A narrow ring thin wall large outer ring centerless grinding method

Abstract

The present application relates to a kind of narrow ring thin-walled large outer ring centerless grinding method, centerless grinding machine is opened, operator is from standing at the feed inlet outside of centerless grinding machine, first put in a tool ring, then take a certain amount of large outer ring and put into feed inlet, and push forward, immediately take a tool ring and put into feed inlet, then push in, then take a certain amount of large outer ring and put into feed inlet, so repeat the operation;The outer diameter of tool ring is smaller than the outer diameter of large outer ring by 0.5mm;The ratio of the outer diameter of large outer ring and the axial thickness of large outer ring is greater than 7:1.The advantage is to clamp a tool ring between a certain amount of large outer ring, the width of tool ring is relatively wide, the outer circle is slightly smaller than the outer circle of workpiece large outer ring, and the wall of tool ring is thin;When grinding, the narrow ring of large outer ring is perpendicular to the tool plate of centerless grinding machine, and will not be deflected due to uneven thrust, so the outer peripheral surface of ground large outer ring will not have taper;Using this method to grind narrow ring thin-walled large circular workpiece on centerless grinding machine can ensure quality and efficiency.

Description

Technical Field

[0001] This invention relates to the field of bearing processing, and specifically to a method for centerless grinding of narrow-ring, thin-walled, large outer rings. Background Technology

[0002] Centerless grinding machines, typically referring to centerless cylindrical grinding machines, work by grinding the rotating surface of a workpiece through the interaction of a grinding wheel and a guide wheel. The workpiece does not require centering or support; instead, it is placed directly between the grinding wheel and the guide wheel for grinding. This design gives it a significant advantage in productivity, especially in high-volume production environments.

[0003] Previously, the large outer rings with narrow diameters and thin walls, and small heights, could not meet the required quality when directly ground on a centerless grinder. When using a centerless grinder, the large outer rings were placed one by one into the grinder. Due to their large size, narrowness, and thin walls, the pushing force of the large outer rings was easily uneven, causing them to tilt against the cutter plate. This resulted in a taper on the outer circumference of the large outer rings, which did not meet the standards. Therefore, the outer rings had to be ground one by one using a centering grinder, which was inefficient. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention proposes a centerless grinding method for narrow-ring, thin-walled, large outer rings. The method is ingenious and the process is well-developed. The use of a self-made tooling ring can assist in the effective machining of narrow-ring, thin-walled, large outer rings on a centerless grinder, resulting in high machining accuracy and improved efficiency.

[0005] The technical solution of this invention: A method for centerless grinding of a narrow, thin-walled outer ring, comprising the following steps: Step 1: Send the outer ring to be ground into the temporary storage compartment on one side of the centerless grinder, and at the same time place the tooling ring for auxiliary grinding on the side close to the temporary storage compartment. Step 2: Start the centerless grinder. The operator stands outside the feed inlet of the centerless grinder, first takes out a tooling ring and puts it into the feed inlet, then takes out a certain number of large outer rings and puts them into the feed inlet, and pushes them forward. Then take out another tooling ring and a certain number of large outer rings and put them into the feed inlet. Repeat this process. Step 3: On the outside of the discharge port of the centerless grinder, another worker takes out a certain number of large outer rings and tooling rings in sequence and puts them into the designated storage bin. Step 4: The tooling ring is reused and sent back to the feed inlet side for reuse; The outer diameter of the tooling ring is 0.5 mm smaller than the outer diameter of the large outer ring; the ratio of the outer diameter of the large outer ring to the axial thickness of the large outer ring is greater than 7:1.

[0006] The outer ring is a ring with a narrow axial thickness, thin wall thickness, and a large inner diameter.

[0007] The centerless grinder includes a grinding wheel, a rubber guide wheel, and a cutter plate. There is a certain gap between the grinding wheel and the rubber guide wheel. A cutter plate is installed at the lower end of the gap. The upper surface of the cutter plate is designed as a downward inclined surface near the rubber guide wheel. A certain number of large outer rings stand on the inclined surface of the cutter plate, and a tooling ring is placed in the middle of the large outer rings.

[0008] The specified number of large outer rings is 5-6.

[0009] An avoidance groove is provided in the middle of the outer side of the tooling ring.

[0010] The machining axial centerline of the large outer ring is higher than the axial centerlines of the grinding wheel and the rubber guide wheel.

[0011] The minimum axial thickness of the tooling ring is 45 mm.

[0012] The axial width of the annular groove is 40 mm.

[0013] The advantage of this invention is that a tooling ring is clamped between a certain number of large outer rings. The tooling ring is relatively wide, its outer circle is slightly smaller than that of the large outer ring of the workpiece, and its wall is relatively thin. During grinding, the narrow ring of the large outer ring is perpendicular to the cutting edge of the centerless grinder, so it will not be skewed due to uneven thrust, and the outer circumference of the ground large outer ring will not have a taper. Using this method to grind workpieces with narrow rings, thin walls, and large outer circles on a centerless grinder ensures quality and high efficiency. Attached Figure Description

[0014] Figure 1 This is a top view of the present invention.

[0015] Figure 2 This is a front view schematic diagram of the present invention.

[0016] Figure 3 This is a schematic diagram of the tooling ring of the present invention.

[0017] Figure 4 This is a schematic diagram of the product according to Embodiment 1 of the present invention.

[0018] Figure 5 This is a schematic diagram of the product in Embodiment 2 of the present invention. Detailed Implementation

[0019] See attached document Figure 1-3 A method for centerless grinding of a narrow-ring, thin-walled, large outer ring, the specific steps of which are as follows: Step 1: Send the outer ring 1 to be ground into the temporary storage compartment on one side of the centerless grinder 3, and at the same time place the tooling ring 2 for auxiliary grinding on the side close to the temporary storage compartment. Step 2: The centerless grinder 3 is turned on. The operator stands outside the feed inlet of the centerless grinder 3, first takes out a tooling ring 2 and puts it into the feed inlet, then takes out a certain number of large outer rings 1 and puts them into the feed inlet, and pushes them forward. Then, take out another tooling ring 2 and a certain number of large outer rings 1 and put them into the feed inlet. Repeat this process. Step 3: On the outside of the discharge port of the centerless grinder 3, another worker takes out a certain number of large outer rings 1 and tooling rings 2 in sequence and puts them into the designated storage bin. Step 4: Tooling ring 2 is reused and sent back to the feed inlet side for reuse; The outer diameter of the tooling ring 2 is 0.5 mm smaller than the outer diameter of the large outer ring 1; the ratio of the outer diameter of the large outer ring 1 to the axial thickness of the large outer ring 1 is greater than 7:1.

[0020] The outer ring 1 is a ring with a narrow axial thickness, thin wall thickness, and large inner diameter.

[0021] The centerless grinder 3 includes a grinding wheel 31, a rubber guide wheel 32, and a cutting edge 33. A certain gap exists between the grinding wheel 31 and the rubber guide wheel 32. The cutting edge 33 is installed at the lower end of the gap. The upper surface of the cutting edge 33 is designed as a downward-sloping surface near the rubber guide wheel 32. A certain number of large outer rings 1 stand on the slope of the cutting edge 33, and a tooling ring 2 is supported in the middle of each large outer ring 1. The inclination angle of the upper surface of the cutting edge is between 30 and 45 degrees, adjustable according to actual grinding needs.

[0022] The specified number of large outer rings 1 is 5-6. This number design ensures effective transmission of thrust between adjacent large outer rings, effective vertical correction of the large outer rings, and prevention of tilting. The tooling ring is used for effective correction and transmission of intermediate force. Without the tooling ring, the thrust after 5-6 large outer rings cannot be effectively transmitted, and it is easy to tilt. The tooling ring design of this invention effectively solves this problem.

[0023] The machining axial centerline of the large outer ring 1 is higher than the axial centerlines of the grinding wheel 31 and the rubber guide wheel 32.

[0024] An avoidance groove 21 is provided in the middle of the outer side of the tooling ring 2.

[0025] The minimum axial thickness of the tooling ring 2 is 45mm. The axial width of the ring groove 21 is 40mm. The inner diameter of the tooling ring can be the same as the inner diameter of the large outer ring. The wall thickness of the tooling ring is slightly thinner than that of the large outer ring. During grinding, it will not be ground, and it can effectively transmit thrust. This ensures that a certain number of large outer rings are ground perpendicular to the cutting tool, thereby ensuring high machining accuracy, no taper, and high machining efficiency when using a centerless grinder.

[0026] like Figure 4Example 1: The outer axial thickness of the product's outer ring is 10mm, the outer diameter of the outer ring is 166mm, and the inner diameter is 156mm. The tooling ring has an axial thickness of 45mm, an outer diameter of 165.5mm, and an inner diameter of 156mm.

[0027] like Figure 5 Example 2: The outer axial thickness of the product's outer ring is 17mm, the outer diameter of the outer ring is 165mm, and the inner diameter is 156mm. The tooling ring has an axial thickness of 45mm, an outer diameter of 164.5mm, and an inner diameter of 156mm.

[0028] Examples 1 and 2 show that the tooling rings were processed using the method of this invention, resulting in stable product quality, 100% qualified products, and batch grinding, which improves production efficiency.

Claims

1. A method for centerless grinding of a narrow-ring, thin-walled, large outer ring, characterized in that, The specific steps are as follows: Step 1: Send the outer ring to be ground into the temporary storage compartment on one side of the centerless grinder, and at the same time place the tooling ring for auxiliary grinding on the side close to the temporary storage compartment. Step 2: Start the centerless grinder. The operator stands outside the feed inlet of the centerless grinder, first takes out a tooling ring and puts it into the feed inlet, then takes out a certain number of large outer rings and puts them into the feed inlet, and pushes them forward. Then take out another tooling ring and a certain number of large outer rings and put them into the feed inlet. Repeat this process. Step 3: On the outside of the discharge port of the centerless grinder, another worker takes out a certain number of large outer rings and tooling rings in sequence and puts them into the designated storage bin. Step 4: The tooling ring is reused and sent back to the feed inlet side for reuse; The outer diameter of the tooling ring is 0.5 mm smaller than that of the large outer ring; the ratio of the outer diameter to the axial thickness of the large outer ring is greater than 7:1; the large outer ring is a ring with narrow axial thickness, thin wall thickness, and large inner diameter; the centerless grinder includes a grinding wheel, a rubber guide wheel, and a cutter plate, with a certain gap between the grinding wheel and the rubber guide wheel, and a cutter plate installed at the lower end of the gap. The upper surface of the cutter plate is designed as a downward inclined surface near the rubber guide wheel. A certain number of large outer rings stand on the inclined surface of the cutter plate, and a tooling ring is supported in the middle of the large outer ring; the certain number of large outer rings is 5-6; a clearance groove is provided in the middle of the outer side of the tooling ring; the machining axial center line of the large outer ring is higher than the axial center line of the grinding wheel and the rubber guide wheel; the minimum axial thickness of the tooling ring is 45 mm; the axial width of the groove is 40 mm.

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