Contact point symmetric type double-arc raceway lead screw machining method

Abstract

The embodiment of the invention provides a contact point symmetric type double-arc raceway lead screw machining method which comprises the steps that firstly, a bar is subjected to rough turning treatment, and a first machined part is manufactured; secondly, the first machined part is subjected to thermal refining, and a second machined part is obtained; then, the second machined part continues to be subjected to first-time finish turning treatment, and a third machined part is obtained; and then, the roller path threads are machined on the third machined part. A fourth machined part is manufactured; then, the fourth machined part is sequentially subjected to heat treatment, stress treatment and straightening treatment, and a fifth machined part is obtained; then, the fifth machined part is sequentially subjected to second-time finish turning treatment and finish grinding treatment, and a sixth machined part is obtained; and finally, the sixth machined part is subjected to groove milling treatment, and therefore the double-arc raceway lead screw is finally machined and manufactured. Compared with the machining process of the raceway lead screw in the prior art, the machining method is simple in machining mode and high in efficiency on the premise that the machining quality is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of screw processing, and in particular to a method for processing a contact-point symmetrical double-arc raceway screw. Background Art

[0002] With the development of servo control technology and new energy-related technologies, electric actuators are gradually replacing hydraulic actuators in various fields due to their advantages such as positioning accuracy, efficient transmission, simple layout, and easy control. Among them, electric actuators, represented by electric cylinders, are experiencing rapid development, and demand for ball screw pairs, a functional component of electric cylinders, is increasing year by year.

[0003] The ball screw is one of the components of the ball screw pair. Figure 1 This is a schematic diagram of the ball screw, refer to Figure 1 As shown, the ball screw is a slender rod part. In the related art, the ball screw processing technology is not only long and complicated, but also has low processing efficiency. Summary of the Invention

[0004] An embodiment of the present application provides a contact point symmetrical double arc raceway ball screw processing method to solve the problem of low ball screw processing efficiency in the prior art.

[0005] The present application provides a method for machining a contact-point symmetrical double-arc raceway lead screw, comprising:

[0006] The bar material is subjected to rough turning to obtain the first workpiece;

[0007] Performing a quenching and tempering treatment on the first workpiece to obtain a second workpiece;

[0008] continuing the first finish turning process on the second workpiece to obtain a third workpiece;

[0009] Processing raceway threads on the third workpiece to obtain a fourth workpiece;

[0010] performing heat treatment, stress treatment, and straightening treatment on the fourth workpiece in sequence to obtain a fifth workpiece;

[0011] performing a second fine turning process and a fine grinding process on the fifth workpiece in sequence to obtain a sixth workpiece;

[0012] The sixth workpiece is subjected to a milling process, thereby finally processing and manufacturing the double-arc raceway lead screw.

[0013] In a feasible implementation, the diameter of the bar is 30 mm, and the machining allowances at both ends are 2 mm to 3 mm.

[0014] In a feasible implementation, the rough turning of the bar material includes:

[0015] The two ends of the bar are turned, and a machining allowance of 2mm-3mm is reserved on a single radial side, and a machining allowance of 5mm-8mm is reserved on both ends of the raceway to be machined.

[0016] In a feasible implementation, performing a quenching and tempering treatment on the first workpiece includes:

[0017] The first workpiece is heat-treated.

[0018] In a feasible implementation, processing the raceway thread on the third workpiece includes:

[0019] The third workpiece is clamped and aligned, and the raceway thread is machined on the third workpiece using a machining center, with a machining allowance of 0.4mm-0.6mm reserved.

[0020] In a feasible implementation, the fourth workpiece is subjected to heat treatment, stress treatment, and straightening treatment in sequence, including:

[0021] The raceway threads are quenched.

[0022] In a feasible implementation, the fifth workpiece is sequentially subjected to a second fine turning process and a fine grinding process, including:

[0023] The outer circle of the fifth workpiece is used as a reference for clamping and alignment, and the center holes at both ends of the fifth workpiece are fine-tuned based on the outer circle of the fifth workpiece. All parts of the second workpiece except the raceway thread are fine-turned with a margin of 0.1mm-0.2mm.

[0024] In a feasible implementation, the fifth workpiece is sequentially subjected to a second fine turning process and a fine grinding process, including:

[0025] The raceway thread is precision-turned, and a 0.15mm-0.25mm margin is retained on one side of the steel ball running area of the raceway thread.

[0026] In a feasible implementation, the fine grinding process includes:

[0027] Fine grinding the outer circle, the center, the cross sections at both ends and the bearing mounting position of the fifth workpiece;

[0028] The raceway threads are finely ground multiple times.

[0029] In a feasible implementation, the milling process on the sixth workpiece includes:

[0030] The sixth workpiece is milled to form a gear anti-rotation groove and a top thread.

[0031] The embodiment of the present application provides a contact point symmetrical double arc raceway screw processing method, first, the bar material is rough turned to obtain a first workpiece; secondly, the first workpiece is tempered to obtain a second workpiece; then the second workpiece is subjected to a first fine turning process to obtain a third workpiece; then the raceway thread is processed on the third workpiece to obtain a fourth workpiece; then, the fourth workpiece is subjected to a heat treatment, stress treatment and straightening process in sequence to obtain a fifth workpiece; then, the fifth workpiece is subjected to a second fine turning process and fine grinding process in sequence to obtain a sixth workpiece; finally, the sixth workpiece is milled to obtain the double arc raceway screw. Compared with the raceway screw processing technology in the prior art, the processing method of the present application has a simple processing method and high efficiency while ensuring the processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present application and do not constitute improper limitations on the present invention.

[0033] In the attached figure:

[0034] Figure 1 It is a schematic diagram of a ball screw;

[0035] Figure 2 This is a flow chart of a contact point symmetrical double arc raceway lead screw processing method provided in one embodiment of the present application.

[0036] Description of reference numerals:

[0037] 100- ball screw. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will provide a clear and complete description of the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0039] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0040] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0041] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0042] With the development of servo control technology and new energy-related technologies, electric actuators are gradually replacing hydraulic actuators in various fields due to their advantages such as positioning accuracy, efficient transmission, simple layout, and easy control. Among them, electric actuators, represented by electric cylinders, are experiencing rapid development, and demand for ball screw pairs, a functional component of electric cylinders, is increasing year by year.

[0043] The ball screw is one of the components of the ball screw pair. Figure 1 This is a schematic diagram of the ball screw, refer to Figure 1 As shown, the ball screw 100 is a slender rod part. In the related art, the processing technology of the ball screw 100 is not only long and complicated, but also has low processing efficiency.

[0044] In order to solve the problems of complex processing technology and low processing efficiency of ball screws in the prior art, an embodiment of the present application provides a contact point symmetrical double arc ball screw processing method. The solution provided by the embodiment of the present application will be described in detail below in conjunction with the drawings in the specification.

[0045] Figure 2This is a flow chart of a contact point symmetrical double arc raceway lead screw processing method provided in one embodiment of the present application.

[0046] Reference Figure 2 As shown, an embodiment of the present application provides a method for machining a contact point symmetrical double arc raceway lead screw, comprising:

[0047] S100: The bar material is subjected to rough turning processing to obtain the first processed part.

[0048] For example, the diameter of the bar is 30mm, the radial allowance is 0.2mm-0.3mm, and the machining allowance at both ends is 2mm-3mm. The bar is turned at both ends, leaving a 2mm-3mm machining allowance on each radial side, and a 5mm-8mm machining allowance on each end of the raceway to be machined.

[0049] S200: performing a tempering treatment on the first workpiece to obtain a second workpiece.

[0050] In some examples, the first workpiece is subjected to a tempering treatment, including heat treatment of the first workpiece, thereby changing the overall properties of the first workpiece to facilitate subsequent processing.

[0051] S300: Continue the first finishing turning process on the second workpiece to obtain a third workpiece.

[0052] Specifically, the tail of the second workpiece is clamped with four jaws, and the outer circle of the raceway part at the other end is left with a margin of 0.1mm-0.15mm, and the length direction of the raceway is not processed; the two ends of the second workpiece are precision-turned, and a margin of 1mm-2mm is left on each; the center holes at both ends are repaired based on the outer circle of the raceway of the second workpiece; the installation positions of the bearings and other parts at both ends of the screw are precision-turned, and a margin of 0.5mm-1mm is left.

[0053] S400: Processing raceway threads on the third workpiece to obtain a fourth workpiece.

[0054] Specifically, the third workpiece is clamped and aligned, and a raceway thread is machined on the third workpiece using a machining center, with a machining allowance of 0.4 mm to 0.6 mm reserved, to obtain a fourth workpiece.

[0055] S500: performing heat treatment, stress treatment and straightening treatment on the fourth workpiece in sequence to obtain a fifth workpiece.

[0056] For example, the raceway thread portion of the fourth workpiece is subjected to induction hardening, aging treatment to remove stress, and straightening treatment to ensure that the straightness thereof is within 0.2 mm.

[0057] S600: performing a second fine turning process and a fine grinding process on the fifth workpiece in sequence to obtain a sixth workpiece.

[0058] Specifically, the fifth workpiece undergoes a second finishing process, followed by a second finishing process of finishing grinding. The second finishing process includes aligning the fifth workpiece using its outer diameter as a reference, and finishing the center holes at both ends of the workpiece using its outer diameter as a reference. All parts of the second workpiece, excluding the raceway threads, are finish-turned to a margin of 0.1mm-0.2mm. The raceway threads are finish-turned to ensure a 0.15mm-0.25mm margin on each side of the ball-running area, ensuring a smooth transition between adjacent areas.

[0059] The finishing process includes finishing the outer diameter, center, end sections, and bearing mounting areas of the fifth workpiece. Specifically, the outer diameter of the raceway threads is finish-ground to meet the drawing requirements. Using the raceway thread outer diameter as a reference, the center ends are fine-finished. Each bearing mounting area and end faces are finish-ground to meet the drawing requirements. Furthermore, multiple finish grinding passes are required for the raceway threads. For example, in three finish grinding passes, the first grinding pass is 0.05mm, the second is 0.02mm, and the third is 0.01mm.

[0060] S700: performing groove milling processing on the sixth workpiece, thereby finally processing and manufacturing a double-arc raceway lead screw.

[0061] Specifically, the sixth workpiece is milled to form a gear anti-rotation groove and a top thread.

[0062] In other examples, the finished double-arc raceway screw needs to be marked and inspected again, the pitch diameter is transferred to the nut grinding station, the inspection content is completed according to the drawing, and the product is coated with anti-rust oil and put into storage for assembly.

[0063] This processing method uses precision turning to reduce the application of grinding technology, which significantly improves the processing efficiency of the ball screw and can increase the processing speed to 3 to 4 times that of the existing processing technology. In addition, due to the application of precision turning technology, the heat generated by grinding in the existing technology is greatly avoided, so that the final product quality is improved.

[0064] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on the several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the scope of protection of the present application.

[0065] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of protection of the embodiments of the present application.

Claims

1. A method for machining a contact point symmetrical double arc raceway lead screw, characterized in that: include: The bar material is subjected to rough turning to obtain the first workpiece; Performing a quenching and tempering treatment on the first workpiece to obtain a second workpiece; continuing the first finish turning process on the second workpiece to obtain a third workpiece; Processing raceway threads on the third workpiece to obtain a fourth workpiece; performing heat treatment, stress treatment, and straightening treatment on the fourth workpiece in sequence to obtain a fifth workpiece; performing a second fine turning process and a fine grinding process on the fifth workpiece in sequence to obtain a sixth workpiece; The sixth workpiece is subjected to a milling process, thereby finally processing and manufacturing the double-arc raceway lead screw.

2. The contact point symmetrical double arc raceway lead screw machining method according to claim 1, characterized in that: The diameter of the bar is 30 mm, and the machining allowances at both ends are 2 mm to 3 mm.

3. The contact point symmetrical double arc raceway lead screw machining method according to claim 1, characterized in that: The rough turning process of the bar material includes: The two ends of the bar are turned, and a machining allowance of 2mm-3mm is reserved on a single radial side, and a machining allowance of 5mm-8mm is reserved on both ends of the raceway to be machined.

4. The contact point symmetrical double arc raceway lead screw machining method according to claim 1, characterized in that: The step of performing a quenching and tempering treatment on the first workpiece includes: The first workpiece is heat-treated.

5. The contact point symmetrical double arc raceway lead screw machining method according to claim 1, characterized in that: The step of processing the raceway thread on the third workpiece includes: The third workpiece is clamped and aligned, and the raceway thread is machined on the third workpiece using a machining center, with a machining allowance of 0.4mm-0.6mm reserved.

6. The method for machining a contact point symmetrical double arc raceway lead screw according to claim 5, characterized in that: The fourth workpiece is subjected to heat treatment, stress treatment and straightening treatment in sequence, including: The raceway threads are quenched.

7. The method for machining a contact point symmetrical double arc raceway lead screw according to claim 5, characterized in that: The fifth workpiece is sequentially subjected to a second fine turning process and a fine grinding process, including: The outer circle of the fifth workpiece is used as a reference for clamping and alignment, and the center holes at both ends of the fifth workpiece are fine-tuned based on the outer circle of the fifth workpiece. All parts of the second workpiece except the raceway thread are fine-turned with a margin of 0.1mm-0.2mm.

8. The method for machining a contact point symmetrical double arc raceway lead screw according to claim 7, characterized in that: The fifth workpiece is sequentially subjected to a second fine turning process and a fine grinding process, including: The raceway thread is precision-turned, and a 0.15mm-0.25mm margin is retained on one side of the steel ball running area of the raceway thread.

9. The method for machining a contact point symmetrical double arc raceway lead screw according to claim 7, characterized in that: The fine grinding process includes: Fine grinding the outer circle, the center, the cross sections at both ends and the bearing mounting position of the fifth workpiece; The raceway threads are finely ground multiple times.

10. The method for machining a contact point symmetrical double arc raceway lead screw according to claim 1, characterized in that: The milling process on the sixth workpiece includes: The sixth workpiece is milled to form a gear anti-rotation groove and a top thread.

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