Installation method of closed absolute type linear time grating

Abstract

The invention discloses an installation method of a closed absolute type linear time grating, and the method comprises the steps: obtaining a linear time grating main body and a linear time grating reading head, and installing the linear time grating main body on an installation plane; a time grating auxiliary positioning device is obtained, one side of the time grating auxiliary positioning device is provided with a connecting plane I, the time grating auxiliary positioning device is installed at the bottom of the linear time grating body, and positioning of the connecting plane I relative to the linear time grating body in the width direction is adjusted; a connecting piece is obtained, the connecting piece is provided with a connecting plane II, the connecting piece is installed on the time grating auxiliary positioning device, the connecting plane II is fixed to the connecting plane I, and then fixation between the connecting piece and the mobile end of the to-be-measured equipment is completed; taking down the time grating auxiliary positioning device; an installation gap piece is obtained, the installation gap piece is inserted into the position between the linear time grating reading head and the linear time grating body, and then the linear time grating reading head is fixedly connected to the connecting plane II; and taking out the mounting gap piece to finish mounting.

Description

Technical Field

[0001] The invention relates to the technical field of sensor installation, and in particular to an installation method of a closed absolute linear time grid. Background Art

[0002] In the field of precision measurement and automatic control, closed linear time-grating products are widely used as encoders in various CNC machine tools and automatic measurement equipment to provide accurate position information. However, the accuracy of the relative position between the reading head and the time-grating scale of closed linear products has a great impact on their performance. The traditional use of a dial indicator to adjust the position between the reading head and the time-grating scale of closed linear products is not only time-consuming and laborious, but also cannot confirm the installation position of the connector on the mobile end of the measured equipment, resulting in low overall installation efficiency. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide a method for installing a closed absolute linear time grating that can not only realize the installation and positioning of the connecting parts on the mobile end of the measured device, but also reduce the difficulty of installing the linear time grating reading head and improve the installation efficiency.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: A method for installing a closed absolute linear time grid comprises the following steps: (1) Obtain a linear time-grid body and a linear time-grid reading head, install the linear time-grid body on a mounting plane, adjust the parallelism between the length direction of the linear time-grid body and the moving direction of the moving end of the device to be measured, and fix the linear time-grid body on the mounting plane after the relevant parameters are met; (2) Obtain a time grid auxiliary positioning device, one side of which has a connection plane I for connecting with the mobile end of the device to be measured, install the time grid auxiliary positioning device on the bottom of the linear time grid body, and adjust the position of the connection plane I relative to the linear time grid body in the width direction, and then fix the time grid auxiliary positioning device on the linear time grid body; (3) Obtain a connecting piece having a connecting plane II for connecting with a linear time grating reading head, install the connecting piece on the time grating auxiliary positioning device, fix the connecting plane II on the connecting plane I, and then move the mobile end of the device to be measured to the position where the time grating auxiliary positioning device is located, thereby completing the connection and fixation between the connecting piece and the mobile end of the device to be measured; (4) Loosen the fixing between the auxiliary positioning device of the time grid and the connecting piece, and remove the auxiliary positioning device of the time grid; (5) Place the linear time scale reading head under the linear time scale body, obtain the installation gap sheet, the installation gap between the linear time scale reading head and the linear time scale body is consistent with the thickness of the installation gap sheet, insert the installation gap sheet into the position between the linear time scale reading head and the linear time scale body, so that the linear time scale reading head presses the installation gap sheet on the bottom surface of the linear time scale body, and then fix the linear time scale reading head on the connection plane II; (6) Remove the installation gap piece and complete the installation.

[0005] As an optimization, in step (2), the time grid auxiliary positioning device includes a shell having the same shape as the linear time grid reading head, and a fixed card block and a movable card block are arranged at intervals on the top of the shell along the width direction of the linear time grid body. The fixed card block and the shell are an integrally formed structure, and the movable card block is movably connected to the shell. The shell can be fixedly connected to the linear time grid body by the fixed card block and the movable card block on both side surfaces of the linear time grid body along its width direction. When the fixed card block and the movable card block are clamped on the linear time grid body, the positioning of the connection plane I is completed.

[0006] As an optimization, the fixed block is a strip structure extending in the length direction of the grid body when parallel to the straight line, and the movable blocks are two in number and are arranged at intervals in the length direction of the grid body when parallel to the straight line.

[0007] As an optimization, the shell is fixedly connected with coaxially arranged rotating shafts on the inner side walls at both ends along the length direction of the linear time grid body, and the center line direction of the rotating shaft is parallel to the length direction of the linear time grid body. The two movable clamping blocks are respectively rotatably connected to the two rotating shafts and can rotate around the center line directions of their corresponding rotating shafts. A clamping head is protruded on the movable clamping block, and a clamping slot is opened at a position corresponding to the clamping head on the shell. When the movable clamping block rotates, the clamping head can extend out of its corresponding clamping slot. One side edge of the movable clamping block is recessed with The movable recess, the two ends of the shell are respectively provided with screwing posts corresponding to the positions of the movable clamping block, the screwing posts pass through the side wall of the shell on its side along a direction parallel to the center line of the rotating shaft and are rotatably connected with it, a protrusion at one end of the screwing post located in the shell is formed with a crankshaft, and the connecting rod journal on the crankshaft passes through the movable recess, when the screwing post rotates around its center line direction, the connecting rod journal on the crankshaft can abut against the side of the movable recess and can drive the movable clamping block to rotate, so that the clamping head can pass through the clamping slot and be clamped on the linear time grid body.

[0008] As an optimization, an inner hexagonal hole which is arranged coaxially with the screw column is recessed on an end surface of one end of the screw column outside the shell.

[0009] As an optimization, in step (5), after placing the linear time grid reading head below the linear time grid body, the linear time grid reading head is installed on the connecting plane II using bolts, and the tightness between the linear time grid reading head and the connecting piece is adjusted so that the linear time grid reading head has a movable distance in the up and down directions relative to the linear time grid body, and then the installation gap piece is inserted into the position between the linear time grid reading head and the linear time grid body, so that the linear time grid reading head presses the installation gap piece on the bottom surface of the linear time grid body, and then the bolts between the linear time grid reading head and the connecting piece are tightened.

[0010] Compared with the prior art, the present invention has the following beneficial effects: the time grid auxiliary positioning device in the present invention is fixedly connected to the linear time grid body to realize the positioning of the connection plane I in the width direction of the linear time grid body, and then the installation positioning of the connecting part on the mobile end of the device to be measured can be determined; and then the control of the distance between the linear time grid body and the linear time grid reading head is realized through the quantitative installation gap piece, thereby ensuring the accuracy of the relative position of the linear time grid body and the linear time grid reading head, which is more convenient, accurate, reliable, efficient and has good applicability than the traditional installation mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the connection between the time grid auxiliary positioning device and the linear time grid main body in the present invention; Figure 2 It is a structural schematic diagram of the connection between the time grid auxiliary positioning device and the connecting piece in the present invention; Figure 3 It is a schematic diagram of the placement structure of the spacer installed in the present invention; Figure 4 It is a structural schematic diagram of the time grid auxiliary positioning device in the present invention; Figure 5 It is a schematic diagram of the installation structure of the movable card block in the present invention. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0013] like Figures 1 to 5 As shown, the installation method of the closed absolute linear time grid in this specific embodiment includes the following steps: (1) Obtain a linear time-grid body 1 and a linear time-grid reading head 2, install the linear time-grid body 1 on a mounting plane, adjust the parallelism between the length direction of the linear time-grid body 1 and the moving direction of the moving end of the device to be measured, and after the relevant parameters are met, fix the linear time-grid body 1 on the mounting plane; (2) Obtain a time grid auxiliary positioning device, one side of which has a connection plane I for connecting with the mobile end of the device to be measured, install the time grid auxiliary positioning device on the bottom of the linear time grid body 1, and adjust the position of the connection plane I relative to the linear time grid body 1 in the width direction, and then fix the time grid auxiliary positioning device on the linear time grid body 1; (3) Obtain a connecting member 3, which has a connecting plane II for connecting with the linear time grating reading head 2, and install the connecting member 3 on the time grating auxiliary positioning device so that the connecting plane II is fixed on the connecting plane I, and then move the mobile end of the device to be measured to the position where the time grating auxiliary positioning device is located, so as to complete the connection and fixation between the connecting member 3 and the mobile end of the device to be measured; (4) Loosen the fixing between the time grid auxiliary positioning device and the connecting member 3, and remove the time grid auxiliary positioning device; (5) Place the linear time grid reading head 2 below the linear time grid body 1, obtain the installation gap piece 4, the installation gap between the linear time grid reading head 2 and the linear time grid body 1 is consistent with the thickness of the installation gap piece 4, insert the installation gap piece 4 into the position between the linear time grid reading head 2 and the linear time grid body 1, so that the linear time grid reading head 2 presses the installation gap piece 4 on the bottom surface of the linear time grid body 1, and then fix the linear time grid reading head 2 on the connection plane II; (6) Remove the installation gap piece 4 and complete the installation.

[0014] In this specific embodiment, in step (2), the time grid auxiliary positioning device includes a shell 5 having the same shape as the linear time grid reading head, and a fixed block 6 and a movable block 7 are arranged at intervals on the top of the shell 5 along the width direction of the linear time grid body 1. The fixed block 6 and the shell 1 are an integrally formed structure, and the movable block 7 is movably connected to the shell 5. The shell 5 can be fixedly connected to the linear time grid body 1 by the fixed block 6 and the movable block 7 being clamped on both side surfaces of the linear time grid body 1 along its width direction. When the fixed block 6 and the movable block 7 are clamped on the linear time grid body 1, the positioning of the connection plane I is completed.

[0015] In this specific embodiment, the fixed block 6 is a strip structure extending along the length direction of the grid body 1 parallel to the straight line, and the movable blocks 7 are two in number and are spaced apart along the length direction of the grid body 1 parallel to the straight line.

[0016] In this specific embodiment, the shell 5 is fixedly connected to the inner side walls at both ends of the length direction of the linear time grid body 1 with coaxially arranged rotating shafts 8, and the center line direction of the rotating shaft 8 is parallel to the length direction of the linear time grid body 1. The two movable clamping blocks 7 are respectively rotatably connected to the two rotating shafts 8 and can rotate around the center line direction of their corresponding rotating shafts 8. A clamping head 9 is protruded on the movable clamping block 7, and a bayonet is opened at a position corresponding to the clamping head 9 on the shell 5. When the movable clamping block 7 rotates, the clamping head 9 can extend out of its corresponding bayonet, and one side edge of the movable clamping block 7 is recessed with an movable The movable recess is provided with screwing posts 10 at both ends of the shell 1 corresponding to the positions of the movable clamping block 7. The screwing posts 10 pass through the side wall of the shell 5 on its side in a direction parallel to the center line of the rotating shaft 8 and are rotatably connected thereto. A protrusion at one end of the screwing post 10 located in the shell 5 is formed with a crankshaft 11, and the connecting rod journal on the crankshaft 11 passes through the movable recess. When the screwing post 10 rotates around its center line, the connecting rod journal on the crankshaft 11 can abut against the side of the movable recess and can drive the movable clamping block 7 to rotate, so that the clamping head 9 can pass through the bayonet and be clamped on the linear time grid body 1.

[0017] In the present specific embodiment, a hexagonal hole which is arranged coaxially with the screw post 10 is recessed on an end surface of one end of the screw post 10 which is located outside the housing 5 .

[0018] In this specific implementation, in step (5), after the linear time grid reading head 2 is placed below the linear time grid body 1, the linear time grid reading head 2 is installed on the connecting plane II using bolts, and the tightness between the linear time grid reading head 2 and the connecting member 3 is adjusted so that the linear time grid reading head 2 has a movable distance in the up and down directions relative to the linear time grid body 1, and then the installation gap piece 4 is inserted into the position between the linear time grid reading head 2 and the linear time grid body 1, so that the linear time grid reading head 2 presses the installation gap piece 4 on the bottom surface of the linear time grid body 1, and then the bolts between the linear time grid reading head 2 and the connecting member 3 are tightened.

[0019] In the specific implementation process, when the linear time grid body is installed on the installation plane, the parallelism between the linear time grid body and the moving end of the device to be measured is less than 0.05mm / m, and the flatness between the linear time grid body and the installation plane is less than 0.05mm / m. When installing the time grid auxiliary positioning device, first clamp the fixed clamp block on the groove on one side of the linear time grid body along its length direction, and then insert the hexagonal wrench into the corresponding hexagonal hole to screw the screw column, so that the connecting rod journal on the crankshaft in the shell abuts against one side of the active recess, and then push the active clamp block to rotate around the rotating shaft, so that the clamp head rotates out of the corresponding clamping mouth and is clamped on the groove on the other side of the linear time grid body, so as to fix the time grid auxiliary positioning device; then when the time grid auxiliary positioning device needs to be removed, the screw column needs to be reversed, and the connecting rod journal on the crankshaft abuts against the other side of the active recess, so as to realize the reverse rotation of the clamp head.

[0020] A plurality of positioning holes respectively connected to the shell are arranged on the connecting plane I, the number and positions of the positioning holes are respectively consistent with the number and positions of the threaded holes on the side surface of the linear time grating reading head fixed to the connecting piece, and an internal threaded tube fixedly connected to the shell and coaxial with the corresponding positioning hole is arranged at the position corresponding to each positioning hole in the shell, so that the time grating auxiliary positioning device and the connecting piece can be fixedly connected by bolts, thereby achieving the effect that the time grating auxiliary positioning device simulates the linear time grating reading head.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Those skilled in the art should understand that those modifications or equivalent substitutions of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution should be included in the scope of the claims of the present invention.

Claims

1. A method for installing a closed absolute linear time grid, characterized in that: The following steps are involved: (1) Obtain a linear time-grid body and a linear time-grid reading head, install the linear time-grid body on a mounting plane, adjust the parallelism between the length direction of the linear time-grid body and the moving direction of the moving end of the device to be measured, and fix the linear time-grid body on the mounting plane after the relevant parameters are met; (2) Obtain a time grid auxiliary positioning device, one side of which has a connection plane I for connecting with the mobile end of the device to be measured, install the time grid auxiliary positioning device on the bottom of the linear time grid body, and adjust the position of the connection plane I relative to the linear time grid body in the width direction, and then fix the time grid auxiliary positioning device on the linear time grid body; (3) Obtain a connecting piece having a connecting plane II for connecting with a linear time grating reading head, install the connecting piece on the time grating auxiliary positioning device, fix the connecting plane II on the connecting plane I, and then move the mobile end of the device to be measured to the position where the time grating auxiliary positioning device is located, thereby completing the connection and fixation between the connecting piece and the mobile end of the device to be measured; (4) Loosen the fixing between the auxiliary positioning device of the time grid and the connecting piece, and remove the auxiliary positioning device of the time grid; (5) Place the linear time scale reading head under the linear time scale body, obtain the installation gap sheet, the installation gap between the linear time scale reading head and the linear time scale body is consistent with the thickness of the installation gap sheet, insert the installation gap sheet into the position between the linear time scale reading head and the linear time scale body, so that the linear time scale reading head presses the installation gap sheet on the bottom surface of the linear time scale body, and then fix the linear time scale reading head on the connection plane II; (6) Remove the installation gap piece and complete the installation.

2. The method for installing a closed absolute linear time grid according to claim 1, characterized in that: In step (2), the time grid auxiliary positioning device includes a shell having the same shape as the linear time grid reading head, and a fixed card block and a movable card block are arranged at intervals on the top of the shell along the width direction of the linear time grid body. The fixed card block and the shell are an integrally formed structure, and the movable card block is movably connected to the shell. The shell can be fixedly connected to the linear time grid body by the fixed card block and the movable card block on both side surfaces of the linear time grid body along its width direction. When the fixed card block and the movable card block are clamped on the linear time grid body, the positioning of the connection plane I is completed.

3. The method for installing a closed absolute linear time grid according to claim 2, characterized in that: The fixed block is a strip structure extending in the length direction of the grid body parallel to the straight line, and the movable blocks are two in number and are arranged at intervals in the length direction of the grid body parallel to the straight line.

4. The method for installing a closed absolute linear time grid according to claim 3, characterized in that: The shell is fixedly connected with coaxially arranged rotating shafts on the inner side walls at both ends along the length direction of the linear time grid body, and the center line direction of the rotating shaft is parallel to the length direction of the linear time grid body. The two movable clamping blocks are rotatably connected to the two rotating shafts and can rotate around the center line directions of their corresponding rotating shafts. A clamping head is protruded on the movable clamping block, and a clamping slot is opened at a position corresponding to the clamping head on the shell. When the movable clamping block rotates, the clamping head can extend out of its corresponding clamping slot. A movable clamping block is recessed on one side of the side The notch is provided with screwing posts at both ends of the shell corresponding to the positions of the movable block respectively. The screwing posts pass through the side wall of the shell on its side in a direction parallel to the center line of the rotating shaft and are rotatably connected with it. A protrusion at one end of the screwing post located in the shell is formed with a crankshaft, and the connecting rod journal on the crankshaft passes through the movable notch. When the screwing post rotates around its center line, the connecting rod journal on the crankshaft can abut against the side of the movable notch and can drive the movable block to rotate, so that the clamping head can pass through the bayonet and be clamped on the linear time grid body.

5. The method for installing a closed absolute linear time grid according to claim 4, characterized in that: The end surface of the screwing post located outside the shell is concavely provided with an inner hexagonal hole which is arranged coaxially with the screwing post.

6. The method for installing a closed absolute linear time grid according to claim 1, characterized in that: In step (5), after placing the linear time grid reading head below the linear time grid body, the linear time grid reading head is mounted on the connecting plane II using bolts, and the tightness between the linear time grid reading head and the connecting piece is adjusted so that the linear time grid reading head has a movable distance in the up and down directions relative to the linear time grid body. Then, the installation gap piece is inserted into the position between the linear time grid reading head and the linear time grid body so that the linear time grid reading head presses the installation gap piece on the bottom surface of the linear time grid body, and then the bolts between the linear time grid reading head and the connecting piece are tightened.

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