Explosion hardening device and method for high manganese steel frog

Abstract

The invention relates to the technical field of high manganese steel frog hardening, and discloses a high manganese steel frog explosion hardening device and method.The device comprises a frog side explosion mechanism, and the frog side explosion mechanism, a frog internal explosion mechanism and a frog top explosion mechanism jointly provide impact force needed by hardening for the outer surface of a high manganese steel frog; the surface of the high-manganese steel frog is subjected to heat treatment through high temperature and high impact force generated by explosion of the explosive, metal on the surface of the high-manganese steel frog is subjected to plastic deformation and grain refinement, the physical structure of the metal on the surface of the frog is changed, and therefore the surface hardness and abrasion resistance are improved. And pre-hardening heat treatment before use and post-hardening heat treatment after use of the explosion hardening device for the high-manganese steel frog are carried out through the explosion hardening method for the high-manganese steel frog, so that residual stress before hardening of the high-manganese steel frog is eliminated, plasticity is improved, microstress generated by explosion is released, and crack propagation is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of high manganese steel frog hardening, and in particular to a high manganese steel frog explosion hardening device and method. Background Art

[0002] Explosion hardening technology is a new type of metal material surface treatment technology developed based on the outstanding cold work hardening characteristics of high manganese steel and other metal materials. Under the shock wave generated by the explosion of explosives, plastic deformation or structural changes occur inside the high manganese steel workpiece, the surface and deep hardness of the workpiece are significantly improved, and the internal grains of the workpiece undergo a large amount of slip and refinement under the action of the explosion shock wave, which can simultaneously improve the tensile strength and impact toughness of the workpiece, improve the mechanical properties of the workpiece, and thus extend the service life of the workpiece.

[0003] This technology is to attach high-detonation-velocity special flexible explosives to the surface areas of high-manganese steel workpieces where wear resistance needs to be improved. The high pressure generated by the explosion of the explosives is used to increase the hardness of the workpiece surface, thereby improving wear resistance. At the same time, the toughness of the high-manganese steel is still maintained inside the workpiece, and the strong, tough and wear-resistant characteristics of high-manganese steel can be fully utilized.

[0004] However, the existing methods for hardening high manganese steel frogs include explosion hardening, shot peening, chemical heat treatment, etc., wherein in the process of explosion hardening of high manganese steel frogs, there are still the following technical problems to be solved:

[0005] In the previous hardening treatment of high manganese steel frogs, there was a lack of accurate positioning methods, which caused the frogs to shift during the hardening process, resulting in uneven hardening effects and affecting the performance and service life of the frogs. For example, some simple fixing methods may not ensure that the frogs remain in the correct position when subjected to the impact force generated by the explosion, resulting in excessive or insufficient local hardening.

[0006] In the existing explosion hardening technology, the layout of the explosion mechanism does not fully take into account the needs of different parts of the high manganese steel frog, resulting in uneven hardening of the frog surface and some parts not being sufficiently hardened, affecting the overall performance of the frog. For example, there is no targeted design of a suitable explosion mechanism for the top and both sides of the frog, resulting in insufficient improvement in the hardness of these parts. Summary of the invention

[0007] The purpose of the present invention is to provide a technical solution, by designing a mold suitable for high manganese steel frogs and installing a multi-directional explosion mechanism between the mold and the high manganese steel frogs to harden the surface of the high manganese steel frogs, so as to solve the problems in the prior art raised in the above background technology.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] A high manganese steel frog explosion hardening device, comprising a mold for explosion hardening of the high manganese steel frog, the mold comprising a lower mold, a side mold and an upper mold, the high manganese steel frog is arranged inside the lower mold, the side mold and the upper mold, and the top surface of the lower mold is provided with a frog limit groove for installing a base of the high manganese steel frog;

[0010] The inner sides of the side mold are adsorbed with frog side explosion mechanisms for exploding the two sides of the high manganese steel frog through magnetic attraction mechanisms;

[0011] An embedding groove is provided on the bottom surface of the upper mold, and a frog center filling body and a frog top explosion mechanism are inserted and installed in the embedding groove through a mortise and tenon mechanism. The frog internal explosion mechanism for explosion on both sides of the high manganese steel frog is adsorbed on the side walls of the frog center filling body through a magnetic attraction mechanism, and the frog top explosion mechanism is arranged on the side walls of the embedding groove;

[0012] The gaps formed between the frog internal explosion mechanism, the frog top explosion mechanism, the frog side explosion mechanism and the inside of the mold provide installation space required for the explosion of the high manganese steel frog, and the frog side explosion mechanism, the frog internal explosion mechanism and the frog top explosion mechanism jointly provide the impact force required for hardening the outer surface of the high manganese steel frog.

[0013] Preferably, the lower mold includes a lower slot and a positioning rod, the lower slots are respectively opened on both sides of the top surface of the lower mold, the positioning rods are fixedly arranged at the four corners of the top surface of the lower mold, and the lower mold is assembled with the side mold and the upper mold through the positioning rods.

[0014] Preferably, the side mold includes a first side mold and a second side mold, the first side mold is respectively integrally formed with a first tenon at both ends, the second side mold is provided with a first tenon groove at both ends, the two ends of the first side mold are connected by mortise and tenon joints between the first tenon and the tenon grooves at both ends of the second side mold, the first side mold and the second side mold are respectively provided with a first positioning hole at the top surface corner, the positioning rod is plugged into the inside of the first positioning hole, the first side mold and the second side mold are both integrally formed with a lower plug block on the bottom surface, and the lower plug block is plugged into the inside of the lower slot.

[0015] Preferably, second positioning holes are respectively provided at the corners of the bottom surface of the upper mold, and the positioning rod is inserted into the first positioning hole and then inserted into the second positioning hole, and is threadedly connected to the top threaded portion of the positioning rod through a nut, and the nut contacts the top surface of the upper mold to assemble and fix the lower mold, side mold and upper mold, and upper slots are provided on both sides of the bottom surface of the upper mold, and upper plug blocks are integrally formed on the top surfaces of the first side mold and the second side molds, and the upper plug blocks are inserted into the upper slots.

[0016] Preferably, the center filler of the frog is made of titanium alloy, and second tenons are integrally formed on both sides of the center filler of the frog, and second tenons are correspondingly provided on both sides of the bottom surface of the upper mold, and the second tenons and second tenons are connected by mortise and tenon joints. A dovetail groove is provided at the tail of the center filler of the frog according to the shape of the high manganese steel frog, and the surface of the dovetail groove and both sides of the center filler of the frog are adsorbed with the internal explosion mechanism of the frog through a magnetic attraction mechanism.

[0017] Preferably, the internal explosion mechanism of the frog includes a second explosive carrier plate, a honeycomb groove and an inner explosive piece, one side of the second explosive carrier plate is magnetically connected to the surface of the dovetail groove and the two sides of the frog center filling body through a magnetic attraction mechanism, and the other side surface of the second explosive carrier plate is provided with uniform honeycomb grooves, and the honeycomb grooves are all filled with inner explosive pieces.

[0018] Preferably, the upper mold is provided with third mortise grooves on both sides of the embedding groove, the frog top explosion mechanism comprises a first explosive carrier plate, a second silicon steel plate and a top explosive sheet, a third tenon is integrally formed on one side of the first explosive carrier plate, the third tenon and the third mortise groove are mortise and tenon connected, the other side of the first explosive carrier plate is magnetically connected to the second silicon steel plate through a magnetic attraction mechanism, a plurality of equidistant V-shaped grooves are provided on one side wall of the second silicon steel plate, and the second silicon steel plate is bonded to the top explosive sheet on one side wall of the V-shaped groove.

[0019] Preferably, the frog side explosion mechanism includes a first silicon steel plate and a side explosive column, one side of the first silicon steel plate is magnetically connected to the inner sides of the first side mold and the second side mold respectively through a magnetic attraction mechanism, and the other side wall of the first silicon steel plate is equidistantly provided with a plurality of arc grooves, and the plurality of arc grooves are each equipped with a side explosive column.

[0020] Preferably, the magnetic attraction mechanism includes a groove and a magnetic attraction sheet, the magnetic attraction sheet is arranged on the outer side walls of the center filling body of the fork, the magnetic attraction sheet is arranged in the dovetail groove opened at the tail of the center filling body of the fork, the magnetic attraction sheet is arranged on the side wall of the first explosive carrier plate, the magnetic attraction sheet is arranged on the inner side walls of the first side mold and the second side mold, the grooves are respectively opened on the side walls of the second explosive carrier plate, the second silicon steel plate and the first silicon steel plate, and the magnetic attraction sheet is plugged into the grooves.

[0021] The present invention also provides a method for explosive hardening of a high manganese steel frog, comprising the following steps:

[0022] S1, pre-hardening heat treatment;

[0023] S2, mold pre-assembly and preparation;

[0024] S3, installation of high manganese steel frog and explosion mechanism;

[0025] S4, mold closing and locking;

[0026] S5, Explosion hardening execution;

[0027] S6. Post-hardening heat treatment.

[0028] Technical effects and advantages of the present invention: Compared with the prior art, the explosive hardening device and method of a high manganese steel frog proposed by the present invention has the following advantages:

[0029] 1. The present invention provides a frog limit groove for installing the base of the high manganese steel frog through the top surface of the lower mold. The frog limit groove matches the shape of the high manganese steel frog base and can accurately position the base of the high manganese steel frog. At the same time, the lower slot and positioning rod of the lower mold respectively cooperate with the lower plug-in block and the first positioning hole of the side mold and the second positioning hole of the upper mold to realize the plug-in assembly of various parts of the mold. After the upper mold is connected to the side mold and the lower mold through the positioning rod, it is tightened by the threaded connection of the nut and the positioning rod, so that the entire mold becomes a tight whole. At the same time, the plug-in connection of the upper slot and the upper plug-in block further enhances the stability of the mold. For example, in the actual explosion hardening operation, the mold with this structural design can withstand the impact force generated by the explosion, keep the various parts of the mold tightly connected, and will not loosen or move, thereby ensuring the accuracy and quality of the explosion hardening;

[0030] 2. The invention has frog side explosion mechanisms for explosions on both sides of the high manganese steel frog adsorbed by magnetic suction mechanisms on both sides of the inner side of the side mold, an embedding groove is provided on the bottom surface of the upper mold, a frog center filling body and a frog top explosion mechanism are installed in the embedding groove by mortise and tenon mechanisms, and frog internal explosion mechanisms for explosions on both sides of the high manganese steel frog are adsorbed by magnetic suction mechanisms on both side walls of the frog center filling body, and these explosion mechanisms apply impact forces to the outer surface of the high manganese steel frog from different directions, so that the surface of the high manganese steel frog can be heat-treated, and the high temperature and high impact force generated by the explosion of the explosives can be used to heat the frog. , to heat treat the surface of the high manganese steel frog, so that the metal on the surface of the high manganese steel frog undergoes plastic deformation and grain refinement, to change the physical structure of the metal on the surface of the frog, thereby improving the surface hardness and wear resistance. In practical applications, the shock waves generated by the side explosive columns of the double-sided explosion mechanism act on both sides of the high manganese steel frog, the shock waves generated by the explosion of the inner explosive pieces of the frog's internal explosion mechanism act on both sides of the frog, and the shock waves generated by the explosion of the top explosive pieces of the frog's top explosion mechanism act on the top of the frog, achieving uniform hardening treatment of all parts of the frog and improving the overall performance of the frog. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the mold assembly of the present invention;

[0032] Figure 2It is a structural schematic diagram of the mold of the present invention in a disassembled state;

[0033] Figure 3 It is a structural schematic diagram of the lower mold of the present invention;

[0034] Figure 4 It is a schematic structural diagram of the side mold of the present invention;

[0035] Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0036] Figure 6 It is a schematic structural diagram of the assembly of the upper mold and frog center filling body, frog top explosion mechanism, and frog internal explosion mechanism of the present invention;

[0037] Figure 7 It is a structural schematic diagram of the upper mold and frog center filling body, frog top explosion mechanism, and frog internal explosion mechanism in the disassembled state of the present invention;

[0038] Figure 8 It is a structural schematic diagram of the frog top explosion mechanism of the present invention;

[0039] Fig. 9 A schematic diagram of the structure of the protective cover and the mold installation demonstration of the present invention;

[0040] Fig.10 It is a schematic structural diagram of a cross-section of the protective cover of the present invention.

[0041] In the figure:

[0042] 1. Lower die; 11. Lower slot; 12. Positioning rod; 13. Frog limit slot;

[0043] 2. Side mold; 21. First side mold; 22. First tenon; 23. Second side mold; 24. First tenon groove; 25. Upper insert block; 26. Lower insert block; 27. First positioning hole;

[0044] 3. Upper die; 31. Second positioning hole; 32. Second mortise and tenon groove; 33. Third mortise and tenon groove; 34. Upper slot; 35. Embedding slot;

[0045] 4. High manganese steel frog;

[0046] 5. frog side explosion mechanism; 51. first silicon steel plate; 52. arc groove; 53. side explosive column;

[0047] 6. frog center filling body; 61. second tenon; 62. dovetail groove;

[0048] 7. frog top explosion mechanism; 71. first explosive carrier plate; 72. second silicon steel plate; 73. groove; 74. magnetic attraction sheet; 75. top explosive sheet; 76. third tenon; 77. V-shaped groove;

[0049] 8. Internal explosion mechanism of frog; 81. Second explosive carrier plate; 82. Honeycomb groove; 83. Inner explosive sheet;

[0050] 9, protective cover; 91, outer layer; 92, middle layer; 93, inner layer; 94, hatch;

[0051] 10. Feeding roller device. DETAILED DESCRIPTION

[0052] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Various examples may omit, replace, or add various processes or components as needed. In addition, the features described in some examples may also be combined in other examples.

[0053] Embodiment 1: The invention provides Figures 1 to 10 As shown, a high manganese steel frog explosion hardening device includes a mold for explosion hardening of a high manganese steel frog 4, such as Figure 1 and Figure 2 As shown, the mold includes a lower mold 1, a side mold 2 and an upper mold 3, and a high manganese steel frog 4 is arranged inside the lower mold 1, the side mold 2 and the upper mold 3. The mold is an integral structure, and the high manganese steel frog 4 is surrounded inside by the combination of the lower mold 1, the side mold 2 and the upper mold 3 to form a relatively closed space for explosive hardening operation. The top surface of the lower mold 1 is provided with a frog limiting groove 13 for installing the base of the high manganese steel frog 4. The frog limiting groove 13 of the lower mold 1 is used to accurately position the base of the high manganese steel frog 4 so that it has an accurate position in the mold;

[0054] During the use of high manganese steel frog 4, its surface needs to have high hardness and wear resistance to extend its service life. The explosion hardening technology can harden the frog surface through the impact force generated by the explosion, so as to heat treat the high manganese steel frog 4. The role of the mold is to provide a stable support and positioning structure for the high manganese steel frog 4, and also provide a suitable space for the arrangement of explosives, such as Figure 3 As shown, the frog limit groove 13 matches the shape of the base of the high manganese steel frog 4, which can ensure that the frog will not be displaced in the mold, ensure the uniformity of the explosion hardening effect, help improve the accuracy and quality of explosion hardening, and lay the foundation for subsequent explosion operations.

[0055] Specifically, the lower mold 1 includes a lower slot 11 and a positioning rod 12. The lower slots 11 are respectively opened on both sides of the top surface of the lower mold 1. The positioning rods 12 are fixedly arranged at the four corners of the top surface of the lower mold 1. The lower mold 1 is plugged and assembled with the side mold and the upper mold 3 through the positioning rods 12. Figure 4 As shown, the side mold 2 includes a first side mold 21 and a second side mold 23, and the two ends of the first side mold 21 are respectively integrally formed with a first tenon 22, and the two ends of the second side mold 23 are provided with a first tenon groove 24. The two ends of the first side mold 21 are mortise and tenoned by the tenon 22 and the tenon grooves at both ends of the second side mold 23. The first side mold 21 and the second side mold 23 of the side mold 2 are combined together through the tenon and tenon structure (the first tenon 22 and the first tenon groove 24) to form a complete side mold 2 structure, and the first side mold 21 and the second side mold 23 are respectively provided with a first positioning hole 27 at the top corners, and the positioning rod 12 is plugged into the inside of the first positioning hole 27. The bottom surfaces of the first side mold 21 and the second side mold 23 are both integrally formed with a lower plug block 26, and the lower plug block 26 is plugged into the inside of the lower slot 11, as shown in FIG. Figure 7 As shown, second positioning holes 31 are respectively provided at the corners of the bottom surface of the upper mold 3. After the positioning rod 12 is plugged into the first positioning hole 27, it is inserted into the second positioning hole 31 and is threadedly connected to the top threaded portion of the positioning rod 12 through a nut. The nut contacts the top surface of the upper mold 3 to assemble and fix the lower mold 1, the side mold and the upper mold 3. Upper slots 34 are provided on both sides of the bottom surface of the upper mold 3. The top surfaces of the first side mold 21 and the second side mold 23 are integrally formed with upper plug blocks 25, and the upper plug blocks 25 are plugged into the upper slots 34.

[0056] The lower slot 11 and the positioning rod 12 of the lower mold 1 cooperate with the lower insert block 26 and the first positioning hole 27 of the side mold 2 and the second positioning hole 31 of the upper mold 3 respectively to realize the plug-in assembly of the various parts of the mold. After the upper mold 3 is connected with the side mold 2 and the lower mold 1 through the positioning rod 12, it is tightened by the threaded connection of the nut and the positioning rod 12, so that the entire mold becomes a tight whole. The plug-in connection of the upper slot 34 and the upper insert block 25 further enhances the stability of the mold, the purpose is to facilitate the assembly and disassembly of the mold, and at the same time ensure that the mold has sufficient strength and stability during the explosion process. The mortise and tenon structure is a traditional and effective connection method, which can disperse and withstand the impact force generated by the explosion to a certain extent. The cooperation of the positioning rod 12 and the positioning hole and the plug-in connection of the insert block and the slot ensure the accurate alignment and tight connection between the various parts of the mold, prevent loosening or displacement during the explosion process, and during the explosion hardening process, the stable mold structure can ensure that the impact force generated by the explosive acts evenly on the high manganese steel frog 4, improving the consistency and reliability of the hardening effect. At the same time, the structure that is easy to disassemble is also conducive to the maintenance and reuse of the mold.

[0057] The inner sides of the side mold 2 are adsorbed with frog side explosion mechanisms 5 for exploding on both sides of the high manganese steel frog 4 through a magnetic attraction mechanism. Figure 4 and Figure 5 As shown, the frog side explosion mechanism 5 includes a first silicon steel plate 51 and a side explosive column 53. One side of the first silicon steel plate 51 is magnetically connected to the inner side of the first side mold 21 and the second side mold 23 through a magnetic attraction mechanism. The other side wall of the first silicon steel plate 51 is equidistantly provided with a plurality of arc grooves 52. The plurality of arc grooves 52 are each equipped with a side explosive column 53. The magnetic attraction mechanism uses magnetic force to adsorb the first silicon steel plate 51 to the inner side of the side mold 2 to fix it in a suitable position. The arc groove 52 on the first silicon steel plate 51 is used to place the side explosive column 53. When the explosive explodes, the shock wave generated by the side explosive column 53 will act on both sides of the high manganese steel frog 4 to harden its surface. The design of the arc groove 52 can make the side explosive column 53 more closely arranged and can more effectively transmit the shock wave to both sides of the high manganese steel frog 4 during the explosion.

[0058] like Figure 6 and Figure 7 As shown, an embedding groove 35 is provided on the bottom surface of the upper mold 3, and a frog center filling body 6 and a frog top explosion mechanism 7 are installed in the embedding groove 35 through a mortise and tenon mechanism. The side walls of the frog center filling body 6 are adsorbed with a frog internal explosion mechanism 8 for explosions on both sides of the high manganese steel frog 4 through a magnetic attraction mechanism. The frog center filling body 6 is made of titanium alloy. Because titanium alloy has the advantages of high strength, low density and good corrosion resistance, it can withstand a certain impact force during the explosion process and reduce the overall weight of the mold. Second tenons 61 are integrally formed on both sides of the frog center filling body 6, and second tenons 32 are correspondingly provided on both sides of the bottom surface of the upper mold 3. The second tenons 61 and the second tenons 32 are connected by mortise and tenon. A dovetail groove 62 is provided at the tail of the frog center filling body 6 according to the shape of the high manganese steel frog 4, and the surface of the dovetail groove 62 and both sides of the frog center filling body 6 are adsorbed with the frog internal explosion mechanism 8 through a magnetic attraction mechanism.

[0059] The embedding groove 35 of the upper mold 3 is connected to the frog center filling body 6 through the mortise and tenon mechanism (the second tenon 61 and the second tenon groove 32), so that it is fixed to the bottom surface of the upper mold 3. The dovetail groove 62 and the two side surfaces of the frog center filling body 6 are attracted to the frog internal explosion mechanism 8 through the magnetic attraction mechanism. When the explosive explodes, the shock wave generated by the frog internal explosion mechanism 8 will act on the inner two sides of the high manganese steel frog 4 to achieve hardening of the inner two side surfaces.

[0060] like Figure 7As shown, the frog internal explosion mechanism 8 includes a second explosive carrier plate 81, a honeycomb groove 82 and an inner explosive piece 83. One side of the second explosive carrier plate 81 is magnetically connected to the surface of the dovetail groove 62 and the two sides of the frog center filling body 6 through a magnetic attraction mechanism. The other side surface of the second explosive carrier plate 81 is provided with uniform honeycomb grooves 82, and the inner explosive pieces 83 are installed in the honeycomb grooves 82. The design of the honeycomb grooves 82 enables the inner explosive pieces 83 to be evenly arranged on the second explosive carrier plate 81. When the inner explosive pieces 83 explode, the generated shock waves will evenly act on the inner two side surfaces of the high manganese steel frog 4 to achieve hardening. The design of the frog internal explosion mechanism 8 ensures that the inner two side surfaces of the high manganese steel frog 4 can be evenly hardened, thereby improving the overall performance of the frog. The combination of the honeycomb grooves 82 and the inner explosive pieces 83 and the application of the magnetic attraction mechanism make the explosion hardening process more controllable and efficient, and can meet the hardening requirements of the high manganese steel frog 4 under different working conditions.

[0061] like Figure 7 and Figure 8 As shown, the frog top explosion mechanism 7 is arranged on the side walls of the embedding groove 35, the upper mold 3 is respectively provided with third mortise grooves 33 on both sides of the embedding groove 35, the frog top explosion mechanism 7 comprises a first explosive carrier plate 71, a second silicon steel plate 72 and a top explosive piece 75, one side of the first explosive carrier plate 71 is integrally formed with a third tenon 76, the third tenon 76 and the third mortise groove 33 are mortise-jointed, the other side of the first explosive carrier plate 71 is magnetically connected to the second silicon steel plate 72 through a magnetic attraction mechanism, a side wall of one side of the second silicon steel plate 72 is provided with a plurality of equidistant V-shaped grooves 77, and a side wall of the second silicon steel plate 72 located at one side of the V-shaped groove 77 is bonded to the top explosive piece 75;

[0062] The first explosive carrier plate 71 is mortise-joined with the third mortise groove 33 of the upper mold 3 through the third tenon 76, and fixed on the side walls of the embedding groove 35. The first explosive carrier plate 71 is connected with the second silicon steel plate 72 through the magnetic attraction mechanism, and the V-shaped groove 77 on the second silicon steel plate 72 is used to bond the top explosive sheet 75. When the top explosive sheet 75 explodes, the generated shock wave will act on the top of the high manganese steel frog 4 to achieve hardening of the top surface. The dual fixing method of mortise-joint joint and magnetic attraction mechanism ensures the stability and reliability of the frog top explosion mechanism 7. At the same time, the design of the V-shaped groove 77 can more effectively transmit the shock wave to the top of the high manganese steel frog 4 during the explosion. The setting of the frog top explosion mechanism 7 enables the top of the high manganese steel frog 4 to be hardened, further improving the overall hardness and wear resistance of the frog.

[0063] It is worth noting that if Figure 8As shown, the magnetic attraction mechanism includes a groove 73 and a magnetic attraction sheet 74, the magnetic attraction sheet 74 is arranged on the outer side walls of the frog center filling body 6, the magnetic attraction sheet 74 is arranged in the dovetail groove 62 opened at the tail of the frog center filling body 6, the magnetic attraction sheet 74 is arranged on the side wall of the first explosive carrier plate 71, the magnetic attraction sheet 74 is arranged on the inner side walls of the first side mold 21 and the second side mold 23, the grooves 73 are respectively opened on the side walls of the second explosive carrier plate 81, the second silicon steel plate 72 and the first silicon steel plate 51, and the magnetic attraction sheet 74 is plugged into the groove 73;

[0064] The magnetic attraction mechanism utilizes the interaction between the magnetic attraction sheet 74 and the groove 73 to attract the various components together through magnetic force. The magnetic attraction sheet 74 is usually made of magnetic material, and the groove 73 provides a fixed position for the magnetic attraction sheet 74. When the magnetic attraction sheet 74 is inserted into the groove 73, the magnetic force makes them tightly connected to achieve the fixation of the components. Compared with the traditional bolt connection or other fixing methods, the magnetic attraction mechanism does not require additional tools, and the installation and disassembly process is simple, which can greatly improve the work efficiency. The application of the magnetic attraction mechanism makes the assembly of the mold and the installation of the explosion mechanism more flexible and efficient. It can quickly adjust the position and combination of the components according to different work requirements, and adapt to the explosion hardening operation of high manganese steel frogs 4 of different specifications.

[0065] The gap formed between the frog internal explosion mechanism 8, the frog top explosion mechanism 7, the frog side explosion mechanism 5 and the inside of the mold provides the installation space required for the explosion of the high manganese steel frog 4, and the frog side explosion mechanism 5, the frog internal explosion mechanism 8 and the frog top explosion mechanism 7 jointly provide the impact force required for hardening the outer surface of the high manganese steel frog 4.

[0066] The gap between each explosion mechanism and the inside of the mold provides a space for placing the high manganese steel frog 4, ensuring that the frog can be fully affected by the shock wave generated by the explosion of the explosive during the explosion process. The frog side explosion mechanism 5, the frog internal explosion mechanism 8 and the frog top explosion mechanism 7 respectively apply impact force to the outer surface of the high manganese steel frog 4 from different directions, causing the metal on the frog surface to undergo plastic deformation and grain refinement, thereby changing the physical structure of the metal on the surface of the high manganese steel frog 4, thereby improving the surface hardness and wear resistance.

[0067] A further optional preferred solution is: Fig. 9 and Fig.10As shown, in order to prevent sudden safety hazards, after the mold and the high manganese steel frog 4 are assembled, they are fed into the protective cover 9 from the opening 94 of the protective cover 9 through the feeding roller device 10. The protective cover 9 is fixed on the ground in a hemispherical shape. The protective cover 9 is divided into three layers, the outer layer 91 is made of steel plate, the middle layer 92 is an energy-absorbing material, such as porous metal foam, and the inner layer 93 is a heat-insulating layer. When the high manganese steel frog 4 is explosively hardened by the mold, if an accident occurs, the shock wave generated by the protective cover 9 can be completely covered, so as to improve the safety of the use of the explosion hardening device of the high manganese steel frog 4.

[0068] Embodiment 2: Based on Embodiment 1, in order to specifically implement the explosion hardening treatment of the high manganese steel frog, the present invention further provides an explosion hardening method for the high manganese steel frog, comprising the following steps:

[0069] S1. Pre-hardening heat treatment: before the explosion hardening treatment of the high manganese steel frog 4, the high manganese steel frog 4 is subjected to solid solution treatment (heating to 1050°C and water quenching) to eliminate residual stress and improve plasticity.

[0070] S2, mold pre-assembly and preparation;

[0071] Position the lower die 1, place the lower die 1 horizontally on the explosion-proof base, ensure that the frog limit groove 13 on its top surface matches the shape of the high manganese steel frog 4 base, check the cleanliness of the lower slot 11 and the positioning rod 12, and avoid foreign matter affecting the assembly accuracy;

[0072] The side mold 2 is assembled by combining the first side mold 21 and the second side mold 23 through mortise and tenon joints, inserting the first tenons 22 at both ends of the first side mold 21 into the first tenon grooves 24 at both ends of the second side mold 23, inserting the lower insert block 26 of the assembled side mold 2 into the lower slot 11 of the lower mold 1, and fixing it by plugging the positioning rod 12 into the first positioning hole 27;

[0073] The upper mold 3 is pre-assembled, the frog center filling body 6 is mortise-and-tenoned with the second tenon 61 and the second tenon groove 32 of the upper mold 3, the frog top explosion mechanism 7 is installed on both sides of the embedding groove 35, and the third tenon 76 is inserted into the third tenon groove 33 of the upper mold 3 to ensure that the first explosive carrier plate 71 and the second silicon steel plate 72 are fixed by the magnetic suction sheet 74;

[0074] S3, high manganese steel frog 4 and explosion mechanism are installed;

[0075] Position the high manganese steel frog 4, and embed the base of the high manganese steel frog 4 into the frog limit groove 13 of the lower mold 1, ensuring that its axis is aligned with the center of the mold;

[0076] The side explosion mechanism is installed by adsorbing the first silicon steel plate 51 to the inner sides of the first side mold 21 and the second side mold 23 through the magnetic suction sheet 74, and evenly placing the side explosive columns 53 in the arc groove 52 to ensure that the spacing error is ≤1mm;

[0077] The internal explosion mechanism is installed by adsorbing the second explosive carrier plate 81 to the dovetail groove 62 and the two side surfaces of the frog center filling body 6 through the magnetic suction sheet 74, and loading the inner explosive sheet 83 into the honeycomb groove 82 to ensure that each explosive sheet is tightly fitted to the honeycomb groove 82;

[0078] The top explosion mechanism is fixed, the side wall of the V-shaped groove 77 of the second silicon steel plate 72 is bonded to the top explosive sheet 75, and the plugging firmness of the magnetic sheet 74 and the groove 73 is checked;

[0079] S4, mold closing and locking;

[0080] Assemble the upper mold 3, press the pre-assembled upper mold 3 downward, align and plug the second positioning hole 31 with the positioning rod 12, and insert the upper plug block 25 into the upper slot 34 of the upper mold 3 to ensure that the side mold 2 and the upper mold 3 fit tightly;

[0081] Tighten the bolts, install the nut on the top threaded part of the positioning rod 12, tighten until the nut contacts the top surface of the upper die 3, and apply a torque of 10-15N·m;

[0082] S5, Explosion hardening execution;

[0083] Using electronic detonators for staged detonation:

[0084] First-stage detonation: the side explosive column 53 and the inner explosive piece 83 are detonated synchronously with a delay of 0ms;

[0085] Secondary detonation: The top explosive piece 75 is detonated with a delay of 0.2ms to enhance the shock wave superposition effect. The peak shock wave pressure is controlled at 15-25GPa, and the depth of the hardened layer reaches 10-15mm.

[0086] S6, post-hardening heat treatment, the high manganese steel frog 4 after the explosion is subjected to low temperature tempering (200-250℃ for 2h) to release the micro stress generated by the explosion and prevent crack propagation.

[0087] The embodiments of the present invention are described above, but the present invention is not limited to the above-mentioned specific implementation modes. The above-mentioned specific implementation modes are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms, all of which are within the protection of the present invention.

Claims

1. A high manganese steel frog explosion hardening device, characterized in that: The invention comprises a mould for explosive hardening of a high manganese steel frog (4), the mould comprising a lower mould (1), a side mould (2) and an upper mould (3), the high manganese steel frog (4) being arranged inside the lower mould (1), the side mould (2) and the upper mould (3), and the top surface of the lower mould (1) being provided with a frog limit groove (13) for mounting a base of the high manganese steel frog (4); Frog side explosion mechanisms (5) for exploding the two sides of the high manganese steel frog (4) are adsorbed on both sides of the side mold (2) through a magnetic attraction mechanism; The bottom surface of the upper mold (3) is provided with an embedding groove (35), in which a frog center filling body (6) and a frog top explosion mechanism (7) are inserted and installed through a mortise and tenon mechanism, and the frog internal explosion mechanism (8) for explosion on both sides of the high manganese steel frog (4) is adsorbed on the side walls of the embedding groove (35) through a magnetic attraction mechanism, and the frog top explosion mechanism (7) is arranged on the side walls of the embedding groove (35); The gap formed between the frog internal explosion mechanism (8), the frog top explosion mechanism (7), the frog side explosion mechanism (5) and the inside of the mold provides an installation space required for the explosion of the high manganese steel frog (4), and the frog side explosion mechanism (5), the frog internal explosion mechanism (8) and the frog top explosion mechanism (7) together provide the impact force required for hardening the outer surface of the high manganese steel frog (4).

2. The high manganese steel frog explosion hardening device according to claim 1, characterized in that: The lower mold (1) comprises a lower slot (11) and a positioning rod (12), wherein the lower slot (11) is respectively provided on both sides of the top surface of the lower mold (1), and the positioning rod (12) is fixedly arranged at four corners of the top surface of the lower mold (1), and the lower mold (1) is plug-connected and assembled with the side mold and the upper mold (3) via the positioning rod (12).

3. The high manganese steel frog explosion hardening device according to claim 2, characterized in that: The side mold (2) comprises a first side mold (21) and a second side mold (23); first tenons (22) are integrally formed at both ends of the first side mold (21); first tenons (24) are provided at both ends of the second side mold (23); the two ends of the first side mold (21) are mortise and tenoned with the tenons (22) and the tenons (24) at both ends of the second side mold (23); first positioning holes (27) are respectively provided at the top corners of the first side mold (21) and the second side mold (23); the positioning rods (12) are plugged into the inside of the first positioning holes (27); lower insert blocks (26) are integrally formed on the bottom surfaces of the first side mold (21) and the second side mold (23); the lower insert blocks (26) are plugged into the inside of the lower slot (11).

4. The high manganese steel frog explosion hardening device according to claim 3, characterized in that: Second positioning holes (31) are respectively provided at the bottom corners of the upper mold (3); the positioning rod (12) is inserted into the first positioning hole (27) and then inserted into the second positioning hole (31), and is threadedly connected to the top of the positioning rod (12) through a nut; the nut contacts the top surface of the upper mold (3) to assemble and fix the lower mold (1), the side mold and the upper mold (3); upper slots (34) are provided on both sides of the bottom surface of the upper mold (3); upper plug blocks (25) are integrally formed on the top surfaces of the first side mold (21) and the second side mold (23); and the upper plug blocks (25) are inserted into the upper slots (34).

5. The high manganese steel frog explosion hardening device according to claim 4, characterized in that: The frog center filling body (6) is made of titanium alloy, and second tenons (61) are integrally formed on both sides of the frog center filling body (6), and second tenons (32) are correspondingly provided on both sides of the bottom surface of the upper mold (3), and the second tenons (61) and the second tenons (32) are connected by mortise and tenon joints, and a dovetail groove (62) is provided at the tail of the frog center filling body (6) according to the shape of the high manganese steel frog (4), and the frog internal explosion mechanism (8) is adsorbed on the surface of the dovetail groove (62) and on both sides of the frog center filling body (6) through a magnetic attraction mechanism.

6. The high manganese steel frog explosion hardening device according to claim 5, characterized in that: The frog internal explosion mechanism (8) comprises a second explosive carrier plate (81), a honeycomb groove (82) and an inner explosive piece (83), one side of the second explosive carrier plate (81) is magnetically connected to the surface of the dovetail groove (62) and the two sides of the frog center filling body (6) through a magnetic attraction mechanism, and the other side surface of the second explosive carrier plate (81) is provided with uniform honeycomb grooves (82), and the inner explosive pieces (83) are all installed in the honeycomb grooves (82).

7. The high manganese steel frog explosive hardening device according to claim 6, characterized in that: The upper mold (3) is provided with third tenons (33) on both sides of the embedding groove (35), and the frog top explosion mechanism (7) comprises a first explosive carrier plate (71), a second silicon steel plate (72) and a top explosive sheet (75). A third tenon (76) is integrally formed on one side of the first explosive carrier plate (71), and the third tenon (76) is connected to the third tenon (33) by mortise and tenon joints. The other side of the first explosive carrier plate (71) is magnetically connected to the second silicon steel plate (72) through a magnetic attraction mechanism. A plurality of equidistant V-shaped grooves (77) are provided on one side wall of the second silicon steel plate (72), and the second silicon steel plate (72) is bonded to the top explosive sheet (75) on one side wall of the V-shaped groove (77).

8. The high manganese steel frog explosive hardening device according to claim 7, characterized in that: The frog side explosion mechanism (5) comprises a first silicon steel plate (51) and a side explosive column (53), one side of the first silicon steel plate (51) is magnetically connected to the inner sides of the first side mold (21) and the second side mold (23) respectively through a magnetic attraction mechanism, and the other side wall of the first silicon steel plate (51) is provided with a plurality of arc grooves (52) at equal intervals, and the plurality of arc grooves (52) are each equipped with a side explosive column (53).

9. The high manganese steel frog explosion hardening device according to claim 8, characterized in that: The magnetic attraction mechanism comprises a groove (73) and a magnetic attraction sheet (74); the magnetic attraction sheet (74) is arranged on the outer side walls of the frog center filling body (6); the magnetic attraction sheet (74) is arranged in a dovetail groove (62) opened at the tail of the frog center filling body (6); the magnetic attraction sheet (74) is arranged on the side wall of the first explosive carrier plate (71); the magnetic attraction sheet (74) is arranged on the inner side walls of the first side mold (21) and the second side mold (23); the groove (73) is respectively opened on the side walls of the second explosive carrier plate (81), the second silicon steel plate (72) and the first silicon steel plate (51); and the magnetic attraction sheet (74) is plugged into the groove (73).

10. A method for explosive hardening of a high manganese steel frog, using a device for explosive hardening of a high manganese steel frog as claimed in any one of claims 1 to 9, characterized in that: The steps include: S1, pre-hardening heat treatment; S2, mold pre-assembly and preparation; S3, installation of high manganese steel frog and explosion mechanism; S4, mold closing and locking; S5, Explosion hardening execution; S6. Post-hardening heat treatment.

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