Special detection tool for position tolerance and profile tolerance of aluminum workpiece of rear cross beam of front cabin of automobile
By designing specialized inspection fixtures and employing multi-point inspection components and go/no-go gauges to scan the gap, the problem of low inspection efficiency of aluminum workpieces in the front cabin and rear crossbeam in existing technologies has been solved, achieving rapid and accurate inspection of the outer contour and hole positions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-03-06
AI Technical Summary
Existing technologies are inefficient in inspecting the outer contour and machined holes of aluminum workpieces in the rear crossbeam of the front engine compartment of automobiles. In particular, it is difficult to inspect the local outer contour of stepped structures, resulting in cumbersome and time-consuming inspections.
A special inspection fixture for the position and contour of aluminum workpieces in the rear crossbeam of the front engine compartment of an automobile was designed. It adopts components such as end support base, end pressure arm, shape inspection arm, top hole inspection table and bottom hole inspection table to realize rapid positioning and multi-point inspection of workpieces. The inspection results are judged by scanning the gap with go and no-go gauges.
It enables rapid and accurate inspection of the outer contour and machining holes of aluminum workpieces on the front engine compartment and rear crossbeam, especially the local inspection of stepped structures, which improves inspection efficiency and simplifies the operation process.
Smart Images
Figure CN223976571U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive component manufacturing and inspection technology, specifically a special testing fixture for the position and contour of aluminum workpieces in the rear crossbeam of the front engine compartment of an automobile. Background Technology
[0002] The front engine compartment crossbeam of an automobile is attached to the vehicle frame and is used to fix and support the rear of the front engine compartment. The aluminum profile has a trapezoidal cross section, and several connection holes are machined on the top and bottom surfaces of the profile. Traditionally, the front engine compartment crossbeam is made of steel. With the development of lightweight automobiles, components are gradually being replaced by aluminum alloy materials. Aluminum workpieces have good formability and corrosion resistance.
[0003] Inspecting the outer contour and machined holes of the rear crossbeam of the front engine compartment is typically cumbersome, requiring various inspection tools such as inspection platforms, feeler gauges, hole gauges, and contour gauges. The process is complex and consumes significant time and effort from quality control personnel, especially at high inspection frequencies where efficiency is extremely low. Furthermore, the aluminum workpiece at both ends of the rear crossbeam of the front engine compartment has stepped structures, requiring separate dimensional and positional contour inspections for these structures. This localized contour inspection is particularly difficult. Therefore, improving the inspection efficiency and reducing the difficulty of inspecting the rear crossbeam of the front engine compartment is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention
[0004] The purpose of this utility model is to provide a special inspection fixture for the position and contour of aluminum workpieces in the rear crossbeam of the front engine compartment of an automobile. It is specifically used for the inspection of the outer contour and machining hole positions of the rear crossbeam of the front engine compartment, and has the advantages of fast and accurate inspection and convenient operation.
[0005] To achieve the above objectives, the technical solution of this utility model is as follows:
[0006] A special inspection fixture for the position and contour of an aluminum workpiece in the rear crossbeam of an automobile front engine compartment is provided. An end support seat and an end pressure arm are fixed at both ends of the workpiece, respectively. The horizontal part of the end support seat supports the bottom surface of both ends of the workpiece. The end of the quick clamping arm of the end pressure arm is provided with a pressure head that contacts the upper end surface of the step at both ends of the workpiece. Several top hole inspection platforms and bottom hole inspection platforms are provided in the middle of the workpiece.
[0007] The horizontal part of the end support is provided with a reference positioning hole to match the machining reference holes at both ends of the workpiece, and a reference positioning hole gauge is inserted into the reference positioning hole.
[0008] After the reference positioning gauge is inserted, it can both detect the size and position of the machined hole and position the workpiece on the end support.
[0009] The horizontal part of the end support is equipped with an end bottom gauge, which matches the machined holes at the bottom of both ends of the workpiece. By pushing the end bottom gauge forward and backward, the machined holes at the bottom of the end can be inspected.
[0010] The edges of the reference positioning hole and the end bottom gauge hole are provided with raised edges, forming a gap between the workpiece and the upper end face of the end support. Quality inspectors use both ends of the go / no-go gauge to sweep across the gap. If the large end of the go / no-go gauge cannot be inserted into the gap, but the small end can be inserted into the gap, it proves that the surface contour shape and position (torsion, curvature) of the workpiece meets the processing requirements; otherwise, it proves that the surface contour shape and position of the workpiece is unqualified.
[0011] The workpiece is provided with shape inspection arms at both ends, each including a base, with a pressure arm hinged to the upper end of the base, and a shape gauge installed at the front end of the pressure arm.
[0012] The outer profile gauge is L-shaped, avoiding the positions of the reference positioning hole gauge and the end bottom hole gauge. The edge of the outer profile gauge forms a gap with the upper edge of the workpiece end. The quality inspector uses both ends of the go and no-go gauge to sweep across the gap. If the large end of the go and no-go gauge cannot be inserted into the gap, but the small end of the go and no-go gauge can be inserted into the gap, it proves that the surface contour shape and position (torsion, curvature) of the workpiece meets the processing requirements; otherwise, it proves that the surface contour shape and position of the workpiece is unqualified.
[0013] The top hole inspection station includes a column, a through hole at the top of the column, a telescopic arm inserted into the through hole, and a gauge at the end of the telescopic arm, the position of which matches the top machining hole of the workpiece.
[0014] Matching pin holes are also provided on the upper wall of the through hole and the telescopic arm. The pin holes are inserted into the positioning pins to position the telescopic arm and accurately position the machined holes on the workpiece.
[0015] The bottom hole inspection station includes a base on which several hole gauges are mounted, their positions matching the machined holes on the bottom of the workpiece. The hole gauges are moved forward and backward to inspect the position and size of the machined holes on the lower end face of the workpiece.
[0016] The usage method is as follows:
[0017] (1) Place the workpiece on the end support, and insert the reference positioning hole gauge into the reference positioning hole corresponding to the reference positioning hole at the end of the workpiece to position the workpiece.
[0018] (2) Press down the end pressure arm to form a gap between the end support and the lower surface of the workpiece;
[0019] (3) Lower the shape inspection arm so that a gap is formed between the shape inspection arm and the upper surface of the workpiece;
[0020] (4) Press down the bottom hole gauge, top hole inspection gauge and bottom hole inspection gauge in sequence to check the hole position;
[0021] (5) The quality inspector uses both ends of the go and no-go gauge to scan the gap between the workpiece and the end support seat and the gap between the workpiece and the shape inspection arm. If the large end of the go and no-go gauge cannot be inserted into the gap, but the small end of the go and no-go gauge can be inserted into the gap, it proves that the surface contour shape and position (torsion, curvature) of the workpiece meets the processing requirements; otherwise, it proves that the surface contour shape and position of the workpiece is unqualified.
[0022] Advantages of utility models
[0023] (1) This utility model is specifically used for the detection of the outer contour and machining hole positions of the aluminum workpiece of the front engine compartment and the rear crossbeam. It can simultaneously detect the outer contour and machining hole positions of the workpiece at one time. In particular, it can also realize the local detection of the shape and position of the steps at both ends of the workpiece, which has high detection efficiency.
[0024] (2) This utility model has a compact structure, occupies a small area, is easy to operate and maintain.
[0025] (3) The structure and principle of this utility model can be further expanded to adapt to the detection of other workpieces. Attached Figure Description
[0026] Figure 1 This is an elevation view of the present invention; (including the workpiece).
[0027] Figure 2 for Figure 1 Enlarged structural diagram at point I;
[0028] Figure 3 This is another elevation view of the structure of this utility model; (including the workpiece)
[0029] Figure 4 This is an elevation view of the present invention (excluding the workpiece).
[0030] Figure 5 This is another elevation view of the structure of this utility model; (excluding the workpiece).
[0031] Figure 6 This is a structural elevation view of the workpiece;
[0032] The components in the diagram are named as follows: 1-End support base; 11-Reference positioning hole gauge; 12-End bottom hole gauge; 2-End lower pressure arm; 3-Outline inspection arm; 4-Top hole inspection table; 5-Bottom hole inspection table; 6-Workpiece. Detailed Implementation
[0033] Example 1
[0034] A special inspection fixture for the position and contour of an aluminum workpiece in the rear crossbeam of an automobile front engine compartment is provided. The workpiece 6 has an end support seat 1 and an end pressure arm 2 fixed at both ends. The horizontal part of the end support seat 1 supports the bottom surface of both ends of the workpiece 6. The end of the quick clamping arm of the end pressure arm 2 is provided with a pressure head that contacts the upper end surface of the steps at both ends of the workpiece 6. Several top hole inspection platforms 4 and bottom hole inspection platforms 5 are provided in the middle of the workpiece 6.
[0035] The horizontal part of the end support 1 is provided with a reference positioning hole to match the machining reference holes at both ends of the workpiece 6, and a reference positioning hole gauge 11 is inserted into the reference positioning hole.
[0036] The horizontal part of the end support 1 is provided with an end bottom hole gauge 12, which matches the bottom machining holes at both ends of the workpiece 6.
[0037] The edges of the reference positioning hole and the end bottom hole gauge 12 are provided with raised edges, and the workpiece 6 and the upper end face of the end support 1 form a gap.
[0038] The workpiece 6 is provided with shape inspection arms 3 at both ends, each including a base, with a pressure arm hinged to the upper end of the base, and a shape gauge installed at the front end of the pressure arm.
[0039] The top hole inspection station 4 includes a column, a through hole at the top of the column, a telescopic arm inserted into the through hole, and a gauge at the end of the telescopic arm, the position of which matches the top machining hole of the workpiece 6.
[0040] The bottom hole inspection station 5 includes a base, on which several hole gauges are installed, the positions of which match the bottom machining holes of the workpiece 6.
Claims
1. A special tooling for detecting the positional accuracy and contour accuracy of aluminum workpieces in the rear crossbeam of an automotive front engine compartment, characterized in that: Workpiece (6) both ends are fixed end support seat (1) and end down pressure arm (2), the horizontal part of end support seat (1) supports the lower bottom surface of both ends of workpiece (6);The quick clamping arm end of end down pressure arm (2) is provided with a down pressure head and contacts the upper end surface of the step at both ends of workpiece (6);The middle part of workpiece (6) is provided with a plurality of top hole detection table (4) and bottom hole detection table (5).
2. The automobile front engine compartment rear cross beam aluminum workpiece position and profile special detection tooling of claim 1, characterized in that: The horizontal part of the end support seat (1) is provided with a reference positioning hole, which matches the machining reference hole at both ends of the workpiece (6), and the reference positioning hole is inserted into the reference positioning hole gauge (11).
3. The automobile front engine compartment rear cross beam aluminum workpiece position and profile special detection tooling of claim 1, characterized in that: The horizontal part of the end support seat (1) is provided with an end bottom hole gauge (12), which matches the bottom hole of the workpiece (6).
4. The automobile front end compartment rear cross beam aluminum workpiece position and profile special detection tooling of claim 2, characterized in that: The edge of the reference positioning hole is provided with a convex edge, and the workpiece (6) and the upper end surface of the end support seat (1) form a gap.
5. The automobile front engine compartment rear cross beam aluminum workpiece position and profile special detection tooling of claim 3, characterized in that: The edge of the end bottom hole gauge (12) hole is provided with a convex edge, and the workpiece (6) and the upper end surface of the end support seat (1) form a gap.
6. The position and profile gauge for the automobile front engine compartment rear cross beam aluminum workpiece of claim 1, characterized in that: The both ends of the workpiece (6) are respectively provided with an outline detection arm (3), which includes a base, the upper end of the base is hinged to a pressure arm, and the front end of the pressure arm is provided with an outline gauge.
7. The automobile front end compartment rear cross beam aluminum workpiece position and profile special detection tooling of claim 1, characterized in that: The top hole detection table (4) includes a column, a through hole is arranged at the top of the column, a telescopic arm is penetrated into the through hole, a hole gauge is arranged at the end of the telescopic arm, and the position matches the top machining hole of the workpiece (6).
8. The automobile front end compartment rear cross beam aluminum workpiece position and profile special detection tooling of claim 1, characterized in that: The bottom hole detection table (5) includes a base, a plurality of hole gauges are arranged on the base, and the positions match the bottom machining holes of the workpiece (6).