Wire unwinding mechanism

Abstract

The utility model relates to the technical field of wire processing, and specifically to a wire unwinding mechanism, comprising a machine body, a driving device, a positioning roller, and a conveying roller. The conveying roller adopts a pair of roller structures, and the pair of roller structures comprises an upper roller wheel and a lower roller wheel which are arranged on the machine body and are symmetrical to each other. The driving device comprises a first motor group for driving the positioning roller, a second motor group for driving the upper roller wheel, and a third motor group for driving the lower roller wheel; and also comprises an anti-locking component for preventing the first motor group from being locked. The anti-locking component comprises a through hole opened on the machine body, an anti-locking rod rotatably connected to an end of the positioning roller away from the machine body, a sensing element fixedly arranged on the top of the through hole, and a controller electrically connected to the sensing element and the driving device respectively, and the other end of the anti-locking rod which is not rotatably connected is inserted into the through hole and can be fitted with the sensing element. The scheme can solve the technical problem of insufficient production efficiency when using the existing unwinding mechanism to unwind large-diameter wires.

Description

Technical Field

[0001] The utility model relates to the technical field of wire material processing, in particular to a wire material unwinding mechanism. Background Art

[0002] The unwinding mechanism generally refers to a special device used to level metal sheets, but in actual application, the unwinding mechanism is also used to pack flexible metal wires into coils. The unwinding mechanism includes a body, a driving device, a positioning roller, and a conveying roller. The body is generally a welded box-shaped structure. The driving device includes a motor that cooperates with a gear box to reduce speed to provide the main power for the positioning roller. The wire is unwound on the surface of the positioning roller to form a coil, and the wire raw material is conveyed to the positioning roller by the driven conveying roller. When the unwinding mechanism is used to pack the coiled wire to form a coil, due to the different diameters of the wire itself, when unwinding large-diameter wires, since large-diameter wires are heavier and more resistant to bending, relying solely on the motor on the positioning roller to provide the main power will not provide sufficient power for the entire mechanism. When using the existing unwinding mechanism to unwind large-diameter wires, it is more difficult, and the problem of insufficient production efficiency needs to be solved urgently. Utility Model Content

[0003] The utility model provides a wire unwinding mechanism, which can solve the technical problem of insufficient production efficiency when using the existing unwinding mechanism to unwind wires with large diameters.

[0004] This application provides the following technical solutions:

[0005] A wire unwinding mechanism comprises a machine body, a driving device, a positioning roller, and a conveying roller. The conveying roller adopts a pair of rollers, and the pair of rollers comprises an upper roller and a lower roller which are arranged on the machine body and are symmetrical to each other. The driving device comprises a first motor group for driving the positioning roller, a second motor group for driving the upper roller, and a third motor group for driving the lower roller; and also comprises an anti-lock component for preventing the first motor group from locking. The anti-lock component comprises a through hole opened on the machine body, an anti-lock rod rotatably connected to one end of the positioning roller away from the machine body, an induction element fixedly arranged on the top of the through hole, and a controller electrically connected to the induction element and the driving device respectively, and the other end of the anti-lock rod which is not rotatably connected is inserted into the through hole and can fit with the induction element.

[0006] Beneficial effects:

[0007] 1. Different from the solution in the prior art that uses a single motor group to generate driving force only for the positioning roller, by setting a first motor group for driving the positioning roller, a second motor group for driving the upper roller, and a third motor group for driving the lower roller, the first motor group, the second motor group, and the third motor group are independent of each other and can respectively give corresponding main driving forces to the positioning roller, the upper roller, and the lower roller. The superposition of the main driving forces makes this solution appear to be at ease when unwinding large-diameter wires, and there will be no problem of insufficient power, which is conducive to ensuring that production efficiency is maintained at a high level.

[0008] 2. In actual use, when the second motor group and the third motor group used to drive the conveying roller fail, or when the rotation speed of the positioning roller exceeds that of the conveying roller, the diameter of the coiled wire on the positioning roller begins to shrink. If the wire is completely wrapped around the surface of the positioning roller and the subsequent conveying roller cannot keep up with the speed of supplying the wire raw material, it will directly cause the first motor group to lock. The anti-lock component of this solution has an anti-lock effect. The specific process is: when the coiled wire hanging on the positioning roller shrinks to squeeze the bottom of the anti-lock rod, the anti-lock rod rotates to contact the sensing element, so that the sensing element generates an electrical signal to feedback to the controller, so that the controller controls the driving device to make corresponding adjustments to the rotation speeds of the positioning roller, the upper roller, and the lower roller to avoid complete locking, thereby ensuring the smooth continuation of the unwinding process.

[0009] Furthermore, as an improvement, the sensing element is a travel switch.

[0010] Beneficial effects: When the anti-lock rod rotates to contact the travel switch, the circuit inside the travel switch is connected and an electrical signal is generated to be fed back to the controller. The travel switch can realize automatic control of the unwinding mechanism. It is characterized by reliable operation, long service life, low power consumption, high repositioning accuracy, high operating frequency and the ability to adapt to harsh working environments. As long as the pressure of the anti-lock rod reaches a certain value, it will respond in time to improve the production efficiency and safety of the unwinding process.

[0011] Furthermore, as an improvement, the sensing element is a pressure sensor.

[0012] Beneficial effect: As a sensing electronic component, the pressure sensor is characterized by its ability to sense changes in pressure. By selecting the pressure sensor as the sensing element and cooperating with the algorithm logic control of the controller, the controller will adjust the speed of the positioning roller and other parts only when the pressure sensor senses the continuous pressure increase from the anti-lock bar, preventing the release of erroneous locking signals to the controller due to accidental contact of the anti-lock bar or only one contact, thereby avoiding adverse effects on the work efficiency of the unwinding process.

[0013] Furthermore, as an improvement, the anti-lock rod is a straight rod, and a contact portion is provided on one end of the anti-lock rod near the through hole. When the anti-lock rod rotates to contact the sensing element, the contact portion is completely fitted with the bottom of the sensing element.

[0014] Beneficial effect: The function of the contact portion is to form a face-to-face contact when the anti-lock rod contacts the sensing end of the sensing element, thereby reducing the pressure acting on the sensing element by increasing the contact area, thereby reducing damage to the sensing end of the sensing element.

[0015] Further, as an improvement, a buffer roller is arranged on the machine body above the positioning roller.

[0016] Beneficial effect: If the diameter of the coil formed by the rolled wire is large, it is easy to cause knotting problems when the wire is directly fed from the conveying roller to the positioning roller. By arranging a buffer roller above the positioning roller, such problems can be avoided by feeding the wire from the buffer roller at a higher position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an axonometric view of a first embodiment of a wire unwinding mechanism of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of some structures in the A direction;

[0019] Figure 3 for Figure 2 The enlarged schematic diagram of point B in the middle;

[0020] Figure 4 The corresponding example in the first comparative example of the present utility model Figure 3 An enlarged schematic diagram of . DETAILED DESCRIPTION

[0021] The following is further described in detail through specific implementation methods:

[0022] The marks in the drawings of the specification include: body 1, base 2, support frame 21, fixing plate 22, groove 23, positioning roller 3, first bearing group 31, second bearing group 32, upper roller 4, lower roller 5, anti-lock component 6, through hole 61, anti-lock rod 62, sensing element 63, contact part 64, buffer roller 7, shell 71, coil 8.

[0023] Embodiment 1

[0024] Combination Figure 1-Figure 3As shown, a wire unwinding mechanism includes a machine body 1, a base 2, a driving device, a positioning roller 3, and a conveying roller, wherein the conveying roller adopts a double roller structure, and the double roller structure includes an upper roller 4 and a lower roller 5 which are arranged on the machine body 1 and are symmetrical to each other. In this embodiment, two groups of double roller structures are arranged.

[0025] The driving device includes a first motor group for driving the positioning roller 3, a second motor group for driving the upper roller 4, and a third motor group for driving the lower roller 5. The motor groups involved in this embodiment all use variable frequency motors to provide power after being decelerated by a gear box. This is the prior art and will not be described in detail.

[0026] The body 1 and the base 2 are fixed by bolts. The base 2 includes a support frame 21 and a fixing plate 22 welded and fixed to the bottom of the support frame 21. The entire body 1 is fixed by driving ground nails into the fixing plate 22 and the ground. A groove 23 for accommodating the rolled coil 8 is excavated in advance on the ground. The unwinding mechanism in the prior art is usually designed to be higher in order to prevent the rolled coil 8 from directly contacting the ground. In addition to increasing the manufacturing cost, the design of increasing the height of the positioning roller 3 and the body 1 will also have the problem of an insufficiently compact structure inside the body 1. This embodiment provides sufficient longitudinal space for accommodating the rolled coil 8 by excavating a groove 23 on the ground.

[0027] The positioning roller 3 is rotatably connected to the machine body 1 through a first bearing group 31 and a second bearing group 32 fixedly connected to the machine body 1. The first bearing group 31 and the second bearing group 32 both include bearings and bearing seats, wherein the bearing seat of the first bearing group 31 is fixed to the machine body 1 by screws, and the bearing seat of the second bearing group 32 is an L-shaped structure as a whole.

[0028] The anti-lock assembly 6 is also included for preventing the first motor group from locking. The anti-lock assembly 6 includes a through hole 61, an anti-lock rod 62, a sensing element 63 fixedly arranged at the top of the through hole 61, and a controller electrically connected to the sensing element 63 and the variable frequency motors in the first motor group, the second motor group, and the third motor group; the through hole 61 is arranged at a position below the bearing seat of the second bearing group 32 on the body 1, and the cross-section of the through hole 61 is rectangular; in this embodiment, the anti-lock rod 62 is a straight rod, one end of the anti-lock rod 62 is hinged to the end of the positioning roller 3 away from the body 1, and the other end of the anti-lock rod 62, i.e., the end close to the through hole 61, is provided with a contact portion 64, which is an inclined surface provided on the anti-lock rod 62. When the anti-lock rod 62 rotates upward, the contact portion 64 can be completely fitted with the bottom of the sensing element 63, and the bottom of the sensing element 63 is the sensing end of the sensing element 63; in this embodiment, the sensing element 63 is a travel switch, and the controller is a PLC.

[0029] A buffer roller 7 is arranged above the positioning roller 3 on the machine body 1. The buffer roller 7 is arranged above the entire machine body 1. The buffer roller 7 has a separate mounting shell 71. The shell 71 and the machine body 1 are detachably connected by screws. The technicians can change the mounting positions of the shell 71 and the buffer roller 7 as needed. The buffer roller 7 has the same structure as the upper roller 4 and the lower roller 5. The buffer roller 7 is driven by a fourth motor unit installed in the shell 71. The fourth motor unit also includes a variable frequency motor and a gear box, and is also electrically connected to the controller.

[0030] The specific application process is as follows:

[0031] When in use, the coil 8 first passes between the upper roller 4 and the lower roller 5 and passes around the top of the buffer roller 7, and is finally wound into a coil by the positioning roller 3 (this process is collectively referred to as "unwinding"); it is worth noting that under normal circumstances, the coil 8 hung on the positioning roller 3 is as follows. Figure 2 The bottom of the coil 8 shown is not in contact with the anti-lock rod 62. This is because when the wire is initially wound onto the positioning roller 3, a technician needs to manually press it to control the diameter of the coil 8. The diameter of the coil 8 currently processed by the applicant is about 1.5 m. During the unwinding process, the frequency conversion motors in the first motor group, the second motor group, the third motor group, and the fourth motor group operate simultaneously, respectively giving the corresponding positioning roller 3, the upper roller 4, the lower roller 5, and the buffer roller 7 the main power, so that the driving force generated by the entire unwinding mechanism is greatly improved, which can cope with the unwinding of large-diameter coils 8, and the production efficiency is significantly improved. However, the locking problem may still exist. The fundamental reason is that the supply of wire raw materials on the conveying roller cannot keep up. In order to prevent the locking problem from damaging the frequency conversion motor during the unwinding process and the coil 8 quality problems and reduced production efficiency caused by the excessive contraction of the rolled coil 8, an anti-lock component 6 is also provided at the bottom of the positioning roller 3. The operation process of the anti-lock component 6 is as follows:

[0032] When the rolled coil 8 hung on the positioning roller 3 shrinks to form an extrusion on the bottom of the anti-lock rod 62, the probability of the first motor unit having a locking problem is greatly increased. When the anti-lock rod 62 is squeezed by the rolled coil 8 and rotates upward, the contact part 64 on the anti-lock rod 62 is completely attached to and in contact with the bottom of the travel switch, the travel switch will feedback the locking signal to the controller. The controller will indirectly control the speed of the positioning roller 3 to decrease by controlling the frequency conversion motor and control the speed of the upper roller 4, the lower roller 5, and the buffer roller 7 to increase to prevent the first motor unit from locking due to further contraction of the rolled coil 8, thereby ensuring the smooth continuation of the unwinding process, which is conducive to ensuring that the production efficiency is maintained at a high level.

[0033] Embodiment 2

[0034] The difference between this embodiment and the first embodiment is that Figure 1-Figure 3As shown, the sensing element 63 uses a pressure sensor; as a sensing electronic element, the pressure sensor is characterized in that it can sense changes in pressure. Unlike the travel switch in the first embodiment, which can only sense the presence or absence of pressure, the pressure sensor is selected as the sensing element 63 of the unwinding mechanism, in conjunction with the algorithm logic control of the controller, only when the pressure sensor senses the continuous pressure increase from the anti-lock bar 62, the controller will adjust the rotation speed of the positioning roller 3 and other parts, to prevent the anti-lock bar 62 from accidentally touching or only touching once to release a wrong locking signal to the controller, thereby avoiding adverse effects on the working efficiency of the unwinding process.

[0035] Comparative Example 1

[0036] The difference between this comparative example and the first embodiment is that the anti-lock rod 62 is not provided with a contact portion 64 that can completely fit with the bottom of the sensing element 63, but is only an ordinary straight rod. Figure 4 The left vertex shown in the figure and the sensing element 63 form a point-to-surface contact compression, and continuous compression can easily cause irreversible damage to the sensing end of the sensing element 63.

[0037] The above is only an embodiment of the utility model. The utility model is not limited to the field involved in this implementation case. The common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A wire unwinding mechanism, comprising a machine body, a driving device, a positioning roller, and a conveying roller, characterized in that: The conveying roller adopts a pair of rollers structure, which includes an upper roller and a lower roller that are arranged on the machine body and are symmetrical to each other. The driving device includes a first motor group for driving the positioning roller, a second motor group for driving the upper roller, and a third motor group for driving the lower roller. It also includes an anti-lock component for preventing the first motor unit from locking, the anti-lock component includes a through hole opened on the body, an anti-lock rod rotatably connected to one end of the positioning roller away from the body, a sensing element fixedly arranged on the top of the through hole, and a controller electrically connected to the sensing element and the driving device respectively, and the other end of the anti-lock rod that is not rotatably connected is inserted into the through hole and can fit with the sensing element.

2. A wire unwinding mechanism according to claim 1, characterized in that: The sensing element is a travel switch.

3. A wire unwinding mechanism according to claim 1, characterized in that: The sensing element is a pressure sensor.

4. A wire unwinding mechanism according to claim 2 or 3, characterized in that: The anti-lock rod is a straight rod, and a contact portion is arranged at one end of the anti-lock rod close to the through hole. When the anti-lock rod rotates to contact the sensing element, the contact portion is completely fitted with the bottom of the sensing element.

5. A wire unwinding mechanism according to claim 4, characterized in that: A buffer roller is arranged on the machine body above the positioning roller.

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