CN114719707A - Device and method for detecting cylinder cylindrical surface slot line precision based on projection track restoration - Google Patents

Abstract

The invention relates to detection equipment and methods for optical precision instruments, in particular to a detection device and a detection method for the accuracy of cylindrical grooves based on projection trajectory restoration, which are used to solve the problems of complicated operation and intelligent operation in the existing detection methods for the accuracy of cylindrical grooves. Due to the low degree of automation, low efficiency, and unstable test accuracy, it is unable to meet the needs of high precision and batch testing. The device for detecting the accuracy of cylindrical groove lines based on projection trajectory restoration includes an annular turntable, a marking board, a marking pen, a translation stage and an adjustment assembly; the present invention adopts the marking pen as the lead point of the cylindrical groove line to align the column on the marking board. The track restoration of the surface groove line can realize the effect of automatic intelligent operation and stable testing throughout the whole process, and can meet the high-precision detection requirements of various optical loads on the cylindrical surface groove line. At the same time, the invention discloses a method for detecting the accuracy of cylindrical groove lines based on projection trajectory restoration.

Description

Apparatus and method for precision detection of cylindrical grooves based on projection trajectory restoration

technical field

The invention relates to detection equipment and methods for optical precision instruments, in particular to a detection device and detection method for the accuracy of cylindrical groove lines based on projection trajectory restoration.

Background technique

With the increasing demand for imaging on the ground and in the aviation and aerospace fields, the research and development of precision optical payloads for imaging is becoming more and more urgent. In order to meet the requirements of the field of view change of the precision optical load, the interval between some optical components must be adjusted accurately. The cylindrical groove line drives the guide post to drive the movement of the optical components to meet the high integration and high precision of the precision optical load system. A common innovative application method required.

The machining of the cylindrical groove line needs to be designed according to the technical indicators, but in the actual processing process, affected by the characteristics of the metal material of the parts and the processing technology, etc., the parts will be deformed during or after processing, thus causing the cylindrical groove line. The machining accuracy is reduced, and it is impossible to ensure that the cylindrical groove line can accurately adjust the interval between optical elements, thereby affecting the optical load and the use effect of precision instruments. Therefore, the accurate detection of the accuracy of the cylindrical groove line after processing is to confirm the cylindrical A very important part of groove line machining accuracy.

In the prior art, the detection method for the accuracy of the cylindrical groove line includes multiple precision detection of the cylindrical groove line by three-coordinate equipment, linear displacement meter, grating detection, image detection and other equipment, and the detection process is complicated and intelligent. Inadequacies such as low level, low efficiency, and unstable test accuracy usually require manual recording of a large number of measurement point data in the measurement process, and finally compare the measurement results with the processing data to verify the accuracy of cylindrical groove processing. Due to the huge number of measurement data points, the efficiency of the existing cylindrical groove line accuracy detection method is very low, and due to the need to continuously manually adjust the measurement equipment, the measurement error is large, which cannot meet the needs of high precision and batch detection.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the problems of complicated operation, low intelligence, low efficiency, and unstable test accuracy in the existing cylindrical groove line accuracy detection method, resulting in the inability to meet the requirements of high precision and batch detection, and to provide a A device and method for detecting the accuracy of cylindrical groove lines based on projection trajectory restoration.

In order to solve the deficiencies existing in the above-mentioned prior art, the present invention provides the following technical solutions:

A cylinder-cylindrical groove line accuracy detection device based on projection trajectory restoration, which is special in that it includes an annular turntable, a marking board, a marking pen, a translation stage and an adjustment component;

The cylindrical body to be inspected is a hollow structure with at least one cylindrical groove line on it, the cylindrical body to be inspected includes at least one equal diameter section, and each cylindrical groove line is located in the same equal diameter section;

The marking plate is arranged on a fixed base on one side of the translation stage;

The annular turntable and the adjustment assembly are arranged on the upper surface of the translation stage, and the adjustment assembly includes an adjustment stage located in the annular turntable, a central shaft arranged on the adjustment stage, and a plurality of annular carriages sleeved on the central shaft, The central axis is perpendicular to the movement direction of the translation stage and parallel to the marking surface of the marking plate, and the rotation axis of the annular turntable coincides with the central axis;

A marking pen is set in each cylindrical groove line of the cylinder to be inspected, and each marking pen includes a marking part, a connecting part, and an elastic part located between the marking part and the connecting part, the connecting part and the corresponding The annular carriage is connected and extends into the chute arranged on the central shaft, and the chute is parallel to the axis of the central shaft.

Further, the connecting portion is adapted to the width of the cylindrical groove line where it is located, the connecting portion passes through the cylindrical groove line where it is located and is threadedly connected to the corresponding annular carriage, and the part of the connecting portion located in the cylindrical groove line is provided with a lubricating medium.

Further, the fitting gap between the connecting portion and the side wall of the cylindrical groove line where it is located is less than 0.01 mm.

Further, the flatness of the marking surface of the marking plate does not exceed 0.01 mm.

At the same time, the present invention provides a method for detecting the accuracy of a cylindrical groove line based on the restoration of a projection trajectory, the special feature of which is that the above-mentioned device for detecting the accuracy of a cylindrical groove line based on the restoration of the projection trajectory includes the following steps:

Step 1. Set the cylinder to be inspected on the annular turntable by adjusting the assembly, and make the cylinder to be inspected coaxial with the annular turntable and the central axis;

Step 2. Set a marker pen in each cylindrical groove line of the cylinder to be inspected, and place the marker pen at the starting end of the cylindrical groove line where it is located. The marker pen is located on the center line of the cylindrical groove line and marks The central axis of the pen is perpendicular to the marking surface of the marking board; adjust the position of the marking board so that the length of the marking pen can meet the requirement that the marking part is in contact with the marking surface of the marking board;

Step 3. Start the translation stage and the annular turntable at the same time, the translation stage drives the annular turntable to move parallel to the marking surface of the marking plate, and the annular turntable drives the cylinder to be inspected to rotate, so that the marking pen in the groove line of each cylinder can be marked on the marking board. The surface marks the trajectory of the cylindrical groove line where it is located, so as to obtain the plane trajectory restoration diagram of the cylindrical groove line of the cylinder to be inspected;

Step 4. Import the plane trajectory restoration map of the cylindrical groove line of the cylinder to be inspected obtained in step 3 into the drawing software, superimpose and compare with the plane trajectory of the theoretical cylindrical groove line, and obtain the error value of each cylindrical groove line.

Further, in step 3, the moving speed of the translation table is not more than 2 cm/s, and the rotation speed of the annular turntable is not more than 30°/s.

Compared with the prior art, the beneficial effects of the present invention are:

(1) The present invention is a cylinder-cylindrical groove line accuracy detection device based on projection trajectory restoration, including an annular turntable, a marker board, a marker pen, a translation stage and an adjustment assembly; the present invention uses a marker pen as a guide for the cylindrical groove line. The contact point is used to restore the trajectory of the cylindrical groove line on the marking board, which can realize the effect of automatic intelligent operation and stable testing in the whole process, and can meet the high-precision detection requirements of various optical loads on the cylindrical groove line.

(2) The present invention is a method for detecting the accuracy of the cylindrical groove line based on the restoration of the projection trajectory. A high-precision annular turntable and a translation stage are used to drive the cylinder to be tested to move to restore the trajectory of the cylindrical groove line. The trajectory restoration map is imported into the mapping software for overlay comparison. The whole testing process only needs one benchmark adjustment before the measurement and the final data import and comparison to complete the detection of the machining accuracy of the cylindrical groove line. It has the advantages of fast adjustment speed, convenient operation, high measurement efficiency, and simple and easy measurement data processing. The advantages.

Description of drawings

FIG. 1 is a schematic structural diagram of an embodiment of a cylindrical groove line accuracy detection device based on projection trajectory restoration (adjustment components are not shown);

FIG. 2 is a schematic structural diagram of the adjustment assembly in the embodiment of FIG. 1 of the present invention;

FIG. 3 is a restoration diagram of the plane track of the cylindrical groove line of the cylinder to be inspected obtained in the embodiment of FIG. 1 of the present invention.

The reference numerals are explained as follows: 01 - cylinder to be inspected; 02 - cylindrical groove line; 1 - annular turntable; 2 - marking plate; 3 - marking pen, 31 - marking part, 32 - elastic part, 33 - connecting part; 4-translation stage; 5-adjustment assembly, 51-adjustment stage, 52-center shaft, 53-ring carriage, 54-chute.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and exemplary embodiments.

Referring to FIGS. 1 and 2 , a cylindrical groove line accuracy detection device based on projection trajectory restoration includes an annular turntable 1 , a marking plate 2 , two marking pens 3 , a translation stage 4 and an adjustment assembly 5 .

The cylinder 01 to be inspected is a hollow structure with at least one cylindrical groove line 02 on it. The cylindrical body 01 to be inspected includes at least one equal diameter section, and each cylindrical groove line 02 is located in the same equal diameter section; in this embodiment, The cylinder 01 to be inspected is an equal diameter cylinder, and two cylindrical groove lines 02 are arranged on the cylinder 01 to be inspected.

The marking plate 2 is arranged on a fixed base on one side of the translation stage 4; the annular turntable 1 and the adjustment assembly 5 are arranged on the upper surface of the translation stage 4, and the adjustment assembly 5 includes an adjustment stage 51 located in the annular turntable 1 and arranged on the adjustment stage 51 The central axis 52 on the center axis 52, and two annular carriages 53 sleeved on the central axis 52, the central axis 52 is perpendicular to the movement direction of the translation stage 4 and parallel to the marking surface of the marking plate 2, the central axis 52 The column to be inspected 01 is sleeved, the bottom surface of the column to be inspected 01 is fixedly connected with the annular turntable 1 , and the column to be inspected 01 and the annular turntable 1 are both coaxially arranged with the central axis 52 .

A marking pen 3 is set in each cylindrical groove line 02 of the cylinder 01 to be inspected, and each marking pen 3 includes a marking part 31 for recording the trajectory of the cylindrical groove line 02 of the cylinder 01 to be inspected and a marking part 31 for recording the trajectory of the cylindrical groove line 02 of the cylinder 01 to be inspected. The connecting portion 33 to which the carriage 53 is fixed, and the elastic portion 32 located between the marking portion 31 and the connecting portion 33 . The connecting portion 33 is threadedly connected to the annular carriage 53 in the cylinder 01 to be inspected through the cylindrical groove line 02 , and extends into the chute 54 provided on the central axis 52 , and the chute 54 is parallel to the central axis 52 axis, so that the connecting part 33 slides in the cylindrical groove line 02 where it is located, the fitting gap between the connecting part 33 and the side wall of the cylindrical groove line 02 is less than 0.01mm, and the connecting part 33 is located on the part of the cylindrical groove line 02 Provided with lubricating medium.

Using the above-mentioned device for detecting the accuracy of cylindrical groove lines based on projection trajectory restoration, the present invention provides a method for detecting the accuracy of cylindrical groove lines based on projection trajectory restoration, comprising the following steps:

Step 1. Set the cylindrical body 01 to be inspected on the annular turntable 1 through the adjustment assembly 5, and make the cylindrical body to be inspected 01 coaxial with the annular turntable 1 and the central axis 52;

Step 2. A marker pen 3 is set in each cylindrical groove line 02 of the cylinder 01 to be inspected, and the marker pen 3 is placed at the starting end of the cylindrical groove line 02 where the marker pen 3 is located. 02 and the central axis of the marking pen 3 is perpendicular to the marking surface of the marking board 2; adjust the position of the marking board 2 so that the length of the marking pen 3 can satisfy the marking part 31 and the marking surface of the marking board 2 contact;

Step 3. Start the translation stage 4 and the annular turntable 1 at the same time, the translation stage 4 drives the annular turntable 1 to move parallel to the marking surface of the marking plate 2, and the annular turntable 1 drives the cylinder 01 to be inspected to rotate, so that each cylinder surface groove line 02 The marking part 31 of the marking pen 3 can both slide in the chute 54 and the cylindrical groove line 02 at the same time, so as to mark the trajectory of the cylindrical groove line 02 on the marking surface of the marking plate 2, so as to obtain the cylinder to be inspected. 01 The plane trajectory restoration diagram of cylindrical groove line 02 is shown in Figure 3; in order to ensure the trajectory restoration accuracy, the moving speed of the translation stage 4 is not greater than 2cm/s, and the rotation speed of the annular turntable 1 is not greater than 30°/s;

Step 4. Import the plane trajectory restoration map of the cylindrical groove 02 of the cylinder to be inspected 01 obtained in step 3 into the drawing software, superimpose and compare with the plane trajectory of the theoretical cylindrical groove 02, and obtain each cylindrical groove 02 error value.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them. For those skilled in the art, the specific technical solutions recorded in the foregoing embodiments can be modified, or some of the technical solutions can be modified. The features are equivalently replaced, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions protected by the present invention.

Claims (6)

1. A cylinder-cylindrical groove line accuracy detection device based on projection trajectory restoration, characterized in that: comprising an annular turntable (1), a marking plate (2), a marking pen (3), a translation stage (4) and an adjustment assembly (5); The cylindrical body (01) to be inspected is a hollow structure with at least one cylindrical groove line (02) thereon, the cylindrical body to be inspected (01) includes at least one equal diameter section, and each cylindrical groove line (02) is located on the same equal diameter section. diameter section; The marking plate (2) is arranged on a fixed base on one side of the translation stage (4); The annular turntable (1) and an adjustment assembly (5) are provided on the upper surface of the translation stage (4), and the adjustment assembly (5) includes an adjustment stage (51) located in the annular turntable (1), and an adjustment stage (51) disposed on the adjustment stage (51). ) on the central axis (52), and a plurality of annular carriages (53) sleeved on the central axis (52), the central axis (52) is perpendicular to the movement direction of the translation stage (4) and parallel to On the marking surface of the marking plate (2), the rotation axis of the annular turntable (1) coincides with the central axis (52); A marking pen (3) is provided in each cylindrical groove line (02) of the cylinder (01) to be inspected, and each marking pen (3) includes a marking part (31), a connecting part (33), and a An elastic part between the marking part (31) and the connecting part (33), the connecting part (33) is connected with the corresponding annular carriage (53) and extends into the chute provided on the central shaft (52) In (54), the chute (54) is parallel to the axis of the central axis (52). 2 . The device for detecting the accuracy of a cylindrical groove line based on projection trajectory restoration according to claim 1 , wherein the connecting portion ( 33 ) is adapted to the width of the cylindrical groove line ( 02 ) where it is located. 3 . , the connecting part (33) is threadedly connected with the corresponding annular carriage (53) through the cylindrical groove line (02), and the part of the connecting part (33) located in the cylindrical groove line (02) is provided with a lubricating medium . 3. The device for detecting the accuracy of cylindrical groove lines based on projection trajectory restoration according to claim 2, characterized in that: between the connecting portion (33) and the side wall of the cylindrical groove line (02) where it is located The fitting clearance is less than 0.01mm. 4 . The device for detecting the accuracy of cylindrical groove lines based on projection trajectory restoration according to claim 3 , wherein the flatness of the marking surface of the marking plate ( 2 ) does not exceed 0.01 mm. 5 . 5. a method for detecting the accuracy of the cylindrical groove line based on the restoration of projection trajectory, it is characterized in that, adopt the accuracy detection device of the cylindrical body cylindrical groove line of a kind of projection trajectory restoration described in claim 1, comprises the steps: Step 1. Set the cylinder (01) to be inspected on the annular turntable (1) by adjusting the assembly (5), and make the cylinder (01) to be inspected coaxial with the annular turntable (1) and the central axis (52); Step 2. Set a marking pen (3) in each cylindrical groove line (02) of the cylinder to be inspected (01), and place the marking pen (3) at the starting end of the cylindrical groove line (02) where it is located , the marking pen (3) is located on the center line of the cylindrical groove line (02) and the central axis of the marking pen (3) is perpendicular to the marking surface of the marking board (2); adjust the position of the marking board (2) so that the marking pen ( 3) The length is sufficient to make the marking portion (31) contact the marking surface of the marking plate (2); Step 3. Start the translation stage (4) and the annular turntable (1) at the same time, the translation stage (4) drives the annular turntable (1) to move parallel to the marking surface of the marking plate (2), and the annular turntable (1) drives the cylinder to be inspected (01) Rotate, so that the marking pen (3) in each cylindrical groove line (02) marks the trajectory of the cylindrical groove line (02) on the marking surface of the marking plate (2), thereby obtaining the cylinder to be inspected (01) Plane trajectory restoration diagram of cylindrical groove line (02); Step 4. Import the plane trajectory restoration map of the cylindrical groove (02) of the cylinder to be inspected (01) obtained in step 3 into the drawing software, superimpose and compare with the plane trajectory of the theoretical cylindrical groove (02), and obtain each The error value of the cylindrical surface groove line (02). 6. The method for detecting the accuracy of a cylindrical groove line based on projection trajectory restoration according to claim 5, characterized in that: in step 3, the moving speed of the translation stage (4) is not greater than 2cm/s, The rotation speed of the annular turntable (1) is not more than 30°/s.

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