Thread-rolling apparatus with distance-sensing operation

A thread-rolling apparatus with distance-sensing operation comprising:

• a base including a movable portion and a fixed portion disposed beside said movable portion, wherein said fixed portion includes a first body, a second body disposed between said first body and said movable portion, and an adjusting unit configured to adjust a first distance between said second body and said first body;
• a feeding unit disposed on said base;
• and
• a thread-forming assembly disposed on said base and located downstream of said feeding unit, wherein said thread-forming assembly includes a first die disposed on said movable portion and a second die disposed on said second body, a working passage being formed between said first die and said second die, a second distance being defined by a width of said working passage and related to said first distance;
• wherein a distance-sensing assembly is disposed on said fixed portion, said distance-sensing assembly including at least one sensing unit disposed on said first body and a processing module connected to said sensing unit and having a reference value stored therein, said distance-sensing assembly being configured to emit signals to said second body with said sensing unit, said emitted signals returning back from said second body after said signals reach said second body, said returned signals being received by said sensing unit and transformed into numeral data, said numeral data being transmitted to said processing module for comparison and analysis whereby said sensing unit is adapted to sense variations in said first distance in a non-contact manner during a process of forming threads on screw blanks, thereby determining checking whether said second distance is proper.