Ko'r perchinlar tortilmasligining nima muammosi bor?

Perchinlashning quyidagi ikki turi bo'lishi mumkin:

1. Teshik juda katta va perchinning diametri juda kichik va perchinning kengayishi yetarli emas.

2. Tortish mixining uzunligi juda qisqa bo'lib, uni perchinlab bo'lmaydi.

https://www.yukerivet.com/news/what-should-i-do-if-there-is-a-dislocation-between-the-zanglamaydigan-steel-plate-and-the-square-tube-with-countersunk-head-blind-rivets/