阅读说明：本技术 用于硬质金属线的绕紧力传感器和绕紧力检测方法 (Tension sensor for hard metal wire and tension detection method ) 是由 罗少轩 乔爱民 汤庆国 于 2019-05-16 设计创作，主要内容包括：本发明公开了一种用于硬质金属线的绕紧力传感器,包括过线导轮、悬臂式压力传感器和压线导轮,所述的压线导轮分为左右2组,分别安装在所述的悬臂式压力传感器的左右两侧的支撑台上。本发明还公开了所述用于硬质金属线的绕紧力传感器的绕紧力检测方法,首先让硬质金属线依次通过左侧压线导轮、过线导轮和右侧压线轮,然后启动绕线机将金属线绷紧并进行卷绕,金属线会对过线导轮以及悬臂式压力传感器的检测轴产生向下的压力,再通过三角函数运算就可以得出压力和绕紧力之间的关系,并计算出金属线的绕紧力,从而实现了硬质金属线在卷绕过程中对绕紧力的实时监测,并且安装灵活方便,适合大型电缆生产设备进行升级改造。(The invention discloses a winding force sensor for a hard metal wire, which comprises a wire passing guide wheel, a cantilever type pressure sensor and a wire pressing guide wheel, wherein the wire pressing guide wheel is divided into a left group and a right group 2, and the left group and the right group are respectively arranged on supporting tables at the left side and the right side of the cantilever type pressure sensor. The invention also discloses a winding force detection method of the winding force sensor for the hard metal wire, which comprises the steps of firstly enabling the hard metal wire to sequentially pass through the left wire pressing guide wheel, the wire passing guide wheel and the right wire pressing wheel, then starting the winding machine to tighten and wind the metal wire, enabling the metal wire to generate downward pressure on the wire passing guide wheel and the detection shaft of the cantilever type pressure sensor, obtaining the relation between the pressure and the winding force through trigonometric function operation, and calculating the winding force of the metal wire, so that the real-time monitoring of the winding force of the hard metal wire in the winding process is realized, the installation is flexible and convenient, and the method is suitable for upgrading and transforming large-scale cable production equipment.)

1. A winding force sensor for a hard metal wire comprises a wire guide wheel (4) and a cantilever type pressure sensor (2), the wire guide wheel (4) is arranged on a detection shaft (7) of the cantilever type pressure sensor (2), a cylindrical elastic body (3) is processed inside the cantilever type pressure sensor (2), the structure of the elastic body (3) is similar to an I-shaped structure, namely, two symmetrical sides of the cylindrical structure are respectively provided with a blind hole, 2 resistance type strain gauges (5) are pasted in each blind hole, 4 resistance type strain gauges are pasted in the blind holes at the two sides, and form a Wheatstone bridge structure, the rear part of the pressure sensor (2) is provided with a mounting seat (1), the sensor is characterized in that 4 mounting holes (8) are formed in the mounting base (1), and power supply and signal cables (5) of the sensor are led out from the rear part of the mounting base (1).

2. The wind force sensor of claim 1, wherein: the wire passing guide wheel (3) is only 1, and is connected with the tail end of a detection shaft (6) of the cantilever type pressure sensor (2) through a bearing inside the wire passing guide wheel, the cantilever type pressure sensor (2) is fixed on a support table (10), an elastic body (3) is arranged inside the cantilever type pressure sensor (2), the elastic body (3) is pasted with a resistance type strain gauge (5), wire pressing guide wheels (9) and (11) are respectively installed on the support table (10) on the left side and the right side of the cantilever type pressure sensor (2), and the wire pressing guide wheels (9) and (10) are respectively provided with 2 guide wheels.

3. A winding force detecting method of the winding force sensor according to claim 1, comprising the steps of:

A. a section of straight measuring area of a metal wire is selected in production equipment, the width of the measuring area is about 2m, 1 group of wire pressing guide wheels are respectively installed at the left end and the right end of the measuring area, the wire pressing guide wheels are fixed on a supporting table of the equipment and are equal in horizontal height, and the purpose of the wire pressing guide wheels is to eliminate the shaking of the metal wire in the measuring area.

B. The center of the measuring area is provided with a cantilever type pressure sensor and a wire guide wheel, the sensor is fixed on a support table of the equipment, the horizontal height of the wire guide wheel is lower than that of the wire pressing guide wheels on the left side and the right side, and the included angle theta between the wire guide wheel and the wire pressing guide wheels on the two sides is about 120 degrees by taking the wire guide wheel as a peak.

C. The method comprises the steps that a hard metal wire sequentially passes through a left wire pressing guide wheel, a wire passing guide wheel and a right wire pressing guide wheel, a winch is rotated to enable the metal wire to be tightened, an included angle 0 is formed between the wire pressing guide wheel and the wire passing guide wheel, so that the metal wire can generate pressure F to the wire passing guide wheel, the pressure F is a component of the wire tightening force F and meets a trigonometric function relation with the wire tightening force F, the pressure F is transmitted to a detection shaft of a cantilever type pressure sensor through the wire passing guide wheel, an elastic body inside the cantilever type pressure sensor is subjected to micro deformation, the output voltage of a Wheatstone bridge formed by resistance type strain gauges pasted on the elastic body is changed, the voltage change and the pressure change are in a linear relation, and the numerical value of the wire tightening force F can be obtained through trigonometric function operation.

Technical Field

The invention belongs to the field of winding force detection, and particularly relates to a winding force sensor and a winding force detection method for a hard metal wire.

Background

The hard metal wire is an inner core of the hard cable, and in large-scale hard cable production equipment, in order to ensure the winding quality and specification consistency of a hard metal wire coil, high requirements are made on the winding force control of a winch when the metal wire is wound, namely the winch is required to always maintain the winding force with proper magnitude when the metal wire is wound. If the winding force is too small, firstly, the hard metal wire cannot be straightened, and a plurality of bulges appear on the wire coil, and secondly, because the resistance of the hard metal wire is larger when the hard metal wire passes through each transition guide wheel on the production equipment, the whole winding speed is reduced and the production efficiency is influenced because the winding force is too small; if the winding force is too large, the metal wire is pulled too tightly on the capstan to be stuck into the surface layer of the wire coil, so that the finished wire coil is blocked and unsmooth in the wire unwinding process in the future.

At present, various winding force measuring technologies for flexible wires and thin wires have appeared and are widely applied to various textile equipment. However, for the hard metal wire production equipment, the metal wire is hard and heavy, and the winding force of the capstan is also large, so that the vibration of the metal wire is also large during winding, and the detection precision is influenced; in addition, the hard metal wire is difficult to recover after being deformed, so that the bending angle also needs to be controlled well in the measuring process, and the winding force sensor and the measuring method adopting the soft wire and the thin wire are not suitable any more. At present, for a hard metal wire with the diameter of more than 5mm, such as a single-stranded copper core wire, a practical winding force sensor and a winding force detection method are not available, the magnitude of the winding force can only be judged and controlled by the experience of an operator in the actual production process, so that the automation degree of production equipment is low, the quality and the specification consistency of finished wire coils of different batches are difficult to guarantee, and at present, a plurality of domestic large-scale cable production enterprises seek equipment upgrading and transformation methods, so that a novel winding force sensor and a novel winding force detection method for the hard metal wire are urgently needed to solve the problems.

Disclosure of Invention

The invention aims to provide a winding force sensor and a winding force detection method for a hard metal wire, which can accurately detect the winding force of the hard metal wire in the winding process and are used for upgrading and reconstructing large-scale cable production equipment.

In order to achieve the purpose, the invention adopts the following technical scheme: a winding force sensor for a hard metal wire comprises wire passing guide wheels, cantilever type pressure sensors and wire pressing guide wheels, wherein only 1 wire passing guide wheel is connected with the tail end of a detection shaft of each cantilever type pressure sensor through a bearing in each wire passing guide wheel, each cantilever type pressure sensor is fixed on a support table, an elastic body is arranged in each cantilever type pressure sensor, a resistance type strain gauge is pasted on each elastic body, each wire pressing guide wheel is divided into a left group and a right group and is respectively installed on the support tables on the left side and the right side of each cantilever type pressure sensor, and each 1 wire pressing guide wheel is provided with 2 guide wheels;

in order to solve the technical problem, the invention adopts another technical scheme that: the winding force detection method for the winding force sensor for the hard metal wire comprises the following steps:

A. a section of straight measuring area of a metal wire is selected in production equipment, the width of the measuring area is about 2m, 1 group of wire pressing guide wheels are respectively installed at the left end and the right end of the measuring area, the wire pressing guide wheels are fixed on a supporting table of the equipment and are equal in horizontal height, and the purpose of the wire pressing guide wheels is to eliminate the shaking of the metal wire in the measuring area.

B. The center of the measuring area is provided with a cantilever type pressure sensor and a wire guide wheel, the sensor is fixed on a support table of the equipment, the horizontal height of the wire guide wheel is lower than that of the wire pressing guide wheels on the left side and the right side, and the included angle theta between the wire guide wheel and the wire pressing guide wheels on the two sides is about 120 degrees by taking the wire guide wheel as a peak.

C. The method comprises the steps that a hard metal wire sequentially passes through a left wire pressing guide wheel, a wire passing guide wheel and a right wire pressing guide wheel, a winch is rotated to enable the metal wire to be tightened, an included angle theta is formed between the wire pressing guide wheel and the wire passing guide wheel, so that the metal wire can generate pressure F to the wire passing guide wheel, the pressure F is a component of the wire tightening force F and meets a trigonometric function relation with the wire tightening force F, the pressure F is transmitted to a detection shaft of a cantilever type pressure sensor through the wire passing guide wheel, an elastic body inside the cantilever type pressure sensor is subjected to micro deformation, the output voltage of a Wheatstone bridge formed by resistance type strain gauges pasted on the elastic body is changed, the voltage change and the pressure change are in a linear relation, and the numerical value of the wire tightening force F can be obtained through trigonometric function operation.

The invention has the beneficial effects that: by the winding force sensor and the winding force detection method, the real-time winding force of the production equipment in the process of winding the hard metal wire can be accurately measured, and is fed back to the winding force controller to serve as the basis for adjusting the winding force, so that a closed-loop control system is formed, errors caused by manual experience judgment are avoided, the automation degree and the production efficiency of the production equipment are improved, and the winding quality of a finished product hard metal wire coil is ensured.

Drawings

FIG. 1 is a side view of a tension sensor;

FIG. 2 is a perspective view of a tension sensor;

FIG. 3 is an installation view of a tension sensor;

fig. 4 is a schematic diagram of a method for detecting a tightening force.

Detailed Description

The invention is further described with reference to the accompanying drawings 1-4:

a winding force sensor for hard metal wires is provided, the shape of which is shown in figures 1 and 2, and comprises a wire guide wheel 4 and a cantilever type pressure sensor 2, the wire guide wheel 4 is arranged on a detection shaft 7 of the cantilever type pressure sensor 2, a cylindrical elastic body 3 is processed inside the cantilever type pressure sensor 2, the elastic body 3 is of a structure similar to an I-shaped structure, namely, two symmetrical sides of the cylindrical structure are respectively provided with a blind hole, 2 resistance type strain gauges 5 are pasted in each blind hole, 4 resistance type strain gauges are pasted in the blind holes at the two sides, and a Wheatstone bridge structure is formed, the rear part of the pressure sensor 2 is provided with an installation seat 1, the installation seat 1 is provided with 4 installation holes 8, and a power supply and signal cable 5 of the sensor is led out through the rear part of the installation seat 1.

In a preferred embodiment of the present invention, the tension sensor is mounted as shown in FIG. 3: left side line ball guide pulley 9, cantilever type pressure sensor 2 and right side line ball guide pulley 11 are installed on the supporting bench 10 of equipment, cross line guide pulley 3 and install on cantilever type pressure sensor 2, and hard metal wire 13 loops through left side line ball guide pulley 9, crosses line guide pulley 3 and right side line ball guide pulley 11, pressure sensor 2 pass through cable 5 and display instrument 12 and connect.

In a preferred embodiment of the present invention, the principle of the tightening force detection method is shown in FIG. 4:

after the tightening force sensor is installed, the winding winch 14 rotates clockwise to pull the metal wire 13 to move along the direction 15, and most of vibration on the metal wire is eliminated after the hard metal wire 13 passes through the wire pressing guide wheels 9 and 11 on the two sides, so that the pressure of the metal wire on the wire passing guide wheel 3 is stable, and measurement errors caused by severe vibration of the metal wire are avoided; because the hard metal wire 13 forms the included angle theta at the left side and the right side of the wire passing guide wheel 3, and the hard metal wire 13 is in a tightening state in the winding process, the wire at the two sides of the wire passing roller wheel 3 has the tightening force F with equal magnitude and opposite direction, the tightening force F can generate an upward pressure F to the wire passing guide wheel 3, the magnitude of the F is equal to the resultant force generated by the combined action of the tightening forces F at the two sides of the wire passing guide wheel 3, and the relation between the tightening force F and the pressure F can be known according to the mechanics principle:

the pressure F is transmitted to the cantilever type pressure sensor 2 through the wire guide wheel 3 and the detection shaft 6, the elastic body 3 inside the pressure sensor 2 deforms, the output voltage of a Wheatstone bridge formed by the resistance type strain gauges 5 adhered to the elastic body 3 changes, the voltage change and the pressure F change are in a linear relation, the pressure F of the hard metal wire 13 on the wire guide wheel 3 can be accurately measured by being transmitted to the display instrument 12 through the cable 4, and the numerical value of the winding force F can be displayed after signal processing and trigonometric function conversion are carried out inside the display instrument 12, so that the size of the winding force is accurately measured.

In conclusion, the method can effectively realize accurate measurement of the real-time winding force of the hard metal wire in the winding process, avoids uncertainty and error caused by manual experience judgment, greatly improves the automation degree of production equipment, ensures the quality of finished wire coils, improves the production efficiency, and solves the problem of detection of the winding force of the hard metal wire with the diameter of more than 5mm in the winding process; meanwhile, 2 groups of wire pressing guide wheels are additionally arranged on two sides of the wire passing guide wheel, the problem of large shaking in the metal wire winding process is solved, the measurement error caused by shaking of the metal wire is avoided, and the wire pressing guide wheel is simple to install, low in cost and suitable for large-scale cable production equipment to upgrade and reform.