44results about How to "Clear production process" patented technology

The large and medium-sized automobile air conditioner flexible production line of the present invention includes a non-powered roller workbench, a lifting platform, a rotating roller transition workbench and a transition plate; it can be designed as a straight-through or curved production line according to the site, and then the corresponding number can be set according to the specific production process The non-powered roller workbench and the rotating transition roller workbench, each roller workbench represents a process, and a transition plate is set on each roller workbench, and the transition plate carries large and medium-sized automotive air-conditioning components for assembly one by one. The assembly process is basically completed when it is transferred to the lifting platform. The positive effects of the present invention are: the production process is clear, the parts are moving, the labor intensity of workers is reduced, and the input of corresponding equipment and tooling is reduced; the equipment used is suitable for assembly line operation, which improves production efficiency, and the consistency of different products is relatively high. Well, it can adapt to the production of large and medium-sized automotive air conditioners with many varieties and small batches.

The invention discloses a novel process for producing manganese sulfate by combination of a pyrogenic process and a wet process. The novel process comprises the steps: (1), roasting with anthracite culm to obtain roasted manganese powder; (2), mixing the roasted manganese powder with a secondary solution and / or water for pulping, adding sulfuric acid, adding iron pyrite, performing a thermal reaction, filtering to obtain primary slag and a primary liquid; (3), pulping the primary slag by using water and / or third solution, adding sulfuric acid, adding iron pyrite, performing a thermal reaction, filtering to obtain secondary slag and a secondary liquid, rinsing and filtering the secondary slag to obtain third slag and a third liquid, discharging the third slag; and (4), removing iron from the primary liquid, removing heavy metals, standing, heating and concentrating and crystallizing, dewatering and drying to obtain the manganese sulfate. The novel process has the beneficial effects that (1), the content of full manganese in the manganese slag reaches below 4 percent, the content of tetravalent manganese slag reaches below 0.6 percent, the metal recovery rate reaches above 82 percent, and the mine consumption cost is low; and (2), the main content of a manganese sulfate product reaches above 98.5 percent, the content of a water insoluble is within 0.02 percent, the content of impurities is within 0.3 percent, and the content of heavy metal elements is within 6 ppm.

The present invention discloses a large diameter copper pipe production process, which comprises: 1, forging and stamping, wherein a furnace temperature is increased to 800-900 DEG C, a cooper ingot is forged and stamped into a copper rod, and thermal insulation is performed for 2-3 h; 2, reverse extrusion, wherein the copper ingot is subjected to position limitation by using an outer mold, the cooper rod is subjected to reverse extrusion through an inner mold to form a cooper pipe having the bottom, and the extruded cooper pipe is subjected to thermal insulation for 0.5 h and then is cooled to achieve a room temperature, wherein electric heating is performed on the inner mold and the outer mold during reverse extrusion, such that it is ensured that the temperatures of the inner mold and the outer mold are maintained at 400-450 DEG C; and 3, cold extrusion, wherein the cooper pipe is subjected to cold extrusion to stretch so as to achieve the required size, and thermal insulation is performed for 3-4 h. According to the present invention, the manufacturing process is clear, the temperature and other parameters are reasonably controlled, and particularly the molds are electrically heated during reverse extrusion, such that it is ensured that the cooper rod hardness is moderate and cracking does not occur during the reverse extrusion process so as to ensure manufacture success and quality.

The invention discloses a wax mold preparation method for investment casting precision casting. The wax mold preparation method comprises the following steps that (1), mold closing is performed; (2),wax material preparation is carried out, wherein the wax material is added into a heat preservation furnace of a wax pressing machine; the temperature is raised to 90 DEG c to 100 DEG c, and after thewax material is completely melted, silicon carbide particles with the particle size of 6-14 [mu]m and the content of 3-5 wt% are added while the mixture is stirred, standing for 20-30 minutes is performed after the silicon carbide particles are completely added; cooling water with the temperature of 20-25 DEG c is injected into a cooling groove of the wax pressing machine for reducing the temperature of the wax to be 55-60 DEG c for later use; and (3), wax mold pressing is carried out, wherein a wax injection gun is used for injecting the wax material in the wax pressing machine into a mold cavity at the pressure of 0.3-0.5MPa, and when the wax is discharged from exhaust holes, wax injection is stopped; next, a mold water cooling system is started, and the flow is controlled to be 5-8 L / min; and when a temperature measurement thermocouple detects that the temperature of the wax is less than or equal to 35 DEG c, the mold is opened to take out the wax mold. According to the method, theeffect of enhancing the strength of the wax mold is achieved through the framework, the size contraction and deformation of the wax mold can be reduced effectively, the precision of the prepared waxmold can reach + / -0.5 mm, and the shrinkage rate is stabilized within 0.40%.