for MECHANICAL TECHNOLOGY

1. ADVANCE GRINDING
OPERATION
GROUP 2: PRESENTATION

2. CYLINDRICAL
GRINDER

3. The cylindrical grinder is a type of grinding
machine used to shape the outside of an object.
The cylindrical grinder can work on a variety of
shapes, however the object must have a central
axis of rotation. This includes but is not limited to
such shapes as a cylinder, an ellipse, a cam, or a
crankshaft.

4. Cylindrical grinding is defined as having four essential actions:
1.The work (object) must be constantly rotating.
2.The grinding wheel must be constantly rotating.
3.The grinding wheel is fed towards and away from the work.
4.Either the work or the grinding wheel is transversed with respect to the
other.
*While the majority of cylindrical grinders employ all four movements, there
are grinders that only employ three of the four actions.

5. CYLINDRICAL GRINDER

6. MACHINE PREPARATION
FOR GRINDING

7. Grinding is a machining process that uses an abrasive wheel as the cutting
tool. To prepare a machine for grinding, there are several steps you should
follow:
1. Cleaning: Before starting the grinding process, the machine must be
cleaned thoroughly.
2. Inspection: Inspect the machine to ensure that all parts are in good
condition.
3. Setting Up the Machine: This involves adjusting the speed of the grinding
wheel, setting the feed rate and depth of cut, and positioning the workpiece.
4. Dressing the Wheel: This is the process of removing the worn outer layer of
the grinding wheel to expose fresh sharp abrasive grains.
5. Securing the Workpiece: The workpiece must be securely fastened to the
machine.
6. Test Run: Before starting the actual grinding process.

8. • Remember, safety is paramount when operating a grinding machine.
Always use PPE.
• The work of Grinding mill machine is very important to the production of
users.
• Therefore, the user should reasonably use the processing of the
grinding equipment, for the problems in the work to be a reasonable
solution.
• The work of Grinding mill machine is very important to the production of
users.
• therefore, the user should reasonably use the processing of the grinding
equipment, for the problems in the work to be a reasonable solution.
• For the grinding equipment, before the formal start of work, to do its
preparatory work, so that it can be better used.

9. Grinding Mill Machine
Preparation before starting up of the grinding mill machine.
1. The following items must be checked before starting the stone grinder machine. The supply
voltage must meet the requirements of the stone grinder machine. Voltage should drops below
360 volts.
2. Check whether the connecting bolts to make sure they are tightened, especially the
connecting bolts and fastening screws in the main mill should be tightened by force.
3. Check the tightness of each transmission belt. Turn the main motor pulley by hands,
the main motor should rotate flexibly.
4. Check the blower inlet pipe to adjust whether the valve handle is in the
"off" position. If it is off, it is OK.
5.Check the tension of the elevator chain to make sure it is appropriate.

10. 6. lubricate each oil point according to the oil lubrication table and check whether
there is any oil leakage.
7. Adjust the size of the discharge port of the jaw crusher according to the nature
of the material.
8. Check the rotation of each motor of the grinding mill machine to make sure all of
them are correct.
(a) The rotation direction of the main motor shall ensure that the central axis of the
main motor rotates clockwise from top to bottom.
(b)Check the rotary direction of the classifier motor.
(c) Check the Direction of the blower.
9. Check the electrical control cabinet.

12. CENTER-TYPE
CYLINDRICAL GRINDER

13. Cylindrical grinding (also called center-type grinding) is
used to grind the cylindrical surfaces and shoulders of
the workpiece. The workpiece is mounted on centers
and rotated by a device known as a drive dog or center
driver.

14. the part is secured between two pointed
cone shaped center, as in a lathe. The part
may also be secured into the grinding
machine using chuck, or a faceplate. The
grinding wheel rotates about an axis parallel
to the part and is feed perpendicular into the
part surface requiring grinding.

15. PARTS OF CENTER-TYPE CYLINDRICAL
GRINDER
• BASE
-It gives support to all the machine parts.
• TABLE
-Consist of two part (upper table & lower table) UPPER TABLE
mounted on lower table it has head stock, tailstock and centres
workpiece. LOWER TABLE slides on guideways on the bed and
provide longitudinal movement to workpiece.
• HEAD STOCK
-It support the workpiece by means of a dead centre.
• TAILSTOCK
-It is used to support the right hand end of The workpiece
depending on different lengths of workpiece.
• WHEEL HEAD
-The wheel head may be moved perpendicularly (cross) to the
table ways by hand or power, to feed the wheel to the work.

16. INTERNAL
GRINDERS

17. What Is An Internal Grinder? What Are Its Applications?
The concept of internal grinding refers to the grinding of bores and holes. This
grinding process may be one of the most difficult grinding processes in the
industry. Internal grinders are internal grinding tools or machine tools used for
cylindrical profiles. It uses grinding wheels as cutting tools and is a common type
of machining.

18. Internal grinder is a special type of grinding machine, designed for
grinding the internal diameter of the work piece. Although in most
grinding details, internal grinding is almost the same as cylindrical
grinding for grinding the internal diameter, there are some key
differences between the two. Most importantly, the requirements of
internal grinding are very wide.

19. Internal grinder may include multiple grinding wheels for different
purposes. By rotating the work piece and passing it through one or more
grinding wheels, the inner wall of the cylindrical profile is formed. The
internal grinder can be used to make precision pipes, tubes, bearing races
bushings, and many other parts.

20. CENTERLESS
GRINDERS

21. Centerless grinding machines is a powerful engine
valve grinding machine. It can grind round parts. We
use it to grind stem of engine valve and groove of
engine valve. it is fully automatic and at high speed.
help you save cost and improve efficiency.

22. Centerless Grinding Machines Advantages
1. Stronger grinding capacity, wheel speed: 60m/s Improve the cycle time and enhance the
smoothness of face .
2. Intelligency: Grinding wheel realizes constant speed operation, automatic compensation after
dressing, automatic production.
MAIN FEATURES
• Grinding wheel -Grinding wheel spindle support is used five-piece liquid dynamic pressure bearings,
rotary precision is good. Adapt AC inverter control motor to achieve automatic sub-variable speed,
so as to achieve constant line speed. Max working speed: 45m/s.
• Guide wheel -Guide wheel spindle support with an inner taper of 1:10 as a whole type of sliding
bearings; rear support with pairs of double angular contact ball bearings for radial and axial
positioning.

23. • Dressing equipment
-The grinding wheel and adjusting device are servo-driven, step-less
speed change, smooth dressing, and the dressing seat adopts
special alloy cast iron, and is composed of heat treatment, precision
guideway, and ball screw to ensure that the dressing is flat and
straight.
• Oil pressure switch
-Used for lubrication of bed feed system.
• Micro
-fine adjust handwheel
• Feed per scale
-0.001mm

24. CENTERLESS GRINDER

25. THANK YOU
GROUP 2
RHEA ERVAS
MARY ROSE FRADES
MA. MURIEL HUENDA
DIANA MAE MALLETE
LIEANNE EBUENGA
BENIE DISCIPULO