CN103160653A - Sensor for read arm in electronic multi-arm opening device of high speed loom - Google Patents

Abstract

The invention discloses a sensor for a read arm in an electronic multi-arm opening device of a high speed loom. The sensor comprises a conductive plate, a collecting pipe and an induction coil, wherein a bakelite is arranged on the surface of the collecting pipe; one end of the collecting pipe is fixedly connected with the conductive plate through a bolt and the induction coil is arranged at the other end of the collecting pipe; and a nozzle is arranged on the induction coil. The induction coil is a circular-arc-shaped pure copper pipe. The sensor for the read arm in the electronic multi-arm opening device of the high speed loom is simple in structure; high-frequency induction quenching is performed on the working region of the read arm part so that the mechanical properties of the read arm part in the electronic multi-arm opening device of the high speed loom under the working condition can be satisfied; as a result, the working condition requirements of the read arm part are met and the fatigue life of the read arm part is prolonged.

Description

Inductor of the reading arm in the electronic dobby shedding device of the high-speed loom

technical field

The invention relates to an inductor, in particular to an inductor for a reading arm in an electronic multi-arm shedding device of a high-speed loom, and belongs to the technical field of thermal processing of components in textile machinery.

Background technique

China is a big country in the textile industry. Especially since the 21st century, China's textile machinery industry has developed relatively rapidly. Both the scale of the textile industry and the output of textiles rank first in the world. With the high-speed development of my country's textile machinery in recent years, the requirements for the mechanical properties of parts are getting higher and higher, especially the service life of the reading arm in the electronic dobby shedding device of high-speed looms is higher. The reading arm part is a typical transmission structure in the electronic multi-arm shedding device for textile machinery, with a thickness of 3mm and belongs to thin plate parts. As shown in Figure 1, the shaded part is the working area of the reading arm part, also known as the hardened area, which is matched with the eccentric wheel made of GCr15, and the hardness requirement is 59~61HRC; the blank area is the matrix, without technical requirements. The heat treatment methods commonly used in the past are generally conventional quenching and austempering to meet its mechanical performance requirements. For thin-walled parts such as reading arms (thickness is only 3mm), it is required to strictly control the decarburization layer (no more than 0.1mm) during use, and the mechanical performance requirements are high (maximum force Fmax≥7.6KN). However, the phenomenon of large deformation, insufficient toughness and serious decarburization after conventional quenching cannot meet the requirements of high-speed looms. The technical difficulty of the heat treatment of the reading arm is that the hardness of the hardened area and the base area is quite different. There is no obvious transition area between the two areas, and the stress generated under the working load cannot be released, which will have a certain impact on the service life of the reading arm. Therefore, it is necessary to find a new heat treatment device to meet the mechanical properties of the reading arm parts and prolong the service life.

Contents of the invention

The purpose of the present invention is to provide a sensor for the reading arm in the electronic multi-arm shedding device of a high-speed loom. Using the present invention to carry out surface quenching treatment on the working area of the reading arm, not only can the hardness distribution of the reading arm be in a gradient distribution, but also A certain transition zone can also be guaranteed between the hardened zone and the matrix.

The purpose of the present invention is achieved through the following technical solutions, the sensor of the reading arm in the electronic multi-arm opening device of the high-speed loom includes a conductive plate, a confluence pipe and an induction coil; the surface of the confluence pipe is provided with insulating bakelite, and one end of the confluence pipe passes through Bolts are fixedly connected to the conductive plate, and the induction coil is provided at the other end of the confluence pipe; nozzles are provided on the induction coil.

The induction coil is an arc-shaped pure copper tube.

The effective width, height and length of the induction coil are 8mm, 6mm and 70mm respectively.

The number of the nozzles is 6, and the 6 nozzles are evenly arranged on the induction coil.

The invention adopts high-frequency induction quenching in the working area for the parts of the reading arm to meet the mechanical properties of the parts of the reading arm in the electronic multi-arm opening device for textile machinery under working conditions, meet the requirements of the working conditions, and prolong the fatigue life. When in use, place the induction coil along the outline of the hardened area of the reading arm, spray liquid for 3 seconds after heating, so that the residual temperature of the core is air-cooled after the surface of the reading arm is completely cooled. Due to the effect of heat conduction, the cooling rate of the core is obviously much faster than the normal air cooling rate. This cooling method ensures that the hardened zone of the reading arm can obtain different cooling rates from the surface to the core, so as to finally ensure a good hardness gradient distribution. With the matrix can also ensure a certain transition zone. The working area of the reading arm has an obvious gradient distribution of hardness from the hardness area to the substrate, and the strength-toughness ratio is about 4:6. The good strength-toughness ratio ensures a long life of the reading arm parts.

Description of drawings

Fig. 1 is the structural representation of reading arm in the electronic multi-arm shedding device of high-speed loom;

Fig. 2 is the side view of inductor of the present invention;

Fig. 3 is the top view of the sensor of the present invention;

In the figure: 1 conductive plate, 2 manifold, 3 induction coil, 4 nozzle.

Detailed ways

As shown in Fig. 1 and Fig. 2, the sensor of the reading arm in the electronic multi-arm shedding device of the high-speed loom includes a conductive plate 1, a confluence pipe 2 and an induction coil 3. The surface of the confluence pipe 2 is provided with insulating bakelite, one end of the confluence pipe 2 is fixedly connected with the conductive plate 1 through bolts, and the other end of the confluence pipe 2 is provided with an induction coil 3 . The induction coil 3 is provided with a nozzle 4 .

The induction coil 3 is an arc-shaped pure copper tube.

In order to make the liquid spray uniform, six nozzles 4 are equally divided and symmetrically distributed on the induction coil 3 .

To design the size of the induction coil, the size design of the induction coil must consider the following aspects:

(1) The material, size, shape and structural characteristics of the quenched parts;

(2) Parameter indicators such as frequency and power of high-frequency generators;

(3) The quenching method and quenching device of the parts.

The material of the reading arm is 60Si2mnA, the size and thickness are 3mm, the shape of the working area is arc-shaped, and the diameter is 61mm; the induction hardening frequency is 150KHZ, and the current is 0.1KA; the quenching method is to heat the working area at 860~890°C, and spray liquid to cool after heating . According to the above working conditions, the main dimensions of the induction coil mainly include the effective coil diameter, height and the length of the inductor.

1. The width of the effective coil of the sensor

Because the reading arm is surface quenched, and the thickness of the reading arm is 3mm, according to the formula:

B＝b＋﹙4~10﹚mm

In the formula, B—the thickness of the sensor, mm;

b—thickness of part, mm.

According to the thickness of the reading arm is 3mm, take D=3+5=8mm.

2. Sensor effective circle height

According to the technical requirements of the reading arm in Figure 1, it is determined that the size of the hardened zone does not exceed 40% of the total height of the reading arm. The total height of the arc of the reading arm is about 10mm, that is, the size of the hardened zone does not exceed 4mm, according to the formula:

H＝h＋﹙2~4﹚mm

In the formula, H—the height of the effective coil of the induction coil, mm;

h—the height of the quenched part of the part, mm.

In order to obtain a good toughness ratio, H=4+2=6mm is taken.

3. The length of the effective coil of the sensor

The length of the effective coil of the sensor is based on the length of the hardened zone of the reading arm, and is finally determined to be 70mm.

Claims (4)

1. read the inductor block of arm in the electronic multi-arm opening device of high speed loom, it is characterized in that, described inductor block comprises conducting plates, collecting pipe and induction coil; The collecting pipe surface is provided with bakelite, and collecting pipe one end is fixedly connected with described conducting plates by bolt, and the collecting pipe the other end arranges described induction coil; Described induction coil is provided with nozzle.

2. read the inductor block of arm in the electronic multi-arm opening device of high speed loom according to claim 1, it is characterized in that, described induction coil is circular-arc pure copper tube.

3. read the inductor block of arm in the electronic multi-arm opening device of high speed loom according to claim 1, it is characterized in that, the effective width of described induction coil, height and length are respectively 8mm, 6mm, 70mm.

4. read the inductor block of arm in the electronic multi-arm opening device of high speed loom according to claim 1, it is characterized in that, the number of described nozzle is 6, and 6 nozzle deciles are symmetricly set on described induction coil.

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