阅读说明：本技术 一种滚齿机高速二次对齿的方法及系统 (High-speed secondary gear aligning method and system for gear hobbing machine ) 是由 郭阿赛 李鹏举 刘孝辉 付海通 于 2020-06-09 设计创作，主要内容包括：本发明属于滚齿加工技术领域,具体公开了一种滚齿机高速二次对齿的方法及系统,该方法利用非接触式磁性传感器,通过快速旋转齿轮,实现一圈的齿顶坐标扫描,传感器信号直接进入驱动器,由驱动器直接记录编码器角度并反馈给控制系统做算法运算。相较于现有技术,本发明采用驱动器优先记录数据的方式,可保障数据的实时性和准确性,减少了数据记录延迟；通过旋转齿轮,滚齿机利用传感器高速扫描抓取齿轮点位,在保证高速扫描的情况下,同时保证对齿精度,提高了二次加工时齿轮对齿的效率。(The invention belongs to the technical field of hobbing, and particularly discloses a high-speed secondary tooth aligning method and a high-speed secondary tooth aligning system for a hobbing machine. Compared with the prior art, the invention adopts the mode that the driver records the data preferentially, can ensure the real-time and the accuracy of the data and reduce the data recording delay; through the rotating gear, the gear hobbing machine utilizes the high-speed scanning of sensor to snatch the gear position, under the circumstances of guaranteeing high-speed scanning, guarantees simultaneously to the tooth precision, has improved the gear efficiency of gear pair tooth in the secondary operation.)

1. A high-speed secondary tooth aligning method of a gear hobbing machine is characterized by comprising the following steps:

pushing the sensor out to a detection position;

the axial direction corresponding to the rotating gear;

causing the sensor to scan the tooth tops of the gears, each time a tooth is scanned, sending a corresponding one of the sensor signals to the driver;

the driver acquires the sensor signal, captures the angle corresponding to each tooth acquired by the encoder, and feeds the angle back to the control system of the machine tool;

until the sensor signals and angles of all the teeth of the gear are captured.

2. The method for high speed secondary tooth alignment for a gear hobbing machine of claim 1, wherein the sensor is a non-contact magnetic sensor.

3. The method for high speed secondary tooth pairing in a gear hobbing machine according to claim 1, wherein the sensor is facing the tooth tips of the gear in the sensing position.

4. The method for high-speed secondary tooth alignment of a gear hobbing machine as claimed in claim 1, characterized in that the sensor is moved by means of a cylinder drive and the cylinder action is detected by the control system.

5. A method of high speed secondary tooth alignment in a gear hobbing machine according to claim 1, characterized in that tooth alignment commands are given in the control system before the corresponding axial direction of the rotating gear.

6. The method for high-speed secondary tooth alignment of a gear hobbing machine according to claim 5, wherein the tooth alignment command comprises sensor signals for setting the number of scanning points, the position for storing the captured data and the reference.

7. The method for high-speed secondary tooth aligning of a gear hobbing machine according to claim 5 or 6, characterized in that the tooth aligning command is manually input by a user or is pre-stored in a storage unit of the control system.

8. The method for high-speed secondary tooth alignment of a gear hobbing machine of claim 1, wherein the sensor is retracted after the gripping is completed.

9. A high-speed secondary tooth aligning system of a gear hobbing machine is characterized by comprising:

the rotating shaft is used for driving the gear to rotate;

a sensor to scan the tooth tops of the gears as the gears rotate and send a corresponding one of the sensor signals to the driver each time a tooth is scanned;

an encoder for acquiring an angle of a tooth corresponding to the sensor signal;

and the driver is used for acquiring the sensor signal, simultaneously grabbing the angle corresponding to each tooth acquired by the encoder, and feeding the angle back to a control system of the gear hobbing machine.

10. The system for high speed secondary tooth pairing of a gear hobbing machine of claim 9, further comprising:

and a sensor push-out mechanism for pushing out and retracting the sensor to and from a detection position at which the sensor is disposed to face the tooth tips of the gear.

Technical Field

The invention relates to the technical field of gear hobbing, in particular to a high-speed secondary gear aligning method and system for a gear hobbing machine.

Background

The hobbing machine is a gear processing machine for processing straight teeth, helical teeth and herringbone gear cylindrical gears by hobbing cutter according to generating method. At present, a precise numerical control gear hobbing machine is widely applied to various machine manufacturing industries such as automobiles, engineering machinery, mining machinery, instruments, aircraft spacecrafts and the like due to the advantages of high precision and high efficiency in gear processing.

In the process of hobbing technology, the following technical requirements are met:

in order to ensure the stability of the meshing during gear transmission, certain hardness requirements are usually imposed on the surface of the gear. At the moment, the gear needs to be roughly machined, the gear profile is machined, and the quenching heat treatment is taken down, so that the surface hardness of the gear is improved. The surface of the gear is deformed due to the heat treatment, and the gear needs to be clamped on a machine tool again for finish machining and finishing. Due to the rotation characteristic of the gear, the same clamping position of two times is difficult to ensure, and at the moment, the surface of the gear needs to be positioned by using a sensor. In the secondary processing tooth aligning process of the gear, how to accurately and quickly complete the tooth aligning of the cutter and the gear is very important. The specific process of secondary tooth alignment is as follows:

1. after rough machining of the gear profile, the angle of revolution of each tooth of the gear needs to be detected by a sensor before the gear is removed.

2. And (4) after quenching, re-clamping, and detecting the rotation angle corresponding to each tooth of the gear by using the sensor again.

And the difference value of the two comparison results is the correction value after clamping.

In order to improve the gear machining efficiency, the capturing of the tooth surface angle needs to be performed accurately and quickly by penetrating through the sensor. However, in the prior art, the sensor signal is usually directly inputted into the control system of the hobbing machine, and then the control system informs the driver to grab the encoder angle, which is complicated in process, resulting in low speed and delayed data recording.

Disclosure of Invention

In order to solve the above problems, a primary objective of the present invention is to provide a method and a system for high-speed secondary tooth alignment of a gear hobbing machine, so as to simplify the tooth alignment process, increase the speed of positioning the surface of a gear during secondary machining of the gear hobbing machine, and reduce the data recording delay.

In order to achieve the purpose, the invention discloses a high-speed secondary tooth aligning method of a gear hobbing machine, which comprises the following steps of:

pushing the sensor out to a detection position;

the axial direction corresponding to the rotating gear;

causing the sensor to scan the tooth tops of the gears, each time a tooth is scanned, sending a corresponding one of the sensor signals to the driver;

the driver acquires the sensor signal, captures the angle corresponding to each tooth acquired by the encoder, and feeds the angle back to the control system of the machine tool;

until all the angles of the teeth of the gear are grabbed.

Further, the sensor is a non-contact magnetic sensor.

Further, the sensor faces the tooth tip of the gear in the detection position.

Further, the sensor is moved by means of a cylinder drive and the cylinder action is detected by the control system.

Further, tooth commands are given in the control system before the respective axial direction of the rotary gear.

Furthermore, the pair of tooth instructions comprises a set scanning point number, a position for storing the captured data and a reference sensor signal.

Further, the pair of tooth commands are manually input by a user or previously stored in a storage unit of the control system.

Further, after all the tooth angles are captured, the sensor is retracted. And the control system performs arithmetic operation on the data transmitted by the driver to calculate the correction value of the gear clamping.

The invention also discloses a high-speed secondary tooth aligning system of the gear hobbing machine, which comprises the following steps: the rotating shaft is used for driving the gear to rotate; a sensor to scan the tooth tops of the gears as the gears rotate and send a corresponding one of the sensor signals to the driver each time a tooth is scanned; an encoder for acquiring an angle of a tooth corresponding to the sensor signal; and the driver is used for acquiring the sensor signal, simultaneously grabbing the angle corresponding to each tooth acquired by the encoder, and feeding the angle back to a control system of the gear hobbing machine.

Further, a sensor pushing-out mechanism is included to push out and retract the sensor to and from a detection position at which the sensor is disposed to face the tooth tops of the gear.

Based on the technical scheme, the high-speed secondary tooth aligning method and the high-speed secondary tooth aligning system of the gear hobbing machine have the following beneficial effects that: the sensor signal directly enters the driver, the angle of the encoder is directly recorded by the driver, and the driver feeds back the recorded angle to the control system for arithmetic operation; through the rotating gear, the gear hobbing machine utilizes the high-speed scanning of sensor to snatch the gear position, under the circumstances of guaranteeing high-speed scanning, guarantees simultaneously to the tooth precision, has improved the gear efficiency of gear pair tooth in the secondary operation.

Drawings

Fig. 1 is a flow chart of the steps of a method for high speed secondary tooth alignment in a gear hobbing machine according to one embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a high-speed secondary tooth aligning system of the gear hobbing machine according to the invention.

In the drawings:

1: a gear; 2: a sensor; 3: a driver; 4: a motor; 41: a rotating shaft; 5: a cylinder; 51: a telescopic rod; 6: and (5) controlling the system.

Detailed Description

In order to make the technical solution of the embodiments of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by equivalent changes and modifications by one skilled in the art based on the embodiments of the present invention, shall fall within the scope of the present invention.

Referring to fig. 1, a flowchart of the steps of a high-speed secondary tooth aligning method of a gear hobbing machine according to the present invention is shown. Meanwhile, please refer to fig. 2 in combination, which shows a schematic structural diagram of a high-speed secondary tooth aligning system of the gear hobbing machine according to the present invention.

In the embodiment, the programming is performed according to the steps of the method, and the program is written into the control system, so that when an operator performs the tooth aligning operation of the secondary processing on the gear 1, the operator only needs to operate the program on the operation interface of the control system to issue the tooth aligning instruction, and the automatic high-speed tooth aligning operation can be realized. The specific steps of the high-speed secondary tooth aligning method of the gear hobbing machine are described below.

First, step 101: and starting. The operator runs a program in the control system to give a tooth-to-tooth command (G10 command). The pair of tooth commands may be manually entered by a user or stored in a storage unit of the control system. Meanwhile, the tooth pairing instruction further comprises sensor signals for setting the number of scanning points, the position for storing the captured data and the reference.

Step 102: the cylinder is detected to move, and the sensor is pushed out to the detection position. In the present embodiment, the sensor 2 is provided on the telescopic rod 51 of the cylinder 5, and is pushed out to the detection position and retracted with the telescopic motion of the telescopic rod 51. When the telescopic rod 51 is extended, the sensor 2 is pushed out to a detection position where the sensor 2 faces the tooth crest of the gear 1. In the present embodiment, the sensor 2 is preferably a non-contact magnetic sensor, and there is a certain gap between the sensor 2 and the gear 1 when detecting, so that the sensor 2 can detect each tooth top when the gear 1 rotates. The switch signal line of the sensor 2 is connected to an interface of the driver 3, and the driver 3 will perform the detection of the signal of the sensor 2.

Next, step 103: and starting a tooth aligning instruction and informing a driver to perform scanning and grabbing. When the sensor 2 reaches the detection position, the control system 6 informs the driver 3 to perform scanning and grabbing.

Step 104: the sensor sends a signal to the driver for each tooth scanned by the corresponding axial direction of the rotating gear. In this step, since the gear 1 is clamped on the rotating shaft 41, the rotating shaft 41 is rotated by the motor 4. The motor 4 is driven by the driver 4, so that the rotating shaft 41 starts to drive the gear 1 to rotate, and during the rotation, when the sensor 2 scans the tooth top, a corresponding sensor signal is transmitted to the driver 3 every time the sensor scans one tooth.

Step 105: and the driver acquires the sensor signal and simultaneously grabs the angle of the encoder immediately and feeds the angle back to the control system. Since the encoder is provided on the motor 4, the rotation angle of the rotary shaft 41, that is, the revolution angle of the gear 1 can be obtained. Thus, when the driver 3 scans one tooth to obtain the sensor signal, the corresponding encoder angle is immediately grasped, and the tooth surface angle corresponding to each tooth is obtained. The driver 3 feeds back point location information for each tooth encountered by the sensor to the control system 6.

Step 106: and after the sensor signals and angles of all the teeth are captured, the sensors retract. After the gear rotates for one circle, the sensor 2 finishes one circle of tooth crest coordinate scanning, and the angle of the encoder corresponding to the purchased tooth is also captured by the driver 3 and sent to the control system. At the moment, after the scanning and grabbing work of the driver is finished, the control system can calculate the data transmitted by the driver to obtain the correction value of the gear clamping. The sensor 2 is retracted by the cylinder 5. After the clamping position of the gear 1 is corrected, secondary finish machining can be performed.

Step 107: and (6) ending. The routine is terminated.

Referring to fig. 2, the high-speed secondary tooth aligning system of the gear hobbing machine disclosed in the present invention includes a rotating shaft 41 for driving the gear 1 to rotate; a sensor 2 for scanning the tooth top of the gear 1 while the gear 1 is rotating and for sending a corresponding one of the sensor signals to the driver 3 for each scanning of one tooth; an encoder (not shown) for acquiring the angle of the teeth corresponding to the sensor signal; and the driver 3 is used for acquiring the sensor signal, simultaneously grabbing the angle corresponding to each tooth acquired by the encoder, and feeding the angle back to a control system of the gear hobbing machine. The system of the present embodiment includes a sensor pushing-out mechanism for pushing out and retracting the sensor to and from a detection position at which the sensor 2 is disposed to face the tooth crest of the gear 1.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; while the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.