Steel ball rolling forming cutter

Abstract

The utility model discloses a steel ball rolling forming cutter which comprises a bearing steel ball, a lock nut and a cutter handle, and a high-pressure-resistant component is installed between the lock nut and the cutter handle. The high-pressure-resistant part is mainly composed of a shell and a rolling supporting body, and the rolling supporting body which can rotate and forms a supporting posture with a bearing steel ball is installed in the shell. The shell and the lock nut are fixedly installed, the bearing steel ball is movably limited in the shell through the lock nut, the rolling supporting body is a roller, the roller and the shell are rotatably installed through a pressure-bearing bearing and a pin shaft, the pin shaft is installed in the shell, and the rotatable roller is installed on the outer side of the pin shaft through the pressure-bearing bearing. According to the steel ball rolling forming cutter, the bearing steel balls are movably installed on the cutter handle, the bearing steel balls are supported through the high-pressure-resistant component, the good pressure bearing capacity is achieved, the rolling machining requirement is met, rough surfaces can be machined, and the use of workpieces and the retention of lubricating oil are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machining tools, in particular to a steel ball rolling forming tool, also called a rolling tool. Background Technique

[0002] The rolling tool is a plastic processing method of mechanical non-cutting that uses the principle of mechanical extrusion to obtain a mirror-smooth metal surface. The rolling tool can utilize the plastic deformation of the metal at room temperature to flatten the microscopic unevenness on the surface of the workpiece, thereby achieving the purpose of changing the surface layer structure, mechanical properties, shape and size. No matter what kind of metal processing tool is used, fine concave and convex knife marks will always be left on the surface of the part, showing an alternating undulating peak-valley phenomenon. The rolling tool is a plastic processing method of mechanical non-cutting that uses the principle of mechanical extrusion to obtain a mirror-smooth metal surface.

[0003] Conventional rolling tools all use the method of roller rolling. Usually, a line contacts the surface of the workpiece for rolling operation. However, according to different processing requirements, the current rolling tool is mainly for mirror processing during the processing process, and the rolling pressure cannot withstand the pressure when plastic. As a result, the tool is frequently damaged. During the processing of some shaft parts and pipe parts, a relatively rougher surface of the interface and a relatively smoother surface of the cutting surface are required, which can improve the use of the workpiece and the retention of lubricating oil. Therefore, a special tool is proposed for the processing of such workpieces. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a steel ball rolling forming tool to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] The steel ball rolling forming tool includes bearing steel balls, lock nuts and tool shanks, and a high-pressure resistant component is installed between the lock nut and the tool shank;

[0007] The high-pressure resistant component mainly consists of a shell and a roller. A roller that can rotate and forms a supporting posture with the bearing steel ball is installed inside the shell;

[0008] The shell is fixedly installed with the lock nut, and the bearing steel ball is movably restricted inside by the lock nut.

[0009] As a further scheme of the utility model: The roller is rotatably installed with the shell through a pressure-bearing bearing and a pin shaft. A pin shaft is installed inside the shell, and a rotatable roller is installed outside the pin shaft through a pressure-bearing bearing. Retaining rings for limiting and fixing the pin shaft are arranged at both ends of the pin shaft.

[0010] As a further solution of the present utility model: the number of the roller wheels is two, symmetrically distributed on one side of the bearing steel balls, and rolling grooves which can be attached to the outer sides of the bearing steel balls are formed on the outer sides of the roller wheels.

[0011] As a further solution of the present utility model: the housing and the tool shank are rotatably connected through a universal joint.

[0012] As a further solution of the present utility model: a bearing seat is installed at the right end of the housing, and the outer side of the bearing seat is rotatably installed with the universal joint through a ball bearing.

[0013] As a further solution of the present utility model: the right end of the bearing seat is rotatably installed with the universal joint through a plain bearing.

[0014] As a further solution of the present utility model: the bearing seat is installed at an eccentric position of the housing.

[0015] As a further solution of the present utility model: the rolling support body is a roller, a roller raceway is formed in the housing, and the roller is in the roller raceway.

[0016] As a further solution of the present utility model: a surrounding column is arranged in the roller raceway, and the roller forms a circulating rolling route in the roller raceway on the outer side of the surrounding column.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] For this steel ball roll forming tool, by movably installing the bearing steel balls on the tool shank and supporting the bearing steel balls through high-pressure resistant components, it has good pressure bearing capacity, meets the requirements of roll forming processing, can process a rough surface, and has improvements in both the use of the workpiece and the retention of lubricating oil. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of a steel ball roll forming tool;

[0020] Figure 2 It is a top view sectional view of the structure of a steel ball roll forming tool;

[0021] Figure 3 It is an exploded view of the structure of a steel ball roll forming tool;

[0022] Figure 4 It is a schematic structural diagram of the roller raceway in a steel ball roll forming tool;

[0023] Figure 5 It is a top view sectional view of the structure of a steel ball roll forming tool.

[0024] In the figure: 1. Bearing steel ball; 2. Lock nut; 3. Housing; 4. Universal seat; 5. Tool shank; 6. Pin shaft; 7. Retaining ring; 8. Pressure-bearing bearing; 9. Roller; 10. Bearing seat; 11. Ball bearing; 12. Plain bearing; 13. Roller raceway; 14. Roller; 15. Surrounding column. Detailed implementation mode

[0025] Embodiment 1

[0026] Please refer to Figures 1 to 3 , in the embodiment of the present utility model, the steel ball roll-forming tool includes a bearing steel ball 1, a lock nut 2 and a tool shank 5, and a high-pressure-resistant component is installed between the lock nut 2 and the tool shank 5;

[0027] The high-pressure-resistant component mainly consists of a housing 3 and a roller 9. A rotatable roller 9 that forms a supporting posture with the bearing steel ball 1 is installed inside the housing 3;

[0028] The housing 3 is fixedly installed with the lock nut 2. The bearing steel ball 1 is movably restricted inside by the lock nut 2. By using the bearing steel ball 1 for roll pressing, a corrugated or uneven shape can be formed on the surface of the workpiece, and there is no burr on the cross-section. The uneven surface after cutting can be roll pressed smooth, while retaining a certain degree of unevenness, reducing the metal powder generated during the friction of the workpiece components. At the same time, it can better retain the lubricant, reduce friction, protect the surface of the workpiece and extend the service life. The bearing steel ball 1 is spherical. Therefore, factors such as friction, wear resistance, and pressure-bearing capacity during its operation need to be considered. For this reason, a rotatable roller 9 is configured to rotate together with the bearing steel ball 1 to reduce the loss caused by its friction and extend the service life of the tool. At the same time, the roller 9 forms a supporting posture for the bearing steel ball 1. When contacting the workpiece, the roller 9 and the workpiece form a three-point fixation, similar to three-point clamping, to fix the position of the bearing steel ball 1 and prevent the bearing steel ball 1 from displacing and contacting and rubbing other non-rotating components, causing unnecessary losses. When the force directions of the three support points are the center of the bearing steel ball 1 and the included angle of the force directions is 120°, the displacement of the bearing steel ball 1 can be effectively prevented, and the rolling and pressing stability of the bearing steel ball 1 can be maintained. There is no need for other support points to maintain the neutral position of the bearing steel ball 1, maximizing the reduction of wear.

[0029] In a preferred implementation mode, the roller 9 is rotatably installed with the housing 3 through a pressure-bearing bearing 8 and a pin shaft 6. The pin shaft 6 is installed inside the housing 3, and a rotatable roller 9 is installed outside the pin shaft 6 through a pressure-bearing bearing 8. Retaining rings 7 for limiting and fixing the pin shaft 6 are provided at both ends of the pin shaft 6. This method can set the installation direction form of the pressure-bearing bearing 8 into a quick-disassembly and quick-assembly method. Although the bearing steel ball 1 can extend the service life and bear high-pressure loads during roll pressing at the same time, the pressure-bearing bearing 8 and the bearing steel ball 1 are always consumable parts. The replacement and assembly of this accessory need to be fast and convenient, and the replaceable consumable parts can reduce the tool processing and replacement costs.

[0030] In a preferred embodiment, the number of rollers 9 is two, symmetrically distributed on one side of the bearing steel balls 1. A rolling groove is provided on the outer side of the roller 9, which can fit with the outer side of the bearing steel balls 1. The purpose of the rolling groove is to prevent the bearing steel balls 1 from shifting forward and backward and keep them in a neutral position.

[0031] In a preferred embodiment, the housing 3 and the tool shank 5 are rotatably connected through a universal joint 4. The rolling direction of the pressure-bearing bearing 8 is fixed, but the plastic processing direction of the bearing steel balls 1 is not necessarily the same and will change with the programmed tool path, resulting in wear due to inconsistent rotation angles between the bearing steel balls 1 and the pressure-bearing bearing 8. Therefore, a rotatable universal joint 4 is installed to meet the angle switching requirements, and the pressure-bearing bearing 8 is a spherical roller bearing.

[0032] In a preferred embodiment, a bearing seat 10 is installed at the right end of the housing 3. The outer side of the bearing seat 10 is rotatably installed with the universal joint 4 through a ball bearing 11. The function of the ball bearing 11 is to limit the housing 3 so that the housing 3 can only rotate in a set direction.

[0033] In a preferred embodiment, the right end of the bearing seat 10 is rotatably installed with the universal joint 4 through a plain bearing 12. The pressure-bearing capacity of the ball bearing 11 is crossed, and the phenomenon of bearing ring detachment is likely to occur. Therefore, a plain bearing 12 is needed to strengthen the fixing method so that it can bear the force when subjected to an axial force.

[0034] In a preferred embodiment, the bearing seat 10 is installed at an eccentric position of the housing 3. During the rolling process of the bearing steel balls 1, when being pulled, the bearing seat 10 can better trigger the rotation of the universal joint 4 to adjust the rolling direction. The eccentric distance between the bearing seat 10 and the housing 3 does not exceed 2 mm. While changing the direction to adjust the rolling direction, it ensures that the bearing steel balls 1 are in a neutral position.

[0035] Embodiment 2

[0036] Please refer to Figure 4 , in the embodiment of the present utility model, the steel ball roll forming tool includes bearing steel balls 1, a lock nut 2 and a tool shank 5, and a high-pressure resistant component is installed between the lock nut 2 and the tool shank 5;

[0037] The high-pressure resistant component is mainly composed of a housing 3 and a rolling support body. A rolling support body that can rotate and form a support posture with the bearing steel balls 1 is installed inside the housing 3;

[0038] The housing 3 is fixedly installed with the lock nut 2, and the bearing steel balls 1 are movably restricted inside by the lock nut 2.

[0039] In a preferred embodiment, the rolling support is a roller 14. A roller raceway 13 is provided in the housing 3. The roller 14 is located in the roller raceway 13. A surrounding column 15 is provided in the roller raceway 13. The roller 14 forms a circulating rolling path in the roller raceway 13 on the outer side of the surrounding column 15. This technical solution does not require the preparation of a universal joint seat 4, has free movement, and a simple structure. It requires the preparation of lubricant, but it is not easy to replace after wear occurs inside. The roller 14 as the rolling support improves the flexibility of the rolling of the bearing steel ball 1. However, it uses point support and has limited pressure-bearing capacity, and is suitable for rolling flat surfaces and metal workpieces with relatively low hardness.

[0040] Steel ball roll forming tool and its plastic processing method, a method for plastic processing using a steel ball roll forming tool, specifically including the following steps;

[0041] S1: Clamp the workpiece to be processed, hold it stably and maintain coaxiality. Install the tools required for processing, including rough turning tools, finish turning tools, and steel ball roll forming tools. After assembling the tools on the tool holder, perform tool setting one by one to determine the coordinates. It is also possible to assemble and use a steel ball roll forming tool with a rolling support of a roller 14 and a steel ball roll forming tool with a rolling support of a roller wheel 9 at the same time. By switching the tools, use the steel ball roll forming tool with a rolling support of a roller 14 during mirror processing, and use the steel ball roll forming tool with a rolling support of a roller wheel 9 for processing when high-pressure rolling is required. This can not only extend the service life of the tool, but also improve the processing quality;

[0042] S2: Tool setting of the steel ball roll forming tool. The force direction when the bearing steel ball 1 contacts the outer wall or inner wall of the workpiece is F1, and the force direction when the bearing steel ball 1 contacts the roller wheel 9 is F2. When setting the tool of the steel ball roll forming tool, it is necessary to keep the force directions of F1 and F2 facing the center of the bearing steel ball 1. For the steel ball roll forming tool with a rolling support of a roller wheel 9 during the rolling process, if the pressure is too high or there is resistance on the rolling surface, it may cause the bearing steel ball 1 to lose its neutral position, resulting in wear or even jamming. There are two effective solutions to this situation. Method 1: Reduce the feed rate, reduce the single-pass rolling depth, and adopt a processing method of multiple times with small amounts to avoid the bearing steel ball 1 losing its neutral position. Method 2: Within the pressure-bearing range of the steel ball roll forming tool, by adjusting the rolling angle of the steel ball roll forming tool with a rolling support of a roller wheel 9, make the force direction of F1 the center of the bearing steel ball 1 to avoid the bearing steel ball 1 losing its neutral position;

[0043] S3: Program the numerical control machine tool, including rough turning programming, finish turning programming, and rolling programming. For the finish turning programming, leave a rolling forming processing allowance of 0.01 - 0.015 mm for finish turning. The rolling forming processing allowance left by finish turning can reach the finished product size of the workpiece after rolling forming mirror processing. The allowance varies according to different material hardnesses, increasing the surface density and hardness of the workpiece.

[0044] S4: Programming of the ball rolling forming tool. Since the ball rolling forming tool uses a rolling process, no chips are generated. During the operation of the ball rolling forming tool, the bearing ball 1 does not need to leave the workpiece surface. Only the Z-axis coordinate is changed during the operation. The feed rate of the Z-axis coordinate is programmed according to the actual workpiece processing requirements, simplifying the workpiece processing steps, and having accurate dimensions and fault tolerance;

[0045] S5: According to the programming, the ball rolling forming tool can complete mirror surface processing, concave-convex surface processing, reticulate surface processing, spiral thread processing, and ring groove processing. For mirror surface processing, a ball rolling forming tool with a roller 14 as the rolling support is used for processing to achieve the required processing dimensions and improve the surface density and hardness. After mirror surface processing, for concave-convex surface processing, a ball rolling forming tool with a roller 9 as the rolling support is used for rolling forming. Since the hardness of the workpiece surface is increased after mirror surface processing, a ball rolling forming tool that can provide higher pressure to deform the surface is required for concave-convex surface processing. By adjusting the feed rate of the Z-axis feed, a spiral thread is formed. When the tool exits, a reverse spiral thread feed is performed to form a reticulate pattern. Then, a ball rolling forming tool with a bearing ball 1 one size larger in diameter is used to roll the edge of the spiral thread to make its arc larger, finally forming a concave-convex surface. Compared with processing technologies such as honing, the concave-convex surface formed by rolling can not only improve the density and hardness of the inner hole surface of the workpiece, but also roll the peaks generated by cutting flat, greatly improving its wear resistance. At the same time, the concave-convex structure has a good oil storage space, which is more conducive to forming an oil film and reducing friction. In terms of processing, no honing equipment and oilstone equipment are required, and all processing steps can be completed on a single machine tool, simplifying the workpiece processing process. There is no need to transfer the workpiece, which can not only save the time for workpiece clamping, but also there is no tool setting deviation affecting the workpiece accuracy, further improving the quality of workpiece processing;

[0046] S6: Cutting fluid should be added during the rolling forming operation to cool and lubricate the ball rolling forming tool and the workpiece.

[0047] It should be noted that the above embodiments all belong to the same inventive concept of the utility model. The descriptions of the embodiments have their own focuses. For the parts not described in detail in individual embodiments, reference can be made to the descriptions in other embodiments.

[0048] The above-described embodiments only represent the implementation modes of the present utility model. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be pointed out that for those of ordinary skill in the art, without departing from the inventive concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

[0049] It should be noted that the above embodiments all belong to the same utility model concept. The descriptions of each embodiment have their own focuses. For the parts not described in detail in individual embodiments, reference can be made to the descriptions in other embodiments.

[0050] The above-described embodiments only express the implementation manners of the present utility model. The descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A steel ball roll forming knife, comprising a bearing steel ball (1), a lock nut (2) and a knife handle (5), characterized in that: A high-pressure resistant component is installed between the lock nut (2) and the knife handle (5); The high-pressure resistant component is mainly composed of a housing (3) and a rolling support body, wherein the housing (3) is internally mounted with a rotatable rolling support body that forms a supporting posture with the bearing steel ball (1); The housing (3) and the lock nut (2) are fixedly mounted, and the bearing steel ball (1) is movably restricted inside by the lock nut (2); The rolling support body is a roller (9), and the roller (9) is rotatably mounted on the housing (3) via a pressure bearing (8) and a pin (6); the pin (6) is mounted inside the housing (3), and the rotatable roller (9) is mounted on the outside of the pin (6) via the pressure bearing (8); retaining rings (7) are provided at both ends of the pin (6) to limit and fix the pin (6); The number of the rollers (9) is two, which are symmetrically distributed on one side of the bearing steel ball (1); the outer side of the rollers (9) is provided with a rolling groove that can fit with the outer side of the bearing steel ball (1).

2. The steel ball roll forming knife according to claim 1, characterized in that: The housing (3) and the knife handle (5) are rotatably connected via a universal seat (4).

3. The steel ball roll forming knife according to claim 2, characterized in that: A bearing seat (10) is installed at the right end of the housing (3), and the outer side of the bearing seat (10) is rotatably mounted on the universal seat (4) via a ball bearing (11).

4. The steel ball roll forming knife according to claim 3, characterized in that: The right end of the bearing seat (10) is rotatably mounted on the universal seat (4) via a plane bearing (12).

5. The steel ball roll forming knife according to claim 3, characterized in that: The bearing seat (10) is installed at an eccentric position of the housing (3).

6. A steel ball roll forming knife, comprising a bearing steel ball (1), a lock nut (2) and a knife handle (5), characterized in that: A high-pressure resistant component is installed between the lock nut (2) and the knife handle (5); The high-pressure resistant component is mainly composed of a housing (3) and a rolling support body, wherein the housing (3) is internally mounted with a rotatable rolling support body that forms a supporting posture with the bearing steel ball (1); The housing (3) and the lock nut (2) are fixedly mounted, and the bearing steel ball (1) is movably restricted inside by the lock nut (2); The rolling support body is a roller (14), a roller track (13) is provided in the housing (3), and the roller (14) is on the roller track (13); A surrounding column (15) is arranged in the roller track (13), and the rollers (14) form a circulating rolling route on the roller track (13) outside the surrounding column (15).

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