CN212894848U

CN212894848U - Crankshaft impact strengthening device

Info

Publication number: CN212894848U
Application number: CN202021829087.0U
Authority: CN
Inventors: 孙军; 倪培相
Original assignee: Tianrun Industrial Technology Co ltd; Shandong University
Current assignee: Tianrun Industrial Technology Co ltd; Shandong University
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-04-06
Anticipated expiration: 2030-08-27

Abstract

The utility model provides a bent axle shock strengthening device is equipped with the base, be equipped with the support on the base, be equipped with the connecting plate on the support, be equipped with the cylinder on the connecting plate, be equipped with the impact beam on the cylinder, still be equipped with the fixed block on the base, be equipped with the test piece between fixed block and the base, be fixed connection between base and the support, support and connecting plate are fixed connection, the connecting plate is fixed connection with the cylinder, the impact beam is fixed connection with the piston rod of cylinder, be detachable fixed connection between fixed block and the base. The technical problems that an existing large-scale crankshaft fillet impact strengthening device is large in equipment investment, long in test period and not easy to quickly verify feasibility of an impact system are solved. The utility model discloses but wide application is in the fillet strikes process.

Description

Crankshaft impact strengthening device

Technical Field

The utility model relates to an impact device especially relates to a bent axle shock peening device.

Background

At present, the large-scale marine crankshaft is generally enhanced in strength by adopting a fillet rolling and quenching/gas nitriding composite strengthening treatment mode, but the rolling machine tools developed at home and abroad at present cannot meet the requirement of rolling force. In view of the current situation, a new strengthening means needs to be researched, a large crankshaft fillet impact strengthening device is designed and developed, the problem of strengthening the large crankshaft fillet is solved, and the strengthening treatment of the large crankshaft is realized. However, the large crankshaft impact strengthening device has large equipment investment and long test period, and the feasibility of an impact system is not easy to verify quickly.

Disclosure of Invention

The utility model discloses it is big to current large-scale bent axle fillet impact strengthening device equipment input, and the technical problem of the feasibility of impact system is difficult to verify fast to experimental cycle length, provides a short, the equipment input of experimental cycle is few, can verify the bent axle impact strengthening device of the impact effect of strikeing cylinder and impact rod comprehensively.

Therefore, the technical scheme of the utility model, a device is reinforceed in bent axle impact is equipped with the base, is equipped with the support on the base, is equipped with the connecting plate on the support, is equipped with the cylinder on the connecting plate, is equipped with the impact rod on the cylinder, still is equipped with the fixed block on the base, is equipped with the test piece between fixed block and the base, is fixed connection between base and the support, and support and connecting plate are fixed connection, and the connecting plate is fixed connection with the cylinder, and the piston rod that the impact rod and cylinder are fixed connection, is detachable fixed connection between fixed block and the base.

Preferably, the impact rod is provided with a positioning step, and the impact rod and the piston rod of the air cylinder are positioned on the end face through the positioning step.

Preferably, a pin hole is formed in one end of the impact rod, a drilling pin hole is formed in the piston rod of the air cylinder and the impact rod, and the impact rod is connected with the piston rod of the air cylinder through a pin.

Preferably, one end of the impact rod for impacting the test piece is a spherical surface.

Preferably, the base is connected with the support, the support is connected with the connecting plate, and the base is connected with the fixing block through bolts.

Preferably, the base, the support, the connecting plate and the fixing block are all made of high-strength steel plates, the impact rod is made of YG8, the hardness of the impact rod is greater than 60HRC, the material of the test piece is the same as that of the crankshaft, and the hardness of the test piece is the same as that of the crankshaft.

The utility model has the advantages that,

(1) the device has the advantages of simple structure, convenience in installation and low manufacturing cost, can quickly verify the impact performance of the impact rod and the air cylinder, and then transfers the air cylinder, the impact rod and the like to a large-scale crankshaft for impact test after successful verification, so that the test period is shortened, the cost waste is reduced, and the one-time success of fillet impact reinforcement can be ensured;

(2) the test piece is fixed on the base through the fixing block, the impact rod is fixed on the piston rod, and the impact rod impacts the test piece under the action of the piston rod, so that the impact rod can act on the relatively accurate position of the test piece in the impact process;

(3) one end of the impact rod is designed into a spherical end face, and the requirement of the spherical end face is consistent with the requirement of actually impacting a crankshaft fillet, so that the accuracy of impact verification can be ensured;

(4) the impact rod and the piston rod are matched with a drilled pin hole, a pin is arranged in the pin hole and used for ensuring the connection of the impact rod and the piston rod, a positioning step is arranged on the impact rod, the impact rod and the piston rod of the air cylinder are positioned on the end face through the positioning step, and the force of the piston rod is fully ensured to act on a test piece through the impact rod.

Drawings

Fig. 1 is a schematic front view of an embodiment of the present invention;

fig. 2 is a left side view structure diagram of the embodiment of the present invention;

fig. 3 is a schematic perspective view of an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an impact bar according to an embodiment of the present invention.

The symbols in the drawings illustrate that:

1. a base; 2. a support; 3. a cylinder; 4. a connecting plate; 5. an impact bar; 6. a fixed block; 7. a test piece; 8. spherical surface; 9. a pin hole; 10. and positioning the step.

Detailed Description

The present invention will be further described with reference to the following examples.

As shown in fig. 1-3, a crankshaft impact strengthening device is provided with a base 1, a support 2 is arranged on the base 1, a connecting plate 4 is arranged on the support 2, a cylinder 3 is arranged on the connecting plate 4, an impact rod 5 is arranged on the cylinder 3, a fixing block 6 is further arranged on the base 1, a test piece 7 is arranged between the fixing block 6 and the base 1, the base 1 and the support 2 are fixedly connected, the support 2 and the connecting plate 4 are fixedly connected, the connecting plate 4 and the cylinder 3 are fixedly connected, the impact rod 5 and a piston rod of the cylinder 3 are fixedly connected, and the fixing block 6 and the base 1 are detachably fixedly connected. The base 1 and the support 2, the support 2 and the connecting plate 4, and the base 1 and the fixing block 6 are connected through bolts. The base 1, the support 2, the connecting plate 4 and the fixing block 6 are all made of high-strength steel plates, the impact rod 5 is made of YG8, the hardness of the impact rod 5 is larger than 60HRC, the test piece 7 is made of 42CrMo material which is the same as the crankshaft and is made of the same heat treatment process, and the surface hardness of the treated test piece 7 is 50-55 HRC.

The test piece 7 is fixed on the base 1 through the fixing block 6, the impact rod 5 is fixed on the piston rod, the test piece 7 is impacted under the action of the piston rod, and the impact rod 5 can be guaranteed to act on the relatively accurate position of the test piece 7 in the impact process.

As shown in fig. 4, a positioning step 10 is arranged on the impact rod 5, and a spherical surface 8 is arranged at one end of the impact rod 5, which is used for impacting a test piece 7, and is consistent with the requirement of actually impacting a crankshaft fillet, so that the accuracy of impact verification can be ensured; the impact rod 5 is provided with a pin hole 9 at one end, a piston rod of the cylinder 3 is provided with a drilled pin hole together with the impact rod 5, the impact rod 5 is connected with the piston rod of the cylinder 3 through a pin, the pin only plays a role in connection in the impact process, the impact rod 5 and the piston rod of the cylinder 3 are positioned at the end face through a positioning step 10, and the reaction force generated by instantaneous impact of the impact rod 5 and acting on the impact rod 5 is transmitted to the piston rod to bear through the end face formed by the positioning step. In the working process, the power of the impact rod 5 comes from the cylinder 3, and the cylinder 3 drives the piston rod to reciprocate to realize the impact action of the impact rod 5 on the test piece 7. The cylinder is the whole impact process power output source and can provide very large instantaneous impact load to the impact rod 5. The impact rod 5 moves in an accelerating way under the action of impact force to carry out instantaneous impact on the test piece 7, so that the test piece 7 is subjected to plastic deformation under the action of the instantaneous impact force to generate residual compressive stress, and the effect of impact reinforcement is achieved.

After the device installation is accomplished, external compressed air gets into in the cylinder 3, drives the piston rod motion of cylinder 3, and the piston rod front end of cylinder 3 links to each other with impact rod 5, and impact rod 5 accelerated motion carries out instantaneous impact to test piece 7 under the pressure effect to make test piece 7 take place plastic deformation under the instantaneous impact force effect and produce residual compressive stress, detect the impact effect through the residual stress that detects the impact point. After impact, the surface of the test piece has obvious impact traces, the surface residual stress can reach about-900 MPa, the requirement of crankshaft impact reinforcement can be met, and the impact device can judge that the preset impact reinforcement effect is achieved.

The device simple structure, simple to operate, low in manufacturing cost can verify impact property of impact rod 5 and cylinder 3 fast, verifies and carries out the impact test again with cylinder 3 and impact rod 5 etc. to large-scale bent axle after succeeding in, has shortened test cycle, has reduced the cost extravagant, can ensure the one-off success of fillet shock strengthening.

However, the above description is only an embodiment of the present invention, and the scope of the present invention should not be limited thereto, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.

Claims

1. The utility model provides a bent axle shock peening device, its characterized in that is equipped with the base, be equipped with the support on the base, be equipped with the connecting plate on the support, be equipped with the cylinder on the connecting plate, be equipped with the impact bar on the cylinder, still be equipped with the fixed block on the base, the fixed block with be equipped with the test piece between the base, the base with be fixed connection between the support, the support with the connecting plate is fixed connection, the connecting plate with the cylinder is fixed connection, the impact bar with the piston rod of cylinder is fixed connection, the fixed block with be detachable fixed connection between the base.

2. The crankshaft impact reinforcement device according to claim 1, wherein the impact rod is provided with a positioning step, and the impact rod and the piston rod of the cylinder are positioned at the end face by the positioning step.

3. The crankshaft impact reinforcement device according to claim 1, wherein a pin hole is formed at one end of the impact rod, a drilled pin hole is formed in a piston rod of the cylinder and the impact rod, and the impact rod is connected with the piston rod of the cylinder through a pin.

4. The crankshaft impact reinforcement device according to claim 1, characterized in that one end of the impact rod for impacting the test piece is a spherical surface.

5. The crankshaft impact reinforcement device according to claim 1, wherein the base is connected with the bracket, the bracket is connected with the connecting plate, and the base is connected with the fixing block through bolts.

6. The crankshaft impact strengthening device according to claim 1, wherein the base, the bracket, the connecting plate and the fixing block are all made of high-strength steel plates, the impact rod is made of YG8, the hardness of the impact rod is greater than 60HRC, the material of the test piece is the same as that of the crankshaft, and the hardness of the test piece is the same as that of the crankshaft.