A method of verifying a magnitude of a delivered output torque during a tightening operation of a threaded joint performed by a hand held power wrench including a housing, a motor, an output shaft, and a power transmission connecting the motor to the output shaft. The method includes: tightening the threaded joint; monitoring a magnitude of a direct torque acting along the power transmission during the tightening by at least one direct torque indicating sensor; monitoring a magnitude of a reaction torque transferred via the housing during the tightening by at least one reaction torque sensor; comparing the monitored magnitude of the direct torque with the monitored magnitude of the reaction torque; and determining, based on the comparison, whether the accuracy of the delivered output torque is acceptable.

A screwdriver is connected to an electric power supply, and rotates a mounted bit to tighten a screw. The screwdriver includes a camera, an image information recording section, a basic information registration section, a determination section, and an LED unit. The camera captures the screw to be tightened or surroundings of a threaded hole in which the screw is to be tightened. The recording section records an image captured by the camera. The registration section registers beforehand image information, which has been acquired by capturing with the camera an image of the surroundings of the threaded hole, as basic information. The determination section determines whether or not new image information, which has been newly acquired by capturing an image of the surroundings of the threaded hole with the camera, coincides with the basic information. The LED unit notifies a result of determination by the determination section.

A tool is equipped with a torque sensor, suited for a tightening task of a fastening component of a device such as a fluid control system that requires a large number of fastening components for assembly and has a narrow space for access to the fastening components, and capable of automatically detecting a tightening torque. The tool includes a torque sensor capable of detecting a tightening torque for tightening a fastening component acting on a bit. The torque sensor initiates measurement of the tightening torque when the tightening torque detected exceeds a set threshold value, completes measurement when the tightening torque detected falls below the set threshold value and a set time elapses, and outputs torque-related data formed on the basis of measurement data from measurement initiation to measurement completion and including a measurement time. The torque-related data includes a peak value of the measurement data.

A power tool system includes a hydraulic power tool. The hydraulic power tool includes a hydraulic drive, a sensor, and a first electronic processor. The sensor is configured to detect an operational parameter of the hydraulic drive during an operation by the hydraulic drive. The first electronic processor is configured to store a plurality of data points based on the operational parameter detected during the operation and send the plurality of data points to an external device. The external device includes a display screen and a second electronic processor configured to receive the plurality of data points from the hydraulic power tool, control the display screen to display an expected data point for the operational parameter for the operation, and control the display screen to display an actual data curve based on the plurality of data points, the actual data curve overlaid on the expected data point.

Embodiments of the present disclosure provide a control system including: a power wrench; and a controller operatively connected to the power wrench, wherein the controller is configured to perform actions including: directing an operative head of the power wrench to turn in response to a pressure-angle derivative of the operative head being below a predetermined threshold, defining an origin at an angular position of the operative head where the pressure-angle derivative of the operative head exceeds the predetermined threshold, directing the operative head to turn by an angular step in response to: the pressure-angle derivative of the operative head exceeding the predetermined threshold, and an angular differential of the operative head being less than a target value; and directing the operative head to cease turning in response to the angular differential of the operative head being approximately equal to or greater than the target value.

A torsion-detecting pneumatic impact tool is provided. A hammering set having at least one hammering block and a rotating portion which is connected with each hammering block. A transmission shaft penetrates through each the hammering block. A torsion detecting unit includes a marking piece which has a plurality of blocks, at least two sensors which detect the marking piece and an processing unit which is electrically connected with each the sensor. The hammering set, the marking piece, and the rotating assembly rotating synchronously. When each the hammering block swing strikes the transmission shaft in a direction, the hammering set and the marking piece rotate reversely slightly because of the counterforce of swing strike. When the marking piece rotates reversely, the processing unit receives a signal of a degree of rotation of the blocks detected by the at least two sensors and computes a torsion value.

In an embodiment herein, a tool is described. The tool comprises an inclinometer configured to determine a first inclination of the tool; and transmit a first indicator to a controller in response to determining the first inclination of the tool. The tool further comprises a controller interface configured to receive a first program from the controller in response to transmitting the first indicator. The tool further comprises a tool head configured to tighten a first fastener based, at least in part, on the first program.

An apparatus and control system of a programmable air servo motor includes an air servo motor and an air servo motor driver, which are bi-directionally communicable with each other via communication units. The air servo motor includes an air motor, a sensor module, and a brake module that is normally locked and can be unlocked or locked by the air servo motor driver. The air servo motor driver includes a control module, an actuation module and a communication module. After actuating the air servo motor, the air servo motor driver receives torque, rotational speed and angle signals output by the sensor module. The actuation module drives the air servo motor to stop emergently, switch between forward and reverse rotation, increase or reduce rotational speed, operate at a specific angle, move by inching and operate at controlled torque similar to an electric servo motor without the need of an encoder.

A bolt clamping force transducer for a bolt tightening operation is introduced to tighten a bolted joint by driving a torque rotating shaft in a clamping force transducer, such that a helical mechanism at one end of the torque rotating shaft generates an axial force for pressing a force sensing module and thus generates a strain value thereof. A socket is driven by the other end of the torque rotating shaft, thereby generating a clamping force under which the bolted joint of a specific specification is tightened. A parameter relation between the strain value and the clamping force is calibrated with a standard axial force gauge to facilitate calculation and control of the clamping force during the tightening process where the bolted joint fitted to any torque tool is sensed to control the precision of the clamping force being exerted on the bolted joint, thereby enhancing the quality thereof.

A joint guarantee system for vehicle assembly is applied to a vehicle assembly line that assembles an assembling object to a vehicle carried through on a conveyer line as an assembling element, and includes a vehicle detector that detects the vehicle entering the conveyer line, tool detectors disposed along the conveyer line that detect a position of an assembling tool on the conveyer line, an inertial sensor module installed in the assembling tool that detects an angle and a displacement of the assembling tool for an assembling point of the vehicle and the assembling object, a tool controller that applies control signals corresponding to a predetermined assembling point of the vehicle and the assembling object, a kind of assembling element, and assembling torque of the assembling tool, to the assembling tool, and a main controller that processes and stores the above information.