The temperature of the high vacuum and high temperature brazing electric furnace cannot rise

08-26-2025       Author: KJ technology

The temperature of the high vacuum and high temperature brazing electric furnace cannot rise, which may be caused by thermocouple failure, temperature control instrument problem, damaged heating element, magnetic voltage regulator failure or power supply problem. The following are specific analysis and solutions:

1. Possible cause analysis

Thermocouple issue

Thermocouple wire breakage or damage: Thermocouples are critical components for measuring temperature. If their wires are broken or damaged, it can result in inaccurate temperature display or inability to raise temperature.

Incorrect installation position of thermocouple: Improper installation or insufficient contact with the workpiece can cause temperature measurement deviation.

Temperature control instrument malfunction

Error in parameter setting of temperature control instrument: If the parameter setting of the temperature control instrument is unreasonable, it may result in insufficient heating power or inability to reach the set temperature.

Damaged temperature control instrument: Damaged or aged internal components of the temperature control instrument can affect its normal operation.

Heating element issue

Heating element aging or damage: Heating elements (such as graphite heating tubes) may age or be damaged after long-term use, leading to a decrease in heating efficiency.

Insufficient power of heating element: If the power of the heating element is not sufficient to meet the heating demand, it will cause the temperature to not rise.

Magnetic regulator malfunction

Loose wiring or poor contacts of magnetic voltage regulator: Magnetic voltage regulator is a key component for controlling heating power. If its wiring is loose or its contacts are poor, it will affect the output of heating power.

Magnetic regulator damage: Internal components of the magnetic regulator are damaged or aged, which can cause it to malfunction.

Power Problem

Unstable or phase deficient power supply voltage: Unstable or phase deficient power supply voltage can cause insufficient heating power, thereby affecting the heating rate.

Power line failure: Aging or poor contact of the power line can cause poor current transmission and affect the heating effect.

2. Solution method

Check and replace the thermocouple

Check the status of the thermocouple: Observe whether the thermocouple is broken or damaged, and replace it promptly if there are any problems.

Ensure proper installation of thermocouples: Install thermocouples correctly according to the equipment manual and ensure that they are in full contact with the workpiece.

Repair or replace temperature control instruments

Check the parameter settings of the temperature control instrument: Refer to other temperature control instruments in normal use and calibrate all parameter settings.

Repair or replace temperature control instrument: If the temperature control instrument is damaged, it should be replaced with a new one in a timely manner.

Check and replace the heating element

Check the status of the heating element: Observe whether the heating element is aging or damaged, and replace it promptly if there are any problems.

Ensure power matching of heating elements: Check if the power of the heating elements meets the heating requirements. If it is insufficient, replace the heating elements with higher power.

Repair magnetic voltage regulator

Check the wiring of the magnetic voltage regulator: Ensure that the wiring of the magnetic voltage regulator is firm and free of looseness.

Repair or replace magnetic regulator: If the magnetic regulator is damaged, it should be replaced with a new one in a timely manner.

Check the power system

Stable power supply voltage: Use a voltage regulator to stabilize the power supply voltage, ensuring that the voltage remains stable within the rated range.

Check the power supply circuit: Check whether the power supply circuit is aging or has poor contact. If there are any problems, repair or replace them in a timely manner.