Hyperbolic roller manufacturing process

Abstract

The invention discloses a hyperbolic roller manufacturing process, which belongs to the technical field of roller manufacturing, and comprises the following steps of: 1, fixing a cylindrical roller on a roller mounting mandrel to form a to-be-sanded part; secondly, the to-be-sanded part in the first step is clamped on a cylindrical grinding machine, and an inclined included angle is formed between the axis of a roller installation mandrel of the clamped to-be-sanded part and the axis of a main shaft of the cylindrical grinding machine; thirdly, the cylindrical grinding machine is started, and a grinding wheel of the cylindrical grinding machine moves left and right on the axis of a main shaft of the cylindrical grinding machine; and fourthly, the to-be-sanded part is rotated at the inclined included angle in the second step, the outer edge of the cylindrical roller makes contact with the outer edge of the grinding wheel for sanding in the rotating process of the to-be-sanded part till the diameter of the middle of the cylindrical roller is smaller than the diameter of the outer circles of the two ends of the cylindrical roller, and the hyperbolic roller is formed. According to the scheme, the size precision and the production efficiency are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of roller manufacturing, and provides a hyperbolic roller manufacturing process that improves dimensional accuracy and production efficiency. Background Art

[0002] In the valve stem straightening method disclosed in the Chinese patent application No. 2024109990975 of the applicant of this patent, a hyperbolic roller is involved. After the implementation of this hyperbolic roller, the probability of cracks generated during valve stem straightening can be significantly reduced, the pass rate of back angle runout sorting is greatly improved, the overall straightening pass rate is about 83%, and the manufacturing cost is reduced.

[0003] The existing manufacturing of hyperbolic rollers is based on cylindrical rollers and is manufactured by a grinding wheel machine and manual grinding, with poor dimensional accuracy and low production efficiency. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a hyperbolic roller manufacturing process, aiming to solve the problems of poor dimensional accuracy and low production efficiency during the production of existing hyperbolic rollers.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] The present invention provides a hyperbolic roller manufacturing process, including the following steps:

[0007] First step: Fix the cylindrical roller on the roller installation mandrel to form a workpiece to be sanded.

[0008] Second step: Clamp the workpiece to be sanded in the first step on an external cylindrical grinder. After clamping, the axis line of the roller installation mandrel of the workpiece to be sanded forms an inclined angle with the axis line of the main shaft of the external cylindrical grinder.

[0009] Third step: Start the external cylindrical grinder to make the grinding wheel of the external cylindrical grinder move left and right on the axis line of the main shaft of the external cylindrical grinder.

[0010] Fourth step: Rotate the workpiece to be sanded so that the workpiece to be sanded rotates at the inclined angle in the second step. During the rotation of the workpiece to be sanded, the outer edge of the cylindrical roller contacts the outer edge of the grinding wheel for sanding until the middle diameter of the cylindrical roller is smaller than the outer diameters of both ends of the cylindrical roller to form a hyperbolic roller.

[0011] To facilitate clamping of the workpiece to be sanded, in the above solution, further: on both end faces of the roller installation mandrel of the workpiece to be sanded in the second step, a front reference positioning hole and a rear reference positioning hole are provided, and a front eccentric center punch is arranged in the front reference positioning hole, and the front end of the front eccentric center punch is fixed in the taper hole of the main shaft of the external cylindrical grinder.

[0012] A rear eccentric ejector pin is arranged in the rear reference positioning hole, and the rear end of the rear eccentric ejector pin is fixed in the tapered hole of the tailstock center shaft of the cylindrical grinder.

[0013] To ensure that the outer edge of the hyperbolic roller is consistent with the design, in the above solution, further: after the front eccentric ejector pin and the rear eccentric ejector pin are installed, the worker aligns the process reference of the cylindrical roller within 0.01 mm and then locks the front eccentric ejector pin and the rear eccentric ejector pin respectively through the chuck at the tapered hole of the main shaft of the cylindrical grinder and the chuck at the tapered hole of the tailstock center shaft of the cylindrical grinder.

[0014] To improve production efficiency, in the above solution, further: a dog clutch drive assembly integrated with it is fixed on the roller mounting mandrel of the workpiece to be sanded.

[0015] To further ensure that the dimensional accuracy of the processed hyperbolic roller is consistent with the design dimensions and improve production efficiency, in the above solution, further: the inclination angle in the second step is 2.5°.

[0016] To ensure that the prepared hyperbolic roller is consistent with the design dimensions, in the above solution, further: the middle diameter of the cylindrical roller in the fourth step is 0.036 mm smaller than the outer diameters of both ends of the cylindrical roller.

[0017] The beneficial effects of the present invention are as follows:

[0018] By using two eccentric center pins for positioning on the cylindrical grinder in the tool workshop, a 2.5° angle is formed between the cylindrical roller and the axis of the grinder. The grinding wheel of the cylindrical grinder moves parallel to the axis of the main shaft of the cylindrical grinder to grind the outer circle of the cylindrical roller, so that the outer circle of the roller naturally forms a hyperbolic outer circle to form a hyperbolic roller, improving the dimensional accuracy. The setting of the dog clutch drive assembly can quickly rotate the workpiece to be sanded, improving production efficiency.

[0019] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent description, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail preferably with reference to the accompanying drawings, where:

[0021] Figure 1 It is a schematic structural diagram of the cylindrical roller of the present invention clamped on the front eccentric center pin and the rear eccentric center pin;

[0022] Figure 2 It is a schematic structural diagram of the front eccentric center pin of the present invention;

[0023] Reference numerals: 1, cylindrical roller; 2, roller mounting mandrel; 3, front reference positioning hole; 4, rear reference positioning hole; 5, front eccentric thimble; 6, rear eccentric thimble; 7, thimble alignment process reference surface. Specific embodiments

[0024] The present invention will be further described below in conjunction with specific embodiments. Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation of this patent; in order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The drawings provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0025] In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0026] As Figures 1 to 2 shown, a manufacturing process for a hyperbolic roller mentioned in the present invention includes the following steps

[0027] First step: Fix the cylindrical roller 1 on the roller mounting mandrel 2 to form a workpiece to be sanded.

[0028] Second step: Clamp the workpiece to be sanded in the first step on an external cylindrical grinder. There is an inclined angle between the axis of the roller mounting mandrel 2 of the clamped workpiece to be sanded and the axis of the main shaft of the external cylindrical grinder.

[0029] Third step: Start the external cylindrical grinder so that the grinding wheel of the external cylindrical grinder moves left and right on the axis of the main shaft of the external cylindrical grinder.

[0030] Fourth step: Rotate the workpiece to be sanded so that the workpiece to be sanded rotates at the inclined angle in the second step. During the rotation of the workpiece to be sanded, the outer edge of the cylindrical roller 1 contacts the outer edge of the grinding wheel for sanding until the middle diameter of the cylindrical roller 1 is smaller than the outer diameters of both ends of the cylindrical roller 1 to form a hyperbolic roller. In this embodiment, a commercially available conventional grinder can be used for the external cylindrical grinder, which is not the inventive point of the present invention. Therefore, the structure of the external cylindrical grinder is not shown in the drawings.

[0031] For the convenience of clamping the workpiece to be sanded, in the above embodiment, preferably: on both end faces of the roller mounting mandrel 2 of the workpiece to be sanded in the second step, a front reference positioning hole 3 and a rear reference positioning hole 4 are provided. A front eccentric center punch 5 is provided in the front reference positioning hole 3, and the front end of the front eccentric center punch 5 is fixed in the spindle taper hole of the cylindrical grinder;

[0032] A rear eccentric center punch 6 is provided in the rear reference positioning hole 4, and the rear end of the rear eccentric center punch 6 is fixed in the tailstock center shaft taper hole of the cylindrical grinder. In this embodiment, due to the positioning of the two eccentric center punches, the cylindrical roller forms a 2.5° angle with the axis line of the grinder. The method of the grinding wheel movement of the cylindrical grinder being parallel to the axis line of the spindle of the cylindrical grinder is used to grind the outer circle of the cylindrical roller, so that the outer circle of the roller naturally forms a hyperbolic outer circle and then forms a hyperbolic roller, improving the dimensional accuracy. The setting of the dog clutch drive assembly can effectively ensure the connection stability between the roller mounting mandrel 2 and the front eccentric center punch 5, and can quickly rotate the workpiece to be sanded, improving the production efficiency.

[0033] To ensure that the outer edge of the hyperbolic roller is consistent with the design, in the above embodiment, preferably: after the front eccentric center punch 5 and the rear eccentric center punch 6 are installed, the worker aligns the process reference of the cylindrical roller 1 within 0.01 mm, and then locks the front eccentric center punch 5 and the rear eccentric center punch 6 respectively through the chuck at the spindle taper hole of the cylindrical grinder and the chuck at the tailstock center shaft taper hole of the cylindrical grinder. Specifically, in implementation, the front eccentric center punch 5 and the rear eccentric center punch 6 have the same structure and are both provided with a center punch alignment process reference surface 7. The process reference surface of the cylindrical roller 1 refers to the surface to be ground of the cylindrical roller 1.

[0034] To improve the production efficiency, in the above embodiment, preferably: a dog clutch drive assembly 7 is fixed on the roller mounting mandrel 2 of the workpiece to be sanded and is integrated with it.

[0035] To further ensure that the dimensional accuracy of the processed hyperbolic roller is consistent with the design dimensions and improve the production efficiency, in the above embodiment, preferably: the inclination angle in the second step is 2.5°.

[0036] To ensure that the prepared hyperbolic roller is consistent with the design dimensions, in the above embodiment, preferably: the middle diameter of the cylindrical roller 1 in the fourth step is 0.036 mm smaller than the outer diameters of both ends of the cylindrical roller 1.

[0037] In the above embodiment, all components are products sold on the market.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A hyperbolic roller manufacturing process, characterized in that: The following steps are included: The first step is to fix the cylindrical roller (1) on the roller mounting spindle (2) to form a workpiece to be sanded; Step 2: clamping the workpiece to be sanded in the first step on the cylindrical grinder, wherein the axis of the roller mounting spindle (2) of the clamped workpiece forms an inclined angle with the axis of the main shaft of the cylindrical grinder; Step 3: Start the cylindrical grinder so that the grinding wheel of the cylindrical grinder moves left and right on the axis of the spindle of the cylindrical grinder; The fourth step is to rotate the workpiece to be sanded so that it rotates at the inclined angle described in the second step. During the rotation of the workpiece to be sanded, the outer edge of the cylindrical roller (1) contacts the outer edge of the grinding wheel for sanding until the middle diameter of the cylindrical roller (1) is smaller than the outer diameter of the two ends of the cylindrical roller (1) to form a hyperbolic roller.

2. The hyperbolic roller manufacturing process according to claim 1, characterized in that: In the second step, the two end surfaces of the roller mounting spindle (2) of the workpiece to be sanded are provided with a front reference positioning hole (3) and a rear reference positioning hole (4), and a front eccentric ejector pin (5) is provided in the front reference positioning hole (3), and the front end of the front eccentric ejector pin (5) is fixed in the spindle taper hole of the cylindrical grinding machine; A rear eccentric ejector pin (6) is arranged in the rear reference positioning hole (4), and the rear end of the rear eccentric ejector pin (6) is fixed in the tapered hole of the tailstock center spindle of the external cylindrical grinder.

3. The manufacturing process of the hyperbolic roller according to claim 2, characterized in that: After the front eccentric ejector pin (5) and the rear eccentric ejector pin (6) are installed, the worker aligns the process reference of the cylindrical roller (1) to within 0.01 mm and then respectively locks the front eccentric ejector pin (5) and the rear eccentric ejector pin (6) by means of the claw disc at the taper hole of the spindle of the external cylindrical grinder and the claw disc at the taper hole of the tailstock center shaft of the external cylindrical grinder.

4. The hyperbolic roller manufacturing process according to claim 1 or 2, characterized in that: A heart-shaped clamp transmission assembly which is integral with the roller mounting spindle (2) of the workpiece to be sanded is fixed on the spindle.

5. The hyperbolic roller manufacturing process according to claim 1, characterized in that: The tilt angle in the second step is 2.5°.

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