阅读说明：本技术 具有两种基圆参数的1级精度齿轮渐开线样板 (1-grade precision gear involute sample plate with two base circle parameters ) 是由 袁高峰 凌明 于 2020-06-05 设计创作，主要内容包括：本发明属于精密齿轮加工与测试技术领域,涉及一种用于齿轮渐开线量值传递基准的具有两种基圆参数的1级精度齿轮渐开线样板,其结构包括：基圆A左齿面、基圆A右齿面、基圆B左齿面、基圆B右齿面、中心孔、上端面、上圆柱面、下端面、下圆柱面、肋板和减重槽。本发明提供的具有两种基圆参数的1级精度齿轮渐开线样板,在一个样板基体上加工有两种类型且左右对称的四个渐开线齿廓,且两种基圆参数的圆心和样板的质心重合。使用本发明提供的具有两种基圆参数的1级精度齿轮渐开线样板,一件即可满足齿轮渐开线样板检定规程对齿轮渐开线测量仪器的校准与检定需求,具有质量平衡、使用方便、两种基圆基准统一的优点,具有良好的市场应用前景。(The invention belongs to the technical field of precision gear processing and testing, and relates to a 1-grade precision gear involute sample plate with two base circle parameters, which is used for a gear involute quantity value transmission reference, and structurally comprises: the tooth surface comprises a base circle A left tooth surface, a base circle A right tooth surface, a base circle B left tooth surface, a base circle B right tooth surface, a central hole, an upper end surface, an upper cylindrical surface, a lower end surface, a lower cylindrical surface, a rib plate and a weight reduction groove. The invention provides a 1-grade precision gear involute sample plate with two base circle parameters, wherein four involute tooth profiles which are of two types and are bilaterally symmetrical are processed on a sample plate base body, and the centers of circles of the two base circle parameters are coincided with the center of mass of the sample plate. The 1-grade precision gear involute sample plate with two base circle parameters provided by the invention can meet the calibration and verification requirements of a gear involute measuring instrument by a gear involute sample plate verification procedure, has the advantages of balanced quality, convenience in use and unified reference of two base circles, and has good market application prospect.)

1. The utility model provides a 1 level precision gear involute model board with two kinds of base circle parameters which characterized in that, it has two kinds and bilateral symmetry's four involute flank profiles to process on a model base member: a base circle A left tooth surface (1), a base circle A right tooth surface (2), a base circle B left tooth surface (3) and a base circle B right tooth surface (4); all the tooth profiles give out a designed involute profile from a base circle, and the designed development length of the involute is not less than the recommended development length in the national standard GB/T6467-2010 of the gear involute template; the difference of the base circle radiuses corresponding to the two types of tooth profiles is not less than 80 mm;

the centers of the two base circle parameters coincide with the center of mass of the sample plate, a reference hole (5) is formed in the center of the circle along the tooth width direction in the axis direction, and an upper reference outer cylindrical surface (6), an upper reference end surface (7), a lower reference outer cylindrical surface (8) and a lower reference end surface (9) which are symmetrical are arranged on the upper side and the lower side of the reference hole (5); the upper and lower reference outer cylindrical surfaces (6, 8) are radial reference references when the gear involute sample plate is processed, regulated and measured, and the lower reference surface (9) is an axial reference of the gear involute sample plate.

2. A gear involute template with 1 st order precision with two base circle parameters according to claim 1, wherein the gear involute template is a monolithic structure with a reference hole (5).

3. A method for mounting and using a grade 1 precision gear involute template with two base circle parameters as claimed in claim 1 or 2, wherein the gear involute template is mounted on a template mandrel by an eccentric dense-ball shaft sleeve, the eccentric dense-ball shaft sleeve with specific eccentric parameters is manufactured, the difference of the inclination deviation of the same common normal tooth profile corresponding to the middle base circle parameters is adjusted to be below 0.1 μm, and then the inclination deviation of the tooth profile of four tooth surfaces is compensated to the respective design base circle and the base circle parameters are given; the position of the gear involute template relative to the mounting mandrel is not changed when the gear involute template is used.

Technical Field

The invention belongs to the technical field of precision gear machining and testing, and relates to a 1-grade precision gear involute sample plate with two base circle parameters, which is used for a gear involute quantity value transmission reference.

Background

The gear involute sample plate is used as a standard measuring instrument of an involute measuring instrument and is mainly used for transmitting a reference value of an involute, determining and correcting a display value error of the gear involute measuring instrument and the like. Utility model patent (ZL 201020678898) discloses a circular arc non-involute profile model and (ZL 201120083865) discloses a two ball non-gear involute model, replaces involute with the circular arc on the high accuracy spheroid and carries out the precision calibration to gear measurement center. The invention patent (ZL 201210051093) discloses an involute gear waviness sample plate for evaluating a filtering algorithm of a gear measuring instrument. The invention patent (ZL 201310057364) discloses a multifunctional involute gear sample plate, wherein a special gear sample plate with harmonic waves, tooth profile drum errors, tooth profile inclination deviations and base pitch deviations is processed on the tooth surface of a gear, and the influence of filtering on tooth profile evaluation in the tooth profile evaluation process can be verified. The invention patent (ZL 201510091994) discloses a high-precision radial adjustable gear involute template and an adjusting method thereof, wherein the difference of tooth profile inclination deviation of the gear involute template is compensated by adjusting the radial position of the gear involute template relative to a measuring mandrel, so that the consistency of the base circle radius of each tooth surface of the gear involute template is ensured. The invention patent (ZL 201610847011) discloses a bull gear involute template, wherein a sector base circle block and the gear involute template are integrated, the bull gear involute template has a compact structure and no rotation center in the structure, and is more suitable for calibration of a three-coordinate CMM measuring center for measuring a bull gear and magnitude transfer of a bull gear involute. The invention patent (ZL 201711393983) discloses a self-installation reference equal common normal line gear involute sample plate, involutes of left and right special-shaped tooth surfaces of the sample plate have the same common normal line and a uniform expansion base circular arc, and ultra-precision machining and testing of the gear involute sample plate are facilitated. A publication patent (CN 201910681693) discloses a biaxial arc type large-size involute sample plate, wherein an approximate curve arc is used for replacing a standard involute of a bull gear, so as to provide a new idea for establishing a large-size gear involute value transmission system. The disclosed involute or involute gear sample plate can only provide one base radius parameter, and the requirement of the involute gear sample plate verification regulation JJG 332-. The national standard GB/T6467-. At present, most of the existing gear involute templates in the market are low-precision grade templates with a single base circle parameter or two base circle parameters, and are manufactured by referring to the abandoned gear involute template national standard GB/T6467-2001, and are facing updating. The 1-grade precision gear involute sample plate with two base circle parameters still belongs to the domestic and foreign blank.

Disclosure of Invention

In order to facilitate the verification and calibration of the gear involute measuring instrument, the invention provides a 1-grade precision gear involute sample plate with two base circle parameters.

The specific technical scheme is as follows:

a1-level precision gear involute sample plate with two base circle parameters is characterized in that four involute tooth profiles which are two types and are bilaterally symmetrical are processed on a sample plate base body, all the tooth profiles give out a designed involute profile from a base circle, and the designed development length of an involute is not less than the recommended development length of the gear involute sample plate in the national standard GB/T6467-2010; the difference of the base circle radiuses corresponding to the two types of tooth profiles is not less than 80 mm;

the 1-level precision gear involute template with two base circle parameters is characterized in that the centers of the two base circle parameters coincide with the center of mass of the template, a reference hole is arranged at the center of the template along the tooth width direction in the axial direction, and an upper reference outer cylindrical surface, an upper reference end surface, a lower reference outer cylindrical surface and a lower reference end surface are arranged at the upper side and the lower side of the reference hole; the upper and lower cylindrical reference surfaces are radial reference references in the process of machining, regulating and measuring the gear involute sample plate, and the lower reference surface is an axial reference of the gear involute sample plate;

the 1-grade precision gear involute sample plate with two base circle parameters is of an integral structure with a reference hole, is vertically symmetrical, is made of GCr15 material or material with equivalent performance, and is subjected to quenching and liquid nitrogen cryogenic treatment, wherein the tooth surface hardness is not lower than HRC60, and the non-finished surface is subjected to rust prevention treatment.

The installation and use method of the 1-level precision gear involute sample plate with two base circle parameters comprises the steps of installing the gear involute sample plate on a sample plate mandrel by adopting an eccentric dense ball shaft sleeve, synchronously adjusting the difference value of the tooth profile inclination deviation of the left tooth surface and the right tooth surface corresponding to two base circles to be less than 0.1 mu m by manufacturing the eccentric dense ball shaft sleeve with specific eccentric parameters, then compensating the tooth profile inclination deviation of the four tooth surfaces to the respective designed base circle and giving out base circle parameters; the position of the gear involute template relative to the mounting mandrel is not changed when the gear involute template is used.

The invention has the beneficial effects that the 1-grade precision gear involute sample plate with two base circle parameters is provided with four involute tooth profiles which are of two types and are bilaterally symmetrical on a sample plate base body, and the centers of the two base circle parameters are coincided with the mass center of the sample plate. The gear involute sample plate with two base circle parameters provided by the invention can meet the requirement of detecting a gear measuring instrument in a gear involute sample plate detection procedure JJJG 332-.

Drawings

Figure 1 is a 1-step precision gear involute master with two base circle parameters.

In the figure: 1 base circle A left tooth surface; 2 base circle A right tooth surface; 3 a base circle B left tooth surface; 4 base circle B right tooth surface; 5 a reference hole; 6, an upper reference end surface; 7, an upper reference outer cylindrical surface; 8, a lower reference end surface; 9 lower reference outer cylindrical surface; 10 rib plates; 11 weight reduction slots.

Figure 2 is a schematic illustration of the installation of a 1 st order precision gear involute master with two base circle parameters on a cylindrical master mandrel with a pillow block.

Detailed Description

The design idea and the structural characteristics of the gear involute template are explained by taking two base circle parameter 1-grade precision gear involute templates with the base circle A radius of 60cos20 degrees and the base circle B radius of 150cos20 degrees as examples.

1 level precision gear involute model board with two kinds of base circle parameters, the structure includes: the tooth surface comprises a base circle A left tooth surface 1, a base circle A right tooth surface 2, a base circle B left tooth surface 3, a base circle B right tooth surface 4, a reference hole 5, an upper reference end surface 6, an upper reference outer cylindrical surface 7, a lower reference end surface 8, a lower reference outer cylindrical surface 9, a rib plate 10 and a weight reduction groove 11;

the left tooth surface 1 of the base circle A and the right tooth surface 2 of the base circle A are different-side tooth surfaces with the same base circle parameter and design size and symmetrical structures, and the left tooth surface 3 of the base circle B and the right tooth surface 4 of the base circle B are different-side tooth surfaces with the same base circle parameter and design size and symmetrical structures. The design development lengths of the four tooth surfaces are more than 6 percent longer than the recommended development length in the national standard GB/T6467-2010 of the gear involute template, and the measurement tooth profiles of the gear involute template are all given from the base circle; because the involute close to the base circle is very sensitive to the development length of the involute, in order to ensure the effective development length of the involute sample plate of the gear and prevent the loss of the length of the involute caused by chamfering or processing collapse angle at the tooth root part of the involute sample plate of the gear, the involute of four tooth surfaces is designed from the base circle and the involute on the base circle extends 1-2 mm to the inside of the base circle along the tangential direction;

the thickness of the gear involute sample plate is 24mm, and the thickness of the ribbed plate is 8 mm; in order to enable the mass center of the gear involute template to pass through the axis of the reference hole 5, the tooth tops of the left tooth surface 1 of the base circle A and the right tooth surface 2 of the base circle A are 175mm away from the axis of the reference hole 5, the tooth top radius of the left tooth surface 3 of the base circle B and the tooth top radius of the right tooth surface 4 of the base circle B are 91.59mm, and the depth of the weight-reducing groove 11 is 8 mm;

in order to obtain high manufacturing precision and meet the precision requirement of a 1-level sample plate in the national standard GB/T6467-2010 of the gear involute sample plate, the gear involute sample plate with two base circle parameters of 1-level precision meets the following requirements: the roundness error of the reference hole 5 is not more than 0.5 mu m, the cylindricity error is not more than 1 mu m, and the surface roughness is not more than 0.2 mu m; the coaxiality error of the upper reference outer cylindrical surface 7 and the lower reference outer cylindrical surface 9 relative to the reference hole 5 is not more than 1 mu m, the surface roughness is not more than 0.4 mu m, and the effective width is 3-6 mm; the perpendicularity error of the upper reference end face 6 and the lower reference end face 8 relative to the axis of the reference hole 5 is not more than 1 mu m, and the surface roughness is not more than 0.2 mu m; the upper reference outer cylindrical surface 7 and the lower reference outer cylindrical surface 9 are used as reference surfaces during processing, regulation and measurement; the roughness of the base circle A left tooth surface 1, the base circle A right tooth surface 2, the base circle B left tooth surface 3 and the base circle B right tooth surface 4 is not more than 0.2 mu m, and the effective width is not less than 6 mm;

the involute sample plate of the gear with 1-level precision and two base circle parameters is integrally designed, GCr15 or a material with equivalent performance is selected, quenching and liquid nitrogen cryogenic treatment are carried out, the hardness of the involute cylindrical surface is not lower than HRC60, and the non-finish machining surface is subjected to chrome plating and other measures for rust prevention.

When the gear involute sample plate with two base circle parameters is used, the gear involute sample plate with two base circle parameters is installed on a cylindrical sample plate mandrel with a shaft platform by adopting an eccentric dense ball shaft sleeve for precise positioning provided by the invention patent (ZL 201510560861), the difference value of the tooth profile inclination deviation of the left tooth surface and the right tooth surface corresponding to the two base circles is synchronously adjusted to be less than 0.1 mu m by manufacturing the eccentric dense ball shaft sleeve with a specific specification, and then the tooth profile inclination deviation of the four tooth surfaces is compensated to the respective design base circle and the base circle parameters are given; the position of the gear involute template relative to the mounting mandrel is not changed when the gear involute template is used.