A method of making a lock nut and the product

Abstract

A method and product for making a lock nut is to install a male nut made without a male end toward a workpiece on a bolt, the thread minor diameter of the male end of the male nut is slightly smaller than the thread minor diameter of the bolt, preventing the male nut from advancing, the driving force of rotation causes the male nut to expand and bloom, the profile thread major diameter expands to the tap major diameter, the profile thread minor diameter expands to the bolt minor diameter, the radial rebound force of the profile thread minor diameter compression bolt lock, and then install a female nut with a female end toward the male nut, the bloom of the male nut prevents the female nut from advancing, the driving force of rotation causes the female nut to compress the bloom of the male nut, the radial rebound force of the bloom of the male nut and the compression force of the female nut compress the bolt lock.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of nut anti-loosening. BACKGROUND

[0002] Common mechanical anti-loosening methods include double-nut, double-washer anti-loosening, non-metal locking anti-loosening nut, slot locking nut, thread type anti-loosening nut, full-metal locking anti-loosening nut, concave-convex locking nut. The full-metal locking anti-loosening nut uses a large-tonnage press to compress the thread in multiple points to prevent loosening. However, it is difficult to be widely used due to the influence of large-tonnage pressure devices and pressure control. Therefore, a method for manufacturing anti-loosening nuts with low technical content and easy manufacturing is introduced. SUMMARY

[0003] The locking principle of the full-metal locking anti-loosening nut is that the thread of the nut is deformed by 2-3 teeth through die stamping. After deformation, the inner diameter of the nut thread is slightly smaller than the outer diameter of the bolt thread. It is well known that the friction between the threads after tightening can be much greater than that of ordinary threads, which can effectively prevent loosening. To obtain the deformation of the nut thread by 2-3 teeth, the inner diameter of the nut thread after deformation is slightly smaller than the outer diameter of the bolt thread. In fact, the nut thread with an inner diameter slightly smaller than the outer diameter of the bolt thread can be obtained without using a press. The above result can also be obtained by using a tap.

[0004] A method for manufacturing anti-loosening nuts that make the thread teeth deformed and the inner diameter of the nut thread after deformation slightly smaller than the outer diameter of the bolt thread. The method requires a nut blank and a tap. The nut blank is a cold heading and hot forging nut without threads and holes. The tap is a tap with a small or medium cutting angle.

[0005] The method for manufacturing anti-loosening nuts with deformed threads and an inner diameter of the nut thread after deformation slightly smaller than the outer diameter of the bolt thread is as follows: (1) fix the nut blank, (2) use the tap to thread, and withdraw when the tap cutting part is not fully threaded. The friction between the threads after tightening can be much greater than that of ordinary threads, which can effectively prevent loosening.

[0006] Or a method for manufacturing anti-loosening nuts with deformed threads and an inner diameter of the nut thread after deformation slightly smaller than the outer diameter of the bolt thread. The method requires a nut blank, a head tap, and a two-tap. The nut blank is a cold heading and hot forging nut without threads and holes. The head tap is a tap with the same pitch and a smaller diameter than the standard bolt diameter. The two-tap is a tap with the same pitch and a large standard cutting angle.

[0007] The method for manufacturing the lock nut with the deformed thread, whose inner diameter is slightly smaller than the outer diameter of the bolt thread, comprises the following steps: (1) fixing the nut blank; (2) using the first taper tap to thread; the first taper tap is retracted when the cutting part is completely tapped to the head; (3) using the second taper tap to thread; the second taper tap is retracted when the cutting part is not completely tapped to the head; the friction between the threads is much larger than that of the common thread when the nut is tightened, and the lock nut can effectively prevent loosening.

[0008] The method for manufacturing the lock nut with the deformed thread, whose inner diameter is slightly smaller than the outer diameter of the bolt thread, comprises the following steps: (1) fixing the nut blank; (2) using the first taper tap to thread; the first taper tap is retracted when the cutting part is completely tapped to the head; (3) using the second taper tap to thread; the second taper tap is retracted when the cutting part is not completely tapped to the head; the friction between the threads is much larger than that of the common thread when the nut is tightened, and the lock nut can effectively prevent loosening.

[0009] The method for manufacturing the lock nut with the deformed thread, whose inner diameter is slightly smaller than the outer diameter of the bolt thread, comprises the following steps: (1) fixing the nut blank; (2) using the first taper tap to thread; the first taper tap is retracted when the cutting part is completely tapped to the head; (3) using the second taper tap to thread; the second taper tap is retracted when the cutting part is not completely tapped to the head; the friction between the threads is much larger than that of the common thread when the nut is tightened, and the lock nut can effectively prevent loosening.

[0010] The method for manufacturing the lock nut with the deformed thread, whose inner diameter is slightly smaller than the outer diameter of the bolt thread, comprises the following steps: (1) fixing the nut blank; (2) using the first taper tap to thread; the first taper tap is retracted when the cutting part is completely tapped to the head; (3) using the second taper tap to thread; the second taper tap is retracted when the cutting part is not completely tapped to the head; the friction between the threads is much larger than that of the common thread when the nut is tightened, and the lock nut can effectively prevent loosening.

[0011] And the concave and convex locking nut is commonly used, such as: manual tap wrench locking, telescopic rod locking, etc. The locking pressure of the concave nut is used to make the material elasticity larger or the convex nut longer or the material rigidity weaker, and the radial contraction pressure of the bolt is prevented from loosening. The mechanical nut is affected by the length, rigidity and tolerance, and the rebound of the convex nut reduces the radial contraction pressure of the bolt to prevent loosening, and even the weakness of the failure. The expansion bolt is a classic example of preventing loosening. Only the expansion is outward expansion, and the bolt needs to be compressed inward, which cannot be used in mechanical locking nut. The present application uses full metal locking nut thread to cut radially or the thread described in the present application to cut radially and combine with concave and convex locking nut, so that the expansion is outward expansion, and the rebound force of the expansion is inward to prevent the bolt from loosening, solving the weakness of concave and convex locking nut and full metal locking nut.

[0012] A method for making a concave and convex nut combination locking nut, which generates deformation in the thread, and the inner diameter of the nut thread after deformation is slightly smaller than the outer diameter of the bolt thread, requires a concave nut, a convex nut blank, a cutting machine, a tap and / or a press,

[0013] The concave nut is a conical concave nut formed by turning or cold heading or hot forging on one side of the standard threaded nut. The conical concave nut is divided into concentric conical concave nut and eccentric conical concave nut. The concentric conical concave nut is matched with the eccentric convex nut, and the eccentric conical concave nut is matched with the concentric convex nut.

[0014] The convex nut blank is a conical convex nut formed by turning or cold heading or hot forging on one side of the cold heading hot forging without thread and hole. The conical convex nut is divided into concentric conical convex nut and eccentric conical convex nut (can be directly cold heading or hot forging to form a conical convex nut with multiple gaps, which saves the process of cutting machine cutting gap). The concentric conical convex nut is matched with the eccentric concave nut, and the eccentric convex conical nut is matched with the concentric concave nut.

[0015] The above-mentioned threading process causes deformation, and the inner diameter of the nut thread after deformation is slightly smaller than the outer diameter of the bolt thread. The method for tightening and locking the anti-loosening nut in the following order is: (1) Fix the convex nut blank. (2) Use a tap to tap from the end of the convex nut blank that does not have a convex end. After the tap cuts the part of the nut, retract it. Or use a first tap to tap. After the first tap cuts the part of the nut, retract it. Then use a second tap. After the second tap cuts the part of the nut, retract it. Or use a first tap. After the first tap cuts the part of the nut, retract it. Then use a second tap. After the second tap cuts the part of the nut, retract it. Immediately afterward, use a third tap. After the third tap cuts a part of the second tap, retract it. (3) Turn the convex nut blank over and use a cutting machine to make multiple radial cuts on the convex part of the convex nut. (4) Install the convex nut with the non-convex end facing the workpiece on the bolt. The inner diameter of the thread on the convex end of the convex nut is slightly smaller than the outer diameter of the bolt thread, preventing the convex nut from moving forward. Because the convex nut is radially cut into multiple segments, the driving force of rotation causes the convex nut to expand and split. The radial rebound force of the expansion compresses the bolt to prevent loosening, reducing the radial compression force. The convex nut can be restored and reused after disassembly. (5) Install the concave nut with the concave end facing the convex nut. The split convex end of the convex nut prevents the concave nut from moving forward. The driving force of rotation causes the concave nut to compress the split convex end of the convex nut. The radial rebound force of the convex nut's expansion and the concave nut's compression force compress the bolt to prevent loosening.

[0016] The above-mentioned method for making a convex-concave locking anti-loosening nut with deformed threads, where the inner diameter of the nut thread is slightly smaller than the outer diameter of the bolt thread, is as follows: (1) Fix the convex nut blank. (2) Use a tap to tap the non-convex end of the convex nut blank. After the tap cuts through the entire end to the calibration part, it retracts. (3) Use a press to punch one or more points on the convex nut, causing 2-3 threads of the nut thread to deform. After deformation, the inner diameter of the nut thread is slightly smaller than the outer diameter of the bolt thread. (4) Use a cutting machine to make multiple radial cuts on the convex nut, avoiding the punching points. (5) Install the convex nut with the non-convex end of the convex nut facing the workpiece on the bolt. The inner diameter of the thread at the convex end of the convex nut is slightly smaller than the outer diameter of the bolt thread, preventing the convex nut from moving forward. Because the convex nut is radially cut into multiple segments, the driving force of rotation causes the convex nut to expand and split. The radial rebound force of the expansion compresses the bolt to prevent loosening, reducing the radial compression force. The convex nut can be restored and reused after disassembly. (6) Install the concave nut with the concave end facing the convex nut. The convex nut’s convex ... Attached image description:

[0017] Appendix Figure 1 Attached diagram: Side view of convex nut and tap for tapping.

[0018] Appendix Figure 2 Attached diagram: Side view of the convex nut and the press applying pressure.

[0019] Appendix Figure 3 Side view of the assembly of the convex nut and concave nut.

[0020] Explanation of icon numbers:

[0021] 1. Convex nut; 2. Major diameter of double taper; 3. Minor diameter of double taper and minor diameter of bolt; 4. Minor diameter of head taper; 5. Major diameter of head taper; 6. Major diameter of standard thread; 7. Minor diameter of standard thread; 8. Major diameter of special thread; 9. Minor diameter of special thread; 10. Opening gap; 11. Major diameter of standard tap; 12. Minor diameter of standard tap and minor diameter of bolt; 13. Minor diameter of thread after press; 14. Major diameter of thread after press; 15. Concave nut; 16. Flowering convex nut; 17. Bolt; 18. Detailed implementation method:

[0022] Example 1

[0023] like Figure 1 First, fix the nut blank, then use a tap to tap from the non-convex end of the convex nut blank. After the tap does not fully tap out, retract it. Alternatively, use a first tap to tap, and after the first tap fully taps out to the calibration part, retract it. Then use a second tap, and after the second tap fully taps out to the calibration part, retract it. Alternatively, use a first tap, and after the first tap fully taps out to the calibration part, retract it. Then use a second tap, and after the second tap not fully taps out, retract it. Immediately afterward, use a third tap, and after the third tap turns the second tap part, retract it. Then flip the convex nut blank over and use a cutting machine to make multiple radial cuts on the convex part of the convex nut.

[0024] like Figure 1 Figure 3 Install the convex nut 1 with the non-convex end of the convex nut facing the workpiece on the bolt 18. The minor diameter of the thread at the convex end of the convex nut is slightly smaller than the minor diameter 4 of the bolt, preventing the convex nut 1 from moving forward. The driving force of rotation causes the convex nut 2 to expand and open to the open protrusion 17. The major diameter 9 of the irregular thread expands to the major diameter 3 of the two tapered thread, and the minor diameter 10 of the irregular thread expands to the minor diameter 4 of the bolt. The radial rebound force of the expanded minor diameter 10 of the irregular thread presses the bolt 18 to prevent loosening. Then install the concave nut 16 with the concave end facing the convex nut 2. The open protrusion 17 of the convex nut prevents the concave nut 16 from moving forward. The driving force of rotation causes the concave nut 16 to press against the open protrusion 17 of the convex nut. The radial rebound force of the expanded open protrusion 17 of the convex nut 2 and the concave pressing force of the concave nut 16 press the bolt 18 to prevent loosening.

[0025] Example 2

[0026] like Figure 2First, fix the convex nut blank, then use a tap to tap the end of the convex nut blank that does not have a convex part. After the tap cuts through the entire head and reaches the calibration part, it retracts. The press presses one or more points on the convex part of the convex nut, so that some of the threads of the nut are deformed. After deformation, the inner diameter of the nut thread is slightly smaller than the outer diameter of the bolt thread. Then, use a cutting machine to make multiple radial cuts on the convex part of the convex nut, avoiding the punching points.

[0027] like Figure 2 Figure 3 Install the convex nut 1 onto the bolt 18 with the non-convex end of the convex nut facing it. The minor diameter of the thread at the convex end of the convex nut is slightly smaller than the minor diameter 13 of the standard bolt, preventing the convex nut 1 from moving forward. The driving force of rotation causes the convex nut 2 to expand and open to the open protrusion 17. After pressing, the major diameter 15 of the thread expands to the major diameter 12 of the standard tap. After pressing, the minor diameter 14 of the thread expands to the minor diameter 13 of the standard bolt. The radial rebound force of the expanded minor diameter 14 of the thread after pressing compresses the bolt 18 to prevent loosening. Then install the concave nut 16 with the concave end facing the convex nut 1. The open protrusion 17 of the convex nut 1 prevents the concave nut 16 from moving forward. The driving force of rotation causes the concave nut 16 to press against the open protrusion 17 of the convex nut 1. The radial rebound force of the convex nut 2 expanding and opening protrusion 17 and the concave compressive force of the concave nut 16 compress the bolt to prevent loosening.

Claims

1. A method for manufacturing anti-loosening nuts, characterized in that, To make a lock nut with an inner diameter slightly smaller than the outer diameter of the bolt thread, you will need a nut blank and a tap. The nut blank is a cold-forged or hot-forged, unthreaded nut with a hole. The tap is a standard tap with a small or medium cutting cone angle. Step 1: Fix the nut blank. The second step is to tap from one end, stopping before the tap has fully cut through the thread. The tap is then retracted so that the friction between the threads is greater than that of a normal thread after the nut is tightened.

2. A method for manufacturing anti-loosening nuts, characterized in that, To manufacture a lock nut with an inner diameter slightly smaller than the outer diameter of the bolt thread, a nut blank, a head taper, and a second taper are required. The nut blank is a cold-forged or hot-forged, unthreaded nut with a hole. The head tap is a tap with the same pitch whose minor diameter is smaller than the minor diameter of the standard bolt thread. The two taps are standard taps with the same pitch but a larger cutting taper angle. Step 1: Fix the nut blank. The second step involves tapping from one end with a tapping head. The tapping stops when the entire cutting portion of the tapping head has exited the cutting head and reached the calibration section. The tap is then retracted. The third step involves tapping the same end with two taps. The tap is stopped before the cutting part of the two taps has completely emerged, and the tap is retracted so that the friction between the threads is greater than that of ordinary threads after the nut is tightened.

3. A method for manufacturing anti-loosening nuts, characterized in that, To manufacture a lock nut with an inner diameter slightly smaller than the outer diameter of the bolt thread, a nut blank, a head taper, a second taper, and a third taper are required. The nut blank is a cold-forged or hot-forged, unthreaded nut with a hole. The head tap is a tap with the same pitch whose minor diameter is smaller than the minor diameter of the standard bolt thread. The two taps are standard taps with the same pitch but a smaller cutting tap angle. The three taps mentioned are standard taps with the same pitch but a large cutting cone angle. Step 1: Fix the nut blank. The second step involves tapping from one end with a tapping head. The tapping stops when the entire cutting portion of the tapping head has exited the cutting head and reached the calibration section. The tap is then retracted. Step 3: Tap with two taps from the same end. Stop tapping before the entire cutting portion of the two taps has emerged, and retract the tap. Step 4: Tap from the same end with three taps. After the cutting part of the three taps cuts a portion of the thread tapped by the two taps, stop and retract the tap so that the friction between the threads is greater than that of ordinary threads after the nut is tightened.

4. A method for manufacturing anti-loosening nuts, characterized in that, To create a combination of concave and convex nuts where the inner diameter of the nut's threaded portion is slightly smaller than the outer diameter of the bolt's thread, you will need a concave nut, a convex nut, a cutting machine, and a tap. The concave nut is a tapered concave nut formed by turning, cold forging, or hot forging one end of a standard threaded nut. The convex nut is a cold-forged or hot-forged, unthreaded, perforated, tapered convex nut blank formed by turning, cold-forging, or hot-forging at one end. The tap is a standard tap with a small or medium cutting cone angle. Step 1: Fix the convex nut blank. The second step involves tapping the non-convex end of the convex nut blank with a tap. The tap is stopped before the entire cutting portion of the tap protrudes, and then retracted. This ensures that the friction between the threads is greater than that of a standard thread after the nut is tightened. Third step: Flip the convex nut over and use a cutting machine to make multiple radial cuts on the convex side of the nut. Step 4: Install the convex nut with the non-convex end facing the workpiece on the bolt. The inner diameter of the thread on the convex end of the convex nut is slightly smaller than the outer diameter of the bolt thread to prevent the convex nut from moving forward. The driving force of rotation causes the convex nut to expand and split open. The radial rebound force of the expansion compresses the bolt to prevent loosening. Step 5: Install the concave nut with the concave end facing the convex nut. The convex nut's convex ...

5. A method for manufacturing anti-loosening nuts, characterized in that, The method for fabricating a convex-concave nut assembly with an inner diameter slightly smaller than the outer diameter of the bolt thread requires a convex nut blank, a head taper, a second taper, and a cutting machine. The convex nut blank is a cold-forged or hot-forged unthreaded convex nut with a hole. The head tap is a tap with the same pitch whose minor diameter is smaller than the minor diameter of the standard bolt thread. The two taps are standard taps with the same pitch but a larger cutting taper angle. Step 1: Fix the convex nut blank. The second step involves tapping the non-convex end of the convex nut blank with a tapping head. The tapping head stops when it has completely tapped beyond the calibration section, and then retracts. Third step: Use a two-taper tap to tap the non-convex end of the convex nut blank. Stop tapping before the entire cutting part of the two-taper tap is finished, and retract the tap. This ensures that the friction between the threads is greater than that of a normal thread after the nut is tightened. Step 4: Flip the convex nut over and use a cutting machine to make multiple radial cuts on the convex side of the nut.

6. A method for manufacturing anti-loosening nuts, characterized in that, The method for fabricating a convex-concave nut assembly with an inner diameter of the nut thread slightly smaller than the outer diameter of the bolt thread requires a convex nut blank, a first taper, a second taper, a third taper, and a cutting machine. The convex nut blank is a cold-forged or hot-forged unthreaded convex nut with a hole. The head tap is a tap with the same pitch whose minor diameter is smaller than the minor diameter of the standard bolt thread. The two taps are standard taps with the same pitch but a larger cutting taper angle. The three taps mentioned are standard taps with the same pitch but a large cutting cone angle. Step 1: Fix the convex nut blank. The second step is to use a tapping head to tap the non-convex end of the convex nut blank. Stop tapping when the entire cutting part of the tapping head has reached the calibration section, and then retract the tap. Step 3: Use a two-tapered tap to tap the non-convex end of the convex nut blank. Stop tapping before the entire cutting portion of the two taps has emerged, and then retract the two taps. Fourth step: Use a three-prong taper to tap the non-convex end of the nut blank. Stop tapping a portion of the thread tapped by the two-prong taper with the three-prong taper, then retract the three-prong taper to ensure that the friction between the threads is greater than that of a standard thread after the nut is tightened. Step 5: Flip the convex nut over and use a cutting machine to make multiple radial cuts on the convex side of the nut.

7. A method for manufacturing an anti-loosening nut as described in any one of claims 4, 5, and 6, characterized in that, Used to manufacture convex and concave nut combination products that fit together with a symmetrical concave nut.

8. A method for manufacturing an anti-loosening nut as described in any one of claims 4, 5, and 6, characterized in that, Used to manufacture convex-conical nut combination products that fit together with a symmetrical concave nut.

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