Rolling grinding cutter assembly

Abstract

The utility model discloses a rolling grinding cutter assembly which comprises a mounting seat and a rolling ball, a mounting cavity is arranged at the front part of the mounting seat, a bearing is arranged in the mounting cavity through a shaft pin, and a positioning ring is arranged on the bearing; the rolling ball is movably installed at the front end of the installation base to form a rotatable structure, a part of the rolling ball is exposed out of the front end of the installation base, and the rolling ball makes contact with the positioning ring to form a structure capable of conducting synchronous rotating motion. According to the utility model, a workpiece subjected to semi-finish turning by a lathe can be subjected to finish machining, the surface of the workpiece is rolled by the rolling ball to finish the outer circle of the size, and high points generated during finish turning are ground and flattened on the surface, so that the compactness of the surface of the workpiece can be increased, the roughness of the surface of the workpiece is improved by 1-2 levels, and the size requirement is ensured. And meanwhile, the machining time can be shortened, the production efficiency can be improved, the cost can be reduced, damage possibly caused to the workpiece due to multiple times of transfer can be avoided, and therefore the product percent of pass is improved.

Description

Technical Field

[0001] This utility model relates to the field of industrial production equipment accessories technology, and in particular to a cutting tool for machining shaft parts. Background Technology

[0002] When machining shaft parts on a lathe, the outer diameter is left to allow for machining on the lathe before being machined by cylindrical grinding. Since most companies do not have their own cylindrical grinding equipment, they typically outsource this to specialized manufacturers. This not only results in high processing costs and long processing times, but also increases the risk of workpiece damage during transport, leading to complicated repairs and a high rate of defective products. For example, for a long shaft approximately 1 meter in length and 120 mm in diameter, the outer diameter requires allowance for machining by cylindrical grinding. The cost per piece is approximately 200 yuan, and the average processing and turnaround time is about 8 hours. This demonstrates the high cost and long processing time. Utility Model Content

[0003] This utility model addresses the shortcomings of existing technologies by providing a rolling and grinding tool assembly that is simple in structure, easy to use, low in cost, has good machining accuracy, and can save machining costs and time. It can be mainly used for the precision machining of the outer diameter of shaft parts.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a roller grinding tool assembly, characterized in that: it includes a mounting base and a ball, a mounting cavity is provided at the front of the mounting base, a bearing is mounted in the mounting cavity by means of a shaft pin, and a positioning ring is mounted on the bearing; the ball is movably mounted at the front end of the mounting base to form a rotatable structure, a portion of the ball protrudes outside the front end of the mounting base, and the ball contacts the positioning ring to form a structure that can perform synchronous rotational motion.

[0005] Furthermore, an oil tank is provided on the mounting base, and the oil outlet of the oil tank is connected to the ball bearing to deliver lubricating oil to the ball bearing.

[0006] Furthermore, the oil tank is installed above the mounting cavity, and its oil outlet is located at the bottom of the oil tank to connect with the rolling ball. This increases lubrication between the rolling ball and the workpiece during the rolling process, reduces heat generation, improves surface finish, and ensures dimensional tolerances and surface roughness requirements.

[0007] Furthermore, a fuel quantity regulating rod is installed in the fuel tank, and the fuel quantity regulating rod is movably inserted into the fuel outlet of the fuel tank to form a control structure for the fuel quantity of the fuel outlet.

[0008] Furthermore, the oil outlet has a tapered structure that is wider at the top and narrower at the bottom, and the lower end of the oil volume adjusting rod has a tapered structure that matches the shape of the oil outlet. Lifting the oil volume adjusting rod upwards increases the oil flow, inserting it downwards decreases the oil flow, and inserting it tightly shuts off the oil flow.

[0009] Furthermore, a threaded connector extends forward from the front of the mounting cavity, and a ball is movably mounted in the threaded connector through a gland, which is screwed into the threaded connector.

[0010] Furthermore, the outer surface of the positioning ring is an arc-shaped groove that matches the rolling ball, which is made of steel. The steel ball contacts the positioning ring, and the positioning ring drives the bearing to roll, which reduces resistance.

[0011] Preferably, the pressure cap and positioning ring are both made of leaded brass, which can reduce friction between materials and improve durability. The outer diameter of the workpiece after rolling is highly accurate, the roughness can be improved by two levels, and the surface structure of the outer circle of the workpiece is more dense, which improves the friction resistance and service life of the workpiece.

[0012] This invention enables the finishing of workpieces after semi-finish turning on a lathe. By using ball bearings to roll the outer diameter of the workpiece to achieve the desired dimensions, the high points created during finish turning are flattened, increasing the surface density and improving the surface roughness by 1-2 levels, thus ensuring dimensional accuracy. Simultaneously, it reduces processing time, increases production efficiency, lowers costs, and avoids potential damage to the workpiece from multiple transfers, thereby improving product yield. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the planar structure of this utility model;

[0014] Figure 2 This is a schematic cross-sectional view of the present invention.

[0015] Figure 3 This is a structural diagram of the present invention after the pressure cap has been removed;

[0016] Figure 4 This is a structural diagram of the present invention from another angle after the pressure cap has been removed;

[0017] Figure 5 This is a structural diagram showing the fit between the rolling ball and the positioning ring of this utility model.

[0018] In the diagram, 1 is the mounting base, 11 is the mounting cavity, 12 is the threaded connector, 2 is the oil tank, 3 is the positioning ring, 4 is the bearing, 5 is the ball bearing, 6 is the gland, 7 is the shaft pin, and 8 is the oil volume adjustment rod. Detailed Implementation

[0019] In this embodiment, refer to Figures 1-5The roller grinding tool assembly includes a mounting base 1 and a ball bearing 5. A mounting cavity 11 is provided at the front of the mounting base 1. A bearing 4 is mounted in the mounting cavity 11 via a shaft pin 7. A positioning ring 3 is mounted on the bearing 4. The ball bearing 5 is movably mounted at the front end of the mounting base 1 to form a rotatable structure. A portion of the ball bearing 5 protrudes outside the front end of the mounting base 1, and the ball bearing 5 contacts the positioning ring 3 to form a structure that can perform synchronous rotational motion.

[0020] An oil tank 2 is provided on the mounting base 1, and the oil outlet of the oil tank 2 is connected to the ball 5 to deliver lubricating oil to the ball 5.

[0021] The oil tank 2 is installed above the mounting cavity 11, and its oil outlet is located at the bottom of the oil tank 2 to connect with the rolling ball 5. This increases the lubrication between the rolling ball 5 and the workpiece during the rolling process, reduces friction and heat generation, improves surface finish, and ensures dimensional tolerances and surface roughness requirements.

[0022] An oil quantity regulating rod 8 is provided in the oil tank 2. The oil quantity regulating rod 8 is movably inserted into the oil outlet of the oil tank 2 to form a control structure for the oil quantity of the oil outlet.

[0023] The oil outlet has a tapered structure that is wider at the top and narrower at the bottom, and the lower end of the oil volume adjusting rod 8 has a tapered structure that matches the shape of the oil outlet. Lifting the oil volume adjusting rod 8 upwards increases the oil flow, inserting it downwards decreases the oil flow, and inserting it tightly shuts off the oil flow.

[0024] A threaded connector 12 extends forward from the front of the mounting cavity 11. The ball 5 is movably installed in the threaded connector 12 through a pressure cap 6, and the pressure cap 6 is screwed to the threaded connector 12.

[0025] The outer surface of the positioning ring 3 is an arc-shaped groove that matches the rolling ball 5, which is made of steel. The steel ball contacts the positioning ring 3, and the positioning ring 3 drives the bearing 4 to roll, which can reduce resistance.

[0026] Both the pressure cap 6 and the positioning ring 3 are made of leaded brass (tin bronze), which can reduce friction between materials and improve durability. The outer diameter of the workpiece after rolling is highly accurate, the roughness can be improved by two levels, and the surface structure of the outer circle of the workpiece is more dense, which improves the friction resistance and service life of the workpiece.

[0027] During machining, the long shaft is first precision turned on a lathe to the drawing tolerance of approximately +0.02 / +0.01 mm, with a surface roughness of Ra1.6. Then, it is polished with sandpaper to Ra0.8, followed by burnishing using this tool assembly. Lubricating oil is added through oil tank 2 during machining, and the oil flow rate is adjusted by oil level regulator 8. The lathe spindle speed is set to 600 rpm (for a 120 mm outer diameter; the spindle speed should be adjusted appropriately according to the workpiece's outer diameter, with high speeds being the primary focus). A precision turning feed rate of 0.08-0.10 mm / rpm is used, and two burnishing passes are sufficient to meet the requirements.

[0028] In contrast, using the rolling and grinding method of this invention increases lathe processing time by approximately 45 minutes and lathe processing costs by approximately 60 yuan. Each piece can save 140 yuan, and the processing time is reduced from the original 8 hours of outsourcing to 45 minutes, which can greatly improve production efficiency, save processing time, and reduce processing costs.

[0029] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A roller burnishing tool assembly, characterized in that: It includes a mounting base and a ball bearing. A mounting cavity is provided at the front of the mounting base, and a bearing is mounted in the mounting cavity by means of a shaft pin. A positioning ring is mounted on the bearing. The ball bearing is movably mounted at the front end of the mounting base to form a rotatable structure. A portion of the ball bearing protrudes outside the front end of the mounting base, and the ball bearing contacts the positioning ring to form a structure that can perform synchronous rotational motion.

2. The roller burnishing tool assembly according to claim 1, characterized in that: An oil tank is installed on the mounting base, and the oil outlet of the oil tank is connected to the ball bearing to deliver lubricating oil to the ball bearing.

3. The roller burnishing tool assembly according to claim 2, characterized in that: The oil tank is installed above the mounting cavity, and its oil outlet is located at the bottom of the oil tank to connect with the rolling ball.

4. The roller burnishing tool assembly according to claim 1, characterized in that: A fuel quantity regulating rod is installed in the fuel tank, and the fuel quantity regulating rod is movably inserted into the fuel outlet of the fuel tank to form a control structure for the fuel quantity of the fuel outlet.

5. The roller burnishing tool assembly according to claim 4, characterized in that: The oil outlet has a tapered structure that is wider at the top and narrower at the bottom, and the lower end of the oil volume regulating rod has a tapered structure that matches the shape of the oil outlet.

6. The roller burnishing tool assembly according to claim 1, characterized in that: A threaded connector extends forward from the front of the mounting cavity. A ball bearing is movably mounted in the threaded connector via a gland, which is screwed into the threaded connector.

7. The roller burnishing tool assembly according to claim 1, characterized in that: The outer surface of the positioning ring is an arc-shaped groove that matches the rolling ball.

8. The roller burnishing tool assembly according to claim 1, characterized in that: The rolling ball is a steel ball.

9. The roller burnishing tool assembly according to claim 6, characterized in that: Both the pressure cap and the positioning ring are made of leaded brass.

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