Improved non-die copy necking system and application of same in workpiece necking machining

Abstract

The invention belongs to a workpiece forming and machining device and particularly relates to an improved non-die copy necking system and application of the same in workpiece necking machining. The improved non-die copy necking system comprises a driving wheel, wherein a driven wheel is coaxially and parallelly arranged on one side of the driving wheel in a spaced mode, the spacing between the driven wheel and the driving wheel is controlled by a driven wheel ejection mechanism, the edge of the driving wheel and the edge of the driven wheel are matched with the appearance of a mouth part of a workpiece undergoing necking machining, a working platform is parallelly arranged on one side of the driving wheel and the driven wheel in a spaced mode, and a crank sliding block rotation mechanism makes the working platform rotate in the same plane in the radial direction of the driving wheel. A height adjusting device is arranged at the bottom of the working platform, two ends of a clamping mechanism are arranged on the upper side and the lower side of the working platform, the action executing end clamps a workpiece cavity, and a positioning mechanism matched with the appearance of the workpiece to be machined is arranged on the upper surface of the working platform. The technical problem that the workpiece necking machining requirement is difficult to meet is effectively solved, and the improved non-die copy necking system has the advantages of better meeting the workpiece machining requirement and being ingenious in design, easy to control automatically and the like.

Description

technical field [0001] The invention belongs to workpiece molding processing equipment, in particular to an improved no-profile necking system and its application in workpiece necking processing. Background technique [0002] The necking process is a forming process that shrinks the mouth of pre-stretched square and round blanks and pipe fittings through a necking die. The range of products processed by the necking process is relatively wide, mainly including metal container heads, bullet casings, shell casings, steel gas cylinders, bicycle frame risers, bicycle seat saddle pipes, steel pipe drawing, etc. [0003] For some metal container heads, embedded girth welding is required. However, there are following technical defects in the necking equipment that is profiling in the market: first, it cannot process workpieces of various specifications (it needs to make molds of corresponding specifications according to the size of the workpiece); It is that the shrinking quality i...

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Problems solved by technology

[0003] For some metal container heads, embedded girth welding is required. However, there are following technical defects in the necking equipment that is profiling in the market: first, it cannot process workpieces of various specifications (it needs to make molds of corresponding specifications according to the size of the workpiece); The first is that the quality of the necking is poor and the yield is low; the third is that the processing efficiency is low

The main problems in the above-mentioned prior art are that the rotation control servo motor and the movement control servo motor need program control, the degree of cooperation is poor, the rotation continuity of the workpiece is low, and the blank is easily deformed longitudinally at the fillet during the necking process , affect the product quality after shrinking processing, and then affect the sealing effect of metal containers

The second is that the power device and the linear moving device are controlled by a servo motor. To complete the action, the program needs to be programmed corresponding to the size of the blank. The operation is inconvenient and the processing efficiency is low; the third is that the workpiece is prone to lateral and longitudinal displacement on the working platform; the fourth is clamping The mechanism adopts hydraulic cylinder, which has high cost and complex structure

There are problems in this prior art. The first is that specific sliders need to be made according to the specifications of the parts, and the cost of processing different specifications and special-shaped workpieces is relatively high; The workpiece moves downward with the wedge-shaped mandrel, and the wedge-shaped mandrel spreads three sliders, and the three sliders contact the inner wall of the workpiece side, and the rollers perform full-circle rolling on the workpiece

The head and box of the traditional hydraulic oil tank adopt the embedded seam welding process, which has the following problems: First, there is no reliable non-destructive testing method at present, and the welding quality can only be checked by process samples and destructive tests; The tensile strength and fatigue strength of the joints are low; the third is that the seam welding equipment has a large power, a large investment in equipment, and difficult maintenance, and the high-power welding machine produces a large load on the power grid

Existing necking equipment cannot meet its production needs

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