CN117498234A - Automatic cutting device and cutting method for sheath layer of armored cable - Google Patents

Abstract

The invention discloses an automatic cutting device and a cutting method for an armored cable sheath layer, and belongs to the technical field of cables; the rotating device is positioned between the fixing device and the cutting device; the rotating device comprises a rotating seat; the cutting device comprises a limiting unit, a left friction roller, a right friction roller and a rotary cutter head; the limiting unit, the left friction roller, the right friction roller and the rotary cutter head are arranged on the inner side of the rotary seat; the left friction roller and the right friction roller are positioned at two sides of the rotary cutter head; the limiting unit comprises a plurality of limiting rods; the limiting rods are arranged on the inner side of the rotating seat, one of the limiting rods and the rotating cutter head are positioned on the same horizontal line, and the limiting rods are positioned on the inlet side of the steel tape armored cable; the rotary cutter head is positioned at the outlet side of the steel tape armored cable. The invention can avoid the problems of incomplete cutting or too deep cutting caused by uneven thickness of the cable sheath layer and uneven outer circle of the cable.

Description

Automatic cutting device and cutting method for sheath layer of armored cable

Technical Field

The invention relates to the technical field of cables, in particular to an automatic cutting device and a cutting method for an armored cable.

Background

The steel tape armoured cable is an electric energy or signal transmission device which is made of several or several groups of mutually insulated steel tape layers which are coated on the periphery of the lead and are externally covered with insulating protective layers; in the processing process of the cable, from the processing of the conductor, the wire and cable product is manufactured by adding protective layers such as insulation, shielding, cabling, protection and the like on the periphery of the conductor layer by layer; the cable is mainly applied to power systems, information transmission, instrument systems and the like at present.

The steel tape armoured cable itself plays a role of electric energy or signal transmission, and has the problem of being connected with other equipment at the beginning and the end when in use. In this case, the metal protective layer, insulating layer, etc. outside the cable need to be stripped off to expose the conductor for reliable connection with other devices. The stripping method of the cable sheath layer is a manual stripping method by using an electrician knife or other auxiliary tools, and also is an automatic stripping method by using an automatic device.

The application publication number CN116365428A provides a full-automatic cable cutting device and method. According to the scheme, the blade capable of automatically controlling the radial cutting depth is adopted to axially cut the cable sheath layer, and the rotary blade capable of automatically controlling the radial cutting depth is adopted to annularly cut the cable sheath layer. Finally, the cable sheath layer is stripped by an automatic mechanism. According to the scheme, the end face of the cable is measured before the cable sheath layer is cut, and the cutting depth of the cutter is adjusted according to measured data. Although the cutting depth is controlled according to the measurement result, the non-uniformity of the thickness of the sheath layer of the cable is not considered, the position of the sheath layer can be cut in an impermeable way, and the position of the sheath layer is thin, the inner wire core can be cut deeply. And the problem of irregular outer circle of the cable is not considered, and the result is similar to that caused by uneven thickness of the sheath layer.

Disclosure of Invention

Aiming at the problems that the thickness of the sheath layer of the cable is uneven, the part of the sheath layer is possibly cut in an impermeable way, the part of the sheath layer is cut too deeply to hurt the inner wire core, and the problem of irregular outer circle of the cable is not considered, the thickness of the sheath layer is uneven, and the similar result is caused. The invention provides an automatic cutting device for an armored cable sheath layer, which can avoid the problems of impermeable cutting or too deep cutting caused by uneven thickness of the cable sheath layer and uneven outer circle of a cable.

In order to achieve the above object, the present invention provides the following technical solutions.

An automatic cutting device for an armoured cable sheath layer comprises a fixing device, a rotating device and a cutting device; the rotating device is positioned between the fixing device and the cutting device; the rotating device comprises a rotating seat; the cutting device comprises a limiting unit, a left friction roller, a right friction roller and a rotary cutter head; the limiting unit, the left friction roller, the right friction roller and the rotary cutter head are arranged on the inner side of the rotary seat; the left friction roller and the right friction roller are positioned at two sides of the rotary cutter head; the limiting unit comprises a plurality of limiting rods; the limiting rods are arranged on the inner side of the rotating seat, one of the limiting rods and the rotating cutter head are positioned on the same horizontal line, and the limiting rods are positioned on the inlet side of the steel tape armored cable; the rotary cutter head is located at the outlet side of the steel tape armored cable, and a ship-shaped hook head is arranged at one end, close to the steel tape armored cable, of the rotary cutter head.

As a further improvement of the invention, the rotary cutter head comprises a rotary cutter holder, a blade and a blade mounting frame; one end of the rotary knife rest is connected with the rotary seat through a knife rest telescopic device, and the other end of the rotary knife rest is connected with the blade mounting frame; the blade is placed in the middle cavity of the blade mounting frame, one end of the blade mounting frame, which is far away from the rotary tool rest, is provided with a notch, the notch is used for exposing the blade, and the front end of the notch is connected with a ship-shaped hook head.

As a further improvement of the invention, the tool bit telescoping device comprises a tool bit telescoping rod, a rotating motor and a center hole; the telescopic motor of tool bit telescopic link one end is installed in the inboard of roating seat through the tool rest, and the other end rotating electrical machines of tool bit telescopic link, rotating electrical machines set up the centre bore, and the centre bore is used for fixed revolving knife rest.

As a further improvement of the invention, the limiting rod comprises a telescopic rod, a connecting block and a ball seat; one end of the telescopic rod is arranged on the inner side of the rotating seat through a limiting rod telescopic motor, the other end of the telescopic rod is connected with the ball seat through a connecting block, a ball socket is arranged at the end of the ball seat, and balls are arranged in the ball socket.

As a further improvement of the invention, the ball head seat comprises a first ball head seat and a second ball head seat; the first ball seat and the second ball seat are oppositely arranged at two ends of the connecting block.

As a further improvement of the invention, the rotating seat comprises a rotating ring and a control box; the control box is located inside the rotating ring, an annular groove is formed in the outer side of the rotating ring, and the annular groove is arranged on an annular track in the fixing device.

As a further improvement of the invention, the rotating seat further comprises a telescopic motor; the telescopic motor comprises a tool rest telescopic motor, a friction roller telescopic motor and a limiting rod telescopic motor; the knife rest telescopic motor is positioned at the outlet side of the steel tape armored cable in the middle of the control box and is used for controlling telescopic movement of the rotary knife head; the friction roller telescopic motor comprises a left friction roller telescopic motor and a right friction roller telescopic motor, the left friction roller telescopic motor and the right friction roller telescopic motor are oppositely arranged at two sides of the tool rest telescopic motor, the left friction roller telescopic motor is used for controlling telescopic movement of the left friction roller, and the right friction roller telescopic motor is used for controlling telescopic movement of the right friction roller; the limiting rod telescopic motor is used for controlling telescopic movement of the limiting rod and comprises a first limiting rod telescopic motor, a second limiting rod telescopic motor, a third limiting rod telescopic motor and a fourth limiting rod telescopic motor; the first limiting rod telescopic motor, the second limiting rod telescopic motor, the third limiting rod telescopic motor and the fourth limiting rod telescopic motor are oppositely arranged on the cable inlet side of the rotating seat.

As a further improvement of the invention, the first stop lever telescopic motor is aligned with the tool rest telescopic motor in the axial direction of the rotating seat and is positioned at the cable inlet side in the middle of the control box.

As a further development of the invention, the swivel is an annular swivel.

An automatic cutting method for an armoured cable sheath layer comprises the following steps:

the steel tape armored cable is placed on the inner side of the rotating seat, and a plurality of limiting rods in the limiting unit fix the steel tape armored cable;

the left friction roller and the right friction roller are contacted with a cable sheath layer in the fixed steel tape armored cable to form an extrusion bulge;

the ship-shaped hook head is placed in the bulge, the rotary cutter head starts to work, and the cable sheath layer is separated and cut;

after the cable sheath layer reaches the preset cutting length, the steel tape armored cable stops feeding, the rotating cutter head circumferentially cuts the cable sheath layer for a circle, and the cut part and the cable sheath layer of the uncut part are cut off.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, through the mutual coordination among the fixing device, the rotating device and the cutting device, the cable is fixed through the limiting unit, the left friction roller and the right friction roller are contacted with the cable protection layer, then the ship-shaped hook head is adopted to hook the cable protection layer first and then cut, the inner surface of the cable protection layer is lifted and placed on the upper surface of the ship-shaped hook head with a certain height, the positions of the cutting edge and the cable protection layer in the depth direction are relatively fixed, and the problems of non-penetration cutting or deep cutting caused by uneven thickness of the cable protection layer and uneven outer circle of the steel tape armored cable can be avoided. Meanwhile, the ship-shaped hook head and the blade are not contacted with the steel tape armor layer, so that abrasion of the blade and the ship-shaped hook head can be reduced, and the service lives of the blade and the ship-shaped hook head are prolonged. When the cable is cut, the cutting of the cable sheath layer can be completed by one cutter, so that the equipment cost is reduced.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present invention, and are not particularly limited. In the drawings:

FIG. 1 is a schematic view of a steel tape armored cable;

fig. 2 is a general schematic diagram of an automatic cutting device for an armoured cable sheath layer according to the present invention;

fig. 3 is a schematic structural view of a fixing seat of the automatic cutting device for the sheath layer of the armored cable;

fig. 4 is a schematic structural view of a rotary seat of an automatic cutting device for an armoured cable sheath layer according to the present invention;

fig. 5 is a schematic structural view of a stop lever of an automatic cutting device for an armoured cable sheath layer according to the present invention;

fig. 6 is a schematic structural view of a friction roller of an automatic cutting device for an armoured cable sheath layer, wherein: a is an overall structural schematic diagram of the friction roller, and b is a partial detail diagram of the friction roller in the friction roller;

fig. 7 is a schematic structural view of a rotary cutter head of an automatic cutting device for an armoured cable sheath layer, wherein: a is a schematic diagram of the whole structure of the rotary cutter head; b is a schematic structural view of the blades in the rotary cutter head; c is a partial detail view of part A in the overall structural schematic of the rotary cutter head;

fig. 8 is a schematic structural view of a tool bit telescoping device of the automatic cutting device for the sheath layer of the armored cable;

fig. 9 is a schematic diagram of a bulge generated during operation of the automatic cutting device for the sheath layer of the armored cable according to the present invention;

fig. 10 is a schematic view showing a position between a boat-shaped hook head and a bulge of an automatic cutting device for an armoured cable sheath layer according to the present invention;

fig. 11 is a schematic view showing a partial detail of a position between a boat-shaped hook head and a bulge of an automatic cutting device for a sheath layer of an armored cable;

fig. 12 is a schematic view of a slit formed after cutting by the automatic cutting device for the sheath layer of the armored cable.

In the figure: 1 is a fixed seat; 11 is a track; 12 is a fixed supporting seat; 2 is a rotating seat; 21 is a rotating ring; 211 is a control box, 212 is an annular groove, 22 is a tool rest telescopic motor, 23 is a left friction roller telescopic motor, 24 is a right friction roller telescopic motor, 25 is a first limit rod telescopic motor, 26 is a second limit rod telescopic motor, 27 is a third limit rod telescopic motor, 28 is a fourth limit rod telescopic motor, 291 is a first limit rod; 292 is a second stop bar; 293 is a third stop lever; 294 is a fourth stop lever; 3 is a steel tape armoured cable; 31 is a cable jacket layer; 311 is a bulge; 312 is an annular kerf; 313 is a spiral kerf; 32 is a steel tape armor layer; 33 is a cable liner; 34 is a copper tape shielding layer; 35 is a cable insulation layer; 36 is the cable core; 41 is a telescopic rod; 42 is a connecting block; 43 is a first ball socket; 44 is a first ball; 45 is a second ball socket; 46 is a second ball; 5 is a left friction roller; 51 is a friction roller telescopic rod; 52 is a friction roller mounting bracket; 53 is a motor; 54 is a friction roller; 541 is a groove; 554 is a left friction roller; 6 is a rotary cutter head; reference numeral 61 denotes a rotary knife rest; 611 is a notch; 612 is a boat-shaped hook head; 62 is a blade; 621 is a blade; 622 is an installation slot; 63 is a blade fixing button; 64 is a blade mount; 65 is a cutter head connecting handle; 66 hexagonal chuck; 7 is a knife rest telescoping device; 71 is a cutter head telescopic rod; 72 is a rotating electrical machine; 73 is a central hole; 8 is a right friction roller; 854 is a right friction roller.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, shall fall within the scope of the invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Noun interpretation:

armored cable: the armoured cable is made of a flexible solid combination of conductors of different materials encased in a metal sleeve of insulating material.

Steel tape armor: the metal sleeve of the cable is formed by spirally winding a thin steel strip; the metal protective layer of the armored cable can increase the mechanical strength of the cable, improve the anti-erosion capability and prevent the rat bite.

As shown in fig. 1, the steel tape armored cable 3 includes a cable sheath layer 31, a steel tape armor layer 32, a cable inner liner layer 33, a copper tape shield layer 34, a cable insulation layer 35, and a cable core 36. The cable jacket layer 31 and inner liner 33 materials are typically polyvinyl chloride.

The invention provides an automatic cutting device for a steel tape armored cable sheath layer, which comprises a fixing device, a rotating device and a cutting device. The device can realize automatic cutting of the cable sheath layer 31 and automatic cutting of the cable inner liner layer 33 after the steel tape armor layer 32 is stripped.

As shown in fig. 2, the rotating means is located between the fixing means and the cutting means.

The fixing device comprises a fixing seat 1; the spin-on device comprises a rotating seat 2; the cutting device comprises a limiting unit, a friction roller, a rotary cutter head 6 and a cutter rest telescoping device 7.

The inboard of fixing base 1 is provided with roating seat 2, and roating seat 2 is annular roating seat. A limiting rod, a friction roller and a knife rest telescoping device 7 are fixedly arranged on the inner side of the rotating seat 2; the friction roller comprises a left friction roller 5 and a right friction roller 8, and the left friction roller 5 and the right friction roller 8 are positioned at two sides of the tool rest telescoping device 7; the limiting unit comprises a first limiting rod 291, a second limiting rod 292, a third limiting rod 293 and a fourth limiting rod 294, wherein the first limiting rod 291, the second limiting rod 292, the third limiting rod 293 and the fourth limiting rod 294 are arranged on the inner side of the rotating seat 2 at equal intervals, the first limiting rod 291 and the tool rest telescoping device 7 are positioned on the same horizontal line, and the horizontal plane is perpendicular to the cross section of the rotating seat 2. The knife rest telescoping device 7 is provided with a rotary knife head 6. Thereby realizing automatic cutting of the cable sheath layer 31 in the steel tape-armored cable 3.

As shown in fig. 3, the fixing base 1 includes a rail 11 and a fixing support 12. The track 11 is annular, and the outside of track 11 carries out fixed connection with fixed support seat 12. The inner side of the rail 11 is matched with the rotating seat 2 to provide support for the rotating device. The fixed supporting seat 12 is used for being connected with the main body of the equipment, and the motor and the gear set arranged in the fixed supporting seat 12 are used for driving the rotating seat 2 to rotate.

As shown in fig. 4, the rotary base 2 includes a rotary ring 21, a control box 211, an annular groove 212, and a telescopic motor.

The swivel ring 21 is a main body part of the swivel base 2 and provides support for the motor equipment to be installed. The control box 211 is located inside the rotating ring 21, and the control elements of the motors are installed inside the control box 211. The outside of the rotary ring 21 is provided with an annular groove 212, and the annular groove 212 is matched with the annular rail 11 on the fixed seat 1, so that the rotary seat 2 can perform rotary motion on the annular rail 11 under the control of a driving motor.

The telescopic motor is used for controlling the central rod arranged on the telescopic motor to move in a telescopic way along the radial direction. The telescopic motor comprises a tool rest telescopic motor 22, a friction roller telescopic motor and a limiting rod telescopic motor. The friction roller telescopic motor explosion comprises a left friction roller telescopic motor 23 and a right friction roller telescopic motor 24. The stop lever telescopic motor comprises a first stop lever telescopic motor 25, a second stop lever telescopic motor 26, a third stop lever telescopic motor 27 and a fourth stop lever telescopic motor 28.

The carriage extension motor 22 is located at the outlet side of the steel-tape-armored cable 3 in the middle of the control box 211 and is used for controlling the carriage extension device 7 to extend and retract along the radial direction so that the carriage approaches or is far away from the steel-tape-armored cable 3. The left friction roller telescopic motor 23 and the right friction roller telescopic motor 24 are symmetrically arranged at two sides of the tool rest telescopic motor 22 and form a certain angle. The left friction roller telescopic motor 23 controls the left friction roller 5 to be close to or far away from the steel armored cable 3, and the right friction roller telescopic motor 24 controls the right friction roller 8 to be close to or far away from the steel armored cable 3. The first stop lever telescopic motor 25, the second stop lever telescopic motor 26, the third stop lever telescopic motor 27 and the fourth stop lever telescopic motor 28 are uniformly arranged on the inlet side of the steel tape armored cable 3 of the rotating seat 2, wherein the first stop lever telescopic motor 25 is aligned with the knife rest telescopic motor 22 in the axial direction of the rotating seat 2 and positioned on the cable inlet side in the middle of the control box 211, and when the rotating knife head 6 hooks the cable sheath layer 31, the first stop lever telescopic motor 25 controls the first stop lever 291 to prop against the steel tape armored cable 3, so that the position of the steel tape armored cable 3 is prevented from deviating from the central axis. The second stop lever telescopic motor 26 controls the second stop lever 292 to approach or depart from the steel tape armoured cable 3; the third limiting rod telescopic motor 27 controls the third limiting rod 293 to approach or depart from the steel tape armored cable 3; the fourth stop lever telescoping motor 28 controls the fourth stop lever 294 toward or away from the steel armored cable 3.

As shown in fig. 5, the structure of the stopper rod includes a telescopic rod 41, a connection block 42, a ball seat, and balls.

The telescopic rod 41 is matched with a limiting rod telescopic motor and moves along the radial direction under the control of the limiting rod telescopic motor. The telescopic rod 41 is connected to the ball seat via a connection block 42. The end of the ball seat is provided with a ball socket, and a ball is arranged in the ball socket.

The head mount includes a first head mount 43 and a second head mount 45. The first ball seat 43 and the second ball seat 45 are cylindrical and symmetrically arranged at two ends of the connecting block 42. When the telescopic motor of the limiting rod is in operation, the limiting rod is controlled to move radially, and after the balls contact the cable sheath layer 31, the telescopic motor of the limiting rod stops moving.

Four groups of balls in the first limit rod 291, the second limit rod 292, the third limit rod 293 and the fourth limit rod 294 are propped against the steel-tape-armored cable 3 from four directions, so that the steel-tape-armored cable 3 is limited at the axial center position. Meanwhile, each ball can roll on the surface of the steel tape armored cable 3, and the feeding motion of the steel tape armored cable 3 along the axis and the rotation motion of the limiting rod around the axis are not affected.

The ball that gag lever post end and steel tape armoured cable 3 contact can also replace with the gyro wheel, can accomplish spacing purpose equally.

As shown in fig. 6, the friction roller includes a friction roller telescopic rod 51, a friction roller mounting bracket 52, a motor 53, and a friction roller 54. The friction roller telescopic rod 51 is matched with a friction roller telescopic motor, and is driven by the friction roller telescopic motor to move along the radial direction. The friction roller mounting frame 52 is mounted on the end of the friction roller expansion link 51 for fixing the friction roller 54. The friction roller mounting frame 52 incorporates a gear set for driving the friction roller 54. The motor 53 is mounted semi-embedded on the side of the friction roller mounting frame 52 for driving the gear set. The friction roller 54 is a cylindrical roller, and the surface of the friction roller 54 is provided with grooves 541 in the axial direction for increasing friction force when in contact with the cable sheath layer 31.

As shown in fig. 7, the rotary cutter head 6 includes a rotary cutter holder 61, a blade 62, and a blade mount 64. The rotary cutter 6 is used to cut the cable sheath 31.

The rotating blade holder 61 is connected to a blade mount 64, and the blade 62 is mounted in the blade mount 64.

One end of the rotary tool holder 61 is provided with a hexagonal chuck 66, and the hexagonal chuck 66 is used for matching with a rotary motor 72 on the tool holder telescoping device 7, so that the rotary motor 72 can control the direction of rotation of the rotary tool bit 6. The other end of the rotary blade holder 61 is provided with a blade attachment shank 65, the blade attachment shank 65 is cylindrical, and the blade attachment shank 65 is used for attaching a blade mounting bracket 64. The blade mount 64 is a trapezoidal sheet-like blade mount, and the blade-head connecting handle 65 is connected to one oblique side of the blade mount 64 so that the long side of the trapezoid faces the cutting edge 621 of the blade 62. The blade mount 64 is hollow in construction with a central cavity for mounting the blade 62. The blade mount 64 is provided with an elongated window near the front edge of the blade 62 to ensure that a worker can conveniently finger grip the blade 62 when changing the blade 62. The lower portion of the blade mount 64 defines a notch 611, the notch 611 being configured to expose the blade 62 to the blade edge 621. The notch 611 is inverted hook-shaped, and the edge surface of the notch 611 is V-shaped to prop open the cut cable sheath layer 31. The lowest end of the notch 611 in the blade mounting bracket 64 is provided with a boat-shaped hook head 612, and the front part of the boat-shaped hook head 612 is arc-shaped, and the front edge is thin, the rear part is wide and smoothly transits, so that the boat-shaped hook head can conveniently pass under the cable sheath layer 31. The boat-shaped hook head 612 has a thickness greater than that of the blade mounting bracket 64, and two platforms are formed at both sides of the end of the blade mounting bracket 64 near the boat-shaped hook head 612 to facilitate hooking the cable sheath layer 31 before the blade 621 cuts the cable sheath layer 31. The leading edge of the boat-shaped hook head 612 is disposed further forward than the blade 621, and the boat-shaped hook head 612 contacts the cable sheath 31 before the blade 621 and is interposed between the cable sheath 31 and the steel tape sheath 32.

The blade 62 is mounted in a pocket in the middle of the blade mount 64. The pocket is open at the bottom and the blade 62 can slide in and out of the bottom opening. The blade 62 has a trapezoidal main body, a front portion provided with a blade edge 621, and a back portion provided with two mounting detents 622. The mounting slot 622 may cooperate with the blade securing knob 63 to mount the blade 62 to the blade mount 64.

The front of the blade fixing button 63 is provided with a semicircular blade locking block to be engaged with the mounting catching groove 622 on the back of the blade 62. When the fixing button 63 is pressed, the blade locking block is staggered with the mounting clamping groove 622 on the blade 62, and the blade 62 is unlocked and can slide out from the lower part of the blade mounting frame 64. When the blade fixing knob 63 is released, the fixing knob is reset against the reed provided at the back. When the blade 62 is mounted, the blade fixing button 63 is pressed first, the blade 62 is inserted from below the blade mounting frame 64, the blade fixing button 63 is released, and the blade locking block is clamped into the mounting clamping groove at the back of the blade 62 to fix the blade 62.

The blade mounting frame 64 is a trapezoid blade mounting frame, the blade 62 is arranged in the blade mounting frame 64, only the sharp cutting edge 621 of the blade 62 is leaked, the action of the sharp cutting edge 621 of the blade 62 is exerted, and the defect that the blade 62 is insufficient in strength and easy to break is avoided. And meanwhile, the blade 62 is convenient to replace, and the use cost is low.

As shown in fig. 8, the bit expansion device 7 includes a bit expansion rod 71, a rotary motor 72, and a center hole 73. One end of the rotary motor 72 is provided with a center hole 73, and the other end of the rotary motor 72 is connected to the bit expansion link 71.

The tool bit telescoping rod 71 cooperates with the tool post telescoping motor 22 for controlling the telescoping movement of the rotary tool bit 6 in a radial direction to move the rotary tool bit 6 toward or away from the on-axis steel armored cable 3. The center hole 73 is connected to the bit shank 65 by the hexagonal chuck 66. Thereby realizing control of the rotary motor 72 to the knife edge direction of the rotary cutter head 6.

When the steel tape armored cable 3 is fed to the central position of the device, the first limiting rod telescopic motor 25, the second limiting rod telescopic motor 26, the third limiting rod telescopic motor 26 and the fourth limiting rod telescopic motor 28 simultaneously control the limiting rods to move towards the center along four directions respectively. The first ball 44 and the second ball 46 of the stopper rod head stop moving after contacting the cable jacket layer 31. The four limiting rods are propped against the steel tape armored cable 3 from four directions, and the steel tape armored cable 3 is limited at the center of the device. Meanwhile, the balls are in contact with the steel tape armored cable 3, so that the steel tape armored cable 3 can perform feeding or retreating movement. The limiting rod and the rotating seat 2 can rotate around the steel tape armored cable 3, and the limiting effect of the steel tape armored cable 3, which is always close to the limiting rod, is always kept at the center of the device during rotation.

After the position of the steel tape armored cable 3 is fixed by the limiting rod, the left friction roller telescopic motor 23 and the right friction roller telescopic motor 24 respectively control the left friction roller 5 and the right friction roller 8 to move towards the center at the same time. As shown in fig. 9, after the left and right frictional rollers 554 and 854 contact the cable sheath 31, the left and right frictional rollers 5 and 8 stop moving toward the center, but the left and right frictional rollers 554 and 854 need to be maintained at a certain contact pressure with the cable sheath 31. The left friction roller 554 rotates counterclockwise, the right friction roller 854 rotates clockwise, and the cable sheath 31 contacting the left friction roller 554 and the right friction roller 854 at the end of the steel tape armored cable 3 is rubbed with the cable sheath 31 to form a bulge 311.

As shown in fig. 10, the bulge 311 is formed by separating the cable sheath 31 from the steel tape armor 32. At this time, the rotary cutter head 6 is lowered and the steel armored cable 3 is fed forward, and the boat-shaped hook head 612 is inserted into the cavity of the bulge 311.

After the boat-shaped hook 612 is inserted into the cavity of the bulge 311, the left friction roller 5 and the right friction roller 8 are retracted under the control of the left friction roller telescopic motor 23 and the right friction roller telescopic motor 24, and are out of contact with the cable sheath 31. As shown in fig. 11, after the boat-shaped hook 612 is inserted into the cavity of the bulge 311, the boat-shaped hook moves in a direction away from the steel-tape armored cable 3, and lifts the cable sheath 31, so that the cable sheath 31 around the boat-shaped hook 612 is separated from the steel-tape armored layer 32, and a certain gap is maintained between the bottom of the boat-shaped hook 612 and the steel-tape armored layer 32.

After the ship-shaped hook head 612 lifts the cable sheath 31, the steel tape armored cable 3 starts to move in a feeding mode, and the rotating seat 2 drives the rotating cutter head 6 to rotate around the steel tape armored cable 3. The feed movement of the steel armored cable 3 and the rotary movement of the rotary cutter head 6 are combined into a helical movement of the rotary cutter head 6 relative to the cable sheath 31. Based on the feed speed of the steel armored cable 3 and the rotational speed of the rotary cutter head 6, the control system controls the rotary cutter head 6 to a proper angle through the rotary motor 72 to start cutting the cable sheath 31. The rotary cutter head leaves a slit in the cable sheath 31 in the form of a spiral, such as spiral slit 313 in fig. 12. When the desired cut length is reached, the rotary cutter head 6 continues to rotate around the steel-tape-armored cable 3 for one revolution to form an annular slit 312 to completely disconnect the cut portion from the uncut portion of the cable sheath 31, in order to stop the feeding movement of the steel-tape-armored cable 3.

After the cable sheath 31 is cut off by rotating the rotary cutter head 6 once, the steel tape armoured cable 3 is retracted a distance, and the boat-shaped hook 612 is pulled out from under the cable sheath 31. The rotary cutter head 6 is retracted and reset. The cutting of the cable sheath 31 is completed, forming a spiral ribbon of cable sheath 31 scrap.

The annular guide rail and the annular rotating seat can be replaced by an annular guide rail and star wheel scheme.

In summary, the invention provides an automatic cutting device for an armored cable sheath layer, which aims to solve the problem that the automation degree of the cutting process of the cable sheath layer 31 is not high. According to the invention, a pair of friction rollers with opposite rotation directions are contacted with a cable sheath layer 31 at the end of a steel tape armored cable 3, and the cable sheath layer 31 which is originally cylindrical is extruded into a bulge 311 by friction between the friction rollers and the cable sheath layer 31, and the bulge 311 is formed by separating the cable sheath layer 31 from the steel tape armored layer 32. The blade carrier hook portion with the boat hook 612 is inserted into the cavity of the bulge 311 formed at the end of the steel armored cable 3. The blade carrier hooks of the boat hook 612 move radially outwardly along the end face of the steel tape armored cable 3 to hook up the cable sheath 31 and separate it from the steel tape armor 32. The axial feed movement of the steel armored cable 3 and the circumferential movement of the rotating blade carrier 61 perpendicular to the axis of the steel armored cable 3 are combined into a helical movement of the rotating blade carrier 61 relative to the cable sheath 31. Inside the rotating blade carrier 61 a blade 621 is provided, which blade 621 leaves a spiral slit 313 in the cable sheath layer 31. After the preset cutting length is reached, the steel armored cable 3 stops the feeding movement, and the rotary knife rest 61 alone performs the circumferential movement for one circle. An annular slit 312 is formed in the cable sheath 31 perpendicular to the cable axis to completely sever the cable sheath 31 between the cut and uncut portions. The cut portion of the cable jacket 31 eventually forms a spiral strip that wraps around the exterior of the cable armor for further processing.

The automatic cutting device for the sheath layer of the armored cable can also be used for cutting and separating the inner liner layer 33 of the cable.

A second object of the present invention is to provide an automatic cutting method of an armored cable, the method comprising:

the left friction roller 554 and the right friction roller 854 contact with the cable sheath layer 31 at the end of the steel tape armored cable 3, and the cable sheath layer 31 which is originally cylindrical is extruded into one bulge 311 by friction between the left friction roller 554 and the right friction roller 854 and the cable sheath layer 31.

The boat-shaped hook 612 is inserted into the bulge 311.

The boat hook 612 moves radially outwardly along the end face of the steel strip armored cable 3 to hook up the cable sheath 31 and separate it from the steel strip armor 32.

The axial feed movement of the steel armored cable 3 and the circumferential movement of the rotating blade carrier 61 perpendicular to the axis of the steel armored cable 3 are combined into a helical movement of the rotating blade carrier 61 relative to the cable sheath 31. The inner side of the boat-shaped hook head 612 is provided with a blade 621, the blade 621 leaving a spiral slit 313 in the cable sheath layer 31.

After the preset cutting length is reached, the steel armored cable 3 stops the feeding movement, and the rotary knife rest 61 alone performs the circumferential movement for one circle. An annular slit 312 is formed in the cable sheath 31 perpendicular to the axis of the steel strip-armored cable 3 to completely cut the cable sheath 31 between the cut and uncut portions.

The cut portion of the cable sheath 31 is eventually formed into a helical strip that is wrapped around the outer side of the steel armor layer 32.

The invention adopts the method that the ship-shaped hook head 612 hooks the cable sheath layer 31 firstly and then cuts, lifts the inner surface of the cable sheath layer 31 on the upper surface of the ship-shaped hook head 612 with a certain height, and the positions of the blade 621 and the cable sheath layer 31 in the depth direction are relatively fixed, so that the problems of non-penetration cutting or deep cutting caused by uneven thickness of the cable sheath layer 31 and uneven outer circle of the steel tape armored cable 3 can be avoided. At the same time, neither the boat hook 612 nor the blade 62 is in contact with the steel armor 32, thereby reducing wear of the blade 62 and boat hook 612 and extending the useful life of the blade 62 and boat hook 612.

The steel tape armoured cable 3 is fed and the cutter head is rotated to form a spiral cutting method, and the cable sheath layer 31 can be cut by only one cutter. The usual automatic cutting solutions all require two knives, one for slitting along the cable axis and one for cutting perpendicular to the cable axis. The equipment cost is reduced.

Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated herein by reference for the purpose of completeness. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to forego such subject matter, nor should the applicant be deemed to have such subject matter not considered to be part of the disclosed subject matter.

The foregoing is a further elaboration of the present invention, and it is not intended that the invention be limited to the specific embodiments shown, but rather that a number of simple deductions or substitutions be made by one of ordinary skill in the art without departing from the spirit of the invention, all shall be deemed to fall within the scope of the invention as defined by the claims which are filed herewith.

Claims (10)

1. An automatic cutting device for an armoured cable sheath layer is characterized by comprising a fixing device, a rotating device and a cutting device;

the rotating device is positioned between the fixing device and the cutting device;

the rotating device comprises a rotating seat (2);

the cutting device comprises a limiting unit, a left friction roller (5), a right friction roller (8) and a rotary cutter head (6);

the limiting unit, the left friction roller (5), the right friction roller (8) and the rotary cutter head (6) are arranged on the inner side of the rotary seat (2);

the left friction roller (5) and the right friction roller (8) are positioned at two sides of the rotary cutter head (6);

the limiting unit comprises a plurality of limiting rods;

the limiting rods are arranged on the inner side of the rotating seat (2), one of the limiting rods and the rotating cutter head (6) are positioned on the same horizontal line, and the limiting rods are positioned on the inlet side of the steel tape armored cable (3);

the rotary cutter head (6) is positioned at the outlet side of the steel tape armored cable (3), and a ship-shaped hook head (612) is arranged at one end, close to the steel tape armored cable (3), of the rotary cutter head (6).

2. An automatic cutting device for armoured cable jackets according to claim 1, characterized in that the rotary cutter head (6) comprises a rotary cutter head (61), a blade (62) and a blade mounting bracket (64);

one end of the rotary knife rest (61) is connected with the rotary seat (2) through the knife rest telescopic device (7), and the other end of the rotary knife rest (61) is connected with the knife rest mounting rack (64);

the blade (62) is placed in the middle cavity of the blade mounting frame (64), one end of the blade mounting frame (64) far away from the rotary tool rest (61) is provided with a notch (611), the notch (611) is used for exposing the blade (62) to the blade (621), and the front end of the notch (611) is connected with a boat-shaped hook head (612).

3. An automatic cutting device for the sheath of an armored cable according to claim 2, wherein the tool bit telescoping device (7) comprises a tool bit telescoping rod (71), a rotating motor (72) and a central hole (73);

one end of the tool bit telescopic rod (71) is arranged on the inner side of the rotary seat (2) through the tool rest telescopic motor (22), the other end of the tool bit telescopic rod (71) is provided with a rotary motor (72), the rotary motor (72) is provided with a central hole (73), and the central hole (73) is used for fixing the rotary tool rest (61).

4. The automatic cutting device for the sheath layer of the armored cable according to claim 1, wherein the limiting rod comprises a telescopic rod (41), a connecting block (42) and a ball seat;

one end of the telescopic rod (41) is installed on the inner side of the rotating seat (2) through a limiting rod telescopic motor, the other end of the telescopic rod (41) is connected with the ball seat through a connecting block (42), a ball socket is arranged at the end of the ball seat, and balls are arranged in the ball socket.

5. The automatic cutting device for the sheath of the armored cable according to claim 4, wherein the ball head seat comprises a first ball head seat (43) and a second ball head seat (45);

the first ball seat (43) and the second ball seat (45) are oppositely arranged at two ends of the connecting block (42).

6. An automatic cutting device for the sheath of an armored cable according to claim 1, characterized in that the rotating seat (2) comprises a rotating ring (21) and a control box (211);

the control box (211) is positioned at the inner side of the rotary ring (21), an annular groove (212) is arranged at the outer side of the rotary ring (21), and the annular groove (212) is arranged on the annular track (11) in the fixing device.

7. An automatic cutting device for the sheath of an armoured cable according to claim 6, characterized in that the rotating seat (2) further comprises a telescopic motor;

the telescopic motor comprises a tool rest telescopic motor (22), a friction roller telescopic motor and a limiting rod telescopic motor;

the cutter rest telescopic motor (22) is positioned at the outlet side of the steel tape armored cable (3) in the middle of the control box (211) and is used for controlling telescopic movement of the rotary cutter head (6);

the friction roller telescopic motor comprises a left friction roller telescopic motor (23) and a right friction roller telescopic motor (24), the left friction roller telescopic motor (23) and the right friction roller telescopic motor (24) are oppositely arranged on two sides of the tool rest telescopic motor (22), the left friction roller telescopic motor (23) is used for controlling telescopic movement of the left friction roller (5), and the right friction roller telescopic motor (24) is used for controlling telescopic movement of the right friction roller (8);

the limiting rod telescopic motor is used for controlling telescopic movement of the limiting rod and comprises a first limiting rod telescopic motor (25), a second limiting rod telescopic motor (26), a third limiting rod telescopic motor (27) and a fourth limiting rod telescopic motor (28);

the first limiting rod telescopic motor (25), the second limiting rod telescopic motor (26), the third limiting rod telescopic motor (27) and the fourth limiting rod telescopic motor (28) are oppositely arranged on the cable inlet side of the rotating seat (2).

8. An armoured cable sheath automatic cutting device according to claim 7, characterized in that the first stop lever telescopic motor (25) is aligned with the carriage telescopic motor (22) in the axial direction of the swivel (2), at the cable entry side in the middle of the control box (211).

9. An automatic cutting device for the sheath of an armoured cable according to claim 1, characterized in that the rotating seat (2) is an annular rotating seat.

10. An automatic cutting method for an armored cable sheath layer is characterized by comprising the following steps:

the steel tape armored cable (3) is placed on the inner side of the rotating seat (2), and a plurality of limiting rods in the limiting unit fix the steel tape armored cable (3);

the left friction roller (5) and the right friction roller (8) are contacted with a cable sheath layer (31) in the fixed steel tape armored cable (3) to form an extrusion bulge (311);

the boat-shaped hook head (612) is placed in the bulge (311), the rotary tool bit (6) starts to work, and the cable sheath layer (31) is separated and cut;

after the cable sheath layer (31) reaches the preset cutting length, the steel tape armored cable (3) stops feeding, the rotary cutter head (6) circumferentially cuts the cable sheath layer (31) for a circle, and the cut part and the cable sheath layer (31) of the uncut part are cut off.