Q:What type of industry does the machinery and building accessories processing belong to?

Every industry has average tax rate, the contribution of each this argument does not exist, the industrial enterprise is nade VAT. The more value-added products you pay more.

Q:What functions should be achieved in mechanical structure design?

The main features of the mechanical structure design are: (1) it is a set of thinking, drawing and calculation (sometimes necessary experiments) in one of the design process, is involved in machinery design, the most specific, the largest volume of work, in the whole process of mechanical design, an average of about 80% of the time for the structure design plays an important role in the success of mechanical design. (2) the multi solution of mechanical structure design, that is, the mechanical structure that satisfies the same design requirement, is not the only one. (3) the mechanical structure design stage is a very active design link, often needs to cross repeatedly. Therefore, in the design of mechanical structure, it is necessary to understand the basic requirements of the mechanical structure from the whole of the machine

Q:What measures can effectively reduce the construction accident rate?

Hefei construction workers training _ security technology to prevent accidents: prevent the basic starting point of safety accidents is to take measures to restrict energy and dangerous material, to prevent the accidental release. Common safety techniques for preventing accidents are eliminating dangerous sources, limiting energy or dangerous substances, isolating and so on.

Q:What are the sectors of machine building and parts processing?

3., machinery manufacturing is also a kind of industry, many industries have parts manufacturing, processing links. Therefore, the processing of parts does not belong to a particular industry.

Q:What are the details of construction machinery parts in sand casting?

(1) all kinds of equipment and equipment with the arrival of the body parts, as equipment and components, gas pipelines and accessories such as materials, power capacitors on the construction equipment and materials division rules, various electric fans and electrolyzer etc.. 1, high voltage circuit breaker, platform, shortwave communication equipment and shortwave TV antenna device, natural white afrodite, chemical equipment parts, recycling. For the completion of the building, elevator rails are materials, catalyst, screen (including the box and the instrument has been installed in place, by the design unit to provide manufacturing drawings, unit combination instrument, strengthen the investment in the process of construction and management, and other accessories are materials; non standard equipment, sliding contact line

Q:What are the construction materials, components, fittings and equipment in construction?

Board: cast-in-place slab, prefabricated slab, prefabricated hollow slab, reinforced concrete slab, wood board. The wall, brick wall, concrete wall, roof parapet, wall light. Door: solid wood door, plywood door, steel door. Window: window, wooden window, Aluminum Alloy window, plastic steel window. The building is in addition to other parts of the building and construction of houses built some auxiliary components, such as scaffolding, construction with pipe thread adjuster, building rod, triangle construction support, reinforced joints etc..

Q:Mechanical bearings, all types? Roughly

Spherical roller bearings have two raceways in the inner and outer ring raceways between spherical assembly, a drum shaped roller bearings. The center of curvature of the raceway of the outer race is consistent with the center of the bearing, so it has the same self-aligning function as the self-aligning ball bearing. When the axle and shell are bent, the axial load in two directions can be automatically adjusted. Radial load capacity, suitable for heavy load and impact load. Inner diameter is tapered bore bearings can be installed directly. Or the use of tight sets, the demolition cylinder installed on the cylindrical shaft. The cage uses a steel plate holder, a polyamide forming cage and a copper alloy car holder.

Q:What are the mixing arms of the concrete mixer?

Mixing arm concrete mixer is a component of the mixing arm itself and divided into lateral mixing arm (positive and negative points), stirring arm (also have positive and negative points), stirring arm below is the bearing seat connected, connected with 4 sets of high strength bolts with stirring arm. The top is equipped with wear-resistant mixing blades, connecting with mixing blades, high-strength bolts 2 sets. In addition, some manufacturers have designed mixing side bonded shaft swivel, is installed in the interval between the stirring arm fixed and rotated in two ways.

Q:Building materials, equipment, components and fittings products must have "three certificates" is what cards?

Product qualification certificate means the qualified certificate, qualified label or qualified seal issued by the manufacturer to indicate the quality of the products manufactured by the factory and qualified on the package of the product or product. This is the producer's guarantee of the quality of its products, and also the obligation of a product to be stipulated by the law.

Q:Construction machinery production need to deal with what documents?

The person in charge of the enterprise, the person in charge of the project, full-time safety management personnel in "safety assessment qualified" column content according to the "three persons" Safety Assessment Certificate (fill in the contents of enterprise work safety management staff should meet the enterprise production safety management, the safety management department staff with the qualification to the total contract for not less than 5, not less than 3 professional contracting labor subcontracting, not less than 1; the construction site should be equipped with full-time safety management personnel according to the project size can be determined, according to the construction area of less than 10 thousand M2 project has at least a part-time staff of more than 10 thousand M2; project 1 - 2 full-time staff; more than 50 thousand M2 large sites, according to different professional safety management group);