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How to Manage Speeds and Feeds in ESPRIT

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How to Manage Speeds and Feeds in ESPRIT How to Manage Speeds and Feeds in ESPRIT The calculation of optimum spindle speeds and tool feed rates must take into account numerous factors: • The type and hardness of the material being cut • The size, shape, and material of the cutting tool • The depth of cut • The shape of the tool path • The maximum amount of material in contact with the tool edge (tool burial) • The capabilities of the NC machine tool • The desired surface finish In ESPRIT, speeds and feeds can be programmed two ways: • Manually for each milling or turning operation • Automatically with calculated values from the Speed Feeds Manager in the ESPRIT KnowledgeBaseTM dptechnology.com 1 HOW TO MANAGEHOW TO SPEED Why use the Speed Feeds Manager? The Speed Feeds Manager stores all the information you need to automatically calculate the ideal speeds and feeds for your machining operations. Use the Speed Feeds Manager to define default cutting speeds and feed rates for milling and turning operations based on any combination of part material, tool material, and type of cut. When an operation is created, ESPRIT will combine the Speeds Feeds Standard selected in “KnowledgeBase Document Settings” with the actual tool and technology settings on the operation page to provide acceptable cutting speeds and feed rates. Option 1: Set speeds and feeds manually for each operation S With this method, the values for speeds and feed rates are entered manually for each machining operation. AND FEED The user has full control over the speed and feed values You need to look at the Speed Feeds table of your tool vendor for each operation No consistency since different parameters could be entered the next time speeds and feeds are defined S IN Option 2: Get speeds and feeds from the Speed Feeds Manager (local/remote database) E With this method, speed and feed data is created and stored in the KnowledgeBase. S P Consistency is maintained because all users are using the same database R IT Assuming the database is set up correctly and up to date, errors are reduced when values are loaded When the setting “Use Speed Feed KB” is set to Yes on the technology page, the computation of speeds and feeds is automatically handled by ESPRIT The Security (access) and backup of the database is handled by the KnowledgeBase Manager The database needs to be defined before any values can be calculated How to access the Speed Feeds Manager The Speed Feeds Manager in the KnowledgeBase Manager is the place to manage your Speed Feeds database. To open the KnowledgeBase Manager, do one of the following: • In ESPRIT, click Machining > Common Machining > KnowledgeBase Manager • From the Windows Start menu, click All Programs > DP Technology > ESPRIT > KnowledgeBase > KnowledgeBase Manager When sharing the database with other users, only one person at a time should update the KnowledgeBase. In the list of managers, select ‘Speed Feeds’. dptechnology.com 2 HOW TO MANAGEHOW TO SPEED A tab for ‘Speed Feeds’ will display. You can use the existing standard “Cut Data” from ESPRIT, but this is a generic database with multiple materials, conditions, types of cut and tool materials you may not use. In order to have an efficient Speed Feeds database, it is recommended that users create their own cutting standard with the material, types of cut, tool material, and speed/feed values that are actually used in the shop. Create a new cutting standard Since only one cutting standard can be used per ESPRIT document, it is recommended to create only one standard for your company. If you want to create multiple standards, you have to choose wisely what belongs in S each standard. AND FEED In the Speed Feeds Manager, click ‘Add Standard’. S IN E S P R IT Enter the name “My Company Standard” and click OK. Add material to the standard The definition of each part material is split into two categories: • Part Material Class • Part Material Condition The “Part Material Class” is the name of the Material you are cutting, for example “Steel”. The “Part Material Condition” corresponds usually to the Hardness of metal, of the way the metal is produced (die cast, wrought, forged, etc…), for example “HRC 20-32”. The fewer combinations between Material Class/Condition you have, the easier it will be to define your database. When you have no conditions for the material, just enter “None” as a material condition. dptechnology.com 3 HOW TO MANAGEHOW TO SPEED Click “Add Material Class”. S AND FEED Enter the name “Steel” and click OK. S IN E S P R IT Click “Add Material Condition”. Enter the name “None” and click OK. Add a Type of Cut to the standard The Type of Cut is a designation of the way the tool will cut the material, for example: Side Milling, Slotting, Drilling, Plunging, Threading, etc… The type of cut is independent from the Material Class; you do not have to define a Type of Cut for each Material Class/Condition. dptechnology.com 4 HOW TO MANAGEHOW TO SPEED Click “Add Type of Cut”. S AND FEED S IN Enter the name “Side Milling” and click OK. E S P R IT Add a tool material Tool material corresponds to the material of the tool, such as HSS, Carbide, etc... It could also be used to define the name of the tool vendor , for example “KENNAMETAL – TiCN Series”. The Tool Material is valid only in the selected Standard. Click “Add Tool Material”. Enter the name “TiAN Coated” and click OK. dptechnology.com 5 HOW TO MANAGEHOW TO SPEED Choosing a tool material in the Cutting Tools Manager After a tool material is defined in the Speed Feeds Manager, you can specify the material of the tool. However, since the Cutting Tools Manager “does not know” what cutting standard will be selected in an ESPRIT document, the Cutting Tools Manager will show a list of all existing tool materials across all standards. If you define your tool material with a name that already exists in the database, it will not be easy to select the right material for the tool. Choosing a tool material in ESPRIT When a cutting standard is specified in an ESPRIT document, all the tool materials from the current standard will S be listed in the Tool dialog. AND FEED S IN E S P R IT Since the document allows you to choose only one Standard, it is very important to load tools from the Cutting Tools Manager that use the same material as the current standard. If not, ESPRIT will automatically pick the first available Tool Material in the current standard and you may end up with invalid Speed Feeds. dptechnology.com 6 HOW TO MANAGEHOW TO SPEED Create data for speeds and feeds After defining the material condition, type of cut and tool material, you need to define some Speed Feeds data. Data needs to be defined for each combination of Material/Type of Cut/Tool Material because each combination may give you a different value. You can enter as many “Speed Feed” references as you want for any unit. The created data will be displayed in a grid visible based on the selected combination of Material/Type of Cut/Tool Material. Values are not converted automatically to inch when created in metric and vice versa. You will need at least one reference to get a Speed Feed value and at least two to get an interpolated Speed S Feed value when the Tool Diameter/Cut Depth does not exist in the database. AND FEED Make sure “Input Unit” is set to Metric and “Calculation Style” is set to Milling. S IN E S P R IT Right-click inside the grid and click “Add New”. Enter the following values. Notice that metric units are denoted with (M). • Tool Dia. (M) = 10 • Cut Depth (M) = 15 • Speed = 55 • Feed = 0.043 dptechnology.com 7 HOW TO MANAGEHOW TO SPEED The Speed is the distance in feet or meters that the edge of the rotating tool travels per minute. The Feed is the speed in inches or millimeters (per tooth) that the cutter moves in the XY plane. ESPRIT automatically calculates the Z feed rate as a user-defined percentage of the XY feed rate. Click OK to add the data to the grid. S Click “Add New” and add the following data: AND FEED • Tool Dia. (M) = 8 • Cut Depth (M) = 12 • Speed = 55 S • Feed = 0.030 IN E S P R IT Click “Add New” and add the following data: • Tool Dia. (M) = 12 • Cut Depth (M) = 18 • Speed = 55 • Feed = 0.054 Right-click in the grid and click “Calculator”. dptechnology.com 8 HOW TO MANAGEHOW TO SPEED Enter the following values: • Cutter Diameter = 16 • Z Cut Depth = 24 S AND FEED S IN E S P R IT For “Speed (Meters per Minute)” enter 55 and press the Tab key. “Revolutions per Minute” is calculated automatically. dptechnology.com 9 HOW TO MANAGEHOW TO SPEED For “Feed/Flute (MM per Flute)” enter .072 and press the Tab key. The other feed rates are calculated automatically. S AND FEED Click “Add results to current speed feed data”. S IN E S P R IT You are notified that the database has been updated. Click OK. Click Exit. The grid is updated, but the note is missing. dptechnology.com 10 HOW TO MANAGEHOW TO SPEED To edit the data directly in the grid, right-click and then click “Allow Grid In Line Editing”. Place your cursor in the “Note” field and type “Speed Feed data for HS”.
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