Modular adjustable roll shaft cold extrusion device

Abstract

Provided is a modular adjustable cold-state roll shaft extruding device, belonging to the technical field of equipment maintenance tools. The device comprises a pressure-bearing base frame composed of two parallel I-beam girders, a gantry type pressing frame assembly fixed to the I-beam girders, a hydraulic cylinder provided on the gantry type pressing frame assembly, and a modular support system composed of a plurality of horizontal support seats and a plurality of vertical support seats. The device adopts a modular support system composed of horizontal support seats and vertical support seats that are staggered and stacked, and by increasing or decreasing the number of support seat layers, a rigid containing space of different heights can be flexibly formed to adapt to different specifications of rolls. The device completely avoids damage to workpieces in traditional hot disassembly methods, realizes safe, efficient and non-destructive shaft pressing operation under cold conditions, and has the advantages of strong universality, stable structure and convenient operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of equipment maintenance tools, specifically relating to a modular adjustable cold extrusion device for rolling mill shafts, which is a dismantling device used to extrude shaft-type parts from large disc-type parts such as rolling mills and pulleys in a cold state. Background Technology

[0002] In industries such as metallurgy, mining, and machinery manufacturing, components like rolling mill rolls and large pulleys are typically mounted on shafts using interference fits to create a high-clamping connection. Traditional dismantling methods commonly employ a "thermal dismantling" approach, which involves heating the roll hub with a heat source such as an oxy-acetylene flame, causing it to expand and reducing the clamping force, before using a press to remove the shaft. This method has significant drawbacks: First, localized high-temperature heating alters the metallographic structure of the roll's working layer, reducing its hardness and severely impacting its service life and rolling quality. Second, improper temperature control during the heating process can easily lead to stress concentration and even cracking of the roll, causing permanent damage to valuable components. Finally, this method involves a hazardous working environment, requires highly skilled operators, and is inefficient.

[0003] Therefore, there is an urgent need for a special device that can safely, efficiently, and non-destructively separate the rolls from the shaft at room temperature (cold state) to overcome the inherent defects of the hot separation method. Utility Model Content

[0004] The technical problem solved by this utility model is to address the issues of damage to roll performance, poor safety, and low efficiency caused by the hot extrusion method in the prior art. This utility model provides a cold extrusion device that does not require heating, is safe to operate, has a wide range of applications, and can protect the performance of the workpiece.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A modular, adjustable roll shaft cold extrusion device includes: The pressure-bearing base frame consists of two parallel I-beams; The gantry-type pressure frame assembly includes two columns fixedly installed on the I-beam and a crossbeam connected to the top of the two columns. A hydraulic cylinder is vertically downward at the center of the crossbeam. The modular support system includes several horizontal support seats and several vertical support seats; the horizontal support seats are horizontally erected on the two I-beams and located on the front and rear outer sides of the gantry-type pressure frame assembly; the vertical support seats are placed longitudinally on the upper surface of the horizontal support seats and located in the internal space of the gantry-type pressure frame assembly; the horizontal and vertical support seats can be stacked in multiple layers to form a height-adjustable rigid accommodating space, and the center of the rigid accommodating space forms a pressing through hole for the shaft to fall.

[0006] As a further limitation of the above scheme, a triangular reinforcing rib is provided at the connection between the column and the beam.

[0007] As a further limitation of the above scheme, both ends of the horizontal support and the vertical support are provided with lifting rings.

[0008] Further defining the above scheme, the horizontal support and the vertical support are standardized rectangular steel components, and their number can be increased or decreased according to the size of the workpiece to be pressed out.

[0009] As a further limitation of the above scheme, the bottom of the pressure-bearing base frame is provided with anchor bolt holes or welded with anti-slip plates.

[0010] Further specifying the above scheme, the hydraulic cylinder is a separate hydraulic jack, which is connected to an external manual or electric hydraulic pump station via a high-pressure oil pipe.

[0011] Advantages of this utility model compared to the prior art: 1. This solution provides a complete cold dismantling solution, completely eliminating the heating process and fundamentally avoiding all drawbacks such as workpiece performance damage, deformation, and cracking caused by heating, thus protecting the value of valuable assets; 2. This solution achieves stepless adjustment of the support height through standardized and modular combinations of horizontal and vertical support seats. One set of equipment can perfectly adapt to workpieces such as rolls and pulleys of different specifications and sizes, making it highly versatile and solving the limitation of traditional tooling that is used for one machine at a time, thus reducing equipment investment costs; 3. This solution boasts outstanding structural rigidity and stability: it adopts a heavy-duty I-beam base and a gantry frame design with reinforcing ribs, ensuring a clear and reasonable force transmission path, a stable overall structure, and the ability to withstand enormous pressure, making operation safe and reliable; 4. This solution is easy to operate and highly efficient: The lifting ring design makes it easy and quick to adjust the heavy support base. Combined with the hydraulic system, the entire pressing process is time-saving and labor-saving, significantly improving equipment maintenance efficiency. Attached Figure Description

[0012] Figure 1 This is a front view of the structure of this utility model; Figure 2 This is a side view of the structure of this utility model. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0014] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0015] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0016] Please see Figure 1-2 The embodiments of this utility model are described in detail below.

[0017] Example: See Figure 1-2 As shown, the modular adjustable roll shaft cold extrusion device includes a pressure-bearing base frame 1, a gantry-type press assembly 2, and a modular support system.

[0018] The pressure-bearing base frame 1 is composed of two parallel heavy-duty I-beams, providing a stable foundation for the entire device. Preferably, the bottom of the pressure-bearing base frame 1 is provided with anchor bolt holes or welded with anti-slip plates to adapt to different ground conditions and prevent the device from moving under stress.

[0019] The gantry-type pressing frame assembly 2 is fixedly installed on the pressure-bearing base frame 1. It consists of two columns 2-1 and a crossbeam 2-2 connected to the top of the two columns, forming a "gate"-shaped structure. The connection between the columns 2-1 and the crossbeam 2-2 is provided with triangular reinforcing ribs 2-3, which greatly enhances the bending stiffness and stability of the pressing frame, making it suitable for large-tonnage pressing operations.

[0020] A hydraulic cylinder 3 is vertically mounted downwards at the center of the crossbeam 2-2. Preferably, the hydraulic cylinder 3 is a detachable hydraulic jack, connected to an external manual or electric hydraulic pump station via a high-pressure oil pipe.

[0021] The modular support system includes multiple standardized horizontal support seats 4 and vertical support seats 5. The horizontal support seats 4 are horizontally erected on two I-beams and located on the front and rear sides of the gantry press assembly 2. The vertical support seats 5 are placed longitudinally on the upper surface of the horizontal support seats 4 and located in the internal space of the gantry press assembly 2. The horizontal support seats 4 and vertical support seats 5 can be stacked alternately, and by combining different numbers of support seat layers, a rigid accommodating space with a height matching the flange thickness of the roll to be removed is formed in the middle. The center of this space is the extrusion hole for the shaft to fall through.

[0022] Both ends of the horizontal support base 4 and the longitudinal support base 5 are equipped with hooks, which facilitates rapid lifting and position adjustment by overhead cranes or forklifts, greatly improving the convenience of assembly and work efficiency.

[0023] The horizontal support 4 and the vertical support 5 are standardized rectangular steel components, and their number can be increased or decreased according to the size of the workpiece to be pressed out.

[0024] The working principle of this utility model is as follows: Figure 1 As shown, in actual use, firstly, based on the flange height of the roll to be removed, select an appropriate number of horizontal support seats 4 and vertical support seats 5 and stack them alternately to form a stable support platform. Use hoisting equipment to vertically lift the roll, ensuring its flange rests on the uppermost support seat, with the shaft end aligned with the piston rod of the hydraulic cylinder 3. Start the hydraulic pump station, controlling the hydraulic cylinder 3 to slowly press down. Its piston rod acts directly downwards on the shaft end in the roll, smoothly and vertically pressing the shaft out of the roll in a cold state, and allowing it to fall through the lower pressing hole. The entire process is carried out at room temperature, quickly, smoothly, and without damage.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A modular adjustable roll shaft cold extrusion device, characterized in that: include: The pressure-bearing base frame (1) is composed of two parallel I-beams; The gantry-type pressure frame assembly (2) includes two columns (2-1) fixedly installed on the I-beam and a crossbeam (2-2) connected to the top of the two columns. A hydraulic cylinder (3) is provided vertically downward at the center of the crossbeam (2-2). The modular support system includes several horizontal support seats (4) and several vertical support seats (5); the horizontal support seats (4) are horizontally erected on the two I-beams and located on the front and rear sides of the gantry press assembly (2); the vertical support seats (5) are placed longitudinally on the upper surface of the horizontal support seats (4) and located in the internal space of the gantry press assembly (2); the horizontal support seats (4) and the vertical support seats (5) can be stacked in multiple layers to form a height-adjustable rigid accommodating space, and the middle of the rigid accommodating space forms a press-out through hole for the shaft to fall.

2. The modular adjustable roll shaft cold extrusion device according to claim 1, characterized in that: The connection between the column (2-1) and the beam (2-2) is provided with a triangular reinforcing rib plate (2-3).

3. The modular adjustable roll shaft cold extrusion device according to claim 1, characterized in that: Both ends of the horizontal support (4) and the vertical support (5) are provided with lifting rings.

4. The modular adjustable roll shaft cold extrusion device according to claim 1, characterized in that: The horizontal support (4) and the vertical support (5) are standardized rectangular steel components, and their number can be increased or decreased according to the size of the workpiece to be pressed out.

5. The modular adjustable roll shaft cold extrusion device according to claim 1, characterized in that: The bottom of the pressure-bearing base frame (1) is provided with anchor bolt holes or welded with anti-slip plates.

6. The modular adjustable roll shaft cold extrusion device according to claim 1, characterized in that: The hydraulic cylinder (3) is a separate hydraulic jack, which is connected to an external manual or electric hydraulic pump station through a high-pressure oil pipe.

Images