DE19511002A1 - Machine for cutting annular objects - Google Patents

Abstract

The actuating component (5) of the machine is attached on a framework (4a, 4b) which bears upon a number of struts (3) which in turn are supported on a pedestal (2). The actuating component can be pushed out of and drawn back into the framework in a direction upwards and away from the designated annular object (T). A number of cutting blades (6) are attached on the forward end of the actuating component opposite circumferential sections of the annular object.

Description

The present invention relates to a Cutting machine for cutting an annular Ge such as a tire or an electric cable which is wound in the form of a ring, and esp special to a cutting machine of the type that one Has mounting bracket, which is arranged on a base is the circular counter to be cut on it stood firmly attached, an actuator that on the ring-shaped object that is firmly on the loading Fixing bracket is attached to and away from this is moved, the actuating unit on a Frame structure is attached, which getra by struts who is carried vertically on a pedestal den, and a variety of cutting blades on one are attached to the front end of the actuation unit, around a variety of peripheral portions of the fixed brought annular object to face so that with forward movement of the cutting sound together with the actuator against the fixed annular object, the annular Subject at its multitude of extensive ab cut is cut.

According to the known cutting machine of the above benen type, the actuator unit comprises a single  Large diameter operating rod and a variety of cutting blades, all stuck to the front end of the single rod are attached. To a ringför subject to a variety of extensive ab cut from it, the rod is cut using of a hydraulic cylinder powered to get out push the frame structure out towards the ring-shaped object to and against it, so that the multitude of cutting blades that are firmly in their buttocks sition are held, the annular object press and cut.

According to the conventional construction described above but becomes the ring-shaped object in its multitude of extensive sections by means of the press cutting forces cut by the variety of cutting sound is transmitted, which is held firmly in place become. So the cutting process requires a considerable one Amount of strength. This results in an enlargement of the hydraulic cylinder and others connected to it those components so that one tends to the machine to enlarge.

The present invention proceeds from that described above State of the art and its essential task is a cutting machine for ring shaped Ge to provide objects that address the problems of the state of the Technology can solve and the overall compact construction wise.

In order to solve the aforementioned task, one Cutting machine for cutting ring-shaped counter According to the present invention:

• - a base;
• - A mounting bracket, which is arranged on the base is to cut the ring-shaped to be cut on it Attach object firmly;
• - a frame structure that is characterized by a variety of Braces are carried, which in turn are supported by the base be worn;
• - An actuator unit attached to the frame structure is attached to the annular object and to be moved away from that who is firmly on the Mounting bracket is attached;
• - a variety of cutting blades attached to the front End of the actuator unit against a variety of peripheral portions of the annular counter Standes are attached, so that with a forward directed movement of the cutting blades together with the actuator of the annular object a plurality of circumferential sections thereof will cut;
• - wherein said operating unit at least one Has pair of operating rods to each of the be said cutting blades regardless of the frame structure door to and from the annular object move away, said operating rods support each of the cutting blades mentioned, to enable the cutting blade to be to swivel the object to and from it;
• - Switching means to optionally select a first mode see where the front ends of said pair of actuating rods to the annular counter stood at essentially the same speed speed, or a second mode in which  one of said actuation rods held still while the other operating rod is facing the may approach annular object;
• - Pressure sensor means to determine a cutting pressure len, which is applied to the cutting blades mentioned becomes; and
• - A control device to switch said control means based on the cutting pressure in said pressure sensor means a way is determined that said Um switch means provide said first mode if the determined cutting pressure is less than one predetermined value, and said switching means provide the second mode if the determined Cutting pressure is higher than the predetermined one Value.

With the construction described above according to the present The invention can be the annular object a plurality of extensive portions thereof in be cut up in a way that next is to describe.

First, the ring-shaped object is firmly on the Be fastening bracket set. At an initial start the cutting machine is not cutting pressure applied to the cutting blades. Based on the findings by the pressure sensor means that the determined cutting pressure (cutting pressure is zero) is lower than the specified value, causes the Control device therefore the switching means provide the first mode so that the front ends of the two actuating rods are attached to the stuck ring  may approach the shaped object. During the cutting sound in contact with the ring-shaped object men and cutting into it progressively increases the cutting pressure above the given value, which increased pressure detected by the pressure sensor means becomes. Then, based on that finding by the Pressure sensor means, causes the control device the switching means to provide the second mode so that one of the poles is stopped and only that lead de end of the other rod towards the ringför Migen object may move so that the cutting blade is pivoted about a connection end thereof, which at the stationary rod is attached like the lever assembly voltage, so as to cut the ring-shaped object to accomplish.

With the design described above, in which the Cutting blade pivoted about a connector end thereof to cut the ring-shaped object the ring-shaped object because of the pulling cutting effect in combination with the lever effect with a smaller force than the previous one described conventional design is needed at which is the object by a cutting blade that is in is held in a fixed position, press cut becomes.

The actuating rods require lower forces and consequently, the performance requirements of the Actuator to drive these rods small his. If further the cutting blade in its Length is extended and the confirmation bars with this cutting blade with a maximum longitudinal distance  attached in between, the lever effect can ver be strengthened to have a greater cutting force on the to apply annular object.

If a ring-shaped object with a large diameter that requires a greater amount of cutting force to cut, this can be done by simply ver the length of the cutting blades accordingly enlarged without being a stronger drive unit use.

Accordingly, with the construction of the present invention a ring-shaped object can be cut with a smaller force and a less strong pressure tigunseinheit can be sufficient to the actuating stand gene to drive, so that the entire machines for Cutting a ring-shaped object more compactly can be trained.

Other objects, features and effects of the invention become clearer from the following more detailed Description of the embodiments of the invention at Reference to the accompanying drawings.

The accompanying drawings illustrate preferred embodiments Forms of a machine for cutting a ring conveyor The subject of the present invention represents.

Figure 1 is a partially broken front view of a machine for cutting an annular Ge object according to a preferred embodiment.

Fig. 2 is a partially broken front view showing a state in which the cutting blades touch an annular object;

Fig. 3 is a partially broken front view showing another state in which the cutting blades are pivoted to cut the ring-shaped object;

Fig. 4 is a perspective view of the ring-shaped object cutting machine;

Fig. 5 is a view illustrating a control mechanism of the machine;

Fig. 6 is a front view according shows a machine for cutting a ring-shaped object of a further embodiment of the invention, and

Fig. 7 is a front view showing an annular object cutting machine according to still another embodiment of the invention.

Preferred embodiments of the present invention are with reference to the accompanying drawings Now described in more detail.

In a machine for cutting an annular object according to a first embodiment as shown in FIG. 4, a mounting bracket 1 is mounted on a base 2 to firmly mount a used tire TEN as an example of one intersecting annular object. Three struts 3 , which are supported vertically on the base 2 , in turn carry substantially circular first and second frames 4 a, 4 b, on which an actuating unit 5 is installed, which can be moved to and from the used tire T , which is firmly attached to the mounting bracket 1 . The operating unit carries at its front ends a plurality of Schneidklin gene 6 , which are arranged equidistantly around the circumference of the tire T. These are the main components of the cutting machine.

The first and the second frame 4 a, 4 b are arranged parallel to each other with a vertical distance between them. The first frame 4 a is fastened to the struts 3 be, while the second frame 4 b is vertically displaceable relative to these.

The mounting bracket 1 includes a substantially ko African tire mounting part 1 a, which is attached to the base 2 to allow the tire to hang up on the side facing away from the cutting blades 6 . The conical shape of the tire mounting part 1 a allows the placement and cutting of tires of different diameters (a large tire, a small tire or the like).

Next, the operating unit 5 will be described in detail. This actuation unit 5 includes a first actuator rod 7 a, of the first frame 4 a pushed out and retractable is rods towards and away from the fixedly mounted tire T by means of a first hydraulic cylinder S1, and four second actuator 7b, which is the first actuating rod 7 a are arranged around so that they can be pushed out and retracted from the second frame 4 b in the direction and away from the tire T via four corresponding second cylinders of the S2. The four cutting blades 4 are radially angeord net around the front end of the first operating rod 7 a. Because the opposite longitudinal ends. Each cutting blade 6 is pivotally attached to the front end of the first actuation rod 7 a or on which the two th actuation rod 7 b, the cutting blades 6 are connected to the first and second confirmation rods 7 a, 7 b, to be pivotally advanced and to be drafted. The pivotable connection between the front end of the second actuating rods 7 b and the cutting blade 6 is realized by means of a longitudinal slot which is formed along the length of the cutting blade 6 . In addition, the first operating rod 7 a with the second frame 4 b is firmly connected, so that this first rod 7 a is driven together with the second frame 4 b to advance and retract with respect to the tire T.

For the first hydraulic cylinder S1 and the second hydraulic cylinder S2, switching valves V are provided as switchover means, in order to optionally provide a first mode, which is shown in FIGS. 1 and 2, in which the front ends of both the first and the second actuating rods 7 a, 7 b are allowed to move at essentially the same speed onto the tire T (ie, only the first hydraulic cylinder S1 is actuated to cause the first actuating rod 7 a to slide out of the first frame 4 a, so that the second frame 4 b is slipped away from the first frame 4 a to enable the cutting blades 6 to approach the tire T, with the blades held in their orientation) and a second mode, which is shown in FIG. 3, in which the first operating rod 7 a is held still, while only the front ends of the second operating rods 7 b are allowed to approach the tire T (ie only the second hydraulic ones Cylinder S2 are operated to the two th actuation rods 7 to cause b, to b forth to push out the second frame 4, so that the cutting blades 6 around the front end of the first actuating rod 7 a pivoted toward the tire T). See Fig. 5.

As shown in Fig. 5, a pressure sensor 8 is also provided as a pressure sensor means to determine a cutting pressure applied to the cutting blades 6 . In operation, a control device 9 switches the switching valves V to provide the first mode based on the pressure measurement by this pressure sensor 8 when the detected cutting pressure is lower than a predetermined value to provide the first mode. On the other hand, when the detected cutting pressure is higher than the predetermined value, the control device 9 switches the switching valves V to provide the second mode.

The control operations performed by this control device 9 will next be described in more detail.

In the initial travel state of the cutting machine, no cutting pressure is exerted on the cutting blades 6 . Based on this measurement of the pressure sensors that the determined pressure, that is, the zero pressure is lower than the predetermined value, the switching valve V switches to the first mode, so that only the first actuating cylinder S1 is driven to effect that the first operating rod 7 a pushes out of the first frame 4 a. As a result, the second frame 4 b is pushed away from the first frame 4 a in order to cause the cutting blades 6 to approach the tire T with the blades in their orientation held relative to the tire. Since the cutting blade 6 disposed opposite to a plurality of circumferential portions of the Rei fens T and the tire T is securely prevented on the conical tire-support portion 1 a lying from moving away by the cutting blades 6, the cutting blades come 6 as described above ultimately in contact with the tire T, so that the tire between the cutting blades 6 and the base end of the Rei fträgerteile 1 a (see Fig. 2) is clamped. While the cutting blades then cut something into the tire, the cutting pressure rises above the predetermined value, the increased pressure being determined by the pressure sensors 8 . Then, based on the measurements by the pressure sensor 8 , the switching valves V are switched to the second mode, so that the first operating rod 7 a is stopped and the front ends of only the second operating rods 7 b continue to move toward the tire T. allowed to. In this way, the cutting blades 6 are pivoted about the end of the first operating rod 1 a in the manner of a lever, whereby the cutting process of the tire T is completed (see FIG. 3). In the above, the cutting blades 6 are received in their Schwenkbe movement in cutting blade receiving grooves 11 , so that a collision between these blades and the ring attachment part 1 a is to be prevented.

According to the construction described above, only by placing the tire T on the tire fastening part 1 a, this tire T is fixed thereon when it comes into contact with the cutting blades 6 . So the fixing operation of the tire T only needs to put it on the tire mounting part 1 a. The conical shape of this tire mounting part 1 a eliminates the difficulty of setting up the lay position of the object every time a tire T of a different diameter is put on. In this way, the above construction can remarkably facilitate the tire support operation.

In addition, with the construction described above, in which each cutting blade 6 is pivoted around one of its end ends to cut the ring-shaped object, the ring-shaped object can be cut with a small force than that required in the prior art construction in which the object is press cut by cutting blades, which are held in a fixed position. As a result, the actuating rods 7 b require smaller forces, and consequently the performance requirements of the second actuating cylinder S2 for driving these rods can also be small. If the cutting blade 6 is stretched in length and the two actuating rods 7 a, 7 b are fastened with a maximum longitudinal distance between them on this cutting blade 6 , the lever effect can be increased in order to apply a greater cutting force to the annular object. Therefore, when a large diameter tire T requiring a large amount of cutting force is to be cut, this can be dealt with simply by lengthening the cutting blades 6 accordingly without increasing the force for the second hydraulic cylinder S2.

In addition, in the second mode, while the first operating rod 7 a, which is arranged on the inner radial side of the fixed tire T, is held stationary, the front ends of the second operating rods 7 b, which are arranged on the outer radial side of the same, continue to move towards this tire T and this tire T lies on the conical support part for annular objects 1 a, so that the cutting process is brought about by hard pressing the tire T in the direction of the pivot points of the cutting blades 6 . Therefore, this design enables softer and more efficient cutting operations than a further possible design, in which the cutting blades 6 are pivoted to cut the tire T lying on a flat holder. Since the shoulder areas of the tires T, which require a higher cutting force than the other sections of the same, are arranged closer to the pivot points of the cutting blades 6 than the other parts, this shoulder area can be cut relatively easily.

Next, other embodiments will be described ben.  

As shown in Fig. 6, the cutting edge of the cutting blade 6 may be arcuate, concave with respect to the back of the blade. This can improve the cutting behavior of the blade 6 . The particular shape of the cutting edge of the cutting blades can be changed in any other way to best match the shape of the object to be cut.

In a further design, which is shown in Fig. 7, the second frame 4 b is fixed to the struts 3 , so that the first and second actuating rods 7 a, 7 b can be driven independently to move relative to the second frame 4 b to be pushed forward or withdrawn. In the case of this design, the pressure sensor 8 is connected to the first actuating rod 7 a.

Except for the used tires used in the previous ones Embodiments are described, the annular any other object such as an electrical cable that is in the form of a ring that is wound on the ring fastener gung carrier is attached.

The shape of the ring carrier part of the mounting bracket is not limited to the conical shape that featured described in the embodiment. Other Shapes like an angled conical or prismatic or cylindrical shape are also possible.

The number of cutting blades is not limited to the four that be in the previous embodiment are written. Instead, six or eight of be used them or more or less.  

The invention can be carried out in others Chen forms without the idea or the essential feature times to leave. The present execution Shapes are therefore only as be in every respect writing and not to be regarded as restrictive, the Scope of the invention is appended by Claims displayed rather than through the previous loading description and all changes within the description interpretation and range of equivalency of the claims come, should therefore be included.

Claims (10)

1. Cutting machine for cutting an annular object with

• - a base
• - A mounting bracket, which is angeord net on the base to firmly attach the ring-shaped object to be cut thereon;
• - An actuating unit, which is to be moved to and away from the ring-shaped object which is fixedly attached to the said mounting bracket
• - A plurality of cutting blades, which are attached to a front of the end of said actuating unit to cut the annular object at a variety of circumferential portions thereof;

characterized,

• - That said operating unit ( 5 ) on a frame structure ( 4 a, 4 b) is fixed, which is supported by a plurality of struts ( 3 ), which in turn are supported on said base ( 2 ), so that said operating unit ( 5 ) from said frame structure ( 4 a, 4 b) is retractable and retractable towards and away from said fixed annular object (T);
• - That said plurality of cutting blades ( 6 ) at the front end of said operating unit ( 5 ) is fixed relative to the plurality of circumferential sections of the annular object (T), so that with forward movements of the named cutting blades ( 6 ) together with said operating unit ( 5 ) the annular object (T) is cut at a plurality of circumferential portions thereof;
• - That said operating unit ( 5 ) comprises at least one pair of operating rods ( 7 a, 7 b) for independently operating each of said cutting blades ( 6 ) from said frame structure ( 4 a, 4 b) towards and away from the annular Object (T), said operating rods ( 7 a, 7 b) pivotally supporting each of the cutting blades ( 6 ) so that said cutting blades ( 6 ) can pivot on the ring-shaped object (T) and swing away;
• - That switching devices (V) are provided to selectively provide a first mode in which the front ends of said pair of actuating rods ( 7 a, 7 b) can approach the annular object (T) at substantially the same speed, and a second mode in which one of the ge actuating rods ( 7 a) is held while the other actuating rod ( 7 b) can approach the annular object;
• - That pressure sensor means ( 8 ) are provided to determine a cutting pressure which is exerted on said cutting blades 6, and
• - That a control device ( 9 ) is provided to control said switching means (V) based on the cutting pressure determined by said pressure sensor means ( 8 ), in such a way that said switching means (V) provide said first mode when the determined cutting pressure is lower than a predetermined value and that said switching means (V) provide said second mode when the determined cutting pressure is higher than said predetermined value.

2. Cutting machine according to claim 1, characterized in that in said second mode during one of the genann th actuating rods ( 7 a), which is on the radially inner side of said fixed annular object (T), is held stationary, the front end the other operating rod ( 7 b), which is arranged on the radially outer side thereof, can move further towards the ring-shaped object. 3. Cutting machine according to claim 1 or 2, characterized in that a plurality of cutting blades ( 6 ) are arranged equidistantly from a plurality of around circumferential sections of the annular object 4. Cutting machine according to one of claims 1 to 3, characterized in that said frame structure ( 4 a, 4 b) comprises a first frame ( 4 a) which is fastened to said struts ( 3 ) and a second frame ( 4 b), which is displaceable relative to said struts ( 3 ), that said actuating rod ( 7 a), which is arranged radially inside with respect to the defined annular object (T), by a first hydraulic cylinder (S1 ) from said frame ( 4 a) forth and retractable in the direction of and away from the fixed annular object (T) and that said machine has a plurality of said actuation rods ( 7 b), which with respect to the specified annular Item (T) are positioned radially outside of half and which are arranged around said actuation rod ( 7 a), which is arranged radially inside, each of said outer actuation rods ( 7 b ) by a second hydraulic cylinder (S2) from said second frame ( 4 b) forth and retractable in the direction and away from the fixed annular object (T). 5. Cutting device according to one of claims 1 to 4, characterized in that a front end of said actuating rods ( 7 b), which are arranged radially outside of the fixed annular gene gene object (T), pivotally connected to each of said cutting blades ( 6 ) is via an elongated slot which is formed along the length of said cutting blade ( 6 ). 6. Cutting machine according to one of claims i to 5, characterized in that said actuating rod ( 7 a), which is arranged radially within said fixed annular object (T), is fixedly connected to said second frame ( 4 b), so that said operating rod ( 7 a) and said second frame ( 4 b) are advanced and retracted together towards and away from the annular object (T). 7. Cutting machine according to one of claims 1 to 6, characterized in that a cutting edge of said cutting blade ( 6 ) is arcuate, concave with respect to the back of the blade ( 6 ). 8. Cutting machine according to one of claims i to 3, characterized in that said frame structure ( 4 a, 4 b) comprises a first frame ( 4 a) which is fixed to said struts ( 3 ) and a second frame ( 4th b) which is attached under half of said first frame ( 4 a) to said struts ( 3 ) and that said pairs of actuating rods ( 7 a, 7 b) can be independently advanced and retracted from said second frame ( 4 b ). 9. Cutting machine according to claim 8, characterized in that a front end of said actuating rod ( 7 b), which is arranged radially outside of the fixed ringförmi gene object (T), by means of an elongated slot along the length of the genann th cutting blade ( 6 ) is pivotally connected to said cutting blade ( 6 ).