RU214746U1 - DEVICE FOR CUTTING CYLINDRICAL CONDUCTIVE PRODUCTS - Google Patents

Abstract

The utility model relates to the field of machining associated with the operation of cutting cables (ropes, bars) into separate segments of a given length.

The technical result achieved by the solution is the automatic cutting of products with narrowing at the cut point.

The specified technical result is achieved due to the fact that a device for cutting cylindrical conductive products has been developed, containing:

- a housing containing a pushing unit, a collet chuck, a broach unit, a pressure plate, a rupture unit, a heating unit;

- a pushing unit configured to push the cable through the collet and mounted in the housing relative to the collet so as to push the end of the cable through the collet;

- a collet chuck designed to fix the cable and at the same time provide electrical contact with it, as well as with the ability to twist the cut section of the cable when it reaches a predetermined temperature;

- a broach block, configured to move the cut rope to the storage area, installed in the housing relative to the pressure plate so as to receive the rope from it;

characterized by the fact that

- the pressure plate is configured to clamp the cable and at the same time provide electrical contact with it and is installed in the housing relative to the collet chuck so as to receive the cable coming out of the collet chuck, while the pressure plate is installed on the breaking block;

- the rupture block is configured to break the heated cable due to its movement relative to the collet chuck and is installed in the housing with the possibility of movement relative to it;

- the collet chuck is configured to rotate the heated cable to break it.

Description

Field of technology to which the utility model belongs

The utility model relates to the field of machining associated with the operation of cutting cables (ropes, bars) into separate segments of a given length.

State of the art

Known cable cutting machine (CN102814582A, publ. 2012-12-12), relating to the field of cutting and designed to solve the problem of insufficient cutting accuracy of the existing cable mandrel. The cable mandrel cutting machine includes stand, conveyor structure, control system and cutting structure; the cutting structure comprises electrodes, a first air cylinder, a second air cylinder; the first air cylinder and the second air cylinder are located on both sides of the electrodes; the electrodes comprise an upper electrode and a lower electrode; and the lower electrode is rigidly fixed on the stand. Due to the location of the cutting structure of the cable mandrel cutting machine, the cable mandrel can be cut by melting under instantaneous high current. A good cutting effect of the cable mandrel can be achieved, and the breaking of the cable mandrel is neat without burr. The cable mandrel cutting machine is convenient to use and highly accurate.

However, this solution does not disclose means for turning and simultaneously breaking the cable when cutting.

Known machine for cutting with resistive heating by electric current (KR101126625B1, publ. 2011-10-27). Known device for cutting wire contains the base; movement block; fixation block; moving block; driving means for moving the movable block towards the fixed block; a first cover rotatably connected to the top of the fixation block with a wire inserted therebetween; a second cover rotatably connected to the top of the movable block with a wire inserted therebetween; a power supply connected to the fixed unit and the movable unit to supply current; a control unit for controlling the first movement unit, the first cover, the second cover, the driving means and the power supply.

However, this solution does not disclose means for turning and simultaneously breaking the cable when cutting.

Known as a prototype device for cutting a cable (KR101754036B1, publ. 2017-07-05). The known invention relates to a device for cutting a rope, containing a feeding part for pulling a rope from a reel; a first locking part for pulling and fixing the rope; a second locking part, which is located in series with the first locking part with respect to the direction of pulling the cable and which contains and fixes the cable, stretched through the first locking part, to a cutting length; and a cutting part for cutting the cable between the first fixing part and the second fixing part. Moreover, at least one of the first fixing part and the second fixing part can rotate the fixed cable in the direction of cable twisting when cutting the cable at the cutting section.

However, this decision does not disclose the details of the cutting process, nor does it propose cutting the product by simultaneously twisting and tearing.

Utility Model Disclosure

In one aspect of the utility model, a device for cutting a cylindrical conductive article is disclosed, comprising:

- a product storage unit configured to store the product to be cut;

- a pushing and measuring unit configured to push the product through the fixation unit and to measure the predetermined length of the cut off part of the product;

- a locking unit configured to fix the product and at the same time provide electrical contact with it, as well as with the ability to twist the cut section of the product when it reaches a predetermined temperature;

- block broach, made with the ability to move the cut off parts of the product in the storage area;

a clamping unit configured to clamp the article and still make electrical contact with it;

- a rupture block, configured to rupture the product when a predetermined temperature of the product section between the fixation block and the clamping block is reached;

characterized in that it additionally contains a heating unit configured to supply a current of a given strength to the section of the product between the fixing unit and the clamping unit for a given time,

the locking block is a collet chuck.

In additional aspects, it is disclosed that the rupture block is a platform that is movable along a direction parallel to the axis of the cut off part of the cylindrical product; the locking unit is configured to perform from 1 to 5 revolutions until the product is completely broken; the broach block is made in the form of rollers, made with the ability to clamp the product and move it along the tube; the broach block, the clamping block, the breaking block are installed on the same platform, which can be moved along the device body.

The main problem solved by the claimed solution is the automatic cutting of conductive cables, ropes, rods, preferably steel, with narrowing in the cut off area.

The essence of the solution lies in the fact that the claimed device measures the desired length of the cut off part of the product, fixes the product to the left and right of the cutting site, passes electric current through the product section, the current heats the product section to a predetermined temperature, then the heated product section is stretched and twisted to cut the product, while the section of the product in the place of cutting at both ends remains narrowed.

The technical result achieved by the solution is the automatic cutting of the product with an even narrowing at the cut point.

Brief description of the drawings

Fig. 1 shows a block diagram of a cutting device.

Fig. 2 shows the sequence of operations in the operation of the cutting device.

3 shows an embodiment of the product.

Implementation of the utility model

It is preferable to use the claimed device for cutting a cable woven from a plurality of strands (at least two), however, it can also be used to cut wire, which does not limit the scope and purpose of the solution. Ropes, ropes, wires and other objects that can be cut using the claimed solution, hereinafter referred to as "products". In the description, we will talk about the cable, since for it the advantages of the claimed device are most obvious.

A simple cut of the cable results in a split end that must be assembled somehow so that the cable does not unwind and is convenient to use.

A simple heating of a section of the cable to separate it into two parts leads to the formation of a ball at both ends of the cable and a strong curvature of the ends of the cable, which can degrade the performance of the cut parts of the product, since the diameter of the ball is larger than the diameter of the cable / wire, and the curvature can interfere with operation.

In this regard, the developers proposed to cut products using heating with simultaneous rupture by stretching and turning.

When the cable is stretched, only the part of the cable that is heated to a temperature close to the melting temperature (this temperature ensures the product glows red-hot (for steel), but does not lead to product spreading) is elongated, which is located between the two electrodes. The rotation of the cable provides a better connection of the strands, a greater narrowing of the cut ends. As a result, rope cuts of a given length are obtained with firmly connected strands and tapered ends. This solution ensures reliable production of the conical end of the product, since the rupture of the unmelted product will not lead to a narrowing of the end, the absence of twisting will lead to poor fixation of the cable threads, the absence of tearing can lead to local thickening of the product.

The claimed device consists of:

- block 101 storage products;

- a push and measure unit 102 which pushes the product through the fixing unit 103 while measuring the desired length of the product;

- block 103 fixation, which is a collet chuck. Block 103 is configured to pass a product through the collet and clamp it when a predetermined length is measured, also block 103 is configured to rotate and thereby twist the product;

- block 104 broach, which pulls the cut product;

a clamping unit 105 which clamps the article when the predetermined length has been measured;

- block 106 gap, which breaks the product when it reaches the area between the blocks 103 and 105 of the specified temperature;

- block 107 heating, which supplies the section of the product between the blocks 103 and 105 current of a given strength for a given time.

All the mentioned blocks are fixed in a single body through assembly operations, also all blocks are connected to each other (part - directly, part - indirectly through the body or other blocks) through assembly operations, also all blocks are functionally connected to each other directly or indirectly and are directed to performance of a single common function. The block diagram of the device is shown in Fig. one.

The product storage unit 101 stores the wire or cable to be cut, preferably in the form of a bobbin on which the cable or wire is wound, but other storage options are possible that allow automatic feeding of the product. Such options may be round containers in which coils of wire or cable are packaged, and the packaging should allow the wire or cable to be pulled out without tangling.

The storage unit 101 is part of, or attached to, the housing through assembly operations at the factory, thereby automating the process.

The pusher unit 102 is preferably powered pinch rollers to move the product as the rollers rotate. Block 102 is attached to the body through assembly operations at the factory. The location of the block 102 is chosen so that it is possible to grab the product from the block 101. Initially, the operator pulls the end of the product, places it between the rollers, then the rollers move the product along the chute or pipe to the block 103. The chute or pipe is needed to direct the movement of the product, which is usually flexible. Options without a chute/pipe are possible if the rollers are located close enough to the block 103. The trajectory of the movement of the product from the block 101 to the block 102 should preferably be without bends with a radius of less than 20 cm so as not to deform the product, as this may adversely affect the movement of the product through subsequent blocks, which will hinder process automation.

The clamping unit 103 is preferably a collet, through which the unit 102 pushes a predetermined length of the workpiece, after which the chuck clamps the workpiece so as to provide a secure hold and electrical contact between the chuck and the workpiece. The collet chuck provides the ability to effectively transfer current to the object being cut, which is not so easy to provide in the case of a cam chuck, which can be very hot due to loose contact between the cams themselves and the chuck to which the voltage is applied, due to the smaller contact surface of the chuck and the workpiece . Applying tension directly to the cam is much more difficult to implement than with a collet. The use of a heated jaw chuck can lead to jamming, sticking of the product to the chuck and the need to constantly monitor the temperature of the chuck, which hinders the automation of the process.

Block 103 is attached to the body through assembly operations at the factory. The place of attachment is chosen so that the product from block 102 enters block 103. Block 102 and block 103 can be attached to each other, and can be rigidly installed relative to each other by mounting in the housing. Rigid fixation is necessary in order for the product to move along the correct trajectory and move from one block to another.

The drive unit 104 is preferably a driven pinch rollers to move the product as the rollers rotate. A variant with magnetic means of movement, hooks, etc. is possible.

The block 104 is attached to the body via the block 106 through assembly operations at the manufacturing plant. The location of block 104 (block 106 on which block 104 is mounted) is chosen such that it is possible to capture the end of the product from block 103. Without such a grip, it is impossible to remove the cut piece from the device.

The clamping unit 105 is preferably a pressure plate that presses the article to hold it securely and provide electrical contact between the pressure plate and the article. It is possible that the clamping unit is a chuck.

The block 105 is attached to the body through the block 106 through assembly operations at the manufacturing plant. The connection point is chosen so that the product from block 104 enters block 105. Block 104 and block 105 can be attached to each other, and can be rigidly installed relative to each other by mounting in the housing. Rigid fixation is necessary in order for the product to move along the correct trajectory and move from one block to another.

The breaking block 106 is a platform on which the block 104 and the block 105 are mounted, which moves away from the block 103 after the product is heated to break it. Block 106 is movably mounted in the housing, its linear movement relative to block 103 leads to product breakage, since block 103 is rigidly fixed on the body.

Simultaneous rotation of the block 103 provides a narrowing at the point of cut, as well as a reliable connection of the cable threads. Alternatively, block 106 may be implemented as pinch rollers or a powered hook that stretches the product and thereby breaks it. In such a case, the block 106 is fixedly mounted in the housing. A variant with initial rotation for a better connection of the turns and subsequent stretching for the final break of the cable is possible. If the cable is initially stretched, then the likelihood of an uneven and/or non-constricted cut increases.

The heating unit 107 is a current source that supplies current to the section of the product sandwiched between the unit 103 and the unit 105. For this, contact pads with low electrical resistance mounted on the collet and pressure plate (plates) can be used; Through them. The block 107 is installed in the housing through assembly operations at the factory and is connected to other blocks through wired electrical communication lines.

The operation of the device is controlled by the control unit, which sends control signals to all units in order to move the product, fix it, heat it, and break it. The control unit is preferably a controller or microcontroller, which is connected by communication lines to all units of the device, provides them with control signals to actuate them.

The controller can receive from the operator data on the parameters of the product being cut using the control panel. In one of the options, the controller is configured for cutting the same type of products and does not receive external signals, except for the signal to start cutting.

Description of the device

The block diagram of the operation of the device is shown in Fig. 2. The cutting cycle begins by feeding the cable from the storage to the cutting area (between the clamp block 103 and the clamp block 105), when the cable is fed, its length is measured, any suitable means can be used for this, for example, the length can be measured by measuring the number of revolutions of the pinch rollers.

When the desired length of cable has been moved through block 103 and block 105, they clamp and lock the cable.

Once the cable is secured in this way, heating unit 107 applies current to the section of cable between blocks 103 and 105. The current is applied through wires of sufficient gauge so that they do not overheat. The material and dimensions of blocks 103 and 105 are also chosen so as to ensure that essentially only the cable is heated, but not the elements of the claimed device.

The current is supplied with such a force and for such a time to ensure that the cable is heated to a predetermined temperature. The heating should be such that the section of the cable between the blocks 103 and 105 is heated and becomes plastic. The specific temperature is determined mainly by the material of the cable, the thickness of the cable, the number of threads in it also matters. If a wire is cut, then the heating temperature is determined by the material of the wire and its thickness. The current strength and voltage, as well as the heating time, are set in advance for each product separately. For each individual case, the optimum temperature can be determined through calculations or experiments, which is not a task that requires creative efforts from a person skilled in the art.

The locking unit 103 is configured to start twisting the cut section of the product before it is heated, and the breaking unit 106 is configured to tear the product after the section is heated. In the case of a rope, such a solution makes it possible to securely obtain a constriction at the ends of the rope, since the end of the cut rope takes on a conical shape. If the end of the cable fluffs up, it may cause the whole device to malfunction, jamming, improper heating, etc. Also, with this solution, the load on block 106, block 103, block 105 is reduced, due to this they work more reliably.

After the cable is cut, the broach unit 104 moves it to the finished product storage area. The cycle then repeats a specified number of times. The storage area can be a container inside the device or an external box into which the finished product falls and cools down.

The device can be controlled in manual, semi-automatic or automatic modes. The preferred option is automatic mode, in which the control unit gives appropriate commands to all other units. The strength of the current and the duration of its supply are determined by the parameters of the product being cut (primarily the material, the diameter of the product), the achievement of the technical result is ensured by automatic stretching and twisting of the conductive product, brought to a plastic state by heating with electric current.

Embodiment 1

In one embodiment, the rupture block 106 is a platform movable along a direction parallel to the axis of the cylindrical article.

In the preferred embodiment, the platform also has a clamp block 105 and a broach block 104, which simplifies the design of the proposed device and increases the reliability of its operation. If the block 104 is located outside the platform, means must be provided that will allow the block 104 to pull the product without losing it during the movement of the block 106.

Embodiment 2

In one embodiment, the locking block 103 is configured to perform 1 to 2 revolutions until the product is completely broken. A variant up to 5 revolutions is possible, if the material does not collapse at 1-2 revolutions. This solution makes it possible to reliably obtain the desired cut shape. If the block 103 makes less than one revolution to break the product, then the probability of non-tapered ends, poor connection of the cable threads, increases.

Embodiment 3

In one embodiment, the drive unit 104 is a tube into which pinch rollers are embedded to move the product. The drive drives the rollers, which in turn move the cut product. Block 104 and block 102 must be synchronized with each other so that there is no overlap between the cut and cut parts of the product.

Embodiments are not limited to the embodiments described herein, other embodiments of the solution will become apparent to a person skilled in the art based on the information set forth in the description and knowledge of the prior art, without going beyond the essence and scope of this solution.

Elements mentioned in the singular do not exclude the plurality of elements, unless otherwise specified.

The functional connection of elements should be understood as a connection that ensures the correct interaction of these elements with each other and the implementation of one or another functionality of the elements. Particular examples of a functional connection can be a connection with the possibility of exchanging information, a connection with the possibility of transmitting electric current, a connection with the possibility of transmitting mechanical movement, a connection with the possibility of transmitting light, sound, electromagnetic or mechanical vibrations, etc. The specific type of functional connection is determined by the nature of the interaction of the mentioned elements, and, unless otherwise indicated, is provided by well-known means, using principles well-known in the art.

The methods disclosed herein contain one or more steps or actions to achieve the described method. The steps and/or steps of the method may substitute for each other without departing from the scope of the solution formula. In other words, if a specific order of steps or actions is not defined, the order and/or use of specific steps and/or actions can be changed without going beyond the scope of the decision formula.

The application does not specify specific software and hardware for implementing the blocks in the drawings, but it should be clear to a person skilled in the art that the essence of the solution is not limited to a specific software or hardware implementation, and therefore any software and hardware known to in the state of the art. Thus, the hardware can be implemented in one or more application specific integrated circuits, digital signal processors, digital signal processing devices, programmable logic devices, user programmable gate arrays, processors, controllers, microcontrollers, microprocessors, electronic devices, other electronic modules made with the ability to implement the functions described in this document, computers, or a combination of the above.

Although exemplary embodiments have been described in detail and shown in the accompanying drawings, it should be understood that such embodiments are illustrative only and are not intended to limit the broader solution, and that this solution should not be limited to the specific arrangements and structures shown and described. as various other modifications may be apparent to those skilled in the art.

Features mentioned in various dependent claims, as well as implementations disclosed in various parts of the description, can be combined to achieve beneficial effects, even if the possibility of such a combination is not explicitly disclosed.

Any numerical values set forth herein or in the figures are intended to include all values from the lower value to the upper value in one unit increments, provided that there is an interval of at least two units between any lower value and any upper value. . By way of example, if it is stated that the value of a component or value of a process parameter such as temperature, pressure, time, and the like, for example, has a value of 1 to 90, preferably 20 to 80, more preferably 30 to 70 , it is understood that values such as 15 to 85, 22 to 68, 43 to 51, 30 to 32, etc. are explicitly listed in this solution description. As for values that are less than one, if necessary, one unit element is considered to have a value of 0.0001, 0.001, 0.01, or 0.1. These are merely examples of what is specifically intended, and all possible combinations of multiple values between the lowest value listed and the highest value listed are to be considered expressly stated in this application in this manner.

Claims (15)

1. A device for cutting conductive cables, containing a push unit fixed in the housing, installed with the possibility of grabbing and pushing the end of the cable and measuring the specified length of the cut part of the cable, cable fixing block, cable clamp block, rupture block mounted between the fixation block and the clamp block with the possibility of breaking the cable section when it reaches a predetermined temperature, a heating block configured to supply current to a section of the cable clamped between the fixing block and the clamping block, broach block, configured to receive and move the cut off part of the cable to the storage area, different in that the locking unit is made in the form of a collet chuck, which allows the end of the cable to be passed through it to the clamping unit and the cable is fixed to obtain electrical contact, while the collet chuck is made with the possibility of its rotation to twist the section of the cable being cut until it reaches a predetermined temperature of its rupture, the clamp block is made in the form of a pressure plate with the possibility of clamping the cable and obtaining electrical contact. 2. The device according to claim. 1, characterized in that the rupture block is a platform made with the possibility of movement along a direction parallel to the axis of the cut off part of the cylindrical cable. 3. The device according to claim 2, characterized in that the broach block is installed on the platform of the gap block. 4. The device according to claim 1, characterized in that the broach block is made in the form of rollers mounted in a tube and provides clamping of the cable and its movement along the tube. 5. The device according to claim. 1, characterized in that the collet chuck is made with the possibility of its rotation from 1 to 5 revolutions until the cable section is completely broken. 6. The device according to claim. 1, in which the collet chuck is configured to twist the section of the cable being cut before it is heated, and the breaking block is configured to break the cable after the said section is heated. 7. The device according to claim. 1, in which the distance between the collet chuck and the pressure plate is from 2 to 5 cm.

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