Progressive-die forming die for automobile suspension control arm lower piece

Abstract

The invention belongs to the technical field of progressive dies and relates to a progressive-die forming die for an automobile suspension control arm lower piece. The progressive-die forming die comprises an upper die, a lower die, an inclined punching tool and a drawing tool, the inclined punching tool and the drawing tool are arranged between the upper die and the lower die, a plurality of feeding guide components are fixed on two lateral sides of a material belt moving track on the upper surface of the lower die at intervals along the material belt moving direction respectively, and stable and quick conveying of a material belt is realized; a nitrogen cylinder is arranged on each of an upper die seat and a lower die seat, so that buffering effect during drawing is enabled to be better; a wedge driving block is arranged on the lower die and matched with a sliding block with a punching head, so that side punching of a side hole punching process is realized. The progressive-die forming die is suitable for a progressive die processed by completing a series of different punching processes in a stroke of a punching machine each time.

Description

technical field [0001] The invention belongs to the technical field of progressive dies, in particular to a progressive die forming die for the lower piece of an automobile suspension control arm. Background technique [0002] Progressive die (also called continuous die) is composed of multiple stations, and each station is connected in sequence to complete different processing. A series of different stamping processes are completed in one stroke of the punch press. After one stroke is completed, the punch is fed. The machine moves the material forward according to a fixed step distance, so that multiple processes can be completed on a pair of molds, generally including punching, blanking, bending, trimming, stretching and other processes, which are safe and easy to operate. It has the characteristics of automation, high-speed punch production, reduced punch and site area, reduced transportation and warehouse occupation of semi-finished products, and high productivity. Howev...

AI Technical Summary

Problems solved by technology

[0002] Progressive die (also called continuous die) is composed of multiple stations, and each station is connected in sequence to complete different processing. A series of different stamping processes are completed in one stroke of the punch press. After one stroke is completed, the punch is fed. The machine moves the material forward according to a fixed step distance, so that multiple processes can be completed on a pair of molds, generally including punching, blanking, bending, trimming, stretching and other processes, which are safe and easy to operate. It has the characteristics of automation, high-speed punch production, reduced punch and site area, reduced transportation and warehouse occupation of semi-finished products, and high productivity. However, in practice, due to the different structures of the workpieces to be processed, there are still some shortcomings in some processes: one is the material belt The movement on the progressive die is unstable and the conveying speed is slow: when the material belt moves from back to front due to the change of station on the progressive die, in order to maintain a stable axial movement, the two sides of the material belt moving track There are several guide blocks on the lower mold, but because the guide blocks are fixed, when the material belt moves forward on each station, due to friction: it will cause loud noise, slow down the conveying speed, and produce metal Broken pins and poor running track directly affect the quality of processed products; second, when the punch punches the hole on the inclined surface of the workpiece from top to bottom, the punched hole cannot meet the requirements: see Figure 10 : because some of the punching positions on the lower plate 81 of the automobile suspension control arm are on the side surface 82 after bending, the moving direction of the punch 83 on the punching machine or the moving direction of the punching head 83 driven by the punching machine is generally up and down Direction (shown by the arrow in the figure), so that the punch 83 in the up and down direction punches the punching hole 84 on the side surface of the workpiece, so that the inner surface 85 of the through hole 84 punched on the side surface 82 of the workpiece is not perpendicular to the side surface of the workpiece 82, but has a certain angle A, which does not meet the design requirements for the through hole on the workpiece. At the same time, it will also produce lateral stress concentration on the workpiece side surface 82 and accelerate the twisting damage of the punch by lateral force; the third is the automobile The shape of the punching hole on the slope of the lower plate of the suspension control arm is a narrow strip-shaped sheet type, while the strip-shaped sheet-type punch has a high height, poor stability during work, and low service life. Poor: see Figure 13 : the punching die of the ultra-thin strip hole in the progressive die is made up of the punching sheet 101 in the middle, the guard plate 102 on both sides of the punching sheet 101, the base plate 103 on the lower side of the punching sheet 101 and the guard plate 102, the punching sheet 101 The thickness L1 is about 3-7mm, and the height H2 is about 70-100mm. Due to the thinner thickness and higher height of the punching sheet 101, it is easy to be deformed or even broken due to the loose clamping of the guard plate 102 during work, and then punching The mold is composed of punching plate, guard plate and bottom plate. It has many accessories, high manufacturing cost, troublesome disassembly and maintenance. In addition, the sum of the thickness of punching plate and guard plate is the same as the thickness L2 of the bottom plate, which is not conducive to installation; four is Since the multiple processes of the progressive die use a punching machine to punch the strips in multiple processes at the same time, the pressure of the punching machine is relatively high, and the punching force is hard, which is not conducive to the drawing of the metal strip in the drawing process. For forming, even if a one-way nitrogen cylinder buffer is installed on the upper mold or the lower mold, cracks and deformation will occur due to excessive stress concentration, which will result in a high defective rate of the molded product

Images