Machining method of left-handed and right-handed roller screw rod

Abstract

The invention discloses a machining method for a left-handed and right-handed roller screw rod. The machining method comprises the steps that S1, the surface of the welding position of a left-handed screw rod and a right-handed screw rod is cleaned up; s2, the position to be welded is welded through argon arc welding; s3, whether thermal deformation occurs or not is detected after welding, and if thermal deformation occurs, finish machining correction is needed; s4, calculating the central positions of the left nut and the right-handed screw; and S5, the predicted machining amount is calculated, and a left-handed and right-handed screw rod with the center position capable of being accurately controlled can be machined through turning or grinding. Due to the fact that the left-handed screw and the right-handed screw of the left-handed and right-handed roller screw are connected into a whole through welding connection, when the stroke is long, the left-handed and right-handed roller screw can normally operate even if the left-handed and right-handed roller screw falls under the influence of gravity, larger axial force can be borne, the use of a coupler is omitted through the design, the machining cost is reduced, and the machining efficiency is improved. And the production efficiency is obviously improved.

Description

Technical Field

[0001] The invention relates to the technical field of roller screw application, and in particular to a processing method for a left-right rotating roller screw. Background Art

[0002] In the field of modern machinery and automation, roller screw is a highly efficient transmission element that converts rotational motion into linear motion. It is usually composed of a main thread screw, rollers and nuts, where the rollers are arranged around the main thread screw, and the conversion from rotation to linear motion is achieved through spiral motion, achieving high-precision and high-efficiency transmission. Among them, one application of roller screw is to dock two screws with opposite spiral directions, that is, drive them through a motor to rotate the two threads in opposite directions, thereby driving the two slides to move in opposite directions to achieve opening and closing motion.

[0003] The previous design used a coupling to connect the left-hand screw and the right-hand screw. When the motor drives the left-hand screw, the left-hand screw drives the right-hand screw to rotate synchronously through the coupling. The spiral directions of the left-hand screw and the right-hand screw are opposite, so the effect of positive and negative synchronous opening and closing movement is achieved. However, because the coupling is used for connection, when a longer screw is used for connection, the connection will fall due to gravity. At this time, the coupling used for connection will be subject to radial force and cause damage to the coupling. When the load is large or when it is used to clamp materials, the coupling will be subject to a large axial force, and the coupling cannot withstand the axial force. Therefore, the previous design structure will no longer be applicable in applications with long strokes, large loads, or for clamping materials.

[0004] Therefore, we need to use welding to connect the joints between the left-hand screw and the right-hand screw, optimize and improve the welding process, and process and design a left-hand and right-hand roller screw with precisely controlled center position to meet the requirements of durable use. Summary of the invention

[0005] The purpose of the present invention is to provide a processing method for a left-handed roller screw, which solves the problem that the design of the existing left-handed roller screw is not suitable for applications with long strokes, large loads or for clamping materials, and cannot meet the durability requirements.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] A method for processing a left-handed and right-handed roller screw, characterized in that the processing method comprises the following steps:

[0008] S1. Clean the welding surface of the left-hand screw (1) and the right-hand screw (2);

[0009] S2. Welding the area to be welded by argon arc welding;

[0010] S3. Check whether there is thermal deformation after welding. If there is thermal deformation, fine processing and correction are required;

[0011] S4, calculating the center positions of the left nut (3) and the right-hand screw (2);

[0012] S5. Calculate the expected processing volume and produce a left-hand or right-hand screw with precisely controlled center position by turning or grinding.

[0013] A further improvement is that the left-handed screw is connected to a left nut via threaded engagement, and the right-handed screw is connected to a right nut via threaded engagement.

[0014] A further improvement is to place the flat surfaces of the cut edges of the left nut and the right nut flush on a flat workbench, and use a measuring tool to measure the distance between the left nut and the right nut, which is recorded as A.

[0015] A further improvement is that the calculation formula for the center position of the two nuts is:

[0016] B = A / 2;

[0017] Among them, B represents the symmetrical center position of the two nuts.

[0018] A further improvement is that the trimmed flat surface G of the left nut is used as the measurement reference, and the distance from the end surface of the blank to the G surface is measured by a measuring tool and recorded as F. The required processing amount can be obtained by the calculation formula: E=FC and recorded as E.

[0019] A further improvement is that the processing amount E is the distance required for turning or grinding, and the design requirement C size is controlled. Then, the length of D size is controlled to obtain a left-right rotating roller screw with a precisely controlled center position.

[0020] The beneficial effects of the present invention are:

[0021] (1) The left-handed and right-handed roller screws designed in the present invention are connected by welding, and the left-handed screw and the right-handed screw are connected as one. When the stroke is long, they can still operate normally even if they fall due to gravity, and can also bear a larger axial force. This design eliminates the use of a coupling, reduces processing costs, and significantly improves production efficiency.

[0022] (2) After the left and right screws of the present invention are welded, the symmetrical center position of the nut is calculated by the center line positioning method, so that the center line of the opening and closing movement of the left-handed screw and the right-handed screw can be accurately controlled. In this way, the left and right screws obtained after welding can still operate normally when subjected to axial force, and the center position of the opening and closing movement is controllable, which solves the problem that the spiral grooves of the left-handed screw and the right-handed screw must be completely aligned to achieve a completely symmetrical relationship before welding, otherwise the center line of the opening and closing movement of the left-handed screw (1) and the right-handed screw (2) will be uncontrollable, resulting in the problem that the left-handed screw (1) and the right-handed screw (2) cannot be used.

[0023] (3) The present invention calculates the distance of the processing amount E through the symmetrical center position of the nut, controls the design requirement C dimension, and then controls the length of D dimension to design a left-right rotating roller screw with a precisely controlled center position. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the overall structure of a left-right rotating roller screw proposed by the present invention;

[0025] Figure 2 This is a design idea diagram for processing a left-right rotating roller screw proposed by the present invention.

[0026] Markings in the figure: 1. left-hand screw; 2. right-hand screw; 3. left nut; 4. right nut; 5. welding point. DETAILED DESCRIPTION

[0027] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0028] This embodiment provides a method for processing a left-right rotating roller screw, and the method is implemented by the following steps:

[0029] like Figure 1As shown in , the present invention provides a structural solution of a left-handed roller screw, including a left-handed screw, a right-handed screw, a left nut and a right nut. The left-handed screw and the right-handed screw are connected by welding, and no longer need to be connected by a coupling. When this method uses a longer screw for connection, the connection will fall due to the influence of gravity. At this time, the coupling used for connection will be subject to radial force and cause damage to the coupling. When the load is large or when it is used to clamp materials, the coupling will be subject to a large axial force, and the coupling will not be able to withstand the axial force. The present invention directly solves this problem through the simple method of welding connection. The left-handed screw and the right-handed screw are connected as one, so that when the stroke is long, they can operate normally even if they fall due to the influence of gravity, and can also bear a larger axial force.

[0030] like Figure 2 As shown in the figure, the specific idea of ​​the structural design of a left-right rotating roller screw provided by the present invention is to find the symmetrical center position of the nut at the welding point, control the design requirement C dimension by processing the distance at E, and then control the length of D dimension to obtain a left-right rotating roller screw with a precisely controlled center position.

[0031] The specific steps are as follows: 1. Align the flat surfaces of the cut edges of the left nut and the right nut and place them flat on a flat workbench. Use a measuring tool to measure the distance between the left nut and the right nut and record it as A. 2. The value of B can be obtained by calculating A / 2. At this time, B is the symmetrical center of the two nuts. 3. Using the G surface as the measurement reference, use a measuring tool to measure the distance F from the end face of the blank to the G surface, FC (C is the design requirement, obtained from the design drawing) to obtain the required processing amount E.

[0032] Through the above method, a left-hand screw with a precisely controlled center position can be processed. Because the screw is connected by welding, the left-hand screw and the right-hand screw are connected by welding.

[0033] The connection is integrated, so that when the stroke is long, it can still operate normally even if it falls due to gravity, and it can also bear greater axial force.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for processing a left-right rotating roller screw, characterized in that: The processing method comprises the following steps: S1. Clean the welding surface of the left-hand screw (1) and the right-hand screw (2); S2. Welding the area to be welded by argon arc welding; S3. Check whether there is thermal deformation after welding. If there is thermal deformation, fine processing and correction are required; S4, calculating the center positions of the left nut (3) and the right-hand screw (2); S5. Calculate the expected processing volume and produce a left-hand or right-hand screw with precisely controlled center position by turning or grinding.

2. A method for processing a left-right rotating roller screw according to claim 1, characterized in that: The left-handed screw rod (1) is connected to a left nut (3) via threaded engagement, and the right-handed screw rod (2) is connected to a right nut (4) via threaded engagement.

3. The method for processing a left-right rotating roller screw according to claim 2, characterized in that: The left nut (3) and the right nut (4) are placed flat on a flat workbench with their respective cut edges aligned, and a measuring tool is used to measure the distance between the left nut (3) and the right nut (4), which is recorded as A.

4. The method for processing a left-right rotating roller screw according to claim 1, characterized in that: The calculation formula for the center position of the two nuts is: B = A / 2; Among them, B represents the symmetrical center position of the two nuts.

5. The method for processing a left-right rotating roller screw according to claim 1, characterized in that: The trimmed flat surface G of the left nut (3) is used as a measurement reference, and a measuring tool is used to measure the distance from the end surface of the blank to the G surface, which is recorded as F. The required processing amount can be obtained by calculating the formula: E=FC, which is recorded as E.

6. A method for processing a left-right rotating roller screw according to claim 5, characterized in that: The processing amount E is the distance required for turning or grinding. By controlling the design requirement C size and then controlling the length of D size, a left-right rotating roller screw with a precisely controlled center position can be obtained.

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