EP2555887B1 - Tool unit of a rotary kneading machine - Google Patents

Description

The invention relates to a tool unit of a rotary swaging machine with a tool room, in which a plurality of Umformknetwerkzeuge for processing a insertable into the tool room workpiece are provided, and with a front cover, by means of which the tool room from a tool room side is at least partially covered, wherein the front cover for changing Umformknetwerkzeugen in at least one position is convertible, in which the front cover releases the tool room for removal or insertion of Umformknetwerkzeugen from the tool room side, and wherein provided with an actuator front cover latch is provided by means of which the front cover is locked in a position in which the front cover at least partially covers the tool room from the side of the tool room.

Generally, by means of a rotary swaging z. B. rods or tubes with reduction of the cross section of at least one workpiece longitudinal section formed. For this purpose, a rotary swaging machine has a tool unit with a working space in which at least two Forming tools are provided. The forming tools are designed such that they can completely or partially enclose the workpiece longitudinal section to be machined. By means of a Umformantriebs the forming tools are moved radially to the workpiece. There are different types of Umformantrieben known for rotary kneading machines. By way of example, hydraulic forming drives or electromotive ring drive drives can be mentioned.

The forming tools must be specially adapted to different forming operations. Therefore, the forming tools must be replaced usually between different workpiece machining.

In conventional rotary swaging the tool change is relatively expensive. In order to remove the forming tools from the tool room and insert other forming tools into the tool room, a front cover in the form of a front panel must be removed from a side of the tool room. The front panel is bolted to a component surrounding the tool room, usually the so-called jaw guide, by means of a plurality of fastening screws. To be able to remove the front panel from the tool room side, an operator must therefore first the individual mounting screws, z. B. by means of a wrench or the like, unscrew. This process is relatively tedious and time consuming.

Generic prior art is known from EP 0 411 300 A2 as well as out DE 40 02 855 C1 , These documents each disclose a rotary swaging machine whose tool space is closed by a motor-displaced front cover. According to EP 0 411 300 A2 can the front cover is pivoted about a pivot axis perpendicular to the front cover by means of a pivoting segment and a rotary segment driving the pivoting segment. As a result, the front cover can be moved to a position in which it closes the tool room of the previously known rotary swaging machine or into a position in which it allows access to the tool room. evidenced DE 40 02 855 C1 the front cover of the tool room of a rotary swaging machine is raised by means of a lifting cylinder in an open position or lowered into a closed position.

Based on the generic state of the art, the invention has set itself the goal of providing a tool unit, which is characterized by a particularly handling-friendly change of Umformknetwerkzeuge.

According to the invention, this object is achieved by the tool unit according to claim 1.

In the case of the invention, the front cover is slidably mounted both by means of a front cover guide relative to the tool room side and at the same time mounted pivotably relative to the tool room side by means of a front cover pivot bearing.

Due to the sliding support of the front cover guide, the operator does not have to carry the front cover when removing the front cover from the tool room side. The front cover is rather supported on the front cover guide and can be easily pushed away from the tool room side. In this case, the transfer movement of the front cover relative to the tool room side In addition, the advantage that in the case of a front cover through which, for example, adjusting wedges protrude from the workpiece space beyond the workpiece space side, the front cover can be deducted by the transfer movement at the same time also from the Einstellkeilen. Then the front cover can be swung freely to the side to allow free access to the tool room.

In particular, it is advantageous that the pivot axis of the front cover pivot bearing extends parallel to the plane of the tool room side. The front cover can be swung away in the manner of a flap from the tool room side. Again, the operator may not need to wear the front cover when removing from the tool room side.

The inventive storage and management of the front cover when removing from the tool room side is particularly advantageous in a tool unit, in which the forming tools come in the workpiece machining on the front cover to the plant. For example, due to adjusting wedges or the like, the forming tool in this case are pressed axially onto the front cover with relatively high forces. Consequently, the front cover must be extremely stable and thus heavy. Thanks to the guidance or storage of the front cover, the relatively heavy front cover does not need to be worn by the operator.

A particularly pleasant handling results when the front cover during the transfer movement and / or the pivoting movement by means of a drive or by means of drives can be driven. For example, you can hydraulic, pneumatic, electrical, etc. actuators are used.

By means of the front cover lock, the front cover can be locked in a position in which the front cover at least partially covers the tool space on the part of the workpiece side. Therefore, an operator does not have to laboriously for changing the forming tools z. B. loosen a screw of the front cover using additional tools. He just has to unlock the front cover lock by means of the actuator or lock after the tool change.

There are various types of front cover locks conceivable. Preferably, the front cover latch has one or more locking elements, which are movable by means of the actuating device substantially by a pivoting and / or a linear movement between a release position and a locking position. In the locking position, the front cover is fixed to the tool room side by z. B. forms a rear grip between frontabdeckungs- and tool room side elements. It can be used locking elements in the form of rods, bolts, plates, balls, etc.

Advantageous embodiments of the tool unit according to claim 1 emerge from the claims 2 to 9.

Preferably, the actuator of the front cover latch may comprise a drive by means of which the front cover latch for locking and unlocking the front cover driven is. To name a few are hydraulic and pneumatic actuating cylinders, by means of which at least one locking element between a release position and a locking position can be moved back and forth. Furthermore, can serve as a drive and an electric actuator.

Alternatively, the actuator of the front cover latch is adapted to be manually operated by an operator. In particular, the actuating device for this purpose with a handle element, for. B. a handle or the like provided. To release and close the front cover latch, an operator only needs to grasp the handle and operate accordingly. This results in a compact and cost-effective variant of a front cover lock, which can be actuated without the use of additional tools.

A particularly compact design of a tool unit according to the invention results from the fact that the actuator of the front cover latch is attached to the front cover. The actuator and the front cover thus form a compact front cover unit. On the side of the tool room in this way no special mechanisms for operating the front cover latch, etc. must be accommodated.

In this sense, it is of particular advantage if a handle for actuating the front cover latch on the front cover is provided and in particular is not attached to components on the side of the tool room.

In the case of the tool unit according to the invention, the front cover is provided in particular with a passage for introducing a workpiece section to be machined into the tool room. In addition, the front cover may be provided with further passage openings through which, for example, adjusting wedges for setting the stroke position of the Umformknetwerkzeuge may protrude beyond the tool room side. Preferably, a cover surrounding the adjusting wedges is provided on the front cover, via which a handle for actuating the front cover locking protrudes.

Of particular advantage is an embodiment of the invention, wherein the locking element of the front cover latch for locking and unlocking the front cover is movably mounted on the front cover. Also in this case, a compact front cover unit results from the front cover and the front cover lock. Additional locking mechanisms or the like on the part surrounding the tool room components are largely unnecessary.

Preferably, the front cover lock on a locking element which is pivotally mounted for locking and unlocking the front cover and rotatable. It is particularly space-saving, if the locking element to a perpendicular to the tool room side pivot axis, d. H. in particular perpendicular to the plane of the front cover, is pivotally mounted.

To release the front cover latch, z. B. by vibrations in the workpiece processing, to prevent the front cover latch can be clamped in a locking position by means of a clamping device. For example, the front cover latch Bayonettverschlussartig (automatically) when locking clamped or jammed. A disadvantage of this variant is that such a front cover lock is relatively stiff.

By a high reliability and at the same time a smooth operation of the front cover lock, a particularly preferred embodiment of the invention is characterized in which the front cover latch has a self-actuated clamping device, to secure the front cover latch in a locked position. Preferably, the clamping device has driven clamping means, for. B. hydraulic clamping cylinder. The clamping force does not have to be applied by the operator in this case. The operator can activate the clamping device by actuating a switching element or the like, for example, after locking.

A particularly robust and proven in practice embodiment of the invention results in that the front cover latch has at least one bolt which is fixed to a component surrounding the tool space, in particular the so-called jaw guide. The bolt represents a particularly robust fastening or locking element. In this case, the bolt is arranged such that it protrudes through a passage opening on the front cover, when it covers the tool space on the part of the tool room at least partially. Furthermore, in the case of the preferred embodiment of the invention, the front cover locking device has a locking plate which likewise has at least one passage opening through which the bolt head can protrude. The locking plate is movable relative to the bolt between a release position and a locking position. In the locking position, the locking plate engages behind the protruding bolt head.

In a particularly compact design of the invention, the locking plate and the front cover are integrally formed. In this variant, the front cover itself is pivoted or rotated to be locked or unlocked. Alternatively, however, the locking plate is movably mounted as a separate component on the front cover between the release position and the locking position. advantageously, In this case, the front cover itself must not be designed to be rotatable or pivotable.

Figur 1:

eine Rundknetmaschine in einer perspektivischen Darstellung,

Figur 2:

eine Werkzeugeinheit der Rundknetmaschine aus Figur 1, wobei eine Abdeckhaube entfernt ist und

Figur 3:

einen Teil der Werkzeugeinheit in einer Schnittdarstellung.

The invention will be explained in more detail below with reference to exemplary schematic illustrations. Show it:

FIG. 1:

a rotary swaging machine in a perspective view,

FIG. 2:

a tool unit of the rotary swaging machine FIG. 1 , wherein a cover is removed and

FIG. 3:

a part of the tool unit in a sectional view.

FIG. 1 shows a rotary swaging machine 1 with a tool unit 2 and only partially shown workpiece feed unit 3. By means of the workpiece feed unit 3, a clamped on a collet 4 workpiece 5, z. B. a pipe, along a feed axis 6 and working axis of the tool unit 2 are supplied. The insertion axis 6 coincides with a longitudinal axis of the clamped workpiece 5. Via an insertion opening 7 on a front side 8 of the tool unit 2, the clamped workpiece 5 can be introduced with a workpiece longitudinal section to be machined into a tool space 9 of the tool unit 2.

In FIG. 2 the tool unit 2 of the rotary swaging machine 1 is shown in isolation. The tool unit 2 has a front cover unit 11, wherein an in FIG. 1 shown cover 12 of the front cover unit 11 is not shown, so that arranged underneath components of the front cover unit 11 can be seen better.

The front cover unit 11 has a front cover which is formed as a circular front plate 13. The front panel 13 covers the tool room 9 from a tool room side 14 at least partially. It has a circular passage 15 for insertion of a workpiece 5 in the tool room 9. In addition, the front plate 13 is provided with further elongated passage openings 16 through which adjusting wedges (not shown) can protrude from the tool room 9 through the front panel 13 therethrough.

Furthermore, a front cover lock 20 is provided, by means of which the front panel 13 can be locked in the position shown. The front cover latch 20 has a locking element in the form of an annular locking plate 21. The locking plate 21 lies flat against the side facing away from the tool room 9 side of the front panel 13. To lock it cooperates with four locking pin 22. The locking bolts 22 protrude through keyhole-shaped recesses 23 of the locking plate 21. The keyhole-shaped recesses 23 each have a portion with a diameter corresponding to at least the largest diameter of the bolt heads 24. In addition, they each have a section with a much smaller diameter. Due to the projecting through the keyhole-shaped recesses 23 locking pin 22, the locking plate 21 is pivotally mounted about the insertion axis 6 on the front panel 13.

An actuator 26 of the front cover latch 20 has a handle in the form of an actuating lever 27. The operating lever 27 is fixed to a support ring 28, which in turn is fixedly connected to the locking plate 21.

The front panel 13 is fixed to a C-shaped support arm 29. The support arm 29 engages around a bearing carriage 30 and is pivotally connected thereto via a pivot bearing 31 about a pivot axis 32. The pivot axis 32 extends parallel to the plane of the covered by the front panel 13 tool room side 14 and parallel to the plane of the front panel thirteenth

The bearing carriage 30 is arranged displaceably along a displacement axis 33 on a guide rod 34 passing through the bearing carriage 30, which is fastened to the front side 8 of the tool unit 2. The displacement axis 33 is perpendicular to the plane of the covered by the front panel 13 tool room side 14 and perpendicular to the plane of the front panel 13. The bearing carriage 30 is provided with a further handle in the form of a hand lever 35. The bearing carriage 30 and the guide rod 34 form a front cover guide 36 for the front panel 13th

An interrogation device 40 for locking interrogation is likewise fastened to the front side 8 of the tool unit 2. The interrogator 40 has a shift sensor 41 and a shift lever 42. The shift lever 42 is fixed to the support ring 28. Its position is therefore determined by the rotational position of the support ring 28 about the insertion axis 6. In the illustrated rotational position of the support ring 28 (locking position) contacted the shift lever 42, the shift sensor 41. In this way, it can be checked whether the front cover latch 20 is locked.

In FIG. 3 a part of the tool unit 2 is shown in a sectional view along a vertical sectional plane in which the insertion axis 6 extends.

According to FIG. 3 the tool space 9 is surrounded by a jaw guide 45, on which the forming tools are mounted radially displaceable. By means of sliding along the insertion axis 6 adjusting wedges, the radial stroke position of the forming tools can be adjusted. The forming tools come in the workpiece machining on the front panel 13 to the system and act on these due to the deflection of the radial forming force by adjusting wedges with considerable axial forces. Both the forming tools and the adjusting wedges are in FIG. 3 but not shown.

The drive for the forming tools is designed as a conventional outer rotor ring drive. A roller cage 47 equipped with pressure rollers 46 surrounds the jaw guide 45 centrally about the insertion axis 6. The roller cage 47 is in turn surrounded by a motor-driven external rotor ring 48. The insertion axis 6 consequently also forms a working axis of the tool unit 2.

evidenced FIG. 3 the locking pins 22 are screwed into the jaw guide 45. They protrude through cylindrical recesses 49 of the front panel 13 through the front panel 13 therethrough. The bolt heads 24 are undercut with a circumferential groove 50. In the illustrated position of the locking plate 21 which are undercut with the circumferential groove 50 Bolt heads 24 arranged in the portion of the keyhole-shaped recesses 23 on the locking plate 21, which has the smaller diameter, namely just a diameter corresponding to the diameter of the locking pin 22 in the region of the circumferential groove 50 has. The locking plate 21 thus engages behind the bolt heads 24. Due to the rear grip of the locking plate 21, the flat on the locking plate 21 adjacent front panel 13 can not be removed from the tool room side 14 in the direction of the insertion axis 6 in this position of the locking plate 21 (in FIG. 3 to the left). The locking plate 21 thus assumes a locking position.

Furthermore, four, hydraulically operated clamping cylinders 51 are provided on the side facing the tool space 9 side of the front plate 13, which are distributed uniformly around the insertion axis 6. In FIG. 3 two of the clamping cylinders 51 are shown. The clamping cylinders 51 are part of the clamping device 53 for securing the front cover lock 20. When the clamping cylinder 51 are activated, the front plate 13 is pushed away from the jaw guide 45 by this. As a result, at the same time the locking plate 21 is pressed onto the undercut bolt heads 24. The locking plate 21 is secured in this manner in the locked position against loosening.

The activation and deactivation of the clamping cylinder 51 by means of a switching valve, not shown. Alternatively, the clamping cylinder 51 z. B. also be arranged such that through them the locking plate 21 is pressed away from the front panel 13, on the bolt heads 24.

Incidentally, below the front cover unit 11 on the front side 8 of the tool unit 2, there is provided a support plate 52 for fixing a cooling lubricant return pipe (not shown).

In the following, a sequence of a tool change on the tool unit 2 will be described by way of example, starting from the ratios shown in the figures. According to the FIGS. 1 to 3 the locking plate 21 is arranged in a locking position and secured in this position by means of the clamping device 42. In order to remove the front panel 13 from the tool room side 14, an operator must first deactivate the clamping cylinders 51 by operating the switching valve, not shown. To release the front cover latch 20 can now be the left operating lever 27 by an operator in FIG. 2 to be moved down. As a result, a pivoting movement of the locking plate 21 about the insertion axis 6 is effected. The undercut bolt heads 24 are now arranged in the keyhole-shaped recesses 23 in the sections which have a diameter which corresponds to the diameter of the bolt heads 24. The locking plate 21 is arranged in a release position. The front panel 13 is thus unlocked.

An operator can now grasp both hand levers 27, 35 of the front cover unit 11 and move the entire front cover unit 11 along the guide rod 34 to the front, ie away from the tool room side 14. The locking bolts 22 are led out of the recesses 49 of the front panel 13. At the same time, the front cover unit 11 can be deducted from adjusting wedges by this linear movement, which project through the openings 16 through the front panel 13.

After the front panel 13 has been withdrawn by the linear movement from the tool room side 14, an operator can pivot the front cover unit 11 about the pivot axis 32. The tool room 9 is now released for a tool change. In addition, by removing the front plate 13, the adjusting wedges, so-called base jaws, the pressure rollers 46 of the roller cage 47, etc. exposed for a change or maintenance.

After the tool change the front cover unit 11 is again applied in the reverse order to the tool room side 14 and locked at this. There is a query of the locking state of the front cover lock 20 by means of the interrogator 40 and finally the clamping device 53 of the front cover latch 20 is activated.

Claims (9)

1. Tool unit of a rotary swaging machine (1) having a tool space (9) in which a plurality of shaping swaging tools for processing a workpiece (5) which can be introduced into the tool space (9) are provided, and having a front cover (13), by means of which the tool space (9) at the side of a tool space side (14) can be at least partially covered, the front cover (13), in order to change shaping swaging tools, being able to be moved into at least one position in which the front cover (13) releases the tool space (9) in order to remove or to insert shaping swaging tools at the side of the tool space side (14), and there being provided a front cover lock (20) which is provided with an actuation device (26) by means of which the front cover (13) can be locked in a position in which the front cover (13) at least partially covers the tool space (9) at the side of the tool space side (14),
   characterised in that

   • the front cover (13) is supported so as to be able to be displaced in a front cover guide (36) away from the tool space side (14) or towards the tool space side (14), there preferably being provided a drive by means of which the front cover (13) can be driven along the front cover guide (36) during a displacement movement and

   • in that the front cover (13) is supported so as to be able to be pivoted by means of a front cover pivot bearing (31) with respect to the tool space side (14) about a pivot axis (32) which extends parallel with the plane of the tool space side (14), there preferably being provided a drive by means of which the front cover (13) can be driven about the front cover pivot bearing (31) during a pivot movement.
2. Tool unit according to claim 1, characterised in that the actuation device (26) of the front cover lock (20) has a drive by means of which the front cover lock (20) can be driven in order to lock and unlock the front cover (13).
3. Tool unit according to claim 1, characterised in that the front cover lock (20) can be operated manually by an operator by means of the actuation device (26).
4. Tool unit according to any one of the preceding claims, characterised in that the actuation device (26) of the front cover lock (20) is secured to the front cover (13).
5. Tool unit according to any one of the preceding claims, characterised in that the actuation device (26) has a handle (27) which is provided on the front cover (13).
6. Tool unit according to any one of the preceding claims, characterised in that the front cover lock (20) has a locking element (21) which is movably supported by the front cover (13) in order to lock and unlock the front cover (13).
7. Tool unit according to any one of the preceding claims, characterised in that the front cover lock (20) has a locking element (21) which is pivotably supported in order to lock and unlock the front cover (13), in particular about a pivot axis (6) which extends transversely relative to the tool space side (14).
8. Tool unit according to any one of the preceding claims, characterised in that the front cover lock (20) has a clamping device (53) in order to secure the front cover lock (20) in a locking position.
9. Tool unit according to any one of the preceding claims, characterised in that the front cover lock (20) has at least one bolt (22) which is secured to a component (45) which surrounds the tool space (9) in such a manner that the bolt (22) protrudes with an undercut bolt head (24) beyond the front cover (13) when the front cover (13) at least partially covers the tool space (9) at the side of the tool space side (14), in that the front cover lock (20) has a locking plate (21) which is provided with at least one through-opening (23), through which the bolt head (24) can protrude, and in that the locking plate (21) in order to lock the front cover (13) can be moved relative to the bolt (22) into a locking position in which the locking plate (21) engages behind the bolt head (24) protruding through the through-opening (23).

Images