Diffusion brazing machine capable of easily leveling die

Abstract

The diffusion brazing machine comprises an electric cabinet, a workbench, a fixed mold, a movable mold, a lifting driving mechanism, a first electric connecting part and a second electric connecting part, the movable plate is fixed to the lifting end of the lifting driving mechanism, the adjusting plate is located below the movable plate, a limiting hole at least penetrating through the lower surface of the movable plate is formed in the middle of the movable plate, and the hemispherical supporting block comprises a plane fixedly connected with the middle of the upper surface of the adjusting plate and a hemispherical face making contact with the edge line of the limiting hole. The movable mold is fixed to the lower surface of the adjusting plate, a plurality of adjusting bolts and a plurality of fixing bolts which penetrate through the movable plate and are rotationally inserted into the adjusting plate are evenly distributed on the annular side of the limiting hole, the distance between the fixing bolts and the center of the limiting hole is smaller than that between the adjusting bolts and the center of the limiting hole, and the adjusting bolts are in limiting fit with the adjusting plate in the axial direction. The adjusting bolt is in threaded connection with the movable plate; the adjusting bolt rotates to drive the adjusting plate to be close to or away from the movable plate so as to level the movable mold.

Description

TECHNICAL FIELD

[0001] The utility model relates to diffusion brazing equipment technical field, especially to an easily leveled mold diffusion brazing machine. BACKGROUND

[0002] Resistance diffusion brazing is to make current pass through the joint of two metal workpieces to be joined, to heat the filler metal arranged at the joint by the resistance heat generated at the joint, to fill the gap at the joint of the workpiece after the filler metal is melted, to realize the welding mode of workpiece jointing, which has the characteristics of large pull-off force after workpiece jointing and low local heating energy consumption, can reduce product processing cost, and is widely used in the processing of small precision parts. The resistance diffusion brazing machine generally includes a fixed mold and a movable mold, the movable mold is installed on a movable support, and the movable support and the movable mold are driven to descend by a lifting driving mechanism, so that the movable mold drives a workpiece to approach another workpiece on the fixed mold and contact the filler metal on the workpiece. In this way, when the diffusion brazing machine is powered on, the current is conducted through the filler metal, so that the resistance heat is generated when the current passes through the filler metal, thereby melting the filler metal. The movable mold is generally fixed on the movable support by a tight fitting connection, and before the diffusion brazing operation, the parallelism of the movable mold and the fixed mold needs to be adjusted, so that the parts of the movable mold and the fixed mold in contact are flush, so that the gap of the two workpiece fitting parts is equal, so as to improve the welding effect. At present, in the workshop operation, the operation personnel mainly knock the movable mold by tools, gradually level the movable mold, and control the parallelism of the contact part of the movable mold and the fixed mold. This process often needs to continue for several hours, which is time-consuming, so that the leveling efficiency of the movable mold is low, and then the welding efficiency of the product is affected. SUMMARY

[0003] Therefore, it is necessary to provide an easily leveled mold diffusion brazing machine, which can quickly level the movable mold and improve the leveling efficiency of the movable mold.

[0004] The diffusion brazing machine for easily leveling the mold comprises an electric control box, a workbench, a fixed mold fixed on the workbench and loaded with a first workpiece, a movable mold located above the fixed mold and loaded with a second workpiece, a lifting driving mechanism for driving the movable mold to approach or move away from the fixed mold, the fixed mold is provided with a first electric connection part in contact with the first workpiece and electrically connected with the electric control box, and the movable mold is provided with a second electric connection part in contact with the second workpiece and electrically connected with the electric control box; further comprising a movable plate fixed on the lifting end of the lifting driving mechanism, an adjusting plate located below the movable plate, and a hemispherical support block, a limiting hole penetrating through the lower surface of the movable plate is formed in the middle part of the movable plate, the hemispherical support block comprises a flat surface fixedly connected with the middle part of the upper surface of the adjusting plate and a hemispherical surface in contact with the edge line of the limiting hole to abut against the movable plate, the movable mold is fixed on the lower surface of the adjusting plate, a plurality of adjusting bolts and a plurality of fixing bolts penetrating through the movable plate and rotatingly inserted into the adjusting plate are uniformly distributed on the ring side of the limiting hole, the distance from the fixing bolt to the center of the limiting hole is smaller than the distance from the adjusting bolt to the center of the limiting hole, the adjusting bolt is limitedly matched with the adjusting plate along the axial direction, and the adjusting bolt is threadedly connected with the movable plate; the adjusting bolt is rotated to drive the adjusting plate to approach or move away from the movable plate, so as to level the movable mold.

[0005] In one of the embodiments, four fixing bolts and four adjusting bolts are uniformly arranged on the ring side of the limiting hole, and the included angle between the line connecting the two fixing bolts in sequence and the line connecting the two adjusting bolts in sequence is 30-60°.

[0006] In one of the embodiments, the hemispherical support block is screw-fixed on the upper surface of the adjusting plate, or the hemispherical support block is welded on the upper surface of the adjusting plate, or the hemispherical support block is bonded on the upper surface of the adjusting plate.

[0007] In one of the embodiments, the limiting hole penetrates through the upper and lower surfaces of the movable plate.

[0008] In one of the embodiments, the diffusion brazing machine further comprises a plurality of upper C-shaped clamping rings and a plurality of lower C-shaped clamping rings, the lower part of the adjusting bolt is provided with a first annular limiting groove and a second annular limiting groove located above the first annular limiting groove, the movable plate is provided with a plurality of threaded holes corresponding to the adjusting bolts, the adjusting plate is provided with a plurality of through holes corresponding to the adjusting bolts, each adjusting bolt passes through a threaded hole and a through hole and is threadedly matched with the threaded hole, the lower C-shaped clamping ring is located below the adjusting plate and is embedded in the first annular limiting groove, the upper surface of the lower C-shaped clamping ring abuts against the lower edge of the through hole, and the upper C-shaped clamping ring is located above the adjusting plate and is embedded in the second annular limiting groove, the upper surface of the upper C-shaped clamping ring abuts against the upper edge of the through hole.

[0009] In one of the embodiments, the diffusion brazing machine further comprises a positioning plate located above the movable plate and fixedly connected with the external support or the workbench, and at least two guide rods arranged on two opposite sides of the fixed mold and fixedly connected with the workbench, the guide rods extending in the vertical direction and sliding through the movable plate; the lifting driving mechanism comprises at least a main cylinder fixed on the upper surface of the positioning plate, and the piston rod of the main cylinder penetrates through the positioning plate and is fixedly connected with the middle part of the movable plate.

[0010] In one of the embodiments, the guide rods penetrate through the positioning plate and are fixedly connected with the positioning plate.

[0011] In one of the embodiments, the lifting driving mechanism further comprises an auxiliary connecting member, the auxiliary connecting member comprising an upper fixed plate, a lower fixed plate located below the upper fixed plate, a connecting plate located between the upper fixed plate and the lower fixed plate and fixedly connected with the upper fixed plate and the lower fixed plate, the upper fixed plate, the lower fixed plate and the connecting plate surrounding an operation area, at least one operation opening being formed in the connecting plate and communicating the inside and outside of the operation area, the piston rod of the main cylinder being inserted into the operation area and fixedly connected with the upper fixed plate, and the lower fixed plate being screw-connected with the movable plate.

[0012] In one of the embodiments, the movable plate is provided with four penetrating holes corresponding to the guide rods and penetrating through the upper and lower surfaces of the movable plate, and each penetrating hole is fixed with a bearing, and the guide rods penetrate through the bearings and are slidingly matched with the bearings.

[0013] In one of the embodiments, a first insulation pad is arranged between the lower surface of the adjusting plate and the upper surface of the movable mold, and at least one second insulation pad is arranged between the lower surface of the fixed mold and the workbench.

[0014] The diffusion brazing machine with the easily leveled mold of the utility model, the hemispherical support blocks are fixed on the adjusting plate, the limiting holes are formed on the movable plate, in the process of rotating the adjusting bolts, the hemispherical surface of the hemispherical support blocks continuously contacts with the edge line of the limiting holes to abut against the movable plate, the local part of the adjusting plate is driven by the adjusting bolts to approach or move away from the movable plate, the inclination angle of the adjusting plate is gradually adjusted, until the contact part of the movable mold and the fixed mold is flush, the leveling of the movable mold is realized, in the process, the hemispherical surface of the hemispherical support blocks continuously abuts against the edge of the limiting hole to support the inclination angle adjustment of the movable mold, only the adjusting bolts need to be rotated, the movable mold can be quickly leveled, the leveling time of the movable mold is shortened, the leveling efficiency of the movable mold is improved, and the welding efficiency of the product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a structural schematic view of the diffusion brazing machine in one of the embodiments of the utility model;

[0016] Fig. 2The utility model discloses an embodiment of the utility model removes the main view of electric control box and work table after diffusion brazing machine.

[0017] Fig. 3 The utility model discloses an embodiment of the utility model removes the main view of electric control box and work table after diffusion brazing machine. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned purpose, features and advantages of the utility model more apparent, obvious and easy to understand, the specific embodiment of the utility model is described in detail below in combination with the drawings. In the following description, a lot of specific details are set forth in order to fully understand the utility model. But the utility model can be implemented in many other ways different from the description, and the person skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the following disclosed specific embodiments.

[0019] Please combine Figs. 1-3The utility model discloses an easy to level die's diffusion brazing machine, this diffusion brazing machine includes electric control box 100, workstation 200, the fixed die 300 of being fixed on workstation 200 and loading first workpiece, the movable die 400 of being located fixed die 300 top and loading second workpiece, the lifting drive mechanism 500 of driving movable die 400 close or away from fixed die 300, be equipped with with first workpiece contact and electric connection electric control box 100 first electric connection part on fixed die 300, be equipped with with second workpiece contact and electric connection electric control box 100 second electric connection part on movable die 400, and the welding operation area is formed between fixed die 300 and movable die 400. In the embodiment, first workpiece and second workpiece are all conductive materials. Preferably, in the embodiment, first workpiece and second workpiece are all made of copper material. Of course, according to actual welding demand, first workpiece and second workpiece can also be aluminum material or zinc material or other solid conductive metal material, and the material of first workpiece and second workpiece can be same, also can be different. First workpiece and second workpiece are respectively corresponded fixed on fixed die and movable die through buckle connection or magnetic force adsorption mode, or are directly corresponded and placed on fixed die and movable die. Electric control box 100 is equipped with the controller that is electrically connected with lifting drive mechanism 500, first electric connection part and second electric connection part and the power supply that provides the electric energy for controller, and the output end of controller is still connected with the transformer that is electrically connected with first electric connection part and second electric connection part, and the controller is PLC controller or single-chip microcomputer, and the shell surface of electric control box 100 is equipped with touch display screen 110 that is electrically connected with controller, voltmeter 120 and ammeter 130, so that operating personnel can understand the working condition of diffusion brazing machine according to the display of touch display screen 110, voltmeter 120 and ammeter 130, or send instruction to controller through touch display screen 110 to adjust the working parameter of diffusion brazing machine. The bottom of workstation 200 and electric control box 100 is all fixed with supporting leg 140, to elevate the height of the bottom of diffusion brazing machine, avoid the water or oil of workshop ground to enter electric control box 100. In addition, the bottom of workstation 200 and electric control box 100 is also equipped with universal wheel or roller 150, to reduce the moving difficulty of diffusion brazing machine.

[0020] In order to realize the leveling of the movable mold 400, the diffusion brazing machine further comprises a movable plate 600 fixed on the lifting end of the lifting driving mechanism 500, an adjusting plate 700 located below the movable plate 600, and a hemispherical support block 800. The middle part of the movable plate 600 is provided with a limiting hole 610 penetrating through the lower surface of the movable plate 600. The hemispherical support block 800 comprises a flat surface fixedly connected to the middle part of the upper surface of the adjusting plate 700 and a hemispherical surface in contact with the edge line of the limiting hole 610 to abut against the movable plate 600. In the embodiment, the edge of the limiting hole 610 provides support for the hemispherical surface of the hemispherical support block 800, and the space in the hole of the limiting hole 610 provides a space for avoiding the hemispherical surface, so that the hemispherical support block 800 can continuously contact the edge line of the limiting hole 610. In an embodiment, the limiting hole 610 only penetrates through the lower surface of the movable plate 600. In another embodiment, the limiting hole 610 penetrates through the upper and lower surfaces of the movable plate 600. The depth of the limiting hole 610 needs to meet the condition that when the hemispherical support block 800 cooperates with the limiting hole 610, the hemispherical surface is always in contact with the edge line of the limiting hole 610. The movable mold 400 is fixed on the lower surface of the adjusting plate 700. The ring side of the limiting hole 610 is uniformly distributed with a plurality of adjusting bolts 620 and a plurality of fixing bolts 630 penetrating through the movable plate 600 and rotatingly inserted into the adjusting plate 700. The distance from the fixing bolt 630 to the center of the limiting hole 610 is smaller than the distance from the adjusting bolt 620 to the center of the limiting hole 610. The adjusting bolt 620 is limitedly matched with the adjusting plate 700 along the axial direction, and the adjusting bolt 620 is threadedly connected with the movable plate 600. When the adjusting bolt 620 rotates, the adjusting plate 700 is driven to approach or move away from the movable plate 600, so as to level the movable mold 400.

[0021] In this embodiment, the adjusting plate 700 includes a middle region fixed with the hemispherical support blocks 800 and an edge region surrounding the middle region, and the middle region of the adjusting plate 700 is connected with the middle region of the movable plate 600 through the plurality of fixing bolts 630 to define the distance therebetween. The edge region of the adjusting plate 700 is limited by the edge region of the movable plate 600 through the plurality of adjusting bolts 620, so that the edge of the adjusting plate 700 is moved to the direction of approaching the movable plate 600 to be lifted or to the direction of moving away from the movable plate 600 to be lowered by rotating the adjusting bolt 620, so as to realize the fine adjustment of the inclination angle of the adjusting plate 700 until the contact surface of the movable mold 400 and the fixed mold 300 is flush (in this state, the movable mold 400 is completed to be leveled). Preferably, the limiting hole 610 is a circular hole to increase the contact area of the limiting hole 610 and the hemispherical surface of the hemispherical support block 800, and in the process of lifting or lowering the edge of the adjusting plate 700 by rotating the adjusting bolt 620, the hemispherical support block 800 rotates relative to the limiting hole 610, and the hemispherical surface is always in contact with the edge line of the limiting hole 610 (the position of the hemispherical surface in contact with the edge line of the limiting hole 610 continuously changes), thereby improving the reliability of the support of the adjusting plate 700 by the movable plate 600 when the angle of the adjusting plate 700 is adjusted. It is emphasized that in order to adapt to the adjustment of the inclination angle of the adjusting plate 700, the fixing bolt 630 is not locked between the movable plate 600 and the adjusting plate 700, so that the adjusting plate 700 can be swung to be fine adjusted under the driving of the adjusting bolt 620.

[0022] In an embodiment, the limiting hole 610 is uniformly provided with four fixing bolts 630 and four adjusting bolts 620 on the side, and the included angle between the connecting line of the two sequentially adjacent fixing bolts 630 and the connecting line of the two sequentially adjacent adjusting bolts 620 is 30-60°. In this embodiment, the adjusting plate 700 is a rectangular plate structure, one adjusting bolt 620 is arranged at each of the four corner portions of the adjusting plate 700, and one fixing bolt 630 is arranged at each of the four edges of the adjusting plate 700. By making the included angle between the connecting line of the two sequentially adjacent fixing bolts 630 and the connecting line of the two sequentially adjacent adjusting bolts 620 be 30-60°, the fixing bolts 630 and the adjusting bolts 620 are arranged in a staggered manner, which can avoid the influence on the strength of the plate body caused by the large number of locally arranged bolts on the movable plate 600 and the adjusting plate 700, so as to prolong the service life of the movable plate 600 and the adjusting plate 700. Preferably, in this embodiment, the included angle between the connecting line of the two sequentially adjacent fixing bolts 630 and the connecting line of the two sequentially adjacent adjusting bolts 620 is 45°.

[0023] The radius of the semi-spherical supporting block 800 is greater than the radius of the limiting hole 610, so that the semi-spherical surface of the semi-spherical supporting block 800 can always be in contact with the edge line of the limiting hole 610 during the adjustment of the inclination angle of the adjustment plate 700. In this embodiment, the semi-spherical supporting block 800 is fixed on the upper surface of the adjustment plate 700 by screws, or the semi-spherical supporting block 800 is welded on the upper surface of the adjustment plate 700, or the semi-spherical supporting block 800 is bonded on the upper surface of the adjustment plate 700. In this way, when the adjusting bolt 620 drives the adjustment plate 700 to swing to adjust the inclination angle of the adjustment plate 700, the semi-spherical supporting block 800 can swing synchronously with the adjustment plate 700 and be in contact with the edge line of the limiting hole 610. Thus, the cooperation of the movable plate 600 and the semi-spherical supporting block 800 through the limiting hole 610 can support the adjustment of the inclination angle of the adjustment plate 700, so as to reduce the swing of the adjustment plate 700.

[0024] In order to realize the limiting cooperation of the adjusting bolt 620 with the adjustment plate 700 along the axial direction of the adjusting bolt 620, in an embodiment, the diffusion brazing machine further comprises a plurality of upper C-shaped clamping rings and a plurality of lower C-shaped clamping rings. The lower part of the adjusting bolt 620 is provided with a first annular limiting groove and a second annular limiting groove located above the first annular limiting groove. The movable plate 600 is provided with a plurality of threaded holes 640 corresponding to each adjusting bolt 620. The adjustment plate 700 is provided with a plurality of through holes 710 corresponding to each adjusting bolt 620. Each adjusting bolt 620 passes through a threaded hole 640 and a through hole 710 and is in threaded cooperation with the threaded hole 640. The lower C-shaped clamping ring is located below the adjustment plate 700 and is embedded in the first annular limiting groove. The upper surface of the lower C-shaped clamping ring abuts against the lower edge of the through hole 710. The upper C-shaped clamping ring is located above the adjustment plate 700 and is embedded in the second annular limiting groove. The upper surface of the upper C-shaped clamping ring abuts against the upper edge of the through hole 710. In this way, through the clamping cooperation of the lower C-shaped clamping ring with the first annular limiting groove on the adjusting bolt 620 and the limiting abutment of the lower C-shaped clamping ring with the lower edge of the through hole 710, and through the clamping cooperation of the upper C-shaped clamping ring with the second annular limiting groove on the adjusting bolt 620 and the limiting abutment of the upper C-shaped clamping ring with the upper edge of the through hole 710, while satisfying the rotation of the adjusting bolt 620 relative to the adjustment plate 700, the upper C-shaped clamping ring and the lower C-shaped clamping ring limit the adjusting bolt 620 on the adjustment plate 700, which can prevent the adjusting bolt 620 from falling off the adjustment plate 700, and limit the movement of the adjusting bolt 620 and the adjustment plate 700 along the axial direction of the adjusting bolt 620, so that the adjustment plate 700 can be close to or away from the movable plate 600 under the driving of the adjusting bolt 620 during the rotation of the adjusting bolt 620.

[0025] To realize the guidance of the lifting process of the movable plate 600, in an embodiment, the diffusion brazing machine further comprises a positioning plate 900 located above the movable plate 600 and fixedly connected with the external support or the workbench 200, and at least two guide rods 910 arranged on two opposite sides of the fixed mold 300 and fixedly connected with the workbench 200, the guide rods 910 extending in the vertical direction and sliding through the movable plate 600; the lifting driving mechanism 500 at least comprises a main cylinder 510 fixed on the upper surface of the positioning plate 900, and the piston rod of the main cylinder 510 passes through the positioning plate 900 and is fixedly connected with the middle part of the movable plate 600. By arranging the guide rods 910, the lifting path of the movable plate 600, the movable mold 400 and the second workpiece is defined, and the problem that the to-be-welded parts of the first workpiece and the second workpiece cannot be aligned due to the shaking of the movable plate 600, the movable mold 400 and the second workpiece in the horizontal direction can be avoided. Further, the lifting driving mechanism 500 further comprises a first auxiliary cylinder 520 and a second auxiliary cylinder 530 symmetrically arranged on both sides of the main cylinder 510 and synchronously extended and retracted with the main cylinder 510, the piston rod of the first auxiliary cylinder 520 passes through the positioning plate 900 and is fixedly connected with the edge of one side of the movable plate 600, and the piston rod of the second auxiliary cylinder 530 passes through the positioning plate 900 and is fixedly connected with the edge of the other side of the movable plate 600. In this embodiment, the pulling and pushing force of the lifting driving mechanism 500 on the movable plate 600 and the movable mold 400 mainly comes from the main cylinder 510, and the first auxiliary cylinder 520 and the second auxiliary cylinder 530 are used to adjust the inclination of the edge part of the movable plate 600, so that the movable plate 600 can keep balance during the lifting process, the stable lifting of the second workpiece and the movable mold 400 is ensured, and by controlling the extension and retraction amount of the piston rod of the first auxiliary cylinder 520 to be consistent with the extension and retraction amount of the piston rod of the second auxiliary cylinder 530, the parallelism of the lifting process of the movable plate 600 and the movable mold 400 can be ensured. In addition, when the piston rod of the main cylinder 510 breaks, the first auxiliary cylinder 520 and the second auxiliary cylinder 530 provide instantaneous support for the movable plate 600, the movable mold 400 and the second workpiece, so as to avoid the instantaneous falling of the movable mold 400 in the free-fall state or convert the instantaneous falling of the movable mold 400 into controllable slow falling, so as to avoid injuring the workers or damaging the articles or devices, and to improve the reliability of the structure of the diffusion brazing machine and the safety of the operation.

[0026] The positioning plate 900 can be installed on the workbench 200 or fixed on an external mechanism. In an embodiment, the positioning plate 900 is suspended above the movable plate 600 and fixedly connected with an external mechanism such as a mechanism or a cantilever, in other words, the positioning plate 900 is arranged above the movable plate 600 in a suspended manner. In another embodiment, the guide rod 910 passes through the positioning plate 900 and is fixedly connected with the positioning plate 900. Preferably, the guide rod 910 passes through the positioning plate 900 and is locked on the positioning plate 900 by a nut.

[0027] In order to facilitate the fixed connection of the piston rod of the main cylinder 510 and the middle part of the movable plate 600, in an embodiment, the lifting driving mechanism 500 further comprises an auxiliary connecting piece 540. The auxiliary connecting piece 540 comprises an upper fixed plate 541, a lower fixed plate 542 located below the upper fixed plate 541, and a connecting plate 543 located between the upper fixed plate 541 and the lower fixed plate 542 and fixedly connected with the upper fixed plate 541 and the lower fixed plate 542. The upper fixed plate 541, the lower fixed plate 542, and the connecting plate 543 enclose an operation area. The connecting plate 543 is provided with at least one operation opening communicating the inside and outside of the operation area. The piston rod of the main cylinder 510 is inserted into the operation area and fixedly connected with the upper fixed plate 541. The lower fixed plate 542 is screw-connected with the movable plate 600. The auxiliary connecting piece 540 further comprises a mounting nut 544. The piston rod of the main cylinder 510 passes through the upper fixed plate 541. The mounting nut 544 is sleeved on the piston rod of the main cylinder 510 and screw-connected with the piston rod of the main cylinder 510. The top of the mounting nut 544 abuts against the lower surface of the upper fixed plate 541. The auxiliary connecting piece 540 is in the form of a square tube as a whole, or the projection of the connecting plate 543 in the horizontal plane is in the form of a U-shaped structure. By arranging the auxiliary connecting piece 540, the lower fixed plate 542 of the auxiliary connecting piece 540 abuts against the upper edge of the limiting hole 610 on the one hand, so as to improve the structural strength of the area around the limiting hole 610. On the other hand, when the lower fixed plate 542 is connected with the movable plate 600, the screw-connection position of the two is located at the edge of the limiting hole 610, so as to facilitate the fixed connection of the piston rod of the main cylinder 510 and the middle part of the movable plate 600. In addition, by arranging the auxiliary connecting piece 540, the entire lower surface of the lower fixed plate 542 is in contact with the upper surface of the movable plate 600 when the diffusion brazing machine is assembled, so as to increase the connection area of the piston rod of the main cylinder 510 and the movable plate 600, and further improve the stability of the connection of the piston rod of the main cylinder 510 and the movable plate 600.

[0028] In an embodiment, the movable plate 600 is provided with a pair of guiding rods 910 and four penetrating holes penetrating the upper and lower surfaces of the movable plate 600. Each penetrating hole is fixed with a bearing 650. The guiding rod 910 penetrates the bearing 650 and is in sliding fit with the bearing 650. Preferably, the bearing 650 is a tapered roller bearing, a deep groove ball bearing, a cylindrical roller bearing, or an angular contact ball bearing. By fixing the bearing 650 on the movable plate 600, the resistance during the lifting of the movable plate 600 and the wear of the guiding rod 910 can be reduced, the service life of the guiding rod 910 can be prolonged, the problem of the horizontal shaking of the movable plate 600 caused by the wear of the guiding rod 910 can be avoided, and the stability of the lifting of the movable plate 600 can be improved.

[0029] In an embodiment, a first insulating pad 720 is arranged between the lower surface of the adjusting plate 700 and the upper surface of the movable mold 400, and at least one second insulating pad 210 is arranged between the lower surface of the fixed mold 300 and the workbench 200. The first insulating pad 720 and the second insulating pad 210 are both made of insulating materials, for example, the first insulating pad 720 and the second insulating pad 210 are made of rubber pads or plastic plates. Since the movable mold 400 and the fixed mold 300 jointly constitute the discharge mechanism of the diffusion brazing machine, by arranging the first insulating pad 720 and the second insulating pad 210, the discharge mechanism is isolated from the ground and the metal devices on the rest of the diffusion brazing machine, so that the discharge mechanism forms an independent insulator, the power of the transformer in the electric control box 100 cannot be dispersed, so as to concentrate all the energy on the fixed mold 300 and the movable mold 400, which can reduce the current impact on the power system (power source) during the heating process of the diffusion brazing machine, compared with the traditional resistance welding mechanism, 30% of the electric energy can be saved, and the phenomenon of sharp discharge and arc striking of the related bolts and other parts on the diffusion brazing machine can be prevented, and the safety of the operation is ensured.

[0030] In addition, the diffusion brazing machine of the embodiment further comprises a temperature sensor 920 fixed on the workbench 200 and corresponding to the welding work area, and the temperature sensor 920 is electrically connected with the controller in the electric control box 100. In this way, the temperature sensor 920 collects the welding temperature of the first workpiece and the second workpiece of the diffusion brazing machine in real time and transmits the detected temperature value to the controller, so that the controller feeds back and adjusts the voltage at the first electric connection part and the second electric connection part, thereby achieving the purpose of dynamically adjusting the welding temperature of the workpiece.

[0031] The diffusion brazing machine with the easily leveled mold of the utility model is characterized in that the hemispherical support block 800 is fixed on the adjusting plate 700, and the limiting hole 610 is arranged on the movable plate 600. During the rotation of the adjusting bolt 620, the hemispherical surface of the hemispherical support block 800 continuously contacts the edge line of the limiting hole 610 to abut against the movable plate 600. By adjusting the local position of the adjusting plate 700 close to or away from the movable plate 600 through the adjusting bolt 620, the inclination angle of the adjusting plate 700 is gradually adjusted until the contact part of the movable mold 400 and the fixed mold 300 is flush, and the leveling of the movable mold 400 is realized. During the process, the hemispherical surface of the hemispherical support block 800 continuously abuts against the edge of the limiting hole 610 to support the adjustment of the inclination angle of the movable mold 400. By rotating the adjusting bolts 620, the movable mold 400 can be leveled in only a few minutes, the rapid leveling of the movable mold 400 can be realized, the leveling efficiency of the movable mold 400 is improved, and the welding efficiency of the product is improved.

[0032] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as the combination of the technical features does not exist in contradiction, it shall be considered as within the scope of the present disclosure.

[0033] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it shall not be understood as a limitation on the scope of the present application. It should be noted that, for those skilled in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A diffusion brazing machine with an easily leveled mold, comprising an electrical control box, a worktable, a fixed mold fixed on the worktable and loading a first workpiece, a movable mold located above the fixed mold and loading a second workpiece, and a lifting drive mechanism for driving the movable mold closer to or further away from the fixed mold; the fixed mold is provided with a first electrical connection part that contacts the first workpiece and is electrically connected to the electrical control box, and the movable mold is provided with a second electrical connection part that contacts the second workpiece and is electrically connected to the electrical control box; characterized in that, It also includes a movable plate fixed to the lifting end of the lifting drive mechanism, an adjusting plate located below the movable plate, and a hemispherical support block. The movable plate has a limiting hole in its middle that penetrates at least through the lower surface of the movable plate. The hemispherical support block includes a plane fixedly connected to the middle of the upper surface of the adjusting plate and a hemispherical surface that contacts the edge of the limiting hole to abut against the movable plate. The movable mold is fixed to the lower surface of the adjusting plate. Multiple adjusting bolts and multiple fixing bolts that penetrate the movable plate and are rotatably inserted into the adjusting plate are evenly distributed around the limiting hole. The distance from the fixing bolt to the center of the limiting hole is less than the distance from the adjusting bolt to the center of the limiting hole. The adjusting bolt is axially fitted with the adjusting plate for limiting, and the adjusting bolt is threadedly connected to the movable plate. When the adjusting bolt rotates, it drives the adjusting plate to move closer to or away from the movable plate to level the movable mold.

2. The diffusion brazing machine with an easily levelable mold according to claim 1, characterized in that, Four fixing bolts and four adjusting bolts are evenly arranged on the side of the limiting hole ring. The angle between the line connecting two adjacent fixing bolts and the line connecting two adjacent adjusting bolts is 30-60°.

3. The diffusion brazing machine with an easily leveled mold according to claim 1, characterized in that, The hemispherical support block is fixed to the upper surface of the adjusting plate with screws, or the hemispherical support block is welded to the upper surface of the adjusting plate, or the hemispherical support block is bonded to the upper surface of the adjusting plate.

4. The diffusion brazing machine with an easily leveled mold according to claim 1, characterized in that, The limiting hole penetrates the upper and lower surfaces of the movable plate.

5. The diffusion brazing machine with an easily levelable mold according to claim 1, characterized in that, It also includes multiple upper C-shaped retaining rings and multiple lower C-shaped retaining rings. The lower part of the adjusting bolt is provided with a first annular limiting groove and a second annular limiting groove located above the first annular limiting groove. Multiple threaded holes corresponding to each adjusting bolt are provided on the movable plate. Multiple through holes corresponding to each adjusting bolt are provided on the adjusting plate. Each adjusting bolt passes through a threaded hole and a through hole and is threadedly engaged with the threaded hole. The lower C-shaped retaining ring is located below the adjusting plate and is embedded in the first annular limiting groove. The upper surface of the lower C-shaped retaining ring abuts against the lower edge of the through hole. The upper C-shaped retaining ring is located above the adjusting plate and is embedded in the second annular limiting groove. The upper surface of the upper C-shaped retaining ring abuts against the upper edge of the through hole.

6. The diffusion brazing machine with an easily levelable mold according to claim 1, characterized in that, It also includes a positioning plate located above the movable plate and fixedly connected to an external support or the worktable, and at least two guide rods arranged on two opposite sides of the fixed mold and fixedly connected to the worktable. The guide rods extend vertically and slide through the movable plate. The lifting drive mechanism includes at least a main cylinder fixed to the upper surface of the positioning plate. The piston rod of the main cylinder passes through the positioning plate and is fixedly connected to the middle of the movable plate.

7. The diffusion brazing machine with an easily levelable mold according to claim 6, characterized in that, The guide rod passes through the positioning plate and is fixedly connected to the positioning plate.

8. The diffusion brazing machine with an easily leveled mold according to claim 6, characterized in that, The lifting drive mechanism also includes an auxiliary connecting component, which includes an upper fixed plate, a lower fixed plate located below the upper fixed plate, and a connecting plate located between the upper fixed plate and the lower fixed plate and fixedly connected to the upper fixed plate and the lower fixed plate. The upper fixed plate, the lower fixed plate, and the connecting plate form an operating area. The connecting plate has at least one operating port connecting the inside and outside of the operating area. The piston rod of the main cylinder is inserted into the operating area and fixedly connected to the upper fixed plate. The lower fixed plate is screwed to the movable plate.

9. The diffusion brazing machine with an easily levelable mold according to claim 1, characterized in that, The movable plate has four through holes corresponding to each guide rod and passing through the upper and lower surfaces of the movable plate. A bearing is fixed at each through hole, and the guide rod passes through the bearing and slides with the bearing.

10. The diffusion brazing machine with an easily leveled mold according to claim 1, characterized in that, A first insulating pad is provided between the lower surface of the adjusting plate and the upper surface of the movable mold, and at least one second insulating pad is provided between the lower surface of the fixed mold and the worktable.

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