Self-adaptive countershaft device

Abstract

The utility model belongs to the field of hot-rolled steel pipe rolling equipment in the ferrous metallurgical industry, and relates to a self-adaptive shaft aligning device which is used for assisting centering of a transmission shaft and a roller shaft in a continuous pipe rolling mill and comprises a centering guide shaft and a centering guide cylinder matched with the centering guide shaft, the centering guide shaft is fixedly connected to one end, close to the roller shaft, of the transmission shaft, and the centering guide cylinder is fixedly connected to the other end of the transmission shaft. The centering guide cylinder is fixedly connected to the end, close to the transmission shaft, of the roller shaft. The end of the centering guide shaft is provided with a conical surface, and a chamfer matched with the conical surface on the centering guide shaft is arranged on the inner side of the end, close to the transmission shaft, of the centering guide cylinder, so that self-adaptive centering of the transmission shaft and the roller shaft is achieved. According to the utility model, the single roll changing time can be shortened to one third of the original time, the labor production efficiency is effectively improved, in addition, the consumption of various tons of steel of the whole production line is correspondingly reduced along with the improvement of the production efficiency, the remarkable economic benefits of increasing production and income of enterprises are finally achieved, and meanwhile, conditions are created for building intelligent factories.

Description

Technical Field

[0001] The utility model belongs to the field of hot-rolled steel pipe rolling equipment in the iron and steel metallurgical industry and relates to a self-adaptive shaft alignment device. Background Art

[0002] As one of the key equipment in the three hot rolling deformation processes in the production of seamless steel pipes, the continuous tube mill has been widely favored by domestic and foreign customers since its birth in the 1980s due to its high surface quality, high wall thickness accuracy, high yield rate and wide range of product specifications. The roll frame of the continuous tube mill adopts a three-roll compact layout, each roll is driven by a set of transmission devices, and the roll frame can be replaced laterally as a whole.

[0003] For a set of continuous tube mills, there will be frequent roll replacement needs every year due to roll life, gauge change, production accidents, etc. According to production practice experience, the three-roll continuous tube mill frequently replaces the roll frame due to production needs, and the number of times and time are long. If there are medium and large diameter mills with more than two hole types, the number and time of roll replacement will increase exponentially.

[0004] Each roll of the continuous tube mill is connected to the transmission device through a transmission shaft. When changing rolls, the transmission shaft is disengaged from the roll shaft, the old roll frame is removed, and the new roll frame is pushed in, and then the transmission shaft is docked with the new roll shaft. However, this docking process is the most time-consuming and labor-intensive, and it is the key factor that restricts the entire roll changing process from being completed quickly and efficiently. In the process of docking the transmission shaft and the roll, due to the low positioning accuracy of the transmission shaft and the small tooth gap of the drum gear, docking is difficult. At the same time, factors such as low installation accuracy, inaccurate debugging, improper operation, foundation settlement, and equipment aging will cause difficulties in docking the transmission shaft and the roll. In actual operation, it is necessary to manually go to the side of the transmission shaft head to observe the docking of the shaft, and communicate and coordinate with the operating table through the intercom, which greatly affects the efficiency of roll changing.

[0005] Therefore, there is an urgent need to propose a rapid shaft alignment solution to shorten the time for a single roll change and improve labor productivity, so as to ultimately achieve the goal of increasing production and revenue for the enterprise, while creating conditions for building an intelligent factory. Utility Model Content

[0006] In view of this, an object of the present invention is to provide an adaptive shaft alignment device to solve the problems raised in the background technology.

[0007] In order to achieve the above object, the utility model provides the following technical solutions:

[0008] An adaptive shaft alignment device is used to assist the alignment of a transmission shaft and a roller shaft in a continuous tube mill, comprising a centering guide shaft and a centering guide cylinder matched with the centering guide shaft, wherein the centering guide shaft is fixedly connected to one end of the transmission shaft close to the roller shaft, and the centering guide cylinder is fixedly connected to one end of the roller shaft close to the transmission shaft;

[0009] The end of the centering guide shaft has a conical surface, and a chamfer matching the conical surface on the centering guide shaft is provided on the inner side of one end of the centering guide cylinder close to the transmission shaft, so as to realize adaptive centering of the transmission shaft and the roller shaft.

[0010] Furthermore, the centering guide shaft is connected to the transmission shaft via a first flange.

[0011] Furthermore, the centering guide cylinder is connected to the roller shaft via a second flange.

[0012] Furthermore, a first pair of tooth bevel sliding surfaces is provided on the outer side of the centering guide shaft, and a second pair of tooth bevel sliding surfaces matching the first pair of tooth bevel sliding surfaces is provided on the outer side of the centering guide cylinder, and the installation positions of the first pair of tooth bevel sliding surfaces and the second pair of tooth bevel sliding surfaces correspond to the external teeth on the transmission shaft and the internal teeth of the roller shaft, so that the roller shaft rotates under the rubbing of the first pair of tooth bevel sliding surfaces and the second pair of tooth bevel sliding surfaces, thereby realizing the positioning of the external teeth on the transmission shaft and the internal teeth of the roller shaft.

[0013] Furthermore, the first pair of toothed oblique sliding surfaces are fixedly connected to the first flange, and there is a gap between the first pair of toothed oblique sliding surfaces and the centering guide shaft to prevent them from interfering with the centering guide shaft being inserted into the centering guide cylinder;

[0014] The second pair of tooth inclined sliding surfaces are fixedly connected to the second flange and correspond to the positions of the first pair of tooth inclined sliding surfaces.

[0015] Furthermore, the number of the first pair of tooth inclined sliding surfaces is two and they are arranged oppositely on the first flange, and the number of the second pair of tooth inclined sliding surfaces is two and they are arranged oppositely on the second flange.

[0016] Furthermore, the first flange and the second flange are provided with bolt holes to facilitate fixed connection between the transmission shaft and the roller shaft.

[0017] The beneficial effects of the utility model are:

[0018] The utility model provides an adaptive shaft alignment device, which can shorten the single roller changing time to one third of the original time, effectively improve labor productivity, and ultimately achieve significant economic benefits of increased production and revenue for the enterprise; in addition, with the improvement of production efficiency, the various tons of steel consumption of the entire production line will be reduced accordingly, which means that it will bring additional "cost reduction and efficiency improvement" effects, while creating conditions for building an intelligent factory.

[0019] Secondly, the adaptive shaft alignment device has an easy structure, is stable and reliable, easy to debug and maintain, easy to install and disassemble, and has simple spare parts in small quantities. The shaft and gear alignment are completed at one time, with a high level of automation control, and automatic centering is efficient and convenient, which greatly shortens the roll changing time of the continuous rolling mill and improves production efficiency.

[0020] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:

[0022] Figure 1 It is a structural schematic diagram of an adaptive shaft alignment device in the utility model;

[0023] Figure 2 It is a schematic diagram of the use state of an adaptive shaft alignment device (before the transmission shaft and the roller shaft are engaged);

[0024] Figure 3 It is a schematic diagram of the use state of an adaptive shaft alignment device (the transmission shaft and the roller shaft are in meshing state);

[0025] Figure 4 It is a schematic diagram of the use state of an adaptive shaft alignment device (before the transmission shaft and the roller shaft are meshed, there is no inclined sliding surface for the teeth);

[0026] Figure 5 It is a schematic diagram of the use status of an adaptive shaft alignment device (the transmission shaft and the roller shaft are in full meshing state, and there is no inclined sliding surface for the teeth).

[0027] Reference numerals: centering guide shaft 1 , centering guide cylinder 2 , first pair of tooth inclined sliding surfaces 3 , second pair of tooth inclined sliding surfaces 4 , first flange 5 , second flange 6 . DETAILED DESCRIPTION

[0028] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0029] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present utility model. In order to better illustrate the embodiments of the present utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0030] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] Example 1

[0032] See also Figure 1 to Figure 5 , is an adaptive shaft alignment device, comprising a centering guide shaft 1 and a centering guide cylinder 2 matched with the centering guide shaft 1, wherein the centering guide shaft 1 is fixedly connected to one end of the transmission shaft close to the roller shaft through a first flange 5, and the centering guide cylinder 2 is connected to one end of the roller shaft close to the transmission shaft through a second flange 6, and the end of the centering guide shaft 1 has a conical surface, and a chamfer matching the conical surface of the end of the centering guide shaft 1 is provided on the inner side of the end of the centering guide cylinder 2 close to the transmission shaft, and adaptive alignment of the transmission shaft and the roller shaft is achieved through the cooperation of the conical surface and the chamfer.

[0033] Furthermore, a first pair of tooth inclined sliding surfaces 3 is provided on the outer side of the centering guide shaft 1, and a second pair of tooth inclined sliding surfaces 4 matching the first pair of tooth inclined sliding surfaces 3 is provided on the outer side of the centering guide cylinder 2, and the installation positions of the first pair of tooth inclined sliding surfaces 3 and the second pair of tooth inclined sliding surfaces 4 correspond to the external teeth on the transmission shaft and the internal teeth of the roller shaft, so as to realize the positioning of the external teeth (tooth columns) on the transmission shaft and the internal teeth (tooth grooves) of the roller shaft, thereby making the external teeth on the transmission shaft mesh smoothly with the internal teeth of the roller shaft.

[0034] Specifically, the first pair of tooth inclined sliding surfaces 3 are fixedly connected to the first flange 5 , and have a gap with the centering guide shaft 1 to prevent them from interfering with the centering guide shaft 1 being inserted into the centering guide cylinder 2 .

[0035] The second pair of tooth inclined sliding surfaces 4 are fixedly connected to the second flange 6 and correspond to the positions of the first pair of tooth inclined sliding surfaces 3 .

[0036] The specific structure of the first pair of tooth inclined sliding surfaces 3 includes inclined sliding surfaces arranged in an axial spiral along the centering guide shaft 1, and the specific structure of the second pair of tooth inclined sliding surfaces includes inclined sliding surfaces arranged in an axial spiral along the centering guide cylinder 2, and the installation position of the first pair of tooth inclined sliding surfaces 3 corresponds to the external teeth on the transmission shaft, and the installation position of the second pair of tooth inclined sliding surfaces 4 corresponds to the internal teeth of the roll shaft, so that after the two pairs of tooth inclined sliding surfaces end the sliding contact and are completely offset, the external teeth on the transmission shaft are aligned with the tooth grooves of the roll shaft, thereby realizing subsequent meshing.

[0037] Specifically, the bevel angles of the first pair of tooth inclined sliding surfaces 3 and the second pair of tooth inclined sliding surfaces 4 should at least be able to drive the transmission shaft to rotate and should be smooth and flat, and the specific angles are adaptively adjusted according to the specifications of the transmission shaft.

[0038] Preferably, there are two first pair of tooth inclined sliding surfaces 3 , which are symmetrically arranged on the first flange 5 ; there are two second pair of tooth inclined sliding surfaces 4 , which are symmetrically arranged on the second flange 6 .

[0039] Furthermore, the first flange 5 and the second flange 6 are provided with bolt holes to facilitate the fixed connection between the transmission shaft and the roller shaft.

[0040] Key References Figure 2-3 The use process of the adaptive axis device is as follows:

[0041] The centering guide shaft and the centering guide cylinder are installed on the transmission shaft and the roller shaft respectively. Before the external teeth on the transmission shaft mesh with the internal teeth on the roller shaft, the transmission shaft drives the centering guide shaft to move forward toward the roller shaft. The centering guide shaft and the centering guide cylinder are first aligned through the conical surface of the centering guide shaft 1 and the chamfer of the centering guide cylinder 2 to correct the deviation between the center line of the transmission shaft and the center line of the roller shaft.

[0042] At the same time, as the transmission shaft drives the centering guide shaft forward toward the roll shaft, the centering guide shaft and the tooth inclined sliding surfaces on the centering guide cylinder come into contact. After the tooth inclined sliding surfaces come into contact, the roll shaft rotates relative to the transmission shaft under the guidance of the tooth inclined sliding surfaces (due to the large load on the transmission shaft, it can be regarded as a fixed component, so the roll shaft rotates under the action of the tooth inclined sliding surfaces), further prompting the transmission shaft and the roll shaft to be aligned. When the first pair of tooth inclined sliding surfaces 3 and the second pair of tooth inclined sliding surfaces 4 are completely offset, the tooth column on the transmission shaft is also aligned with the tooth groove in the roll shaft, and the roll shaft also stops rotating. Under the forward action of the transmission shaft, the centering guide shaft is inserted into the centering guide cylinder, and the tooth column on the transmission shaft is inserted into the tooth groove in the roll shaft and meshes smoothly, thereby realizing the automatic centering function of the continuous rolling mill.

[0043] Specifically, the specific specifications of the conical surface and chamfer, as well as the installation position and specifications of the inclined sliding surface of the tooth can be adaptively designed according to the specifications of different continuous rolling mills and the number and module of the external teeth of the transmission shaft and the internal teeth of the roller shaft in combination with computer analysis and three-dimensional simulation analysis. This is a common technical means in the prior art. The key to this embodiment is to propose a technical solution in which a centering guide shaft cooperates with a centering guide cylinder to achieve adaptive centering of the transmission shaft and the roller shaft. It is not a specific structural parameter, so the specific structural parameters will not be repeated.

[0044] Example 2

[0045] Key References Figure 4-5 The difference between this embodiment and embodiment 1 is that the adaptive shaft alignment device in this embodiment does not include the first pair of tooth inclined sliding surfaces 3 and the second pair of tooth inclined sliding surfaces 4, but only retains the centering guide shaft 1 and the centering guide cylinder 2; at the same time, the chamfer of the end of the transmission shaft close to the roller shaft (that is, the chamfer of the outer tooth end face) and the chamfer of the end of the roller shaft close to the transmission shaft (that is, the chamfer of the inner tooth end face) are increased.

[0046] In this embodiment, the transmission shaft and the roller shaft are automatically aligned and centered under the action of the centering guide shaft 1 and the centering guide cylinder 2, and the internal and external teeth are more easily meshed due to the increased chamfers of the end faces of the internal and external teeth, thereby realizing automatic meshing of the internal and external teeth. After testing, there is a very small probability that the teeth do not mesh smoothly, but after the centering guide shaft is retracted for secondary alignment, they can mesh smoothly.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. An adaptive shaft alignment device for assisting the alignment of a transmission shaft and a roller shaft in a continuous tube mill, characterized in that: It includes a centering guide shaft and a centering guide cylinder matched with the centering guide shaft, wherein the centering guide shaft is fixedly connected to one end of the transmission shaft close to the roller shaft, and the centering guide cylinder is fixedly connected to one end of the roller shaft close to the transmission shaft; The end of the centering guide shaft has a conical surface, and a chamfer matching the conical surface on the centering guide shaft is provided on the inner side of one end of the centering guide cylinder close to the transmission shaft, so as to realize adaptive centering of the transmission shaft and the roller shaft.

2. The adaptive axis alignment device according to claim 1, characterized in that: The centering guide shaft is connected to the transmission shaft through a first flange.

3. The adaptive axis alignment device according to claim 2, characterized in that: The centering guide cylinder is connected to the roller shaft through a second flange.

4. The adaptive axis alignment device according to claim 3, characterized in that: A first pair of tooth bevel sliding surfaces is also provided on the outer side of the centering guide shaft, and a second pair of tooth bevel sliding surfaces matching the first pair of tooth bevel sliding surfaces is provided on the outer side of the centering guide cylinder, and the installation positions of the first pair of tooth bevel sliding surfaces and the second pair of tooth bevel sliding surfaces correspond to the external teeth on the transmission shaft and the internal teeth of the roller shaft, so that the roller shaft rotates under the rubbing of the first pair of tooth bevel sliding surfaces and the second pair of tooth bevel sliding surfaces, thereby realizing the positioning of the external teeth on the transmission shaft and the internal teeth of the roller shaft.

5. The adaptive axis alignment device according to claim 4, characterized in that: The first pair of toothed oblique sliding surfaces are fixedly connected to the first flange, and there is a gap between the first pair of toothed oblique sliding surfaces and the centering guide shaft to prevent them from interfering with the centering guide shaft being inserted into the centering guide cylinder; The second pair of tooth inclined sliding surfaces are fixedly connected to the second flange and correspond to the positions of the first pair of tooth inclined sliding surfaces.

6. The adaptive axis alignment device according to claim 4, characterized in that: There are two first pair of inclined sliding surfaces of teeth, which are arranged oppositely on the first flange, and there are two second pair of inclined sliding surfaces of teeth, which are arranged oppositely on the second flange.

7. The adaptive axis alignment device according to claim 4, characterized in that: The first flange and the second flange are both provided with bolt holes for fixing and connecting the transmission shaft and the roller shaft.

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