CN103776372A - Device and method for measuring side precision of gear of automobile transmission - Google Patents

Abstract

The invention discloses a device and method for measuring the accuracy of the side surface of an automobile gearbox gear, including a laser plane generator, a laser detection target, and a motion mechanism controlled by an embedded system. The first and second connecting rods of the motion mechanism pass through The first and second servo mechanisms control the up and down movement of the laser plane generator and the up, down or translational movement of the laser detection target. The laser plane generator is in close contact with or separated from the measured plane through the first electrically controlled magnetic seat. The laser plane is generated when it is in contact with the measured plane; the laser detection target is in close contact with or separated from the measured plane through the second electro-magnetic seat, and the height of the laser plane is measured when it is in contact with the measured plane, and the measured data is directly transmitted to the embedded system, and finally display the measurement results on the embedded system screen. The invention uses the laser plane as the measurement base surface, and has high measurement precision; based on the motion mechanism controlled by the embedded system, the automation of the measurement process is realized and the measurement speed is improved.

Description

Measuring device and method for side accuracy of automobile gearbox gear

technical field

The invention relates to a gear side precision measuring device and method, in particular to a measuring device and method for the gear side precision of an automobile gearbox.

Background technique

As a key component of the car, the quality of the gear directly affects the comfort and reliability of the car. Improving the factory quality of automobile gears is not only the guarantee of automobile quality, but also the guarantee of personal safety. At present, the traditional detection methods are still used in the production process of automobile gears in our country, and there is a lack of effective online detection devices. For example, the side accuracy of the spiral bevel gear is detected by manual feeler gauge, relying on the degree of insertion of the feeler gauge to detect whether the side accuracy of the gear meets the quality requirements of the product. Although this method is simple to operate, the accuracy is low and there are human factors. , different people at different time periods, the strength of the feeler gauge is different, the measurement results are different, and there is a lot of randomness in the measurement results. Therefore, it is of great significance to study the on-line detection device in the production process of automobile gears to ensure the quality of key automobile parts and adapt to the development of modern automobile industry.

Contents of the invention

The object of the present invention is to provide a measuring device and method with high measuring precision, fast measuring speed, accurate and automatic measurement, and dimensional accuracy of the side surface of automobile gears.

The present invention is realized through the following technical solutions: a device for measuring the accuracy of the gear side of an automobile gearbox, including a test platform, a laser plane generator, a laser detection target, and a motion mechanism controlled by an embedded system, and the motion mechanism includes its The drive assembly of the first and second servos and the first and second connecting rods are installed inside. The first connecting rod is connected with the first servo and can be stretched up and down. The second connecting rod It is connected with the second servo, and can be stretched up and down or moved in parallel; one end of the laser plane generator is movably connected with the first connecting rod through the first connector, and the other end is connected with the first electric control magnetic seat, so One end of the laser detection target is movably connected to the second connecting rod through the second connector, and the other end is connected to the second electric control magnetic base; the laser plane generator is closely connected to the measured plane through the first electric control magnetic base. contact or separation, the laser detection target is in close contact or separation with the measured plane through the second electrically controlled magnetic seat.

The laser detection target of the present invention is a laser position sensor, and its measuring range is 24mm.

The first and second connectors described in the present invention are flexible movable connectors.

Adopt the measuring method of device of the present invention, comprise the following steps:

(1) The test platform transports the gear to the designated position by the conveyor belt;

(2) Guided by the motion mechanism, the laser plane generator and laser detection target move down from the initial position to 0.5mm above the measured plane and enter the working state;

(3) The electrically controlled magnetic base of the laser plane generator is energized so that it is in close contact with the surface to be measured, and a laser plane is generated as the base surface for measurement;

(4) Under the guidance of the motion mechanism, the laser detection target moves in parallel along a circular trajectory to reach the preset test point;

(5) The electrically controlled magnetic seat of the laser detection target is energized so that it is in close contact with the surface to be measured, and a laser plane is generated as the measurement base surface;

(6) The laser detection target measures the laser plane height value, and the measured data is directly transmitted to the embedded system;

(7) The electric control magnetic seat of the laser detection target is powered off, so that it is separated from the measured plane;

(8) The laser detection target translates to the next test point, and repeats steps (4) to (7) until the measurement of all preset test points is completed;

(9) Guided by the motion mechanism, the laser plane generator is separated from the measured plane, moves upward together with the laser detection target, and returns to the initial position; at the same time, the embedded system program performs corresponding operations on the data according to the least square evaluation method and Analysis; Finally, the measurement results are displayed on the embedded system screen or transmitted to other intelligent terminal devices through the communication interface;

(10) The measured gears are transported by the test platform to the corresponding qualified or unqualified product conveyor belts according to the measurement results.

Compared with the prior art, the present invention has the following advantages:

(1) Using laser plane measurement technology, the measurement accuracy is higher;

(2) The servo mechanism controlled by the embedded system controls the automatic up, down or parallel movement of the laser plane generator and the laser detection target, realizing the automation of the entire measurement process and higher measurement efficiency.

(3) The motion mechanism controlled by the embedded system realizes the contact and separation between the laser plane generator and the laser detection target and the surface to be tested. The gear and the test platform do not need to rotate during the test, so the test platform and the test system itself The flatness and levelness requirements are very low.

Description of drawings

Fig. 1 is a structural principle diagram of the measuring device of the present invention.

Fig. 2 is a structural principle diagram of the drive assembly in the measuring device of the present invention.

Fig. 3 is a schematic diagram of the movement trajectory of the laser detection target in the measuring device of the present invention.

Fig. 4 is a working flow chart of the measuring device of the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

Referring to Figures 1 to 3, the base of the laser plane generator 4 is an electrically controlled magnetic base 6a, which realizes the contact and separation between the generator 4 and the measured plane 9; when the generator 4 is in close contact with the measured surface, it will generate laser light. The plane 13 is used as the measurement base surface; the generator 4 is connected to the connecting rod 2a through an elastic movable connector 3a; the base of the laser detection target 5 is an electrically controlled magnetic base 6b, which realizes the connection between the target 5 and the measured plane 9 Contact and separation action; the target 5 is connected with the connecting rod 2b through the flexible movable connector 3b; the connecting rods 2a and 2b are connected with the driver assembly 1; the connecting rod 2a can be driven by the servo mechanism 10a in the driver assembly Up and down expansion and contraction; driven by the servo mechanism 10b in the driver assembly 1, the connecting rod 2b can be expanded and contracted up and down, and can be centered on the axis 8, and perform fixed-point circular motion according to the target moving track 11 and the preset measuring point 12, and the circumference diameter Can be changed continuously or discontinuously. The gear to be tested is placed on the test platform 7 with the side 9 facing upwards; the test platform 7 is stationary during the measurement process, and can move in one direction in a straight line before and after the measurement to realize the transmission of the gear. The driving signals of the servo mechanisms 10a and 10b, the electro-magnetic seats 6a and 6b and the test platform 7 in the driver assembly 1 are all provided by the embedded system. During the measurement process of the target 5, every time a measurement point is completed, the data is directly transmitted to the embedded system; after the test is completed, the measurement results are displayed on the embedded system screen or other intelligent terminal screens.

The measurement method of the present embodiment is carried out as follows:

(1) The test platform transports the gear from the conveyor belt to the designated position in the measuring device;

(2) Guided by the motion mechanism, the laser plane generator and laser detection target move down from the initial position to 0.5mm above the measured plane and enter the working state;

(3) The electrically controlled magnetic seat of the laser plane generator is energized so that it is in close contact with the surface to be measured, and a red laser with a wavelength of 635nm is used to generate a laser plane by rotating a total reflection prism as the measurement base surface, and its plane accuracy is 2.5 μm /m, laser plane diameter 2m;

(4) Under the guidance of the motion mechanism, the laser detection target moves in parallel along a circular trajectory to reach the preset test point;

(5) The electrically controlled magnetic seat of the laser detection target is energized so that it is in close contact with the surface to be tested;

(6) The laser detection target measures the laser plane height value, and the measured data is directly transmitted to the embedded system;

(7) The electric control magnetic seat of the laser detection target is powered off, so that it is separated from the measured plane;

(8) The laser detection target translates to the next test point, and repeats steps (4) to (7) until the measurement of all preset test points is completed;

(9) Guided by the motion mechanism, the laser plane generator is separated from the measured plane, moves upward together with the laser detection target, and returns to the initial position; at the same time, the embedded system program performs corresponding operations on the data according to the least square evaluation method and Analysis; Finally, the measurement results are displayed on the embedded system screen or transmitted to other intelligent terminal devices through the communication interface;

(10) The measured gears are transported by the test platform to the corresponding qualified or unqualified product conveyor belts according to the measurement results.

Claims (4)

1. an automobile gearbox gear side precision measure device, comprise test platform, it is characterized in that, also comprise laser plane generator, laser acquisition target, motion by embedded system control, described motion comprises that its inside is equipped with driver assembly and first, second connecting rod of first, second servomechanism, and described first connecting rod is connected with described the first servomechanism, can upper and lowerly stretch, described second connecting rod is connected with the second servomechanism, can upper and lowerly stretch or parallel; Described laser plane generator one end is movably connected by the first connector and described first connecting rod, the other end is connected with the first automatically controlled magnet base, described laser acquisition target one end is movably connected by the second connector and second connecting rod, and the other end is connected with the second automatically controlled magnet base; Described laser plane generator with tested plane close contact or separate, produces laser plane by described the first automatically controlled magnet base during with described tested plane contact; Described laser acquisition target with tested plane close contact or separate, is measured laser plane height number by described the second automatically controlled magnet base during with described tested plane contact.

2. a kind of gear side surface accuracy measurement mechanism according to claim 1, is characterized in that, described laser acquisition target is laser position sensors, and its measurement range is 24mm.

3. a kind of gear side surface accuracy measurement mechanism according to claim 1, is characterized in that, described first, second connector is for having flexible flexible jumper.

4. for a measuring method for device described in claim 1, it is characterized in that, comprise the following steps:

(1) test platform is transported to assigned address gear by travelling belt;

(2) guided by motion, laser plane generator and laser acquisition target move down into 0.5mm place, distance tested plane top by initial position, enter duty;

(3) the automatically controlled magnet base of laser plane generator energising, makes itself and measured surface close contact, and produces laser plane as measurement basal plane;

(4) laser acquisition target, under motion guiding, along circular trace parallel, arrives default test point;

(5) the automatically controlled magnet base of laser acquisition target energising, makes itself and measured surface close contact;

(6) laser acquisition target measuring laser plane height number, the data that record are directly transferred to embedded system;

(7) the automatically controlled magnet base power-off of laser acquisition target, makes itself and tested planar separation;

(8) translation of laser acquisition target is to next test point, and repeating step (4)～(7), until complete the measurement of all default test points;

(9) guided by motion, laser plane generator and tested planar separation move upward together with laser acquisition target, turn back to initial position; Embedded system program carries out corresponding computing and analysis according to least-square evaluation method to data simultaneously; Finally be transferred to other intelligent terminal by embedded system screen display measurement result or by communication interface;

(10) gear of having measured is transported on corresponding specification product or substandard product travelling belt by test platform according to measurement result.

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