Machining method for internal spline of connecting frame for aviation

Abstract

The invention relates to an aviation connecting frame internal spline machining method, an internal spline and a flat groove located in the outer side of the internal spline are arranged on a connecting frame, and the symmetry degree of the flat groove relative to the tooth groove center of internal teeth of the internal spline is 0.05; a broaching tool is adopted for machining the internal spline, a positioning flat square is arranged on a front handle of the broaching tool, and the symmetry degree of the positioning flat square relative to the center of tool teeth of the broaching tool is 0.005. When the internal spline is machined, one end of the broaching positioning tool is clamped into the flat groove of the connecting frame and makes surface contact with the flat groove, the other end of the broaching positioning tool clamps the positioning flat square of the broach and makes surface contact with the positioning flat square, the center of the flat groove and the center of the positioning flat square are collinear, and therefore conversion between the flat groove and the internal tooth positioning datum is achieved through the positioning flat square. And the symmetry degree of the flat groove relative to the inner tooth groove center of the inner spline is ensured. By means of the method, the problem that in traditional machining, the precision of the internal spline is insufficient can be effectively solved, the machining efficiency can be improved, the operation steps are simplified, and the assembly precision and reliability of parts are guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of spline processing and relates to a method for processing splines in an aviation connecting frame. Background Art

[0002] In high-precision fields such as aviation and aerospace, the internal spline processing of parts such as connecting frames requires extremely high precision. Splines are a common connection method in mechanical parts, especially in connection situations that bear large loads or require high rigidity. The processing accuracy of splines directly affects the assembly accuracy of parts and the operating stability of the system. For parts with position requirements between the inner hole teeth and other part planes, the processing of splines is particularly complicated. Existing internal spline processing usually uses involute spline broaches for processing. This method has certain processing advantages, but it also has some shortcomings. Especially in the aviation field, it is often difficult to meet the strict requirements for accuracy and symmetry.

[0003] The most widely used internal spline processing method currently is to use an involute spline broach to cut the internal spline teeth. This method is simple to operate, can quickly complete spline processing, and is suitable for mass production. However, this method is difficult to control the accuracy, especially during the processing, the symmetry of the internal spline and the relative position relationship between the center of the internal tooth and the plane of other parts of the part are often difficult to effectively guarantee. Summary of the invention

[0004] In view of this, the object of the present invention is to solve the above-mentioned problem and provide a method for processing splines in an aviation connecting frame.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A method for processing internal splines of a connecting frame for aviation, wherein the connecting frame is provided with an internal spline and a flat groove located on the outside of the internal spline, and the symmetry of the flat groove relative to the center of the internal tooth groove of the internal spline is 0.05; a broach is used to process the internal spline, and a positioning flat square is provided on the front handle of the broach, and the symmetry of the positioning flat square relative to the center of the tooth of the broach is 0.005; when processing the internal spline, one end of the broaching positioning tool is clamped into the flat groove of the connecting frame and contacts with the flat groove surface, and the other end is clamped on the positioning flat square of the broach and contacts with the positioning flat surface, so that the center of the flat groove is in line with the center of the positioning flat square, thereby realizing the conversion of the flat groove and the internal tooth positioning reference through the positioning flat square, and ensuring the symmetry of the flat groove relative to the center of the internal tooth groove of the internal spline.

[0007] Furthermore, a positioning circle is provided on the front handle of the broach to center the inner hole of the connecting frame.

[0008] Furthermore, before the broaching is started, the broach and the connecting frame are aligned by means of a broaching positioning tool, and the broaching positioning tool is taken out after the alignment is completed.

[0009] The beneficial effects of the present invention are:

[0010] 1. The present invention adopts a combination of positioning flat square and broaching positioning tooling to keep the flat groove and the center of the internal tooth groove of the internal spline in the same line, thereby ensuring that the symmetry of the flat groove relative to the center of the internal tooth groove of the internal spline reaches 0.05, thereby effectively solving the problem that the traditional method cannot ensure the symmetry between the internal spline teeth and the plane, and ensuring the high precision of the parts.

[0011] 2. The traditional internal spline processing method usually requires multiple positioning steps and requires repeated adjustment of the positioning reference. The operation is complicated and prone to errors. By using the broaching positioning tool and the positioning flat square, one end of the tool is inserted into the flat groove of the connecting frame and contacts the flat groove surface, and the other end contacts the positioning flat surface, so that the center of the flat groove and the center of the positioning flat square are collinear, simplifying the processing positioning process. The application of the broaching positioning tool makes the processing process more convenient, reduces the adjustment time of the operator, and improves the processing efficiency.

[0012] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0014] Figure 1 The figure is a schematic diagram of the processing method of the internal spline of the aviation connecting frame in the present invention.

[0015] Figure 2 This is a blank diagram of the connecting frame in the present invention.

[0016] Figure 3 This is a finished product diagram of the connecting frame in the present invention.

[0017] Figure 4 It is a schematic diagram of the broach in the present invention.

[0018] Figure numerals: 1-connecting frame; 2-broach; 3-broaching positioning tool. DETAILED DESCRIPTION

[0019] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0020] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0021] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0022] See also Figures 1 to 4 A method for processing an internal spline of an aviation connecting frame 1, wherein the connecting frame 1 is provided with an internal spline and a flat groove located outside the internal spline, and the symmetry of the flat groove relative to the center of the internal tooth groove of the internal spline is 0.05 mm. The processing process of the method is as follows:

[0023] 1. First process as Figure 2 The blank of the connecting frame 1 shown;

[0024] 2. Customized broach 2, broach such as Figure 4 As shown, a positioning flat square is provided on the front handle of the broach 2, and the symmetry of the positioning flat square relative to the center of the teeth of the broach 2 is 0.005mm. A positioning circle is provided on the front handle of the broach 2 for centering the inner hole of the connecting frame 1.

[0025] 3. Use broach 2 to process internal splines. When processing internal splines, first insert one end of the broaching positioning tool 3 into the flat groove of the connecting frame 1 and contact the flat groove surface; the other end clamps the positioning flat square of broach 2 and contacts the positioning flat surface. In this way, the center of the flat groove is in line with the center of the positioning flat square, and the positioning flat square is used to realize the conversion of the positioning reference of the flat groove and the internal tooth, thereby ensuring the symmetry of the flat groove relative to the center of the internal tooth groove of the internal spline.

[0026] Before the broaching is started, the broaching positioning tool 3 is used to align the broach 2 with the connecting frame 1. After the alignment is completed, the broaching positioning tool 3 can be taken out to start the broaching process.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A method for processing internal splines of an aviation connecting frame, characterized in that: The connecting frame is provided with an internal spline and a flat groove located on the outside of the internal spline, and the symmetry of the flat groove relative to the center of the internal tooth groove of the internal spline is 0.05; a broach is used to process the internal spline, and a positioning flat square is provided on the front handle of the broach, and the symmetry of the positioning flat square relative to the center of the broach tooth is 0.005; when processing the internal spline, one end of the broaching positioning tool is inserted into the flat groove of the connecting frame and contacts with the flat groove surface, and the other end is clamped with the positioning flat square of the broach and contacts with the positioning flat surface, so that the center of the flat groove is collinear with the center of the positioning flat square, thereby realizing the conversion of the flat groove and the internal tooth positioning reference through the positioning flat square, and ensuring the symmetry of the flat groove relative to the center of the internal tooth groove of the internal spline.

2. The method for processing internal splines of an aviation connecting frame according to claim 1, characterized in that: A positioning circle is provided on the front handle of the broach to center the inner hole of the connecting frame.

3. The method for processing internal splines of an aviation connecting frame according to claim 1, characterized in that: Before starting the broaching, the broach and the connecting frame are aligned by the broaching positioning tool, and the broaching positioning tool is taken out after the alignment is completed.

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