DE3228064A1 - Hose cutting apparatus - Google Patents

Abstract

A hose cutting device, in particular for cutting so-called high-pressure hoses, has a rotary cutter (2) for this purpose. The hose moves in steps according to the cutting length to behind the cutting edge (2), essentially in the direction of the axis (3). At the moment of the cutting process, a relative movement takes place between the cutting edge (2) and the hose, the cutting edge (2) cutting through the hose. The device is equipped with a hose carrying, guiding and feeding device for transporting the hose with respect to the cutting edge and for generating the above-mentioned relative movement in the radial direction of the cutting edge (2). The supporting and guiding devices (control members 34, 35) are adapted at the point of intersection so that they can bend the hose onto the cutting edge (2), a tensile stress being generated at the point of curvature in such a way that the cut is opened, whereby the frictional forces are applied the cutting edge (2) can be reduced. The carrying and guiding device (control elements 34, 35) comprise two tubular devices (34, 35) through which the hose is guided.

Description

Jorma Lillbacka, SF-62300 Härmä, Finland

P 30

Hose cutting device

The invention relates to a hose cutting device, in particular for cutting so-called high-pressure hoses, in which the cutting process is carried out by means of a rotor cutter, and the hose is moved in the forward direction by one cutting length after the cutter, mainly in its axial direction, and a relative movement between the hose and the cutter takes place in the radial direction of the cutting edge, the cutting edge the. Cut the hose transversely.

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The hose is guided by suitable guide and support devices on the cutting edge and worn.

A similar mode of operation is in principle from the hose cutting device currently in use known. Their main disadvantage, however, is that a rough cut surface is left behind and that the tubing causes such high friction on each side of the cutting edge, weh The cutting edge rotates at such a high speed that the sides are not clean and smooth can be produced, but the rubber or plastic material burns in and forms slag. Through this the cutting result is worsened. To overcome these disadvantages, the cutting edge must be quite cleaned frequently, which in turn is cumbersome and time-consuming.

The object of the invention is to overcome the near parts explained above and 'create a new one To create cutting device with which free and undisturbed cutting is possible.

According to the invention, the object is specified in the characterizing part of claim 1 Features solved.

The main essence of the invention is based on the fact that the support and guide device for the.

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Hose at the time of the cutting process, the point of intersection against the cutting edge "bends, whereby at At this point, a tensile stress or bending stress is generated, which widens the cut and thus the abrasion and friction between the side edges of the cutting edge and the point of intersection reduced.

Further advantageous embodiments of the invention are explained in the subclaims.

. Further details and advantages of the invention will be provided in an exemplary embodiment below with reference to the accompanying schematic representations ^ the hose cutting device explained in more detail. They show in detail:

Figure 1: a schematic representation in profile

A-A at the level of the cutting disc of the device, more or less perpendicular to the feed direction of the blank to be cut;

Figure 2: a schematic representation in front view the guiding and carrying device for the hose with the machine according to the invention as well as the rotor cutting edge located in the vicinity connected to the way it works

to illustrate the invention;

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Figure 3: a somewhat more detailed representation of the supply, carrying and guide device for the hose cut body in the machine according to the invention and the rotor

cut with a control and feed device;

FIG. 4: a schematic representation in plan view (Direction S in Fig. 3) of the feeding, carrying and guiding device.

The inventive machine consists of a kastenformxgen body 1, which is preferably closed _r, which is shown in Fig. 1 only in outline with the front and rear walls, the floor and the ceiling with a generally known construction. The body takes on a rotor milling cutter or rotor cutting edge 2, which is preferably provided with a smooth, create cutting edge. The cutting edge is attached to an axis 3 in a known manner so that it can be released and changed, the axis being driven and mounted in a known manner, e.g. B. by means of bearings on the top of the carrier beam 5. To drive the cutting edge 2, an electric motor 6 is attached below the carrier beam 5 ″, which drives the axis 3 of the cutting edge via a belt 7 and pulleys 8 and 9.

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The beam 5 is transverse to the machine, preferably arranged horizontally and its leading edge is so engaged to transversely perpendicular to the plane of the machine to be pivoted, the chord 2 being raised as required for cutting and can be lowered. To enable this movement, a drive unit, e.g. B. a hydraulic cylinder 10 is provided, the lower end 11 of which at the bottom of the body and the upper end part of the piston rod 12 at the free end of the Beam 5 is hinged. Protective plates 13 and 14 are provided on each side of the cutting edge, if necessary, can be removed whenever the cutting edge is changed. The cutting edge will thus operated in a closed space, which is secured up to the upper part, whereby the Plates have an opening or recess for the blank at the point of intersection.

Between the protective plates on the bottom of the machine there is a socket 15, into which production residues fall. The pipe can, for example, contain water, to prevent the waste caught in the moving parts of machines, where they could cause damage · It is also possible borrowed, 16 to connect a deduction or an outflow on the front part of the MascMne and because, for example, a Vacuum clean v. To attach a hose that sucks up fine dust that is released during the cutting process? can occur.

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According to the invention, devices are connected to or in front of the machine, preferably in the upper part seen guiding the hose, preferably in a horizontal direction perpendicular to the cutting surface, and who carry the hose and towards feed onto the cutting edge and after a spring cut the hose by a previously adjustable cutting length move forward to perform a simitt again.

The device mentioned contains first of all a set of disks and a counter gear, the are arranged along the hose path to a carrier and conveyor line for the hose below and form above it. Second, the device includes hose guide tubes or the like Facilities that carry the hose "and lead adjacent to the intersection.

The cutting machine described in the exemplary embodiment preferably contains three wheels or rollers 17, 18 and 19, which are connected to one another by means of a chain drive 20 and 21 are connected, the drive taking place via each roller. The middle Roller 18 is connected to the drive motor by means of the chain drive 21a.

A counter or take-up roller 22 is provided above the roller 17 on the hose feed side, in a bearing at one end of the lever arm 23

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is installed, while the other end is fixed in a bearing of a connector 24. The middle counter roller 25 is mounted in a bearing on the lever arm 26, which is also in a Storage is attached to the connector 24. The counter rollers 22 and 25, the z. B. can be biased by means of a spring, weraen against pressed the hose blank, which is fed via the rollers 17 and 18, the friction between them the rollers and hose blank is high enough to allow the feed movement. With the exception the counter roller 25, the free end of the lever arm 26 also takes an electrical transmitter 45 to Display and storage of a cutting impulse in the automatic control of the machine.

Above the third drive roller 19, a pair of rollers 27 is provided, the distance from which Pull roller 19 can be adjusted by means of a screw 28 to adjust the pair of rollers according to the hose thickness to raise and lower and at the same time the necessary pull resistance or feed resistance to adjust.

In the lateral direction the hose is supported by three opposing pairs of rollers 29, 30 and 31 guided, the relative distance between the opposing rollers being set by means of a screw 32 can be.

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by turning a hand wheel 33, the rollers can be made closer or further apart from one another can be adjusted according to the thickness of the shaft. The mechanism can be implemented in a correspondingly known manner.

According to the invention, the hose guide system contains tubular control members 34 and 35 on the cutting edge, through which the hose is passed. The tubular control members 34 and 35 are in longitudinal

Ί0 extension to each other built in, with the end faces come to rest on each other directly above the cutting edge. The control organs 34 · and 35 are in bearings near and above the opposite end faces by means of legs 36 and Bearing pin 37 sm connecting element 24 "attached, which in turn is connected to the piston rod 39 of the drive cylinder 38. The outer ends of the tubular control members 34 and 35 are in stock with transverse flaps 40 installed on a stop or suspension tube 4-1 on the machine body, wherein the stops have horizontal elongated holes 42.

When the machine according to the invention is used to cut a hose, the pipe control members 34 and 35 bent downwards with the aid of the drive cylinder 38, the connection point 43 of the parts 34 and 35 is opened and forms a slot through which the cutting edge

3228-64 42

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cuts across the tube. The "curvature" movement causes a tensile stress in the hose blank on the one facing the cutting edge Side so that the cut ends of the hose are kept away from the surface of the cutting edge, with no unnecessary friction and heat between the side surfaces and the hose, and thus the cutting operation can be carried out freely. The hose material does not stick ΊΟ the cutting edge, Perner the cutting edge remains clean and the work process is not disturbed.

The fastening mechanism of the cutting edge and the The drive motor enables the cutting movement to be partially carried out by advancing the cutting edge in an upward direction to create. This makes the cutting process even faster.

To determine the cutting length, one of the rollers is for example the upper one in the middle 25 as a measuring roller formed, this in a known manner with a transmitter or transmission element of a electronic length measuring instrument is equipped. To enable an exact measurement, is also a transmitter 44 for sampling and registering the position of the hose end at the front end of the tubular control member 35 on the Side of the continuous hose provided. The machine is thus advantageously so trained to operate automatically

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can, so that the cutting movements and the feed are programmed by a cutting length and number Microprocessor can be controlled. The microprocessor receives during the cutting process or computer .. measurement data obtained by the Above mentioned transmitter or transmitter are forwarded.

The above-mentioned pipe control elements can easily be changed in order to adapt them to the different Adjust hose diameter. The feed direction can be changed, either with a front and reverse motor or a gear. The feed speed can also be adjusted will.

An electrical control cabin, a control panel, can be connected to or separated from the machine or starboard with all necessary start, control and program switches and measuring devices can be provided.

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Claims (9)

Jorma Lillbacka, Sit-62300 Härmä, Finland P 30 Hose cutting device claims ^ 1. Hose cutting device, especially for cutting so-called high pressure hoses, with an eotor blade for cutting, with the hose by cutting length to behind the cutting edge is moved, preferably in the axial direction to this, and in the one during the cutting process Relative movement takes place between the cutting edge and the hose, the cutting edge breaking the hose - 01 - J. Lillbacka 77 P JO cuts across, and with a support, guide and feed device for forwarding the hose relative to the cutting edge and for production the above-mentioned relative movement of the cutting edge in the radial direction, characterized in that that at the point of intersection a support and guide device (control elements 34 ·, 35) is provided which is set so that the hose is bent towards the cutting edge (2), whereby a stretching force is generated at the point of curvature of the hose, which minimizes the friction of the cut Cutting edge (2) looks to open. 2. Hose cutting device according to claim 1, characterized in that the cutting and Guiding devices (34-, 35) consist of two tubular Control processes (34-, 35) exist through which the hose is guided, while the outer end of the controls in a bearing on the machine body attached to one another by a transverse pin (40) and an anchor eye (4-1) with the respective ends being mounted in bearings on a connector (24 ·) which in the vertical direction by means of a drive unit, e.g. B. by means of a cylinder (39) for generating a bending movement of the hose can be driven. 3. Hose cutting device close to claim 1 or 2, characterized in that the lever arms (23, 26) - 02 - J. Liirbacka 77 P 30 in a bearing on the connector (24) towards the tubular control members (34, 35) are attached, and that at the end of the lever arms (23, 26) hose guide rollers (22, 25) are provided, which are against the hose above corresponding feed carrier and feed guide rollers (17, 18) are pressed. 4 ·. Hose cutting device according to one of the claims 1 to 3 »characterized in that below the tubular control members (34-, 35) in front of and behind these support and guide rollers (17, 18, 19) are provided with a mechanical Drive by means of a drive motor and a chain transmission device (20, 21) are provided. 5. Hose cutting device according to one of the claims 1 to 4 ·, characterized in that a pair of rollers (27) is provided above the roller (19), its distance from the feed roller (19) can be adjusted by means of a device, e.g. a screw (28) is. 6. Tube cutting device according to one of claims 1 to 5, characterized in that with the rollers (19, 27) are also connected to a pair of rollers (29, 30, 31) for lateral guidance, their distance from each other according to the hose thickness and to generate the required contact pressure - 03 - J. Lillbacka 77 P 30 pressure are adjustable. 7. Hose cutting device according to one of claims to 6, characterized in that a transmission member (44) close to the end of the tubular Control member (35) is provided for scanning the hose end. 8. Tube cutting device according to one of claims 1 to 7? characterized in that a the roles, e.g. B. roller (25) designed as a measuring roller and with a known transformer for a electronic length measuring device is provided. 9. Tube cutting device according to one of the claims 1 to 8, characterized in that the end of one of the two lever arms (26) with a electronic pulse transmitter is provided, which the automatic cutting process in the automatic Control of the device registered.