CN111590273A - Machining process of large gear box - Google Patents
Machining process of large gear box Download PDFInfo
- Publication number
- CN111590273A CN111590273A CN202010417441.7A CN202010417441A CN111590273A CN 111590273 A CN111590273 A CN 111590273A CN 202010417441 A CN202010417441 A CN 202010417441A CN 111590273 A CN111590273 A CN 111590273A
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- Prior art keywords
- minutes
- machining
- box body
- box
- box cover
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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
-
- 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
- B23Q3/06—Work-clamping means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
The invention relates to a machining process of a large gear box, which comprises the steps of preparing a box cover tool, a box body tool and a box body and box cover assembly tool, roughly machining blanks of the box cover, the box body, the box cover and the box body assembly on a horizontal machining center, then respectively finely machining the box cover, the box body, the box cover and the box body assembly, and performing drilling, milling and reaming machining through a numerical control program. The machining process of the large gear box has the advantages of one-step clamping and machining of one component, stress removal treatment, improvement of machining precision, easiness in operation and the like.
Description
Technical Field
The invention relates to the technical field of gear box processing, in particular to a processing technology of a large gear box.
Background
At present, the wind power industry is expanding rapidly, large gear boxes are widely applied to generator sets and are often used in the generator sets and are important mechanical components, and the gear boxes mainly serve to transmit generated power to generators and enable the generators to obtain corresponding rotating speeds. Gears are very important for mechanical products as one of the most common components in mechanical products, while gearboxes are also very important as a guard component for gear assemblies.
Cast gear box blank need process earlier, by gear box assorted frock clamping, the structure of gear box needs many times multiaspect processing, needs many equipment usually, and a plurality of processes are processed, and this has just increased the accumulative error, and manufacturing cost has been improved again in the use of many equipment to some equipment need professional technical staff to operate.
Therefore, a machining process of a large gear box is developed to solve the defects.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a processing technology of a large gear box, which has the advantages of one-step clamping and processing of a component, stress removal processing, improvement of processing precision, easiness in operation and the like.
In order to achieve the purpose, the invention adopts the technical scheme that: a machining process of a large gearbox comprises the following steps:
s1: preparing a box body tool, a box cover tool and a box body and box cover assembly tool, firstly installing the box cover tool on a horizontal machining center and correcting, installing a cast iron box cover blank on the box cover tool, pressing the cast iron box cover blank by using a pressing plate, wherein the preparation time is 240 minutes, drilling and milling positioning reference machining is carried out through a numerical control program, the tolerance of a positioning pin hole is ensured to be H7, and the machining time of drilling, milling and reaming is 260 minutes;
s2: switching to box body processing, wherein the preparation time is 240 minutes, taking off a box cover tool, installing the box body tool, pressing a cast iron box body on the box body tool by using a pressing plate, automatically changing the tool by using a numerical control program, drilling and reaming a positioning hole to enable the positioning hole to be matched with the positioning pin hole, wherein the drilling and milling processing time is 440 minutes, the tolerance of the positioning hole is H7, the position degree reaches phi 0.5, and the position degree of the H10 tolerance reaches phi 0.2;
s3: taking down the box body tool, installing the assembly tool on a horizontal machining center, locking the box cover and the box body through 2 phi 12 positioning pins and 4M 12 screws, needing 240 minutes of preparation time, and performing drilling, milling and rough machining, wherein the machining time is 450 minutes;
s4: fixing the box cover on the box cover tool again, wherein the preparation time is 100 minutes, the drilling and milling are carried out, the flatness of the blank in thickness finish machining is guaranteed to be 0.05, and the machining time is 120 minutes;
s5: the box body tool is reinstalled and corrected, the box body tool is positioned through 2 phi 8(+0.03/0) pin holes and is pressed tightly by a pressing plate, the preparation time is 150 minutes, and the processing working hour is 200 minutes;
s6: locking the box cover and the box body through 2 phi 12 positioning pins and 4M 12 screws, milling oil windows and nameplate holes, reserving 0.3mm for the surfaces, reserving 0.5mm for the holes, setting the preparation time to be 300 minutes, and setting the processing working hours to be 210 minutes;
s7: finely milling each plane, finely boring each bearing hole, wherein the interference fit tolerance range of the bearing hole is-0.062 mm to-0.026 mm, -0.061mm to-0.036 mm, the preparation time is 300 minutes, and the stress relief processing working hour is 120 minutes;
s8: deburring, cleaning, part number marking, paint filling, antirust oil coating, inspection and boxing, wherein the preparation time is 10 minutes, and the processing working hour is 30 minutes.
Preferably, in step S1, the case lid blank is subjected to rough machining in batch, and is subjected to milling, drilling and tapping, milling and drilling, drilling and tapping, and drilling and tapping according to the numerical control program in sequence.
Preferably, in step S2, the box blank is produced by rough machining in batch.
Preferably, in step S3, the assembly of the box body and the box cover is subjected to batch rough machining production.
Preferably, in step S4, a G-thread through hole is drilled to ensure that the thinnest part of the hole wall is greater than or equal to 2 mm.
Preferably, in step S5, the machining of the lifting hole is based on the external shape of the case blank.
Preferably, in step S6, all blind holes, through holes and threaded holes on the front and back sides of the assembly of the box body and the box cover are processed.
Preferably, in step S7, a T-mill is used, and the T-mill machines the T-shaped notch.
Preferably, in step S8, the paint is RAL7016, and the spraying interval is 3-5 minutes.
Preferably, the tolerance of each plane segment difference is finely milled to be +0.1/0 mm.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. because the rough machining and the finish machining of the box body and the box cover are finished in a horizontal machining center, the box body, the box cover and the components of the box body and the box cover respectively use a positioning tool, and the machining precision is improved;
2. the machining of all holes and end faces of the box body or the box cover is completed by one-time clamping, so that errors generated by secondary adjustment and installation and deformation errors of large-sized workpieces are reduced, and the machining precision is improved;
3. the stress removing treatment in the step S7 ensures that the internal structure of the box body and the box cover assembly is more stable, and improves the processing precision;
4. the surfaces and holes of the box body and the box cover are processed in a horizontal processing center, so that the intermediate process change link is reduced, and the processing efficiency is improved;
5. the invention is easy to operate, and can be operated by drilling and milling workers.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
A machining process of a large gearbox comprises the following steps:
s1: preparing a box body tool, a box cover tool and a box body and box cover assembly tool, firstly installing the box cover tool on a horizontal machining center and correcting, installing a cast iron box cover blank on the box cover tool, pressing the cast iron box cover blank by a pressing plate, wherein the preparation time is 240 minutes, drilling and milling positioning benchmark machining is carried out through a numerical control program, the tolerance of a positioning pin hole is ensured to be H7, and the machining time of drilling and milling hinges is 260 minutes. The box cover blank is subjected to batch rough machining production, and milling, drilling and reaming, drilling and tapping, milling and drilling, drilling and tapping and drilling and tapping are sequentially performed according to a numerical control program.
S2: switching to box body processing, wherein the preparation time is 240 minutes, taking off a box cover tool, installing the box body tool, pressing the cast iron box body on the box body tool by using a pressing plate, automatically changing the tool through a numerical control program, drilling and reaming a positioning hole to enable the positioning hole to be matched with the positioning pin hole, wherein the drilling and milling processing time is 440 minutes, the tolerance of the positioning hole is H7, the position degree reaches phi 0.5, and the position degree of the H10 tolerance reaches phi 0.2. And carrying out batch rough machining production on the box body blank.
S3: and taking down the box body tool, mounting the assembly tool on a horizontal machining center, locking the box cover and the box body through 2 phi 12 positioning pins and 4M 12 screws, requiring 240 minutes of preparation time, and performing drilling, milling and rough machining, wherein the machining time is 450 minutes. And the components of the box body and the box cover are subjected to batch rough machining production.
S4: and (3) fixing the box cover on the box cover tool again, wherein the preparation time is 100 minutes, the flatness of the blank after the blank is drilled and milled and the thickness of the blank is guaranteed to be 0.05, and the processing time is 120 minutes. And G thread through holes are drilled, and the thinnest part of the hole wall is ensured to be more than or equal to 2 mm.
S5: and (3) reinstalling the box body tooling and correcting, positioning through 2 phi 8(+0.03/0) pin holes and pressing by using a pressing plate, wherein the preparation time is 150 minutes, and the processing working time is 200 minutes. The position of the hoisting hole is processed by taking the appearance of the box body blank as a processing reference.
S6: the box cover and the box body are locked by 2 phi 12 positioning pins and 4M 12 screws, oil windows and nameplate holes are milled, the surface is reserved for 0.3mm, the hole is reserved for 0.5mm, the preparation time is 300 minutes, and the processing working time is 210 minutes. And processing all blind holes, through holes and threaded holes on the front and back sides of the box body and box cover assembly.
S7: finely milling each plane, finely boring each bearing hole, wherein the interference fit tolerance range of the bearing hole is-0.062 mm to-0.026 mm, the preparation time is 300 minutes, and the stress relief processing time is 120 minutes. And a T-shaped milling cutter is used for processing the T-shaped notch, and the tolerance of each plane section difference is finely milled to be +0.1/0 mm.
S8: deburring, cleaning, part number marking, paint filling, antirust oil coating, inspection and boxing, wherein the preparation time is 10 minutes, and the processing working hour is 30 minutes. The paint is RAL7016 coal gray, and the spraying interval is 3-5 minutes each time.
The processing technology of the large gear box has the following advantages:
1. because the rough machining and the finish machining of the box body and the box cover are completed in a horizontal machining center, the box body, the box cover and the components of the box body and the box cover respectively use a positioning tool, and the machining precision is improved.
2. The machining of all holes and end faces of the box body or the box cover is completed through one-time clamping, errors generated by secondary adjustment and installation and deformation errors of large-sized workpiece adjustment and installation are reduced, and machining precision is improved.
3. The stress removing treatment in the step S7 of the invention ensures that the internal structure of the box body and the box cover assembly is more stable, and improves the processing precision.
4. The surfaces and holes of the box body and the box cover are processed in a horizontal processing center, so that the intermediate process change link is reduced, and the processing efficiency is improved.
5. The invention is easy to operate, and can be operated by drilling and milling workers.
The above is only a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (10)
1. A processing technology of a large gear box is characterized in that: the method comprises the following steps:
s1: preparing a box body tool, a box cover tool and a box body and box cover assembly tool, firstly installing the box cover tool on a horizontal machining center and correcting, installing a cast iron box cover blank on the box cover tool, pressing the cast iron box cover blank by using a pressing plate, wherein the preparation time is 240 minutes, drilling and milling positioning reference machining is carried out through a numerical control program, the tolerance of a positioning pin hole is ensured to be H7, and the machining time of drilling, milling and reaming is 260 minutes;
s2: switching to box body processing, wherein the preparation time is 240 minutes, taking off a box cover tool, installing the box body tool, pressing a cast iron box body on the box body tool by using a pressing plate, automatically changing the tool by using a numerical control program, drilling and reaming a positioning hole to enable the positioning hole to be matched with the positioning pin hole, wherein the drilling and milling processing time is 440 minutes, the tolerance of the positioning hole is H7, the position degree reaches phi 0.5, and the position degree of the H10 tolerance reaches phi 0.2;
s3: taking down the box body tool, installing the assembly tool on a horizontal machining center, locking the box cover and the box body through 2 phi 12 positioning pins and 4M 12 screws, needing 240 minutes of preparation time, and performing drilling, milling and rough machining, wherein the machining time is 450 minutes;
s4: fixing the box cover on the box cover tool again, wherein the preparation time is 100 minutes, the drilling and milling are carried out, the flatness of the blank in thickness finish machining is guaranteed to be 0.05, and the machining time is 120 minutes;
s5: the box body tool is reinstalled and corrected, the box body tool is positioned through 2 phi 8(+0.03/0) pin holes and is pressed tightly by a pressing plate, the preparation time is 150 minutes, and the processing working hour is 200 minutes;
s6: locking the box cover and the box body through 2 phi 12 positioning pins and 4M 12 screws, milling oil windows and nameplate holes, reserving 0.3mm for the surfaces, reserving 0.5mm for the holes, setting the preparation time to be 300 minutes, and setting the processing working hours to be 210 minutes;
s7: finely milling each plane, finely boring each bearing hole, wherein the interference fit tolerance range of the bearing hole is-0.062 mm to-0.026 mm, the preparation time is 300 minutes, and the stress relief processing time is 120 minutes;
s8: deburring, cleaning, part number marking, paint filling, antirust oil coating, inspection and boxing, wherein the preparation time is 10 minutes, and the processing working hour is 30 minutes.
2. The manufacturing process of large gear box according to claim 1, wherein in step S1, the box cover blank is roughly manufactured in batch.
3. The process for manufacturing a large gearbox according to claim 2, wherein in step S2, the box blank is roughly manufactured in batch.
4. The manufacturing process of large gear box according to claim 3, wherein in step S3, the assembly of box body and box cover is rough machined in batch.
5. The machining process of the large gearbox according to claim 1, wherein in the step S4, a G-thread through hole is drilled and tapped, and the thinnest part of the hole wall is ensured to be larger than or equal to 2 mm.
6. The process for machining a large gearbox according to claim 1, wherein in step S5, the positions of the hoisting holes are machined based on the shape of the box blank.
7. The machining process of the large gearbox according to claim 1, wherein in step S6, all blind holes, through holes and threaded holes on the front and back sides of the assembly of the box body and the box cover are machined.
8. The process for machining a large gearbox according to claim 1, wherein a T-mill is used in step S7, and the T-mill machines T-shaped notches.
9. The processing technology of the large gearbox according to claim 1, wherein in the step S8, the paint is RAL7016, and the spraying interval is 3-5 minutes.
10. A machining process for a large gearbox according to claim 8, wherein the tolerance of each plane section difference is milled to +0.1/0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010417441.7A CN111590273A (en) | 2020-05-18 | 2020-05-18 | Machining process of large gear box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010417441.7A CN111590273A (en) | 2020-05-18 | 2020-05-18 | Machining process of large gear box |
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| CN111590273A true CN111590273A (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010417441.7A Pending CN111590273A (en) | 2020-05-18 | 2020-05-18 | Machining process of large gear box |
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| CN (1) | CN111590273A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112122888A (en) * | 2020-09-23 | 2020-12-25 | 浙江茸创机械制造有限公司 | Numerical control machining process for gearbox body |
| CN113894506A (en) * | 2021-10-29 | 2022-01-07 | 浙江金祖环境治理设备股份有限公司 | Manufacturing method of double-cavity type gear box |
| CN114683002A (en) * | 2022-03-31 | 2022-07-01 | 武汉轻工大学 | Grinding processing method for reducer case cover |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112122888A (en) * | 2020-09-23 | 2020-12-25 | 浙江茸创机械制造有限公司 | Numerical control machining process for gearbox body |
| CN113894506A (en) * | 2021-10-29 | 2022-01-07 | 浙江金祖环境治理设备股份有限公司 | Manufacturing method of double-cavity type gear box |
| CN113894506B (en) * | 2021-10-29 | 2023-11-17 | 浙江金祖环境治理设备股份有限公司 | Manufacturing method of double-cavity gear box |
| CN114683002A (en) * | 2022-03-31 | 2022-07-01 | 武汉轻工大学 | Grinding processing method for reducer case cover |
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Application publication date: 20200828 |
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