GB2065003A - Double-ended multiple-spindle fine boring machine - Google Patents
Double-ended multiple-spindle fine boring machine Download PDFInfo
- Publication number
- GB2065003A GB2065003A GB7942701A GB7942701A GB2065003A GB 2065003 A GB2065003 A GB 2065003A GB 7942701 A GB7942701 A GB 7942701A GB 7942701 A GB7942701 A GB 7942701A GB 2065003 A GB2065003 A GB 2065003A
- Authority
- GB
- United Kingdom
- Prior art keywords
- platen
- centre
- working face
- guides
- centre platen
- 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
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B39/00—General-purpose boring or drilling machines or devices; Sets of boring and/or drilling machines
- B23B39/16—Drilling machines with a plurality of working-spindles; Drilling automatons
- B23B39/161—Drilling machines with a plurality of working-spindles; Drilling automatons with parallel work spindles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
Abstract
The machine bed 1 carries outer platens 4, 5 and a centre platen 6 mounted for relative movement on bearing faces 15 of guides 3 to effect the feed. The working face 7 of the centre platen 6, whereon a device for clamping the workpieces is mounted, is arranged in a vertical plane. The outer platens extend vertically and carry spindle heads 10 mounted thereon with axes parallel to the working face. Bearing faces of upper guides are disposed above the centre of gravity C of either the workpiece platen 6 or the outer platens 4, 5 whichever moves horizontally. The workpiece platen 6 has two vertically spaced guides, or has an upper tubular guide 2 and a lower guide. The workpiece platen may be T-shaped with opposite working faces. This may be pivoted about an upper horizontal axis during return movement after machining to prevent the tools scratching the machined workpiece bores. <IMAGE>
Description
SPECIFICATION
Double-ended multiple-spindle fine boring machine
The present invention relates to special-purpose boring machines and, in particular, to double-ended multiple-spindle horizontal-feed fine boring machines.
The invention may be used to the best advantage in large-scale production for fine boring and turning of precision surfaces of workpieces, e.g., of the flange, bushing, and valve fitting type.
The invention resides in that in a double-ended multiple-spindle horizontal-feed fine boring machine on the bed of which outer platens and a centre platen are mounted with a possibility of their relative travel on the bearing faces of the bed guides to effect the feed, the centre platen has a working face, arranged in a vertical plane, whereon a device for clamping the workpieces is mounted, the outer platens extend vertically and carry spindle heads the axes of which are parallel to the working face of the centre platen, the bearing faces of the guides being disposed above the centre of gravity of each one of the platens mounted thereon.
The arrangement of the working face of the centre platen in a vertical plane and the vertical extension of the outer platens ensure for the operator an easy access to the spindle heads and to the workpiece clamping device while operating the machine. Besides, such an arrangement of the working face enables chips and cutting fluid to slip down by gravity from the working face of the centre platen.
All this simplifies the operation and maintenance of the machine and raises its output.
It is advantageous to dispose the guides on the beds on the side opposite to the working face of the centre platen. Such a machine arrangement makes it possible to employ rolled product in the form of a pipe as the supporting structure of the bearing face of the guide, which simplifies and reduces the cost of the manufacture of the machine and also allows the rigidity to be increased without increasing the weight and rolled product to be used instead of an iron casting.
It is possible to dispose the guides above the working face of the centre platen and mount them on the outer platens, while the centre platen may be made T-shaped with the horizontal portion serving as a bearing element contacting the bearing faces of the guides and the vertical portion having the working face and contacting a side guide serving as an additional guide of the centre platen.
It is expedient to provide the T-shaped centre platen with one more working face on the side opposite to said working face. Thus, the arrangement of the guides above the working face of the centre platen enables the latter to be furnished with two working faces. The presence of the second working face makes for a more convenient readjustment when machining workpieces on the same type and ensures higher output by using the two sides when manufacturing product of the same type.
It is further expedient to pivotally connect the horizontal portion of the centre platen to its vertical portion so as to enable the vertical portion to be swung away from the side guide under the action of a withdrawal mechanism. This makes it possible to perform a simultaneous scratch-free withdrawal of the tools from the workpieces on the machine with simplified kinematics.
It is useful to provide a mechanism connecting the vertical portion of the centre platen to its horizontal portion by means of pivots whose one ends are fixedly connected to the horizontal portion, while the other ends of the pivots are mounted in clips made at the top of the vertical portion of the centre platen.
Such a construction of said mechanism enables a hinged relation between the horizontal and the vertical portion of the centre platen.
It is feasible to make in the bed, immediately below the centre platen, an open longitudinal channel and to mount therein a conveyor for the removal of chips passing thereonto by gravity. Unlike the chutes disposed at the sides of the centre platen as in prior art machines, the channel with the conveyor reduces the machine width.
The above-mentioned and other objects and advantages of the present invention will be best understood from the detailed description of the embodiments thereof with reference to the accompanying drawings, in which the same parts are designated with the same reference numbers and in which:
Figure 1 is a diagrammatic general view of the double-ended multiple-spindle fine boring machine whose guides are disposed on the opposite side with respect to the working face of the centre platen;
Figure 2 is a view along the line ll-ll in Figure 1, showing the centre platen mounted on the bed guides;
Figure 3 is a schematic illustration, with a partial longitudinal section, of the machine embodiment wherein the guide on the centre platen is made in the form of a tube;;
Figure 4 is a view along the line IV-IV in Figure 3, illustrating the centre platen mounted on the guide in the form of a tube;
Figure 5 is aschematic illustration, with a partial longitudinal section, of the machine embodiment wherein the guides are arranged above the working face of the centre platen which is made T-shaped;
Figure 6 is a view along the line VI-VI in Figure 5, representing the T-shaped centre platen provided with one more working face;
Figure 7 is a plan view of Figure 5 showing the horizontal position of the centre platen, made in the form of a plate, wherefrom the vertical portion of the centre platen is suspended by means of pivots;
Figure 8 is a view along the line Vill-Vill in Figure 5, representing the outer platen made U-shaped.
Figure 9 illustrates the position of the cutting tools with respect to the machined surface of the workpieces when the vertical portion of the centre platen is swung in the direction of arrow A;
Figure 10 illustrates the machine embodiment wherein the outer platens are mounted on the guides with a possibility of their traverse.
Figure 11 is a view along the line Xl-Xl in Figure 10, showing an outer platen mounted on the guides and connected to its drive cylinder; and
Figure 12 is a view along the line XII-XII in Figure 10, illustrating the centre platen fixedly mounted on the bed.
A double-ended multiple-spindle horizontal-feed fine boring machine comprises a bed 1 (Figures 1 and 2) with guides 2 having a bearing face 3.
The bed 1 carries out platens 4, 5 and a centre platen 6, the outer platens 4 and 5 being fixedly mounted on the bed 1, whereas the centre platen 6 is movably mounted in the guides 2. The centre platen 6 has a vertically extending working face 7 and is mounted on the guides 2 in such a manner that its of centre gravity C is located below the bearing face 3 of the guides 2. The guides 2 are disposed on the opposite side with respect to the working face 7 of the centre platen 6.
A multiple-position device 8 for clamping workpieces 9 is mounted on the working face 7. The centre platen 6 is connected to a drive made in the form of a hydraulic cylinder (not shown) for reciprocating the centre platen in a horizontal direction.
The outer platens 4 and 5 extend vertically and carry spindle heads 10 mounted thereon, whose geometrical axes are parallel to the working face 7 of the centre platen 6. The spindle heads 10 are intended for holding the cutting tools therein.
In the bed 1 there is provided an open channel 11 disposed immediately below the centre platen 6.
Mounted in the channel 11 is a conveyor 12. A pan 13 for receiving chips passing thereafter onto the conveyor 12 is arranged under the spindle heads 10.
For a better illustration of the double-ended multiple-spindle fine boring machine according to the present invention, its operation is shown in a semiautomatic mode, the means providing for the mode being not described to avoid misunderstanding.
The herein disclosed double-ended multiplespindle fine boring machine operates as follows.
The workpieces 9 to be machined from both ends are clamped in the multiple-position device 8 (Figure
1). The centre platen 6 is rapidly moved on the guides 2 (Figure 2) by the hydraulic cylinder (not shown) to one of the outer platens, for instance, to the outer platen 4. As the workpieces 9 reach cutting tools 14, a command is delivered for engagement of the working feed and for rotation of the cutting tools
14 of the spindle heads 10 to machine one ends of the workpieces 9. On completion of the machining, a command is given for the reverse, i.e., for withdra
wing the centre platen 6 from the outer platen 4 and
advancing the centre platen 6 to the outer platen 5.
Machining the opposite end of the workpieces is done in a manner similar to that described above. On completion of the machining of the workpieces 9, the centre platen 6 is withdrawn to the loading position.
Cutting fluid supplied in abundance into the cutting zone washes off the chips which slip down by gravity into the pan 13 and pass onto the conveyor
12, which discharges the chips outside of the
machine.
In an embodiment of the machine (Figures3 and 4), the guide 2 of the centre platen 6 is made in the form of a tube disposed on the opposite side with respect to the working face of the centre platen 6.
Strips 15 with the bearing faces 3 formed thereon are attached to the top portion of the guide 2 (Figure 4).
A side guide 16 is provided on the bed 1. The centre platen 6 is made L-shaped with its horizontal portion disposed on the bearing faces 3, while the vertical portion contacts the side guide 16. To ensure a reliable contact of the vertical portion of the centre platen 6 with the side guide 16, the vertical portion is constantly pressed against the side guide by a mechanism 17. The mechanism 17 represents a hydraulic cylinder whose rod carries a plate 18 made of a material with a low friction coefficient.
The above-described embodiment of the machine operates in a manner similar to the embodiment shown in Figures 1 and 2.
In another embodiment of the machine (Figures 5 and 6,7 and 8), the guides are arranged above the working face 7 of the centre platen 6 (Figure 6) and mounted on the outer platens 4 and 5. The centre platen 6 is of a T-shape with the horizontal portion 19 made in the form of a plate laid onto the bearing faces 3 of the guides 2. The vertical portion 20 of the centre platen 6 has one more working face 7', i.e., the working faces 7 are disposed on both sides of the vertical portion.
The bed 1 is provided with a side guide 16 contacted by the bottom of the vertical portion 20 of the centre platen 6. For a reliable contact of the vertical portion 20 with the side guide 16, the vertical portion is pressed against the side guide by a mechanism 17. A withdrawal mechanism 21 in the form of a hydraulic cylinder is mounted on the bed 1, on the opposite side with respect to the mechanism 17, for swinging the vertical portion 20 away from the side guide 16.
The horizontal portion 19 has a port 22 and carries fixed brackets 23 having apertures to receive pivots 24 with flanges 25 intended for a rigid attachment of the pivots 24 to the brackets 23 (Figures 6 and 7).
The vertical portion 20 of the centre platen 6 has at its top a device 26 for enabling the vertical portion to be swung away from the side guide 16. The device 26 represents a hinge comprising clips 27 which embrace the pivots 24 and are tied by screws 28. The clips 27 are fixedly attached to the vertical portion 20.
The outer platens 4 and 5 are U-shape in plan
(Figure 8). The outer walls of the platens carry spindle heads 10, while the inner spaces 29 are
intended for accommodating the vertical portion 20 of the centre platen 6 in its extreme positions.
The horizontal portion 19 is connected with the drive of the centre platen 6, made in the form of a
hydraulic cylinder (not shown).
The above-described embodmentofthe machine
operates as follows.
When machining workpieces of the same type, the workpieces 9 are clamped in the devices 8 mounted
on both working faces 7 and 7'.
The centre platen 6, moving in guides 2, is rapidly
advanced to one of the outer platens 4 or 5 under the
action of the hydraulic cylinder (not shown). On
reaching the outer platen 4, a command is given for
engagement of the wcrking feed and for rotation of
cutting tools 14 fitted in the spindle heads 10 to
effect a simultaneous machining of the workpieces 9
located on both sides of the centre platen 6.
As the machining is completed, a command is
delivered for stopping the spindles of the heads 10
and setting the cutting tools 14 into an angular
position (Figure 9) which ensures formation of gaps
between the points of the cutting tools 14 and the
machined surfaces of the workpieces 9 after the
vertical portion 20 has been swung away from the
side guide 16 by the withdrawal mechanism 21. With
the vertical portion 20 in this position, a command is
delivered for reversing the centre platen 6 and
advancing it to the outer platen 5. During the
traverse of the centre platen 6, a scratch-free extrac
tion of the cutting tools 14 is accomplished owing to
the gaps formed between the tools and the
machined surfaces of the workpieces.After the
cutting tools 14 have been withdrawn from the
machined workpieces 9, a command is given for
pressing the vertical portion 20 against the side
guide 16. Machining the opposite ends of the
workpieces 9 is done in a similar way.
It is still another embodiment of the invention
(Figures 10, 11, and 12), the outer platens 4 and 5 are
movably mounted in guides 2 (Figure 11), while the
centre platen 6 (Figure 12) is fixedly installed on the
bed 1. The device 8 for clamping the workpieces 9 is
mounted on the working face 7 of the centre platen
6. The outer platens 4 and 5 carry spindle heads 10
and are connected with hydraulic cylinders 30 for
effecting a reversing travel of the outer platens in a
horizontal direction with respect to the centre platen
6. The outer platens 4 and 5 are mounted in the
guides 2 in such a manner that the centres of gravity
C of the outer platens are located below the working
faces 3 of the guides 2.
The above-described embodiment of the machine
operates as follows.
The workpieces to be machined from both ends
are clamped in the device 8 (Figure 7).
In accordance with the semiautomatic mode of the machine operation, a command is delivered to
hydraulic cylinders 30 for a simultaneous and rapid
advance of the outer platens 4 and 5 to the centre platen 6. After the cutting tools 14 of the spindle
heads 10 of both outer platens 4 and 5 placed on the
centre platen 6 have reached the workpieces 9, a
command is given for engagement of the working
feed and for rotation of the spindle heads 10 to effect
machining of both ends of the workpieces simul
taneously. On completion of the machining, a com
mand is given to withdraw the outer platens 4 and 5
from the centre platen 6.
It is expedient to employ the above-described
embodiment of the double-ended multiple-spindle
horizontal-feed fine boring machine when a sharp
increase in the output is required. Besides, it serves
as an example confirming that the reverse travel of
the platens in accordance with the invention can be
accomplished in two ways, viz.: either the centre
platen 6 is movably mounted on the guides 2 for
horizontal relative movement with respect to the
outer platens 4 and 5 (Figures 1,3, and 5) fixedly
mounted on the bed 1, orthe outer platens 4 and 5 (Figure 10) are mounted on the guides 2 for horizontal movement with respect to the centre platen 6 fixedly mounted on the bed 1.
While particular embodiments of the invention have been shown and described, various modifications thereof will be apparent to those skilled in the art, and therefore it is not intended that the invention be limited to the disclosed embodiments or to the details thereof and the departures may be made therefrom within the spirit and scope of the invention as defined in the claims.
Claims (8)
1. A double-ended multiple-spindle horizontal feed fine boring machine on whose be outer platens and a centre platen are mounted for relative movement on the bearing faces of bed guides to effect the feed, the centre platen having a working face arranged in a vertical plane, whereon a device for clamping the workpieces is mounted, the outer platens extending vertically and carrying spindle heads whose axes are parallel to the working face of the centre platen, and the bearing faces of the guides being disposed above the centre of gravity of each platen mounted thereon.
2. A machine according to claim 1, wherein the centre platen contacts the bed guides with the side opposite to its working face.
3. A machine according to claim 1, wherein the guides are arranged above the working face of the centre platen and mounted on the outer platens, the centre platen is of a T-shape whose horizontal portion contacts the bearing faces of the guides while its vertical portion has a working face and contacts a side guide provided on the bed and serving as an additional guide of the centre platen.
4. A machine according to claims 1 and 3, wherein the centre platen has one more working face arranged on the side opposite to the working face.
5. A machine according to claims 1,3, and 4, wherein the horizontal portion of the centre platen is connected to the vertical portion by means of a mechanism enabling the vertical portion to be swung with respect to the horizontal portion for a scratch-free withdrawal of the cutting tools from the machined surfaces.
6. A machine according to claims 1,3,4, and 5, wherein said mechanism comprises pivots, one end of each of the pivots being fixedly connected to the horizontal portion, the other end of each of the pivots being mounted in clips provided at the top of the vertical portion of the centre platen.
7. A machine according to claims 1,3, 4, and 5, wherein a longitudinal open channel is provided in the bed immediately below the centre platen and a conveyor for serving for the removal of chips passing thereinto by gravity is mounted in the channel.
8. A machine substantially as herein described with reference to the acompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7942701A GB2065003B (en) | 1979-12-11 | 1979-12-11 | Double-ended multiple-spindle fine boring machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7942701A GB2065003B (en) | 1979-12-11 | 1979-12-11 | Double-ended multiple-spindle fine boring machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2065003A true GB2065003A (en) | 1981-06-24 |
| GB2065003B GB2065003B (en) | 1984-05-02 |
Family
ID=10509776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7942701A Expired GB2065003B (en) | 1979-12-11 | 1979-12-11 | Double-ended multiple-spindle fine boring machine |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2065003B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1275456A1 (en) * | 2001-07-13 | 2003-01-15 | Luigi Reguzzi | Driving assembly for driving a plurality of mandrels |
| CN105149635A (en) * | 2015-06-30 | 2015-12-16 | 新昌县三特自动化科技有限公司 | Multi-station drilling machine assembly |
| CN105234460A (en) * | 2015-11-06 | 2016-01-13 | 天津市晟岛科技有限公司 | Perforating device |
| CN108788222A (en) * | 2018-08-06 | 2018-11-13 | 广州景兴建筑科技有限公司 | A kind of automation drilling machine |
-
1979
- 1979-12-11 GB GB7942701A patent/GB2065003B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1275456A1 (en) * | 2001-07-13 | 2003-01-15 | Luigi Reguzzi | Driving assembly for driving a plurality of mandrels |
| CN105149635A (en) * | 2015-06-30 | 2015-12-16 | 新昌县三特自动化科技有限公司 | Multi-station drilling machine assembly |
| CN105234460A (en) * | 2015-11-06 | 2016-01-13 | 天津市晟岛科技有限公司 | Perforating device |
| CN108788222A (en) * | 2018-08-06 | 2018-11-13 | 广州景兴建筑科技有限公司 | A kind of automation drilling machine |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2065003B (en) | 1984-05-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |