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CN-118357714-B - Adjustable mounting seat of involute cam for fine gear grinding machine and adjusting method thereof

CN118357714BCN 118357714 BCN118357714 BCN 118357714BCN-118357714-B

Abstract

The invention belongs to the technical field of precision machining, and relates to an adjustable mounting seat for an involute cam for a fine gear grinding machine and an adjusting method thereof. The involute cam is characterized by comprising a cam mounting seat (2) for mounting the involute cam (1), wherein a cam adjusting plate (3) for adjusting the position of the involute cam (1) is arranged between the cam mounting seat and the bottom surface of the involute cam (1), and the tooth profile deviation of the involute cam (1) is reduced by adjusting the mounting positions of the involute cam (1) relative to the cam mounting seat (2) and the cam adjusting plate (3). The invention can precisely control the position precision of the involute cam (1) relative to the axis of the reference shaft sleeve (7). The invention greatly improves the precision of the tooth profile of the grinding involute cam of the fine gear grinding machine, and has high working efficiency, easy adjustment and convenient disassembly and assembly.

Inventors

  • Ling siying
  • YANG ZHENXIANG
  • PENG ZHIXIONG
  • XU HAOJIE
  • LIN QITONG
  • WANG FENGTAO

Assignees

  • 汕头大学

Dates

Publication Date
20260508
Application Date
20240412

Claims (8)

  1. 1. The adjustable mounting seat of the involute cam for the fine gear grinding machine is characterized by comprising a cam mounting seat (2) for mounting the involute cam (1), wherein a cam adjusting plate (3) for adjusting the position of the involute cam (1) is arranged between the cam mounting seat and the bottom surface of the involute cam (1); a cam weight plate (12) is arranged on a weight plate mounting surface (2-5) on the cam mounting seat (2), and an involute cam (13) for weight is arranged at the lower part of the cam weight plate (12); The cam adjusting device comprises a cam mounting seat, wherein shaft sleeve mounting holes (2-4) are respectively formed in the centers of two end faces (2-1) of the cam mounting seat, 2 reference shaft sleeves (7) are symmetrically arranged at two ends of each shaft sleeve mounting hole (2-4), 2 counterweight adjusting rings (8) are respectively arranged in the 2 reference shaft sleeves (7), V-shaped grooves (3-5) are formed in the middle of the top face (3-2) of the cam adjusting plate, trapezoid grooves are respectively formed in the middle of the bottom face of the involute cam (1), cam rotating shafts (6) are arranged between the trapezoid grooves and the V-shaped grooves (3-5), the diameter of each cam rotating shaft (6) is larger than the sum of the heights of the trapezoid grooves and the heights of the V-shaped grooves (3-5), a gap is reserved between the bottom face of the involute cam (1) and the top face (3-2) of the cam adjusting plate, the involute cam (1) can rotate around the axis of the cam rotating shafts (6), positioning plate connecting threaded holes (2-7) are respectively formed in the side faces (2-3) of the two cam mounting seat, and a set screw (11) penetrates through the positioning plate connecting threaded holes (2-7) respectively, and can be used for adjusting the left and right positioning plates (2) and the left positioning plates (4) to be arranged in a position adjusting mode.
  2. 2. The adjustable mount for an involute cam for a fine tooth grinding machine according to claim 1, characterized in that: A counterweight connecting threaded hole (2-8) is formed in the middle of the side surface (2-3) of the cam mounting seat and is used for connecting a counterweight part, and the counterweight part is used for adjusting the mass center of the whole adjustable mounting seat to be positioned at the axle center position of the axle sleeve assembly hole (2-4); involute cam (13) for counterweight, cam mounting seat (2), cam counterweight plate (12), the three are connected by screw (9); The left locating plate (4) and the right locating plate (5) are arranged on the cam mounting seat 2 through locating plate connecting screws (10).
  3. 3. The adjustable mounting seat of the involute cam for the fine gear grinding machine, which is disclosed in claim 2, is characterized in that the cam mounting seat (2) is a symmetrical structural part, and a shaft sleeve assembly hole (2-4) at the center of the cam mounting seat (2) is in interference fit with a reference shaft sleeve (7); the cam adjusting plate is characterized in that uniformly distributed connecting threaded holes (2-6) are formed in a cam adjusting plate mounting surface (2-2), a cam adjusting plate (3) is connected with an involute cam (1) through connecting threaded holes (2-6) in a bolt mode, a counterweight plate mounting surface (2-5) is arranged on the bottom surface of a cam mounting seat (2), uniformly distributed connecting threaded holes (2-6) are also formed in the cam adjusting plate mounting surface, a cam counterweight plate (12) is connected with a counterweight involute cam (13) through connecting threaded holes (2-6) in a bolt mode, a locating plate connecting threaded hole (2-7) is formed in a position, close to the cam adjusting plate mounting surface (2-2), of a side face (2-3) of the cam mounting seat so as to connect a left locating plate (4) with a right locating plate (5), a counterweight connecting threaded hole (2-8) is formed in the middle position of the side face (2-3) of the cam mounting seat and used for connecting counterweight parts, and the center of mass of the whole adjustable mounting seat is adjusted to be located at the axle center position of a shaft sleeve assembling hole (2-4).
  4. 4. The adjustable mounting seat of the involute cam for the fine gear grinding machine is characterized in that the cam adjusting plate (3) is a symmetrical plate-shaped part and is used for adjusting the horizontal position of the involute cam (1), the cross section (3-1) of the cam adjusting plate is of a trapezoid structure, the cam rotating shaft (6) is a standard cylinder and is arranged on a V-shaped groove (3-5), the intersection line of two inclined planes of the V-shaped groove (3-5) is parallel to the cam rotating shaft (6) and is in line contact with the two inclined planes to form a sliding rotary shaft system, the cam adjusting plate (3) is used as a transition piece and is matched with a connecting threaded hole (2-6) in a cam adjusting plate mounting surface (2-2), the diameter of the locating through hole (3-6) is larger than that of the connecting threaded hole (2-6), the axis of the cam rotating shaft (6) is parallel to a cam adjusting plate supporting surface (3-4), the involute cam (1) is matched with the cam rotating shaft (3-4), and the cam adjusting plate (2) is mounted on the cam adjusting plate (2).
  5. 5. The adjustable mounting seat of the involute cam for the fine gear grinding machine according to claim 1 or 4 is characterized in that a left positioning plate (4) and a right positioning plate (5) are symmetrical L-shaped parts of two parts, a left positioning plate supporting surface (4-2) and a right positioning plate supporting surface (5-2) are used as guide surfaces for fine adjustment of a cam adjusting plate (3), the relative positions of the cam adjusting plate (3) and the cam mounting seat (2) in the axial direction of a cam rotating shaft (6) are assisted, a plurality of left positioning plate through holes (4-3) and right positioning plate through holes (5-3) are symmetrically arranged at the corresponding positions of the left positioning plate connecting surface (4-1) and the right positioning plate connecting surface (5-1), positioning plate connecting screws (10) respectively penetrate through the left positioning plate through holes (4-3) and the right positioning plate through holes (5-3), the left positioning plate (4) and the right positioning plate (5) are respectively connected to the side surfaces (2-3) of the two cam mounting seats, locking holes (4-3) are arranged at positions close to the left positioning plate connecting surface (4-3) and the right positioning plate connecting surface (5-1) and the right positioning plate connecting surface (5-3), the set screw (11) passes through the left locating plate locking hole (4-4) and the right locating plate locking hole (5-4) to locate the cam adjusting plate (3) and adjust the horizontal position of the correction cam adjusting plate (3).
  6. 6. The adjustable mounting seat of the involute cam for the fine gear grinding machine according to claim 5 is characterized in that the reference shaft sleeve (7) is a set of two stepped layer type annular parts, the inner annular surface (7-4) can be assembled with the reference shaft through the dense bead shaft sleeve to form a rotary shaft system of the adjustable mounting seat, and the diameter of a large annular surface (7-1) of the reference shaft sleeve (7) is larger than that of a small annular surface (7-2) to form a boss positioning structure.
  7. 7. The adjustable mounting seat of the involute cam for the fine gear grinding machine, which is disclosed in claim 6, is characterized in that a guide ring (7-3) is arranged at the end face of a reference shaft sleeve (7) close to a small ring surface (7-2), the outer diameter of the guide ring (7-3) is smaller than that of the small ring surface (7-2), the whole small ring surface (7-2) is assembled in a shaft sleeve assembly hole (2-4) in an interference manner, the large ring end faces (7-5) of the two reference shaft sleeves (7) are mutually parallel and coaxial with an inner ring surface (7-4), a counterweight adjusting ring (8) is a set of annular parts with two parts, a ring groove (8-4) with a trapezoid cross section is formed in the outer ring surface (8-1), a locking hole (8-6) is formed in the bottom of the ring groove (8-4), a counterweight (8) is assembled on the large ring surface (7-1) of the two reference shaft sleeves (7) through a set screw arranged in the locking hole (8-6), the end faces (8-3) of the adjusting ring are tightly attached to the end faces (2-1) of the cam mounting seat, the counterweight (8-5) can be placed in the position of the adjustable positioning seat from the position of the adjustable positioning seat, and the position of the adjustable positioning seat can be adjusted by the position of the center of the counterweight.
  8. 8. The method for adjusting an adjustable mount for an involute cam for a fine tooth grinding machine according to claim 7, characterized by comprising the steps of: Measuring an involute cam (1), and calculating the position deviation of the circle center of an involute base circle of the involute cam (1) relative to the axis of a reference shaft sleeve (7); Step two, adjusting the installation positions of the involute cam (1) relative to the cam installation seat (2) and the cam adjusting plate (3) to reduce the tooth profile deviation of the involute cam (1); detecting the position deviation of the circle center of the involute base circle of the involute cam (1) relative to the axis of the reference shaft sleeve (7) after adjustment, and repeating the second step until the circle center of the involute base circle of the involute cam (1) coincides with the axis of the reference shaft sleeve (7); Establishing a plane rectangular coordinate system which takes the axis of the reference shaft sleeve (7) as an origin, takes a straight line parallel to the cam adjusting plate mounting surface (2-2) of the cam mounting seat (2) as an X axis and takes a straight line perpendicular to the cam adjusting plate mounting surface (2-2) of the cam mounting seat (2) as a Y axis, measuring the positions of an involute starting point, a cam highest point and an involute ending point on the involute cam (1), and calculating the position of the center of an involute base circle of the involute cam (1), thereby calculating the position deviation of the involute cam (1) and the axis of the reference shaft sleeve (7); according to the position of the center of the involute base circle on the involute cam (1) calculated in the first step, adjusting the involute cam (1) to enable the center of the involute base circle to coincide with the axis of the reference shaft sleeve (7), wherein the position adjustment of the involute cam (1) comprises translation adjustment and rotation adjustment; the translation adjustment is that the initial involute of the involute cam (1) translates along the phase beta by a distance e, wherein the translation distance e comprises three displacement modes that the initial involute of the involute cam (1) moves upwards and downwards along the phase beta along the Y axis, and the initial involute of the involute cam (1) horizontally moves along the phase beta along the X axis; When the circle center of an involute base circle of the involute cam (1) is lower than the axis of the reference shaft sleeve, a gasket is added at the horizontal plane of a counterweight plate mounting surface (2-5) of a cam mounting seat (2), so that the involute cam (1) moves upwards along the Y axis, and the translation distance e is determined by the thickness T1 of the gasket, wherein the relation is that e=T1, and beta=90 degrees; When the circle center of an involute base circle of the involute cam (1) is higher than the axis of the reference shaft sleeve, the involute cam (1) moves downwards along the Y axis by grinding a cam adjusting plate mounting surface (2-2) of a cam mounting seat (2), and the translation distance e is determined by a grinding depth T2, wherein the relation is that e=T2, and beta= -90 degrees; When the involute base circle center of the involute cam (1) and the axis of the reference shaft sleeve (7) deviate horizontally, as the screw (9) moves in the positioning through hole (3-6) of the cam adjusting plate (3), the position of the cam adjusting plate (3) is moved along the X axis, so that the involute cam (1) moves horizontally, the cam adjusting plate (3) is fixed by the set screw (11) on the left positioning plate (4) and the right positioning plate (5) and the translation distance e is determined by the displacement T3 of the cam adjusting plate (3), and the relation is that e=T3, beta=0 DEG or beta approximately equal to 180 DEG; The rotation adjustment is that the involute cam (1) rotates by an angle theta around the axis p (x, y) of the rotating shaft of the initial involute cam (1), and can be decomposed into the rotation adjustment of the involute cam (1) around the center of the involute base circle and the translation adjustment of the involute cam (1) along the phase beta by a distance e, wherein the curve of the involute cam (1) after the involute rotates around the center of the involute base circle is still a standard involute, and only the initial expansion angle lags by the angle theta, so that the position transformation of the center of the involute base circle is not influenced; By calculating the axis p (x, y) of the rotating shaft of the involute cam (1) and the cosine theorem, the equivalent translation distance e and the phase beta, e= (2× (x 2 +y 2 ）×(1-cos((θ))) 1/2 , beta = pi-arctan (y/x) - (pi- |theta|)/2; And thirdly, measuring the positions of an involute starting point, a highest point and an involute ending point on the adjusted involute cam (1) to obtain the position of the center of an involute base circle, verifying whether the adjustment of the involute cam (1) meets the precision requirement, and repeating the second step to continuously adjust the installation position of the involute cam (1) until the center of the involute base circle of the involute cam (1) coincides with the axis of the reference shaft sleeve (7) if the adjustment of the involute cam (1) does not meet the precision requirement.

Description

Adjustable mounting seat of involute cam for fine gear grinding machine and adjusting method thereof Technical Field The invention belongs to the technical field of precision machining, and relates to an adjustable mounting seat for an involute cam for a fine gear grinding machine and an adjusting method thereof. Background Gears are key basic components with wide range, and are almost applied to various fields of national economy. Currently, the gear industry has become the industry with the greatest regulation in chinese mechanical foundations. With the high-speed development of national economy, the requirements of people on gear precision are increasingly improved. The high-precision gear comprises a precision gear and an ultra-precision gear, is widely applied to the fields of industry and national defense, and is particularly applied to instruments, automatic control devices and high-speed devices. The processing technology of the involute gear can be divided into a forming method and a generating method according to the forming method of the gear, and can be divided into gear hobbing, gear milling, gear shaping, gear carding, gear shaping, gear shaving, gear honing, gear grinding, gear extrusion and the like according to the processing method, wherein the gear grinding is the most effective processing method of the precision gear in the working precision and the obtained surface quality of the common gear processing method. The grinding method can be classified into conical grinding wheel grinding teeth, butterfly grinding wheel grinding teeth, large plane grinding wheel grinding teeth, worm grinding wheel grinding teeth, forming grinding wheel grinding teeth and the like according to the types of grinding wheels. The large-plane grinding wheel has high grinding precision and is commonly used for grinding and processing high-precision standard gears, gear shaping cutters and gear shaving cutters. The working principle is that the gear is processed by using the principle of meshing the rack and the gear and using the working surface of the large-plane grinding wheel as one tooth surface of an imaginary rack by using a generating method. The method includes the steps of forming the generating motion by pure rolling of a steel belt-rolling disc, such as SRS405 numerical control large-plane grinding wheel gear shaving cutter gear grinding machine developed by Gleason group, domestic Y7432 gear grinding machine and the like, forming the generating motion by an involute cam-stop block, such as NationaI Tool type of gear grinding machine in the United states, domestic Y7125 type of gear grinding machine and Y7431 type of gear grinding machine in the United states, generating the involute by an electronic generating method, and driving and controlling the device by dividing the pure rolling into two proportional rotation and translation respectively through a rotary stepping motor, a linear stepping motor and a grating system. Because the steel belt is a flexible body, the rigidity of the mechanism type generating system is low, and the thickness precision of the steel belt is not easy to ensure, so that the generating precision of the roller-steel belt type involute generating system is difficult to improve. Due to the large sources of errors in the electron generating system and the inherent weaknesses (drift, hysteresis, susceptibility to interference) of the electrical signals, the accuracy of the involute machined using electron generating methods is relatively low. The precision of the involute of the gear machined by a common electronic generating method is 3-2 levels in ISO 1328-1:2013. According to the current processing and numerical control technology level, the electronic generating method is difficult to be qualified for processing the high-grade involute template. The generating precision of the generating system mainly comes from the surface shape precision and the installation precision of the profiling-involute cam. The generating system has simple structure, higher rigidity and less error source. Although the involute machined by the involute cam-baffle type gear grinding machine belongs to secondary forming, the involute cam with high precision can be machined by utilizing one-step forming devices such as a roller-guide rail generating mechanism, and compared with a roller-steel belt type generating system, the involute cam-baffle type generating system has no flexible body, so that the device has higher structural rigidity and higher machining precision of the involute. The involute forming of the domestic standard gear, the high-precision gear shaper and the gear shaving cutter is mostly adopted by the method. The cam-baffle gear grinding machine processing shaping gear adopts a grinding wheel trimmer to shape a grinding wheel, and the grinding processing is completed by a generating method. Firstly designing a template for processing the grinding wheel according to the profile modificat