An internal support fixture for preventing deformation of thin-walled rotating workpieces

Abstract

This utility model belongs to the field of machining technology and discloses an internal support fixture for preventing deformation of thin-walled rotating workpieces. It includes a push screw (1), a support plate (2), side plates (3), a locating pin (4), a ball bearing (5), a tension spring (6), and a tension spring pin (7). The support plate (2) is hinged to the two side plates (3) via two locating pins (4). The inner sides of the two side plates (3) are set as conical surfaces, forming a conical groove between them. The ball bearing (5) is placed in the conical groove. The push screw (1) is connected to the screw hole of the support plate (2). The concave spherical surface of the working surface of the push screw (1) contacts the top surface of the ball bearing (5). The two side plates (3) are equipped with tension spring pins (7). The two hooks of the tension spring (6) are respectively hung on the tension spring pins (7) assembled with the two side plates (7). This utility model enables the thin-walled part to be uniformly stressed internally, preventing stress concentration.

Description

Technical Field

[0001] This utility model belongs to the field of machining technology, and in particular relates to an internal support fixture for preventing deformation of thin-walled rotating workpieces. Background Technology

[0002] In the machining process, thin-walled rotating bodies are frequently encountered. These bodies are very prone to deformation during processing. To ensure timely completion, multiple blanks are typically prepared, and a scrap allowance is usually allocated to guarantee the number of qualified finished products. Extreme care is taken during machining, employing small depths of cut and multiple passes to minimize workpiece deformation.

[0003] The drawbacks of traditional technology: If a large number of thin-walled rotating workpieces are to be processed and the timeframe is tight, using traditional processing technology will reduce work efficiency and may even fail to guarantee the timeframe. Utility Model Content

[0004] The technical problem to be solved by this utility model is that thin-walled rotating workpieces are prone to deformation during processing.

[0005] To solve the above-mentioned technical problems, the specific technical solution of this utility model is as follows:

[0006] An internal support fixture for preventing deformation of a thin-walled rotating workpiece includes a push screw 1, a support plate 2, a side plate 3, a locating pin 4, a ball bearing 5, a tension spring 6, and a tension spring pin 7.

[0007] The support plate 2 is hinged to the two side plates 3 by two positioning pins 4. The outer side of the side plate 3 is set as a cylindrical surface, and the inner side of the two side plates is set as a conical surface. A conical groove is formed between the inner sides of the two side plates, and the expansion ball is set in the conical groove. The push screw 1 is connected to the screw hole of the support plate 2. The concave spherical surface of the working surface of the push screw 1 contacts the top surface of the expansion ball 5. The two side plates 3 are equipped with tension spring pins 7. The two hooks of the tension spring 6 are respectively hung on the tension spring pins 7 assembled with the two side plates 7.

[0008] Furthermore, the two side plates 2 are tightened by tension springs, so that the two side plates 2 are tightly tangent to the expansion ball 5.

[0009] This invention has the following advantages: it can easily machine the outer surface of thin-walled rotating parts with an inner diameter within a certain range. The side plate 3, which contacts the thin-walled part, is a cylindrical structure. Its function is to ensure that the internal force of the thin-walled part is evenly distributed, preventing stress concentration. During the machining process, the cylindrical structure of the side plate 3 can also resist the pressure and shear force applied to the thin-walled part by the tool. Moreover, the relatively stable characteristic of the cylindrical structure makes it difficult for the thin-walled part to shift during the machining process. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the internal support fixture structure for preventing deformation of thin-walled rotating workpieces according to this utility model.

[0011] Figure 2 for Figure 1 A sectional view. Detailed Implementation

[0012] To better understand the purpose, structure, and function of this utility model, a more detailed description of this utility model is provided below with reference to the accompanying drawings.

[0013] like Figure 1 As shown, the internal support fixture for preventing deformation of thin-walled rotating workpieces of this utility model includes: a push screw 1, a support plate 2, a side plate 3, a positioning pin 4, a ball bearing 5, a tension spring 6, and a tension spring pin 7.

[0014] Push screw 1: It is a small semi-circular head low square neck screw. In order to concentrate the force of push screw 1 at the center of expansion ball 6, the working surface of push screw 1 needs to have a larger contact surface with expansion ball 6. Therefore, the working surface of push screw 1 is machined into a concave spherical surface with the same radius as the spherical surface of expansion ball 6.

[0015] Support plate 2: Used to support the connection between push screw 1 and side plate 3, and fixed to side plate 3 by positioning pin 4.

[0016] Side plate 3: It is connected to the support plate 2 by the positioning pin 4. The inner surface is a conical structure and is slidably connected to the expansion ball 5. When the expansion ball 5 moves downward, it pushes the side plate 3 to expand to both sides. Conversely, the side plate 3 contracts.

[0017] Positioning pin 4: Used to connect support plate 2 and side plate 3. The two side plates 3 can rotate around positioning pin 4.

[0018] Ball 5: The spherical crown on the upper surface contacts the working surface of the push screw 1, and the two sides are tangent to the conical groove surfaces inside the two side plates 3.

[0019] Tension spring 6: Used to tighten the two side plates 2 via tension spring pin 7, so that the two side plates 2 are tightly tangent to the expansion ball 5.

[0020] Tension spring pin 7: Two tension spring pins are respectively assembled with the bottom holes of the two side plates to connect tension spring 6.

[0021] Connection relationships:

[0022] The support plate 2 is connected to the two side plates 3 by two locating pins 4, and the two side plates 3 can rotate within a certain range around the two locating pins 4. The expansion ball 5 is installed in the smooth conical groove of the two side plates 3 and can make a certain displacement. The push screw 1 is connected to the screw hole of the support plate 2, and the spherical surface of the working surface of the push screw 1 contacts the top surface of the expansion ball 5. The two side plates 3 are equipped with tension spring pins 7, and the two hooks of the tension spring 6 are respectively hung on the tension spring pins 7 assembled with the two side plates 7.

[0023] The steps and methods for use are as follows:

[0024] 1. First, confirm that the support fixture is working properly. If it does not rotate smoothly, add some lubricating oil.

[0025] 2. Use the air gun provided with the machining center to clean the debris inside the thin-walled workpiece whose outer wall needs to be machined;

[0026] 3. Wipe the inner surface of the thin-walled workpiece clean with a cloth;

[0027] 4. Fit the workpiece together with the side plate 3 of this support fixture;

[0028] 5. Adjust the push screw 1 so that the outer surface of the side plate 3 of this support fixture is in close contact with the inner surface of the thin-walled workpiece and cannot rotate;

[0029] 6. Clamp this fixture onto the worktable of the machining center;

[0030] 7. Align the upper surface and outer diameter of the workpiece, and determine the in-situ coordinates of the coordinate system;

[0031] 8. Perform machining on the outer surface of thin-walled workpieces.

[0032] This embodiment can easily perform outer surface machining on thin-walled rotating parts with an inner diameter within a certain range. The side plate 3, which contacts the thin-walled part, has a spherical structure. Its function is to ensure that the thin-walled part is evenly stressed, preventing stress concentration. During the machining process, the spherical structure of the side plate 3 can also resist the pressure and shear force applied to the thin-walled part by the cutting tool. Moreover, the relatively stable nature of the spherical structure makes it difficult for the thin-walled part to shift during machining.

[0033] By using the tooling of this utility model, the processing efficiency of thin-walled parts is improved, and the finished product qualification rate is also greatly increased.

[0034] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and improvements without departing from the principles of the present invention, and these modifications and improvements should also be considered to fall within the protection scope of the present invention.

Claims

1. An internal support tooling for preventing deformation of a thin-walled revolution workpiece, characterized by, Includes push screw (1), support plate (2), side plate (3), positioning pin (4), expansion ball (5), tension spring (6), and tension spring pin (7); The support plate (2) is hinged to the two side plates (3) by two positioning pins (4). The outer side of the side plate (3) is set as a cylindrical surface, and the inner side of the two side plates (3) is set as a conical surface. A conical groove is formed between the inner sides of the two side plates (3). The expansion ball (5) is set in the conical groove. The push screw (1) is connected to the screw hole of the support plate (2). The concave spherical surface of the working surface of the push screw (1) contacts the top surface of the expansion ball (5). The two side plates (3) are equipped with tension spring pins (7). The two hooks of the tension spring (6) are respectively hung on the tension spring pins (7) assembled with the two side plates (7).

2. The internal support tooling for preventing deformation of a thin-walled revolutional workpiece according to claim 1, wherein, The two side plates (2) are tightened by the tension spring, so that the two side plates (2) are closely tangent to the ball (5).

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