Akwankyerɛ a ɛfa Selecting Self-Drilling Screws ma Steel Structures: Sɛnea Wobɛkwati Ɔdan atifi nsuo ne Rust
Wɔ dade adansi ne dade dan atifi no, ebia self-drilling screws yɛ nketewa, nanso ɛno na ɛkyerɛ ɔdan no nyinaa nkwa nna. Nnwumakuw pii a wɔyɛ adwuma wɔ hɔ no de wɔn adwene si bo nkutoo so bere a wɔretɔ nneɛma no, na wobu wɔn ani gu nneɛma a ɛho hia te sɛ drill point matching, coating corrosion resistance, ne washer durability so.
Mpɛn pii no, nea efi ade a wɔde kyekyere nneɛma a ɛnteɛ a wɔpaw mu ba no yɛ kɛse:
Nsu a ɛretu: EPDM washers no mu paapae anaasɛ ɛsɛe wɔ asram pii mu.
Stripping: Screw no ntumi nkɔ dade no mu, na ɛma adansi no kyɛ a ɛho ka yɛ den.
Rusting: Zinc plating a wɔtaa de di dwuma no ntumi nnyina nkyene a wɔde petepete mpoano mmeae ano.
Sɛ́ fastener yɛfo a ɔwɔ osuahu no, yɛaboaboa akwankyerɛ yi ano de aboa wo ma woapaw self-drilling screw a ɛyɛ pɛ a egyina dade a ɛyɛ den, nneɛma a atwa yɛn ho ahyia, ne nnwinnade a wɔde hyehyɛ so.
1. Paw "Drill Point" a Ɛfata no ma Steel Thickness
Eyi ne mfomso a wɔtaa di wɔ adwuma no mu. Drill point (anaasɛ dua) a ɛwɔ self-drilling screw mu no yɛ adwuma te sɛ drill bit na ɛsɛ sɛ ɛne dade a worekyekyere no mu duru hyia.
#3 Drill Point: Ɛfata ma 1.0mm - 3.0mm dade ntama a ɛyɛ tratraa. Eyi ne nea wɔtaa yɛ, a wɔde yɛ dade adan a emu yɛ hare ne ɔdan atifi.
#4 Drill Point: Ɛfata ma 3.0mm - 5.0mm medium-tickness dade mprɛte.
#5 Drill Point: Ɛfata ma 5.0mm - 12.0mm dade a emu yɛ duru.
Onimdefo Afotu: Sɛ wode #5 drill point di dwuma wɔ 2.5mm krataa a ɛyɛ tratraa so a, ebia skru no rentwa nkɔ dade no mu. Mmom no, "ɛbɛhwe ase" wɔ soro, na ɛde ɔhyew a ɛsɛe drill point no na esiw fastening no aba.
2. Paw Surface Coating a Ɛfata ma Wo Atwa Yɛn Ho Ahyia
"Jacket" a ɛwɔ skru no mu no na ɛkyerɛ bere tenten a ɛbɛkyɛ. Nneɛma a wɔtaa de kata so ho ntotoho ni:
.
| Nneɛma a Wɔde Kata So | Nkyene a Wɔde Petepete So Sɔhwɛ (ASTM B117) . | Dwumadi a Wɔkamfo Kyerɛ | Ɛka |
|---|---|---|---|
| Zinc a Ɛyɛ Bruu/Fitaa | 24 - 48 Nnɔnhwerew | Nneɛma a atwa yɛn ho ahyia a ɛwɔ dan mu, a ɛhɔ yɛ kusuu | Fam |
| Zinc a ɛyɛ kɔkɔɔ | 72 - 96 Nnɔnhwerew | Abɔnten so a wɔde di dwuma wɔ ɔkwan a ɛkɔ akyiri so | Kwan |
| Dacromet a wɔfrɛ no Dacromet | 500 - 1000+ Nnɔnhwerew | Nnuruyɛ afifide, mpoano mmeae | Soro |
| Ruspert na ɔkyerɛwee | 1000+ Nnɔnhwerew | Nneɛma a atwa yɛn ho ahyia a ɛyɛ hyew kɛse | Ntetohɔ |
Hyɛ no nsow: Wɔ mpoano adekoradan anaa nnuruyɛ adwumayɛbea ahorow ho no, yɛkamfo Dacromet anaa Ruspert a wɔde kata so kyerɛ denneennen. Standard galvanized screws bɛma rust na ayɛ "nsu kɔkɔɔ" wɔ asram asia mu wɔ saa tebea horow yi mu.
3. EPDM Washers: Ɔkwan a Etwa To a Wɔde Bɔ Wɔn Ho Ban wɔ Nsu a Ɛtwetwe Ho
Nkuruwankuruwa pii a ne bo nyɛ den de rɔba hohoro mfiri a wɔtaa de di dwuma a ɛyɛ nyin na ɛyɛ den wɔ UV hann ase na edi dwuma.
High-Quality EPDM: Ɛsɛ sɛ ɛwɔ anti-UV additives. Ɛsɛ sɛ egyina ɔhyew a ɛyɛ digrii 120 ne awɔw a ɛyɛ digrii -40 ano a ɛnpaapae.
Vulcanization: Wɔde vulcanized (bonded) washer pa bi to dade washer no so na amma anhwe ase bere a wɔde rehyɛ mu no.
Kɔla a ɛne ne ho hyia: Wɔ kɔkɔɔ a ɛyɛ gyinapɛn akyi no, yɛde RAL kɔla-matched washers (sɛ nhwɛso no, Dark Green, White) ma sɛnea ɛbɛyɛ a ɛne wo dan atifi bɛfra yiye ama woawie a ɛyɛ fɛ.
4. Mfomso a Ɛtaa Ba & Nsɛm a Wɔayɛ ho Nhwehwɛmu
Mfomso: Sɛ wode #3 drill point bedi dwuma wɔ 5mm dade beam so.
Nea efi mu ba: Nkuruwankuruwa no pae wɔ tokuru no mu. Wontumi nyi mfi hɔ, na ɛhwehwɛ sɛ wɔsan tutu fam na wɔsɛe adwumayɛfo.
Mfomso: Wɔde Blue/White Zinc nkɔnsɔnkɔnsɔn a wɔtaa de di dwuma wɔ mmeae a acid wɔ.
Nea efi mu ba: Nkannare kɔkɔɔ pue wɔ asram 3 ntam, na ɛma adetɔfo ka sɛ nsu a ɛretu wɔ ɔdan atifi no.
Mfomso: Sɛ wode high-torque impact driver bedi dwuma wɔ krataa a ɛyɛ tratraa screws so.
Nea efi mu ba: Nkɛntɛnso no yi nhama no fi hɔ anaasɛ ɛbubu EPDM washer no. Yɛhyɛ nyansa sɛ fa clutch-adjusted drill di dwuma.
5. Nsɛm a Wɔaboaboa Ano: Ɔkwan Bɛn so na Wɔkra Ntɛmntɛm?
Sɛ wopɛ sɛ wunya quote a eye sen biara ne ade a ɛfata a, yɛsrɛ sɛ fa nsɛm a edidi so yi ma:
Nea ɛyɛ den: Dade krataa a woretutu mu no mu duru yɛ dɛn?
Nneɛma a Atwa Yɛn Ho Ahyia: So adwuma no wɔ asase mu, po ho, anaasɛ ɛbɛn adwumayɛbea bi?
Kɔla: So wuhia skru ti no na ama ɛne RAL kɔla pɔtee bi ahyia?
Nsɛm a Wɔtaa Bisa (FAQ) .
Q1: Nsonsonoe bɛn na ɛwɔ self-drilling ne self-tapping screws ntam?
A: Self-drilling screws wɔ drill point a ɛtumi hyɛn dadeɛ mu tẽẽ a pilot tokuru biara nni mu. Self-tapping screws hwehwɛ sɛ wonya tokuru a wɔadi kan atu ansa na wɔde ahyɛ mu.
Q2: Mɛyɛ dɛn ahu sɛ EPDM washer yɛ papa?
A: Sɔhwɛ a ɛnyɛ den ne nsu a ɛrefɔw digrii 100 sɔhwɛ. High-quality EPDM kɔ so yɛ elastic wɔ nnɔnhwerew 2 a wɔanoa akyi, bere a劣质 rɔba bɛyɛ sticky anaasɛ mpaapaemu.
Q3: So wode nhwɛsode ahorow ma de sɔ hwɛ?
A: Yiw. Yɛde nhwɛsoɔ a ɛyɛ kwa a ɛfa standard specifications (sɛ nhwɛsoɔ, #14 x 1") ma sɛdeɛ ɛbɛyɛ a wobɛtumi asɔ ahwɛ wɔ w’adwuma beaeɛ ansa na woahyɛ bulk order.
