Batch alignment positioning clamp based on numerical control machining
The T-shaped fixture aligns CNC machined parts with the machine's coordinates, reducing labor and alignment errors, thereby improving efficiency and precision in aircraft assembly.
Patent Information
- Application Number
- CN202421757988.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-07-24
AI Technical Summary
When processing parts with traditional CNC machines, large-scale processing of parts requires individual correction, resulting in high labor intensity and low processing accuracy of operators.
A batch rectifying and positioning fixture based on CNC machining is designed, and the T-shaped structure is used to correlate with the CNC machine tool coordinates to achieve rapid positioning and tightening of batch parts through auxiliary fixtures to reduce rectifying operations.
It reduces the labor intensity of operators, improves processing efficiency, and ensures the machining accuracy of parts.
Smart Images
Figure CN223098972U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of numerical control machining of aircraft process equipment, and relates to a batch alignment and positioning fixture based on numerical control machining. Background Technique
[0002] Aircraft assembly tooling is a general term for various process equipment used in the aircraft assembly process. The processing procedures of some of its parts, such as blanking, semi-finishing, and finishing, are completed by numerical control. When blanking, semi-finishing, and finishing parts, the traditional method is to debug and align each part to be processed in turn before performing the processing procedure, that is, each part needs to be individually aligned before processing. This method is regular, but when there are a large number of parts, the labor intensity of the operator is high. Content of the Utility Model
[0003] Purpose of the Utility Model
[0004] The utility model overcomes the problem of repeated alignment during the machining of numerically controlled machining parts. That is, when using this auxiliary fixture, it only needs to be assembled and positioned on the operation platform of the numerically controlled machine tool, without the need to straighten and debug the parts to be processed, saving the alignment time of the parts, improving the work efficiency during the machining process of the parts, and ensuring the machining accuracy of the parts.
[0005] Technical Solution
[0006] A batch alignment and positioning fixture based on numerical control machining, the fixture is a T-shaped structure body, and there is a depression 2 at the corner of the T-shaped structure body. The depression 2 is right-angled and is used for positioning and associating the coordinates of the numerically controlled machine tool. There are positioning bolt holes 3 on the upper surface of the T-shaped structure body, which are connected to the base of the numerically controlled machine tool for positioning the T-shaped structure body. There is a boss 1 on the lower surface of the T-shaped structure body, which is used to cooperate with the guide rail on the operation platform and realize coordinate association. After the parts are clamped in place, a pressing plate 4 is used to connect the T-shaped structure body through screws to realize part positioning.
[0007] Further, there are depressions 2 at both corners of the T-shaped structure body, and two parts can be simultaneously clamped and positioned.
[0008] Further, there is a tolerance on the T-shaped structure body for associating the reference coordinates on both sides.
[0009] Further, there is an avoidance groove at the intersection of the right-angle reference.
[0010] Further, the size of the depression 2 is set according to the size of the parts to be processed.
[0011] Further, the T-shaped structure body is made of aluminum material, specifically 6061 aluminum alloy.
[0012] Further, there are several pressing plates 4 arranged circumferentially around the part to be machined for overall pressing of the part.
[0013] The beneficial effects of this application are as follows:
[0014] By utilizing the correlation between the three perpendicular reference planes at both ends of the 50 - mm dimension of the auxiliary tooling and the three X, Y, and Z coordinates of the CNC machine tool, it is only necessary to position the part to be machined on the two reference planes of the 50 - mm dimension of this auxiliary tooling. There is no need to individually debug and align each part, which reduces the labor intensity of the operator and improves work efficiency. In addition, since there is no need to repeatedly align the part to be machined, the machining error of the part caused by inaccurate alignment is reduced, so the machining accuracy of the part is also ensured. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is the overall structure diagram of the present utility model,
[0016] Figure 2 is the diagram of the core component of the present invention,
[0017] Figure 3 is the cross - sectional view of the core component of the present utility model,
[0018] Figure 4 is the actual application scenario diagram of the present utility model combined with CNC part machining. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The present utility model will be further described below in conjunction with the embodiments. The following only describes some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present utility model.
[0020] There is a depression on the right - angled reference edge of the T - shaped structure (a reference depression is provided on the 50 - mm dimension), and this depression is used to correlate with the coordinates of the CNC machine tool. There is an avoidance (root - clearing) groove at the intersection of the right - angled references.
[0021] To solve the above problems, the present utility model is implemented as follows:
[0022] Assemble this auxiliary fixture onto the operation platform of the CNC machine tool (the base of the T - slot of the CNC machine tool has a tolerance fit with this auxiliary tooling), and position the auxiliary fixture with two positioning bolts. After this auxiliary fixture is positioned on the CNC operation platform, the three right - angled surfaces of the depression with a 5 - mm dimension (the depression dimension can be adapted according to the size of the part to be machined) are completely correlated with the three coordinates of the CNC machine tool. When using it for the first time, only the three correlated coordinate values need to be recorded. When processing later, by calling the recorded coordinate values, the alignment of the part to be machined can be completed without individually using a dial indicator to straighten and debug the part to be machined.
[0023] In addition, the numerical control programmer can assemble the two parts to be machined at the right-angle end faces at both ends of this auxiliary tooling in the assembly mode of part modeling. Then, establish the machining reference of the part on one side of the right-angle face, and directly machine the parts at both end faces. The operator does not need to offset the reference coordinate value after machining the part on one right-angle reference face and then machine the part on the other right-angle reference end face.
[0024] The following further describes the present utility model in detail in conjunction with the accompanying drawings and specific embodiments: Connect the positioning fixture to the positioned base in the T-slot on the operation platform through the 2-φ16H7 holes of the positioning fixture shown in Figure 2, and assemble and position this auxiliary fixture on the numerical control operation platform.
[0025] Transfer the X and Y coordinates to the right-angle end faces with a 5mm size depression at both ends of the positioned positioning fixture through the boss of the positioning fixture that cooperates with the T-slot on the operation platform and the base. Determine the Z coordinate through the height difference between the contact surface of the positioning part and the operation platform and the 5mm size depression surface (there are corresponding tolerance constraints between the 5mm size depression surface, right-angle end face, boss surface of the positioning part and the machine tool T-slot). The machining reference of the workpiece after alignment is at the right-angle depression surfaces at both ends of the 50mm size of the positioning part.
[0026] Then, clamp the part to be machined at the 5mm size depression at both ends of the 50mm size end faces of the positioning part. After pressing and positioning it with auxiliary parts such as equal-height cushion blocks, pressing plates, and socket head cap screws, machining can start. After the machining is completed, unload the machined part. Just clamp and position the remaining part to be machined according to the previous method, retrieve the initially recorded coordinate values, and then the part can be machined without repeating the alignment of the part.
[0027] Those skilled in the art of this technology can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used here have the same meaning as the general understanding of those of ordinary skill in the art in the field to which the present utility model belongs. It should also be understood that terms defined in general dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as here. The above-described specific embodiments have further detailed the purpose, technical solution, and beneficial effects of the present utility model. It should be understood that the above is only the specific embodiment of the present utility model and is not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A batch alignment and positioning fixture based on numerical control machining, characterized in that The fixture is a T-shaped structure. There is a depression at the corner of the T-shaped structure. The depression is right-angled and is used for positioning and correlating the coordinates of the CNC machine tool. There are positioning bolt holes on the upper surface of the T-shaped structure, which are connected to the base of the CNC machine tool for positioning the T-shaped structure. There are bosses on the lower surface of the T-shaped structure, which are used to cooperate with the guide rails on the operation platform and achieve coordinate correlation. After the parts are clamped in place, the pressing plate is used to connect the T-shaped structure through screws to achieve part positioning.
2. The fixture according to claim 1, characterized in that, There are depressions at both corners on both sides of the T-shaped structure, which can simultaneously press and position two parts.
3. The fixture according to claim 2, characterized in that, There are tolerances on the T-shaped structure for correlating the reference coordinates on both sides.
4. The jig according to claim 3, characterized in that, There is an avoidance groove at the intersection of the reference coordinates.
5. The fixture according to claim 1, characterized in that The size of the depression is set according to the size of the parts to be processed.
6. The fixture according to claim 5, characterized in that, The T-shaped structure is made of aluminum material.
7. The fixture according to claim 6, characterized in that There are several pressing plates, which are arranged circumferentially around the parts to be processed for overall pressing of the parts.