Hsa Series Low Temperature Brazing Furnace

• After-sales Service: 12 Months
• Warranty: 12 Months
• Type: Electronic Components Firing Furnace
• Certification: CE, ISO
• Structure: Horizontal Type
• Brand: Hengli
• Model NO.: HSA Series
• Heating Power: 31kw
• Nitrogen Working Pressure: 0.3~0.5MPa
• Hydrogen Working Pressure: 0.2~0.4MPa
• Control Accuracy: +-1c
• Transport Package: Wooden Box Iron Bracket
• Specification: 8000*1200*1350mm
• Trademark: HENGLI
• Origin: China
• HS Code: 8514390090
• Production Capacity: 800set/Year

Product Description

Product Description

1. Model HSA1509-0507ZNH belt type brazing furnace
2. Technical Specification:

It is main used for brazing heating process for power modul in N2+H2 protective atmosphere.

1. Rated Temperature Range: 600ºC, Max. Temperature: 700ºC
2. The effective height:90mm
3. Belt width: 150mm

         Belt material: SUS310S

1. Chamber: 6mm thick SUS316 muffle tube structure.
2. Max. load on the belt: 50kg/m2(exclude the belt weight)
3. Drive system: big wrap angle friction drive
4. Belt speed: 50~300mm/min, stepless speed  regulation control with frequency conversion. Typical work speed is 160-180mm/min
5. Heating element: ceramic tube with high temperature resistance alloy wire
6. Furnace atmosphere: Nitrogen+hydrogen
7. Atmosphere control: 5 nitrogen + 3 hydrogen, each flow can be adjusted.(please see 3.2 for details)
8. Oxygen Content Test Point: Four points (Nitrogen source, heating up zone, free cooling zone and cooling zone) are connected in parallel to oxygen analyzer. Testing switcher point can be chosen through magnetic valve. The oxygen content in the chamber can be real time detected and the gas inflow is easy to adjust & choose
9. Oxygen Content(equipped with oxygen content analyzer for online testing)

Heating up zone ≤20ppm+ oxygen content from gas source
Free cooling zone≤15ppm+ oxygen content from gas source
Water cooling zone≤20ppm+ oxygen content from gas source

1. Exhaust System: entrance and exit Vestibule jacket have 1 exhaust stack(with ignition device) separately(please see no.3.2 for details)
2. Cooling Mode: use gas cooling plus water cooling, water cooling jacket has 1 water temperature test point
3. Belt cleaning: ultrasonic cleaning system
4. The layout of furnace structure(please see no.3.1 for details)
5. Control Accuracy: ±1ºC
6. Temperature Uniformity: ±2.5ºC, (Flat-Temperature zone 400ºC).
7. Zone Number:5 zones
8. Temperature Control Point: 5 points
9. Thermocouple: K type
10. Alarm instructions: over temperature, thermocouple failure, low gas pressure, low water pressure, belt stop alarm, ignitor alarm and other audible and visual protection
11. Power-off Protection: add manual operating device
12. Stop Button: One emergency stop buttons at the entrance and exit of the furnace
13. Atmosphere safety protection: the hydrogen inlet will be close automatice when any case happened such as power failure, low nitrogen gas pressure or ignitor failure.
14. Nitrogen consumption: 10~12m3/h
15. Nitrogen working pressure: 0.3~0.5MPa
16. Hydrogen consumption: about 4~6m3/h
17. Hydrogen working pressure: 0.2~0.4MPa
18. The temperauter of furnace surface: <35ºC
19. Discharge temperature at exit: <70ºC( at the belt speed≤160mm/min and the max temperature of products≤380ºC)
20. Heating power: 31kW
21. Insulation Power of Empty furnace: ≤11kW
22. Power source: capacity>41KVA, 3 phases 4 wires, 415~440VAC, 50Hz, single phase 240V
23. Weight: about 4000kg
24. Overall dimension: 8000*1200*1350mm(L*W*H).(Exclude mounting feet and alarm lamp)
25. Outside pannel use high temperature spraying coating and off-white color.

1. General Description

The furnace is devided into four major sections: furnace body, atmosphere control system, temperature control system and drive system

1. Furnace body design

Please see Table 1 and figure 1 for detailed layout of the furnace structure.                                       
Figure 1: Furnace layout drawing

Table 1
Code	Name	Length	Note
A	Total length	8000mm
B	Load and unload table	600mm
C	Furnace frame	6800mm
D	Entrance vestibule zone	900mm	Include entrance curtain and muffle elongation
E	Entrance insulation zone	150mm	Ceramic fiber insulation
F	Heating zone	1800mm	5 zones. Zone 1 and 2 are 450mm long with 8kw /zone . The rest zones are 300mm long with 5kw heating power for each.
G	Cooling zone	150mm	No heating elements, insulation material.
H	Free cooling zone	200mm	Gas inlet and test welding reserve place
I	Water cooling zone	3100mm	2 segment water jacket, water flow from bottom to top, its flow can be adjusted, 1 point water temperature test.
J	Exit transition zone	500mm	Included air curtain
K	Furnace height	1350mm	Exclude the height of stack
L	Equipment operation panel position

 

1. Atmosphere control system design

There are 8 atmosphere pipes: 5 nitrogen flowmeters, the flowmeter range is 12~120L/min, 3 hydrogen flowmeters, the flowmeter range is 12~120L/min. Please see the Figure 2 and table 2 for detailed gas layout.
      
Figure 2: Gas layout drawing
 

Table 2
Code	Name	Explanation
A	Entrance curtains	Nitrogen curtain, prevent outside air from entering the frunace.
B	Exhaust	The manual valve on Venturi exhaust tube can be used for adjusting gas flow
C	Heating up Gas(H2) inlet	Used for normal hydrogen supplement of heating zone
D	High Temp Gas(H2) inlet	Used for hydrogen protection and normal hydrogen supplement of high temp zone.
E	Free cooling gas(H2) inlet	Used for hydrogen protection and normal hydrogen supplement of cooling zone.
F	Cooling gas(N2) inlet	Used for nitrogen protection and normal nitrogen supplement of cooling zone.
G	Cooling gas(N2) inlet	Used for nitrogen supplement for cooling zone.
H	Exit curtains	Nitrogen curtain, prevent outside air from entering the furnace.
The actual gas flow of each pipe can be displayed by flowmeters.

 

1. The design of temperature control system
   1. 1. Temperature measuring: use K type thermocouple independent measuring and control on the temperature control point of each zone.
      2. Temperature control: use of Shimaden Intelligent temperature controller to control, with PID parameter auto tuning, high temperature upper limit alarm, thermocouple failure and other protective alarm functions
      3. Heating Control System: for the heating control, grouped supply the electricity by 3 alternating current contactors to reduce the instantaneous current impact to the electric fence caused by the equipment.
      4. Control mode: solid state relay zero cross trigger mode.
      5. Over Temperature Alarm: when over temperature occurred in some zones, over temperature alarm system in corresponding zones immediately send audible and visual alarm signal and meanwhile the heating of this zone is cut off, the buzzer sounds alarm.
2. Drive system design
   1. 1. Drive Control uses the servo system to control the speed by gear box. The speed is adjustable continually.
      2. Belt conveyor device: to drive the driving and drived wheel through chain and sprocket wheel, and then generate the friction force by driving wheel and the belt drive the belt running. There is a belt deviation guide device on the both sides at the entrance and exit.
3. Computer Control System

3.5.1Use DCS control system, intelligent temperature controller control (Shimaden), industrial computer monitor
3.5.2 Friendly human-machine interface
3.5.3 Industrial computer can carry out multiple programs saving
3.5.4 Real-time temperature and alarm record, data saving and printing
3.5.5 Computer control system with automatic heating up function
3.5.6 It also can provide the temperature calibration function in the chamber for adjusting process requirement.