A method for processing helical blades

Abstract

This invention discloses a method for processing helical blades, belonging to the field of machining technology, including the following steps: collecting required parameters for the helical blades; determining the blank processing parameters and mandrel processing parameters based on the required parameters, and designing a positioning reinforcement process and a forming process; performing preliminary processing on the blank according to the blank processing parameters; processing the mandrel according to the mandrel processing parameters; clamping the pre-processed blank and mandrel on a processing device; strengthening the positioning in the middle using a positioning reinforcement process; and processing the non-blade area using the processing device according to the forming process to obtain the helical blade. This invention provides a method for processing helical blades that can achieve stable clamping during the processing of helical blades, ensure the accuracy of the processing, and effectively avoid deformation of the processed part during the processing, thereby providing effective protection for the weight of the finished helical blade and significantly reducing production costs.

Description

Technical Field

[0001] This invention belongs to the field of machining technology, and specifically relates to a method for machining helical blades. Background Technology

[0002] With the rapid development of the national economy and the fast progress of social construction, modern high-end manufacturing, as a key pillar of social development and the national economy, has also entered a period of rapid development. As a device frequently used in modern manufacturing and infrastructure construction, spiral blades have a wide range of application prospects.

[0003] In existing technologies, especially for modified helical blades, due to their special helical structure, the processing of individual helical blades often causes deformation during the actual machining process. This is especially true for helical blades with thinner walls, which are more prone to deformation during clamping and milling. This directly affects the quality of the finished helical blades, resulting in helical blades that do not meet the required quality standards, wasting materials, and increasing production costs. Summary of the Invention

[0004] In view of one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides a method for processing helical blades, which can achieve stable clamping during the processing of helical blades, ensure the accuracy of the processing of helical blades, and effectively avoid deformation of the processed parts during the processing of helical blades, thereby providing effective protection for the weight of the finished product, improving the processing efficiency of helical blades, and significantly reducing the production cost of helical blades.

[0005] To achieve the above objectives, the present invention provides a method for processing helical blades, comprising the following steps:

[0006] S1. Collect the required parameters for the spiral blades;

[0007] S2. Determine the blank processing parameters and mandrel processing parameters according to the required parameters, and design the positioning and reinforcement process and the forming process;

[0008] S3. Based on the billet processing parameters, the billet is divided into blade areas and non-blade areas with alternating circumferential intervals, and the billet is pre-processed to obtain a pre-processed billet.

[0009] S4. Process the mandrel according to the mandrel processing parameters;

[0010] S5. Assemble and fix the pre-processed blank and the mandrel, and clamp them onto the processing equipment.

[0011] S6. A positioning reinforcement process is used to strengthen the positioning connection between the pre-processed blank and the mandrel in the middle.

[0012] S7. The non-blade area is processed using processing equipment according to the forming process to obtain the helical blade.

[0013] As a further preferred embodiment of the present invention, the pre-processed blank is cylindrical, and frustums are provided at both ends of the outer wall for positioning and clamping the pre-processed blank.

[0014] As a further preferred embodiment of the present invention, the mandrel is sleeved in the through hole of the processed blank, and the contact surface between the two is clearance fit.

[0015] As a further preferred embodiment of the present invention, step S6 includes the following steps:

[0016] S61. According to the positioning enhancement process, determine the drilling position on the preliminary processed blank;

[0017] S62. A plurality of positioning screw holes are made at the drilling positions of the pre-processed blank and the mandrel;

[0018] S63. The positioning screw holes pass through the respective positioning screw holes provided in the preliminary processed blank and the mandrel.

[0019] As a further preferred embodiment of the present invention, at least one positioning screw hole is provided in each of the blade regions.

[0020] As a further preferred embodiment of the present invention, the processing equipment is a CNC milling machine.

[0021] As a further preferred embodiment of the present invention, after the preliminary processed blank and the mandrel are assembled, one end of the mandrel is fixed by a three-jaw chuck, and the other end is positioned by a closed-end joint with indexing head and tail center.

[0022] As a further preferred embodiment of the present invention, the outer diameter of the end cap and the outer diameter of the pre-processed blank are in clearance fit.

[0023] As a further preferred embodiment of the present invention, when the pre-processed blank and the mandrel are clamped on the processing equipment, a lever dial indicator is used to calibrate the axial straightness and circular runout of the fixture.

[0024] As a further preferred embodiment of the present invention, the thickness of the non-blade region after the forming process is between 0.15 mm and 0.20 mm.

[0025] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0026] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include:

[0027] (1) The present invention provides a method for processing helical blades, which accurately designs and divides the blanks according to the required parameters of the helical blades and designs the mandrel accordingly. This not only enables the accurate processing of multiple helical blades simultaneously, but also ensures a stable fit between the preliminary processed blanks and the mandrel. While improving processing efficiency, it also ensures that the preliminary processed blanks will not deform during the processing, thereby improving the forming quality of the helical blades. Furthermore, by designing a positioning reinforcement process, the processing strength between the preliminary processed blanks and the mandrel can be effectively strengthened, effectively preventing deformation of the processed parts during the processing of the helical blades. This provides an effective guarantee for the weight of the finished product, improves the processing efficiency of the helical blades, and significantly reduces the production cost of the helical blades.

[0028] (2) A method for processing a spiral blade according to the present invention enhances the connection strength between the pre-processed blank and the mandrel by using a clearance fit between the inner surface of the pre-processed blank and the outer wall surface of the mandrel, thereby achieving stable transmission between the mandrel and the pre-processed blank. Furthermore, by using the frustums at both ends of the axial direction of the pre-processed blank and the three-jaw chuck, end cap, and indexing head and tail center located at both ends, stable transmission is achieved during the processing of the pre-processed blank, thereby ensuring accurate and rapid processing of the blank and improving the processing efficiency and forming accuracy of the spiral blade.

[0029] (3) The processing method of the spiral blade in this invention is simple, reliable, and widely applicable. It achieves stable support for the thin-walled spiral blade blank by using a mandrel positioning method, which effectively improves the structural rigidity of the cylindrical preliminary processing blank and avoids deformation of the finished spiral blade. Furthermore, by using chucks and end caps set at both ends of the blank to effectively achieve clamping and positioning, and by setting positioning bolts between the mandrel and the preliminary processing blank, it is further ensured that the thin-walled material will not deform during actual processing, thus providing an effective guarantee for the forming accuracy of the spiral blade. It has excellent economic benefits and promotional value. Attached Figure Description

[0030] Figure 1 This is a flowchart of a method for processing a spiral blade according to the present invention;

[0031] Figure 2 This is a front view of the shaft core structure of a machining method for a helical blade according to the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0033] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] Example:

[0038] like Figures 1-2 As shown, the processing method of the helical blade in the preferred embodiment of this application can achieve stable clamping during the processing of the helical blade, ensure the accuracy of the processing, and effectively avoid deformation of the processed part during the processing, thereby providing effective protection for the weight of the finished product, improving the processing efficiency of the helical blade, and significantly reducing the production cost of the helical blade.

[0039] Specifically, such as Figure 1 The steps shown are as follows:

[0040] S1. Collect the required parameters for the spiral blades;

[0041] S2. Determine the blank processing parameters and mandrel processing parameters according to the required parameters, and design the positioning and reinforcement process and the forming process;

[0042] S3. Based on the billet processing parameters, the billet is divided into blade areas and non-blade areas with alternating circumferential intervals, and the billet is pre-processed to obtain a pre-processed billet.

[0043] S4. Machin the mandrel according to the mandrel machining parameters;

[0044] S5. Assemble and fix the pre-processed blank and mandrel, and then clamp them onto the processing equipment.

[0045] S6. A positioning enhancement process is adopted to strengthen the positioning connection between the pre-processed blank and the mandrel in the middle.

[0046] S7. Using processing equipment, process the non-blade areas according to the forming process to obtain the helical blade.

[0047] Furthermore, in a preferred embodiment of this application, in step S1, the required parameters of the helical blade include the profile dimensions of the helical blade (length, width, thickness, curve shape, machining accuracy, etc.).

[0048] Further preferably, in the preferred embodiment of this application, in step S2, the blank processing parameters determined according to the required parameters are determined by the length, width, and curve shape of the helical blades to determine the blank size, while the mandrel processing parameters are determined by the curve shape and thickness of the helical blades to determine the axial length and outer diameter of the mandrel. The design positioning reinforcement process determines the position of the positioning reinforcement on the blank based on the distribution of the helical blades on the outer peripheral wall of the blank, and determines the specific steps for the positioning reinforcement. The forming processing process is determined by the distribution and thickness of the blank to specifically determine the blank processing steps, such as multiple milling, roughing, and finishing, to ensure the accurate forming of the helical blades.

[0049] More specifically, in a preferred embodiment of this application, in step S3, the blank is divided into blade areas and non-blade areas that are alternately arranged circumferentially based on the blank processing parameters. This design is adopted to enable the rapid processing of multiple helical blades simultaneously on the same blank, making full use of the blank and effectively reducing production costs while improving production efficiency. Preferably, the division of the blade area on a single blank is determined by the circumference of the blank and the width of the helical blade.

[0050] Furthermore, in a preferred embodiment of this application, the preliminary processed blank is a cylindrical structure, and the blank can be a cylindrical structure. The preliminary processed blank with a cylindrical structure is then obtained by cutting. The blank can also be a plate, which is formed into a cylindrical structure by rolling or by casting. Any method that can form a preliminary processed blank with a cylindrical structure can achieve this solution, and will not be elaborated here.

[0051] Further preferably, in a preferred embodiment of this application, the outer wall surfaces on both sides of the pre-processed blank are provided with annular frustums, similar to a flange structure, to assist in the stable clamping of the pre-processed blank.

[0052] More specifically, in the preferred embodiment of this application, since the preliminary processing blank has a low structural thickness in order to achieve the forming of a thin-walled helical blade, a mandrel is provided in the inner hole of the preliminary processing blank to enhance the rigidity of the entire preliminary processing blank and avoid the problem of structural deformation of the preliminary processing blank during the forming process, thereby effectively ensuring the processing quality of the helical blade.

[0053] Preferably, the inner wall surface of the pre-processed blank and the outer wall surface of the mandrel are fitted with a clearance fit, so that the mandrel can stably support the inner diameter of the pre-processed blank, improve the processing rigidity of the entire pre-processed blank, and also facilitate the fixation of the pre-processed blank.

[0054] Furthermore, in a preferred embodiment of this application, the processing equipment used in step S3 is a CNC milling machine. Preferably, after the mandrel is loaded into the pre-processed blank, one end of its axial direction is fixed by a three-jaw chuck, and the other end is positioned by a blind end and indexing head and tail centers, thereby ensuring the stability of the pre-processed blank during the forming process. More preferably, the inner wall surface of the blind end and the outer wall surface of the pre-processed blank are in clearance fit.

[0055] Furthermore, in order to further improve the machining accuracy, in a preferred embodiment of this application, when positioning the two ends of the machining blank, a lever dial indicator is used to calibrate the axial straightness and circular runout of the fixture, thereby ensuring the accuracy of the preliminary machining blank during the forming process and improving the machining accuracy of the spiral blade.

[0056] Furthermore, in a preferred embodiment of this application, step S6 includes the following steps:

[0057] S61. According to the positioning enhancement process, determine the drilling position on the preliminary processed blank;

[0058] S62. A plurality of positioning screw holes are made at the drilling positions of the pre-processed blank and the mandrel;

[0059] S63. The positioning screw holes pass through the respective positioning screw holes provided in the preliminary processed blank and the mandrel.

[0060] More preferably, such as Figure 2 As shown in the preferred embodiment of this application, an annular boss is provided circumferentially on the outer wall of the mandrel at the position corresponding to the positioning screw hole, to facilitate the setting of the positioning screw hole. Preferably, an annular boss is provided on the outer peripheral wall of one end of the mandrel for preliminary machining of the blank at the upper limit in the axial direction.

[0061] Furthermore, in a preferred embodiment of this application, at least one positioning screw hole is provided on each blade area, so that when milling non-blade areas, deformation of the blade area due to the milling process can be avoided, thereby improving the machining accuracy of the helical blade.

[0062] Preferably, the drilling location is provided with several positioning screw holes. This is achieved by modeling the holes using CAD / CAM drawing and machining software such as Mastercam, and then using Mastercam automatic programming software to create machining programs for multiple M4 threaded holes. After the program is written, tool mounting, coordinate measurement, program transfer, and machine machining of the threaded holes can begin. More preferably, the positioning bolts conform to GB / T818 M4×6.

[0063] Furthermore, in a preferred embodiment of this application, during the forming process, the preliminary processing blank in the non-blade area is reserved with a thickness of not less than 0.15 mm and not more than 0.20 mm, thereby ensuring that the entire preliminary processing blank has good clamping and processing strength throughout the forming process.

[0064] Further preferably, in the preferred embodiment of this application, the forming process includes roughing and finishing, which sequentially mill the non-blade area, and after the milling of the non-machined area is completed, the truncated cones at both ends of the pre-machined blank are removed by turning, and then the positioning bolts are removed, the pre-machined blank is taken off, and the non-blade area is removed to obtain the helical blade.

[0065] This invention discloses a method for processing helical blades. The process is simple, highly reliable, and widely applicable. It employs a mandrel positioning method to provide stable support for the thin-walled helical blade blank, effectively improving the structural rigidity of the cylindrical preliminary blank and preventing deformation of the finished helical blade. Furthermore, the use of chucks at both ends of the blank, along with end caps and indexing heads and tail centers, effectively achieves clamping and positioning. The positioning bolts between the mandrel and the preliminary blank further ensure that the thin-walled material will not deform during actual processing, providing effective assurance for the forming accuracy of the helical blade. This method offers excellent economic benefits and has significant potential for widespread application.

[0066] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method of machining a helical vane, characterized by, The method comprises the following steps: S1, collecting required parameters of the spiral blade; S2, determining blank processing parameters and mandrel processing parameters according to the required parameters, and designing a positioning enhancement process and a forming processing process; S3, dividing the blank into blade areas and non-blade areas which are alternately arranged in a circumferential direction according to the blank processing parameters, and performing preliminary processing on the blank to obtain a preliminarily processed blank; S4, processing the mandrel according to the mandrel processing parameters; S5, assembling and fixing the preliminarily processed blank and the mandrel, and clamping them on a processing equipment, wherein one end of the preliminarily processed blank and the mandrel is fixed by a three-jaw chuck, and the other end is positioned by a plug cooperating with a dividing head tail center; S6, enhancing the connection between the preliminarily processed blank and the middle part of the mandrel by using the positioning enhancement process; S7, processing the non-blade areas according to the forming processing process by using the processing equipment to obtain the spiral blade; The step S6 comprises the following steps: S61, determining a drilling position on the preliminarily processed blank according to the positioning enhancement process; S62, opening a plurality of positioning screw holes at the drilling position of the preliminarily processed blank and the mandrel, and arranging at least one positioning screw hole in each blade area; S63, positioning the screw through each positioning screw hole arranged in the preliminarily processed blank and the mandrel.

2. The method of machining a helical vane according to claim 1, wherein, The preliminarily processed blank is in a cylindrical shape, and a circular truncated cone is arranged at both ends of the outer wall for positioning and clamping the preliminarily processed blank.

3. The method of machining a helical vane according to claim 2, wherein, The mandrel is sleeved in the through hole of the processing blank, and the contact surface of the two is in a clearance fit.

4. The method of machining a helical vane according to any one of claims 1-3, wherein, The processing equipment is a numerical control milling equipment.

5. The method of machining a helical vane according to claim 4, wherein, The outer diameter of the plug and the preliminarily processed blank is in a clearance fit.

6. The method of machining a helical vane according to claim 5, wherein, When the preliminarily processed blank and the mandrel are clamped on the processing equipment, a lever dial indicator is used to find the axial straightness and circular runout of the clamp.

7. The method of machining a helical vane according to any one of claims 1-3, 5, wherein, The thickness of the non-blade area after the forming processing process is not less than 0.15 mm and not more than 0.20 mm.

Images