CN205138418U - A Portable Flatness Measuring Instrument Based on Magnetic Grating Ruler - Google Patents

Abstract

The utility model relates to a portable roughness measuring apparatu based on magnetic grid chi. The device comprises a mechanical probe 7, a stepping motor 1, a magnetic grid ruler and a base 6, wherein two ends of the base 6 are provided with supports 5, one end of each support 5 is provided with the stepping motor 1, the middle of each support 5 is provided with a lead screw guide rail 2, the stepping motor 1 is connected with the lead screw guide rail 2, and a sliding block 3 is arranged on the lead screw guide rail 2; the magnetic grid ruler is open and comprises a magnetic strip 8 and a magnetic head 9; the magnetic grid ruler is arranged on the outer surface of the sliding block 3, the sliding block 3 is provided with a fixed frame 4, the probe 7 is directly fixed on the fixed frame 4 together with the magnetic strip 8, the magnetic head 9 is arranged on the sliding block 3, and the magnetic head 9 is embedded with the probe 7. The utility model is convenient to carry to the experimental site, and can effectively and conveniently measure the flatness of a plurality of planes which are not convenient to disassemble; the precision is high, and personnel reading or other high-difficulty operations are not needed; the degree of automation is high, can accurately obtain positional information and the roughness information of this position.

Description

A Portable Flatness Measuring Instrument Based on Magnetic Grating Ruler

technical field

The utility model belongs to the technical field of flatness measurement, in particular to a portable flatness measuring instrument based on a magnetic grid ruler.

Background technique

With the continuous development of science and technology in our country and the continuous transformation of the machinery industry, the requirements for measurement accuracy are getting higher and higher. The surface flatness of a plane is a common and very important measurement item in the industrial field. It has extensive and important applications for the positioning, installation and testing of various parts. Flatness means that the surface will not be absolutely flat when processing or producing industrial parts. The difference between the unevenness and absolute flatness is the flatness, which generally refers to the difference between the highest point and the lowest point between the wafer surface and the reference plane. The current flatness measuring instrument is relatively large, and the measuring instrument with high precision is relatively expensive, and there is a lack of automatic and high-precision portable flatness measuring instrument.

Contents of the invention

The purpose of the utility model is to provide a portable flatness measuring instrument based on a magnetic grating ruler in view of the shortcomings of existing flatness measuring instruments.

The technical solution of the utility model is: a portable flatness measuring instrument based on a magnetic grid ruler, including a mechanical probe, a stepping motor, a magnetic grid ruler, and a base, and brackets are arranged at both ends of the base, and the brackets A stepper motor is installed at one end, a screw guide rail is set in the middle of the bracket, the stepper motor is connected to the screw guide rail, and a slider is set on the screw guide rail; the magnetic scale is open, including a magnetic strip and a magnetic head; The magnetic grating ruler is installed on the outer surface of the slider, a fixed frame is arranged on the slider, the probe is directly fixed on the fixed frame with the magnetic strip, the magnetic head is arranged on the slider, and the magnetic head Compatible with the probe.

Further, the output end of the magnetic strip is connected to a micro-PC, the displacement of the probe is converted into the displacement of the magnetic strip, and the displacement of the magnetic strip is converted into an analog quantity and output to the micro-PC.

Further, the probe includes a probe inner core and a probe outer core, and a spring is arranged at the lower part of the probe inner core.

Further, a support frame is installed on the upper part of the inner core of the probe, the support frame is an inverted "L" shape, and a magnetic strip is installed on the vertical side of the "L" shape.

Further, the magnetic strip is parallel to the inner core of the probe.

Further, the fixed end of the probe on the fixed frame uses a spring to keep the probe always in contact with the plane to be measured.

The technical solution of the utility model is a contact measuring device which uses a magnetic grid ruler to measure displacement and a micro control panel to perform automatic compensation, and effectively reduces the size of the device while meeting the precision requirements, thereby achieving the purpose of portability.

The flatness measuring instrument designed by the utility model is suitable for detecting small and medium-sized metal planes. It is relatively lightweight and easy to carry to the experimental site. The flatness measuring instrument is fixed on the plane to be tested, and the slider is driven by a stepping motor. Drive the probe to move back and forth along the lead screw guide rail in a straight line, the probe perpendicular to the working surface produces a vertical displacement along with the uneven contour of the working surface, and then convert the displacement into the change of electricity through the magnetic scale and input it into the micro PC , the micro PC will process and analyze the data after all the points are measured, so as to measure the surface flatness of the surface to be tested, and display it on the liquid crystal display, so as to realize the measurement of the flatness of the surface to be tested.

The flatness measuring instrument of the utility model adopts Abbe's principle, that is, the dimension line of the measured part and the reference line used for reading in the instrument should be arranged in a straight line in sequence, and there is only a secondary small error, so the precision is high.

The beneficial effects of the utility model are: relatively lightweight, easy to carry to the experimental site, especially for the effective and convenient measurement of the flatness of many planes that are not easy to disassemble; high precision, no need for personnel reading or other difficult operations; degree of automation High, can accurately obtain position information and the flatness information of the position; in line with economic principles, low cost, high quality and low price.

Description of drawings

Figure 1 is a structural diagram of a portable flatness measuring instrument based on a magnetic scale.

Figure 2 is an assembly diagram of the probe and the magnetic strip.

Among them: 1. stepper motor; 2. screw guide rail; 3. slider; 4. fixed frame; 5. bracket; 6. base; 7. probe; 8. magnetic strip; 9. magnetic head; 10. to be tested Plane; 11. Support frame; 12. Probe inner core; 13. Probe outer core; 14. Spring.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical" , "horizontal" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation , are constructed and operated in a specific orientation and therefore cannot be construed as limiting the invention.

A portable flatness measuring instrument based on a magnetic scale, comprising a mechanical probe 7, a stepping motor 1, a magnetic scale, a base 6, a support 5 is provided at both ends of the base 6, and one end of the support 5 is installed with A stepper motor 1 is provided with a lead screw guide rail 2 in the middle of the bracket 5, the stepper motor 1 is connected with the lead screw guide rail 2, and a slider 3 is set on the lead screw guide rail 2; the magnetic grating scale is open and includes a magnetic strip 8. Magnetic head 9; the magnetic grating scale is installed on the outer surface of the slider 3, a fixed frame 4 is set on the slider 3, and the probe 7 is directly fixed on the fixed frame 4 with the magnetic strip 8, The magnetic head 9 is arranged on the slider 3 , and the magnetic head 9 is fitted with the probe 7 .

The output end of the magnetic strip 8 is connected with the micro-PC, the displacement of the probe 7 is converted into the displacement of the magnetic strip 8, and the displacement of the magnetic strip 8 is converted into an analog quantity and output to the micro-PC.

The probe 7 includes a probe inner core 12 and a probe outer core 13 , and a spring 14 is arranged at the bottom of the probe inner core 12 .

A support frame 11 is installed on the top of the probe inner core 12, the support frame 11 is an inverted "L" shape, and a magnetic strip 8 is installed on the vertical side of the "L" shape.

The magnetic strip 8 is parallel to the inner core 12 of the probe.

The fixed end of the probe 7 on the fixed frame 4 uses a spring 14 to keep the probe 7 always in contact with the plane 10 to be measured.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limitations of the present invention, and those skilled in the art are within the scope of the present invention. Variations, modifications, substitutions and variations can be made to the above-described embodiments.

Claims (6)

1. the portable roughness measurement instrument based on magnetic railings ruler, comprise mechanical probes (7), stepper motor (1), magnetic railings ruler, base (6), it is characterized in that being provided with support (5) at the two ends of described base (6), one end of support (5) is provided with stepper motor (1), arranges lead screw guide rails (2) in the centre of support (5), stepper motor (1) is connected with lead screw guide rails (2), and lead screw guide rails (2) arranges slide block (3); Described magnetic railings ruler is open, comprises magnetic stripe (8), magnetic head (9); Described magnetic railings ruler is arranged on the outside surface of described slide block (3), described slide block (3) arranges fixed mount (4), described probe (7) directly and magnetic stripe (8) be fixed on fixed mount (4), described magnetic head (9) is arranged on slide block (3), described magnetic head (9) and probe (7) tabling.

2. a kind of portable roughness measurement instrument based on magnetic railings ruler according to claim 1, it is characterized in that the output terminal of described magnetic stripe (8) is connected with miniature PC, the converts displacement of described probe (7) is the displacement of described magnetic stripe (8), and described magnetic stripe (8) converts displacement is that analog output is to miniature PC.

3. a kind of portable roughness measurement instrument based on magnetic railings ruler according to claim 1, is characterized in that described probe (7) comprises probe inner core (12), the outer core (13) of probe, is provided with spring (14) in the bottom of probe inner core (12).

4. a kind of portable roughness measurement instrument based on magnetic railings ruler according to claim 2, it is characterized in that, on the top of described probe inner core (12), bracing frame (11) is installed, bracing frame (11), for inverted "L" shaped, installs magnetic stripe (8) at the vertical edge of " L " type.

5. a kind of portable roughness measurement instrument based on magnetic railings ruler according to claim 3, is characterized in that paralleling with described probe inner core (12) at described magnetic stripe (8).

6. a kind of portable roughness measurement instrument based on magnetic railings ruler according to claim 2, is characterized in that the stiff end of described probe (7) on fixed mount (4) utilizes spring (14) to keep probe (7) to keep in touch with plane to be measured (10) all the time.