A device for opening a lead crack groove on a bearing ring

Abstract

The present invention provides a device for opening a crack induction groove on a bearing ring, and belongs to the technical field of bearing ring processing. The device of the present invention comprises a V-shaped pad, a bowl-shaped pad and a tool. The V-shaped pad and the bowl-shaped pad are fixed as a whole, and the bowl-shaped pad is used to clamp the bearing ring; the angle of the end of the tool is the same as the angle of the crack induction groove; the working angle θ formed by the V-shaped pad on the side with a lower height and the horizontal plane, the crack induction groove direction angle β and the tool inclination angle γ satisfy θ=β-γ. When the device of the present invention is used to open a crack induction groove on a bearing ring, the bearing ring is stuck in the bowl-shaped pad, which is convenient for tool stamping processing, has high processing efficiency, and realizes the opening of the crack induction groove on the bearing ring.

Description

Technical Field

[0001] The invention belongs to the technical field of bearing ring processing, and in particular relates to a device for opening crack grooves in a bearing ring. Background Art

[0002] Bearing products have a large load and need to be filled with steel balls. During the assembly process, the outer ring of the steel balls needs to be slit to facilitate ball loading. Therefore, the bearing rings need to be pre-grooved before heat treatment to facilitate later slits. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a device for forming a crack inducing groove on a bearing ring, so as to realize the formation of the crack inducing groove on the bearing ring.

[0004] The present invention achieves the above technical objectives through the following technical means.

[0005] A device for cutting a crack groove in a bearing ring comprises a V-shaped pad, a bowl-shaped pad and a cutter, wherein the V-shaped pad and the bowl-shaped pad are fixed as a whole;

[0006] The central angle of the V-shaped pad is 90°, and the heights of the two sides of the V-shaped pad are different. The bowl-shaped pad is fixed on the side with the lower height of the V-shaped pad; the V-shaped pad on the side with the lower height forms a working angle θ with the horizontal plane;

[0007] The bowl-shaped spacer is used to clamp the bearing ring;

[0008] The end of the tool is V-shaped, and the tool angle is the same as the angle of the crack induction groove; the end of the tool gradually shrinks upward in the horizontal direction to form a tool inclination angle γ;

[0009] The working angle θ, the crack inducing groove direction angle β and the tool inclination angle γ satisfy the relationship θ=β-γ.

[0010] In the above technical solution, the thickness of the bowl-shaped pad is D, the thickness of the bearing ring is C, and D is larger than C by 1-3 mm.

[0011] In the above technical solution, the radius of the bowl-shaped pad is 0.2-0.4 mm larger than the radius of the bearing ring.

[0012] In the above technical solution, the tool inclination angle γ has a value range of 5-10°.

[0013] The beneficial effects of the present invention are:

[0014] The present invention indirectly ensures the crack inducing groove direction angle β through the working angle θ of the V-shaped pad and the tool inclination angle γ; when processing the tool, the tool angle is made the same as the crack inducing groove angle α, thereby controlling the crack inducing groove angle α; the crack inducing groove depth B is determined by the downward stroke of the tool 4; through the above design, the determination of the crack inducing groove parameters is achieved; when the bearing ring is opened with the device of the present invention, the bearing ring is clamped in the bowl-shaped pad, and the bowl-shaped pad is fixed to the V-shaped pad, which is convenient for tool stamping processing and has high processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram showing the use state of the device for opening crack grooves in a bearing ring according to the present invention;

[0016] Figure 2 This is a schematic diagram of the V-shaped pad structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the bowl-shaped pad structure of the present invention;

[0018] Figure 4 This is a schematic diagram of the tool structure of the present invention. Figure 4 (a) is a front view of the tool of the present invention, Figure 4 (b) is a left side view of the tool of the present invention;

[0019] Figure 5 This is a schematic diagram of the parameters for opening the crack groove in the bearing ring according to the present invention. Figure 5 (a) is a parameter diagram of the crack inducing groove of the bearing ring of the present invention, Figure 5 (b) is a view of the bearing ring of the present invention in the direction of the crack induction groove F;

[0020] In the figure: 1-V-shaped spacer, 2-bowl-shaped spacer, 3-bearing ring, 4-tool, 5-fixed block. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0022] like Figure 1 As shown, a device for opening a cracking groove of a bearing ring of the present invention comprises a V-shaped pad 1, a bowl-shaped pad 2 and a cutter 4. The V-shaped pad 1 and the bowl-shaped pad 2 are fixed as a whole. When the device of the present invention is used to open a cracking groove for a bearing ring 3, the bearing ring 3 is inserted into the bowl-shaped pad 2 ( Figure 3 ), use the tool 4 to open a crack groove on the bearing ring 3. Figure 1In the figure, H is the height of the bowl-shaped pad 2, which is used to ensure that when the tool 4 makes a crack groove on the bearing ring 3, the tool 4 does not contact the V-shaped pad 1 to avoid damage to the V-shaped pad 1; D is the thickness of the bowl-shaped pad 2, and C is the thickness of the bearing ring 3. The thickness D of the bowl-shaped pad 2 is 1-3 mm larger than the thickness C of the bearing ring 3, which is convenient for making a crack groove on the bearing ring 3; in addition, the radius of the bowl-shaped pad 2 is 0.2-0.4 mm larger than the radius of the bearing ring 3, which is convenient for the bearing ring 3 to be stuck into the bowl-shaped pad 2.

[0023] like Figure 2 As shown, the central angle of the V-shaped pad 1 is 90°, and the heights of the two sides of the V-shaped pad 1 are different. A threaded hole is provided on the V-shaped pad 1 on the side with the lower height; the V-shaped pad 1 on the side with the lower height forms a working angle θ with the horizontal plane, and the working angle θ and the crack induction groove direction angle β (see Figure 1 , Figure 5 (a)), tool inclination angle γ (see Figure 1 , Figure 4 (b)) is satisfied as follows: θ = β - γ.

[0024] like Figure 3 As shown, a threaded hole is provided on the fixing block 5 at the bottom end of the bowl-shaped pad 2, and the threaded hole on the fixing block 5 cooperates with the threaded hole on the V-shaped pad 1, and the V-shaped pad 1 and the bowl-shaped pad 2 are fixed by bolts.

[0025] like Figure 4 As shown in (a), the end of the tool 4 is cut into a V shape by wire cutting, and the angle of the tool 4 is α, which is the same as the angle of the crack initiation groove (see Figure 5 (b)), so the crack induction groove angle of the bearing ring 3 is ensured by the tool angle; Figure 4 As shown in (b), during processing, the end of the tool 4 gradually shrinks upward along the horizontal direction to form a tool inclination angle γ, and the value range of γ is 5-10°.

[0026] Figure 5 This is a schematic diagram of the parameters of the crack induction groove of the bearing ring. Figure 5 In (a), A is the position of the crack initiating groove, and B is the depth of the crack initiating groove.

[0027] When the device for forming a crack inducing groove in a bearing ring of the present invention is used, the bearing ring 3 is first inserted into the bowl-shaped pad 2, and the tool 4 is pressed down at the crack inducing groove position A. The crack inducing groove direction angle β is determined by the working angle θ of the V-shaped pad and the tool inclination angle γ, and the crack inducing groove depth B is determined by the pressing stroke of the tool 4; since the tool angle is the same as the crack inducing groove angle, the crack inducing groove angle α is simultaneously determined during the pressing process.

[0028] The embodiments are preferred implementations of the present invention, but the present invention is not limited to the above-mentioned implementations. Any obvious improvements, substitutions or modifications that can be made by those skilled in the art without departing from the essential content of the present invention belong to the protection scope of the present invention.

Claims

1. A device for opening a crack initiation groove on a bearing ring, characterized in that, it includes a V-shaped pad (1), a bowl-shaped pad (2) and a tool (4), and the V-shaped pad (1) and the bowl-shaped pad (2) are fixed together; the central angle of the V-shaped pad (1) is 90°, and the heights on both sides of the V-shaped pad (1) are different. The bowl-shaped pad (2) is fixed on the side surface of the V-shaped pad (1) with a lower height; the V-shaped pad (1) on the side with a lower height forms a working angle θ with the horizontal plane; the bowl-shaped pad (2) is used to hold the bearing ring (3); the end of the tool (4) is V-shaped, and the tool angle is the same as the crack initiation groove angle; the end of the tool (4) gradually contracts upward along the horizontal direction to form a tool inclination angle γ; the relationship satisfied by the working angle θ, the crack initiation groove direction angle β and the tool inclination angle γ is θ = β - γ; the value range of the tool inclination angle γ is 5 - 10°.

2. The device for opening a crack initiation groove on a bearing ring according to claim 1, characterized in that, the thickness of the bowl-shaped pad (2) is D, and the thickness of the bearing ring (3) is C, and D is 1 - 3 mm larger than C.

3. The device for opening a crack initiation groove on a bearing ring according to claim 1, characterized in that, the radius of the bowl-shaped pad (2) is 0.2 - 0.4 mm larger than the radius of the bearing ring (3).

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