1072results about How to "Improve forming quality" patented technology

The invention relates to the measurement system of a cantilever tunneling head pose and the method, which is characterized in that a laser mobile electrical total station is arranged on a formed tunnel wall, and measures the coordinate of the tunneling machine body in the earth coordinate system, a body deflection angle sensor is installed behind a reflector prism, and measures to the deflection angle of the tunneling machine body, a biaxial inclination angle sensor surveys the pitching angle and the roll angle of the tunneling machine body, oil cylinder stroke sensors install in a cantilever lifting oil cylinder, a cantilever revolving oil cylinder and a tunneling head flexible oil cylinder to survey the oil cylinder stroke, a wireless communication module and a data acquisition module transmit the metrical data of the laser mobile electrical total station, the cylinder stroke sensor, the biaxial inclination angle sensor and the body deflection angle sensor to the computer, which gathers, processes, and calculates the pose of the tunneling head relative to the body and the earth coordinate system, so as to realize the surveying of the tunneling head pose. The invention has the advantages of good timeliness, high precision, and suitable for the measurement and the position of the tunneling head pose of a tunneling equipment such as the cantilever tunneling machine.

The invention provides a manufacturing method of an arc additive of a titanium alloy structural part. An arc wire feed additive manufacturing method is used to carry out welding of each layer of ring members, i.e., a wire feeder feeds welding wires, the welding wires are melted by a welding gun to weld, and ring welding beads from the inside to the outside are sequentially lapped to form a layer of ring members; and then one thickness of layer of the welding gun is increased, and the welding method is repeated to form another layer of ring members, and so forth; and finally, a plurality of layers of ring members are overlapped to form a titanium alloy structural part. The welding forming part provided by the invention has a fine and uniform grain size and good mechanical properties, and can meet or exceed the level of congruent castings, and the product has a short development cycle and high processing efficiency.

The invention discloses a method and device for laser pulse and electromagnetic pulse composite forming of a metal sheet and relates to the technical field of processing and manufacturing fastening holes. The head part of an energy absorption rod (10) is a conical surface; a high-power pulse laser outputs an annular laser pulse (8) by means of a light spot regulator (15); the annular laser pulse (8) accommodates the tip part of the conical surface on the head part of the energy absorption rod (10) in a hollow part of a laser beam, and meanwhile, the annular laser pulse (8) is acted on the conical surface on the head part of the energy absorption rod (10) to induce plasma (17) to explode and generate impact waves acted on the internal walls of the fastening holes, so that the fastening holes are strengthened. The method and the device are suitable for strengthening the fastening holes with small diameter; the hollow part of the annular laser pulse (8) keeps away from the tip part of the conical surface of the energy absorption rod (10), so that the energy absorption rod (10) is difficult to damage, which is beneficial to continuously working and achieving a good strengthening effect.

The invention belongs to the field of laser processing, and relates to a near-net forming method and device for composite manufacturing a fine workpiece based on laser additive manufacturing and subtractive manufacturing. According to the method, the construction parameters of a three-dimensional digital-to-layer slicing layer are generated by utilizing software, laser additive manufacturing processing is carried out, and ultrafast pulse laser subtractive manufacturing processing is carried out alternately in the laser additive manufacturing processing process to form a three-dimensional entity. The device comprises a computer control device, a sealing molding chamber, a light path selecting system and an inert protection gas source; during additive manufacturing processing, the computer control device controls the light path selecting system to select the laser emitted by an additive manufacturing laser device and perform laser additive manufacturing processing; and during subtractivemanufacturing processing, the computer control device controls the light path selecting system to select ultrafast pulse lasers emitted by a subtractive manufacturing laser device and perform the ultrafast pulse laser subtractive manufacturing processing. According to the near-net forming method and device, the preparation of complex and fine-structure parts can be completed in a high-precision and integrated manner, the defects that traditional laser additive manufacturing is low in the forming precision, high in roughness and cannot be used for preparing a fine and complex inner cavity areovercome.

The present invention discloses a bending forming processing equipment for pipe material. Said equipment includes the following several portions: bending die clamping die, pressing die, pressurizing plate, circumferential pressure-applying hydraulic cylinder, axial propulsion hydraulic cylinder and bending machine working table. The circumferential pressure-applying hydraulic cylinder pushing rod is rigidly connected with the pressurizing plate, the axial propulsion hydraulic cylinder pushing rod is flexibly connected with the pressing die end portion. The circumferential pressure-applying hydrautic cylinder can be used for driving said pressurizing plate to circumferentially apply pressure to the pipe material, and the axial propulsion hydraulic cylinder can be used for driving pressing die to apply tangential force to the pipe material, the bending die is fixed on the bending machine working table by means of bending centre, and bending die, pressing die and clamping die respectively have the groove fit with the outer diameter of said pipe material, the pressurizing plate is connected with the pressing die by means of dovelail groove, and the pressurizing plate also is connected with the bending machine working table by means of dovetail groove.

The invention relates to a shape follow-up support deformation control method for selective laser melting forming of a thin-walled part. On the basis of existing selective laser melting forming support adding, the stress deformation behavior of the large thin-walled structural part in the forming process is analyzed and predicted, according to the molded surface structural characteristics, a design method that different shape follow-up supports are added at different positions is adopted, the problems such as cracking and deformation at the different positions such as the bottom in the selective laser melting forming process are solved through the method of supporting structure shape follow-up adding, the stability in the forming process is effectively improved, and the reliability of thequality of the formed structure part is guaranteed.

A bending-forging machine for manufacturing the large crankshaft or bellcrank used by ship is composed of upper die with lower arc end, bending lower die, upper and lower flat stocks, and insertion plate with lower arc end. Its forging method includes such steps as upsetting a steel ingot to become a flat square billet, drawing it to become a blank with shoulder, pressing V-shaped die on the middle of blank to form symmetric two V-shaped slots, bending by upper and lower dies, removing the upper and lower dies, inserting the insertion plate for finishing, trimming, and removing insertion plate.

The invention discloses a control device and method for achieving wide-range scanning of an electron beam and a additive manufacturing device capable of achieving the wide-range scanning of the electron beam. The control device comprises a negative electrode, a grid electrode, a positive electrode, a focusing coil, a deflecting coil, an anastigmatic coil and a DA converter, wherein the anastigmatic coil is used for generating anastigmatic magnetism which can produce an anastigmatic magnetic field to control the astigmatic degree. According to the control device, the current of the focusing coil can be changed to achieve good focusing of the electron beam; in addition, the current of the anastigmatic coil can be changed to remove astigmatism of the electron beam, and thus beam spots can remain high quality; in addition, the formation quality of electron beam selective melting additive manufacturing (3D printing) can be greatly improved, and particularly the precision and quality of printed large parts can be improved. The control method is high in operability, and enables high-quality scanning of the electron beam in any route and within a wide range.

The invention discloses a method for welding a heterogenous system aluminum alloy through electron beams. Welding base metal is an aluminum-silicon cast aluminum alloy and an aluminum-magnesium wrought aluminum alloy. The method specifically includes the following steps of (1) joint designing, (2) preweld cleaning and assembling, (3) setting of welding parameters of the electron beams, (4) setting of injection positions of the electron beams, (5) welding, (6) modification welding and (7) postwelding cleaning. By means of the method, the welding quality is improved; the welding cost is reduced; meanwhile, the method is free of the special requirement for the environment and does not need special preweld and postwelding treatment; the welding process is easy to implement; the work efficiency is high; the method is quite wide in application prospect.

The invention discloses a 3D free-bending forming method and five-axis free bending device for metal pipes. The five-axis free bending device for the metal pipes comprises a pipe pushing module, a pipe axial-movement guiding module, a manipulator bending module, an induction coil heating module, a lubrication module, a reverse scanning module and a measurement module. The pipe pushing module comprises a conical push rod (3), a Z-direction servo motor (5), a ball screw (4) and a linear guide rail (1), and the Z-direction servo motor (5) is used for axial feeding of the pipes. The manipulator bending module comprises an X-direction servo motor (15), a Y-direction servo motor (16), a bending die driving servo motor (18), a bending die holder driving servo motor (17), a bending die (8) and a bending die holder (9). According to the 3D free-bending forming method and five-axis free bending device for the metal pipes, elbow pipes with different bending radii can be formed only by controlling the movement track of the manipulator bending device, and meanwhile since the plane of the bending die can be kept perpendicular to the axes of the pipes in real time, the forming quality of the bent pipes is good.

The invention discloses a multiclamp type stretch forming machine and relates to plastic processing equipment for curve forming of plates, belonging to the field of mechanical engineering. The machine mainly comprises clamping mechanisms (1), a stretching mechanism (2) and a stand (3), wherein a row of clamping mechanisms (1) are respectively distributed at both sides of the stand (3); each clamping mechanisms (1) is provided with a lower connecting hole (4) and a rear connecting hole (5); and all the connecting holes are respectively connected with the stretching mechanism (2) by pin shafts or cardan joints. The machine can realize the flexible control of a plurality of clamps, ensure that a workpiece is more easily attached to a die in the stretching process, obviously improve the material utilization ratio of the workpiece and obtain higher workpiece forming effect.

The invention relates to a molding die for processing high-tension plate parts, which comprises an upper die seat (11), a material press core (13), an upper die fixing plate (14), a lower die seat (15), a convex die (17), a material press plate (18) and an upper die knife block (19), wherein the upper die fixing plate (14) is arranged between the upper die seat (11) and the upper die knife block (19), at least one nitrogen spring (12) is arranged between the material press core (3) and the upper die seat (11), at least two nitrogen springs (16) are arranged between the material press plate (18) and the lower die seat (15), a locking unit (21) is manufactured on the material press plate (18) and the upper die knife block (19), a material plate (20) locked between the material press core (13) and the locking unit (21) in molding can be fully stretched for plastic deformation, and the large springback amount after molding is overcome.

The invention relates to a compound molding tool system for hot stretch bending and creep deformation of a section bar. The compound molding tool system comprises a cantilever-type section bar stretch bender, a heating box, a self-resistance heating system, an electric control cabinet and a clamp, wherein the heating box is located on the working table of the middle part of the cantilever-type section bar stretch bender; the electric control cabinet is located in front of the cantilever-type section bar stretch bender and is connected with the cantilever-type section bar stretch bender; the self-resistance heating system is located at the periphery of the tool system; and the clamp is arranged on a cantilever of the cantilever-type section bar stretch bender. An application method of the compound molding tool system for the hot stretch bending and the creep deformation of the section bar comprises six steps. According to the compound molding tool system for the hot stretch bending and the creep deformation of the section bar, the hot stretch bending process of the creep deformation process of the section bar are compounded; the plastic deformation resistance of the section bar is reduced; and the residual stress after the section bar is processed is reduced, and thereby, resilience is reduced, and the molding precision and the structure stability are improved. Compared with products obtained by adopting a traditional stretch bending method, a final product obtained by the compound molding tool system is higher in quality, and the production efficiency is increased.

The invention relates to a hot impact extrusion process and a device for a large annular barrel type forged piece, which belongs to the technical field of hot forming of a large hollow forged piece. The process comprises the following steps: firstly, an extrusion cushion is placed on a press platform; secondly, the blanks to be heated are put on the extrusion cushion; thirdly, an extrusion cylinder is sleeved on the extrusion cushion; fourthly, a profiling punch is applied with force so that a mold cavity is filled with the blanks; fifthly, the lubricant is added; sixthly, a solid punch is applied with force so that the blanks are extruded to the set position of the process; seventhly, a hollow punch is sleeved on the solid punch and applied with pressure, so that the blanks are extruded to the set positioned of the process; eighthly, the extrusion cushion is taken out and a bottom flushing drain cap is replaced; and ninthly, the core material at the bottom is flushed out through the hollow punch. The devices required for finishing the process comprise an extrusion cylinder, an extrusion cushion, a profiling punch, a solid punch, a hollow punch, a solid extension rod, a hollow extension rod and a bottom flushing drain cap. The invention solves the difficult problems existing in the large annular barrel forged piece of long process flow of free forging, more forging times and large reverse extrusion molding for die forging and improves the utilization ratio of the material and the molding quality of the forged piece.

The invention discloses an electroplastic incremental forming device for a plate and a working method thereof, and belongs to the field of metal processing. The device comprises a machine tool and a pulse power supply, wherein a plate clamping device is fixed on a workbench of the machine tool; a clamping block, an electric brush holder and a retainer are arranged on a main shaft of the machine tool; the clamping block is connected with a tool head used for processing the plate; the electric brush holder is L-shaped, one end of the electric brush holder is fixed on the main shaft, and the other end of the electric brush holder is connected with an electric brush used for being abutted against the clamping block; the retainer is U-shaped, one end of the retainer is fixed on the main shaft, and the other end of the retainer stretches to a place below the plate and is connected with a lower press head used for being abutted against the lower surface of the plate; the tool head faces the lower press head; and the two poles of the pulse power supply are connected with the electric brush and the lower press head respectively. The electroplastic incremental forming device for the plate disclosed by the invention is simple in structure, easy to control, and low in processing cost; the forming accuracy of the plate is high; and the forming limit and the forming quality of the plate are increased and improved.

The invention discloses a full-position connecting pipe and safety end circular seam welding method achieved through tungsten electrode inert gas arc welding. According to the method, nickel base alloy serves as an isolating layer to carry out machining on a connecting pipe and a safety end so that a welding groove can be formed by the connecting pipe and the safety end during assembling, and the welding groove is welded. A plurality of weld beads are welded during welding, the bottom end of a part to be welded is arced during welding, spin welding is carried out along one side of the part to be welded to the top end of the part to be welded, arcing is stopped, the bottom end of the part to be welded is arced again, spin welding is carried out along the other side of the part to be welded to the top end of the part to be welded, and arcing is stopped. When the welding groove is a double-faced U-shaped narrow gap groove, an outer groove is welded but not completely welded, back chipping and complete welding are carried out on an inner groove, and then complete welding is carried out on the outer groove. When the welding groove is a single-faced narrow gap groove, the groove is completely welded, a cushion plate is removed, and back chipping is carried out.

The invention relates to a heading machine memory cutting control system and a method of the heading machine memory cutting control system. The heading machine memory cutting control system is composed of a detection unit, a control unit, a proportion amplification plate, a load sensitivity type proportion reversal valve group and an execution unit, wherein the control unit comprises a PCC (programmable computer controller), an intelligent operation control panel, a remote controller and a machine body operating handle; and heading machine memory cutting comprises a manual demonstration process and a memory automatic cutting process. The method comprises the following steps that: firstly, a heading machine driver utilizes the remote controller or the machine body operating handle to operate the heading machine to cut once according to a top plate and a bottom plate of a coal seam and the coal rock distribution condition, and an airborne computer control system records information a demonstration path detected by the detection unit; and then the recorded keypoint data is subjected to path matching and intelligent optimization, a control signal is sent to the execution unit according to the path after optimizing, so that a cutting head is automatically controlled to move along a demonstration track, and the memory automatic cutting is performed. The heading machine memory cutting control system is also provided with a boundary control function in the whole memory cutting process, and the tunnel shaping quality when the manual cutting and memory automatic cutting are performed is ensured. The heading machine memory cutting control system and the method of the heading machine memory cutting control system provide a new control means for heading of a coal road boom-type roadheader under the condition with stable surrounding rock of roadway.

The invention relates to manufacturing equipment of metal materials, in particular to a double-nozzle-scanning inclined spray type cylinder blank injection moulding device. The double-nozzle-scanning inclined spray type cylinder blank injection moulding device comprises a deposition chamber, wherein a ladle used for storing molten metal and atomizing nozzles connected to the bottom of the ladle are arranged at the top of the deposition chamber, and the deposition chamber is internally provided with a rotatable deposition substrate; the deposition substrate is arranged in the center of the deposition chamber and a rotating shaft of the deposition substrate is arranged in a vertical direction, and the atomizing nozzles are arranged above the deposition substrate; and the distances between the two atomizing nozzles and the axial lead of the deposition substrate are different. The injection moulding device provided by the invention has the advantages: the operating stability and the moulding quality of the whole system are improved, and the requirement on the bonding strength of the deposition substrate and a cylinder blank is lower, thus ingot blanks in a larger scale can be conveniently manufactured; the two atomizing nozzles are adopted, and thus a large-diameter ingot blank product can be formed; waste of material and exhaust pollution can be reduced; and optimal moulding technological conditions can be conveniently formed.