A gear shaft part processing gear aligning method

Abstract

The present application belongs to the technical field of mechanical manufacturing, and relates to a gear alignment method for machining gear shaft parts. An alignment tool is fitted on the outer part of the part to be machined. The alignment tool is provided with a variable-thickness inner gear ring, and a correction surface is arranged on the outer circle of the variable-thickness gear ring. The tooth thickness of the variable-thickness inner gear ring gradually decreases from the large end surface to the small end surface, and the tooth thickness of the machined gear on the part is within the range of the variable-thickness gear ring. When the part is clamped, the machined gear is put into the inner gear ring from the small end surface of the variable-thickness inner gear ring, so that the machined gear is in the variable-thickness inner gear ring and forms a gapless fit with the variable-thickness inner gear ring. The relative position of the machined gear in the machine tool is determined, thereby determining the initial position of the gear to be machined, and the alignment of the gear to be machined and the machined gear is realized. The present application enables the part and the tool to be self-adaptively engaged without gap through the tapered progressive fit, eliminates the problem of reduced position accuracy caused by the gap when engaged, and meets the high-precision alignment position requirements of the part.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mechanical manufacturing, and relates to a gear shaft part machining gear alignment method. BACKGROUND

[0002] In the design of gear shaft parts, in order to meet the transmission and connection requirements, there are usually double gears, triple gears or multiple gears on one part, and in order to meet the transmission accuracy requirements, there are also strict position relationship requirements between the gears, which are usually represented by the position deviation of the two gear tooth grooves or tooth tips on the drawing with an accuracy of less than a few minutes of return difference index. Sometimes the high-precision gear alignment requirements are even higher, reaching below one minute of return difference index.

[0003] In actual processing, in order to ensure the position relationship of the two gears, a special gear alignment tooling is usually needed, and the position of the gear is indirectly aligned by the tooling. The commonly used gear alignment tooling in the gear cutting process is a straight gear meshing type gear alignment tooling, that is, a straight gear tooling is made to mesh with the part gear in the form of a spline to fix the position of the part. The shaft part structure is shown in Figure 1 , which includes a machined gear 1 and a to-be-processed gear 2. The straight gear meshing type gear alignment tooling is shown in Figure 2 . The machined gear 1 and the straight gear meshing type gear alignment tooling 3 are positioned by spline cooperation. In order to ensure the smooth meshing of the tooling and the gear part, there must be a certain difference between the tooling and the gear part, which will cause a gap between the tooling and the gear part when they are meshed, as shown in Figure 3 , affecting the final gear alignment accuracy and failing to meet the high-precision gear alignment requirements. At the same time, because of the tolerance of the gear thickness, the meshing gap between the tooling and the gear part of different batches is different, which will cause the processing accuracy of different batches of parts to be different, and in severe cases, the tooling cannot be used and needs to be re-made. Especially when processing batch products, the gear part and tooling gap cooperation tolerances of each batch and each part are not completely the same, and a corresponding tooling matching the gap cannot be made for each part. This will increase the cost of part processing and tooling manufacturing, which is very uneconomical, and will also increase the workload of the operator for processing adjustment, reducing the production efficiency. SUMMARY

[0004] Therefore, the purpose of the present application is to solve the gear alignment accuracy problem of the gear shaft part, and to provide a gear shaft part machining gear alignment method.

[0005] In order to achieve the above purpose, the present application provides the following technical scheme:

[0006] A gear shaft part machining gear alignment method, a positioning tooling is sleeved on a to-be-processed part, a variable-thickness internal gear ring is arranged in the positioning tooling, and a correction surface is arranged on the outer circle of the variable-thickness internal gear ring.

[0007] The two ends of the variable-thickness inner gear ring are divided into a large end face and a small end face according to the size of the tooth thickness value, the tooth thickness of the variable-thickness inner gear ring gradually decreases from the large end face to the small end face, the tooth thickness value of the machined tooth on the part is within the tooth thickness variation range of the variable-thickness inner gear ring; when the part is clamped, the machined tooth is placed into the inner gear ring from the small end face of the variable-thickness inner gear ring, so that the machined tooth is in the variable-thickness inner gear ring and forms a gapless fit with the variable-thickness inner gear ring; the machine tool is operated to correct the position through the correction face, so as to determine the relative position of the machined tooth in the machine tool, thereby determining the initial position of the to-be-machined tooth, and realizing the tooth alignment of the to-be-machined tooth and the machined tooth.

[0008] Further, a positioning disc is arranged at the bottom of the alignment tool, the positioning disc is in contact with the end face of the to-be-machined part, the end face of the to-be-machined part is positioned, and the gear is supported by the end face during gear insertion.

[0009] Further, a gasket is arranged between the positioning disc and the alignment tool, the gasket with a thickness corresponding to the tooth thickness of the machined tooth is selected to adjust the relative position of the alignment tool and the machined tooth, so that the machined tooth is in gapless fit with the variable-thickness inner gear ring of the alignment tool.

[0010] Further, the correction face of the alignment tool and the variable-thickness inner gear ring are machined through one-time clamping.

[0011] Further, the tooth thickness variation law of the variable-thickness inner gear ring is that, for each increase of 1 mm in the tooth width of the variable-thickness inner gear ring, the tooth thickness is increased by no more than 0.005 mm.

[0012] Further, the alignment tool is installed on the positioning disc through a connecting screw.

[0013] The beneficial effects of the present application are as follows:

[0014] According to the characteristics that the tooth thickness of the variable-thickness gear is continuously changed on the tooth width section, there is always a section that can be in gapless fit with the machined tooth within the tooth width range of the variable-thickness inner gear ring, the part and the tool can be self-adaptively gapless fitted through the tapered progressive fit, the circumferential gapless positioning is realized, the positioning error caused by the fitting gap is avoided, and the positioning height can be adjusted through the gasket according to the batch size variation of the to-be-machined part, so that the same tool can meet the machining use of different batches.

[0015] Other advantages, objects, and features of the present application will be in part apparent and in part pointed out hereinafter. Those skilled in the art will appreciate the teachings and purposes of the present application from the following specification and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to make the objects, technical solutions and advantages of the present application clearer, the preferred embodiments of the present application will be described in detail below with reference to the drawings, in which:

[0017] Figure 1 Fig. 1 is a structural schematic diagram of a gear shaft part in the present application.

[0018] Figure 2 3 Fig. 2 is a schematic diagram of a traditional straight-tooth meshing tooth aligning tool.

[0019] Figure 4 Fig. 3 is a schematic diagram of the use of a tooth aligning tool in the present application.

[0020] Figure 5 Fig. 4 is a top view of Fig. 3. Figure 4

[0021] Fig. 5 is a structural schematic diagram of a tooth aligning tool in the present application. Figure 6

[0022] Fig. 6 is a top view of Fig. 5. Figure 7 Figure 6

[0023] Fig. 1-processed teeth; 2-teeth to be processed; 3-straight-tooth meshing tooth aligning tool; 4-tooth aligning tool; 5-positioning disc; 6-connection screw; 7-gasket; 41-internal gear with variable tooth thickness; 42-correction surface. DETAILED DESCRIPTION

[0024] The present application will be described in greater detail by way of specific embodiments, from which its advantages and effects will be apparent to those skilled in the art. The present application can also be implemented or applied in other different specific embodiments, and the details in the present specification can be modified or changed in various ways based on different views and applications without departing from the spirit of the present application. It should be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present application, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0025] It should be noted that the drawings are only used for illustrative explanation, and the representation is only a schematic diagram, not a physical diagram, and should not be understood as a limitation of the present application; in order to better illustrate the embodiments of the present application, some components in the drawings can be omitted, enlarged or reduced, and do not represent the actual product size; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings can be omitted.

[0026] ​​​The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it is understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", etc. are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration and cannot be understood as a limitation on the present application, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0027] Please refer to Figures 4 to 7 The present application is a kind of gear shaft parts processing gear method, in the parts to be machined sleeve installation a alignment tool 4, alignment tool 4 is provided with variable tooth thickness inner gear 41, in the outer circle of variable tooth thickness inner gear is provided with correction surface 42;Variable tooth thickness inner gear 41 two ends are divided into large end face, small end face according to the size of tooth thickness value, the tooth thickness of variable tooth thickness inner gear 41 from large end face to small end face is from big to small, the tooth thickness value of the tooth 1 already machined on the part is within the range of tooth thickness change of variable tooth thickness inner gear;When clamping the part, the tooth 1 already machined is put into the inner gear from the small end face of variable tooth thickness inner gear 41, so that the tooth 1 already machined is in the variable tooth thickness inner gear 41, and forms a no gap fit with the variable tooth thickness inner gear 41;The machine tool is operated to correct the position through the correction surface 42, so as to determine the relative position of the tooth 1 already machined in the machine tool, thereby determining the initial position of the tooth 2 to be machined, realizing the gear of the tooth 2 to be machined and the tooth 1 already machined.

[0028] A positioning disc 5 is arranged at the bottom of the alignment tool 4, and the alignment tool 4 is installed on the positioning disc 5 through connecting screws 6. The positioning disc 5 is in contact with the end face of the part to be machined, and the end face of the part to be machined is positioned. A gasket 7 is arranged between the positioning disc 5 and the alignment tool 4, and the gasket 7 with a thickness corresponding to the tooth thickness of the tooth 1 already machined is selected to adjust the relative position of the alignment tool 4 and the tooth 1 already machined, so that the tooth 1 already machined and the variable tooth thickness inner gear 41 of the alignment tool 4 are in no gap fit.

[0029] In order to ensure the machining precision, the correction surface 42 of the alignment tool 4 and the variable tooth thickness inner gear 41 are machined by a slow wire cutting machine tool in one clamping.

[0030] The tooth thickness change rule of the variable tooth thickness inner gear 41 is that for every 1mm increase in the tooth width of the variable tooth thickness inner gear 41, the tooth thickness is increased by no more than 0.005mm.

[0031] It is convenient to gear, and the tooth thickness of the tooth 1 already machined in each batch of parts should be given a batch difference requirement, so as to avoid the need to adjust the positioning height of the alignment tool 4 due to the too large tooth thickness difference of the same batch of parts.

[0032] The correction surface 42 is corrected before processing, and the first gear cutting processing can be performed with a tooth thickness allowance. After the detection of the tooth precision is qualified, the gear cutting product is obtained. The subsequent same batch of parts do not need to be corrected again, and can be directly processed after being engaged with the tooling. When processing different batches of parts, the positioning height can be adjusted according to the actual gapless fitting condition, so as to ensure the tooth precision.

[0033] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions, and they should be covered in the scope of the claims of the present application.

Claims

1. A method for tooth alignment in machining gear shaft parts, characterized in that: An alignment fixture is fitted over the part to be processed. The alignment fixture has a variable tooth thickness internal gear ring inside, and a correction surface is provided on the outer circle of the variable tooth thickness gear ring. The two ends of the variable tooth thickness internal gear ring are divided into a large end face and a small end face according to the tooth thickness value. The tooth thickness of the variable tooth thickness internal gear ring decreases from the large end face to the small end face. The tooth thickness value of the machined teeth on the part is within the range of tooth thickness variation of the variable tooth thickness gear ring. When clamping the part, the machined teeth are placed into the internal gear ring from the small end face of the variable tooth thickness internal gear ring, so that the machined teeth are inside the variable tooth thickness internal gear ring and form a clearance-free fit with the variable tooth thickness internal gear ring. The machine tool is operated to correct the position through the correction surface to determine the relative position of the machined teeth in the machine tool, thereby determining the initial position of the teeth to be machined and realizing the tooth alignment between the teeth to be machined and the machined teeth. A positioning plate is set at the bottom of the alignment fixture. The positioning plate contacts the end face of the part to be processed and positions the end face of the part. A shim is set between the positioning plate and the alignment fixture. The shim of appropriate thickness is selected according to the tooth thickness of the processed tooth to adjust the relative position of the alignment fixture and the processed tooth, so that the processed tooth and the variable tooth thickness internal gear ring of the alignment fixture have a gapless fit.

2. The gear-setting method for machining gear shaft parts according to claim 1, characterized in that: The alignment surface of the alignment fixture and the variable tooth thickness internal gear ring are machined in one clamping operation.

3. The gear-setting method for machining gear shaft parts according to claim 1, characterized in that: The variation law of tooth thickness of variable tooth thickness internal gear ring from small end face to large end face is as follows: for every 1mm increase in tooth width of variable tooth thickness internal gear ring, the corresponding tooth thickness increases by no more than 0.005mm.

4. The gear-setting method for machining gear shaft parts according to claim 1, characterized in that: The alignment fixture is mounted on the positioning plate using connecting screws.

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