Rocker drill precise positioning device

Abstract

The application provides a precise positioning device for a radial drilling machine, a first positioning plate is provided with a first avoiding hole for a drill bit to pass through, and the first positioning plate is arranged above a workpiece to be drilled; a supporting leg is arranged at the bottom of the first positioning plate, the bottom end of the supporting leg is detachably arranged on a workbench of the radial drilling machine, and the supporting leg is arranged in a telescopic mode; a second positioning plate is arranged above the first positioning plate in a sliding mode along a vertical direction, the middle part of the second positioning plate is provided with a second avoiding hole for the drill bit to pass through, a plurality of guide rods are arranged at the top of the first positioning plate, and the guide rods pass through the second positioning plate, one of the guide rods is provided with a scale, and the frictional force between the guide rods and the second positioning plate is greater than the gravity of the second positioning plate. According to the application, when the drill bit abuts against the surface of the workpiece to be drilled, the drill clamp of the radial drilling machine abuts against the top of the second positioning plate, and the position of the second positioning plate can be determined according to the scale on the guide rod, so that the drilling depth is accurately controlled.

Description

Technical Field

[0001] This application belongs to the field of positioning tooling technology, and more specifically, relates to a precision positioning device for a radial drilling machine. Background Technology

[0002] In the field of machining, radial drilling machines are widely used for hole machining operations on small and medium-sized workpieces due to their structural features, such as drilling through holes or blind holes of different specifications on plate and box-type workpieces.

[0003] Blind hole machining requires extremely high precision in drilling depth. For example, in gearbox housing machining, the depth of blind holes must be strictly controlled within the design tolerance range, with an error typically less than ±0.1mm. If the depth is too shallow, subsequent assembled parts will not be able to fit effectively; if the depth is too deep, it may penetrate the inner wall of the workpiece, damaging the structural integrity of the workpiece and causing it to be scrapped. However, existing radial drilling machines have significant shortcomings in drilling depth positioning, making it difficult to meet the needs of high-precision machining. Although some radial drilling machines are equipped with simple depth limiting devices, they are mostly fixed structures and cannot be flexibly adjusted according to the drilling depth requirements of different workpieces, resulting in poor versatility. Moreover, the limiting accuracy is low, and the actual drilling depth deviates significantly from the set value due to factors such as mechanical clearance and vibration, making it difficult to meet the needs of high-precision machining scenarios. Utility Model Content

[0004] The purpose of this application is to provide a precision positioning device for a radial drilling machine to improve drilling accuracy.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: A precision positioning device for a radial drilling machine is provided, comprising a first positioning plate, a support leg, a second positioning plate, and multiple guide columns. The first positioning plate has a first clearance hole at its center for the drill bit to pass through, and is positioned above the workpiece to be drilled. The support leg is located at the bottom of the first positioning plate, and its bottom end is detachably mounted on the worktable of the radial drilling machine. The support leg is telescopically oriented. The second positioning plate is slidably positioned above the first positioning plate in a vertical direction. The second positioning plate has a second clearance hole at its center for the drill bit to pass through. When the drill bit abuts against the surface of the workpiece to be drilled, the drill chuck of the radial drilling machine abuts against the top of the second positioning plate. Multiple guide rods are located at the top of the first positioning plate, and the guide rods pass through the second positioning plate. One of the guide rods has a scale, and the frictional force between the guide rod and the second positioning plate is greater than the weight of the second positioning plate.

[0006] In one possible implementation, the top of the second positioning plate is rotatably provided with a damage prevention ring, which is coaxially arranged with the second clearance hole, and the damage prevention ring is used for the drill chuck of the radial drilling machine to abut against it.

[0007] In one possible implementation, the top of the second positioning plate is provided with a damage prevention groove, the damage prevention groove is coaxially arranged with the second clearance hole, the side wall of the damage prevention groove is provided with a limiting groove, the side wall of the damage prevention ring is provided with a limiting ring, a portion of the damage prevention ring is inserted into the damage prevention groove, and the limiting ring is inserted into the limiting groove.

[0008] In one possible implementation, the bottom of the support leg is provided with a permanent magnet, which is used to attract and fix it to the worktable of the radial drilling machine.

[0009] In one possible implementation, the support leg includes a telescopic rod and a telescopic cylinder, the top end of the telescopic rod is fixed to the bottom of the first positioning plate, the bottom end of the telescopic cylinder is rotatably mounted on the permanent magnet, and a portion of the telescopic rod is screwed into the telescopic cylinder.

[0010] In one possible implementation, the permanent magnet has a telescopic hole at its top, a fixing groove on the side wall of the telescopic hole, a telescopic column at the bottom of the telescopic cylinder, a fixing ring on the side wall of the telescopic column, a portion of the telescopic column being inserted into the telescopic hole, and the fixing ring being inserted into the fixing groove.

[0011] In one possible implementation, a plurality of return springs are provided between the first positioning plate and the second positioning plate. When the elastic force of the return spring on the second positioning plate is equal to the frictional force between the second positioning plate and the guide rod, the first positioning plate and the second positioning plate are arranged at intervals.

[0012] In one possible implementation, the first positioning plate is provided with a plurality of through holes, and the bottom of the first positioning plate is provided with a plurality of receiving cylinders, the receiving cylinders corresponding one to one with the through holes, the through holes and the corresponding receiving cylinders being arranged coaxially, the bottom end of the return spring being fixed inside the receiving cylinder, and the return spring being able to be completely retracted into the receiving cylinder due to pressure.

[0013] In one possible implementation, a first mounting plate is provided on both sides of the first positioning plate, and a guide rod is provided on the top of the first mounting plate. The guide rod includes a rigid rod and a rubber structure on the surface of the rigid rod. A second mounting plate is provided on both sides of the second positioning plate, and an insertion hole is provided on the second mounting plate. The guide rod is inserted into the insertion hole, and the guide rod is interference-fitted with the insertion hole.

[0014] In one possible implementation, the top of the guide rod is provided with an anti-detachment post, the diameter of which is larger than the diameter of the insertion hole.

[0015] The advantages of the precision positioning device for a radial drilling machine provided in this application are as follows: Compared with the prior art, this application, through the setting of a first positioning plate and a second positioning plate, allows the drill chuck of the radial drilling machine to abut against the top of the second positioning plate when the drill bit abuts against the surface of the workpiece to be drilled. At this time, the position of the second positioning plate can be determined according to the scale on the guide rod, thereby precisely controlling the drilling depth. The support legs are telescopically arranged, allowing the height of the first positioning plate to be adjusted according to workpieces of different heights, making the device suitable for processing workpieces of various specifications and improving the versatility of the device. At the same time, the relative sliding structure between the first and second positioning plates also allows the relative position between the second and first positioning plates to be adjusted when processing holes with different depth requirements, enhancing its adaptability to different workpieces. The setting of multiple guide rods provides stable guidance for the sliding of the second positioning plate, ensuring that the second positioning plate moves accurately in the vertical direction, avoiding shaking and offset, thereby ensuring the accuracy of drilling depth positioning. Moreover, the friction between the guide rod and the second positioning plate is greater than the weight of the second positioning plate, allowing the second positioning plate to remain stable after being set in position and not to move arbitrarily due to gravity interference. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the precision positioning device for a radial drilling machine provided in an embodiment of this application; Figure 2 A schematic diagram of the structure of the precise positioning device for the radial drilling machine provided in the embodiments of this application during operation; Figure 3 This is a schematic diagram of the structure of the damage prevention ring provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the anti-damage groove provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the telescopic column provided in the embodiments of this application; Figure 6 This is a schematic diagram of the structure of the expansion joint provided in an embodiment of this application.

[0018] The labels for the attached figures are as follows: 1. First positioning plate; 2. Support leg; 3. Second positioning plate; 4. Guide rod; 5. Drill bit; 101. First clearance hole; 102. Return spring; 103. Receiving cylinder; 104. First mounting plate; 201. Permanent magnet; 202. Telescopic rod; 203. Telescopic cylinder; 204. Telescopic hole; 205. Fixing groove; 206. Telescopic column; 207. Fixing ring; 301. Second clearance hole; 302. Damage protection ring; 303. Limiting ring; 304. Limiting groove; 305. Damage protection groove; 306. Second mounting plate; 307. Anti-detachment column; 401. Scale; 501. Drill chuck. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] It should be further noted that the accompanying drawings and embodiments of this application mainly describe the concept of this application. Based on this concept, some specific forms and arrangements of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of this application, they can implement the above-mentioned specific forms and arrangements in a well-known manner.

[0021] When a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0022] The terms “length”, “width”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, 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 application 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 limitations on this application.

[0023] The terms "first" and "second" 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0024] The precise positioning device for radial drilling machines provided in this application will now be described.

[0025] Please refer to the following: Figures 1 to 6 The radial drilling machine's precision positioning device includes a first positioning plate 1, a support leg 2, a second positioning plate 3, and multiple guide rods. The first positioning plate 1 has a first clearance hole 101 at its center for the drill bit 5 to pass through, and is positioned above the workpiece to be drilled. The support leg 2 is located at the bottom of the first positioning plate 1, and its bottom end is detachably mounted on the worktable of the radial drilling machine. The support leg 2 is telescopically oriented. The second positioning plate 3 slides vertically above the first positioning plate 1, and has a second clearance hole 301 at its center for the drill bit 5 to pass through. When the drill bit 5 abuts against the surface of the workpiece to be drilled, the drill chuck 501 of the radial drilling machine abuts against the top of the second positioning plate 3. Multiple guide rods 4 are located at the top of the first positioning plate 1 and pass through the second positioning plate 3. One guide rod 4 has a scale 401 on it, and the friction between the guide rod 4 and the second positioning plate 3 is greater than the weight of the second positioning plate 3.

[0026] The beneficial effects of the radial drilling machine precision positioning device provided in this embodiment are as follows: Compared with the prior art, the radial drilling machine precision positioning device provided in this embodiment, through the setting of the first positioning plate 1 and the second positioning plate 3, allows the drill bit 5 to abut against the surface of the workpiece to be drilled, while the drill chuck 501 of the radial drilling machine abuts against the top of the second positioning plate 3. At this time, the position of the second positioning plate 3 can be determined according to the scale 401 on the guide rod 4, thereby precisely controlling the drilling depth. The support leg 2 is telescopically arranged, which can adjust the height of the first positioning plate 1 according to workpieces of different heights, making the device applicable to the processing of workpieces of various specifications and improving the versatility of the device. At the same time, the relative sliding structure between the first positioning plate 1 and the second positioning plate 3 also allows the relative position between the second positioning plate 3 and the first positioning plate 1 to be adjusted when processing holes with different depth requirements, enhancing its adaptability to different workpieces. The setting of multiple guide rods 4 provides stable guidance for the sliding of the second positioning plate 3, ensuring that the second positioning plate 3 moves accurately in the vertical direction, avoiding shaking and offset, thereby ensuring the accuracy of drilling depth positioning. Moreover, the friction between the guide rod 4 and the second positioning plate 3 is greater than the weight of the second positioning plate 3, which makes the second positioning plate 3 stable after it is set in position and will not move arbitrarily due to gravity interference.

[0027] In this embodiment, the top of the second positioning plate 3 is provided with a damage prevention ring 302. The damage prevention ring 302 is coaxially arranged with the second clearance hole 301. The damage prevention ring 302 is used for the drill chuck 501 of the radial drilling machine to abut.

[0028] During drilling, the drill chuck 501 rotates at high speed with the spindle. If it directly and rigidly contacts the second positioning plate 3, it will cause wear and denting on the top of the positioning plate, resulting in a shift in the subsequent contact position. The anti-damage ring 302 converts sliding friction into rolling friction through rotational characteristics. Moreover, accuracy can be restored simply by replacing the worn anti-damage ring 302, without having to replace the entire second positioning plate 3, thus significantly reducing maintenance costs. The anti-damage ring 302 and the second clearance hole 301 are arranged coaxially to ensure that the drill chuck 501 always pushes the second positioning plate 3 along the axial direction, avoiding tilting of the positioning plate due to contact eccentricity and maintaining the linear correspondence of depth detection. This design is particularly suitable for continuous batch processing scenarios.

[0029] Combination Figure 1 , Figure 3 and Figure 4 As shown, the top of the second positioning plate 3 is provided with a damage prevention groove 305. The damage prevention groove 305 and the second clearance hole 301 are arranged coaxially. The side wall of the damage prevention groove 305 is provided with a limiting groove 304. The side wall of the damage prevention ring 302 is provided with a limiting ring 303. Part of the damage prevention ring 302 is inserted into the damage prevention groove 305, and the limiting ring 303 is inserted into the limiting groove 304.

[0030] The cooperation between the limiting ring 303 and the limiting groove 304 restricts the vertical displacement of the anti-damage ring 302, preventing the axial pressure of the drill chuck 501 during drilling from causing the anti-damage ring 302 to sink into the positioning plate or pop out, ensuring that the contact position between the drill chuck 501 and the anti-damage ring 302 is always fixed, and further reducing the depth detection error. The interlocking structure creates a rigid connection between the anti-damage ring 302 and the second positioning plate 3, preventing relative wobbling under drilling vibration and maintaining the stability of depth detection. Simultaneously, this structure facilitates the disassembly and replacement of the anti-damage ring 302, balancing stability and ease of maintenance.

[0031] In this embodiment, a permanent magnet 201 is provided at the bottom of the support leg 2, which is used to attract and fix it to the worktable of the radial drilling machine.

[0032] The permanent magnet 201 can be directly attached to the iron worktable of the radial drilling machine, achieving fixation without bolts or other fasteners, thus reducing installation time. Disassembly requires only external force, making it far more efficient than mechanical clamping structures. The magnetic force of the permanent magnet 201 can resist the cutting forces and vibrations generated during drilling, preventing displacement of the support leg 2.

[0033] In addition, the support leg 2 includes a telescopic rod 202 and a telescopic cylinder 203. The top end of the telescopic rod 202 is fixed to the bottom of the first positioning plate 1, and the bottom end of the telescopic cylinder 203 is rotatably mounted on the permanent magnet 201. A portion of the telescopic rod 202 is screwed into the telescopic cylinder 203.

[0034] The screw connection between the telescopic rod 202 and the telescopic cylinder 203 allows the length of the support leg 2 to be infinitely adjusted by rotating the telescopic cylinder 203. The adjustment accuracy is much higher than that of the traditional snap-on telescopic structure, ensuring that the distance between the first positioning plate 1 and the workpiece surface is precise and controllable. The threaded structure has a natural self-locking property, and once adjusted to the correct position, it can maintain a stable length without the need for additional locking components, preventing the support leg 2 from extending or retracting on its own due to drilling vibration. At the same time, the design of the telescopic cylinder 203 rotating on the permanent magnet 201 eliminates the need to move the permanent magnet 201 during adjustment, further simplifying the operation process.

[0035] like Figure 5 and Figure 6 As shown, the top of the permanent magnet 201 is provided with a telescopic hole 204, the side wall of the telescopic hole 204 is provided with a fixing groove 205, the bottom end of the telescopic cylinder 203 is provided with a telescopic column 206, the side wall of the telescopic column 206 is provided with a fixing ring 207, a portion of the telescopic column 206 is inserted into the telescopic hole 204, and the fixing ring 207 is inserted into the fixing groove 205.

[0036] The cooperation between the telescopic column 206 and the telescopic hole 204, combined with the engagement of the fixing ring 207 and the fixing groove 205, allows the telescopic cylinder 203 to rotate only around its axis and prevent it from moving vertically. This avoids the axial force during drilling causing the telescopic cylinder 203 to separate from the permanent magnet 201, ensuring the overall length stability of the support leg 2. The engagement of the fixing ring 207 and the fixing groove 205 increases the contact area between the telescopic cylinder 203 and the permanent magnet 201, allowing the force on the support leg 2 to be transmitted to the worktable through multiple points, reducing component deformation caused by local stress concentration.

[0037] Combination Figure 1 and Figure 2 As shown, a plurality of return springs 102 are provided between the first positioning plate 1 and the second positioning plate 3. When the elastic force of the return spring 102 on the second positioning plate 3 is equal to the frictional force between the second positioning plate 3 and the guide rod 4, the first positioning plate 1 and the second positioning plate 3 are arranged at intervals.

[0038] After drilling is completed, when the drill chuck 501 rises, the elastic force of the return spring 102 pushes the second positioning plate 3 back up along the guide rod 4 until the elastic force and friction force are balanced, restoring the initial interval state. This avoids the need for manual lifting and resetting. While the friction between the guide rod 4 and the second positioning plate 3 can prevent the plate from sliding down due to its own weight, it may also increase the feed resistance of the drill chuck 501. The balance design of the return spring 102's elasticity and friction ensures that the second positioning plate 3 is in a state of force balance at the beginning of drilling, and will not tend to tilt due to the push of the drill chuck 501.

[0039] In this embodiment, the first positioning plate 1 is provided with multiple through holes, and the bottom of the first positioning plate 1 is provided with multiple receiving cylinders 103. The receiving cylinders 103 correspond one-to-one with the through holes, and the through holes and the corresponding receiving cylinders 103 are arranged coaxially. The bottom end of the return spring 102 is fixed inside the receiving cylinder 103, and the return spring 102 can be completely stored inside the receiving cylinder 103 due to pressure.

[0040] The return spring 102 can be completely housed within the receiving cylinder 103. When the drilling depth is large and the second positioning plate 3 descends to be in contact with the first positioning plate 1, the spring will not be exposed due to compression, thus avoiding contact with the drill bit 5, drill chuck 501, or workpiece. This design adapts to drilling requirements of different depths, and is especially suitable for blind hole machining with a depth exceeding the spacing between the positioning plates. like Figure 1 As shown, the first positioning plate 1 has a first mounting plate 104 on both sides, and a guide rod 4 is provided on the top of the first mounting plate 104. The guide rod 4 includes a rigid rod and a rubber structure on the surface of the rigid rod. The second positioning plate 3 has a second mounting plate 306 on both sides, and an insertion hole is provided on the second mounting plate 306. The guide rod 4 is inserted into the insertion hole, and the guide rod 4 is interference-fitted with the insertion hole.

[0041] Specifically, the rubber structure can be cylindrical, fitted onto the outside of the rigid rod, and fixed with adhesive. The elastic properties of the rubber material allow the interference fit friction force to be precisely set by adjusting the interference amount, ensuring that the friction force is always greater than the weight of the second positioning plate 3 and less than the thrust of the drill chuck 501. Compared to a hard metal fit, the deformation capacity of rubber can compensate for minor machining errors and maintain stable friction force. The interference fit between the rubber guide rod 4 and the insertion hole eliminates the mechanical clearance between them, preventing the positioning plate from shaking due to drilling vibration. At the same time, the damping properties of the rubber material can absorb some of the vibration energy, further reducing the interference of vibration on depth detection. Furthermore, the softness of the rubber reduces rigid friction between the guide rod 4 and the socket. The interference fit creates a sealing effect that prevents chips from entering the mating surface, extending the service life of the guide structure and reducing maintenance frequency. Finally, the top of the guide rod 4 is equipped with an anti-detachment post 307, the diameter of which is larger than the diameter of the insertion hole. When resetting or replacing the workpiece after drilling, if the spring force of the reset spring 102 is too large or improper operation causes the second positioning plate 3 to rise rapidly, the anti-detachment post 307 can limit its maximum stroke through the diameter difference, preventing the second positioning plate 3 from falling off the top of the guide rod 4 and causing damage to the parts or safety hazards to personnel.

[0042] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A precision positioning device for a radial drilling machine, characterized in that, include: The first positioning plate (1) has a first clearance hole (101) in the center for the drill bit (5) to pass through, and the first positioning plate (1) is located above the workpiece to be drilled; Support leg (2) is located at the bottom of the first positioning plate (1). The bottom end of the support leg (2) is detachably mounted on the worktable of the radial drilling machine. The support leg (2) is telescopically oriented. The second positioning plate (3) is slidably disposed above the first positioning plate (1) in the vertical direction. The second positioning plate (3) has a second clearance hole (301) in the middle for the drill bit (5) to pass through. When the drill bit (5) abuts against the surface of the workpiece to be drilled, the drill chuck (501) of the radial drilling machine abuts against the top of the second positioning plate (3). Multiple guide rods (4) are provided on the top of the first positioning plate (1), and the guide rods (4) pass through the second positioning plate (3). One of the guide rods (4) is provided with a scale (401). The friction between the guide rod (4) and the second positioning plate (3) is greater than the weight of the second positioning plate (3).

2. The precision positioning device for a radial drilling machine as described in claim 1, characterized in that: The top of the second positioning plate (3) is provided with a damage prevention ring (302), which is coaxially arranged with the second clearance hole (301). The damage prevention ring (302) is used for the drill chuck (501) of the radial drilling machine to abut against it.

3. The precision positioning device for a radial drilling machine as described in claim 2, characterized in that: The top of the second positioning plate (3) is provided with a damage prevention groove (305), the damage prevention groove (305) and the second clearance hole (301) are arranged coaxially, the side wall of the damage prevention groove (305) is provided with a limiting groove (304), the side wall of the damage prevention ring (302) is provided with a limiting ring (303), a portion of the damage prevention ring (302) is inserted into the damage prevention groove (305), and the limiting ring (303) is inserted into the limiting groove (304).

4. The precision positioning device for a radial drilling machine as described in claim 1, characterized in that: The bottom of the support leg (2) is provided with a permanent magnet (201), which is used to attract and fix it to the worktable of the radial drilling machine.

5. The precision positioning device for a radial drilling machine as described in claim 4, characterized in that: The support leg (2) includes a telescopic rod (202) and a telescopic cylinder (203). The top end of the telescopic rod (202) is fixed to the bottom of the first positioning plate (1), and the bottom end of the telescopic cylinder (203) is rotatably mounted on the permanent magnet (201). A portion of the telescopic rod (202) is screwed into the telescopic cylinder (203).

6. The precision positioning device for a radial drilling machine as described in claim 5, characterized in that: The permanent magnet (201) has a telescopic hole (204) at its top, and a fixing groove (205) is provided on the side wall of the telescopic hole (204). The telescopic cylinder (203) has a telescopic column (206) at its bottom end, and a fixing ring (207) is provided on the side wall of the telescopic column (206). Part of the telescopic column (206) is inserted into the telescopic hole (204), and the fixing ring (207) is inserted into the fixing groove (205).

7. The precision positioning device for a radial drilling machine as described in claim 1, characterized in that: Multiple return springs (102) are provided between the first positioning plate (1) and the second positioning plate (3). When the elastic force of the return spring (102) on the second positioning plate (3) is equal to the frictional force between the second positioning plate (3) and the guide rod (4), the first positioning plate (1) and the second positioning plate (3) are arranged at intervals.

8. The precision positioning device for a radial drilling machine as described in claim 7, characterized in that: The first positioning plate (1) is provided with multiple through holes, and the bottom of the first positioning plate (1) is provided with multiple receiving cylinders (103). The receiving cylinders (103) correspond one-to-one with the through holes. The through holes and the corresponding receiving cylinders (103) are arranged coaxially. The bottom end of the return spring (102) is fixed inside the receiving cylinder (103), and the return spring (102) can be completely stored inside the receiving cylinder (103) due to pressure.

9. The precision positioning device for a radial drilling machine as described in claim 1, characterized in that: The first positioning plate (1) has a first mounting plate (104) on both sides. The top of the first mounting plate (104) is provided with a guide rod (4). The guide rod (4) includes a rigid rod and a rubber structure on the surface of the rigid rod. The second positioning plate (3) has a second mounting plate (306) on both sides. The second mounting plate (306) has an insertion hole. The guide rod (4) is inserted into the insertion hole, and the guide rod (4) is interference-fitted with the insertion hole.

10. The precision positioning device for a radial drilling machine as described in claim 9, characterized in that: The top of the guide rod (4) is provided with an anti-detachment post (307), the diameter of which is larger than the diameter of the insertion hole.

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