374results about How to "Precise clamping" patented technology

The invention provides a full-automatic PCB (printed circuit board) positioning clamp. The full-automatic PCB positioning clamp comprises a support seat, a support rod, a sliding support plate, a fixed-side railing, a movable-side railing, width adjusting mechanisms, conveying mechanisms, clamping mechanisms, a top plate mechanism, a detecting mechanism and a positioning mechanism, wherein the support rod and the width adjusting mechanisms are assembled on holes reserved on the lateral side of the support seat, the fixed-side railing is fixed on the support seat, the sliding support plate is slidably connected with the support rod, the movable-side railing is fixed on the sliding support plate which is connected with the width adjusting mechanisms, the conveying mechanisms are mounted on the inner sides of the fixed-side railing and the movable-side railing to form a PCB delivery rail, the clamping mechanisms are fixed on the fixed-side railing and the movable-side railing, the detecting mechanism is mounted on the fixed-side railing, and the positioning mechanism used for positioning the PCB when entering is fixed at a positioning position on the fixed-side railing. The full-automatic PCB positioning clamp can quickly automatically deliver the PCB, and can position and clamp the PCB accurately, reliably and conveniently, and production efficiency of an assembly line is improved.

The invention discloses a welding tool of an anti-collision beam and a mounting plate. The welding tool comprises a mounting plate body, the anti-collision beam and an energy absorbing box, wherein the anti-collision beam is welded to the energy absorbing box. Positioning holes are formed in the mounting plate body. The mounting plate body comprises a mounting platform. The mounting platform is provided with a supporting platform, a supporting assembly, a first pressing assembly, a second pressing assembly, a transverse pushing positioning assembly and end part positioning blocks. A positioning column is arranged on the supporting platform. The supporting platform and the positioning column position the mounting plate body. The second pressing assembly compresses the mounting plate body and the supporting platform. A positioning circular hole is formed in the anti-collision beam. A circular hole positioning assembly are arranged on the mounting platform. The supporting assembly, the end part positioning blocks and the circular hole positioning assembly position the anti-collision beam. The first pressing assembly compresses the anti-collision beam. The transverse pushing positioning assembly positions the energy absorbing box, so that the welding positions of the energy absorbing box and the mounting plate body are determined. Clamping is reliable, rapid and accurate, and efficiency is improved greatly.

The invention discloses a crankshaft multi-angle oil hole drilling clamp. A crankshaft supporting seat of each crankshaft clamping mechanism is provided with a groove; a gland is arranged above the groove; two ends of the gland are movably connected with the crankshaft supporting seat respectively; a clamp body is uniformly and circumferentially provided with six rotating pin holes and two rotating screw holes taking a bearing hole of the clamp body as a center; six screw holes corresponding to the rotating screw holes, pin holes corresponding to the rotating pin holes and small-angle adjustment screw holes are arranged around a spindle hole of an angle adjustment disc; a circle center-connecting line of two mutually symmetric small-angle adjustment screw holes passes through the circle center of the spindle hole, and adjacent circle center-connecting lines form an included angle; an orthogonal surface of an orthogonal positioning block is provided with two holes of which the circle center-connecting line is a horizontal line; the orthogonal positioning block is arranged together with the angle adjustment disc and a supporting base; the angle adjustment disc is between a positioning supporting seat and one side of the clamp body; the crankshaft clamping mechanisms are symmetrically arranged at two ends of the other side of the clamp body; and an orthogonal slider positioning mechanism is arranged between two crankshaft clamping mechanisms.

The invention relates to an on-line automatic assembly device for an H-shaped steel with a corrugated web and belongs to the field of mechanical equipment. The device disclosed by the invention comprises a portal, a runoff table, a hydraulic clamping system, an automatic spot welding machine, hydraulic power and a control system, wherein the hydraulic drive clamping system consists of a corrugated web, flange plates and an assembled H-shaped steel clamping device, the corrugated web and the flange plates are clamped in an up and down corresponding mode, the assembled H-shaped steel is clamped from two sides in a left and right corresponding mode, after clamping and assembly, spot welding is carried out with the automatic spot welding machine, and the spot-welded H-shaped steel is output from the station along with the runoff table of the H-shaped steel with the corrugated web. The on-line automatic assembly device disclosed by the invention has the outstanding characteristics that the hydraulic clamping device and the runoff table are matched concertedly and operated in balance, for example, a hydraulic clamping roller row and a non-started state transmission roller row constitute the H-shaped steel clamping device, a transmission roller row and a non-started state hydraulic clamping roller row constitute the runoff table, and double functions and two effects are realized, so that the purpose of the on-line automatic assembly device is successfully achieved by accurate and balanced coordination.

A micro-adjustable parallel bench vise includes a slide holder having a top dovetail rail, a vise body having a bottom dovetail groove coupled to the dovetail rail of the slide holder and holding a fixed jaw member, a screw holder slidably mounted in the top side of the vise body, a screw rod threaded into the screw holder and rotatable to move the screw holder relative to the vise body. When multiple vise bodies are mounted on the slide holder in parallel, they are micro-adjustable to hold a workpiece or multiple workpieces precisely in position.

A method and apparatus for clamping an electrode tube in an EDM drill equipment is incorporated with an elastic seal and a collet. The method providing an insert having a through hole disposed at the center to concentrically accommodate and restrict the elastic seal, placing the insert into the collet, and inserting the electrode tube in the insert and the elastic seal, tightening the nut to the spindle to clamp the electrode tube and passing the EDM machining current from the spindle to electrode tube. The apparatus includes an insert having a retaining ring to restrict an elastic seal, a through hole to admit insertion by the electrode tube. The insert of the above method and apparatus comprises a guiding pipe to be secured in the collet, and a tapered guide hole interconnecting with the through hole to facilitate insertion of the electrode tube. Optional slots are provided at the lower portion of the guiding pipe.

The invention relates to an intelligent steel coil clamp in the technical field of intelligent unmanned crane scheduling systems for steel coil yards. The intelligent steel coil clamp comprises a clamp body and swing mechanisms, wherein a width detection limit switch and a planar linear bearing are installed on one clamping arm of the clamp body; each swing mechanism is connected with the corresponding clamping arm through a pin shaft; a slide plate is installed in each swing mechanism; each slide plate is located between a steel coil and the corresponding planar linear bearing; and when the steel coil is clamped by the clamping arms to enable the swing mechanisms to rotate around the pin shafts to trigger the width detection limit switches, one end part of the steel coil jacks the slide plates, and the steel coil moves downwards along the planar linear bearings with the slide plates until the clamping arms hook an inner ring wall of the steel coil. The intelligent steel coil clamp disclosed by the invention has the following beneficial effects: the stability of the clamp is improved through connection between hanging shafts and a double-end hook, and rolling friction is formed through the slide plates and the planar linear bearings to ensure the quality of the end part of the steel coil; and the clamp is simple in structure, fast and convenient to operate, and low in cost, and thereof is capable of accurately clamping the steel coil and avoiding damage to the steel coil.

Apparatus disclosed herein implement a fast transient precision current limiter such as may be included in an electronic voltage regulator. The current limiter includes two current sense element/current clamp control loops. A fast response time control loop first engages and clamps a current spike. A precision control loop then engages to more accurately clamp the output current to a programmed set point. The precision clamping loop includes an inner loop to linearize the precision current sense element. The inner loop forces the drain-to-source voltage (VDS) of the precision sense element to track the VDS of the regulator pass element. A more precise clamping operation results. Overall speed is not sacrificed as the fast response time clamping loop operates in parallel to protect circuitry while the precision clamping loop engages.

The invention discloses a clamping and machining method capable of guaranteeing the machining accuracy of an aluminum profile frame. One right angle of the rectangular aluminum profile frame is clamped firstly, a half length of an X-direction aluminum profile frame bar and a half length of a Y-direction aluminum profile frame bar at the right angle are cut, then the other three right angles of the rectangular aluminum profile frame are respectively clamped and cut, and finally cutting of the whole rectangular aluminum profile frame is completed. According to the method, the mode of clamping the whole rectangular aluminum profile frame and then cutting the rectangular aluminum profile frame in the past is changed into the clamping and machining mode of separately clamping the four angles and cutting the clamped angles after the angles are clamped, rectangular aluminum profile frames of different tolerance can be machined, frames of different dimensional tolerance can be accurately clamped and completely attached to the standard, and the yield can be greatly increased.

The invention discloses a rotary-forging forming and feeding device for an internal thread pipe. The device comprises a feeding mechanism and a central spindle actuating mechanism, wherein a lower guide rail surface of a feeding table in the feeding mechanism is matched with an upper guide rail surface of a guide rail; the main shaft of the feeding table is axially supported by a thrust bearing; a lower guide rail surface of a central spindle feeding table in the central spindle actuating mechanism is matched with the upper guide rail surface of the guide rail; the guide rail is mounted on a device body; a workpiece and the central spindle are both axially driven by a servo motor and a ball screw nut pair and both can freely rotate in circumferential direction; the thread of an internal thread pipe is formed by the rotary forging under the self-guiding action of the thread on the central spindle; the central spindle is in threaded connection with a pull rod through a core mold, and bears axial tension in the forging process and bending and deformation can be avoided. By the adoption of the device disclosed by the invention, distortion and deformation caused by the torque effect onthe workpiece during rotary forging can be avoided, and the workpiece forming precision is improved; in addition, the device has advantages of simple structure, high control precision, good stability, strong applicability and the like, and is convenient to operate.

In a steering column device, a locking shaft is disposed on a vehicle front side relative to an operating shaft for an operating lever in parallel to the operating shaft. On the locking shaft, a cam member is disposed which is configured to press a locking member against a locked member via a guiderail in such a direction as to engage the locking member with the locked member. On the other hand, on the operating shaft, a linking member is disposed which is configured to bring the cam member into a state where the locking member and the locked member are disengaged from each other when the operating shaft is moved to an unlock position.

The invention discloses an air tightness test device. The device comprises a feeding assembly which is installed on a bottom plate, and is provided with a feeding carrier used for conveying a product to be subjected to air tightness detection, a detection assembly which is mounted on the bottom plate, and a discharging assembly, wherein the product on the feeding carrier is carried into a detection station of the detection assembly through a carrying manipulator moving in space so as to carry out air tightness detection on the product; and the discharging assembly is installed on the bottom plate, the discharging assembly comprises a qualified product recycling assembly and an NG product recycling assembly, and the carrying manipulator carries products subjected to air tightness detection to the transfer carrier. The carrying module moving in the space carries products with qualified airtightness detection on the transfer carrier to the qualified product recovery assembly, and the carrying module carries products with unqualified airtightness detection on the transfer carrier to the NG product recovery assembly. According to the invention, batch testing can be carried out and the testing efficiency is high.

The invention relates to a centering and clamping assembling machine for H-shaped steel of corrugated web plates, and belongs to the field of machining equipment. A flange plate centering and clamping mechanism of each centering and assembling device consists of a linkage long shaft, a connecting rod clamping mechanism and a longitudinal oil cylinder, wherein the linkage long shafts longitudinally penetrate in a clamping rack; the connecting rod clamping mechanisms are connected to the inner side of the clamping rack at intervals through a bottom plate; center shafts of the connecting rod clamping mechanisms are correspondingly connected with the linkage long shafts; the longitudinal oil cylinders are arranged at the head end of the clamping rack; flexible ends of the longitudinal oil cylinders are connected with the linkage long shafts; flange plates which are turned upwards in the connecting rod clamping mechanisms via a turning-up device are clamped by driving the linkage long shafts to longitudinally move in the clamping rack; and the two centering and clamping devices move relative to a web plate conveying device, so that the flange plates and the corrugated web plates are centered and clamped. The centering and clamping assembling machine for the H-shaped steel of the corrugated web plates is simple in structure and easy to operate, and is applicable to centering and clamping assembly on the corrugated plates with different sizes; stable centering and clamping on the flange plates in an assembling process is effectively guaranteed; and the assembling quality and the production efficiency on the H-shaped steel of the corrugated web plates are improved.

The invention provides an automatic loading-unloading device of a machine tool, and belongs to the technical field of a machine, and solves the problems for more accurately and stably grabbing a workpiece by virtue of a pneumatic claw. The automatic loading-unloading device comprises a connecting plate, a telescopic air cylinder, a pneumatic claw air cylinder and a pneumatic claw connected to the pneumatic claw air cylinder, wherein a hinge circular hole and at least one arc hole are formed in the connecting plate; the center of an arc line of each arc hole in the length direction is concentric to that of the hinge circular hole; a positioning part I is arranged in the hinge circular hole; a positioning part II is arranged in each arc hole; an installation block is positioned on the connecting plate by virtue of the positioning part I and the positioning part II; the installation block can rotate around the center of the hinge circular hole relative to the connecting plate, so that the positioning part II slides along the arc hole; the pneumatic claw comprises a claw head I and a claw head II; the inner side surface of the claw head I is provided with a flat clamping surface I; the inner side surface of the claw head II is provided with a V-shaped clamping surface II which is concaved inwards; the position of the clamping surface I corresponds to that of the clamping surface II, so that the pneumatic claw more accurately and stably grab the workpiece.