Method and tooling for making a belt screw

Abstract

The application relates to a manufacturing method and manufacturing tool of a belt spiral, and the manufacturing method comprises the following steps: processing a main shaft into a semi-finished product main shaft; processing one end of a spoke into a finished product end; placing the semi-finished product main shaft on the manufacturing tool; fixing and welding each semi-finished product spoke of a first group through a positioning structure; rotating the main shaft by 90 degrees; fixing and welding each semi-finished product spoke of a second group through the positioning structure; milling notches of the semi-finished product spokes of the second group; rotating the main shaft by 90 degrees; milling notches of the semi-finished product spokes of the first group; positioning the spiral piece and the corresponding notches, and welding the spiral piece; and finishing the semi-finished product main shaft into a finished product main shaft. During welding, the manufacturing tool is used for positioning and clamping, the accuracy of spoke positioning is ensured, thermal deformation in the welding process is reduced, the welding efficiency and quality can be improved. After the semi-finished product spokes are welded, the notches are uniformly milled, the consistency of the angle directions of the notches is ensured, and the cooperation precision with the spiral piece is improved.

Description

Technical Field

[0001] This invention relates to the field of spiral manufacturing technology, specifically to a method and tooling for manufacturing a ribbon spiral. Background Technology

[0002] Belt screws are used for feeding high-temperature filamentation machines, where high stability and uniformity of feeding are required, and the equipment operates at high speeds. Therefore, stringent requirements are placed on the manufacturing precision of the belt screws. To meet the demands of these working conditions, the structure of a belt screw is more complex than that of a conventional screw. It features narrower double helical blades on the outside and a main shaft inside, connected by spokes arranged around the circumference of the main shaft. This makes manufacturing more difficult and ensures higher precision. The belt screw is installed at one end, without a fixed positioning mechanism, allowing for high-speed rotation in a cantilevered state, thus requiring high dynamic balance. Summary of the Invention

[0003] The purpose of this invention is to provide a method and tooling for manufacturing a ribbon spiral, so as to improve manufacturing efficiency while ensuring manufacturing accuracy.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A method for manufacturing a ribbon spiral includes the following steps:

[0006] (1) The machining spindle is a semi-finished spindle;

[0007] (2) The end of the spoke that is welded to the semi-finished spindle is processed into the finished end, and the spoke is a semi-finished spoke;

[0008] (3) Place the semi-finished spindle on the manufacturing fixture. The semi-finished spokes of the first group are fixed by the positioning structure, and the finished end of the semi-finished spoke is in contact with the outer circle of the semi-finished spindle. Weld the finished end of the semi-finished spoke to the semi-finished spindle.

[0009] (4) The main shaft rotates 90 degrees, and each semi-finished spoke in the second group is fixed by the positioning structure, so that the finished end of the semi-finished spoke is in contact with the outer circle of the semi-finished main shaft, and the finished end of the semi-finished spoke is welded to the semi-finished main shaft.

[0010] (5) Mill the other end of the semi-finished spokes of the second group to create a notch;

[0011] (6) Rotate the main shaft 90 degrees and mill the other end of the semi-finished spokes of the first group to create a notch;

[0012] (7) Remove the semi-finished spindle from the tooling, position the processed spiral blades with the corresponding notches, and weld the spiral blades;

[0013] (8) The semi-finished spindle is a finished spindle.

[0014] Furthermore, the finished end is a concave arc end, and the curvature of the concave arc end can fit with the outer circle of the semi-finished product spindle.

[0015] Furthermore, the semi-finished spokes of the first group are arranged in two rows, with the two rows spaced 180 degrees apart; the semi-finished spokes of the second group are also arranged in two rows, with the two rows spaced 180 degrees apart.

[0016] Furthermore, in step (4), the positioning holes on the tooling are used to position the partially welded spokes in step (3), and the downward-facing semi-finished spokes are inserted into the positioning holes.

[0017] Furthermore, in step (5), the tooling and the semi-finished spindle on it are installed as a whole onto a milling machine, and the milling machine is used to mill a notch at the other end of the semi-finished spoke.

[0018] Furthermore, vibration aging treatment is performed after welding in step (7).

[0019] Further, in step (8), the semi-finished spindle is precision machined and the mounting end of the semi-finished spindle is milled to obtain the finished spindle, and the outer diameter of the spiral blade is finished.

[0020] Further, dynamic balancing is performed after step (8).

[0021] Furthermore, the manufacturing fixture for implementing the above-mentioned method for manufacturing the ribbon spiral includes a base, a slot on the base for supporting the semi-finished spindle, and positioning slots and pressure plates on both sides of the slot on the base. The positioning slots are used to position the semi-finished spokes, and the pressure plates are used to press the semi-finished spokes.

[0022] Furthermore, the base is provided with several positioning holes, which are arranged vertically for inserting the semi-finished spokes that have been welded onto the semi-finished spindle.

[0023] The beneficial effects of this invention are:

[0024] When welding semi-finished spokes to the semi-finished spindle, tooling is used for positioning and clamping to ensure accurate spoke positioning, reduce thermal deformation during welding, and facilitate welding operations, thereby improving welding efficiency and quality. After all semi-finished spokes are welded, they are uniformly machined, with notches milled at the ends to ensure consistency in the angle and direction of each notch. The propeller blades and spoke notches fit tightly, ensuring consistency in subsequent welding.

[0025] Furthermore, after the double helix blades and spokes are welded together, a weight is added to the back surface of the weld for dynamic balancing. This not only does not affect the stable operation of the belt screw, but also greatly improves the efficiency of dynamic balancing. Attached Figure Description

[0026] Figure 1 This is a structural view (finished product) of a ribbon spiral according to the present invention;

[0027] Figure 2 This is a structural schematic diagram of a semi-finished spindle;

[0028] Figure 3 This is a structural diagram of a semi-finished spoke;

[0029] Figure 4 This is an assembly view of the belt spiral on the manufacturing fixture (the notches of the spokes have not yet been machined).

[0030] The names corresponding to each mark in the diagram:

[0031] 1. Main shaft; 2. Spokes; 21. Notch; 3. Spiral blade; 4. Semi-finished main shaft; 5. Semi-finished spokes; 51. Concave arc end; 6. Base; 61. Positioning groove; 62. Pressure plate; 63. Positioning hole; 64. Stud. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0033] To facilitate understanding of the manufacturing method of this invention, the structure of the ribbon spiral is briefly described as follows: Figure 1 As shown, it includes a main shaft, spokes, and double helical blades. The end of the spoke that mates with the helical blades has a notch.

[0034] A method for manufacturing a ribbon spiral includes the following steps:

[0035] (1) Machining the spindle into a semi-finished spindle; leaving a margin after rough machining the mounting end, such as... Figure 2 As shown.

[0036] (2) The end of the spoke that is welded to the semi-finished spindle is machined into a finished end. The finished end is a concave arc end, and the curvature of the concave arc end can fit tightly with the outer circle of the semi-finished spindle. At this time, the spoke is a semi-finished spoke, such as... Figure 3 As shown.

[0037] (3) Place the semi-finished spindle on the manufacturing fixture. The semi-finished spokes of the first group are fixed by the positioning structure, so that the finished ends of the semi-finished spokes fit against the outer circle of the semi-finished spindle. Weld the finished ends of the semi-finished spokes to the semi-finished spindle. In this invention, the semi-finished spokes are divided into two groups. The semi-finished spokes of the first group are arranged in two rows, with four in each row and spaced apart along the spindle direction. The two rows are spaced 180 degrees apart.

[0038] (4) Figure 4As shown, the main shaft rotates 90 degrees, and the semi-finished spokes of the second group are fixed by the positioning structure, so that the finished end of the semi-finished spokes fits against the outer circle of the semi-finished main shaft. Then, the finished end of the semi-finished spokes is welded to the semi-finished main shaft. The semi-finished spokes of the second group are distributed in two rows, with a 180-degree interval between the two rows, five in each row and spaced apart along the main shaft direction. The semi-finished spokes are placed horizontally in the positioning groove and pressed by the pressure plate. Before welding, the positioning holes on the tooling are used to position the welded semi-finished spokes in step (3). The downward-facing semi-finished spokes (i.e., one row in the first group) are inserted into the positioning holes to ensure the relative positions of the semi-finished spokes of the first and second groups.

[0039] (5) Mill the other end of the second group of semi-finished spokes to create a notch. In this step, the tooling and the semi-finished spindle on it are installed onto the milling machine. The milling machine is used to mill the notch at the other end of the semi-finished spoke to ensure the consistency of the notch angle and direction, thereby ensuring a tight fit with the double helix blade. (6) Rotate the spindle 90 degrees and mill the other end of the first group of semi-finished spokes to create a notch. At this point, all the semi-finished spokes have been processed into finished spokes.

[0040] (7) Remove the semi-finished spindle from the tooling, position the pre-machined spiral blades and the notches of the finished spokes, and then weld the spiral blades. The spiral blades are double spiral blades. After welding, perform vibration aging treatment.

[0041] (8) The semi-finished spindle is a finished spindle.

[0042] According to the design dimensions, the semi-finished spindle is precision machined and the mounting end of the semi-finished spindle is milled to obtain the finished spindle, and the outer diameter of the spiral blade is then machined.

[0043] (9) Finally, dynamic balancing is performed. Weight is added to the back surface of the blade and spoke welding joint to perform dynamic balancing.

[0044] The tooling used to implement the above-described method for manufacturing the ribbon spiral, such as... Figure 4 As shown, it includes a base with a slot. The slot is a semi-circular arc groove with an arc that matches the outer diameter of the supported part of the semi-finished spindle, and is used to support the semi-finished spindle so that it is placed horizontally.

[0045] The base has positioning slots and pressure plates on both sides of the slot. The positioning slots are arc-shaped and used to position the semi-finished spokes. The pressure plates are used to press the semi-finished spokes. Several pressure plates and positioning slots are provided, sufficient to simultaneously press the first or second group of semi-finished spokes. Each side has more than five positioning slots. The positioning slots supporting the first group of semi-finished spokes are different from those supporting the second group. Studs are threaded through the pressure plates and fixed to the base. Nuts are attached to the studs; tightening or loosening the nuts allows the pressure plates to be tightened or loosened. Loosening the nuts allows the pressure plates to rotate, enabling two positioning slots to work with one pressure plate.

[0046] The base has several positioning holes, which are vertically oriented to allow the semi-finished spokes already welded to the semi-finished spindle to be inserted. Here, "vertically oriented" means that the center line of the hole is vertical. These positioning holes are mainly used in step (4) above to ensure the relative positional relationship between the semi-finished spokes to be welded and the already welded semi-finished spokes.

[0047] The manufacturing tooling of this invention is applicable not only to the manufacturing of double-helix plates, but also to the manufacturing of single-helix plates.

[0048] This invention is not limited to the preferred embodiments described above. Anyone can derive other products in various forms under the guidance of this invention. However, regardless of any changes in shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this invention.

Claims

1. A method for manufacturing a ribbon spiral, characterized in that: Includes the following steps, (1) The machining spindle is a semi-finished spindle; (2) The end of the spoke that is welded to the semi-finished spindle is processed into the finished end, and the spoke is a semi-finished spoke; (3) Place the semi-finished spindle on the manufacturing fixture, fix each semi-finished spoke of the first group through the positioning structure, and make the finished end of the semi-finished spoke fit with the outer circle of the semi-finished spindle, and weld the finished end of the semi-finished spoke to the semi-finished spindle. (4) The semi-finished spindle is rotated 90 degrees, and each semi-finished spoke of the second group is fixed by the positioning structure, so that the finished end of the semi-finished spoke is in contact with the outer circle of the semi-finished spindle, and the finished end of the semi-finished spoke is welded to the semi-finished spindle; in this step, the positioning holes on the tooling are used to position the welded part of the semi-finished spoke in step (3), and the downward-facing semi-finished spoke is inserted into the positioning hole; (5) Mill the other end of the semi-finished spokes of the second group to create a notch; (6) Rotate the semi-finished product spindle 90 degrees and mill the other end of the first group of semi-finished product spokes to create a notch; (7) Remove the semi-finished spindle from the tooling, position the pre-machined spiral blades with the corresponding notches, and weld the spiral blades; (8) The semi-finished spindle is a finished spindle; The manufacturing fixture includes a base with a slot for supporting the semi-finished spindle. The base has positioning slots and pressure plates on both sides of the slot. The positioning slots are used to position the semi-finished spokes, and the pressure plates are used to press the semi-finished spokes. The base has several positioning holes, which are vertically arranged for inserting the semi-finished spokes that have been welded to the semi-finished spindle.

2. The method for manufacturing a ribbon spiral according to claim 1, characterized in that: The finished end is a concave arc end, and the curvature of the concave arc end can fit with the outer circle of the semi-finished spindle.

3. The method for manufacturing a ribbon spiral according to claim 1, characterized in that: The semi-finished spokes of the first group are arranged in two rows, with the two rows spaced 180 degrees apart; the semi-finished spokes of the second group are arranged in two rows, with the two rows spaced 180 degrees apart.

4. The method for manufacturing a ribbon spiral according to claim 1, characterized in that: In step (5), the tooling and the semi-finished spindle on it are installed on a milling machine, and the milling machine is used to mill a notch at the other end of the semi-finished spoke.

5. The method for manufacturing a ribbon spiral according to any one of claims 1 to 4, characterized in that: After welding in step (7), vibration aging treatment is performed.

6. The method for manufacturing a ribbon spiral according to any one of claims 1 to 4, characterized in that: In step (8), the semi-finished spindle is precision machined and the mounting end of the semi-finished spindle is milled to obtain the finished spindle, and the outer diameter of the spiral blade is finished.

7. The method for manufacturing a ribbon spiral according to any one of claims 1 to 4, characterized in that: Dynamic balancing is performed after step (8).

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