A pre-stressed combined die for forging a mechanical bearing ring

Abstract

The utility model provides a kind of prestressed combined mould for mechanical bearing ring forging, belong to bearing mould technical field, the prestressed combined mould for mechanical bearing ring forging, including bearing ring half side abrasive tool, bearing ring half side abrasive tool is equipped with two;Prestressed sleeve, prestressed sleeve is equipped with two groups, and each group prestressed sleeve includes forging forming groove, prestressed ring, cable sliding slot, prestressed cable, centripetal sliding slot, centripetal sliding block, cable fixed clamp and return spring, forging forming groove is set in the inner wall of one side of bearing ring half side abrasive tool, prestressed ring is fixedly connected in the upper end of bearing ring half side abrasive tool, cable sliding slot is set in the side end of prestressed ring, ensure that the tension force of left and right sides is highly consistent, make two bearing ring half side abrasive tool even adhere along parting surface, significantly improve the symmetry and uniformity of mould stress.

Description

Technical Field

[0001] This utility model belongs to the field of bearing mold technology, specifically relating to a prestressed combined mold for forging mechanical bearing rings. Background Technology

[0002] In the field of mechanical bearing manufacturing, bearing rings are a core component, and their performance directly affects the bearing's rotational accuracy, load-bearing capacity, and service life. Forging, as a key process in bearing ring production, can effectively improve the distribution of metal flow lines and enhance the material's density and mechanical properties.

[0003] Traditional bearing ring forging dies often employ a split structure, consisting of two halves of the die, which are kept closed by external fasteners (such as bolts, clamps, etc.) or the clamping force of a press. Manual tightening makes it difficult to ensure that all bolts are subjected to uniform force, resulting in uneven stress on the die, localized stress concentration, and a tendency for the die to deform or suffer premature fatigue damage. Utility Model Content

[0004] The purpose of this utility model is to provide a prestressed combined mold for forging mechanical bearing rings, which aims to solve the problem that manual tightening in the prior art makes it difficult to ensure that all bolts are subjected to consistent force, resulting in uneven force on the mold, local stress concentration, and easy deformation or early fatigue damage of the mold.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A prestressed composite mold for forging mechanical bearing rings includes:

[0007] A bearing ring half-shaped grinding mold, wherein two bearing ring half-shaped grinding molds are provided;

[0008] The prestressing kit comprises two sets, each set including a forging groove, a prestressing ring, a cable groove, a prestressing cable, a radial groove, a radial slider, a cable fixing clamp, and a return spring. The forging groove is formed on one inner wall of the bearing ring half-mold. The prestressing ring is fixedly connected to the upper end of the bearing ring half-mold. The cable groove is formed on one side of the prestressing ring, and the prestressing cable is disposed within the cable groove. The radial groove is formed on one side of the prestressing ring, and the radial slider is slidably connected within the radial groove. The return spring is fixedly connected to one inner wall of the radial groove and one side of the radial slider. The cable fixing clamp is fixedly connected to one side of the radial slider to fix the side end of the prestressing cable.

[0009] As a preferred embodiment of this utility model, a rotating ring is fixedly connected to the upper end of the bearing ring half-grinding mold, and a threaded swivel is rotatably connected inside the rotating ring. A threaded groove is formed on the inner circumference of the threaded swivel, and a slider is threadedly connected to the threaded groove to compress the threaded sleeve.

[0010] In a preferred embodiment of this utility model, a limiting groove is provided on one side of the prestressed ring, and a limiting slider is fixedly connected to one side of the slider pressing the threaded sleeve, and the limiting slider slides within the limiting groove.

[0011] In a preferred embodiment of this utility model, one end of the slider pressing the threaded sleeve and one end of the cable fixing clamp are both inclined surfaces and contact each other during sliding.

[0012] As a preferred embodiment of this utility model, the outer surface of the threaded swivel ring is provided with a protruding friction ring.

[0013] As a preferred embodiment of this utility model, the lower ends of the two bearing ring half-grinding molds are fixedly connected to clamping slide rails.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In this solution, through threaded transmission and inclined plane pushing action, the cable fixing clamps on both sides move almost simultaneously to tension the prestressed cable at equal intervals. This mechanical linkage structure fundamentally avoids the difference in sequence and force caused by manually operating the bolts one by one, ensuring that the tension applied on the left and right sides is highly consistent, so that the two bearing ring half molds fit evenly along the parting surface, significantly improving the symmetry and uniformity of the mold force.

[0016] 2. In this solution, the threaded drive has the characteristics of a clear transmission ratio and controllable displacement. The operator can apply precise and repeatable preload according to the process requirements, avoiding the randomness of excessive or insufficient preload caused by manual tightening based on experience. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a three-dimensional structural view of the present invention;

[0019] Figure 2 This is an exploded view of the structure of this utility model;

[0020] Figure 3 This is an exploded cross-sectional view of the structure of this utility model;

[0021] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle.

[0022] In the diagram: 1. Bearing ring half-mold; 2. Forging forming groove; 3. Prestressed ring; 4. Cable groove; 5. Prestressed cable; 6. Centripetal groove; 7. Centripetal slider; 8. Cable fixing clamp; 9. Return spring; 10. Rotating ring; 11. Threaded swivel; 12. Threaded groove; 13. Slider pressing threaded sleeve; 14. Limiting groove; 15. Limiting slider; 16. Protruding friction ring; 17. Clamping rail. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] Please see Figures 1-4 The present invention provides the following technical solution:

[0026] A prestressed composite mold for forging mechanical bearing rings includes:

[0027] Bearing ring half-shaped grinding mold 1, two bearing ring half-shaped grinding molds 1 are provided;

[0028] The prestressing kit consists of two sets. Each set includes a forging groove 2, a prestressing ring 3, a cable groove 4, a prestressing cable 5, a radial groove 6, a radial slider 7, a cable fixing clamp 8, and a return spring 9. The forging groove 2 is located on one inner wall of the bearing ring half-mold 1. The prestressing ring 3 is fixedly connected to the upper end of the bearing ring half-mold 1. The cable groove 4 is located on one side of the prestressing ring 3. The prestressing cable 5 is located in the cable groove 4. The radial groove 6 is located on one side of the prestressing ring 3. The radial slider 7 is slidably connected in the radial groove 6. The return spring 9 is fixedly connected to one inner wall of the radial groove 6 and one side of the radial slider 7. The cable fixing clamp 8 is fixedly connected to one side of the radial slider 7 to fix the side of the prestressing cable 5.

[0029] In a specific embodiment of this utility model, the two halves of the grinding mold are closed and pre-tightened by a prestressing kit. Each prestressing kit includes a forging groove 2 opened on the inner wall of one side of the bearing ring half grinding mold 1, which is used to accommodate the bearing ring blank and complete the final forming, ensuring the dimensional accuracy and surface quality of the forging. A prestressing ring 3 is fixedly connected to the upper end of the bearing ring half grinding mold 1. A cable groove 4 and a radial groove 6 are opened on one side of the prestressing ring 3. A prestressing cable 5 is provided in the cable groove 4, which can slide freely along the groove to transmit the pre-tightening force. A radial slider 7 is slidably fitted in the radial groove 6. One end of a return spring 9 is fixed to the inner wall of the radial groove 6, and the other end is connected to the radial slider 7 to provide outward return elastic force. A cable fixing clamp 8 is fixedly connected to the outer end of the radial slider 7 to clamp and lock the end of the prestressing cable 5. During operation, one end of the prestressing cable 5 is passed through the cable groove 4 and placed under the cable fixing clamp 8, and pulled by external force. The other end of the prestressed cable 5 is moved to tension it. At this time, the cable fixing clamp 8, driven by the centripetal slider 7, overcomes the elastic force of the return spring 9 and slides inward along the centripetal groove 6, realizing automatic clamping and locking of the prestressed cable 5. As the prestressed cables 5 on both sides are tensioned synchronously, the two bearing ring half-molds 1 are pulled and fitted together to form a complete closed forging cavity, which effectively improves the overall rigidity of the mold, resists the huge impact load generated during forging, prevents the mold parting surface from opening and flash from being generated, and improves the accuracy of forgings and the service life of the mold. When disassembly is required, the reverse force is applied to move the cable fixing clamp 8 outward, releasing the clamping of the prestressed cable 5. The return spring 9 pushes the centripetal slider 7 back to its original position, and the prestressed cable 5 relaxes, which facilitates quick separation of the mold. This structure replaces the traditional bolt connection with a mechanical prestressing method, which has the advantages of uniform pre-tightening force, convenient operation, rapid response, and high repeatability positioning accuracy. It is suitable for the hot forging production environment of high-strength and high-precision bearing rings.

[0030] Please refer to the details. Figures 1-4 A rotating ring 10 is fixedly connected to the upper end of the bearing ring half-grinding mold 1. A threaded swivel ring 11 is rotatably connected inside the rotating ring 10. A threaded groove 12 is opened on the inner circumference of the threaded swivel ring 11. A slider extrusion threaded sleeve 13 is threadedly connected inside the threaded groove 12.

[0031] In this embodiment: a rotating ring 10 is fixedly connected to the upper end of the bearing ring half-grinding mold 1. A threaded swivel ring 11 is rotatably connected inside the rotating ring 10 through a bearing or sliding fit. The inner circumference of the threaded swivel ring 11 is provided with a continuous threaded groove 12. A slider pressing threaded sleeve 13 is threadedly connected in the threaded groove 12. One end of the slider presses the threaded sleeve 13 and extends outward from the outside of the threaded swivel ring 11 and toward the cable fixing clamp 8. When prestress needs to be applied, the threaded swivel ring 11 is rotated. Since the slider pressing threaded sleeve 13 is limited by the external limit and cannot rotate, it can only move axially. Therefore, under the action of threaded transmission, the slider pressing threaded sleeve 13 generates a linear feed motion, and its extended end gradually pushes inward, thereby driving the subsequent clamping mechanism to move.

[0032] Please refer to the details. Figures 1-4 A limiting groove 14 is provided on one side of the prestressed ring 3, and a limiting slider 15 is fixedly connected to one side of the slider extruding threaded sleeve 13. The limiting slider 15 slides in the limiting groove 14.

[0033] In this embodiment: a limiting groove 14 is provided on one side of the prestressed ring 3, and a limiting slider 15 is fixedly connected to one side of the slider pressing threaded sleeve 13. The limiting slider 15 is embedded in the limiting groove 14 and can slide along its length to form a guiding and anti-rotation structure. When the threaded ring 11 is rotated, the slider pressing threaded sleeve 13 moves axially under the action of thread transmission. Its movement direction is limited by the sliding path of the limiting slider 15 in the limiting groove 14, preventing the slider pressing threaded sleeve 13 from rotating with the threaded ring 11 and ensuring that it can only perform linear feed motion.

[0034] Please refer to the details. Figures 1-4 The slider pressing threaded sleeve 13 and the cable fixing clamp 8 are both inclined surfaces and contact each other during sliding.

[0035] In this embodiment, one end of the slider pressing threaded sleeve 13 and one end of the cable fixing clamp 8 are both machined into mutually matching inclined contact surfaces. When the slider pressing threaded sleeve 13 is pushed inward along the direction of the limiting slide groove 14 under the action of thread transmission, its end inclined surface gradually makes sliding contact with the corresponding inclined surface of the cable fixing clamp 8. As the axial displacement increases, the normal pressure between the inclined surfaces pushes the cable fixing clamp 8 to overcome the elastic force of the return spring 9 and move towards the center along the radial slide groove 6, thereby realizing the automatic clamping and locking of the prestressed cable 5. The inclined surface pushing structure converts the linear pushing motion of the slider pressing threaded sleeve 13 into the radial clamping force of the cable fixing clamp 8, which has the effects of force amplification and self-locking, ensuring that the prestressed cable 5 is firmly clamped and preventing loosening due to vibration or impact during the forging process.

[0036] Please refer to the details. Figures 1-4The outer surface of the threaded swivel ring 11 is provided with a protruding friction ring 16.

[0037] In this embodiment, a protruding friction ring 16 is provided on the outer surface of the threaded swivel 11 along the circumferential direction. The protruding friction ring 16 is a ring-shaped protrusion with a knurled anti-slip texture on its surface, which is used to increase the friction between the fingers or operating tools and the threaded swivel 11.

[0038] Please refer to the details. Figures 1-4 The lower ends of the two bearing ring halves of the mold 1 are fixedly connected to clamping slide rails 17.

[0039] In this embodiment: the lower ends of the two bearing ring half-grinding molds 1 are fixedly connected to clamping slide rails 17. The clamping slide rails 17 extend longitudinally along the outer side of the lower end of the mold and are arranged symmetrically. Their track structure matches the matching clamping mechanism on the workbench of the forging equipment. During the mold installation process, the clamping slide rails 17 can be inserted into the clamping seat of the equipment and slidably positioned along it. Then, the slide rails are firmly fixed by hydraulic or mechanical locking devices, realizing the rapid centering and stable installation of the mold as a whole on the equipment. This structure not only improves the mold installation efficiency, but also enhances the lateral stability and anti-eccentric load capacity of the mold during the forging process, effectively preventing mold displacement or misalignment caused by impact force, and ensuring forging accuracy.

[0040] The working principle and usage process of this utility model are as follows: Before forging the bearing rings, two bearing ring half-molds 1 with forging grooves 2 are first placed together on the worktable of the forging equipment. The clamping slide rail 17 fixed at the lower end cooperates with the clamping mechanism on the equipment to achieve rapid positioning and initial fixation. Then, the prestressing operation is initiated, and the threaded swivel ring 11 is rotated manually or with the aid of tools. Its protruding friction ring 16 on its outer surface provides good gripping force, preventing slippage and ensuring effective transmission of rotational torque. As the threaded swivel ring 11 rotates, the threaded grooves on its inner wall... 12 and the slider extruding threaded sleeve 13 form a threaded transmission, pushing the slider extruding threaded sleeve 13 to move axially inward; since the end of the slider extruding threaded sleeve 13 is connected to a limiting slider 15, which is embedded in the limiting groove 14 on the prestressed ring 3, it plays a guiding and anti-rotation role, ensuring that the slider extruding threaded sleeve 13 only performs linear motion; when the slider extruding threaded sleeve 13 continues to advance, the inclined surface of its end contacts the inclined surface of the cable fixing clamp 8 and relative sliding occurs, and the inclined surface pushing action converts the axial thrust into radial clamping force. The cable fixing clamp 8 drives the centripetal slider 7 to overcome the elastic force of the return spring 9 and move towards the center along the centripetal groove 6, thereby clamping the end of the prestressed cable 5. As the prestressed cables 5 on both sides are simultaneously tensioned and locked in the cable groove 4, the two bearing ring half-molds 1 are strongly pulled together to form a tightly closed forging cavity, achieving highly uniform prestress loading and significantly improving the overall rigidity and deformation resistance of the mold. At this time, the mold enters the ready-to-work state, and the heated bearing ring blank is placed into the forging groove 2, and forging pressure is applied by the press. Force is applied to complete precision forming. Because the mold is tightly closed under prestress, it effectively prevents excessive gaps at the parting surface from causing flash, thus improving the surface quality and dimensional accuracy of the forging. After forging, the threaded swivel ring 11 is rotated in the opposite direction, causing the slider to press the threaded sleeve 13 backward. Its inclined surface is disengaged from the cable fixing clamp 8. Under the elastic restoring force of the return spring 9, the centripetal slider 7 drives the cable fixing clamp 8 to return outward, releasing the clamping of the prestressed cable 5. With the prestress released, the two halves of the mold can be easily separated, the forging can be taken out, and the next cycle can be carried out.

[0041] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, 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 prestressed composite mold for forging mechanical bearing rings, characterized in that, include: A bearing ring half-grinding mold (1), wherein two bearing ring half-grinding molds (1) are provided; The prestressing kit comprises two sets, each set including a forging groove (2), a prestressing ring (3), a cable groove (4), a prestressing cable (5), a radial groove (6), a radial slider (7), a cable fixing clamp (8), and a return spring (9). The forging groove (2) is formed on one inner wall of the bearing ring half-mold (1). The prestressing ring (3) is fixedly connected to the upper end of the bearing ring half-mold (1). The cable groove (4) The prestressed cable (5) is located at one end of the prestressed ring (3), and the prestressed cable (5) is located in the cable groove (4). The centripetal groove (6) is located at one end of the prestressed ring (3), and the centripetal slider (7) is slidably connected in the centripetal groove (6). The return spring (9) is fixedly connected to one side of the inner wall of the centripetal groove (6) and one side of the centripetal slider (7). The cable fixing clamp (8) is fixedly connected to one side of the centripetal slider (7) to fix the side end of the prestressed cable (5).

2. The prestressed composite mold for forging mechanical bearing rings according to claim 1, characterized in that: The upper end of the bearing ring half-grinding mold (1) is fixedly connected to a rotating ring (10), and a threaded swivel ring (11) is rotatably connected inside the rotating ring (10). The inner circumference of the threaded swivel ring (11) is provided with a threaded groove (12), and a slider extrusion threaded sleeve (13) is threadedly connected inside the threaded groove (12).

3. The prestressed combined mold for forging mechanical bearing rings according to claim 2, characterized in that: A limiting groove (14) is provided on one side of the prestressed ring (3), and a limiting slider (15) is fixedly connected to one side of the slider extrusion threaded sleeve (13). The limiting slider (15) slides in the limiting groove (14).

4. The prestressed composite mold for forging mechanical bearing rings according to claim 3, characterized in that: The slider extruding threaded sleeve (13) and the cable fixing clamp (8) are both inclined surfaces and contact each other during sliding.

5. A prestressed composite mold for forging mechanical bearing rings according to claim 4, characterized in that: The outer surface of the threaded swivel (11) is provided with a protruding friction ring (16).

6. A prestressed composite mold for forging mechanical bearing rings according to claim 5, characterized in that: The lower ends of the two bearing ring half-grinding molds (1) are fixedly connected to clamping slide rails (17).

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