Automatic hard alloy cutter brazing equipment and welding method thereof

Abstract

The invention discloses an automatic hard alloy cutter brazing device which comprises a wire feeding mechanism, a heating mechanism and a clamping mechanism, the heating mechanism comprises a heating induction coil, an induction coil is arranged in the heating induction coil, the clamping mechanism comprises a driving unit and a clamping plate, and the clamping plate is connected with the movable end of the driving unit. The clamping plate is used for clamping a peripheral alloy cutter in the heating induction coil, the driving unit is used for driving the peripheral alloy cutter on the clamping plate to move to the wire feeding mechanism, and the wire feeding mechanism is used for conveying welding wires to the heated peripheral alloy cutter. The alloy welding seam on the peripheral alloy cutter can be automatically welded, and the welding efficiency of the peripheral alloy cutter is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tool welding, and in particular to an automatic brazing device for cemented carbide tools. Background Art

[0002] Peripheral alloy cutter is a peripheral wear-resistant tool material used in shield machine excavation to ensure the excavation aperture, and is mainly welded to the peripheral position of the shield cutter head. In order to ensure its good welding performance with the shield cutter head, the matrix adopts Q355B material, which is a carbon alloy steel (c<0.2%) with good comprehensive performance. The material has good mechanical properties, good weldability, cold and hot processing performance and corrosion resistance. It can be used to manufacture high-load welded structural parts such as ships, boilers, pressure vessels, oil storage tanks, bridges, power station equipment, lifting and transportation machinery. In order to ensure its good wear resistance, the method of surfacing wear-resistant layer and brazing wear-resistant alloy is adopted. This method ensures the wear resistance of the peripheral alloy cutter and greatly improves the service life of the peripheral alloy cutter. It can be seen from the wear mechanism and failure form of the peripheral alloy cutter that the performance of cemented carbide has a very large impact on the life of the tool, so the selection of cemented carbide with suitable performance is of great significance to the production of tools. There are many cemented carbide grades. If the selection is not appropriate, it may cause the tool to fail during use. For example, if a high-wear-resistant, low-toughness cemented carbide is selected in a high-impact formation, the cemented carbide is very likely to crack. Generally speaking, the coarser the WC grains in the cemented carbide and the higher the Co content, the better the toughness and fatigue resistance of the tool, and the higher the impact resistance. However, if the Co content is too high, the hardness and wear resistance of the alloy will decrease. Therefore, the corresponding grade of alloy should be selected according to the actual construction geological conditions. In the prior art, the surfacing welding of the peripheral alloy knife is mainly carried out by manual surfacing welding with welding rods. This method has high requirements for skilled workers and has high labor costs in large-scale welding. In the prior art, the brazing of the peripheral alloy knife is mainly carried out by induction heating the entire alloy knife as a whole. After the entire peripheral alloy knife is fully heated to the temperature, the brazing material is filled to complete the brazing operation of the entire peripheral alloy knife. Since the temperature of the entire peripheral alloy knife is very high after heating, it is dangerous. At the same time, manually adding brazing material to multiple welding points at the same time is prone to omissions, resulting in unstable welding quality. At the same time, the welding process is highly dangerous. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and aims to provide an automated brazing device for cemented carbide knives, which can realize automatic welding of alloy welds on peripheral alloy knives and improve the welding efficiency of peripheral alloy knives.

[0004] The present invention is achieved through the following technical solutions:

[0005] A kind of automatic brazing equipment for cemented carbide knives, comprising a wire feeding mechanism, a heating mechanism and a clamping mechanism, wherein the heating mechanism comprises a heating induction coil, wherein an induction coil is arranged inside the heating induction coil, and the heating induction coil is used to heat the peripheral alloy knife, and the clamping mechanism comprises a driving unit and a clamping plate, wherein the clamping plate is connected to the movable end of the driving unit, and the clamping plate is used to clamp the peripheral alloy knife in the heating induction coil, and the driving unit is used to drive the peripheral alloy knife on the clamping plate to move to the wire feeding mechanism, and the wire feeding mechanism is used to transport welding wire into the weld of the heated peripheral alloy knife.

[0006] Furthermore, the wire feeding mechanism comprises a mounting frame and a robot arm, and the robot arm is fixed on the mounting frame;

[0007] The robot arm is provided with a mounting plate, both ends of the mounting plate are provided with connecting pieces, the connecting pieces are hinged to the mounting plate, and the connecting pieces are provided with wire feeding tubes;

[0008] The robot arm is also provided with a third motor, an output end of the third motor is provided with a winding disk, welding wire is wound on the winding disk, and the welding wire passes through the wire feeding tube.

[0009] Furthermore, the heating mechanism includes a support platform, a mounting platform, and a medium frequency induction heating box. A first lifting unit is provided at the bottom of the support platform, and an output end of the first lifting unit passes through the support platform and is connected to the bottom of the mounting platform.

[0010] The bottom of the mounting platform is also provided with a plurality of first vertical rods, and the first vertical rods vertically penetrate the top of the supporting platform;

[0011] The medium frequency induction heating box is fixed on the mounting platform, and the heating induction coil is located on the side wall of the medium frequency induction heating box.

[0012] Furthermore, it also includes a bottom plate, the driving unit includes a first motor and a second motor, and there are two clamping plates;

[0013] The first motor and the second motor are both fixed to the bottom plate, the output end of the first motor is provided with a first screw rod, the first screw rod is provided with a first movable block, the first movable block is provided with a first clamping frame, and one of the clamping plates is located on the first clamping frame;

[0014] The output end of the second motor is provided with a second screw rod, the second screw rod is provided with a second movable block, the second movable block is provided with a second clamping frame, and the other clamping plate is fixed on the second clamping frame.

[0015] Furthermore, two first slides are provided on the bottom plate, a plurality of first sliders and second sliders are provided on the first slide, the first clamping frame is connected to the first slider, and the second clamping frame is connected to the second slider.

[0016] Furthermore, the first clamping frame includes a first mounting plate, a cylinder and a second mounting plate, the cylinder is fixed on both sides of the first mounting plate, and a connecting piece is provided at the output end of the cylinder;

[0017] A second slide is also provided on the top of the first mounting plate, a third slide block connected to the connecting member is provided on the second slide block, and the bottom of the second mounting plate is connected to the third slide block;

[0018] The clamping plate is fixed on the second mounting plate.

[0019] Furthermore, the first clamping frame further comprises a third mounting plate, the first movable block and the first sliding block are both connected to the third mounting plate, a second lifting unit and a plurality of supporting columns are further provided on the top of the third mounting plate, a second vertical rod is provided inside the supporting column, the top of the second vertical rod is connected to the bottom of the first mounting plate, a fourth mounting plate is further provided between the third mounting plate and the first mounting plate, and the fourth mounting plate is sleeved on the second vertical rod;

[0020] The output end of the second lifting unit passes through the fourth mounting plate and is connected to the bottom of the first mounting plate.

[0021] Furthermore, a groove is provided on one side of the fourth mounting plate, a third motor is provided in the groove, a rotating plate is provided at the output end of the third motor, a connecting block is provided on the rotating plate, a notch is provided on the connecting block, a fixing rod is provided on the inner wall of the notch, the fixing rod is connected to the connecting block through a thread, and a limiting section is provided on the fixing rod.

[0022] Furthermore, a clamping groove is provided on one side of the clamping plate;

[0023] A channel is arranged inside the clamping plate, and a water inlet and a water outlet are also arranged on the clamping plate, and both the water inlet and the water outlet are communicated with the channel.

[0024] An automatic brazing method for cemented carbide knives comprises the following steps:

[0025] 1) Place the peripheral alloy knife to be welded on the clamping plate, and make the peripheral alloy knife pass through the heating induction coil, adjust the driving unit, and fix the peripheral alloy knife on the clamping plate;

[0026] 2) using the driving unit to adjust the position of the peripheral alloy knife so that one of the alloys of the peripheral alloy knife is in the heating induction coil, and using the heating mechanism to heat the peripheral alloy knife;

[0027] 3) When the temperature of the peripheral alloy knife is heated to the required temperature for the solder to melt, continue to heat the peripheral alloy knife stably for 30 seconds, and use the drive unit to move the heated peripheral alloy knife to the wire feeding mechanism;

[0028] 4) Using the robot arm to drive the wire feeding tube to move to the welds on both sides of the alloy to be welded by the peripheral alloy cutter, and then using the third motor to fill the weld with welding wire, while using the robot arm to move the welding wire along the welds on both sides of the alloy to complete the welding of the entire welds on both sides of the alloy on the peripheral alloy cutter;

[0029] 5) Use the driving unit to adjust the position of the peripheral alloy knife so that another alloy on the peripheral alloy knife is in the heating induction coil, and use the heating mechanism to continue heating the peripheral alloy knife:

[0030] 6) Repeat steps 3) to 5) to continue welding the weld of the remaining alloy of the peripheral alloy knife;

[0031] 7) After completing the welding of the peripheral alloy knife, the peripheral alloy knife is sent to the insulation furnace for insulation treatment to complete the entire brazing operation.

[0032] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0033] The present invention utilizes a clamping plate provided on a driving unit to fix the peripheral alloy knife to be welded, and ensures that the peripheral alloy knife is in a heating induction coil, utilizes a medium frequency induction heating box to heat the peripheral alloy knife to the melting temperature of the brazing material, and then continues to utilize the driving unit to move the heated peripheral alloy knife to a wire feeding mechanism, utilizes a robot arm to move the welding wire in a wire feeding tube to the welds on both sides of the alloy of the peripheral alloy knife, and utilizes a robot and a third motor to realize welding of the entire weld of the peripheral alloy knife, and after completing welding of the welds on both sides of one alloy of the peripheral alloy knife, continues to heat the peripheral alloy knife by utilizing a heating induction coil, and repeats the above steps to continue welding the welds on both sides of the remaining alloy of the peripheral alloy knife. Compared with the manual welding method used in the prior art, the present brazing equipment not only ensures the welding quality of the peripheral alloy knife, but also saves manual labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0035] Figure 1 It is a schematic diagram of the structure of the peripheral alloy knife of the present invention;

[0036] Figure 2 It is a schematic diagram of the structure of the present invention;

[0037] Figure 3 It is a structural schematic diagram of the wire feeding mechanism of the present invention;

[0038] Figure 4 It is a structural schematic diagram of the heating mechanism of the present invention;

[0039] Figure 5 It is a structural schematic diagram of the bottom plate of the present invention;

[0040] Figure 6 It is a structural schematic diagram of the first clamping frame of the present invention;

[0041] Figure 7 It is a structural schematic diagram of the first clamping frame of the present invention from another perspective;

[0042] Figure 8 This is a schematic diagram of the structure of the connection block of the present invention equipped with an edge scraper;

[0043] Fig. 9 It is a structural schematic diagram of the connection block of the present invention;

[0044] Fig.10 A schematic diagram of the structure of a heating induction coil in another embodiment of the present invention

[0045] Fig.11 It is a structural schematic diagram of the clamping plate of the present invention;

[0046] Fig.12 This is a schematic diagram of the internal structure of the clamping plate of the present invention;

[0047] Fig.13 For the present invention Fig.11 The structural diagram of the enlarged part A in the middle;

[0048] Fig.14 is a schematic structural diagram of the second connector of the present invention;

[0049] Fig.15 It is a structural schematic diagram of the rotating shaft of the present invention;

[0050] Fig.16 It is a structural schematic diagram of the sleeve of the present invention;

[0051] Fig.17 It is a structural schematic diagram of the cross bar of the present invention.

[0052] Marks and corresponding parts names in the attached drawings:

[0053] 1. Bottom plate; 2. First clamping frame; 4. Second clamping frame; 5. Wire feeding mechanism; 6. Heating mechanism; 8. Material receiving frame; 10. Robot arm; 11. Mounting plate; 12. Wire feeding tube; 13. Support platform; 14. Mounting platform; 15. First vertical rod; 16. Medium frequency induction heating box; 17. Heating induction coil; 18. Connector; 19. First motor; 20. First slide; 21. First slider; 22. First lead screw; 23. First movable block; 24. Second lead screw; 25. Second movable block; 26. Second motor; 27. Second slider; 28. Third mounting plate; 29. ​​Cylinder; 31. Peripheral alloy knife; 32. Clamping plate; 33. Fourth mounting plate; 34. Second slide; 35. First mounting plate; 36. Second mounting plate; 37. The third motor; 38. The edge scraper; 39. The second lifting unit; 40. The support column; 42. The connecting block; 43. The clamping groove; 44. The water inlet; 45. The water outlet; 46. The alloy; 47. The base; 49. The channel; 50. The cross bar; 51. The second connector; 53. The rotating shaft; 54. The first elastic member; 55. The limiting block; 56. The first connector; 57. The limiting ball; 58. The connecting pipe; 59. The second elastic member; 60. The movable plate; 61. The movable cylinder; 62. The limiting platform; 63. The fourth through hole; 64. The third through hole; 66. The notch; 67. The limiting section; 69. The heat conducting block; 70. The arc-shaped protrusion; 72. The movable shaft; 73. The cavity; 74. The sleeve; 75. The impeller; 76. The sixth through hole; 77. The seventh through hole. DETAILED DESCRIPTION

[0054] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0055] like Figures 2 to 11 As shown, the present invention includes a wire feeding mechanism 5, a heating mechanism 6 and a clamping mechanism, the heating mechanism 6 includes a heating induction coil 17, the heating induction coil 17 is used to heat the peripheral alloy knife 31, the clamping mechanism includes a driving unit and a clamping plate 32, the clamping plate 32 is connected to the movable end of the driving unit, the clamping plate 32 is used to clamp the peripheral alloy knife 31 in the heating induction coil 17, the driving unit is used to drive the peripheral alloy knife 31 on the clamping plate 32 to move to the wire feeding mechanism 5, the wire feeding mechanism 5 is used to transport the welding wire into the weld of the heated peripheral alloy knife 31.

[0056] like Figure 1As shown, when the peripheral alloy knife is processed and manufactured, it is necessary to weld the gap between the substrate 47 and the alloy 46. The existing method is usually to use workers to perform surfacing welding. This method has high requirements for skilled workers and is also costly in large-scale welding. In addition, since the alloy knife needs to be heated as a whole during welding, the peripheral alloy knife 31 is fully heated to a specified temperature before filling with brazing material. However, since the entire peripheral alloy knife 31 is in a high temperature state after heating, it is dangerous to manually fill the brazing material, and omissions are prone to occur during the filling process, resulting in unstable welding quality of the peripheral alloy knife 31. For this reason, the technical solution is designed to be used for brazing equipment for automatic welding of the peripheral alloy knife 31. When in use, the peripheral alloy knife 31 to be welded is first placed on a clamping mechanism, and the clamping mechanism is used to fix the peripheral alloy knife 31, and it is ensured that the peripheral alloy knife 31 to be welded is in the heating induction coil 17 of the heating mechanism 6, and then the heating induction coil 17 is used to heat the peripheral alloy knife 31. After heating to the specified temperature, the peripheral alloy knife 31 is driven by the set driving unit to move a distance toward the wire feeding mechanism 5. After the driving unit drives the peripheral alloy knife 31 to move to the specified position, the wire feeding mechanism 5 is used to deliver the water welding wire to both sides of the alloy 46 of the peripheral alloy knife 31. Since the peripheral alloy knife 31 is in a high temperature state, the welding wire will melt after moving to the gaps on both sides of the alloy 46, thereby realizing automatic surfacing of the peripheral alloy knife 31. After completing the surfacing of one of the alloy 46 gaps on the peripheral alloy knife 31, After that, the driving unit is used again to drive the peripheral alloy knife 31 back into the heating induction coil 17, and the heating induction coil 17 is used to continue to heat another alloy area on the peripheral alloy knife 31. After the peripheral alloy knife 31 is heated to a specified temperature, the peripheral alloy knife 31 is moved to the wire feeding mechanism 5, and the wire feeding mechanism 5 is used to continue to feed the wire to the next alloy 46 on the peripheral alloy knife 31, and the peripheral alloy knife 31 is continued to be surfacing welded. Repeat the above steps to complete the welding of the entire wear-resistant plate of the peripheral alloy knife 31.

[0057] The wire feeding mechanism 5 includes a mounting frame and a robot arm 10, and the robot arm 10 is fixed on the mounting frame; a mounting plate 11 is provided on the robot arm 10, and connecting plates are provided at both ends of the mounting plate 11, and the connecting plates are hinged to the mounting plate 11, and wire feeding tubes 12 are provided on the connecting plates; a third motor is also provided on the robot arm 10, and a winding disk is provided on the output end of the third motor, and welding wire is wound on the winding disk, and the welding wire passes through the wire feeding tube 12.

[0058] In order to realize the automatic filling of welding wire at the welds on both sides of the alloy on the peripheral alloy knife 31 in the present embodiment, a wire feeding mechanism 5 is provided, and the wire feeding mechanism 5 includes a mounting frame and a robot arm 10. The mounting frame is used to fix the robot arm 10 in the processing area. The robot arm 10 is a prior art, which is used to drive the wire feeding tube 12 to move arbitrarily in three-dimensional space, thereby ensuring that the welding wire in the wire feeding tube 12 can be accurately filled in the weld of the peripheral alloy knife 31; at the same time, in order to ensure that the welding wire can continuously fill the weld of the peripheral alloy knife 31, a third motor is also provided in the robot arm 10. In the initial state, one end of the welding wire is wound on the winding disk, and the other end of the welding wire passes through the wire feeding tube 12. In this way, when the peripheral alloy knife 31 is welded, the third motor drives the winding disk to rotate, and the winding disk will drive the welding wire to gradually extend out of the wire feeding tube 12 during rotation, thereby achieving the purpose of continuously filling the welding wire into the weld in the peripheral alloy knife 31.

[0059] At the same time, in order to improve the welding efficiency of the peripheral alloy knife 31, two wire feeding tubes 12 are also arranged on the mounting plate 11. In this way, the two wire feeding tubes 12 can be used to fill the solder at the same time on the welds on both sides of the alloy 46 on the peripheral alloy knife 31, thereby improving the welding efficiency of the peripheral alloy knife 31; the connecting plates on the wire feeding tubes 12 are connected to the mounting plate 11 in a hinged manner, so that the spacing between the two wire feeding tubes 12 can be adjusted arbitrarily to meet the use of alloys of different widths on different peripheral alloy knives 31.

[0060] The heating mechanism 6 includes a support platform 13, a mounting platform 14, and a medium frequency induction heating box 16. A first lifting unit is provided at the bottom of the support platform 13, and an output end of the first lifting unit passes through the support platform 13 and is connected to the bottom of the mounting platform 14; a plurality of first vertical rods 15 are also provided at the bottom of the mounting platform 14, and the first vertical rods 15 vertically pass through the top of the support platform 13; the medium frequency induction heating box 16 is fixed on the mounting platform 14, and the heating induction coil 17 is located on the side wall of the medium frequency induction heating box 16, and the heating induction coil 17 is a rectangular metal frame, and an induction coil is provided in the rectangular metal frame.

[0061] In order to ensure that the peripheral alloy knife 31 can be quickly heated to the welding temperature, the present embodiment is provided with a heating mechanism 6, wherein the medium frequency induction heating box 16 is placed in the processing area by means of the provided support platform 13. At the same time, in order to be able to adjust the height of the heating induction coil 17 to meet different welding requirements, a first lifting unit is also provided on the support platform 13, and the first lifting unit is a cylinder or a hydraulic cylinder.

[0062] The medium frequency induction heating box 16 is a prior art, and the medium frequency induction heating box 16 is used to provide a medium frequency current to the induction coil of the heating induction coil 17, so that the heating induction coil 17 generates a magnetic field, thereby causing the peripheral alloy knife 31 located in the heating induction coil 17 to generate a corresponding induced current, thereby heating the peripheral alloy knife 31 to a specified temperature.

[0063] It also includes a base plate 1, the driving unit includes a first motor 19 and a second motor 26, and there are two clamping plates 32; the first motor 19 and the second motor 26 are both fixed on the base plate 1, the output end of the first motor 19 is provided with a first screw rod 22, the first screw rod 22 is provided with a first movable block 23, the first movable block 23 is provided with a first clamping frame 2, one of the clamping plates 32 is located on the first clamping frame 2; the output end of the second motor 26 is provided with a second screw rod 24, the second screw rod 24 is provided with a second movable block 25, the second movable block 25 is provided with a second clamping frame 4, and the other clamping plate 32 is fixed on the second clamping frame 4.

[0064] In this embodiment, in order to enable the clamped peripheral alloy knife 31 to reciprocate between the heating induction coil 17 and the wire feeding tube 12 of the wire feeding mechanism 5, and to achieve the welding of multiple alloy welds on the peripheral alloy knife 31, a first motor 19 and a second motor 26 are arranged on the base plate 1. The first motor 19 and the second motor 26 are respectively located at the two ends of the base plate 1. When the first motor 19 is working, it will drive the first screw rod 22 to rotate, thereby driving the first movable block 23 on the first screw rod 22 to move axially along the first screw rod 22, thereby achieving the adjustment of the horizontal position of the first clamping frame 2; similarly, the second motor 26 can be used to adjust the horizontal position of the second clamping frame 4. In this way, by controlling the working state of the first motor 19 and the second motor 26, not only the peripheral alloy knife 31 on the clamping plate 32 can be fixed, but also the reciprocating movement of the peripheral alloy knife 31 between the heating induction coil 17 and the wire feeding mechanism 5 can be achieved.

[0065] Specifically, one end of the peripheral alloy knife 31 to be welded is placed on one of the clamping plates 32, and then the first motor 19 or the second motor 26 is controlled to work, so that the other clamping plate 32 moves toward the other end of the peripheral alloy knife 31, and finally the peripheral alloy knife 31 is clamped between the two clamping plates 32; then the peripheral alloy knife 31 is heated by the heating induction coil 17, and after the peripheral alloy knife is heated to a specified temperature, the first motor 19 and the second motor 26 are started at the same time, so that the first clamping frame 2 and the second clamping frame 4 move toward the wire feeding tube 12 of the wire feeding mechanism 5 at the same time, After the weld on the peripheral alloy knife 31 moves to the specified position, the wire feeding tube 12 on the wire feeding mechanism 5 is used to fill the brazing material into the weld on the peripheral alloy knife 31. After the weld on both sides of one of the alloys of the peripheral alloy knife 31 is completed, the first motor 19 and the second motor 26 work simultaneously again, driving the first clamping frame 2 and the second clamping frame 4 to retreat toward the direction of the heating induction coil 17 at the same time, and continue to use the heating induction coil 17 to heat the peripheral alloy knife 31. After the peripheral alloy knife 31 is heated, the above steps are repeated to continue welding the remaining welds on the peripheral alloy knife 31.

[0066] The bottom plate 1 is also provided with two first slides 20 , on which a plurality of first sliders 21 and second sliders 27 are provided. The first clamping frame 2 is connected to the first sliders 21 , and the second clamping frame 4 is connected to the second sliders 27 .

[0067] In this embodiment, a first slide 20 is further provided on the bottom plate 1 , and the first slider 21 and the second slider 27 are slidably connected to the first slide 20 , thereby ensuring the stability of the first clamping frame 2 and the second clamping frame 4 during the movement.

[0068] The first clamping frame 2 includes a first mounting plate 35, a cylinder 29 and a second mounting plate 36. The cylinder 29 is fixed on both sides of the first mounting plate 35, and a connecting piece 18 is provided at the output end of the cylinder 29; a second slide 34 is also provided on the top of the first mounting plate 35, and a third slider connected to the connecting piece 18 is provided on the second slide 34, and the bottom of the second mounting plate 36 is connected to the third slider; the clamping plate 32 is fixed on the second mounting plate 36.

[0069] Since the first clamping frame 2 and the second clamping frame 4 are distributed on both sides of the heating induction coil 17, in order to prevent the heating induction coil 17 from causing certain obstructions to the movement of the first clamping frame 2 and the second clamping frame 4 when the peripheral alloy knife 31 to be welded is short, a first mounting plate 35 and a second mounting plate 36 are also provided, and a second slide 34 and a third slider are provided between the first mounting plate 35 and the second mounting plate 36, and the clamping plate 32 is fixed to the top of the second mounting plate 36 by bolts. In this way, when the length of the peripheral alloy knife 31 is short and causes the heating induction coil 17 to obstruct the first clamping frame 2 and the second clamping frame 4, the provided cylinder 29 is used to drive the connecting member 18 to move. When the connecting member 18 moves, it will drive the third slider located on the second slide 34 to move synchronously, and finally the second mounting plate 36 extends from one end of the first mounting plate 35, thereby ensuring that the clamping plates 32 on the first clamping frame 2 and the second clamping frame 4 can effectively clamp the peripheral alloy knives 31 of different lengths.

[0070] The second clamping frame 4 is a rectangular box structure, and the clamping plate 32 is fixed on the top of the rectangular box. In order to realize the welding of multiple peripheral alloy knives 31 and improve the welding efficiency of the peripheral alloy knives 31, the first clamping frame 2 and the second clamping frame 4 are provided with multiple clamping plates 32, so that the clamping plates 32 can clamp multiple peripheral alloy knives 31 at the same time. In this way, the heating induction coil 17 can be used to heat the multiple peripheral alloy knives 31 at the same time. After the multiple peripheral alloy knives 31 are heated, the wire feeding mechanism 5 can be used to perform buildup welding on the welds of the multiple peripheral alloy knives 31 one by one, thereby improving the welding efficiency of the peripheral alloy knives 31.

[0071] The first clamping frame 2 also includes a third mounting plate 28, the first movable block 23 and the first sliding block 21 are both connected to the third mounting plate 28, a second lifting unit 39 and a plurality of supporting columns 40 are also provided on the top of the third mounting plate 28, a second vertical rod is provided inside the supporting column 40, the top of the second vertical rod is connected to the bottom of the first mounting plate 35, a fourth mounting plate 33 is also provided between the third mounting plate 28 and the first mounting plate 35, the fourth mounting plate 33 is sleeved on the second vertical rod; the output end of the second lifting unit 39 passes through the fourth mounting plate 33 and is connected to the bottom of the first mounting plate 35.

[0072] A groove is also provided on one side of the fourth mounting plate 33, in which a third motor 37 is provided, and a rotating plate is provided at the output end of the third motor 37, and a connecting block 42 is provided on the rotating plate, and a notch 66 is provided on the connecting block 42. A fixing rod is provided on the inner wall of the notch 66, and the fixing rod is connected to the connecting block 42 by a thread, and a limiting section 67 is provided on the fixing rod.

[0073] In order to meet the welding needs of the edge scraper 38, the present embodiment further provides a third mounting plate 28 and a fourth mounting plate 33. A groove is provided on the side of the fourth mounting plate 33 facing the heating induction coil 17. A third motor 37 is fixed in the groove. The third motor 37 can drive the rotating plate to rotate when working. When the peripheral alloy knife needs to be welded, the third motor 37 is used to drive the connecting block 42 on the rotating plate to be in a downward state, so that the clamping plate 32 can be installed on the second mounting plate 36 to avoid the connecting block 42 from obstructing the clamping plate 32. When the edge scraper 38 needs to be welded, the third motor 37 can be used to drive the connecting block 42 on the rotating plate to be in a downward state. When the edge scraper 38 is welded, the clamping plate 32 on the second mounting plate 36 is first removed, and then the third motor 37 is used to drive the connecting block 42 on the rotating plate to rotate to an upward state, and then the edge scraper 38 to be welded is installed into the notch 66 of the connecting block 42, and the fixing rod is inserted into the first through hole of the edge scraper 38 and connected to the connecting block 42 with a thread, and by rotating the fixing rod, the outer diameter of the limiting section 67 set on the fixing rod is larger than the inner diameter of the first through hole of the edge scraper 38, so that the edge scraper 38 is fixed in the notch 66 of the connecting block 42.

[0074] In order to ensure that the edge scraper 38 fixed in the connecting block 42 can be heated to the welding temperature by the heating induction coil 17, a second lifting unit 39 is also provided. The second lifting unit 39 is a cylinder, which can push the second mounting plate 36 to move upward when working. When the second mounting plate 36 moves upward, it will drive the second vertical rod and the fourth mounting plate 33 to move together, and finally drive the edge scraper 38 on the connecting block 42 to move to a height flush with the heating induction coil 17, and then use the first motor 19 to drive the third mounting plate 28 to move toward the heating induction coil 17, forcing the edge scraper 38 on the connecting block 42 to extend into the heating induction coil 17, and use the heating induction coil 17 to heat the edge scraper 38. After the edge scraper 38 is heated to a specified temperature, the first motor 19 is used to drive the edge scraper 38 to move to the wire feeding mechanism 5, and the wire feeding tube 12 is used to fill the welding wire into the weld on the edge scraper 38, thereby realizing automatic welding of the edge scraper 38.

[0075] In another embodiment, in order to meet the heating requirements of the edge scraper 38, the heating induction coil 17 is placed horizontally, and the heating induction coil 17 is connected to the medium frequency induction heating box 16 by bolts, which is convenient for replacement. In this way, when the edge scraper 38 needs to be heated, the vertical heating induction coil 17 is changed to a horizontal heating induction coil 17. In this way, when the edge scraper 38 is welded, the second lifting unit 39 can drive the edge scraper 38 on the connecting block 42 to extend into the heating induction coil 17, so that the edge scraper 38 is heated by the heating induction coil 17. After the edge scraper 38 is heated to the specified temperature, the robot arm 10 is used to fill the welding wire in the wire feeding tube 12 into the weld on the edge scraper 38, thereby realizing automatic welding of the edge scraper 38.

[0076] In another embodiment, a copper tube is further provided on the outer wall of the heating induction coil 17. In order to prevent the heating induction coil 17 from being damaged due to overheating, a copper tube is also provided on the heating induction coil 17. There is flowing cooling water in the copper tube. In this way, the cooling water can achieve a certain heat dissipation purpose for the heating induction coil 17, thereby improving the service life of the heating induction coil 17.

[0077] A clamping groove 43 is provided on one side of the clamping plate 32 ; a channel 49 is provided inside the clamping plate 32 , and a water inlet 44 and a water outlet 45 are also provided on the clamping plate 32 , and both the water inlet 44 and the water outlet 45 are connected to the channel 49 .

[0078] In this embodiment, in order to ensure that the clamping plate 32 can fix the peripheral alloy knife 31, a clamping groove 43 is provided at the end of the clamping plate 32 facing the heating induction coil 17. When in use, the two ends of the peripheral alloy knife 31 are respectively placed in the clamping groove 43 of the clamping plate 32, and then the first motor 19 or the cylinder 29 is used to drive one of the clamping plates 32 to move, so that the peripheral alloy knife 31 to be welded is stably fixed between the two clamping plates 32.

[0079] Since the peripheral alloy knife 31 needs to be heated in the heating induction coil 17, in order to prevent the clamping plate 32 from being damaged due to overheating, a channel 49 is also provided in the clamping plate 32. The water inlet and outlet are connected to the external cooling tower through a water pipe. In this way, the cooling water in the cooling tower can enter the channel 49 and take away part of the heat of the clamping plate 32, thereby ensuring that the clamping plate 32 will not be damaged due to overheating.

[0080] like Figure 12-Figure 17As shown, in another embodiment, a mounting groove is provided on the inner wall of the water inlet of the clamping plate 32, and a first elastic member 54 and a limit block 55 are provided in the mounting groove. A first connecting head 56 is provided in the water inlet, and the first connecting head 56 is connected to an external cooling tower through a water pipe. A limit hole is provided on the side wall of the first connecting head 56, and the limit hole is communicated with the inside of the first connecting head 56. In this way, when the first connecting head 56 is inserted into the water inlet, and the limit hole and the limit block 55 are in the same radial direction, the limit block 55 is inserted into the limit hole under the action of the first elastic member 54, thereby realizing a quick connection between the first connecting head 56 and the water inlet, and the inner diameter of the limit hole is consistent with the outer diameter of the limit block 55.

[0081] The clamping plate 32 is also provided with a second cavity, which is distributed along the axial direction of the water outlet and is connected to the water outlet. The water outlet of the clamping plate 32 is also provided with a second connector 51, which is connected to the cooling tower through a water pipe; the second connector 51 is provided with a third through hole 64 and a fourth through hole 63 in sequence along the direction of the second connector 51 connecting with the water pipe; the first connector 56 is also provided with a connecting pipe 58, and the end of the connecting pipe 58 away from the first connector 56 is a closed structure, and a sliding groove is provided on the inner wall of the first connector 56, and a limiting ball 57 located in the sliding groove is provided on the side wall of the connecting pipe 58; A second through hole is provided on the side wall of the connecting pipe 58; a first cavity is also provided inside the clamping plate 32, the first cavity is located between the channel 49 and the water inlet, a second elastic member 59 is provided in the first cavity, a movable plate 60 is provided on the second elastic member 59, a cross bar 50 and a fifth through hole are provided on the movable plate 60, the fifth through hole connects the first cavity with the channel 49, the cross bar 50 is distributed along the direction of the channel 49 and can be inserted into the third through hole 64 to fix the second connecting head 51 in the water outlet.

[0082] Since the clamping plate 32 is provided with a water inlet and a water outlet, the existing method is usually to use a threaded method to detachably connect the connector connected to the cooling tower to the water inlet and the water outlet. However, the threaded connection for a long time is prone to wear of the threads, and the clamping plate 32 is in a high temperature state during use. Although a cooling water passage 49 is provided inside the clamping plate 32 for dissipating heat to the clamping plate 32, it is impossible to completely avoid the clamping plate 32 being in a normal temperature state, which causes more serious wear of the threads at the water inlet and the water outlet. For this reason, this embodiment cancels the conventional threaded connection method. During installation, first insert the second connector 51 into the water outlet, then insert the first connector 56 into the water inlet, use the limit block 55 to fix the first connector 56 at the water inlet, and then use the cooling tower to transport cooling water with a certain pressure into the first connector 56. After the cooling water enters the first connector 56, the water pressure acts on the closed end of the connecting pipe 58, forcing the connecting pipe 58 to extend from the first connecting pipe 56. The connecting pipe 58 will push the movable plate 60 to move during the extension process, thereby inserting the cross bar 50 into the third through hole 64, thereby achieving the purpose of fixing the second connector 51 in the water outlet.

[0083] The cooling water in the connecting pipe 58 passes through the second through hole, the fifth through hole, and the fourth through hole 63 in sequence and is finally discharged from the second connecting head 51, thereby achieving the purpose of heat exchange with the clamping plate 32 and achieving the purpose of heat exchange and heat dissipation.

[0084] The second connector 51 is also provided with a movable cylinder 61 and a stopper 62, both of which are sleeved on the second connector 51, and the movable cylinder 61 is consistent with the inner diameter of the water outlet, and the movable cylinder 61 can move axially along the second connector 51 on the second connector 51 to block the fourth through hole 63. In this way, when the first connector 56 and the second connector 51 need to be removed, the movable cylinder 61 is moved upward so that the movable cylinder 61 blocks the fourth through hole 63, and the channel 49 is connected to the second connector. 51 is disconnected. In this way, when the cooling tower continues to deliver cooling water with a certain pressure to the channel 49, the water pressure of the cooling water will act on the end of the limit block 55, forcing the limit block to move out of the limit hole, thereby realizing rapid unlocking of the limit block 55, so that the first connecting head 56 can be removed from the water inlet of the clamping plate 32. After the first connecting head 56 is removed, the movable plate 60 will be pulled backward under the action of the second elastic member 59, thereby moving the cross bar 50 out of the third through hole 64 in turn, so as to remove the second connecting head 51.

[0085] In another embodiment, in order to improve the heat dissipation of the clamping plate 32, there are two channels 49, and the two channels 49 are symmetrically arranged in the clamping plate 32. A rotating shaft 53 is also arranged in the clamping plate 32, and a cavity 73 is arranged inside the rotating shaft 53. Both ends of the rotating shaft 53 are provided with movable shafts 72, and one of the movable shafts 72 extends into one of the channels 49 of the clamping plate 32. A sleeve 74 is also arranged on the other movable shaft 72. The two ends of the sleeve 74 are closed structures. The movable shaft 72 passes through the two closed ends of the sleeve 74. The sleeve 74 is located in the other channel 49, and the sleeve 74 is radially distributed along the channel 49. A sixth through hole 76 and a seventh through hole 77 are arranged on the sleeve 74, and the sixth through hole 76 and the seventh through hole 77 are symmetrically distributed on the sleeve 74. A plurality of impellers 75 are also arranged in the sleeve 74, and the impellers 75 are connected to the movable shaft 72.

[0086] An opening is further provided on the inner wall of the clamping groove 43 of the clamping plate 32 . A heat conducting block 69 is provided in the opening. One end of the heat conducting block 69 contacts the circumferential side wall of the rotating shaft 53 , and the other end is flush with the inner wall of the clamping groove 43 .

[0087] When cooling water with a certain pressure enters the channel 49, the cooling water in the channel 49 enters into the sleeve 74 through the sixth through hole 76, and the cooling water acts on the impeller 75, forcing the impeller 75 to rotate in the sleeve 74, thereby driving the movable shaft 72 to rotate, and finally driving the rotating shaft 53 to rotate. In this way, when the peripheral alloy knife 31 placed in the clamping groove 43 of the clamping plate 32 is heated, the heat of the peripheral alloy knife 31 is transferred to the heat conductive block 69 during the heating process. Since the cooling water drives the rotating shaft 53 to rotate while flowing in the clamping plate 32, the contact surface between the rotating shaft 53 and the heat conductive block 69 is forced to change continuously, so that the heat transferred to the heat conductive block 69 can be further transferred to different circumferential surfaces of the rotating shaft 53, thereby improving the heat exchange efficiency between the rotating shaft 53 and the heat conductive block 69, thereby improving the cooling force of the clamping plate 32.

[0088] When the heat-conducting block 69 is worn, the heat-conducting block 69 can be removed from the opening and replaced with a new heat-conducting block 69 .

[0089] A third cavity is also provided in the clamping plate 32, and the third cavity is located between the channel 49 and the rotating shaft 53, and a movable shaft 72 with a sleeve 74 on the rotating shaft 53 passes through the third cavity, and the third cavity is also connected to the first cavity; a pipeline connected to the cavity is provided on the movable shaft 72, and a pipeline on one of the movable shafts 72 is connected to one of the channels 49 on the clamping plate 32, and a pipeline on the other movable shaft 72 is connected to the third cavity.

[0090] In order to take away the heat transferred to the rotating shaft 53 in this embodiment, a cavity 73 is provided inside the rotating shaft 53, so that the cooling water entering the first cavity through the first connecting head 56 can enter the third cavity, and then the cooling water enters the cavity 73 of the rotating shaft 53 through the pipeline on the movable shaft 72, thereby achieving the purpose of heat exchange between the cooling water and the rotating shaft 53. The cooling water after the heat exchange enters another channel 49 of the clamping plate 32 through the pipeline on another movable shaft 72, and is finally discharged through the second connecting head 51 on the channel 49, thereby achieving the purpose of heat exchange between the cooling water and the rotating shaft 53.

[0091] A fourth cavity is also provided in the clamping plate 32, and the fourth cavity is located between the third cavity and the channel 49, and one of the movable shafts 72 of the rotating shaft 53 passes through the fourth cavity; an arc-shaped protrusion 70 is provided on the cross bar 50, and the arc-shaped protrusion 70 is located in the fourth cavity, and the arc-shaped protrusion 70 can move in the fourth cavity, and the movable shaft 72 passes through the arc-shaped groove of the arc-shaped protrusion 70.

[0092] Since the cross bar 50 is movable in the clamping plate 32 , in order to avoid mutual interference between the cross bar 50 and the movable shaft 72 on the same plane, an arc-shaped protrusion 70 for passing through the movable shaft 72 is provided on the cross bar 50 , so that the cross bar 50 will not interfere with the movable shaft 72 when moving in the clamping plate 32 .

[0093] A material receiving frame 8 is also provided on one side of the third mounting plate 28, and the material receiving frame 8 can be used to collect welding slag generated during welding.

[0094] An automatic brazing method for cemented carbide knives comprises the following steps:

[0095] 1) placing the peripheral alloy knife 31 to be welded on the clamping plate 32, and passing the peripheral alloy knife 31 through the heating induction coil 17, adjusting the driving unit, and fixing the peripheral alloy knife 31 on the clamping plate 32;

[0096] 2) Using the driving unit to adjust the position of the peripheral alloy knife 31, so that one of the alloys 46 of the peripheral alloy knife 31 is in the heating induction coil 17, and using the heating mechanism 6 to heat the peripheral alloy knife 31;

[0097] 3) When the temperature of the peripheral alloy knife 31 is heated to the required temperature for the solder to melt, the peripheral alloy knife 31 is continuously heated stably for 30 seconds, and the heated peripheral alloy knife 31 is moved to the wire feeding mechanism 5 by the driving unit;

[0098] 4) Using the robot arm 10 to drive the wire feeding tube 12 to move to the welds on both sides of the alloy 46 to be welded by the peripheral alloy cutter 31, and then using the third motor to fill the weld with welding wire, and at the same time using the robot arm 10 to move the welding wire along the welds on both sides of the alloy 46 to complete the welding of the entire welds on both sides of the alloy 46 on the peripheral alloy cutter 31;

[0099] 5) The position of the peripheral alloy knife 31 is adjusted by the driving unit so that another alloy 46 on the peripheral alloy knife 31 is in the heating induction coil 17, and the peripheral alloy knife 31 is continued to be heated by the heating mechanism 6:

[0100] 6) Repeat steps 3) to 5) to continue welding the weld of the remaining alloy 46 of the peripheral alloy cutter 31;

[0101] 7) After the welding of the peripheral alloy blade 31 is completed, the peripheral alloy blade 31 is sent to a heat preservation furnace for heat preservation treatment to complete the entire brazing operation.

[0102] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic brazing equipment for cemented carbide knives, characterized in that: The invention comprises a wire feeding mechanism (5), a heating mechanism (6) and a clamping mechanism, wherein the heating mechanism (6) comprises a heating induction coil (17), wherein the heating induction coil (17) is used to heat a peripheral alloy knife (31), wherein the clamping mechanism comprises a driving unit and a clamping plate (32), wherein the clamping plate (32) is connected to the movable end of the driving unit, wherein the clamping plate (32) is used to clamp the peripheral alloy knife (31) in the heating induction coil (17), wherein the driving unit is used to drive the peripheral alloy knife (31) on the clamping plate (32) to move to the wire feeding mechanism (5), wherein the wire feeding mechanism (5) is used to transport welding wire into the weld of the heated peripheral alloy knife (31).

2. The automatic brazing equipment for cemented carbide knives according to claim 1 is characterized in that: The wire feeding mechanism (5) comprises a mounting frame and a robot arm (10), wherein the robot arm (10) is fixed on the mounting frame; The robot arm (10) is provided with a mounting plate (11), both ends of the mounting plate (11) are provided with connecting plates, the connecting plates are hinged to the mounting plate (11), and the connecting plates are provided with wire feeding tubes (12); The robot arm (10) is also provided with a third motor, and the output end of the third motor is provided with a winding disk, and welding wire is wound on the winding disk, and the welding wire passes through the wire feeding tube (12).

3. The automatic brazing equipment for cemented carbide knives according to claim 1 is characterized in that: The heating mechanism (6) comprises a support platform (13), a mounting platform (14), and a medium frequency induction heating box (16); a first lifting unit is provided at the bottom of the support platform (13); an output end of the first lifting unit passes through the support platform (13) and is connected to the bottom of the mounting platform (14); A plurality of first vertical rods (15) are also provided at the bottom of the mounting platform (14), and the first vertical rods (15) vertically penetrate the top of the supporting platform (13); The medium frequency induction heating box (16) is fixed on the mounting platform (14), and the heating induction coil (17) is located on the side wall of the medium frequency induction heating box (16).

4. The automatic brazing equipment for cemented carbide knives according to claim 1 is characterized in that: It also includes a base plate (1), the driving unit includes a first motor (19) and a second motor (26), and there are two clamping plates (32); The first motor (19) and the second motor (26) are both fixed on the base plate (1); a first screw rod (22) is provided at the output end of the first motor (19); a first movable block (23) is provided on the first screw rod (22); a first clamping frame (2) is provided on the first movable block (23); one of the clamping plates (32) is located on the first clamping frame (2); The output end of the second motor (26) is provided with a second screw rod (24), the second screw rod (24) is provided with a second movable block (25), the second movable block (25) is provided with a second clamping frame (4), and the other clamping plate (32) is fixed on the second clamping frame (4).

5. The automatic brazing equipment for cemented carbide tools according to claim 4 is characterized in that: The bottom plate (1) is also provided with two first slides (20), the first slides (20) are provided with a plurality of first sliders (21) and second sliders (27), the first clamping frame (2) is connected to the first sliders (21), and the second clamping frame (4) is connected to the second sliders (27).

6. The automatic brazing equipment for cemented carbide tools according to claim 4, characterized in that: The first clamping frame (2) comprises a first mounting plate (35), a cylinder (29) and a second mounting plate (36); the cylinder (29) is fixed on both sides of the first mounting plate (35); and a connecting piece (18) is provided at the output end of the cylinder (29); A second slide (34) is also provided on the top of the first mounting plate (35), a third slide block connected to the connecting member (18) is provided on the second slide block (34), and the bottom of the second mounting plate (36) is connected to the third slide block; The clamping plate (32) is fixed on the second mounting plate (36).

7. The automatic brazing equipment for cemented carbide tools according to claim 6, characterized in that: The first clamping frame (2) further comprises a third mounting plate (28), the first movable block (23) and the first sliding block (21) are both connected to the third mounting plate (28), a second lifting unit (39) and a plurality of supporting columns (40) are also provided on the top of the third mounting plate (28), a second vertical rod is provided inside the supporting column (40), the top of the second vertical rod is connected to the bottom of the first mounting plate (35), a fourth mounting plate (33) is also provided between the third mounting plate (28) and the first mounting plate (35), and the fourth mounting plate (33) is sleeved on the second vertical rod; The output end of the second lifting unit (39) passes through the fourth mounting plate (33) and is connected to the bottom of the first mounting plate (35).

8. The automatic brazing equipment for cemented carbide knives according to claim 7 is characterized in that: A groove is also provided on one side of the fourth mounting plate (33), a third motor (37) is provided in the groove, a rotating plate is provided at the output end of the third motor (37), a connecting block (42) is provided on the rotating plate, a notch (66) is provided on the connecting block (42), a fixing rod is provided on the inner wall of the notch (66), the fixing rod is connected to the connecting block (42) by a thread, and a limiting section (67) is provided on the fixing rod.

9. The automatic brazing equipment for cemented carbide knives according to claim 1, characterized in that: A clamping groove (43) is provided on one side of the clamping plate (32); The clamping plate (32) is provided with a channel (49) inside, and the clamping plate (32) is also provided with a water inlet (44) and a water outlet (45), and both the water inlet (44) and the water outlet (45) are in communication with the channel (49).

10. An automated brazing method for cemented carbide knives, characterized in that: The following steps are involved: 1) placing the peripheral alloy knife (31) to be welded on the clamping plate (32), allowing the peripheral alloy knife (31) to pass through the heating induction coil (17), adjusting the driving unit, and fixing the peripheral alloy knife (31) on the clamping plate (32); 2) using a driving unit to adjust the position of the peripheral alloy knife (31) so that one of the alloys (46) of the peripheral alloy knife (31) is located in the heating induction coil (17), and using a heating mechanism (6) to heat the peripheral alloy knife (31); 3) When the temperature of the peripheral alloy knife (31) is heated to the required temperature for melting the brazing material, the peripheral alloy knife (31) is continuously and stably heated for 30 seconds, and the heated peripheral alloy knife (31) is moved to the wire feeding mechanism (5) by using the driving unit; 4) using the robot arm (10) to drive the wire feeding tube (12) to move to the welds on both sides of the alloy (46) to be welded on the peripheral alloy knife (31), and then using the third motor to fill the weld with welding wire, and at the same time using the robot arm (10) to move the welding wire along the welds on both sides of the alloy (46), so as to complete the welding of the entire welds on both sides of the alloy (46) on the peripheral alloy knife (31); 5) Using the driving unit to adjust the position of the peripheral alloy knife (31) so that another alloy (46) on the peripheral alloy knife (31) is located in the heating induction coil (17), and using the heating mechanism (6) to continue heating the peripheral alloy knife (31): 6) Repeat steps 3) to 5) to continue welding the weld of the remaining alloy (46) of the peripheral alloy cutter (31); 7) After the welding of the peripheral alloy blade (31) is completed, the peripheral alloy blade (31) is sent to a heat preservation furnace for heat preservation treatment to complete the entire brazing operation.

Images