CN104677325A - Measuring instrument and measuring method of complex rotating part profile - Google Patents

Abstract

The invention discloses a measuring instrument for the contour of a complicated rotary part and a measuring method thereof. Chassis, base and clamping tremolo. The invention measures the profile data of the test piece through the self-resetting linear displacement sensor, only needs to clamp the test piece through the clamping device, connect the data acquisition device to the displacement sensor, and then the displacement sensor can be driven by the motor to move and the test piece can be moved at the same time. It is suitable for contour measurement of complex rotating parts processed by various spinning, forging, milling, etc. It has compact structure, convenient operation, low equipment cost, reliable measurement and easy analysis of results.

Description

Contour Measuring Instrument for Complicated Rotating Parts and Its Measuring Method

technical field

The invention relates to the field of profile measurement of rotary parts, in particular to a measuring instrument and a measuring method for the profile of complex rotary parts processed and formed by spinning, forging, milling and the like.

Background technique

The contour measurement of complex rotary parts is oriented to complex rotary workpieces, and the self-resetting linear displacement sensor is used to measure the surface of the workpiece point by point. The advantages of convenient operation, reliable centering, and high measurement accuracy make it widely applicable to the measurement of the contour of workpieces such as spinning, forging, and milling.

With the development of industrial technology, the shape of the workpiece tends to be complex, and there are more and more requirements for the measurement of the contour of complex rotary parts. Manual ruler measurement is time-consuming and laborious. The data is only the data obtained from randomly selected measurement points, which cannot reflect the real shape and size of the part. When the measurement accuracy of the workpiece shape is required to be improved, the traditional measurement method can no longer meet the measurement requirements for this type of part; the commonly used three Coordinate measuring instruments and non-contact image three-dimensional measuring instruments need to scan or measure the measured object point by point, not only the cost is too high, the measurement process is complicated, the technical requirements for workers are high, and the data processing has certain complexity .

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of existing measurement technology such as high cost, complicated measurement process, and difficult data processing according to the rotation characteristics of the rotary parts, greatly simplify the measurement method and required equipment of the rotary parts, and provide a special method for complex rotary parts. Profile measuring instrument and its fast measuring method for parts.

The object of the present invention is achieved through the following technical solutions: a profile measuring instrument for complex rotary parts, including a chassis rotary motor, a clamping device, a gantry, a self-resetting linear displacement sensor, a slide table, a guide rail, a linear stepping motor, Rotate the chassis, base and clamping handle; the gantry and the chassis rotary motor are fixed on the base, and the chassis rotary motor drives the rotary chassis to rotate through two bevel gears; the guide rail is fixed on the gantry; linear stepping The motor is fixed on one end of the guide rail, and its output shaft is parallel to the guide rail; the slide table is installed on the guide rail, and the self-resetting linear displacement sensor is fixed on the slide table; the fixed position of the guide rail makes the self-resetting linear displacement sensor move along the guide rail. The moving track of the head passes through the center of the rotating chassis; the upper surface of the rotating chassis has a cross-shaped claw groove, and the clamping device is composed of four claws and the clamping transmission turntable; the clamping handle drives the clamping transmission turntable to rotate through the bevel gear mechanism , the clamping drive turntable drives the claws to move radially along the claw grooves of the rotating chassis through the thread on its upper surface and the thread on the bottom of the claws to realize the movement of clamping or loosening the claws; the self-resetting linear displacement sensor passes through The data acquisition card is connected to the computer.

A method for measuring the profile of a complex rotating part by using the above-mentioned measuring instrument, comprising the following steps:

(1) Adjust the position of the jaws and the self-resetting linear displacement sensor according to the measurement requirements;

(2) Place the piece to be tested on the rotating chassis, turn the clamping handle to center and clamp the piece to be tested, and remove the clamping handle;

(4) Start the linear stepping motor, so that the sliding table drives the self-resetting linear displacement sensor to make radial movement. The self-resetting linear displacement sensor automatically maintains real-time contact with the test piece due to its self-resetting characteristic, and obtains the test piece along the radial direction. Pulse voltage signal of shape data;

(5) The pulse voltage signal collected by the self-resetting linear displacement sensor is converted into discrete points in the radial direction through filtering and amplification, and these discrete points are used to obtain the contour curve of the test piece along the radial direction by interpolation operation. The contour curve rotates around the central axis to obtain the surface contour curve of the test piece;

(6) Start the linear stepper motor, move the self-resetting linear displacement sensor to stop at the outer contour of the part that needs to be measured in the circumferential direction, start the chassis rotation motor to drive the rotating chassis to drive the test piece to rotate around the central axis, and obtain the test piece along the Pulse voltage signal of shape data in the circumferential direction;

(7) Filter and amplify the pulse voltage signal collected by the self-resetting linear displacement sensor, and convert it into discrete points of the test piece in the circumferential direction, and then interpolate these discrete points to obtain the test piece in the circumferential direction Orientation profile curve.

The beneficial effect of the present invention is that: the present invention realizes the measurement of the profile of the complex rotary part according to the rotation characteristics of the rotary part, and the measurement of the profile of the rotary part can be completed simply by controlling the feed of the motor. Compared with the traditional manual measurement, the measurement is reliable, the operation is simple and the obtained data is easy to process; compared with the expensive three-coordinate measuring instrument and image measuring instrument, the measuring equipment and measurement method are greatly simplified, the structure is compact, the operation is convenient, and it is more Suitable for fast measurement of complex rotating part contours.

Description of drawings

Fig. 1 is a structural schematic diagram of a profile measuring instrument for complex rotary parts;

Fig. 2 is a schematic diagram of the chassis rotary transmission mechanism;

Fig. 3 is a schematic diagram of the transmission mechanism of the clamping device;

In the figure, chassis rotary motor 1, clamping device 2, gantry frame 3, self-resetting linear displacement sensor 4, slide table 5, guide rail 6, linear stepping motor 7, rotating chassis 8, base 9, clamping crank 10, Clamp the transmission turntable 11.

Detailed ways

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

As shown in Figure 1, a profile measuring instrument for complex rotary parts of the present invention includes a chassis rotary motor 1, a clamping device 2, a gantry frame 3, a self-resetting linear displacement sensor 4, a slide table 5, a guide rail 6, and a linear stepping motor 7. Rotate the chassis 8, the base 9 and the clamping handle 10; the gantry 3 and the chassis rotary motor 1 are fixed on the base 9, as shown in Figure 2, the chassis rotary motor 1 is driven to rotate through two bevel gears Chassis 8 does rotary motion.

The guide rail 6 is fixed on the gantry 3; the linear stepping motor 7 is fixed on one end of the guide rail 6, and its output shaft is parallel to the guide rail 6; the slide table 5 is installed on the guide rail 6, and the self-resetting linear displacement sensor 4 is fixed on the slide table 5 ; The fixed position of the guide rail 6 is such that when the self-resetting linear displacement sensor 4 moves along the guide rail 6 , the moving track of its contact passes through the center of circle of the rotating chassis 8 .

As shown in Figure 3, the upper surface of the rotating chassis 8 has a cross-shaped claw groove, and the clamping device 2 is composed of four claws 2 and a clamping transmission turntable 11; the clamping handle 10 drives the clamping transmission through a bevel gear mechanism. The turntable 11 rotates, and the clamping drive turntable 11 cooperates with the threads on the upper surface and the bottom of the claw 2 to drive the claw 2 to move radially along the claw groove of the rotating chassis 8 to realize the clamping or loosening of the claw 2 Movement; the self-resetting linear displacement sensor 4 is connected to the computer through a data acquisition card.

When using the measuring instrument of the present invention, the clamping device and the measuring device are adjusted according to different measurement requirements, the data acquisition card is connected to the drive, and the motor is started to complete the measurement of the profile of the part to be measured.

The method of the present invention for measuring the profile of a complex rotary part comprises the following steps:

(1) Adjust the position of the claw 2 and the self-resetting linear displacement sensor 4 according to the measurement requirements;

(2) Place the piece to be tested on the rotating chassis 8, turn the clamping handle 10 to center and clamp the piece to be tested, and remove the clamping handle 10;

(4) Start the linear stepper motor 7, so that the sliding table 5 drives the self-resetting linear displacement sensor 4 to perform radial movement, and the self-resetting linear displacement sensor 4 automatically maintains real-time contact with the test piece due to its self-resetting characteristic, and obtains the The pulse voltage signal of the shape data of the part along the radial direction;

(5) Convert the pulse voltage signal collected by the self-resetting linear displacement sensor 4 into discrete points in the radial direction through filtering and amplification, and use interpolation calculations to obtain the contour curve of the test piece along the radial direction. The profile curve is rotated around the central axis to obtain the surface profile curve of the test piece;

(6) Start the linear stepper motor 7, move the self-resetting linear displacement sensor 4 to stop at the outer contour of the part that needs to be measured in the circumferential direction, start the chassis rotation motor 1 to make the rotating chassis 8 drive the workpiece to be tested to rotate around the central axis, and obtain The pulse voltage signal of the shape data of the test piece along the circumferential direction;

(7) Filter and amplify the pulse voltage signal collected by the self-resetting linear displacement sensor 4, and convert it into discrete points of the test piece in the circumferential direction, and then interpolate these discrete points to obtain the test piece at Contour curves in the circumferential direction.

Claims (2)

1. a complicated revolving meber profile measurer, it is characterized in that, comprise chassis turning motor (1), clamp device (2), portal frame (3), Self-resetting linear displacement transducer (4), slide unit (5), guide rail (6), linear stepping motor (7), swivel base (8), base (9) and clamping crank (10); Described portal frame (3) and chassis turning motor (1) are all fixed on base (9), and chassis turning motor (1) coordinates driving swivel base (8) to do gyration by two conical gear;

Guide rail (6) is fixed on portal frame (3); Linear stepping motor (7) is fixed on one end of guide rail (6), and its output shaft is parallel with guide rail (6); Slide unit (5) is arranged on guide rail (6), and Self-resetting linear displacement transducer (4) is fixed on slide unit (5); The position that guide rail (6) is fixed makes Self-resetting linear displacement transducer (4) when mobile along guide rail (6), and its contact motion track is by the center of circle of swivel base (8);

Swivel base (8) upper surface has cruciform claw groove, and clamp device (2) is made up of four claws (2) and clamping driving turntable (11); Clamping crank (10) drives clamping driving turntable (11) to rotate by conical gear mechanism, clamping driving turntable (11) is by the threaded engagement bottom its upper surface screw thread and claw (2), drive claw (2) to do radial motion along the claw groove of swivel base (8), realize the motion that claw (2) clamps or unclamps; Self-resetting linear displacement transducer (4) connects computing machine by data collecting card.

2. utilize measuring instrument described in claim 1 to measure a method for complicated revolving meber appearance profile, it is characterized in that, comprise the following steps:

(1) position of claw (2) and Self-resetting linear displacement transducer (4) is adjusted according to measurement demand;

(2) to be measured is placed on swivel base (8), rotates clamping crank (10) by be measured centering clamping, unload clamping crank (10);

(4) linear stepping motor (7) is started, slide unit (5) is made to drive Self-resetting linear displacement transducer (4) to do radial motion, Self-resetting linear displacement transducer (4) keeps the real-time contact with to be measured automatically because of its Self-resetting characteristic, obtains to be measured the pulse voltage signal along radial direction shape data;

(5) pulse voltage signal collected by Self-resetting linear displacement transducer (4) is converted to the discrete point of this radial direction by filtering and amplification, interpolation operation is used to obtain to be measured the contour curve along radial direction these discrete points, this contour curve is rotated a circle around central axis, obtains the surface outline curves of to be measured;

(6) linear stepping motor (7) is started, mobile Self-resetting linear displacement transducer (4) makes it be parked in the part outline place needing circumference to measure, starting chassis electric rotating machine (1) makes swivel base (8) drive to be measured around central axis, obtains the pulse voltage signal of to be measured along the circumferential direction shape data;

(7) pulse voltage signal that Self-resetting linear displacement transducer (4) collects carried out filtering and amplify process, be converted to be measured at this circumferentially discrete point, then these discrete points carried out interpolation operation and obtain to be measured the contour curve at circumferencial direction.