Automatic Soldering Machine Temperature and Cycle Technical Guide

automatic soldering machine undertakesreflow soldering, wave solderinghard-to-cover processes, suitable for mixed assembly boards, heat-sensitive components and post-SMT soldering. This article focuses onWelding temperature, soldering iron tip life, dual-station cycle, and positioning accuracy, objectively organized based on public data.

I. the solder melting point and the soldering iron operating temperature are not the same thing

soldering is a thermodynamic process: the soldering iron tip heats the lead and pad above the solder liquidus temperature; the solder melts instantly on contact and forms an intermetallic-compound connection. The solder melting point is the lower liquidus limit; the iron operating temperature must be significantly higher than the melting point to offset instantaneous heat loss on contact.leaded eutectic Sn63/Pb37 approx. 183°C,soldering iron 315–340°C；lead-free SAC305 (Sn96.5/Ag3.0/Cu0.5) about 217 deg C, soldering iron 350-380 deg C, consistent with the IPC J-STD-006 and IPC-A-610 process windows.

II. the cost of excessive temperature: soldering iron tip oxidation and shortened life

excessive soldering iron temperature cannot speed up soldering but accelerates tip oxidation and shortens life. Industry maintenance manuals point out that at over 470 deg C the oxidation rate is about twice that at 380 deg C; it is recommended to control within 350-380 deg C and keep it as low as possible. The automatic soldering machine soldering-iron tip life is divided by the number of solderable points, commonly 20,000 points, 30,000 points; beyond the limit, surface damage and perforation occur, requiring timely replacement.

III. solder breaking and automatic cleaning: stable solder feeding, extended consumable life

solder wire containsflux core, un-released gas during solder feeding easily splashes and produces solder dross. The solder-breaking mechanismbreaks the hollow structure inside the solder wire, releases flux gas, reduces splashing and stabilizes the solder feed volume. Bolli 5331 is equipped with Bolli's self-developed solder-breaking machine, high-frequency temperature control and heating core, combined with automatic cleaning to remove residue, stabilizing quality and extending consumable life.

IV. Dual-Station Cycle: Keep the Machine Running During Loading and Unloading

In single-station welding, clamping, loading/unloading and welding are serial, the equipment runs idle.Dual stations (dual loading platforms) let one station weld while the other loads and unloads; the machine keeps running, increasing output. Bolli 5331 operating range X axis 500mm, Y1/Y2 axis each 300mm, Z axis 100mm, maximum speed 500mm/s (customizable above 800mm/s), scheduled by the self-developed control system for teach programming and graphic import, supporting point-to-point and block-to-block copying.

V. Repeat positioning accuracy determines batch consistency

Consistent solder joints require consistent placement each time. Bolli 5331 repeat positioning accuracy ±0.02–0.05mm, sufficient to supportconnectors, DC terminals, LED light stripsetc. batch operations of tiny solder joints. This accuracy is the repeat positioning caliber; actual quality is also affected by soldering iron tip condition, temperature profile and fixture alignment; sample testing verification is the standard.

6. Summary

the stability of the automatic soldering machine comes fromtemperature profile, soldering iron tip maintenance, solder feeding and tact designsystem coordination. On its 5331 dual-station soldering machine, Bolli uses a self-developed control system to link teaching programming, solder breaking and feeding, and automatic cleaning, providing equipment and prototyping support. For specific process validation and model selection, please contactBolli Automation Co., Ltd.13352947677。