Shaped parts four-axis parts machining structure characteristics difficulties

1. Description Of The Structural Characteristics Of Special-Shaped Parts Processing

As A Part Of The Flow Temperature Sensor, The Special-Shaped Part Includes Curved Surface, Special-Shaped Groove, Special-Shaped Mounting Seat, Circumferentially Distributed Connection Studs Mounting Holes, High Low Pressure Interfaces, Etc. The Structural Features Are Shown In Figure 1.

①High Low Pressure Pipe Interfaces The High Low Pressure Pipe Interfaces Are Distributed On The Curved Surface Of The Special-Shaped Parts. As The Airflow Enters The Equal Diameter Inlet Section, The Aperture Shrinks Becomes Smaller, The Roar Stage Transitions, The Faster The Gas Passes Through The Roar, The Smaller The Gas Flow Pressure Generated. On The Contrary, After The Aperture Expands Becomes Larger, The Roar Stage Transitions, The Slower The Gas Passes Through The Roar, The Greater The Gas Flow Pressure Generated.

② Fixed Installation Pillars: There Is One Fixed Installation Pillar In The High-Pressure Area One In The Low-Pressure Area. The Structural Dimensions Are Consistent The Center Position Is Processed With Safety Holes To Fix The Matching Parts.

③ Temperature Sensing Component Interface The Interface Size Is Connected To The Temperature Sensing Component, The Inner Hole Is Threaded, The Support Height Thread Depth Are Related To The Structure Of The Temperature Sensing Component, There Is A Safety Hole At 45° Behind The Temperature Sensing Component Interface. It Plays The Role Of Fixing The Matching Parts. Huiwen Zhizao Is A Machining Factory With More Than Ten Years Of CNC Machining Experience , With Complete Equipment, CNC Lathe/Milling/Grinding/Drilling/Machining. Partners With Parts Processing Needs Are Welcome To Call Us For Quotation.

④ Sealing Interface The Sealing Interface Is Divided Into An Inlet End An Outlet End, Both Are Connected To The Sealing Ring. The Processing Size Accuracy Requirements Are High To Ensure That There Is No Leakage Of Gas Flow At The Inlet Outlet Ends. Otherwise, The Inner Cavity Gas Flow Pressure Will Be Decompressed, Resulting In Inaccurate Airflow Pressure At The Output Ends Of The High Low Pressure Pipe Interfaces.

⑤Upper Lower Cover Plate Installation Grooves U-Shaped Grooves Are Evenly Distributed On The Inner Side Of The Front Back Platforms Of Special-Shaped Parts. Local Positions Are Connected To Welding Pillars Fixed Through Welding Processing Methods. After Forming, The Upper Lower Cover Plate Parts Are Tightened With Screws To Close The Components Connected To The Venturi Tube Other Test Products.

2. Analysis Of Processing Difficulties Programming Creation

In View Of The Pillar Interface Characteristics Of The Curved Surface Distribution Of The Special-Shaped Parts, Four-Axis CNC Programming Method Is Used For Processing, CATIA-CAM CNC Programming Software Is Used For Pre-Processing Program Compilation. The Analysis Of The Difficulties Of The Shape Structure Of The Parts During The Processing Of The Test Pieces Is Shown In Table 1. Content:

Table 1 Analysis Of Appearance Difficulties

The Clamping Method Of The Four-Axis Part Processing Process Adopts Mandrel Positioning. The Mandrel Is Clamped On The Rotating Worktable, The A-Axis Rotates To Drive The Part To Be Linked With The Spindle During The Processing. The Positioning Reference Of The Mandrel Refers To The Central Axis Of The Part Rotation. According To The Inner Cavity Structure Dimensional Tolerance Requirements Of The Special-Shaped Part, It Is Determined That The Working Surface Of The Mandrel The Inner Wall Of The Special-Shaped Part Are Well Fitted To Maintain The Circular Runout ≤ 0.01 The Coaxiality ≤ 0.02. In Terms Of Function, The Mandrel Provides Torque Through Static Friction To Ensure The Stability Of Cutting Processing; The Mandrel Provides Radial Support Force To Avoid Deformation Of The Thin Wall Of The Special-Shaped Part Caused By The Cutting Force. At The Same Time, The Roughness Of The Working Surface Of The Mandrel Should Be Above Ra0.8, The Surface Should Be Smooth Transitional, So As To Scratch The Inner Wall Of The Special-Shaped Part.