Positioning fixture for machining thin-walled parts
By combining the inner lining mechanism and the clamping mechanism, the problem of part deformation during the machining of cylindrical thin-walled parts is solved, achieving stable clamping and high-precision machining.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU SHIJIN PRECISION MACHINERY CO LTD
- Filing Date
- 2025-09-01
- Publication Date
- 2026-07-24
AI Technical Summary
Existing positioning fixtures are prone to causing deformation of cylindrical thin-walled parts when machining them, making it difficult to achieve stable clamping and fixation.
The design employs a combination of an inner lining mechanism and a clamping mechanism. The inner lining mechanism is pre-adjusted to match the inner diameter of the part, and the clamping mechanism is used for fixation to prevent deformation.
It enables stable clamping and fixing of cylindrical thin-walled parts of various diameters, preventing part deformation and meeting high-precision machining requirements.
Smart Images
Figure CN224543905U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of thin-walled parts processing technology, specifically to a positioning fixture for thin-walled parts processing. Background Technology
[0002] Thin-walled parts refer to precision components whose wall thickness is much smaller than their outline dimensions. They are characterized by poor rigidity and light weight, but have complex shapes and extremely high precision requirements. They are widely used in aerospace, precision instruments and other fields. Due to their thin structure, they are very prone to deformation and vibration during the machining process due to cutting forces, clamping forces or residual stress. They are one of the most difficult objects to machine in the manufacturing field, and place extremely high demands on machining processes and fixtures.
[0003] In the process of machining cylindrical thin-walled parts, positioning fixtures are used. Although most positioning fixtures can clamp and fix cylindrical thin-walled parts, the lack of internal support of cylindrical thin-walled parts may cause deformation of cylindrical thin-walled parts during the clamping process.
[0004] Therefore, a positioning fixture for machining thin-walled parts is proposed. Utility Model Content
[0005] The purpose of this utility model is to provide a positioning fixture for machining thin-walled parts in order to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution: A positioning fixture for machining thin-walled parts includes a fixed plate and a cylindrical thin-walled part body. A support column is provided at the bottom of the fixed plate, and a mounting plate is provided at the bottom of the support column. A fixed frame is provided at the bottom of the fixed plate. An inner lining mechanism is provided on the fixed frame to internally support the cylindrical thin-walled part body for adapting to various specifications of inner diameter. The inner lining mechanism is located at the top of the fixed plate, and a clamping mechanism is provided on the inner lining mechanism for clamping and fixing the cylindrical thin-walled part body.
[0007] Furthermore, the inner lining mechanism includes a bidirectional screw, which is rotatably mounted inside the fixed frame. A movable rod is threaded onto the outer wall of the bidirectional screw, and the movable rod is slidably mounted on the fixed plate and the fixed frame.
[0008] Furthermore, a shelf is fixedly installed on the top of each of the two movable rods, and an inner liner rod is fixedly installed on the top of each of the two shelf units.
[0009] Furthermore, pointers are fixedly installed on both sides of one of the shelves, and a scale is fixedly installed on the top of the fixed plate, with the pointers slidingly mounted on the surface of the scale.
[0010] Furthermore, a servo motor is fixedly mounted on the surface of the fixed frame, and a bidirectional screw is fixedly mounted on the output end of the servo motor.
[0011] Furthermore, the clamping mechanism includes two connecting plates, which are fixedly mounted on the placement plate. Cylinders are fixedly mounted on the surfaces of both connecting plates, and clamping rods are fixedly mounted on the telescopic ends of both cylinders, with the clamping rods corresponding to the inner liner rods.
[0012] The beneficial effects of this utility model are as follows: This utility model, through the setting of an inner lining mechanism and a clamping mechanism, allows for the following: during use, the inner lining mechanism is pre-adjusted to match the inner diameter of the cylindrical thin-walled part body according to its inner diameter. Then, the cylindrical thin-walled part body is fitted onto the inner lining mechanism, which provides internal support and positioning. The clamping mechanism then clamps and fixes the cylindrical thin-walled part body. With the cooperation of the inner lining mechanism, the cylindrical thin-walled part body will not deform. This achieves stable clamping and fixing of cylindrical thin-walled parts body with various diameters, and the internal support prevents deformation. Attached Figure Description
[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a schematic diagram of the inner liner rod of this utility model.
[0014] Reference numerals: 1. Fixing plate; 2. Support column; 3. Mounting plate; 4. Main body of cylindrical thin-walled part; 5. Fixing frame; 6. Lining mechanism; 601. Bidirectional screw; 602. Moving rod; 603. Shelf plate; 604. Lining rod; 605. Servo motor; 606. Pointer; 607. Scale; 7. Clamping mechanism; 701. Connecting plate; 702. Cylinder; 703. Clamping rod. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0017] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0018] The electrical components mentioned in this article are all connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can be used for control.
[0019] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model 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 utility model.
[0020] like Figure 1-2 As shown, a positioning fixture for machining thin-walled parts includes a fixed plate 1 and a cylindrical thin-walled part body 4. A support column 2 is provided at the bottom of the fixed plate 1, and a mounting plate 3 is provided at the bottom of the support column 2. A fixed frame 5 is provided at the bottom of the fixed plate 1, and an inner lining mechanism 6 is provided on the fixed frame 5 to internally support the cylindrical thin-walled part body 4, which is adapted to accommodate various inner diameters. The inner lining mechanism 6 is located at the top of the fixed plate 1. Figure 1-3 As shown, specifically, the inner lining mechanism 6 includes a bidirectional screw 601, which is rotatably installed inside the fixed frame 5. A moving rod 602 is threaded onto the outer wall of the bidirectional screw 601, and the moving rod 602 is slidably installed on the fixed plate 1 and the fixed frame 5. A shelf 603 is fixedly installed on the top of each of the two moving rods 602, and an inner lining rod 604 is fixedly installed on the top of each of the two shelf 603. A pointer 606 is fixedly installed on both sides of one of the shelf 603. A scale 607 is fixedly installed on the top of the fixed plate 1, and the pointer 606 is slidably installed on the surface of the scale 607. A servo motor 605 is fixedly installed on the surface of the fixed frame 5, and the bidirectional screw 601 is fixedly installed on the output end of the servo motor 605.
[0021] More specifically, based on the inner radius of the cylindrical thin-walled part body 4, the servo motor 605 is activated to drive the bidirectional screw 601 to rotate, causing the two moving rods 602 to move closer to each other or further apart. The two placement plates 603 and the two inner lining rods 604 move accordingly, and the two pointers 606 slide on the two scales 607. With the cooperation of the pointers 606 and the scales 607, the distance of each inner lining rod 604 from the center of the circle can be clearly understood, corresponding to the inner radius of the cylindrical thin-walled part body 4. After the position of the two inner lining rods 604 is adjusted, the cylindrical thin-walled part body 4 is placed on the two inner lining rods 604 and comes into contact with the placement plate 603, thus achieving positioning and internal support.
[0022] The inner lining mechanism 6 is equipped with a clamping mechanism 7 for clamping and fixing the main body 4 of the cylindrical thin-walled part; such as Figure 1 , Figure 3 As shown, specifically, the clamping mechanism 7 includes two connecting plates 701, which are fixedly installed on the placement plate 603. Cylinders 702 are fixedly installed on the surfaces of the two connecting plates 701, and clamping rods 703 are fixedly installed on the telescopic ends of the two cylinders 702, and the clamping rods 703 correspond to the inner lining rods 604.
[0023] More specifically, when the two placement plates 603 move, the two connecting plates 701, the two cylinders 702 and the two clamping rods 703 move accordingly. Then, the two cylinders 702 are activated, which drives the two clamping rods 703 to move closer to each other, clamping and fixing the cylindrical thin-walled part body 4. With the cooperation of the two inner lining rods 604, deformation of the cylindrical thin-walled part body 4 can be avoided.
[0024] In summary, during use, the inner diameter of the cylindrical thin-walled part body 4 is pre-adjusted by the inner lining mechanism 6 to match the inner diameter of the cylindrical thin-walled part body 4. Then, the cylindrical thin-walled part body 4 is fitted onto the inner lining mechanism 6, which provides internal support and positioning for the cylindrical thin-walled part body 4. The clamping mechanism 7 then clamps and fixes the cylindrical thin-walled part body 4. With the cooperation of the inner lining mechanism 6, the cylindrical thin-walled part body 4 will not deform, thus achieving stable clamping and fixing of cylindrical thin-walled part bodies 4 that can adapt to various sizes of circular diameters, and the internal support will prevent deformation.
[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A positioning fixture for machining thin-walled parts, comprising a fixing plate (1) and a cylindrical thin-walled part body (4), characterized in that, The bottom of the fixing plate (1) is provided with a support column (2), the bottom of the support column (2) is provided with an mounting plate (3), the bottom of the fixing plate (1) is provided with a fixing frame (5), the fixing frame (5) is provided with an inner lining mechanism (6) for internal support of the main body (4) of the cylindrical thin-walled part with various inner diameters, and the inner lining mechanism (6) is provided on the top of the fixing plate (1), and the inner lining mechanism (6) is provided with a clamping mechanism (7) for clamping and fixing the main body (4) of the cylindrical thin-walled part.
2. The positioning fixture for machining thin-walled parts according to claim 1, characterized in that, The inner lining mechanism (6) includes a bidirectional screw (601), which is rotatably installed inside the fixed frame (5). A movable rod (602) is threaded on the outer wall of the bidirectional screw (601), and the movable rod (602) is slidably installed on the fixed plate (1) and the fixed frame (5).
3. A positioning fixture for machining thin-walled parts according to claim 2, characterized in that, Each of the two movable rods (602) has a shelf (603) fixedly installed on its top, and each of the two shelf (603) has an inner liner rod (604) fixedly installed on its top.
4. A positioning fixture for machining thin-walled parts according to claim 3, characterized in that, A pointer (606) is fixedly installed on both sides of one of the shelves (603), and a scale (607) is fixedly installed on the top of the fixed plate (1), and the pointer (606) is slidably installed on the surface of the scale (607).
5. A positioning fixture for machining thin-walled parts according to claim 2, characterized in that, A servo motor (605) is fixedly mounted on the surface of the fixed frame (5), and a bidirectional screw (601) is fixedly mounted on the output end of the servo motor (605).
6. A positioning fixture for machining thin-walled parts according to claim 3, characterized in that, The clamping mechanism (7) includes two connecting plates (701), which are fixedly installed on the placement plate (603). Cylinders (702) are fixedly installed on the surfaces of the two connecting plates (701), and clamping rods (703) are fixedly installed on the telescopic ends of the two cylinders (702), and the clamping rods (703) correspond to the inner liner rods (604).