Manufacturing method of single cavity resonance type vehicle air conditioner muffler

Abstract

The invention discloses a method for manufacturing single-cavity resonance type silencers for automotive air conditioners, which comprises the following steps: 1) material preparing; 2) blunting; 3) grinding; 4) U-shaped blank extrusion; 5) U-shaped blank end-flattening; 6) necking processing; 7) workpiece machining; 8) burr finishing; 9) cleaning and drying; and 10) quality inspection, packaging and warehousing: carrying out final inspection on products subjected to cleaning and drying, and carrying out packaging and warehousing on qualified products. The method disclosed by the invention has the beneficial effects that: a silencer product is good in appearance mirror image, and the surfaces of workpieces can not be seriously damaged through squeezing and scratching, so repair is not needed; a silencer product is strong in specification and shape controllability and good in physical and chemical properties; the production rate is high, the production cost is low, and the rate of finished products is high; and the method is high in degree of automation and safe and reliable in operation.

Description

technical field [0001] The invention belongs to the field of automobile manufacturing, and in particular relates to a method for manufacturing a single-cavity resonance type vehicle air-conditioning muffler. Background technique [0002] The existing manufacturing method of the single-cavity resonant vehicle air-conditioning muffler mainly adopts the method of rolling the longitudinal pit at the mouth end (adding a hole size protection column in the cavity) to form the pipe end size of the product after the casting mold blank is reamed, and then passed Flat-mouth reaming trimming and forming, except for the product height (or length), other process design elements cannot be controlled. The clamping mold required by the rolling method clamps the workpiece with high strength, causing serious crushing and scratches on the surface of the workpiece. Repair; the face is monotonous, almost a uniform plane right angle, which cannot meet the design requirements of the product; the pr...

AI Technical Summary

Problems solved by technology

[0002] The existing manufacturing method of the single-cavity resonant vehicle air-conditioning muffler mainly adopts the method of rolling the longitudinal pit at the mouth end (adding a hole size protection column in the cavity) to form the pipe end size of the product after the casting mold blank is reamed, and then passed Flat-mouth reaming trimming and forming, except for the product height (or length), other process design elements cannot be controlled. The clamping mold required by the rolling method clamps the workpiece with high strength, causing serious crushing and scratches on the surface of the workpiece. Repair; the face is monotonous, almost a uniform plane right angle, which cannot meet the design requirements of the product; the production rate is low (average 1PCS / 100min, daily shift output ≤ 300pcs / 8h), high production cost [unit cost raw material waste rate ≥ 800 % (casting mold blank with large volume reamed into inner cavity)]; and high scrap rate (process PPM ≥ 15000), serious waste of resources