摘要:
A method of machining the contour of a printed circuit board by effecting a relative feed movement between a rotating tool and the other periphery of the printed circuit board. The electrical current value of a drive motor for driving a spindle to which the tool is attached is detected and an operation is conducted for changing the machining condition in such a manner as to reduce the electrical current value of the spindle drive motor and, at the same time, for changing also tool diameter compensation amount to a value corresponding to the machining condition after the change, at every time the detected electrical current value has reached a predetermined current value immediately before tool breakage and repeatedly by a predetermined number of times.
摘要:
A spot facing method and apparatus for processing a printed circuit board incorporates a sensing device having a sensor probe capable of sensing the level of the surface of a printed circuit board, another sensing device for sensing the position of the end of a tool, measuring circuits for measuring the distance between the sensing probe and the end of the tool and the distance between the surface of the printed circuit board and the end of the tool in accordance with the signals from the sensing devices, and a controller connected to the measuring circuits so as to control the feed of the tool thereby attaining a high dimensional precision in the depthwise direction in the spot facing.
摘要:
A work holding device used in an external form cutting machine for printed boards, the cutting machine including a work mounting table movable in X direction and a cutter mounting spindle movable in Y direction perpendicular to X direction, comprising holding device disposed above the table, pushing device for pushing said holding device, elevating device for raising and lowering said holding device. The holding device and the elevating device engage with each other slidably in a vertical direction with the pushing device interposed therebetween. By virtue of these arrangements, the printed boards are surely holded, resulting in an uniform cutting surface of piled printed boards. Holding pins used in prior arts for holding printed boards are not required, resulting in an improved operational efficiency of the cutting machine.
摘要:
A printed circuit board boring machine bores printed circuit boards stacked on a table, by a drill while pressing the printed circuit boards with a pressure foot. A piece having a hole through which the drill may pass is detachably mounted on a tip end portion of the pressure foot with a center of the hole being aligned with an axis of the drill. The piece may be attached to the pressure foot before the boring work so that the boards and the piece may be simultaneously bored by the drill while the hole in the piece may be used as a guide for the boring work of the boards.
摘要:
A method is provided for the confirmation of the diameters of plural drills of different diameters in a PWB working machine in which the drills are interchangeably mounted to perform drilling. The method comprises storing, with respect to each of the drills, data on whether or not the drill has already been used, checking the data of one of the drills upon drill replacement, and measuring the diameter of the drill only where the drill has not previously been used.
摘要:
A printed circuit board processing apparatus includes: a plurality of printed circuit board processing machines (A) arranged side by side, in each of which a printed circuit board (W) placed on a table (4) and a tool held by a single spindle (13) are caused to make a relative movement in the X-, Y- and Z-directions of the machine to process the printed circuit board (W); tipping devices (B) respectively mounted on the tables (4) in such a manner as to be swingable and adapted to perform the delivery of printed circuit boards (W); conveying devices (C) arranged along the beds (1) of the printed circuit board processing machines (A) and each equipped with a feeding path (C1) and a discharging path (C2) which are adapted to convey printed circuit boards (W) in an inclined posture; loading/unloading devices (D) arranged at a delivery position on the printed-circuit-board-processing-machine side of the feeding and discharging paths of the conveying devices (C) and adapted to effect the delivery of printed circuit boards between the tipping device (B) and the paths; a printed-circuit-board feeder (E) connected to one end of each feeding path (C1); a printed circuit board collecting device (F) connected to one end of each discharging path (C2); and detectors (G) allocated to the respective spindles (13) of the printed circuit board processing machines (A) and each adapted to read the kind of a printed circuit boards (W) fed onto the associated table (4).
摘要:
A tool holding device for use in a printed circuit board processing machine is provided with a record which is capable of storing data concerning the states of tools held on the tool holding device and data concerning processing conditions and which enables reading and updating of the recorded content through a communication with an external control device. Necessity for renewal of data registered in the NC device, which has to be executed in the known apparatus each time the tool holding device is exchanged, is eliminated thereby improving the rate of operation of the printed circuit board processing machine. In addition, the present invention enables an easy automatic replacement of tools when the lives of the tools are expired.
摘要:
The present invention relates to a printed circuit board presser device in a drilling machine. The board presser device is arranged such that it includes an axially movable upper-plate presser device which is provided on the outer side of a contact surface of the board presser device with a printed circuit board so that a top end surface of the upper-plate presser device extends to the side of a table beyond the contact surface; and an urging device for pushing the upper-plate presser device against the table by a force larger than an attraction force generated from the board presser device. With such construction, an upper plate is suppressed from floating during drilling the printed circuit board, and a distance of useless transfer movement of a drill decreased, to thereby improve an efficiency of a drilling operation.
摘要:
A tool detecting apparatus including a first detection part having a plurality of arrayed light-receiving elements receiving a beam of light passing around a tool placed in an optical path and a memory circuit for sequentially storing binary signals corresponding to the outputs of the light-receiving elements scanned at a predetermined time interval thereby updating its previous contents, and at least one of a second detection part, third detection part and a fourth detection part. The second detection part includes a state detection circuit and a timing circuit while the third detection part includes a holding circuit and an arithmetic circuit. The fourth detection part includes another arithmetic circuit.
摘要:
There is provided a printed circuit board whose peel strength is large and a printed circuit board fabrication method and a printed circuit board machining apparatus that allow a fabrication time and a fabrication cost to be reduced. The fabrication method of the printed circuit board comprises steps of forming a resist layer on a surface of the printed circuit board whose surface is made of an insulator, of forming a hole that is connected from the surface of the resist layer to a conductor pattern of an inner layer and a hole and grooves having a depth not connected with the conductor layer of the inner layer by irradiating lasers, of filling a conductive material into the holes and the grooves to form a conductor pattern and of removing the resist layer to project a portion of the conductor pattern out of the surface of the insulating layer.