Grating length measuring machine ultra-high straightness high-precision guide rail

Abstract

This invention discloses a high-precision guide rail for an optical grating length measuring machine with ultra-high straightness. It includes a marble base, a linear guide rail structure, a tailstock, a measuring head, side rods, and a display screen. The guide rail is mounted on the marble base, the tailstock is fixed to one end of the marble base, and the measuring head is slidably mounted on the guide rail and used in conjunction with the tailstock. Two sets of side rods are respectively mounted on the tailstock and the measuring head. The display screen is mounted on one side of the marble base. A worktable is also mounted on the guide rail. The linear guide rail structure includes a guide rail body, an optical grating measurement component, a straightness monitoring mechanism, and a scale optical grating surface cleaner. One side of the guide rail body is connected to the optical grating measurement component. The optical grating measurement component includes an optical grating reading head mounted on the measuring head and a scale optical grating body used in conjunction with the optical grating reading head. The high-precision guide rail structure designed in this invention can achieve real-time monitoring of the guide rail and high-precision maintenance of the optical grating component, improving the guiding effect of the guide rail on the measuring head.

Description

Technical Field

[0001] This invention relates to the field of length measuring machine technology, specifically to a high-precision guide rail with ultra-high straightness for a grating length measuring machine. Background Technology

[0002] A length measuring machine is an optical length measuring tool that uses the scale of a linear scale or the wavelength of light as the known length and performs contact measurement using a mechanical probe. It features an adjustable worktable that can move within three coordinates and rotate within two coordinates, and comes with various probes and accessories. It is commonly used to calibrate large gauge blocks and measure the internal and external dimensions of various workpieces. To achieve accurate measurement of the workpiece, length measuring machines are usually equipped with an optical grating ruler, a measurement feedback device that utilizes the optical principles of an optical grating. Optical grating rulers are frequently used in closed-loop servo systems of CNC machine tools for detecting linear or angular displacement. Their measurement output signal is a digital pulse, characterized by a large detection range, high detection accuracy, and fast response speed. For example, in CNC machine tools, they are often used to detect the coordinates of the tool and workpiece to observe and track tool travel errors, thus compensating for tool movement errors. Optical grating rulers are classified into transmission gratings and reflection gratings according to their manufacturing methods and optical principles.

[0003] However, existing grating length measuring machines have the following problems during workpiece measurement: the straightness and accuracy of the guide rail used to guide the measuring head directly affect the measurement accuracy; during the process of guiding the measuring head along the guide rail, vibrations generated by the machine body during operation may cause a decrease in the accuracy of the guide rail for the measuring head, and there is a lack of corresponding monitoring methods. Furthermore, the grating ruler used in conjunction with the guide rail for distance measurement is affected by dirt on its surface during machine operation, which can impact the accuracy of distance measurement. Therefore, it is necessary to design corresponding technical solutions to address these technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a high-precision guide rail with ultra-high straightness for a grating length measuring machine. This solves the problem that the straightness and accuracy of the guide rail used to guide the measuring head directly affect the accuracy of the measurement. During the process of guiding the measuring head along the guide rail, the vibration generated by the machine body during operation may cause the accuracy of the guide rail for the measuring head to decrease. There is a lack of corresponding monitoring methods. In addition, the grating ruler used in conjunction with the guide rail is used for distance measurement. When there is dirt on the surface of the grating ruler during the operation of the machine body, it will affect the accuracy of the distance measurement.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-precision guide rail for an optical grating length measuring machine with ultra-high straightness, comprising a marble base, a linear guide rail structure, a tailstock, a measuring headstock, side rods, and a display screen. The guide rail is mounted on the marble base, the tailstock is fixed to one end of the marble base, the measuring headstock is slidably mounted on the linear guide rail structure and used in conjunction with the tailstock, the side rods are divided into two sets and respectively mounted on the tailstock and the measuring headstock, the display screen is mounted on one side of the marble base, and a worktable is also mounted on the guide rail. The linear guide structure includes a guide body, a grating measurement assembly, a straightness monitoring mechanism, and a scale grating surface cleaner. One side of the guide body is connected to the grating measurement assembly. The grating measurement assembly includes a grating reading head mounted on a measuring head base and a scale grating body used in conjunction with the grating reading head. The scale grating body is mounted on one side of the guide body. The straightness monitoring mechanism is mounted on the edge of the grating reading head and faces the edge of the guide body. The scale grating surface cleaner is provided in two sets and symmetrically mounted at both ends of the grating reading head.

[0006] The straightness monitoring mechanism includes a mounting plate, conductive sheets, contact sheet one, contact sheet two, an insulating connecting plate, and an indicator light. The mounting plate is fixed to the side of the guide rail body. The conductive sheets are arranged in several groups and evenly on the mounting plate. Contact sheet one and contact sheet two are symmetrically distributed above and below the conductive sheets. Contact sheet two is connected to an external power supply. The insulating connecting plate is fixed to the outer ends of contact sheet one and contact sheet two and fixed to the grating reading head. Contact sheet one is connected to the indicator light through a circuit. The indicator light is installed on the grating reading head.

[0007] The scale grating surface cleaner includes a housing, a motor, a rotating rod, a cleaning sleeve, a suction tube, a suction hood, a sludge guide tube, an exhaust fan, and a drain pipe. The housing is fixed to the end of the grating reading head and has a cleaning cavity inside. The motor is installed on one side of the housing and its power output end is connected to the rotating rod. The rotating rod is rotatably installed in the cleaning cavity. The cleaning sleeve is fitted onto the rotating rod. The suction tube is built into the cleaning cavity and located on one side of the rotating rod. The lower part of the suction tube is connected to several suction hoods. The end of the suction tube is connected to the sludge guide tube. The exhaust fan is installed at the end of the sludge guide tube and its air outlet is connected to the drain pipe.

[0008] In a preferred embodiment of the present invention, the first contact piece and the second contact piece are arranged in parallel and both are made of conductive material, and the inner ends of the first contact piece and the second contact piece are in contact with the conductive sheet.

[0009] In a preferred embodiment of the present invention, a sealing gasket is provided at the bottom edge of the housing, and the sealing gasket is in contact with the scale grating body.

[0010] In a preferred embodiment of the present invention, the cleaning sleeve includes a sponge outer sleeve and a plurality of cleaning strips formed on the surface of the sponge outer sleeve. The cleaning strips have a raised structure and the lower cleaning strip is in contact with the surface of the scale grating body.

[0011] In a preferred embodiment of the present invention, the suction cover has a trumpet-shaped structure with a lower diameter larger than the upper diameter, and two adjacent sets of suction covers are equidistantly distributed. The suction cover is located directly above the scale grating body and the gap between the two is 0.5cm-1cm.

[0012] In a preferred embodiment of the present invention, the sewage pipe is generally L-shaped and has an outlet at its outer end, with the outlet opening downwards.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. This invention improves the structure of the grating length measuring machine by designing a high-precision guide rail structure. This high-precision guide rail includes a guide rail body, a grating measurement component, a straightness monitoring mechanism, and a scale grating surface cleaner. During the process of guiding the measuring head seat through the guide rail body, the straightness of the guide rail body can be monitored in real time by the straightness monitoring mechanism installed on the edge of the grating measurement component. When there is fluctuation in the guide rail body, the straightness monitoring mechanism can quickly detect it and send a signal, which facilitates the staff to stop the machine for maintenance. In addition, the scale grating surface cleaner installed at both ends of the grating reading head can move synchronously with the grating reading head. During the movement, it can efficiently clean any dirt that may exist on the scale grating surface, thereby ensuring the accuracy of the measurement by the grating measurement component.

[0015] 2. The high-precision guide rail structure designed in this invention can realize real-time monitoring of the guide rail and high-precision maintenance of the grating assembly, thereby improving the guide rail's guiding effect on the measuring head. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of the present invention;

[0017] Figure 2 This is a structural diagram of the linear guide rail structure described in this invention;

[0018] Figure 3 This is a structural diagram of the straightness monitoring mechanism described in this invention;

[0019] Figure 4 This is a cross-sectional view of the straightness monitoring mechanism described in this invention;

[0020] Figure 5 This is a structural diagram of the scale grating surface cleaner described in this invention.

[0021] In the diagram: 1. Marble base; 2. Linear guide rail structure; 3. Tailstock; 4. Measuring head base; 5. Side rod; 6. Display screen; 7. Workbench; 8. Guide rail body; 9. Grating measurement assembly; 10. Straightness monitoring mechanism; 11. Scale grating surface cleaner; 12. Grating reading head; 13. Scale grating body; 14. Mounting plate; 15. Conductive sheet; 16. Contact piece one; 17. Contact piece two; 18. Insulating connection plate; 19. Indicator light; 20. Housing; 21. Motor; 22. Rotating rod; 23. Cleaning sleeve; 24. Suction pipe; 25. Suction hood; 26. Sewage guide pipe; 27. Exhaust fan; 28. Sewage pipe; 29. ​​Cleaning inner cavity; 30. Sealing gasket; 31. Sponge cover; 32. Cleaning strip; 33. Outlet. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1-5 This invention provides a technical solution: a high-precision guide rail for an optical grating length measuring machine with ultra-high straightness, comprising a marble base 1, a linear guide rail structure 2, a tailstock 3, a measuring head 4, side rods 5, and a display screen 6. The linear guide rail structure 2 is mounted on the marble base 1, the tailstock 3 is fixed to one end of the marble base 1, the measuring head 4 is slidably mounted on the linear guide rail structure 2 and used in conjunction with the tailstock 3, the side rods 5 are divided into two sets and respectively mounted on the tailstock 3 and the measuring head 4, the display screen 6 is mounted on one side of the marble base 1, and a worktable 7 is also mounted on the guide rail. The linear guide rail structure 2 includes... The guide rail body 8, the grating measurement assembly 9, the straightness monitoring mechanism 10, and the scale grating surface cleaner 11 are provided. One side of the guide rail body 8 is connected to the grating measurement assembly 9. The grating measurement assembly 9 includes a grating reading head 12 installed on the measuring head base 4 and a scale grating body 13 used in conjunction with the grating reading head 12. The scale grating body 13 is installed on one side of the guide rail body 8. The straightness monitoring mechanism 10 is installed on the edge of the grating reading head 12 and is directly opposite the edge of the guide rail body 8. The scale grating surface cleaner 11 is provided in two sets and is symmetrically installed at both ends of the grating reading head 12.

[0024] The straightness monitoring mechanism 10 includes a mounting plate 14, conductive sheets 15, contact sheet one 16, contact sheet two 17, an insulating connecting plate 18, and indicator lights 19. The mounting plate 14 is fixed to the side of the guide rail body 8. The conductive sheets 15 are arranged in several groups and evenly on the mounting plate 14. Contact sheet one 16 and contact sheet two 17 are symmetrically distributed above and below the conductive sheets 15. Contact sheet two 17 is connected to an external power supply. The insulating connecting plate 18 is fixed to the outer ends of contact sheet one 16 and contact sheet two 17 and fixed to the grating reading head 12. Contact piece 16 is connected to indicator light 19 via a circuit. Indicator light 19 is mounted on the grating reading head 12. During the movement of the measuring head base 4, if the machine body vibrates and causes the linear guide rail structure 2 to vibrate, contact piece 16, contact piece 27 and conductive piece 15 will tend to separate. At this time, indicator light 19 will turn off. Conversely, if the linear guide rail structure 2 is well guided, the current is transmitted through contact piece 27 to conductive piece 15 and then to contact piece 16. The current is then transmitted to indicator light 19 via the circuit, and the indicator light will turn on.

[0025] The scale grating surface cleaner 11 includes a housing 20, a motor 21, a rotating rod 22, a cleaning sleeve 23, a suction tube 24, a suction hood 25, a sludge guide tube 26, an exhaust fan 27, and a drain pipe 28. The housing 20 is fixed to the end of the grating reading head 12 and has a cleaning cavity 29 inside. The motor 21 is installed on one side of the housing 20 and its power output end is connected to the rotating rod 22. The rotating rod 22 is rotatably installed in the cleaning cavity. The cleaning sleeve 23 is fitted onto the rotating rod 22. The suction tube 24 is built into the cleaning cavity 29 and located on one side of the rotating rod 22. The lower part of the suction tube 24 is connected to several sets of suction hoods 25. The end of the tube is connected to the guide pipe 26. The exhaust fan 27 is installed at the end of the guide pipe 26 and its outlet is connected to the drain pipe 28. When it is necessary to clean the surface of the scale grating body 13, the motor 21 drives the rotating rod 22 to rotate. During the rotation of the rotating rod 22, the cleaning sleeve 23 rotates synchronously. The cleaning sleeve 23 can clean the dirt that may be on the surface of the scale grating body 13 as it rotates with the rotating rod 22. At the same time, the exhaust fan 27 draws the airflow outward. The dirt is adsorbed by the suction hood 25 to the suction pipe 24 and discharged through the guide pipe 26 and the drain pipe 28, thus completing the purpose of automated cleaning.

[0026] Further improvements, such as Figure 3 and 4 As shown, contact piece 16 and contact piece 17 are arranged parallel to each other and both are made of conductive material. The inner ends of contact piece 16 and contact piece 17 are in contact with conductive piece 15 to achieve conductivity.

[0027] Further improvements, such as Figure 5As shown, a sealing gasket 30 is provided at the bottom edge of the outer casing 20. The sealing gasket 30 is in contact with the scale grating body 13 to improve the internal sealing and prevent dirt from leaking out during the cleaning process of the scale grating body 13.

[0028] Further improvements, such as Figure 5 As shown, the cleaning sleeve 23 includes a sponge cover 31 and several sets of cleaning strips 32 formed on the surface of the sponge cover 31. The cleaning strips 32 have a raised structure and the lower cleaning strips 32 are in contact with the surface of the scale grating body 13. The cleaning sleeve 23 can clean the dirt that may be present on the surface of the scale grating body 13 as it rotates with the rotating rod 22.

[0029] Further improvements, such as Figure 5 As shown, the suction hood 25 has a trumpet-shaped structure with a lower diameter larger than the upper diameter. Two adjacent suction hoods 25 are equidistantly distributed. The suction hood 25 is located directly above the scale grating body 13 with a gap of 0.5cm-1cm between them. The suction hood 25 is used to suction and clean the dirt that has been swept up.

[0030] Specifically, the drain pipe 28 has an L-shaped structure and an outlet 33 at its outer end. The outlet 33 faces downwards, which facilitates the external discharge of the cleaned dirt.

[0031] During use: If the linear guide structure 2 vibrates due to vibration of the machine body during the movement of the measuring head 4, the contact piece 16, contact piece 27 and conductive piece 15 will tend to separate, and the indicator light 19 will turn off. Conversely, if the linear guide structure 2 is well guided, the current is transmitted through the contact piece 27 to the conductive piece 15 and then to the contact piece 16, and the current is transmitted to the indicator light 19 through the circuit, and the indicator light will turn on, achieving the purpose of real-time monitoring of the guide rail. When it is necessary to clean the surface of the scale grating body 13, the motor 21 drives the rotating rod 22 to rotate. During the rotation of the rotating rod 22, the cleaning sleeve 23 rotates synchronously. The cleaning sleeve 23 can clean the dirt that may be on the surface of the scale grating body 13 during the rotation of the rotating rod 22. At the same time, the exhaust fan 27 draws the air out, and the dirt is adsorbed by the suction hood 25 to the suction pipe 24 and discharged through the sewage pipe 28 along the sewage guide pipe 26, completing the purpose of automated cleaning.

[0032] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0033] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-precision guide rail for an optical grating length measuring machine with ultra-high straightness, comprising a marble base (1), a linear guide rail structure (2), a tailstock (3), a measuring headstock (4), side rods (5), and a display screen (6), wherein the linear guide rail structure (2) is mounted on the marble base (1), the tailstock (3) is fixed to one end of the marble base (1), the measuring headstock (4) is slidably mounted on the linear guide rail structure (2) and used in conjunction with the tailstock (3), the side rods (5) are divided into two groups and respectively mounted on the tailstock (3) and the measuring headstock (4), the display screen (6) is mounted on one side of the marble base (1), and a worktable (7) is also mounted on the guide rail, characterized in that: The linear guide structure (2) includes a guide body (8), a grating measurement component (9), a straightness monitoring mechanism (10), and a scale grating surface cleaner (11). One side of the guide body (8) is connected to the grating measurement component (9). The grating measurement component (9) includes a grating reading head (12) mounted on a measuring head base (4) and a scale grating body (13) used in conjunction with the grating reading head (12). The scale grating body (13) is mounted on one side of the guide body (8). The straightness monitoring mechanism (10) is mounted on the edge of the grating reading head (12) and faces the edge of the guide body (8). The scale grating surface cleaner (11) is provided in two sets and symmetrically mounted at both ends of the grating reading head (12). The straightness monitoring mechanism (10) includes a mounting plate (14), conductive sheets (15), contact sheet one (16), contact sheet two (17), insulating connecting plate (18), and indicator light (19). The mounting plate (14) is fixed to the side of the guide rail body (8). The conductive sheets (15) are divided into several groups and evenly arranged on the mounting plate (14). The contact sheet one (16) and contact sheet two (17) are symmetrically distributed above and below the conductive sheets (15). The contact sheet two (17) is connected to an external power supply. The insulating connecting plate (18) is fixed to the outer ends of the contact sheet one (16) and contact sheet two (17) and fixed to the grating reading head (12). The contact sheet one (16) is connected to the indicator light (19) through a line. The indicator light (19) is installed on the grating reading head (12). The scale grating surface cleaner (11) includes a housing (20), a motor (21), a rotating rod (22), a cleaning sleeve (23), a suction pipe (24), a suction hood (25), a sludge guide pipe (26), a blower (27), and a drain pipe (28). The housing (20) is fixed to the end of the grating reading head (12) and has a cleaning cavity (29) formed inside. The motor (21) is installed on one side of the housing (20) and its power output end is connected to the rotating rod (22). The rotating rod (22) is rotatably installed in the cleaning cavity. The cleaning sleeve (23) is fitted onto the rotating rod (22). The suction tube (24) is built into the cleaning cavity (29) and located on one side of the rotating rod (22). The lower part of the suction tube (24) is connected to several sets of suction hoods (25). The end of the suction tube (24) is connected to the sewage guide tube (26). The exhaust fan (27) is installed at the end of the sewage guide tube (26) and its air outlet is connected to the sewage discharge tube (28).

2. The high-precision guide rail for an optical grating length measuring machine with ultra-high straightness according to claim 1, characterized in that: The first contact piece (16) and the second contact piece (17) are arranged in parallel and both are made of conductive material. The inner ends of the first contact piece (16) and the second contact piece (17) are in contact with the conductive sheet (15).

3. The high-precision guide rail for an optical grating length measuring machine with ultra-high straightness according to claim 1, characterized in that: A sealing gasket (30) is provided at the bottom edge of the outer shell (20), and the sealing gasket (30) is in contact with the scale grating body (13).

4. The high-precision guide rail for ultra-high straightness of a grating length measuring machine according to claim 1, characterized in that: The cleaning sleeve (23) includes a sponge cover (31) and a number of cleaning strips (32) formed on the surface of the sponge cover (31). The cleaning strips (32) have a raised structure and the cleaning strips (32) located below are in contact with the surface of the scale grating body (13).

5. A high-precision guide rail with ultra-high straightness for a grating length measuring machine according to claim 3, characterized in that: The suction hood (25) has a trumpet-shaped structure and the diameter at the lower end is larger than the diameter at the upper end. Two adjacent sets of suction hoods (25) are equidistantly distributed. The suction hood (25) is located directly above the scale grating body (13) and the gap between the two is 0.5cm-1cm.

6. The high-precision guide rail for an optical grating length measuring machine with ultra-high straightness according to claim 1, characterized in that: The sewage pipe (28) has an L-shaped structure and an outlet (33) is formed at the outer end, with the outlet (33) facing downwards.

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