How to get the dimensional accuracy of parts

(1) Trial Cutting Method: First Cut A Small Part Of The Machining Surface, Measure The Size Obtained By Trial Cutting, Adjust The Position Of The Tool Cutting Edge Relative To The Workpiece According To The Machining Requirements, Then Try Cutting Measure Again. After Two Three Trial Cutting Measurement, When The Machining Size Meets The Requirements, Cut The Entire Machining Surface. The Trial Cutting Method Is Repeated Through "Trial Cutting-Measurement-Adjustment-Trial Cutting" Until The Required Dimensional Accuracy Is Achieved. For Example, Trial Boring Of Box Hole System.

The Accuracy Achieved By The Trial Cutting Method May Be Very High, It Does Require Complex Equipment, But This Method Is Time-Consuming (Requires Multiple Adjustments, Trial Cutting, Measurement, Calculation), Inefficient, Dependent On The Worker's Technical Level The Accuracy Of The Measuring Instrument. The Quality Is Unstable, So It Is Only Used For Single-Piece Small-Batch Production. As A Type Of Trial Cutting Method, Matching, It Is A Method Of Processing Another Workpiece That Matches The Machined Part Based On The Machined Part, Combining Two ( More) Workpieces Together For Processing. The Requirements For The Final Processed Size In Matching Are Based On The Matching Requirements With The Machined Part. Huiwen Zhizao Is A Machining Factory With More Than Ten Years Of CNC Machining Experience . It Has A Full Range Of Equipment, CNC Turning/Milling/Grinding/Drilling/Machining. Partners With Parts Processing Needs Are Welcome To Call Us For Quotes.

(2) Adjustment Method: Use Samples Standard Parts To Adjust The Exact Relative Positions Of The Machine Tool, Fixture, Tool Workpiece In Advance To Ensure The Dimensional Accuracy Of The Workpiece. Because The Size Is Adjusted In Place In Advance, There Is No Need For Trial Cutting During Processing. The Size Is Automatically Obtained Remains Unchanged During The Processing Of A Batch Of Parts. This Is The Adjustment Method. For Example, When Using A Milling Machine Fixture, The Position Of The Tool Is Determined By The Tool Setting Block. The Essence Of The Adjustment Method Is To Use The Fixed-Range Device Tool Setting Device On The Machine Tool A Pre-Adjusted Tool Holder To Make The Tool Reach A Certain Position Accuracy Relative To The Machine Tool Fixture, Then Process A Batch Of Workpieces. Feeding The Tool According To The Dial Then Cutting On The Machine Tool Is Also A Type Of Adjustment Method. This Method Requires First Determining The Scale On The Dial According To The Trial Cutting Method. In Mass Production, Fixed-Range Blocks, Samples, Templates Other Tool Setting Devices Are Often Used For Adjustment. The Adjustment Method Has Better Processing Accuracy Stability Than The Trial Cutting Method, Has Higher Productivity, Is As Demanding On Machine Tool Operators, But Is More Demanding On Machine Tool Adjusters. It Is Often Used In Batch Production Mass Production.

(3) Fixed-Size Method: The Method Of Using The Corresponding Size Of The Tool To Ensure The Size Of The Processed Part Of The Workpiece Is Called The Fixed-Size Method. It Uses Standard-Sized Tools For Processing, The Size Of The Processed Surface Is Determined By The Tool Size. That Is, Tools With Certain Dimensional Accuracy (Such As Reamers, Reamer Drills, Drill Bits, Etc.) Are Used To Ensure The Accuracy Of The Processed Part Of The Workpiece (Such As Holes). The Fixed-Size Method Is Easy To Operate, Has High Productivity, Relatively Stable Processing Accuracy. It Is Almost Unrelated To The Technical Level Of The Workers. It Has High Productivity Is Widely Used In Various Types Of Production. For Example, Drilling Reaming.

(4) Active Measurement Method: During The Machining Process, The Machining Dimensions Are Measured While Machining, After Comparing The Measured Results With The Dimensions Required By The Design, The Machine Tool Is Either Allowed To Continue Working Stopped. This Is The Active Measurement Method. At Present, The Values In Active Measurement Can Be Displayed Digitally. The Active Measurement Method Adds The Measuring Device To The Process System (I.E., The Unity Of The Machine Tool, Tool, Fixture Workpiece), Becoming Its Fifth Factor. The Active Measurement Method Has Stable Quality High Productivity, Is The Development Direction.

(5) Automatic Control Method This Method Is Composed Of Measuring Devices, Feeding Devices Control Systems. It Combines The Measuring, Feeding Control Systems Into An Automatic Processing System, The Processing Process Is Completed Automatically By The System. A Series Of Tasks Such As Dimension Measurement, Tool Compensation Adjustment, Cutting Processing Machine Tool Parking Are Completed Automatically To Automatically Achieve The Required Dimensional Accuracy. For Example, When Processing On A CNC Machine Tool, The Parts Are Controlled By Various Instructions In The Program To Control The Processing Sequence Processing Accuracy.

There Are Two Specific Methods Of Automatic Control:

① Automatic Measurement Means That The Machine Tool Is Equipped With A Device That Automatically Measures The Size Of The Workpiece. When The Workpiece Reaches The Required Size, The Measuring Device Will Issue A Command To Automatically Retract The Tool Stop Working.

② Digital Control Means That The Machine Tool Has A Servo Motor, A Ball Screw Nut Pair A Complete Set Of Digital Control Devices To Control The Precise Movement Of The Tool Holder Worktable. The Acquisition Of The Size (The Movement Of The Tool Holder The Worktable) Is Automatically Controlled By A Pre-Programmed Program Through A Computer Digital Control Device. The Initial Automatic Control Method Was Completed Using Active Measurement Mechanical Hydraulic Control Systems. At Present, It Is Widely Used To Control Program-Controlled Machine Tools That Are Pre-Programmed According To Processing Requirements Work By Issuing Instructions The Control System Digital Control Machine Tools That Work By Issuing Digital Information Instructions The Control System, As Well As Adaptive Control Machine Tools That Can Adapt To Changes In Processing Conditions During Processing, Automatically Adjust Processing Quantities, Optimize The Processing Process According To Specified Conditions For Automatic Control Processing. The Automatic Control Method Has Stable Quality, High Productivity, Good Processing Flexibility, Can Adapt To The Production Of Multiple Varieties. It Is The Current Development Direction Of Mechanical Manufacturing The Basis Of Computer-Aided Manufacturing (CAM).

Huiwen Intelligent Manufacturing Takes CNC Machining Technology As Its Core Provides You With High-Quality Processing Manufacturing Services. We Have Perfect Manufacturing Capabilities Provide The Following Services Through The Integration Of Our Own Processing Capabilities Industry Manufacturing Resources:

Rapid Prototyping: Rapidly Manufacture Prototypes Through CNC, 3D Printing (SLA/SLS) Other Processes

CNC Machining : CNC Turning, Milling, Drilling, Grinding, Sheet Metal Processing  Other Processes ( CNC Machining Of Precision Parts )

Mould: Silicone Mould, Quick Mould, Formal Mould (Casting, Stamping, Extrusion, Injection Molding, Etc.)

Surface Treatment: Almost All Surface Treatment Effects Can Be Achieved