Rolling rod for bearing outer circle rolling machine

Abstract

The utility model discloses a rolling bar for a bearing excircle rolling machine, which comprises a round bar-shaped bar body, a steel sleeve is fixed on the radial outer side of the bar body, the steel sleeve is a bearing steel sleeve which is subjected to integral quenching treatment, narrow-diameter sections are respectively and integrally arranged on two sides of the bar body, and the narrow-diameter sections are respectively and integrally arranged on two sides of the bar body. A pressing plate is arranged on the radial outer side of each narrow-diameter section, and the two ends of the steel sleeve are pressed by the two pressing plates respectively. According to the rolling rod for the bearing outer circle rolling machine, the steel sleeve is fixed to the radial outer side of the rod body, the steel sleeve is a bearing steel sleeve subjected to overall quenching treatment, the surface hardness of the steel sleeve can reach 58-64 HRC, the effective hardening layer thickness is the wall thickness of the steel sleeve, abrasion resistance is good, the hardness uniformity of the hardening layer is remarkably improved compared with a traditional rolling rod, and the service life of the rolling rod is prolonged. And the shape precision is high, so that the service life of the rolling rod can be greatly prolonged, the finishing frequency of the rolling rod is reduced, and the production quality, stability and production efficiency of the bearing outer ring are improved.

Description

Technical Field

[0001] This utility model relates to a rolling mill accessory for machining the outer diameter of bearings, specifically a rolling bar for a bearing outer diameter rolling mill. Background Technology

[0002] In bearing manufacturing, a bearing outer diameter grinding machine is typically used to grind the outer diameter surface of the bearing outer ring to remove the support marks left during grinding. The bearing outer diameter grinding machine is equipped with two rollers, with an oilstone placed above them. During grinding, the two opposing rollers support the bearing outer ring to be ground and move it forward. When the bearing outer ring moves to the level of the oilstone, its outer diameter surface is ground by the oilstone. The shape accuracy and wear resistance of the rollers are crucial to the dimensional accuracy of the finished bearing outer ring.

[0003] Existing rollers are typically made of alloy steel, with a surface hardness of 50–58 HRC after high-frequency quenching, and a hardened layer thickness of 3–5 mm, exhibiting uneven hardness. Because the rollers are in direct contact with the bearing outer ring during processing, localized wear occurs on the outer diameter surface after a period of use. This necessitates periodic disassembly and grinding of the outer diameter surface, impacting production efficiency. Furthermore, due to the limited depth of the hardened layer, after a certain number of finishing cycles, the layer thins, reducing hardness and wear resistance, rendering the rollers unusable and requiring disposal. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a roller for a bearing outer circle rolling machine that has good wear resistance, high shape accuracy and long service life, in order to overcome the shortcomings of the existing technology.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a roller for a bearing outer circle grinding machine, comprising a round rod body, a steel sleeve fixed on the radial outer side of the rod body, the steel sleeve being a bearing steel sleeve that has undergone integral quenching treatment, narrow diameter sections integrally provided on both sides of the rod body, a pressure plate provided on the radial outer side of each narrow diameter section, and the two ends of the steel sleeve being pressed by the two pressure plates respectively.

[0006] This invention involves fixing a steel sleeve to the radial outer side of the roller body. During use, the steel sleeve directly supports the bearing outer ring to be rolled and drives it forward. The steel sleeve used is a bearing steel sleeve that has undergone integral quenching treatment, with a surface hardness of 58-64 HRC. The effective hardened layer thickness is the same as the wall thickness of the steel sleeve. It has good wear resistance, and the uniformity of hardened layer hardness is significantly improved compared to traditional rollers. This greatly increases the service life and shape accuracy of the roller, reduces the frequency of roller dressing, and improves the production quality, stability, and efficiency of the bearing outer ring.

[0007] After designing the steel sleeve, the outer diameter of the bar can be reduced accordingly, and the outer diameter of the steel sleeve can be designed to be the same as the outer diameter of the traditional rolling bar, so no modification to the rolling mill is required.

[0008] Preferably, the steel sleeve is composed of multiple steel rings spliced ​​together, and the multiple steel rings are sequentially press-fitted onto the outer diameter surface of the rod body. The steel sleeve adopts a split structure design with multiple steel rings, which facilitates installation and ensures the shape accuracy and performance of the roller.

[0009] Preferably, the inner diameter surface, outer diameter surface, and end faces of each steel ring are all machined surfaces that have been ground, so that each steel ring can be heated and pressed onto the rod body, ensuring the installation accuracy and reliability of the steel ring.

[0010] Preferably, the two pressure plates are fixed to both ends of the rod body by bolts. The function of the two pressure plates is to axially position the steel sleeve, further improving the installation accuracy of the steel sleeve.

[0011] Preferably, the wall thickness of the steel sleeve is 25-35 mm.

[0012] Preferably, each narrow diameter segment is integrally connected to an installation segment on its radially outer side. The outer diameter of each installation segment is smaller than that of each narrow diameter segment. Two positioning bearings are fixed to the outer diameter surface of each installation segment. The two positioning bearings are mounted on a bearing housing. A bearing housing cover plate is installed on the radially outer side of the bearing housing.

[0013] Compared with the prior art, the present invention has the following advantages: The bearing outer circle rolling mill of the present invention uses a rolling bar with a steel sleeve fixed on the radial outer side of the bar body. The steel sleeve is a bearing steel sleeve that has undergone integral quenching treatment, and its surface hardness can reach 58-64HRC. The effective hardened layer thickness is the wall thickness of the steel sleeve. It has good wear resistance, and the hardness uniformity of the hardened layer is significantly improved compared with traditional rolling bars. This can greatly improve the service life and shape accuracy of the rolling bar, reduce the frequency of rolling bar dressing, and improve the production quality, stability and production efficiency of the bearing outer ring. Attached Figure Description

[0014] Figure 1 This is a longitudinal section diagram of the roller structure in the embodiment;

[0015] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0016] Figure 3 This is a cross-sectional schematic diagram of the roller in use in the embodiment;

[0017] The specific reference numerals in the figure are as follows:

[0018] 1-Bar body, 11-Narrow diameter section, 12-Installation section, 2-Steel sleeve, 21-Steel ring, 3-Pressure plate, 31-Bolt, 4-Positioning bearing, 5-Bearing seat, 6-Bearing seat cover plate, 7-Bearing outer ring, 8-Oilstone, 81-Oilstone frame. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Processes, apparatus, structures, or components not limited in this invention all employ conventional techniques in the art.

[0020] The roller used in the bearing outer diameter grinding machine of the embodiment, such as Figure 1 and Figure 2 As shown, it includes a cylindrical rod body 1, a steel sleeve 2 fixed on the radial outer side of the rod body 1, the steel sleeve 2 being a bearing steel sleeve 2 that has undergone integral quenching treatment, narrow diameter sections 11 integrally provided on both sides of the rod body 1, a pressure plate 3 provided on the radial outer side of each narrow diameter section 11, the two pressure plates 3 being fixed to both ends of the rod body 1 by bolts 31, and the two ends of the steel sleeve 2 being pressed by the two pressure plates 3 respectively.

[0021] In this embodiment, the steel sleeve 2 is composed of multiple steel rings 21 spliced ​​together. The inner diameter surface, outer diameter surface and two end faces of each steel ring 21 are all machined surfaces that have been ground. Multiple steel rings 21 are sequentially press-fitted onto the outer diameter surface of the rod body 1.

[0022] In this embodiment, an installation section 12 is integrally connected to the radial outer side of each narrow diameter section 11. The outer diameter of each installation section 12 is smaller than the outer diameter of each narrow diameter section 11. Two positioning bearings 4 are fixed on the outer diameter surface of each installation section 12. The two positioning bearings 4 are installed on a bearing seat 5. A bearing seat cover plate 6 is installed on the radial outer side of the bearing seat 5.

[0023] In this embodiment, the outer diameter of the roller is Ф170mm, wherein the outer diameter of the roller body 1 is Ф110mm, and the wall thickness of the steel sleeve 2 is 30mm. The surface hardness of the steel sleeve 2 is 58-64HRC, the effective hardened layer thickness is 30mm, and the hardened layer has good wear resistance and hardness uniformity. This roller has a long service life, high shape accuracy, and low dressing frequency, which can improve the production quality, stability, and production efficiency of the bearing outer ring.

[0024] Two of the aforementioned rollers need to be installed on the bearing outer diameter rolling mill. For example... Figure 3 As shown, during the use of the roller, the bearing outer ring 7 to be rolled is directly supported by the steel sleeve 2 and driven to move forward. When the bearing outer ring 7 moves forward to the bottom of the oilstone 8 installed on the oilstone frame 81, the outer diameter surface of the bearing outer ring 7 is ground by the oilstone 8.

Claims

1. A roller for a bearing outer diameter grinding machine, characterized in that, The device includes a cylindrical rod body, a steel sleeve fixed to the radial outer side of the rod body, the steel sleeve being a bearing steel sleeve that has undergone integral quenching treatment, narrow diameter sections integrally provided on both sides of the rod body, a pressure plate provided on the radial outer side of each narrow diameter section, and the two ends of the steel sleeve being pressed tightly by the two pressure plates respectively.

2. The roller for a bearing outer diameter grinding machine according to claim 1, characterized in that, The steel sleeve is composed of multiple steel rings spliced ​​together, and the multiple steel rings are sequentially press-fitted onto the outer diameter surface of the rod body.

3. A roller for a bearing outer diameter grinding machine according to claim 2, characterized in that, The inner diameter surface, outer diameter surface, and end faces of each steel ring are all machined surfaces that have been ground.

4. A roller for a bearing outer diameter grinding machine according to claim 1, characterized in that, The two pressure plates are respectively fixed to both ends of the rod body by bolts.

5. A roller for a bearing outer diameter grinding machine according to any one of claims 1-4, characterized in that, The wall thickness of the steel sleeve is 25-35 mm.

6. A roller for a bearing outer diameter grinding machine according to claim 1, characterized in that, Each narrow diameter segment is integrally connected to an installation segment on its radially outer side. The outer diameter of each installation segment is smaller than that of each narrow diameter segment. Two positioning bearings are fixed to the outer diameter surface of each installation segment. The two positioning bearings are mounted on a bearing housing. A bearing housing cover plate is installed on the radially outer side of the bearing housing.

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