CN104858248A - Silking machine - Google Patents

Abstract

The invention discloses a silking machine and belongs to the technical field of metal rolling devices. The silking machine comprises a rotor assembly, a box, a supporting component and a drive assembly. The supporting component and the driving assembly are arranged on the box. The rotor assembly comprises a hollow shaft provided with a big end and a small end. The big end of the hollow shaft is provided with a first flange and a second flange which extend in the radial direction. A silking disk is fixed to the end face of the second flange. The supporting component comprises a supporting structure I and a supporting structure II, wherein the supporting structure I is arranged at the big end of the hollow shaft, and the supporting structure II is arranged at the small end of the hollow shaft. The supporting structure I comprises a bearing seat and an arc support, wherein the bearing seat is fixed to the box, and the arc support is arranged between the bearing seat and the hollow shaft in a swinging mode. According to the silking machine, the contact area between the hollow shaft and the bearing seat can be increased through the supporting structure I and the supporting structure II, the radial bearing capacity and the rotating speed of the silking machine can be increased, and the yield of wires is improved; because the support can swing, a certain angle adjusting capacity is achieved, the stability of the whole silking machine can be improved, and the service life of the whole silking machine is prolonged.

Description

a spinning machine

technical field

The invention belongs to the technical field of metal rolling equipment, and relates to a coil forming equipment for forming a ring coil from a high-speed linearly moving wire.

Background technique

The rolling speed of the modern high-speed wire rod production line has been increased from the early 40m/s to the current 120m/s, and the product specification range has also been extended to Φ5mm～Φ25mm. Bending at a certain inclination angle to form a ring-shaped coil, the coil falls to the air-cooled roller table and then transported to the coil collection station to complete the coil collection. In order to match the increasing rolling speed and achieve high-speed spinning of wire into coils, the new generation of laying heads needs to meet higher laying head speeds and wider laying head specifications, among which the laying heads are used to realize Due to the asymmetrical rotary structure of the spinning head rotor with loop forming function, the mass of the rotor is as high as 1800kg, and the maximum working speed of the rotor must reach 2100rpm. Therefore, during the working process of the laying machine, due to the inevitable eccentricity of the rotor caused by the bending of the wire and the thermal deformation of the related parts caused by the high temperature condition, it will produce a large periodical impact and vibration on the bearings and other supports of the laying machine, making the bearings Shortened life and limited increase in laying head speed. Therefore effective shock-absorbing or shock-absorbing measures are the key to the stable work of the laying head.

The existing laying machine vibration damping measures are to install a large and a small two sets of rolling bearings with different clearances at the large end of the hollow shaft, and to install the bearing seats of the small bearings flexibly, and to add another set of damping to the bearing seats. Or the spring damping mechanism is used to absorb the vibration energy when the spinning head rotates at high speed, so as to achieve the purpose of reducing vibration. However, this structure puts forward extremely strict requirements on the clearance of the bearing, the processing accuracy of the spinning head rotor and the box, and the installation accuracy. If the installation and adjustment are not in place, it is likely to cause the vibration impact of the spinning head rotor On one bearing while the other is idling, instead of reducing the vibration of the laying head, it shortens the life of the bearing bearing. In addition, due to the special structure of the laying head, the turning diameter of the large end is relatively large, so the rolling bearings used are non-standard rolling bearings with large dimensions, which will limit the further increase in the speed of the laying head.

In view of the above problems, it is necessary to improve the structure of the existing laying head, and use the special dynamic characteristics of the combined bearing to support the smooth operation of the rotor of the laying head and realize the shock absorption function of the rotor, thereby improving the working efficiency of the laying head. Stability, and can further increase the speed of the laying head.

Contents of the invention

In view of this, the present invention provides a laying head, which overcomes the problems in the prior art that the service life of the bearing bearing is not high and the speed of the laying head is limited.

The purpose of the present invention is achieved through the following technical solutions:

A laying machine, comprising a rotor assembly with a high-speed linearly moving wire to form an annular coil, a box for supporting and fixing the rotor assembly, and a support member arranged on the box for supporting the rotor assembly and a pair of The rotor assembly provides a driving assembly for power, and the rotor assembly includes a hollow shaft with a large end and a small end, a spinning disk fixed to the large end of the hollow shaft, and a spinning pipe arranged in the hollow shaft, characterized in that: The large end of the hollow shaft has a first flange and a second flange extending in the radial direction, the spinneret is fixed on the end surface of the second flange, and the support member includes a supporting structure arranged at the large end of the hollow shaft I and the support structure II arranged at its small end, the support structure I includes a bearing seat fixed on the box body and a swingable arc support arranged between the bearing seat and the hollow shaft, the outer arc support The circular surface and the surface of the inner hole are respectively pressed against the surface of the inner hole of the bearing seat and the outer circular surface of the first flange of the hollow shaft. The circular arc support is provided with an engaging structure, and the bearing seat is provided with an engaging structure. The structure is a snap fit structure that matches the structure, and the bearing seat is also provided with a limit structure that is used to limit the support of the circular arc and can swing around it.

Further, the engaging structure is a protrusion arranged on both sides of the arc support and extending to both sides along the arc, and the engaging structure is a groove that is clearance-fitted with the protrusion.

Further, the limit structure is a radial limit nail arranged on the arc surface of the bearing seat and distributed axially or/and an axial limit nail arranged on the end face of the bearing seat and distributed radially on the groove area, The arc support is provided with a radial limit hole and an axial limit hole which respectively cooperate with the radial limit nail and the axial limit nail, so that the arc support can swing around the limit nail in the bearing seat .

Further, the head of the radial limit nail is an inner or outer hexagon bolt head, the middle part is a threaded connection section and the tail is an optical axis fixing section, the threaded connection section is fixed on the bearing seat, and the optical axis fixing section Insert it into the radial limit hole of the arc support.

Further, the outer diameter of the arc support is smaller than the diameter of the bearing seat hole, and the outer diameter of the first flange of the hollow shaft and the inner hole diameter of the arc support are clearance fit.

Further, the arc support is composed of at least three segmented support blocks.

Further, the outer circle of the segmented support blocks supported by the arc can also be configured as a middle arc and hypotenuse on both sides.

Further, the supporting structure II is a pair of conical bearings or angular bearings.

The beneficial effects of the present invention are:

The invention can increase the contact area with the hollow shaft and the bearing seat by setting the arc support, thereby increasing its radial load capacity, and has a higher allowable rotational speed than rolling bearings of the same size specification, so it can allow the laying machine Running at higher speeds increases the laying speed of the laying head, which in turn increases the yield of the wire. At the same time, when the hollow shaft rotates at high speed, the oil film pressure generated between the first flange of the hollow shaft and the surface of the inner hole of the arc support combined with the arc support with swing function can form a certain damping and elastic effect, which can buffer and absorb the load. Impact energy, thereby reducing the vibration of the laying head and improving the running stability of the laying head.

Other advantages, objects and features of the present invention will be set forth in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the investigation and research below, or can be obtained from It is taught in the practice of the present invention. The objects and other advantages of the invention may be realized and attained by the following specification.

Description of drawings

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings, wherein:

Fig. 1 is the structural representation of laying machine of the present invention;

Fig. 2 is A-A sectional view of Fig. 1;

Fig. 3 is the partially enlarged view I of arc support;

Fig. 4 is a partially enlarged view II of the arc support;

Fig. 5 is the shock absorbing schematic diagram of supporting structure II;

Figure 6 is a schematic diagram of the dynamics of the support structure II.

Reference signs:

1-box; 2-hollow shaft; 3-big end of hollow shaft; 4-small end of hollow shaft; 5-spinning disk; 6-spinning pipe; 7-first flange; 8-second convex Edge; 9-bearing seat; 10-arc support; 11-protrusion; 12-groove; 13-radial limit nail; 14-axial limit nail; 15-radial limit hole; 16-axis 17-drive assembly; 18-inner or outer hexagon bolt head; 19-thread connection section; 20-optical axis fixing section.

Detailed ways

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.

As shown in Figures 1-4, the present embodiment is a laying machine, including a rotor assembly with a high-speed linear motion wire to form an annular coil, a box 1 for supporting and fixing the rotor assembly, and a box 1 arranged in the box. The supporting part on the body 1 is used to support the rotor assembly 1 and the drive assembly 17 that provides power to the rotor assembly. The drive assembly 17 can drive the rotor assembly to rotate at a high speed up to 2100rpm. The rotor assembly includes a large end 3 and a small end 4 The hollow shaft 2, the spinneret 5 fixed to the big end 3 of the hollow shaft, and the spinneret 6 arranged in the hollow shaft 2, the big end of the hollow shaft has a first flange 7 extending in the radial direction and the second flange 8, the spinneret 5 is fastened on the end face of the second flange 8 with bolts, and the support member includes a support structure 1 arranged at the large end 3 of the hollow shaft and a support structure 4 arranged at the small end 4 thereof. The support structure II, the support structure I includes a bearing seat 9 fixed on the box body 1 and a swingable arc support 10 arranged between the bearing seat 9 and the hollow shaft 2, and the arc support 10 is usually composed of It is made of a combination of a layer of anti-friction material and a rigid matrix, such as Babbitt alloy + alloy steel matrix or porous mosaic structure, etc. The outer circular surface and inner hole surface of the arc support 10 are respectively pressed against the inner hole of the bearing seat 9 On the surface and the outer circular surface of the first flange 7 of the hollow shaft, the arc support 10 is provided with a snap-fit structure, and the bearing seat 9 is provided with a snap-fit structure matching the snap-fit structure. The bearing seat 9 is also provided with a limit structure for limiting the arc support 10 and swinging around it. The support structure II is a pair of conical bearings or angular bearings, which can bear large axial and angular bearings at the same time. Radial load, thereby offsetting the axial force of the drive assembly 17 on the rotor assembly, reducing wear on the bearing.

Figure 5 is a schematic diagram of the shock absorption of the support structure II, and Figure 6 is a schematic diagram of the dynamics of the support structure II. It always acts along the direction from the actual axis of the hollow shaft to the fulcrum of the arc support, and because the arc support can swing with the displacement movement of the hollow shaft at any time, the oil film force of the arc support depends entirely on The movement of the hollow shaft along the direction from the actual axis to the arc support fulcrum.

The resultant force on the arc support can be expressed as:

F _ta ＝F _ta (e _ra ，e _ta )

F _ra ＝F _ra (e _ra ，e _ta )

The moment of the oil film force on the fulcrum is F _{ra ra a} , if the moment is not zero, the arc support will swing around the fulcrum, thereby changing the oil film thickness and the distribution of oil film pressure, and the oil film force will also change accordingly until F _{ra ra} = 0 to reach the balance position of the arc support. That is to say, the oil film force reaches the equilibrium when it just passes through the fulcrum of the arc support, that is, F _ta (e _ra , e _ta )=0. When e _ra is fixed, the balance of the arc support can only be achieved at a certain e _ta . Therefore, the oil film force F _ra only depends on one parameter e _ra .

In this embodiment, by setting the support components including the support structure I and the support structure II, and setting the arc support in the support structure I, the contact area with the hollow shaft and the bearing seat can be increased, and its radial load capacity can be increased. Compared with rolling bearings of the same size and specifications, it has a higher allowable rotational speed, so it can allow the laying head to run at a higher speed, increase the laying speed of the laying head, and thus increase the production of wire rods, and form a structure in the support structure II For tapered bearings or angular bearings, it can bear large axial and radial loads at the same time, thereby offsetting the axial force of the drive assembly on the rotor assembly and reducing wear on the bearing; at the same time, the hollow shaft rotates at high speed on the hollow shaft The oil film pressure generated between the first flange and the surface of the inner hole of the arc support combined with the arc support with swing function can form a certain damping and elastic effect, which can buffer and absorb the impact energy of the load, thereby reducing the stress of the laying machine Vibration improves the running stability and service life of the laying machine.

As an improvement of this embodiment, the engaging structure of this embodiment is a protrusion 11 arranged on both sides of the arc support and extending to both sides along the arc, and the engaging structure is a gap fit with the protrusion 11 Groove 12. When assembling, just slide the protrusion 11 gently along the groove 12, which is convenient and quick to assemble. The cross section of the protrusion 11 and the groove 12 can be rectangular or triangular, etc., and this embodiment is preferably rectangular, which can be Easy to process.

As an improvement of this embodiment, the limiting structure of this embodiment is the radial limiting nails 13 arranged on the arc surface of the bearing seat 9 along the axial direction or/and arranged on the end surface of the bearing seat on the groove area along the radial direction. The axial limit nail 14 distributed in the direction includes three schemes of radial limit nail 13 or axial limit nail 14 or a combination of radial limit nail 13 and axial limit nail 14. In this embodiment, the axial limit nail 14 is preferred. The scheme of the limit nail 14, and the gap fit with the axial limit nail 14 and the axial limit hole 16 are arranged on the arc support 10 to cooperate, so that the arc support 10 can be wound around the limit nail in the bearing seat 9 Swing, with a certain angle adjustment ability, when the hollow shaft 2 rotates at high speed, it can automatically adjust the non-concentricity between the hollow shaft 2 and the bearing seat 9 caused by manufacturing errors and assembly errors.

As an improvement of this embodiment, the outer diameter of the arc support 10 is smaller than the hole diameter of the bearing seat 9, which can reduce the contact area between the arc support 10 and the bearing seat 9, and promote the circular arc support 10 to wrap around the positioning pin in the bearing seat The rotation effect further improves its adjustment ability. In addition, the outer diameter of the first flange 7 of the hollow shaft and the inner hole diameter of the arc support 10 are clearance fit, which is beneficial to the first flange 7 of the hollow shaft and the arc An oil film layer with a stable thickness is formed between the surfaces of the inner holes of the support 10, forming a certain damping and elastic effect on the arc support 10, which can buffer and absorb the impact energy of the load, thereby reducing the vibration of the laying head and improving the operation of the laying head smoothness.

As an improvement of this embodiment, the head of the radial limit nail 13 is an inner or outer hexagon bolt head 18, the middle part is a threaded connection section 19 and the tail is an optical axis fixing section 20, and the threaded section 19 is fixed on the bearing On the seat 9, the optical axis fixing section 20 is inserted into the radial limit hole 15 to limit the movement of the arc support 10 to prevent it from moving along the arc surface of the bearing seat 9, but it has a degree of freedom of transportation. The optical axis The end of the fixing section 20 is set in a spherical shape, which is convenient for easy insertion and enables the arc support 10 to swing.

As an improvement of this embodiment, the circular arc support 10 is composed of at least three segmental support blocks. In this embodiment, the outer circle of the segmental support blocks of the circular arc support 10 is set as a middle arc, The hypotenuse structure on both sides, as shown in Figure 3, makes the outer circle of the arc support 10 in good contact with the inner hole of the bearing seat 9, and at the same time forms a pendulum space with the bearing seat 9, thereby increasing the positioning of the arc support 10 The amplitude of nail swing is improved to improve its conformability.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements, without departing from the spirit and scope of the technical solution, should be included in the scope of the claims of the present invention.

Claims (8)

1. A laying machine, comprising a rotor assembly having a high-speed linearly moving wire rod to form an annular coil, a casing for supporting and fixing the rotor assembly, and a support member arranged on the casing for supporting the rotor assembly And the driving assembly that provides power to the rotor assembly, the rotor assembly includes a hollow shaft with a large end and a small end, a spinning disk fixed to the large end of the hollow shaft, and a spinning tube arranged in the hollow shaft, characterized in that: The large end of the hollow shaft has a first flange and a second flange extending in the radial direction, the spinneret is fixed on the end surface of the second flange, and the support member includes a The support structure I and the support structure II arranged at its small end, the support structure I includes a bearing seat fixed on the box body and a swingable arc support arranged between the bearing seat and the first flange of the hollow shaft, so The outer circular surface and the inner hole surface of the arc support are respectively elastically pressed against the inner hole surface of the bearing seat and the outer circular surface of the first flange of the hollow shaft, and the arc support is provided with an engaging structure, and the The bearing seat is provided with a snap-fit structure matching the snap-fit structure, and the bearing seat is also provided with a limit structure for limiting the support of the circular arc and swinging around it. 2. A laying machine according to claim 1, characterized in that: the engaging structure is a protrusion arranged on both sides of the arc support and extending to both sides along the arc, and the engaging structure is Grooves for clearance fit with said protrusions. 3. A laying head according to claim 1, characterized in that: the limiting structure is a radial limiting nail arranged on the arc surface of the bearing seat and distributed in the axial direction or/and arranged on the bearing seat Axial limit nails distributed radially on the end surface of the groove area, the circular arc support is provided with radial limit holes and axial limit pins which are in clearance fit with the radial limit nails and the axial limit nails respectively. Position holes, so that the arc bearing can swing around the limit nail in the bearing seat. 4. A kind of laying machine according to claim 3, characterized in that: the head of the radial limit nail is an inner or outer hexagon bolt head, the middle part is a threaded connection section, and the tail is an optical axis fixing section, The threaded connection section is fixed on the bearing seat, and the optical axis fixing section is inserted into the radial limiting hole. 5. A laying machine according to claim 1, characterized in that: the diameter of the outer circle of the arc support is smaller than the diameter of the bearing seat hole, and the outer diameter of the first flange of the hollow shaft is less than the diameter of the arc support The bore diameter is a clearance fit. 6. A laying head according to claim 1, characterized in that: the arc support is composed of at least three segmented support blocks. 7. A laying machine according to claim 6, characterized in that: the outer circle of the segmented support block supported by the arc is set as a middle arc and hypotenuse structure on both sides. 8. A laying head according to claim 1, characterized in that: said supporting structure II is a pair of tapered bearings or angular bearings.