Nut internal thread rolling tool

Abstract

The utility model discloses a nut internal thread rolling tool which comprises a supporting frame, a first supporting seat, a second supporting seat, a rotating shaft and a rolling wheel. Wherein a linear guide rail is arranged on the support frame; the first supporting seat is detachably connected with the supporting frame; the second supporting seat is in sliding connection with the linear guide rail and can be locked on the linear guide rail; the two ends of the rotating shaft are rotatably connected with the first supporting seat and the second supporting seat respectively; a threaded forming bulge is arranged on the rotating shaft; the rolling wheel and the rotating shaft are adjacently arranged and connected with an external machine tool spindle, and the machine tool can drive the rolling wheel to rotate and feed. According to the utility model, the thread strength and hardness are improved; the surface smoothness and precision are improved; materials are saved, the production cost is reduced, and the waste treatment cost is reduced; the service life of the product is prolonged, and the reliability is improved.

Description

Technical Field

[0001] This utility model relates to the field of nut internal thread forming technology, and in particular to a tooling for rolling internal threads of nuts. Background Technology

[0002] Currently, the processing method for internal threads of nuts is to use an internal thread grinding machine to grind the inner wall of the nut. This processing method has high equipment requirements, limited processing size, high difficulty in deep hole processing, high precision requirements, low production efficiency, high cost, and high technical requirements for personnel. Summary of the Invention

[0003] According to an embodiment of the present invention, a tooling for rolling internal threads of a nut is provided, comprising:

[0004] Support frame, on which linear guide rails are installed;

[0005] The first support base is detachably connected to the support frame;

[0006] The second support is slidably connected to the linear guide rail and can be locked onto the linear guide rail;

[0007] A rotating shaft, with its two ends rotatably connected to a first support base and a second support base, respectively; the rotating shaft is provided with threaded protrusions.

[0008] The rolling mill and the rotating shaft are arranged adjacent to each other and connected to the spindle of an external machine tool. The machine tool can drive the rolling mill to perform rotation and feed movements.

[0009] Furthermore, the two ends of the rotating shaft are connected to the first support seat and the second support seat through needle roller bearings.

[0010] Furthermore, it also includes: a pair of first cover plates, which are disposed at both ends of the first support and sleeved on the rotating shaft for sealing the first support.

[0011] Furthermore, it also includes: a pair of thrust ball bearings, which are disposed at both ends of the second support and sleeved on the rotating shaft.

[0012] Furthermore, it also includes a rubber sleeve, which can be fitted onto the rotating shaft.

[0013] Furthermore, it also includes: a slider, the second support base being slidably connected to the linear guide rail via the slider, and the slider being locked onto the linear guide rail by screws.

[0014] Furthermore, the rotating shaft and the threaded protrusions are made of bearing steel.

[0015] The beneficial effects of the nut internal thread rolling tool according to the embodiments of this utility model are as follows:

[0016] 1. Improved thread strength and hardness: The rolling process causes the internal grains of the material to slip and twist during cold forging, forming a continuous streamlined structure, thereby significantly improving the strength and hardness of the thread. Compared to the internal threads of nuts machined by ordinary internal thread grinding machines, the tensile strength, shear strength, and hardness are all significantly improved.

[0017] 2. Improved surface finish and precision: Roller rolling can achieve higher surface finish and thread precision. Due to the high compressive force during the roller rolling process, the thread surface is smoother and flatter after rolling, eliminating the need for secondary polishing and maintaining high precision in long-term production.

[0018] 3. Material savings and reduced production costs: Roll forming is a chip-free processing method that removes almost no material, thus saving a significant amount of raw materials. Furthermore, since no chips are generated during the process, waste disposal costs are reduced.

[0019] 4. Extends product lifespan and improves reliability: Compared with traditional ground internal threads, rolled threads have higher fatigue resistance and corrosion resistance due to their high strength and good surface quality, thus extending the product lifespan and improving reliability.

[0020] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure according to an embodiment of the present utility model;

[0022] Figure 2 for Figure 1 Top view;

[0023] Figure 3 for Figure 2 Sectional view along axis AA;

[0024] Figure 4 This is a schematic diagram of the structure of the rotating shaft according to an embodiment of the present utility model. Detailed Implementation

[0025] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0026] First, combine Figures 1-4 The present invention describes a tooling for rolling internal threads of nuts according to an embodiment of the present invention, which is used for forming internal threads of nuts and has a wide range of applications.

[0027] like Figures 1-4As shown, the nut internal thread rolling tooling of this utility model embodiment includes:

[0028] Support frame 1, on which a linear guide rail 11 is provided;

[0029] First support base 2, first support base 2 is connected to support frame 1 by screws;

[0030] The second support 3 is slidably connected to the linear guide rail 11 and can be locked on the linear guide rail 11. The linear guide rail 11 is used to adjust the position between the second support 3 and the first support 2.

[0031] The rotating shaft 4 is rotatably connected to the first support 2 and the second support 3 at both ends, and the distance between the second support 3 and the first support 2 can be adjusted according to the different lengths of the rotating shaft 4; the rotating shaft 4 is provided with a threaded protrusion 41.

[0032] Rolling roller 5 and rotating shaft 4 are arranged adjacent to each other and connected to the external machine tool spindle. The machine tool can drive rolling roller 5 to perform rotation and feed motion.

[0033] The nut blank 6 is mounted on the rotating shaft 4. As the rolling roller 5 rotates along with the main spindle of the machine tool, it approaches and squeezes the nut blank 6. The nut blank 6 rotates and is gradually formed into a thread groove by being squeezed by the threaded protrusion 41 on the rotating shaft 4.

[0034] Furthermore, such as Figure 3 As shown, in this embodiment, the two ends of the rotating shaft 4 are connected to the first support seat 2 and the second support seat 3 through needle roller bearings 7. The needle roller bearings 7 are used to reduce the friction between the rotating shaft 4 and the first support seat 2 and the second support seat 3.

[0035] Furthermore, such as Figures 1-2 As shown, in this embodiment, it also includes: a pair of first cover plates 8, which are disposed at both ends of the first support 2 and sleeved on the rotating shaft 4 to seal the first support 2 and prevent the rolling oil on the rotating shaft 4 and the nut blank 6 from entering the first support 2.

[0036] Furthermore, such as Figures 1-2 As shown, in this embodiment, it also includes: a pair of thrust ball bearings 9, which are disposed at both ends of the second support 3 and sleeved on the rotating shaft 4 to bear axial load. If necessary, a pair of thrust ball bearings 9 can also be disposed at both ends of the first support 2.

[0037] Furthermore, in this embodiment, a rubber sleeve (not shown) is also included. The rubber sleeve can be sleeved on the rotating shaft 4 and is disposed between the nut blank 6 and the second support 3 and / or between the nut blank 6 and the first support 2, in order to prevent the nut blank 6 from axially moving during processing.

[0038] Furthermore, such as Figure 1 , 3 As shown, in this embodiment, it also includes: a slider 10, the second support base 3 is slidably connected to the linear guide rail 11 through the slider 10, and the slider 10 can be locked on the linear guide rail 11 by screws to fix the position of the second support base 3.

[0039] Furthermore, in this embodiment, the rotating shaft 4 and the threaded protrusion 41 are made of bearing steel, which has good resistance to deformation. Since the nut blank 6 is made of low carbon steel, the hardness of the rotating shaft 4 must be greater than that of the nut blank 6 in order to prevent deformation during the machining of the thread groove.

[0040] Working principle: Select the size of the rotating shaft 4 according to the requirements, and install one end of it on the first support seat 2. Then, put the nut blank 6 on the rotating shaft 4, and then put on the rubber sleeve. Adjust the position of the second support seat 3 on the linear guide rail 11, install the other end of the rotating shaft 4 on the second support seat 3, and lock the slider 10. Then, install the support frame 1 in the machine, edit the program on the machine tool, and align the points. Open the program, and the mill spindle will drive the rolling roller 5 to rotate counterclockwise. The spindle will continuously squeeze the nut blank 6 according to the edited program. The inner wall of the nut blank 6 will directly contact the external thread forming protrusion of the rotating shaft 4. After reaching a critical point, the rolling roller 5 will drive the nut blank 6 to rotate. During this process, the spindle will drive the rolling roller 5 to continuously feed until the internal thread size requirement of the nut blank 6 is met. At this point, the internal thread of the nut is completely squeezed out.

[0041] Above, refer to Figures 1-4 The present invention describes a tooling for rolling internal threads of nuts according to an embodiment of the present invention, which improves thread strength and hardness; improves surface finish and precision; saves materials, reduces production costs, reduces waste disposal costs; extends product service life, and improves reliability.

[0042] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes that element.

[0043] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A tooling for rolling internal threads of a nut, characterized in that, Include: A support frame, on which a linear guide rail is provided; A first support base, which is detachably connected to the support frame; The second support is slidably connected to the linear guide rail and can be locked onto the linear guide rail; A rotating shaft, the two ends of which are rotatably connected to the first support base and the second support base respectively; the rotating shaft is provided with threaded protrusions; The rolling mill and the rotating shaft are arranged adjacent to each other and connected to the spindle of an external machine tool. The machine tool can drive the rolling mill to perform rotation and feed movements.

2. The tooling for rolling internal threads of nuts as described in claim 1, characterized in that, The two ends of the rotating shaft are connected to the first support base and the second support base through needle roller bearings.

3. The tooling for rolling internal threads of nuts as described in claim 2, characterized in that, It also includes: a pair of first cover plates, which are disposed at both ends of the first support and sleeved on the rotating shaft for sealing the first support.

4. The tooling for rolling internal threads of nuts as described in claim 1, characterized in that, It also includes: a pair of thrust ball bearings, which are disposed at both ends of the second support and sleeved on the rotating shaft.

5. The tooling for rolling internal threads of nuts as described in claim 1, characterized in that, It also includes: a rubber sleeve, which can be fitted onto the rotating shaft.

6. The tooling for rolling internal threads of nuts as described in claim 1, characterized in that, It also includes: a slider, wherein the second support base is slidably connected to the linear guide rail via the slider, and the slider can be locked onto the linear guide rail by screws.

7. The tooling for rolling internal threads of nuts as described in claim 1, characterized in that, The rotating shaft and the threaded protrusion are made of bearing steel.

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