A positioning fixture for outer circle grinding of a tapered roller

Abstract

This utility model relates to the field of bearing processing technology, and in particular to a positioning fixture for grinding the outer diameter of tapered rollers. It includes a processing table with a groove in the upper center. By designing a positioning fixture for grinding the outer diameter of tapered rollers, a drive motor rotates a rotating rod and a disc, causing the cylinder to slide along the arc-shaped groove. This pushes the positioning blocks to move radially along the slot, achieving multi-point synchronous positioning of the outer diameter of the tapered rollers. The even distribution of five sets of positioning blocks ensures the coaxiality of the workpiece, avoids clamping deviations, effectively improves the dimensional accuracy and roundness after grinding, and reduces the scrap rate. The relative position of the tapered rollers and the processing box can be adjusted by using a lead screw and guide rod to drive the moving blocks and support frame, accommodating workpieces of different lengths. Simultaneously, the radial adjustability of the positioning blocks allows it to be compatible with tapered rollers of various diameters without requiring replacement of the fixture body, reducing auxiliary time and tooling costs.

Description

Technical Field

[0001] This utility model relates to the field of bearing processing technology, and in particular to a positioning fixture for grinding the outer diameter of tapered rollers. Background Technology

[0002] As a core rolling element in critical components such as rolling bearings, gear transmission systems, and engineering machinery, the geometric accuracy, surface roughness, and dimensional consistency of the outer cylindrical surface of tapered rollers directly affect the bearing's load-bearing capacity, operational stability, noise level, and service life. External cylindrical grinding, as the final finishing process in tapered roller machining, directly determines the quality grade of the final product. Furthermore, the dimensional accuracy, roundness, and surface roughness of the outer cylindrical surface of tapered rollers in mechanical transmission components such as bearings and gearboxes directly impact the overall machine's operational stability and service life. External cylindrical grinding is the core process in tapered roller machining, and the accuracy and stability of the positioning fixture directly determine the grinding quality.

[0003] Commonly used fixtures often employ simple mechanical chucks or elastic sleeves for positioning, relying on manual adjustment. This makes it difficult to achieve precise coaxial positioning of the outer diameter of tapered rollers, and clamping deviations can easily lead to inconsistent grinding dimensions, affecting the product qualification rate.

[0004] To address the above problems, a positioning fixture for tapered roller external cylindrical grinding needs to be designed to overcome them. Utility Model Content

[0005] The main purpose of this utility model is to provide a positioning fixture for grinding the outer diameter of tapered rollers, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A positioning fixture for external cylindrical grinding of tapered rollers includes a machining table. A groove is formed in the middle of the upper side of the machining table. A lead screw is rotatably connected to the inside of the groove via a bearing. A guide rod is fixedly installed on the inner wall of the groove near the lead screw. A movable block is threadedly connected to the outer wall of the lead screw. The guide rod passes through the middle of the movable block. A support frame is fixedly installed on the upper side of one end of the movable block. A sliding groove is formed in the middle of the support frame. A slider is embedded in the inner wall of the sliding groove. A rotating rod is rotatably connected to the middle of the slider via a bearing. A drive motor is fixedly installed on the outer wall of one side of the slider.

[0007] As a preferred embodiment of this utility model, the output end of the drive motor is fixedly connected to one end of the rotating rod via a coupling, and a disc is fixedly connected to the outer wall of one end of the rotating rod.

[0008] As a preferred embodiment of this utility model, the outer wall of the disc is provided with arc-shaped grooves, and the inner wall of the arc-shaped grooves is slidably connected with cylinders.

[0009] As a preferred embodiment of this utility model, one end of the rotating rod is rotatably connected to a cylinder via a bearing, and the cylinder has slots arranged around its circumference.

[0010] As a preferred embodiment of this utility model, a positioning block is embedded in the inner wall of the slot, and the other end of the cylinder is fixedly connected to the outer wall of one side of the positioning block.

[0011] As a preferred embodiment of this utility model, an electric push rod is fixedly installed on the top of the support frame, and a processing box is fixedly installed on the upper side of one end of the processing table.

[0012] As a preferred embodiment of this utility model, a drain pipe is fixedly installed on one side of the processing box, an electric telescopic rod is fixedly installed on one end of the processing table, and a clamping block is rotatably connected to one end of the electric telescopic rod through a bearing. The number of positioning blocks is five.

[0013] As a preferred embodiment of this utility model, the number of cylindrical sections is five, and the number of arc-shaped grooves and slots is also five.

[0014] Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: 1. In this utility model, a positioning fixture for grinding the outer diameter of a tapered roller is designed. By driving a motor to rotate a rotating rod and a disc, the cylinder slides along an arc groove, pushing the positioning block to move radially along the slot, thereby achieving multi-point synchronous positioning of the outer diameter of the tapered roller. The even distribution of five sets of positioning blocks can ensure the coaxiality of the workpiece, avoid clamping deviation, effectively improve the dimensional accuracy and roundness after grinding, and reduce the scrap rate.

[0015] 2. In this utility model, a positioning fixture for external cylindrical grinding of tapered rollers is designed. By using the cooperation of a lead screw and a guide rod to drive the moving block and support frame to move, the relative position of the tapered rollers and the processing box can be adjusted to adapt to workpieces of different lengths. At the same time, the radial adjustability of the positioning block makes it compatible with tapered rollers of various diameters without the need to replace the fixture body, thus reducing auxiliary time and tooling costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the processing table and processing box of this utility model; Figure 2 This is a schematic diagram of the structure of the drive motor and the cylinder of this utility model; Figure 3 This is a schematic diagram of the structure of the cylinder and positioning block of this utility model.

[0017] In the diagram: 1. Machining table; 2. Machining box; 3. Drain pipe; 4. Groove; 5. Motor; 6. Lead screw; 7. Guide rod; 8. Moving block; 9. Support frame; 10. Slide groove; 11. Electric push rod; 12. Drive motor; 13. Slider; 14. Electric telescopic rod; 15. Clamping block; 16. Rotating rod; 17. Disc; 18. Arc groove; 19. Cylinder; 20. Cylindrical tube; 21. Positioning block; 22. Slot. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] like Figure 1-3 As shown, a positioning fixture for external cylindrical grinding of tapered rollers includes a machining table 1. A groove 4 is formed in the middle of the upper side of the machining table 1. A lead screw 6 is rotatably connected to the inside of the groove 4 through a bearing. A guide rod 7 is fixedly installed on the inner wall of the groove 4 near the lead screw 6. A moving block 8 is threadedly connected to the outer wall of the lead screw 6. The guide rod 7 passes through the middle of the moving block 8. A support frame 9 is fixedly installed on the upper side of one end of the moving block 8. A sliding groove 10 is formed in the middle of the support frame 9. A slider 13 is embedded in the inner wall of the sliding groove 10. A rotating rod 16 is rotatably connected to the middle of the slider 13 through a bearing. A drive motor 12 is fixedly installed on the outer wall of one side of the slider 13.

[0020] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 3 As shown, the output end of the drive motor 12 is fixedly connected to one end of the rotating rod 16 via a coupling. A disc 17 is fixedly connected to the outer wall of one end of the rotating rod 16. An arc-shaped groove 18 is arranged on the outer wall of the disc 17. A cylinder 19 is slidably connected to the inner wall of the arc-shaped groove 18. A cylinder 20 is rotatably connected to one end of the rotating rod 16 via a bearing. A slot 22 is arranged around the circumference of the cylinder 20. A positioning block 21 is embedded in the inner wall of the slot 22. The other end of the cylinder 19 is fixedly connected to one side of the outer wall of the positioning block 21. An electric push rod 11 is fixedly installed on the top of the support frame 9. A processing box 2 is fixedly installed on the upper side of one end of the processing table 1. A drain pipe 3 is fixedly installed on one side of the processing box 2. An electric telescopic rod 14 is fixedly installed on one end of the processing table 1. A clamping block 15 is rotatably connected to one end of the electric telescopic rod 14 via a bearing. Five sets of positioning blocks 21 and five sets of cylinders 19 are provided. Five sets of arc-shaped grooves 18 and slots 22 are provided. Among them, the clamping block 15 driven by the electric telescopic rod 14 and the positioning block 21 form a bidirectional clamping, which, together with the bearing rotation structure, can prevent the workpiece from axially moving or radially shifting under the action of grinding force, and can also assist the workpiece to rotate smoothly, avoid loosening caused by vibration, ensure the stability of the processing process, and extend the service life of the grinding wheel. The design of the processing box 2 and the drain pipe 3 facilitates the collection and discharge of grinding fluid, keeping the working environment clean. Among them, the lead screw 6 adopts a high-precision ball screw with a pitch of 5mm. With the drive of the servo motor 5, it can achieve a minimum positioning accuracy of 0.01mm; the guide rod 7 is a hardened cylindrical guide rail with chrome-plated surface for rust prevention. It is connected to the moving block 8 through a linear bearing to reduce frictional resistance. The inner wall of the cylinder 20 is embedded with 6 evenly distributed spring steel sheets with a thickness of 1mm. The slot 22 is a T-slot. The tail of the positioning block 21 is equipped with a slider that matches the T-slot. The preload of the disc spring between the slider and the bottom of the slot is 50N. The combination of the T-slot and the disc spring can maintain the positional stability of the positioning block 21 under grinding vibration and prevent the workpiece from loosening. The bottom of the processing box 2 is a funnel-shaped structure with an inclination angle of 15°. The drain pipe 3 connects the magnetic separator and the paper tape filter with a filtration accuracy of 20μm. A liquid level sensor is installed on the side wall of the box to monitor the grinding fluid volume in real time.

[0021] The working process of this utility model is as follows: Using the tapered roller outer diameter grinding positioning fixture designed in this scheme, during operation, one end of the tapered roller's outer diameter is fitted onto the outer wall of the positioning block 21 of the cylinder 20. The drive motor 12 is switched on via an external controller, causing the rotating rod 16 to rotate. The rotating rod 16 then rotates the disc 17, causing the cylinder 19 to slide along the inner wall of the arc groove 18. Simultaneously, the positioning block 21 at one end of the cylinder 19 slides out along the inner wall of the slot 22, facilitating the positioning of the tapered roller's outer diameter and preventing slippage. The external controller controls the extension and retraction of the electric push rod 11, pushing the drive motor 12 downwards, thereby moving the slider 13... The tapered roller slides down along the inner wall of the groove 10. The motor 5 is turned on by the external controller. The motor 5 drives the lead screw 6 to rotate. The groove 4 and the guide rod 7 work together to move the moving block 8 and the support frame 9. The position of the tapered roller's outer circle from the processing box 2 is adjusted according to the length of the outer circle of the tapered roller. The electric telescopic rod 14 is controlled by the external controller to push the clamping block 15 to clamp the other end of the tapered roller's outer circle. A bearing is installed on one side of the clamping block 15 at one end of the electric telescopic rod 14 to facilitate the rotation of the tapered roller's outer circle during processing. The material is received through the processing box 2 and drained through the drain pipe 3 to facilitate the processing of the tapered roller's outer circle.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning fixture for grinding the outer diameter of tapered rollers, comprising a machining table (1), characterized in that: The processing table (1) has a groove (4) in the middle of its upper side. A lead screw (6) is rotatably connected to the inside of the groove (4) through a bearing. A guide rod (7) is fixedly installed on the inner wall of the groove (4) near the lead screw (6). A moving block (8) is threadedly connected to the outer wall of the lead screw (6). The guide rod (7) passes through the middle of the moving block (8). A support frame (9) is fixedly installed on the upper side of one end of the moving block (8). A sliding groove (10) is opened in the middle of the support frame (9). A slider (13) is embedded in the inner wall of the sliding groove (10). A rotating rod (16) is rotatably connected to the middle of the slider (13) through a bearing. A drive motor (12) is fixedly installed on the outer wall of one side of the slider (13).

2. The positioning fixture for tapered roller external grinding according to claim 1, characterized in that: The output end of the drive motor (12) is fixedly connected to one end of the rotating rod (16) via a coupling, and a disc (17) is fixedly connected to the outer wall of one end of the rotating rod (16).

3. The positioning fixture for tapered roller external grinding according to claim 2, characterized in that: The outer wall of the disc (17) is provided with arc-shaped grooves (18), and the inner wall of the arc-shaped grooves (18) is slidably connected with cylinders (19).

4. A positioning fixture for tapered roller external grinding according to claim 3, characterized in that: One end of the rotating rod (16) is rotatably connected to a cylinder (20) via a bearing, and the cylinder (20) has slots (22) arranged around its circumference.

5. A positioning fixture for tapered roller external grinding according to claim 4, characterized in that: The inner wall of the slot (22) is fitted with a positioning block (21), and the other end of the cylinder (19) is fixedly connected to the outer wall of one side of the positioning block (21).

6. A positioning fixture for tapered roller external grinding according to claim 5, characterized in that: An electric push rod (11) is fixedly installed on the top of the support frame (9), and a processing box (2) is fixedly installed on the upper side of one end of the processing table (1).

7. A positioning fixture for tapered roller external grinding according to claim 6, characterized in that: A drain pipe (3) is fixedly installed on one side of the processing box (2), an electric telescopic rod (14) is fixedly installed on one end of the processing table (1), and a clamping block (15) is rotatably connected to one end of the electric telescopic rod (14) through a bearing. The number of positioning blocks (21) is five.

8. A positioning fixture for tapered roller external grinding according to claim 7, characterized in that: The number of cylinders (19) is five, and the number of arc grooves (18) and slots (22) is five.

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