CA2017343A1 - Device for automatically filling the die of a powder press - Google Patents
Device for automatically filling the die of a powder pressInfo
- Publication number
- CA2017343A1 CA2017343A1 CA 2017343 CA2017343A CA2017343A1 CA 2017343 A1 CA2017343 A1 CA 2017343A1 CA 2017343 CA2017343 CA 2017343 CA 2017343 A CA2017343 A CA 2017343A CA 2017343 A1 CA2017343 A1 CA 2017343A1
- Authority
- CA
- Canada
- Prior art keywords
- filling
- die
- adjusting
- swing lever
- filling device
- 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.)
- Abandoned
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/004—Filling molds with powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
- B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
- B28B13/023—Feeding the moulding material in measured quantities from a container or silo by using a feed box transferring the moulding material from a hopper to the moulding cavities
- B28B13/0245—Rotatable feed frames, e.g. horizontally rotated over 90 degrees
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
- B30B11/04—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with a fixed mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/30—Feeding material to presses
- B30B15/302—Feeding material in particulate or plastic state to moulding presses
- B30B15/304—Feeding material in particulate or plastic state to moulding presses by using feed frames or shoes with relative movement with regard to the mould or moulds
Abstract
ABSTRACT OF THE DISCLOSURE
A device for automatically filling a die of a powder press with metal or ceramic powder. The filling device includes a filling shoe connected through flexible hoses to a powder reservoir. An adjusting device coupled to the press drive moves the filling shoe in work cycles back and forth relative to the die between a waiting position and a filling position through a swing lever system and a cantilever arm operated by the swing lever system. The adjusting device includes an oscillating cam mechanism for moving the swing lever system. The oscillating cam mechanism is mounted on a bracket which can be moved relative to the press frame by adjusting drives in three directions which extend perpendicularly to each other. The oscillating cam mechanism is permanently connected through a longitudinally adjustable universal shaft to an intermediate transmission which is connected to the press drive. The cantilever arm is longitudinally movably guided in a guiding joint which can be swiveled about an axis which extends parallel to the bearing axis of the swing lever system. The guiding joint is mounted in a support member which is displaceable along a vertical guide supported by the oscillating cam mechanism.
A device for automatically filling a die of a powder press with metal or ceramic powder. The filling device includes a filling shoe connected through flexible hoses to a powder reservoir. An adjusting device coupled to the press drive moves the filling shoe in work cycles back and forth relative to the die between a waiting position and a filling position through a swing lever system and a cantilever arm operated by the swing lever system. The adjusting device includes an oscillating cam mechanism for moving the swing lever system. The oscillating cam mechanism is mounted on a bracket which can be moved relative to the press frame by adjusting drives in three directions which extend perpendicularly to each other. The oscillating cam mechanism is permanently connected through a longitudinally adjustable universal shaft to an intermediate transmission which is connected to the press drive. The cantilever arm is longitudinally movably guided in a guiding joint which can be swiveled about an axis which extends parallel to the bearing axis of the swing lever system. The guiding joint is mounted in a support member which is displaceable along a vertical guide supported by the oscillating cam mechanism.
Description
7 q ~ ~
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates to a filling device for automatically filling the die of a powder press. The filling device includes a filling shoe connected through flexible hoses to a powder reservoir. An adjusting device coupled to the press drive moves the filling shoe in work cycles back and forth relative to the die between a waiting position and a filling position by means of a swing lever system and a cantilever arm operated by the swing lever system.
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BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates to a filling device for automatically filling the die of a powder press. The filling device includes a filling shoe connected through flexible hoses to a powder reservoir. An adjusting device coupled to the press drive moves the filling shoe in work cycles back and forth relative to the die between a waiting position and a filling position by means of a swing lever system and a cantilever arm operated by the swing lever system.
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2. Descri~tion of the Related Art Filling devices of the above-described type are known in ~ the art. In the known devices, the swing lever system for ;~ the cantilever arm which supports and moves the filling shoe is a parallelogram linkage which is movable about stationary ~ bearing axes on the press frame. The drive of this I '`!'1 parallelogram linkage is effected by means of a cam disk in -~
accordance with the work cycle of the powder press.
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To ensure that the filling shoe can exactly follow the lifting and lowering movements of the die within the powder press, the filling shoe is connected to the free end of the cantilever arm so as to be pivotable about a horizontal axis .
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and the cantilever arm, in turn, is mounted on a vertical column so as to be pivotable about a horizontal axis, wherein the vertical column is supported by the swing lever system.
A pressure medium cylinder which is connected to the vertical column and which acts on the cantilever arm is operated in such a way that it keeps the filling shoe in contact with the upper side of the die plate in any vertical position of the die in the waiting position as well as in the filling position of the filling shoe.
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In other known filling devices of the above-described type, the movement of the filling shoe is effected by means of a hydraulic cylinder having an adjustable stroke and the support of the cylinder facilitates a lifting and lowering movement of the filling shoe with the die. These filling devices are used particularly in connection with hydraulically operated powder presses.
However, all filling devices known in the art have the disadvantage that the systems for moving the filling shoe of the filling device require a manual adjustment relative to the die mounted in the powder press.
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Since different tools require different dies and since th~ dies have to carry out different vertical movements during the operation of the powder press, each tool exchange additionally requires substantial manual adjusting .
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operations. Not only the lateral position of the filling shoe and the vertical position of the filling shoe relative to the die must be adjusted, but it is addltionally necessary to adjust the horizontal stroke length and the stroke position of the filling shoe relative to the die.
In the known filling devices, clamping screws are loosened for this purpose on the drive linkage and the connecting pieces are moved and the screws are subsequently ~ ;
tightened. To enable the operator of the press to carry out -these adjusting operations, the powder press must be stopped because the adjusting devices are accessible without danger only when the press stands still. Since some adjusting operations, particularly during th~ start-up phase of the powder press, must be carried out several times, the ~ adjusting procedures are very time-consuming. -~;
: ~ SUMMARY OF THE INVENTION ~:
.~, ' ~ ' .
It is, therefore, the primary object of the present invention to provide a filling device of the aboveldescribed ~-type in which the above-mentioned deficiencies are . , :-- ::-:
eliminated. Specifically, a filling device is to be provided ;~
in which the adjustments of the different system axes of the . ~:
filling shoe cooperating with die can be carried out by ~
remote control and by means of a drive, particularly from a ~;
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central control desk with monitor and operator guidance, even during the o~eration of the press.
' In accordance with the present invention, the above object is met by a filling device in which the adjusting device includes an oscillating cam mechanism for moving the swing lever system. The oscillating cam mechanism is mounted on a bracket which can be moved relative to the press frame by means of adjusting drives in three directions which extend perpendicularly to each other. The oscillating cam mechanism is permanently connected through a longitudinally adjustable universal shaft to an intermediate transmission which is connected to the press drive. The cantilever arm is ~ -longitudinally movably guided in a guiding joint which can be swiveled about an axis which extends parallel to the bearing axis of the swing lever system. The guiding joint, in turn, is mounted in a support member which is displaceable along a vertical guide supported by the oscillating cam mechanism.
The features of the present invention provide a filling device for automatically filling the die of a powder press which is particularly advantageous in practical use and which can be adjusted exactly and quickly to the respective operating conditions of the powder press, wherein the relative positions of the system axes can be made visible and monitored on the monitor of the central control desk.
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In conventional oscillating cam mechanisms, the oscillating cycle of movement on the driven shaft is derived from a uniform rotary drive movement of the drive shaft of a cam-controlled mechanism. Therefore, the swing lever system may be a simple, single-arm lever which is wedged onto the driven shaft of the oscillating cam mechanism. It is particularly advantageous if the effective length of the swing lever system for the cantilever arm can be adjusted within predetermined limits, preferably infinitely variably, by means of an adjusting drive. This possibility of adjustment which is also remote controlled is of a particular advantage if the filling shoe of the filling device is used in the pull-off position of the pressing tool die also have the push-off means for the finished blanks and, therefore, the stroke of the filling shoe between its waiting position and its filling position must be adjusted particularly exactly or must be changed during the operation of the press. -;
For a problem-free operation of the filling device, an ~-important feature of the present invention provides that the support for the guiding joint relative to the vertical guide can be placed under a preferably regulated initial pressure in the direction toward the end face of the pressing die. To -ensure that in this case the mobility of the cantilever arm supporting the filling shoe is not impaired during the stroke ~-~
movement between the waiting position and the filling position, another feature of the present invention provides .
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that the guiding joint is swivelably mounted in the support by means of the roller bearings, that the support moves on the vertical guide by means of ball cages and that the guiding joint receives the cantilever arm also in ball cages.
The preferably regulated initial pressure at the support for the guiding joint can be produced in a simple manner by a --compressed air or compressed gas cylinder which is mounted on the vertical guide and acts on the supports.
In accordance with an advantageous feature of the present invention, at least one column of the vertical guide for support of the guiding joint is tubular and the interior is connected as a compensating space with the compressed air or compressed gas cylinder. The compensating space in the -interior of the guide column can be blocked from the supply ~;~
side by means of a check valve. As a result, while using a L~ compressed air or compressed gas cylinder which is ¦~- structurally as small as possible, a relatively large air or gas volume is available, i.e., the initial pressure changes only to a minimum extent during the lifting and lowering ~; movement of the die.
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~` ~ In accordance with another feature, one of the remote controlled adjustment drives for the bracket acts on a vertical carriage which moves in straight-line guides. The vertical carriage, in turn, supports a horizontal cross-slide I which is also provided with straight-line guides. The cross-slide can be actuated by two adjustment drives which act at a right angle relative to each other.
For an exact remote control and monitoring, the present invention provides that incremental sensors are provided for the adjustment drive on the vertical carriage and on the adjustment drive of the cross-slide. These sensors interact with the control desk or operator control and ensure an exact monitoring and remote control of the adjustment drive.
. , ~ ,, :-In accordance with another important further development of the invention, the straight-line guide of the vertical carriage and of the cross-slide each have clamping devices ~
which are automatically releasable when the adjustment drive ;
is actuated and are tightened when the adjustment drive is ;
not operated. Thus, positioning of vertical carriage and cross-slide by means of the adjustment drive can be facilitated and secured. ;~
~" j , Another advantageous feature of the invention provides that the bracket which supports the oscillating cam mechanism supports an arm which is pivotable about a vertical ~ axis. A support plate is mounted on the pivotable arm on the --~ same level as the respective die plate. When the support plate is in a pivoted position at the die plate, the support plate forms a support for the filling shoe on which the 8 ~`
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-, filling shoe can be moved from its waiting position to a position of rest. This is done when during a pressing tool exchange, the press die must also be replaced-The adjustment drive for the vertical carriage may be alifting spindle drive, while the adjustment drives at the cross-slide may be screwed spindle drives or transmissions.
The lifting spindle drive is mounted at both ends in joints one of which is in the press frame and the other of which is on the bracket. The screw spindles of the screw spindle drive, on the other hand, interact with a nut which is mounted at the corresponding carriage of the cross-slide.
The intermediate transmission connected to the press drive for the longitudinally adjustable universal shaft is preferably an angular transmission which can be adjusted between two basic positions which are offset relative to each other by 180, so that the operation of the filling device is not only for the manufacture of powder blanks but also for using the powder press for calibrating the powder blanks.
The filling device according to the present invention has the advantage that, with the exception of the vertical movement of the bracket, all other system axes can be adjusted during operation of the powder press. Another advantage is the fact that the adjustment values can be stored and can be repeated later at any time. During a ~; ~
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pressing tool change or an adapter change, the filling shoe can be moved by pressing a button from its braking position back into its position of rest on the support plate without losing any powder in the filling shoe or in the powder line.
Other advantages provided by a filling device according to the present invention are:
- ease of operation; -~
- reduction of idle periods;
- increase in production; ~-~
- a uniform operation cycle because interruptions for the adjustment procedures of the filling device are ;~
~ avoided;
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~ - increased adjustment accuracy; and ,~
- increased repeat accuracy.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had to the drawing and descriptive matter ,, $
in which there is illustrated and described~a preferred embodiment of the invention.
¦ BRIEF DESCRIPTION OF THE DRAWING
In the drawing:
Fig. 1 is a schematic side view of a filling device for automatically filling the die of a powder press;
Fig. 2 is a schematic top view of the filling device of Fig. 1;
Fig. 3 is view, on a large scale and partially in section, of the essential components of the adjusting device for the filling device of Figs. 1 and 2;
, Fig. 4 is a view, on an even larger scale, of the detail IV of the adjustment device of Fig. 3;
,~' , ' ~''' , j , Fig. 5 is a partially sectional view taken along line V-V in Fig. 4; and ,:~
Fig. 6 is a sectional view taken along line VI-VI in Fig. 4.
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2 ~ 3 DESCRIPTION OF THE PREFERRED EMBODIMENT
Figs. 1 and 2 of the drawing are a side view and a top view of a device 1 for automatically filling the die 2 of a pressing tool in a powder press.
The filling device 1 interacts through a filling shoe 3 with the die 2 of the pressing tool. The filling shoe 3 is placed on the end face of a die plate 4 and can be moved on ~
this end face over a distance or stroke 5 between a rearward ~;-waiting position and a forward filling position. In Figs. 1 and 2 of the drawing, the rearward waiting position of the shoe 3 is shown in solid lines and the forward filling position of the filling shoe 3 is shown in dash-dot lines.
The filling shoe 3 is in continuous connection through a ~-flexible filling hose 6 with a powder reservoir or silo, not shown, and is supplied from the reservoir or silo continuously with metal powder and/or ceramic powder which is -~
to be compressed in the powder press into blanks.
The filling shoe 3 is pivotally mounted in a stirrup 8 . : .; : ~ ;
through horizontal joints 7. The stirrup 8 forms the front ;`
end of a cantilever arm 9. A joint carrier 10 is provided at or near the rearward end of the cantilever arm 9. A swing lever 11 which is wedged onto the driven shaft of an oscillating cam mechanism 13 acts on the joint carrier 10.
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The oscillating cam mechanism 13 is of conventional construction and utilizes a cam-controlled mechanism for generating an oscillating drive movement for the swing lever 11 from a uniform drive lever. A rotation of the drive shaft 14 produces an oscillating movement cycle at the driven shaft 12. An end position of the swing lever 11 is shown in Fig. 1 of the drawing in solid lines, while the other end position is partially illustrated in dash-dot lines. The oscillating movement may extend, for example, over an angle of approximately 60. ---The drive shaft of the oscillating cam mechanism 13 isconnected through a universal shaft 15 to an intermediate transmission 16 which, for example, is formed by a miter gear unit and is directly connected to the drive of the powder ~ -press.
The universal shaft 15 which continuously connects the intermediate transmission 16 to the oscillating cam mechanism 13 is constructed so as to be longitudinally adjustable in the known manner and is equipped with two Cardan or universal joints, so that an axial misalignment between the drive shaft 14 of the oscillating cam mechanism 13 and the parallel driven shaft 17 of the intermediate transmission 16 can be compensated without problems.
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The oscillating cam mechanism 13 which moves the swing lever 11 is mounted on a bracket 18 which, in turn, is supported by a vertical carriage 19 which can be moved vertically adjustably along a stationary guide member 20, for example, on the press frame 21, in accordance with the double arrow 22 in Fig. 1.
The bracket 18 is provided with a horizontally directed guide member 23 which, in turn, supports a cross-slide 24.
The cross-slide has a longitudinal carriage which is movably :;
mounted in the guide member 23 of the bracket 18 parallel to ~.
the plane of movement of the swing lever 11 or the cantilever ~:-arm 9. A transverse carriage 27, in turn, is adjustable in ~.
guide member 26 of the longitudinal carriage 25. The transverse carriage 27 forms the actual support for the -oscillating cam mechanism 13. ~.
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- The cross-slide 24 makes it possible to change the position of the oscillating cam mechanism 13 on the bracket 28 parallel to the plane of movement of the cantilever arm 9 ,~ , and the swing lever 11 as well as in horizontal direction ~ -~
transversely of the plane of movement of cantilever arm 9 and swing lever 11. Thus, the filling shoe 3 can be moved ; .
relative to the die plate 4 in the direction of double arrow .~
28 between a waiting position in which the filling shoe is on ::
the die plate 4 and a position of rest in which the filling ~;.
shoe is completely pulled off from the die plate 4. This `~
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displacement in the direction of double arrow 28 takes place without changing the distance or stroke 5 which the filling shoe 3, driven by the swing lever 11 and the cantilever arm 9, has to travel between its waiting position and its filling position.
On the other hand, by displacing the transverse carriage .
27, it is possible, if necessary, to change the alignment of ~ the filling shoe 3 relative to the die 2 or die plate 4 ¦ transversely to its own direction of movement in accordance with the double arrow 29.
The vertical displacement of the bracket 18 by means of vertical carriage 19 along the guide member 20 in the direction of double arrow 22 has the purpose to adjust the vertical position of the filling shoe 3 exactly to different structural heights of the dies 2 arranged in the powder press.
~ ~, : The vertical displacement, the longitudinal displacement I ~ , and the;transverse displacement of the oscillating cam mechanism 13 with swing lever 11 and cantilever arm 9 for the filling shoe 3 is remote controlled through adjustment drives, for example, from the control disk of the powder ~; press by means of an operator guidance and monitor control.
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For example, a lifting spindle drive 30 serves as the adjustment drive for the vertical displacement of the bracket 18 in the direction of double arrow 22 by means of the vertical carriage 19 along the guide member 20 or the press frame 21. The lifting spindle drive 30 rests, on the one hand, in a support joint 31 of the guide member 20 for the press frame 21, and, on the other hand, in a connecting joint 32 of the bracket 18. The axes of the support joint 31 and the connecting joints 32 are aligned parallel to the driven shaft 12 of the oscillating shaft mechanism 13.
~ ' The adjustment drive for the longitudinal carriage 25 of ~`
the cross-slide 4, on the other hand, is a screw spindle drive 33 which is mounted on the bracket 18 and engages with its screw spindle 34 in a spindle nut 35 of the longitudinal carriage 25.
A similar screw spindle drive 36 is mounted on the :
longitudinal carriage 25 and interacts with the transverse ~-carriage 27 through its screw spindle 37.
Finally, another adjustment drive 38 can be provided :
which is mounted on the swing lever 11 and acts on the joint carrier 10. This adjustment drive 38 makes it possible to -change the effective length of the swing lever relative to the driven shaft 12 of the oscillating cam mechanism 13. As a .
result, preferably by means of remote control from the ~-~ ~3 ~ 7 3 '~ ~
control desk of the powder press, the length of the distance or stroke 5 of the filling shoe 3 between its waiting position and its filling position can be influenced in an infinitely variable manner.
In order to obtain a proper interaction between the filling device 1 and the die 2 or die plate 4 mounted in the powder press, it is of significant importance that the cantilever arm 9 travels longitudinally movably in a guide joint 40 which is pivotable about an axis 39 which extends parallel to the driven shaft 12 of the oscillating cam mechanism 13 and, thus, to the bearing axis of the swing lever 11. The guide joint 40, in turn, is mounted in a ~:
carrier 41 which travels on a vertical guide member 42 mounted on a cantilever 43 which, in turn, is supported by the oscillating cam mechanism 13. The carrier 41 of the guide joint 40 is acted on by a compressed air or compressed gas cylinder 44 which is subjected to a preferably :
controllable initial pressure and, thus, continuously holds the filling shoe 3 in contact with the end face of the die plate 4. The effective length of the vertical guide member 42 is adjusted to the maximum vertical difference of the die .
2 mounted in the powder press. The stroke of the compressed air or compressed gas cylinder 44 is also adjusted to the maximum respective length of the vertical guide member 42, wherein the filling space of the cylinder 44 is automatically readjusted, so that the adjusted initial pressure is ~ 7y~
maintained, i.e., the filling shoe 3 is always pressed with the same contact force against the end face of the die plate 4.
As Figs. 1 and 2 further show, the bracket 18 has an arm 45 underneath the cantilever 43 mounted on the oscillating ;~
cam mechanism 13. A support plate 46 is mounted on the arm 45 at the same level as the die plate 4. The support plate ;
46 is mounted on the arm 45 so as to be pivotable about a vertically directed bearing 47, so that, if necessary, the support plate 46 can be pivoted immediately closely adjacent to the die plate 4, as shown in dash-dot lines in Figs. 1 and 2. In this case, the support plate 46 may form a support on -which the filling shoe 3 can be moved from its waiting position into a position of rest by means of the longitudinal .~-carriage 25. The filling shoe 3 must be moved into this position of rest when the die 2 or an adapter device including the die 2 has to be changed. The support plate 46 prevents the loss of any metal powder and/or ceramic powder in the filling shoe 3.
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Flg. 3 of the drawing shows, on a larger scale and partially in section, the operationally important structural components of the adjusting device which operates the filling device 1. As can be seen in Fig. 3, the drive shaft 14 for ~
the oscillating cam mechanism 13 extends through an opening --48 of the bracket 18. The dlmensions of the opening 48 are :.
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adjusted to the adjusting distance of the longitudinal carriage 25 and the adjusting distance of the transverse carriage 27. The drive shaft 14 also extends through a transverse slot 49 in the longitudinal carriage 25 and a cutout 50 in the transverse carriage 27 of the cross-slide 24, wherein the transverse slot 49 is adjusted in its length to the adjustment distance of the transverse carriage 27.
As Fig. 3 further shows, the intermediate transmission 16 constructed as an angular transmission, for example, a bevel gear unit, includes a shifting device including, for example, a shifting lever 51. This shifting device preferably makes possible a shifting particularly by 180, so that the powder press equipped with the filling device 1 can not only be used for the actual manufacture of blanks from powder material but also makes possible a calibration of such blanks. In the latter case, the filling shoe 3 of the filling device can also be used as a transfer device for the calibrated blanks in the push-off position of the calibrating tool.
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As Fig. 3 additionally shows, clamping cylinders 52 are provided between the vertical carriage 19 and a guide member 20. Clamping cylinders 53 are additionally mounted between the bracket 18 and the longitudinal carriage 25 of the cross-slide 24. Finally, such clamping cylinders 54 are also mounted between the longitudinal carriage 25 and the traverse carriage 27 of the cross-slide 24.
The adjusting drives 30, 33, 36 and 38 are each equipped with incremental sensors which determine the position of the respective carriage and convey the position to the control desk, the monitor and the operator control.
''''~, As Fig. 3 further illustrates, the guiding joint 40 for the cantilever arm 9 is equipped with ball cages 55 in which ;
the cantilever arm 9 travels longitudinally slidably so as to be easily movable at any angular position.
As Fig. 3 further indicates, covers 56 and 57 are arranged in the longitudinal carriage 25 and its guide member 23 as well as the transverse carriage 27 and its guide member 26. These covers 56 and 57 overlap in the manner of scales and are longitudinally displaceable in adjusting direction, in order to protect particularly the screw spindles 34 and 37 of the screw spindle drives 33 and 36.
Fig. 4 of the drawing shows on a larger scale that the cantilever arm 9 in the guiding joint 40 is easily slidably guided by means of two ball cages which are arranged one -after the other. As Figs. 4 and 5 also clearly show, the -~
compressed air or compressed gas cylinder 44 with piston rod 58 acts on the carrier 41 for the guiding joint 40 in the 2 ~ L i ~ ~ ~
middle between two vertical guiding columns of the vertical `
guide member 42 which can be seen in Figs. 5 and 6.
The easy pivoting motion of the guiding joint 40 about its axis 39 in carrier 41 is ensured by pins 60 arranged in alignment with the axis 39 on both sides of the guiding joint 40 which pins 60 are received by roller bearings 61 which are mounted in side walls 62 of the carrier 41. The roller bearing 61 in one wall 62 of the carrier 41 can be a radial ball bearing, while the roller bearing 61 in the other wall 62 of the carrier 41 may be an axial/radial double ball bearing. A particularly easy mobility of the carrier 41 for the guiding joint 40 along the guide column 69 of the vertical guide 42 can be achieved if, in accordance with Fig.
6, two ball cages 63 are also arranged in the side walls 62, wherein the ball cages 63 provide the exact longitudinal guidance.
As can be concluded from Figs. 4 to 6 of the drawing, the supply with compressed air or compressed gas of the compressed air or compressed gas cylinder 44 is provided through one of the guide columns 59 of the vertical guide member 42. For this purpose, at least one of the guide columns 59 is tubular or provided with a bore in the longitudinal direction. A check valve 66 is arranged between the line 65 from the pressure regulator 64 and the lower end i 3 ~ ~
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of the tubular guide column 59. The locking position of the check valve 66 acts against the line 65 (see Figs. 4 and 5).
As shown in Fig. 5, a connecting line 67 is provided between the upper end of the tubular guide column 59 and the compressed air or compressed gas cylinder 44. As a result of this configuration, the hollow space of the tubular guide column 59 seen in Fig. 6 is in communication as an air or gas reservoir with the compressed air or compressed gas cylinder 44, so that the air or gas volume acting on the cylinder 44 is substantially greater than the volume of the cylinder 44 itself. Accordingly, the compressed air or compressed gas cylinder 44 may have a relatively short structural length, wherein this structural length does not have to be significantly greater than the maximum ad~usting distance traveled by the carrier 41 on the guide member 42. In any case, a sufficiently great air or gas cushion is still -~
available at the cylinder 44 in order to provide the elastic support effect of the cylinder 44 for the carrier 41.
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, I Finally, it is noted that not only the guide member 20 for the vertical carriage 19 at the press frame, but also the guide members 23 and 26 for the longitudinal carriage 25 and the transverse carriage 27 of the cross-slide 24 are arranged and constructed such that they can be released or loosened by ;~
means of remote controlled clamping cylinders 52, 53 and 54 prior to the actuation of the respective adjusting drive 30 ~ ~ ,L 7 ~
, or 33 or 36. When the adjusting drives 30, 33 and 36 are stopped, the guide members 20, 23 and 26 are also tightened by means of these clamping cylinders.
While a specific embodiment of the invention has been shown and described in detail to illustrate the application of the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.
accordance with the work cycle of the powder press.
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To ensure that the filling shoe can exactly follow the lifting and lowering movements of the die within the powder press, the filling shoe is connected to the free end of the cantilever arm so as to be pivotable about a horizontal axis .
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and the cantilever arm, in turn, is mounted on a vertical column so as to be pivotable about a horizontal axis, wherein the vertical column is supported by the swing lever system.
A pressure medium cylinder which is connected to the vertical column and which acts on the cantilever arm is operated in such a way that it keeps the filling shoe in contact with the upper side of the die plate in any vertical position of the die in the waiting position as well as in the filling position of the filling shoe.
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In other known filling devices of the above-described type, the movement of the filling shoe is effected by means of a hydraulic cylinder having an adjustable stroke and the support of the cylinder facilitates a lifting and lowering movement of the filling shoe with the die. These filling devices are used particularly in connection with hydraulically operated powder presses.
However, all filling devices known in the art have the disadvantage that the systems for moving the filling shoe of the filling device require a manual adjustment relative to the die mounted in the powder press.
'~'.
Since different tools require different dies and since th~ dies have to carry out different vertical movements during the operation of the powder press, each tool exchange additionally requires substantial manual adjusting .
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operations. Not only the lateral position of the filling shoe and the vertical position of the filling shoe relative to the die must be adjusted, but it is addltionally necessary to adjust the horizontal stroke length and the stroke position of the filling shoe relative to the die.
In the known filling devices, clamping screws are loosened for this purpose on the drive linkage and the connecting pieces are moved and the screws are subsequently ~ ;
tightened. To enable the operator of the press to carry out -these adjusting operations, the powder press must be stopped because the adjusting devices are accessible without danger only when the press stands still. Since some adjusting operations, particularly during th~ start-up phase of the powder press, must be carried out several times, the ~ adjusting procedures are very time-consuming. -~;
: ~ SUMMARY OF THE INVENTION ~:
.~, ' ~ ' .
It is, therefore, the primary object of the present invention to provide a filling device of the aboveldescribed ~-type in which the above-mentioned deficiencies are . , :-- ::-:
eliminated. Specifically, a filling device is to be provided ;~
in which the adjustments of the different system axes of the . ~:
filling shoe cooperating with die can be carried out by ~
remote control and by means of a drive, particularly from a ~;
:, ~: ' ''-' ~:- :
~ 4 :.';`"``'`.`
2 ~J ~ 7 ~S ~
central control desk with monitor and operator guidance, even during the o~eration of the press.
' In accordance with the present invention, the above object is met by a filling device in which the adjusting device includes an oscillating cam mechanism for moving the swing lever system. The oscillating cam mechanism is mounted on a bracket which can be moved relative to the press frame by means of adjusting drives in three directions which extend perpendicularly to each other. The oscillating cam mechanism is permanently connected through a longitudinally adjustable universal shaft to an intermediate transmission which is connected to the press drive. The cantilever arm is ~ -longitudinally movably guided in a guiding joint which can be swiveled about an axis which extends parallel to the bearing axis of the swing lever system. The guiding joint, in turn, is mounted in a support member which is displaceable along a vertical guide supported by the oscillating cam mechanism.
The features of the present invention provide a filling device for automatically filling the die of a powder press which is particularly advantageous in practical use and which can be adjusted exactly and quickly to the respective operating conditions of the powder press, wherein the relative positions of the system axes can be made visible and monitored on the monitor of the central control desk.
2~ ~ 4 ~
In conventional oscillating cam mechanisms, the oscillating cycle of movement on the driven shaft is derived from a uniform rotary drive movement of the drive shaft of a cam-controlled mechanism. Therefore, the swing lever system may be a simple, single-arm lever which is wedged onto the driven shaft of the oscillating cam mechanism. It is particularly advantageous if the effective length of the swing lever system for the cantilever arm can be adjusted within predetermined limits, preferably infinitely variably, by means of an adjusting drive. This possibility of adjustment which is also remote controlled is of a particular advantage if the filling shoe of the filling device is used in the pull-off position of the pressing tool die also have the push-off means for the finished blanks and, therefore, the stroke of the filling shoe between its waiting position and its filling position must be adjusted particularly exactly or must be changed during the operation of the press. -;
For a problem-free operation of the filling device, an ~-important feature of the present invention provides that the support for the guiding joint relative to the vertical guide can be placed under a preferably regulated initial pressure in the direction toward the end face of the pressing die. To -ensure that in this case the mobility of the cantilever arm supporting the filling shoe is not impaired during the stroke ~-~
movement between the waiting position and the filling position, another feature of the present invention provides .
~:
that the guiding joint is swivelably mounted in the support by means of the roller bearings, that the support moves on the vertical guide by means of ball cages and that the guiding joint receives the cantilever arm also in ball cages.
The preferably regulated initial pressure at the support for the guiding joint can be produced in a simple manner by a --compressed air or compressed gas cylinder which is mounted on the vertical guide and acts on the supports.
In accordance with an advantageous feature of the present invention, at least one column of the vertical guide for support of the guiding joint is tubular and the interior is connected as a compensating space with the compressed air or compressed gas cylinder. The compensating space in the -interior of the guide column can be blocked from the supply ~;~
side by means of a check valve. As a result, while using a L~ compressed air or compressed gas cylinder which is ¦~- structurally as small as possible, a relatively large air or gas volume is available, i.e., the initial pressure changes only to a minimum extent during the lifting and lowering ~; movement of the die.
.~
~` ~ In accordance with another feature, one of the remote controlled adjustment drives for the bracket acts on a vertical carriage which moves in straight-line guides. The vertical carriage, in turn, supports a horizontal cross-slide I which is also provided with straight-line guides. The cross-slide can be actuated by two adjustment drives which act at a right angle relative to each other.
For an exact remote control and monitoring, the present invention provides that incremental sensors are provided for the adjustment drive on the vertical carriage and on the adjustment drive of the cross-slide. These sensors interact with the control desk or operator control and ensure an exact monitoring and remote control of the adjustment drive.
. , ~ ,, :-In accordance with another important further development of the invention, the straight-line guide of the vertical carriage and of the cross-slide each have clamping devices ~
which are automatically releasable when the adjustment drive ;
is actuated and are tightened when the adjustment drive is ;
not operated. Thus, positioning of vertical carriage and cross-slide by means of the adjustment drive can be facilitated and secured. ;~
~" j , Another advantageous feature of the invention provides that the bracket which supports the oscillating cam mechanism supports an arm which is pivotable about a vertical ~ axis. A support plate is mounted on the pivotable arm on the --~ same level as the respective die plate. When the support plate is in a pivoted position at the die plate, the support plate forms a support for the filling shoe on which the 8 ~`
2 ~ 'l fi ~ ~ ~
-, filling shoe can be moved from its waiting position to a position of rest. This is done when during a pressing tool exchange, the press die must also be replaced-The adjustment drive for the vertical carriage may be alifting spindle drive, while the adjustment drives at the cross-slide may be screwed spindle drives or transmissions.
The lifting spindle drive is mounted at both ends in joints one of which is in the press frame and the other of which is on the bracket. The screw spindles of the screw spindle drive, on the other hand, interact with a nut which is mounted at the corresponding carriage of the cross-slide.
The intermediate transmission connected to the press drive for the longitudinally adjustable universal shaft is preferably an angular transmission which can be adjusted between two basic positions which are offset relative to each other by 180, so that the operation of the filling device is not only for the manufacture of powder blanks but also for using the powder press for calibrating the powder blanks.
The filling device according to the present invention has the advantage that, with the exception of the vertical movement of the bracket, all other system axes can be adjusted during operation of the powder press. Another advantage is the fact that the adjustment values can be stored and can be repeated later at any time. During a ~; ~
2 ~ 4 ri ~ ~ 3 .,~
pressing tool change or an adapter change, the filling shoe can be moved by pressing a button from its braking position back into its position of rest on the support plate without losing any powder in the filling shoe or in the powder line.
Other advantages provided by a filling device according to the present invention are:
- ease of operation; -~
- reduction of idle periods;
- increase in production; ~-~
- a uniform operation cycle because interruptions for the adjustment procedures of the filling device are ;~
~ avoided;
.~ :
~ - increased adjustment accuracy; and ,~
- increased repeat accuracy.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had to the drawing and descriptive matter ,, $
in which there is illustrated and described~a preferred embodiment of the invention.
¦ BRIEF DESCRIPTION OF THE DRAWING
In the drawing:
Fig. 1 is a schematic side view of a filling device for automatically filling the die of a powder press;
Fig. 2 is a schematic top view of the filling device of Fig. 1;
Fig. 3 is view, on a large scale and partially in section, of the essential components of the adjusting device for the filling device of Figs. 1 and 2;
, Fig. 4 is a view, on an even larger scale, of the detail IV of the adjustment device of Fig. 3;
,~' , ' ~''' , j , Fig. 5 is a partially sectional view taken along line V-V in Fig. 4; and ,:~
Fig. 6 is a sectional view taken along line VI-VI in Fig. 4.
.
.,~., ~ .,, .. . . " , ..
2 ~ 3 DESCRIPTION OF THE PREFERRED EMBODIMENT
Figs. 1 and 2 of the drawing are a side view and a top view of a device 1 for automatically filling the die 2 of a pressing tool in a powder press.
The filling device 1 interacts through a filling shoe 3 with the die 2 of the pressing tool. The filling shoe 3 is placed on the end face of a die plate 4 and can be moved on ~
this end face over a distance or stroke 5 between a rearward ~;-waiting position and a forward filling position. In Figs. 1 and 2 of the drawing, the rearward waiting position of the shoe 3 is shown in solid lines and the forward filling position of the filling shoe 3 is shown in dash-dot lines.
The filling shoe 3 is in continuous connection through a ~-flexible filling hose 6 with a powder reservoir or silo, not shown, and is supplied from the reservoir or silo continuously with metal powder and/or ceramic powder which is -~
to be compressed in the powder press into blanks.
The filling shoe 3 is pivotally mounted in a stirrup 8 . : .; : ~ ;
through horizontal joints 7. The stirrup 8 forms the front ;`
end of a cantilever arm 9. A joint carrier 10 is provided at or near the rearward end of the cantilever arm 9. A swing lever 11 which is wedged onto the driven shaft of an oscillating cam mechanism 13 acts on the joint carrier 10.
, . . .
The oscillating cam mechanism 13 is of conventional construction and utilizes a cam-controlled mechanism for generating an oscillating drive movement for the swing lever 11 from a uniform drive lever. A rotation of the drive shaft 14 produces an oscillating movement cycle at the driven shaft 12. An end position of the swing lever 11 is shown in Fig. 1 of the drawing in solid lines, while the other end position is partially illustrated in dash-dot lines. The oscillating movement may extend, for example, over an angle of approximately 60. ---The drive shaft of the oscillating cam mechanism 13 isconnected through a universal shaft 15 to an intermediate transmission 16 which, for example, is formed by a miter gear unit and is directly connected to the drive of the powder ~ -press.
The universal shaft 15 which continuously connects the intermediate transmission 16 to the oscillating cam mechanism 13 is constructed so as to be longitudinally adjustable in the known manner and is equipped with two Cardan or universal joints, so that an axial misalignment between the drive shaft 14 of the oscillating cam mechanism 13 and the parallel driven shaft 17 of the intermediate transmission 16 can be compensated without problems.
ri ~
The oscillating cam mechanism 13 which moves the swing lever 11 is mounted on a bracket 18 which, in turn, is supported by a vertical carriage 19 which can be moved vertically adjustably along a stationary guide member 20, for example, on the press frame 21, in accordance with the double arrow 22 in Fig. 1.
The bracket 18 is provided with a horizontally directed guide member 23 which, in turn, supports a cross-slide 24.
The cross-slide has a longitudinal carriage which is movably :;
mounted in the guide member 23 of the bracket 18 parallel to ~.
the plane of movement of the swing lever 11 or the cantilever ~:-arm 9. A transverse carriage 27, in turn, is adjustable in ~.
guide member 26 of the longitudinal carriage 25. The transverse carriage 27 forms the actual support for the -oscillating cam mechanism 13. ~.
:.:
- The cross-slide 24 makes it possible to change the position of the oscillating cam mechanism 13 on the bracket 28 parallel to the plane of movement of the cantilever arm 9 ,~ , and the swing lever 11 as well as in horizontal direction ~ -~
transversely of the plane of movement of cantilever arm 9 and swing lever 11. Thus, the filling shoe 3 can be moved ; .
relative to the die plate 4 in the direction of double arrow .~
28 between a waiting position in which the filling shoe is on ::
the die plate 4 and a position of rest in which the filling ~;.
shoe is completely pulled off from the die plate 4. This `~
.,~, : . ':
2 ~ A r~
displacement in the direction of double arrow 28 takes place without changing the distance or stroke 5 which the filling shoe 3, driven by the swing lever 11 and the cantilever arm 9, has to travel between its waiting position and its filling position.
On the other hand, by displacing the transverse carriage .
27, it is possible, if necessary, to change the alignment of ~ the filling shoe 3 relative to the die 2 or die plate 4 ¦ transversely to its own direction of movement in accordance with the double arrow 29.
The vertical displacement of the bracket 18 by means of vertical carriage 19 along the guide member 20 in the direction of double arrow 22 has the purpose to adjust the vertical position of the filling shoe 3 exactly to different structural heights of the dies 2 arranged in the powder press.
~ ~, : The vertical displacement, the longitudinal displacement I ~ , and the;transverse displacement of the oscillating cam mechanism 13 with swing lever 11 and cantilever arm 9 for the filling shoe 3 is remote controlled through adjustment drives, for example, from the control disk of the powder ~; press by means of an operator guidance and monitor control.
.
~ .3 :
For example, a lifting spindle drive 30 serves as the adjustment drive for the vertical displacement of the bracket 18 in the direction of double arrow 22 by means of the vertical carriage 19 along the guide member 20 or the press frame 21. The lifting spindle drive 30 rests, on the one hand, in a support joint 31 of the guide member 20 for the press frame 21, and, on the other hand, in a connecting joint 32 of the bracket 18. The axes of the support joint 31 and the connecting joints 32 are aligned parallel to the driven shaft 12 of the oscillating shaft mechanism 13.
~ ' The adjustment drive for the longitudinal carriage 25 of ~`
the cross-slide 4, on the other hand, is a screw spindle drive 33 which is mounted on the bracket 18 and engages with its screw spindle 34 in a spindle nut 35 of the longitudinal carriage 25.
A similar screw spindle drive 36 is mounted on the :
longitudinal carriage 25 and interacts with the transverse ~-carriage 27 through its screw spindle 37.
Finally, another adjustment drive 38 can be provided :
which is mounted on the swing lever 11 and acts on the joint carrier 10. This adjustment drive 38 makes it possible to -change the effective length of the swing lever relative to the driven shaft 12 of the oscillating cam mechanism 13. As a .
result, preferably by means of remote control from the ~-~ ~3 ~ 7 3 '~ ~
control desk of the powder press, the length of the distance or stroke 5 of the filling shoe 3 between its waiting position and its filling position can be influenced in an infinitely variable manner.
In order to obtain a proper interaction between the filling device 1 and the die 2 or die plate 4 mounted in the powder press, it is of significant importance that the cantilever arm 9 travels longitudinally movably in a guide joint 40 which is pivotable about an axis 39 which extends parallel to the driven shaft 12 of the oscillating cam mechanism 13 and, thus, to the bearing axis of the swing lever 11. The guide joint 40, in turn, is mounted in a ~:
carrier 41 which travels on a vertical guide member 42 mounted on a cantilever 43 which, in turn, is supported by the oscillating cam mechanism 13. The carrier 41 of the guide joint 40 is acted on by a compressed air or compressed gas cylinder 44 which is subjected to a preferably :
controllable initial pressure and, thus, continuously holds the filling shoe 3 in contact with the end face of the die plate 4. The effective length of the vertical guide member 42 is adjusted to the maximum vertical difference of the die .
2 mounted in the powder press. The stroke of the compressed air or compressed gas cylinder 44 is also adjusted to the maximum respective length of the vertical guide member 42, wherein the filling space of the cylinder 44 is automatically readjusted, so that the adjusted initial pressure is ~ 7y~
maintained, i.e., the filling shoe 3 is always pressed with the same contact force against the end face of the die plate 4.
As Figs. 1 and 2 further show, the bracket 18 has an arm 45 underneath the cantilever 43 mounted on the oscillating ;~
cam mechanism 13. A support plate 46 is mounted on the arm 45 at the same level as the die plate 4. The support plate ;
46 is mounted on the arm 45 so as to be pivotable about a vertically directed bearing 47, so that, if necessary, the support plate 46 can be pivoted immediately closely adjacent to the die plate 4, as shown in dash-dot lines in Figs. 1 and 2. In this case, the support plate 46 may form a support on -which the filling shoe 3 can be moved from its waiting position into a position of rest by means of the longitudinal .~-carriage 25. The filling shoe 3 must be moved into this position of rest when the die 2 or an adapter device including the die 2 has to be changed. The support plate 46 prevents the loss of any metal powder and/or ceramic powder in the filling shoe 3.
.
Flg. 3 of the drawing shows, on a larger scale and partially in section, the operationally important structural components of the adjusting device which operates the filling device 1. As can be seen in Fig. 3, the drive shaft 14 for ~
the oscillating cam mechanism 13 extends through an opening --48 of the bracket 18. The dlmensions of the opening 48 are :.
.
adjusted to the adjusting distance of the longitudinal carriage 25 and the adjusting distance of the transverse carriage 27. The drive shaft 14 also extends through a transverse slot 49 in the longitudinal carriage 25 and a cutout 50 in the transverse carriage 27 of the cross-slide 24, wherein the transverse slot 49 is adjusted in its length to the adjustment distance of the transverse carriage 27.
As Fig. 3 further shows, the intermediate transmission 16 constructed as an angular transmission, for example, a bevel gear unit, includes a shifting device including, for example, a shifting lever 51. This shifting device preferably makes possible a shifting particularly by 180, so that the powder press equipped with the filling device 1 can not only be used for the actual manufacture of blanks from powder material but also makes possible a calibration of such blanks. In the latter case, the filling shoe 3 of the filling device can also be used as a transfer device for the calibrated blanks in the push-off position of the calibrating tool.
! . .
As Fig. 3 additionally shows, clamping cylinders 52 are provided between the vertical carriage 19 and a guide member 20. Clamping cylinders 53 are additionally mounted between the bracket 18 and the longitudinal carriage 25 of the cross-slide 24. Finally, such clamping cylinders 54 are also mounted between the longitudinal carriage 25 and the traverse carriage 27 of the cross-slide 24.
The adjusting drives 30, 33, 36 and 38 are each equipped with incremental sensors which determine the position of the respective carriage and convey the position to the control desk, the monitor and the operator control.
''''~, As Fig. 3 further illustrates, the guiding joint 40 for the cantilever arm 9 is equipped with ball cages 55 in which ;
the cantilever arm 9 travels longitudinally slidably so as to be easily movable at any angular position.
As Fig. 3 further indicates, covers 56 and 57 are arranged in the longitudinal carriage 25 and its guide member 23 as well as the transverse carriage 27 and its guide member 26. These covers 56 and 57 overlap in the manner of scales and are longitudinally displaceable in adjusting direction, in order to protect particularly the screw spindles 34 and 37 of the screw spindle drives 33 and 36.
Fig. 4 of the drawing shows on a larger scale that the cantilever arm 9 in the guiding joint 40 is easily slidably guided by means of two ball cages which are arranged one -after the other. As Figs. 4 and 5 also clearly show, the -~
compressed air or compressed gas cylinder 44 with piston rod 58 acts on the carrier 41 for the guiding joint 40 in the 2 ~ L i ~ ~ ~
middle between two vertical guiding columns of the vertical `
guide member 42 which can be seen in Figs. 5 and 6.
The easy pivoting motion of the guiding joint 40 about its axis 39 in carrier 41 is ensured by pins 60 arranged in alignment with the axis 39 on both sides of the guiding joint 40 which pins 60 are received by roller bearings 61 which are mounted in side walls 62 of the carrier 41. The roller bearing 61 in one wall 62 of the carrier 41 can be a radial ball bearing, while the roller bearing 61 in the other wall 62 of the carrier 41 may be an axial/radial double ball bearing. A particularly easy mobility of the carrier 41 for the guiding joint 40 along the guide column 69 of the vertical guide 42 can be achieved if, in accordance with Fig.
6, two ball cages 63 are also arranged in the side walls 62, wherein the ball cages 63 provide the exact longitudinal guidance.
As can be concluded from Figs. 4 to 6 of the drawing, the supply with compressed air or compressed gas of the compressed air or compressed gas cylinder 44 is provided through one of the guide columns 59 of the vertical guide member 42. For this purpose, at least one of the guide columns 59 is tubular or provided with a bore in the longitudinal direction. A check valve 66 is arranged between the line 65 from the pressure regulator 64 and the lower end i 3 ~ ~
::
,:
of the tubular guide column 59. The locking position of the check valve 66 acts against the line 65 (see Figs. 4 and 5).
As shown in Fig. 5, a connecting line 67 is provided between the upper end of the tubular guide column 59 and the compressed air or compressed gas cylinder 44. As a result of this configuration, the hollow space of the tubular guide column 59 seen in Fig. 6 is in communication as an air or gas reservoir with the compressed air or compressed gas cylinder 44, so that the air or gas volume acting on the cylinder 44 is substantially greater than the volume of the cylinder 44 itself. Accordingly, the compressed air or compressed gas cylinder 44 may have a relatively short structural length, wherein this structural length does not have to be significantly greater than the maximum ad~usting distance traveled by the carrier 41 on the guide member 42. In any case, a sufficiently great air or gas cushion is still -~
available at the cylinder 44 in order to provide the elastic support effect of the cylinder 44 for the carrier 41.
':
, I Finally, it is noted that not only the guide member 20 for the vertical carriage 19 at the press frame, but also the guide members 23 and 26 for the longitudinal carriage 25 and the transverse carriage 27 of the cross-slide 24 are arranged and constructed such that they can be released or loosened by ;~
means of remote controlled clamping cylinders 52, 53 and 54 prior to the actuation of the respective adjusting drive 30 ~ ~ ,L 7 ~
, or 33 or 36. When the adjusting drives 30, 33 and 36 are stopped, the guide members 20, 23 and 26 are also tightened by means of these clamping cylinders.
While a specific embodiment of the invention has been shown and described in detail to illustrate the application of the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.
Claims (12)
1. In a device for automatically filling a die of a powder press with metal or ceramic powder, the powder press having a frame and a drive, the filling device including a filling shoe connected through flexible hoses to a powder reservoir, an adjusting device being coupled to the press drive for moving the filling shoe in work cycles back and forth relative to the die between a waiting position and a filling position by means of a swing lever system and a cantilever arm operating by the swing lever system, the swing lever system having a bearing axis, the improvement comprising the adjusting device including an oscillating cam mechanism for moving the swing lever system, a bracket mounted so as to be movable relative to the press frame by means of adjusting drives in three directions which extend perpendicularly to each other, the oscillating cam mechanism being mounted on the bracket, the oscillating cam mechanism being permanently connected through a longitudinally adjustable universal shaft to an intermediate transmission which is connected to the press drive, the cantilever arm being longitudinally movably guided in a guiding joint, the guiding joint being pivotable about an axis which extends parallel to the bearing axis of the swing lever system, the guiding joint being mounted in a support member, the support member being displaceable along a vertical guide supported by the oscillating cam mechanism.
2. The filling device according to claim 1, wherein the swing lever system for the cantilever arm has an effective length, the effective length being adjustable by means of an adjusting drive.
3. The filling device according to claim 1, wherein the die has an end face, comprising means for placing the support member or the guiding joint relative to the vertical guide under an initial pressure in a direction toward the end face of the die.
4. The filling device according to claim 3, comprising means for adjusting the initial pressure.
5. The filling device according to claim 1, comprising roller bearings for swivelably supporting the guiding joint in the support member, the support member including ball cages for traveling on the vertical guide, and the guiding joint including ball cages for receiving the cantilever arm.
6. The filling device according to claim 1, comprising a compressed air or compressed gas cylinder mounted on the vertical guide for acting on the support member of the guiding joint.
7. The filling device according to claim 1, comprising remote control means for the adjusting drives for moving the bracket, one of the adjusting drives for the bracket acting on a vertical carriage mounted so as to be movable in straight-line guides, the vertical carriage supporting a horizontal cross-slide mounted so as to be movable in straight-line guides, the cross-slide including a longitudinal carriage actuated by one of the adjusting drives and a transverse carriage actuated by another of the adjusting drive.
8. The filling device according to claim 7, wherein the remote control means include a central control desk with monitor and operator control.
9. The filling device according to claim 7, comprising an incremental sensor for the adjusting drive acting on the vertical carriage, and an incremental sensor each for the adjusting drives acting on the cross-slide.
10. The filling device according to claim 7, wherein the straight-line guides for the vertical carriage and the cross-slide include clamping devices, comprising means for loosening the clamping devices by remote control when the adjusting drives are actuated and for tightening the clamping devices by remote control when the adjusting drives are stopped.
11. The filling device according to claim 1, wherein the die includes a die plate, the bracket supporting an arm which is pivotable about a vertical axis, a support plate being mounted on the pivotable arm, the support plate being located in the same plane as the die plate, wherein, when the support plate is pivoted against the die plate, the support plate forms a support means on which the filling shoe can be moved from the waiting position into a position of rest.
12. The filling device according to claim 7, wherein the adjusting drive for the vertical carriage is a lifting spindle drive, and wherein the adjusting drives for the cross-slide are screw spindle drives.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19893916951 DE3916951A1 (en) | 1989-05-24 | 1989-05-24 | FILLING DEVICE FOR AUTOMATICALLY FILLING THE MATRIX OF POWDER PRESSES |
| DEP3916951.0 | 1989-05-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2017343A1 true CA2017343A1 (en) | 1990-11-24 |
Family
ID=6381333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2017343 Abandoned CA2017343A1 (en) | 1989-05-24 | 1990-05-23 | Device for automatically filling the die of a powder press |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0399281A3 (en) |
| JP (1) | JPH0342197A (en) |
| CA (1) | CA2017343A1 (en) |
| DE (1) | DE3916951A1 (en) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0180557B1 (en) * | 1990-12-26 | 1999-03-20 | 후까이 히로도시 | Brick press |
| FR2676678A1 (en) * | 1991-05-24 | 1992-11-27 | Balbinot Ets | DEVICE FOR SUPPORTING AND ADJUSTING THE DRAWER HEIGHT OF A CONCRETE MOLDING MACHINE. |
| US5213816A (en) * | 1991-05-31 | 1993-05-25 | Cincinnati Incorporated | Polymer coated powder heating and feeding system for a compacting press |
| IT1251313B (en) * | 1991-09-13 | 1995-05-08 | Siti Spa | DEVICE FOR LOADING THE PRESSED POWDER AND PRESSING APPARATUS |
| CH684179A5 (en) * | 1991-09-14 | 1994-07-29 | Laeis & Bucher Gmbh | Press for linear compression and method for its operation. |
| JPH0631491A (en) * | 1992-07-17 | 1994-02-08 | Fanuc Ltd | Powder molding machine |
| DE19502841A1 (en) * | 1995-01-30 | 1996-08-01 | Dorst Masch & Anlagen | Powder press with mechanical and hydraulic transmission |
| DE19851527A1 (en) * | 1998-11-09 | 2000-05-11 | Dorst Masch & Anlagen | Filling device for axial powder presses |
| DE29908594U1 (en) * | 1999-05-14 | 1999-11-04 | Propharm Apotheker Koch Gmbh | Device for the production of compacts |
| IT1310965B1 (en) * | 1999-08-02 | 2002-02-27 | Lb Officine Meccaniche Spa | EQUIPMENT FOR LOADING THE MATERIAL IN THE CAVITY OF THE AMATEUR OF A MOLD, IN PARTICULAR, FOR PRESSING TILES |
| CN102173096B (en) * | 2010-12-24 | 2013-11-13 | 严培义 | Filling travel adjusting device for powder forming machine |
| CN102173095A (en) * | 2011-03-11 | 2011-09-07 | 合肥合锻机床股份有限公司 | Hydraulic machine and hydraulic execution device thereof |
| CN103639410B (en) * | 2013-11-28 | 2015-07-01 | 山西中泰源工业自动化设备有限公司 | Mould arrangement worktable for robot system formed by die-casting magnetic materials |
| CN106141174B (en) * | 2016-08-19 | 2018-01-12 | 十堰同创传动技术有限公司 | Duster |
| CN109664544B (en) * | 2018-11-15 | 2020-07-10 | 北京科技大学 | Automatic pressing device for powder materials |
| CN109514697B (en) * | 2018-11-26 | 2021-06-25 | 怀化市嘉星陶艺文化科技有限公司 | Single-arm adjustable rolling ceramic forming machine and using method thereof |
| CN109550944B (en) * | 2018-12-07 | 2024-04-12 | 无锡富乙特智能装备有限公司 | Vertical manipulator arranging machine |
| CN110524683B (en) * | 2019-07-03 | 2020-10-13 | 泰州市姜堰区新宇建材有限公司 | Building concrete brick forming device with function is emptyd in upset |
| CN110947957A (en) * | 2019-11-29 | 2020-04-03 | 张家港振江粉末冶金制品有限公司 | Powder metallurgy pressing equipment convenient to maintain |
| CN115179494B (en) * | 2022-07-07 | 2023-05-19 | 南通理工学院 | Injection molding machine feeding device with automatic material mixing function and feeding method |
| CN114871428B (en) * | 2022-07-07 | 2022-09-23 | 徐州威德金属制品有限公司 | Quantitative feeding device for metal powder processing |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE339082B (en) * | 1968-10-02 | 1971-09-27 | Mannesmann Meer Ag | |
| US4327996A (en) * | 1980-09-02 | 1982-05-04 | Cts Corporation | Apparatus for controlling the movement of press components |
| JPS5884700A (en) * | 1981-11-16 | 1983-05-20 | Yoshitsuka Seiki:Kk | Powder feeder in powder molding press |
| JPS59212197A (en) * | 1983-05-18 | 1984-12-01 | Yoshitsuka Seiki:Kk | Powder molding press |
| JPS6160296A (en) * | 1984-08-30 | 1986-03-27 | Yoshitsuka Seiki:Kk | Automatic powder molding press |
| CH671184A5 (en) * | 1986-11-19 | 1989-08-15 | Bucher Guyer Ag Masch |
-
1989
- 1989-05-24 DE DE19893916951 patent/DE3916951A1/en not_active Withdrawn
-
1990
- 1990-05-08 EP EP19900108622 patent/EP0399281A3/en not_active Withdrawn
- 1990-05-23 CA CA 2017343 patent/CA2017343A1/en not_active Abandoned
- 1990-05-23 JP JP13369490A patent/JPH0342197A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0342197A (en) | 1991-02-22 |
| EP0399281A3 (en) | 1991-10-02 |
| DE3916951A1 (en) | 1990-11-29 |
| EP0399281A2 (en) | 1990-11-28 |
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