GB2122519A - Positioning of the truing tool of an internal grinding machine - Google Patents
Positioning of the truing tool of an internal grinding machine Download PDFInfo
- Publication number
- GB2122519A GB2122519A GB08308652A GB8308652A GB2122519A GB 2122519 A GB2122519 A GB 2122519A GB 08308652 A GB08308652 A GB 08308652A GB 8308652 A GB8308652 A GB 8308652A GB 2122519 A GB2122519 A GB 2122519A
- Authority
- GB
- United Kingdom
- Prior art keywords
- truing
- slide
- cross slide
- grinding element
- truing tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/18—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the presence of dressing tools
Abstract
The invention relates to a method and device for positioning the truing tool of an internal grinding machine. During an adjusting movement of a cross slide 4 to a different bore diameter to be ground, the truing tool 8 maintains its position unchanged in relation to the grinding element 10, and during a second adjusting movement of the cross slide 4 to compensate for the reduction in grinding element diameter, the truing tool 8 follows the cross slide 4. In the preferred device, the truing tool 8 is disposed on a truing slide 7 movable in relation to the cross slide 4, and can be driven via a screw spindle 1, and can be connected via a clamping rod 13 and clamping devices 14, 15 to the cross slide 4, or to a fixed part of the machine, for example, the guide member 3. As a result the truing tool is constrainedly positioned in relation to the bore diameter via only one adjusting element. <IMAGE>
Description
SPECIFICATION
Positioning of the truing tool of an internal
grinding machine
The invention relates to a method and device
for positioning a truing tool of an internal
grinding machine, having a table carrying a
grinding element and a cross slide for adjust
ment to the bore diameter to be ground, for
the feed movement and for the additional
movement to compensate for the reduction in
the diameter of the grinding element due to
the amount of wear and truing.
Internal grinding machines are known in
which an oscillating table carries the grinding
device, and one or two associated slides per
form adjustment to the required bore dia
meter, the feed movement, and a step-by-step constant movement to compensate for the
reduction in grinding element diameter due to
wear and truing.
With that operating principle the truing tool
is disposed on the feed slide. It must be set
up on the basis of the bore diameter to be
ground. Before the changeover to a different
bore diameter, the grinding element is trued.
Then the feed slide is so adjusted in a setting
up operation, that the generated surface of
the new bore occupies substantially the cor
rect starting position in relation to the grind
ing element. Then the first workpiece is
ground in the automatic cycle, measured and
after-ground - i.e., corrected - manually, until the required bore dimension has been
reached.
Then the truing tool is brought into contact
with the grinding element, which is again
trued. After that a second workpiece is ma
chined in the automatic cycle. After the result
of a fresh measurement, the position of the
truing tool is corrected. These operations must
be performed repeatedly, before the automatic
cycle leads to a continuous, dimensionally
correct grinding of workpieces with the new
bore diameter. It is therefore costly in time
and money to change over to a different bore
diameter to be ground.
Internal grinding machines are also known in which the oscillating grinding table carries
a cross slide with the grinding device, the
grinding feed and truing compensation being
performed via the cross slide, the adjustment
and positioning to a different bore diameter
being performed via a further cross slide,
which carries the workpiece, with the truing
tool performing no transverse adjustment. The
changeover and setting-up are facilitated by a
second cross slide. This operational principle
is also used for CNC internal grinding ma
chines, a second CNC axis being required for
transverse positioning, in addition to the sec
ond cross slide.
It is an aim of the invention to optimize the
positioning of the truing tool, while at the same time minimizing the changeover times, during adjustment to a different bore diameter to be ground.
According to one aspect of the invention there is provided a method of positioning a truing tool of an internal grinding machine, having a table carrying a grinding element and a cross slide for adjustment to the bore diameter to be ground, for the feed movement and for the additional movement to compensate for the reduction in the diameter of the grinding element due to the amount of wear and truing, wherein during a first adjusting movement of the cross slide to a different bore diameter to be ground, the truing tool maintains its position unchanged in relation to the grinding element, while during a second adjusting movement of the cross slide to compensate for the reduction in grinding element diameter the truing tool follows the cross slide.
According to another aspect of the invention, there is provided a device for positioning the truing tool of an internal grinding machine comprising a table carrying the grinding element, a workpiece-carrying cross slide, a truing slide carrying a truing tool, means for moving the workpiece-carrying cross slide with the truing slide while maintaining its position unchanged with respect to the grinding element during a first adjusting movement to a different diameter to be ground and for moving the truing slide and the workpiececarrying cross slide together during a second adjusting movement to compensate for reduction in grinding element diameter.
In one embodiment, the truing tool is disposed on the truing slide which is movable in relation to the cross slide. Both slides can be driven by respective screw spindles disposed in line with each other and couplable and brakable by means of a single-face clutch with a spring pressure brake. The truing slide can be connected to the cross slide or to a fixed part of the machine, for example, the guide member.
In a second embodiment of the invention also, the truing tool is disposed on the truing slide which is movable in relation to the cross slide. Both slides can be driven via respective parallel screw spindles connected by means of gear wheels and couplable and brakable by means of a single-face clutch with a spring pressure brake. The truing slide can be connected to the cross slide or to a fixed part of the machine, for example, the guide member.
In a further embodiment of the invention also, the truing tool is disposed on the truing slide which is movable in relation to the cross slide. Both slides can be driven by a screw spindle, and can be connected together by a clamping bar and clamping devices. Alternatively the truing slide can be connected to a fixed part of the machine, for example, the guide member.
The advantage of the invention resides in the fact that the setting-up adjustment, feed movement and truing compensation can be performed on conventional and also NC and
CNC controlled internal grinding machines while using only one cross slide carrying the workpiece. Whilst during the setting-up adjustment for a new bore diameter the truing tool is left unaltered in relation to the reference line of the grinding element, and during the feed movement and truing adjustment the truing tool follows the movement of the cross slide - i.e., the truing tool remains unaltered in relation to a reference line of the workpiece bore. As a result, the truing tool is positioned constrainedly and with high accuracy in relation to the bore diameter via only one adjusting element.Consequently the costs and time of the change-over are reduced, and one NC axis is saved in the case of NC or CNC controlled machines.
To help understanding of the invention, three embodiments thereof will now be described in greater detail, with reference to the accompanying drawings in which:~
Figure 1 shows in diagrammatic cross-section a device according to the invention for positioning the truing tool, with roller screw drives disposed in line with each other,
Figure 2 shows a similar device, with roller screw drives disposed in parallel, and
Figure 3 shows another similar device, with a roller screw drive and clamping devices.
In a first embodiment of the device, shown in Fig. 1, a cross slide 4 with a workpiece carrier 5 is disposed in a guide (not shown in detail) on a guide member. A workpiece 6 is received by a clamping device of the workpiece carrier 5. Disposed in a separate guide on the cross slide 4 is a truing slide 7 with a truing tool 8. The cross slide 4 and truing slide 7 are driven via roller screw drives disposed one after the other, whose screw spindles 1, 2 have the same hand and pitch.
The screw spindles 1, 2 are interconnected via a single-face clutch with a spring pressure brake 9.
In a second embodiment of the device, shown in Fig. 2, a cross slide 4 with a workpiece carrier 5 is also disposed in a guide (not shown) on a guide member. A workpiece 6 is received by a clamping device of the workpiece carrier 5. A truing slide 7 with a truing tool 8 is disposed in a separate guide on the cross slide 4. In contrast with the embodiment illustrated in Fig. 1 the cross slide 4 and truing slide 7 are driven via two roller screw drives connected in parallel, whose screw spindles 1, 2, also have the same hand and pitch. The screw spindles 1, 2 are connected by gear wheels 11, 12 via a single-face clutch with a spring pressure brake 9.
In a third and preferred embodiment shown in Fig. 3, a cross slide 4 moved by the drive
of a screw spindle 1 is disposed in a guide
(not shown) on a guide member. A cross slide
4 bears a workpiece carrier 5 in whose clamp
ing device a workpiece 6 is clamped. A truing
slide 7 with a truing tool 8 is disposed in a
separate guide on the cross slide 4. Attached
to the truing slide 7 is a clamping bar 13
which is clamped alternately by clamping de
vices, 14, 15 to the cross slide 4 or its guide
member 3. The operation of these devices
according to the invention illustrated in Figs.
1-3 will now be described.
When the grinding machine illustrated in
Fig. 1 has to be changed over to a different
bore diameter to be ground, the single-face
clutch with spring pressure brake 9 is uncou
pled, the screw spindle 2 is braked, and the
screw spindle 1 is driven. The truing tool 8
maintains its position, for instance, in relation
to the base of the grinding element 10, while
the workpiece carrier 5 with the cross slide 4
is moved by the screw spindle 1, until the
generated surface of the new workpiece 6 has
reached the correct position in relation to the
grinding element 10 and therefore also to the
truing tool. For normal grinding, feeding and
truing compensation the screw spindles 1, 2
are coupled to one another.As a result, when
the screw spindles 1, 2 are driven, the cross
slide 4 and truing slide 7 are moved together,
so that the truing tool 8 retains its relationship
to the generated surface of the workpiece 6.
Referring now to Fig. 2, this grinding ma
chine is adapted to a different bore diameter
in a similar manner to that described in rela
tion to Fig. 1, the single-face clutch with
spring pressure brake 9 coupling the gear
wheel 12 to the screw spindle 2, and there
fore moving the truing carriage 7 with a
transmission ratio of 1:1 against the adjust
ment of the workpiece carrier 5. As a result
the truing tool 8 maintains its position in
relation to the grinding element 10. For nor
mal grinding, feeding and truing compensa
tion, the screw spindle 2 is braked, so that
the truing slide 7 is connected to the cross
slide 4, and the truing tool 8 maintains its
relationship to the generated surface of the
workpiece 6.
Referring now to Fig. 3, with this grinding
machine, for adjustment to a different bore
diameter the clamping device 14 is released
and the clamping device 15 is tightened. Due
to this clamping connection to the fixed guide member 3, the truing tool 8 maintains its
position, for example, in relation to the base
of the grinding element 10, while the work
piece carrier 5 with the cross slide 4 is moved
via the screw spindle 1, until the generated
surface of the new workpiece 6 has reached
the correct position in relation to the grinding
element 10 and therefore also to the truing
tool. For the following normal grinding, feed
ing and truing compensation, the clamping
device 15 is released, so that the truing slide 7 is connected to the cross slide 4, and the truing tool 8 maintains its relationship to the generated surface of the workpiece 6.
It will be appreciated that the above described devices permit an automatic truing and feed cycle which is not interrupted by a time-wasting manual adjusting work when changing over to a different bore diameter to the ground. The devices allow the saving of one NC axis in the case of CNC or NC controlled machines.
Claims (7)
1. A method of positioning a truing tool of an internal grinding machine, having a table carrying a grinding element and a cross slide for adjustment to the bore diameter to be ground, for the feed movement and for the additional movement to compensate for the reduction in the diameter of the grinding element due to the amount of wear and truing, wherein during a first adjusting movement of the cross slide to a different bore diameter to be ground, the truing tool maintains its position unchanged in relation to the grinding element, while during a second adjusting movement of the cross slide to compensate for the reduction in grinding element diameter the truing tool follows the cross slide.
4. A device for positioning the truing tool of an internal grinding element machine comprising a table carrying the grinding element, a workpiece-carrying cross slide, a truing slide carrying a truing tool, means for moving the workpiece-carrying cross slide with the truing slide while maintaining its position unchanged with respect to the grinding element during a first adjusting movement to a different diameter to be ground and for moving the truing slide and the workpiece-carrying cross slide together during a second adjusting movement to compensate for reduction in grinding element diameter.
3. A device as claimed in claim 2, including two screw spindles disposed in line with each other and couplable and brakable by means of a single-face clutch with a spring pressure brake, the truing slide being drivingly connected to one screw spindle and the cross slide being drivingly connected to the other screw spindle, the truing slide and the cross slide being driven together when the clutch is engaged and the cross slide alone being driven when the clutch is disconnected with the truing slide being connected, via the
brake, to a fixed part of the machine, for example a guide member.
4. A device as claimed in claim 2, including two parallel screw spindles connected by
means of gear wheels and couplable and
brakable by means of a single-face clutch with a spring pressure brake, the truing slide being drivingly connected to one screw spindle and the cross slide being drivingly connected to the other screw spindle, with the one screw
spindle being carried by the cross slide, the
truing slide and the cross slide being driven
together by the other slide when the clutch is
disengaged and the cross slide alone moving
when the clutch is engaged, with the truing
slide remaining stationary with respect to, for
example, a guide member.
5. A device as claimed in claim 2, includ
ing one screw spindle connected to the cross
slide, a clamping bar and clamping devices
for clamping the clamping bar to the cross
slide or to a fixed part of the machine, for
example a guide member, the truing slide and
the cross slide being driven together by the
screw spindle when the truing slide is
clamped to the cross slide and the cross slide
alone being driven when the truing slide is
clamped to the fixed part.
6. A method of positioning a truing tool
substantially as hereinbefore described with
reference to Fig. 1 or Fig. 2 or Fig. 3 of the
accompanying drawings.
7. A device for positioning a truing tool substantially as hereinbefore described with
reference to Fig. 1, or Fig. 2 or Fig. 3 of the
accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD82239235A DD205370B1 (en) | 1982-04-23 | 1982-04-23 | DEVICE FOR POSITIONING THE ABRASHER OF AN INTERNAL GRINDING MACHINE |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8308652D0 GB8308652D0 (en) | 1983-05-05 |
| GB2122519A true GB2122519A (en) | 1984-01-18 |
| GB2122519B GB2122519B (en) | 1986-08-20 |
Family
ID=5538098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08308652A Expired GB2122519B (en) | 1982-04-23 | 1983-03-29 | Positioning of the truing tool of an internal grinding machine |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS58196969A (en) |
| CH (1) | CH658821A5 (en) |
| DD (1) | DD205370B1 (en) |
| DE (1) | DE3308897A1 (en) |
| FR (1) | FR2525514B1 (en) |
| GB (1) | GB2122519B (en) |
| IT (1) | IT1167121B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104029089A (en) * | 2014-06-12 | 2014-09-10 | 北京林业大学 | Large-diameter corn milling cutter grinding device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108081134B (en) * | 2017-11-16 | 2020-03-31 | 上海交通大学 | Grinding wheel profile in-situ detection system and method and grinding wheel profile error compensation method |
| CN110774106A (en) * | 2019-11-08 | 2020-02-11 | 徐州云杉创意设计有限公司 | Device for machining and polishing industrial design parts |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1686275A (en) * | 1927-02-19 | 1928-10-02 | Heald Machine Co | Grinding machine |
| DE485404C (en) * | 1928-02-28 | 1929-10-31 | Wotan Werke Akt Ges | Device for controlling the support and storage device on grinding machines |
| GB967659A (en) * | 1962-09-26 | 1964-08-26 | Herbert Lindner G M B H & Co | Improvements in or relating to grinding machines |
| DE2139807A1 (en) * | 1971-08-09 | 1973-02-22 | Mo Sawod Koordinatnorastotschn | MACHINE FOR GRINDING THE INNER SURFACE OF WORKPIECES |
-
1982
- 1982-04-23 DD DD82239235A patent/DD205370B1/en not_active IP Right Cessation
-
1983
- 1983-03-10 CH CH1320/83A patent/CH658821A5/en not_active IP Right Cessation
- 1983-03-12 DE DE19833308897 patent/DE3308897A1/en not_active Withdrawn
- 1983-03-29 GB GB08308652A patent/GB2122519B/en not_active Expired
- 1983-04-18 JP JP58068251A patent/JPS58196969A/en active Pending
- 1983-04-21 IT IT48140/83A patent/IT1167121B/en active
- 1983-04-22 FR FR8306659A patent/FR2525514B1/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104029089A (en) * | 2014-06-12 | 2014-09-10 | 北京林业大学 | Large-diameter corn milling cutter grinding device |
| CN104029089B (en) * | 2014-06-12 | 2016-05-25 | 北京林业大学 | A kind of Sharpening device that is applicable to major diameter maize milling cutter |
Also Published As
| Publication number | Publication date |
|---|---|
| DD205370A1 (en) | 1983-12-28 |
| GB2122519B (en) | 1986-08-20 |
| DE3308897A1 (en) | 1983-10-27 |
| IT8348140A0 (en) | 1983-04-21 |
| IT1167121B (en) | 1987-05-13 |
| FR2525514B1 (en) | 1986-08-14 |
| JPS58196969A (en) | 1983-11-16 |
| DD205370B1 (en) | 1986-10-22 |
| GB8308652D0 (en) | 1983-05-05 |
| FR2525514A1 (en) | 1983-10-28 |
| CH658821A5 (en) | 1986-12-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |