23 results about "Shear angle" patented technology

The invention relates to a shearing performance testing jig and device.The shearing performance testing jig comprises at least one jig body, the jig body comprises a connecting part and a plurality of sample fixing parts, and the ends, away from the connecting part, of the sample fixing parts are provided with shearing faces; the shearing surfaces of the two opposite sample fixing parts of the two jig bodies used in cooperation are parallel to each other, the test included angles corresponding to at least part of the sample fixing parts are different, and the test included angles are the included angles between the planes where the shearing surfaces are located and the first direction. According to the shearing performance testing jig, the plurality of sample fixing parts are arranged in the jig body, each two opposite sample fixing parts fix one shearing sample, and the included angles between the planes where the shearing surfaces of at least part of the sample fixing parts are located and the stretching direction are different, so that the shearing performance of the plurality of shearing samples can be tested at a plurality of shearing angles; the influence of other variables except the shearing angle on the test result is reduced or avoided, the test accuracy is improved, and the test efficiency is improved.

The utility model discloses an adjustable shear plate angle locking mechanism, which belongs to the technical field of shear plates and comprises a machine body, supports are fixedly mounted on the inner walls of two sides of a vertical section of the machine body, lower blades are fixedly mounted at the top ends of the two supports, and a discharge port is formed in the lower end of the outer wall of the vertical section of the machine body. And the support and the lower blade are both located at the upper end of the top end of the discharging opening, and a rotating plate is rotationally installed at the top end of the machine body. After the shearing angles of the rotating plate, the mounting seat and the upper blade are reached, the second driving motor works, so that the two I-shaped frames are far away from each other and extrude the inner walls of the upper end and the lower end of the limiting frame, the inclination angle of the upper blade is locked, and the inclination stability of the upper blade during shearing is ensured; and a plurality of locking blocks are arranged on the outer walls of the opposite ends of the two I-shaped frames of each set and the inner walls of the upper end and the lower end of the limiting frame, the two sets of locking blocks are connected in a clamped mode, the locking effect on the rotating plate after rotation is further enhanced, and then the inclination stability of the upper blade is guaranteed.

The utility model provides a quick extrusion type flaring-free pipe sleeve, which relates to the technical field of aviation hydraulic pipeline sealing joints, and comprises an outer contour and an inner contour, the outer contour is provided with a first arc, and a first conical surface, a second conical surface and a third conical surface on two sides of the first arc; the first conical surface is tightly attached to the 24-degree conical surface under the action of the 24-degree conical surface rigid body, and a sealing area is formed. The rolling type flaring-free pipe sleeve has smaller size and lighter weight, can be connected with a guide pipe in a narrow space, and is reduced in weight by 14.5%-21.2% and shortened in length by 23.3%-27% compared with an existing rolling type flaring-free pipe sleeve; the first conical surface and the second conical surface are in elastic-plastic deformation under the action of a 24-degree conical surface rigid body, the outer surface of the first conical surface changes gently, the deformed outer surface is more attached to the 24-degree conical surface, and sealing connection higher in strength and better in stability is formed. The multiple annular grooves are provided with shear angles, so that the connecting strength and the fitting degree of the pipe sleeve and the guide pipe are improved, and oil leakage and oil seepage faults of a hydraulic pipeline are reduced.

The invention relates to the technical field of metal processing machinery, in particular to a numerical control gantry cut-off machine capable of changing the cutting angle, which comprises a main oil cylinder and an auxiliary oil cylinder which are mounted in the middle of a rack, and a tandem oil way is arranged between the main oil cylinder and the auxiliary oil cylinder; an upper tool rest is installed in the middle of the rack, two sets of connecting bases are fixedly installed at the upper end of the upper tool rest, and ball heads matched with the connecting bases are installed at the output ends of the main oil cylinder and the auxiliary oil cylinder; a main oil cylinder upper cavity and a main oil cylinder lower cavity are formed in the main oil cylinder, and an auxiliary oil cylinder upper cavity and an auxiliary oil cylinder lower cavity are formed in the auxiliary oil cylinder. According to the numerical control gantry cut-off machine capable of changing the shearing angle, the problems that when the shearing angle of an existing cut-off machine is fixed in the using process, when a shearing material is subjected to unbalance loading, a tool rest can be clamped by a guide rail, and when a thin material is sheared, the angle cannot be adjusted, so that the shearing stroke is lengthened, the shearing speed cannot be increased, and the shearing efficiency is reduced can be solved.

The application discloses a kind of anti-cracking performance evaluation method and computer equipment for asphalt stress absorbing layer, it is related to pavement engineering technical field, the method includes: stress absorbing layer test piece is carried out oblique shear test, and index information in the process of oblique shear test is collected, the index information includes shear angle, stress load, vertical displacement, lateral displacement, interlayer dislocation displacement and stress absorbing layer adhesion force;According to the index information, the interlayer adhesion coefficient and interlayer stress absorbing coefficient of the stress absorbing layer test piece are calculated;According to the interlayer adhesion coefficient and interlayer stress absorbing coefficient, the anti-cracking performance of the stress absorbing layer test piece is evaluated.The application can introduce the interlayer adhesion coefficient and interlayer stress absorbing coefficient of stress absorbing layer test piece, and accurately evaluate the anti-cracking performance of asphalt stress absorbing layer.

This invention provides a modeling method for the shear force of a crescent-shaped shear blade, comprising the following steps: 1) expanding and parameterizing the theoretical shear blade arc into a function based on its formation process; 2) calculating the slope of each point on the arc; 3) determining the shear angle at each point on the arc based on the slope in step 2); 4) calculating the Nosari shear force using the shear blade shear's Nosari formula; 5) calculating the shear force at each point on the arc based on step 4); and 6) identifying the point with the maximum shear force within the range of the arc's values ​​as the design basis for the crescent-shaped shear blade. The data used in this modeling process are readily available, thus avoiding the impact of measurement errors on the shear force data, resulting in high calculation accuracy and precision. This invention solves the modeling problem for calculating the shear force of a crescent-shaped shear blade, transforming a complex model into a simple one, saving time, and offering low cost and high flexibility.

The utility model belongs to the technical field of bridge detection, and particularly relates to a device for rapidly measuring the shearing angle of an in-use service bridge rubber support. The angle measuring device comprises a measuring frame, an angle measuring protractor and an angle measuring support rod, the measuring frame is a movable frame with a rotatable frame, and the angle measuring protractor is connected to the measuring frame; the two ends of the angle measurement supporting rod are rotationally connected to the measurement frame, and one end of the angle measurement supporting rod is located at the center point of the angle measurement protractor. The device is simple and convenient to operate and high in measurement precision. In the using process, reading errors caused by different observation angles are avoided. Due to the design of the measuring frame and the horizontal indication level bubble, the size of the bottom fixed measuring feeler lever and the size of the top movable measuring feeler lever can be designed according to the distance between an operator and a bridge pier and a bridge abutment top face support, and the operator can conveniently measure the shearing angle of the support in the limited space of a bridge in use.

An iron tower component hydraulic corner cutting self-adaptive limiting frame comprises a pressing die and a positioning die, the limiting frame is arranged on the positioning die, the limiting frame comprises an abutting block, an opening of the positioning die is in a U shape, an L-shaped notch is formed between the abutting block and the positioning die, and angle steel can be inserted into the L-shaped notch. The abutting block abuts against the angle steel after the angle steel enters the positioning die, and the abutting block retreats to the other end face after the angle steel is sheared by the pressing die. The angle steel shearing device has the advantages that geometric constraint is formed through matching of the U-shaped opening and the L-shaped notch, the three-dimensional positioning accuracy of angle steel in the shearing process is guaranteed, and position deviation can be reduced compared with a traditional manual positioning mode.

The present application relates to a kind of micro drill cutting force modeling methods associated with cutting edge position and shearing stress, belong to mechanical processing technical field.The method first obtains material relevant attribute and tool parameter, then through Johnson-Cook constitutive model, the equation of shearing stress and tool rake angle, shearing angle, friction angle, cutting speed is established, then the numerical value of shearing stress is obtained by solving, finally according to shearing stress, the cutting force generated by main cutting edge and horizontal blade is obtained, and finally total cutting force is obtained.The cutting force modeling method considering the influence of workpiece material shearing stress of cutting edge position provided by the present application considers the change of workpiece material attribute and cutting force coefficient in different cutting positions, realizes the accurate prediction of micro drill cutting force.

A scissor lift table (1) with a base (2) and a working section (3) which is height-adjustable relative to the base (2), with at least one scissor mechanism (4) arranged between the base (2) and the working section (3), which comprises two scissor arms (5, 6) pivotally connected to each other in a cross-like manner, wherein a first end region of a first scissor arm (5) is pivotably mounted on the base (2) and a first end region of a second scissor arm (6) is pivotably mounted on the working section (3) and the respective opposite end regions are guided longitudinally displaceably on the working section (3) and on the base (2), and with a lifting drive device (7), wherein the lifting drive device (7) comprises two threaded spindles (9, 10) arranged parallel to each other, on which at least one spindle nut (11) is arranged, wherein the spindles (9, 10) can be driven together by a drive, so that the spindle nuts (11) relative to the spindles (9,10) are adjustable in the axial direction, wherein the spindle nuts (11) are mounted in a bearing housing (13) in a rotationally fixed manner, and wherein at least one engagement element is provided which is force-transmittingly coupled to at least one spindle nut (11) and force-transmittingly connected to a linear drive means which has a substantially horizontal section and a section extending in the stroke direction of the working part (3) between the base (2) and the working part (3) and is supported at least at one end on the base (2) and / or on the working part (3), such that an axial adjustment of the spindle nuts (11) causes a displacement of the engagement element relative to the spindles (9, 10) and thereby a change in the shear angle and a height adjustment of the working part (3).

To provide a method and an apparatus for manufacturing a hollow bent part having a small bending radius and an acute apex angle of a bent part. Another object of the present invention is to provide a hollow bent part manufactured by the method and apparatus for manufacturing a hollow bent part.SOLUTION: In the method and apparatus for manufacturing a bent hollow component, the hollow blank Pm is supported at the first position A while being fed in the feed direction along the longitudinal direction of the hollow blank Pm, the hollow blank Pm is partially heated at the heated portion at the second position B, the hollow blank Pm is cooled at the third position C, and the hollow blank Pm is held at the holding position after passing the third position C and moved in the two-dimension direction or the three dimensional direction to apply a shear force to the heated portion to form the shear-bent portion SB. In the step of forming the shear bending portion SB, the shear angle θ of the shear bending portion SB is set to be more than 90 ° and less than 180 ° by moving the holding position including the moving speed component Vx in the direction opposite to the feeding direction.SELECTED DRAWING: Figure 1

This invention discloses a roadway sidewall support design method based on shear failure theory. Addressing the problem that existing suspension theories cannot explain the sidewall failure mechanism, it proposes that sidewall failure is essentially shear slip; by establishing shear angle... θ =45°- Φ / 2. Height of loose material in the tunnel roof h 1=( B +2 H tan θ ) / (2 f ), width of loose body in the side J = H tan θ, Determine the number of anchor bolts per row N = K ( G 1+ G 2) / ( T tan θ This method employs a core formula system to accurately calculate the number, spacing, and length of rock bolts in the ribbed wall. All parameters in this method are directly related to the mechanical properties of the surrounding rock. Through the principle of mechanical equilibrium, it accurately calculates the rock bolt support parameters for the roadway ribbed wall, conforming to the ribbed wall shear failure mechanism. The design results are consistent with engineering practice. This method not only explains the ribbed wall failure mechanism but also provides calculation results that are highly consistent with reality, demonstrating significant safety and economic benefits.

The utility model belongs to the technical field of modification machines, and particularly relates to a novel stirring blade of a modification machine, which comprises a paddle and a plurality of vertical paddle teeth arranged on the paddle, each vertical paddle tooth is provided with at least one shearing angle, at least one side of each shearing angle is provided with a guide shearing surface, and the guide shearing surfaces are used for scrubbing and material guiding. The paddle is provided with a plurality of circles of vertical paddle teeth which are arranged in the same circle center, the center points of all the vertical paddle teeth on the same circle are located on the same rotating circle, the cross section of each vertical paddle tooth is in a rectangular shape, and the connecting line of the diagonal lines of the vertical paddle teeth is tangent to the rotating circle where the center point of the vertical paddle teeth is located. The utility model provides a novel stirring blade of a modifying machine, which can greatly improve the shearing capacity and scrubbing capacity of products, particularly improve the scrubbing capacity for fine particles, and improve the flotation efficiency and the recovery capacity.

To provide a technology capable of reducing the load on a die when a high-strength soft magnetic foil material is press-punched and suppressing the height of burrs on the punched material. [Solution] A press processing device 10 is provided with a punch 12 and a die 14, and punches out a plate-shaped workpiece 18 transported between them by lowering the punch 12, and collects the punched material 20 as a product. The workpiece 18 is made of a high-strength soft magnetic foil material such as an iron-based amorphous alloy foil, and a shear 40 is attached only to the punch 12 side. This shear 40 is composed of a first edge E1 formed at the tip of the punch 12, a second edge E2 formed on the side of the punch 12, and an inclined surface 12a connecting the first edge E1 and the second edge E2, and the shear angle, which is the angle between the horizontal plane H tangent to the first edge E1 and the inclined surface 12a, is set within the range of 0.23 to 0.68 degrees.

The utility model provides a shearing angle regulator and multifunctional shears, which comprise a mounting seat detachably mounted on a shearing tool, the mounting seat is provided with a shearing plate and a U-shaped sleeve fixed on the end face of the shearing plate, the U-shaped sleeve is sleeved on a tool rest of the shearing tool, and the shearing plate corresponds to a blade of the shearing tool; the end face, deviating from the U-shaped sleeve, of the shearing plate is provided with an adjusting backup plate and / or a plurality of inclined grooves. The adjusting backup plate is rotationally installed on the shearing plate and used for rotationally adjusting the shearing angle of a to-be-sheared part. During shearing, a to-be-sheared piece is arranged in the inclined groove or one side of the to-be-sheared piece abuts against the adjusting backup plate, and the blade moves towards the shearing plate to shear the to-be-sheared piece. The multifunctional shear comprises a shearing tool body and a shearing angle adjuster detachably installed on the shearing tool body. According to the shearing angle regulator and the multifunctional shear, the defect that an existing shearing tool is single in function is overcome.

The application provides a shape and property control process method of DS rolled plate, in which a constant misregistration shearing angle is kept in rough rolling DS rolling process, plate thickness is controlled by X-ray, hardness tester and rolling mill springback model, rough rolling DS rolling force stability control is realized by working roll bending and support roll crossing, the misregistration shearing angle is accurately adjusted by setting model in finish rolling DS rolling process, a crown tester and a plate shape tester are installed and working roll crossing and working roll bending are used to improve plate crown and flatness. The application realizes accurate control of rolling shearing force by using DS rolling technology, greatly improves plate rolling strength and hardness, appropriately softens plate by using annealing process, increases plate toughness, greatly improves overall performance of the plate by using full-process DS rolling technology, realizes plate shape and thickness control after rolling, and realizes DS rolling shape and property integration.

The present application belongs to the technical field of composite mechanics and computational mechanics, and discloses a method and system for simulating deformation and fracture of interlaminar failure of a composite laminate.The present application establishes an intralaminar bending bond model for each ply of the composite laminate; introduces an interlaminar normal bond and an interlaminar shear bond between adjacent plies; determines the fiber bond bending micro-modulus, the matrix bond bending micro-modulus, the interlaminar normal bond parameters and the interlaminar shear bond parameters; implements surface correction on the interlaminar normal bond and the interlaminar shear bond; respectively determines whether the interlaminar normal bond and the interlaminar shear bond fail by using the interlaminar normal relative elongation and the interlaminar shear angle between material points; and performs numerical solution on the bending control equation.The present application adopts a bond-type near-field dynamics method, does not need to preset a crack propagation path or perform mesh reconstruction, and can naturally simulate the crack initiation, propagation and interlaminar delamination process.

The invention relates to the field of composite material mechanical property prediction, in particular to a composite material mechanical property prediction method considering two-dimensional woven fabric shear deformation. The method comprises the following specific steps: (1) dispersing a two-dimensional woven composite material into two layers of unidirectional composite materials, and endowing the unidirectional composite materials with a fiber direction according to a shear angle; (2) endowing the unidirectional composite material with material attributes based on an orthotropic constitutive model considering shear plasticity; (3) simulating a tensile deformation behavior, and obtaining a stress-strain curve; and (4) comparing with a tensile experiment result of the two-dimensional woven composite material, and calibrating plastic parameters of the constitutive model. According to the method, the tensile mechanical property of the composite material under any two-dimensional woven fabric shearing angle can be simulated and predicted.

The invention provides a shearing angle planning and control method for a roller flying shear. The invention relates to a method for planning the shearing angle of a roller flying shear, which comprises the following steps of: 1, taking a lower roller shaft as a positioning reference shaft, fixing a shear blade on a roller, and rotating around the axis of the roller; and step 2, region division. The invention further relates to a shearing control method of the roller flying shear. According to the method, a shearing area is set based on the shear blade overlapping amount and the spiral angle, synchronous areas are arranged on the two sides with the angle of the shearing area as the benchmark, the angle of a shearing acceleration area and the angle of a deceleration braking area are enlarged, functional area division in the 360-degree range is expanded to 580 degrees through process control, and clear area division is achieved; flying shear starting and braking impact loads are effectively reduced, and boundary information feedback is clear. According to the method for controlling the shearing angle of the roller flying shear, the purposes of improving the dynamic response performance of the flying shear and improving the control precision of the flying shear are finally achieved on the basis of solution of target input and correction in the buffer area.

The present invention relates to an electrode cutting device for all-solid-state batteries, the electrode cutting device, more specifically, comprising: an upper knife cutting part comprising an upper knife holder, an upper knife, and a coupling part; an upper knife adjustment part positioned on one side of the upper knife; and a lower knife, wherein the upper knife comprises a shear blade sloped at shear angle θ from one to the other end of the bottom edge, the shear blade comprising an upper knife landing part, and the ratio of the length of same to shear angle θ being 0.15-1 mm / °.

The utility model relates to shearing machine technical field discloses a kind of shearing angle adjusting mechanism of numerical control plate shearing machine, including adjusting frame, the both ends of adjusting frame are fixedly connected with guide block, the side surface of guide block is fixedly connected with bracket, the surface of bracket is slidably installed with mounting bracket, the inboard of mounting bracket is fixedly connected with mounting plate, the lower surface of mounting plate is fixedly installed with shearing cutter, the both ends of mounting bracket are equipped with arc plate, the upper surface of bracket is swing-connected in the arc plate, the outer surface side of arc plate is fixedly connected with half-toothed ring, the outer surface side of half-toothed ring is meshed with driving gear, the upper surface side of bracket is rotatably installed with driving gear, the one end of driving gear is combined with driving motor, to change the angle of shearing cutter, can also form product of different included angle by oblique shearing, it is convenient to control use, accurate and efficient.

The application discloses a method for predicting dynamic mechanical properties of tough difficult-to-machine materials based on milling processing, which comprises the following steps: firstly, a normal shear angle of a shear plane in an oblique angle cutting is solved by an iterative optimization method; (a) setting an initial value of the normal shear angle; (b) calculating an undeformed chip thickness, a tool instantaneous invasion angle, a cutting force component and a normal friction angle based on the initial value of the normal shear angle; (c) updating a calculated value of the normal shear angle; (d) calculating an error between the initial value and the calculated value of the normal shear angle, if the error is not within an allowable range, repeating steps (a)-(d) until the error is within the allowable range, and outputting a final calculated value as an optimized normal shear angle; and then, the optimized normal shear angle and other parameters are substituted into a correlation equation containing a fracture toughness, a yield strength and a viscous toughness to solve the fracture toughness G c of a workpiece material at a tool tip in the milling processing, a yield stress σ Y in a shear plane and a viscous toughness G a of chip sliding at a tool-chip contact interface.