CN218460033U - Oil pump gear root coating auxiliary fixtures - Google Patents
Oil pump gear root coating auxiliary fixtures Download PDFInfo
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- CN218460033U CN218460033U CN202222295223.8U CN202222295223U CN218460033U CN 218460033 U CN218460033 U CN 218460033U CN 202222295223 U CN202222295223 U CN 202222295223U CN 218460033 U CN218460033 U CN 218460033U
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Abstract
An auxiliary tool for oil pump gear tooth root coating comprises an annular base and a plurality of same strip-shaped shielding teeth, wherein the base and the shielding teeth are integrated; the diameter of the outer circle of the base is consistent with the diameter of a base circle of a gear to be machined, and the diameter of the inner hole of the base is matched with the shaft diameter of a shaft lever of the gear to be machined; the number of the shielding teeth is consistent with that of the teeth to be processed, the shielding teeth are uniformly distributed around the outer circumference of one side of the base, one end of each shielding tooth is vertically fixed on the end face of the base, and the shielding teeth are parallel to the axis of the base; the shielding curved surface of the shielding tooth is consistent with the arc shape of the tooth root of the gear to be processed, the starting point of the section of the shielding curved surface is positioned on the starting point of the involute of the tooth root of the gear to be processed, and the length of the shielding tooth is greater than the width of the tooth of the gear to be processed. The utility model discloses simple structure, convenient operation. Will the utility model discloses the cartridge is treating on the processing gear, through the sand blowing technology, the clear protective area of acquisition that can be very easy to operating personnel can be accurate paint protective coating, finally provide the condition for satisfying the cyanide layer that meets the requirements.
Description
Technical Field
The utility model belongs to a gear machining frock specifically is oil pump gear tooth root coating frock.
Background
The large-modulus oil pump gear is widely applied to the fields of aviation, aerospace and the like. The oil pump gear is mainly made of high-strength alloy steel materials, and is required to have a hard and wear-resistant surface and a tough core, and have high impact toughness. When the oil pump gear is processed, the gear needs to be subjected to cyaniding treatment, and the depth of a hydrogenated layer on the surface of the gear is required to be 0.3-0.5 times of the modulus. In practical use, the alternating stress borne by the tooth root is the largest, and the depth of the cyanide layer of the tooth root has the largest influence on the bending fatigue life of the gear, so that the area and the depth of the cyanide layer at the tooth root are more strictly controlled. The maximum depth of the cyanide layer at the tooth root of the gear is required to be 0.15mm.
In order to meet the requirement of the depth of a cyanide layer at the tooth root, the oil pump gear needs to be coated with protective paint on the arc area of the tooth root before cyaniding treatment. How to determine the area to apply the protective coating is as follows: firstly, the gear is subjected to an integral copper plating process, then a cyanidation area on the surface of the gear is processed by grinding the gear, a copper layer is still left in a tooth root circular arc area needing protection so as to preliminarily determine the position for smearing the protection material, then rust and other excess on the surface of the gear are removed by blowing sand, and finally the protection coating is smeared in the area where the copper layer is left in the tooth root circular arc. However, such a processing method has problems that: 1. if the copper layer is relatively poor in adhesion with the gear after copper plating, the copper layer on the gear tooth surface and the copper layer on the tooth root arc part can fall off in the gear grinding process, and the area needing to be protected on the tooth root arc part cannot be accurately identified when protective paint is coated. 2. If the copper layer is well attached to the gear after copper plating, the copper layer on the arc part of the tooth root does not fall off in the process of gear grinding, but the copper layer on the surface of the arc part of the tooth root is still damaged under the influence of a sand blowing process, so that the specific area of the arc part of the tooth root, which needs to be protected, can not be clearly determined in the process of coating.
As can be seen from the above, because the existing process has defects, the arc part of the tooth root can not be effectively protected, and the depth of the cyanide layer at the arc part can not meet the requirement.
Disclosure of Invention
In view of this, the utility model provides an oil pump gear tooth root coating frock can obtain the clear protective area in gear tooth root department to paint protective paint.
The utility model adopts the technical proposal that: the utility model provides an oil pump gear tooth root coating frock which characterized in that: the device comprises an annular base and a plurality of same strip-shaped shielding teeth, wherein the base and the shielding teeth are integrated; the diameter A of the outer circle of the base is consistent with the diameter of the base circle of the gear to be machined, and the diameter B of the inner hole of the base is matched with the shaft diameter of the shaft lever of the gear to be machined; the number of the shielding teeth is consistent with that of the gears to be processed, the shielding teeth are uniformly distributed around the outer circumference of one side of the base, one end of each shielding tooth is vertically fixed on the end face of the base, the shielding teeth are parallel to the axis of the base, and the diameter of the outer circumference formed by the shielding teeth is consistent with the diameter of a base circle of the gear to be processed; the shielding curved surface of the shielding tooth is consistent with the arc shape of the tooth root of the gear to be processed, the section starting point of the shielding curved surface is located on the involute starting point of the tooth root of the gear to be processed, and the length L of the shielding tooth is greater than the tooth width H of the gear to be processed.
Furthermore, the inner hole of the base is in clearance fit with a shaft lever of the gear to be processed, and the clearance is 0.15mm.
Further, the length L of the shielding teeth is 2mm larger than the tooth width H of the gear to be processed.
Furthermore, the shielding curved surface of the shielding tooth is attached to the tooth root of the gear to be processed, and the fit clearance is 0.1mm.
The utility model has the advantages that: simple structure and convenient operation. Will the utility model discloses the cartridge is treating processing the gear on, through the sand blowing technology, treats the clear protective area of acquisition that processing gear can be very easy to operating personnel can be accurate paint protective coating, finally provide the condition for satisfying the cyanide layer that meets the requirements.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a side view of the present invention.
Fig. 3 is a state diagram of the utility model of the suit on the gear to be processed.
Fig. 4 is an axial cross-sectional view of fig. 3.
Fig. 5 is a schematic end view of fig. 3.
Fig. 6 is an enlarged view at C in fig. 5.
In the figure: 1. the base, 2, hole, 3, shelter from the tooth, 4, shelter from the curved surface, 5, wait to process the gear, 6, axostylus axostyle, L is for sheltering from the length of tooth, and A is the excircle diameter of base, and B is the hole diameter of base, and H is the tooth width of waiting to process the gear.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, the oil pump gear root coating tool includes an annular base 1 and a plurality of identical strip-shaped shielding teeth 3. The base 1 and the shielding teeth 3 are integrated. The number of the shielding teeth 3 is consistent with the number of the teeth of the gear 5 to be processed. The shielding teeth 3 are uniformly distributed around the outer circumference of one side of the base 1. One end of the shielding tooth 3 is fixed on the end face of the base 1. The shielding teeth 3 are parallel to the axis of the base 1. The diameter A of the outer circle of the base 1 is consistent with the diameter of the base circle of the gear 5 to be processed, and the diameter of the outer circumference formed by the shielding teeth 3 is also consistent with the diameter of the base circle of the gear 5 to be processed. The diameter B of the inner hole 2 of the base 1 is matched with the shaft diameter of a shaft lever 6 of a gear 5 to be processed. As shown in fig. 1, 5 and 6, the shielding surface of the shielding tooth 3 is a curved surface, and the shape of the shielding curved surface 4 is consistent with the root arc shape of the gear 5 to be processed. The starting point of the cross section of the shading curved surface 4 is positioned on the starting point of the involute of the tooth root of the gear 5 to be processed. The length L of the shielding teeth 3 is larger than the tooth width H of the gear 5 to be processed.
As shown in fig. 3 and fig. 4, the utility model discloses when using, with base 1 suit on waiting to process the axostylus axostyle 6 of gear 5, base 1's terminal surface offsets with the terminal surface of waiting to process gear 5. The inner hole 2 of the base 1 is in clearance fit with a shaft lever 6 of a gear 5 to be processed, and the clearance is 0.15mm. Since the number of the shielding teeth 3 is identical to the number of teeth of the gear 5 to be processed. The shape of the shielding teeth 3 is consistent with the tooth root circular arc of the gear 5 to be processed. The blocking tooth 3 can be inserted into the circular arc of the tooth root of the gear 5 to be machined. The length L of the shielding teeth 3 is 2mm larger than the tooth width H of the gear 5 to be processed. The shielding curved surface 4 of the shielding tooth 3 is attached to the part below the starting point of the involute of the tooth root of the gear 5 to be processed, and the fit clearance is 0.1mm.
When machining the gear 5 to be machined: will the utility model discloses with wait to process 5 suit grafting of gear, make shelter from tooth 3 respectively with each root circular arc laminating of gear 5. Through the sand blowing process, an obvious boundary line is generated between the tooth surface and the tooth root circular arc of the gear 5 to be processed. This results in a clear protective zone for the operator to apply the protective coating. The utility model discloses simple structure, easy dismounting obtains the zone of protection clear after using, provides the condition for the accurate protective coating that paints.
Claims (4)
1. The utility model provides an oil pump gear tooth root coating frock which characterized in that: the device comprises an annular base and a plurality of same strip-shaped shielding teeth, wherein the base and the shielding teeth are integrated; the diameter A of the outer circle of the base is consistent with the diameter of the base circle of the gear to be machined, and the diameter B of the inner hole of the base is matched with the shaft diameter of the shaft lever of the gear to be machined; the number of the shielding teeth is consistent with that of the teeth of the gear to be processed, the shielding teeth are uniformly distributed around the outer circumference of one side of the base, one end of each shielding tooth is vertically fixed on the end face of the base, the axis of each shielding tooth is parallel to the axis of the base, and the diameter of the outer circumference formed by the shielding teeth is consistent with the diameter of a base circle of the gear to be processed; the shielding curved surface of the shielding tooth is consistent with the arc shape of the tooth root of the gear to be processed, the section starting point of the shielding curved surface is located on the involute starting point of the tooth root of the gear to be processed, and the length L of the shielding tooth is greater than the tooth width H of the gear to be processed.
2. The oil pump gear tooth root coating tool of claim 1, characterized in that: the inner hole of the base is in clearance fit with a shaft rod of the gear to be processed, and the clearance is 0.15mm.
3. The oil pump gear root coating tool according to claim 1, characterized in that: the length L of the shielding teeth is 2mm larger than the tooth width H of the gear to be processed.
4. The oil pump gear root coating tool according to claim 1, characterized in that: the shielding curved surface of the shielding tooth is attached to the tooth root of the gear to be processed, and the fit clearance is 0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222295223.8U CN218460033U (en) | 2022-08-31 | 2022-08-31 | Oil pump gear root coating auxiliary fixtures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222295223.8U CN218460033U (en) | 2022-08-31 | 2022-08-31 | Oil pump gear root coating auxiliary fixtures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218460033U true CN218460033U (en) | 2023-02-10 |
Family
ID=85140632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222295223.8U Active CN218460033U (en) | 2022-08-31 | 2022-08-31 | Oil pump gear root coating auxiliary fixtures |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218460033U (en) |
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2022
- 2022-08-31 CN CN202222295223.8U patent/CN218460033U/en active Active
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