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MAXNOVO MACHINE Tips : The Universal Cylindrical Grinding Machine is often considered a high precision machinery in a well-equipped factory or workshop, and its importance stems from its unique combination of Precision, Versatility, Cost-Effectiveness and capability. Such grinding machine provides a factory or workshop with the fundamental ability to machining External Grinding (OD), Internal Grinding (ID), Taper Grinding, Face Grinding and etc.
Table Of Content
1. What Is A Universal Cylindrical Grinding Machine
2. How to Hoist the Grinder Machine
3. How to Lubricate the Universal Cylindrical Grinding Machine
4. How to Operate Universal Cylindrical Grinding Machine
5. The Description for Symbolized Plate installed in the Grinder
About the main structure for universal cylindrical Grinder, In order to hel you to understand cylindrical grinder its versatility,
our professional machinery experts from MAXNOVO MACHINE is willing to share further information with you together.
Now, Let's look at this Grinding Machine's main parts.
Machine Bed
The heavy, rigid Machine Bed & Base that supports all other components and absorbs vibrations. It could ensure stability and accuracy through precision-ground guideways.
Working Table
Sits on the base. Its key feature is that it can be swiveled to an angle.
Normally, it has double-swiveling table with a lower section that is fixed and a top section that can pivot. This allows for the grinding of both parallel and conical shapes.
Headstock
The component that holds and rotates the workpiece. In a universal grinding machine, the headstock can also be swiveled, allowing for the grinding of tapers. Normally, It contains a spindle driven by a variable-speed motor and can be moved along the table and swiveled for different setups.
Tailstock
Supports the other end of the workpiece for stability during grinding. In a word, the Tailstock at the opposite end of the table from the headstock that supports the other end of the workpiece. It is used for support, not drilling.
Wheel-head
Holds and drives the grinding wheel. In a universal machine, the wheel-head can also be swiveled and moved towards or away from the work-piece.
The work-head is secured fixed onto the working table by two “L”bolts. The work-head housing can be swiveled around the locating post on the base into desired angular position in counter-clockwise direction within 90°degree to meet machining requirement.
Grinding Wheel
The cutting tool, made of abrasive grains bonded together.
Cross-feeds and In-feeds
Precision handwheels or automated controls that move the wheel-head or table in small, precise increments to control the depth of cut.
Description | |
1. | Deflating knob for work-table hydraulic cylinder |
2. | Locking knob for work head spindle |
3. | Footplate for making tailstock sleeve out or in |
4. | Stop for changing work-table direction (Left) |
5. | Hand wheel for work-table moving in longitudinal direction |
6. | Adjusting knob for changing direction for work-table or stopping (Left) |
7. | Starting and stopping handle for hydraulic drive of work-table |
8. | Lever for changing work-table direction |
9. | Knob for adjusting work-table speed |
10. | Adjusting knob for changing direction of work-table or stopping (Right) |
11. | Knob for pointing rotation of work-table |
12. | Selector knob for in intermittent feed |
13. | Handle for moving grinding wheel bracket forward or backward |
14. | Selecting lever for coarse or fine feed |
15. | Stop for changing work-table direction |
16. | Knob for making coolant on or off |
17. | Cross feed handle for grinding wheel bracket |
18. | Knob for grinding wheel wear compensation |
19. | Localizer for grinding wheel bracket feed in cross direction |
20. | Positioning handle for internal grinding attachment |
21. | Adjusting knob for automatic intermittent federate |
22. | Emergency knob |
23. | Screw for adjusting work-table angle |
24. | Stopping knob for grinding wheel motor |
25. | Starting knob for grinding wheel motor |
26. | Selector knob for control work-head motor |
27. | Adjusting handle for pressure of tightening work piece |
28. | Handle for moving tailstock sleeve |
29. | Inputting knob for main frequency of transducer |
30. | Controlling knob for coolant pump motor |
31. | Starting knob oil pump motor |
32. | Stopping knob for oil pump motor |
33. | Controlling knob for working Lamp |
Normally, The Packing for Grinder Machine is Export Type Wooden Case. Please pay full attention, the Wooden Case can't be reversed or inclined, it also can't strongly stroke when lifting this machine. Please refer to the Hoisting Diagram for Universal Cylindrical Grinding Machine as bellowing.
REMARK :
(a). Before lubricating you must clean all function positions.
(b). Hydraulic oil of table is rejected according to GB2515-81 started and the oil for spindle is according to SY1229-82 started.
(c). The lubrication oil for wheel head spindle is added to dip after long time precipitating and fine filtrating.
Before starting this grinding machine, the operator should read the "Safety Precautions"and then proceed as follows :
(1). See all the handwheel, levers, handles and knobs are in “Stop” or “Withdrawal” position.
Then switch on the machine by means of main switch.
(2). Start the oil pump by depressing the push button 25, coolant pump select button 26 is in “automatic loop” position.
(3). Select the rotary speed according to the workpiece by knob29. The value of rotary speed can be read from speedometer.
(4). Exhaust the air, if any, in the trouble traverse cylinder by operating the knob I on the left of the table.
Then turn the knob 1 to the close position again.
(5). Move the wheel-head forward and backward by operating the handle 14. See that the drive plate of the work-head be rotated and the coolant supply switched on when the wheel-head is brought forward and versa. (coolant flow is regulated by handle 17). It is important that the wheel-head must be brought back for enough before turning the handle 14 least interference should occur with other machine parts.
(6). Mount the work on to the machine after clamping the tailstock in a suitable positing. Operate the handle 9 at “start”position. Set the table trip dogs 5 and 16 at their proper positions. Then gradually turn the knob 11 to regulate the table drive to the desired speed.
(7). Start the wheel by depressing the wheel-head motor “start”push button 27 (Note: The operator should not stand right in front of the wheel to prevent the possibility of any accident when the wheel starts). Bring rapid the wheel-head forward by operation of handle 14. Prior to this, it is important to bring the wheel-head backward by turning the handwheel 18 and to see that the wheel-head and the work be maintained in a distance more than 50mm so that the wheel may not plunge into the work when the wheel-head is being rapidly brought forward.
(8). Feed the wheel to the work by turning the handwheel 18 to make a trial grinding and then measure the work at both ends to correct the position of the upper table or the work-head, if necessary.
(9). After the first piece in a batch is finished to the requirement, retract rapidly the wheel-head by turning bandle 14 and successive grinding can be facilitated by use of the zero line block the positioning dog. For this purpose, pull out and turn the knob 19 with the handwheel 18 stationary until the zero-line block on the dial meets the positioning dog 21. After pushing in the knob 19, rotate the handwheel with dial in counter-clockwise direction by an amount of the grinding allowance of the workpiece.
The next work can now be ground to the desired size by rotating the hand wheel in the clockwise direction unit the zero-line block touches the positioning dog. The remaining work can be finished by the same method.
(10). When the workpiece is oversized as a result of wheel wear compensation can Machine be made by pulling out and turning the knob 19 to back up the dial (With the handwheel 18 stationary) by an amount of the grinding wheel. Then turn the handwheel 18 a clockwise direction until the zero-line block comes against the positioning dog 21.
(11). To dress the grinding wheel, mount the wheel dresser onto the table, or insert the diamond holder onto the tailstock. See that the wheel-head be brought forward by the rapid approach and withdrawal lever. The wheel can now be dressed by the diamond as it is being fed through the cross-feed mechanism. During wheel dressing, table reversing is affected by operating manually the reversing lever 10 or by setting the table trip dogs in the required positions. In either case the diamond should overrun the grinding wheel 3--5 mm at both sides.
(12). When center grinding is changed into chuck grinding, please refer to the Work-head for RSM1500C Grinding Machine.
(13). When internal grinding is to be carried out, the internal grinding attachment bracket must be swung down and clamped onto the wheel-head by means of screw.
(14). The center holes of the workpiece should be greased before mounting the work between the work-head and the tailstock.
(15). The following technical data are given for your reference.
(15.1). Wheel peripheral speed should be 25-35m/sec. V=D.r/60x1000(D: wheel diameter r: wheel spindle speed)
(15.2). Work peripheral speed should be 1/60-1/100as high as wheel peripheral speed (approx. 21-35m/min) V=D.r/1000 (D: work diameter, r: work speed)
(15.3). Table speed should be 0.10-0.3 m/min. In wheel dressing 0.3-2m/min in grinding and 2-4 in setting.
(15.4). Fine feed and dressing should be 0.0025-0.01mm. To improve accuracy and surface finish of the work it is necessary to spark out the work for 2-5 double passes after it has been ground to the required size.
(15.5). If the grinding wheel wear too rapidly, handwheel should be used, if the grinding wheel is easy to get dogged and therefore cause burning marks on the work, soft wheel should be employed.
(15.6). In accordance with the result of the grinding test the wheel peripheral speed should be kept in specific proportion to the work peripheral speed, therefore it is necessary to select the following diameter proportions.
(15.7). Maximum Workpiece diameter less than 300 mm for maximum. Wheel diameter of 400 mm.
(15.8). The wheel diameter than 300 mm for Minimum workpiece diameter of 8 mm.
There are some special symbolized plates are installed in the grinding machine, let us to see their description and indication.
In MAXNOVO MACHINE , Our high precision Universal Cylindrical Grinding Machines are designed for long and heavier workpieces.
They are suitable for processing individual parts as well as for small series production and offer additional flexibility with the internal grinding device.
Moreover, our quality Conventional Grinder Machine with a large machine bed, ground guides, and powerful drives for the work spindle,
grinding spindle and hydraulic unit, make these machines a cost-effective solution for the precision grinding of larger workpieces.
