Patent ID: 11911840
Assignee: TAIYUAN UNIVERSITY OF TECHNOLOGY
Field: Machine tools (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 6:
7. A rolling method based on the continuous rolling device with interfacial temperature-force controllability for the seamless metal cladding pipe according to claim 6, comprising the following steps of:
S1: online heating and heat preservation: sheathing and assembling an outer pipe material and an inner pipe material to obtain a pre-sheathed blank, connecting the mandrel trolley with the mandrel, placing the pre-sheathed blank above the front rollgang, making the mandrel penetrate through the middle of the pre-sheathed blank through the mandrel trolley and sending the pre-sheathed blank into the online heating apparatus to heat to a target temperature T, and then sending the pre-sheathed blank into the multi-roller skew rolling mill set (1) for roll bonding;
S2: three-roller skew roll bonding: adjusting the tapered rolling roller and the guide plate of the multi-roller skew rolling mill set (1), setting a size of a target skew rolling hole pattern, starting the multi-roller skew rolling mill set (1), performing skew roll bonding on the pre-sheathed blank in the target skew rolling hole pattern surrounded by the mandrel, the roller and the guide plate jointly, making the pre-sheathed blank sequentially pass through the biting section, the screwdown section, the finishing section and the expanding section, so that a diameter is gradually reduced and a wall thickness is gradually reduced, so as to obtain the primary roll bonding blank, and making the primary roll bonding blank perform a rotary feeding motion under an action of skew roll bonding of the multi-roller skew rolling mill set (1) to enter the interfacial temperature-force controlled rolling mill set (2);
S3: controllable roll bonding: adjusting the controlled rolling roller (2023) of the interface pressure control module (202), setting a size of a target controlled rolling hole pattern and a target controlled rolling temperature, and measuring a temperature of an outer surface of the primary roll bonding blank by the thermometer (2011) located on an outlet side of the multi-roller skew rolling mill set (1), then adjusting on-off states of the annular water mist cooling apparatus (2012) and the electromagnetic induction heating apparatus (2013) to cool or heat the primary roll bonding blank to reach the target controlled rolling temperature, then rolling the primary roll bonding blank through the interface pressure control module (202) to realize high-strength metallurgical bonding of a bonded interface, so as to obtain the intermediate roll bonding blank, and then making the intermediate roll bonding blank enter the sizing and finishing mill set (3);
S4: sizing and finishing rolling: setting a working quantity of the sizing rolling mills and a size of a target sizing hole pattern in the sizing and finishing mill set (3), performing sizing and finishing rolling on the intermediate roll bonding blank to achieve target size accuracy and roundness to further improve a surface quality, so as to obtain a finally rolled seamless metal cladding pipe, and then sending the finally rolled seamless metal cladding pipe out from the rear rollgang; and
S5: heat treatment control: cutting off a head portion and a tail portion of the finally rolled seamless metal cladding pipe, cutting according to a certain size, and performing a heat treatment to obtain a target structure property, so as to obtain a finished seamless metal cladding pipe.