CN115255827A - Odd-gear input shaft of double-clutch transmission and machining method thereof - Google Patents
Odd-gear input shaft of double-clutch transmission and machining method thereof Download PDFInfo
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- CN115255827A CN115255827A CN202210903066.6A CN202210903066A CN115255827A CN 115255827 A CN115255827 A CN 115255827A CN 202210903066 A CN202210903066 A CN 202210903066A CN 115255827 A CN115255827 A CN 115255827A
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- 238000003754 machining Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000005540 biological transmission Effects 0.000 title claims abstract description 25
- 238000007514 turning Methods 0.000 claims abstract description 23
- 238000010862 gear shaping Methods 0.000 claims abstract description 13
- 230000009977 dual effect Effects 0.000 claims description 13
- 238000003672 processing method Methods 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 230000009191 jumping Effects 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000010923 batch production Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 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
Abstract
An odd-gear input shaft of a double-clutch transmission and a machining method relate to the technical field of part machining and solve the problems of high equipment cost and poor machining precision. The method comprises the following steps: clamping and turning the M2 section into an M3 section, supporting a center frame on the M3 section, drilling a K3 elongated hole from the tail end face of the blank inwards, and then boring and processing a B1 center hole; loosening the center frame, and tightly pushing the center hole B1 by the tailstock center to perform rough machining and finish machining on the sections M3 and M4 of the blank; the central frame is supported at the section M4, a T1 gear is machined, a K1-1 hole and a K1-2 hole are machined, and a G1 arc groove is machined; replacing the equipment jaw with a machinable jaw, boring the inner ring of the jaw, and clamping the M4 section after the part turns around; drilling a B2 center hole, and performing sectional machining on the M2 and M1 sections of shaft diameters; the center frame is supported on the M1 section, and the spline H1 gear shaping is processed.
Description
Technical Field
The invention relates to the technical field of part processing, in particular to a processing technology of an odd-number gear input shaft of a double-clutch transmission.
Background
Today, as the automobile industry develops rapidly, dual clutch transmissions have been widely used by various large vehicle companies due to their excellent performance and fuel economy. In the construction of a dual clutch transmission, there are two sets of input shafts, an odd-numbered gear input shaft and an even-numbered gear input shaft. The input shaft with even gears is a hollow long shaft, the input shaft with odd gears is a solid slender shaft, and the input shaft with odd gears and the gear with odd gears are pressed together and installed in the input shaft with even gears. Under the working conditions of high operation and high load for a long time, the machining precision of the input shaft directly influences the assembly precision and the operation stability of the whole transmission. Therefore, the requirement for the machining accuracy of the input shaft with odd gears is high.
In the prior art, an odd-gear input shaft is usually processed in a process dispersion mode, namely, a numerical control vehicle is used for performing rough and finish machining on the diameter of a rotating shaft, a machining center is used for performing drilling machining, a gear shaping machine is used for performing gear shaping machining, and a gear hobbing machine is used for performing gear hobbing machining, so that the equipment price is high, the production and manufacturing period of a clamp is long, and the odd-gear input shaft cannot be applied to small-batch production trial production.
In the prior art, the processing mode adopted by the odd-numbered gear input shaft of the double-clutch transmission is as follows:
(1) Processing all the rotating surfaces of the input shaft with odd gears by using a numerical control lathe;
(2) Drilling a radial hole on the part by using a machining center;
(3) Performing gear shaping on the spline part by using a gear shaping machine;
(4) The gear hobbing machine is used to perform gear hobbing on the gear part.
In this above-mentioned current processing technology, need use multiple equipment, the clamping is dismantled repeatedly to many sets of anchor clamps, process the different positions of part, the use cost of equipment is higher, cause the loss of precision of part simultaneously in the part clamping process repeatedly, can not guarantee spline precision and gear precision and with the precision of beating between the location footpath, it is long and thin to pay attention to very much that this odd grade input shaft is the slender axles, because whole rigidity is relatively poor in gear shaping and gear hobbing in-process, produce the vibration easily in the processing, cause spline and gear after the processing in the profile of tooth, the tooth to the aspect precision can not be guaranteed.
Disclosure of Invention
The invention provides an odd-numbered gear input shaft of a double-clutch transmission and a machining method thereof, aiming at solving the problems of high cost and poor machining precision in the prior art.
The technical scheme of the invention is as follows:
a processing method of an odd-gear input shaft of a dual-clutch transmission is characterized in that a processing raw material is a long-strip-shaped blank with a circular cross section, the blank is sequentially divided into four sections of M1, M2, M3 and M4 from a first section to a tail end, and the processing method comprises the following steps:
s1, clamping an M2 section on a turning and milling composite equipment chuck through an equipment clamping jaw, turning an M3 section, supporting a center frame on the turned M3 section, calling a drill bit to drill a K3 elongated hole inwards from the end face of the tail end of a blank, and calling a boring cutter to bore and machine a B1 center hole on the end face of the tail end of the blank;
s2, loosening the center frame, tightly pushing the tailstock center against the center hole of the B1, roughly machining the M3 and M4 sections of the blank, and finely machining the M3 and M4 sections of the blank;
s3, supporting the center frame on the processed M4 section, calling a hobbing cutter to process a T1 gear on the M3 section, calling a drill bit with the diameter of 3mm to drill a K1-1 hole and a K1-2 hole on the M4 section, and finally processing a G1 arc groove by taking the K1-1 hole and the K1-2 hole as centers;
s4, replacing the equipment jaw with a machinable jaw, calling an inner hole boring cutter to bore the inner ring of the machinable jaw, turning around the part machined in the step S3, and clamping the M4 section on the turned machinable jaw;
s5, calling a central drill to drill a B2 central hole, starting a turning and milling composite tailstock center to tightly push the B2 central hole, turning the position close to the M3 section in the M2 section, supporting a central frame at the turning position, machining the rest part of the M2 section, supporting the central frame at the position close to the M1 section in the M2 section, machining the M1 section, and finally calling a 3mm drill to drill a K2 hole in the M1 section;
s6, supporting the center frame at the M1 section position, and calling a gear shaping cutter to perform gear shaping processing on the spline H1.
Preferably, the shaft diameter relationship of the four sections of the M1, the M2, the M3 and the M4 is as follows: m1 is more than or equal to M4 and more than or equal to M2 and more than or equal to M3.
Preferably, the roughness after the center hole boring processing in the step S1 satisfies ra1.6, and the runout is not more than 0.008mm.
Preferably, the rough machining in the step S2 adopts a 75 ° rough turning tool.
Preferably, the finishing in step S2 uses a 93 ° tip.
Preferably, a single margin of 0.1mm is left after the rough machining in step S2.
Preferably, the G1 arc groove in step S3 is machined by a middle pointed cutter or an arc groove cutter.
Preferably, the diameter of the inner ring of the jaw after boring in the step S4 is greater than the shaft diameter D1 by 0.5mm and the runout is not greater than 0.01mm.
Preferably, the machinable jaws in step S4 are aluminum jaws.
The invention also provides an odd-gear input shaft of the double-clutch transmission, which is processed by applying the processing method.
Compared with the prior art, the invention solves the problems of high equipment cost and poor processing precision, and has the following specific beneficial effects:
1. according to the method for machining the odd-numbered gear input shaft of the double-clutch transmission, provided by the invention, different positions of a part are machined by adopting single equipment, multiple devices are not required, multiple sets of clamps are not required to be repeatedly disassembled and clamped, the equipment cost is saved, the product process chain is shortened, the production efficiency is improved, the equipment jaw machining period is short, and the method can be applied to small-batch production trial production.
2. The special processing sequence and the processing technology provided by the invention can effectively avoid the precision loss of the spline and the gear in the aspects of tooth shape and tooth direction in the processing process, and ensure the spline precision, the gear precision and the jumping precision between the spline precision and the positioning shaft diameter.
Drawings
FIG. 1 is a schematic view of a process flow according to the present invention;
FIG. 2 is a schematic diagram of a blank structure of the odd-numbered stage input shaft according to embodiment 1;
FIG. 3 is a schematic front view of the odd-numbered stage input shaft;
FIG. 4 is a schematic cross-sectional view of the odd-numbered stage input shaft;
fig. 5 is an enlarged schematic view of the G1 arc groove portion in example 1.
FIG. 6 is a schematic view of the clamping state of the clamping jaws of the equipment;
FIG. 7 is a schematic view of an inner ring of a machinable jaw;
FIG. 8 is a schematic view of a clamping state of a machinable jaw;
Detailed Description
In order to make the technical solutions of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the specification of the present invention, and it should be noted that the following embodiments are only used for better understanding of the technical solutions of the present invention, and should not be construed as limiting the present invention.
Example 1.
A processing method of an odd-numbered gear input shaft of a dual clutch transmission is disclosed, wherein a schematic flow diagram is shown in FIG. 1, the processed raw material is a long-strip-shaped blank with a circular cross section, the blank is sequentially divided into four sections of M1, M2, M3 and M4 from a first section to a tail end, as shown in FIG. 2, a schematic front view diagram of the odd-numbered gear input shaft of the dual clutch transmission processed by the method is shown in FIG. 3, for better understanding, reference is made to FIG. 4 which is a schematic sectional diagram of the input shaft, and the processing method comprises the following steps:
s1, clamping an M2 section on a chuck of the turning and milling composite equipment through equipment jaws, turning an M3 section in a clamping state as shown in figure 6, then supporting a center frame on the turned M3 section, calling a drill to drill a K3 elongated hole inwards from the end face of the tail end of a blank, and calling a boring cutter to bore and machine a B1 center hole on the end face of the tail end of the blank;
s2, loosening the center frame, tightly pushing the tailstock center against the center hole of the B1, roughly machining the M3 and M4 sections of the blank, and finely machining the M3 and M4 sections of the blank;
s3, supporting the center frame on the processed M4 section, calling a hobbing cutter to process a T1 gear on the M3 section, calling a drill bit with the diameter of 3mm to drill a K1-1 hole and a K1-2 hole on the M4 section, and finally processing a G1 arc groove by taking the K1-1 hole and the K1-2 hole as centers;
s4, replacing the equipment jaw with a machinable jaw, calling an inner hole boring cutter to bore and machine a machinable jaw inner ring, wherein the jaw inner ring is schematically shown in figure 7, turning around the part machined in the step S3, and clamping the M4 section on the turned machinable jaw, as shown in figure 8;
s5, calling a central drill to drill a B2 central hole, starting a turning and milling composite tailstock center to tightly push the B2 central hole, turning the position close to the M3 section in the M2 section, supporting a central frame at the turning position, machining the rest part of the M2 section, supporting the central frame at the position close to the M1 section in the M2 section, machining the M1 section, and finally calling a 3mm drill to drill a K2 hole in the M1 section;
s6, supporting the center frame at the M1 section position, and calling a gear shaping cutter to perform gear shaping processing on the spline H1.
In the step S2 of this embodiment, the rough machining and the finish machining of the M3 and the M4 sections are separately processed, so that the requirements of the diameter tolerance level h7 and the cylindricity of 0.02mm at the machining position are met, and the stability of the machining precision is ensured;
s3, firstly processing M3 and M4 sections of shaft diameters, and then processing a G1 arc groove, wherein an enlarged schematic diagram of the G1 arc groove is shown in FIG. 5, so that the risk of breakage of a drill bit caused by swinging of the drill bit at the bottom of the arc groove is avoided, and the influence on subsequent assembly caused by asymmetrical arcs on the left side and the right side of the central line of the processed G1 arc groove due to different front angle and rear angle angles of a cutter when the G1 arc groove is processed by a sharp cutter is avoided;
in the step S5, after the B2 center hole is drilled, the position close to the M3 section in the M2 section is turned at first, and the position is in a position with relatively good rigidity and is closest to the chuck, so that the phenomena of vibration and cutter back-off are avoided, and the jumping precision of the shaft diameter is ensured; compared with the conventional processing mode, the step adopts sectional processing, the integral rigidity of a turning position can be ensured in the processing process, the cutting speed and the cutting depth can be further improved, and the processing quality and the processing efficiency of a product can be obviously improved;
and S6, the D4 shaft diameter is supported by the central frame to be machined, and the spline is machined in a two-tip mode relative to the gear shaping machine.
Example 2.
In this embodiment, to further illustrate embodiment 1, the relationship between the axial diameters of the four sections M1, M2, M3, and M4 is as follows: m1 is more than or equal to M4 and more than or equal to M2 and more than or equal to M3.
The odd-gear input shaft blank adopted by the embodiment is designed according to the shape of the finished input shaft after processing, so that the subsequent processing is easy and the material cost is saved.
Example 3.
This example is a further illustration of example 1, where the roughness after the center hole boring processing described in step S1 satisfies ra1.6, and the runout is not more than 0.008mm.
Example 4.
This embodiment is a further example of embodiment 1, and the rough machining in step S2 uses a 75 ° rough turning tool.
Example 5.
This example is a further illustration of example 1, wherein the finishing in step S2 is performed using a 93 ° point tool.
Example 6.
This example is a further illustration of example 1, leaving a single margin of 0.1mm after the rough machining described in step S2.
Example 7.
In this embodiment, to further illustrate embodiment 1, the G1 arc groove in step S3 is machined by using a middle-set sharp knife or an arc groove knife.
Example 8.
This example is a further illustration of example 1, and the diameter of the inner ring of the jaw after the boring processing in step S4 is greater than the shaft diameter D1 by 0.5mm and the run-out is not greater than 0.01mm.
Example 9.
This example is a further illustration of example 1, where the machinable jaws in step S4 are aluminum jaws.
In order to adapt to M4 section diameter of axle, with M4 section clamping on the jack catch, the equipment jack catch is changed to aluminium system jack catch with this embodiment, and the material is softer than the part of centre gripping, and easily processing, and is with low costs.
Example 10.
The embodiment provides an odd-numbered gear input shaft of a dual clutch transmission, which is processed by applying the processing method in any one of the embodiments 1-9.
This embodiment two separation and reunion derailleur odd number shelves input shaft adopts single equipment to process the different positions of part, need not multiple equipment, many sets of anchor clamps and dismantles the clamping repeatedly, has practiced thrift the cost, and equipment jack catch processing cycle is short, can obtain using in small batch production trial-manufacture, and avoided the clamping in-process repeatedly to cause the precision loss of part, guarantee spline precision and gear precision and with the location axle diameter between the precision of beating.
Claims (10)
1. A processing method of an odd-gear input shaft of a dual-clutch transmission is characterized in that a processing raw material is a long-strip-shaped blank with a circular cross section, and the blank is divided into four sections of M1, M2, M3 and M4 areas from a first section to a tail end in sequence, and the processing method comprises the following steps:
s1, clamping an M2 section on a chuck of a turning and milling composite device through a device clamping jaw, turning an M3 section, supporting a center frame on the turned M3 section, calling a drill bit to drill a K3 elongated hole inwards from the end face of the tail end of a blank, and calling a boring cutter to bore and machine a B1 center hole on the end face of the tail end of the blank;
s2, loosening the center frame, tightly pushing the tailstock center against the center hole of the B1, roughly machining the M3 and M4 sections of the blank, and finely machining the M3 and M4 sections of the blank;
s3, supporting the center frame on the processed M4 section, calling a hobbing cutter to process a T1 gear on the M3 section, calling a drill bit with the diameter of 3mm to drill a K1-1 hole and a K1-2 hole on the M4 section, and finally processing a G1 arc groove by taking the K1-1 hole and the K1-2 hole as centers;
s4, replacing the equipment jaw with a machinable jaw, calling an inner hole boring cutter to bore the inner ring of the machinable jaw, turning around the part machined in the step S3, and clamping the M4 section on the turned machinable jaw;
s5, calling a central drill to drill a B2 central hole, starting a turning and milling composite tailstock center to tightly push the B2 central hole, turning the position close to the M3 section in the M2 section, supporting a central frame at the turning position, machining the rest part of the M2 section, supporting the central frame at the position close to the M1 section in the M2 section, machining the M1 section, and finally calling a 3mm drill to drill a K2 hole in the M1 section;
s6, supporting the center frame at the M1 section position, and calling a gear shaping cutter to perform gear shaping processing on the spline H1.
2. The method for processing the odd-numbered gear input shaft of the dual clutch transmission according to claim 1, wherein the shaft diameter relations of the four sections of the M1, the M2, the M3 and the M4 are as follows: m1 is more than or equal to M4 and more than or equal to M2 and more than or equal to M3.
3. The method for processing the odd-numbered input shaft of the dual clutch transmission according to claim 1, wherein the roughness after the center hole is bored in the step S1 meets Ra1.6, and the runout is not more than 0.008mm.
4. The method for machining the odd-numbered gear input shaft of the dual clutch transmission as claimed in claim 1, wherein the rough machining in the step S2 is performed by using a 75 ° rough turning tool.
5. The method for machining an odd-numbered gear input shaft of a dual clutch transmission as recited in claim 1, wherein a 93 ° tip cutter is used for finish machining in step S2.
6. The method for processing the odd-numbered gear input shaft of the double-clutch transmission as claimed in claim 1, wherein a single margin of 0.1mm is left after the rough processing in the step S2.
7. The method for processing the odd-numbered gear input shaft of the dual clutch transmission according to claim 1, wherein the G1 arc groove in the step S3 is processed by a middle pointed cutter or an arc groove cutter.
8. The method for processing the input shaft with the odd gears of the dual clutch transmission according to the claim 1 is characterized in that the diameter of the inner ring of the clamping jaw after boring processing in the step S4 is more than the shaft diameter D1 by 0.5mm and the jumping amount is not more than 0.01mm.
9. The method for machining the odd-numbered gear input shaft of the dual clutch transmission as recited in claim 1, wherein the machinable jaws in step S4 are aluminum jaws.
10. An odd-numbered gear input shaft of a dual clutch transmission, characterized by being manufactured by the method as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210903066.6A CN115255827B (en) | 2022-07-29 | Odd-gear input shaft of double-clutch transmission and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210903066.6A CN115255827B (en) | 2022-07-29 | Odd-gear input shaft of double-clutch transmission and processing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115255827A true CN115255827A (en) | 2022-11-01 |
| CN115255827B CN115255827B (en) | 2024-04-16 |
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| KR20190108251A (en) * | 2018-03-14 | 2019-09-24 | (주)성진포머 | Manufacturing method for integrated input shaft and integrated input shaft thereof |
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| KR100878113B1 (en) * | 2008-10-17 | 2009-01-14 | 김동욱 | Manufacturing method for car's steering part's input shaft and thereof product |
| CN102862020A (en) * | 2011-07-07 | 2013-01-09 | 梦想科技股份有限公司 | Input shaft of steering device for car and manufacturing method thereof |
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