Special hydraulic press for bulging pressing forming of automobile axle housing and pressing forming method

Patent metadata

Field	Value
Publication number	US-11801653-B2
Application number	US-202017013777-A
Country	US
Kind code	B2
Filing date	Sep 7, 2020
Priority date	Nov 5, 2019
Publication date	Oct 31, 2023
Grant date	Oct 31, 2023

Abstract

The present invention discloses a special hydraulic press for bulging pressing forming of an automobile axle housing and a pressing forming method. A hydraulic press body is a closed frame consisting of an upper cross beam, a lower cross beam, four stand columns I, II, III, and IV, four vertical pull rods I, II, III, and IV, and four transverse pull rods I, II, III, and IV, and is used for balancing a deformation force up to 3000 T in the vertical direction or the horizontal direction in the pressing forming process. During pressing forming, the downward speeds of a main hydraulic cylinder, small left and right vertical hydraulic cylinders are precisely controlled to prevent the left end, the right end and the middle of the tube blank from bending.

First claim

What is claimed is:

1. A hydraulic press for bulging pressing forming of an automobile axle housing, comprising a hydraulic system, an electrical system, a pressurization system, front and rear high-pressure jacks, and a pressing forming die, the pressing forming die comprises an upper die, a lower die, a front die, a rear die, a left pressing head, a right pressing head, an upper die base and a lower die base,
wherein a lower cross beam is an inverted T-shaped case structure, an upper cross beam is a T-shaped case structure, front and rear ends of left and right stepped surfaces of the lower cross beam and the upper cross beam are respectively supported by four stand columns to form a closed frame structure, the upper cross beam and the lower cross beam are respectively connected in a vertical direction by four vertical pull rods for balancing external forces applied to the upper cross beam and the lower cross beam in the vertical direction when the hydraulic press is operating, and the upper cross beam and the lower cross beam are respectively connected to upper end parts and lower end parts of the four stand columns in a horizontal direction by four transverse pull rods for balancing external forces applied to the four stand columns in a left-right direction when the hydraulic press is operating the four stand columns comprising two left stand columns and two right stand columns
a main hydraulic cylinder is mounted upside down on the upper cross beam, a lower end of a piston rod of the main hydraulic cylinder is connected to the top surface of a main slider by a flange, the main slider is connected to the upper die base, and the main hydraulic cylinder drives the upper die base and the upper die to move in the vertical direction;
a left vertical slider is located between the two left stand columns, a right vertical slider is located between the two right stand columns, the left vertical slider is movable in the vertical direction between the two left stand columns, the right vertical slider is movable in the vertical direction between the two right stand columns, the bottom surfaces of the left vertical slider and the right vertical slider are respectively connected to piston rods of a left vertical hydraulic cylinder and a right vertical hydraulic cylinder, and the cylinder bottoms of the left vertical hydraulic cylinder and the right vertical hydraulic cylinder are respectively mounted in the middle of the left stepped surface and the right stepped surface of the lower cross beam;
a left horizontal hydraulic cylinder and a right horizontal hydraulic cylinder are respectively mounted in the middle of inner sides of the left vertical slider and the right vertical slider, and guide sleeves are respectively disposed on the upper part and lower part of the left vertical slider and the right vertical slider;
piston rods of the left horizontal hydraulic cylinder and the right horizontal hydraulic cylinder are respectively connected to a left horizontal slider and a right horizontal slider so as to drive the left pressing head and the right pressing head to move leftwards and rightwards in the horizontal direction, left guide rods and right guide rods are respectively provided at the upper part and lower part of the left horizontal slider and the right horizontal slider, and the left guide rods and IV and the right guide rods slide in the guide sleeves are respectively disposed in the left vertical slider and the right vertical slider; and
a worktable is mounted in the middle of an upper plane of the lower cross beam, and the lower die base is mounted in an upper plane of the worktable.

2. The hydraulic press for bulging pressing forming of an automobile axle housing according to claim 1 , wherein the upper die base is an inverted-U-shaped structure, the upper die is mounted in a lower plane of the pedestal of the upper die base, the lower die base is an LT-shaped structure, the front and rear high-pressure jacks are mounted on inner side walls of the U-shaped structure, the lower die is mounted in the middle of the upper plane of the pedestal of the U-shaped structure, and the front die and the rear die are mounted on front and rear sides of the lower die.

3. The hydraulic press for bulging pressing forming of an automobile axle housing according to claim 2 , wherein the front and rear high-pressure jacks drive the front die and the rear die to press a preformed tube blank from front side and rear side to center of the lower die base on the upper plane.

4. The hydraulic press for bulging pressing forming of an automobile axle housing according to claim 1 , wherein the front and rear high-pressure jacks drive the front die and the rear die to press a preformed tube blank from front side and rear side to center of the lower die base on the upper plane.

5. The hydraulic press for bulging pressing forming of an automobile axle housing according to claim 1 , wherein the pressurization system is formed by a low-pressure pressurizer, a high-pressure pressurizer and a high-pressure relief valve.

6. A forming method of pressing an automobile axle housing by a hydraulic press for bulging pressing forming of an automobile axle housing, wherein the forming method comprises the following steps:
a. placing a preformed tube blank of an automobile axle housing in a die cavity of a lower die, the preformed tube blank being accurately positioned in a left-right direction and a front-rear direction;
b. operating a left and a right horizontal hydraulic cylinders of the hydraulic press so as to drive a left pressing head and a right pressing head to perform a working feed from outside to inside through left and right horizontal sliders, thereby sealing left and right end parts of the preformed tube blank;
c. operating a front and a rear high-pressure jacks so as to drive a front die and a rear die to press the preformed tube blank from front side and rear side to center of the lower die base, until an inner side planes of left and right end parts of the front die and the rear die contact outside surfaces at the left and right ends of the lower die;
d. operating a main hydraulic cylinder of the hydraulic press so as to drive an upper die base through a main slider to move downward and stop until a die cavity of an upper die contacts an upper curved surface of the preformed tube blank;
e. filling the preformed tube blank with a liquid through a left pressing head by using a low-pressure pressurizer of a pressurization system, and stopping filling the liquid when the pressure inside the preformed tube blank reaches a pressure p 0 =6 MPa to 20 MPa;
f. operating the main hydraulic cylinder of the hydraulic press so as to drive the upper die to press downward the preformed tube blank at a speed v 1 , simultaneously driving, by left and right vertical hydraulic cylinders, left and right vertical sliders to move downward at a speed v 2 , stopping the pressing of the upper die when a distance between two end surfaces of the upper die and two end surfaces of the lower die reaches b 0 , and keeping the pressure p 0 inside the preformed tube blank unchanged in the pressing process;
g. filling the preformed tube blank with the liquid through a right pressing head by using a high-pressure pressurizer of the pressurization system, and stopping filling the liquid when the pressure inside the preformed tube blank reaches a pressure p 1 =60 MPa to 120 MPa;
h. operating a relief valve of the pressurization system mounted on the right pressing head so as to unload the high-pressure liquid inside the preformed tube blank;
i. making the left and right horizontal hydraulic cylinders of the hydraulic press return so as to detach the left pressing head and the right pressing head from the end parts of the preformed tube blank;
j. driving, by the m

Assignees

• Qinhuangdao Tongqiao Tech Co Ltd
• Univ Yanshan

Inventors

• Wang Liandong
• Liang Chen
• Ma Lei
• Wang Xiaodi
• Song Xiliang
• Yang Dongfeng
• Wu Na
• Zhang Jiaqi
• Deng Hailing

Classifications

• B30B1/34 Primary

  involving a plurality of plungers acting on the platen (gas operated B30B1/38) · CPC title

• B21D26/043 Primary

  Means for controlling the axial pusher · CPC title

• B21D37/10

  Die sets; Pillar guides · CPC title

• B21D53/90

  axle-housings · CPC title

• B30B9/28

  for forming shaped articles (from material in powder, granular, or paste form, e.g. briquetting presses B30B11/00) · CPC title