50results about How to "Avoid uneven tension" patented technology

The invention provides a loop tension control method and device. The method includes the steps of detecting preparation state signals of a plurality of loop bottom rollers, generating instruction signals for driving the loop bottom rollers to participate in tension control when determining that the preparation state signals of the loop bottom rollers are successfully prepared, calculating first torque compensation of the loop bottom rollers and second torque compensation of loop bottom roller drive motors according to the instruction signals, setting torques of the loop bottom rollers according to the first torque compensation and the second torque compensation, sending the torques of the loop bottom rollers, and controlling the torque output of the loop bottom roller drive motors according to the torques of the loop bottom rollers so that the tension non-uniformity of loops can be avoided. Thus, the technical problem that in the prior art, due to the fact that the loop double-tower tension difference is too large, strip steel slides and gets loose is solved.

The invention relates to a battery cell clamping and connecting mechanism. The battery cell clamping and connecting mechanism is characterized by comprising a first bottom plate, a clamping jaw motion mechanism and a stretching motion mechanism, wherein two second bottom plates capable of doing a relative motion are arranged on the first bottom plate in a fore-and-aft symmetry manner; the clamping jaw motion mechanism comprises two clamping jaw motion mechanism units symmetrically arranged on the two second bottom plates; each clamping jaw motion mechanism unit comprises a left clamping jaw and a right clamping jaw that clamp the left and right ends of a battery cell; the stretching motion mechanism comprises a stretching driving apparatus mounted on the first bottom plate; and the power output end of the stretching driving apparatus is connected with the two second bottom plates for enabling the second bottom plates to do the relative motion, so that the two clamping jaw motion mechanism units pull the clamped battery cell to be flat. According to the battery cell clamping and connecting mechanism, the round battery cell is pulled to be flat to obtain a flat battery cell, so that the problems of low winding efficiency of the flat battery cell and non-uniform tension force during winding of the flat battery cell in the prior art are avoided and the battery cell quality is improved.

The invention discloses a machining device and method for a double-layer casing of an aero-engine. The device comprises an end surface gland, a shell, an inner sleeve, movable tensioning blocks, an air bag, a supporting rod, supporting arm nuts, supporting arms, a connecting seat, a ball head guiding rod, an inner hole fixing claw, an outer stand column, a transverse top head and a pressing plate.A turning and milling compound machining method is adopted, when an inner hole and an end surface are turned, the mode that an outer supporting is matched with the air bag for tensioning is adopted,and when an outer boss is milled, the mode that an inner supporting is matched with the air bag for tensioning is adopted; and according to the machining device, the high-quality and high-efficiency machining of the similar thin-wall double-layer casing can be achieved, and it is ensured that the circular degree of the casing meets the requirement.

The invention discloses a gravity tensioning device of a belt conveyor, and relates to the field of belt conveyors. The gravity tensioning device of the belt conveyor solves the problems that in the using process of the belt conveyor, with an existing tensioning mechanism, a belt of the belt conveyor can not be tensioned all the time, and use of the belt conveyor is seriously influenced because of instability of the tensioning state of the belt. The gravity tensioning device of the belt conveyor comprises a machine frame, a steel wire rope, a first turning pulley, a second turning pulley, a third turning pulley, a weight box, a gravity tensioning frame, a sliding rod and a hollow sliding rail. According to the gravity tensioning device of the belt conveyor, due to the design of the weight box and the turning pulleys, the steel wire rope can have a horizontal tensile force on the machine frame so that the belt of the belt conveyor can be tensioned, meanwhile, the weight box can only slide along the sliding rod, it is avoided that the tensile force is not even because the weight box waggles, and the belt can be tensioned well. The gravity tensioning device of the belt conveyor is suitable for the field of belt conveyors.

The invention relates to a dyeing vat. The dyeing vat comprises a vat body (3) and a skein cage (2), the skein cage (2) is located in the vat body (3), the skein cage (2) comprises a circular cage body (8), a frame (4) and a power source (1) are arranged on the outside of the vat body (3), the power source (1) is arranged on the frame (4), a flange (7) is arranged at the upper end of the cage body (8), a locating shaft (5) is arranged in the middle of the bottom portion of the outside of the cage body (8), and the power source (1) is connected with the cage body (8) through the flange (7) at the upper end of the cage body (8). The skein cage can be driven by the power source to rotate around an axis of the locating shaft, yarns and the dyeing vat relatively move in the dyeing vat, dyeing time is greatly saved, dyeing effects are improved, production efficiency is greatly improved, and rotation of the skein cage enables liquid such as dye liquor to be stirred, so that yarn dyeing is even, product quality is unified, problems such as uneven tensile force borne by yarn materials are avoided, and the product quality is good.

The invention relates to the technical field of impregnating agents, and discloses a film forming agent suitable for glass fibers, an impregnating agent comprising the same, and a preparation method and applications of the impregnating agent. The film forming agent comprises emulsified bisphenol A type epoxy resin and polyester type polyurethane. Through the emulsification effect of a surfactant, the interfacial energy of a system is reduced, the stability of epoxy resin emulsion is improved, and thus the function of the epoxy resin emulsion can be better exerted. The polyester polyurethane film forming agent has a large molecular weight and a strong yarn-wrapping performance and easily forms a compact film on the surface of glass fibers, thus the glass fibers are isolated from the external environment, water will not enter the cracks of the glass fibers, the elasticity and wear resistant performance of yarns are improved, the anti-fatigue performance of yarns is strengthened, at the same time, the bundling force is high, and the phenomenon of yarns such as natural draping, non-uniform tension force, and the like, is effectively relieved.

The invention relates to the field of wood board bending equipment, in particular to a wood board bending method. The wood board bending method comprises the steps that a wood bending machine is prepared; a wood board is mounted; a hydraulic cylinder is started; a hydraulic cylinder output shaft is controlled to slowly extend and retract within the extension stroke being 2-4cm; the hydraulic cylinder output shaft is controlled to retract 30-50cm at a time; and the bent and formed wood board is taken out. When the hydraulic cylinder output shaft extends, racks make linear motion downwards, gears engaged with the racks rotate towards the racks, one ends of bundled steel wires are fixed to the gears, the other ends of the bundled steel wires are fixed to the wood board, the gears tighten the bundled steel wires when the gears rotate towards the racks, and the bundled steel wires are shortened so that the wood board is attached to a mould till the wood board is stretched and then is subjected to bending forming. With the implementation of the technical scheme, a bending forming failure is avoided due to the fact that the two ends of the wood board are stressed sufficiently, and the wood board is saved.

Provided is a unilateral wire loosening elimination method of cutting wire electrodes through reciprocating wire moving electrical discharge wires. The unilateral wire loosening elimination method of cutting the wire electrodes through the reciprocating wire moving electrical discharge wires is characterized in that a frequency conversion device is used for controlling forward and reverse rotation speed of a wire storage cylinder, forward and reverse rotation differential rotation of the wire storage cylinder is achieved, tensile difference of forward and reverse moving wire electrodes of the wire electrodes cut by high-speed reciprocating wire moving electrical discharge wires is eliminated, the phenomenon of 'unilateral wire loosening' is eliminated, and therefore machining accuracy and surface roughness are improved, and service life of the wire electrodes is prolonged. The unilateral wire loosening elimination method of cutting the wire electrodes through the reciprocating wire moving electrical discharge wires has the advantages of being easy in implementation method, simple in structure, and strong in practicability.

The invention provides an adhesive tape joining method and an adhesive tape joining apparatus. An adhesive tape is joined onto an annular frame in a state that a tensile force is applied onto the adhesive tape in the length and width directions of the adhesive tape, wherein the adhesive tape is band-shaped and the self-width of the adhesive tape is greater than the outline width of the annular frame. A pair of covers are used to clamp the adhesive tape between the annular frame and a semiconductor wafer, thereby forming a chamber. The pressure of one space formed by separation via the adhesive tape (T) and accommodating the wafer is decreased to be lower than the pressure of the other space, so that the adhesive tape (T) is joined onto an annular convex part formed in the periphery of the wafer and a flat plane in the inner side of the annular convex part.

The invention relates to an underground pipeline measuring device and an application method thereof. The underground pipeline measuring device is used for measuring a pipeline trend in a pipeline, andcomprises a traction machine and a measurement machine, wherein the traction machine comprises a chassis and a traction part; the traction part is arranged on the chassis through a lifting device; the chassis is connected with the traction part through a cable; a power supply module, a power module, a lifting unit, a switch, a speedometer and a positioning module are arranged on the traction machine; an inertia measurement module, a human-computer interaction module, a central processing module and a storage module are arranged in the measurement machine; and the measurement machine comprisesan outer barrel, an inner barrel and an extending barrel. The measuring device provided by the invention is long in measuring range, good in waterproofness, and high in accuracy.

A twisted cable includes a main body which includes a central filament and a plurality of twisted filaments. The twisted filaments are arranged around the central filament and include six first filaments, twelve second filaments, and eighteen third filaments from the central filament outward. The cross-section of each first filament is the same with the one of each second filament. The cross-section of each first filament is larger than the one of the third filament but smaller than the one of the central filament. The twisted filaments are twisted around the central filament. As a result, the twisted cable of the present invention has improved structure strength, appropriate toughness, and smaller amount of longitudinal deformation.

The invention relates to the field of wood bending equipment, in particular to a wood bending machine. The wood bending machine comprises a machine frame. The top of the machine frame is provided witha hydraulic cylinder. The hydraulic cylinder comprises a vertical-downward hydraulic cylinder output shaft. The lower part of the machine frame is provided with a mold. The curved surface of the moldfaces downwards and forms a wood bending channel with the bottom of the machine frame. Vertical racks are arranged symmetrically and fixedly on the two sides of the hydraulic cylinder output shaft. The machine frame on the two sides of the hydraulic cylinder output shaft is rotationally connected with gears correspondingly. Each gear is engaged with the corresponding rack on the same side. Each gear end face is fixedly connected with a wire bundle which is tightened when the gear rotates toward the corresponding rack. The lower end of each wire bundle is fixed to one end of same side wood. Wire bundle fixing sleeves are arranged symmetrically and fixedly on the machine frame between the mold and the gears. The upper ends of the wire bundles penetrate through the wire bundle fixing sleeves. By using the technical scheme, the two ends of the wood are pulled by the wire bundles, so that the two ends of the wood fails to being bent due to the lack of force, and the wood is saved.

The invention discloses a corn sheller. A corn is shelled through the rotation of two rotating rolls which rotate in opposite directions and friction force; meanwhile, the corn sheller comprises a compression mechanism which adapts to corns with non-uniform diameters. The corn sheller is provided with a core returning mechanism which can automatically push the shelled corn out of a shelling mechanism automatically, so that an operation process is greatly simplified, and the manpower cost is reduced; meanwhile, the corn sheller has the advantages of simple structure, easiness in part processing and the like, and has wide social benefits and outstanding technical progress.

A multi-functional curved board to be used when working in standing position and for working when sitting down as a support for feet and generally for maintaining muscle strength, the multi-functional curved board having at least one curved body (1). The body (1) comprises at least one counter-curve means (3). One surface (1b) of the body is curved outwards and the counter-curve means are fastened to a surface (1a) opposite this surface (1a) adjacent the end sides (1d) of the body (1) and the counter-curve means are curved outwards from the opposite surface of the body (1).

The invention discloses an externally-tightening and quick-changing hobbing tool for shafts. The externally-tightening and quick-changing hobbing tool comprises a base installed on a work plane of a machine tool. A transition pull plate and an adhesion tightening sleeve are sequentially installed on the base. The transition pull plate is connected to a pull rod of the machine tool and driven by the pull rod of the machine tool to move downwards or upwards. The adhesion tightening sleeve is matched with the transition pull plate to tighten or loosen work-pieces. According to the characteristics that power takeoff shafts are various and production change is frequent, the externally-tightening and quick-changing hobbing tool is designed. According to the tool, serialization design is carried out on the adhesion tightening sleeve and a centre, the adhesion tightening sleeve and the centre are convenient to change, and the design range of clamps for new shaft parts in future can be expanded.

The invention provides a rail transit large-tonnage pre-tensioning method prestressed concrete U type beam and a tensioned bed thereof. The tensioned bed comprises a bottom plate, a strip foundation arranged on the bottom plate and used for supporting the rail transit large-tonnage pre-tensioning method prestressed concrete U type beam, force transmission beams arranged on the two sides of the bottom plate, movable end steel cross beams arranged at one ends of the force transmission beams, fixed end steel cross beams arranged at the other ends of the force transmission beams and a jack arranged between the movable end steel cross beams and the force transmission beams. The tensioned bed has the beneficial effects of being simple in structure, clear in stress, being free of piling, high in construction speed, capable of greatly saving the construction materials and the like.

The invention discloses an anti-vibration core expanding tool with a locking function. The anti-vibration core expanding tool comprises a tool bottom plate, a guide rail mechanism and core expanding movable blocks. The guide rail mechanism is arranged on the tool bottom plate. The core expanding movable blocks are arranged in the guide rail mechanism. An expanding sleeve mechanism is arranged between the tool bottom plate and the core expanding movable blocks. An anti-vibration mechanism with the locking function is further arranged between every two adjacent core expanding movable blocks and the tool bottom plate. By the adoption of the anti-vibration core expanding tool, the problem that in the high-speed running process, due to uneven stress, vibration and deformation are generated, and consequently the deformation amounts of different positions are different can be effectively solved, expanding force applied to the inner side wall of a workpiece to be machined is even, and the anti-vibration core expanding tool has the beneficial effects of being simple in structure, low in production cost, convenient to operate, high in shaping speed, high in practicability and suitable for application and popularization.

The invention discloses a paper deviation rectifying device and a deviation rectifying method. The paper deviation rectifying device comprises a rack; at least one deviation rectifying steel roller set used for paper to bypass is vertically arranged on the front side of the rack, electric eye deviation rectifying devices used for paper to pass and detecting whether the paper deviates or not are further arranged on the deviation rectifying steel roller sets, and movable supporting seats are arranged at the two ends of the deviation rectifying steel roller set; and the movable supporting seats are connected with sliding blocks through bearings, two guide columns penetrate through the sliding blocks, pushing air cylinders are further arranged on the rack, and the pushing ends of the pushing air cylinders are connected with the sliding blocks. The paper deviation rectifying device has the beneficial effects that during deviation rectifying, the pushing air cylinders push the sliding blocks, the deviation rectifying steel roller sets are forced to turn over relative to the bearings along with movement of the sliding blocks, the deviation rectifying steel roller set is inclined integrally, the paper is driven to rectify deviation, and the problem of uneven tension is well solved.

The invention discloses a synchronous translation mechanism of a segment rounding device. The synchronous translation mechanism comprises a supporting beam, a segment assembling machine, the segment rounding device, a first driving part and a second driving part, wherein the supporting beam is arranged on a machine body in a transverse translation mode, the segment assembling machine is arranged at one longitudinal end of the supporting beam, the segment rounding device is arranged at the other longitudinal end of the supporting beam, the first driving part is arranged on the transverse left side of the supporting beam, connected with the segment rounding device and used for driving the segment rounding device to move in the longitudinal direction of the supporting beam, the second driving part is arranged on the transverse right side of the supporting beam, connected with the segment rounding device and used for driving the segment rounding device to move in the longitudinal direction of the supporting beam, and the output state of the first driving part and the output state of the second driving part are synchronous. According to the synchronous translation mechanism, the segment rounding device can be prevented from deflecting in the steering process of the shield tunneling machine, the phenomenon that the supporting pressure on segments is not uniform is avoided, and meanwhile abrasion of a base plate of the segment rounding device is reduced. The invention further discloses the shield tunneling machine. The shield tunneling machine has the advantages.