CN208042983U - A kind of guide rail linearity measuring system - Google Patents

Abstract

The utility model discloses a guide rail straightness measuring system, which includes two parts: a mechanical part and a measuring part. The mechanical part includes a reference guide rail parallel to the measured guide rail. A probe base is fixed on the component, and the probe base has a connecting cross bar. One end of the connecting cross bar is located above the tested guide rail as the installation end; the measuring part includes displacement sensors arranged on the installation end of the connecting cross bar, and the displacement sensors are all vertical On the surface of the measured guide rail, the displacement sensor is connected to an analog-to-digital converter, and the analog-to-digital converter is connected to a processor through a data acquisition card. The utility model is a guide rail straightness measurement system with simple structure and convenient operation. The displacement sensor moves linearly along the reference guide rail, which eliminates the influence of reference error translation and rotation. The straightness of the guide rail can be obtained quickly, efficiently and accurately.

Description

A guide rail straightness measurement system

technical field

The utility model belongs to the technical field of measuring devices, in particular to a guide rail straightness measuring system.

Background technique

Many precision equipment have guide rails, and the straightness of the guide rail surface has a very important influence on the quality of the processed parts. For example, the guide rail of the machine tool is used as the moving reference of the worktable, which has an important influence on the processing and manufacturing of the actual parts. Among them, the inspection of motion straightness should comprehensively consider translation and rotation errors. The methods of straightness error measurement can generally be divided into two categories, one is to compare with measurement benchmarks, and the other is to measure methods without benchmarks. However, the existing measurement methods all have the problems of complex structure of the measurement device, complex steps of the measurement process, and large error of the measurement result due to the principle error caused by the measurement reference.

Utility model content

The purpose of the utility model is to provide a guide rail straightness measurement system, which solves the problems of the principle error caused by the measurement reference, the complex structure of the measuring device and the complicated process steps in the existing prior art.

The technical solution adopted by the utility model is: a guide rail straightness measurement system, including two parts: a mechanical part and a measuring part. , the moving assembly moves along the reference guide rail, the moving assembly is fixed with a probe base, the probe base has a connecting cross bar, and one end of the connecting cross bar is located above the measured guide rail as an installation end;

The measuring part includes two displacement sensors arranged on the mounting end of the connecting cross bar, both of the displacement sensors are perpendicular to the surface of the measured guide rail, and the two displacement sensors are connected with an analog-to-digital converter. The analog-to-digital converter is connected to a processor through a data acquisition card.

Preferably, the probe base is a magnetic gauge base.

Preferably, the moving assembly is composed of two mutually perpendicular plates, and the two plates are closely attached to the reference guide rail and its side wall respectively.

Further, the two displacement sensors both use Bi1-5-EG08-LU inductive sensors.

Further, the model of the analog-to-digital converter is MAX196.

Further, the model of the data acquisition card is PCL-816.

The beneficial effect of the utility model is that: a guide rail straightness measurement system of the utility model solves the problems of the principle error caused by the measurement reference, the complex structure of the measuring device and the complicated process steps in the prior art. Its structure is simple and easy to operate. The displacement sensor moves linearly along the reference guide rail, which eliminates the influence of reference error translation and rotation. By collecting the signal transformed from the distance from the guide rail and comparing it with the processor, it can be quickly, efficiently and accurately obtained. Straightness of the guide rail.

Description of drawings

Fig. 1 is a structural schematic diagram of the mechanical part of a guide rail straightness measuring system of the present invention;

Fig. 2 is a structural schematic diagram at the installation end A of the connecting cross bar in Fig. 1;

Fig. 3 is a connection block diagram of the measurement part of a guide rail straightness measurement system of the present invention.

In the figure, 1. Measured guide rail, 2. Reference guide rail, 3. Moving component, 4. Probe seat, 5. Connecting crossbar, 6. Displacement sensor, 7. Digital-to-analog converter, 8. Data acquisition card, 9 .processor.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

A guide rail straightness measurement system provided by the utility model includes two parts: a mechanical part and a measuring part. There is a moving component 3, which moves along the reference guide rail 2, on which the probe base 4 is fixed, and the probe base 4 has a connecting cross bar 5, and one end of the connecting cross bar 5 is located at the end of the measured guide rail 1 as the installation end. Above; as shown in Figure 3, the measuring section includes two displacement sensors 6 arranged at the installation end A of the connecting cross bar 5, the two displacement sensors 6 are arranged perpendicular to the surface of the measured guide rail 1, and the two displacement sensors 6 are connected together An analog-to-digital converter 7 is provided, and the analog-to-digital converter 7 is connected to a processor 9 through a data acquisition card 8 .

Preferably, the probe base 4 is a magnetic gauge base, and the moving assembly 3 is correspondingly made of metal, which facilitates disassembly of the probe base 4 on the surface of the moving assembly 3 .

Specifically, the moving assembly 3 is composed of two mutually perpendicular plates, and the two plates are closely attached to the reference guide rail 2 and its side wall, so as to ensure that the moving assembly 3 drives the probe head 4 to move along a straight line. No offset will occur.

As an example, the two displacement sensors both use Bi1-5-EG08-LU inductive sensors, the model of the analog-to-digital converter is MAX196, and the model of the data acquisition card is PCL-816.

Before the measurement, the moving assembly 3 is close to the reference guide rail 2 and can move along its straight line, adjust the distance between the two displacement sensors 6 and ensure that it is perpendicular to the surface of the measured guide rail 1, that is, between the two displacement sensors 6 parallel to each other. The precise positioning of the displacement sensor 6 is guaranteed by the following two conditions: finish machining the moving assembly 3, and actually use a V-shaped iron with grade 1 precision, make use of an included angle of 90° to be in close contact with the reference guide rail 2, and accurately measure the magnetic force The width of the table base; the adjustment of the distance between the displacement sensors 6 depends on the watch clips provided by the magnetic table base. The distance adjustment range of the displacement sensors 6 is 20-85mm, and the distance error of the displacement sensors 6 can be guaranteed to be less than 0.5mm. In order to ensure the correct position of the displacement sensor 6, the installation position of the displacement sensor 6 must be adjusted to ensure that the two displacement sensors 6 are flush and aligned. A value of zero then clamps.

During the measurement, the moving assembly 3 drives the magnetic base and the two displacement sensors 6 clamped on the magnetic base to move linearly along the reference guide rail 2. The change signal of the vertical distance, then the signal is converted into a digital signal by the digital-to-analog converter 7, and then sent to the processor 9 after the data acquisition card 8, and the processor 9 will receive the distance information and the initial preset distance The straightness of the surface of the tested guide rail 1 can be obtained by performing continuous comparison (if necessary, it can also be output through the error icon).

Claims (6)

1. a kind of guide rail linearity measuring system, which is characterized in that including Machinery Ministry and measurement portion two parts, the Machinery Ministry packet The basic rack parallel with tested guide rail is included, moving assembly is provided on the basic rack, the moving assembly is led along benchmark Rail moves, and measuring head base is fixed on the moving assembly, and there is the measuring head base connection cross bar, one end of the connection cross bar to make It is located at the top of tested guide rail for installation end；

The measurement portion includes two displacement sensors being set on the connection cross bar installation end, two displacement sensings Device is each perpendicular to the setting of tested guide rail surface, and two institute's displacement sensors are connected with analog-digital converter jointly, and the modulus turns Parallel operation is connected with processor by data collecting card.

2. a kind of guide rail linearity measuring system as described in claim 1, which is characterized in that the measuring head base is magnetic power meter Seat.

3. a kind of guide rail linearity measuring system as described in claim 1, which is characterized in that the moving assembly is mutual by two Perpendicular plank composition, two planks are tightly fitted closely with basic rack and its side wall respectively.

4. a kind of guide rail linearity measuring system as described in claim 1, which is characterized in that two institute's displacement sensors are equal Using Bi1-5-EG08-LU type inductance type transducers.

5. a kind of guide rail linearity measuring system as described in claim 1, which is characterized in that the model of the analog-digital converter For MAX196.

6. a kind of guide rail linearity measuring system as described in claim 1, which is characterized in that the model of the data collecting card For PCL-816.