CN116124029A - Automatic clamp for auxiliary detection of microscopic morphology of surface of standard component and use method thereof - Google Patents

Abstract

The invention relates to an automatic clamp for assisting in detecting microscopic morphology on the surface of a standard component and a use method thereof, the automatic clamp comprises a supporting device, a driving device and a clamping device, the supporting device comprises a clamp bottom plate, the driving device and the clamping device are positioned above the clamp bottom plate, the clamping device comprises a clamp panel and a clamp plate, the clamp plate is positioned on the clamp panel, the clamp plate is connected with the clamp panel in a sliding manner, the clamp plate is used for clamping the tested standard component, the driving device comprises a single-shaft digital steering engine, a double-shaft digital steering engine and a rotary table, the lower end of the double-shaft digital steering engine is connected with the rotary table, the lower end of the rotary table is connected with the single-shaft digital steering engine, the single-shaft digital steering engine is arranged above the clamp bottom plate, the single-shaft digital steering engine is used for driving an inner ring of the rotary table to realize 360-degree circumferential rotation, and the double-shaft digital steering engine is used for driving the clamp panel to realize 180-degree swinging. The invention improves the detection efficiency and has high imaging speed.

Description

Automated fixture for auxiliary detection of surface microscopic topography of standard parts and method of use thereof

technical field

The invention relates to the field of precision machining surface topography measurement, in particular to an automatic fixture for assisting in detecting the microscopic topography of the surface of a standard part and a method for using the same.

Background technique

Surface micro-topography measurement refers to the measurement of the micro-geometric shape of the material surface, which is of great significance to the analysis and characterization of materials. White light scanning interferometer is widely used in the detection and analysis of material surface morphology. It has the advantages of non-contact and fast measurement speed. It is a non-contact surface quality measurement method widely used in the field of industrial technology. At the same time, measuring fixtures are an important tool to ensure measurement accuracy and improve measurement efficiency. They are widely used in many occasions. Appropriate fixtures can greatly simplify measurement operations and reduce the risk of errors.

As shown in Figure 5, the Benz part is an industry standard part proposed by the Mercedes-Benz Group for the inspection and processing capability of the mold industry. It combines more than 10 features such as planes, slopes, curved surfaces, and inner holes. Therefore, It is necessary to measure the surface micro-morphology of Mercedes-Benz parts to check their processing level. When the white light interferometer measures a sample with a certain slope on the surface, the surface morphology of the measured area on the slope or curved surface becomes blurred on the computer analysis interface, and the interference fringes on the sample surface cannot be found. Therefore, when using a white light interferometer to measure the surface micro-topography of Mercedes-Benz parts, it is necessary to manually adjust the inclination angle of the white light interferometer before measurement, so that the curved surface or inclined surface of the measured part is similar to a plane, so that the curved surface and inclined surface of the Mercedes-Benz parts can be measured. surface micromorphology. Due to manual adjustment of the inclination angle of the interferometer, the adjustment speed is slow and the accuracy is not high, so it is necessary to design an automatic fixture for Mercedes-Benz parts that improves detection efficiency and high adjustment accuracy.

When using a white light interferometer to measure the surface micro-topography of a curved surface or an inclined surface, there are two main methods: (1) adjust the rotation angle of the white light interferometer measurement lens through the hand wheel; (2) manually adjust the angle of the interferometer tilt table so that The tested sample is rotated so that the measured curved surface or inclined surface approximates a plane.

The disadvantage of the method of measuring the surface microscopic topography of curved or inclined surfaces by adjusting the measuring lens with the hand wheel is that the measuring lens can only be rotated back and forth, and cannot be deflected in the left and right directions; and the range of rotation angles is limited, which needs to be adjusted on the workbench The position of the workpiece to be measured can be used to measure the surface micro-topography of the curved or inclined surface.

The disadvantages of the method of manually adjusting the angle of the tilting table are: manual adjustment is slow, imaging speed is slow, and detection efficiency is low; it cannot bear a large load; and the measurement cost is high.

In summary: the main shortcoming of present known technology has the following aspects:

1. Adjusting the measurement angle is mainly manual adjustment, with low degree of automation, slow imaging speed and low efficiency.

2. The angle adjustment range is limited. When detecting complex curved surfaces of some samples, other methods are needed to obtain clear interference fringes.

3. There is no method or device specially used to detect the microscopic topography of the surface of Mercedes-Benz parts.

The Chinese patent document with the notification number CN210180396U discloses an "electric two-dimensional tilting table", which includes a tilting table base, a Y-direction tilting drive mechanism, a joint ball tilting guide structure, a backlash-removing structure, and an X-direction tilting drive mechanism. The tilt table is used to cooperate with the white light interferometer to realize automatic adjustment of the tilt angle and precision positioning of the tested part. But this electric tilt table is used to replace the manual type tilt table. For some white light interferometers that use a hand wheel to adjust the angle of the detection lens, the detection platform itself cannot adjust the angle. Therefore, the above electric tilt table is not universal.

Contents of the invention

The purpose of the present invention is to provide an automatic fixture for assisting in detecting the surface micro-topography of standard parts and its use method in order to solve the defects of low automation and detection efficiency when using white light interferometer to detect the micro-topography of the surface of Mercedes-Benz parts.

The purpose of the present invention can be achieved through the following technical solutions:

An automatic fixture for assisting in detecting the surface microscopic topography of standard parts, including a supporting device, a driving device and a clamping device,

The support device includes a clamp base plate, the driving device and the clamping device are located above the clamp base plate,

The clamping device includes a clamping panel and a nipper, the clamping plate is located on the clamping panel, the clamping plate is slidably connected with the clamping panel, and the clamping plate is used for clamping the standard part to be measured,

The driving device includes a single-axis digital steering gear, a double-axis digital steering gear and a turntable. The digital steering gear is connected, and the single-axis digital steering gear is set above the bottom plate of the fixture. The single-axis digital steering gear is used to drive the inner ring of the turntable to achieve a 360-degree circular rotation, and the two-axis digital steering gear is used to drive the fixture panel. Achieve 180-degree swing.

Standard parts in this application refer to standard parts that combine more than 10 features such as planes, slopes, curved surfaces, and inner holes, also known as Mercedes-Benz parts, which were first proposed by the Mercedes-Benz Group for mold industry inspection An industry standard piece of machining capability.

In one embodiment of the present invention, the automatic fixture further includes a control device, the control device includes an infrared remote controller and a steering gear controller, the steering gear controller is arranged above the bottom plate of the fixture, and the single-axis digital The leads of the steering gear and the double-axis digital steering gear are connected with the steering gear controller, and the infrared remote controller controls the rotation of the single-axis digital steering gear and the double-axis digital steering gear through the steering gear controller.

In one embodiment of the present invention, two nippers are symmetrically arranged on the clamp panel, and two chute are provided on the clamp panel, and the bottom ends of the two nippers are slidably connected with the chute, so that The clamping device also includes two handwheels and two lead screws, one end of the lead screw is connected with the handwheel, and the other end of the lead screw is connected with the nipper.

In one embodiment of the present invention, the lead screw is fixed on the fixture panel by a lead screw nut.

In one embodiment of the present invention, the nipper is a vise.

In one embodiment of the present invention, the driving device further includes two steering gear plates and a steering gear disc, one end of one steering gear plate is connected to the bottom end of the fixture panel, and the other end is connected to the bottom end of the clamp panel through the steering gear disc. The two-axis digital steering gear is connected, and the steering gear board is used to support the clamping device to swing in the direction of 180 degrees;

One end of the other steering gear board is connected to the top of the turntable, and the other end is connected to the two-axis digital steering gear, and the said steering gear board is used to fix the two-axis digital steering gear.

In one embodiment of the present invention, the support device further includes a workbench, and the workbench includes a first placement board, a second placement board and a third placement board in sequence from top to bottom, and the first placement board It is fixed on the second placement plate by screws, the lower end of the second placement plate is fixed above the fixture bottom plate through copper studs, and the third placement plate is fixed above the fixture bottom plate through copper studs.

In one embodiment of the present invention, the turntable includes a turntable bearing and a circular stainless steel plate, a circular stainless steel plate is provided at the upper and lower ends of the turntable bearing, and the circular stainless steel plate is connected to the turntable bearing by bolts On both sides of the inner ring, the two circular stainless steel plates are respectively arranged between the first placing plate and the second placing plate.

In one embodiment of the present invention, the driving device further includes a coupling, and the circular stainless steel plate at the lower end is connected to the single-axis digital steering gear through the coupling, and the single-axis digital steering gear is installed with the third Placed under the plate, the single-axis digital steering gear drives the turntable bearing to rotate circularly through the coupling.

In addition, the present invention also provides a method for using an automatic fixture for assisting in detecting the microscopic topography of the surface of a standard part, and the specific steps are as follows:

S1. Before measurement, rotate the two handwheels, the handwheels drive the lead screw to rotate, the lead screw pushes the nipper to move linearly on the chute through the lead screw nut, change the relative position of the two nippers, and adjust the clamped measured standard tightness of parts;

S2. When measuring the surface topography of the curved surface or inclined surface of the measured standard part, the spatial position angle of the measured standard part is changed. At this time, the center of gravity of the measured standard part will shift. The test standard part is far away from the center of the fixture panel, thereby reducing the influence of the center of gravity shift of the standard part under test;

S3. After the standard part to be tested is clamped, its rotation is controlled and driven by the single-axis digital steering gear, the double-axis digital steering gear, the steering gear controller and the infrared remote control, and the single-axis digital steering gear and the double-axis digital steering gear The lead wire is connected to the steering gear controller, write the program to the steering gear controller and power on, and control the rotation of the single-axis digital steering gear and the double-axis digital steering gear through the infrared remote control, thereby changing the spatial position and angle of the standard part to be tested. Make the measured surface or slope approximate to a plane.

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

1. The present invention uses two high-torque, high-precision digital steering gears as the driving source, and accurately and quickly controls the rotation angle of the steering gear shaft through the steering gear controller and the infrared remote control, thereby driving the measured Mercedes-Benz parts to adjust the position angle Adjustment makes the measured curved surface and inclined surface approximate to the plane. The above method is beneficial to the measurement of the white light interferometer, making the rotation angle of the measured Mercedes-Benz parts more accurate and the rotation range larger, eliminating the need for manual adjustment, making the imaging speed faster. Effectively improve the detection efficiency and solve the problem of slow imaging speed;

2. During the rotation of the Mercedes-Benz parts held by the fixture, the center of gravity of the Mercedes-Benz parts will shift. The simple vise device provided by the present invention can clamp the Mercedes-Benz parts after adjusting the relative position of its nippers, so that Reduce the impact of the center of gravity offset during the rotation of Mercedes-Benz parts;

3. When manually adjusting the rotation angle of the white light interferometer to measure the lens, the range of rotation is limited. The single-axis digital steering gear used in the present invention can realize a 360-degree circular rotation, and the maximum controllable angle range of the dual-axis digital steering gear is 180 degrees, can effectively detect the complex surface of the sample;

4. The load that the floating platform of the white light interferometer can bear cannot exceed 35kg, and the steering gear has the advantages of compact size and light weight relative to the motor, which ensures the load that the floating platform can bear to a certain extent. The overall weight of the fixture is light, but it can effectively clamp the Mercedes-Benz parts for surface topography measurement, which meets the load range that the floating platform of the white light interferometer can bear;

5. The fixture of the present invention is specially used for the measurement of white light interference morphology on the surface of Mercedes-Benz parts, and it is universal for the standard parts of Mercedes-Benz parts;

6. The jig of the present invention has a compact structure and will not collide with the measuring lens of the white light interferometer in comprehensive consideration of the rotation range.

Description of drawings

Fig. 1 is the front view of the automatic measurement fixture provided by the embodiment of the present invention;

Fig. 2 is the left view of the automatic measuring fixture provided by the embodiment of the present invention;

3 is a schematic diagram of a clamping device in an automated measuring fixture provided by an embodiment of the present invention;

4 is a schematic diagram of the bottom plate of the fixture in the automated measurement fixture provided by the embodiment of the present invention;

Fig. 5 is a structural schematic diagram of the tested standard part (ie the tested Mercedes-Benz part) of the present invention.

Explanation of reference signs: 1. hand wheel, 2. lead screw, 3. nipper, 4. fixture panel, 5. screw, 6. coupling, 7. copper stud, 8. single-axis digital steering gear, 9 , steering gear plate, 10, steering gear disc, 11, double-axis digital steering gear, 12, turntable bearing, 13, lead screw nut, 14, chute, 15, round stainless steel plate, 16, workbench, 17, Fixture bottom plate, 18, steering gear controller, 19, S-shaped concave surface, 20, inclined surface, 21, inner hole, 22, curved surface with variable curvature, 23, continuous smooth curved surface, 24, plane, 25, inverted cone truncated.

Detailed ways

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

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying Describes, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate in a specific orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Example

Referring to Fig. 1 to Fig. 4, the present embodiment provides an automatic fixture for assisting in detecting the surface micro-topography of a standard part, including a supporting device, a driving device and a clamping device,

The support device includes a clamp base plate 17, and the driving device and the clamping device are located above the clamp base plate 17,

The clamping device includes a clamp panel 4 and a nipper 3, the nipper 3 is located on the clamp panel 4, the nipper 3 is slidably connected with the clamp panel 4, and the nipper 3 is used for clamping the standard part to be measured ,

The driving device includes a single-axis digital steering gear 8, a double-axis digital steering gear 11 and a turntable, the clamp panel 4 is connected to the double-axis digital steering gear 11, and the lower end of the double-axis digital steering gear 11 is connected to the turntable. The lower end of the turntable is connected with a single-axis digital steering gear 8, which is arranged above the fixture base plate 17, and the single-axis digital steering gear 8 is used to drive the inner ring of the turntable to realize a 360-degree circular rotation. The axis digital steering gear 11 is used to drive the fixture panel 4 to realize the swing of 180 degrees.

In this embodiment, the automatic fixture also includes a control device, the control device includes an infrared remote controller and a steering gear controller 18, and the steering gear controller 18 is arranged above the fixture bottom plate 17, and the single-axis digital steering gear The lead wire of machine 8 and biaxial digital steering gear 11 is connected with steering gear controller 18, and described infrared remote controller controls the rotation of single shaft digital steering gear 8 and biaxial digital steering gear 11 through steering gear controller 18.

In this embodiment, two nippers 3 are arranged symmetrically on the clamp panel 4 , and two chute 14 is provided on the clamp panel 4 , and the bottom ends of the two nippers 3 are slidably connected to the chute 14 , the clamping device also includes two handwheels 1 and two lead screws 2 , one end of the lead screw 2 is connected with the handwheel 1 , and the other end of the lead screw 2 is connected with the nipper 3 .

In this embodiment, the lead screw 2 is fixed on the fixture panel 4 through a lead screw nut 13 .

In this embodiment, the nipper 3 is a flat-nose pliers.

In this embodiment, the driving device further includes two steering gear plates 9 and a steering gear disc 10, one end of one steering gear plate 9 is connected to the bottom end of the fixture panel 4, and the other end passes through the steering gear disc 10 Connected with the two-axis digital steering gear 11, the steering gear board 9 is used to support the clamping device to swing in a direction of 180 degrees;

One end of another steering gear board 9 is connected to the top of the turntable, and the other end is connected to the two-axis digital steering gear 11 , and the said steering gear board 9 is used to fix the two-axis digital steering gear 11 .

In this embodiment, the supporting device further includes a workbench 16, and the workbench 16 includes a first placement board, a second placement board and a third placement board in turn from top to bottom, and the first placement board is screwed 5 is fixed on the second placement plate, the lower end of the second placement plate is fixed above the clamp bottom plate 17 through copper studs 7 , and the third placement plate is fixed above the fixture bottom plate 17 through copper studs 7 .

In this embodiment, the turntable includes a turntable bearing 12 and a circular stainless steel plate 15, the upper and lower ends of the turntable bearing 12 are respectively provided with a circular stainless steel plate 15, and the circular stainless steel plate 15 is connected to the turntable by bolts On both sides of the inner ring of the bearing 12, the two circular stainless steel plates 15 are respectively arranged in the middle of the first placing plate and the second placing plate.

In this embodiment, the driving device further includes a coupling 6, and the circular stainless steel plate 15 at the lower end is connected with the single-axis digital steering gear 8 through the coupling 6, and the single-axis digital steering gear 8 is installed with the first Three placed under the board, the single-axis digital steering gear 8 drives the turntable bearing 12 through the coupling 6 to perform circular rotation.

In addition, the present invention also provides a method for using an automatic fixture for assisting in detecting the microscopic topography of the surface of a standard part, and the specific steps are as follows:

S1. Before measuring, rotate the two hand wheels 1, the hand wheel 1 drives the screw 2 to rotate, the screw 2 pushes the nipper 3 to move linearly on the chute 14 through the screw nut 13, and changes the relative position of the two nippers 3 , to adjust the tightness of the clamped standard part to be tested;

S2. When measuring the surface topography of the curved surface or inclined surface of the measured standard part, the spatial position angle of the measured standard part is changed. At this time, the center of gravity of the measured standard part will shift, and the clamped part can be clamped by moving the nipper 3 The measured standard part is far away from the center of the fixture panel 4, thereby reducing the influence of the center of gravity shift of the measured standard part;

S3, after clamping the standard part to be tested, it is controlled and driven by the single-axis digital steering gear 8, the double-axis digital steering gear 11, the steering gear controller 18 and the infrared remote controller, and the single-axis digital steering gear 8 and the double-axis digital steering gear The leads of the digital steering gear 11 are connected to the steering gear controller 18, write the program to the steering gear controller 18 and power on, and control the rotation of the single-axis digital steering gear 8 and the double-axis digital steering gear 11 through the infrared remote controller, thereby changing The spatial position angle of the standard part to be measured makes the measured curved surface or inclined surface approximate to a plane.

The above descriptions of the embodiments are for those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments, and apply the general principles described here to other embodiments without creative efforts. Therefore, the present invention is not limited to the above-mentioned embodiments. Improvements and modifications made by those skilled in the art according to the disclosure of the present invention without departing from the scope of the present invention should fall within the protection scope of the present invention.

Claims (10)

1. An automatic clamp for assisting in detecting microscopic morphology of the surface of a standard component is characterized by comprising a supporting device, a driving device and a clamping device,

the supporting device comprises a clamp base plate (17), the driving device and the clamping device are positioned above the clamp base plate (17),

the clamping device comprises a clamp panel (4) and a clamp plate (3), wherein the clamp plate (3) is positioned on the clamp panel (4), the clamp plate (3) is connected with the clamp panel (4) in a sliding way, the clamp plate (3) is used for clamping a tested standard piece,

the driving device comprises a single-shaft digital steering engine (8), a double-shaft digital steering engine (11) and a rotary table, the lower end of the clamp panel (4) is connected with the double-shaft digital steering engine (11), the lower end of the double-shaft digital steering engine (11) is connected with the rotary table, the lower end of the rotary table is connected with the single-shaft digital steering engine (8), the single-shaft digital steering engine (8) is arranged above a clamp bottom plate (17), the single-shaft digital steering engine (8) is used for driving the rotary table inner ring to realize 360-degree circumferential rotation, and the double-shaft digital steering engine (11) is used for driving the clamp panel (4) to realize 180-degree direction swing.

2. The automatic clamp for assisting in detecting the microscopic morphology of the surface of the standard component according to claim 1, further comprising a control device, wherein the control device comprises an infrared remote controller and a steering engine controller (18), the steering engine controller (18) is arranged above a clamp bottom plate (17), leads of the single-axis digital steering engine (8) and the double-axis digital steering engine (11) are connected with the steering engine controller (18), and the infrared remote controller controls rotation of the single-axis digital steering engine (8) and the double-axis digital steering engine (11) through the steering engine controller (18).

3. An automated clamp for assisting in detecting microscopic features on a standard component surface according to claim 1, characterized in that two clamp plates (3) are symmetrically arranged on the clamp panel (4), two sliding grooves (14) are arranged on the clamp panel (4), the bottom ends of the two clamp plates (3) are slidably connected with the sliding grooves (14), the clamping device further comprises two hand wheels (1) and two screw rods (2), one end of each screw rod (2) is connected with the hand wheel (1), and the other end of each screw rod (2) is connected with the corresponding clamp plate (3).

4. An automated fixture for aiding in the detection of surface microtopography of a standard according to claim 3, characterised in that the screw (2) is fixed to the fixture panel (4) by a screw nut (13).

5. An automated fixture for aiding in the detection of surface microtopography of a standard according to claim 1, characterised in that the nipper (3) is a flat-nose nipper.

6. An automated fixture for assisting in detecting microscopic features on the surface of a standard part according to claim 1, wherein the driving device further comprises two steering engine plates (9) and a steering engine disc (10), one end of the steering engine plate (9) is connected with the bottom end of the fixture panel (4), the other end of the steering engine plate is connected with a double-shaft digital steering engine (11) through the steering engine disc (10), and the steering engine plate (9) is used for supporting the clamping device to swing in the 180-degree direction;

one end of the other steering gear plate (9) is connected with the top end of the rotary table, the other end of the steering gear plate is connected with the double-shaft digital steering gear (11), and the steering gear plate (9) is used for fixing the double-shaft digital steering gear (11).

7. An automated fixture for aiding in the detection of surface microtopography of a standard according to claim 6, wherein the support means further comprises a table (16), the table (16) comprising, in order from top to bottom, a first placing plate, a second placing plate and a third placing plate, the first placing plate being fixed to the second placing plate by means of screws (5), the lower end of the second placing plate being fixed to the fixture base plate (17) by means of copper studs (7), the third placing plate being fixed to the fixture base plate (17) by means of copper studs (7).

8. The automatic clamp for assisting in detecting the microscopic morphology of the surface of the standard component according to claim 7, wherein the turntable comprises a turntable bearing (12) and round stainless steel plates (15), the round stainless steel plates (15) are respectively arranged at the upper end and the lower end of the turntable bearing (12), the round stainless steel plates (15) are connected to two sides of an inner ring of the turntable bearing (12) through bolts, and the two round stainless steel plates (15) are respectively arranged between the first placing plate and the second placing plate.

9. The automatic clamp for assisting in detecting the microscopic morphology of the surface of the standard component according to claim 8, wherein the driving device further comprises a coupler (6), the lower-end circular stainless steel plate (15) is connected with the single-shaft digital steering engine (8) through the coupler (6), the single-shaft digital steering engine (8) is installed below the third placing plate, and the single-shaft digital steering engine (8) drives the turntable bearing (12) to conduct circumferential rotation through the coupler (6).

10. The application method of the automatic clamp for assisting in detecting the microscopic morphology of the surface of the standard component is characterized by comprising the following specific steps:

s1, before measurement, rotating two hand wheels (1), wherein the hand wheels (1) drive a screw rod (2) to rotate, the screw rod (2) pushes a clamp plate (3) to linearly move on a chute (14) through a screw rod nut (13), the relative positions of the two clamp plates (3) are changed, and the tightness degree of a clamped measured standard piece is adjusted;

s2, when the surface morphology of the curved surface or the inclined surface of the measured standard piece is measured, changing the space position angle of the measured standard piece, wherein the gravity center of the measured standard piece can deviate at the moment, and the clamped measured standard piece is far away from the center of the clamp panel (4) by moving the clamp plate (3), so that the influence caused by the gravity center deviation of the measured standard piece is reduced;

s3, after the tested standard piece is clamped, the single-shaft digital steering engine (8), the double-shaft digital steering engine (11), the steering engine controller (18) and the infrared remote controller are used for controlling and driving the single-shaft digital steering engine (8) and the double-shaft digital steering engine (11) to rotate, a lead wire of the single-shaft digital steering engine (8) and the double-shaft digital steering engine (11) is connected to the steering engine controller (18), a program is written into the steering engine controller (18) and is electrified, and the rotation of the single-shaft digital steering engine (8) and the double-shaft digital steering engine (11) is controlled through the infrared remote controller, so that the spatial position angle of the tested standard piece is changed, and the tested curved surface or inclined surface of the tested standard piece is approximate to a plane.

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