78results about How to "Improve welding process" patented technology

The present invention provides a switch machine control unit integrated training platform, relating to railroad experiment training teaching equipment. The platform comprises a training table, a control cabinet and a main control circuit. The control cabinet is positioned on the training table by a support plate. A safety relay and a circuit breaker are positioned on the support plate. The operation control panel of the control cabinet is provided with a track light band, operation buttons, indication lamps, a signal repeater, a current meter and an LCD screen. The main control circuit comprises a power supply module, a switching unit module, a 6502 electric centralized control circuit, a computer interlock control circuit and a turnout control unit circuit. According to the training platform, the space occupation is small, the manufacturing cost is low, a plurality of experiment training programs can be carried out, the turnout control unit study and the computer interlock control principle study can be effectively carried out, and the field teaching needs of railway electrical work departments and railway colleges are satisfied.

The invention discloses a welding method for 10CrMo9-10 steel. The method comprises the following steps of: S1), machining a welding groove to obtain an X-shaped groove, milling a piece to be welded by using an edge milling machine, wherein the groove angle is 70 degrees, cleaning the groove and parts in the ranges of 25mm on two sides of inner and outer walls of the groove until metal luster is exposed; S2), welding a positioning layer of the piece to be welded by a mixed gas protective welding mode; S3), welding a priming coat of the piece to be welded by the mixed gas protective welding mode; S4), welding a filling layer and a cover surface layer of the piece to be welded by a double-wire submerged-arc welding mode; and S5) tempering the welded piece to release stress, wherein the tempering temperature is 680 to 730 DEG C. A welded joint welded by the method has the high-temperature endurance strength, the creep limit, the physical property, the hydrogen resistance, the oxidation resistance, and the brittle fracture resistance which are basically the same as those of a base material; cold crack can be effectively prevented; high production efficiency can be achieved; and the welding process for the steel is greatly improved.

The invention relates to a circuit board surface treatment method. The circuit board surface treatment method comprises the following steps: performing entire-board copper electroplating on the outer layer of the circuit board; performing the first time of super-roughening treatment on the surface of the circuit board; performing pattern transferring on the circuit board and displaying the circuit pattern on the circuit board; performing oil removing and the second time of super-roughening treatment on the surface of the circuit board; plating copper on the circuit pattern of the circuit board to form a thick copper layer; performing the third time of super-roughening treatment on the surface of the circuit board; and plating nickel-gold alloy on the surface of the thick copper layer to form a nickel-gold alloy layer on the thick copper layer. Before the nickel-gold alloy is plated, the copper surface of the circuit board is roughened by the three times of super-roughening treatment; the roughened copper surface enables the gold surface that is plated with the nickel-gold alloy to be dark so as to satisfy the requirement on a matte gold color; the circuit board, after performing the pattern transferring and before performing the nickel-gold alloy plating, is also subjected to two times of super-roughening treatment in order to prevent the circuit copper surface, that is developed after performing the pattern transferring, from being directly electroplated with the nickel-gold alloy in the non-oxidized condition, so that the shortcoming that the copper layer is separated from the nickel-gold alloy layer is avoided.

The invention discloses a boiler afterheat recovery system with a vertical low-resistance cooling system. The boiler afterheat recovery system comprises a boiler, afterheat recovery equipment, a smoke treatment device and a steam tank; the afterheat recovery equipment includes a heat exchange module, a first heat exchange pipe, a second heat exchange pipe and a heat exchange water tank; a first circulating pump is arranged between the heat exchange module and the first heat exchange pipe; the heat exchange module, the first heat exchange pipe and the first circulating pump form a refrigerant circulating loop; a first induced draft fan is arranged between a cyclone dust remover and the second heat exchange pipe; an intake pipe of the cyclone dust remover is communicated with a smoke outlet of the boiler; an exhaust pipe of the cyclone dust remover is communicated with an intake port of the second heat exchange pipe through the first induced draft fan; an exhaust port of the second heat exchange pipe is connected with the smoke treatment device by a second induced draft fan; multiple layers and multiple rows of high-density linear bent heat exchange pieces are arranged on the surface of the middle part of the second heat exchange pipe; the smoke treatment device comprises a filter chamber; a spraying device is arranged on the middle inner wall; and a settling pool is arranged at the lower end. The boiler afterheat recovery system is better in heat exchange effect, higher in afterheat recovery rate and more environment-friendly.

The invention belongs to the technical field of submarine pipeline paving and relates to a combined strengthening type bulking-preventing device capable of preventing a submarine pipeline from bulking-propagation. The combined strengthening type bulking-preventing device capable of preventing the submarine pipeline from bulking-propagation is fixed on the exterior of the submarine pipeline which is needed to be protected. The combined strengthening type bulking-preventing device capable of preventing the submarine pipeline from bulking-propagation comprises at least two arc-shaped long-striped steel plates and at least two steel rings. A cross section of every arc-shaped long-striped steel plate is a section of a circular arc. The inner radius of the circular arc is equal to the outer radius of the submarine pipeline. A plurality of arc-shaped grooves are arranged inside of the steel rings. The inner diameters of the steel rings are equal to the outer diameter of the submarine pipeline. The number of the arc-shaped grooves is not less than the number of the arc-shaped long-striped steel plates. The width of the grooves is equal to the width of the arc-shaped long-striped. Each arc-shaped long-striped steel plate is uniformly distributed on the exterior of the submarine pipeline along the axial direction of the pipeline. Each arc-shaped long-striped steel plate is fit with the submarine pipeline and is embedded in an arc-shaped groove of each steel ring. The combined strengthening type bulking-preventing device capable of preventing a submarine pipeline from bulking-propagation is light in weight, easy to install and capable of having high efficiency at the same time.

The invention discloses a platinum channel installation method considering the expansion characteristic and a platinum channel. The method comprises the steps that a throat pipe is installed at a molten glass outflow hole of a glass kiln, a heating clarification section is built and installed, so that the heating clarification section is communicated with the throat pipe, a masonry stirring feeding section is installed, so that the stirring feeding section is communicated with the forming equipment, and meanwhile, a reserved position is reserved between the stirring feeding section and the heating clarification section, a cooling section is installed at the reserved position, an expansion reserved gap is reserved between the cooling section and the heating clarification section, and the cooling section and the stirring feeding section are welded together. The method is used for installing the platinum channel, the installation technology and process of the platinum channel in the installation process can be more accurate, and the expansion size needing to be reserved is more accurate and controllable. The technical requirements of high-quality glass kiln construction are met.

The invention discloses a positioning and clamping device for circuit board welding fabrication and a positioning and clamping method of the positioning and clamping device. The positioning and clamping device comprises a machine base, a table top and clamping mechanisms, wherein the clamping mechanisms are respectively arranged on the two sides of the table top; each clamping mechanism comprisesa straight-line motion mechanism and a clamping board; each clamping board is connected with the corresponding straight-line motion mechanism; each clamping board is pushed by the corresponding straight-line motion mechanism to do straight-line motion on the table top; and a contact switch is mounted on the contact surface of each clamping board. According to the positioning and clamping device disclosed by the invention, through the straight-line motion mechanisms and the clamping boards, mechanized clamping is realized, based on the situation that a circuit board is positioned to the middleposition of the table top, a welding procedure is performed, the accurate degree and the accuracy of welding are improved, and welding quality is improved and the mechanized positioning and clamping device is time-saving and labor-saving, the welding procedure is accelerated, and labor cost is reduced.

The invention discloses a welding method of a cushion framework of a left seat on the back row of an automobile, and relates to the technical field of automobile manufacturing. The welding method comprises the following steps of A, welding tool manufacturing; B, assembling, wherein various parts of the cushion framework are assembled on a welding tool; C, spot welding, wherein the assembled partsare subjected to spot welding to form an overall cushion framework; D, transferring, wherein the assembled and welded overall cushion framework is transferred to a welding station; E, welding, whereina welding robot is adopted for overall welding the assembled and welded cushion framework; and F, residue cleaning checking, wherein the welded cushion framework is cleaned, and completion checking is carried out. According to the welding method, the problems that in an existing welding method for the cushion framework of the left seat on the back row of the automobile, welding tool locating arrangement and a pressing mechanism are not reasonable, and the welding work efficiency is low can be solved.

The invention discloses a boiler afterheat recovery system with a vertical low-resistance cooling system. The boiler afterheat recovery system comprises a boiler, afterheat recovery equipment, a smoke treatment device and a steam tank; the afterheat recovery equipment includes a heat exchange module, a first heat exchange pipe, a second heat exchange pipe and a heat exchange water tank; a first circulating pump is arranged between the heat exchange module and the first heat exchange pipe; the heat exchange module, the first heat exchange pipe and the first circulating pump form a refrigerant circulating loop; a first induced draft fan is arranged between a cyclone dust remover and the second heat exchange pipe; an intake pipe of the cyclone dust remover is communicated with a smoke outlet of the boiler; an exhaust pipe of the cyclone dust remover is communicated with an intake port of the second heat exchange pipe through the first induced draft fan; an exhaust port of the second heat exchange pipe is connected with the smoke treatment device by a second induced draft fan; multiple layers and multiple rows of high-density linear bent heat exchange pieces are arranged on the surface of the middle part of the second heat exchange pipe; the smoke treatment device comprises a filter chamber; a spraying device is arranged on the middle inner wall; and a settling pool is arranged at the lower end. The boiler afterheat recovery system is better in heat exchange effect, higher in afterheat recovery rate and more environment-friendly.