Abrégé

The present disclosure provides a method for manufacturing a cold drawing die for steel pipes. The method for manufacturing a cold drawing die for steel pipes comprises the following steps: collecting process parameters of a reference steel pipe in an actual cold-drawing manufacturing process; establishing a reference die simulation model on the basis of parameters of a reference die, and establishing a reference steel pipe simulation model on the basis of parameters of the reference steel pipe before cold drawing; meshing the reference steel pipe simulation model, and performing steel pipe cold-drawing finite element analysis to obtain a finite element basic model; and substituting initial parameters of a target die and initial parameters of a target steel pipe into the finite element basic model for performing cold-drawing finite element analysis, and improving the initial parameters of the target die by taking product quality parameters as an optimization target to obtain optimization parameters of the target die, thereby obtaining a simulation model of the target die. Compared with the demand for a large number of die trials in the prior art, the method for manufacturing a cold drawing die for steel pipes of the present disclosure can reduce production costs.

Classes IPC  ?

• G06F 30/23 - Optimisation, vérification ou simulation de l’objet conçu utilisant les méthodes des éléments finis [MEF] ou les méthodes à différences finies [MDF]
• G06F 30/12 - CAO géométrique caractérisée par des moyens d’entrée spécialement adaptés à la CAO, p. ex. interfaces utilisateur graphiques [UIG] spécialement adaptées à la CAO

Abrégé

A single-driving type telescopic hydraulic cylinder without a core tube, comprising a cylinder barrel (4), a piston rod (5), a piston (3), a gland (15), a guide sleeve (14), and a cylinder arm pin interlocking structure (12). An oil inlet pipe (5-1) and an oil return pipe (5-2) are mounted in the piston rod (5); the oil inlet pipe (5-1) is communicated with a rodless cavity oil port A and a rodless cavity, and the oil return pipe (5-2) is communicated with a rod cavity oil port B and a rod cavity; an oil pipe base (1) is mounted at the bottom of the cylinder barrel (4); an outer oil pipe (11) communicated with an oil channel of the oil pipe base (1) is fixed outside the cylinder barrel (4); a front cavity oil pipe joint (16) communicated with the rod cavity is mounted at a front end of the cylinder barrel (4); a valve support (21) is mounted outside the cylinder barrel (4), and a control valve for controlling the cylinder arm pin interlocking structure (12) is mounted on the valve support (21); the port A of the control valve is connected to the outer oil pipe (11), and the port B of the control valve is connected to the front cavity oil pipe joint (16). A driving single-cylinder bolt structure can be implemented inside the hydraulic cylinder having a small cylinder diameter and rod diameter, without requiring complicated internal structure design of the piston rod (5); the processing difficulty and cost of the piston rod (5) are reduced, the space occupied by core tubes in the piston rod (5) is reduced, the weight is reduced, and a lightweight requirement is satisfied.

Classes IPC  ?

• B66C 23/693 - Flèches télescopiques pendant le fonctionnement extensibles par la pression d'un fluide