Small and medium hole adjusting rod

Abstract

The invention relates to the field of workpiece inner hole correction and adjustment, in particular to a small and medium hole correction and adjustment rod. The other end of the top end of the operation table is in sliding connection with a placement frame; an electric push rod is assembled at the other end of the interior of the operation table; the output end of the electric push rod is fixed to the placement frame; a workpiece is assembled at one end of the placement frame; a motor is fixed to the outer side of the electromagnetic disc, and a supporting boring rod is clamped to one side in the motor. According to the small and medium hole calibration rod provided by the invention, the electromagnetic disc is started to be adsorbed on the surface of the placement seat, the adsorption position is determined according to the position of a to-be-tested inner hole, and then the cylindrical buckle II and the cylindrical buckle III are rotated to adjust according to the position of the inner hole of a workpiece, so that the dial indicator tests the inner hole of the workpiece; and the extension rod I and the cylindrical buckle I as well as the cylindrical buckle II and the extension rod II stretch out and draw back, so that adjustment can be performed according to the position of the workpiece.

Description

Technical Field

[0001] The invention relates to the field of workpiece inner hole calibration, and in particular to a small and medium-sized hole calibration rod. Background Art

[0002] In the field of mechanical processing, especially in the manufacturing process of shipbuilding and repair products, the inner hole processing accuracy requirements of box parts are often high. In order to ensure the processing quality, the processing benchmark must be confirmed first, and accurate and reliable measurement and adjustment methods must be adopted when calibrating the inner hole. The small and medium hole calibration rod, as a special tool, plays a key role in this process;

[0003] In shipbuilding and repair products, we often encounter workpieces that need to be bored, such as rollers, A-frames, gearboxes and other box parts. First, we need to confirm the processing benchmark. When calibrating the inner hole, we usually need to use a magnetic base, one end of which is adsorbed on the machine tool spindle, and the other end is clamped with a dial indicator. The best calibration position is obtained by adjusting the support rod;

[0004] When using the above technology, the following technical problems were found in the prior art: First, due to the connection method of the dial indicator and the front connecting piece in the prior art, the range occupied by the dial indicator and the front connecting piece is not convenient for testing smaller inner holes, thereby reducing the usability of the dial indicator for testing smaller inner holes; secondly, the magnetic base, connecting rod buckle and knob of the technology itself have a certain volume, which is adsorbed on the outer circle of the spindle, occupying a lot of radial adjustment space of the inner hole, and therefore it is not convenient to perform telescopic adjustment according to the distance of the workpiece of the inner hole being bored; the traditional connection method of supporting the boring bar and the connecting piece is not convenient for telescopic adjustment, thereby occupying the adjustment space of the device, thereby reducing the practicality and convenience of the device. For this reason, we design a small and medium-sized hole adjustment rod to provide another technical solution to the above technical problems. Summary of the invention

[0005] Based on this, it is necessary to provide a small and medium-sized hole calibration rod to address the above technical problems, assemble the workpiece for boring the inner hole on the placement rack, and then start the electric push rod to drive the workpiece for boring the inner hole to adjust to the distance most suitable for the inner hole test, and then start the electromagnetic disk to adsorb on the surface of the placement seat. At this time, the adsorption position is determined according to the position of the inner hole to be tested, and then rotate the cylindrical buckle two and the cylindrical buckle three to adjust according to the position of the inner hole of the workpiece, so that the dial indicator tests the inner hole of the workpiece, and the extension rod one and the cylindrical buckle one and the cylindrical buckle two and the extension rod two are telescoped to facilitate adjustment according to the position of the workpiece, which is convenient for testing and recording the workpiece, greatly improving the practicality and convenience of the device.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A small and medium-sized hole calibration rod comprises an operating table, one end of the top of the operating table is fixed with a placement seat, the other end of the top of the operating table is slidably connected with a placement rack, one end of the placement rack is equipped with a workpiece, one end of the placement seat is magnetically attracted with an electromagnetic disk, a motor is fixed to the outside of the electromagnetic disk, a supporting boring bar is clamped on one side of the inside of the motor, a cylindrical buckle 1 is fixed to one end of the supporting boring bar, an extension rod 1 is slidably connected inside the cylindrical buckle 1, an end of the extension rod 1 away from the supporting boring bar is rotatably connected with a cylindrical buckle 2, an end of the extension rod 1 away from the extension rod 1 is slidably connected with an extension rod 2, an end of the extension rod 2 away from the extension rod 1 is slidably connected with an extension rod 2, an end of the extension rod 2 away from the cylindrical buckle 2 is rotatably connected with a cylindrical buckle 3, and a dial indicator is clamped inside the cylindrical buckle 3.

[0008] As a preferred implementation of the small and medium hole calibration rod provided by the present invention, the other end inside the operating table is equipped with an electric push rod, and the output end of the electric push rod is fixed to the placement rack.

[0009] As a preferred embodiment of the small and medium hole calibration rod provided by the present invention, a positioning mechanism for adjusting the length of an extension rod is provided on the outer side of the cylindrical buckle one, and the positioning mechanism includes a sleeve nut one, and the outer side of the cylindrical buckle one is threadedly connected with a sleeve nut one, the left end of the cylindrical buckle one has a smaller diameter than the right end, and the interior of the support boring bar is slidably connected with an extension rod one.

[0010] As a preferred implementation of the small and medium hole calibration rod provided by the present invention, an anti-slip strip is fixed to the outer side of the extension rod 1, and the outer side of the anti-slip strip is slidably connected to a cylindrical buckle 1.

[0011] As a preferred embodiment of the small and medium hole calibration rod provided by the present invention, a limiting mechanism for adjusting the telescopic extension of the extension rod is arranged inside the cylindrical buckle 2, and the limiting mechanism includes a sleeve nut 2. The diameter of the left end of the cylindrical buckle 2 is smaller than that of the right end, and the outer side of the cylindrical buckle 2 is threadedly connected with a sleeve nut 2 near the extension rod 2.

[0012] As a preferred implementation of the small and medium hole calibration rod provided by the present invention, an anti-skid pad is fixed to the outer side of the second extension rod, and the outer side of the anti-skid pad is slidably connected to the second cylindrical buckle.

[0013] As a preferred embodiment of the small and medium hole calibration rod provided by the present invention, a fixing mechanism for positioning a dial indicator is provided inside the cylindrical buckle three, the left end of the cylindrical buckle three has a smaller diameter than the right end, and a sleeve nut three is threadedly connected to the outer side of the cylindrical buckle three and at one end away from the extension rod two.

[0014] As a preferred embodiment of the small and medium hole calibration rod provided by the present invention, an adjustment mechanism is arranged between the extension rod one and the cylindrical buckle two and between the extension rod two and the cylindrical buckle three, and the adjustment mechanism includes a screw and a nut, and the extension rod one and the cylindrical buckle two and the extension rod two and the cylindrical buckle three are rotatably connected with a screw, and nuts are threadedly connected on both sides of the screw.

[0015] As a preferred implementation of the small and medium hole calibration rod provided by the present invention, anti-slip grooves 1 are fixed on the inner side of the extension rod 1 and both sides of the cylindrical buckle 2.

[0016] As a preferred implementation of the small and medium hole calibration rod provided by the present invention, anti-slip grooves 2 are fixed on the inner side of the second extension rod and on both sides of the second cylindrical buckle.

[0017] It can be seen without a doubt that the above-mentioned technical solution of the present application can definitely solve the technical problem to be solved by the present application.

[0018] At the same time, through the above technical solutions, the present invention has at least the following beneficial effects:

[0019] The present invention provides a small and medium hole calibration rod, which is adsorbed on the surface of the mounting seat by starting the electromagnetic disk. At this time, the adsorption position is determined according to the position of the inner hole to be tested. The extension rod 1 and the cylindrical buckle 2 and the extension rod 2 and the cylindrical buckle 3 are rotated and adjusted. When the position suitable for the dial indicator to test the inner hole of the workpiece is adjusted, the two nuts are rotated to squeeze the extension rod 1 and the extension rod 2 respectively, so as to improve the stability of the dial indicator test.

[0020] By pulling the extension rod 2 to extend in a direction away from the cylindrical buckle 2 and pulling the extension rod 1 to extend in a direction away from the cylindrical buckle 1, and then squeezing the cylindrical buckle 1 and the cylindrical buckle 2 through the sleeve nut 1 and the sleeve nut 2, the stability of the extension rod 1 and the extension rod 2 is improved, and then the adjustment test is performed according to the inner hole distance position of the workpiece;

[0021] The dial indicator is set in a z-shape to facilitate testing of smaller internal holes;

[0022] The extension rod one, cylindrical buckle two, extension rod two and cylindrical buckle three are connected by bolts through nuts and screws, and cylindrical buckle one is slidably connected to the extension rod one and cylindrical buckle two is slidably connected to the extension rod two, and the supporting boring bar is slidably connected to the motor, so that the device is easy to disassemble and replace, which greatly improves the replacement and maintenance effects of the device's parts, thereby reducing the maintenance cost of the device and improving the use cost of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall side structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure between the supporting boring bar, the second cylindrical buckle and the third cylindrical buckle of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure between the electromagnetic disk and the cylindrical buckle 3 of the present invention;

[0028] Figure 5 It is a schematic diagram of the sliding connection structure between the cylindrical buckle 1 and the extension rod 1 of the present invention;

[0029] Figure 6 It is a schematic diagram of the rotation structure between the extension rod 1 and the cylindrical buckle 2 of the present invention;

[0030] Figure 7 It is a schematic diagram of the sliding connection structure between the cylindrical buckle 2 and the extension rod 2 of the present invention;

[0031] Figure 8 It is a schematic diagram of the structure between the extension rod 1 and the cylindrical buckle 2 of the present invention;

[0032] Fig. 9 It is a schematic diagram of the structure between the dial indicator and the cylindrical buckle 3 of the present invention;

[0033] Fig.10 It is a schematic diagram of the structure between the extension rod 2 and the sleeve nut 3 of the present invention.

[0034] In the figure: 1. operating table; 2. placement seat; 3. placement rack; 4. electromagnetic disk; 5. motor; 6. support boring bar; 7. cylindrical buckle one; 8. sleeve nut one; 9. extension rod one; 10. cylindrical buckle two; 11. sleeve nut two; 12. extension rod two; 13. cylindrical buckle three; 14. sleeve nut three; 15. dial indicator; 16. screw; 17. nut; 18. anti-slip pad. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] As described in the background technology, firstly, due to the connection method of the dial indicator clamp and the front connecting piece in the existing technology, the range occupied by the dial indicator and the front connecting piece is not convenient for testing smaller inner holes, thereby reducing the usability of the dial indicator for testing smaller inner holes. Secondly, the magnetic base, connecting rod buckle and knob of the technology have a certain volume, adsorbed on the outer circle of the spindle, occupying a lot of radial adjustment space of the inner hole, so it is not convenient to adjust the distance according to the workpiece of the inner hole being bored. The traditional connection method of supporting the boring bar and the connecting piece is not convenient for extension and contraction, thereby occupying the adjustment space of the device, thereby reducing the practicality and convenience of the device.

[0037] In order to solve this technical problem, the present invention provides a small and medium hole calibration rod.

[0038] Specifically, please refer to Figure 1-Figure 10 , a small and medium hole calibration rod specifically includes:

[0039] The operating table 1 includes an operating table 1, a mounting seat 2 is fixed at one end of the top of the operating table 1, and the mounting seat 2 is used to fix the electromagnetic disk 4, providing a stable installation position for the electromagnetic disk 4, so that the electromagnetic disk 4 can be firmly adsorbed on the operating table 1, ensuring that the motor 5 and its subsequent devices will not move or shake during the test process, improving the stability of the test, and thus stably supporting the motor 5 and the subsequent test devices, the other end of the top of the operating table 1 is slidably connected with a placement frame 3, the other end inside the operating table 1 is equipped with an electric push rod, the output end of the electric push rod is fixed to the placement frame 3, one end of the placement frame 3 is equipped with a workpiece, and the electromagnetic disk 4 is magnetically attracted to one end of the mounting seat 2. A motor 5 is fixed to the outside of 4, and a supporting boring rod 6 is clamped on one side of the inside of the motor 5. The supporting boring rod 6 is the main component connecting the motor 5 and the dial indicator 15, and plays the role of supporting and transmitting power. A cylindrical buckle 17 is fixed to one end of the supporting boring rod 6, and an extension rod 19 is slidably connected inside the cylindrical buckle 17. An end of the extension rod 19 away from the supporting boring rod 6 is rotatably connected to a cylindrical buckle 2 10, an extension rod 2 12 is slidably connected to the end of the cylindrical buckle 2 10 away from the extension rod 19, and a cylindrical buckle 3 13 is rotatably connected to the end of the extension rod 2 12 away from the cylindrical buckle 2 10, and a dial indicator 15 is clamped inside the cylindrical buckle 3 13.

[0040] The present invention provides a small and medium-sized hole calibration rod, which is assembled on a placement rack 3 by assembling a workpiece whose inner hole is to be bored, and then starting an electric push rod to drive the workpiece whose inner hole is to be bored to adjust to a distance most suitable for inner hole testing, and then starting an electromagnetic disk 4 to be adsorbed on the surface of a placement seat 2. At this time, the adsorption position is determined according to the position of the inner hole to be tested, and then rotating cylindrical buckle 2 10 and cylindrical buckle 3 13 to adjust according to the position of the inner hole of the workpiece, so that the dial indicator 15 tests the inner hole of the workpiece, and the extension rod 1 9 and cylindrical buckle 1 7 and cylindrical buckle 2 10 and extension rod 2 12 are telescoped to facilitate adjustment according to the position of the workpiece, facilitate test recording of the workpiece, and greatly improve the practicality and convenience of the device.

[0041] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0042] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] Embodiment 1

[0045] Please refer to Figure 1-Figure 5A small and medium-sized hole calibration rod comprises an operating table 1, a mounting seat 2 is fixed at one end of the top of the operating table 1, the mounting seat 2 is used to fix the electromagnetic disk 4, and provides a stable installation position for the electromagnetic disk 4, so that the electromagnetic disk 4 can be firmly adsorbed on the operating table 1, ensuring that the motor 5 and its subsequent devices will not move or shake during the test, thereby improving the stability of the test, thereby stably supporting the motor 5 and the subsequent test devices, the other end of the top of the operating table 1 is slidably connected with a placement frame 3, the other end inside the operating table 1 is equipped with an electric push rod, the output end of the electric push rod is fixed to the placement frame 3, one end of the placement frame 3 is equipped with a workpiece, one end of the mounting seat 2 is magnetically attracted with the electromagnetic disk 4, the outer side of the electromagnetic disk 4 is fixed with the motor 5, and one side of the inside of the motor 5 is clamped with a supporting boring rod 6. The supporting boring rod 6 is the main component connecting the motor 5 and the dial indicator 15, and plays the role of supporting and transmitting power. A cylindrical buckle 7 is fixed at one end of the supporting boring rod 6, and the inner sliding of the cylindrical buckle 7 An extension rod 19 is connected, and one end of the extension rod 19 away from the supporting boring rod 6 is rotatably connected to a cylindrical buckle 2 10, and one end of the cylindrical buckle 2 10 away from the extension rod 19 is slidably connected to an extension rod 2 12, and one end of the extension rod 2 12 away from the cylindrical buckle 2 10 is rotatably connected to a cylindrical buckle 3 13, and a dial indicator 15 is clamped inside the cylindrical buckle 3 13. The dial indicator 15 can obtain the accurate size and shape parameters of the inner hole of the workpiece through the precise measurement of the dial indicator, which provides an important basis for subsequent processing and quality control. Through the telescopic adjustment of the extension rod 19, the position of the dial indicator 15 can be further adjusted so that it can accurately contact the inner hole of the workpiece. Through the adjustment of the cylindrical buckle 2 10, the length and angle of the extension rod 2 12 can be conveniently adjusted to adapt to the shape and position of the inner hole of different workpieces. Through the fixing effect of the cylindrical buckle 3 13, it can be ensured that the dial indicator 15 will not move or shake during the test, thereby improving the accuracy and stability of the test.

[0046] When in use, the workpiece whose inner hole is to be bored is assembled on the placement rack 3, and then the electric push rod is started to drive the workpiece whose inner hole is to be bored to adjust to the distance most suitable for the inner hole test, and then the electromagnetic disk 4 is started to be adsorbed on the surface of the placement seat 2. At this time, the adsorption position is determined according to the position of the inner hole to be tested, and then the cylindrical buckle 2 10 and the cylindrical buckle 3 13 are rotated to adjust according to the position of the inner hole of the workpiece, so that the dial indicator 15 tests the inner hole of the workpiece, and the extension rod 1 9 and the cylindrical buckle 1 7 and the cylindrical buckle 2 10 and the extension rod 2 12 are extended and retracted, so as to facilitate adjustment according to the position of the workpiece, and to facilitate the test and recording of the workpiece, thereby greatly improving the practicality and convenience of the device;

[0047] A positioning mechanism for adjusting the length of the extension rod 9 is arranged on the outer side of the cylindrical buckle 7. The positioning mechanism includes a sleeve nut 8. The outer side of the cylindrical buckle 7 is threadedly connected with the sleeve nut 8. When the sleeve nut 8 is rotated, it will generate pressure on the cylindrical buckle 7, and then fix the position of the extension rod 9 through friction, so as to achieve precise adjustment and fixation of the length. The left end of the cylindrical buckle 7 has a smaller diameter than the right end. The extension rod 9 is slidably connected to the interior of the support boring bar 6. The outer side of the extension rod 9 is fixed with an anti-slip strip. The outer side of the anti-slip strip is slidably connected with the cylindrical buckle 7 to prevent the extension rod 9 from accidentally slipping off during the sliding process, thereby improving the stability and safety of the adjustment.

[0048] Specifically, when the extension rod 9 needs to be telescopically adjusted, the sleeve nut 8 is rotated to move away from the extension rod 9, and the extension rod 9 gradually generates pressure on the surface of the cylindrical buckle 7, and then the extension rod 9 is pulled to extend away from the cylindrical buckle 7, so as to drive the dial indicator 15 to adjust according to the inner hole of the workpiece;

[0049] A limiting mechanism for adjusting the extension and retraction of the extension rod 12 is arranged inside the cylindrical buckle 10, and the limiting mechanism includes a sleeve nut 11. The diameter of the left end of the cylindrical buckle 10 is smaller than that of the right end. The outer side of the cylindrical buckle 10 is threadedly connected with the sleeve nut 11 near the extension rod 12. When the sleeve nut 11 is rotated, it will generate pressure on the cylindrical buckle 10, and then fix the position of the extension rod 12 by friction, so as to achieve precise adjustment and fixation of the length. The outer side of the extension rod 12 is fixed with an anti-skid pad 18, and the outer side of the anti-skid pad 18 is slidably connected with the cylindrical buckle 10 to prevent the extension rod 12 from accidentally slipping off during the sliding process, thereby improving the stability and safety of the adjustment.

[0050] Further, when the extension rod 12 needs to be adjusted, the sleeve nut 11 is turned to move toward a position close to the cylindrical buckle 10, and the extension rod 12 is pulled to extend away from the cylindrical buckle 10. Therefore, the extension rod 12 drives the cylindrical buckle 3 13 and the dial indicator 15 to test the inner hole of the workpiece.

[0051] A fixing mechanism for positioning the dial indicator 15 is provided inside the cylindrical buckle three 13. The left end of the cylindrical buckle three 13 has a smaller diameter than the right end. The outer side of the cylindrical buckle three 13 and one end away from the extension rod two 12 is threadedly connected with a sleeve nut three 14. By placing the dial indicator 15 inside the cylindrical buckle three 13 and ensuring that the dial indicator 15 can be stably fixed inside the cylindrical buckle three 13 while providing sufficient supporting force to resist vibration and impact during the test, the sleeve nut three 14 is rotated to squeeze the cylindrical buckle three 13, and then the cylindrical buckle three 13 is assembled with the dial indicator 15 to facilitate the replacement of the dial indicator 15.

[0052] Embodiment 2

[0053] Please refer to Figure 5-Figure 10 , a small and medium hole calibration rod, an adjustment mechanism is arranged between the extension rod 1 9 and the cylindrical buckle 2 10 and the extension rod 2 12 and the cylindrical buckle 3 13, the adjustment mechanism includes a screw 16 and a nut 17, the extension rod 1 9 and the cylindrical buckle 2 10 and the extension rod 2 12 and the cylindrical buckle 3 13 are rotatably connected with the screw 16, and the two sides of the screw 16 are threadedly connected with nuts 17, the inner side of the extension rod 1 9 and the two sides of the cylindrical buckle 2 10 are fixed with anti-slip grooves 1, and the inner side of the extension rod 2 12 and the two sides of the cylindrical buckle 2 10 are fixed with anti-slip grooves 2, and the extension rod 1 9 and the cylindrical buckle 2 10 and the extension rod 2 12 and the cylindrical buckle 3 13 are rotated and adjusted, when the dial indicator 15 is adjusted to a suitable position for testing the inner hole of the workpiece, the two nuts 17 are rotated to squeeze the extension rod 1 9 and the extension rod 2 12 respectively, so as to facilitate the stability of the adjustment of the lifting device;

[0054] The above-mentioned nut 17 and screw rod 16 use bolts to connect the extension rod 1 9, cylindrical buckle 2 10, extension rod 2 12 and cylindrical buckle 3 13, and the cylindrical buckle 1 7 is slidably connected with the extension rod 1 9 and the cylindrical buckle 2 10 is slidably connected with the extension rod 2 12, and supports the sliding engagement of the boring bar 6 and the motor 5, so that it is convenient to disassemble and replace the device, which greatly improves the replacement and maintenance effect of the parts of the device, thereby reducing the maintenance cost of the device and improving the use cost of the device.

[0055] The use process of the small and medium hole calibration rod provided by the present invention is as follows:

[0056] Working principle: When in use, assemble the workpiece for boring inner hole on the placement rack 3, and then start the electric push rod to drive the workpiece for boring inner hole to adjust to the distance most suitable for inner hole testing, and then start the electromagnetic disk 4 to adsorb on the surface of the placement seat 2. At this time, the adsorption position is determined according to the position of the inner hole to be tested, and the extension rod 1 9 and the cylindrical buckle 2 10 and the extension rod 2 12 and the cylindrical buckle 3 13 are rotated and adjusted. When the position is adjusted to the appropriate position for the dial indicator 15 to test the inner hole of the workpiece, the two nuts 17 are rotated to squeeze the extension rod 1 9 and the extension rod 2 12 respectively, so as to improve the stability of the device adjustment;

[0057] When it is necessary to adjust the length of the device for adjusting the position of the inner hole of the workpiece, the extension rod 12 is pulled to extend in the direction away from the cylindrical buckle 10, and the extension rod 9 is pulled to extend in the direction away from the cylindrical buckle 7, and then the cylindrical buckle 7 and the cylindrical buckle 10 are squeezed through the sleeve nut 8 and the sleeve nut 11 to improve the stability of the extension rod 9 and the extension rod 12, and then the adjustment test is performed according to the inner hole distance position of the workpiece.

[0058] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A small and medium hole calibration rod, characterized in that: The invention comprises an operating table (1), wherein a placement seat (2) is fixed at one end of the top of the operating table (1), a placement frame (3) is slidably connected to the other end of the top of the operating table (1), a workpiece is mounted on one end of the placement frame (3), an electromagnetic disk (4) is magnetically attracted to one end of the placement seat (2), a motor (5) is fixed to the outside of the electromagnetic disk (4), a support boring rod (6) is clamped on one side of the inside of the motor (5), a cylindrical buckle (7) is fixed to one end of the support boring rod (6), and the workpiece is mounted on one end of the placement frame (3). The cylindrical buckle 1 (7) is slidably connected to an extension rod 1 (9) inside, and the end of the extension rod 1 (9) away from the supporting boring bar (6) is rotatably connected to a cylindrical buckle 2 (10), the end of the cylindrical buckle 2 (10) away from the extension rod 1 (9) inside is slidably connected to an extension rod 2 (12), the end of the extension rod 2 (12) away from the cylindrical buckle 2 (10) is rotatably connected to a cylindrical buckle 3 (13), and a dial indicator (15) is clamped inside the cylindrical buckle 3 (13).

2. A small and medium hole calibration rod according to claim 1, characterized in that: The other end inside the operating table (1) is equipped with an electric push rod, and the output end of the electric push rod is fixed to the placement rack (3).

3. A small and medium hole calibration rod according to claim 2, characterized in that: The outer side of the cylindrical buckle (7) is provided with a positioning mechanism for adjusting the length of the extension rod (9), and the positioning mechanism comprises a sleeve nut (8). The outer side of the cylindrical buckle (7) is threadedly connected with the sleeve nut (8), the left end of the cylindrical buckle (7) has a smaller diameter than the right end, and the interior of the support boring bar (6) is slidably connected with the extension rod (9).

4. A small and medium hole calibration rod according to claim 3, characterized in that: The outer side of the extension rod 1 (9) is fixed with an anti-slip strip, and the outer side of the anti-slip strip is slidably connected to the cylindrical buckle 1 (7).

5. The small and medium hole calibration rod according to claim 2, characterized in that: A limiting mechanism for adjusting the extension and retraction of the extension rod 2 (12) is arranged inside the cylindrical buckle 2 (10), and the limiting mechanism comprises a sleeve nut 2 (11). The diameter of the left end of the cylindrical buckle 2 (10) is smaller than that of the right end. The outer side of the cylindrical buckle 2 (10) is threadedly connected with the sleeve nut 2 (11) near the extension rod 2 (12).

6. A small and medium hole calibration rod according to claim 5, characterized in that: The outer side of the second extension rod (12) is fixed with an anti-skid pad (18), and the outer side of the anti-skid pad (18) is slidably connected to the second cylindrical buckle (10).

7. The small and medium hole calibration rod according to claim 2, characterized in that: A fixing mechanism for positioning a dial indicator (15) is arranged inside the cylindrical buckle three (13); the left end of the cylindrical buckle three (13) has a smaller diameter than the right end; and a sleeve nut three (14) is threadedly connected to the outer side of the cylindrical buckle three (13) and one end away from the extension rod two (12).

8. The small and medium hole calibration rod according to claim 7, characterized in that: An adjustment mechanism is provided between the extension rod 1 (9) and the cylindrical buckle 2 (10) and between the extension rod 2 (12) and the cylindrical buckle 3 (13), and the adjustment mechanism comprises a screw rod (16) and a nut (17). The extension rod 1 (9) and the cylindrical buckle 2 (10) and between the extension rod 2 (12) and the cylindrical buckle 3 (13) are both rotatably connected with the screw rod (16), and the nuts (17) are threadedly connected on both sides of the screw rod (16).

9. The small and medium hole calibration rod according to claim 8, characterized in that: The inner side of the extension rod 1 (9) and both sides of the cylindrical buckle 2 (10) are fixed with anti-slip grooves 1.

10. The small and medium hole calibration rod according to claim 8, characterized in that: The inner side of the second extension rod (12) and the two sides of the second cylindrical buckle (10) are both fixed with anti-slip grooves.

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