9 results about "Malleable iron" patented technology

The invention discloses a wedge block pouring system and process for riveting of a piston compressor, and belongs to the technical field of workpiece casting processes. The wedge block pouring system for riveting of the plug compressor comprises a pouring assembly, the pouring assembly comprises a pouring cup, a transverse pouring gate and a straight pouring gate, and the section of the pouring cup is in an inverted-T shape; the cross gate is communicated with the bottom of the sprue cup and symmetrically extends to the left side and the right side; the multiple straight pouring gates are vertically arranged side by side and are communicated with the bottom of the transverse pouring gate; the multiple castings are arranged on the two sides of the sprue, communicate with the sprue through the flow gates and are symmetrically arranged side by side in an obliquely upward mode, the number of products of each type is multiplied, and the method is suitable for mass production of malleable cast iron. According to the wedge block pouring process for riveting of the plug compressor, flocculent graphite and a tempered pearlite base body are formed after the casting is subjected to heat treatment, and the technical problems that a finished product manufactured through an existing casting process is low in tensile strength and yield strength and poor in ductility are solved.

The present application belongs to the technical field of pipe fitting elbow airtightness detection, and particularly relates to a cast steel elbow airtightness detection device, which comprises a material sorting device, a feeding device, a detection device and a feedback control system, wherein the material sorting device comprises a material lifting mechanism and a conveying mechanism; the feeding device comprises a mechanical arm and a magnet cylinder; the detection device comprises a plurality of detection stations, each of which comprises a detection base for placing materials; the present application uses the mechanical arm to build a detection bridge, uses the conveying mechanism to convey the materials, then uses a straight vibration mechanism to uniformly arrange the materials into a fixed posture, and on the basis of the cooperation of the mechanical arm and the magnet cylinder to suck and place the materials into the detection stations, realizes the process of airtightness detection of the materials through the cooperation of an airtightness tester and the detection base; the present application also provides an airtightness detection method based on the device, uses the feedback control system to connect the mechanisms in the device, and realizes the automation of the detection process on the premise of ensuring the detection quality.

The invention discloses a white-core malleable cast iron alloy forging forming device, and relates to the technical field of forging, the white-core malleable cast iron alloy forging forming device comprises a forging machine body, a stabilizing mechanism for preventing cast iron alloy from shifting is arranged at the output end of a hydraulic cylinder of the forging machine body, and a knocking mechanism for reducing adsorption of the cast iron alloy and a die cavity is arranged outside a die of the forging machine body. An ejection mechanism for pushing cast iron alloy out of a mold is arranged at the top of the forging machine body, and a connecting rod force increasing mechanism for providing explosive mechanical force for demolding is arranged on the side face of the ejection mechanism. The rolling wheels with spring buffering can be used for pre-pressing and correcting the blank in advance, micro deviation possibly generated when the white-core malleable cast iron blank enters a die cavity is counteracted, the wall thickness deviation or folding defect caused by uneven forging stress is avoided, and the dimensional tolerance precision of parts such as pipeline connecting pieces and the like is guaranteed from the source.

The utility model discloses a malleable iron casting casting device which comprises a casting seat, a casting cavity is arranged on the inner side of the casting seat, a cooling cavity is arranged on the outer side of the casting cavity, a cooling box is arranged on the surface of one side of the casting seat, a conveying pump is arranged on the top of the cooling box, a casting cover is arranged on the top of the casting seat, and a casting cavity is formed in the casting seat. And a casting opening is formed in the top of the casting cover, a base plate is arranged on one side of the bottom of the casting base, a lifting screw rod is rotationally arranged on the top of the base plate through a bearing, and the surface of the lifting screw rod is movably sleeved with a lifting screw block. According to the malleable iron casting casting device, after casting molding, cooling water in the cooling box can be pumped and conveyed into the cooling cavity by starting the conveying pump, and rapid cooling of the malleable iron casting after molding is achieved through rapid and comprehensive contact between the cooling water in the cooling cavity and the bottom and the side face of the casting cavity; and a traditional cooling mode is replaced, so that the cooling efficiency is higher, and the effect is better.

The application provides a processing technology for increasing spheroidal graphite in malleable cast iron and a cast iron piece, and the processing technology comprises the following steps: adding raw materials into an electric furnace to smelt original molten iron, pouring the original molten iron into a ladle, pre-adding a modifier into the ladle, and the mass ratio of the modifier is 0.8-1.8%; pouring the molten iron into a sand mold to obtain a gray-white porosity green body; performing a tamping and annealing process on the gray-white porosity green body; the modifier is a rare earth magnesium silicon alloy, and after the modification of the original molten iron, the components of the molten iron include the following components in mass parts: iron 92-95%, carbon 2.8-3.8%, silicon 1.8-3.8%, manganese <0.6%, sulfur <0.2%, phosphorus <0.1%, magnesium <0.055%, and chromium <0.1%; and the cast iron piece is prepared by using the above process. The application has the advantages that the strength and toughness of the green body are increased, the green body is prevented from being broken during tamping, the annealing process temperature is low and the annealing process time is short, the production energy consumption is reduced, the production cost is saved, the proportion of the cavity in the sand mold is increased, the molten iron utilization rate is increased, the re-furnace loss is reduced, and the tamping difficulty is not increased.

This utility model relates to the field of cable harness technology and discloses a lightweight electric vehicle cable harness, including a flexible square corrugated tube with a placement groove inside. This utility model uses the flexible square corrugated tube as the external protective structure of the cable harness. Because it uses a flexible material, it can adapt to the complex installation space inside an electric vehicle and will not easily break during bending, ensuring the safety of the internal cables. Furthermore, the square shape of the flexible square corrugated tube allows for easy stacking during installation, improving space utilization and preventing movement. It also eliminates the need for additional support components to fill gaps, reducing overall weight and achieving the lightweight requirement. A malleable iron wire is fixed to the outer wall of the placement groove, allowing the flexible square corrugated tube to maintain its shape. A square insulating sheet is fixed to the inner wall of the flexible square corrugated tube, primarily serving as insulation. The inner shell protects the cables.

The application discloses an invar tool automatic welding equipment and belongs to the technical field of metal welding equipment. The invar tool automatic welding equipment comprises a clamp, a bearing plate is arranged on the clamp, two pieces to be welded are arranged side by side on the top surface of the bearing plate in the horizontal direction, and the butt surfaces of the two pieces to be welded form a welding seam. A welding execution piece comprises a welding unit, a position adjusting unit and a contact unit, and the welding unit provides a welding wire for the welding seam from top to bottom. The invar tool automatic welding equipment is provided with clamping strips, adopts resistance heating, and current directly flows through the inside of the welding seam area to generate heat. The heat is concentrated, the heat affected zone is small, the energy utilization rate is extremely high, and the heating speed is much higher than that of a traditional external heat source. Therefore, the production cycle is greatly shortened, and the production efficiency is improved. The chromium-zirconium-copper clamping strip with an embedded thermocouple is used as a resistance heating electrode, the brazing temperature of the welding seam area can be stably controlled in a stable range, and temperature fluctuation caused by arc swing and heat loss in traditional TIG welding is avoided.

This invention discloses an automated production line and method for malleable iron pipe fittings, integrating an automatic tilting and filling mechanism, an automatic tilting and unloading mechanism, an empty can transport line, an aerial transport device, a ground transport device, and a turnover cage. This achieves automated production of malleable iron pipe fittings. The automatic tilting and filling mechanism automatically tilts the pipe fittings from the turnover cage into the unloading hopper, replacing manual bending and hoeing for filling, thus reducing labor intensity. The change in filling method increases filling efficiency by more than 50%. The automatic tilting and unloading device automatically tilts the pipe fittings from the annealing tank into the empty turnover cage, replacing overhead crane lifting and manual can breaking and unloading, further reducing labor intensity and eliminating safety hazards. The automatic empty can transport line automatically transfers empty cans to the filling station, replacing forklift handling and manual stacking, reducing ineffective handling and improving production efficiency.

A black heart malleable cast iron according to one embodiment of the present invention comprises a ferrite matrix and graphite aggregates contained in the matrix, while containing, in terms of the mass ratio, from 50 ppm to 100 ppm of boron and from 65 ppm to 200 ppm of nitrogen. With respect to this black heart malleable cast iron, the crystal grain size number of the matrix is from 8.0 to 10.0, said crystal grain size number being obtained by quantifying the grain size of the matrix by comparing the metal structure photograph thereof with the standard diagram of crystal grain sizes.