103results about How to "Reduce torsional deformation" patented technology

The invention provides a precise milling processing method with a variable inter-row allowance for thin walled blades of difficult-to-process materials; four driving curved surfaces are obtained by cutting a blade root boundary surface and a blade tip boundary surface into a blade back curved surface and a blade basin curved surface; parameter lines with equal u on the driving curved surfaces are used as processing paths; a cutting row allowance for each processing path is set respectively; and finally processing on the four driving curved surfaces are completed circularly. The invention facilitates the improvement of the blade cross section position accuracy, facilitates the improvement of the blade surface profile tolerance, and facilitates the reduction of the blade torsional deformation; when compared with traditional vertical cutting with a constant allowance and spiral milling methods, the invention can solve the technical problems of large torsional deformation, poor profile precision, difficultly-controlled cross section position accuracy error, and the like, and can realize the high-efficient precise numerical control processing of thin walled blades of difficult-to-process materials.

The invention relates to a method for controlling the surface stress-strain field of a casing part based on a constant cutting force, and belongs to the technical field of aerospace numerical controlmachining. The control method includes the following steps: (1) importing a part model into a computer; (2) importing an original numerical control program into the computer; (3) importing machine tool information into the computer; (4) setting cutter parameters; (5) simulating a cutting force; (6) analyzing simulation data; (7) judging the stability of the cutting process; (8) judging whether thecutting process belongs to local run-out; (9) adjusting the original numerical control program: (10) interrupting the original numerical control program adaptively; (11) optimizing the cutting parameters of the numerical control program by segments; (12) outputting an optimal numerical control program; and (13) applying the optimal numerical control program for processing verification. The methodof the invention can be applied to the surface stress-strain field control of various integral casing parts, and has huge economic and social benefits.

The invention provides a thin-walled vane nine-point control variable-allowance milling method based on Newton interpolation. Modeling is carried out by utilizing a three-dimensional modeling software, and an auxiliary surface and a boundary surface are formed, so that a driving surface is determined by utilizing a section line lofting process. Cutter machining paths are generated according to the driving surface, and the machining allowance of each cutter position point on each machining path is determined by adopting a Newton interpolation method. Finally, vanes are cyclically processed according to symmetrical milling rules. Compared with a traditional longitudinal fixed-allowance cutting and spiral milling method, the thin-walled vane nine-point control variable-allowance milling method has the advantages that technical problems, such as large torsional deformation, low contour precision, poor section position tolerance and difficult error control, in the machining process can be solved; and by adopting a Newton interpolation process allowance fine adjustment method, surface quality can be more comprehensively controlled, and problems, such as large bending deformation, poor section position tolerance and low surface contour precision, in the machining process can be effectively solved.

The invention relates to an automatic welding device. The automatic welding device comprises rigid supporting seats, multi-claw chuck mechanisms, built-in flexible pneumatic piston rings, a rotary table bearing, an annular guide rail and a rotary driving mechanism, wherein the built-in flexible pneumatic piston rings are matched with storage tank drum segments; the multi-claw chuck mechanisms are connected to the rigid supporting seats through the rotary table bearing and the annular guide rail; the flexible pneumatic piston rings and the multi-claw chuck mechanisms are matched with the storage tank drum segments needing butt joint and friction stir welding for circular seams so as to form a rigid body, and the rigid body is driven by the rotary driving mechanism to rotate relative to the rigid supporting seats. According to the automatic welding device disclosed by the invention, the problems that, in the prior art, storage tanks are structural parts with big sizes and thin walls, so that the rigidity of the storage tanks is poor, and the storage tanks are difficult to fix and position are solved, and the automatic welding device has the beneficial effects that the dynamic stability of the welding process of the circular seams is guaranteed, and the welding quality is improved.

The invention aims at providing an auxiliary frame mounting point structure. The auxiliary frame mounting point structure can realize drop in a collision process and reduce harm on a passenger in a passenger compartment. The auxiliary frame mounting point structure comprises an auxiliary frame provided with a mounting support and a longitudinal beam. The auxiliary frame mounting point structure is characterized inthat an internal screw thread sleeve with the bottom end open is fixed on the longitudinal beam; the mounting support is composed of a tubular support body with the two ends open and a cap body fixedly arranged at the top end of the support body, gaps corresponding in position are formed in the front end of the cap body and the front end of the upper part of the support body, a guide slot connected with the gaps is formed in the cap body, and the guide slot extends along the length direction of an automobile; and the auxiliary frame is fixedly connected with the longitudinal beam by utilizing a bolt which penetrates through the support body and the cap body and is screwed into the internal screw thread sleeve, and an anti-drop part with the diameter larger than the width of the guide slot is arranged at the bottom end of the bolt. The auxiliary frame mounting point structure has the advantages that the auxiliary frame can drop in the collision process and harm done to a passenger can be reduced.

Laminate structures and methods of making laminate structures having overwrapped laminate edges which resist delamination and fraying or including one or more stabilizer laminates which afford greater radial and torsional rigidity in longitudinally slit tube structures.

The invention relates to a rotary cutting tool with a replaceable tool bit and a rotary cutting method and a tool bit mounting method thereof and belongs to the field of hole processing in machining industry. At present, a twist drill used for drilling is of an integrated structure, and the tool bit reaching the service life needs to be replaced integrally, so that the cost is relatively high. Ina drilling tool with the replaceable tool, as the tool bit is subjected to relatively great radial and axial actions in the drilling hole, the condition of no fine drilling as the tool bit shifts radially at the connection is avoided. According to the replaceable structure of the tool bit, the drilling tool at the connection of the tool bit is relatively weak, and the drilling tool matrix is weaker due to a design of a chip removal chute. According to the rotary cutting tool with the replaceable tool bit provided by the invention, the tool bit is detachably connected to a cutter bar and the connection of the tool bit and the cutter bar is a V-shaped locating surface, so that the rotary cutting tool is good in tool bit positioning and fixing effect, and is unlikely to shift. The strength ofthe cutter bar is improved due to different spiral angles of the chip removal chute; the cooling effect is enhanced by a design of a cooling guide slot, and the tool bit is simple to mount and detach.

The invention discloses a screed. The screed comprises a screed body (1), a left tension device (2) and a right tension device (3), wherein the left tension device (2) and the right tension device (3) are arranged symmetrically relative to a central line (L-L) of the screed body (1), one end of the left tension device (2) and one end of the right tension device (3) are respectively connected with an end portion of the screed body (1) at different height positions of the screed body (1), and the lengths of the left tension device (2) and the right tension device (3) both can be adjusted. The invention also discloses a paver. The torsional rigidity of the whole screed is good and the screed can not be twisted and deformed easily.

A carriage for an ink-jet printer constrains torsional deflections by providing carriage to writing-instrument latch interface features having a zero clearance interfit such that when opened, the writing-instrument latch allows individual writing-instruments to be accessed and when closed the writing-instrument latch reduces the carriage torsional deflections and increases the torsional stiffness of the carriage by providing a biasing force at each the interface feature.

The invention provides a quick-changing type hob main shaft of a gear hobbing machine. The quick-changing type hob main shaft is simple in structure, can quickly replace a hob, and comprises a torque input component, a hob installation component and an auxiliary support component. According to a hob installation shaft, only the installation of the hob needs to be considered. The hob installation shaft is provided with no bearing and no torque transmission element, thereby being simple in structure, and convenient to machine. The hob and the hob installation shaft are convenient to replace, and the quick-changing type hob main shaft is suitable for single unit processing or small batch processing of various small module gears. An auxiliary support shaft only bears friction torque generated by a bearing and a sealing ring on the torque respect, and the friction torque is small, and therefore the auxiliary support shaft is small in torsional deformation.

The invention provides a quick-replacing-type hob main shaft structure of a numerically-controlled gear hobbing machine. According to the hob main shaft, the structure is simple and a hob can be quickly replaced. The hob main shaft comprises a torque input component, a hob installation component and an auxiliary supporting component. In terms of a hob installation shaft, what needs to be considered is hob installation, no bearings and no torque transmission parts exist on the hob installation shaft, so the structure is simple, machining is convenient, the hob and the hob installation shaft are convenient to replace, and the hob main shaft is suitable for single unit processing or small batch processing of various small module gears. In terms of torque, an auxiliary supporting shaft only bears friction torque produced by a bearing and a seal ring, and the friction torque is small, so torsional deformation of the auxiliary supporting shaft is small. A rotary encoder is installed on the auxiliary supporting shaft, the auxiliary supporting shaft and the hob installation shaft coaxially rotate, and so the rotation angle of the hob installation shaft (the hob) can be precisely detected.

The invention provides a torsion beam assembly which comprises a spring base, a transverse beam and a longitudinal arm. The torsion beam assembly further comprises a reinforcing cover plate, the reinforcing cover plate is respectively connected with the transverse beam and the longitudinal arm, and the spring base is arranged on the reinforcing cover plate. The torsion beam assembly has the advantages that connecting strength of the transverse beam and the longitudinal beam can be enhanced through the reinforcing cover plate, the spring base can be arranged on the reinforcing cover plate, force is prevented from being directly transmitted to the transverse beam from the spring base, torsional force of the transverse beam is decreased, and torsion deformation of the transverse beam is reduced.

The invention discloses a detachable type mechanical arm cable-bunching device adopting peripheral slide spherical hinge connection, and belongs to the field of robots. The cable-bunching device comprises a dual-cable hoop mechanism, a spherical hinge connecting mechanism and a cable-bunching clamp mechanism, wherein the dual-cable hoop mechanism comprises metal dual cables, a metal hoop and a hoop connecting bolt; the spherical hinge connecting mechanism comprises a hoop slide connector, a spherical hinge external connecting part, a spherical hinge internal connecting part and a spherical hinge connecting bolt; and the cable-bunching clamp mechanism comprises a ratchet wheel, a pawl and a ratchet wheel connecting bolt. According to the cable-bunching device provided by the invention, thediameter of the dual-cable hoop mechanism is adjustable to meet different mechanical arm diameter needs. The detachable type mechanical arm cable-bunching device is wide in applicability, is simple instructure and is firm; and meanwhile, the spherical hinge connecting mechanism and the cable-bunching clamp mechanism realize relative motion in the peripheral direction of a mechanical arm, and greatly reduces torsional deflection, caused by rotation of the mechanical arm, of cables.

The invention, which relates to the technical field of accelerometers, discloses a piezoelectric accelerometer which comprises a rectangular frame. A mass block is arranged in the rectangular frame. Abeam I, a beam II, a beam III and a beam IV are fixed to one group of parallel side surfaces of the mass block; the beam I and the beam II are symmetrical and arranged at the same side surface; the beam III and the beam IV are symmetrical and arranged at the other side surfaces parallel to the side surface where the beam I is located; and the beam I and the beam III are symmetric to each other and the beam II and the beam IV are symmetric to each other. Piezoelectric patches are arranged on the upper surfaces of the beam I, the beam II, the beam III and the beam IV; and metal electrodes are arranged at four corners of each piezoelectric patch. According to the invention, all beams are arranged at the two symmetrical sides of the mass block, so that the stability of the accelerometer is enhanced and the torsional deformation of the accelerometer under the working condition is reduced; the thickness of the mass block is consistent with the thickness of the beam, so that the stability ofthe accelerometer is enhanced and torsional deformation is reduced; and the high dynamic bandwidth can be obtained.

The invention discloses a band sawing machine with a saw band automation resetting function and a control method thereof. The band sawing machine comprises saw bands, and a plurality of saw band resetting devices distributed in correspondence to the saw bands, wherein each saw band resetting device comprises a saw band monitor and a saw band lifting device. The control method of the band sawing machine has the saw band automation resetting function. According to the band sawing machine with the saw band automation resetting function and the control method thereof, before saw cutting work, the saw bands can be automatically installed on the band sawing machine, after the saw cutting work, the saw bands can be automatically demounted, and in the saw cutting work, upper and lower positions of the saw bands can be detected and the saw bands can be timely reset, and therefore the saw bands are enabled to keep working in the same horizontal plane, the probability that use life of the saw bands is influenced due to the fact that the saw bands swing up and down in running is reduced, production cost is reduced, labor intensity of work personnel is reduced, and installation speed of the saw bands is improved, production efficiency is improved, and furthermore damage to the saw bands, caused by sudden falling of the saw bands, is prevented, and the automation degree of the band sawing machine is improved.

The invention relates to the technical field of commercial heavy truck cooling systems, and discloses a guard-plate-free high-reliability commercial vehicle cooling module integrated structure which comprises a radiator, an intercooler, a condenser, a cooling fan protective cover and an insect-proof net, a water inlet chamber is arranged on the upper portion of the radiator, and a water outlet chamber is arranged on the lower portion of the radiator. The upper left portion of the side, close to the water inlet chamber, of the radiator is fixedly connected with the intercooler through a first bolt, the upper right portion of the side, close to the water inlet chamber, of the radiator is fixedly connected with the intercooler through a second bolt, and the lower left portion of the side, close to the water outlet chamber, of the radiator is connected with the intercooler through a metal shock pad. The lower right portion of one side close to the water outlet chamber is connected with the intercooler through a metal shock pad, the metal shock pad is fixedly connected with the water outlet chamber of the radiator through a plug pin, and the two sides of the radiator are each provided with a baffle for supporting the radiating core and releasing thermal expansion stress of the core. According to the guard-plate-free high-reliability commercial vehicle cooling module integrated structure, the reliability of the cooling module can be greatly improved, the lightweight requirement is met, and the weight and the cost are greatly reduced.

The invention discloses a rapid bending forming bending machine for a Z-shaped plate, and belongs to the technical field of Z-shaped plate bending. The rapid bending forming bending machine comprisesa fixed die plate A, a fixed die plate B, an upgoing moving template, a downgoing moving template, an upgoing thrust rod, a downgoing tension rod, an upgoing L connecting rod, a downgoing L connectingrod, a coaxial gear and a coaxial connecting rod. The fixed did plate A and the fixed die plate B are used for locking a plate to be bent, the upgoing moving template is hinged to the fixed die plateB through an upgoing hinge A, and the downgoing moving template is hinged to the fixed die plate B through a downgoing hinge A. The coaxial gear and the coaxial connecting rod are installed on a machine frame. The upgoing moving plate and the downgoing moving plate move synchronously, and under the action of the coaxial connecting rod, Z-shaped bending of the plate can be completed rapidly. The rapid bending forming bending machine for the Z-shaped plate adopts a single power system and synchronous reverse bending plate.

The invention discloses a flexible support photovoltaic tracking support with a self-locking function. The flexible support photovoltaic tracking support comprises a photovoltaic module support frameused for fixing a photovoltaic module, a stand column used for supporting the photovoltaic module support frame, a transfer unit installed on the stand column, and a driving unit used for driving thetransfer unit to work. The transfer unit comprises a steel cable, a cable clamp, a differential winding wheel and a transmission case; the driving unit comprises a driving shaft and a drive and control device; and a self-locking structure is arranged between the driving shaft and the transmission case. Through multipoint cooperative driving, a driving load is uniformly applied to the tracking support to greatly reduce the torsional deformation of the whole structure, so that the tracking accuracy of the tracking support and the power generation efficiency of the photovoltaic module can be ensured; by adopting multi-point effective support, the vibration response of the structure under the action of wind load can be effectively reduced, and the safety and reliability of the tracking bracketare improved; and moreover, the position of each driving node is self-locked, so that the integral rigidity of the support structure and the stability and reliability of structure locking can be effectively improved.