Hexagon nut inclined hole drilling method

Abstract

The invention discloses a hexagonal nut inclined hole drilling method which comprises the following steps: opening a drill jig, and placing a hexagonal nut with an inclined hole to be drilled in the drill jig; the drill jig is closed, and the lower ends of the two tension bolts are clamped on the fixing seats respectively and are locked through the tension nuts; one point where a drill bit contacts with the inclined surface of the hexagon nut is used as a drilling point; the direction of the drilling jig is rotated, so that the vertical drilling sleeve is located in the vertical direction; the drill bit drills a vertical inclined surface hole in the drilling point through the vertical drilling sleeve; the direction of the drill jig is rotated again, so that the inclined hole drill bushing is located in the vertical direction; a drill bit drills an anti-loosening hole in the inclined plane of the hexagon nut through the inclined hole drill sleeve, namely the vertical inclined plane hole. The reverse inclined hole is drilled in advance through the vertical drilling sleeve, and then the inclined surface anti-loosening hole is drilled through the inclined hole drilling sleeve, so that the influence of the inclined surface on the unbalance loading of the drill bit can be eliminated, the quality of the processed anti-loosening hole is improved, and the service life of the drill bit is prolonged.

Description

Technical Field

[0001] The invention relates to a method for drilling an oblique hole of a hexagonal nut. Background Art

[0002] In machining, it is very difficult to drill holes on the inclined surface of hexagonal nuts, such as Figure 1 As shown, this is because when the drill bit 1 contacts the inclined surface of the hexagonal nut 2, it will cut on one side and be subjected to a reverse force F from the inclined surface to the cutter head. The reverse force F is decomposed into two components, fx and fy. Among them, fx will cause the drill bit 1 to bend. The drill bit 1 will break if it is not operated properly or not properly controlled.

[0003] like Figure 2 As shown, if the drill jig 3 is used to guide the drill bit 1, the drill bit 1 will still cut unilaterally when it contacts the inclined surface and be subjected to the radial force fx of the inclined surface on the cutter head, and the radial force will be transferred to the inner hole wall of the drill sleeve 4. Although it offsets the reaction force fx' of the drill sleeve, it will increase the wear of the drill sleeve 4 and reduce the life of the drill jig 3. Therefore, the existing drilling process has a high cost for processing anti-loosening holes on the inclined surface of hexagonal nuts. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a method for drilling oblique holes in hexagonal nuts which is easy to operate and has high drilling efficiency.

[0005] The technical solution of the present invention to solve the above technical problems is: a method for drilling oblique holes in hexagonal nuts, which is implemented based on a drilling jig, wherein the drilling jig comprises an upper V-shaped block and a lower V-shaped block, which are arranged opposite to each other and hinged at one end to form a drilling jig in the shape of a letter C as a whole, and the hexagonal nut is placed in the drilling jig, and the upper V-shaped block and the lower V-shaped block are respectively positioned at two diagonal corners of the hexagonal nut; the ends of the upper V-shaped block and the lower V-shaped block away from the hinge point are both provided with a vertical drilling sleeve perpendicular to the inclined surface of the hexagonal nut and an oblique hole drilling sleeve for drilling oblique holes; a locking structure is provided on the side of the drilling jig, and the locking structure comprises a tightening bolt and a tightening nut, two mounting seats are symmetrically arranged on both sides of the upper V-shaped block, and the upper ends of the two tightening bolts are respectively hinged on the two mounting seats, and two fixing seats are symmetrically arranged on both sides of the lower V-shaped block, and the lower ends of the two tightening bolts are respectively clamped on the fixing seats and locked with tightening nuts; The drilling method includes the following steps: Step 1: Open the drilling jig and place the hexagonal nut for the inclined hole to be drilled in the drilling jig; Step 2: Close the drilling jig, clamp the lower ends of the two tension bolts on the fixing seats respectively and tighten them with tension nuts; Step 3: Use the point where the drill bit touches the inclined surface of the hexagonal nut as the drilling point; Step 4: Rotate the drilling jig so that the vertical drilling sleeve is in the vertical direction; Step 5: The drill bit passes through the vertical drilling sleeve to drill a vertical inclined hole at the drilling point; Step 6: Rotate the direction of the drill jig again so that the inclined hole drill sleeve is in the vertical direction; Step 7: Use the drill bit to drill a hole through the inclined surface of the hexagonal nut, that is, the vertical inclined hole to drill a hole to prevent loosening.

[0006] In the above-mentioned method for drilling an inclined hole in a hexagonal nut, in step five, the depth of the vertical inclined hole is equal to the diameter size of the drill bit.

[0007] In the above-mentioned method for drilling inclined holes in hexagonal nuts, in step seven, when the drill bit contacts the inclined surface of the vertical chamfered hole, a reverse force fx' of the inclined surface of the vertical chamfered hole will be generated. The reverse force fx' of the inclined surface of the vertical chamfered hole is equal in magnitude and opposite in direction to the radial force fx of the hexagonal nut on the tool. The eccentric loads cancel each other out, thereby avoiding the problem of breakage of the drill bit due to the eccentric load.

[0008] The beneficial effect of the present invention is that: a vertical drilling sleeve perpendicular to the inclined surface of the hexagonal nut and an inclined hole drilling sleeve for drilling inclined holes are provided on the ends of the upper V-block and the lower V-block away from the hinge point. A reverse inclined hole is pre-drilled by the vertical drilling sleeve, and then the inclined surface anti-loosening hole is drilled by the inclined hole drilling sleeve, so that the influence of the inclined surface on the drill bit eccentric load can be eliminated, thereby improving the quality of the anti-loosening hole processing and the life of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is the force analysis diagram when the drill bit drills an inclined surface.

[0010] Figure 2 This is a force analysis diagram when using a drill template to guide the drill bit to drill an inclined surface.

[0011] Figure 3 It is a schematic diagram of the structure of the present invention.

[0012] Figure 4 for Figure 3 Left view of .

[0013] Figure 5 This is a schematic diagram of the loose pressure state of the special drilling jig for inclined holes of hexagonal nuts.

[0014] Figure 6 It is a structural schematic diagram of the upper V-shaped block.

[0015] Figure 7 It is a schematic diagram of the structure of the lower V-block.

[0016] Figure 8 Flow chart of the drilling method of the present invention.

[0017] Fig. 9 It is a schematic diagram of the state of drilling a vertical hole according to the present invention.

[0018] Fig.10It is a schematic diagram of the state of drilling an inclined hole according to the present invention.

[0019] Fig.11 Schematic diagram of the force analysis for drilling vertical holes and inclined holes.

[0020] Fig.12 for Fig.11 Magnified view of area I in the middle. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] A method for drilling an oblique hole of a hexagonal nut is implemented based on a drilling template, such as Figure 3-Figure 7 As shown, the drilling jig includes an upper V-block 5 and a lower V-block 6, which are arranged opposite to each other and hinged together at one end by a movable pin 7 to form a drilling jig that is overall C-shaped. The hexagonal nut 2 is placed in the drilling jig, and the upper V-block 5 and the lower V-block 6 are respectively positioned at two diagonal corners of the hexagonal nut 2; the ends of the upper V-block 5 and the lower V-block 6 away from the hinge point are provided with a vertical drilling sleeve 8 perpendicular to the inclined surface of the hexagonal nut 2 and an inclined hole drilling sleeve 9 for drilling inclined holes; a locking structure is provided on the side of the drilling jig.

[0023] The locking structure includes a tensioning bolt 10 and a tensioning nut 11. Two mounting seats 12 are symmetrically arranged on both sides of the upper V-shaped block 5. The upper ends of the two tensioning bolts 10 are respectively hinged on the two mounting seats 12. Two fixing seats 13 are symmetrically arranged on both sides of the lower V-shaped block 6. The fixing seats 13 are provided with slots 14 for the tensioning bolts 10 to be inserted into. The lower ends of the two tensioning bolts 10 are respectively clamped in the slots 14 of the fixing seats 13 and locked with the tensioning nuts 11.

[0024] like Figure 8-Figure 12 As shown, the hexagonal nut oblique hole drilling method includes the following steps: Step 1: Open the drilling jig and place the hexagonal nut for the inclined hole to be drilled in the drilling jig.

[0025] Step 2: Close the drilling jig, clamp the lower ends of the two tensioning bolts on the fixing seats respectively and tighten them with tensioning nuts.

[0026] Step 3: Use the point where the drill bit touches the inclined surface of the hexagonal nut as the drilling point.

[0027] Step 4: Rotate the drilling template so that the vertical drilling sleeve is in the vertical direction.

[0028] Step 5: The drill bit passes through the vertical drilling sleeve to drill a vertical bevel hole at the drilling point. The depth of the vertical bevel hole is the diameter of the drill bit.

[0029] Step 6: Rotate the direction of the drill jig again so that the inclined hole drill sleeve is in the vertical direction.

[0030] Step 7: The drill bit is inserted into the inclined surface of the hexagonal nut, that is, the vertical inclined surface, to drill a loosening hole. When the drill bit contacts the vertical inclined surface, a reverse force fx' will be generated. The reverse force fx' of the vertical inclined surface is equal to the radial force fx of the hexagonal nut on the tool and is opposite in direction. The eccentric forces offset each other, thus avoiding the problem of the drill bit breaking due to the eccentric force.

Claims

1. A method for drilling an oblique hole of a hexagonal nut, characterized in that: It is realized based on a drilling jig, which comprises an upper V-shaped block and a lower V-shaped block, which are arranged opposite to each other and hinged at one end to form a C-shaped drilling jig as a whole, and a hexagonal nut is placed in the drilling jig, and the upper V-shaped block and the lower V-shaped block are respectively positioned at two diagonal angles of the hexagonal nut; the ends of the upper V-shaped block and the lower V-shaped block away from the hinge point are both provided with a vertical drilling sleeve perpendicular to the inclined surface of the hexagonal nut and an inclined hole drilling sleeve for drilling inclined holes; a locking structure is provided on the side of the drilling jig, and the locking structure comprises a tightening bolt and a tightening nut, and two mounting seats are symmetrically arranged on both sides of the upper V-shaped block, and the upper ends of the two tightening bolts are respectively hinged on the two mounting seats, and two fixing seats are symmetrically arranged on both sides of the lower V-shaped block, and the lower ends of the two tightening bolts are respectively clamped on the fixing seats and locked with tightening nuts; The drilling method includes the following steps: Step 1: Open the drilling jig and place the hexagonal nut for the inclined hole to be drilled in the drilling jig; Step 2: Close the drilling jig, clamp the lower ends of the two tension bolts on the fixing seats respectively and tighten them with tension nuts; Step 3: Use the point where the drill bit touches the inclined surface of the hexagonal nut as the drilling point; Step 4: Rotate the drilling jig so that the vertical drilling sleeve is in the vertical direction; Step 5: The drill bit passes through the vertical drilling sleeve to drill a vertical inclined hole at the drilling point; Step 6: Rotate the direction of the drill jig again so that the inclined hole drill sleeve is in the vertical direction; Step 7: Use the drill bit to drill a hole through the inclined surface of the hexagonal nut, that is, the vertical inclined hole to drill a hole to prevent loosening.

2. The method for drilling an oblique hole of a hexagonal nut according to claim 1, characterized in that: In step 5, the vertical bevel hole depth is equal to the drill bit diameter size.

3. The method for drilling an oblique hole of a hexagonal nut according to claim 1, characterized in that: In step seven, when the drill bit contacts the vertical chamfered hole bevel, a reverse force fx' of the vertical chamfered hole bevel is generated. The reverse force fx' of the vertical chamfered hole bevel is equal in magnitude and opposite in direction to the radial force fx of the hexagonal nut bevel on the tool. The eccentric loads cancel each other out, thus avoiding the drill bit from breaking due to the eccentric load.

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