Auxiliary positioning device for machining mounting holes of rectangular waveguide flanges

Abstract

The present invention discloses an auxiliary positioning device for machining installation holes of a rectangular waveguide flange, which includes a cavity, a push rod, a positioning slider, a spring, a knob, a neodymium magnet block, and a drill plate. After assembly, rotating the knob can make the positioning slider uniformly expand and contract in the cavity. When it contacts the waveguide inner cavity simultaneously, it ensures that the center of the waveguide inner cavity coincides with the center of the drill plate, realizing the machining positioning of the flange installation holes. When the knob is rotated in the reverse direction, the positioning slider contracts under the action of the spring and the neodymium magnet block, quickly completing the separation of the workpiece and the positioning device, and improving the machining efficiency. The present invention is small in size, simple to operate, accurate in positioning, good in applicability, and reusable.

Description

Technical Field

[0001] The present invention belongs to the field of precision machining technology. Background Art

[0002] Rectangular waveguides are interconnected with each other through flange plates. During the connection process, it is necessary to rely on the mounting holes on the waveguide flange plates for installation and positioning. Therefore, during the machining process of the mounting holes, the precision needs to be strictly controlled, including: the symmetry of the mounting holes relative to the inner cavity center line, and the dimensional tolerance of the positioning holes from the center line.

[0003] To meet the above precision requirements, currently mainly numerical control machining technology or traditional fitter measurement and scribing machining methods are adopted. The specific process of numerical control machining is roughly as follows: 1. Clamp and align the workpiece in the CNC machining center; 2. Sample the rectangular inner cavity of the waveguide; 3. Establish a coordinate system based on the sampled points in the inner cavity as the machining reference; 4. Complete the numerical control programming; 5. Replace the probe with a machining tool to complete the machining of the mounting holes. This method has a high machining precision, but the process cannot be simplified. In the face of mass production, each workpiece needs to repeat the above process, which is time-consuming and laborious, and the machining cost is high. The fitter measurement and scribing machining method mainly uses corresponding measuring tools to measure the rectangular inner cavity, find the center and calculate, then scribe the machining positions of the flange mounting holes, and then complete the machining. It does not rely on CNC, but depends on personal skills, with large operation differences and poor machining consistency. During mass production, it is also time-consuming and laborious, and the machining cost is relatively high. Summary of the Invention

[0004] To solve the above problems, the present invention proposes an auxiliary positioning device for machining the mounting holes of a rectangular waveguide flange.

[0005] The auxiliary positioning device for machining the mounting holes of a rectangular waveguide flange proposed by the present invention includes a cavity 1, a push rod 2, a positioning slider 3, a spring 4, a knob 5, a neodymium magnet block 6, and a drill plate 7, wherein:

[0006] The cavity 1 is a cuboid structure, including 1 boss and 3 positioning holes;

[0007] The positioning slider 3 is a cylindrical structure, including 1 spherical surface. During assembly, 2 positioning sliders 3 pass through the positioning holes of the cavity 1, forming a shaft-hole fit with the positioning holes of the cavity 1 and allowing relative sliding;

[0008] The push rod 2 is a cylindrical structure, including one stepped circle, one conical table surface, and one flat-bottom blind hole. During assembly, the stepped circle of the push rod 2 is sleeved with a spring 4 and inserted into the positioning hole of the cavity 1 to form a shaft-hole fit, allowing relative sliding. The neodymium magnet block 6 is embedded in the flat-bottom blind hole of the push rod 2. Under the action of magnetic force, the spherical surface of the positioning slider 3 is in close contact with the conical table surface of the push rod 2, forming a positioning mechanism. Pushing the push rod 2 can make the positioning slider 3 extend evenly. When it contacts the waveguide inner cavity, the machining positioning is completed. Stopping pushing the push rod 2 will drive the positioning slider 3 to achieve automatic rebound;

[0009] The drill plate 7 is a cuboid structure, including one concave platform and one threaded hole. The concave platform of the drill plate 7 and the convex platform of the cavity 1 form an interference fit to ensure consistency with the center of the positioning mechanism. The drilling holes on the drill plate 7 are used to guide the drill bit to complete the machining of the installation holes. The knob 5 is threadedly connected to the drill plate 7 and is used to push the push rod 2.

[0010] Furthermore, threaded connections are provided on the drill plate 7 and the cavity 1 to achieve the replaceability of the drill plate 7 for the machining positioning of different waveguide flanges.

[0011] Furthermore, extraction threaded holes are provided on the drill plate 7 to achieve the rapid separation of the drill plate 7 from the cavity 1.

[0012] Furthermore, the conical table surface of the push rod 2 and the spherical surface of the positioning slider 3 are arranged oppositely.

[0013] Compared with the prior art, the significant advantages of the present invention are as follows: (1) The present invention simplifies the positioning process, can achieve rapid and accurate positioning, and effectively guarantees the machining consistency; (2) The present invention is suitable for batch processing and significantly reduces costs; (3) The present invention has a small external dimension, light weight, low manufacturing cost, and is convenient to use and operate; (4) The present invention can complete the machining of installation holes with different size requirements by replacing the drill plate; (5) The present invention is convenient to disassemble and can be used repeatedly. Description of the Drawings

[0014] Figure 1 It is a three-dimensional structure schematic diagram of the device of the present invention.

[0015] Figure 2 It is a structure schematic diagram of the device of the present invention.

[0016] Figure 3 It is a structure schematic diagram of the device of the present invention.

[0017] Figure 4 It is a structure schematic diagram of the device of the present invention.

[0018] Figure 5 It is a schematic diagram of the process of step 1 in the present invention.

[0019] Figure 6Schematic diagram of the process of Step 1 in the present invention.

[0020] Figure 7 Schematic diagram of the process of Step 2 in the present invention.

[0021] Wherein: 1 - cavity, 2 - push rod, 3 - positioning slider, 4 - spring, 5 - knob, 6 - neodymium magnet block, 7 - drill plate, 8 - flange, 9 - waveguide, 10 - the present invention, 11 - mounting hole. Specific embodiments

[0022] In order to make the technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] As Figures 1-4 shown, the preferred embodiments of the present invention preferably include: cavity 1, push rod 2, positioning slider 3, spring 4, knob 5, neodymium magnet block 6, drill plate 7, wherein:

[0024] The cavity 1 is a cuboid structure, including 1 boss and 3 positioning holes; the positioning slider 3 is a cylindrical structure, including 1 spherical surface. During assembly, 2 positioning sliders 3 pass through the positioning holes of the cavity 1 to form a shaft-hole fit with the positioning holes of the cavity 1 and can slide relative to each other; the push rod 2 is a cylindrical structure, including 1 stepped circle, 1 conical table surface, and 1 flat-bottom blind hole. During assembly, the stepped circle of the push rod 2 is sleeved with the spring 4 and inserted into the positioning hole of the cavity 1 to form a shaft-hole fit and can slide relative to each other. The neodymium magnet block 6 is embedded in the flat-bottom blind hole of the push rod 2. Under the action of magnetic force, the spherical surface of the positioning slider 3 is in close contact with the conical table surface of the push rod 2 to form a positioning mechanism. Pushing the push rod 2 can make the positioning slider 3 extend evenly. When it contacts the waveguide inner cavity, the processing positioning is completed. Stopping pushing the push rod 2 will drive the positioning slider 3 to achieve rapid recovery; the drill plate 7 is a cuboid structure, including 1 concave platform and 1 threaded hole. The concave platform of the drill plate 7 forms an interference fit with the boss of the cavity 1 to ensure consistency with the center of the positioning mechanism. The drill holes on the drill plate 7 are used to guide the drill bit to complete the processing of the mounting hole. The knob 5 is threadedly connected to the drill plate 7 and is used to push the push rod 2

[0025] Figures 5-7 A detailed description of the usage process of the present invention is as follows, including the following steps:

[0026] Step 1: Sleeve the inner cavity of the rectangular waveguide on the positioning mechanism of the positioning device. The flange plane of the waveguide is in contact with the plane of the drill plate. At this time, the positioning mechanism is in a contracted state and will not interfere with the waveguide inner cavity (the narrow surface of the cavity 1 is in contact with the narrow surface of the waveguide inner cavity to ensure that the normal center of the narrow surface is aligned);

[0027] Step 2: Rotate the knob 5 to make the two positioning sliders 3 slide out evenly along the positioning holes on both sides of the cavity 1 until the end faces of the positioning sliders 3 contact the inner wall of the rectangular waveguide cavity, completing the machining positioning of the mounting holes of the rectangular waveguide flange; (The length dimensions of the two positioning sliders 3 are the same to ensure that the center of the waveguide cavity is aligned with the center of the drill plate 7).

[0028] Step 3: Clamp the waveguide flange and the positioning device by applying an external force to ensure that the positioning device and the waveguide flange are relatively fixed and there will be no loosening displacement during the machining process.

[0029] Step 4: The drill bit performs cutting feed along the guide holes on the drill plate 7 to complete the machining of the flange mounting holes.

[0030] Step 5: After cleaning up the chips and cutting fluid, rotate the knob 5 in the reverse direction, and the positioning slider 3 will automatically retract into the cavity 1.

[0031] Step 6: Release the clamping external force and separate the positioning device. At this time, the machining of the mounting holes of the rectangular waveguide flange is completed, and the machined holes meet the requirements of symmetry and dimensional accuracy.

[0032] Rotate the knob 5 in the reverse direction until the knob 5 is completely removed. Loosen the threaded connection between the drill plate 7 and the cavity 1. Using the extraction screw, the drill plate 7 and the cavity 1 can be quickly separated. By replacing the different drill plates 7, the machining of the mounting holes of the waveguide flange with different hole pitches and different hole diameters can be completed. In addition, when the drill plate 7 is severely worn after multiple uses, the drill plate 7 can be changed in the same way to ensure the continuous use of the positioning device.

[0033] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

Claims

1. An auxiliary positioning device for machining the mounting holes of a rectangular waveguide flange, characterized in that: It includes a cavity (1), a push rod (2), a positioning slider (3), a spring (4), a knob (5), a neodymium magnet block (6), and a drill plate (7), where: The cavity (1) is a cuboid structure, including 1 boss and 3 positioning holes; The positioning slider (3) is a cylindrical structure, including 1 spherical surface. During assembly, 2 positioning sliders (3) pass through the positioning holes of the cavity (1) to form a shaft-hole fit with the positioning holes of the cavity (1) and can slide relative to each other; The push rod (2) is a cylindrical structure, including 1 stepped circle, 1 conical table surface, and 1 flat-bottom blind hole. During assembly, the stepped circle of the push rod (2) is sleeved with the spring (4) and inserted into the positioning hole of the cavity (1) to form a shaft-hole fit and can slide relative to each other. The neodymium magnet block (6) is embedded in the flat-bottom blind hole of the push rod (2). Under the action of magnetic force, the spherical surface of the positioning slider (3) is in close contact with the conical table surface of the push rod (2) to form a positioning mechanism. Pushing the push rod (2) can make the positioning slider (3) extend evenly. When it contacts the waveguide inner cavity, the machining positioning is completed. Stopping pushing the push rod (2) will drive the positioning slider (3) to achieve rapid recovery; The drill plate (7) is a cuboid structure, including 1 concave platform and 1 threaded hole. The concave platform of the drill plate (7) forms an interference fit with the boss of the cavity (1) to ensure consistency with the center of the positioning mechanism. The drill holes on the drill plate (7) are used to guide the drill bit to complete the machining of the mounting holes. The knob (5) is threadedly connected to the drill plate (7) and is used to push the push rod (2).

2. The auxiliary positioning device for machining the mounting holes of the rectangular waveguide flange according to claim 1, wherein: Threaded connections are provided on the drill plate (7) and the cavity (1) to achieve the replaceability of the drill plate (7) for the machining positioning of different waveguide flanges.

3. The auxiliary positioning device for machining the mounting holes of the rectangular waveguide flange according to claim 1 or 2, characterized in that: Pull-out threaded holes are provided on the drill plate (7) to achieve the rapid separation of the drill plate (7) from the cavity (1).

4. The auxiliary positioning device for machining the mounting holes of the rectangular waveguide flange according to claim 3, wherein: The conical table surface of the push rod (2) is arranged opposite to the spherical surface of the positioning slider (3).

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