CN111536219A - Gear shaft and numerical control machining method thereof - Google Patents
Gear shaft and numerical control machining method thereof Download PDFInfo
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- CN111536219A CN111536219A CN202010360082.6A CN202010360082A CN111536219A CN 111536219 A CN111536219 A CN 111536219A CN 202010360082 A CN202010360082 A CN 202010360082A CN 111536219 A CN111536219 A CN 111536219A
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- 238000003754 machining Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000003801 milling Methods 0.000 claims abstract description 65
- 238000012545 processing Methods 0.000 claims abstract description 11
- 230000033001 locomotion Effects 0.000 claims description 25
- 238000005520 cutting process Methods 0.000 claims description 17
- 238000005553 drilling Methods 0.000 claims description 6
- 238000005461 lubrication Methods 0.000 description 14
- 239000003921 oil Substances 0.000 description 13
- 239000007921 spray Substances 0.000 description 7
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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Classifications
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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
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
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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
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
Abstract
The invention relates to the technical field of gear shafts, in particular to a gear shaft and a numerical control machining method thereof; the gear shaft comprises a shaft body, a step part arranged at the input end of the shaft body and a gear part arranged at the output end of the shaft body; the gear part consists of a half gear part and a driving gear part which are sequentially connected with the shaft body, the driving gear part is provided with a plurality of gear teeth used for being meshed with the low-speed stage internal gear, and the half gear part is provided with a plurality of half gear teeth matched with the gear teeth of the driving gear part; the step part is a cylinder with a step surface on one side, and the end surface of the step part is provided with a counter bore with internal threads; the numerical control machining method utilizes a four-axis numerical control machine to machine the gear shaft, comprises the steps of blank pretreatment, modeling, tool path planning, rough machining, semi-finish machining, finish machining and the like, and can realize high-precision milling machining of the gear shaft. Compared with the prior art, the invention can prolong the service life and improve the stability of the gear shaft, and has high processing efficiency and processing precision and good finished product quality.
Description
Technical Field
The invention relates to the technical field of gear shafts, in particular to a gear shaft and a numerical control machining method thereof.
Background
The gear shaft is the most important supporting rotary part in the engineering machinery, can realize the rotary motion of the gear and other parts, can transmit torque and power in a long distance, is widely applied to the engineering machinery with the advantages of high transmission efficiency, long service life, compact structure and the like, becomes one of basic parts of the engineering machinery transmission, and is commonly used in a high-speed stage to drive a low-speed stage gear. At present, with the rapid development of domestic economy and the expansion of infrastructure, a new wave is generated for the demand of engineering machinery. The material selection of the gear shaft inherently has a great influence on the service life and the operational stability, but the structural design of the gear shaft has a negligible influence on the service life and the operational stability. This is because the lubrication of the gear shaft is an important factor for ensuring its service life and operational stability, and a good structural design should be able to facilitate the lubrication of the gear shaft. The gear shaft generally adopts two lubrication modes of self-lubrication and external lubrication. The external lubrication mode adopts oil immersion lubrication or oil spray lubrication, although the oil spray lubrication has good heat dissipation effect, but the oil spray lubrication is usually used for a gear shaft matched with a low-speed-level external gear, a nozzle directly sprays lubricating oil to the gear meshing part of the low-speed-level external gear (gear teeth on the outer side) and the gear shaft, at present, the oil spray lubrication is rarely applied to the gear shaft matched with the low-speed-level internal gear (gear teeth on the inner side) and vertically arranged for use, the nozzle is inconvenient to arrange, the oil spray lubrication can be mostly only used in a self-lubricating mode, the self-lubricating mode needs to open an oil hole on the gear shaft (such as a reduction gearbox gear shaft disclosed by Chinese patent CN 207921273U), and the oil spray lubrication mode.
In addition, with the rising of the numerical control machining mode, the machining of the gear shaft with more diversified design can be met, the numerical control machining mode of the gear shaft is researched, and the numerical control machining mode has practical significance for improving the machining quality and prolonging the service life of the gear shaft.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a gear shaft and a numerical control machining method thereof. The gear shaft is suitable for oil injection lubrication of the gear shaft which is matched with a low-speed-level internal gear (gear teeth on the inner side) and is vertically used, the service life and the stability of the gear shaft are prolonged, the processing efficiency and the processing precision are high, and the finished product quality is good.
The purpose of the invention can be realized by the following technical scheme:
the invention provides a gear shaft, comprising a shaft body, a step part arranged at the input end of the shaft body and a gear part arranged at the output end of the shaft body; the gear part consists of a half gear part and a driving gear part which are sequentially connected with the shaft body, the driving gear part is provided with a plurality of gear teeth used for being meshed with the low-speed stage internal gear, and the half gear part is provided with a plurality of half gear teeth matched with the gear teeth of the driving gear part; the step part is a cylinder with a step surface on one side, and a counter bore with internal threads is arranged on the end surface of the step part.
Preferably, the distance from the top of the half gear teeth of the half gear part to the shaft center is equal to the reference circle radius of the driving gear part.
Preferably, the diameter of the root circle of the gear part is smaller than the diameter of the shaft body.
Preferably, the diameter of the cylindrical surface of the step portion is smaller than the diameter of the shaft body.
As a preferred technical scheme, the internal thread of the counter bore is positioned on one side of the counter bore, which is close to the end face.
The invention provides a numerical control machining method of a gear shaft, which comprises the following steps:
s1: processing the blank into a stepped shaft matched with the gear shaft, and drilling a hole on the end face of one end of the stepped shaft, which is used for forming a step part;
s2: establishing a gear shaft three-dimensional model by utilizing UG software according to the gear shaft parameters;
s3: establishing a milling cutter motion track for rough machining of the gear part according to the gear shaft model established in the step S2;
s4: establishing a milling cutter motion track of the semi-finishing of the gear part according to the gear shaft model established in the step S2;
s5: establishing a milling cutter motion track for finishing the gear part according to the gear shaft model established in the step S2;
s6: according to the shaft gear model established in the step S2, establishing a milling cutter motion track for processing the step surface of the step part;
s7: generating a G code according to the milling cutter motion track established in the steps S3-S6;
s8: and (4) guiding the G code generated in the step (S7) into a four-axis machining center, and finishing the machining of the gear shaft by using the four-axis machining center, wherein the rough machining process of the gear part adopts cavity milling, the semi-finish machining process of the gear part adopts cavity milling, the finish machining process of the gear part adopts depth profile milling, and the step surface machining adopts plane profile milling.
As a preferred technical scheme:
in step S3, the rough-machined milling cutter of the gear part is milled layer by layer from top to bottom;
in step S4, the top of the cutting layer range of the gear portion rough-machined milling cutter motion trajectory starts from the bottom of the gear portion rough-machined cutting layer range;
in step S5, the finish machining of the gear portion is performed by selecting the two sides of the gear tooth and the half gear tooth of the gear portion and milling the selected two sides until the machining of the entire gear portion is completed.
As a preferable technical scheme, the rough machining of the gear part adopts a milling cutter with the diameter of 1mm, the cutting depth of each cutter is 0.05mm, the feeding speed is 500mm/min, the rotating speed of a main shaft is 6000r/min, the machining allowance is 0.1mm, and the bottom surfaces and the side surfaces of the gear teeth and the half gear teeth of the gear part are consistent.
As the preferred technical scheme, the gear part semi-finishing adopts a milling cutter with the diameter of 0.8mm and the lower radius of 0.1 mm; the cutting depth of each cutter is 0.02mm, the feeding speed is 500mm/min, the rotating speed of the main shaft is 6000r/min, the allowance of the side surfaces of the gear teeth and the half gear teeth is 0.1mm, and the allowance of the bottom surfaces of the gear teeth and the half gear teeth is 0.01 mm.
As a preferable technical scheme, a milling cutter with the diameter of 0.8mm and the lower radius of 0.1mm is adopted for finish machining of the gear part; the cutting depth of each cutter is 0.04mm, the feeding speed is 600mm/min, the rotating speed of the main shaft is 3000r/min, and the finishing allowance is 0 mm.
Compared with the prior art, the invention has the following beneficial effects:
(1) the gear shaft is in a vertical state when working, and the half gear part is positioned above the driving gear part, the half gear part is arranged above the driving gear part meshed with the low-speed-level internal gear, so that an oil injection site is provided for an oil injection lubricating nozzle, the arrangement of the nozzle is convenient, for example, the nozzle can be directly opposite to the half gear part above the meshing position of the driving gear part and the low-speed-level internal gear (or above the meshing position), lubricating oil is sprayed, flows downwards along gaps between teeth of the half gear teeth and flows to the driving gear part, a gear pair is lubricated, the lubricating effect is good, and the service life and the working stability of the gear shaft can be effectively prolonged.
(2) The shape of the half gear part enables the nozzle to be closer to the gear part, so that the spraying effect is better while the nozzle is easier to arrange.
(3) The design of step portion has promoted reliability and steadiness that this gear shaft and power input equipment are connected.
(4) The numerical control machining method realizes the high-precision milling of the gear surface of the gear shaft, is suitable for the gear milling, can realize the gear shaft machining without a forming milling cutter and a special machine tool compared with a hobbing method and a powder metallurgy method in the prior art, has the characteristics of high machining efficiency, high precision and the like, and widens the machining method of the gear shaft.
Drawings
FIG. 1 is a schematic structural view of a gear shaft of the present invention;
FIG. 2 is a schematic structural view of a stepped shaft according to the present invention;
FIG. 3 is a schematic diagram showing the movement locus of a milling cutter in the rough machining process of the gear portion according to the present invention;
FIG. 4 is a schematic diagram of the movement path of the milling cutter of the gear part semi-finishing machine of the present invention;
figure 5 is a schematic view of the motion trajectory of the milling cutter establishing the gear part finishing of the present invention.
In the figure, 1 is a shaft body, 2 is a stepped portion, 21 is a stepped surface, 22 is a counter bore, 3 is a gear portion, 31 is a half gear portion, and 32 is a drive gear portion.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Example 1
A gear shaft, as shown in figure 1, comprises a shaft body 1, a step part 2 arranged at the input end of the shaft body 1 and a gear part 3 arranged at the output end of the shaft body 1; the gear part 3 is composed of a half gear part 31 and a driving gear part 32 which are sequentially connected with the shaft body 1, wherein the driving gear part 32 is provided with a plurality of gear teeth for being meshed with the low-speed stage internal gear, and the half gear part is provided with a plurality of half gear teeth matched with the gear teeth of the driving gear part 31; the step part 2 is a cylinder with a step surface 21 on one side, and the end surface of the step part 21 is provided with a counter bore 22 with internal threads.
In the present embodiment, the main parameters of the drive gear part 32 are shown in table 1. Further, the distance from the tooth tip of the half gear 31 to the axis is equal to the reference circle radius of the driving gear 32, and the sectional shape of the half gear 31 is equal to the sectional shape of the remaining portion of the driving gear after the gear tooth reference circle is cut.
TABLE 1 Main parameter table of active gear part
In the present embodiment, the diameter of the root circle of the gear portion 3 is smaller than the diameter of the shaft body 1. The cylindrical diameter of the step part 2 is smaller than that of the shaft body 1. The internal threads of the counterbore 22 are located on the side of the counterbore 22 that faces inwardly.
More specifically, in the present embodiment, the shaft body 1 is a length
Diameter of
The length of the driving gear part 32 is 17.5cm, the diameter of the half gear part 31 connected between the driving gear part 32 and the shaft body 1 is 10mm, and the length isAt 4.5cm, the main parameters of the drive gear part 32 are: the tooth number is 10, the normal modulus is 1, the normal pressure angle is 20 degrees, the diameter of an addendum circle is 12mm, the diameter of a reference circle is 10mm, the diameter of a dedendum circle is 7.5mm, the radial deflection coefficient is 0, the center distance of a gear pair and the limit deviation thereof are 21.5 +/-0.0165 mm, the tooth number of a matched gear is 33, the radial runout tolerance of a gear ring is-0.036 mm, the length variation tolerance of a common normal line is 0.028mm, the tooth form tolerance is-0.011 mm, the limit deviation of a base pitch is 0.013mm, and the tooth direction tolerance is 0.011. Step 2 length
A cylinder with a diameter of 7mm is milled with a step surface of 1.2mm on one side. The depth of the bottom hole of the part of the counter bore 22 is 8.6cm, and the depth of the internal thread of M4 is 6.5 cm.
The gear shaft is in a vertical state when working, and the half gear part is positioned above the driving gear part, the half gear part is arranged above the driving gear part meshed with the low-speed-level internal gear, so that an oil injection site is provided for an oil injection lubricating nozzle, the arrangement of the nozzle is convenient, for example, the nozzle can be directly opposite to the half gear part above the meshing position of the driving gear part and the low-speed-level internal gear (or above the meshing position), lubricating oil is sprayed, flows downwards along gaps between teeth of the half gear teeth and flows to the driving gear part, a gear pair is lubricated, the lubricating effect is good, and the service life and the working stability of the gear shaft can be effectively prolonged.
The numerical control machining method of the gear shaft is characterized by comprising the following steps of:
s1: machining the blank into a stepped shaft matched with the gear shaft and drilling a hole in the end face of one end of the stepped shaft (see figure 2) for forming a stepped part;
s2: establishing a gear shaft three-dimensional model by utilizing UG software according to the gear shaft parameters; more specifically, in the present embodiment, the three-dimensional model of the gear shaft includes an outer circle of 7mm and a depth of 6 cm; 8mm excircle, depth 26cm, modulus 1, pressure angle 20 degrees, addendum circle diameter 12mm, reference circle diameter 10mm, root circle diameter 7.5mm driving gear part, depth 17.5 cm; a 10mm excircle with the depth of 4.5mm is formed at the joint of the driving gear part and the shaft body, a 3.3mm bottom hole with the depth of 8.6cm and M4 threads is formed on the end face of the 7mm excircle part, the depth is 6.5cm, the 7mm excircle part is provided with a plane, and the height is 5.8 mm;
s3: establishing a milling cutter movement locus for rough machining of the gear portion according to the gear shaft model established in step S2, as shown in fig. 3;
s4: establishing a milling cutter motion trajectory for semi-finishing the gear portion according to the gear shaft model established in step S2, as shown in fig. 4;
s5: establishing a motion trajectory of the milling cutter for finishing the gear portion, as shown in fig. 5, based on the gear shaft model established in step S2;
s6: according to the shaft gear model established in the step S2, establishing a milling cutter motion track for processing the step surface of the step part;
s7: generating a G code according to the milling cutter motion track established in the steps S3-S6;
s8: and (4) guiding the G code generated in the step (S7) into a four-axis machining center, and finishing the machining of the gear shaft by using the four-axis machining center, wherein the rough machining process of the gear part adopts cavity milling, the semi-finish machining process of the gear part adopts cavity milling, the finish machining process of the gear part adopts depth profile milling, and the step surface machining adopts plane profile milling.
In step S1, the blank needs to be made into a stepped shaft structure for convenience of clamping and tool retracting during machining. The blank can be processed into a stepped shaft and drilled by manually programming turning and drilling programs, an excircle with the diameter of 14 mm is clamped by a hard three-jaw chuck, a central drilling point central hole is drilled by a drill bit, the depth of a bottom hole of M4 is 8.6cm, the depth of a tap of M4 is tapped by 6.5cm, and a thread gauge is detected. In order to save the working time of a machining center, a common machine tool can be used for machining a blank into a stepped shaft and drilling holes. The shape of the stepped shaft and the size and depth of the size hole are determined according to the parameters of a specific gear shaft.
Further, the method comprises the following steps: in step S3, the milling cutter movement path of the gear portion rough machining is milling layer by layer from top to bottom, and the rough machining cannot go deep to the bottom surface due to the diameter of the cutter. The steps of machining the gear by adopting a four-axis machining center are different from those of a hobbing machine, the hobbing machine has the machining characteristic that the gear is integrally and continuously formed, and the four-axis machining center has the machining characteristic that tooth grooves are excavated one by one to finally form the gear; the rough machining of the gear part adopts a milling cutter with the diameter of 1mm, the cutting depth of each cutter is 0.05mm, the feeding speed is 500mm/min, the rotating speed of a main shaft is 6000r/min, the machining allowance is 0.1mm, and the bottom surfaces and the side surfaces of the gear teeth and the half gear teeth of the gear part are consistent.
In step S4, the top of the cutting layer range of the milling cutter movement track roughly machined by the gear portion starts from the bottom of the roughly machined cutting layer range of the gear portion, and the top of the cutting layer range semi-finished by the gear portion starts from the bottom of the roughly machined cutting layer range, so that the tool path movement track is optimized; the semi-finishing of the gear part adopts a milling cutter with the diameter of 0.8mm and the lower radius of 0.1 mm; the cutting depth of each cutter is 0.02mm, the feeding speed is 500mm/min, the rotating speed of the main shaft is 6000r/min, the allowance of the side surfaces of the gear teeth and the half gear teeth is 0.1mm, and the allowance of the bottom surfaces of the gear teeth and the half gear teeth is 0.01 mm.
In step S5, the finish machining of the gear portion is performed by selecting two side faces of the gear teeth and the half gear teeth of the gear portion to be milled until the machining of the entire gear portion is completed, and the finish machining is performed by further milling on the basis of the previous two steps until the final effect is achieved; the gear part is finely processed by a milling cutter with the diameter of 0.8mm and the lower radius of 0.1 mm; the cutting depth of each cutter is 0.04mm, the feeding speed is 600mm/min, the rotating speed of the main shaft is 3000r/min, and the finishing allowance is 0 mm.
The numerical control machining method is a method for milling the gear shaft on a universal four-axis numerical control machining center. A gear shaft model is established, and a milling cutter motion track is designed according to the gear shaft model. Firstly, a milling cutter with the diameter of 1mm is used for milling rough machining by a cavity milling method, and the machining allowance is 0.1 mm. And then, semi-finishing by using a milling cutter with the diameter of 0.8mm and the lower radius of 0.1mm by a cavity milling method, wherein the allowance of the side surface of the gear is 0.1mm, and the allowance of the bottom surface is 0.01 mm. And finally, performing finish machining by using a milling cutter with the diameter of 0.8mm and the lower radius of 0.1mm through a depth profile milling method, wherein the machining allowance is 0 mm. The method realizes the high-precision milling of the gear surface of the gear shaft, is suitable for the gear milling, can realize the gear shaft processing without a forming milling cutter and a special machine tool compared with a hobbing method and a powder metallurgy method in the prior art, has the characteristics of high processing efficiency, high precision and the like, and widens the processing method of the gear shaft.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. A gear shaft is characterized by comprising a shaft body (1), a step part (2) arranged at the input end of the shaft body (1) and a gear part (3) arranged at the output end of the shaft body (1); the gear part (3) consists of a half gear part (31) and a driving gear part (32) which are sequentially connected with the shaft body (1), wherein the driving gear part (32) is provided with a plurality of gear teeth for being meshed with a low-speed stage internal gear, and the half gear part is provided with a plurality of half gear teeth matched with the gear teeth of the driving gear part (31); the step part (2) is a cylinder with a step surface (21) on one side, and a counter bore (22) with internal threads is arranged on the end surface of the step part (21).
2. Gear shaft according to claim 1, characterised in that the distance of the half-gear tooth tips of the half-gear part (31) from the axis is equal to the reference circle radius of the drive gear part (32).
3. A gear shaft according to claim 1, characterised in that the root circle diameter of the gear part (3) is smaller than the diameter of the shaft body (1).
4. Gear shaft according to claim 1, characterised in that the cylindrical diameter of the step (2) is smaller than the diameter of the shaft body (1).
5. A gear shaft according to claim 1, characterised in that the internal thread of the counter bore (22) is located on the side of the counter bore (22) which is inwardly directed towards the end face.
6. A numerical control machining method of a gear shaft is characterized by comprising the following steps:
s1: processing the blank into a stepped shaft matched with the gear shaft, and drilling a hole on the end face of one end of the stepped shaft, which is used for forming a step part;
s2: establishing a gear shaft three-dimensional model by utilizing UG software according to the gear shaft parameters;
s3: establishing a milling cutter motion track for rough machining of the gear part according to the gear shaft model established in the step S2;
s4: establishing a milling cutter motion track of the semi-finishing of the gear part according to the gear shaft model established in the step S2;
s5: establishing a milling cutter motion track for finishing the gear part according to the gear shaft model established in the step S2;
s6: according to the shaft gear model established in the step S2, establishing a milling cutter motion track for processing the step surface of the step part;
s7: generating a G code according to the milling cutter motion track established in the steps S3-S6;
s8: and (4) guiding the G code generated in the step (S7) into a four-axis machining center, and finishing the machining of the gear shaft by using the four-axis machining center, wherein the rough machining process of the gear part adopts cavity milling, the semi-finish machining process of the gear part adopts cavity milling, the finish machining process of the gear part adopts depth profile milling, and the step surface machining adopts plane profile milling.
7. The numerical control machining method of a gear shaft according to claim 6, characterized in that:
in step S3, the rough-machined milling cutter of the gear part is milled layer by layer from top to bottom;
in step S4, the top of the cutting layer range of the gear portion rough-machined milling cutter motion trajectory starts from the bottom of the gear portion rough-machined cutting layer range;
in step S5, the finish machining of the gear portion is performed by selecting the two sides of the gear tooth and the half gear tooth of the gear portion and milling the selected two sides until the machining of the entire gear portion is completed.
8. The numerical control machining method of a gear shaft according to claim 6, characterized in that the rough machining of the gear portion uses a milling cutter with a diameter of 1mm, a cutting depth of 0.05mm per cutter, a feed speed of 500mm/min, a spindle rotation speed of 6000r/min, a machining allowance of 0.1mm, and bottom surfaces and side surfaces of the gear teeth and the half gear teeth of the gear portion are coincident.
9. The numerical control machining method of a gear shaft according to claim 6, characterized in that the gear portion semi-finishing uses a milling cutter with a diameter of 0.8mm and a lower radius of 0.1 mm; the cutting depth of each cutter is 0.02mm, the feeding speed is 500mm/min, the rotating speed of the main shaft is 6000r/min, the allowance of the side surfaces of the gear teeth and the half gear teeth is 0.1mm, and the allowance of the bottom surfaces of the gear teeth and the half gear teeth is 0.01 mm.
10. The numerical control machining method of a gear shaft according to claim 6, characterized in that the gear portion is finish-machined using a milling cutter having a diameter of 0.8mm and a lower radius of 0.1 mm; the cutting depth of each cutter is 0.04mm, the feeding speed is 600mm/min, the rotating speed of the main shaft is 3000r/min, and the finishing allowance is 0 mm.
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| DE102016223098A1 (en) * | 2016-11-23 | 2018-05-24 | Schaeffler Technologies AG & Co. KG | Multiple gear and transmission with at least one multiple gear |
| CN109812488A (en) * | 2019-03-15 | 2019-05-28 | 安徽瑞吉安新能源汽车科技有限公司 | A kind of hollow gear shaft and two grades of gearboxes with the hollow gear shaft |
| CN110227914A (en) * | 2019-05-27 | 2019-09-13 | 郑州机械研究所有限公司 | A kind of high-precision processing method of the gear shaft of finishing mill of high-speed wire rod mill group |
| KR20200000189A (en) * | 2018-06-22 | 2020-01-02 | 주식회사 에코텍 | apparatus of the shaft type roller gear cam |
| CN212225921U (en) * | 2020-04-30 | 2020-12-25 | 上海建桥学院 | Gear shaft |
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| CN108032039A (en) * | 2017-12-05 | 2018-05-15 | 肇庆市裕兴门控有限公司 | A kind of sector shaft and its processing technology for closer |
| KR20200000189A (en) * | 2018-06-22 | 2020-01-02 | 주식회사 에코텍 | apparatus of the shaft type roller gear cam |
| CN109812488A (en) * | 2019-03-15 | 2019-05-28 | 安徽瑞吉安新能源汽车科技有限公司 | A kind of hollow gear shaft and two grades of gearboxes with the hollow gear shaft |
| CN110227914A (en) * | 2019-05-27 | 2019-09-13 | 郑州机械研究所有限公司 | A kind of high-precision processing method of the gear shaft of finishing mill of high-speed wire rod mill group |
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