Stainless-steel Tee-pipe Moulding Process

{
  "publication_number": "US2022088660A1",
  "country": "US",
  "kind": "A1",
  "title": "Stainless-steel Tee-pipe Moulding Process",
  "abstract": "The present invention discloses a stainless-steel tee-pipe moulding process, cutting out a main pipe and a secondary pipe from the stainless-steel pipe to replace the copper tee-pipe to resolve the problem that the copper tee-pipe is easy to corrode and causes water pollution; meanwhile, the moulding process of the stainless-steel tee-pipe of the invention is different from the traditional integral forming process, and saves more materials and reduces the production cost compared with the traditional integral forming process.",
  "claims": [
    "1. A stainless-steel tee-pipe moulding process, wherein it comprises the following steps: S1, by taking a stainless-steel pipe as a processing raw material, cutting out a main pipe and a secondary pipe from the stainless-steel pipe; S2, flaring the bodies of the main and secondary pipes with a flaring apparatus; or necking two ports of the main pipe and one port of the secondary pipe with a necking apparatus; S3, carrying out thread treatment on the two ports of the main pipe and one port of the secondary pipe with a thread forming apparatus to form connecting threads; S4, forming a T-branch port on the body of the main pipe obtained after treatment in S3, meanwhile, cutting the other port of the secondary pipe to obtain a docking port matched with the T-branch port, and then welding the docking port of the secondary pipe with the T-branch port of the body of the main pipe to form a tee-pipe blank; and S5, carrying out surface electroplating on the tee-pipe blank obtained after treatment in S4 to form a tee-pipe end product. 2. The stainless-steel tee-pipe moulding process of claim 1, wherein after flaring the bodies of the main and secondary pipes in S2, two ports of the main pipe and one port of the secondary pipe are necked using a necking apparatus. 3. The stainless-steel tee-pipe moulding process of claim 1, wherein the flaring treatment in S2 comprises the following step of carrying out water swelling treatment on the main and secondary pipes via a water swelling die according to the pre-set swelling requirements; during the process, the two ports of the main pipe keep unchanged under the effect of the water swelling die, while its body is subjected to bidirectional water swelling and moulding from the two ports of the main pipe by virtue of a water swelling apparatus, or one port of the main pipe is subjected to unidirectional water swelling and moulding; the two ports of the secondary pipe keep unchanged under the effect of the water swelling die, while its body is subjected to bidirectional water swelling and moulding from the two ports of the secondary pipe by virtue of a water swelling apparatus, or one port of the secondary pipe is subjected to unidirectional water swelling and moulding. 4. The stainless-steel tee-pipe moulding process of claim 1, wherein the flaring treatment in S2 is carried out on the bodies of the main and secondary pipes respectively by an oil press and a pressure diffusing die for at least twice, the primary flaring ratio is 10%-15%, the secondary flaring ratio is 5%-8%; the necking treatment in S2 is carried out on the two ports of the main pipe and one port of the secondary pipes respectively by an oil press and a necking die for at least twice, the primary necking ratio is 10%-15%, the secondary necking ratio is 5%-8%. 5. The stainless-steel tee-pipe moulding process of claim 1, wherein the connecting threads formed in S3 are prepared into rolled threads via roll teeth. 6. The stainless-steel tee-pipe moulding process of claim 1, the connecting threads formed in S3 are prepared into sizing threads via a sizing mill and a sizing die. 7. The stainless-steel tee-pipe moulding process of claim 2, wherein the flaring treatment in S2 is carried out on the bodies of the main and secondary pipes respectively by an oil press and a pressure diffusing die for at least twice, the primary flaring ratio is 10%-15%, the secondary flaring ratio is 5%-8%; the necking treatment in S2 is carried out on the two ports of the main pipe and one port of the secondary pipes respectively by an oil press and a necking die for at least twice, the primary necking ratio is 10%-15%, the secondary necking ratio is 5%-8%."
  ],
  "description_excerpt": "The present invention relates to the technical field of pipeline preparation and moulding, in particular to a stainless-steel tee-pipe moulding process.\n\nA multi-way pipe like a tee-pipe, as the most important accessory in pipeline construction, is mainly used at the key branch of a main pipeline. The widely used tee-pipe is generally moulded by carrying out hammer forging on a pipe blank and then carrying out die forging. However, such processing has the defects of large blanking weight, high cost, and the quality of the blank subjected to hammer forging and the forged surface is inferior. Besides, the existing copper tee-pipe is easy to corrode when used in connection with a water pipe, and easily causes water source pollution.\n\nOne objective of the present disclosure is to overcome the shortcomings of the prior arts by providing a stainless-steel tee-pipe moulding process to resolve the problems mentioned above, that is, the copper tee-pipe is easy to corrode and causes water source pollution, and the existing tee-pipe processing has the problem of large blanking weight and high cost.",
  "cpc": [
    "B21C 37/29",
    "B21C 37/296",
    "B21D 26/033",
    "B21D 41/04",
    "B21H 3/02",
    "B21K 21/12",
    "B23P 11/022",
    "B23P 15/00",
    "B23P 2700/11",
    "F16L 41/021",
    "F16L 55/1608"
  ],
  "ipc": [
    "B21C 37/29"
  ],
  "assignees": [
    "Zhejiang Delifu Technology Co Ltd"
  ],
  "inventors": [
    "Guofei Wang"
  ],
  "filing_date": "2021-06-09",
  "publication_date": "2022-03-24",
  "priority_date": "2020-09-23",
  "application_number": "US-202117342997-A",
  "family_id": "74854919",
  "cited_by_count": 3,
  "citations": [
    "US1811501A",
    "US2238037A",
    "US2318707A",
    "US3064707A",
    "GB1449912A",
    "US6574849B1",
    "CN101260956A",
    "US20120038129A1",
    "KR101772966B1",
    "US20180312987A1"
  ]
}