A cold rolling device for external thread bottom

Abstract

This utility model relates to the field of mechanical equipment manufacturing technology and discloses a cold rolling device for external thread root. It includes a base fixed to a lathe slide box, with two support frames mounted on the base. The two support frames are symmetrically distributed around the thread rotation center. Each support frame is equipped with a hydraulic cylinder. A single-tooth rolling wheel and a double-tooth rolling wheel are respectively mounted on the ends of the telescopic rods of the two hydraulic cylinders. A hydraulic pump is fixed to the base. Each hydraulic cylinder is connected to a first outlet pipe and a second outlet pipe. The first outlet pipes are connected to the first outlet of the hydraulic pump via a first tee connector, and the second outlet pipes are connected to the second outlet of the hydraulic pump via a second tee connector. This utility model can realize cold rolling of thread root, ensuring uniform and consistent thread root deformation. During the rolling process, the rolling wheels are balanced under force, eliminating the force perpendicular to the lathe spindle and reducing wear on the lathe equipment.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment manufacturing technology, and in particular to a cold rolling device for the bottom of an external thread. Background Technology

[0002] Common external thread cold rolling devices utilize a pressure head mounted on a lathe tool post combined with rolling wheels to roll the thread root. Due to the high rolling pressure, this can easily cause irreversible damage to the lathe, affecting its lifespan. To address the problems existing in the prior art, this invention provides an external thread cold rolling device. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a cold rolling device for external thread bottom to solve the problems pointed out in the background art.

[0004] To achieve the aforementioned objectives of this utility model, the technical solution adopted is as follows: A cold rolling device for external threaded wire includes a base fixed to a lathe slide box. Two support frames are mounted on the base, symmetrically distributed around the thread rotation center. Each support frame is equipped with a hydraulic cylinder. A single-tooth rolling wheel and a double-tooth rolling wheel are respectively mounted on the ends of the telescopic rods of the two hydraulic cylinders. A hydraulic pump is fixed on the base. Each hydraulic cylinder is connected to a first outlet pipe and a second outlet pipe. The first outlet pipes are connected to the first outlet of the hydraulic pump through a first tee connector, and the second outlet pipes are connected to the second outlet of the hydraulic pump through a second tee connector.

[0005] As a further improvement of this utility model, the single-tooth rolling roller and the double-tooth rolling roller are respectively fixed to the corresponding telescopic rod by pins.

[0006] As a further improvement of this utility model, both the single-tooth rolling wheel and the double-tooth rolling wheel are made of cemented carbide and have a wheel-like structure with an outer tip, a thick center, and a through hole. The radius of their tips is consistent with the arc of the bottom of the thread to be rolled, and the included angle of the tooth tips is not greater than the thread profile angle. The slope of the line connecting the two tooth tips of the double-tooth rolling wheel is consistent with the thread being machined, the pitch of the double-tooth tip is consistent with the thread pitch, and after installation, the center of the two teeth of the double-tooth tip rolling wheel is aligned with the center of the single-tooth rolling wheel.

[0007] As a further improvement of this utility model, the hydraulic pump is equipped with a pressure adjustment knob and a pressure gauge, and has the function of setting and maintaining the pressure.

[0008] As a further improvement of this utility model, the base is fixed to the lathe slide box by a plurality of connecting screws.

[0009] The beneficial effects of this utility model are: the external thread cold rolling device described in this utility model can realize the cold rolling operation of the thread bottom, and the deformation of the thread bottom is uniform; and it can realize the balanced force of the rolling wheel during the rolling process, eliminating the force on the lathe spindle in the vertical direction and reducing the wear and tear on the lathe equipment. Attached Figure Description

[0010] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the second-view structure of the present invention; Figure 3 This is a schematic diagram of the structure of a single-tooth rolling roller and a double-tooth rolling roller according to this utility model.

[0011] In the diagram: 1. Base; 2. Support frame; 3. Hydraulic cylinder; 4. Telescopic rod; 5. Single-tooth rolling roller; 6. Double-tooth rolling roller; 7. Pin; 8. Outlet pipe one; 9. Outlet pipe two; 10. Hydraulic pump; 11. Connecting screw; 12. Lathe slide box; 13. External threaded connector. Detailed Implementation

[0012] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0013] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0014] like Figure 1-3As shown, an external thread cold rolling device includes a base 1, which is fixed on a lathe slide box 12. Two support frames 2 are installed on the base 1, and the two support frames 2 are symmetrically distributed about the thread rotation center. Each support frame 2 is equipped with a hydraulic cylinder 3. The ends of the telescopic rods 4 of the two hydraulic cylinders 3 are respectively equipped with a single-tooth rolling wheel 5 and a double-tooth rolling wheel 6. A hydraulic pump 10 is fixed on the base 1. Each hydraulic cylinder 3 is connected to a first outlet pipe 8 and a second outlet pipe 9. The two first outlet pipes 8 are connected to the first outlet of the hydraulic pump 10 through a first tee connector, and the two second outlet pipes 9 are connected to the second outlet of the hydraulic pump 10 through a second tee connector.

[0015] The base 1 is a steel plate structure. In this embodiment, six connecting screws 11 are used to fix the base to the lathe slide box 12. The actual number of connecting screws 11 can be increased or decreased. Two support frames 2 are provided on the base 1. In this embodiment, the support frames 2 are welded to the base 1. The position of the support frames 2 is determined by the thread size of the threaded connector 13. In practice, the support frames 2 can also be made movable to accommodate different thread sizes. The two support frames are symmetrically distributed around the thread rotation center. Each support frame 2 is equipped with a hydraulic cylinder 3. The telescopic rod 4 of the hydraulic cylinder 3 can extend and retract horizontally. The front end of the telescopic rod 4 is machined with a groove and a through hole structure. Single-tooth rolling roller 5 and double-tooth rolling roller 6 are respectively fixed to the two telescopic rods 4 using pins 7.

[0016] The single-tooth rolling roller 5 and the double-tooth rolling roller 6 are respectively fixed to the corresponding telescopic rod 4 by pins 7.

[0017] Both the single-tooth rolling wheel 5 and the double-tooth rolling wheel 6 are made of cemented carbide and have a wheel-like structure with an outer pointed tip, a thick center, and a through hole. The radius of their tips matches the arc of the thread root to be rolled, forming an angle between the tooth tips that is no greater than the thread profile angle. The slope of the line connecting the two tooth tips of the double-tooth rolling wheel 6 matches the machined thread, and the double-tooth pitch matches the thread pitch. After installation, the centers of the two teeth of the double-tooth rolling wheel are aligned with the center of the single-tooth rolling wheel 5. Figure 3 As shown.

[0018] The hydraulic pump 10 is equipped with a pressure adjustment knob and a pressure gauge, and has the function of setting and maintaining a pressure.

[0019] The operating steps for using this utility model are as follows: S1. Fix the external threaded connector 13 onto the lathe and clamp it in place; S2. After operating the lathe slide box 12 to place the single-tooth rolling roller 5 at the end of the thread and then put it in neutral, the double-tooth rolling roller 6 is also at the end of the thread. S3. Start the pump and adjust the hydraulic pump 10 rolling pressure to the process requirement value; S4. Start the lathe spindle to rotate, and the rolling roller rolls the thread under the thread. S5. After the single-tooth rolling roller 5 completes the thread rolling, stop the rotation of the lathe spindle to complete the rolling operation.

[0020] This invention enables cold rolling of thread root, ensuring uniform deformation of thread root, and balancing the force on the rolling wheel during the rolling process, eliminating the force on the lathe spindle in the vertical direction and reducing wear on the lathe equipment.

[0021] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, component disassembly or combination, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cold rolling device for external thread root, characterized in that: The system includes a base fixed to a lathe slide box. Two support frames are mounted on the base, symmetrically distributed around the threaded rotation center. Each support frame is equipped with a hydraulic cylinder. The ends of the telescopic rods of the two hydraulic cylinders are respectively equipped with a single-tooth rolling roller and a double-tooth rolling roller. A hydraulic pump is fixed on the base. Each hydraulic cylinder is connected to a first outlet pipe and a second outlet pipe. The first outlet pipes are connected to the first outlet of the hydraulic pump through a first tee connector, and the second outlet pipes are connected to the second outlet of the hydraulic pump through a second tee connector.

2. The external thread cold rolling device according to claim 1, characterized in that: The single-tooth rolling roller and the double-tooth rolling roller are respectively fixed to the corresponding telescopic rod by pins.

3. The external thread cold rolling device according to claim 1, characterized in that: Both the single-tooth and double-tooth rolling rollers are made of cemented carbide and have a wheel-like structure with an outer pointed tip, a thick center, and a through hole. The radius of the tip is consistent with the arc of the bottom of the thread to be rolled, and the included angle of the tooth tip is not greater than the thread profile angle. The slope of the line connecting the two tooth tips of the double-tooth rolling roller is consistent with the thread being machined. The pitch of the double-tooth tip is consistent with the thread pitch, and after installation, the center of the two teeth of the double-tooth tip rolling roller is aligned with the center of the single-tooth rolling roller.

4. The external thread cold rolling device according to claim 1, characterized in that: The hydraulic pump is equipped with a pressure adjustment knob and a pressure gauge, and has the function of setting and maintaining a pressure.

5. The external thread cold rolling device according to claim 1, characterized in that: The base is fixed to the lathe slide box by multiple connecting screws.

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