Siemens NX CAM Essential Training (Hindi)

FLOOR AND WALL OPERATION

•Use the mill_planar operation type to machine parts with vertical walls or walls that are parallel to the tool axis.

•Boundaries are used to contain many tool paths. The tool path may cut with a single pass, multiple passes, or the entire interior of a pocket.

•In this example, a blank boundary defines the material to be removed and the part boundary defines the finished part. The floor plane defines the final depth of the tool path. Check and trim boundaries can also be used to further contain the tool path.

Face Milling with boundaries

Use Face Milling operations to machine planar faces.

When creating a Face Milling operation, you must select faces, curves or points to define the planar boundaries normal to the tool axis at the levels to be cut. Because Face Milling removes material in planar levels with respect to the tool axis, the faces that are not planar and perpendicular to the tool axis are ignored.

FLOOR WALL IPW

Use the Floor Wall or Floor Wall IPW operation subtypes to efficiently machine prismatic parts and features.

Use the Floor Wall operation for basic floor and wall milling on prismatic parts.

Use the Floor Wall IPW operation for floor and wall milling of prismatic parts when using an in-process workpiece (IPW) to keep track of uncut material.

When you use these operations, you can:

Machine floors, walls, and floor and wall combinations simultaneously.

Machine walls and tapered walls that are not bounded by floor geometry.

Planar Profile

Use Planar Profile to create tool paths along vertical walls and when using User Defined Mill tools.

User Defined Mill tools are allowed when using Planar Profile.

Only a single pass is allowed.

Planar Profile determines cuts regions by cut shapes, and each cut shape represents a different cut region.

Planar milling

Use the mill planar operation type to machine parts with vertical walls or walls that are parallel to the tool axis.

Boundaries are used to contain many tool paths. The tool path may cut with a single pass, multiple passes, or the entire interior of a pocket.

In a planar mill operation, you can:

Create boundaries from faces, edges, curves, and points to contain the tool path.

Select the floor plane as the final depth of the tool path.

Select cut levels using different methods that are unique to planar mill operations.

Remove material as a cut volume using pocketing methods or by creating profile cuts along the part boundaries.

Planar Text

Use the Planar Text operation to engrave drafting text directly on a planar surface.

Part numbers and mold cavity ID numbers are examples of drafting text that is commonly engraved.

You must create the drafting text in a plane parallel to the floor plane.

The software projects the text along the tool axis to the floor plane.

Groove Milling operation

Use the Groove Milling operation to machine linear grooves, slots, and clevises using T-Cutters.

The operation provides several strategies to sequence the cutting passes, and automatically changes the tracking point for top and bottom cutting.

You can efficiently use multiple operations to rough and finish machine the groove.

FACE MILLING MANUAL

Use the Manual cut pattern option when the provided cut patterns do not meet your requirements.

In certain situations, you may be able to create a more efficient tool path using this option.

You can:

Re-generate the copied operation.

Edit a manual cut pattern as necessary.

Transform or create an instance of a manual cut pattern operation.

Cavity Milling

Use Cavity Mill operations to remove large volumes of material.

Cavity milling is ideal for rough-cutting parts, such as dies, castings, and forgings.

Cavity Mill operations remove material in planar levels that are perpendicular to a fixed tool axis. Part Geometry can be planar or contoured.

Use Cavity Mill operations to remove large volumes of material.

Cavity milling is ideal for rough-cutting parts, such as dies, castings, and forgings.

Cavity Mill operations remove material in planar levels that are perpendicular to a fixed tool axis. Part Geometry can be planar or contoured.

Adaptive Milling

Adaptive milling operations are a good choice when milling hard materials at high speeds, resulting in higher productivity and longer tool life.

Path settings

Adaptive milling uses a deeper depth of cut and a smaller stepover than more traditional cutting strategies. This allows heat to be dissipated in the chips rather than being absorbed by the cutting tool, which helps reduce wear and improves performance at high speeds.

Stepover is set to Percent of Flat Diameter = 7.0000 by default.

Common Depth per Cut is set to 200.0000 %Tool by default.

PLUNGE MILLING

Plunge Milling is a unique milling operation that is best used in deep areas that require a long tool. Successive plunge motions take advantage of the increased rigidity when a tool moves along the Z-axis to efficiently rough out large volumes of blank material.

The distinctive characteristics of Plunge Milling are:

It roughs out material.

It cuts down the tool axis.

When there are multiple regions, Plunge Milling starts at the deepest plunge depth.

Rest Milling

This operation subtype is customized to cut the material remaining from the in-process workpiece that a previous tool could not reach, due to its diameter and corner radius.

Z LEVEL PROFILE

Use Z-Level Milling for fixed-axis semi-finishing and finishing. Z-Level Milling removes material in planar levels that are perpendicular to a fixed tool axis. Cutting is completed at a constant Z level before moving on to the next Z level.

Advantages to using Z-Level Milling instead of Cavity Milling

In some cases, Cavity Milling with a Profile cut pattern can produce a similar tool path. However, Zlevel Milling has the following advantages for semi-finishing and finishing:

It does not require blank geometry.

It has steep containment.

It orders by shape when cutting depth first. This means that all levels on an island part shape are cut before moving to the next island.

Z LEVEL CORNER

}This operation subtype is customized to finish the corner areas that a previous tool could not reach due to its diameter and corner radius.

Boundary drive method (FIXED_CONTOUR)

The Boundary drive method enables you to define cut regions by specifying Boundaries and containment Loops. Boundaries are not dependent on the shape and size of the Part Surfaces while Loops must correspond to exterior Part Surface edges. Cut regions are defined by Boundaries, Loops, or a combination of both.

Area drive method

Use the Area Milling drive method to create a fixed axis tool path along contoured faces. The Area Milling drive method creates drive points along selected faces, and then uses the drive points to follow the part geometry. The cut area must be included in the part geometry.

Area drive method (CONTOUR AREA)

Non Steep Containment

Steep Containment restricts the cut area based on the steepness of the tool path. It is used to control scallop height and avoid plunging the tool into the material on steep surfaces.

Steep Angle enables you to determine when the system recognizes Part surfaces as being steep. For example, a flat surface has a steep angle of zero and a vertical wall has a steep angle of 90 degrees.

RADIAL CUT DRIVE

The Radial Boundary dialog allows you to select permanent boundaries for the operation and is only displayed if permanent boundaries currently exist in your part. If multiple Boundaries are defined, a lift is applied, allowing the tool to traverse from boundary to the next.

Spiral drive method

The Spiral drive method enables you to define Drive Points that spiral outward from a specified center point. The drive points are created within the plane normal to the projection vector and containing the center point. The Drive Points are then projected on to the selected part surfaces along the projection vector.

STREAMLINE

The Streamline drive method builds an implied drive surface from the selected geometry. Streamline enables completely flexible tool path creation. A well ordered grid of regular faces is not required.

Surface Area drive method

The Surface Area drive method enables you to create an array of Drive Points that lie on a grid of Drive Surfaces. This Drive Method is useful in machining very complex surfaces requiring a variable Tool Axis. It provides additional control of both the Tool Axis and the Projection vector

CURVE POINT DRIVE METHOD

Use the Curve Point drive method to control the tool path motion by selecting curves, face edges, or points as the drive geometry. NX projects the drive geometry onto the part geometry, and then creates the tool path on the part geometry.

Flow Cut drive method

The Flow Cut drive method for surface contouring operations generates fixed axis tool paths that machine the corners and valleys formed by part surfaces. Use the Flow Cut drive method for:

High speed machining.

Removing excess material in corners prior to finishing.

Removing the uncut material left behind by a previous, larger ball or bull cutter.

Solid Profile 3D

Use the Solid Profile 3D operation to machine either the top or bottom edge of a vertical wall without selecting the individual edge chains. You can specify:

Multiple side or depth passes.

Bi-directional (Mixed) cutting

Collision checking.

Profile 3D

Use Profile 3D to profile an edge in 3D. This operation is commonly used to profile trim dies and punches.

Contour Text

Use the Contour Text operation or the Fixed Contour drive method Text to engrave drafting text, such as part numbers and mold cavity ID numbers, directly on a contoured surface. The operation is fully associative to the drafting text. Simply regenerate the operation to update the tool path.

The tool path for the operation:

Has one pass.

Follows the font strokes of the drafting text object.

Has a tool position of On.

SPOT DRILLING

Drills to the default depth value specified in the template. If the default tool depth would violate the part, NX reduces the depth to a safe value.

DRILLING

Drills with a basic Drill machine cycle, by default.

DEEP HOLE DRILLING

Uses drilling cycles that include the spindle, coolant, and feed rate controls that are required to drill deep holes. The in-process feature volume identifies any pilot hole or cross holes that have been previously machined.

COUNTERSINKING

Drills a diameter larger than the hole diameter. If a chamfer is not modeled on the hole feature, NX estimates an initial value.

TAPPING

Cuts threads in holes using a tapping tool. The major diameter of the tapping tool must equal the diameter of the feature to cut. All features to cut must have the same diameter.

SEQUENTIAL DRILLING

Use the Sequential Drilling operation to drill a sequence of coaxial holes with interruptions in the material. This example does not use chip break and slows the feed rate to 80% of the full cut rate before the tool enters or leaves material.

HOLE MILLING

Uses spiral, helical, circular, or a combination of spiral and helical cut patterns to machine blind and through holes.

HOLE CHAMFER MILLING

Mills a chamfer in a circular pattern with a chamfering tool.

BOSS MILLING

he following workflow is recommended to fully machine a threaded boss.

1. Recognize and group the features.

2. Mill the boss.

3. Thread the boss.

BOSS THREAD MILLING

RADIAL GROOVE MILLING

Combines groove milling and hole milling to machine a sequence of circular grooves with a T-cutter. The operation cuts in a circular pattern with multiple radial and axial passes

Feature-based machining

}In NX Manufacturing, a machining feature is any shape that is recognized by the software as machinable. Machining features you can select include standard shapes, such as holes, slots, and pockets, and user defined features created for irregularly shaped areas. You can do the following to create machining features:

}Identify existing modeling features.

}Recognize features by their parameters if there is geometry that NX cannot identify as a modeling feature.

}Recognize legacy holes, faces or pockets.

FACING

Roughing cuts used for facing the part toward the spindle center line.

ROUGH_TURN_OD

Roughing cuts used for turning the outside (OD) of the part parallel to the spindle center line.

GROOVE_OD

Rouging cuts used for machining grooves on the outside (OD) of the part. Many cut patterns for turning and plunging are available.

FINISH_TURN_OD

Automatically generates finish cuts for the outside (OD) of the part using various cut strategies.

Use Multi Blade Rough operations to create roughing operations for blade type parts.

Multi Blade Rough operations are part type specific roughing operations. The operations allow multi-level, multi-axis roughing for multi blade type parts.

Roughing is performed from the top down.

You can define the following:

Multi-level cutting

Cut patterns

Depths

You can increase the depth of cut in roughing passes by adding intermediate levels for embedded cuts.

Start point and cut direction

Tool axis lead/lag and tilt

Tool path and tool axis smoothing

Blank geometry or IPW for stock definition.

Use Blade Finish operations to finish blades and blade blends down to the hub. Blade Finish operations are part type specific finishing operations. The operations allow multi-axis finishing for the blade or splitter of multi blade type parts.

You can define:

• Sides to cut

• Cut patterns

• Cut levels

• Start point and cut direction

• Tool axis lead/lag and tilt

Use the Rotary Floor Finish drive method to finish the floors on cylindrical parts with a 4-axis tool path.

The following are supported:

• Ball mills, spherical mills, and end mills with a corner radius equal to the radius of the cutter

• Zig and Zigzag cut patterns

• Tool axis lead angle

• Tilting to avoid collisions

• Optimized sequencing with smooth stepovers

The Streamline drive method builds an implied drive surface from the selected geometry. Streamline enables completely flexible tool path creation. A well ordered grid of regular faces is not required.

The Surface Area drive method enables you to create an array of Drive Points that lie on a grid of Drive Surfaces. This Drive Method is useful in machining very complex surfaces requiring a variable Tool Axis. It provides additional control of both the Tool Axis and the Projection vector.

In this example, both the Projection Vector and the Tool Axis are variable and are defined as normal to the Drive Surface.

The Contour Profile Drive Method in Variable Axis Surface Contouring machines canted walls with the side of the cutter. Variable axis profiling lets you automatically generate a tool path to machine the walls of a cavity or a region bounded by floor(s) and wall(s), with the sides of the cutter. After selecting the floor, the software can find all the walls that bound the floor. The tool axis is constantly adjusted to get a smooth path.

Tool Path drive method enables you to define Drive Points along the Tool Path of a File Cutter Location Source File (CLSF) to create a similar Surface Contouring Tool Path in the current operation. Drive Points are generated along the existing Tool Path and then projected on to the selected Part Surfaces to create a new tool path that follows the surface contours. The direction in which the Drive Points are projected on to the Part Surfaces is determined by the Projection Vector. (CLSF)

Use the Curve Point drive method to control the tool path motion by selecting curves, face edges, or points as the drive geometry. NX projects the drive geometry onto the part geometry, and then creates the tool path on the part geometry.

When you select curves or edges, NX generates drive points along the selected curves and edges. The curves may be open or closed, contiguous or noncontiguous, planar or non-planar.

You can create a Variable Axis Guiding Curves multi-axis operation, where the cut pattern is driven by one or two guide curves. Variable guided curve operations are useful when you machine complex surfaces that include undercuts or double contact points.

Use the tube machining operations to machine complex inner surfaces, such as those found in combustion engine intake manifolds and cylinder heads.

The Tube Rough and Tube Finish operation types let you completely rough and finish machine the inside of a port from both sides. You can overlap the tool paths in the middle of the tube to assure full and smooth coverage of the surfaces.

Zlevel 5axis is a Z-Level Milling operation for multi-axis machines. Zlevel 5axis supports ball end mill tools and allows you to tilt the tool axis away from the part geometry to avoid shank/holder collisions.

Zlevel 5axis finishes steep, deep walls and corners with small fillets with a shorter tool instead of the longer small diameter tool required with a fixed axis operation. The higher feed-rates and chip-loads that are possible with a shorter tool increase productivity.