TVET COLLEGE SUPPORT

MILLING MACHINE

 

Setting up Milling machine  
Setting-up of milling machines means the preparation of the milling machines for milling. The selection of the clamping tools for the cutters, of the clamping tools for the workpieces and setting of the cutting values, speed rate, feed rate and depth of cut, are necessary prior to milling.

Proper setting-up and operation of the milling machine are prerequisites for carrying out the milling operation successfully. Errors, such as the selection of an unfavourable way of clamping or sequence of the individual steps, will result in defects in quality of the workpieces machines. The amount of work will be considerably increased.

Setting-up and operation of horizontal or vertical milling machines involves the following steps:
  1. Planning the work cycle.
  2. Making available the cutting tools, measuring and testing tools as well as clamping tools.
  3. Checking the cutting tools, measuring and testing tools and clamping tools for serviceability.
  4. Checking the milling machine for proper working order:
    - existence and state of controls (switches, push-buttons, crank handles),
    - oil level (bubble glasses and sight glasses) as well as identified lubrication points,
    - existence of safety facilities on the milling machine (covers, hoods, cutter guards).
  5. Making available sufficient and adequate coolant.
  6. Checking for existence and serviceability of end stops on the milling table, knee and saddle. Any defects found with the milling machine are to be reported immediately to the serviceman in charge to arrange for immediate repair. If any additional or special attachments are to be used, such as vertical milling heads, universal milling heads, slotting attachments or power driven rotary indexing tables, they are also to be checked for serviceability and safety in operation prior to putting them into operation.
    Defective additional attachments are to be replaced. The defective attachment is to be reported for repair.
  7. The cutting values (cutter speed and feed rates, number of cuts and the relevant depth of cut) are either to be read from the attached documents or to be calculated. They can also be read from the nomogram of the milling machine.
 
Typical setup procedures:
  1. Setting vice square
  2. Fitting and removing cutters
  3. Position cutter and set cutting depth and width
  4. Clamping of work