CN112296614A - Machining method for intermediate shaft of gearbox - Google Patents
Machining method for intermediate shaft of gearbox Download PDFInfo
- Publication number
- CN112296614A CN112296614A CN202011185274.4A CN202011185274A CN112296614A CN 112296614 A CN112296614 A CN 112296614A CN 202011185274 A CN202011185274 A CN 202011185274A CN 112296614 A CN112296614 A CN 112296614A
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- transmission gear
- key groove
- intermediate shaft
- processed
- transmission
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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
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Gears, Cams (AREA)
Abstract
The invention discloses a method for processing a gearbox intermediate shaft, which comprises the following steps of; a, acquiring a middle shaft blank and roughly turning the blank; b, turning to obtain center holes of the outer end faces of the input shaft section and the output shaft section of the intermediate shaft; c, processing to obtain a long key groove and a semicircular key groove on the input shaft section of the intermediate shaft; d, processing to obtain a first transmission gear, a second transmission gear and a third transmission gear on the output shaft section of the intermediate shaft; e, carrying out heat treatment on the intermediate shaft; f, grinding a long key groove, grinding a semicircular key groove and grinding an excircle; in the step c, a tip mechanism is adopted to tightly push the two central holes processed in the step b and finish the processing of the long key groove; c, tightly propping the two central holes processed in the step b by using a tip mechanism, and preventing the middle shaft from rotating by using the processed long key groove as a positioning reference to process a semicircular key groove; the invention has the characteristics of reducing the processing and manufacturing cost, improving the position precision among all transmission structures on the intermediate shaft and improving the processing precision.
Description
Technical Field
The invention belongs to the technical field of gearbox intermediate shaft machining, and particularly relates to a gearbox intermediate shaft machining method.
Background
As shown in figure 1, the intermediate shaft structure in the gearbox comprises an input shaft section and an output shaft section, wherein a long key groove and a semicircular key groove are formed in the input shaft section, a first transmission gear, a second transmission gear and a third transmission gear are arranged on the output shaft section at intervals, and the intermediate shaft is designed and processed in such a way that the long key groove and the semicircular key groove in the intermediate shaft and tooth grooves of three transmission gears in the intermediate shaft are on the same straight line so as to meet the transmission requirements.
In the existing processing technology, a positioning hole needs to be processed on one end face of a middle shaft, then a tip mechanism is adopted to tightly push against two ends of the middle shaft, a positioning pin correspondingly arranged is inserted into the positioning pin hole arranged on the end face of one end of the middle shaft so as to prevent the middle shaft from rotating during processing, and a transmission gear part structure is processed. The machining and manufacturing process has the following disadvantages: 1, a positioning hole needs to be machined, so that the machining and manufacturing cost is increased, and the strength of the end part of the whole intermediate shaft is influenced; 2, positioning is carried out by adopting positioning holes, and a long key groove, a semicircular key groove and three transmission gears on the middle shaft are respectively processed, so that the position precision among the long key groove, the semicircular key groove and the three gears on the middle shaft is low, and the design requirement cannot be well met; 3, the positioning pin hole and the positioning pin are adopted for positioning, and the positioning pin is easy to wear, so that the positioning precision is reduced, and the processing precision of the whole intermediate shaft is influenced.
Therefore, it is a technical problem to be solved by those skilled in the art to provide a method for machining a countershaft of a transmission capable of reducing the machining and manufacturing cost, improving the positional accuracy between the transmission structures on the countershaft, and improving the machining accuracy.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: provided is a method for machining a transmission intermediate shaft, which can reduce the machining and manufacturing cost, can improve the position precision between transmission structures on the intermediate shaft, and can improve the machining precision.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for machining a middle shaft of a gearbox comprises the following steps; a, acquiring a middle shaft blank and roughly turning the blank; b, turning to obtain center holes of the outer end faces of the input shaft section and the output shaft section of the intermediate shaft; c, processing to obtain a long key groove and a semicircular key groove on the input shaft section of the intermediate shaft; d, processing to obtain a first transmission gear, a second transmission gear and a third transmission gear on the output shaft section of the intermediate shaft; e, carrying out heat treatment on the intermediate shaft; f, grinding a long key groove, grinding a semicircular key groove and grinding an excircle; the method is characterized in that in the step c, a tip mechanism is adopted to tightly push the two central holes processed in the step b and complete the processing of the long key groove; c, tightly propping the two central holes processed in the step b by using a tip mechanism, and preventing the middle shaft from rotating by using the processed long key groove as a positioning reference to process a semicircular key groove; in the step d, a tip mechanism is adopted to tightly push the two central holes processed in the step b, the processed long key groove is used as a positioning reference to prevent the intermediate shaft from rotating, and the first transmission gear, the second transmission gear and the third transmission gear on the output shaft section of the intermediate shaft are processed.
Therefore, in the gearbox intermediate shaft processing method, when the semicircular key groove is processed, the central holes at two ends of the intermediate shaft are tightly propped, the long key groove processed in the previous step is used as a clamping positioning reference to prevent rotation, and when the semicircular key groove is processed, the clamping positioning reference is changed into the long key groove, so that the processed semicircular key groove and the processed long key groove can be better positioned in the same linear direction, and the position accuracy of the semicircular key groove and the processed long key groove is higher. When the first transmission gear, the second transmission gear and the third transmission gear are processed, central holes at two ends of the intermediate shaft are tightly propped, the long key groove processed in the previous step is used as a clamping and positioning reference to prevent rotation, and the first transmission gear, the second transmission gear and the third transmission gear are obtained through reprocessing; the positioning and clamping datum of the semicircular key groove, the first transmission gear, the second transmission gear and the third transmission gear is unified, and in the positioning and clamping datum, the long key groove, the semicircular key groove, the first transmission gear, the second transmission gear and the third transmission gear are required by position accuracy, so that the tooth grooves of the long key groove, the semicircular key groove, the first transmission gear, the second transmission gear and the third transmission gear which are processed can be better located in the same straight line direction. Compared with the original machining process, the machining process can omit the process step of machining the positioning pin hole, save the machining cost, improve the machining efficiency, and better ensure the strength of the end part of the intermediate shaft. Therefore, the method has the advantages that the processing and manufacturing cost can be reduced, the position precision among all transmission structures on the intermediate shaft can be improved, and the processing precision can be improved.
As an optimization, the following steps are included in step d; and c, on a gear hobbing machine tool, tightly jacking the two central holes processed in the step b by adopting a tip mechanism, preventing the intermediate shaft from rotating by taking the processed long key groove as a positioning reference, and respectively obtaining a first transmission gear, a second transmission gear and a third transmission gear through gear hobbing.
Therefore, when the first transmission gear, the second transmission gear and the third transmission gear are machined, hobbing machining is sequentially carried out on the first transmission gear, the second transmission gear and the third transmission gear, in addition, when clamping and positioning are carried out, a tip mechanism is adopted for tightly jacking the two central holes machined in the step b, and the machined long key groove is used as a positioning reference for preventing the rotation of the intermediate shaft. The first transmission gear, the second transmission gear and the third transmission gear which are obtained through machining are higher in position accuracy, and the tooth grooves of the first transmission gear, the second transmission gear and the third transmission gear are better located in the same linear direction with the long key groove and the semicircular key groove.
And d, optimally, the step d further comprises the step of tightly jacking the two central holes processed in the step b by adopting a tip mechanism, and respectively processing the two central holes by shaving to obtain a first transmission gear, a second transmission gear and a third transmission gear.
Therefore, the first transmission gear, the second transmission gear and the third transmission gear which are processed are higher in precision, and the transmission requirements are better met.
Preferably, the step b further comprises the step of tapping the central hole on the input shaft section of the intermediate shaft to obtain an internal thread.
Therefore, when the center hole on the input shaft section of the intermediate shaft is used for tapping, a three-jaw chuck is used for clamping.
In the step e, the intermediate shaft heat treatment comprises carburizing treatment, and the position of the internal thread on the input shaft section of the intermediate shaft is coated with anti-carburizing coating to achieve thread anti-seepage; and shot blasting and straightening treatment after heat treatment.
Therefore, the intermediate shaft is carburized, and during the carburization, the anti-carburizing coating is coated at the position of the internal thread on the input shaft section of the intermediate shaft to achieve thread anti-seepage, so that the internal thread can be better protected. The shot blasting can eliminate internal stress and then straighten.
As an optimization, the step d further comprises the step of chamfering the first transmission gear, the second transmission gear and the third transmission gear.
Therefore, the first transmission gear, the second transmission gear and the third transmission gear can be better matched with other transmission components in a transmission mode when in work.
As an optimization, the step d also comprises a step of marking.
Like this, through beating the sign, can judge the model of jackshaft better.
And c, optimally, milling by using a horizontal milling machine to obtain the long key groove and the semicircular key groove.
Therefore, the long key groove and the semicircular key groove are obtained by milling of the horizontal milling machine, and the processing and the manufacturing are more convenient.
Drawings
Fig. 1 shows the structure of an intermediate shaft machined by a conventional process.
Fig. 2 shows the structure of the intermediate shaft machined by the method of the invention.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
referring to fig. 1 and 2: a method for machining a middle shaft of a gearbox comprises the following steps; a, acquiring a middle shaft blank and roughly turning the blank; b, turning to obtain outer end face center holes of the input shaft section 1 and the output shaft section 2 of the intermediate shaft; c, processing to obtain a long key groove 3 and a semicircular key groove 4 on the input shaft section of the intermediate shaft; d, processing to obtain a first transmission gear 5, a second transmission gear 6 and a third transmission gear 7 on the output shaft section of the intermediate shaft; e, carrying out heat treatment on the intermediate shaft; f, grinding a long key groove, grinding a semicircular key groove and grinding an excircle; in the step c, a tip mechanism is adopted to tightly push the two central holes processed in the step b and finish the processing of the long key groove; c, tightly propping the two central holes processed in the step b by using a tip mechanism, and preventing the middle shaft from rotating by using the processed long key groove as a positioning reference to process a semicircular key groove; in the step d, a tip mechanism is adopted to tightly push the two central holes processed in the step b, the processed long key groove is used as a positioning reference to prevent the intermediate shaft from rotating, and the first transmission gear, the second transmission gear and the third transmission gear on the output shaft section of the intermediate shaft are processed.
Therefore, in the gearbox intermediate shaft processing method, when the semicircular key groove is processed, the central holes at two ends of the intermediate shaft are tightly propped, the long key groove processed in the previous step is used as a clamping positioning reference to prevent rotation, and when the semicircular key groove is processed, the clamping positioning reference is changed into the long key groove, so that the processed semicircular key groove and the processed long key groove can be better positioned in the same linear direction, and the position accuracy of the semicircular key groove and the processed long key groove is higher. When the first transmission gear, the second transmission gear and the third transmission gear are processed, central holes at two ends of the intermediate shaft are tightly propped, the long key groove processed in the previous step is used as a clamping and positioning reference to prevent rotation, and the first transmission gear, the second transmission gear and the third transmission gear are obtained through reprocessing; the positioning and clamping datum of the semicircular key groove, the first transmission gear, the second transmission gear and the third transmission gear is unified, and in the positioning and clamping datum, the long key groove, the semicircular key groove, the first transmission gear, the second transmission gear and the third transmission gear are required by position accuracy, so that the tooth grooves of the long key groove, the semicircular key groove, the first transmission gear, the second transmission gear and the third transmission gear which are processed can be better located in the same straight line direction. Compared with the original machining process, the machining process can omit the process step of machining the positioning pin hole 8 (shown in figure 1), save the machining cost, improve the machining efficiency, and better ensure the strength of the end part of the intermediate shaft. Therefore, the method has the advantages that the processing and manufacturing cost can be reduced, the position precision among all transmission structures on the intermediate shaft can be improved, and the processing precision can be improved.
In this embodiment, the step d includes the following steps; and c, on a gear hobbing machine tool, tightly jacking the two central holes processed in the step b by adopting a tip mechanism, preventing the intermediate shaft from rotating by taking the processed long key groove as a positioning reference, and respectively obtaining a first transmission gear, a second transmission gear and a third transmission gear through gear hobbing.
Therefore, when the first transmission gear, the second transmission gear and the third transmission gear are machined, hobbing machining is sequentially carried out on the first transmission gear, the second transmission gear and the third transmission gear, in addition, when clamping and positioning are carried out, a tip mechanism is adopted for tightly jacking the two central holes machined in the step b, and the machined long key groove is used as a positioning reference for preventing the rotation of the intermediate shaft. The first transmission gear, the second transmission gear and the third transmission gear which are obtained through machining are higher in position accuracy, and the tooth grooves of the first transmission gear, the second transmission gear and the third transmission gear are better located in the same linear direction with the long key groove and the semicircular key groove.
In this specific embodiment, the step d further includes a step of tightly ejecting the two center holes processed in the step b by using a tip mechanism, and obtaining a first transmission gear, a second transmission gear and a third transmission gear by shaving respectively.
Therefore, the first transmission gear, the second transmission gear and the third transmission gear which are processed are higher in precision, and the transmission requirements are better met.
In this embodiment, step b further includes the step of tapping the central hole on the input shaft section of the intermediate shaft to obtain an internal thread.
Therefore, when the center hole on the input shaft section of the intermediate shaft is used for tapping, a three-jaw chuck is used for clamping.
In the specific embodiment, in the step e, the intermediate shaft heat treatment comprises carburizing treatment, and the position of the internal thread on the input shaft section of the intermediate shaft is coated with anti-carburizing coating to achieve thread anti-seepage; and shot blasting and straightening treatment after heat treatment.
Therefore, the intermediate shaft is carburized, and during the carburization, the anti-carburizing coating is coated at the position of the internal thread on the input shaft section of the intermediate shaft to achieve thread anti-seepage, so that the internal thread can be better protected. The shot blasting can eliminate internal stress and then straighten.
In this embodiment, step d further includes chamfering the first transmission gear, the second transmission gear, and the third transmission gear.
Therefore, the first transmission gear, the second transmission gear and the third transmission gear can be better matched with other transmission components in a transmission mode when in work.
In this embodiment, step d further includes a step of marking an identifier.
Like this, through beating the sign, can judge the model of jackshaft better.
In this specific embodiment, in step c, a long keyway and a semicircular keyway are obtained by milling with a horizontal milling machine.
Therefore, the long key groove and the semicircular key groove are obtained by milling of the horizontal milling machine, and the processing and the manufacturing are more convenient.
In the specific embodiment, the method further comprises a finished product inspection step, a cleaning step and a packaging and warehousing step.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (8)
1. A method for machining a middle shaft of a gearbox comprises the following steps; a, acquiring a middle shaft blank and roughly turning the blank; b, turning to obtain center holes of the outer end faces of the input shaft section and the output shaft section of the intermediate shaft; c, processing to obtain a long key groove and a semicircular key groove on the input shaft section of the intermediate shaft; d, processing to obtain a first transmission gear, a second transmission gear and a third transmission gear on the output shaft section of the intermediate shaft; e, carrying out heat treatment on the intermediate shaft; f, grinding a long key groove, grinding a semicircular key groove and grinding an excircle; the method is characterized in that in the step c, a tip mechanism is adopted to tightly push the two central holes processed in the step b and complete the processing of the long key groove; c, tightly propping the two central holes processed in the step b by using a tip mechanism, and preventing the middle shaft from rotating by using the processed long key groove as a positioning reference to process a semicircular key groove; in the step d, a tip mechanism is adopted to tightly push the two central holes processed in the step b, the processed long key groove is used as a positioning reference to prevent the intermediate shaft from rotating, and the first transmission gear, the second transmission gear and the third transmission gear on the output shaft section of the intermediate shaft are processed.
2. A method of manufacturing a transmission countershaft according to claim 1 wherein: the step d comprises the following steps; and c, on a gear hobbing machine tool, tightly jacking the two central holes processed in the step b by adopting a tip mechanism, preventing the intermediate shaft from rotating by taking the processed long key groove as a positioning reference, and respectively obtaining a first transmission gear, a second transmission gear and a third transmission gear through gear hobbing.
3. A method of manufacturing a transmission countershaft according to claim 2 wherein: and d, tightly ejecting the two central holes processed in the step b by adopting an ejecting mechanism, and respectively processing the two central holes by shaving to obtain a first transmission gear, a second transmission gear and a third transmission gear.
4. A method of manufacturing a transmission countershaft according to claim 1 wherein: and b, tapping the central hole on the input shaft section of the intermediate shaft to obtain an internal thread.
5. A method of manufacturing a gearbox countershaft according to claim 4 wherein: step e, performing heat treatment on the intermediate shaft, including carburizing treatment, and coating anti-carburizing paint on the position of the internal thread on the input shaft section of the intermediate shaft to achieve thread anti-seepage; and shot blasting and straightening treatment after heat treatment.
6. A method of manufacturing a transmission countershaft according to claim 1 wherein: and d, chamfering the first transmission gear, the second transmission gear and the third transmission gear.
7. A method of manufacturing a transmission countershaft according to claim 1 wherein: step d also comprises a step of marking.
8. A method of manufacturing a transmission countershaft according to claim 1 wherein: and c, milling by using a horizontal milling machine to obtain the long key groove and the semicircular key groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011185274.4A CN112296614A (en) | 2020-10-30 | 2020-10-30 | Machining method for intermediate shaft of gearbox |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011185274.4A CN112296614A (en) | 2020-10-30 | 2020-10-30 | Machining method for intermediate shaft of gearbox |
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| CN112296614A true CN112296614A (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011185274.4A Pending CN112296614A (en) | 2020-10-30 | 2020-10-30 | Machining method for intermediate shaft of gearbox |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6161722A (en) * | 1984-08-31 | 1986-03-29 | Aisin Seiki Co Ltd | Method of cutting teeth of timing gear |
| CN102672441A (en) * | 2012-04-28 | 2012-09-19 | 重庆市江津区宏盛机械制造有限公司 | Light rail intermediate shaft machining process |
| CN102937173A (en) * | 2012-11-22 | 2013-02-20 | 无锡威孚中意齿轮有限责任公司 | Herringbone gear shaft and production method thereof |
| CN104874986A (en) * | 2015-05-06 | 2015-09-02 | 柳州金茂机械有限公司 | Intermediate shaft machining technology |
| CN107081486A (en) * | 2017-05-05 | 2017-08-22 | 中煤张家口煤矿机械有限责任公司 | A kind of high-efficiency machining method of short tooth wheel shaft |
| CN108486707A (en) * | 2018-03-17 | 2018-09-04 | 江阴市东杰纺机专件有限公司 | A kind of split type compact spinning roller and its processing technology |
-
2020
- 2020-10-30 CN CN202011185274.4A patent/CN112296614A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6161722A (en) * | 1984-08-31 | 1986-03-29 | Aisin Seiki Co Ltd | Method of cutting teeth of timing gear |
| CN102672441A (en) * | 2012-04-28 | 2012-09-19 | 重庆市江津区宏盛机械制造有限公司 | Light rail intermediate shaft machining process |
| CN102937173A (en) * | 2012-11-22 | 2013-02-20 | 无锡威孚中意齿轮有限责任公司 | Herringbone gear shaft and production method thereof |
| CN104874986A (en) * | 2015-05-06 | 2015-09-02 | 柳州金茂机械有限公司 | Intermediate shaft machining technology |
| CN107081486A (en) * | 2017-05-05 | 2017-08-22 | 中煤张家口煤矿机械有限责任公司 | A kind of high-efficiency machining method of short tooth wheel shaft |
| CN108486707A (en) * | 2018-03-17 | 2018-09-04 | 江阴市东杰纺机专件有限公司 | A kind of split type compact spinning roller and its processing technology |
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Application publication date: 20210202 |
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