Monthly Archives: April 2023

Editor ’s Note: Read the Second Part On WHY Datums Use in Cad Should Remain Distinct from GD & T Datum Features.

　　

　　

　　The point of GD & T is usability, and commit, is available for information amigns, drawsmen, craftsmen, and inspectors is the key.

　　

　　

　　Tolerance — the topal amount a spiecific distility is permitted to view. The tolerance is the difference between the maximum and minimum limits.

　　

　　add value to ownership.

　　

　　They Can Cauise Ambiguity When used to Orient, Locate, or Control the form of part features.

　　For PARTS that are Completely Stand-Alone or One-Off, The Competition Edge of GD & T Might Be Blunt. For PARTS That Will Go into An Assembly. Witch My Apological.

　　No part is an island, entire of itse’f;

　　Every part ’s tolerance stacks in a nested drf.*

　　*Datum Reference F

　　

　　

　　Parts can vary in Several Ways:

　　Within-PART VARIATION of a Single Characteristic

　　Deviation of a Single Part from Nominal Specification

　　Variation of a Single PART FROM Other (What Should Be Identical) Parts.

　　While Those Distantions are Challenging to Address with Just Plus/Minus Dimensions, GD & T is Usefully Versatic for the Task.

　　Plus/Minus Tolerancing is used to tolerance drawing diary.

　　Zones (See Figure 2).

　　, They Put a Burden on the Designer and the Fabricator.

　　

　　LEAD to the DETECTION and Correntation of Privems Before the Part Can Be Rejected at Assembly.

　　GD & T can be describe the fIT of the Pin in the Hole very clear. It also can match how the part is used to how the part is met.

　　But the do not define the design.)

　　There are two main ways to designate diarsions as base:

　　The Numerical Values Can Have Boxes Placement Around them (a default or Simple Mouse-CLICK FUNCTION in a Cad System).

　　A Note Can be added stating "Untoleranced Dimensions Are Basic."

　　assure part metal stamping parts function.

Resistors/heaters are not simple.

　　

　　The inrush to a heater depends on how hot it gets, and the temperature coefficient of the material.

　　For a resistor with a nominally zero tempco, so component resistors, or resistors made from specialist resistance alloys, there will be essentially no inrush.

　　For a filament lamp, the resistor runs hot, and the tungsten filament has a strong tempco. You can expect an inrush of up to 10x running current when they are first turned on.

　　There are other heater types between these two extremes. Single metals will tend to have a small tempco in the 0.5% to 1% per degree region, which will result in a tiny inrush, probably much less than 2x. Quartz tube radiant heaters do not run quite as hot as filament light bulbs, and tend to use an alloy rather than tungsten, so could be anywhere in the none to 10x inrush range.

　　You have to find out, for your proposed heaters, how hot the heater wire itself is going to run, and what material it’s made from. Or just measure the inrush.

BMC is an acronym for Bulk Molding Compound. Since it is usually mixed in a dough-like form, rather than as a sheet, BMC is also called DMC. It is made of resins (such as unsaturated polyesters, epoxy resins, phenolic resins, etc.), glass fibres, fillers and other additives. It can be adjusted by changing the added material according to the required properties. It is usually made into stripes to facilitate moulding and is widely used in many industrial fields.

　　

　　BMC and SMC(sheet molding compound) are similar in composition. But for BMC moulding, firstly, it should be mixed the polyester resin and additives. After this step, it becomes a resin mixture, and then adds the filler. Next, reduce the mixing speed of the "premix" to prevent the glass fiber from cracking. If the material needs to be further concentrated, a thickener should be added. This material can be used for compression moulding and injection moulding.

　　The development history: In the early 1960s, BMC materials were developed by British BIP Company and American R&H Company with low shrinkage and non-shrinkage BMC, which greatly improved the dimensional stability, smoothness and appearance of the material. Polyester moulded plastic. In the 1970s, applications requiring dimensional accuracy, high rigidity and heat resistance, such as office machine stand. In the mid-1980s, to expand the range of applications, freely colourable BMCs were developed.

　　Proportionally, the BMC material is mainly composed of three parts. It consists of matrix resin – unsaturated polyester resin and low shrinkage system, reinforcing material – mainly glass fibre, filler – calcium carbonate, talc, aluminium hydroxide, china clay, etc. Although the amount of these components account for a small proportion of the total components, they play a very special role in the formulation system of BMC. They will have an important impact on the preparation process, product moulding and final properties of BMC.

　　

　　Glycol; Typical Acids used are like acid, isophthalic acid, TerephThalic Acid, and Maleic Acid Anhydride.

　　shrinkage.

　　Initiator

SOME SPECIAL Requirements of the Product, Such As Excessive Tempeature Will Damage the Product.

　　Chemical Thicker: Calcium Hydroxide

High Viscosity.

　　Internet release agent

Commonly usernal release agents are zinc Steaite (znst), Calcium Steaite (Cast) or Fluorine.

　　Colourant

How many, the Common Colornts Will Appear in Color Separation, Fading and Other Phenomena in High Tempeature and High-Pressure Flow.

　　SPECIAL Additives

processes.

　　Why Chy Choose Chopped Fiber Bulk Molding Compounds? Bulk Molding Compounds Offer Several Advantages Over Metal.

　　The BMC Composite Material has a Short Moulding Cycle and Can Be Compression Moulded, Or inject MoulDed, Suitable for Mass Production.

A Large Number of Fillers Can Be Added to the MOULDING of BMC Composite Materials to Meet the Requirements of Flame RETARDANCY and DIMENSIONLITY, and The Cost is Low.

High Mechanical FORCE and Stiffness Not only Under Static Load But Also Under Dynamic Load

Compared with complatics, BMC Molded Products Higher Heat Resistance, Insulation and Elastic Modulus.

Due to low worker skills, bmc composites are easier to automate, saving labour.

Products using bmc composits are dimensionally accurate.

Chemical Resistance

High Electrical Properties (Insulation)

Has good measurements

BMC Composite Materials are only Suitable for ManuFacturing Products with Small Size and Low Stringth Requirements (usually, The Streangth is About 30% Lower OF SMC).

The price of an injecting machine is higher.

Almost All Automotive Headlight Reflectors Are Made of BMC; Automotive iGniters, Partitions and Trim Panels, Speaker Boxes, ETC.;

High-Voltage Insulation for Large or Small HouseHold Appliance Parts Such as Microwave Tableware, Shells of Electric Soldering, ETC. Light Industry: Pump Housings

Structural parts in theerospace industry, Such as radomes, fairings, pipes, ETC. ETC.

　　

　　

　　BMC Electrical Box Mould, BMC Meter Box Mould and BMC Manhole Cover Mould, ETC.

　　Compression MOULDINGBMC MOLDING Manufacturer

Injection Moulding (Fully Automatic, BMC Molding ManuFactuer Including Over-MOULDING of Inserts))

Transfer Moulding

injecting compression modes

Sensor Element

　　

　　Thermostatic bi-metal

　　Switching difference (hysteresis)

　　+ or – 4°F (+or- 3°K)

　　Adjustment Range

　　30 – 140°F / 0 – 60°C

　　Noise Suppression

　　N (according to VDE 0875)

　　Connection

　　2 pole terminal for AWG 14 (2.5 mm2)

　　Mounting

　　Easily installed by clip mounting on 35 or 38mm DIN rail (included)

　　Housing

　　Flame retardant plastic UL94VO

　　Color

　　Gray (SB)

　　Protection

　　IP20

　　Approval

　　UL Recognized Component, cUL Recognized Component, CE

　　Switching Difference ( temperature)

　　2K (+/- 1K at 25C (+77F) 50% RH )

　　Switching Difference ( humidity)

　　4% RH (+/- 1K at 25C (+77F) 50% RH )

　　Setting range (humidity)

　　50 to 90% RH

　　Reaction time

　　aprox 5 sec

　　Contact type

　　Change over ( relay)

　　Service life

　　NO/NC 30,000 cycles

　　Max Switching Relay output

　　10A Resistive / 1.6A inductive @ 240 VAC 0.6 @ 60 VDC

　　Max inrush current

　　AC 30 A for 10 sec

　　Case

　　Plastic UL 94V-O light Gray

　　Mounting

　　35 mm Din rail

　　Weight

　　3.5 oz . 100g

　　Protection

　　IP20

　　Approvals

　　UL file E164102 / UR componet / CE

What size or breaker for solar panel string?

　　

What is a "solar string"?

　　PV Array, Individual PV Modules are connected in both Series and Parallel. A Series Connected Set of Solar Cells or Modules is Called a "String".

　　Series String Example

　　Parallel String Example

　　What size or circuit breaker for a solar Panel String?

　　To determine the normal fuse size use this equation:

　　String Circuit Ampacity = Short Circuit Current (ISC) x 1.56 = Fuse SIZE.

　　

　　Example:

　　String Short Circuit Current 8.73 AMPS (ISC) x 1.56 = 13.62 AMPS. Fuses Are Rated in Standard Sizes of 6, 8, 10, 10, 20, 25 OR 30 AMPS. The nec States that you muststedAbove the ampages value. For 13.62 amps, you would use a 15 amp fuse or circuit breaker.

　　Things to remember when sizing your solar combiner box.

　　1. The Current Passing Through the String Will Stay the Same As One Panel Regardless of the Number of Panels in the String.

　　2. The Voltage Increases with Each Panel You Add. The Voltage Will be the Sum of All the Panels Connect in Series.

　　1. The Current Passing Through the String Will Increase with Each Panel Added. Your Total Current Will Be the Sum of All the Panels in the String.

　　

Sunrun Offers Solar Installations in 21 States, Washington, D.C. And Puerto Rico.

　　

　　They Also Offer Strong Battery Options with Tesla’s Powerwall and Lg’s Resu Batteries.

　　a price match, keep sunrun’s score lower.

　　BELOW I’ll Give You The Essential Information About Sunrun and, when it’s postible, let you know how it compares to the completingition.

　　for a monthly fee.

　　Watch this: Is there a thing as dirty solar?

, Sunrun Should Be Able to Accommodate A Preference for A Specific Panel.

　　

　　

　　

　　

　　

　　

　　The Majority of Sunrun’s Business is in Third-PARTY OWNERSHIP.

　　-National Players, That’s Probably Ok. Still, we can start to get at that question with a quote in hand.

　　in Arizona TO $ 3.43 in Washington, DC.

　　Can add $ 10,000 to the count of a system, a significant addition. Semanek Also Noted Thatography Has A Significant Influence On Price.

　　Then, then

　　Homeowner Save Money.

　　AT 2% with a range of 0% to 2.9%. As long as your local eter gos up by more than that ear, you’ll constinue to save money.

　　Utility for all your electricity and provides stability in a budget, sexanek said.

　　As Alway, Make Sure You UNDERSTAND The DETAILS of Your Agreement and How THE MATHONO WORL WORK OUT FOR SPECIFIC SITUTUATION, if it dates at all.

　　loan for anything above and beyond that.

　　Solar Panels, WHETHER PURCHASED or OWNED BY A Third Party, Typically Save Money.

　　Steven Puetzer/Getty Imagessunrunrun Operates in 21 States and Washington, DC and Puerto Rico.

　　I Received A Call Less than Two Minutes after Submitting My Information.

　　

　　

　　Third-PARTY OWNERSHIP General SAVES You Less Money Over the Long Haul Thaning Panels Outricht, which is userly the bestable you can be-front counted or

　　

　　If you’re looking to purchase, you’ll likely get quality equipment from sunrun. Likewise, Sunrun’s workmanship warranty method tesla’s at 10 year.

　　OR PPAS. If you Purchase, you can find stronger warranties elsewhere.

Best cross-border innovative car

　　

　　SAIC-GM New Regal (2010)

　　In view of the two factors of price and interior space, family cars and sports cars have always been the relationship between well water and river water, but the new Regal has broken the strict boundary between them, realizing the cross-border between family and sports for the first time, highlighting the sports characteristics of cars without sacrificing interior space, and leading the new trend of making cars.

　　Originated from EPSILON II platform, the rear suspension lower arm made of aluminum alloy reduces the suspension quality and provides good response speed for control. The 245mm wide tires with 18-inch aluminum alloy wheels used in high-profile cars ensure the visual effect of vehicles and provide a good guarantee for grip. The turbocharged engine assisted by SIDI in-cylinder direct injection technology achieves an acceleration time of 0-100KM/H of 7.7 seconds and a maximum speed of 232KM/H with a maximum power of 162KW and a peak torque of 350 Nm. Based on the precise steering dynamic characteristics, Magnasteer magnetic assisted steering system is adopted, and on the basis of the traditional rack-and-pinion structure, the performance of variable steering damping with speed is realized.

　　Best continuous improvement car

　　SAIC-GM New LaCrosse (model 2010)

　　Generally speaking, every year, the model improvement of a classic car will adopt a vertical and gradual way, from the interior, lights, on-board electronic system to the extended version, transmission, engine specifications, etc., and one of them will be the main content every year. However, the emergence of the new LaCrosse has broken through the traditional evolution route of improved models, and the "leapfrog" transformation from appearance to core components is no less than shaping a brand new brand!

　　The appearance of the new LaCrosse can be described as thoroughly remoulded for the old LaCrosse. The body length of 5 meters and the wheelbase increased by 30mm make it more magnificent than the old LaCrosse. Thanks to the brand-new streamlined design and coordinated body proportion, it has a larger size and is visually more compact. The 3.0 V6 SIDI all-aluminum engine on the new LaCrosse 3.0 model is one of its highlights, with intelligent in-cylinder direct injection technology and DVVT variable timing valve technology. The maximum power is 190 kW/6800 rpm and the maximum torque is 296 Nm/5600 rpm, which is a revolutionary breakthrough for naturally aspirated engines that generally wander around 50 kW/L. The new LaCrosse also has many bright spots in the chassis: it is the only model in its class equipped with active suspension.

　　Best information technology car

　　SAIC Roewe 350

　　In-vehicle electronic control technology combined with 3G communication technology is the hottest topic in the current automobile industry. Information, communication and vehicle service-the cross-border integration of three application fields is becoming the key selling point of major automobile manufacturers. As the only vehicle in 2010 that mainly promoted vehicle electronics, Roewe 350 deserved to be the winner of this award, and as a self-owned brand car, its courage to keep up with the trend is worthy of respect.

　　After the general Onstar and Toyota GBook systems, the 3G intelligent network driving system-"inkanet" equipped by Roewe 350 not only includes routine functions such as real-time road navigation, car Bluetooth, multimedia playback, but also provides users with a lot of more humanized services such as built-in browser, InkaStore software store, fun games, Walkie Talkie global intercom, location cloud search/shorthand, life guide, weather forecast and after-sales service guide. And after some operation, you find that this pile of stuff is so easy to use and easy to use.

　　What is rare is that the Roewe 350′ s handling performance is equally good. Its lightweight steering system is very suitable for urban road conditions with low speed; The most critical power system, Roewe 350 is equipped with a 1.5L VCT engine, with VTi multi-angle continuous variable timing and Bi-Thermostat independent two-position stratified cooling technology, and its output strength is enough to make it easy and enjoyable to run on the road.

　　With these, drivers and passengers can sit in the car with peace of mind and enjoy the fun of life on wheels given by the electronic age.

　　Best environmentally-friendly car

　　Faw-Volkswagen magotan 1.4T

　　Electric vehicles and hybrid electric vehicles are the most dazzling stars in every auto show in recent years. However, under the background that new energy vehicles can’t be popularized in the market, we think this is the evaluation standard for automobile environmental protection practice. In this field, the public is clearly ahead of the world.

　　Volkswagen’s golden combination of TSI and DSG is recognized as the most efficient power system in the automotive industry. The new force in this family, the ——1.4T Magotan, has pushed Volkswagen to a new peak by striving for environmental protection without sacrificing the glory of performance.

　　Although the displacement is only 1.4L, the maximum torque of 1.4TSI engine is 220Nm at 1750-3500rpm, while most 2.4L naturally aspirated engines on the market need 3000rpm to obtain the same torque output, which means that the explosive power of 1.4TSI engine can reach the level of mainstream 2.4L engine in daily use.

　　The 7-speed dual-clutch gearbox matched with the engine uses a dry dual-clutch with higher transmission efficiency. The wide gear ratio provided by up to 7 gears enables the engine to achieve higher working efficiency under various working conditions, so as to make up for the driver’s lack of technology and effectively reduce fuel consumption.

　　Best new model of the year

　　FAW-Volkswagen CC

　　CC won this honor for two specific reasons: "concept+technology". From the low-end Jetta to the high-end Phaeton, Volkswagen brand cars have always been low-key, but the appearance of CC has completely subverted Volkswagen’s century-old brand image, like lightning, and is called "the most beautiful Volkswagen". As the first crossover model in China that combines a four-door sedan with a coupe, CC gives domestic consumers a new choice and a new awareness.

　　This "most beautiful Volkswagen" is equally proud in terms of technology. Volkswagen’s latest EA888 series 2.0TSI engine combines two key technologies of turbocharging and in-cylinder direct injection, with a maximum power of 147kw/5100-6000rpm, and maintains a low fuel consumption while obtaining excellent power; The performance of the golden partner 6-speed DSG wet powershift is unparalleled, which further magnifies the dynamic performance of CC, and the acceleration time of 0-100km/h is 7.48 seconds, ranking among the top three in the same class.

　　In addition, what makes CC get a lot of extra points is its high technology armed to teeth, including automatic parking, ACC adaptive cruise, lane keeping, auxiliary display of reversing, tire pressure monitoring and automatic parking, which is only one step away from unmanned driving. And at present, Volkswagen’s top car equipment is just so much. Is it more cost-effective to spend nearly 300,000 yuan to enjoy it?

The Air Flex? Air Purifier and Room Fan is both a premium box fan and powerful air cleaner in one. Unlike most box fans, which can overheat or break down when used with a filter, this fan was specifically engineered to work with a filter to powerfully clean the air in your room while providing a cooling breeze. Additionally, this portable fan was designed to stand up to tough use with durable construction, UV color protection paint, and a Weather-Shield motor for worry free window use. The fan comes with a standard pleated filter that is rated to remove dust, smoke, and pollen from the air so allergy sufferers can breathe easier and feel more comfortable at home. Easily customize your clean air by using any standa rd 20 x 20 x 1-inch filter, available at home stores. Features steel body construction, premium fan blade for maximum air flow, ergonomic control knob, easy carry handle, and Lasko’s trusted safety fuse technology. Made in the USA from domestic and imported parts.

　　

This. The Ordinary Conventional Fuse Which Still Governs 40% Market in India Can Only Perform Basic Function of Short Circuit and Nothing Beyond It.

　　

　　

　　This brings us to the cracial question -how Concernet is we of Safeguarding Our Homes with Sturdy Protection Devices and Saf Electrical Wiring?

　　Other Gadgetry to Create a Comfortable Living Environment, Investing in Safe and Robust Electrical Wiring Often Takes A backseat.

　　In the building circuit protering category, RCCB Multiplying The CHANCES of Safety for Residents RCCB RCCB Exponentially.