Fluorescent magnetic powder inspection protection connecting device for crankshaft with unconventional flange

Abstract

The invention discloses a fluorescent magnetic powder inspection protection connecting device for a crankshaft with an unconventional flange. The fluorescent magnetic powder inspection protection connecting device comprises a buckle, a rotating shaft and a connecting flange, one end of the rotating shaft is connected with the magnetizing device and is positioned on a carrier roller of the machine body; the buckle is connected to the outer side face of the rotating shaft in a sleeving mode, a connecting pin is arranged at one end of the rotating shaft, the connecting pin is inserted into a connecting pin hole in the connecting flange, and the buckle is connected with the connecting flange through threads; according to the fluorescent magnetic powder inspection protection connecting device for the crankshaft with the unconventional flange, magnetic powder inspection detection can be rapidly carried out on the crankshaft with a special-shaped flange structure, meanwhile, the crankshaft is protected against interference with a machine tool, and the inspection efficiency and quality are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of flaw detection, and particularly to a fluorescent magnetic particle flaw detection protection connection device for a crankshaft with unconventional flanges. Background Art

[0002] As a core moving part of a high-speed diesel engine, the crankshaft is the direct unit of the power output of the entire diesel engine, and its surface quality directly affects the safety and reliability of the diesel engine operation. Generally, when the surface of the crankshaft is processed to the final size, fluorescent magnetic particle flaw detection is used for inspection.

[0003] However, with the development of technology, crankshaft parts are developing towards light weight and high strength, and the accuracy requirements and structures of the flange journals of crankshaft parts have changed greatly. New flange structures will be designed at both ends of the crankshaft according to the usage requirements, generally divided into two types: cylindrical flanges and tapered flanges. For cylindrical flanges, affected by the sizes of the flange journals at both ends of the crankshaft and the flange width, the crankshaft flange or the crank arm behind the flange will interfere with the machine tool rollers, or due to the inconsistent sizes of the flanges at both ends, the entire crankshaft will be in an inclined state when clamped on the flaw detector, and the magnetic conduction device cannot contact the part over a large area, and it is easy to cause spark damage to the part after power on; for tapered flanges, since the surface of the flange is tapered, the contact between the flange and the machine tool roller is a point contact, and it is difficult for the roller to drive the crankshaft to rotate when it rotates, and it is very easy to scratch the high-precision tapered surface during the rotation process. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects, and provide a fluorescent magnetic particle flaw detection protection connection device for a crankshaft with unconventional flanges, which can quickly perform magnetic particle flaw detection on a crankshaft with a special-shaped flange structure while protecting the crankshaft from interfering with the machine tool, and can effectively solve the problems in the background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A fluorescent magnetic particle flaw detection protection connection device for a crankshaft with unconventional flanges, comprising a buckle, a rotating shaft and a connecting flange;

[0006] One end of the rotating shaft is connected to the magnetic conduction device and is located on the roller of the machine body;

[0007] The buckle is sleeved on the outer side of the rotating shaft. A connecting pin is provided at one end of the rotating shaft, and the connecting pin is inserted into the connecting pin hole on the connecting flange. The buckle and the connecting flange are connected by threads;

[0008] One end of the connecting flange is connected to the flange on the crankshaft.

[0009] As a preferred technical solution of the present invention, the rotating shaft is a T-shaped stepped shaft, the size of the small end of the T-shaped stepped shaft is adapted to the clamping range of the fluorescent magnetic particle flaw detector, and three connecting pins are evenly distributed on the large end of the T-shaped stepped shaft, and are adapted to the size of the connecting pin holes on the connecting flange.

[0010] As a preferred technical solution of the present invention, the connecting flange is made of a conductive material.

[0011] As a preferred technical solution of the present invention, three curved waist-shaped holes are also evenly distributed on the connecting flange for installing bolts to connect with the flange on the crankshaft.

[0012] As a preferred technical solution of the present invention, an inner hole is provided at the middle position of the buckle for sleeving on the outer side surface of the rotating shaft, an internal thread is provided on the inner side surface of the buckle, and an external thread adapted to the internal thread of the buckle is provided on the outer side surface of the connecting flange.

[0013] As a preferred technical solution of the present invention, the diameter of the connecting flange is larger than the diameter of the flange on the crankshaft.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The fluorescent magnetic particle flaw detection protection connection device for the crankshaft with an unconventional flange is reasonably designed and ingeniously conceived. It is connected to the flange on the crankshaft through the rotating shaft and the connecting flange, avoiding interference with the equipment during the fluorescent magnetic particle flaw detection of the crankshaft parts; it will not cause the crankshaft parts to be in a point contact state with the magnetizing device of the fluorescent magnetic particle flaw detector, avoiding the burning problem when a large current passes through. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the detection during the operation of the present invention;

[0016] Figure 2 It is a schematic structural diagram of the present invention;

[0017] Figure 3 It is a schematic structural diagram of the buckle;

[0018] Figure 4 It is a schematic structural diagram of the rotating shaft;

[0019] Figure 5 It is a schematic structural diagram of the connecting flange.

[0020] In the figure: 1 magnetizing device, 2 buckle, 21 inner hole, 22 internal thread, 3 crankshaft, 4 rotating shaft, 41 connecting pin, 5 idler roller, 6 connecting flange, 61 curved waist-shaped hole, 62 connecting pin hole, 63 external thread. DETAILED DESCRIPTION OF THE INVENTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0022] Please refer to Figures 1-5 , the present invention provides a technical solution: a fluorescent magnetic particle flaw detection protection connection device for an unconventional flange crankshaft, including a buckle 2, a rotating shaft 4, and a connecting flange 6;

[0023] The rotating shaft 4 is a T-shaped stepped shaft. The size of the small end of the T-shaped stepped shaft is adapted to the clamping range of the fluorescent magnetic particle flaw detector to avoid interference with the idler roller 5. Three connecting pins 41 are evenly distributed on the large end of the T-shaped stepped shaft and are adapted to the sizes of the connecting pin holes 62 on the connecting flange 6 to transmit rotational power and enable the crankshaft 3 to rotate during magnetic particle flaw detection. The other end of the rotating shaft 4 is connected to the magnetic conduction device 1 and is located on the idler roller 5 of the machine body to ensure that the crankshaft 3 can perform operations such as magnetic conduction, demagnetization, and rotation during the detection process;

[0024] An inner hole 21 is provided at the middle position of the buckle 2 for sleeving on the outer side surface of the rotating shaft 4. An internal thread 22 is provided on the inner side surface of the buckle 2, and an external thread 63 adapted to the internal thread 22 of the buckle 2 is provided on the outer side surface of the connecting flange 6;

[0025] The connecting flange 6 is a flange plate made of a material with good contact and conductive properties.

[0026] Further, three curved waist-shaped holes 61 are also evenly distributed on the connecting flange 6 for installing bolts to connect with the flange on the crankshaft 3. The distances of the three curved waist-shaped holes 61 on the same circumference are equal and are radially restricted after connecting with the crankshaft 3, and all three translational degrees of freedom are limited, which not only ensures that there will be no movement relative to the crankshaft 3 after connection, but also is applicable to connecting different-sized special-shaped flange plates on the crankshaft 3.

[0027] Further, the diameter of the connecting flange 6 is larger than the diameter of the flange plate on the crankshaft 3, which can ensure the contact area between the connecting flange 6 and the flange on the crankshaft 3 and also protect the high-precision surfaces of the flanges at both ends of the crankshaft 3 from being damaged.

[0028] During use: Fix the connecting flange 6 to the flanges at both ends of the crankshaft 3 with bolts respectively. Align and insert the connecting pins 41 on the rotating shaft 4 into the connecting pin holes 62 on the connecting flange 6 respectively. Then pass the buckle 2 through the rotating shaft 4 and lock and fix it with the connecting flange 6 through threads. Finally, clamp the connected crankshaft 3 and the connecting device on the magnetic particle flaw detector for magnetic particle flaw detection.

[0029] The present invention can quickly clamp crankshafts 3 of various models on a magnetic particle flaw detector for detection, and can ensure that the high-precision surface of the crankshaft 3 will not be damaged during the detection process. It has strong versatility, is economical and efficient.

[0030] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fluorescent magnetic particle flaw detection protection connection device for an unconventional flange crankshaft, characterized in that: It includes a buckle (2), a rotating shaft (4) and a connecting flange (6); One end of the rotating shaft (4) is connected to the magnetizing device (1) and is located on the idler (5) of the machine body; The buckle (2) is sleeved on the outer side surface of the rotating shaft (4). A connecting pin (41) is provided at one end of the rotating shaft (4). The connecting pin (41) is inserted into the connecting pin hole (62) on the connecting flange (6). The buckle (2) and the connecting flange (6) are connected by threads; One end of the connecting flange (6) is connected to the flange on the crankshaft (3).

2. The fluorescent magnetic particle flaw detection protection connection device for an unconventional flange crankshaft according to claim 1, characterized in that: The rotating shaft (4) is a T-shaped stepped shaft. The size of the small end of the T-shaped stepped shaft is adapted to the clamping range of the fluorescent magnetic particle flaw detector. Three connecting pins (41) are evenly distributed at the large end of the T-shaped stepped shaft and are adapted to the size of the connecting pin holes (62) on the connecting flange (6).

3. A kind of unconventional flange crankshaft fluorescent magnetic particle flaw detection protection connection device according to claim 1, characterized in that: The connecting flange (6) is made of a conductive material.

4. A non-conventional flange crankshaft fluorescent magnetic particle flaw detection protection connection device according to claim 1 or 3, characterized in that: Three curved waist-shaped holes (61) are also evenly distributed on the connecting flange (6) for installing bolts to connect with the flange on the crankshaft (3).

5. A non-conventional flange crankshaft fluorescent magnetic particle flaw detection protection connection device according to claim 1, characterized in that: An inner hole (21) is provided at the middle position of the buckle (2) for sleeving on the outer side surface of the rotating shaft (4). An internal thread (22) is provided on the inner side surface of the buckle (2). An external thread (63) adapted to the internal thread (22) of the buckle (2) is provided on the outer side surface of the connecting flange (6).

6. The fluorescent magnetic particle flaw detection protection connection device for an unconventional flange crankshaft according to claim 1 or 3, characterized in that: The diameter of the connecting flange (6) is larger than the diameter of the flange on the crankshaft (3).

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