CN212286202U - Automatic vacuum reflow soldering equipment adopting contact type temperature control - Google Patents
Automatic vacuum reflow soldering equipment adopting contact type temperature control Download PDFInfo
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- CN212286202U CN212286202U CN202021317944.9U CN202021317944U CN212286202U CN 212286202 U CN212286202 U CN 212286202U CN 202021317944 U CN202021317944 U CN 202021317944U CN 212286202 U CN212286202 U CN 212286202U
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Abstract
The utility model relates to an adopt automatic vacuum reflow soldering equipment of contact accuse temperature, belong to vacuum reflow soldering technical field, including the heating chamber, the chamber lid, infrared radiant tube, the hot plate, contact accuse temperature mechanism, evacuation mechanism and cooling body, chamber lid one end is articulated to be installed on the heating chamber, the other end is through automatic hook locking device and heating chamber demountable seal installation that opens and shuts, establish the heating chamber in the heating chamber, install a plurality of infrared radiant tube in the heating chamber, contact accuse temperature mechanism includes main thermocouple and mobile thermocouple, main thermocouple installs in the heating chamber and with hot plate bottom contact installation, mobile thermocouple installs on the chamber lid and with hot plate upper surface contact installation, main thermocouple and mobile thermocouple all are connected with PID heating controller electricity, heating efficiency for solving vacuum reflow soldering equipment existence is low, the heating is inhomogeneous, the heating, The low heating temperature causes the product to have poor welding quality, and the cavity cover is too heavy and inconvenient to operate.
Description
Technical Field
The utility model relates to an adopt automatic vacuum reflow soldering equipment of contact accuse temperature belongs to vacuum reflow soldering technical field.
Background
Under the rapid development environment of modern integrated circuits and electronic technologies, semiconductor products are more and more widely applied, and with the improvement of the fine requirements on the quality of semiconductor products, especially semiconductor metal packaging devices and semiconductor ceramic packaging devices, the traditional reflow soldering process, the soldering quality and the void ratio can not meet the quality requirements of the semiconductor products.
At present, the traditional vacuum reflow oven heats the circuit board by utilizing the hot air generated by filaments in the heating box and the hot air circulation mode, the heating tube heats the air of the heating box in the heating box, and then the fan conveys the hot air into the oven cavity of the reflow oven. In order to make the air outlet of the heating box uniform, the air outlet of the heating box is provided with a metal rectifying plate, and the rectifying plate is provided with a plurality of uniformly distributed small holes for guiding the hot air. The welding process of the circuit board on the conveying belt is that the circuit board heats the solder paste on the circuit board under the action of hot air, the soldering flux promotes the solder paste to melt, and finally the temperature of the circuit board is reduced under the action of the cooling fan, the solder paste is solidified, and the welding process is completed. In the welding mode of hot air heating, the heating of the circuit board is transferred and heated from the surface to the inner surface, so that the tin paste on the circuit board is easy to generate bubbles in the heating process, the phenomenon of false soldering due to cold soldering occurs in the welding process, the product quality is seriously influenced, and according to incomplete statistics, the defective products generated in the mode of bubbles account for about 50 percent of all the defective products. Secondly, because the efficiency of heat transfer by hot air is low, especially the heat absorption capacity of the flexible circuit board provided with the tool fixture is very large, the circuit board is not heated sufficiently due to the low-efficiency heating mode, the local temperature is higher, and the like, so that poor welding phenomena such as circuit board deformation and the like occur, and the product quality is seriously influenced; thirdly, the rectifying plate does not generate heat, the surface temperature does not reach the gasification temperature required by the soldering flux, so that the soldering flux is easy to adhere and condense on the rectifying plate, and the maintenance and the cleaning are quite difficult. On the other hand, the cavity door of the vacuum reflow oven has a complex structure, the weight is more than 20KG, and if the vacuum reflow oven is manually opened and closed, a common female operator is difficult to independently complete, and automatic integration cannot be realized. Most of the temperature control modes of the vacuum reflow oven adopt the integration of temperature sensing element inserted temperature control and heating plate, and the heating plate is inconvenient to disassemble and customize.
In summary, the existing vacuum reflow soldering apparatus has several problems: 1. the hot air reflow furnace is used as a heating device, so that the problems of poor welding such as cold solder and circuit board deformation caused by poor welding due to the fact that the heating speed is low, the highest heating temperature is low, and the circuit board is heated unevenly to generate bubbles in solder paste; 2. the surface temperature of the rectifying plate is low, so that the adhesion and condensation of soldering flux are easily caused, and the maintenance and cleaning are difficult; 3. the infrared welding technology adopted in the prior art has the problems that although the heat source is convenient to control, the photosensitive points are shielded, the heating effect is influenced by the different qualities of elements and PCBs, the temperature difference is large and the like; 4. the screw thread of the cavity cover is easy to cause secondary pollution after long-term use, the granularity is reduced, and the common screw-thread door lock device is made of thin material, is easy to deform due to external impact and cannot be used, and has poor durability; 5. in the prior art, the temperature control mode adopts a heating plate insertion type, and the disassembly is inconvenient.
SUMMERY OF THE UTILITY MODEL
The utility model discloses not enough to prior art exists, provide an adopt automatic vacuum backflow welding equipment of contact accuse temperature for the heating efficiency who solves the vacuum backflow welding equipment existence among the prior art is low, the heating is inhomogeneous, the low product welding quality who causes of heating temperature is poor, and the technical problem of the too heavy inconvenient operation of chamber lid.
The utility model provides an above-mentioned technical problem's technical scheme as follows: an automatic vacuum reflow soldering device adopting contact temperature control comprises a heating chamber, a chamber cover forming a sealed chamber with the heating chamber, a plurality of infrared radiant tubes arranged in the heating chamber, a heating plate positioned above the infrared radiant tubes, a contact temperature control mechanism, a vacuumizing mechanism communicated with the heating chamber and a cooling mechanism, wherein one end of the chamber cover is hinged on the heating chamber, the other end of the chamber cover is detachably and hermetically arranged with the heating chamber through an automatic opening and closing hook locking device, the heating chamber is arranged in the heating chamber, the heating chamber is internally provided with a plurality of infrared radiant tubes, the heating chamber is internally provided with a supporting mechanism for placing the heating plate, the contact temperature control mechanism comprises a main thermocouple and a movable thermocouple, the main thermocouple is arranged in the heating chamber and is in contact installation with the bottom of the heating plate, the movable thermocouple is arranged on the chamber cover and is in contact installation with, the main thermocouple and the movable thermocouple are electrically connected with the PID heating controller through data lines.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, the movable thermocouple adopts a platinum rhodium wire with the diameter of 0.5mm and the length of 300mm, and the tail end of the platinum rhodium wire is a detection point.
Furthermore, the both ends of infrared radiant tube are fixed through the fluorescent tube seal block after passing the heating chamber lateral wall, infrared radiant tube is equidistant to be set up.
Further, the cavity cover is of a cuboid structure without a bottom surface, an observation hole is formed in the cavity cover, and quartz glass is installed on the observation hole.
Further, the hot plate bottom surface contacts with the bracket of installing on the inside bottom surface of heating chamber, four inside angle settings of heating chamber are used for the bearing seat at four angles of bearing hot plate, aluminum plate, silicon nitride board or graphite plate are adopted to the material of hot plate, the hot plate surface scribbles optical coating.
Further, a vacuumizing outlet is arranged in the center of the bottom of the heating chamber and is communicated with a vacuumizing mechanism through a pipeline.
Further, the cooling mechanism comprises a water cooling mechanism arranged on the bottom surface outside the heating chamber and an air cooling mechanism communicated with the heating chamber of the heating chamber.
Further, the water cooling mechanism comprises a water cooling plate arranged on the bottom surface of the outer part of the heating chamber, and the water cooling plate is provided with a cold water inlet and a warm water outlet.
Further, the air cooling mechanism comprises a plurality of cooling gas nozzles installed on the side wall of the heating chamber, the cooling gas nozzles are penetratingly installed on the side wall of the heating chamber through vacuum penetrating sealing pieces, and the cooling gas nozzles are communicated with the nitrogen storage tank.
Further, the side wall of the heating chamber is also provided with a reducing gas nozzle, the reducing gas nozzle is penetratingly arranged on the side wall of the heating chamber through a vacuum penetrating sealing piece, and the reducing gas nozzle is communicated with the formic acid storage tank.
Furthermore, the two side surfaces of the rear part of the cavity cover are provided with an upper overturning connecting rod, the two side surfaces of the rear part of the heating chamber are provided with a lower overturning connecting rod, and the upper overturning connecting rod and the lower overturning connecting rod are rotatably arranged through a rotating shaft to realize the hinged installation of the cavity cover and the heating chamber.
Further, the automatic opening and closing hook lock device comprises a cylinder connecting rod, an uncovering cylinder, two upper lock seats arranged at two ends of the front side surface of the cavity cover, a first linkage shaft rotatably arranged at the front side surface of the heating chamber and two rotating rings fixedly arranged at two ends of the first linkage shaft respectively, one end of the cylinder connecting rod is rotatably arranged with one end of the upper turnover connecting rod, the other end of the cylinder connecting rod is fixedly arranged with a cylinder rod of the uncapping cylinder, the tail part of the uncovering cylinder is hinged on a cylinder tail part support, the cylinder tail part support and the heating chamber are both fixedly arranged on the upper surface of the mounting bottom plate, the bottom of the upper lock seat is provided with a U-shaped opening, a rotating shaft is arranged on the U-shaped opening, one end of the rotating ring is hook-shaped, the other end of the rotating ring is rotatably arranged with a cylinder rod of the locking cylinder, the lower surface of the mounting bottom plate is further provided with a cylinder tail support, and the tail of the locking cylinder is hinged to the cylinder tail support on the lower surface of the mounting bottom plate.
Furthermore, the locking cylinders comprise two locking cylinders, the cylinder rods of the two locking cylinders are respectively and rotatably installed at the end parts of the two rotating rings, and the second coupling shaft is rotatably installed between the two rotating rings.
Furthermore, the automatic opening and closing hook lock device further comprises a damping mechanism, the damping mechanism comprises a tension spring, one end of the tension spring is fixedly installed at one end, far away from the upper turning connecting rod, of the cavity cover, and the other end of the tension spring is adjustably installed on the installation bottom plate.
Further, the end of the tension spring is mounted on an L-shaped spring seat through an eyebolt, and the bottom of the spring seat is mounted in a strip hole in the mounting base plate through a screw.
Further, a damper is further installed between the upper overturning connecting rod and the lower overturning connecting rod.
Further, still include the protection casing, the protection casing adopts L type panel beating, the protection casing upper surface flushes with the heating chamber upper surface, the protection casing bottom is fixed on mounting plate, the protection casing will be except that the seat of locking and the automatic hook locking device that opens and shuts that is located the mounting plate top covers in inside, the protection casing top still sets up the U type opening male rectangle opening that supplies to lock the seat.
Further, the upper surface of the heating chamber is provided with a convex sealing strip, and the sealing strip is an O-shaped sealing ring.
Furthermore, a safe temperature sensor is further installed at the bottom of the heating chamber, and the temperature in the heating chamber is monitored.
The utility model has the advantages that: the heating device comprises an infrared radiation tube, a heating plate, a main thermocouple, a movable thermocouple, a PID heating controller, a vacuum reflow soldering device, a tool fixture, a heating chamber, a PID heating controller and a control system, wherein the infrared radiation tube and the heating plate above the infrared radiation tube are used for infrared radiation non-contact heating, so that heat energy is quickly provided for the heating chamber, the heating speed is high, the heating temperature is high, the main thermocouple is used for detecting the temperature state of the surface of the heating plate, the movable thermocouple is used for detecting the temperature of an element or the tool fixture subjected to vacuum reflow soldering, the temperature data collected by the main thermocouple and the movable thermocouple is processed by the PID heating controller and fed back to the infrared radiation tube, the; by adopting the movable thermocouple, the temperature of the workpiece on the heating plate can be conveniently detected, and the movable thermocouple is convenient, quick, time-saving and labor-saving; the infrared radiation tubes arranged at equal intervals are adopted, so that the heating uniformity is further improved; by arranging the bottom-surface-free cubic structure of the cavity cover and arranging the observation hole made of quartz glass material, the space utilization rate is improved, the welding working condition is convenient to observe, and the device is time-saving, labor-saving, convenient and quick; the heating plate is convenient to place and can be prevented from deforming by arranging the bracket and the bearing seat, contact type temperature control is realized, the heating plate is convenient and quick to take and place, a thermocouple is not required to be plugged and pulled when the electric heating plate is replaced, the cleaning and the maintenance are convenient, time and labor are saved, the heating plate made of aluminum plates, silicon nitride or graphite plates and the optical coating are arranged, the highest heating temperature can be favorably promoted to reach 200 ℃/min, and the heating uniformity of the heating plate is better than +/-1%; by arranging the water cooling mechanism and the air cooling mechanism, the water cooling plate is favorable for cooling the temperature at the bottom of the heating chamber, nitrogen is sprayed to quickly cool elements on the heating plate in the heating cavity of the heating chamber, the highest cooling rate reaches 100 ℃/min, and the cooling speed is high, so that the welding efficiency is improved; formic acid is arranged for reduction, and elements oxidized due to high temperature are reduced, so that the welding quality of the elements is ensured; the automatic opening and closing hook lock device is arranged to realize automatic opening and closing of the cavity cover, so that the traditional thread lock is solved, time and labor are saved, the automation is favorable for independent operation of female operators, and the labor intensity is reduced; the protection cover is arranged to protect the parts around the heating chamber, so that the dustproof and waterproof effects are achieved, and the service life of the equipment is prolonged.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of the overall structure of the present invention;
FIG. 3 is a front view of the present invention;
fig. 4 is a right side view of the present invention;
fig. 5 is a left side view of the present invention;
fig. 6 is a top view of the present invention;
fig. 7 is a schematic view of the opening of the chamber cover of the present invention;
FIG. 8 is a schematic view of the heating chamber;
fig. 9 is a schematic top view of the heating chamber.
In the figure, 1, an observation hole, 2, a cavity cover, 3, an upper turnover connecting rod, 4, a damper, 5, a cylinder connecting rod, 6, a lower turnover connecting rod, 7, an uncovering cylinder, 8, a cylinder tail support, 9, a rotating ring, 10, an upper locking seat, 11, a heating chamber, 12, a first linkage shaft, 13, a bearing seat, 14, a tension spring, 15, an eye bolt, 16, a spring seat, 17, a mounting base plate, 18, a locking cylinder, 19, a second linkage shaft, 21, a lamp tube sealing block, 22, a protective cover, 23, a heating plate, 24, a sealing strip, 25, an upper surface of the heating chamber, 26, a rectangular opening, 27, an infrared radiation tube, 28, a main thermocouple, 29, a bearing seat, 30, a cooling gas nozzle, 31, a safety temperature sensor, 32, a vacuumizing outlet, 33, a bracket and 34 are provided with a reducing gas nozzle.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
Referring to the attached drawings 1-6, an automatic vacuum reflow soldering device adopting contact temperature control comprises a heating chamber 11, a chamber cover 2 forming a sealed chamber with the heating chamber 11, a plurality of infrared radiation tubes 27 arranged inside the heating chamber 11, a heating plate 23 positioned above the infrared radiation tubes 27, a contact temperature control mechanism, a vacuumizing mechanism communicated with the heating chamber 11 and a cooling mechanism, wherein the heating chamber 11 and the chamber cover 2 are both made of quartz glass materials, one end of the chamber cover 2 is hinged on the heating chamber 11, and the other end of the chamber cover 2 is detachably and hermetically arranged with the heating chamber 11 through an automatic opening and closing hook locking device and used for isolating the inside and outside air, so that the vacuum state in the heating chamber 11 is not influenced; referring to fig. 7-9, a protruding sealing strip 24 is mounted on the upper surface of the heating chamber 11, and the sealing strip 24 is an O-ring. A heating cavity is arranged in the heating chamber 11, a plurality of infrared radiation tubes 27 are arranged in the heating cavity and used for providing heat energy for infrared radiation non-contact heating, each infrared radiation tube 27 has the power of 750-; the heating chamber is internally provided with a bearing mechanism for placing the heating plate 23, the contact type temperature control mechanism comprises a main thermocouple 28 and a movable thermocouple, the main thermocouple 28 is arranged in the heating chamber and is in contact installation with the bottom of the heating plate 23, the movable thermocouple is arranged on the chamber cover 2 and is in contact installation with the upper surface of the heating plate 23, the heating chamber also comprises a PID (proportion-differentiation-integration) heating controller, the main thermocouple 28 and the movable thermocouple are both electrically connected with the PID heating controller through data lines, infrared radiation non-contact heating is carried out by adopting an infrared radiation tube 27 and the heating plate 23 positioned above the infrared radiation tube 27, heat energy is rapidly provided for the heating chamber 11, the heating speed is high, the heating temperature is high, the main thermocouple 28 is used for detecting the temperature state of the surface of the heating plate 23, and the movable thermocouple is used for detecting the temperature of an element or a tool clamp which is subjected to vacuum reflow soldering, the PID heating controller is used for processing the temperature data collected by the main thermocouple 28 and the mobile thermocouple and feeding the temperature data back to the infrared radiant tube 27, so that the temperature rise rate of each region of the heating plate 23 in the heating chamber 11 is controlled, the heating uniformity and the heating efficiency are improved, and the welding quality of the product is ensured.
The movable thermocouple adopts a platinum rhodium wire with the diameter of 0.5mm and the length of 300mm, the bending shape and the bending angle can be adjusted according to requirements, the tail end of the platinum rhodium wire is a detection point, and the movable thermocouple is adopted, so that the temperature of a workpiece on the heating plate 23 can be detected conveniently, and the movable thermocouple is convenient, quick, time-saving and labor-saving.
Two ends of the infrared radiation tubes 27 penetrate through the side wall of the heating chamber 11 and then are fixed through the lamp tube sealing blocks 21, and the infrared radiation tubes 27 are arranged at equal intervals; by using the infrared radiation tubes 27 arranged at equal intervals, the uniformity of heating is further improved.
The cavity cover 2 is of a cuboid structure without a bottom surface, an observation hole 1 is formed in the cavity cover 2, the observation hole 1 is circular, square or in other shapes, and high-temperature-resistant quartz glass is installed on the observation hole 1; through setting up the no bottom surface cube structure of chamber lid 2 and setting up observation hole 1 of quartz glass material, improve space utilization and be convenient for observe the welding condition, labour saving and time saving, convenient and fast.
Referring to fig. 8-9, the bottom surface of the heating plate 23 is in contact with a bracket 33 mounted on the bottom surface of the inside of the heating chamber 11, four corners of the inside of the heating chamber 11 are provided with supporting seats 29 for supporting four corners of the heating plate, the heating plate 23 is made of an aluminum plate, a silicon nitride plate or a graphite plate, and the surface of the heating plate 23 is coated with an optical coating; through setting up bracket 33 and bearing seat 29, be convenient for place hot plate 23 and can prevent that hot plate 23 from warping, hot plate 23 is got and is put convenient and fast, is convenient for wash the maintenance, and labour saving and time saving is favorable to making the highest heating temperature reach 200 ℃/min through hot plate 23 and the optical coating who sets up aluminum plate, silicon nitride or graphite plate material, and the heating homogeneity of hot plate 23 is superior to 1%.
The center of the bottom of the heating chamber 11 is provided with a vacuum outlet 32, and the vacuum outlet 32 is communicated with a vacuum pumping mechanism through a pipeline.
The cooling mechanism comprises a water cooling mechanism arranged on the bottom surface of the outside of the heating chamber 11 and a gas cooling mechanism communicated with the heating chamber of the heating chamber 11, the water cooling mechanism comprises a water cooling plate arranged on the bottom surface of the outside of the heating chamber 11, the water cooling plate is provided with a cold water inlet and a warm water outlet, the gas cooling mechanism comprises a plurality of cooling gas nozzles 30 arranged on the side wall of the heating chamber 11, the cooling gas nozzles 30 are penetratively arranged on the side wall of the heating chamber 11 through vacuum penetrating sealing pieces, the vacuum penetrating sealing pieces are used for preventing vacuum conduction in the heating chamber 11 from being short-circuited with a metal shell of the equipment, the vacuum pressure of the vacuum penetrating sealing pieces is 500Pa-5Pa, the bearing temperature is 400-700 ℃, and; the cooling gas nozzle 30 is communicated with a nitrogen storage tank; by arranging the water cooling mechanism and the air cooling mechanism, the water cooling plate is favorable for cooling the temperature at the bottom of the heating chamber 11, the nitrogen is sprayed to quickly cool elements on the heating plate 23 in the heating cavity of the heating chamber 11, the highest cooling rate reaches 100 ℃/min, and the cooling speed is high, so that the welding efficiency is improved.
The side wall of the heating chamber 11 is also provided with a reducing gas nozzle 34, the reducing gas nozzle 34 is penetratingly arranged on the side wall of the heating chamber 11 through a vacuum penetrating seal, and the reducing gas nozzle 34 is communicated with a formic acid storage tank; formic acid is arranged for reduction, and elements oxidized due to high temperature are reduced, so that the welding quality of the elements is guaranteed.
The two side faces of the rear part of the cavity cover 2 are provided with the upper turnover connecting rods 3, the two side faces of the rear part of the heating chamber 11 are provided with the lower turnover connecting rods 6, and the upper turnover connecting rods 3 and the lower turnover connecting rods 6 are rotatably arranged through rotating shafts to realize the hinged installation of the cavity cover 2 and the heating chamber 11.
Referring to the attached drawings 3-6, the automatic opening and closing hook lock device comprises a cylinder connecting rod 5, an uncovering cylinder 7, two upper locking seats 10 arranged at two ends of the front side surface of a cavity cover 2, a first linkage shaft 12 rotatably arranged at the front side surface of a heating chamber 11 and two rotating rings 9 fixedly arranged at two ends of the first linkage shaft 12 respectively, one end of the cylinder connecting rod 5 is rotatably arranged with one end of an upper overturning linkage rod 3, the other end of the cylinder connecting rod 5 is fixedly arranged with a cylinder rod of the uncovering cylinder 7, the tail part of the uncovering cylinder 7 is hinged and arranged on a cylinder tail support 8, the cylinder tail support 8 and the heating chamber 11 are both fixedly arranged on the upper surface of a mounting bottom plate 17, a U-shaped opening is arranged at the bottom of the upper locking seat 10, a rotating shaft is arranged on the U-shaped opening, one end of the rotating ring 9 is arranged in a hook shape, the lower surface of the mounting bottom plate 17 is also provided with a cylinder tail support 8, and the tail part of the locking cylinder 18 is hinged on the cylinder tail support 8 on the lower surface of the mounting bottom plate 17; the locking cylinders 18 comprise two locking cylinders, cylinder rods of the two locking cylinders 18 are respectively and rotatably mounted with the ends of the two rotating rings 9, and a second coupling shaft 19 is rotatably mounted between the two rotating rings 9; the automatic opening and closing hook lock device further comprises a damping mechanism, the damping mechanism comprises a tension spring 14, one end of the tension spring 14 is fixedly installed with one end, far away from the upper turning connecting rod 3, of the tension spring 14 and fixed on the cavity cover 2, and the other end of the tension spring 14 is adjustably installed on an installation bottom plate 17; the end part of the tension spring 14 is installed on an L-shaped spring seat 16 through an eyebolt 15, and the bottom of the spring seat 16 is installed in a long strip hole on an installation bottom plate 17 through a screw; a damper 4 is also arranged between the upper overturning connecting rod 3 and the lower overturning connecting rod 6; still include protection casing 22, protection casing 22 adopts L type panel beating, protection casing 22 upper surface flushes with heating chamber 11 upper surface, protection casing 22 bottom is fixed on mounting plate 17, protection casing 2 will be except that the automatic hook locking device that opens and shuts that locks the seat 10 outside and be located mounting plate 17 top covers in inside, protection casing 22 top still sets up the U type opening male rectangle opening that supplies to lock seat 10. The automatic opening and closing hook lock device is arranged, so that the traditional thread lock is solved, time and labor are saved, the automation is favorable for independent operation of female operators, and the labor intensity is reduced, wherein the cavity cover 2 is driven to rotate to open and close by arranging the cover opening cylinder 7, the rotating ring 9 is driven to rotate by arranging the locking cylinder 18 to be buckled with the upper lock seat 10 on the cavity cover 2 so as to lock the cavity cover 2 and the heating chamber 11, the maximum opening and closing angle of the cavity cover 2 is controlled by arranging the tension spring 14, and the opening force of the cavity cover 2 is buffered by arranging the damper 4; the protection cover 22 is arranged to protect the components around the heating chamber 11, so that the dust and water are prevented, and the service life of the equipment is prolonged.
And a safety temperature sensor 31 is also arranged at the bottom of the heating chamber 11 to monitor the temperature in the heating chamber.
The working principle is as follows: when the device is used for carrying out vacuum reflow soldering operation on a workpiece, firstly, after the workpiece is placed on a heating plate, a manipulator operates to place the heating plate 23 on a bearing seat 29, an uncapping cylinder 7 acts, a cylinder rod extends out to close a cavity cover 2, a locking cylinder 18 acts, the cylinder rod extends out to enable a rotating ring 9 to rotate and be buckled with a locking seat 10, a vacuumizing mechanism operates to vacuumize the inside of a heating chamber 11, then an infrared radiation pipe 27 works to rapidly heat and raise the temperature of the air in the heating chamber 11, the temperature of the heating plate 23 is raised accordingly, the temperature of an element on the heating plate 23 is consistent with that of the heating plate 23, tin paste is heated and melted, a main thermocouple 28 and a movable thermocouple respectively detect the temperatures of the heating plate 23 and the element and feed back signals to a PID heating controller, after the temperature reaches a system set value for a period of time, the tin paste is, the cooling gas nozzle 30 is filled with nitrogen gas for cooling, meanwhile, the water cooling plate at the bottom of the heating chamber 11 is filled with cooling water for cooling, the reducing gas nozzle 34 is filled with formic acid after cooling to reduce the gas in the heating chamber 11, then the locking cylinder 18 acts, the cylinder rod retracts, the rotating ring 9 is driven to rotate and separate from the upper locking seat 10, the cover opening cylinder 7 acts, the cylinder rod retracts, the driving cavity cover 2 is opened, and the heating plate 23 and elements can be taken out.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The utility model provides an adopt automatic vacuum reflow soldering equipment of contact accuse temperature which characterized in that: comprises a heating chamber, a chamber cover forming a sealed chamber with the heating chamber, a plurality of infrared radiation tubes arranged in the heating chamber, a heating plate positioned above the infrared radiation tubes, a contact temperature control mechanism, a vacuumizing mechanism and a cooling mechanism which are communicated with the heating chamber, one end of the cavity cover is hinged on the heating chamber, the other end is detachably and hermetically arranged with the heating chamber through an automatic opening and closing hook lock device, a heating chamber is arranged in the heating chamber, a plurality of infrared radiation tubes are arranged in the heating chamber, a supporting mechanism for placing a heating plate is arranged in the heating chamber, the contact type temperature control mechanism comprises a main thermocouple and a movable thermocouple, the main thermocouple is arranged in the heating cavity and is in contact with the bottom of the heating plate, the movable thermocouple is arranged on the cavity cover and is in contact with the upper surface of the heating plate, and the movable thermocouple also comprises a PID heating controller, the main thermocouple and the movable thermocouple are electrically connected with the PID heating controller through data lines.
2. The automatic vacuum reflow soldering apparatus with contact temperature control as claimed in claim 1, wherein: the movable thermocouple adopts a platinum rhodium wire with the diameter of 0.5mm and the length of 300mm, and the tail end of the platinum rhodium wire is a detection point.
3. The automatic vacuum reflow soldering apparatus with contact temperature control as claimed in claim 1, wherein: the both ends of infrared radiant tube are fixed through fluorescent tube seal block after passing the heating chamber lateral wall, infrared radiant tube equidistant setting, the chamber lid adopts the cube structure of no bottom surface, set up the observation hole on the chamber lid, install quartz glass on the observation hole.
4. The automatic vacuum reflow soldering apparatus with contact temperature control according to any one of claims 1 to 3, wherein: the hot plate bottom surface contacts with the bracket of installing on the inside bottom surface of heating chamber, four inside angle settings of heating chamber are used for the bearing seat at four angles of bearing hot plate, the material of hot plate adopts aluminum plate, silicon nitride board or graphite plate, the hot plate surface scribbles optical coating, heating chamber bottom center department sets up the evacuation export, the evacuation export passes through pipeline and evacuation mechanism intercommunication.
5. The automatic vacuum reflow soldering apparatus with contact temperature control as claimed in claim 4, wherein: the cooling mechanism is including installing the water-cooling mechanism at the outside bottom surface of heating chamber and the air-cooling mechanism with the heating chamber intercommunication of heating chamber, the water-cooling mechanism is including installing the water-cooling board at the outside bottom surface of heating chamber, the water-cooling board sets up cold water inlet and warm water export, the air-cooling mechanism includes that a plurality of installs the cooling gas nozzle on the heating chamber lateral wall, the cooling gas nozzle passes through vacuum break-through sealing member and pierces through and install on the heating chamber lateral wall, the cooling gas nozzle communicates with the nitrogen gas storage tank.
6. The automatic vacuum reflow soldering apparatus with contact temperature control as claimed in claim 5, wherein: the side wall of the heating chamber is also provided with a reducing gas nozzle, the reducing gas nozzle is penetratingly arranged on the side wall of the heating chamber through a vacuum penetrating sealing piece, and the reducing gas nozzle is communicated with the formic acid storage tank.
7. The automatic vacuum reflow soldering apparatus with contact temperature control as claimed in claim 1, wherein: the cavity cover is hinged to the heating chamber through the rotating shaft, the upper overturning connecting rod and the lower overturning connecting rod are installed on the two side faces of the rear portion of the cavity cover, and the lower overturning connecting rod is installed on the two side faces of the rear portion of the heating chamber.
8. The automatic vacuum reflow soldering apparatus with contact temperature control as claimed in claim 7, wherein: the automatic opening and closing hook lock device comprises a cylinder connecting rod, an uncovering cylinder, two upper lock seats, a first linkage shaft and two rotating rings, wherein the two upper lock seats are installed at two ends of the front side surface of a cavity cover, the first linkage shaft is rotatably installed at the front side surface of a heating chamber, the two rotating rings are respectively and fixedly installed at two ends of the first linkage shaft, one end of the cylinder connecting rod is rotatably installed with one end of an upper overturning connecting rod, the other end of the cylinder connecting rod is fixedly installed with a cylinder rod of the uncovering cylinder, the tail part of the uncovering cylinder is hinged and installed on a cylinder tail part support seat, the cylinder tail part support seat and the heating chamber are both fixedly installed on the upper surface of an installation bottom plate, a U-shaped opening is arranged at the bottom of the upper lock seat, a rotating shaft is installed on the U-shaped opening, one end of the rotating ring is hook-shaped, the other end, the locking cylinders comprise two locking cylinders, cylinder rods of the two locking cylinders are respectively rotatably mounted with the end parts of the two rotating rings, and a second coupling shaft is rotatably mounted between the two rotating rings.
9. The automatic vacuum reflow soldering apparatus with contact temperature control as claimed in claim 8, wherein: the automatic opening and closing hook lock device further comprises a damping mechanism, the damping mechanism comprises a tension spring, one end of the tension spring is fixedly mounted at one end of the cavity cover with the upper overturning connecting rod, the other end of the tension spring is adjustably mounted on the mounting bottom plate, the end part of the tension spring is mounted on the spring seat of the L type through an eye bolt, the bottom of the spring seat is mounted in a long strip hole on the mounting bottom plate through a screw, and a damper is further mounted between the upper overturning connecting rod and the lower overturning connecting rod.
10. The automatic vacuum reflow soldering apparatus with contact temperature control as claimed in claim 9, wherein: still include the protection casing, the protection casing adopts L type panel beating, the protection casing upper surface flushes with the heating chamber upper surface, the protection casing bottom is fixed on mounting plate, the protection casing will be except that the seat of locking and the automatic hook locking device that opens and shuts that is located the mounting plate top covers in inside, the protection casing top still sets up the U type opening male rectangle opening that supplies the seat of locking, the convex sealing strip of heating chamber upper surface mounting, the sealing strip adopts O type sealing washer, safe temperature sensor is still installed to the heating chamber bottom, monitors the temperature in the heating chamber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021317944.9U CN212286202U (en) | 2020-07-07 | 2020-07-07 | Automatic vacuum reflow soldering equipment adopting contact type temperature control |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113172292A (en) * | 2021-04-22 | 2021-07-27 | 吴俊东 | Vacuum reflow furnace with overpressure exhaust mechanism |
| CN113560691A (en) * | 2021-08-11 | 2021-10-29 | 西北电子装备技术研究所(中国电子科技集团公司第二研究所) | Eutectic furnace control method capable of effectively improving uniformity of eutectic temperature in furnace |
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2020
- 2020-07-07 CN CN202021317944.9U patent/CN212286202U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113172292A (en) * | 2021-04-22 | 2021-07-27 | 吴俊东 | Vacuum reflow furnace with overpressure exhaust mechanism |
| CN113172292B (en) * | 2021-04-22 | 2024-04-23 | 吴俊东 | Vacuum reflow oven with overpressure exhaust mechanism |
| CN113560691A (en) * | 2021-08-11 | 2021-10-29 | 西北电子装备技术研究所(中国电子科技集团公司第二研究所) | Eutectic furnace control method capable of effectively improving uniformity of eutectic temperature in furnace |
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