstract description 31
- 238000013461 design Methods 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 238000005520 cutting process Methods 0.000 claims description 16
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 238000003801 milling Methods 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 4
- 238000010892 electric spark Methods 0.000 claims description 3
- 238000003672 processing method Methods 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
Abstract
The invention provides a high-precision processing method of an externally-installed reference guide shell, which comprises the following steps: boring a bottom plane of the rib plate to ensure that the flatness reaches the standard; the bottom surface of the rib plate is used as a reference, and the first end surface of the shell, the inner hole correction belt and the side surface of the rib plate are processed, so that the accuracy reaches the standard; the first end face, the rib plate side face and the inner hole correction belt are used as references, and the vertical lathe is used for machining the inner hole of the shell, the second end face of the shell and the outer circle of the flange; turning the outer circle of the inner sleeve until the precision reaches the standard, leaving allowance in the inner hole and leaving allowance in the end face of one end; cold pressing the inner sleeve into the shell, wherein two ends of the inner sleeve extend out of two ends of the shell; processing an inner hole of the inner sleeve to ensure that the inner hole reaches design precision; processing an inner sleeve key groove; the processing of the external installation reference guide shell is realized through the steps. By adopting the above steps, the accuracy of the machining reference and the external mounting reference can be ensured. Particularly, the position relation between the inner hole and the rib plate is ensured, so that the installation position and the inner hole of the inner sleeve have enough relative position precision.
Description
Technical Field
The invention relates to the field of machine tool machining, in particular to a high-precision machining method for an externally installed reference guide shell.
Background
In the field of machining, the housing is generally provided with a mounting plane, which is parallel to the housing bore and has a certain height difference. The shell installation plane, the inner hole and the outer circle are processed mainly through boring machines, lathes and other processing equipment. When the shell is longer, the problem of poor straightness of an inner hole machined by the boring machine can occur, and as the main shaft is longer in overhanging, for example, when the main shaft exceeds 1 meter, the main shaft stretches out in a cantilever state, so that the deformation is larger, and the machining precision is difficult to meet the requirement due to the deformation. And the problem that the local hardness of the workpiece is different can cause spindle jitter, so that the size precision, straightness and surface finish of an inner hole can not meet the requirements. It is necessary to improve the processing efficiency while ensuring the processing accuracy.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-precision processing method for an externally-installed reference guide shell, which can solve the problems that the long shell is poor in dimensional precision, poor in straightness and poor in smoothness in the processing process.
In order to solve the technical problems, the technical scheme of the invention is as follows: a high-precision machining method for an externally installed reference guide shell comprises the following steps:
s1, checking the allowance of a shell blank;
s2, boring a bottom plane of the rib plate to ensure that the flatness reaches the standard;
s3, processing a first end face of the shell, an inner hole correction belt and a side face of the rib plate by taking the bottom face of the rib plate as a reference, so as to ensure that the precision reaches the standard;
s4, using the first end face, the rib plate side face and the inner hole correction belt as references, and processing the inner hole of the shell, the second end face of the shell and the outer circle of the flange by using a vertical lathe;
s5, turning the outer circle of the inner sleeve until the precision reaches the standard, and reserving a margin in an inner hole and a margin in one end face;
s6, cold-pressing the inner sleeve into the shell, wherein two ends of the inner sleeve extend out of two ends of the shell;
s7, processing an inner hole of the inner sleeve to enable the inner hole to reach design accuracy;
s8, processing an inner sleeve key slot;
the processing of the external installation reference guide shell is realized through the steps.
In a preferred embodiment, in step S2, the flatness is less than 0.03mm.
In the preferred scheme, in the step S3, the first end face of the shell ensures the perpendicularity with the bottom face of the rib plate, and is used for placing the equal-height iron in the subsequent processing procedure;
the inner hole correction belt is used for ensuring coaxial with a main shaft of the machine tool;
the rib side ensures parallelism with the main shaft of the machine tool for correcting the parallelism of the inner hole axis with the main shaft of the machine tool.
In a preferred embodiment, in step S3, the inner hole correction tape is a distance from the inner wall of the inner hole.
In the preferred scheme, in step S3, the inner hole correction belt is positioned on the inner wall of the inner hole correction ring, a plurality of positioning holes are formed in the inner hole correction ring, a plurality of threaded holes are processed in the second end face of the shell, and the pin bolts penetrate through the positioning holes and are connected with the threaded holes.
In the preferred scheme, in the step S4, the first end face of the shell is placed on a contour iron, the side face of the rib plate is positioned, the tool setting is carried out by using an inner hole correction belt, and the main shaft of the vertical lathe is positioned parallel and coaxial with the axis of the inner hole.
In the preferred scheme, in the step S7, the bottom surface of a rib plate is placed on a contour iron, a boring machine main shaft is corrected by a flange excircle and is coaxial with the flange excircle, an inner sleeve inner hole is machined, the cylindricity of the inner hole is 0.027, and the roughness Ra1.6;
the rotating speed of the main shaft is 6-10 revolutions per minute, and the processing is carried out according to the steps of rough processing, semi-finishing and finishing.
In the preferred scheme, in the step S7, a cantilever shaft supporting device is arranged below a boring machine spindle, one end of the cantilever shaft supporting device is provided with a flange mounting seat and is fixedly connected with the boring machine, the other end of the cantilever shaft supporting device is positioned below the boring machine spindle close to a cutter position, the cantilever shaft supporting device is formed by welding a transverse plate and a vertical plate, and weight reducing holes are formed in the transverse plate and the vertical plate.
In the preferred scheme, in the step S7, a linear cutting device is used for processing an inner hole key groove, the bottom surface of a correction rib plate before processing is parallel to the coordinate plane of the linear cutting device, and the center of the inner hole is determined by aligning coordinate values of the inner hole in four directions;
when the coordinate values of the four directions are corrected, the wire cutting wire is tightly attached to the inner wall, and the direction of the wire cutting wire is observed and finely adjusted to ensure that the wire cutting electric spark is uniform up and down.
In the preferred scheme, in step S7, a right-angle milling head is mounted on the boring machine spindle, a cantilever shaft supporting device is arranged below the right-angle milling head, and a key groove of an inner hole is processed in a milling mode through the boring machine spindle.
The invention provides a high-precision processing method of an external installation reference guide shell, which can ensure the precision of a processing reference and an external installation reference by adopting the steps. Particularly, the position relation between the inner hole and the rib plate is ensured, the processing efficiency is improved, and the installation position and the inner hole of the inner sleeve have enough relative position precision, so that the processing and the installation precision of the inner hole are ensured. For the cold sleeve of a large part, a certain length is reserved on the copper sleeve in height and is used for processing the lifting hole. And when the inner hole is machined after the cold sleeve, the copper sleeve and the shell are machined to be smooth.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is a schematic cross-sectional view of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a schematic structural diagram of the present invention during processing.
Fig. 4 is a schematic structural view of the cantilever shaft supporting apparatus of the present invention.
In the figure: the device comprises a shell 1, an inner sleeve 2, a rib plate 3, a rib plate side surface 4, a rib plate bottom surface 5, a rib plate 6, a shell first end surface 7, a shell second end surface 8, a boring machine spindle 9, a cantilever shaft supporting device 10, a flange mounting seat 101, a transverse plate 102, a vertical plate 103, a lightening hole 104, an inner space correction ring 11, a pin bolt 12, a right angle milling head 13, a key slot 14 and a flange outer circle 15.
Detailed Description
The length of the shell of the guide device processed by the invention exceeds 1000mm, and the cylindricity of the inner hole is required to be 0.027mm; because of the installation requirements, strict dimensional accuracy requirements are provided between the key ways and the rib plate bottom planes, including parallelism, coaxiality, flatness and surface roughness requirements. As shown in fig. 2, the guiding device of the invention is composed of a shell 1, two rib plates 6 on the outer wall of the shell, four rib plates 3 between the rib plates 6 and the shell 1, and all parts are connected into a whole by welding.
As shown in fig. 1 to 3, a high-precision processing method for an externally mounted reference guide shell includes the following steps:
s1, scribing and checking blank allowance of a shell 1; ensuring that the mounting reference surface has machining allowance, and carrying out borrowing when necessary;
s2, boring and processing a plane of the bottom surface 5 of the rib plate, so as to ensure that the flatness reaches the standard;
in a preferred embodiment, in step S2, the flatness is less than 0.03mm.
S3, processing a first end face 7 of the shell, an inner hole correction belt and a rib plate side face 4 by taking the rib plate bottom face 5 as a reference, so as to ensure that the precision reaches the standard;
in the preferred scheme, in the step S3, the perpendicularity between the first end face 7 of the shell and the bottom face 5 of the rib plate is ensured, and the equal-height iron is placed in the subsequent processing procedure;
the inner hole correction belt is used for ensuring coaxial with a main shaft of the machine tool;
the rib flanks 4 ensure parallelism with the spindle of the machine tool for correcting the parallelism of the internal bore axis of the housing 1 with the spindle of the machine tool.
In a preferred embodiment, in step S3, the inner hole correction tape is a distance from the inner wall of the inner hole. For example, a section of 10mm is machined as an inner bore correction tape to correct that the inner bore axis of the housing 1 is parallel to the main axis of a machine tool such as a lathe.
In another alternative, as shown in fig. 3, in step S3, the inner hole correction belt is located on the inner wall of the inner hole correction ring 11, a plurality of positioning holes are formed in the inner hole correction ring 11, a plurality of threaded holes are formed in the second end surface 8 of the housing, and the pin bolts 12 pass through the positioning holes to be connected with the threaded holes. With this configuration, machining errors can be avoided.
S4, using the first end face 7, the rib plate side face 4 and the inner hole correction belt as references, and processing an inner hole of the shell 1, the second end face 8 of the shell and the outer circle 15 of the flange by using a vertical lathe; the flange excircle 15 processed at the position is used as a reference for adjusting the coaxiality of the inner hole of the inner sleeve 2.
In a preferred scheme, in step S4, the first end face 7 of the shell is placed on a contour iron, the side face 4 of the rib plate is positioned, the tool setting is carried out by using an inner hole correction belt, and the main shaft of the vertical lathe is positioned in parallel and coaxially with the inner hole axis of the shell 1.
S5, turning the outer circle of the inner sleeve 2 until the precision reaches the standard, and reserving a margin in an inner hole and a margin in one end face; usually greater than 10mm and processing a lifting screw hole on the end surface;
s6, cold-pressing the inner sleeve 2 into the shell 1, wherein two ends of the inner sleeve 2 extend out of two ends of the shell;
s7, processing an inner hole of the inner sleeve 2 to enable the inner hole to reach design accuracy;
in the preferred scheme, as shown in fig. 3, in step S7, the rib plate bottom surface 5 is placed on a contour iron, the boring machine spindle 9 is corrected to be coaxial with the flange excircle 15 by the flange excircle 15, the inner hole of the inner sleeve 2 is processed, the length of the inner sleeve 2 is 1080mm, the cylindricity of the inner hole is 0.027, and the roughness is 1.6;
the rotating speed of the main shaft is 6-10 revolutions per minute, and the processing is carried out according to the steps of rough processing, semi-finishing and finishing.
In the preferred scheme, in order to avoid the influence of the cantilever deformation of the boring lathe spindle 9 on the machining precision, the boring lathe spindle 9 is extended to a position suitable for machining the inner holes of all the inner sleeves 2, then the rib plate bottom surface 5 is placed on the equal-height iron, the equal-height iron and the shell 1 are integrally fixed on a workbench, and the influence of the cantilever deformation of the boring lathe spindle 9 on the machining precision is avoided in a movable workbench mode. And the rotating speed is set to be very low, so that the vibration of a cutter is avoided, the cylindricity precision of an inner hole is ensured, namely 6-10 revolutions per minute, and the feeding speed is carried out according to the steps of rough machining, semi-finishing and finishing. And finally, superfinishing the inner hole of the inner sleeve 2 by using a grinding wheel.
S8, machining a key slot of the inner sleeve 2;
in the preferred scheme, as shown in fig. 1, 3 and 4, in step S7, a cantilever shaft supporting device 10 is disposed below a boring machine spindle 9, one end of the cantilever shaft supporting device 10 is provided with a flange mounting seat 101 for fixedly connecting with the boring machine, the other end is located below the boring machine spindle 9 near to the cutter position and is in sliding connection with the boring machine spindle 9, that is, the boring machine spindle 9 can rotate on the end of the cantilever shaft supporting device 10, the cantilever shaft supporting device 10 is formed by welding a transverse plate 102 and a vertical plate 103, and weight reducing holes 104 are formed in the transverse plate 102 and the vertical plate 103.
In another alternative, in step S7, the inner hole key groove 14 is machined by using a wire cutting device, the bottom surface 5 of the correction rib before machining is parallel to the coordinate plane of the wire cutting device, and the center of the inner hole is determined by aligning the coordinate values of the four directions of the inner hole;
when the coordinate values of the four directions are corrected, the wire cutting wire is tightly attached to the inner wall, and the direction of the wire cutting wire is observed and finely adjusted to ensure that the wire cutting electric spark is uniform up and down.
In a further preferred embodiment, as shown in fig. 3, in step S7, a right-angle milling head 13 is mounted on the boring machine spindle 9, and a cantilever shaft support 10 is disposed below the right-angle milling head 13, and a key groove 14 of the inner bore is milled by the boring machine spindle 9. Since the machining precision of the wire cutting cannot meet the requirements, the right-angle milling head 13 is adopted to finish-mill the key groove 14, and the key groove 14 meeting the requirements of the design precision can be obtained.
The processing of the external installation reference guide shell is realized through the steps.
The foregoing embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without collision. The protection scope of the present invention is defined by the claims, and the protection scope includes equivalent alternatives to the technical features of the claims. I.e., equivalent replacement modifications within the scope of this invention are also within the scope of the invention.
Claims (10)
1. A high-precision machining method for an externally installed reference guide shell is characterized by comprising the following steps of:
s1, checking blank allowance of a shell (1);
s2, boring a plane of the bottom surface (5) of the rib plate to ensure that the flatness reaches the standard;
s3, processing a first end face (7), an inner hole correction belt and a rib plate side face (4) of the shell by taking the rib plate bottom face (5) as a reference, so as to ensure that the precision reaches the standard;
s4, processing an inner hole of the shell (1), a second end face (8) of the shell and an outer circle (15) of the flange by using the first end face (7), the rib plate side face (4) and the inner hole correction belt as references;
s5, turning the outer circle of the inner sleeve (2) until the precision reaches the standard, leaving allowance in the inner hole and leaving allowance in the end face of one end;
s6, cold-pressing the inner sleeve (2) into the shell (1), wherein two ends of the inner sleeve (2) extend out of two ends of the shell;
s7, processing an inner hole of the inner sleeve (2) to enable the inner hole to reach design accuracy;
s8, machining a key slot of the inner sleeve (2);
the processing of the external installation reference guide shell is realized through the steps.
2. The high-precision machining method for the external mounting reference guide shell according to claim 1, wherein the method comprises the following steps of: in step S2, the flatness is less than 0.03mm.
3. The high-precision machining method for the external mounting reference guide shell according to claim 1, wherein the method comprises the following steps of: in the step S3, the first end face (7) of the shell ensures the perpendicularity with the bottom face (5) of the rib plate, and is used for placing the equal-height iron in the subsequent processing procedure;
the inner hole correction belt is used for ensuring coaxial with a main shaft of the machine tool;
the rib sides (4) ensure parallelism with the main axis of the machine tool for correcting the parallelism of the bore axis with the main axis of the machine tool.
4. The high-precision machining method for the external mounting reference guide shell according to claim 1, wherein the method comprises the following steps of: in step S3, the inner hole correction tape is a distance from the inner wall of the inner hole.
5. The high-precision machining method for the external mounting reference guide shell according to claim 1, wherein the method comprises the following steps of: in the step S3, the inner hole correction belt is positioned on the inner wall of the inner hole correction ring (11), a plurality of positioning holes are formed in the inner hole correction ring (11), a plurality of threaded holes are processed in the second end face (8) of the shell, and the pin bolts (12) penetrate through the positioning holes to be connected with the threaded holes.
6. The high-precision machining method for the external mounting reference guide shell according to claim 1, wherein the method comprises the following steps of: in the step S4, the first end face (7) of the shell is placed on the equal-height iron, the side face (4) of the rib plate is positioned, the tool setting is carried out by using the inner hole correction belt, and the main shaft of the vertical lathe is positioned parallel and coaxial with the axis of the inner hole.
7. The high-precision machining method for the external mounting reference guide shell according to claim 1, wherein the method comprises the following steps of: in the step S7, the bottom surface (5) of the rib plate is placed on a contour iron, a boring machine main shaft (9) is corrected by a flange excircle (15) and is coaxial with the flange excircle (15), an inner hole of the inner sleeve (2) is processed, the cylindricity of the inner hole is 0.027, and the roughness Ra1.6 is achieved;
the rotating speed of the main shaft is 6-10 revolutions per minute, and the processing is carried out according to the steps of rough processing, semi-finishing and finishing.
8. The high-precision machining method for the external mounting reference guide shell according to claim 7, wherein the method comprises the following steps of: in the step S7, a cantilever shaft supporting device (10) is arranged below a boring machine spindle (9), one end of the cantilever shaft supporting device (10) is provided with a flange mounting seat (101) and is fixedly connected with the boring machine, the other end of the cantilever shaft supporting device is positioned below the boring machine spindle (9) close to a cutter position, the cantilever shaft supporting device (10) is formed by welding a transverse plate (102) and a vertical plate (103), and weight reducing holes (104) are formed in the transverse plate (102) and the vertical plate (103).
9. The high-precision machining method of the externally mounted reference guide housing according to claim 7 or 8, characterized by comprising the steps of: in the step S7, an inner hole key groove (14) is machined by using linear cutting equipment, the bottom surface (5) of the correction rib plate before machining is parallel to the coordinate plane of the linear cutting equipment, and the center of the inner hole is determined by aligning coordinate values of the inner hole in four directions;
when the coordinate values of the four directions are corrected, the wire cutting wire is tightly attached to the inner wall, and the direction of the wire cutting wire is observed and finely adjusted to ensure that the wire cutting electric spark is uniform up and down.
10. The high-precision machining method for the external mounting reference guide shell according to claim 1, wherein the method comprises the following steps of: in the step S7, a right-angle milling head (13) is arranged on the boring machine main shaft (9), a cantilever shaft supporting device (10) is arranged below the right-angle milling head (13), and a key groove (14) of an inner hole is processed in a milling mode through the boring machine main shaft (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310117935.7A CN116352378A (en) | 2023-02-15 | 2023-02-15 | High-precision machining method for external installation reference guide shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310117935.7A CN116352378A (en) | 2023-02-15 | 2023-02-15 | High-precision machining method for external installation reference guide shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116352378A true CN116352378A (en) | 2023-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310117935.7A Pending CN116352378A (en) | 2023-02-15 | 2023-02-15 | High-precision machining method for external installation reference guide shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116352378A (en) |
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2023
- 2023-02-15 CN CN202310117935.7A patent/CN116352378A/en active Pending
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