A turntable welding equipment

Abstract

The invention discloses a turntable welding device, including a brazing module arranged on a frame, the brazing module including a fixture for clamping a workpiece, and the brazing module providing rotation, swinging and lifting. A tin furnace, a flux control mechanism, and a preheating flow channel are arranged around the brazing module, and a tin cup is included in the tin furnace, and the tin cup is driven to lift by a tin cup lifting mechanism. The upper opening of the tin furnace cooperates with an end cover assembly, and the end cover assembly cooperates with a nitrogen pipeline built into the tin cup to form a welding environment in which the protective gas continuously flows. The preheating flow channel forms a double-flow channel condensation structure, which can accelerate the condensation of the flux dipped on the surface of the workpiece, and can also condense and recover the gaseous flux. The flux control mechanism includes a storage box and a holding box, and the storage box inputs flux into the holding box, and at the same time, the excess flux is returned to the storage box through an overflow design. An automatic tin feeding mechanism is also arranged above the tin furnace, and the automatic tin feeding mechanism can lower the tin bar into the inner tin pot to replenish the tin surface through the rotation of a sprocket.

Description

Technical Field

[0001] The invention relates to the technical field of turntable welding equipment, and in particular to a turntable welding equipment. Background Art

[0002] Traditional welding methods all use manual welding, which requires the use of electric soldering irons, soldering iron tips, tin wires and other equipment. In addition, manual welding must be used during the welding process. The objects being welded are precision devices, so very high requirements are placed on temperature control and welding point control during the welding process.

[0003] A Chinese utility model patent with announcement number CN203380521U discloses an automatic welding machine, including a frame, a workbench is arranged in the frame, a linear guide is installed on the workbench, a slide that can slide left and right along the linear guide is arranged on the linear guide, a motor is arranged on one side of the workbench, the motor is connected to a ball screw through a coupling, the right end of the ball screw is passed through the ball screw seat and cooperates with the thread, the ball screw seat is fixed on the slide, a workpiece mounting position and a workpiece fixing device are arranged on the slide, the welding machine has a fast moving speed and high control accuracy, but during electric welding, the welding environment and welding quality cannot be ensured. Summary of the invention

[0004] The technical solution of the present invention is: a turntable welding machine, including a frame-type frame formed by splicing profiles, a brazing module is arranged on the frame, the brazing module includes a fixture for clamping the workpiece, and the brazing module can provide rotating, swinging and lifting actions.

[0005] A tin furnace, flux control mechanism, and preheating channel are arranged around the brazing module. The tin furnace includes a tin cup, which is driven up and down by a tin cup lifting mechanism. The upper opening of the tin furnace is matched with an end cover assembly, and the end cover assembly cooperates with the nitrogen pipeline built into the tin cup to form a welding environment with continuous flow of protective gas.

[0006] The preheating channel forms a double-channel condensation structure, which can accelerate the condensation of the flux dipped on the workpiece surface and can also condense and recover the gaseous flux.

[0007] The flux control mechanism includes a storage box and a holding box. The storage box inputs flux into the holding box, and at the same time, the excess flux is returned to the storage box through an overflow design.

[0008] An automatic tin feeding mechanism is also arranged above the tin furnace. The automatic tin feeding mechanism can lower the tin bar into the inner tin pot to replenish the tin surface through the rotation of the sprocket.

[0009] The specific structure is: the tin furnace comprises: an inner tin pot, an outer tin pot, and a tin pot base.

[0010] The outer tin pot and the heating and heat insulation parts are installed on the tin pot base. The tin pot base is a rectangular frame formed by connecting profiles. The outer tin pot is placed in the middle of the tin pot base. The outer tin pot and the outer tin pot base are connected and fixed by multiple bolts. The outer tin pot corresponds to the shape of the tin pot base, so the tin furnace includes a sealing plate side, a wiring side, and a bottom side.

[0011] The side of the sealing plate is covered by two heating blocks. Two heating blocks are spliced ​​up and down to form a covering layer with the same area as the side of the outer tin pot. Correspondingly, pin holes for studs are arranged on the heating blocks. A heating block pressure plate is covered on the outside of each heating block, and the heating block pressure plate has the same area as the heating block. At the same time, the heating block pressure plate is also provided with pin holes for studs.

[0012] An inner heat insulation board is covered on the outer side of the heating block pressing plate, and a wire groove is arranged on the inner heat insulation board.

[0013] The difference between the sealing plate side and the wiring side is that on the sealing plate side, an outer insulation plate and a side sealing plate are arranged in sequence on the outer side of the inner insulation plate to form the sealing plate side, while on the wiring side, a support plate and a side sealing plate are arranged on the outer side of the inner insulation plate to form the sealing plate side.

[0014] L-shaped notches are cut at both ends of the inner heat insulation board on the wiring side for centralized wiring, and the support plate is longitudinally supported between the outer edge of the outer tin pot and the tin pot base.

[0015] The bottom surface of the outer tin pot is covered with a heating block, a heating block pressure plate, an inner heat insulation plate, an outer heat insulation plate, and a bottom sealing plate in sequence. Among them, two heating plates are horizontally spliced, and the bottom of the heating plate is also installed by studs. The outer side of the heating plate is covered with a heating block pressure plate and an inner heat insulation plate with a wire trough. The inner heat insulation plate is covered with an outer heat insulation plate and a bottom sealing plate.

[0016] A temperature sensor is installed on the inner side of the corner of the outer tin pot, and the inner tin pot is fixed in the outer tin pot through a Z-shaped connector. The upper end of the connector is fixed on the outer edge of the outer tin pot, and the lower end of the connector is fixed on the bottom surface of the inner tin pot.

[0017] The inner tin pot is fixed in the outer tin pot, and the inner tin pot is a directional trough body, and a circulation channel is arranged at one side of the inner tin pot. The circulation channel is attached to the side wall of the inner tin pot, and its two ends abut against the side wall surfaces on both sides to form a closed connection.

[0018] The circulation channel includes a bent bottom wall, which is sealed and connected with the two side walls of the inner tin pot to form a bottom cavity. The bottom cavity is the main volume of the circulation channel, and the upper end of the bottom wall forms an inwardly bent slope surface, on which a 7-shaped bent wall is installed to form a neck cavity with a reduced diameter.

[0019] The circulation channel includes a top wall, which is arranged parallel to the upper end of the bent wall to form a tin surface outflow outlet. A circulation cavity is provided at one end of the circulation channel, and the circulation cavity is connected to the bottom cavity. The circulation cavity includes an opening for vertically inserting a circulation pump assembly, and the circulation pump continuously injects the tin surface into the circulation channel from the circulation cavity.

[0020] The circulation pump assembly comprises an impeller, a transmission shaft and a motor; the impeller is fitted in the opening and presses the tin surface in the circulation cavity into the circulation channel.

[0021] Two tin cups are arranged in the inner tin pot, and a pipeline for introducing nitrogen atmosphere into the tin pot is arranged in the axial direction of each tin cup. The bottom of the pipeline is connected to an air channel, and the air channel is connected to an external air source.

[0022] The upper edge of the tin furnace is an end cover assembly, wherein the end cover assembly includes a cover frame, a tin furnace cover plate and a tin cup cover plate. The tin furnace cover plate includes: a first orifice opposite to the tin cup opening, and a second orifice for discharging nitrogen out of the tin furnace. The first orifice and the second orifice are connected through a nitrogen flow channel in the bottom surface of the tin furnace cover plate.

[0023] A tin cup cover is covered on the tin furnace cover, and the tin cup cover is covered on the first opening and opens and closes the first opening in a sliding manner. A connecting rod is installed on the tin furnace cover, and one end of the connecting rod is fixed to the surface of the tin furnace cover through a hinge shaft. The tin cup cover is connected to the connecting rod, and the connecting rod drives the tin cup cover to swing with the hinge shaft as the rotation center. At the same time, an arc groove for sliding guidance of the tin cup cover is set on the tin cup cover, and the connecting rod is matched with the arc groove through a bolt.

[0024] A pipe orifice piece is installed on the second opening on the tin furnace cover plate, and the pipe orifice piece can be externally connected to an exhaust device.

[0025] The tin cup lifting mechanism includes: a vertically guided lifting module. The module includes a bracket, a vertical guide rod, and an electric cylinder assembly. The guide rod is equipped with a sliding base, and a vertically arranged connecting rod is clamped on the base. A matching hole is opened on the tin furnace cover plate, and a guide column sleeve is installed in the matching hole. The connecting rod and the guide column sleeve are installed in coordination, and the module extends into the tin furnace through the connecting rod.

[0026] The connecting rod lifts the tin cup through the connecting piece to generate vertical displacement, the bottom of the tin cup is fixedly connected to the connecting piece, and a supporting rod extending vertically upward is arranged on the connecting piece.

[0027] The preheating flow channel includes: an air heater, a ventilator, and a preheating module. The ventilator compresses the air, the ventilator is connected to the air heater through the air channel, and the air heater is connected to the preheating module.

[0028] The preheating module includes an outer body and a center piece, both of which are hollow structures, and the center piece is stacked in the outer body. The center piece serves as a gas flow channel, and the outer body outside the center piece serves as another gas flow channel.

[0029] Specifically, the outer body can be divided into two parts, the upper part and the lower part, that is, the outer ring gas flow channel includes: a hot air flow chamber and a ventilation chamber. The upper side is a closed hot air flow chamber, and the lower side is a ventilation chamber for circulating air. The hot air flow chamber can continuously supply heated air, and the ventilation chamber can provide cold air flow for condensation.

[0030] The center piece is in a straight cylindrical shape, so the inner ring gas flow channel includes two upper and lower non-enclosed ports. The upper port of the center piece corresponds to the top hole on the top plate of the hot air chamber, and the lower port of the center piece corresponds to the lower port of the ventilation chamber.

[0031] The upper port of the center piece is buried under the top hole of the hot gas flow chamber, and an annular expansion is installed in the upper port of the center piece. A sleeve piece for inserting a workpiece is suspended in the annular expansion, and the sleeve piece has connecting ribs extending radially to support and suspend it in the upper port of the inner ring gas flow channel.

[0032] The annular expansion port corresponds to the top hole on the top plate of the hot air flow chamber, and a cover plate is arranged between the top plate and the annular expansion port. The cover plate can cover the matching gap, and at the same time, the cover plate overlaps with the flash edge and the annular expansion port of the sleeve to form a closed fit to prevent the airflow from overflowing, and the corner of the cover plate forms a downwardly covering arc surface, and the arc surface design can effectively dissipate the wall heat upward.

[0033] The cover plate and the annular expansion opening are tightly matched with gaskets spaced apart from each other, and the cover plate, the gasket and the annular expansion opening are contacted and connected and fastened in sequence.

[0034] The hot air flow chamber is connected to an air heater and a ventilator, and a pilot temperature controller is arranged in the hot air flow chamber. The ventilation chamber includes: an air inlet regulated by an air intake controller and an air outlet regulated by a throttle valve.

[0035] A detachable collecting container is arranged on the lower port of the inner ring gas flow channel, and the collecting container is a hemispherical container supported at the lower end of the center piece.

[0036] The soldering flux control mechanism comprises: a closed storage box for storing the soldering flux and a holding box for temporarily storing the soldering flux.

[0037] Among them, an inclined feed port is arranged on the top plate of the storage box, a discharge port for discharging soldering flux is arranged at the bottom of the storage box, and a self-closing valve is arranged on the connecting pipe of the discharge port.

[0038] A universal pump is arranged in the storage box and is installed at the bottom of the storage box through fasteners. A main pipe is connected to the universal pump, which is arranged vertically and passes through the top plate of the storage box. In order to control the normal operation of the universal pump, a capacitive proximity switch is arranged outside the storage box and is arranged near one side of the main pipe. The proximity switch senses that the flux continues to flow in the main pipe, and the proximity switch can determine the working state of the universal pump by detecting the dielectric constant of the capacitor.

[0039] A one-way valve is installed on the main pipeline to control the reflux, and the one-way valve is connected to the holding box through a fluororubber hose. At the same time, a flow control valve is arranged in the fluororubber pipeline to control the flow channel.

[0040] A liquid level sensor is also installed on the storage box; the liquid level sensor measures the height of the flux liquid level through a measuring tube vertically inserted into the storage box.

[0041] The holding box is arranged on the upper side of the storage box, and the holding box is a rectangular slot-shaped chamber. Orifices for flux overflow are opened on the side walls of the holding box, and the orifices are respectively connected to overflow pipes. Two overflow pipes are also arranged in the storage box, and the overflow pipes are also arranged vertically and pass through the top plate of the storage box.

[0042] A placement hole for positioning and inserting the workpiece is arranged in the holding box. The placement hole extends upward from the bottom of the holding box. The holding box outside the placement hole is filled with flux supplied from the storage box. When the workpiece is inserted into the placement hole, it can dip in the flux.

[0043] The automatic tin feeding mechanism comprises: a sprocket, a ratchet, a pawl and a cylinder which are arranged on a base plate.

[0044] Specifically, the sprocket is assembled on a rotating shaft through a connecting key, and the rotating shaft is mounted on a base plate through a bearing. At the same time, a ratchet is assembled on the rotating shaft, and the ratchet rotates synchronously with the sprocket. A chain is sleeved on the sprocket, and a tin bar is hung on the lower end of the chain through a claw hook.

[0045] A pawl is mounted on the seat plate on the upper side of the ratchet and sprocket through a pivot. The pivot is located on the central axis of the sprocket, and two hooks of the pawl are respectively matched with the tooth surfaces on both sides of the ratchet.

[0046] The pawl comprises a first hook and a second hook, and the first hook and the second hook clamp the tooth surface of the ratchet from both sides of the ratchet. A tension spring is arranged between the first hook and the second hook to provide a clamping force, and under the action of the tension spring, the pawl can always maintain a locked state.

[0047] The first hook is driven by the cylinder and generates an upward pushing force. The first hook rotates around the pivot and pushes the ratchet wheel upward to rotate one tooth. On the other side, the tooth located at the second hook on the ratchet wheel pushes the second hook outward as the ratchet wheel rotates, and flips the position of one tooth downward, thereby realizing the rotation of the ratchet wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0049] Figure 1 It is a three-dimensional diagram of the turntable welding equipment;

[0050] Figure 2 This is a partial assembly drawing of the turntable welding equipment;

[0051] Figure 3 This is the assembly drawing of the tin furnace and tin cup lifting mechanism;

[0052] Figure 4 This is the structural disassembly diagram of the tin furnace;

[0053] Figure 5 This is a cross-sectional view of a tin furnace;

[0054] Figure 6 is a front perspective view of the cover plate assembly;

[0055] Figure 7 is a reverse perspective view of the cover plate assembly;

[0056] Figure 8 This is a front perspective view of the tin furnace cover.

[0057] Fig. 9 It is a reverse three-dimensional image of the tin furnace cover;

[0058] Fig.10 It is a three-dimensional diagram of the preheating flow channel structure;

[0059] Fig.11 It is a cross-sectional view of the preheating flow channel structure;

[0060] Fig.12 for Fig.11 A partial enlarged view of the

[0061] Fig.13 A three-dimensional diagram of the flux control mechanism.

[0062] Fig.14 This is the internal structure diagram of the flux control mechanism;

[0063] Fig.15 It is a three-dimensional diagram of the automatic tin feeding mechanism;

[0064] Fig.16 This is the front view of the automatic tin feeding mechanism;

[0065] The following are marked as follows: 1, tin furnace; 11, inner tin pot; 111, bottom wall; 112, bending wall; 113, top wall; 114, circulation chamber; 115, transmission shaft; 116, motor; 12, outer tin pot; 121, heating block; 122, heating block pressing plate; 123, inner insulation board; 124, outer insulation board; 125, wire trough; 126, side sealing plate; 127, support plate; 128, bottom Sealing plate; 13, tin pot base; 14, stud; 15, Z-shaped connector; 16, tin cup; 17, airway; 2, end cover assembly; 21, cover frame; 22, tin furnace cover; 221, first orifice; 222, second orifice; 223, nitrogen flow channel; 23, tin cup cover; 24, fan-shaped connecting rod; 25, arc groove; 26, nozzle piece; 3, flux control mechanism; 31, storage box; 32, storage box holding box; 321, feed port; 322, discharge port; 33, universal pump; 34, main pipeline; 35, capacitive proximity switch; 36, overflow pipe; 37, liquid level sensor; 38, placement hole; 39, one-way valve; 4, preheating flow channel structure; 41, air heater; 42, center piece; 43, outer body; 431, hot air flow chamber; 432, ventilation chamber; 44, flange opening; 45, annular expansion Mouth; 46, sleeve piece; 47, cover plate; 48, gasket; 49, collecting container; 5, tin cup lifting mechanism; 51, bracket; 52, guide rod; 53, electric cylinder assembly; 54, base; 55, guide column sleeve; 56, connecting piece; 6, automatic tin feeding mechanism; 61, seat plate; 62, sprocket; 63, ratchet; 64, tension spring; 65, cylinder; 66, pivot; 67, first hook; 68, second hook. DETAILED DESCRIPTION

[0066] Example 1

[0067] The tin furnace 1 structure includes: an inner tin pot 11, an outer tin pot 12, and a tin pot base 13. The outer tin pot 12 and the heating and heat insulating components are installed on the tin pot base 13, and the inner tin pot 11 is fixed in the outer tin pot 12. The outer tin pot 12 is made of 8mm SUS303 stainless steel plate by bending and welding, and the surface of the outer tin pot 12 includes a ceramic coating.

[0068] The tin pot base 13 is a rectangular frame formed by connecting profiles, and the outer tin pot 12 is placed in the middle of the tin pot base 13. The outer tin pot 12 is fixed to the outer tin pot base 13 by multiple bolts. The outer tin pot 12 corresponds to the tin pot base 13 in shape, so the tin furnace includes a sealing plate side, a wiring side, and a bottom side.

[0069] The four sides of the outer tin pot 12 are sequentially installed with a heating block layer, a heating block pressing plate layer, a heat insulation board layer, etc. The four sides include three sealing board sides and one wiring side. Different from the sealing board side, the wiring layer has only one heat insulation board layer, and the two ends of the heat insulation board are reserved with gaps for wiring.

[0070] Specifically, a series of raised studs 14 are arranged on each side and bottom surface of the outer tin pot 12. In this embodiment, multiple M10 studs are welded on the side and bottom surface of the outer tin pot 12. The side of the sealing plate is covered by two heating blocks 121. The two-shaped heating blocks 121 are spliced ​​up and down to form a covering layer with the same area as the side surface of the outer tin pot 12. Correspondingly, pin holes for matching studs are arranged on the heating blocks 121. The outside of each heating block 121 is covered with a heating block pressing plate 122. The heating block pressing plate 122 has the same area as the heating block 121, and the heating block pressing plate 122 is also arranged with pin holes for matching studs.

[0071] An inner heat insulation board 123 is covered on the outer side of the heating block pressing plate 122 , and a wire groove 125 is arranged on the inner heat insulation board 123 .

[0072] The difference between the sealing plate side and the wiring side is that on the sealing plate side, an outer insulation plate 124 and a side sealing plate 126 are arranged in sequence on the outer side of the inner insulation plate 123 to form the sealing plate side, while on the wiring side, a support plate 127 and a side sealing plate are arranged on the outer side of the inner insulation plate 123 to form the sealing plate side.

[0073] L-shaped notches are cut at both ends of the inner heat insulation board on the wiring side for centralized wiring, and the support plate 127 is longitudinally supported between the outer edge of the outer tin pot 12 and the tin pot base 13.

[0074] The bottom surface of the outer tin pot 12 is covered with a heating block, a heating block pressure plate, an inner heat insulation plate, an outer heat insulation plate, and a bottom sealing plate in sequence. The two heating plates are horizontally spliced, and the bottom of the heating plate is also installed by studs. The outer side of the heating plate is covered with a heating block pressure plate and an inner heat insulation plate with a wire groove in sequence. The inner heat insulation plate is covered with an outer heat insulation plate and a bottom sealing plate 128.

[0075] A temperature sensor is installed on the inner side of the corner of the outer tin pot 12, and the inner tin pot 11 is fixed in the outer tin pot 12 through a Z-shaped connector 15. The upper end of the Z-shaped connector 15 is fixed on the outer edge of the outer tin pot 12, and the lower end of the Z-shaped connector 15 is fixed on the bottom surface of the inner tin pot 11.

[0076] The outer side plate and the bottom sealing plate are both made of 2mm iron plate, and the surface of the iron plate is painted. The side sealing plate and the bottom sealing plate are fixed to the tin pot base by M6 bolts respectively.

[0077] In this embodiment, the size of the heating plate is: 600*80*20, the power is 700W, the power of the entire tin furnace is 8.4kw, and the heating efficiency reaches 365℃±5℃ in about 35min.

[0078] Embodiment 2:

[0079] The inner tin pot 11 is a directional trough body, and a circulation channel is arranged at one side of the inner tin pot 11. The circulation channel is a flow channel arranged along the length or width direction of the inner tin pot 11. The circulation channel is attached to the side wall surface of the inner tin pot 11, and its two ends abut against the side wall surfaces on both sides to form a closed connection.

[0080] The circulation channel includes a bent bottom wall 111, which is sealed and connected to the two side walls of the inner tin pot 12 to form a bottom cavity. The bottom cavity is the main volume of the circulation channel. The upper end of the bottom wall 111 forms a slope that bends inward, and a U-shaped bent wall 112 is installed on the slope to form a neck cavity. From the cross-sectional view, the bottom cavity is a neck cavity with a reduced diameter upward.

[0081] The circulation channel includes a top wall 113, which is arranged parallel to the upper end of the bent wall 112 to form a tin surface outflow outlet. The opening direction of the tin surface outflow outlet faces the inside of the inner tin pot 11, and the tin surface outflow outlet is lower than the upper edge of the inner tin pot 11.

[0082] A circulation chamber 114 is provided at one end of the circulation channel, and the circulation chamber 114 is communicated with the bottom chamber. The circulation chamber 114 includes an opening for vertically inserting a circulation pump assembly, and the circulation pump continuously injects tin into the circulation channel from the circulation chamber.

[0083] The circulation pump assembly includes an impeller, a transmission shaft 115, and a motor 116; the impeller is mounted on the transmission shaft 115, and the transmission shaft 115 is matched to the motor 116 through a pulley and a transmission belt. The impeller fits in the opening and presses the tin surface in the circulation chamber 114 into the circulation channel.

[0084] When the impeller of the circulation pump assembly operates in the circulation chamber 114, the impeller drives the tin to enter from the circulation channel, and when the tin surface reaches a certain height, the tin flows out from the tin surface flow outlet to the inner tin pot, thereby making the tin surface circulate continuously and ensuring that the tin surface is clean.

[0085] Two tin cups 16 are arranged in the inner tin pot 11. When the tin cups are stationary or lifted, the tin surface is easily oxidized by air. To prevent oxidation, each tin cup is provided with a pipe 161 for introducing nitrogen atmosphere into the tin pot in the axial direction. The bottom of the pipe is connected to an air channel 17, and the air channel 17 is connected to an external air source.

[0086] The upper edge of the tin furnace 1 is an end cover assembly 2, wherein the end cover assembly includes a cover frame 21, a tin furnace cover 22 and a tin cup cover 23; the cover frame 21 is installed on the upper edge of the tin furnace 1, an opening is opened in the middle of the cover frame 21 corresponding to the tin furnace 1, and the tin furnace cover 22 is arranged on the opening.

[0087] The tin furnace cover plate 22 includes: a first orifice 221 opposite to the tin cup mouth, and a second orifice 222 for discharging nitrogen to the outside of the tin furnace 1. The first orifice 221 and the second orifice 222 are connected through a nitrogen flow channel 223 in the bottom surface of the tin furnace cover plate 22. Three nitrogen flow channels 223 are arranged between each group of the first orifice 221 and the second orifice 222, and nitrogen continuously flows to the second orifice 222 through the nitrogen flow channel 223.

[0088] When the tin furnace cover 22 is sealed, after the pipeline in the tin cup 16 continuously introduces nitrogen, the nitrogen can enter the second orifice 222 from the nitrogen flow channel 223, so that the nitrogen can flow and ensure the continuous flow of the protective gas in the tin furnace.

[0089] A tin cup cover plate 23 is covered on the tin furnace cover plate 22, and the tin cup cover plate 23 is covered on the first orifice 221 and opens and closes the first orifice 221 in a sliding manner. A fan-shaped connecting rod 24 is installed on the tin furnace cover plate 22, and one end of the fan-shaped connecting rod 24 is fixed to the surface of the tin furnace cover plate 22 through a hinge shaft. The fan-shaped connecting rod 24 is connected to the tin cup cover plate 23, and the fan-shaped connecting rod 24 drives the tin cup cover plate 23 to swing with the hinge shaft as the rotation center. At the same time, an arc groove 25 for sliding guide of the tin cup cover plate 23 is set on the tin cup cover plate 23, and the fan-shaped connecting rod 24 cooperates with the arc groove 25 through bolts. A through hole is opened on the tin cup cover plate 23, and as the tin cup cover plate 23 slides, the through hole is docked with the first orifice 221 to expose the tin cup 16, thereby controlling the sliding opening and closing of the first orifice 221.

[0090] A nozzle piece 26 is installed on the second opening 222 on the tin furnace cover plate 22. The nozzle piece 26 can be connected to an external exhaust device to extract the internal nitrogen to form a virtuous cycle and ensure the purity of the nitrogen.

[0091] The tin cup lifting mechanism 5 includes: a vertically guided lifting module. The module includes a bracket 51, a vertical guide rod 52, and an electric cylinder assembly 53. The guide rod is matched with a sliding base 54, and a vertically arranged connecting rod is clamped on the base 54. A matching hole is opened on the tin furnace cover plate, and a guide column sleeve 55 is installed in the matching hole. The connecting rod and the guide column sleeve 55 are matched and installed, and the module extends into the tin furnace through the connecting rod.

[0092] The connecting rod lifts the tin cup through the connecting piece 56 to generate vertical displacement. The bottom of the tin cup is fixedly connected to a connecting piece, and a supporting rod extending vertically upward is arranged on the connecting piece.

[0093] Embodiment 3:

[0094] The preheating channel structure 4 is arranged between the flux module and the brazing module. It includes two symmetrically arranged preheating modules, each of which is connected to an air heater 41 and a high-pressure ventilator. The ventilator is connected to the air heater 41 through an air channel, and the air heater 41 is connected to the preheating module.

[0095] The preheating module includes an outer body 43 and a center piece 42. Both the outer body 43 and the center piece 42 are hollow structures, and the center piece 42 is nested in the outer body 43. The center piece 42 serves as a gas flow channel, and the outer body 43 outside the center piece 42 serves as another gas flow channel.

[0096] Specifically, the outer body 43 can be divided into two parts, the upper part and the lower part, that is, the outer ring gas flow channel includes: a hot air flow chamber 431 and a ventilation chamber 432. The upper side is a closed hot air flow chamber 431, and the lower side is a ventilation chamber 432 for circulating air. The hot air flow chamber 431 can continuously supply heated air, and the ventilation chamber 432 can provide cold air flow for condensation. An outer shell plate is arranged outside the hot air flow chamber 431.

[0097] The center piece 42 is in a straight cylindrical shape, so the inner ring gas flow channel includes two upper and lower non-enclosed ports. The upper port of the center piece corresponds to the top hole on the top plate of the hot air flow chamber 431, and the lower port of the center piece 42 corresponds to the lower port of the ventilation chamber 432.

[0098] A flange hole 44 for coaxially assembling the center piece is formed in the hot air flow chamber 431 . The upper port of the center piece 42 is mounted to the flange hole 44 via fasteners. The hot air in the hot air flow chamber 431 continuously heats the workpiece in the upper port of the center piece 42 .

[0099] The upper port of the center piece 42 is buried under the top hole of the hot gas flow chamber 431, and an annular expansion 45 is installed in the upper port of the center piece 42. A sleeve piece 46 for inserting a workpiece is suspended in the annular expansion 45, and the sleeve piece 46 has connecting ribs extending radially to support and suspend it in the upper port of the inner ring gas flow channel.

[0100] The annular expansion opening 45 corresponds to the top hole on the top plate 431 of the hot air flow chamber, and a cover plate 47 is provided between the top plate and the annular expansion opening 45. The cover plate 47 can cover the matching gap, and at the same time, the cover plate 47 overlaps with the flash edge of the sleeve member 46 and the annular expansion opening 45 to form a closed fit to prevent the airflow from overflowing, and the corner of the cover plate 47 forms a downwardly covering arc surface, and the arc surface design can effectively dissipate the wall heat upward.

[0101] The gasket 48 spaced apart between the cover plate 47 and the annular flare 46 is tightly fitted, and the cover plate 47, the gasket 48, and the annular flare 46 are contacted and connected and fastened in sequence. Therefore, the hot air flow can flow into the annular flare 46 and the center piece 42 through the gasket gap between the cover plate 47 and the annular flare 46.

[0102] The hot air flow chamber 431 is connected to an air heater 41 and a ventilator. Meanwhile, a pilot temperature controller is arranged in the hot air flow chamber.

[0103] The ventilation chamber includes: an air inlet regulated by an air intake controller and an air outlet regulated by a throttle valve. The air inlet is a strip-shaped air hole 433 opened on the rotating surface of the outer body, and the air outlet is connected to an external suction device, and the air flow speed is regulated by the throttle valve.

[0104] A detachable collection container 49 is arranged on the lower end of the inner ring gas flow channel. The collection container 49 is a hemispherical container supported at the lower end of the center piece. At the same time, a detachable U-shaped connector is provided at the lower end of the outer body, and the connector is installed on the surface of the outer body by screws. A bolt that is tightened upward is assembled in the bottom screw hole of the connector, and the bolt connects and supports the collection container 49.

[0105] Embodiment 4:

[0106] The soldering flux control mechanism 3 comprises: a sealed storage box 31 for storing the soldering flux and a holding box 32 for temporarily storing the soldering flux.

[0107] The storage box 31 is a rectangular box body welded from PVC sheets, which has good corrosion resistance. An inclined feed port 321 is arranged on the top plate of the storage box 31, a discharge port 322 for discharging soldering flux is arranged at the bottom of the storage box 31, and a self-closing valve is arranged on the connecting pipe of the discharge port 322.

[0108] A universal pump 33 is arranged in the storage box 31, and the universal pump 33 is installed at the bottom of the storage box 31 by fasteners. A main pipe 34 is connected to the universal pump 33, and the main pipe 34 is arranged vertically and passes through the top plate of the storage box 31. In order to control the normal operation of the universal pump 33, a capacitive proximity switch 35 is arranged outside the storage box 31, and the capacitive proximity switch 35 is arranged near one side of the main pipe 34. The capacitive proximity switch 35 senses that the flux continues to flow in the main pipe 34, and the capacitive proximity switch 35 can determine the working state of the universal pump 33 by detecting the dielectric constant of the capacitor.

[0109] A one-way valve is installed on the main line 34 to control the reflux, and the one-way valve 39 is connected to the holding box 32 through a fluororubber hose. At the same time, a flow control valve is arranged in the fluororubber pipeline to control the flow channel.

[0110] Two overflow pipes 36 are also arranged in the storage box 31. The overflow pipes 36 are also arranged vertically and pass through the top plate of the storage box 31. A liquid level sensor 37 is also installed on the storage box 31; the liquid level sensor 37 measures the height of the soldering flux liquid level through a measuring tube vertically inserted into the storage box 31.

[0111] The holding box 32 is arranged on the upper side of the storage box, and the holding box 32 is a rectangular slot-shaped chamber. Orifices for flux overflow are opened on the side walls of the holding box 32, and the orifices are respectively connected to overflow pipes 36. Generally, the overflow height of the orifice is set at 80% of the volume height of the holding box, which can ensure that the workpiece can smoothly dip the flux.

[0112] A placement hole 38 for positioning and inserting the workpiece is arranged in the holding box 32. The placement hole 38 extends upward from the bottom of the holding box. The holding box 32 outside the placement hole is filled with flux supplied from the storage box 31. When the workpiece is inserted into the placement hole 38, it can be dipped in the flux.

[0113] When the soldering flux flows into the holding box through the universal pump 33 and the main pipe 34, the outlet flow is regulated by the self-closing valve. At the same time, the capacitive proximity switch 35 monitors whether the universal pump 33 is operating normally, and the liquid level sensor monitors the liquid level of the soldering flux in the storage box.

[0114] Embodiment 5:

[0115] The automatic tin feeding mechanism 6 includes: a sprocket 62 , a ratchet 63 , a pawl, and a cylinder 65 , which are arranged on a base plate 61 .

[0116] Specifically, the sprocket 62 is assembled on a rotating shaft through a connecting key, and the rotating shaft is mounted on the base plate 61 through a bearing. At the same time, a ratchet is assembled on the rotating shaft, and the ratchet 63 rotates synchronously with the sprocket 62. A chain is sleeved on the sprocket 62, and a tin bar is hung on the lower end of the chain through a claw hook.

[0117] A ratchet pawl is mounted on the seat plate 61 on the upper side of the ratchet 63 and the sprocket 62 via a pivot 66. The pivot 66 is located on the central axis of the sprocket 62, and two hooks of the ratchet pawl are respectively engaged with the tooth surfaces on both sides of the ratchet 63.

[0118] The pawl includes a first hook 67 and a second hook 68, and the first hook 67 and the second hook 68 clamp the tooth surface of the ratchet 63 from both sides of the ratchet 63. A tension spring 64 is provided between the first hook 67 and the second hook 68 to provide a clamping force, and under the action of the tension spring 64, the pawl can always maintain a locked state.

[0119] The first hook 67 is driven by the cylinder 65 and generates an upward pushing force. The first hook 67 rotates around the pivot 66 and pushes the ratchet 63 upward to rotate one tooth. On the other side, the tooth located at the second hook 68 on the ratchet 63 pushes the second hook 68 outward as the ratchet 63 rotates, and flips the position of one tooth downward, thereby realizing the rotation of the ratchet 63.

[0120] Therefore, a continuous plane is included at the end of the second hook 68, and the tooth surface of the ratchet 63 slides downward along the continuous plane and disengages from the second hook 68. At the same time, the front end of the continuous plane can limit the reverse rotation of the ratchet 63.

[0121] A limiting protrusion for limiting the second hook 68 is provided on the seat plate 61 . Since the first hook 67 and the second hook 68 are connected by a tension spring 64 , the second hook 68 is prevented from being disengaged, and the limiting protrusion can abut against the second hook 68 .

[0122] When the cylinder 65 extends, the cylinder 65 drives the first hook 67, the first hook 67 pushes the ratchet 63 upward, the ratchet 63 rotates counterclockwise, the tooth surface of the second hook 68 disengages, and after rotating one tooth counterclockwise, the second hook 68 engages the main tooth surface to limit the position. Therefore, the two hooks are connected up and down to drive the ratchet and sprocket to rotate, so that the tin bar hanging on the sprocket drops to reach the height of automatically replenishing the tin surface.

[0123] The embodiments of the present invention are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A turntable welding device, comprising: A fixture for placing workpieces and a brazing module for driving the fixture to rise, fall and rotate are characterized by: A tin furnace, comprising an inner tin pot, an outer tin pot, a tin furnace cover plate, and a tin cup cover plate; The surface layout of the outer tin pot includes: a heating block layer, a heating block pressing plate layer, and a heat insulation board layer; The inner tin pot includes a tin cup and a circulation channel; the tin cup includes a pipeline for introducing a nitrogen atmosphere into the tin pot; the circulation channel includes a tin surface outflow port opened toward the inner direction of the inner tin pot; the circulation channel is connected to a circulation cavity; the impeller of a circulation pump is inserted in the circulation cavity; The tin furnace cover plate comprises: a first orifice opposite to the tin cup opening, and a second orifice for discharging nitrogen out of the tin furnace; the first orifice and the second orifice are connected through a nitrogen flow channel in the bottom surface of the tin furnace cover plate; the tin cup cover plate is covered on the first orifice and opens and closes the first orifice in a sliding manner; the tin cup cover plate slides through a connecting rod with a rotation point; The preheating module comprises: two axially stacked gas flow channels assembled together; the outer ring gas flow channel comprises independent: hot air flow chamber and ventilation chamber; the upper port of the inner ring gas flow channel comprises a sleeve member for inserting and placing workpieces; the hot air flow chamber is connected to an air heater and a ventilator; the ventilation chamber comprises: an air inlet regulated by an air intake controller and an air outlet regulated by a throttle valve; a detachable collection container is arranged on the lower port of the inner ring gas flow channel; The automatic tin feeding mechanism comprises a synchronously rotating sprocket and a ratchet; a ratchet on the ratchet that cooperates with a double-claw hook; a tension spring between the two claw hooks; a tin bar is suspended on the sprocket through a chain; The flux control structure comprises a closed storage box for holding the flux, a holding box for temporarily holding the flux is arranged on the upper side of the storage box; a pressure pump is arranged in the storage box; the pressure pump supplies the flux by connecting to the main pipeline in the holding box.

2. A turntable welding device according to claim 1, characterized in that: A cover plate for covering the fitting gap is arranged between the top plate of the hot air flow chamber and the upper port of the inner ring gas flow channel; the cover plate and the sleeve member overlap to form a closed fit to prevent airflow from overflowing, and the corner of the cover plate forms an arc surface covering downward.

3. The turntable welding equipment according to claim 1, characterized in that: The preheating module includes a center piece stacked in an outer body; the outer body of the outer ring and the center piece of the inner ring can both form the gas flow channel; the hot air flow chamber includes a flange opening for coaxially assembling the center piece.

4. The turntable welding equipment according to claim 1, characterized in that: A pilot temperature controller is arranged in the hot air flow chamber.

5. The turntable welding equipment according to claim 1, characterized in that: A tin cup lifting mechanism on one side of the tin furnace; The tin cup lifting mechanism comprises: a module for vertically guiding lifting; The module extends into the tin furnace through a connecting rod; the connecting rod lifts the tin cup through a connecting piece to produce vertical displacement; the module includes a bracket, a vertical guide rod, and an electric cylinder assembly; the guide rod is equipped with a sliding base; the base is clamped with the vertically arranged connecting rod.

6. The turntable welding equipment according to claim 1, characterized in that: A liquid level sensor is also installed on the storage box; the liquid level sensor is connected to a measuring tube, and the measuring tube extends into the storage box; a proximity switch is also arranged outside the storage box; the proximity switch is arranged close to one side of the main pipeline.

7. The turntable welding equipment according to claim 1, characterized in that: The pawl includes a first hook and a second hook; the first hook is installed on the upper side of the ratchet through a pivot; the first hook rotates around the pivot and pushes the ratchet to rotate one tooth upward; the end of the second hook includes a continuous plane; the tooth surface of the ratchet slides downward along the continuous plane and disengages from the second hook; the second hook limits the reverse rotation of the ratchet.

8. The turntable welding equipment according to claim 1, characterized in that: A temperature sensor is installed on the inner side of the corner of the outer tin pot.

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