A turning and thread-rolling machine with a pre-compression device, the turning and thread-rolling machine, comprising:
- a fixing base having a top side and a bottom side, the bottom side being fixed on a flat surface;
- the pre-compression device comprising:
- a pre-compression structure provided on the top side of the fixing base at a position adjacent to a first end of the fixing base, wherein the pre-compression structure is penetrated by a cold-rolling opening that opens at both a first end and an opposing second end of the pre-compression structure, the pre-compression structure is formed with at least two mounting grooves that extend in respective radial directions with respect to a longitudinal axis of the pre-compression structure and are equally angularly spaced from each other, each of said at least two mounting grooves has a first end exposed on an outer periphery of the pre-compression structure and an opposite second end in communication with the cold-rolling opening, and each of said at least two mounting grooves has a respective wall provided with a guiding portion;
- a carrier fixedly provided on the pre-compression structure and exposed in the cold-rolling opening, wherein the carrier has at top portion formed with a carrying groove;
- and
- at least two driving devices mounted in respective ones of the at least two mounting grooves, wherein each of said at least two driving devices has a respective end provided with a cold-rolling head and is configured to push the cold-rolling head thereof along a corresponding one of the guiding portions so that the cold-rolling head thereof is displaced toward a center of the cold-rolling opening, each cold-rolling head being formed with a respective forming groove, and contours of the respective forming grooves and a contour of the carrying groove are able to join together to form a compression space there between, and the compression space has a smaller diameter than an unprocessed reinforcing bar;
- a fixing mechanism locked on the top side of the fixing base at a position corresponding to the second end of the pre-compression device, wherein the fixing mechanism is provided with a first end, an opposing second end, and two clamping jaws;
- a guiding base having a top side and a bottom side, the bottom side being locked on the top side of the fixing base at a position corresponding to the second end of the fixing mechanism, wherein the guiding base is provided with a transverse translation mechanism and a longitudinal translation mechanism;
- a processing mechanism assembly locked on the top side of the guiding base and transversely provided with a starting mechanism, a turning mechanism, and a thread-rolling mechanism, wherein the starting mechanism has a first end provided with a position detection rod;
- and
- a control unit separately and electrically connected to each of the pre-compression device, the fixing mechanism, the transverse translation mechanism, the longitudinal translation mechanism, and the processing mechanism assembly, wherein when a portion of the unprocessed reinforcing bar that is adjacent to an end thereof extends into the cold-rolling opening and is placed on a wall of the carrying groove, the control unit drives the at least two driving devices to displace the respective cold-rolling heads thereof simultaneously toward the center of the cold-rolling opening, in order for the respective cold-rolling heads and the carrier to apply pressure to the unprocessed reinforcing bar and thereby form both a pre-compressed annular groove in the portion of the unprocessed reinforcing bar that is adjacent to the end thereof and a to-be-processed portion between the end of the unprocessed reinforcing bar and the pre-compressed annular groove;
- and when the end of the unprocessed reinforcing bar further extends into a space above the guiding base and is pressed against the position detection rod, the control unit drives the fixing mechanism to clamp the unprocessed reinforcing bar and also drives the transverse translation mechanism and the longitudinal translation mechanism so that the turning mechanism and the thread-rolling mechanism are sequentially displaced to a position corresponding to the to-be-processed portion to perform turning and thread rolling respectively, thereby processing the to-be-processed portion into a coupling end.