Method for manufacturing silencers for automotive air conditioners

Abstract

The invention discloses a method for manufacturing silencers for automotive air conditioners, which comprises the following steps: 1) blanking; 2) end-flattening and passivating; 3) grinding workpieces; 4) extruding a U-shaped blank; 5) end-flattening the U-shaped blank; 6) manufacturing partition plate accessories of a chamber; 7) manufacturing accessories of a silencing tube; 8) synthesizing the accessories; 9) machining the workpieces; 10) synthesizing through argon arc welding; 11) finishing burrs; 12) carrying out airtight leakage detecting; 13) cleaning and drying; and 14) inspecting, packing 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: after U-shaped die blanks are formed through carrying out cold extrusion moulding on bar stocks, a silencer is formed through machining the U-shaped die blanks by using a blank component machine, and the product size and process design factors can be accurately controlled; a silencer product is good in appearance mirror image and not required to be repaired; a silencer product is strong in specification and shape controllability and good in physical and chemical properties, and the process conforms to the requirements of product process design; 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, energy-saving, environmental-friendly, safe and reliable.

Description

technical field [0001] The invention relates to a method for manufacturing a vehicle air conditioner muffler. Background technique [0002] In the manufacturing method of the vehicle air conditioner muffler (multi-cavity resonance type), for the forming technology of the U-shaped mold blank, the existing process mainly adopts the casting mold blank hinged and machined, and then manually welded and synthesized (inner cavity accessories are preset) For the product, except for the controllable height (or length) size and shape of the product, the rest of the process design elements cannot be controlled. Because the workpiece material is melted and cast at high temperature, the physical and chemical properties of the product change (molecular grain reorganization, over-burning, impurities embrittlement, etc.), unable to adapt to the process design requirements of the product; low production rate (average 1PCS / 80min, daily shift output ≤400pcs / 8h), high production cost (unit cost...

AI Technical Summary

Problems solved by technology

[0002] In the manufacturing method of the vehicle air conditioner muffler (multi-cavity resonance type), for the forming technology of the U-shaped mold blank, the existing process mainly adopts the casting mold blank hinged and machined, and then manually welded and synthesized (inner cavity accessories are preset) For the product, except for the controllable height (or length) size and shape of the product, the rest of the process design elements cannot be controlled. Because the workpiece material is melted and cast at high temperature, the physical and chemical properties of the product change (molecular grain reorganization, over-burning, impurities embrittlement, etc.), unable to adapt to the process design requirements of the product; low production rate (average 1PCS / 80min, daily shift output ≤400pcs / 8h), high production cost (unit cost raw material waste rate ≥800%×2); and High scrap rate (process PPM ≥ 15000), serious waste of resources; belongs to seriously backward, aging, high-cost production process