8/10/2019 MESIN PERKAKAS FRAIS.ppt
1/69
MESIN PERKAKAS FRAIS (MILLING)
Oleh : Ade Sumpena, ST., M.Kom
Jurusan Teknik Mesin Politeknik Negeri Jakarta
8/10/2019 MESIN PERKAKAS FRAIS.ppt
2/69
Prinsip Proses pemesinan frais (milling) adalah proses penya-yatan benda kerja menggunakan alat potong, dengan
mata potong jamak yang berputar .
8/10/2019 MESIN PERKAKAS FRAIS.ppt
3/69
Gerakan utama mesin Frais (Milling)
8/10/2019 MESIN PERKAKAS FRAIS.ppt
4/69
Bentuk-bentuk dasar yang dapat di buat padamesin Frais (Milling)
8/10/2019 MESIN PERKAKAS FRAIS.ppt
5/69
Jenis Mesin Frais
1. Mesin Frais Horizontal
Axis of spindle is inhorizontal plane and
parallel to Its table. Generally cutters aremounted on long arbor.
8/10/2019 MESIN PERKAKAS FRAIS.ppt
6/69
2. Mesin Frais Vertikal
Position of spindle isvertical or 90 to the
work table.Its suitable for
boring pocket milling profile milling& keyway cutting.
8/10/2019 MESIN PERKAKAS FRAIS.ppt
7/69
3. Mesin Frais Universal
8/10/2019 MESIN PERKAKAS FRAIS.ppt
8/69
Bagian-bagian utama mesin Frais
Mesin Frais Horizontal Mesin Frais Vertikal
8/10/2019 MESIN PERKAKAS FRAIS.ppt
9/69
Typical milling operation
8/10/2019 MESIN PERKAKAS FRAIS.ppt
10/69
Metode pemakanan pada mesin Frais
8/10/2019 MESIN PERKAKAS FRAIS.ppt
11/69
Klasifikasi proses Frais
8/10/2019 MESIN PERKAKAS FRAIS.ppt
12/69
Types of milling cutters
8/10/2019 MESIN PERKAKAS FRAIS.ppt
13/69
8/10/2019 MESIN PERKAKAS FRAIS.ppt
14/69
8/10/2019 MESIN PERKAKAS FRAIS.ppt
15/69
Pisau jari (End mill cutter)
8/10/2019 MESIN PERKAKAS FRAIS.ppt
16/69
Cutter insert
8/10/2019 MESIN PERKAKAS FRAIS.ppt
17/69
Carbide insert
8/10/2019 MESIN PERKAKAS FRAIS.ppt
18/69
Pemegang alat potong (Tool Holder)
Milling Acessories
8/10/2019 MESIN PERKAKAS FRAIS.ppt
19/69
8/10/2019 MESIN PERKAKAS FRAIS.ppt
20/69
Arbor
8/10/2019 MESIN PERKAKAS FRAIS.ppt
21/69
STUB ARBOR
The arbors are holdwith the machine.
The arbors are of threetypes A,B,C as shownin picture.
8/10/2019 MESIN PERKAKAS FRAIS.ppt
22/69
TYPES OF ARBORS
Types A is used tomount the shell and
mills and similarcutters.The cutter is tightenedon the arbor using thescrew.
8/10/2019 MESIN PERKAKAS FRAIS.ppt
23/69
TYPES OF ARBOR
It is used to mountlarge face millingcutters.
The cutter is held onarbor by fourscrew(b), it has aslot(c),which fits overspindle (d).
8/10/2019 MESIN PERKAKAS FRAIS.ppt
24/69
TYPES OF ARBOR
It is a morse taperadaptor arbor used tohold drills, reamers,chucks etc.
8/10/2019 MESIN PERKAKAS FRAIS.ppt
25/69
Pemegang benda kerja
a. Plain viseJaws parallel or 90 to axis of spindle
8/10/2019 MESIN PERKAKAS FRAIS.ppt
26/69
b. Swivel base vise
Can swivel through 360 in horizontal plane
8/10/2019 MESIN PERKAKAS FRAIS.ppt
27/69
c. Universal vise
Can swivel through 360 in horizontal planeand tilted from 0 to 90 in vertical plane
8/10/2019 MESIN PERKAKAS FRAIS.ppt
28/69
Rotary table
Rotary table yang dapat di atur
sudutnya
Rotary table untuk mesin fraisvertikal
Meja yang dapat diatur sudutnya
8/10/2019 MESIN PERKAKAS FRAIS.ppt
29/69
Rotary table dapat digunakan pada mesin frais horizontal da vertikal
8/10/2019 MESIN PERKAKAS FRAIS.ppt
30/69
8/10/2019 MESIN PERKAKAS FRAIS.ppt
31/69
Milling Set Up
8/10/2019 MESIN PERKAKAS FRAIS.ppt
32/69
Work Holding Method * The vice jaws and the workpiece must be free from burrs, chips, and cutting fluid.* Smaller workpiece should be supported by parallel bars to provide the supporting
datum.* Round bar must be placed between the workpiece and the movable jaw to ensure
that the workpiece is in perfect contact with the fix jaw.* The vice handle should be tightened by hand to avoid over clamping of the
workpiece as well as the vice. Hide face hammer should be used to assure that theworkpiece is in perfect contact with the supporting base.* On completion of the milling of the first face, the workpiece should be unloaded,
deburred, and cleaned before the next operation.* To machine the second and the third faces, the workpiece should be clamped with
its preceding machined surface facing against the fix jaw of the vice.
* Similar clamping method can be applied in the machining of the fourth face.* Yet it can also be clamped on the vice without the round bar.* Both ends of the workpiece can be machined with the periphery flutes of the
cutter using up cut milling as shown in figure
8/10/2019 MESIN PERKAKAS FRAIS.ppt
33/69
8/10/2019 MESIN PERKAKAS FRAIS.ppt
34/69
8/10/2019 MESIN PERKAKAS FRAIS.ppt
35/69
Pemegangan benda kerja tanpa ragum
8/10/2019 MESIN PERKAKAS FRAIS.ppt
36/69
8/10/2019 MESIN PERKAKAS FRAIS.ppt
37/69
Milling Attachment
8/10/2019 MESIN PERKAKAS FRAIS.ppt
38/69
VERTICAL MILLING ATTACHMENT
This attachmentmounted on column ofuniversal Milling
machine.Which consistshousing spindle headand bevel drive gears
8/10/2019 MESIN PERKAKAS FRAIS.ppt
39/69
Its used for cutting atany angle in vertical
plane to produce key
ways , slots andcorners. Its providereciprocating drive forsingle point cuttingtool.
SLOTTING ATTACHMENT
8/10/2019 MESIN PERKAKAS FRAIS.ppt
40/69
RACK MILLING ATTACHMENT
Its mounted between theface of column and outersupport on a plain oruniversal milling machine.
It consists a fixed housingand a spindle.A special rack indexingattachment used to movethe work longitudinallywith accurate spacing ofteeth.
8/10/2019 MESIN PERKAKAS FRAIS.ppt
41/69
UNIVERSAL SPIRAL ATTACHMENT
Its used to mill spiralswith a plain millingmachine.
Its useful for cuttinghelical threads , gears ,worms and racks.
8/10/2019 MESIN PERKAKAS FRAIS.ppt
42/69
Perhitungan proses pengerjaan pada mesin FraisA. Kecepatan Potong/Cutting Speed (V)
Rumus :
Hal hal yang mempengaruhi Cutting speed adalah :1. Material benda kerja,
2. Material alat potong,3. Pendinginan ( cooling ).
8/10/2019 MESIN PERKAKAS FRAIS.ppt
43/69
Tabel Kecepatan Potong
Materials
HSS Carbide
Fine Coarse Fine Coarse
Tool Steel 75 100 25 45 185 230 110 140
Low carbon Steel 70 90 25 40 170 215 90 120
Medium Carbon Steel 60 85 20 40 140 185 75 110
Cast Iron 40 45 25 30 110 140 60 75
Brass 85 110 45 70 185 215 120 150
Alumunium 70 100 30 45 140 215 60 90
8/10/2019 MESIN PERKAKAS FRAIS.ppt
44/69
8/10/2019 MESIN PERKAKAS FRAIS.ppt
45/69
Pemakanan/Asutan (Feeding)
8/10/2019 MESIN PERKAKAS FRAIS.ppt
46/69
8/10/2019 MESIN PERKAKAS FRAIS.ppt
47/69
Dividing Head (Kepala Pembagi)
8/10/2019 MESIN PERKAKAS FRAIS.ppt
48/69
Piring Pembagi Tetap
Bagian-bagian dividing head
Ada dua sistemPembagian :1, Pembagian
Langsung2. Pembagian
Tidak Langsung
8/10/2019 MESIN PERKAKAS FRAIS.ppt
49/69
8/10/2019 MESIN PERKAKAS FRAIS.ppt
50/69
8/10/2019 MESIN PERKAKAS FRAIS.ppt
51/69
Its used to obtaingreater number of
divisions that cannot be obtained bydirect indexing.Its carried out using
40:1 ratio of theworm and wormmechanism.
SIMPLE INDEXING MECHANISM
8/10/2019 MESIN PERKAKAS FRAIS.ppt
52/69
8/10/2019 MESIN PERKAKAS FRAIS.ppt
53/69
Piring Pembagi
8/10/2019 MESIN PERKAKAS FRAIS.ppt
54/69
Bentuk-bentuk benda kerja hasil dari dividing headContoh untuk pembagian langsung :
Contoh untuk pembagian tidak langsung :
8/10/2019 MESIN PERKAKAS FRAIS.ppt
55/69
Macam-macam roda gigi yang dapat dibuat padamesin Frais dengan bantuan kepala pembagi
HELICAL GEAR
Elements of teeth are
twisted or helical.Used for connecting shaftat an angle in same or
different planes.Smooth acting gearing .
8/10/2019 MESIN PERKAKAS FRAIS.ppt
56/69
When the shafts are at90 and two bevelgears are of same size,known as mitergears.
MITRE GEARING
8/10/2019 MESIN PERKAKAS FRAIS.ppt
57/69
SPUR GEAR
Teeth element parallel to rotating
shafts are known asspur gear.Used to transmit
power and motionthrough parallelshafts.
8/10/2019 MESIN PERKAKAS FRAIS.ppt
58/69
HERRINGBONE GEAR
Its equivalent totwo helicalgears,one having a
right hand andother a left handhelix.
Its used in heavyduty machines likesteel roll mills.
8/10/2019 MESIN PERKAKAS FRAIS.ppt
59/69
BEVEL GEAR
When two shafts are insame plane but atanother,bevel gears anangle with one are used.Its a frustum of a conehaving all elements of teeth
intersecting at a point.
8/10/2019 MESIN PERKAKAS FRAIS.ppt
60/69
HYPOID GEARS
Modification of a bevel gear where
the shaft are atright angle but theydont intersect asdo the shaft for
bevel gears.
8/10/2019 MESIN PERKAKAS FRAIS.ppt
61/69
8/10/2019 MESIN PERKAKAS FRAIS.ppt
62/69
8/10/2019 MESIN PERKAKAS FRAIS.ppt
63/69
ANNULAR GEAR
A gear with internalteeth is known asannular gear areused inautomobiles.
8/10/2019 MESIN PERKAKAS FRAIS.ppt
64/69
Membuat Roda Gigi Lurus (Spur Gear)
8/10/2019 MESIN PERKAKAS FRAIS.ppt
65/69
8/10/2019 MESIN PERKAKAS FRAIS.ppt
66/69
8/10/2019 MESIN PERKAKAS FRAIS.ppt
67/69
Rumus Roda Gigi Lurus
8/10/2019 MESIN PERKAKAS FRAIS.ppt
68/69
Rumus Roda Gigi Helik (Helical Gear)
8/10/2019 MESIN PERKAKAS FRAIS.ppt
69/69
Thank You