Superfinishing scratch-proof device for inner ring of stainless steel bearing

Abstract

A stainless steel bearing inner ring super-finishing scratch-proof device comprises an inner ring product, an end face support, a rotating main shaft, an end face support fastening bolt, a super-finishing stone, a super-finishing head and a super-finishing pressing wheel mechanism. The inner ring product comprises a rolling surface, and the lower end of the ultra-fine oil stone abuts against the rolling surface of the inner ring product. The device further comprises a super-precision centering bearing, a centering bearing compression bolt and a gasket. A cylindrical raised head is arranged at the front end of the superfinishing head, and the superfinishing centering bearing is arranged on the cylindrical raised head in a sleeving manner; the inner side of the inner ring of the superfinishing centering bearing is tightly matched with the outer side surface of the cylindrical raised head, and the outer side of the outer ring of the superfinishing centering bearing is tightly matched with the inner side surface of the inner ring product; the gasket is pressed on the inner ring of the super-precision centering bearing, and the diameter of the gasket is smaller than the outer diameter of the inner ring of the super-precision centering bearing; the fixed core bearing compression bolt penetrates through a central hole of the gasket and is screwed into the front end of the cylindrical raised head; and the centering bearing compression bolt is used for pressing the super-precision centering bearing through the gasket. The utility model has the beneficial effects that the inner diameter of the bearing is not scratched, and the durability of the fixed core shaft is high.

Description

Technical Field

[0001] The utility model discloses a bearing inner ring super-finishing anti-scratch device, in particular to a stainless steel bearing inner ring super-finishing anti-scratch device, belonging to the technical field of bearing ring processing. Background Art

[0002] Stainless steel bearings are corrosion-resistant and anti-oxidation, and are widely used in various industries of the national economy. Stainless steel materials have a common processing difficulty, which is high toughness and difficult to process. When superfinishing high-toughness materials such as stainless steel, it is necessary to increase the superfinishing pressure and extend the superfinishing time. This method will cause the superfinishing bearing surface to scratch the bearing surface. After the outer diameter of the outer sleeve is scratched, there is a grinding process for the outer diameter, and the scratch on the outer diameter can be eliminated. If the inner diameter of the inner ring is scratched, it can only be scrapped.

[0003] At present, the bearing super-precision centering shaft is mostly made of carbide or ceramic materials, which can easily cause scratches on the inner diameter of the bearing, and the centering shaft has low durability and needs to be repaired or replaced. At present, the industry uses hydraulic centering to form an oil film on site between the inner wall of the inner ring of the bearing and the centering shaft when super-finishing high-end bearings, thereby preventing scratches on the inner diameter; however, this method requires a set of hydraulic systems with excellent filtration and strict requirements on the consistency of the inner diameter size of the bearing. It is suitable for high-precision, high-value-added stainless steel bearings, but it is not cost-effective for conventional stainless steel bearings. Utility Model Content

[0004] The purpose of the utility model is to provide a stainless steel bearing inner ring superfinishing anti-scratch device to address the defects in the above-mentioned existing stainless steel bearing inner ring superfinishing equipment technology, which easily causes scratches on the inner diameter of the bearing, and the durability of the fixed core shaft is also very low, or the processing cost is too high. The utility model can achieve the purpose of no scratches on the inner diameter of the bearing, high durability of the fixed core shaft, and low processing cost.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a super-finishing anti-scratch device for the inner ring of a stainless steel bearing, comprising an inner ring product, an end face support, a rotating spindle, an end face support fastening bolt, a super-finishing oilstone, a super-finishing head and a super-finishing pressing wheel mechanism; the inner ring product comprises a rolling surface, the end face support is arranged on one side of the inner ring product, and the end face support is tightly connected to the inner ring product; the rotating spindle is arranged on the outer side of the end face support, and the end face support is tightly connected to the rotating spindle through the end face support fastening bolt; the super-finishing oilstone is fixedly mounted above the inner ring product, and the lower end of the super-finishing oilstone conflicts with the rolling surface of the inner ring product; the super-finishing head is fixedly mounted on the other side of the inner ring product, and the super-finishing pressing wheel mechanism is fixedly mounted on the super-finishing head;

[0006] It also includes an ultra-precision fixed core bearing, a fixed core bearing clamping bolt and a gasket; a cylindrical protrusion is arranged at the front end of the ultra-precision head, and the ultra-precision fixed core bearing is sleeved on the cylindrical protrusion and is located between the cylindrical protrusion and the inner ring product; the inner side of the inner ring of the ultra-precision fixed core bearing is tightly matched with the outer side of the cylindrical protrusion, the outer diameter of the ultra-precision fixed core bearing is 29.90-29.95mm, and the outer side of the outer ring of the ultra-precision fixed core bearing is tightly matched with the inner side of the inner ring product;

[0007] The gasket is pressed on the inner ring of the super-precision fixed core bearing, and the diameter of the gasket is smaller than the outer diameter of the inner ring of the super-precision fixed core bearing; the fixing bearing clamping bolt passes through the center hole of the gasket and is screwed into the front end of the cylindrical protrusion; the fixing bearing clamping bolt presses the super-precision fixed core bearing through the gasket, so that the super-precision fixed core bearing is fixed between the cylindrical protrusion and the inner ring product;

[0008] When the main shaft rotates, the inner ring product and the outer ring of the super-precision fixed core bearing are driven to rotate together through the end face support. At this time, the rolling surface of the inner ring product is finely ground under the action of the super-precision oilstone.

[0009] The side of the end face support close to the inner ring product is cylindrical, and the cylindrical end face of the end face support matches the size of the end face of the inner ring product.

[0010] The shape of the lower end of the super-fine oil stone matches the rolling surface of the inner ring product.

[0011] A pressure wheel shaft hole is arranged on the super-precision head; the super-precision pressure wheel mechanism comprises a super-precision pressure wheel shaft, two super-precision bearing pressure wheels and two pressure wheel fastening bolts; the super-precision pressure wheel shaft is passed through the pressure wheel shaft hole; the two super-precision bearing pressure wheels are respectively fixed at both ends of the super-precision pressure wheel shaft by pressure wheel fastening bolts, and the two super-precision bearing pressure wheels press the inner ring product from the side.

[0012] It also includes a pressure wheel shaft clamping bolt, which is arranged on one side of the super-precision pressure wheel shaft. When the pressure wheel shaft clamping bolt is tightened, the super-precision pressure wheel shaft no longer rotates.

[0013] The model of the inner ring product is stainless steel bearing 61806, and the inner diameter ring width of the inner ring product is 7mm.

[0014] The product model of the super precision core bearing is 61903-2RS or 61903-2Z, and the outer diameter of the super precision core bearing is 30mm; or the model is 6101-2RS or 61901-2Z, and a bearing steel hardened ring is bonded to the outer sleeve of the bearing with epoxy resin, and the grinding value is required to meet the super precision machining requirements.

[0015] In order to facilitate loading and unloading of superfinishing, the outer diameter of the standard superfinishing centering bearing used as the centering will be ground so that the outer diameter size is 0.05-0.10mm smaller than the size of the inner ring product to be superfinished; when the outer diameter size of the centering bearing is significantly different from the size of the inner ring of the bearing to be superfinished, a hardened steel ring can be embedded in the outer sleeve of the centering bearing, which also achieves the purpose of not damaging the inner diameter of the bearing.

[0016] Compared with the prior art, the utility model has the beneficial effects of providing a stainless steel bearing inner ring superfinishing centering device, which replaces the existing cemented carbide or ceramic materials, effectively prevents the inner diameter of the inner ring from being scratched during superfinishing, greatly reduces the waste generated by inner diameter scratches during the stainless steel bearing superfinishing process, and at the same time maintains a longer service life of the centering shaft, reducing processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is: the schematic front cross-sectional view of the structure of the utility model;

[0018] Figure 2 It is: a schematic top view of the structure of the utility model;

[0019] Figure 3 The figure is a schematic top view (partial cutaway view) of the structure of the utility model.

[0020] Explanation of the accompanying drawings: end face support 1, rotating spindle 2, end face support fastening bolt 3, super precision oilstone 4, super precision head 5, cylindrical boss 501, super precision pressing wheel mechanism 6, super precision pressing wheel shaft 601, super precision bearing pressing wheel 602, pressing wheel fastening bolt 603, super precision centering bearing 7, centering bearing clamping bolt 8, gasket 9, pressing wheel shaft hole 10, pressing wheel shaft clamping bolt 11, inner ring product 12, rolling surface 1201. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1-Figure 3As shown, a stainless steel bearing inner ring super-finishing anti-scratch device comprises an inner ring product 12, an end face support 1, a rotating spindle 2, an end face support fastening bolt 3, a super-finishing oilstone 4, a super-finishing head 5 and a super-finishing pressing wheel mechanism 6; the inner ring product 12 comprises a rolling surface 1201, the end face support 1 is arranged on one side of the inner ring product 12, and the end face support 1 is pressed and connected with the inner ring product 12; the rotating spindle 2 is arranged on the outer side of the end face support 1, and the end face support 1 is fastened and connected with the rotating spindle 2 through the end face support fastening bolt 3; the super-finishing oilstone 4 is fixedly mounted (not shown in the figure) above the inner ring product 12, and the lower end of the super-finishing oilstone 4 is in conflict with the rolling surface 1201 of the inner ring product 12; the super-finishing head 5 fixed frame (not shown in the figure) is arranged on the other side of the inner ring product 12, and the super-finishing pressing wheel mechanism 6 is fixedly mounted on the super-finishing head 5;

[0023] It also includes an ultra-precision core bearing 7, a core bearing clamping bolt 8 and a gasket 9; a cylindrical protrusion 501 is provided at the front end of the ultra-precision head 5, and the ultra-precision core bearing 7 is sleeved on the cylindrical protrusion 501 and is located between the cylindrical protrusion 501 and the inner ring product 12; the inner side of the inner ring of the ultra-precision core bearing 7 is tightly matched with the outer side of the cylindrical protrusion 501, the outer diameter of the ultra-precision core bearing 7 is 29.90-29.95mm, and the outer side of the outer ring of the ultra-precision core bearing 7 is tightly matched with the inner side of the inner ring product 12;

[0024] The gasket 9 is pressed on the inner ring of the super-precision fixed core bearing 7, and the diameter of the gasket 9 is smaller than the outer diameter of the inner ring of the super-precision fixed core bearing 7; the fixed core bearing clamping bolt 8 passes through the center hole of the gasket 9 and is screwed into the front end of the cylindrical protrusion 501; the fixed core bearing clamping bolt 8 presses the super-precision fixed core bearing 7 through the gasket 9, so that the super-precision fixed core bearing 7 is fixed between the cylindrical protrusion 501 and the inner ring product 12;

[0025] When the rotating main shaft 2 rotates, the inner ring product 12 and the outer ring of the super-precision fixed core bearing 7 are driven to rotate together through the end face support 1. At this time, the rolling surface 1201 of the inner ring product 12 is finely ground under the action of the super-precision oilstone 4.

[0026] The side of the end face support 1 close to the inner ring product 12 is cylindrical, and the cylindrical end face of the end face support 1 matches the end face of the inner ring product 12 in size.

[0027] The shape of the lower end of the super-fine oil stone 4 matches the rolling surface 1201 of the inner ring product 12.

[0028] The super-precision head 5 is provided with a pressure wheel shaft hole 10; the super-precision pressure wheel mechanism 6 includes a super-precision pressure wheel shaft 601, two super-precision bearing pressure wheels 602 and two pressure wheel fastening bolts 603, the super-precision pressure wheel shaft 601 is passed through the pressure wheel shaft hole 10, and the two super-precision bearing pressure wheels 602 are respectively fixed at both ends of the super-precision pressure wheel shaft 601 by pressure wheel fastening bolts 603, and the two super-precision bearing pressure wheels 602 press the inner ring product 12 from the side.

[0029] It also includes a pressure wheel shaft clamping bolt 11, which is arranged on one side of the super-precision pressure wheel shaft 601. When the pressure wheel shaft clamping bolt 11 is tightened, the super-precision pressure wheel shaft 601 no longer rotates.

[0030] The model of the inner ring product 12 is stainless steel bearing 61806, and the inner diameter ring width of the inner ring product 12 is 7 mm.

[0031] The product model of the super precision centering bearing 7 is 61903-2RS, and the outer diameter of the super precision centering bearing 7 is 30 mm.

[0032] In order to facilitate the loading and unloading of superfinishing, the outer diameter of the standard superfinishing centering bearing 7 used as the centering is ground so that the outer diameter size is 0.05-0.10mm smaller than the size of the inner ring product 12 to be superfinished; when the outer diameter size of the centering bearing is significantly different from the size of the inner ring of the bearing to be superfinished, a hardened steel ring can be embedded in the outer sleeve of the centering bearing, which also achieves the purpose of not damaging the inner diameter of the bearing.

[0033] The embodiments described above are only preferred implementations of the present invention. Common changes and substitutions made by those skilled in the art within the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A super-finishing anti-scratch device for the inner ring of a stainless steel bearing, comprising an inner ring product, an end face support, a rotating spindle, an end face support fastening bolt, a super-finishing oilstone, a super-finishing head and a super-finishing pressing wheel mechanism; the inner ring product comprises a rolling surface, the end face support is arranged on one side of the inner ring product, and the end face support is tightly connected to the inner ring product; the rotating spindle is arranged on the outer side of the end face support, and the end face support is tightly connected to the rotating spindle through the end face support fastening bolt; the super-finishing oilstone is fixedly mounted above the inner ring product, and the lower end of the super-finishing oilstone conflicts with the rolling surface of the inner ring product; the super-finishing head is fixedly mounted on the other side of the inner ring product, and the super-finishing pressing wheel mechanism is fixedly mounted on the super-finishing head, characterized in that: It also includes an ultra-precision fixed core bearing, a fixed core bearing clamping bolt and a gasket; a cylindrical protrusion is arranged at the front end of the ultra-precision head, and the ultra-precision fixed core bearing is sleeved on the cylindrical protrusion and is located between the cylindrical protrusion and the inner ring product; the inner side of the inner ring of the ultra-precision fixed core bearing is tightly matched with the outer side of the cylindrical protrusion, the outer diameter of the ultra-precision fixed core bearing is 29.90-29.95mm, and the outer side of the outer ring of the ultra-precision fixed core bearing is tightly matched with the inner side of the inner ring product; The gasket is pressed onto the inner ring of the super-precision fixed core bearing, and the diameter of the gasket is smaller than the outer diameter of the inner ring of the super-precision fixed core bearing; the fixing bearing clamping bolt passes through the center hole of the gasket and is screwed into the front end of the cylindrical boss; the fixing bearing clamping bolt presses the super-precision fixed core bearing through the gasket, so that the super-precision fixed core bearing is fixed between the cylindrical boss and the inner ring product.

2. The device for preventing the inner ring of a stainless steel bearing from being scratched by ultra-precision according to claim 1, characterized in that: The side of the end face support close to the inner ring product is cylindrical, and the cylindrical end face of the end face support matches the size of the end face of the inner ring product.

3. The device for preventing the inner ring of a stainless steel bearing from being scratched by ultra-precision according to claim 1, characterized in that: The shape of the lower end of the super-fine oil stone matches the rolling surface of the inner ring product.

4. The device for preventing the inner ring of a stainless steel bearing from being scratched by ultra-precision according to claim 1, characterized in that: A pressure wheel shaft hole is arranged on the super-precision head; the super-precision pressure wheel mechanism comprises a super-precision pressure wheel shaft, two super-precision bearing pressure wheels and two pressure wheel fastening bolts; the super-precision pressure wheel shaft is passed through the pressure wheel shaft hole; the two super-precision bearing pressure wheels are respectively fixed at both ends of the super-precision pressure wheel shaft by pressure wheel fastening bolts, and the two super-precision bearing pressure wheels press the inner ring product from the side.

5. The device for preventing the inner ring of a stainless steel bearing from being scratched by ultra-precision according to claim 4, characterized in that: It also includes a pressure wheel shaft clamping bolt, which is arranged on one side of the super-precision pressure wheel shaft. When the pressure wheel shaft clamping bolt is tightened, the super-precision pressure wheel shaft no longer rotates.

6. The device for preventing the inner ring of a stainless steel bearing from being scratched by ultra-precision according to claim 1, characterized in that: The model of the inner ring product is stainless steel bearing 61806, and the inner diameter ring width of the inner ring product is 7mm.

7. The device for preventing the inner ring of a stainless steel bearing from being scratched by ultra-precision according to claim 1, characterized in that: The product model of the super precision core bearing is 61903-2RS or 61903-2Z, and the outer diameter of the super precision core bearing is 30mm; or the model is 6101-2RS or 61901-2Z, and a bearing steel hardened ring is bonded to the outer sleeve of the bearing with epoxy resin, and the grinding value is required.

8. The device for preventing the inner ring of a stainless steel bearing from being scratched by ultra-precision according to claim 1, characterized in that: During super finishing, the outer diameter of the standard super finishing centering bearing used as the centering is ground to make the outer diameter 0.05-0.10mm smaller than the inner ring size of the bearing to be super finished. When the outer diameter of the centering bearing is significantly different from the inner ring size of the bearing to be super finished, a hardened steel ring is embedded in the outer sleeve of the centering bearing to achieve the same purpose of not damaging the inner diameter of the bearing.

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