A fence assembly of a table saw includes rear and front sliding members on two rails of a table respectively, the rear sliding member having three top projections, the front sliding member having three forward projections, a transverse member interconnecting the sliding members, and a spring biased workpiece guide bar on the transverse member. The workpiece guide bar includes a front locking element for locking the front sliding member, a rear locking element for locking the rear sliding member, the rear locking element having a recess for receipt of the top projection, and a spring biased lever pivotably secured to a front end of the workpiece guide bar. A latch of the lever can be engaged with a protuberance of the front locking element to lock the front locking element or disengaged from the protuberance to unlock same. The lever includes a wedge for locking the front sliding member.

A fixture for machining wheel outer rim without trace includes a positioning and clamping portion and a flexible support portion. A base is fixed on a bottom plate, and a screw is configured to compress an expanding pressure plate during being tightened so that the outer circumference of an expanding sleeve expands a center hole of a wheel; and the positioning columns are inserted into bolt holes of the wheel. A lower pressure plate is fixed on the base, and limiting columns and an upper pressure plate are installed on the lower pressure plate, with steel balls and rubber strip being enclosed in a space formed by the lower pressure plate and the upper pressure plate. The fixture meets the requirement for machining the wheel outer rim without trace, has the characteristics of simple structure, convenient manufacture, stable performance and precision, and meets the requirements of automatic production.

Workpiece-holding tools and techniques are described. Workpiece-holding tools and techniques are usable to ensure consistent and durable alignment of various workpieces while providing access for performing attachment techniques thereon. In one example, the workpiece-holding tool is configured to allow objects to be held or removably affixed to an alignment surface. Holding objects with the workpiece-holding tool ensures that the alignment of objects with an alignment surface does not change while a user is operating upon a workpiece, e.g., as by joining aligned objects together, without interfering or obstructing access to the objects. The ability to hold objects is enhanced by the inclusion of cutouts that provide increased access to interior surfaces of the workpiece-holding tool, such as to increase the area available for use of clamps or other fastening devices.

Workpiece-alignment tools and techniques are described. Workpiece-alignment tools and techniques are usable to ensure consistent and durable alignment of various workpieces while providing access for performing attachment techniques thereon. In one example, the workpiece-alignment tool includes alignment surfaces that are joined to one another and oriented at corresponding specific angles. The workpiece-alignment tool includes accessibility cutouts and access spaces that provide a user simultaneous access to points around a joint formed by objects aligned with the alignment surfaces. In this way, the workpiece-alignment tool provides accessibility that allows a user to operate upon a workpiece, e.g., as by joining aligned objects together, without interfering or obstructing access to the objects.

A vehicle body part rack, being used for placing a vehicle body part during assembly or post-treatment of said vehicle body part, including a base plate and a plurality of vehicle body part supports arranged on the base plate, each of the vehicle body part support comprising a supporting head, and a supporting rod connected to the supporting head and the base plate, the supporting rod being movable with respect to the base plate, characterized in that the rack has lateral supports able to hold the vehicle body part and to rotate it.

A control system of a machine tool includes a hydraulic pressure adjuster. The hydraulic pressure adjuster includes a sequence program controller that includes components for adding a function of adjusting a hydrostatic pressure of a static pressure oil supplied to a hydrostatic pressure guide mechanism, which are a pressure setting unit, a constant acceleration motion controller, a workpiece-weight calculator and a supply state adjuster.

A positioning device to position, during in vehicle construction, a vehicle body component having at least one locating bore. The positioning device includes a locating pin having a conical end designed to be guided axially through a locating bore of the vehicle body component to centre and position the vehicle body component. The locating pin is mounted in a radially floating manner.

A circular saw cutting machine (1) includes a machine main body (10), an articulated robot (60), and a cutter stocker (70). A circular saw (5) is secured and interposed by a cutter clamp cylinder (CYL21) between a front end face (32) of the main spindle (21) and a cutter presser piece (50) with pins (33, 51) inserted in pin insertion holes (5b). When removing the circular saw (5), a hydraulic is switched over to cause the cutter clamp cylinder (CYL21) to perform unclamping so that the cutter presser piece (50) can be pulled out of the main spindle (21). When the articulated robot (60) performs cutter change, a main spindle motor (M10) and a brake (25) are controlled based on the rotation angle detected by a spindle stop position sensor (SE10) to stop the main spindle (21) in a predetermined home angle condition.

A guide assembly for aligning a workpiece on a table of a saw device includes a guide member having a first end and a second end along the longitudinal axis that is sized to span a dimension of the table. The guide member includes first and second locking mechanisms located at opposite ends of the guide member that are operable to secure the guide member to the table. The guide assembly further includes a fine adjustment mechanism incorporated into the guide member that is operable when the first and second locking mechanisms are locked. The adjustment assembly includes a side plate movably mounted to the guide member between the first and second ends, and a movement mechanism for moving the side plate relative to the guide member in a direction perpendicular to the longitudinal axis.

A circular saw cutting machine (1) includes a machine main body (10), an articulated robot (60), and a cutter stocker (70). A circular saw (5) is secured and interposed by a cutter clamp cylinder (CYL21) between a front end face (32) of the main spindle (21) and a cutter presser piece (50) with pins (33, 51) inserted in pin insertion holes (5b). When removing the circular saw (5), a hydraulic is switched over to cause the cutter clamp cylinder (CYL21) to perform unclamping so that the cutter presser piece (50) can be pulled out of the main spindle (21). When the articulated robot (60) performs cutter change, a main spindle motor (M10) and a brake (25) are controlled based on the rotation angle detected by a spindle stop position sensor (SE10) to stop the main spindle (21) in a predetermined home angle condition.