CN119077626A - A normal dynamic deflection dressing method for a gear cutting wheel - Google Patents

Abstract

The invention discloses a dressing wheel normal dynamic deflection dressing method of a turning gear grinding wheel, which adopts a single-arc dressing wheel to carry out dressing of a turning gear grinding wheel profile, in the dressing process, the circle centers of arc heads positioned at dressing contact points on the single-arc dressing wheel are controlled to move equidistantly along the theoretical surface of the turning gear grinding wheel in one direction, and meanwhile, the single-arc dressing wheel is controlled to do swinging motion around the circle centers of arc heads positioned at the dressing contact points on the whole, so that a dynamic variation deflection angle is formed between a rotation plane formed by the circle centers of the arc heads and a normal plane positioned at the dressing contact points on the turning gear grinding wheel profile when the single-arc dressing wheel rotates around an axis of the single-arc dressing wheel, and in the dressing process, the deflection angle is gradually reduced from a maximum forward deflection angle to a zero deflection angle, and is gradually increased from the zero deflection angle to a maximum reverse deflection angle. The invention improves the service life of the single-arc dressing wheel and the dressing precision of the turning gear knife grinding wheel.

Description

Dressing wheel normal dynamic deflection type dressing method for turning gear knife grinding wheel

Technical Field

The invention relates to the technical field of grinding wheel dressing, in particular to a dressing wheel normal dynamic deflection dressing method of a turning gear knife grinding wheel.

Background

The turning gear grinding wheel is a tool for grinding a turning gear and is a generating grinding wheel. In order to improve the precision and grinding performance of the generated grinding wheel, it is necessary to finish it. At present, the profile trimming of a grinding wheel generated by a turning gear mainly comprises two types of diamond trimming pen profiling trimming and diamond trimming wheel forming trimming. The diamond dressing pen has the same dressing shape as turning, the dressing pen is fixed, the dressing pen is in frequent contact with the grinding wheel, the diamond abrasion is quick, the service life of the dressing pen is short, the grinding wheel profile dressing precision is low, the application in the forming grinding aspect is not more, the diamond dressing wheel has the same dressing shape as the excircle cutting grinding, the dressing wheel and the grinding wheel rotate at high speed, and the dressing wheel has more diamond particles on the surface, so that the abrasion of the dressing wheel is relatively slower compared with the dressing pen, and the diamond dressing pen is widely applied in the forming grinding field. Although the diamond particles on the surface of the dressing wheel are worn slowly, the surface precision of the dressing wheel is gradually reduced in the dressing process, so that the surface precision of the dressed grinding wheel is gradually reduced, and the precision of the ground part and the stability of the grinding performance are affected, therefore, the traditional ceramic bond diamond dressing wheel has obvious defects in molding and dressing, and needs to be further perfected and improved.

In the prior art, chinese patent publication No. CN102765056B discloses a trimmer of CBN grinding wheel of bearing inner race groove, which adopts a diamond disc rotation swinging mode to trim the profile of the CBN grinding wheel. However, the diamond disc used as the dressing wheel is always contacted with the grinding wheel to be dressed by utilizing the vertex of the diamond disc in the dressing process, so that the accuracy of the diamond disc is reduced rapidly after the diamond disc is used for a period of time, and the service life of the diamond disc is greatly reduced.

In order to reduce the problem of precision degradation caused by rapid wear of the dressing wheel, the prior art also discloses an invention patent with the grant publication number of CN109664201B, which is named as a grinding wheel shaping and dressing method, and the method is used for carrying out rough dressing on the grinding wheel to be dressed by using a first dressing area selected from old areas of the dressing wheel which are used as a dressing wheel working area in a rough dressing stage, and using a second dressing area selected from new areas of the dressing wheel which are not used as a dressing wheel working area in a fine dressing stage, wherein a novel surface on the circumference of the dressing wheel is beneficial to ensuring and improving the surface dressing precision of the grinding wheel to be dressed. However, the grinding wheel forming and dressing method has the following defects that the dressing wheel only rotates for 1 week in the service life, after the dressing wheel rotates for 1 week, the dressing wheel basically loses precision and is scrapped and is not used, so that the number of times of using the dressing wheel is limited greatly, the service life of the dressing wheel is not high, in addition, because of the dynamic change problem of a first dressing area and a second dressing area on the dressing wheel, if equipment is powered off or restarted after the equipment is shut down, the dressing wheel is not easy to realize the accurate positioning in the circumferential direction in the next dressing, thereby influencing the subsequent dressing precision.

Disclosure of Invention

In order to solve the problems, the invention provides a dressing wheel normal dynamic deflection type dressing method of a turning gear grinding wheel, which aims to improve the service life of a single-arc dressing wheel and the dressing precision of the turning gear grinding wheel. The specific technical scheme is as follows:

A dressing wheel normal dynamic deflection type dressing method of a turning gear grinding wheel adopts a single-arc dressing wheel to carry out dressing of a turning gear grinding wheel profile, the single-arc dressing wheel is driven to carry out rotary motion around an axis of the single-arc dressing wheel during dressing, the single-arc head of the single-arc dressing wheel is enabled to be in contact with a surface to be dressed of the turning gear grinding wheel, a dressing contact point between the single-arc dressing wheel and the turning gear grinding wheel is formed, in the dressing process, the circle center of an arc head, located at the dressing contact point, of the single-arc head of the single-arc dressing wheel moves equidistantly along one direction along the theoretical surface of the turning gear grinding wheel, and meanwhile, the circle center of the arc head, located at the dressing contact point, of the single-arc dressing wheel is controlled to carry out swinging motion around the circle center of the dressing contact point, so that a rotary plane formed by the circle center of the single-arc head during the single-arc dressing wheel rotates around the axis of the single-arc head and a normal plane, located at the dressing contact point, of the turning gear grinding wheel form a dynamically changing swing angle, in the dressing process, the swing angle is gradually reduced from a maximum forward swing angle to a zero swing angle, and then gradually increases from a maximum reverse swing angle.

In the invention, the single-arc dressing wheel gradually reduces from the maximum forward deflection angle to the zero deflection angle, and then gradually increases from the zero deflection angle to the maximum reverse deflection angle to form a forward dynamic deflection period, and one forward movement dressing of the single-arc dressing wheel on the serrated knife grinding wheel is completed through the one forward dynamic deflection period.

As a further improvement of the invention, after the circle centers of the arc heads on the single arc trimming wheel, which are positioned at the trimming contact points, are equidistantly moved along one direction along the theoretical surface of the turning gear grinding wheel, the circle centers of the arc heads on the single arc trimming wheel, which are positioned at the trimming contact points, are also controlled to be equidistantly moved along the other direction along the theoretical surface of the turning gear grinding wheel, and the deflection angle is gradually reduced from the maximum reverse deflection angle to the zero deflection angle and is gradually increased from the zero deflection angle to the maximum forward deflection angle in the process of equidistant movement in the opposite direction.

According to the invention, the single-arc dressing wheel gradually reduces from the maximum reverse swing angle to the zero swing angle, and then gradually increases from the zero swing angle to the maximum forward swing angle to form a reverse dynamic swing period, and one-time reverse movement dressing of the single-arc dressing wheel on the serrated knife grinding wheel is completed through the reverse dynamic swing period.

In the invention, the forward dynamic deflection period and the reverse dynamic deflection period form a complete dynamic deflection period, and the forward and reverse movement combined dressing of the single-arc dressing wheel on the serrated knife grinding wheel is completed through the complete dynamic deflection period.

Preferably, the dressing of the turning gear grinding wheel by the single-arc dressing wheel is completed by continuously implementing a plurality of complete dynamic deflection cycles.

As a preferable scheme of the invention, in the process that the circle centers of the arc heads positioned at the trimming contact points on the single arc heads of the single arc trimming wheel move equidistantly along one direction along the theoretical type surface of the turning gear grinding wheel, or in the process that the circle centers of the arc heads positioned at the trimming contact points on the single arc heads of the single arc trimming wheel move equidistantly along the other direction along the theoretical type surface of the turning gear grinding wheel, the trimming of the turning gear grinding wheel by the single arc trimming wheel is completed by continuously implementing a plurality of complete dynamic deflection periods.

According to the invention, the turning gear grinding wheel is arranged on a turning gear grinding wheel rotating driving shaft, the turning gear grinding wheel rotating driving shaft is arranged on a double-shaft numerical control moving unit with two numerical control moving shafts, the single-arc trimming wheel is arranged on a grinding wheel trimmer, the grinding wheel trimmer is provided with a numerical control rotating shaft and a trimming wheel rotating driving shaft which is arranged on the numerical control rotating shaft and is used for driving the single-arc trimming wheel to rotate around the axis of the grinding wheel trimmer, and the single-arc trimming wheel is arranged on the trimming wheel rotating driving shaft of the grinding wheel trimmer, and the equidistant movement of the circular arc head of the single-arc trimming wheel along the theoretical surface of the turning gear grinding wheel and the normal deflection of the single-arc trimming wheel are realized through the linkage of the two numerical control moving shafts of the double-shaft numerical control moving unit and the numerical control rotating shaft of the grinding wheel trimmer.

The numerical control movable shafts are used for realizing equidistant movement of the arc heads of the single-arc finishing wheel along the theoretical profile of the turning gear grinding wheel, and the numerical control rotary shaft is used for realizing normal deflection of the single-arc finishing wheel.

Preferably, the single-arc trimming wheel realizes that the deflection angle gradually decreases from a maximum positive deflection angle to a zero deflection angle and then gradually increases from the zero deflection angle to a maximum negative deflection angle in the trimming process in a mode of uniformly swinging around the circle center of the circular arc head at the trimming contact point, and the deflection angle gradually decreases from the maximum negative deflection angle to the zero deflection angle and then gradually increases from the zero deflection angle to the maximum positive deflection angle in the trimming process in a mode of uniformly swinging around the circle center of the circular arc head at the trimming contact point.

As a further improvement, the dressing wheel normal dynamic deflection dressing method of the turning gear grinding wheel also adopts a dynamic variable deflection compensation method to carry out periodic detection and online wear compensation on the uneven wear of the arc head of the single-arc dressing wheel, and the dynamic variable deflection compensation method comprises the following steps:

(1) The abrasion detection is carried out by periodically detecting after each finishing wheel is used for a prescribed time, and the abrasion data of the arc heads of the single arc finishing wheel are obtained;

(2) The method comprises the steps of dividing the wear area, namely judging whether the wear uniformity of the arc head of the single-arc finishing wheel is generally qualified according to the wear data condition of the arc head of the single-arc finishing wheel, if not, dividing the wear area of the arc head into uniform wear areas with uniform wear amount, excessive wear areas with more wear amount and insufficient wear areas with less wear amount;

(3) In the whole process of trimming the turning gear grinding wheel profile by using the arc head of the single arc trimming wheel, different deflection speeds are set for different wear areas of the single arc trimming wheel, which participate in the turning gear grinding wheel profile trimming, wherein the uniform wear areas of the arc head of the single arc trimming wheel adopt the same deflection speed used before the abrasion detection when participating in the turning gear grinding wheel profile trimming, the excessive wear areas of the arc head of the single arc trimming wheel adopt the deflection speed which is relative to the deflection speed used before the abrasion detection, so that the contact time of the excessive wear areas of the single arc trimming wheel with the turning gear grinding wheel profile is reduced, and the deflection speeds of the underwear areas of the arc head of the single arc trimming wheel, which are slower than the deflection speeds used before the abrasion detection, are adopted when participating in the turning gear grinding wheel profile trimming, so that the contact time of the underwear areas of the single arc trimming wheel and the turning gear grinding wheel profile is increased.

Preferably, the wear detection may be off-line or on-line.

The on-line detection is to detect the abrasion of the arc head of the single-arc trimming wheel on a numerical control grinding machine with the grinding wheel trimmer by using a self-contained or post-mounted high-precision detection device of the numerical control grinding machine without removing the single-arc trimming wheel.

Preferably, the turning gear grinding wheel is a ceramic bond diamond turning gear grinding wheel.

In the invention, the axial section of the excircle part of the single-arc finishing wheel is provided with a V-shaped tip, and a single arc serving as the arc head is arranged at the tip of the V-shaped tip.

The beneficial effects of the invention are as follows:

Firstly, according to the dressing wheel normal dynamic deflection type dressing method of the turning gear grinding wheel, the single-arc dressing wheel realizes swinging contact between the arc head of the single-arc dressing wheel and the surface of the turning gear grinding wheel in a normal deflection mode, and uniform abrasion of the surface of the arc head of the single-arc dressing wheel is realized while high-precision dressing of the grinding wheel to be dressed is realized, so that the service life of the single-arc dressing wheel is prolonged.

Secondly, the dressing wheel normal dynamic deflection type dressing method of the turning gear grinding wheel adopts a dynamic variable deflection type compensation method to carry out periodic detection and online wear compensation on uneven wear of the arc head of the single-arc dressing wheel, is used for subsequent turning gear grinding wheel dressing, and further improves dressing precision of the turning gear grinding wheel while improving surface wear uniformity of the arc head of the single-arc dressing wheel.

Drawings

FIG. 1 is a schematic diagram of a coordinate system of a turning gear grinding wheel and a single-arc dressing wheel used in a dressing wheel normal dynamic deflection dressing method of the turning gear grinding wheel;

fig. 2 is a schematic diagram of a trimming process.

In the figure, a gear turning cutter grinding wheel, a single-arc trimming wheel, a circular arc head circle center, a single-arc trimming wheel, a rotary plane, a normal plane and a rotary plane are shown in the figure, wherein the rotary plane is the same as the rotary plane of the single-arc trimming wheel, and the rotary plane is the same as the rotary plane.

In the figure, alpha is the maximum forward deflection angle, beta is the maximum reverse deflection angle, and theta is the zero deflection angle (the value of the deflection angle is zero);

x, Y is two numerical control movable shafts for realizing equidistant relative movement of the circle center of the circular arc head of the single circular arc trimming wheel along the theoretical profile of the turning gear grinding wheel, and C is a numerical control rotary shaft for realizing deflection of the single circular arc trimming wheel around the circle center of the circular arc head.

Detailed Description

The following describes the embodiments of the present invention further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.

Example 1

In the embodiment of the dressing wheel normal dynamic deflection dressing method of the turning gear grinding wheel, a single-arc dressing wheel is adopted to carry out dressing on the surface of the turning gear grinding wheel, the single-arc dressing wheel is driven to carry out rotary motion around the axis of the single-arc dressing wheel during dressing, the single-arc head of the single-arc dressing wheel is enabled to be in contact with the surface to be dressed of the turning gear grinding wheel, so that a dressing contact point between the single-arc dressing wheel and the turning gear grinding wheel is formed, in the dressing process, the circle center of an arc head, located at the dressing contact point, on the single-arc head of the single-arc dressing wheel is controlled to move equidistantly along the theoretical surface of the turning gear grinding wheel, and meanwhile, the circle center of an arc head, located at the dressing contact point, on the single-arc dressing wheel is controlled to carry out swinging motion around the circle center of the dressing contact point on the whole, so that a dynamic deflection angle is formed between a rotary plane formed by the circle center of the single-arc head and a normal plane, located at the dressing contact point, on the turning gear grinding wheel surface, in the dressing process, and the deflection angle is gradually increased from the maximum forward deflection to the maximum deflection angle, and then gradually from the maximum deflection angle to the deflection angle is gradually increased to the deflection angle.

In the embodiment, the single-arc dressing wheel gradually reduces from the maximum forward deflection angle to the zero deflection angle, and gradually increases from the zero deflection angle to the maximum reverse deflection angle to form a forward dynamic deflection period, and one forward movement dressing of the single-arc dressing wheel on the serrated knife grinding wheel is completed through the one forward dynamic deflection period.

As a further improvement of this embodiment, after the circle center of the circular arc head located at the position of the dressing contact point on the single circular arc head of the single circular arc dressing wheel moves equidistantly along one direction along the theoretical surface of the turning gear grinding wheel, the circle center of the circular arc head located at the position of the dressing contact point on the single circular arc head of the single circular arc dressing wheel is controlled to move equidistantly along the opposite direction along the theoretical surface of the turning gear grinding wheel, and in the process of moving equidistantly in the opposite direction, the deflection angle gradually decreases from the maximum reverse deflection angle to the zero deflection angle, and then gradually increases from the zero deflection angle to the maximum forward deflection angle.

In the embodiment, the single-arc dressing wheel gradually reduces from the maximum reverse swing angle to the zero swing angle, and gradually increases from the zero swing angle to the maximum forward swing angle to form a reverse dynamic swing period, and one-time reverse movement dressing of the single-arc dressing wheel on the serrated knife grinding wheel is completed through the reverse dynamic swing period.

In this embodiment, the forward dynamic runout period and the reverse dynamic runout period form a complete dynamic runout period, and forward and reverse movement combined dressing of the single-arc dressing wheel on the serrated knife grinding wheel is completed through the complete dynamic runout period.

Preferably, the dressing of the turning gear grinding wheel by the single-arc dressing wheel is completed by continuously implementing a plurality of complete dynamic deflection cycles.

As a preferable scheme of this embodiment, in a process that the circle center of the arc head located at the position of the dressing contact point on the single arc head of the single arc dressing wheel moves equidistantly along one direction along the theoretical surface of the turning gear grinding wheel, or in a process that the circle center of the arc head located at the position of the dressing contact point on the single arc head of the single arc dressing wheel moves equidistantly along the other direction along the theoretical surface of the turning gear grinding wheel, the dressing of the single arc dressing wheel on the turning gear grinding wheel is completed by continuously implementing the complete dynamic deflection cycle for several times.

In this embodiment, the turning gear grinding wheel is mounted on a turning gear grinding wheel rotating driving shaft, the turning gear grinding wheel rotating driving shaft is mounted on a double-shaft numerical control moving unit with two numerical control moving shafts, the single-arc dressing wheel is mounted on a grinding wheel dresser, the grinding wheel dresser is provided with a numerical control rotating shaft and a dressing wheel rotating driving shaft mounted on the numerical control rotating shaft and used for driving the single-arc dressing wheel to rotate around the axis of the grinding wheel dresser, and the single-arc dressing wheel is mounted on the dressing wheel rotating driving shaft of the grinding wheel dresser, and the equidistant movement of the arc head of the single-arc dressing wheel along the theoretical profile of the turning gear grinding wheel and the normal deflection of the single-arc dressing wheel are realized through the linkage of the two numerical control moving shafts of the double-shaft numerical control moving unit and the one numerical control rotating shaft of the grinding wheel dresser.

The numerical control movable shafts are used for realizing equidistant movement of the arc heads of the single-arc finishing wheel along the theoretical profile of the turning gear grinding wheel, and the numerical control rotary shaft is used for realizing normal deflection of the single-arc finishing wheel.

Preferably, the single-arc trimming wheel realizes that the deflection angle gradually decreases from a maximum positive deflection angle to a zero deflection angle and then gradually increases from the zero deflection angle to a maximum negative deflection angle in the trimming process in a mode of uniformly swinging around the circle center of the circular arc head at the trimming contact point, and the deflection angle gradually decreases from the maximum negative deflection angle to the zero deflection angle and then gradually increases from the zero deflection angle to the maximum positive deflection angle in the trimming process in a mode of uniformly swinging around the circle center of the circular arc head at the trimming contact point.

As a further improvement, the dressing wheel normal dynamic deflection dressing method of the turning gear grinding wheel also adopts a dynamic variable deflection compensation method to carry out periodic detection and online wear compensation on the uneven wear of the arc head of the single-arc dressing wheel, wherein the dynamic variable deflection compensation method comprises the following steps:

(1) The abrasion detection is carried out by periodically detecting after each finishing wheel is used for a prescribed time, and the abrasion data of the arc heads of the single arc finishing wheel are obtained;

(2) The method comprises the steps of dividing the wear area, namely judging whether the wear uniformity of the arc head of the single-arc finishing wheel is generally qualified according to the wear data condition of the arc head of the single-arc finishing wheel, if not, dividing the wear area of the arc head into uniform wear areas with uniform wear amount, excessive wear areas with more wear amount and insufficient wear areas with less wear amount;

(3) In the whole process of trimming the turning gear grinding wheel profile by using the arc head of the single arc trimming wheel, different deflection speeds are set for different wear areas of the single arc trimming wheel, which participate in the turning gear grinding wheel profile trimming, wherein the uniform wear areas of the arc head of the single arc trimming wheel adopt the same deflection speed used before the abrasion detection when participating in the turning gear grinding wheel profile trimming, the excessive wear areas of the arc head of the single arc trimming wheel adopt the deflection speed which is relative to the deflection speed used before the abrasion detection, so that the contact time of the excessive wear areas of the single arc trimming wheel with the turning gear grinding wheel profile is reduced, and the deflection speeds of the underwear areas of the arc head of the single arc trimming wheel, which are slower than the deflection speeds used before the abrasion detection, are adopted when participating in the turning gear grinding wheel profile trimming, so that the contact time of the underwear areas of the single arc trimming wheel and the turning gear grinding wheel profile is increased.

Preferably, the wear detection may be off-line or on-line.

The on-line detection is to detect the abrasion of the arc head of the single-arc trimming wheel on a numerical control grinding machine with the grinding wheel trimmer by using a self-contained or post-mounted high-precision detection device of the numerical control grinding machine without removing the single-arc trimming wheel.

Preferably, the turning gear grinding wheel is a ceramic bond diamond turning gear grinding wheel.

In this embodiment, the axial section of the outer circle part of the single-arc dresser wheel has a V-shaped tip shape, and a single arc as the arc head is provided at the tip of the V-shaped tip shape.

Example 2

In the example, a single-arc dressing wheel with diamond abrasive grains is adopted on a numerical control spline grinding machine to carry out dressing on a running gear grinding wheel. The turning gear cutter grinding wheel of the numerical control spline grinding machine is arranged on a double-shaft numerical control moving unit with two numerical control moving shafts, and the grinding wheel dresser of the numerical control spline grinding machine is provided with a numerical control rotating shaft and a dressing wheel rotating driving shaft which is arranged on the numerical control rotating shaft and used for driving the single-arc dressing wheel to rotate around the axis of the single-arc dressing wheel.

The outer diameter of the single-arc trimming wheel is 100mm, the section is a trapezoid contour, the radius R of the arc at the top of the contour is 0.8 mm, the two sides of the contour are provided with circular ring line segments, the linear speed ratio of the single-arc trimming wheel to the turning gear grinding wheel is 1 to 2, the feeding speed of the single-arc trimming wheel is 50mm/min, and the feeding amount is 0.01 mm.

According to the truing method of the turning gear knife grinding wheel of the embodiment 1, the maximum forward deflection angle alpha of the truing starting end is set to be 75 degrees, the maximum reverse deflection angle beta of the truing tail end is set to be 75 degrees, the zero deflection angle theta of the middle end between the starting end and the tail end is set to be 0 degree, and one complete dynamic deflection period is adopted for each truing.

After 1000 times of cyclic trimming, the trimming depth reaches 10mm, and the circular arc head of the trimmed single circular arc trimming wheel still maintains the circular arc shape of R0.8 mm.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.

Claims (10)

1. A dressing wheel normal dynamic deflection type dressing method of a turning gear grinding wheel is characterized in that a single-arc dressing wheel is adopted to carry out dressing of a turning gear grinding wheel profile, the single-arc dressing wheel is driven to carry out rotary motion around an axis of the single-arc dressing wheel during dressing, a single-arc head of the single-arc dressing wheel is enabled to be in contact with a surface to be dressed of the turning gear grinding wheel, so that a dressing contact point between the single-arc dressing wheel and the turning gear grinding wheel is formed, in the dressing process, the circle center of an arc head, located at the dressing contact point, on the single-arc head of the single-arc dressing wheel is controlled to move equidistantly along one direction along the theoretical surface of the turning gear grinding wheel, and meanwhile, the circle center of the arc head, located at the dressing contact point, on the single-arc dressing wheel is controlled to carry out swinging motion around the circle center of the dressing contact point, so that a rotary plane formed by the circle center of the single-arc head when the single-arc dressing wheel rotates around the axis of the single-arc dressing wheel and a normal plane, located at the dressing contact point, of the turning gear grinding wheel form a dynamic change deflection angle, in the dressing process, the deflection angle is gradually reduced from a maximum forward deflection angle to a zero deflection angle, and then gradually increases from a maximum reverse deflection angle.

2. The method for dressing the turning gear grinding wheel in a normal dynamic deflection mode according to claim 1, wherein the single-arc dressing wheel gradually reduces from a maximum forward deflection angle to a zero deflection angle and gradually increases from the zero deflection angle to a maximum reverse deflection angle to form a forward dynamic deflection period, and one forward movement dressing of the turning gear grinding wheel by the single-arc dressing wheel is completed through the one forward dynamic deflection period.

3. The dressing wheel normal dynamic deflection dressing method of a turning gear grinding wheel according to claim 2, wherein after the circle center of the arc head located at the dressing contact point on the single arc head of the single arc dressing wheel moves equidistantly along one direction along the theoretical surface of the turning gear grinding wheel, the circle center of the arc head located at the dressing contact point on the single arc head of the single arc dressing wheel is controlled to move equidistantly along the theoretical surface of the turning gear grinding wheel in the opposite direction, and in the process of moving equidistantly in the opposite direction, the deflection angle is gradually reduced from the maximum reverse deflection angle to the zero deflection angle, and then gradually increased from the zero deflection angle to the maximum forward deflection angle.

4. The method for dressing the turning gear grinding wheel by the normal dynamic deflection type dressing method of the dressing wheel of the turning gear grinding wheel according to claim 3, wherein the single-arc dressing wheel gradually reduces from a maximum reverse deflection angle to a zero deflection angle and gradually increases from the zero deflection angle to a maximum forward deflection angle to form a reverse dynamic deflection period, and one-time reverse movement dressing of the turning gear grinding wheel by the single-arc dressing wheel is completed through the one reverse dynamic deflection period.

5. The method for dressing the turning gear grinding wheel by the normal dynamic deflection type dressing method according to claim 4, wherein the forward dynamic deflection period and the reverse dynamic deflection period form a complete dynamic deflection period, and the single-arc dressing wheel is used for carrying out forward and reverse movement combined dressing on the turning gear grinding wheel by the complete dynamic deflection period.

6. The dressing method of a turning gear grinding wheel according to claim 5, wherein dressing of the turning gear grinding wheel by the single circular arc dressing wheel is accomplished by continuously performing a plurality of complete dynamic runout cycles.

7. The dressing wheel normal dynamic deflection dressing method of a turning gear grinding wheel according to claim 5, wherein the dressing of the turning gear grinding wheel by the single-arc dressing wheel is completed by continuously executing the complete dynamic deflection cycle several times during equidistant movement of the center of the arc head located at the dressing contact point on the single-arc head of the single-arc dressing wheel along one direction along the theoretical surface of the turning gear grinding wheel or equidistant movement of the center of the arc head located at the dressing contact point on the single-arc head of the single-arc dressing wheel along the other direction along the theoretical surface of the turning gear grinding wheel.

8. The dressing wheel normal dynamic deflection dressing method of a turning gear grinding wheel according to claim 1, wherein the turning gear grinding wheel is mounted on a turning gear grinding wheel rotating drive shaft, the turning gear grinding wheel rotating drive shaft is mounted on a double-shaft numerical control moving unit with two numerical control moving shafts, the single-arc dressing wheel is mounted on a grinding wheel dresser, the grinding wheel dresser is provided with a numerical control rotating shaft and a dressing wheel rotating drive shaft mounted on the numerical control rotating shaft and used for driving the single-arc dressing wheel to rotate around the self axis, the single-arc dressing wheel is mounted on the dressing wheel rotating drive shaft of the grinding wheel dresser, and the equidistant movement of the arc head of the single-arc dressing wheel along the theoretical profile of the turning gear grinding wheel and the normal deflection of the single-arc dressing wheel are realized through the linkage of the two numerical control moving shafts of the double-shaft numerical control moving unit and the numerical control rotating shaft of the grinding wheel dresser.

9. The method for dressing the turning gear grinding wheel in a normal dynamic deflection mode according to claim 3, wherein the single-arc dressing wheel is characterized in that the deflection angle is gradually reduced from a maximum positive deflection angle to a zero deflection angle and then gradually increased from the zero deflection angle to a maximum negative deflection angle in the dressing process in a mode of uniformly swinging around the circle center of the arc head at the dressing contact point, and the deflection angle is gradually reduced from the maximum negative deflection angle to the zero deflection angle and then gradually increased from the zero deflection angle to the maximum positive deflection angle in the dressing process in a mode of uniformly swinging around the circle center of the arc head at the dressing contact point.

10. The dressing wheel normal dynamic deflection type dressing method of the turning gear grinding wheel, which is disclosed in claim 9, is characterized in that a dynamic deflection compensation method is also adopted to carry out periodic detection and online wear compensation on the uneven wear of the circular arc head of the single circular arc dressing wheel, and the contents of the dynamic deflection compensation method are as follows:

(1) The abrasion detection is carried out by periodically detecting after each finishing wheel is used for a prescribed time, and the abrasion data of the arc heads of the single arc finishing wheel are obtained;

(2) The method comprises the steps of dividing the wear area, namely judging whether the wear uniformity of the arc head of the single-arc finishing wheel is generally qualified according to the wear data condition of the arc head of the single-arc finishing wheel, if not, dividing the wear area of the arc head into uniform wear areas with uniform wear amount, excessive wear areas with more wear amount and insufficient wear areas with less wear amount;

(3) In the whole process of trimming the turning gear grinding wheel profile by using the arc head of the single arc trimming wheel, different deflection speeds are set for different wear areas of the single arc trimming wheel, which participate in the turning gear grinding wheel profile trimming, wherein the uniform wear areas of the arc head of the single arc trimming wheel adopt the same deflection speed used before the abrasion detection when participating in the turning gear grinding wheel profile trimming, the excessive wear areas of the arc head of the single arc trimming wheel adopt the deflection speed which is relative to the deflection speed used before the abrasion detection, so that the contact time of the excessive wear areas of the single arc trimming wheel with the turning gear grinding wheel profile is reduced, and the deflection speeds of the underwear areas of the arc head of the single arc trimming wheel, which are slower than the deflection speeds used before the abrasion detection, are adopted when participating in the turning gear grinding wheel profile trimming, so that the contact time of the underwear areas of the single arc trimming wheel and the turning gear grinding wheel profile is increased.