Centerless grinding method for narrow-ring thin-wall large outer ring

Abstract

The invention relates to a narrow-ring thin-wall large outer ring centerless grinding method which comprises the following steps: starting a centerless grinding machine, firstly putting a tool ring into the centerless grinding machine from the outer side of a feed port of the centerless grinding machine by an operator, then taking out a certain number of large outer rings, putting the large outer rings into the feed port, pushing the large outer rings forwards, then taking a tool ring into the feed port, and pushing the large outer rings inwards; then a certain amount of large outer rings are taken and put into the feeding opening, and the operation is repeated; the outer diameter of the tool ring is 0.5 mm smaller than that 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 larger than 7: 1. The tool ring has the advantages that the tool ring is clamped between a certain amount of large outer rings, the tool ring is wide, the outer circle of the tool ring is slightly smaller than the outer ring of the large outer ring of a workpiece, and the wall of the tool ring is thin; during grinding, the narrow ring of the large outer ring is perpendicular to a cutting board of the centerless grinding machine and cannot deflect due to non-uniform thrust, and the outer peripheral surface of the ground large outer ring cannot have taper; the method is used for grinding the narrow-ring thin-wall large-outer-circle workpiece on the centerless grinding machine, the quality is guaranteed, and the efficiency is high.

Description

Technical Field

[0001] The invention relates to the field of bearing processing, and in particular to a centerless grinding method for a narrow ring, thin-walled large outer ring. Background Art

[0002] Centerless grinding machines usually refer to centerless cylindrical grinding machines. Their working principle is to grind the rotating surface of the workpiece through the interaction between the grinding wheel and the guide wheel. The workpiece does not need to be centered and supported, but is directly placed between the grinding wheel and the guide wheel for grinding. The design of this type of grinding machine gives it a clear advantage in productivity, especially in a mass production environment.

[0003] In the past, narrow rings, thin walls, and large outer rings had large outer circles and small heights, and the quality could not meet the requirements directly on the centerless grinder. When centerless grinding was used, the large outer rings were placed one by one on the grinder. Due to the large, narrow, and thin-walled rings, when the operator pushed the large outer rings, the thrust was easily uneven, and it was easy to tilt with the blade, causing the outer circumference of the large outer ring to be ground into a taper, which could not meet the standards. The only way was to grind the outer circles one by one with a center, which was inefficient. Summary of the invention

[0004] In order to solve the above technical problems, the present invention proposes a method for centerless grinding of narrow-ring, thin-walled large outer rings. The method is ingenious and the process is perfect. The use of a homemade tooling ring can assist in the effective processing of narrow-ring, thin-walled large outer rings on a centerless grinder, with high processing accuracy and improved efficiency.

[0005] The technical solution of the present invention: A method for centerless grinding of a narrow ring, thin wall and large outer ring, the specific steps are as follows: Step 1: Send the large outer ring to be ground to a temporary storage bin on one side of the centerless grinder, and place the auxiliary grinding tooling ring close to the temporary storage bin; Step 2: The centerless grinder is turned on. The operator stands outside the feed port of the centerless grinder, first takes out a tooling ring and puts it into the feed port, then takes out a certain number of large outer rings and puts them into the feed port, and pushes them forward, then takes out another tooling ring and a certain number of large outer rings and puts them into the feed port, and repeats the process alternately. Step 3: Outside the outlet of the centerless grinder, another worker takes out a certain number of large outer rings and tooling rings in turn and puts them into the designated storage bin; Step 4, the tooling ring is reused and sent back to the side of the feed inlet 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 large outer ring is a ring with a narrow axial thickness, a thin wall thickness and a large inner diameter.

[0007] The centerless grinder includes a grinding wheel, a rubber guide wheel, and a knife plate. A certain gap is left between the grinding wheel and the rubber guide wheel. A knife plate is installed at the lower end of the gap. The upper end surface of the knife plate is designed to be a downward inclined surface close to the rubber guide wheel. A certain number of large outer rings stand on the inclined surface of the knife plate and a tooling ring is placed on the middle support of the large outer ring.

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

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

[0010] The machining axial center line of the large outer ring is higher than the axial center lines 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 advantages of the present invention are that a tooling ring is clamped between a certain amount of large outer rings, the tooling ring is relatively wide, the outer circle is slightly smaller than the outer circle of the large outer ring of the workpiece, and the wall is relatively thin; when grinding, the narrow circle of the large outer ring is made perpendicular to the knife plate of the centerless grinder, and will not be deflected due to uneven thrust, and the outer peripheral surface of the ground large outer ring will not have taper; using this method to grind a narrow circle, thin wall and large outer circle workpiece on a centerless grinder ensures quality and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a top view schematic diagram of the present invention.

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

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

[0017] Figure 4 It is a product schematic diagram of embodiment 1 of the present invention.

[0018] Figure 5 It is a product schematic diagram of embodiment 2 of the present invention. DETAILED DESCRIPTION

[0019] See attached Figure 1-3 , a method for centerless grinding of narrow ring, thin wall and large outer ring, the specific steps are as follows: Step 1: Send the large outer ring 1 to be ground to a temporary storage bin on one side of the centerless grinder 3, and at the same time place the auxiliary grinding tooling ring 2 near the temporary storage bin; Step 2: The centerless grinder 3 is turned on. The operator stands outside the feed port of the centerless grinder 3, first takes out a tooling ring 2 and puts it into the feed port, then takes out a certain number of large outer rings 1 and puts them into the feed port, and pushes them forward, then takes out another tooling ring 2 and a certain number of large outer rings 1 and puts them into the feed port, and repeats the process alternately. Step 3: On the outside of the discharge port of the centerless grinder 3, another staff member takes out a certain number of large outer rings 1 and tooling rings 2 in sequence and puts them into a designated storage bin; Step 4, the tooling ring 2 is reused and sent back to the side of the feed inlet 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 large outer ring 1 is a ring with a narrow axial thickness, a thin wall thickness and a large inner diameter.

[0021] The centerless grinder 3 includes a grinding wheel 31, a rubber guide wheel 32, and a knife plate 33. A certain gap is left between the grinding wheel 31 and the rubber guide wheel 32. The knife plate 33 is installed at the lower end of the gap. The upper end surface of the knife plate 33 is designed to be a sloped surface inclined downward near the rubber guide wheel 32. A certain number of large outer rings 1 stand on the slope of the knife plate 33 and a tooling ring 2 is placed in the middle support of the large outer ring 1. The inclination of the upper end surface of the knife plate is between 30-45 degrees, which is adjusted according to actual grinding needs.

[0022] The certain number of large outer rings 1 is 5-6. This number design can ensure that the adjacent large outer rings effectively transmit thrust, effectively correct the large outer rings vertically, and prevent tilting. The tooling ring effectively corrects and transmits the 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 the present invention effectively solves this problem.

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

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

[0025] The minimum axial thickness of the tooling ring 2 is 45 mm. The axial width of the ring groove 21 is 40 mm. The inner diameter of the tooling ring can be designed to 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 the thrust can be effectively transmitted to ensure that a certain number of large outer rings are ground perpendicular to the blade, thereby ensuring high processing accuracy, no taper, and high processing efficiency using a centerless grinder.

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

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

[0028] In Examples 1 and 2, the tooling rings were processed by the method of the present invention, and the product quality was stable, 100% qualified, and grinding was carried out in batches to improve production efficiency.

Claims

1. A method for centerless grinding of narrow, thin-walled, large outer rings, characterized in that: The specific steps are as follows: Step 1: Send the large outer ring to be ground to a temporary storage bin on one side of the centerless grinder, and place the auxiliary grinding tooling ring close to the temporary storage bin; Step 2: The centerless grinder is turned on. The operator stands outside the feed port of the centerless grinder, first takes out a tooling ring and puts it into the feed port, then takes out a certain number of large outer rings and puts them into the feed port, and pushes them forward, then takes out another tooling ring and a certain number of large outer rings and puts them into the feed port, and repeats the process alternately. Step 3: Outside the outlet of the centerless grinder, another worker takes out a certain number of large outer rings and tooling rings in turn and puts them into the designated storage bin; Step 4, the tooling ring is reused and sent back to the side of the feed inlet 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.

2. A method for centerless grinding of narrow, thin-walled, large outer rings according to claim 1, characterized in that: The large outer ring is a ring with a narrow axial thickness, a thin wall thickness and a large inner diameter.

3. The method for centerless grinding of narrow, thin-walled, large outer rings according to claim 1, characterized in that: The centerless grinder includes a grinding wheel, a rubber guide wheel, and a knife plate. A certain gap is left between the grinding wheel and the rubber guide wheel. A knife plate is installed at the lower end of the gap. The upper end surface of the knife plate is designed to be a downward inclined surface close to the rubber guide wheel. A certain number of large outer rings stand on the inclined surface of the knife plate and a tooling ring is placed on the middle support of the large outer ring.

4. A method for centerless grinding of narrow, thin-walled, large outer rings according to claim 1, characterized in that: The certain number of large outer rings is 5-6.

5. A method for centerless grinding of narrow, thin-walled, large outer rings according to claim 1 or 3, characterized in that: An avoidance ring groove is arranged in the middle of the outer side of the tooling ring.

6. A method for centerless grinding of narrow, thin-walled, large outer rings according to claim 3, characterized in that: The machining axial center line of the large outer ring is higher than the axial center lines of the grinding wheel and the rubber guide wheel.

7. A method for centerless grinding of narrow, thin-walled, large outer rings according to claim 5, characterized in that: The minimum axial thickness of the tooling ring is 45 mm.

8. A method for centerless grinding of narrow, thin-walled, large outer rings according to claim 7, characterized in that: The axial width of the annular groove is 40 mm.

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