Liquid-filling pressing forming die for large-medium automotive axle case pipe fitting

Abstract

The invention discloses a liquid-filling pressing forming die for a large-medium automotive axle case pipe fitting. An upper die (10) and a lower die (17) of the die are respectively fixed on a U-shaped upper die seat (12) and a U-shaped lower die seat (18); front and rear side vertical arms (H, H') of the lower die seat (18) move on the inner side surfaces of front and rear side vertical arms (G, G') of the upper die seat (12); a front die (25) and a rear die (26) are driven by short-stroke hydraulic cylinders I and II (24, 24') fixed on the lower die seat (18) to carry out opposite synchronous pressing on a preformed pipe billet, and in the die closing process, cavities inside the front die (25) and the rear die (26) are totally in contact with the front and rear side surfaces of the upper die (10) and the lower die (17); a left pressure head (6) and a right pressure head (14) are driven by left and right sliding blocks of a hydraulic press to carry out left and right synchronous sealing on the end parts of the preformed pipe billet. The liquid-filling pressing forming die for the large-medium automotive axle case pipe fitting is used on the four-way hydraulic press, has independent actions in six directions, and is high in control accuracy, high in forming quality of the pipe fitting, reliable in die structure and convenient to blow down and pick up.

Description

technical field [0001] The invention belongs to the technical field of automobile manufacturing, and in particular relates to a large and medium-sized automobile axle housing tube filling hydraulic forming mold. Background technique [0002] The axle housing of the automobile drive axle is one of the main load-carrying components of the automobile, with complex geometry and high requirements for strength and rigidity. The automobile axle housing is a complex-shaped pipe, which is in the shape of a pipa with a small middle part on the left and right sides. At present, automobile axle housings are mainly manufactured by casting and stamping welding methods. Recently, a document has disclosed a steel pipe expansion and compression forming method for automobile axle housings: select a seamless steel pipe of a certain specification, first shrink its two ends, and then shrink the middle part. Perform hydraulic bulging to obtain a preformed tube blank, and finally carry out fillin...

AI Technical Summary

Problems solved by technology

image 3 The preformed tube blanks shown cannot be formed into figure 1 , figure 2 The main reasons for the axle housing pipe fittings shown are: ①The front module and the rear module involved in the disclosure are fixedly connected together by tie rods, which cannot resist the forming force of the pipe fittings as high as 1000T; ②The front module and the rear module are connected by tie rods They are fixedly connected together and cannot be moved, and the diameter of the round tubes on both sides of the bridge in the middle of the preformed tube blank is d 1 , greater than the gap value h between the front module and the rear module fixedly connected together 0 , so that the preformed tube blank needs to be reshaped in the front and rear directions before it can be put into the gap between the front module and the rear module; ③The pipe fittings after pressing cannot be taken out directly from the front module and the rear module, and the front module needs to be loosened , the connecting device between the rear modules

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