54results about How to "Good casting process performance" patented technology

The present invention relates to a mnicar engine cylinder pressure casting aluminium alloy, and its chemical component composition includes (wt%) Cu 1.5-3.0%, Si 10.0-12.0%, Mg 0.15-0.35%, the rest is al and the other is impurity. Said alloy tensile strength Qb is greater than or equal to 300MP. Said alloy has enough strength and rigidity and good size stability. Said alloy can meet the requirements for minicar engine cylinder body high-pressure casting process and mechanical working process.

The invention belongs to the magnesium alloy material field and particularly relates to a high strength and toughness rare earth magnesium alloy. The invention solves the defects of low strength and plasticity of the Mg-Al base alloy which is widely used now. The alloy comprises the following elemental compositions by weight percent: 3-9% of Al, 0.2-0.6% of Zn, 0.1-0.5% of Mn, 0.05-1.0% of Ce, 0.05-1.0% of La, 0.1-3.0% of Y, 0.1-2.0% of Er, 0.1-2.0% of Ho, 0.004% or less of impurity element Fe, 0.002% or less of impurity element Cu, 0.02% or less of impurity element Si, 0.001% or less of impurity element Ni and the balance Mg. Through combined action of the elements and proper homogenizing treatment, the comprehensive performance of the alloy is significantly improved.

The invention relates to a novel aluminum alloy material, in particular to an aluminum-manganese-magnesium base alloy containing copper, nickel and cerium. The compositions in weight percentage of the aluminum-manganese-magnesium-copper-nickel-cerium alloy are 0.4 to 0.7 percent of copper, 0.2 to 0.7 percent of nickel, 0.02 to 0.05 percent of cerium, 0.8 to 1.3 percent of manganese, 0.6 to 1.2 percent of magnesium, and the balance being aluminum and inevitable impurity elements. The aluminum-manganese-magnesium-copper-nickel-cerium alloy has the advantages that the alloy can simultaneously have high strength and good thermal stability, thermal fatigue property and fluidity, and is suitable for manufacturing thin-wall pipe fittings after adoption of multicomponents of the copper, the nickel and the cerium for composite microalloying on the basis of the aluminum-manganese-magnesium base alloy. The invention also provides a method for manufacturing the aluminum-manganese-magnesium-copper-nickel-cerium alloy.

The invention provides a main reducing gear shell. The main reducing gear shell comprises a large reducing shell face, a rotating base body, a protruding circular arc and a bearing pedestal mounting hole. A circular arc face is formed by the rotating base body and the protruding circular arc, and a first oil stopping plate and a second oil stopping plate are arranged at the concave position of an inner cavity of the circular arc face, are distributed on the two sides of the mounting horizontal line of the bearing pedestal mounting hole and extend to the edge from the bearing pedestal mounting hole; a first oil adding hole boss and a second oil adding hole boss which can machine oil adding holes communicated with a lubricating oil cavity are cast on the outer surface of the rotating base body; the oil stopping plates of an innovative structure are arranged in the main reducing gear shell, and a protruding structure is innovatively designed on the shell, so that integration of an oil inlet way and an oil returning way is achieved; under the four states of forward rotation and reverse rotation of lower offset and forward rotation and reserve rotation of upper offset of a driving conical gear, a main reducing assembly supporting bearing is lubricated; and generality of the main reducing gear shell and a main reducing assembly is greatly improved, and the development cost of an axle is reduced.

The invention provides a high-toughness heat-resistant Mg-Gd alloy suitable for gravity casting and a preparation method thereof. The alloy comprises the following chemical components of, in percentage, 4.0-10.0% of Gd, 2.0-6.0% of Zn, 0.5-1.2% of Al, 0.1-0.3% of Mn, 0.01-0.08% of M, and the balance Mg, wherein the M is one or two elements of Ti and B; the preparation method comprises the following steps that (1) burdening is performed according to a Mg-Gd alloy component; (2) an industrial pure magnesium ingot is melted; (3) heating is performed to 700 DEG C, and industrial pure zinc, an Mg-Gd and Mg-Mn intermediate alloy are melted; (4) heating is performed to 730 DEG C, after an industrial pure aluminum ingot, Al-Ti, Al-Ti-B and Al-B intermediate alloys added are all melted, refining isperformed to obtain a magnesium alloy melt; (5) gravity casting is performed; and (6) secondary solid solution and artificial aging treatment are performed. According to the high-toughness heat-resistant Mg-Gd alloy and the preparation method, after the alloy is subjected to the gravity casting, the secondary solid solution treatment and the artificial aging heat treatment, the tensile strength at room temperature is 300 MPa, the elongation percentage is 15%, the high-temperature tensile strength at 200 DEG C is 218 MPa, the elongation percentage is 20%, and the high-end requirement for lightweight development in the industries of aerospace, automobiles, telecommunication and the like is met.

The invention belongs to engines technical field, particularly an engine multi-oil channel split type machine body structure, comprising a cylinder block, a crankshaft case and a bearing cap. The cylinder block and the crankshaft case are positioned by a cylindrical pin and connected by bolts. The crankshaft case and the bearing cap are positioned by a rabbet and connected by bolts. The cylinder block is an integral structure, including a distribution column compartment, a cylinder hole and a water chamber, which are linked by an integral casting mode. The crankshaft case is fastened at the support end A plane under the cylinder hole of the cylinder block. The bearing cap is connected with the crankshaft case. Three longitudinal oil passages including an auxiliary oil passage, a distribution auxiliary oil passage and a cooling jet oil supply passage are arranged on the cylinder block. The structure has small volume, good casting process and large material selectivity. The complete structure is with great stiffness; the cylinder sealing reliability is high; multi-oil channels have good lubrication and cooling effect.

The invention is about a tin-base alloy material which is composed of 1-15% Pb, 0.2-0.9% Bi, 0.1-0.5% Cu, 0.03-0.12% Ca, Sn: the residua. For all kinds meduim-height decorations and crafts. The product has the good plasticity tensile strength and stiffness, also it doesn't have the heat check and is easy to solder and galvanizer.

The invention provides a support structure of a reverse counter shaft of a transmission. The support structure comprises a transmission housing, a partition and a boss. The transmission housing, the partition and the boss are integrated. Reverse idle gear mounting space is reserved between one side of a transmission main box, close to the partition, and the boss. The partition is provided with a second reverse counter shaft support hole and an auxiliary box counter shaft support hole, which are nonconcentric. One side of the boss, close to the transmission housing, is supported on the transmission housing through a plurality of ribs. Radial plates are disposed among the ribs. The reverse counter shaft boss is supported by the ribs in the support structure, and the reverse counter shaft boss with specific features is cast to reach a rear auxiliary box partition. By milling the reverse idle gear space with a disc milling cutter along with machining, casting of windows on two sides of the box is avoided effectively while fine casting manufacturability is guaranteed, casting manufacturability of the casing is improved, the parts such as window cover plates, spacers and bolts are omitted, and oil leakage spots are reduced effectively.

The invention relates to an electric forklift multifunctional wet drive system which comprises a drive axle assembly, a reduction gearbox assembly and an alternating current motor. The drive axle assembly is of a three-section structure, and comprises a wheel edge wet brake system, a wheel edge planetary gear train deceleration system and an axle shell, wherein the axle shell is located in the middle section of the drive axle assembly, and the two ends of the axle shell are connected with the wheel edge wet brake system and the wheel edge planetary gear train deceleration system correspondingly. A wheel edge planetary deceleration structure design is adopted, the outer dimensions of a axle shell central drive axle are reduced, the ground clearance is increased, matching of small tires is ensured, and the speed ratio of a transmission system is increased, so that a whole vehicle can be better matched with the alternating current motor with high speed and low torque; a fully enclosed multi-disc self-cooling type wet brake is adopted, the structure is compact, large braking torque can be provided under smaller pressure, dustproof, waterproof effects are good, and service life is long; and friction plates of the brake is made from paper-based friction materials, and the characteristics of low brake noise, good thermal stability and good environmental protection are achieved.

The invention provides a high-strength high-toughness heat-resistant Mg-Er alloy suitable for gravity casting and a preparation method thereof. The alloy is prepared from the following chemical components in percentage by mass: 4.0-10.0% of Er, 2.0-6.0% of Zn, 0.5-1.2% of Al, 0.1-0.3% of Mn, 0.01-0.08% of M, and the balance Mg, specifically, M is one or two elements of Ti and B. The preparation method comprises the following steps: (1) carrying out burdening according to the Mg-Er alloy components; (2) melting an industrial pure magnesium ingot; (3) rising the temperature to 700 DEG C to meltindustrial pure zinc, the Mg-Er intermediate alloy and a Mg-Mn intermediate alloy; (4) rising the temperature to 730 DEG C, and adding and melting an industrial pure aluminum ingot, an Al-Ti intermediate alloy, an Al-Ti-B intermediate alloy, and an Al-B intermediate alloy to obtain a magnesium alloy melt; (5) carrying out gravity casting; and (6) carrying out secondary solid solution and artificial aging treatment. After gravity casting, secondary solid solution treatment and artificial aging heat treatment, the alloy provided by the invention has tensile strength of 296 MPa and elongation rate of 18% at room temperature; while at high temperature of 200 DEG C, the tensile strength is 215 MPa and the elongation is 23%; and the requirements of aerospace, automobile, telecommunication and other industries for light weight are met.

The invention relates to a drive axle with wet brakes and sectional axle housings. The drive axle comprises an intermediate axle housing, a differential assembly, a left semi-axle, a right semi-axle, a left axle housing, a right axle housing, a left wheel side speed reducer assembly, a right wheel side speed reducer assembly, a left wet brake and a right wet brake, wherein the differential assembly is embedded and mounted into the intermediate axle housing; the left axle housing and the right axle housing, as well as the left wheel side speed reducer assembly and the right wheel side speed reducer assembly are sequentially and symmetrically arranged on the left side and the right side of the intermediate axle housing from inside to outside; the left wet brake and the right wet brake are symmetrically arranged and respectively located on the inner side of a joint between the intermediate axle housing and the left axle housing and on the inner side of a joint between the intermediate axle housing and the right axle housing; one end of the left semi-axle is connected with the differential assembly, and the other end penetrates the left wet brake and the left axle housing sequentially, and is then connected with the left wheel side speed reducer assembly; one end of the right semi-axle is connected with the differential assembly, and the other end penetrates the right wet brake and the right axle housing sequentially, and is then connected with the right wheel side speed reducer assembly. The drive axle has the characteristics of being stable in brake performance, uniform in stress to paired friction parts, convenient to machine, low in rejection rate and the like.

The invention provides an engine cooling water jacket and an engine. The engine cooling water jacket comprises a water jacket body, and the water jacket body sleeves the outer circumference of one endof a cylinder sleeve of the engine so that a gap can be formed between the inner wall of the water jacket body and the outer wall of the cylinder sleeve to form an annular cooling water cavity. The engine cooling water jacket further includes a water inlet pipe disposed on one side of the water jacket body, the cooling water cavity communicates with the water inlet pipe, and cooling water can enter the cooling water cavity through the water inlet pipe to cool the cylinder sleeve. The cooling water jacket is a separate component independent of a machine body of the engine, a tappet cavity is integrally formed above the cooling water jacket, the casting processability of the machine body of the engine can be effectively improved, the structure of the machine body is simplified, and the height of the cooling water jacket is adjusted to control a cooling area of the cylinder sleeve.

The invention discloses a cylinder cover assembly. The cylinder cover assembly comprises a cylinder cover body and an air inlet pipe hood, wherein a first open long cavity is integrally cast on the air inlet side of the cylinder cover body, and the first long cavity forms part of an air inlet pipe of an air inlet manifold; and the air inlet pipe hood is provided with a second open long cavity, and the first long cavity and the second long cavity are buckled to form an air inlet cavity of the air inlet manifold. According to the cylinder cover assembly, part of the structure of the air inlet manifold is integrated on a cylinder cover, and the independent air inlet pipe hood serves as the other part of the structure of the air inlet manifold so that integrated design can be guaranteed, system weight can be reduced, and the manufacturability of cylinder covers is optimized.

The invention discloses a two-speed pure electric transmission. The transmission comprises a front shell, a front bearing cover connected with the front shell, an input shaft assembly, an output shaftassembly, a transmission shell and a rear bearing cover connected with the transmission shell. The input shaft assembly is supported on the front shell. The two ends of the output shaft assembly aresupported on an inner ring of the input shaft assembly and the transmission shell correspondingly. An output shaft first-speed gear is arranged on the output shaft assembly. A sliding sleeve is arranged between the output shaft first-speed gear and the input shaft assembly. A shifting fork is arranged above the sliding sleeve and sleeves a shift rail in an idling mode. A transmission control device is arranged above the shifting fork. Three counter shafts are uniformly distributed on the periphery of the output shaft assembly. The two ends of each counter shaft are supported on the front shelland the transmission shell correspondingly. According to the two-speed pure electric transmission, the technical route of the three counter shafts is adopted, the center-to-center distance is reduced, and the transmission is small in size, light in weight and compact in structure; and meanwhile, the three counter shafts adopt the symmetric distribution structure of two up and one down, lubrication is guaranteed, the churning loss can be further reduced as much as possible, and the transmission efficiency is improved.