Rolling tool for closing up bearing support

Abstract

The rolling tool comprises a body, a baffle, balls, a rhombic pin and a base plate, the body is of a cross-shaped columnar structure, a first hole is formed in the center of one end of the body in the axial direction and fixedly installed with a tail cone on a vertical milling machine in a matched mode, and a second hole is formed in the center of the other end of the body in the axial direction and fixedly installed with the rhombic pin in a matched mode. A plurality of grooves are formed in the end face of the end, close to the second hole, of the body in the axial direction, a plurality of balls are arranged in the annular grooves, the center distance between the balls and the grooves is the center size required by closing-in, a third hole matched with the rhombic pin is formed in the center of the baffle along the axis, and a through hole with the minimum diameter smaller than that of the balls and the inner side face being an inclined face is formed in the baffle and matched with the balls. The baffle is fixedly connected with the body in a matched mode to block the balls in the grooves to rotate freely. After the tool is adopted for closing up, the size consistency is good, a rolling tool rotates, parts are fixed, the rolling tool can be used as long as the appearance space of the parts is enough, the parts are stressed more evenly, the closing-up surface quality is good, assembly and disassembly are convenient, and maintenance and replacement are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of machining, especially relates to a rolling tool for bearing support closing. BACKGROUND

[0002] The closing of the bearing support refers to that after the bearing is pressed into the support hole, the upper and lower surfaces of the support are extruded by the closing tool, the material of the extruded support is plastically deformed and adheres to the outer ring of the bearing, so that the bearing is fixed. Figure 18 19 The size of the closing of different specifications is the same, and only the outer dimension is different. Figure 17 Therefore, a general tool without damaging the surface of the part is needed to complete the closing of different parts. SUMMARY

[0003] The utility model discloses a kind of rolling tools for bearing support closing, can guarantee that after being closed, 980N load test is withstood, bearing does not fall off, and the surface of not being closed is not damaged, to make operator easy to use.

[0004] To achieve the purpose of the utility model, the technical scheme adopted is: a kind of rolling tool for bearing support closing, the tool is used on vertical milling machine, is constituted by body, baffle, steel ball, rhombic pin and screw etc.

[0005] A kind of rolling tool for bearing support closing, including body, baffle, ball, rhombic pin, backing plate, the body is cross type columnar structure, one end center is equipped with hole one along axial direction and is fixedly installed with vertical milling machine tail vertebra cooperation, another end center is equipped with hole two along axial direction and is fixed with rhombic pin cooperation, the body is equipped with several grooves along axial direction near hole two end face, the several balls are placed in annular groove, the center distance of ball and groove is the center size required by closing, the baffle center is equipped with hole three along axial line and is fixed with rhombic pin cooperation, the baffle is equipped with the inner side surface of inclined plane with minimum diameter smaller than ball and is fixedly connected with body cooperation, ball is blocked in groove and rotates freely, so that ball is rolled to bearing support 30 ° angle groove.

[0006] ​Further, the baffle is provided with pin hole one and the pin hole three on the body is fixedly connected through a positioning pin, and the pin hole two on the baffle is fixedly connected through a screw with the pin hole four on the body.

[0007] Further, the baffle and the body are connected through welding.

[0008] Since the end face of the bearing support has a pre-processed deformation groove (β+α), a steel ball is used for rolling and closing. According to the structural characteristics that all the parts are non-rotating bodies, it is not easy to clamp, and the tool is rotated, and the part is fixed. The rolling tool is installed on a vertical milling machine through a tail cone, (a vertical drilling machine can also be used, but the milling machine is convenient for controlling the depth). The machine tool is operated to rotate the tool and pass the steel ball on the roller to the α angle groove on the support to produce plastic deformation of the material, and the ring groove is contracted to the bearing mounting hole, forming a closing on the bearing outer ring. According to the standard requirements of HB0-37-2003 bearing installation and fixation, the upper and lower bearing outer rings after closing should be 0.2mm lower than the end face of the support, so a pad is needed during rolling, and a 0.2 high boss is processed on the pad to tightly contact the bearing outer ring, so that the distance between the end face of the bearing outer ring and the end face of the support is 0.2mm after closing. Eight φ4mm steel balls are installed on the rotating roller, and the steel balls are flexible after the baffle is assembled. The center distance of the steel balls is the center size required for closing, and the closing size is good in consistency. Because the bearing inner ring can rotate, in order to facilitate alignment, a positioning shaft is installed on the center of the roller for guidance, which is convenient for the operator to align the center of the part. For the bearing support with a space size <φ40, because the outer shape size of the tool is close to the center size of the ball, it cannot be fixed by screws and pins, therefore, the baffle and the body of the tool are connected by point welding of the ring groove, and the welding points at the point welding position need to be removed when the steel ball is replaced.

[0009] The bearing support closed by the rolling tool is subjected to a 980N pressure load test, and meets the design requirements.

[0010] The beneficial effects of the utility model are as follows:

[0011] 1. The center size of the steel ball of the bearing rolling tool is the center size of the bearing closing, and the closing size is good in consistency. As long as the bearing support size is consistent and the space size can allow the rolling tool diameter to be opened, it can be used.

[0012] 2. The bearing support closing tool adopts ball rolling, the part is subjected to more uniform stress, and the surface quality is better.

[0013] 3. The front end of the rolling tool is provided with a positioning pin inserted into the bearing hole of the part for rolling, which reduces the time for the operator to align the center of the part.

[0014] 4. The rolling tool and the pad are used in combination to ensure that the end face of the bearing support after closing is 0.2mm lower than the end face of the part body.

[0015] 5. The rolling tool uses steel ball rolling, screw pin installation, wear replacement, and easy disassembly.

[0016] 6. The rolling tool is used in a vertical milling machine, facilitating depth control. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings incorporated in the specification and forming a part thereof illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application. In the drawings, which are made in accordance with the present application:

[0018] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict.

[0019] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0020] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] Figure 1 Structure diagram of one of the connection modes of the rolling tool for closing the bearing support provided by the present application;

[0022] Figure 2 ForFigure 1 AA cross-section view;

[0023] Figure 3 for Figure 1 A schematic diagram of the structure of the main body;

[0024] Figure 4 for Figure 3 BB cross-section;

[0025] Figure 5 for Figure 1 Schematic diagram of the middle baffle;

[0026] Figure 6 for Figure 5 CC cross-section;

[0027] Figure 7 This is a structural diagram of a diamond-shaped pin;

[0028] Figure 8 This is a structural diagram of a locating pin;

[0029] Figure 9 This is a schematic diagram of the pad structure;

[0030] Figure 10 Top view of the pad

[0031] Figure 11 A schematic diagram of another connection method for the rolling tool for closing the bearing bracket provided by this utility model;

[0032] Figure 12 for Figure 11 DD cross-section;

[0033] Figure 13 for Figure 11 A schematic diagram of the structure of the main body;

[0034] Figure 14 for Figure 13 EE cross-section;

[0035] Figure 15 for Figure 11 Schematic diagram of the middle baffle;

[0036] Figure 16 for Figure 15 FF cross-sectional view;

[0037] Figure 17 structural diagram of parts requiring sealing

[0038] Figures 18-19 3D drawing of parts requiring sealing

[0039] Attached Figure

[0040] Body, 11-hole one, 12-hole two, 13-groove, 14-pin hole two, 15-tapped hole two

[0041] Baffle, 21-through hole, 22-pin hole one, 23-tapped hole one, 24-hole three

[0042] Ball, 4-rhombic pin, 5-plate, 51-hole four, 52-boss, 6-positioning pin, 7-screw,

[0043] 8-bearing parts, 81-bearing outer ring, 82-bearing inner ring, ɑ-rolling groove angle, β-no rolling groove angle. DETAILED DESCRIPTION

[0044] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example implementations to those skilled in the art.

[0045] Please refer to Figures 1-8 , the structure schematic diagram of the rolling tool for bearing support closing is shown, including body 1, baffle 2, ball 3, rhombic pin 4, the body 1 is cross-shaped columnar structure, one end center is provided with hole one 11 along the axial direction and is fixedly installed with the cooperation of the upper tail vertebra of vertical milling machine, the other end center is provided with hole two 12 along the axial direction and is fixed with the cooperation of the rhombic pin 4, the end face of the body 1 close to hole two 12 is provided with a plurality of grooves 13 along the axial direction, a plurality of balls 3 are placed in the grooves 13, the center distance between the ball 3 and the groove 13 is the center size required for closing, the baffle 2 is provided with inclined surface through hole 21 cooperating with the ball 3, the minimum diameter of which is smaller than that of the ball 3, the baffle 2 is provided with hole three 24 cooperating with the rhombic pin 4 at the center along the axis, the baffle 2 is fixedly connected with the body 1 to block the ball 3 in the groove 13 and rotate freely, so that the ball 3 rolls on the bearing part ɑ angle groove and makes the material produce plastic deformation to form the closing on the bearing outer ring 81, wherein the ball 3 is provided as 8 φ4mm steel balls, and the steel ball is a standard part purchased. After rolling one end, the other end is used for rolling, so that the size consistency after closing is good, the rolling tool rotates, the part does not move, as long as the part shape space is sufficient, it can be used, the part is stressed more evenly, and the closing surface quality is good.

[0046] When the bearing support part is larger than or equal to φ40, the baffle 2 and the body 1 are connected by the positioning pin 6 and the screw 7. The pin hole one 22 on the baffle 2 is matched with the pin hole two 14 on the body 1 to be fixedly connected by the positioning pin 6. The screw hole one 23 on the baffle 2 is matched with the screw hole two 15 on the body 1 to be fixedly connected by the screw 7. The distance between the end surface of the bearing outer ring 81 and the end surface of the support is 0.2mm. In use, the gasket 5 can be used. The screw pin is installed. When it needs to be replaced due to wear, it is convenient to disassemble. The front end is inserted into the bearing hole of the part to roll and press, so as to reduce the time for the operator to find the center of the part.

[0047] Figures 11-16 Another connection structure diagram of the rolling tool for the bearing support closing is shown. The baffle 2 and the body 1 are connected by welding. It is mainly designed for the bearing support part with a size smaller than φ40. Because the size of the tool is close to the size of the ball center, the screw pin cannot be fixed, so the baffle 2 and the body 1 of the tool are connected by point welding of the outer circle ring groove. When the ball 3 is replaced, the welding point at the point welding position needs to be removed. The distance between the end surface of the bearing outer ring and the end surface of the support is 0.2mm. In use, the gasket 5 can be used.

[0048] The bearing support closed by the rolling tool is subjected to a load test of 980N pressure force. The design requirements are met.

[0049] The body 1 and the baffle 2 are made of wear-resistant alloy tool steel GCr15. The heat treatment hardness is HRC55-60. The screw 7, the diamond pin 4 and the positioning pin 6 are only used for connection. 1Cr17Ni2 is selected. The quenching hardness is HRC35-40. In this way, the machining can be carried out after heat treatment, so as to avoid the size deformation after heat treatment.

[0050] Figures 9-10 The gasket is shown. In use, the rolling tool can be used with the gasket 5. The part bearing 8 passes through the hole four 51. The gasket 5 is processed to have a boss 52 with a height of 0.2mm, which is tightly attached to the bearing outer ring 81. In this way, the distance between the end surface of the bearing outer ring 81 and the end surface of the support 83 can be guaranteed to be 0.2mm after closing.

[0051] Figures 17-19 The part that needs to be closed is shown. The bearing part 8 is a non-rotating body. The shapes are different. The closing size is the same. The rolling groove angle a is 30°. The rolling groove angle β is 55°. The end surface of the rolling groove angle a is rolled by the rolling tool, so that the material is plastically deformed. The rolling groove is contracted to the bearing mounting hole, so as to form the closing attached to the bearing outer ring 81.

[0052] The above examples are only used to illustrate the technical solutions of the present application and not to limit the present application, and any modification or equivalent replacement to the technical solutions of the present application made by those skilled in the art shall be covered in the scope of the claims of the present application, without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A rolling tool for closing the end of a bearing bracket, characterized in that: The system includes a body (1), a baffle (2), ball bearings (3), and a diamond pin (4). The body (1) has a cross-shaped columnar structure. One end of the body has a hole (11) along the axial direction at its center, which is used to fix the tailstock of the machine tool. The other end has a hole (12) along the axial direction at its center, which is used to fix the diamond pin (4). The end face of the body (1) near the hole (12) has several grooves (13) along the axial direction. The ball bearings (3) are placed in the grooves (13). 3) The center distance between the baffle (2) and the groove (13) is the center dimension required for the closing. The baffle (2) is provided with a through hole (21) with a minimum diameter smaller than that of the inner surface of the ball (3) and an inclined surface. The baffle (2) is provided with a hole (24) along the axis of the center to cooperate with the diamond pin (4). The baffle (2) is fixedly connected to the body (1) to block the ball (3) in the groove (13) and allow it to rotate freely, so that the ball (3) rolls the 30° angle groove of the bearing bracket.

2. The rolling tool for closing the bearing bracket according to claim 1, characterized in that: The baffle (2) and the body (1) are connected by positioning pins (6) and screws (7). The baffle (2) has a pin hole 1 (22) that cooperates with the pin hole 2 (14) on the body (1) and is fixedly connected by positioning pins (6). The screw hole 1 (23) on the baffle (2) cooperates with the screw hole 2 (15) on the body (1) and is fixedly connected by screws (7).

3. The rolling tool for closing the bearing bracket according to claim 1, characterized in that: The baffle (2) is connected to the body (1) by welding.

4. The rolling tool for closing the bearing bracket according to claim 1, characterized in that: The requirement that the distance between the outer ring end face of the bearing and the end face of the bracket be 0.2mm can be met when using it in conjunction with a pad (5).

5. The rolling tool for closing the bearing bracket according to claim 1, characterized in that: The ball bearing (3) is set to 8 steel balls with a diameter of 4mm.

6. The rolling tool for closing the bearing bracket according to claim 1, characterized in that: Therefore, the materials for the body (1) and the baffle (2) are selected as wear-resistant alloy tool steel GCr15, with a heat treatment hardness of HRC55~60.

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