Roll finish tool for rolling finish machining of metal workpiece

Abstract

The utility model discloses a tumbling cutter for rolling finish machining of a metal workpiece, which relates to the technical field of rolling machining cutters, solves the technical problems of lower surface roughness grade, complex structure and smaller machining range in the prior art, comprises a cutter handle, and is characterized in that a pin shaft is fixedly mounted on the cutter handle; a deep groove ball bearing is installed on the pin shaft, a steel ball frame is fixedly installed at the front end of the cutter handle, a steel ball hole is formed in the front end of the steel ball frame, and a hard alloy ball is movably installed in the steel ball hole. Components are few, the structure is simple, manufacturing and maintenance are easy, and production efficiency is improved; the contact surface of the tumbling cutter is small, large pressure can be obtained, equipment load is reduced, abrasion is relieved, and the service life of equipment is prolonged; the deep groove ball bearing serving as a supporting element is small in friction coefficient and beneficial to maintaining the rolling state; and the production flexibility is improved due to the workpieces which can be subjected to roll finishing.

Description

Technical Field

[0001] The utility model relates to the technical field of rolling processing tools, in particular to a rolling burnishing tool used for rolling and finishing metal workpieces. Background Art

[0002] The technical field to which the utility model relates is rolling processing, a pressure processing method, which belongs to a precision processing technology that does not generate chips. Rolling processing causes the surface of the workpiece to produce tiny plastic deformation by bringing the rolling element of the rolling device into contact with the surface of the workpiece and applying pressure. Subsequently, through the main movement and feed movement of the workpiece or the rolling device, this tiny plastic deformation is extended to the entire surface to be processed, thereby achieving precision processing of the workpiece surface. This processing method can significantly improve the roughness level of the workpiece surface and eliminate small defects on the surface. In addition, the cold work hardening effect will also increase the hardness of the workpiece surface and enhance its wear resistance. When performing precision rolling processing, deep groove ball bearings are usually used as rolling elements, and their outer cylindrical surface is used as the rolling surface to process the surface of metal workpieces with an elongation of ≥3%.

[0003] The shortcomings of the existing technology include: Line contact between the rolling element and the workpiece surface: On the section perpendicular to the main motion direction, since the rolling element and the workpiece surface are in line contact, the rolling pressure obtained is relatively small, and more power is required to achieve the same processing accuracy. This will increase the workload of the equipment, accelerate equipment wear and precision loss. The curvature radius of the rolling surface is large: On the section perpendicular to the feed motion direction, the curvature radius of the rolling surface is large, which increases the compressive deformation range of the workpiece, resulting in a decrease in rolling pressure. In order to achieve the target precision surface, it is necessary to increase the rolling pressure, increase the power consumption and workload of the equipment, and accelerate equipment wear and precision loss. The parallel accuracy of the outer cylindrical surface is difficult to adjust: The parallel accuracy of the outer cylindrical surface element line of the rolling surface and the feed motion direction is not easy to adjust, which makes the workpiece surface prone to scaling or peeling, and the target precision requirements cannot be achieved. This is a technical problem that needs to be solved. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the utility model provides a rolling burnishing tool for rolling and finishing metal workpieces, which solves the technical problems of the existing technology such as low surface roughness level, complex structure and small processing range.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a rolling tool for rolling and finishing metal workpieces, including a tool handle, a pin is fixedly installed on the tool handle, a deep groove ball bearing is installed on the pin, a steel ball rack is fixedly installed at the front end of the tool handle, a steel ball hole is provided at the front end of the steel ball rack, a carbide ball is movably installed in the steel ball hole, and the overall shape of the carbide ball (commonly known as: tungsten steel ball) is a sphere and the material is carbide. It has the characteristics of high hardness, high surface roughness and wear resistance. The steel ball rack is a bracket-type part made of wear-resistant alloy steel. After heat treatment, it has high hardness and good wear resistance. A steel ball hole is provided in its center position, and the transition part of the steel ball hole is a local inner spherical surface with a high surface roughness. The hole is used to accommodate the carbide ball and limit the height of the carbide ball exposed outside the steel ball rack.

[0006] Preferably, a U-shaped end plate is provided at the front end of the knife handle, the pin shaft passes vertically through the front end of the knife handle, and the deep groove ball bearing is rotatably installed in the front end of the knife handle. The knife handle is a fork-rod type part. At one end of the square handle, there is a fork-shaped structure consisting of two parallel lugs. The convex shape of the outer free end of the fork-shaped structure is the same as the concave shape of the steel ball rack, which plays a positioning role. Threaded holes are provided on the upper and lower sides of the fork-shaped structure for connecting to the steel ball rack. A cylindrical through hole is also provided on the fork-shaped structure at a designed position perpendicular to the large plane.

[0007] Preferably, a pair of retaining ring grooves are formed at both ends of the pin shaft, and a pair of shaft elastic retaining rings are fixedly installed in the pair of retaining ring grooves. The two shaft elastic retaining rings are used to restrict the pin shaft on the tool handle to prevent it from falling out.

[0008] Preferably, the steel ball rack is a C-shaped rack, and four mounting claws are provided on the steel ball rack, and four mounting holes are provided on the four mounting claws. Four threaded holes are provided at the upper and lower ends of the tool handle, and screws are threadedly connected to the threaded holes. The screws pass through the four mounting holes respectively. After the roller burnishing tool is fully installed, there should be a small gap between the carbide ball and the deep groove ball bearing to ensure that the carbide ball can rotate flexibly without sticking.

[0009] Beneficial effects

[0010] The utility model provides a roller burnishing tool for rolling and finishing metal workpieces. Through rolling processing, the utility model can make the workpiece surface obtain a higher level of surface roughness and make it smoother; the rolling element of the roller burnishing tool has high hardness, and combined with the cold work hardening effect, it can improve the hardness of the workpiece surface and increase its wear resistance; rolling processing can eliminate pinhole defects on the workpiece surface and improve the surface quality; the roller burnishing tool has fewer components, a simple structure, and is easy to manufacture and maintain, thereby improving production efficiency; the roller burnishing tool has a small contact surface and can obtain a larger pressure, reduce equipment load, slow down wear, and extend equipment life; the deep groove ball bearing as a supporting element has a small friction coefficient, which is conducive to maintaining the rolling state; workpieces of different shapes and sizes can be rolled, including various surfaces of cylindrical and flat workpieces, thereby increasing production flexibility; different specifications of carbide balls, deep groove ball bearings and tool holders are selected according to the size and shape of the workpiece to improve processing adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the three-dimensional component structure of a rolling burnishing tool for rolling and finishing a metal workpiece according to the present invention.

[0012] In the figure: 1. Tool handle; 2. Pin; 3. Deep groove ball bearing; 4. Steel ball holder; 5. Carbide ball; 6. Shaft elastic ring; 7. Screw; DETAILED DESCRIPTION

[0013] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The detailed description is as follows.

[0014] See also Figure 1 The utility model provides a technical solution: a rolling tool for rolling and finishing metal workpieces, comprising a tool handle 1, a pin 2 fixedly mounted on the tool handle 1, a deep groove ball bearing 3 mounted on the pin 2, a steel ball rack 4 fixedly mounted on the front end of the tool handle 1, a steel ball hole provided at the front end of the steel ball rack 4, a carbide ball 5 movably mounted in the steel ball hole, the carbide ball 5 (commonly known as tungsten steel ball) having the overall shape of a sphere and made of carbide. The steel ball rack 4 is a bracket-type part made of wear-resistant alloy steel, having the characteristics of high hardness, high surface roughness and wear resistance. After heat treatment, it has high hardness and good wear resistance. A steel ball hole is provided in its center, and the transition part of the steel ball hole is a local inner spherical surface with a high surface roughness. The hole is used to accommodate the carbide ball 5 and limit the height of the carbide ball 5 exposed outside the steel ball rack 4.

[0015] This embodiment is further configured such that a U-shaped end plate is provided at the front end of the handle 1, the pin 2 passes vertically through the front end of the handle 1, and the deep groove ball bearing 3 is rotatably mounted in the front end of the handle 1. The handle 1 is a fork-shaped part. At one end of the square handle is a fork-shaped structure consisting of two parallel lugs. The convex shape of the outer free end of the fork-shaped structure is the same as the concave shape of the steel ball holder 4, which serves as a positioning function. Threaded holes are provided on the upper and lower sides of the fork-shaped structure for connecting to the steel ball holder 4. A cylindrical through hole is also provided on the fork-shaped structure at a designed position perpendicular to the large plane.

[0016] This embodiment is further configured such that a pair of retaining ring grooves are provided at both ends of the pin shaft 2, and a pair of shaft elastic retaining rings 6 are fixedly installed in the pair of retaining ring grooves. The two shaft elastic retaining rings 6 are used to restrict the pin shaft 2 on the tool handle 1 to prevent it from falling out.

[0017] This embodiment is further configured as follows: the steel ball rack 4 is a C-shaped rack, the steel ball rack 4 is provided with four mounting claws, the four mounting claws are provided with four mounting holes, the upper and lower ends of the tool handle 1 are provided with four threaded holes, the threaded holes are threadedly connected with screws 7, and the screws 7 pass through the four mounting holes respectively. After the roller burnishing tool is fully installed, there should be a small gap between the carbide ball 5 and the deep groove ball bearing 3 to ensure that the carbide ball 5 can rotate flexibly without getting stuck.

[0018] The detailed connection means are well known in the art; Figure 1 The roller burnishing tool shown is suitable for precision rolling of metal workpiece surfaces with an elongation of 3% or greater. It features the following features: The rolling element utilizes a carbide ball 5 (tungsten steel ball) of appropriate diameter; on the opposite side of the rolling workpoint, the carbide ball 5 contacts the outer cylindrical surface of a deep groove ball bearing 3. Under the reaction force of the working pressure, when the carbide ball 5 attempts to withdraw from the workpiece surface, the deep groove ball bearing 3 prevents it from disengaging and rotates with it to maintain the rolling state. The steel ball holder 4 is made of wear-resistant material; the carbide balls 5 are placed in counterbores in the steel ball holder 4. The steel ball holder 4 is positioned to the toolholder 1 by shape and fixed with screws 7. The deep groove ball bearing 3 is mounted to the toolholder 1 via a pin 2.

[0019] Insert the roller burnishing tool into the machining equipment and ensure it is securely installed. Adjust the machining equipment so that the roller burnishing tool contacts the surface of the metal workpiece to be machined. Turn on the machine and activate the roller burnishing tool to perform precision rolling. When the workpiece surface elongation is 3% or greater, the carbide balls 5 of the roller burnishing tool will apply pressure to the workpiece surface, causing slight plastic deformation and improving the surface roughness. During the roller burnishing operation, ensure good contact between the carbide balls 5 and the deep groove ball bearing 3 to ensure smooth rolling. During the machining process, monitor the machining quality and adjust the machining parameters to ensure the desired machining accuracy. After machining is completed, turn off the machine, remove the roller burnishing tool, and perform necessary cleaning and maintenance to extend the tool's service life.

[0020] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0021] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A rolling tool for rolling finishing of a metal workpiece, comprising a tool handle (1), characterized in that: A pin shaft (2) is fixedly mounted on the knife handle (1), a deep groove ball bearing (3) is mounted on the pin shaft (2), a steel ball rack (4) is fixedly mounted on the front end of the knife handle (1), a steel ball hole is formed at the front end of the steel ball rack (4), and a hard alloy ball (5) is movably mounted in the steel ball hole.

2. A rolling tool for rolling finishing of metal workpieces according to claim 1, characterized in that The front end of the knife handle (1) is provided with a U-shaped end plate, the pin shaft (2) vertically passes through the front end of the knife handle (1), and the deep groove ball bearing (3) is rotatably installed in the front end of the knife handle (1).

3. A rolling tool for rolling finishing of a metal workpiece according to claim 1, characterized in that A pair of retaining ring grooves are formed at both ends of the pin shaft (2), and a pair of shaft elastic retaining rings (6) are fixedly installed in the retaining ring grooves.

4. A rolling tool for rolling finishing of a metal workpiece according to claim 1, characterized in that The steel ball rack (4) is a C-shaped rack, and is provided with four mounting claws on the steel ball rack (4), and four mounting holes on the four mounting claws; four threaded holes are provided at the upper and lower ends of the shank (1), and screws (7) are threadedly connected to the threaded holes, and the screws (7) pass through the four mounting holes respectively.

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