Patent ID: 6108881
Filing Date: 2000-08-29
Classification: H01R,Y10T

Abstract:
An SMD-C type terminal automatic pressing machine comprising a support frame, a wire reel rack, a wire clipping mold, an embossing mold, a shearing mold, a material feeding device, a first wire shifting clamp, a second wire shifting clamp and a rectifying mold, the wire reel rack being mounted at an uppermost end of the support frame for inserting with several wire reels, the wire clipping mold, embossing mold and shearing mold being mounted on the support frame for sequentially processing a wire track pulled out from the wire reel mounted on the wire reel rack and performing a pin insertion operation, the automatic pressing machine being characterized in that:the material feeding device is mounted on one side of a working table of the support frame, having a terminal moving rail including several sections of material feeding rails, material shifting fixing blocks and rectifying fixing blocks, one side of the terminal moving rail being disposed with a vertically movable fixing seat and a material feeding structure connected with each other by a first moving arm for synchronously feeding the material, the vertically movable fixing seat having a roller, whereby when moving downward, the roller is rollable on a plastic guide pad disposed under the vertically movable fixing seat, a second moving arm being mounted on an upper portion of the vertically movable fixing seat, a material taking block being screwed to the first moving arm, the material taking block having a shape of a stepped cylinder, a material feeding lever being disposed at a front end of the second moving arm for pushing a forward terminal in which the wire track is inserted and positioned on the first wire shifting clamp, a restricting hook block being disposed on a lateral side of the terminal moving rail corresponding to the vertically movable fixing seat and at a same position, the restricting hook block being connected with a first spring for restricting the terminal on the terminal moving rail from sliding forward, whereby the material taking block can only move one terminal at one time, another material feeding structure on the lateral side of the terminal moving rail including a third moving arm and a moving arm fixing seat, the material feeding lever being screwed below the front end of the third moving arm, a stepped cylindrical material taking block being disposed on the material feeding lever, when the material taking block moves downward, the material taking block taking a terminal thereunder, when moving forward, the front end of the material feeding lever making the terminal positioned on the material shifting fixing seat move forward, a restricting hook block being disposed on a lateral side of the terminal moving rail corresponding to the material feeding structure and at a same position, the restricting hook block being connected with the first spring for restricting the terminal from automatically sliding onto the material shifting fixing seat;the first wire shifting clamp being composed of a main body and two wire shifting arms, the two wire shifting arms being fixed on two sides of the main body by a shaft, the wire shifting arms and the main body being formed with corresponding sockets for placing therein a second spring, whereby when the wire shifting arm is pressed, the second spring helps in restoring to a home position, a fixing seat hole being formed on upper side of the main body for the terminal to fixedly insert therein, the main body including a shaft therein for fixedly inserting on the lifting shaft, a recess on one side of the moving arm being disposed with multiple recessed wire channel for placing the wire track of the terminal therein, whereby when the wire shifting arm is pressed, a wire shifting operation can be easily completed, when the wire shifting arms shift the wire, each of the wire shifting arms being synchronously pressed by one thread rod, the one thread rod being driven by a cam to drive a roller screwed on the L-shaped slide block, whereby when the roller rolls on the projecting of the cam, the L-shaped slide block is relatively moved to drive the L-shaped block and pad block screwed on the L-shaped slide block and make the thread rod move forward to press the wire shifting arm, the other thread rod being similarly driven by a cam to drive a roller screwed on the slide block, whereby when the roller rolls on the projection block of the cam, the slide block is directly relatively moved to drive the pushing rod fixing seat and locating block screwed on the slide block and make the thread rod move forward to press the wire shifting arm, the cams of the driving thread rods being positioned on the same transmission shaft so that when the transmission shaft rotates, the two thread rods are directly urged to synchronously press the wire shifting arms via the transmission components;the second wire shifting clamp being disposed above a tail end of the terminal moving rail, having two symmetrical wire shifting blocks mounted on a wire shifting block fixing seat mounted on a slide rail of a movable retaining board by slide blocks, each wire shifting block fixing seat being driven by a cylinder to move left and right, whereby the wire shifting block thereon also moves left and right to complete the wire shifting operation with respect to the upper half portion of the wire track of the terminal on the material shifting fixing block, an L-shaped block being screwed on the retaining board, a thread rod being screwed under each side of the L-shaped block, a third spring being fitted between the thread rod and the thread rod on the cylinder fixing seat, a rear side of the L-shaped block being screwed to a slide block, whereby the L-shaped block is slidable along the slide rail via the slide block, a locating block being screwed on the L-shaped block, whereby the cylinder can push the locating block to drive the L-shaped block and make the retaining board and wire shifting block ascend and descend;the rectifying mold being screwed on the rectifying mold fixing seat of the retaining board of the second wire shifting clamp, the surface of lower end of the rectifying mold including multiple recessed lines, whereby when the retaining board moves downward, the rectifying mold synchronously moves downward so as to bend the substantially C-shaped wire track of the terminal into a C-shaped pattern; whereinafter the terminal is fed into the material feeding rail, the material taking block of the material feeding device sequentially sends the terminals to a fixed position, after which the wire clipping mold, embossing mold and shearing mold complete the pin insertion operation of the terminals and subsequently the first wire shifting clamp, second wire shifting clamp and rectifying mold operate to bend a straight wire track of the inserted terminal into the C-shaped pattern.