GB1603790A - Creation of Inventions and Patents with Artificial Intelligence

GB1603790A – Machine tool incorporating means for cleaning an abutment surface therein
– Google Patents

GB1603790A – Machine tool incorporating means for cleaning an abutment surface therein
– Google Patents
Machine tool incorporating means for cleaning an abutment surface therein

Download PDF
Info

Publication number
GB1603790A

GB1603790A
GB22143/78A
GB2214378A
GB1603790A
GB 1603790 A
GB1603790 A
GB 1603790A
GB 22143/78 A
GB22143/78 A
GB 22143/78A
GB 2214378 A
GB2214378 A
GB 2214378A
GB 1603790 A
GB1603790 A
GB 1603790A
Authority
GB
United Kingdom
Prior art keywords
machine tool
fluid
nozzle
slide
rod
Prior art date
1978-05-24
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.)

Expired

Application number
GB22143/78A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

WHITE BSA TOOLS Ltd

Original Assignee
WHITE BSA TOOLS Ltd
Priority date (The priority date 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 date listed.)
1978-05-24
Filing date
1978-05-24
Publication date
1981-11-25

1978-05-24
Application filed by WHITE BSA TOOLS Ltd
filed
Critical
WHITE BSA TOOLS Ltd

1978-05-24
Priority to GB22143/78A
priority
Critical
patent/GB1603790A/en

1981-11-25
Publication of GB1603790A
publication
Critical
patent/GB1603790A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

Classifications

B—PERFORMING OPERATIONS; TRANSPORTING

B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR

B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT

B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools

B23Q11/0042—Devices for removing chips

B23Q11/005—Devices for removing chips by blowing

Description

(54) MACHINE TOOL INCORPORATING MEANS FOR
CLEANING AN ABUTMENT SURFACE THEREIN
(71) We, WHITE-BSA TOOLS
LIMITED, a British Company of Mackadown
Lane, Kitts Green, Birmingham B33 OLE, do hereby declare the invention for which we pray that a Patent may be granted to us, and the method by which it is to be performed to be particularly described in and by the following statement:- This invention relates to machine tools and particularly to automatic machine tools such as multi-spindle lathes for example.
In machine tools, and particularly those operated automatically such as by N.C. control, it is quite common for movement of a member such as a slide to be controlled by co-operation between a pair of surfaces; one example of this is the provision of a dead stop which controls an end position of a slide at the end of a path of travel along the machine bed or a further slide. Such an arrangement is vulnerable to the random deposition on the controlling surfaces of foreign material such as swarf and dirt and this can lead to dimensional errors in a workpiece by modifying the aforesaid end position of the slide and thus the length of the travel path governing the dimension. Inaccuracies can occur in a similar manner when a member is controlled by a cam and follower for example.
An object of the present invention is to alleviate or eliminate the aforesaid problem.
According to the present invention, a machine tool comprises a movable member of which at least one position is controlled by co-operation between a pair of surfaces, one of which is on or associated with the member, and means for directing a stream of fluid under pressure on to one or both of said surfaces to remove any foreign material deposited thereon.
In one convenient arrangement, the fluiddirecting means is mounted on the member.
Preferably suitable valve means are provided and operable to provide fluid flow only when required.
The valve means may be controlled, for example, by a cam associated with the movable member. This arrangement is particularly ad
vantageous for use with a tool slide
end stop, since the valve can be arranged to
open and supply fluid for a brief period as the
slide approaches the end stop to ensure that
the stop is free from foreign material, but to
be closed and prevent flow of fluid at other
times. The fluid is preferably air or coolant
from the normal machine coolant supply.
The invention will now be described, by
way of example, with reference to the single
accompanying drawing, which is a part
sectional side elevation of part of a machine
tool of the invention.
Referring to the drawing, this shows a
machine tool slide 1 mounted in conventional
manner for reciprocatory movement along a
machine bed or other slide (not shown) in the
directions indicated by the arrow A. An end
position of the slide at the end of its travel
in one of these directions is defined by an
end stop in the form of a stop ring 2 supported
on a fixed part of the machine tool and having
a peripheral control surface 3.
Mounted on the slide 1 is a bracket 4
supporting a device designated generally at 5
for directing a stream of fluid at the control
surface 3 of the stop ring 2. The bracket 4 has a bored and threaded boss 6 into which is
screwed an end portion 7 of an ex
ternally threaded rod 8 forming part of the device 5. A body 9 having a longitudinal through bore 10 surrounds the rod 8 with a small clearance and a lock nut 11
screwed onto the rod 8 clamps the body 9 to
the boss 6. At the right-hand end of the rod as seen in the drawing is a square formation
8A for application of a suitable tool when it
is desired to adjust the position of the rod in the boss 6 for the purpose to be described.
The left-hand end of the rod 8 terminates in; a nozzle 12 communicating through an axial supply passage 13 and radial passages 14 with an annular chamber 15 communicating in turn with a fluid inlet 16 of the body adapted for connection with a source of fluid under pressure. The fluid may conveniently be air or liquid coolant from the usual coolant supply of the machine tool. The end 17 of the nozzle
12 forms a second control surface for cooperation with the surface 3 of the stop 2 to define one extreme position of the slide in its path of travel during machining.
During the setting up of a machining operation, the position of the control surface 17 is adjusted in relation to the slide 1 by loosening the nut 11 and rotating the rod 8 by means of a tool applied to the end 8A thereof, thereby altering the axial position of the rod. The nut 11 is re-tightened to hold the rod in the new adjusted position.
The nozzle 12 is directed towards the external surface 3 of the end stop 2 which cooperates with the surface 17 of the slide 1. As the slide approaches the end stop and prior to engagement of the surfaces 3 and 17, the nozzle 12 approaching the surface 3 delivers a jet of air or liquid coolant to impinge upon the surface 3 so as to remove any foreign material such as swarf which may have adhered thereto and which, if contacted by the surface 17 would adversely affect the dimensioning of a component being machined. It is also contemplated to direct a stream of fluid onto the surface 17 for the same purpose.
Since, in the arrangement shown, cleaning of the surface 3 is only strictly necessary just prior to engagement of that surface by the surface 17, it may be convenient to provide valve means to ensure that fluid is only supplied through the nozzle 12 just prior to engagement of the surfaces, and being at other times cut-off. Such intermittent supply may conveniently be achieved by a cam associated with the slide operating a valve, when the slide is in the vicinity of its end position.
Alternatively, control may be effected by means of an N.C. programme. In some instances, when fluid is freely available in the machine tool, as for example when the fluid is the machine tool coolant, it may be convenient to provide constant fluid flow from the nozzle 12.
It will be seen that the invention provides a convenient means of guarding against inaccuracies in a workpiece due to accumulation
of foreign material on control surfaces.
WHAT WE CLAIM IS:
1. A machine tool comprising a movable member of which at least one position is controlled by co-operation between a pair of sur
faces, one of which is on or associated with
the member, and means for directing a stream
of fluid under pressure on to one or both of said surfaces to remove any foreign material deposited thereon.
2. A machine tool according to Claim 1, wherein the fluid directing means is mounted on the member.
3. A machine tool according to Claim 2, wherein one of the surfaces is on or associated with the fluid directing means which is arranged to direct fluid at the other surface.
4. A machine tool according to Claim 2 or
Claim 3 wherein the fluid-directing means includes a nozzle, the axially outermost surface of which is said one of the surfaces.
5. A machine tool according to any one of the preceding claims, wherein the fluid directing means is adjustable towards and away from the other of said surfaces.
6. A machine tool according to any one of
Claims 2 to 5, wherein the fluid directing means is mounted for adjustment relative to said member in a direction towards and away from the other of said surfaces.
7. A machine tool according to Claim 4, wherein the nozzle is carried by a hollow rod on support means secured to the member, the rod supporting a body having an inlet adapted for connection to a source of fluid under pressure, the body containing passages communicating with said inlet and via the interior of the rod with the nozzle.
8. A machine tool according to Claim 7, wherein the hollow rod is threadedly engaged with the suupport means whereby rotation of the rod relative to the support means provides adjustment of the nozzle towards and away from the other of said surfaces.
9. A machine tool according to any one of the preceding claims wherein said member is a slide.
10. A machine tool substantially as hereinbefore described with reference to the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (10)

**WARNING** start of CLMS field may overlap end of DESC **.
12 forms a second control surface for cooperation with the surface 3 of the stop 2 to define one extreme position of the slide in its path of travel during machining.
During the setting up of a machining operation, the position of the control surface 17 is adjusted in relation to the slide 1 by loosening the nut 11 and rotating the rod 8 by means of a tool applied to the end 8A thereof, thereby altering the axial position of the rod. The nut 11 is re-tightened to hold the rod in the new adjusted position.
The nozzle 12 is directed towards the external surface 3 of the end stop 2 which cooperates with the surface 17 of the slide 1. As the slide approaches the end stop and prior to engagement of the surfaces 3 and 17, the nozzle 12 approaching the surface 3 delivers a jet of air or liquid coolant to impinge upon the surface 3 so as to remove any foreign material such as swarf which may have adhered thereto and which, if contacted by the surface 17 would adversely affect the dimensioning of a component being machined. It is also contemplated to direct a stream of fluid onto the surface 17 for the same purpose.
Since, in the arrangement shown, cleaning of the surface 3 is only strictly necessary just prior to engagement of that surface by the surface 17, it may be convenient to provide valve means to ensure that fluid is only supplied through the nozzle 12 just prior to engagement of the surfaces, and being at other times cut-off. Such intermittent supply may conveniently be achieved by a cam associated with the slide operating a valve, when the slide is in the vicinity of its end position.
Alternatively, control may be effected by means of an N.C. programme. In some instances, when fluid is freely available in the machine tool, as for example when the fluid is the machine tool coolant, it may be convenient to provide constant fluid flow from the nozzle 12.
It will be seen that the invention provides a convenient means of guarding against inaccuracies in a workpiece due to accumulation
of foreign material on control surfaces.
WHAT WE CLAIM IS:
1. A machine tool comprising a movable member of which at least one position is controlled by co-operation between a pair of sur
faces, one of which is on or associated with
the member, and means for directing a stream
of fluid under pressure on to one or both of said surfaces to remove any foreign material deposited thereon.

2. A machine tool according to Claim 1, wherein the fluid directing means is mounted on the member.

3. A machine tool according to Claim 2, wherein one of the surfaces is on or associated with the fluid directing means which is arranged to direct fluid at the other surface.

4. A machine tool according to Claim 2 or
Claim 3 wherein the fluid-directing means includes a nozzle, the axially outermost surface of which is said one of the surfaces.

5. A machine tool according to any one of the preceding claims, wherein the fluid directing means is adjustable towards and away from the other of said surfaces.

6. A machine tool according to any one of
Claims 2 to 5, wherein the fluid directing means is mounted for adjustment relative to said member in a direction towards and away from the other of said surfaces.

7. A machine tool according to Claim 4, wherein the nozzle is carried by a hollow rod on support means secured to the member, the rod supporting a body having an inlet adapted for connection to a source of fluid under pressure, the body containing passages communicating with said inlet and via the interior of the rod with the nozzle.

8. A machine tool according to Claim 7, wherein the hollow rod is threadedly engaged with the suupport means whereby rotation of the rod relative to the support means provides adjustment of the nozzle towards and away from the other of said surfaces.

9. A machine tool according to any one of the preceding claims wherein said member is a slide.

10. A machine tool substantially as hereinbefore described with reference to the accompanying drawings.

GB22143/78A
1978-05-24
1978-05-24
Machine tool incorporating means for cleaning an abutment surface therein

Expired

GB1603790A
(en)

Priority Applications (1)

Application Number
Priority Date
Filing Date
Title

GB22143/78A

GB1603790A
(en)

1978-05-24
1978-05-24
Machine tool incorporating means for cleaning an abutment surface therein

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

GB22143/78A

GB1603790A
(en)

1978-05-24
1978-05-24
Machine tool incorporating means for cleaning an abutment surface therein

Publications (1)

Publication Number
Publication Date

GB1603790A
true

GB1603790A
(en)

1981-11-25

Family
ID=10174599
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB22143/78A
Expired

GB1603790A
(en)

1978-05-24
1978-05-24
Machine tool incorporating means for cleaning an abutment surface therein

Country Status (1)

Country
Link

GB
(1)

GB1603790A
(en)

1978

1978-05-24
GB
GB22143/78A
patent/GB1603790A/en
not_active
Expired

Contact information