Structure and preparation method of hard alloy roller
The fixing structure, which uses left-hand and right-hand rotating nuts to engage and tighten, solves the problem of loose carbide rolls, achieving efficient maintenance and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-31
- Publication Date
- 2026-04-03
AI Technical Summary
Traditional cemented carbide rolls are prone to loosening during use, requiring them to be returned to the manufacturer for replacement during maintenance, resulting in low production efficiency and high costs.
The structure uses a left-hand and right-hand screw nut for tightening and fixing, and a rack-shaped groove is set on the contact surface of the nut to achieve the meshing and tightening of the nut and prevent the alloy from loosening.
It improves the fixing firmness of cemented carbide rolls, simplifies the maintenance process, saves maintenance waiting time, and reduces production costs.
Smart Images
Figure CN121776249A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of cemented carbide manufacturing technology, specifically to the structure and preparation method of a cemented carbide roll. Background Technology
[0002] With the rapid development of my country's steel industry, the metallurgical roll manufacturing industry is also expanding, leading to increasingly higher quality requirements for rolled products. However, due to its overall low technological level and lack of products with core competitiveness, most enterprises' products remain at a low-end level. This results in the current reliance on imports for high-end roll products. Therefore, improving my country's roll manufacturing level, especially the technology for manufacturing high-end products with independent intellectual property rights, is particularly urgent from the perspective of economic and technological self-reliance.
[0003] Due to its advantages of high temperature hardness, high compressive strength, and good wear resistance, cemented carbide rolls have been put into large-scale steel rolling production.
[0004] Traditional roll structures use nuts, washers, and threaded adhesive to secure the carbide during production, then use bolts to tighten the nuts. This structure has several drawbacks, as observed in actual production and use: ① The carbide tends to loosen after a period of use. ② When the roll wears out or the carbide needs replacement, it must be returned to the manufacturer. The nuts must be broken to remove the carbide, which can easily damage and deform the shaft. The washers and nuts also need to be replaced, and the shaft needs to be re-machined. This results in low production efficiency and increased production costs.
[0005] The information disclosed in the above background section is only intended to enhance the understanding of the overall background of the present invention, and should not be construed as an admission or implication in any way that such information constitutes prior art known to those skilled in the art. Summary of the Invention
[0006] To address the aforementioned shortcomings, the present invention aims to provide a structure and manufacturing method for a cemented carbide roll, which is secured by tightening two nuts with left and right rotations, making the nuts more secure and preventing the cemented carbide ring from loosening.
[0007] To achieve the above objectives, the present invention adopts the following technical solution:
[0008] A structure for a cemented carbide roll includes a shaft, a threaded sleeve, a cemented carbide ring, a left-hand nut, and a right-hand nut. The shaft passes through the threaded sleeve, the cemented carbide ring, the left-hand nut, and the right-hand nut sequentially from left to right. The threaded sleeve is fixed to the shaft. One end of the cemented carbide ring abuts against the threaded sleeve, and the other end of the cemented carbide ring abuts against one end of the left-hand nut. The other end of the left-hand nut abuts against the right-hand nut. A first step, a second step, and a third step are sequentially arranged on the right side of the shaft, from high to low. The first step is adapted to the cemented carbide ring. The second step has a left-hand external thread adapted to the left-hand nut. The third step has a right-hand thread adapted to the right-hand nut.
[0009] A structure for a cemented carbide roll includes a shaft, a threaded sleeve, a cemented carbide ring, a left-hand nut, and a right-hand nut. The shaft passes through the threaded sleeve, the cemented carbide ring, the right-hand nut, and the left-hand nut sequentially from left to right. The threaded sleeve is fixed to the shaft. One end of the cemented carbide ring abuts against the threaded sleeve, and the other end of the cemented carbide ring abuts against one end of the right-hand nut. The other end of the right-hand nut abuts against the left-hand nut. A first step, a second step, and a third step are sequentially arranged on the right side of the shaft from high to low on the shaft with the threaded sleeve. The first step is adapted to the cemented carbide ring. The second step has a right-hand external thread adapted to the right-hand nut. The third step has a left-hand thread adapted to the left-hand nut.
[0010] Furthermore, rack-shaped grooves are provided on the contact surfaces of the left-hand and right-hand nuts.
[0011] A method for preparing a cemented carbide roll includes the following steps:
[0012] S1: Roughly machine the first step, the second step, and the third step on the shaft from left to right and from high to low respectively;
[0013] S2: Finely grind the first step, the second step, and the third step respectively to make their dimensions match the dimensions of the carbide ring, the left-hand nut, and the right-hand nut;
[0014] S3: Further machining on the second and third steps to produce left-hand and right-hand threads respectively, which are compatible with the internal threads of the left-hand and right-hand nuts;
[0015] S4: Machining rack-shaped grooves on the mating surfaces of left-hand and right-hand nuts;
[0016] S5: First, fix the threaded sleeve on the shaft, then install the carbide ring on the first step, screw the left-hand nut into the second step, and screw the right-hand nut into the third step until the toothed grooves on the contact surfaces of the left-hand nut and the right-hand nut mesh and bite together, thus completing the preparation of the carbide roll.
[0017] A method for preparing a cemented carbide roll includes the following steps:
[0018] S1: Roughly machine the first step, the second step, and the third step on the shaft from left to right and from high to low respectively;
[0019] S2: Finely grind the first step, the second step, and the third step respectively to make their dimensions match the dimensions of the carbide ring, the right-hand nut, and the left-hand nut;
[0020] S3: Further machining on the second and third steps to produce right-hand and left-hand threads respectively, which are compatible with the internal threads of right-hand and left-hand nuts;
[0021] S4: Machining rack-shaped grooves on the mating surfaces of right-hand and left-hand nuts;
[0022] S5: First, fix the threaded sleeve on the shaft, then install the carbide ring on the first step, screw the right-hand nut into the second step, and screw the left-hand nut into the third step until the toothed grooves on the contact surfaces of the left-hand nut and the right-hand nut mesh and bite together, thus completing the preparation of the carbide roll.
[0023] Compared with the prior art, the present invention has the following beneficial effects:
[0024] This invention replaces the traditional roll structure with a two-nut design, one left-handed and one right-handed, for secure clamping. Each nut has N toothed grooves on its contact surface. When tightened, the nuts mesh and lock together, ensuring a more secure fit and preventing alloy loosening. Furthermore, when the alloy roll requires maintenance, simply unscrewing the nuts eliminates the need to return it to the manufacturer, saving maintenance waiting time. This invention facilitates maintenance, improves efficiency, and reduces production costs. Attached Figure Description
[0025] Figure 1 Here is a schematic diagram of a traditional rolling mill roll structure.
[0026] Figure 2 Here is a schematic diagram of the cemented carbide roll structure of the present invention;
[0027] Figure 3 Here is a schematic diagram of the nut structure of the present invention;
[0028] In the diagram: 1-shaft; 2-threaded sleeve; 3-carbide ring; 4-left-handed nut; 5-right-handed nut; 6-first step; 7-second step; 8-third step; 9-rack groove. Detailed Implementation
[0029] To explain the technical content, objectives, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings. In the description of these embodiments, it should be understood that terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing these embodiments and simplifying the description, and are not intended to 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 the present invention.
[0030] Example 1
[0031] like Figure 2 As shown, a structure of a cemented carbide roll includes a shaft body 1, a threaded sleeve 2, a cemented carbide ring 3, a left-hand nut 4, and a right-hand nut 5. The shaft body 1 passes through the threaded sleeve 2, the cemented carbide ring 3, the left-hand nut 4, and the right-hand nut 5 sequentially from left to right. The threaded sleeve 2 is fixed on the shaft body 1. One end of the cemented carbide ring 3 abuts against the threaded sleeve 2, and the other end of the cemented carbide ring 3 abuts against one end of the left-hand nut 4. The other end of the left-hand nut 4 abuts against the right-hand nut 5. On the right side of the shaft body of the threaded sleeve 2, a first step 6, a second step 7, and a third step 8 are sequentially arranged from high to low. The first step 6 is adapted to the cemented carbide ring 3. The second step 7 is provided with a left-hand external thread, adapted to the left-hand nut 4. The third step 8 is provided with a right-hand thread, adapted to the right-hand nut 5.
[0032] In this embodiment, a rack-shaped groove 9 is provided on the contact surface of the left-handed nut 4 and the right-handed nut 5.
[0033] Example 2
[0034] Unlike the above embodiments, another structure of the carbide roll includes a shaft 1, a threaded sleeve 2, a carbide ring 3, a left-hand nut 4, and a right-hand nut 5. The shaft 1 passes through the threaded sleeve 2, the carbide ring 3, the right-hand nut 5, and the left-hand nut 4 sequentially from left to right. The threaded sleeve 2 is fixed to the shaft 1. One end of the carbide ring 3 abuts against the threaded sleeve 2, and the other end of the carbide ring 3 abuts against one end of the right-hand nut 5. The other end of the right-hand nut 5 abuts against the left-hand nut 4. On the right side of the shaft 1, from high to low, a first step 6, a second step 7, and a third step 8 are sequentially arranged. The first step 6 is adapted to the carbide ring 3. The second step 7 is provided with a right-hand external thread, adapted to the right-hand nut 5. The third step 8 is provided with a left-hand thread, adapted to the left-hand nut 4.
[0035] In this embodiment, a rack-shaped groove 9 is provided on the contact surface of the left-handed nut 4 and the right-handed nut 5.
[0036] Example 3
[0037] The cemented carbide roll structure described in Example 1 is prepared by the following steps:
[0038] S1: Roughly machine the first step 6, the second step 7, and the third step 8 from left to right and from high to low on the shaft 1 respectively;
[0039] S2: Finely grind the first step 6, the second step 7 and the third step 8 respectively to make their dimensions match the dimensions of the carbide ring 3, the left-hand nut 4 and the right-hand nut 5;
[0040] S3: Further machining is performed on the second step 7 and the third step 8 to produce left-hand threads and right-hand threads respectively, which are adapted to the internal threads of the left-hand nut 4 and the right-hand nut 5.
[0041] S4: Machining rack-shaped groove 9 on the mating surfaces of left-hand nut 4 and right-hand nut 5;
[0042] S5: First, fix the thread sleeve 2 on the shaft 1, then install the carbide ring 3 on the first step 6, screw the left-hand nut 4 into the second step 7, and screw the right-hand nut 5 into the third step 8 until the toothed grooves on the contact surfaces of the left-hand nut 4 and the right-hand nut 5 mesh and bite together, thus completing the preparation of the carbide roll.
[0043] Example 4
[0044] The cemented carbide roll structure described in Example 2 is prepared by the following steps:
[0045] A method for preparing a cemented carbide roll includes the following steps:
[0046] S1: Roughly machine the first step 6, the second step 7, and the third step 8 from left to right and from high to low on the shaft 1 respectively;
[0047] S2: Finely grind the first step 6, the second step 7 and the third step 8 respectively to make their dimensions match the dimensions of the carbide ring 3, the right-hand nut 5 and the left-hand nut 4;
[0048] S3: Further machining is performed on the second step 7 and the third step 8 to produce right-hand threads and left-hand threads respectively, which are compatible with the internal threads of the right-hand nut 5 and the left-hand nut 4.
[0049] S4: Machining rack-shaped groove 9 on the mating surfaces of right-hand nut 5 and left-hand nut 4;
[0050] S5: First, fix the threaded sleeve 2 on the shaft 1, then install the carbide ring 3 on the first step 6, screw the right-hand nut 5 into the second step 7, and screw the left-hand nut 4 into the third step 8 until the toothed grooves on the contact surfaces of the left-hand nut 4 and the right-hand nut 5 mesh and bite together, thus completing the preparation of the carbide roll.
[0051] This invention replaces the traditional roll structure with a two-nut design, one left-handed and one right-handed, for secure clamping. Each nut has N toothed grooves on its contact surface. When tightened, the nuts mesh and lock together, ensuring a more secure fit and preventing alloy loosening. Furthermore, when the alloy roll requires maintenance, simply unscrewing the nuts eliminates the need to return it to the manufacturer, saving maintenance waiting time. This invention facilitates maintenance, improves efficiency, and reduces production costs.
[0052] Although the present invention has been described in detail above with specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.
Claims
1. A structure for a cemented carbide roll, characterized in that: The device includes a shaft, a threaded sleeve, a carbide ring, a left-hand nut, and a right-hand nut. The shaft passes through the threaded sleeve, the carbide ring, the left-hand nut, and the right-hand nut sequentially from left to right. The threaded sleeve is fixed to the shaft. One end of the carbide ring abuts against the threaded sleeve, and the other end of the carbide ring abuts against one end of the left-hand nut. The other end of the left-hand nut abuts against the right-hand nut. On the right side of the shaft with the threaded sleeve, a first step, a second step, and a third step are sequentially arranged from high to low. The first step is adapted to the carbide ring. The second step has a left-hand external thread adapted to the left-hand nut. The third step has a right-hand thread adapted to the right-hand nut.
2. A structure of a cemented carbide roll, characterized in that: The device includes a shaft, a threaded sleeve, a carbide ring, a left-hand nut, and a right-hand nut. The shaft passes through the threaded sleeve, the carbide ring, the right-hand nut, and the left-hand nut sequentially from left to right. The threaded sleeve is fixed to the shaft. One end of the carbide ring abuts against the threaded sleeve, and the other end of the carbide ring abuts against one end of the right-hand nut. The other end of the right-hand nut abuts against the left-hand nut. On the right side of the shaft with the threaded sleeve, a first step, a second step, and a third step are sequentially arranged from high to low. The first step is adapted to the carbide ring. The second step has a right-hand external thread adapted to the right-hand nut. The third step has a left-hand thread adapted to the left-hand nut.
3. The structure of a cemented carbide roll according to any one of claims 1-2, characterized in that: The contact surfaces of the left-hand and right-hand nuts are provided with rack-shaped grooves.
4. A method for preparing a cemented carbide roll, characterized in that: Includes the following steps: S1: Roughly machine the first step, the second step, and the third step on the shaft from left to right and from high to low respectively; S2: Finely grind the first step, the second step, and the third step respectively to make their dimensions match the dimensions of the carbide ring, the left-hand nut, and the right-hand nut; S3: Further machining on the second and third steps to produce left-hand and right-hand threads respectively, which are compatible with the internal threads of the left-hand and right-hand nuts; S4: Machining rack-shaped grooves on the mating surfaces of left-hand and right-hand nuts; S5: First, fix the threaded sleeve on the shaft, then install the carbide ring on the first step, screw the left-hand nut into the second step, and screw the right-hand nut into the third step until the toothed grooves on the contact surfaces of the left-hand nut and the right-hand nut mesh and bite together, thus completing the preparation of the carbide roll.
5. A method for preparing a cemented carbide roll, characterized in that: Includes the following steps: S1: Roughly machine the first step, the second step, and the third step on the shaft from left to right and from high to low respectively; S2: Finely grind the first step, the second step, and the third step respectively to make their dimensions match the dimensions of the carbide ring, the right-hand nut, and the left-hand nut; S3: Further machining on the second and third steps to produce right-hand and left-hand threads respectively, which are compatible with the internal threads of right-hand and left-hand nuts; S4: Machining rack-shaped grooves on the mating surfaces of right-hand and left-hand nuts; S5: First, fix the threaded sleeve on the shaft, then install the carbide ring on the first step, screw the right-hand nut into the second step, and screw the left-hand nut into the third step until the toothed grooves on the contact surfaces of the left-hand nut and the right-hand nut mesh and bite together, thus completing the preparation of the carbide roll.