Induction brazing device for welding wear-resistant layer on detachable outer roller sleeve

Abstract

The utility model discloses an induction brazing device for welding a wear-resistant layer on a detachable outer roller sleeve. The induction brazing device comprises an induction brazing tool, the induction brazing tool comprises an upper die, a lower die, a lifting mechanism and an induction brazing heating mechanism. A lower groove is formed in the lower die, the detachable and replaceable outer roller sleeve is tightly plugged in the lower groove through a plug plate, a wear-resistant structure is placed on the upper surface of the detachable and replaceable outer roller sleeve, and the space between the wear-resistant structure and the detachable and replaceable outer roller sleeve is filled with welding flux; the telescopic end of the lifting mechanism is connected with the upper die, the upper die is connected with a pressing plate, the lower surface of the upper die is connected with a heating wire in the induction brazing heating mechanism, and when the pressing plate of the upper die is pressed on the abrasion-resistant structure in the lower die, a gap is formed between the heating wire and the abrasion-resistant structure. The abrasion-resistant structure can be welded to the outer surface of the detachable outer roller sleeve in an induction brazing mode, the welding time is short, meanwhile, the stress influence is reduced, damage to the detachable outer roller sleeve is reduced, and the service life of the detachable outer roller sleeve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical mill roller sleeves, and specifically relates to an induction brazing device for welding a wear-resistant layer on a detachable outer roller sleeve. Background Art

[0002] Roller sleeves are usually used in various industrial machinery as the outer layer of key components such as drums and bushings to protect the internal structure and improve transmission efficiency. With the continuous development of the manufacturing industry, the demand for high-performance roller sleeves is increasing day by day. In the current market, the technical level of roller sleeves is constantly improving, including the use of more wear-resistant and corrosion-resistant materials, as well as advanced surface treatment technologies to improve service life and reliability.

[0003] In the actual use process of the roller sleeve, different requirements exist in different positions. In actual application, the key parts have been changed to a detachable form, such as Figures 1-3 As shown, it is a conventional combined vertical mill roller sleeve, including a roller body base 101, outer roller sleeve segments 102 (which can also be called detachable outer roller sleeves), and pressure ring segments 103; a first wear-resistant layer 105 is surfacing-welded on the outer surface of the rear section of the roller body base 101, and a second wear-resistant layer 104 is surfacing-welded on the outer surface of the outer roller sleeve segments 102; a plurality of outer roller sleeve segments 102 are all key-connected to the outer surface of the front section of the roller body base 101, so that a circular outer roller sleeve is formed after the plurality of outer roller sleeve segments 102 are spliced. A plurality of pressure ring segments 103 are wedge-spliced with the circular outer roller sleeve, and the pressure ring segments 103 are connected to the roller body base 101 through fasteners, so that the outer roller sleeve segments 102 are clamped on the roller body base 101. At present, the second wear-resistant layer 104 on the surface of the outer roller sleeve segments 102 adopts a surfacing wear-resistant layer or a ceramic casting. The common forming methods are respectively surfacing a wear-resistant layer on the surface of the outer roller sleeve segments 102 or using ceramic casting on the surface of the outer roller sleeve segments 102 to form the second wear-resistant layer 104. However, the disadvantages of surfacing a wear-resistant layer are: long surfacing time, and the stress generated causes great damage to the cast outer roller sleeve segments 102; the disadvantages of casting ceramics are: the surface density of the ceramic casting formed by the casting method is small, and it is easy to crack after long-term use. If there is cracking or other damage, the whole needs to be recast, and the factory shutdown time is long.

[0004] In summary, a device that can fix a wear-resistant layer on the outer surface of a detachable outer roller sleeve is needed to overcome the above-mentioned disadvantages. Summary of the Invention

[0005] The technical problem to be solved by the present utility model is to provide an induction brazing device for welding a wear-resistant layer on a detachable outer roller sleeve in view of the above-mentioned prior art. The induction brazing device for welding a wear-resistant layer on a detachable outer roller sleeve can weld a wear-resistant structure to the outer surface of the detachable outer roller sleeve by induction brazing, with a short welding time, while reducing the stress influence, reducing the damage to the detachable outer roller sleeve itself, and increasing the service life of the detachable outer roller sleeve.

[0006] To achieve the above technical objectives, the technical solution adopted by the present utility model is as follows:

[0007] An induction brazing device for welding a wear-resistant layer on a detachable outer roller sleeve, including an induction brazing tooling for welding and fixing the detachable outer roller sleeve and the wear-resistant structure;

[0008] The induction brazing tooling includes an upper die, a lower die, a lifting mechanism, and an induction brazing heating mechanism;

[0009] A lower groove for placing the detachable outer roller sleeve is provided on the lower die. The detachable outer roller sleeve is tightly plugged in the lower groove through a plug plate. A wear-resistant structure is placed on the upper surface of the detachable outer roller sleeve, and a solder is filled between the wear-resistant structure and the detachable outer roller sleeve;

[0010] The telescopic end of the lifting mechanism is fixedly connected to the upper die. A pressing plate for pressing the wear-resistant structure on the upper surface of the detachable outer roller sleeve is fixedly connected to the lower surface of the upper die. The lower surface of the upper die is connected to the heating wire in the induction brazing heating mechanism. When the pressing plate of the upper die presses on the wear-resistant structure in the lower die, there is a gap between the heating wire and the wear-resistant structure.

[0011] As a further improved technical solution of the present utility model, the wear-resistant structure is a cermet, and there are multiple cermets arranged closely on the upper surface of the detachable outer roller sleeve.

[0012] As a further improved technical solution of the present utility model, 2 arc-shaped pressing plates are fixedly connected to the lower surface of the upper die. The arc-shaped pressing plates are used to fit and press all the wear-resistant structures on the upper surface of the detachable outer roller sleeve, and the heating wire is located between the 2 arc-shaped pressing plates.

[0013] As a further improved technical solution of the present utility model, the upper die is of an inverted U-shaped structure, and 2 arc-shaped pressing plates are fixedly connected to the lower surface of the inverted U-shaped structure. The lower die is of a positive U-shaped structure, and a lower groove is provided at the inner bottom of the positive U-shaped structure. When the arc-shaped pressing plates of the upper die press and fit on the upper surfaces of all the wear-resistant structures in the lower die, the two sides of the inverted U-shaped structure are in contact with the two sides of the positive U-shaped structure.

[0014] As a further improved technical solution of the present utility model, the lifting mechanism is arranged on the workbench, the workbench is connected to the lifting mechanism through a support frame, and the telescopic end of the lifting mechanism is fixedly connected to the upper surface of the upper mold.

[0015] As a further improved technical solution of the present utility model, the induction brazing heating mechanism includes a high-frequency power supply, a transformer and a heating wire, and the high-frequency power supply is connected to the heating wire through the transformer; the high-frequency power supply and the transformer are arranged on the workbench or on one side of the workbench, and the high-frequency power supply is used to provide high-frequency alternating current for the heating wire.

[0016] As a further improved technical solution of the present utility model, a temperature measuring component for measuring the welding temperature is connected to the support frame, and the temperature measuring component includes an infrared thermometer, and one end of the infrared thermometer is connected to a temperature measuring head.

[0017] As a further improved technical solution of the present utility model, a conveying device is arranged on the workbench, and the conveying device is used to convey the upper mold after installing the detachable outer roller sleeve, wear-resistant structure, solder and plug plate to directly below the upper mold.

[0018] The beneficial effects of the present utility model are as follows:

[0019] The cermet of the present utility model is a metal matrix ceramic composite material that combines the advantages of metals and ceramics, and is welded to the detachable outer roller sleeve by induction brazing using this device. Compared with surfacing, the welding time is short, the hardness is increased, and the stress influence is reduced. Compared with ceramic castings, the density of the wear-resistant surface is increased, it is more wear-resistant and has a longer service life. Compared with surfacing and casting, the damage to the roller sleeve itself is reduced, and the service life of the roller sleeve itself is increased. Description of the Drawings

[0020] Figure 1 is a structural schematic diagram of an existing combined vertical mill roller sleeve.

[0021] Figure 2 is Figure 1 the sectional view in

[0022] Figure 3 is Figure 2 the partial enlarged view of A in

[0023] Figure 4 is a structural schematic diagram of the detachable outer roller sleeve in this embodiment.

[0024] Figure 5 is a structural schematic diagram of multiple cermets closely arranged on the upper surface of the detachable outer roller sleeve in this embodiment.

[0025] Figure 6This is a schematic structural diagram of the upper die, the detachable outer roller sleeve and the plug plate placed on the lower die in this embodiment.

[0026] Figure 7 This is a schematic structural diagram of the upper die and the lower die after being fitted together in this embodiment.

[0027] Figure 8 This is a schematic structural diagram of the induction brazing device in this embodiment. Specific embodiments

[0028] The following further describes the specific embodiments of the present invention with reference to the accompanying drawings:

[0029] An induction brazing device for welding a wear-resistant layer on a detachable outer roller sleeve includes an induction brazing tooling for welding and fixing the detachable outer roller sleeve 1 and the wear-resistant structure. The structure of the detachable outer roller sleeve 1 is as Figures 4-5 shown, that is, Figure 3 the outer roller sleeve block 102 without the second wear-resistant layer 104 installed in

[0030] As Figure 8 shown, the induction brazing tooling includes an upper die 5, a lower die 4, a lifting mechanism 12 and an induction brazing heating mechanism.

[0031] As Figures 6-7 shown, a lower groove for placing the detachable outer roller sleeve 1 is provided on the lower die 4. The detachable outer roller sleeve 1 is tightly plugged in the lower groove by a plurality of plug plates 3. A wear-resistant structure is placed on the upper surface of the detachable outer roller sleeve 1, and a solder is filled between the wear-resistant structure and the detachable outer roller sleeve 1. The solder is a brazing filler metal.

[0032] The wear-resistant structure is a cermet 2, and there are multiple cermets 2. The multiple cermets 2 are arranged closely on the upper surface of the detachable outer roller sleeve 1, as Figures 5-6 shown.

[0033] As Figure 8 shown, the telescopic end of the lifting mechanism is fixedly connected to the upper die 5. Two arc-shaped pressing plates 6 for pressing the cermet on the upper surface of the detachable outer roller sleeve 1 are fixedly connected to the lower surface of the upper die 5. The lower surface of the upper die 5 is connected to the heating wire in the induction brazing heating mechanism. When the two arc-shaped pressing plates 6 of the upper die 5 press on the cermet 2 in the lower die 4, there is a gap between the heating wire and the cermet 2.

[0034] In this embodiment, the arc-shaped pressing plate 6 is used to fit and press all the cermets 2 on the upper surface of the detachable outer roller sleeve 1, and the heating wire is located between the two arc-shaped pressing plates 6.

[0035] In this embodiment, the upper die 5 has an inverted U-shaped structure. Two arc-shaped pressing plates 6 are fixedly connected to the lower surface of the inverted U-shaped structure. The lower die 4 has a regular U-shaped structure, and a lower groove is provided at the inner bottom of the regular U-shaped structure. When the arc-shaped pressing plates 6 of the upper die 5 are tightly pressed against the upper surfaces of all the cermets 2 in the lower die 4, the two sides of the inverted U-shaped structure are in contact with the two sides of the regular U-shaped structure.

[0036] In this embodiment, the lifting mechanism 12 is arranged on the workbench 8. The workbench 8 is connected to the lifting mechanism 12 through the support frame 11. The telescopic end of the lifting mechanism 12 is fixedly connected to the upper surface of the upper die 5. The lifting mechanism 12 can adopt an electric telescopic cylinder or a hydraulic cylinder.

[0037] In this embodiment, the induction brazing heating mechanism includes a high-frequency power supply 15, a transformer, and a heating wire. The high-frequency power supply 15 is connected to the heating wire through the transformer; the high-frequency power supply 15 and the transformer are arranged on the workbench 8 or on one side of the workbench 8. The high-frequency power supply 15 is used to provide high-frequency alternating current for the heating wire.

[0038] In this embodiment, a temperature measuring component (not shown in the figure) for measuring the welding temperature is connected to the support frame 11. The temperature measuring component includes an infrared thermometer, and one end of the infrared thermometer is connected to a temperature measuring head.

[0039] In this embodiment, a conveying device 9 is arranged on the workbench 8. The conveying device 9 is used to convey the upper die 5 to directly below the upper die 5 connected to the telescopic end of the lifting mechanism 12. The conveying device 9 can adopt a conveyor belt device or other existing conveying devices.

[0040] In this embodiment, both the upper die 5 and the lower die 4 are made of 8433 die steel. The detachable outer roller sleeve 1 is made of cast iron.

[0041] The detachable outer roller sleeve 1 in this embodiment is Figure 3 the outer roller sleeve block 102 without the second wear-resistant layer 104 installed. In this embodiment, the second wear-resistant layer 104 is made of cermet 2, and the forming method is to inductively braze the strip-shaped cermet 2 to the surface of the detachable outer roller sleeve 1.

[0042] The operation process of the device in this embodiment is as follows:

[0043] Step 1: Place the detachable outer roller sleeve 1 in the lower groove of the lower die 4 at the installation station 7, and use a plurality of plug plates 3 to plug into the remaining cavities of the lower groove, thereby fixing the detachable outer roller sleeve 1;

[0044] Step 2: The operator applies a soldering flux to the surfaces of the detachable outer roller sleeve 1 and a plurality of cermets 2, arranges the cermets 2 on the upper surface of the detachable outer roller sleeve 1 in sequence, and places a filler metal between the cermets 2 and the detachable outer roller sleeve 1;

[0045] Step 3: Use the upper die 5 to press the lower die 4 for trial fitting to determine whether the cermet 2 can be compacted. That is, when the two sides of the inverted U-shaped structure are in contact with the two sides of the positive U-shaped structure, whether the two arc-shaped pressing plates 6 can be in contact with all the cermets 2. Then, adjust the position of the detachable outer roller sleeve 1 according to the actual situation to ensure that when the two sides of the inverted U-shaped structure are in contact with the two sides of the positive U-shaped structure, the two arc-shaped pressing plates 6 can be in contact with all the cermets 2. Remove the upper die 5.

[0046] Step 4: Place the adjusted lower die 4 and the detachable outer roller sleeve 1 on the first station 10. The equipment runs, and the conveying device 9 moves the lower die 4 on the first station 10 to the welding station. The lifting mechanism 12 at the welding station drives the upper die 5 to move downward and fit with the lower die 4, that is, the two sides of the inverted U-shaped structure are in contact with the two sides of the positive U-shaped structure, and the device starts welding. Electric power is provided by the high-frequency power supply 15 and transformed by the transformer, and the transformed high-frequency alternating current is transmitted to the heating wire to generate an alternating magnetic field, so that eddy currents are generated in the detachable outer roller sleeve 1 and the cermet 2 therein. Due to the action of resistance, heat is generated, and this heat melts the solder with a low melting point to achieve the welding of the detachable outer roller sleeve 1 and the cermet 2, avoiding flame heating. At the same time, electric heating welding is uniform, making the welding quality of the product unified. During welding, the infrared temperature detector detects the welding temperature in real time and feeds it back to the control box 14, and the control box 14 controls the operation and shutdown of the high-frequency power supply 15 to avoid welding the material through due to too high welding temperature and causing material loss.

[0047] Step 5: During the brazing process, the operator repeats steps 1 - 3 for the other detachable outer roller sleeves 1 and the upper die 5. After step 4, that is, when the brazing is completed, the lifting mechanism 12 drives the upper die 5 to move upward and separate from the lower die 4. The conveying device 9 then transfers the lower die 4 on the welding station to the transfer station 13, and at the same time moves the upper die 5 at the first station 10 to the welding station. The operator hoists the lower die 4 at the transfer station 13 to the finished product area, removes the detachable outer roller sleeve 1 welded with the cermet 2 in the lower die 4, and continues to hoist the lower die 4 to the installation station 7. The detachable outer roller sleeve 1 welded with the cermet 2 can be in the same way Figure 5 shown structure.

[0048] The protection scope of the present utility model includes but is not limited to the above embodiments. The protection scope of the present utility model is subject to the claims, and any replacement, deformation, and improvement that are easily conceivable by those skilled in the art for this technology fall within the protection scope of the present utility model.

Claims

1. An induction brazing device for welding a wear-resistant layer on a removable outer roller sleeve, characterized in that: It includes an induction brazing tool for welding and fixing the removable outer roller sleeve to the wear-resistant structure; The induction brazing tooling comprises an upper die, a lower die, a lifting mechanism and an induction brazing heating mechanism; The lower mold is provided with a lower groove, the removable outer roller sleeve is plugged into the lower groove through a plug plate, a wear-resistant structure is placed on the upper surface of the removable outer roller sleeve, and solder is filled between the wear-resistant structure and the removable outer roller sleeve; The telescopic end of the lifting mechanism is connected to the upper mold, and the upper mold is connected to a pressure plate for pressing the wear-resistant structure on the upper surface of the removable outer roller sleeve. The upper mold is connected to the heating wire in the induction brazing heating mechanism. When the pressure plate of the upper mold is pressed on the wear-resistant structure in the lower mold, there is a gap between the heating wire and the wear-resistant structure.

2. The induction brazing device for welding a wear-resistant layer on a removable outer roller sleeve according to claim 1, characterized in that: The wear-resistant structure is a metal ceramic, and there are multiple metal ceramics, which are closely arranged on the upper surface of the detachable outer roller sleeve.

3. The induction brazing device for welding the wear-resistant layer on the removable outer roller sleeve according to claim 1, characterized in that: The lower surface of the upper die is fixedly connected with two arc-shaped pressing plates, which are used to fit and press tightly with all the wear-resistant structures on the upper surface of the removable outer roller sleeve, and the heating wire is located between the two arc-shaped pressing plates.

4. The induction brazing device for welding a wear-resistant layer on a removable outer roller sleeve according to claim 3, characterized in that: The upper mold is an inverted U-shaped structure, and two arc-shaped pressure plates are fixedly connected to the lower surface of the inverted U-shaped structure. The lower mold is a positive U-shaped structure, and a lower groove is provided at the inner bottom of the positive U-shaped structure. When the arc-shaped pressure plate of the upper mold is pressed tightly against the upper surface of all the wear-resistant structures in the lower mold, the two sides of the inverted U-shaped structure are in contact with the two sides of the positive U-shaped structure.

5. The induction brazing device for welding a wear-resistant layer on a removable outer roller sleeve according to claim 1, characterized in that: The lifting mechanism is arranged on a workbench, the workbench is connected to the lifting mechanism through a support frame, and the telescopic end of the lifting mechanism is fixedly connected to the upper surface of the upper mold.

6. The induction brazing device for welding the wear-resistant layer on the removable outer roller sleeve according to claim 5, characterized in that: The induction brazing heating mechanism includes a high-frequency power supply, a transformer and a heating wire, wherein the high-frequency power supply is connected to the heating wire through the transformer; the high-frequency power supply and the transformer are arranged on a workbench or on one side of the workbench, and the high-frequency power supply is used to provide high-frequency alternating current to the heating wire.

7. The induction brazing device for welding the wear-resistant layer on the removable outer roller sleeve according to claim 5, characterized in that: The support frame is connected with a temperature measuring component for measuring the welding temperature. The temperature measuring component comprises an infrared temperature measuring device, and one end of the infrared temperature measuring device is connected with a temperature measuring head.

8. The induction brazing device for welding the wear-resistant layer on the removable outer roller sleeve according to claim 5, characterized in that: The workbench is provided with a conveying device, which is used to convey the upper mold after the detachable outer roller sleeve, the wear-resistant structure, the solder and the plug plate are installed to the bottom of the upper mold.

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