Machining positioning tool for composite material half-circular cover

Abstract

This utility model relates to the field of CNC machining technology for composite materials, and discloses a machining positioning fixture for a composite material semi-circular cover. The fixture includes: a positioning fixture base plate, which is configured as a disc shape and is connected to a machine tool; two positioning devices, respectively disposed on both sides of the positioning fixture base plate along its radial direction; and positioning pins, which are flexibly inserted into the positioning devices and used to cooperate with positioning holes on the forming fixture base plate to position the forming fixture. This utility model's positioning fixture solves the problem of offset during the tapping calibration of the composite material semi-circular cover milling fixture. It also reduces operator preparation time, requiring only the forming / milling fixture and the positioning fixture to be positioned using the positioning pins, eliminating the need to repeat the calibration of each fixture reference, reducing the risk of operator error, and improving machining efficiency.

Description

Technical Field

[0001] This utility model relates to the field of CNC machining technology for composite materials, specifically to a machining positioning fixture for a composite material semi-circular cover. Background Technology

[0002] Due to the unique shape of the composite material semi-circular dome part, a hemispherical molding fixture is required as its mounting mold. Therefore, considering the accuracy of the part's surface from the initial design stage, the molding fixture is designed as a single fixture for both molding and milling (i.e., the molding fixture is also a milling fixture, or a molding and milling integrated fixture). This molding / milling fixture has a pair of radially symmetrical positioning holes 6 and a pair of positioning auxiliary grooves 7. The line connecting the two positioning holes is perpendicular to the line connecting the two positioning auxiliary grooves. Its structure is as follows: Figure 1 (As shown).

[0003] The machining reference is set on the base plate of the forming / milling fixture. During actual machining, when setting the machining coordinates on the machine tool, it is necessary to first calibrate one hole (positioning hole 6) on the base plate of the forming / milling fixture to check the other hole (positioning hole 6). Figure 2 As shown, since the base plate of the forming / milling fixture has a circular structure, it is easy to shift during the calibration process by tapping the base plate. Often, after calibrating one positioning hole, the other positioning hole will shift, causing the two positioning holes to be out of line with the X-axis of the machine tool. It often takes a lot of time to complete the calibration, which affects the processing efficiency. Utility Model Content

[0004] The purpose of this invention is to address the problem that the machining efficiency of composite material semi-circular cover forming fixtures (milling fixtures) requires a lot of time for calibration during machine tool processing. A machining positioning fixture for composite material semi-circular covers is designed to solve the problem of long calibration time and improve processing efficiency.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: This utility model designs a machining positioning fixture for a composite material semi-circular cover, which includes the following structural configuration: A positioning fixture base plate, which is configured as a disc-shaped structure, is used to connect to a machine tool for machining. Two positioners are provided, and the positioners are respectively arranged on both sides of the positioning fixture base plate along the radial direction; And a positioning pin, which is flexibly inserted into the positioner and used to cooperate with the positioning hole on the base plate of the forming tool to position the forming tool.

[0006] Furthermore, a machining positioning fixture for a composite material semi-circular cover: the positioning fixture further includes two positioning grooves, which are respectively arranged on both sides of the base plate of the positioning fixture along the radial direction, and the line connecting the two positioning grooves is perpendicular to the line connecting the two positioners.

[0007] Specifically, the positioning groove provided on the positioning fixture base plate of this utility model can cooperate with the positioning auxiliary groove on the forming fixture (milling fixture) base plate to facilitate the calibration of the disc-shaped positioning fixture base plate. As long as the two positioning grooves are tapped until they are on the line connecting the two positioning auxiliary grooves, and the positioning hole is measured, it can be determined whether the calibration has been completed.

[0008] Furthermore, a machining positioning fixture for a composite material semi-circular cover: the base plate of the positioning fixture is provided with several fixing holes, and the base plate of the positioning fixture is fixedly connected to the machine tool by connecting bolts in the fixing holes.

[0009] Furthermore, a machining positioning fixture for a composite material semi-circular cover: the positioner includes the following structural configuration: A first positioning plate is disposed on the base plate of the positioning fixture; And a second positioning plate, which is disposed on the first positioning plate, and is further provided with a pin hole for insertion into the positioning pin.

[0010] Furthermore, a machining positioning fixture for a composite material semi-circular cover: the positioner also includes a reinforcing plate, which is connected to the first positioning plate and the second positioning plate to increase the structural strength of the positioner.

[0011] Furthermore, a machining positioning fixture for a composite material semi-circular cover: the reinforcing plate is welded and fixed to the first positioning plate and the second positioning plate.

[0012] Furthermore, a machining positioning fixture for a composite material semi-circular cover: the first positioning plate is bolted to the base plate of the positioning fixture.

[0013] Furthermore, a machining positioning fixture for a composite material semi-circular cover: the second positioning plate is welded and fixed to the first positioning plate.

[0014] The beneficial effects of this utility model are: This invention relates to a machining positioning fixture for a composite material semi-circular cover. During machining, the fixture only needs to be calibrated once before being fixed on the machine tool. Subsequent machining operations only require disassembling and reassembling the upper forming / milling fixture, reducing the number of calibrations and improving machining efficiency. Furthermore, this positioning fixture solves the problem of misalignment during the tapping calibration of the milling fixture for the composite material semi-circular cover. It also reduces operator preparation time; the forming / milling fixture and the positioning fixture are simply positioned using locating pins, eliminating the need to repeat the calibration process for each fixture, reducing the risk of operator error and improving machining efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural schematic diagram of a forming tooling (milling tooling), or a structural schematic diagram of a forming and milling integrated tooling; Figure 2 Establish a reference drawing for machine tool machining; Figure 3 A schematic diagram of the machining positioning fixture for this composite material semi-circular cover designed for Embodiment 1 of this utility model; Figure 4 This is an assembly diagram of the forming tooling and the positioning tooling (forming tooling positioning diagram).

[0017] The markings in the image are as follows: 1-Positioning fixture base plate, 2-Positioner, 3-Positioning pin, 4-Positioning groove, 5-Fixing hole, 6-Positioning hole, 7-Positioning auxiliary groove, 21-First positioning plate, 22-Second positioning plate, 23-Pin hole, 24-Reinforcing plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "top," and "bottom," etc., indicating orientation or positional relationships, 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, and therefore should not be construed as a limitation of this utility model. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model described herein can be implemented in orders other than those illustrated or described herein.

[0020] Example 1

[0021] like Figures 3-4 As shown, this embodiment 1 provides a machining positioning fixture for a composite material semi-circular cover, which includes the following structural configuration: The positioning fixture base plate 1 is configured as a disc-shaped structure, and the positioning fixture base plate 1 is used to connect to the machine tool for machining; Positioner 2, which is configured as two, with the two positioners 2 respectively disposed on both sides of the positioning fixture base plate 1 along the radial direction; The positioning pin 3 is flexibly inserted into the positioning device 2 and is used to cooperate with the positioning hole 6 set on the base plate of the forming fixture (milling fixture) to position the forming fixture (milling fixture). And positioning groove 4, which is configured as two, with the two positioning grooves 4 respectively arranged on both sides of the positioning fixture base plate 1 along the radial direction, and the center line connecting the two positioning grooves 4 is perpendicular to the center line connecting the two positioners 2.

[0022] Preferably, the positioning fixture base plate 1 in the above embodiment 1 is also provided with a plurality of fixing holes 5, and the positioning fixture base plate 1 can be fixedly connected to the machine tool by connecting bolts in the fixing holes 5.

[0023] Preferably, the locator 2 in the above embodiment 1 includes the following structural configuration: The first positioning plate 21 is fixedly connected to the positioning fixture base plate 1 by bolts; The second positioning plate 22 is fixedly mounted on the first positioning plate 21 by welding. The second positioning plate 22 is also provided with a pin hole 23 for inserting into the positioning pin 3. And a reinforcing plate 24, which is connected to the first positioning plate 21 and the second positioning plate 22 by welding to increase the structural strength of the positioner 2.

[0024] Specifically, the method of using the machining positioning fixture for the composite material semi-circular cover in Embodiment 1 above is as follows: Because the base plate of the molding fixture is relatively thick, in order to ensure the positioning accuracy of the molding fixture, the positioning hole 6 on the base plate of the molding fixture is not completely drilled through. Therefore, the positioning fixture of this utility model can only use the upper positioning method, that is, a positioner 2 and a flexibly insertable positioning pin 3 are set on the base plate 1 of the positioning fixture. The specific method is as follows: (1) First, hoist the forming fixture (milling fixture) onto the positioning fixture and place it neatly. Use one of the positioning devices 2 to fix the forming fixture to the base plate 1 of the positioning fixture through the positioning pin 3, pin hole 23 and positioning hole 6. (2) Then tap the bottom plate of the forming fixture (milling fixture) from the side. At this time, the forming fixture will rotate around a fixed positioning hole 6 as the center, and slowly make the pin hole 23 on the other positioning device 2 coincide with the other positioning hole 6 on the forming fixture. Then insert the positioning pin 3 to ensure accurate positioning.

[0025] Because the forming fixture (milling fixture) rotates around the locating pin 3 and locating hole 6 during the tapping calibration process, it is limited by the locating pin 3. Therefore, there will be no fixture offset problem after tapping. This solves the problem of offset during tapping calibration of composite material semi-circular cover milling fixture (forming fixture), reduces fixture calibration time and operator error risk, and effectively increases machine tool processing efficiency. Therefore, using the positioning fixture of this utility model can reduce operator preparation time. Only the machining fixture and positioning fixture need to be positioned by the locating pin, eliminating the need to repeat the operation of each fixture calibration reference, reducing the risk of operator error, and improving processing efficiency.

[0026] The above-described preferred embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of this utility model. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A machining positioning tool for a composite material half-doughnut, characterized in that, The positioning fixture includes the following structural features: The positioning fixture base plate (1) is configured as a disc-shaped structure and is used to connect to the machine tool for machining. Positioner (2), which is configured as two, the positioner (2) is respectively disposed on both sides of the positioning fixture base plate (1) along the radial direction; And a positioning pin (3), which is flexibly inserted into the positioning device (2) to cooperate with the positioning hole (6) on the base plate of the forming tool to achieve positioning of the forming tool.

2. The machining positioning tool for a composite material half-round cover body according to claim 1, characterized in that, The positioning fixture also includes two positioning slots (4), which are respectively arranged on both sides of the base plate (1) of the positioning fixture along the radial direction, and the line connecting the two positioning slots (4) is perpendicular to the line connecting the two positioners (2).

3. The machining positioning tool for a composite material half-dome cover body according to claim 1, characterized in that, The positioning fixture base plate (1) is also provided with several fixing holes (5), and the positioning fixture base plate (1) is fixedly connected to the machine tool by connecting bolts in the fixing holes (5).

4. The machining positioning tool for a composite material half-dome cover body according to claim 1, characterized in that, The locator (2) includes the following structural configuration: The first positioning plate (21) is disposed on the positioning fixture base plate (1); And a second positioning plate (22), which is disposed on the first positioning plate (21), and is also provided with a pin hole (23) for insertion into the positioning pin (3).

5. The machining positioning tooling for a composite material half-dome cover body according to claim 4, characterized in that, The locator (2) also includes a reinforcing plate (24), which is connected to the first positioning plate (21) and the second positioning plate (22) to increase the structural strength of the locator (2).

6. The machining positioning tooling for a composite material half-dome cover body of claim 5, wherein, The reinforcing plate (24) is welded and fixed to the first positioning plate (21) and the second positioning plate (22).

7. The machining positioning tooling fixture for a composite material half-dome cover body of claim 4, wherein, The first positioning plate (21) is bolted to the positioning fixture base plate (1).

8. The machining positioning tool for a composite material half-dome cover body according to claim 4, characterized in that, The second positioning plate (22) is welded and fixed to the first positioning plate (21).

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