Box frame parts of the blank selection generally use cast iron, the most common blank is sand casting castings. Single piece of small batch production, trial production of new products or structure size is very large, can also be used plate welding blank.
1. Belt wheel blanks for small and medium-sized belt wheel HT150 manufacturing, its blanks are generally sand casting, production batch is small with hand modeling; production batch is large when the machine can be used for modeling; for the structure of a large size of the belt wheel, in order to reduce the weight of the welded blanks can be used steel plate.
2. Chain wheel blanks are mostly made of steel, the most commonly used forging. Single piece of small batch production using free forging; production batch is larger when the use of die forging; for new products, trial or repair parts, you can use profiles; for the number of teeth is greater than 50 driven sprocket can also be used for strength higher than HT150 cast iron, sand casting, molding method depending on the production batch to decide.
3. Selection of cylindrical gear blanks For steel gears, if the size is small and the performance requirements are not high, you can directly use hot-rolled bars, in addition to the general use of forging blanks. Production batch of smaller or larger size gears using free forging; production batch of larger small and medium-sized gears using die forging. For the larger diameter, more complex structure is not easy to forge the gear, the use of cast steel blanks or welded combination of blanks.
How many materials are used to categorize box parts? What are they? Know help to tell, thank you.... It is best to be more detailed.
Cast iron is generally used;
HT200 ~ HT400
A single piece is sometimes taken to plate welding
Specific conditions, such as aircraft with aluminum-magnesium alloy
In specific words, check the metal materials manual it
What machine tools are used to process the case parts
According to the case of the machining accuracy, use of purpose and size to select the machine tool. The use of purpose and size to select the machine tool, gear box, electronic control box, explosion-proof box, etc., the technical requirements of the gear box is relatively high, mainly the center distance between the gears and the combination of the box surface; explosion-proof box is the flatness of the surface of the explosion-proof surface and the finish (surface roughness). General use of equipment for CNC boring and milling machine, milling and boring machine and higher precision horizontal boring machine (with rotary table) View original post >>
Reduction gearbox material
Although the drawings are HT200, but the actual production does not necessarily comply.
What material is good for the cabinet box
The development of the overall cabinet has come into common people's homes today, but also become an indispensable part of the landscape of ordinary families. The overall cabinet mainly includes cabinet, panel (door), countertops, hardware several parts. There are many types of cabinet materials, prices vary. How can you buy your favorite cabinets, how to make the design reasonable, beautiful and practical, how to avoid the traps in the purchase, it is necessary to do one of the homework.
The following overall cabinet is broken down one by one to tell:
First, the cabinet.
The vast majority of cabinets are made of particle board, a very small part of the use of MDF. Particle board is natural wood crushed into particles, after pressing into the board, its waterproof performance is better than MDF, is currently the main material of the kitchen cabinet cabinet.
Particle Board Classification:
According to the use of points: divided into class A particle board and class B particle board;
According to the particle board structure: a. single-layer structural particle board; b. three-layer structural particle board; c. gradient structure of the particle board; d. directional particle board; e. waffle particle board; f. molded particle board;
According to the surface condition of points: undecorated Particleboard: a. Sanded particleboard; b. Unsanded particleboard. Veneer particle board: a. impregnated paper veneer particle board; b. decorative laminate veneer particle board; c. veneer veneer particle board; d. surface coated veneer particle board; e. PVC veneer particle board, etc.;
The standard cabinet materials use TPH ammonia particle board (including imported kitchen cabinets). The main material of the three polyhydrogen ammonia particle board is the natural logs cut, crushed with specifications of the small shape, coupled with environmentally friendly glue, high temperature, high pressure refining and become. Three polyhydrogen amine board is in the plain board with color paper after 600 ℃ high temperature pressing and become, China's environmental standards 100mg ≥ 40 grams. European minimum standard is E-1 level, 100mg ≥ 10 below, E-O level standard is 100mg ≥ 3 below, super E-O is no formaldehyde. Domestic manufacturers use more is the Jilin Forestry Group Dew River particleboard, its quality through the European E-1 standard, ≤ 8 mg / 100 grams of dry board, (A grade superior).
Characteristics of Dew River particleboard:
a. Focus on environmental protection, using high-tech environmentally friendly glue formula to produce E1 grade and moisture-proof environmentally friendly substrate in line with European standards.
b. The use of fine decorative paper, exquisite color, with a clear texture, the sun does not fade and so on;
Love Home / Grid Board EGGER particleboard features:
Material selected from the growth of several species of conifers in the cold zone of the European continent. In order to make the board has good physical properties and reprocessability, the process of mixing a small part of the sawdust. Particleboard overcomes the shortcomings of natural wood, with not easy to deform and stable physical properties. Therefore, particle board is a kind of natural logs by cutting, crushing, high temperature and high pressure made of a more suitable for the production and use of home furniture board. The surface of Aijia board is flat and not easy to deform. It is also a kind of green environmental protection products, form and function of the harmonious unity in order to make the excellent quality of the product is perfectly reflected.
MDF
is made of wood fiber or other plant fibers as raw materials, applying urea-formaldehyde resin or other applicable adhesives made of man-made panels, density board due to soft impact resistance, easy to reprocess. Moisture and humidity resistance is poor. Flatness is better, usually used for panel furniture, office furniture more. Because MDF is easy to loosen after fastening, and the strength is not enough to fasten again after loosening. Because of the good flatness of MDF, it is more suitable for door and countertop. Used for box board, in the assembly fastening process, subject to certain limitations.
Need to pay attention to the thickness of the board, most of the 16mm, of course, there are 18mm, the thicker the more expensive. Many people just care about the door and countertops, in fact, here is also a pattern, the advertisement is 18mm plate, sign a contract to change to 16mm. Many people do not pay attention. The actual quality of the cabinet to consider: 1. plate, 2 thickness, 3 sealing. Edge is very important, the thicker the better the more durable, the formaldehyde inside the foam board will not volatilize out.
Second, the panel (or door)
Door thickness is generally 18MM, there are a variety of materials.
1, solid wood panels
With a return to nature, the effect of return to simplicity, flower edge corner processing and paint color requirements for the process is high, can be better expressed in the classical style. It should be noted that the so-called solid wood board is not the whole are solid wood. Its door frame is solid wood, cherry color, walnut color, oak color. Door core for the MDF paste solid wood veneer, generally in the solid wood surface to do concave-convex modeling, exterior painting, thus maintaining the original wood color and beautiful shape. This ensures that the special visual effect of solid wood, edge and core board combination can ensure that the door plate strong ...... >>
What materials are generally used for the main parts (gears, shafts, box)
We have always used 45 steel to do shaft parts, and after that, we use the tempering treatment, thanks for adopting
What are the main technical requirements for the processing of box parts
Accuracy and surface roughness requirements to ensure that bearings and shafts mounted in the hole Rotation accuracy;
The flatness and straightness of the plane, the purpose of which is to ensure that the assembly of the whole machine after the contact surface contact stiffness and guiding surface positioning accuracy;
The positional accuracy of the hole system is the most important technical requirements of the box parts, including the hole and the hole of the positional accuracy of the box box parts machining the surface of the main problem is the plane and the hole. Its technical requirements are mainly reflected in three aspects: the size of the hole and hole and plane positional accuracy.
What are the structural characteristics and main technical requirements of box parts
Structural characteristics
Box class is the basic parts of the machine or component, it will be the machine or component shafts, sets, gears and other related parts assembled into a whole, so that they maintain a correct position with each other, and in accordance with a certain transmission relationship coordinated transmission of movement or power. Therefore, the processing quality of the box will directly affect the accuracy, performance and life of the machine or component.
Common box parts are: machine tool spindle box, machine tool feed box, gearbox body, gearbox body, engine block and seat. According to the different structural forms of box parts, can be divided into the overall box, as shown in Figure 8-1a, b, d and separation of the box, as shown in Figure 8-1c two categories. The former is the whole casting, overall processing, processing is more difficult, but the assembly of high precision; the latter can be manufactured separately, easy to process and assemble, but increased assembly workload.
Although the structure of the box form a variety of forms, but still have *** with the main features: complex shape, thin wall and uneven, internal cavity, processing parts, processing difficulty, both high precision requirements of the hole system and the plane, there are many lower precision requirements of the fastening hole. Therefore, the general medium-sized machine tool manufacturers for box parts machining labor volume of about 15% to 20% of the entire product processing volume.
The main technical requirements
1. The shape of the main plane accuracy and surface roughness
The main plane of the box is the assembly reference, and is often the processing of the positioning reference, so there should be a high degree of flatness and small surface roughness value, otherwise, the direct impact of the box processing positioning accuracy, the impact of the box and the seat of the total assembly of the contact rigidity and mutual Positional accuracy.
General box main plane flatness in 0.1 ~ 0.03mm, surface roughness ra2.5 ~ 0.63μm, the main plane of the assembly datum perpendicularity of 0.1/300.
2. Hole dimensional accuracy, geometrical accuracy and surface roughness
The bearing support hole on the box itself the dimensional accuracy, shape accuracy and surface roughness are required to be high. Surface roughness are required to be high, otherwise, it will affect the bearing and box hole with precision, so that the shaft rotary accuracy decreased, but also easy to make the transmission parts (such as gears) produce vibration and noise. General machine tool spindle box spindle support hole dimensional accuracy of it6, roundness, cylindricity tolerance does not exceed half of the hole diameter tolerance, surface roughness value of ra0.63 ~ 0.32μm. The rest of the support hole dimensional accuracy of it7 ~ it6, the surface roughness value of ra2.5 ~ 0.63μm.
3. The main holes and planes with each other positional accuracy
The same axis of the hole should have a certain coaxial requirements, the support hole should also have a certain hole distance between the dimensional accuracy and parallelism requirements, otherwise, not only assembly difficulties, but also make the operation of the shaft deteriorate, the temperature rises, bearing wear increases, gear meshing accuracy decreases, causing vibration and noise, affecting the life of the gear. The tolerance of hole distance between the support holes is 0.12~0.05mm, the parallelism tolerance should be smaller than the hole distance tolerance, generally 0.1~0.04mm in the whole length. the tolerance of coaxiality of the holes on the same axis is generally 0.04~0.01mm, the tolerance of parallelism between the support holes and the main planes is 0.1~0.05mm, and the tolerance of perpendicularity between the main planes and the main planes to the support holes is 0.1~0.04mm, the tolerance of verticality between the main planes and the main planes to the support holes is 0.1~0.04mm. 0.1~0.04mm.
What are the main machining surfaces of the box parts
The main machining surfaces of the box parts are
(1) the dimensional accuracy, shape accuracy and surface roughness of the box bearing holes
(2) the mutual position of the box bearing holes
(3) the accuracy of the box main plane