Plate spring seat correction flatting front axle forging testing fixture

Abstract

This invention discloses a leaf spring seat correction and flattening front axle forging inspection fixture, relating to the technical field of automotive parts inspection devices. It includes: a fixture base, a sliding end base, a cylinder, a sliding block, a bushing, a leaf spring seat inspection plate, a flange support, a V-shaped assembly, a V-shaped assembly fixing seat, a locking nut, a fixing end adjusting shim, a shim, a pendulum pin, an adjusting screw assembly, a side deviation detection reference seat, a sliding block pressure plate, a scale plate, a length scale pointer, and a rotating shaft. Using the upper surface of the leaf spring seat of the front axle standard shaft as the inspection reference, the front axle standard shaft to be inspected is placed face down above the two leaf spring seat inspection plates of the fixture. The cylinder drives the sliding block forward and backward. After the V-shaped assembly clamps the front axle standard shaft, key dimensions of the front axle forging are inspected. Key dimensions such as front axle drop, total length, leaf spring seat side deviation, leaf spring seat flatness, and head side deviation are inspected using scales at various positions on the fixture, ensuring 100% rapid inspection of the front axle blank forging.

Description

Technical Field

[0001] This invention relates to the field of automotive parts testing equipment, specifically to a leaf spring seat correction and flattening front axle forging inspection tool. Background Technology

[0002] The leaf spring seats of the front axle forging have draft angles on both the top and bottom surfaces, which are machined in subsequent machining processes to ensure assembly requirements. During the clamping and inspection of the front axle forging, the leaf spring seats are placed face down on the leaf spring seat support pins of the fixture. The leaf spring seat support pins are mounted on rotating support blocks, one on each side, corresponding to the positions of the front axle leaf spring seats, and are rotatable, thus ensuring constant contact with the two leaf spring seats. The rotating support blocks can only check whether the lateral deviation of the leaf spring seats exceeds the tolerance, but they cannot be used to inspect the surface flatness.

[0003] During the inspection process, the V-shaped head is always clamped to the front axle head. It rotates according to the deformation of the front axle leaf spring seat, and the head's lateral deviation is detected by combining the indication from the V-shaped head's pendulum. The specific inspection method is as follows: 1) Place the front axle to be inspected on the inspection fixture with the leaf spring seat facing upwards using a small mechanical hanger; 2) After clamping with a cylinder, inspect the front axle for key dimensions such as drop, leaf spring seat lateral deviation, head lateral deviation, and overall length; 3) Rework and repair any non-conforming items through cold straightening; 4) After rework and repair, the front axle is re-inspected using the inspection fixture.

[0004] The existing front axle leaf spring seat fixture has the following problems:

[0005] 1) Unable to detect the flatness of a single leaf spring seat surface;

[0006] 2) Unable to detect the overall flatness of the two leaf spring seat planes;

[0007] 3) Unable to detect whether the two flanges are deformed;

[0008] 4) The detection datum and the machining positioning datum are inconsistent, resulting in poor detection accuracy. Summary of the Invention

[0009] This invention addresses the problems existing in the prior art by devising a front axle forging inspection fixture for correcting and flattening leaf spring seats. It uses a special inspection fixture to inspect key dimensions such as front axle drop, overall length, leaf spring seat lateral deviation, leaf spring seat flatness, and head lateral deviation, ensuring that all key dimensions of the front axle in the shipment are qualified, eliminating processing waste caused by unqualified key dimensions, and guaranteeing the quality of the finished front axle after processing.

[0010] The technical solution adopted to achieve the present invention is: a leaf spring seat correction and flattening front axle forging inspection fixture, characterized in that it includes: a fixture base 1, a sliding end base 2, a cylinder 3, a sliding block 5, a bushing 6, a leaf spring seat detection plate 7, a flange support 9, a V-shaped assembly 10, a V-shaped assembly fixing seat 11, a locking nut 12, a fixing end adjusting shim 13, a shim 14, a pendulum pin 18, an adjusting screw assembly 19, a side deviation detection reference seat 20, a sliding block pressure plate 21, a scale plate 24, a length scale pointer 25, and a rotating shaft 27. The cylinder 3, the sliding end base 2, and the flange support are arranged sequentially from left to right on the upper surface of the fixture base 1. 9 and pad 14, the cylinder 3, sliding end base 2, flange support 9 and pad 14 are detachably connected to the fixture base 1, a sliding block 5 is provided on the sliding end base 2, and sliding block pressure plates 21 are respectively provided on both sides of the lower end face of the sliding block 5. The sliding block pressure plates 21 are threaded to the sliding end base 2, and the sliding block pressure plates 21 are clearance-fitted to the sliding block 5. The cylinder 3 is threaded to the sliding block 5. A through hole is provided on the sliding block 5, and a rotating shaft 27 is provided in the through hole of the sliding block 5. A bushing 6 is provided between the through hole of the sliding block 5 and the rotating shaft 27. The rotating shaft 27 The front axle head is fixedly connected to the V-shaped assembly 10. The rear axle diameter of the rotating shaft 27 is threadedly connected to the locking nut 12. A length scale pointer 25 is provided on the rear end face of the sliding block 5. A scale plate 24 is provided on the upper end face of the sliding block pressure plate 21. The length scale pointer 25 is located above the scale plate 24. A side deviation detection reference seat 20 is provided on the side of the sliding block 5. A pendulum pin 18 is provided on the side of the V-shaped assembly 10. The V-shaped assembly 10 and the pendulum pin 18 are connected by an adjusting screw assembly 19. The pendulum pin 18 is located in front of the side deviation detection reference seat 20. A leaf spring seat is provided on the upper part of the flange support 9. The measuring plate 7 has a fixed end adjusting shim 13 on the pad 14, which is threaded to the pad 14. A V-shaped component fixing seat 11 is provided on the fixed end adjusting shim 13, which is threaded to the fixed end adjusting shim 13. A through hole is provided on the V-shaped component fixing seat 11, and a rotating shaft 27 is provided in the through hole of the V-shaped component fixing seat 11. A bushing 6 is provided between the through hole of the V-shaped component fixing seat 11 and the rotating shaft 27. The front shaft head of the rotating shaft 27 is fixedly connected to the V-shaped component 10, and the shaft diameter of the rotating shaft 27 is threaded to the locking nut 12.

[0011] Furthermore, the leaf spring seat correction and flattening front axle forging inspection tool also includes: a connecting shaft 4, which is provided between the cylinder 3 and the sliding block 5, and the connecting shaft 4 is threadedly connected to the cylinder 3 and the sliding block 5 respectively.

[0012] Furthermore, the sliding block 5 is interference-fitted with the bushing 6, and the rotating shaft 27 is clearance-fitted with the bushing 6.

[0013] Furthermore, a lifting ring 16 is provided on the upper surface of the inspection fixture base 1.

[0014] Furthermore, the V-shaped component 10 includes: a lever brake pin 10.1, a V-block 10.2, and a V-block lever 10.3.

[0015] Furthermore, the various parts of the inspection fixture base 1 are welded together.

[0016] Furthermore, the inspection fixture base 1 is made of Q235 material.

[0017] The beneficial effects of the leaf spring seat straightening and flattening front axle forging inspection fixture of the present invention are reflected in the following aspects:

[0018] A leaf spring seat correction and flattening front axle forging inspection fixture uses the upper surface of the leaf spring seat of the front axle standard shaft as the inspection datum, which is consistent with the machining positioning datum. The front axle standard shaft to be inspected is placed downwards above the two leaf spring seat inspection plates of the fixture. The V-shaped assembly moves forward and backward with the cylinder. After the V-shaped assembly clamps the front axle standard shaft, the key dimensions of the front axle forging are inspected. By using the scales at various positions of the fixture, key dimensions such as front axle drop, total length, leaf spring seat lateral deviation, leaf spring seat flatness, and head lateral deviation are inspected, ensuring 100% rapid inspection of the front axle blank forging. This achieves 100% inspection of the leaf spring seat correction and flattening front axle forging blank, meets functional requirements, ensures that all key dimensions of the front axle standard shaft are qualified, and eliminates machining scrap caused by unqualified key dimensions. Attached Figure Description

[0019] Figure 1 This is a three-dimensional view of a leaf spring seat correction and flattening front axle forging inspection fixture;

[0020] Figure 2 yes Figure 1 A magnified view of A in the middle;

[0021] Figure 3 This is a front view of a tool for calibrating and flattening front axle forgings for leaf spring seats;

[0022] Figure 4 This is a top view of a leaf spring seat straightening and flattening front axle forging inspection fixture;

[0023] Figure 5 yes Figure 4 A magnified view of C;

[0024] Figure 6 yes Figure 5 Partial sectional view of BB in the middle;

[0025] In the diagram: 1. Inspection fixture base, 2. Sliding end base, 3. Cylinder, 4. Connecting shaft, 5. Sliding block, 6. Bushing, 7. Leaf spring seat detection plate, 8. Front axle standard shaft, 9. Flange support seat, 10. V-shaped assembly, 10.1. Lever brake pin, 10.2. V-block, 10.3. V-block lever, 11. V-shaped assembly fixing seat, 12. Locking nut, 13. Fixed end adjusting shim, 14. Shim, 15. Tightening screw, 16. Lifting ring, 17. Positioning pin, 18. Swing pin, 19. Adjusting screw assembly, 20. Lateral deviation detection reference seat, 21. Sliding block pressure plate, 22. V-shaped mounting screw, 23. Pressure plate adjusting rod, 24. Scale plate, 25. Length scale pointer, 26. Swing pin positioning pin, 27. Rotating shaft. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1-6 The present invention will be further described in detail below with reference to specific embodiments. In order to make the purpose, technical solution and advantages of the embodiments clearer, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings. The specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0027] As attached Figures 1-4As shown, a leaf spring seat correction and flattening front axle forging inspection fixture includes: a fixture base 1, a sliding end base 2, a cylinder 3, a connecting shaft 4, a sliding block 5, a bushing 6, a leaf spring seat detection plate 7, a flange support 9, a V-shaped assembly 10, a V-shaped assembly fixing seat 11, a locking nut 12, a fixing end adjusting shim 13, a shim 14, a swivel pin 18, an adjusting screw assembly 19, a side deviation detection reference seat 20, a sliding block pressure plate 21, a scale plate 24, a length scale pointer 25, and a rotating shaft 27. The cylinder 3, sliding end base 2, flange support 9, and shim 14 are arranged sequentially from left to right on the upper surface of the fixture base 1. Support 9 and pad 14 are detachably connected to gauge base 1. A connecting shaft 4 is provided between cylinder 3 and sliding block 5, and the connecting shaft 4 is threadedly connected to cylinder 3 and sliding block 5 respectively. Sliding block 5 is provided on sliding end base 2. Sliding block pressure plates 21 are provided on both sides of the lower end face of sliding block 5. Sliding block pressure plates 21 are threadedly connected to sliding end base 2. Sliding block pressure plates 21 and sliding block 5 are clearance-fitted. Cylinder 3 is threadedly connected to sliding block 5. A through hole is provided on sliding block 5. A rotating shaft 27 is provided in the through hole of sliding block 5. A bushing 6 is provided between the through hole of sliding block 5 and rotating shaft 27. The front axle head of the rotating shaft 27 is fixedly connected to the V-shaped assembly 10. The rear axle diameter of the rotating shaft 27 is threadedly connected to the locking nut 12. A length scale pointer 25 is provided on the rear end face of the sliding block 5. A scale plate 24 is provided on the upper end face of the sliding block pressure plate 21. The length scale pointer 25 is located above the scale plate 24. A side deviation detection reference seat 20 is provided on the side of the sliding block 5. A pendulum needle 18 is provided on the side of the V-shaped assembly 10. The V-shaped assembly 10 and the pendulum needle 18 are connected by an adjusting screw assembly 19. The pendulum needle 18 is located in front of the side deviation detection reference seat 20. A leaf spring seat detection plate 7 is provided on the upper part of the flange support seat 9. A fixed end adjusting shim 13 is provided on the shim 14, and the fixed end adjusting shim 13 is threadedly connected to the shim 14. A V-shaped component fixing seat 11 is provided on the fixed end adjusting shim 13, and the V-shaped component fixing seat 11 is threadedly connected to the fixed end adjusting shim 13. A through hole is provided on the V-shaped component fixing seat 11, and a rotating shaft 27 is provided in the through hole of the V-shaped component fixing seat 11. A bushing 6 is provided between the through hole of the V-shaped component fixing seat 11 and the rotating shaft 27. The front shaft head of the rotating shaft 27 is fixedly connected to the V-shaped component 10. The shaft diameter of the rotating shaft 27 is threadedly connected to the locking nut 12. A lifting ring 16 is provided on the upper surface of the inspection fixture base 1.

[0028] Example:

[0029] After the front axle standard shaft 8 undergoes the hot straightening and flattening process of the leaf spring seat, it is then cooled to room temperature through a temperature-controlled cooling process. It is then inspected using a leaf spring seat straightening and flattening front axle forging fixture. First, before production, a qualified front axle standard shaft 8 is used to calibrate the leaf spring seat straightening and flattening front axle forging fixture. The calibration items include height difference, total length, leaf spring seat side deviation, leaf spring seat flatness, and head side deviation, thereby achieving 100% inspection of the front axle standard shaft 8.

[0030] The front axle standard shaft 8 is placed downwards on the leaf spring seat detection plate 7 of the leaf spring seat correction and flattening front axle forging inspection fixture. Then, the cylinder 3 is inflated, and the piston rod of the cylinder 3 moves forward. At the same time, the cylinder 3 pushes the sliding block 5 forward. The sliding block 5 drives the V-shaped assembly 10 forward. The V-shaped assembly 10 clamps the front axle standard shaft 8. After the V-shaped assembly 10 clamps the front axle standard shaft 8, the key dimensions are checked by the scales at various positions of the leaf spring seat correction and flattening front axle forging inspection fixture to ensure that all key dimensions of the qualified front axle standard shaft 8 blank forging are qualified.

[0031] The fixed end pads 14 are fastened to the fixture base 1 with bolts, and precise positioning is achieved through the positioning pins 17, eliminating deviations and gaps caused by the machining and installation processes. The leaf spring seat detection plate 7 is installed above the flange support 9 with screws. The leaf spring seat detection plate 7 has scale lines on both sides to determine whether the front axle leaf spring seat is within the scale lines. If it is within the scale lines, it is considered qualified. Its function is to detect the lateral deviation and flatness of the leaf spring seat. The cylinder 3 and the sliding block 5 are connected by the connecting shaft 4. The connecting shaft 4 is connected to the sliding block 5 by threaded installation. During the air intake and exhaust of the cylinder 3, the sliding block 5 is driven forward and backward through the connecting shaft 4 to realize the opening and closing movement of the V-shaped assembly 10, thereby completing the clamping process of the leaf spring seat correction and flattening front axle forging fixture.

[0032] As attached Figure 5 , 6 As shown, the V-shaped assembly 10 is connected to the rotating shaft 27 by mounting screws 22. The rotating shaft 27 passes through the bushing 6. As the V-shaped assembly 10 rotates, the rotating shaft 27 rotates within the bushing 6. The V-shaped assembly 10 is fixed to the outside of the rotating shaft 27 by locking nuts 12 to prevent it from falling off.

[0033] The operator places the leaf spring seat of the front axle standard shaft 8 downwards above the leaf spring seat detection plate 7, clamps the front axle standard shaft 8 with the cylinder 3, and positions and clamps the heads on both sides of the front axle standard shaft 8 with the V-shaped assembly 10. The pendulum needle 18 swings and transmits through the adjusting screw assembly 19 and the V-shaped assembly 10. The lateral deviation detection reference seat 20 is mounted on the sliding block 5 and has scale lines on it. During operation, the torsional deformation of the head of the front axle standard shaft 8 is determined by the pointer direction of the pendulum needle 18 and the corresponding scale line position of the lateral deviation detection reference seat 20. The size and direction are measured; during the clamping process of the V-shaped component 10, the heads of the V-shaped component 10 are aligned with the two sides of the front axle standard shaft 8 to detect the drop of the front axle standard shaft 8; the length scale pointer 25 is mounted on the sliding block 5 by screws, and the length scale pointer 25 is moved forward or backward by the sliding block 5; the length scale plate 24 is mounted on the sliding block pressure plate 21 by screws, and there are scale lines on the length scale plate 24. The total length of the front axle standard shaft 8 is detected by the position of the length scale pointer 25 corresponding to the scale line on the scale plate 24.

[0034] The above description is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A tooling for calibrating and flattening front axle forgings for leaf spring seats, characterized in that it... include: The fixture base (1), sliding end base (2), cylinder (3), sliding block (5), bushing (6), leaf spring seat detection plate (7), flange support seat (9), V-type assembly (10), V-type assembly fixing seat (11), locking nut (12), fixed end adjusting pad (13), pad (14), oscillating pin (18), adjusting screw assembly (19), side deviation detection reference seat (20), sliding block pressure plate (21), scale plate (24), length scale pointer (25), and rotating shaft (27) are arranged sequentially from left to right on the upper surface of the fixture base (1). The flange support (9) and the pad (14) are detachably connected to the fixture base (1). A sliding block (5) is provided on the sliding end base (2). Sliding block pressure plates (21) are provided on both sides of the lower end face of the sliding block (5). The sliding block pressure plates (21) are threaded to the sliding end base (2). The sliding block pressure plates (21) are clearance-fitted to the sliding block (5). The cylinder (3) is threaded to the sliding block (5). A through hole is provided on the sliding block (5). A rotating shaft (27) is provided in the through hole of the sliding block (5). A bushing (6) is provided between the through hole of the sliding block (5) and the rotating shaft (27). The front shaft head of the rotating shaft (27) is fixed to the V-shaped assembly (10). The rear shaft diameter of the rotating shaft (27) is threadedly connected to the locking nut (12). A length scale pointer (25) is provided on the rear end face of the sliding block (5). A scale plate (24) is provided on the upper end face of the sliding block pressure plate (21). The length scale pointer (25) is located above the scale plate (24). A side deviation detection reference seat (20) is provided on the side of the sliding block (5). A pendulum needle (18) is provided on the side of the V-shaped assembly (10). The V-shaped assembly (10) and the pendulum needle (18) are connected by an adjusting screw assembly (19). The pendulum needle (18) is located in front of the side deviation detection reference seat (20). A leaf spring seat detection plate (7) is provided on the upper part of the flange support seat (9). A fixed end adjusting pad (13) is provided on the pad (14), and the fixed end adjusting pad (13) is threadedly connected to the pad (14). A V-shaped component fixing seat (11) is provided on the fixed end adjusting pad (13), and the V-shaped component fixing seat (11) is threadedly connected to the fixed end adjusting pad (13). A through hole is provided on the V-shaped component fixing seat (11), and a rotating shaft (27) is provided in the through hole of the V-shaped component fixing seat (11). A bushing (6) is provided between the through hole of the V-shaped component fixing seat (11) and the rotating shaft (27). The front shaft head of the rotating shaft (27) is fixedly connected to the V-shaped component (10), and the shaft diameter of the rotating shaft (27) is threadedly connected to the locking nut (12).

2. The leaf spring seat straightening and flattening front axle forging inspection tool according to claim 1, characterized in that, The leaf spring seat correction and flattening front axle forging inspection tool further includes: a connecting shaft (4), which is provided between the cylinder (3) and the sliding block (5), and the connecting shaft (4) is threadedly connected to the cylinder (3) and the sliding block (5) respectively.

3. The leaf spring seat straightening and flattening front axle forging inspection fixture according to claim 1, characterized in that, The sliding block (5) is interference-fitted with the bushing (6), and the rotating shaft (27) is clearance-fitted with the bushing (6).

4. The leaf spring seat straightening and flattening front axle forging inspection fixture according to claim 1, characterized in that, A lifting ring (16) is provided on the upper surface of the fixture base (1).

5. A leaf spring seat straightening and flattening front axle forging inspection fixture according to claim 1, characterized in that, The V-shaped component (10) includes: a lever brake pin (10.1), a V-block (10.2), and a V-block lever (10.3).

6. The leaf spring seat straightening and flattening front axle forging inspection fixture according to claim 1, characterized in that, The various parts of the inspection tool base (1) are welded together.

7. A leaf spring seat straightening and flattening front axle forging inspection fixture according to claim 6, characterized in that, The inspection fixture base (1) is made of Q235.

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