Abstract: A measurement apparatus includes a workbench, a loading mechanism fixed to the workbench, a deformation measuring mechanism, and a stress meter. The deformation measuring mechanism includes a slide beam, and a displacement meter. The loading mechanism includes a guiding shaft extending through a to-be-tested coil spring. A measuring pole of the stress meter, the sliding beam, and the guiding shaft are coaxial. Opposite ends of the coil spring are respectively abutted the slide beam and the loading mechanism. A measuring pole of the displacement meter is connected to the sliding beam. When the stress meter slides towards the slide beam, the displacement of the detecting pole of the displacement member is equal to a change of a length of the coil spring, and recorded by the displacement meter, and a value of a force applied to the coil spring is recorded by the stress meter.

Abstract: An apparatus for testing an angle between first and second legs of a torsion spring includes a board, a limiting block and a pin sandwiching the first leg, a positioning member positioning a main body of the torsion spring with the limiting block, and a test block including a bottom wall slidably contacting the limiting block, and a first sidewall and a second sidewall. Angles between the bottom wall and the first and second sidewalls are respectively minimal and maximal values that equal 180 degrees subtracted by an angle within a qualified range between the first and second legs. The first and second sidewalls is moved toward the second leg in turn. If a bottom end of the first sidewall and a top end of the second sidewall both can contact the second leg, the angle between the first and second legs is qualified. Otherwise, the angle is unqualified.

Abstract: A deformation testing device includes a base holding a workpiece and a testing machine arranged on the base. The testing machine includes a distance-measurement device and a force-applying device. The distance-measurement device includes a distance meter metering a moving distance of an elastic portion of the workpiece and includes a measurement probe. The force-applying device includes a force meter and a transmission member. The force meter slidably is mounted on the base and includes a force-applying post. The transmission member includes a first post and a second post secured to the first post. The first post is aligned with the force-applying post transmits a force from the force-applying post to the elastic portion. The measurement probe abuts against the second post. The force meter applies and measures a force acted upon the elastic portion through the force-applying post and the first post.

Abstract: A concentricity test device includes a bracket, a positioning member, an operation member, and a probe indicator. The bracket includes a beam, and opposite first and second supporting arms. The positioning member is pivotably connected to the first supporting arm and includes a shaft. A pierced round workpiece is placed around the shaft. The operation member is pivotably connected to the second supporting arm and includes a pole detachably locked to the shaft. The probe indicator is fixed to the beam, and includes a spring-loaded probe and a gauge head connected to the probe to engage with a circumference of the workpiece. The pole, the shaft and the workpiece are rotated 360 degrees, values shown by the probe indicator show moving distances of the probe, and a maximal difference value of the moving distances of the probe reveals the concentricity of the workpiece.

Abstract: A height measuring device for a cavity includes a main body, a fastening member fastened to the main body, a scale, a measuring pole, a motion pole, and a transition member. The scale is fastened to an end of the main body, and includes a stretchable measuring head. The measuring pole is slidably mounted to the main body up and down. The motion pole is horizontally and slidably mounted to the fastening member. The transition member includes a pivoting portion and two perpendicular transition poles. The pivoting portion is rotatably connected to the fastening member. One of the transition poles abuts against a first end of the motion pole. The other transition pole abuts against a bottom end of the measuring pole.

Abstract: A dummy for testing whether sizes of receiving spaces for receiving electrical elements in an enclosure are suitable or not. The dummy includes a frame and a handle attached to the frame. The frame includes a bottom wall. A number of wheels are rotatably attached to opposite ends of the bottom wall. Thereby, the frame is slidably received in the enclosure. A width and a height of the frame are respectively equal to minimum values of a width and height of one of the receiving spaces.

Abstract: A positioning device for positioning a number of two-sided adhesive pieces includes a base, a number of pulling blocks, and a pressing block. The base includes a positioning block defining a number of positioning holes. Each pulling block includes a connecting plate, and a supporting plate protruding out from a top end of the connecting plate. A first surface of each adhesive piece is adhered on a top surface of one of the supporting plate. The connecting plate is received in a corresponding one of the positioning hole. The pressing block is attached to the positioning block. A second surface of each adhesive piece to be adhered to a bottom surface of the pressing block.

Abstract: A test device includes a base rested on an object, an inserting member slidably mounted to the base and contacts a slanted surface of a chamfer of the object, and a test member slidably rested on the base. The base includes a positioning bar abutting a bottom end of the chamfer. A first cutout and a second cutout communicating with the first cutout and positioned in front of the first cutout are defined in a bottom surface of the testing member. A depth of the second cutout equals the tolerance of a standard depth of the chamfer. If a top surface of the inserting member can be received in the second cutout, the depth of the chamfer is qualified. If the top surface of the inserting member cannot be received in the second cutout, the depth of the chamfer is unqualified.

Abstract: A test device for testing whether a coaxial accuracy between a test hole and a standard hole of an object is qualified or not includes a base to support the object, a fixing member to fix the object, and a positioning member and a testing member respectively mounted to a bottom and a top of the base. The positioning member includes a positioning pole to be inserted into a standard hole of the object. The testing member includes a testing pole slidably relative to and aligning with the positioning pole. A diameter of the testing pole is set to be equal to a standard diameter of a test hole subtracting a coaxial tolerance of the test hole. If the testing pole is capable of being inserted into the test hole, the coaxial accuracy between the test and standard holes of the object is qualified.

Abstract: A depth testing device for testing depth of a screw drive includes a supporting assembly which is for supporting the screw, a calibrating assembly, and a testing assembly. The calibrating assembly includes a calibrating element which presses on the top end of the screw. The testing assembly includes a testing device and a testing probe, the testing device includes a testing member and a testing pole stretching relative to the testing member. One end of the testing probe is received in the testing pole. The reading of the testing member is reset to zero first, then the other end of the testing probe is moved and is inserted into the drive of the screw, recording the reading of the testing member. The depth of the drive of the screw is calculated by the test reading subtracted by the thickness of the calibrating element.

Abstract: A measurement apparatus includes a workbench, a loading mechanism fixed to the workbench, a deformation measuring mechanism, and a stress meter. The deformation measuring mechanism includes a slide beam, and a displacement meter. The loading mechanism includes a guiding shaft extending through a to-be-tested coil spring. A measuring pole of the stress meter, the sliding beam, and the guiding shaft are coaxial. Opposite ends of the coil spring are respectively abutted the slide beam and the loading mechanism. A measuring pole of the displacement meter is connected to the sliding beam. When the stress meter slides towards the slide beam, the displacement of the detecting pole of the displacement member is equal to a change of a length of the coil spring, and recorded by the displacement meter, and a value of a force applied to the coil spring is recorded by the stress meter.

Abstract: An apparatus for testing an angle between first and second legs of a torsion spring includes a board, a limiting block and a pin sandwiching the first leg, a positioning member positioning a main body of the torsion spring with the limiting block, and a test block including a bottom wall slidably contacting the limiting block, and a first sidewall and a second sidewall. Angles between the bottom wall and the first and second sidewalls are respectively minimal and maximal values that equal 180 degrees subtracted by an angle within a qualified range between the first and second legs. The first and second sidewalls is moved toward the second leg in turn. If a bottom end of the first sidewall and a top end of the second sidewall both can contact the second leg, the angle between the first and second legs is qualified. Otherwise, the angle is unqualified.

Abstract: A concentricity test device includes a bracket, a positioning member, an operation member, and a probe indicator. The bracket includes a beam, and opposite first and second supporting arms. The positioning member is pivotably connected to the first supporting arm and includes a shaft. A pierced round workpiece is placed around the shaft. The operation member is pivotably connected to the second supporting arm and includes a pole detachably locked to the shaft. The probe indicator is fixed to the beam, and includes a spring-loaded probe and a gauge head connected to the probe to engage with a circumference of the workpiece. The pole, the shaft and the workpiece are rotated 360 degrees, values shown by the probe indicator show moving distances of the probe, and a maximal difference value of the moving distances of the probe reveals the concentricity of the workpiece.

Abstract: A measuring device for measuring adhesive strength of two-sided adhesive pieces includes a frame, a supporting apparatus fixed to the frame, and a positioning apparatus installed on the supporting apparatus. The frame includes a pull member slidably installed on the frame along a first direction. The supporting apparatus includes a base secured on the frame, and a supporting assembly slidably installed on the base along a second direction perpendicular to the first direction. The positioning apparatus includes a supporting plate slidably installed on the supporting assembly along a third direction perpendicular to the first and second directions, and a number of pulling blocks. Each adhesive piece is adhered between the supporting plate and a corresponding pulling block. Each pulling block is connected to the pull member to be pulled up to disengage from the supporting plate, thereby measuring the adhesive strength of the adhesive piece.

Abstract: A positioning device for positioning a number of two-sided adhesive pieces includes a base, a number of pulling blocks, and a pressing block. The base includes a positioning block defining a number of positioning holes. Each pulling block includes a connecting plate, and a supporting plate protruding out from a top end of the connecting plate. A first surface of each adhesive piece is adhered on a top surface of one of the supporting plate. The connecting plate is received in a corresponding one of the positioning hole. The pressing block is attached to the positioning block. A second surface of each adhesive piece to be adhered to a bottom surface of the pressing block.

Abstract: A testing device for testing of rivets is provided. The testing device includes a first holding element and a second holding element that can be driven toward the first holding element to cooperatively define at least one hole on which at least one type of rivet can be installed. The second holding element also can be driven to separate from the first holding element to release the installed rivets for analysis.

Abstract: A test device for testing whether an axis of a first portion of an article is coaxial with an axis of a second portion of the article includes a supporting member, a benchmark member fixed to a first end of the support member, and a test member slidably received in a second end of the supporting member opposite to the first end. The benchmark member includes a first test portion to position the first portion of the article that are coaxial within a coaxial tolerance. The test member includes a second test member coaxial with the first test portion. If the second portion is capable of being positioned to the second test portion, the article is qualified. If the second portion is incapable positioned to the second test portion, the article is unqualified.

Abstract: A test device for testing whether the distance between centers meets specifications includes a support member, a benchmark member set on a first end of the support member, to be positioned at the first through hole, a test member set on a second end of the support member, to be positioned at the second through hole, and a sliding member defining a receiving slot. The test member is also slidable in a direction perpendicular to the slidable direction of the test member. If the test member can enter the receiving slot, the first article is qualified, if test member cannot enter the receiving slot, the second article does not meet the required standard.

Abstract: A torque testing device includes a base, a clamping device for clamping a fastener, a holing cylinder mounted on the base, a mounting beam mounted on the holding cylinder, a moving component, a rotation component, and a torque wrench. The mounting beam defines a nesting hole. The moving component includes a tubular member received in the nesting hole and a driving component mounted on the mounting beam for driving the tubular member towards the fastener. The rotation component includes a rotation shaft and at least one rotation element positioned between the rotation shaft and the tubular member. The rotation shaft is moved with the tubular member towards the fastener. The rotation shaft is capable of being rotated about the tubular member through the rotation element. The torque wrench is connected to the rotation shaft for applying torque to the rotation shaft and revealing the value of the torque.

Abstract: A measuring apparatus for measuring a counterbore hole chamfer depth of a workpiece, includes a positioning member having a guiding hole aligned with the counterbore hole of the workpiece, a support member having a receiving hole aligned with the guiding hole, and a measuring device supported by the support member. The measuring device includes a gauge, a retractable pole connected to the gauge and extending into the receiving hole, and a measuring head portion connected to the retractable pole and movably received in the guiding hole. The measuring head portion has a cone-shaped end for abutting on an inner wall of the counterbore hole chamfer, thereby making the measuring head portion move back in the guiding hole and the retractable pole retract. The gauge is configured for calculating and displaying the depth of the counterbore hole chamfer based on the distance the retractable pole retracts.