Laser nano-alloying roller

Abstract

The utility model provides a laser nano alloying roller, which belongs to the technical field of laser cladding, and comprises a roller shaft, a roller sleeve and a positioning sleeve, the middle part of the roller shaft is provided with a working shaft section, the working shaft section comprises a first shaft section, a second shaft section and a third shaft section which are coaxially arranged in sequence, a first shaft shoulder is formed between the first shaft section and the second shaft section, and a second shaft shoulder is formed between the second shaft section and the third shaft section. A second shaft shoulder is formed between the second shaft section and the third shaft section, the second shaft section is sleeved with the roller sleeve, a first stepped groove hole is formed in one end of the roller sleeve, the first shaft section is sleeved with the first stepped groove hole, the first stepped groove hole abuts against the first shaft shoulder, and the third shaft section is sleeved with the positioning sleeve. One end of the positioning sleeve extends along one end of the second shaft section and abuts against the side end face of the roller sleeve, and a plurality of connecting pieces are detachably connected to the periphery of the positioning sleeve. According to the laser nano alloying roller provided by the utility model, when the working surface of the roller sleeve is collided or deformed, the roller sleeve can be independently disassembled, and the roller does not need to be wholly disassembled or replaced, so that the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser cladding, and more specifically relates to a laser nano alloying roller. Background Art

[0002] Laser nano-alloying technology has significant advantages in roller surface modification. This technology uses high-energy lasers to act on the roller surface, causing the temperature of the local area to rise rapidly, so that the pre-implanted nano-alloy elements instantly melt and diffuse into the roller surface, forming an alloy layer with a nano-scale grain structure. This method can not only significantly improve the surface hardness and wear resistance of the roller, but also improve its fatigue resistance and corrosion resistance.

[0003] The alloy layer on the surface of the roller can greatly improve its wear resistance. The surface of the roller is the main working surface. During the continuous production process, the alloy layer will be deformed due to high temperature, or the alloy layer will be damaged due to bumps. At this time, the roller needs to be disassembled as a whole and the surface of the roller needs to be alloyed again. When the deformation or bumps are serious, the entire roller needs to be replaced, which will increase the cost. Utility Model Content

[0004] The utility model aims to provide a laser nano alloying roller, aiming to solve the problem that the roller surface needs to be completely disassembled for alloying again due to deformation or bumping, or even the roller needs to be replaced as a whole, which increases costs.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a laser nano-alloyed rolling roller, including a roller shaft, a roller sleeve and a positioning sleeve, the middle part of the roller shaft is provided with a working shaft section, the working shaft section includes a first shaft section, a second shaft section and a third shaft section which are coaxially arranged in sequence, the outer diameters of the first shaft section, the second shaft section and the third shaft section decrease in sequence, a first shaft shoulder is formed between the first shaft section and the second shaft section, a second shaft shoulder is formed between the second shaft section and the third shaft section, the roller sleeve is sleeved on the second shaft section, one end of the roller sleeve is provided with a first stepped groove hole, the first stepped groove hole is sleeved on the first shaft section and abuts on the first shaft shoulder, the positioning sleeve is sleeved on the third shaft section, one end of the positioning sleeve extends along one end of the second shaft section and abuts on the side end face of the roller sleeve, and the outer periphery of the positioning sleeve is detachably connected with a plurality of connecting members for connecting the third shaft section.

[0006] In a possible implementation, a plurality of positioning grooves are circumferentially provided on the first shoulder, a plurality of positioning inserts are circumferentially provided on the first stepped slot, and the positioning inserts are axially inserted into the plurality of positioning grooves in a one-to-one correspondence.

[0007] In a possible implementation, the positioning plug block is a trapezoidal block, both sides of the trapezoidal block are provided with guiding inclined surfaces, and the positioning groove is a trapezoidal groove, both sides of the trapezoidal groove are provided with matching inclined surfaces.

[0008] In a possible implementation, the number of the positioning plugs is three, and the three positioning plugs are all integrally formed in the circumference of the first stepped slot.

[0009] In a possible implementation, a plurality of connecting holes are radially opened on the outer circumference of the positioning sleeve, a plurality of threaded holes are correspondingly arranged on the outer circumference of the third shaft segment, the plurality of connecting holes and the plurality of threaded holes are coaxially arranged one by one, the connecting member is a connecting bolt, and the connecting bolt passes through the corresponding connecting holes and the threaded holes.

[0010] In a possible implementation, a countersunk hole is provided at the outer end of the connecting hole, and the countersunk hole is used to accommodate a nut end of the connecting bolt.

[0011] In a possible implementation manner, an alloy layer is provided on the outer surface of the roller sleeve.

[0012] In a possible implementation, the thickness of the alloy layer is not less than 5 mm.

[0013] The beneficial effect of the laser nano alloying roller provided by the utility model is that: compared with the prior art, the working shaft section of the roller shaft includes a first shaft section, a second shaft section and a third shaft section which are coaxially arranged in sequence, the roller sleeve is sleeved on the second shaft section, the first stepped groove hole of the roller sleeve is sleeved on the first shaft section and abuts on the first shaft shoulder between the first shaft section and the second shaft section, the positioning sleeve is sleeved on the third shaft section, one end of the positioning sleeve abuts on the side end surface of the roller sleeve, and in addition, the outer periphery of the positioning sleeve is detachably connected with a plurality of connecting pieces, and the plurality of connecting pieces connect the positioning sleeve to the third shaft section, thereby forming a positioning for the positioning sleeve. When the roller sleeve needs to be disassembled for maintenance and replacement, the plurality of connecting pieces are removed, and then the positioning sleeve is removed from the third shaft section, and finally the roller sleeve is removed along the axial direction of the working shaft section. The laser nano alloying roller provided by the utility model can remove the roller sleeve alone when the working surface of the roller sleeve is bumped or deformed, without the need to disassemble or replace the roller as a whole, thereby reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1A schematic diagram of the structure of a laser nano-alloyed roller provided in an embodiment of the utility model;

[0016] Figure 2 A cross-sectional view of a laser nano-alloyed roller provided in an embodiment of the utility model;

[0017] Figure 3 A schematic diagram of the structure of a roller provided in an embodiment of the utility model;

[0018] Figure 4 A schematic diagram of the structure of a roller sleeve provided in an embodiment of the utility model;

[0019] Figure 5 A schematic structural diagram of a positioning sleeve provided in an embodiment of the utility model.

[0020] In the figure: 1, first shaft section; 2, second shaft section; 3, third shaft section; 4, first shaft shoulder; 5, second shaft shoulder; 6, first stepped groove hole; 7, roller sleeve; 8, positioning sleeve; 9, positioning groove; 10, positioning plug; 11, connecting hole; 12, threaded hole; 13, connecting bolt; 14, countersunk hole; 15, alloy layer. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0023] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", "high", "low", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the utility model.

[0024] See also Figure 1 and Figure 2, the laser nano alloying roller provided by the utility model is now described. The laser nano alloying roller comprises a roller shaft, a roller sleeve 7 and a positioning sleeve 8, the middle part of the roller shaft is provided with a working shaft section, the working shaft section comprises a first shaft section 1, a second shaft section 2 and a third shaft section 3 which are coaxially arranged in sequence, the outer diameters of the first shaft section 1, the second shaft section 2 and the third shaft section 3 decrease in sequence, a first shaft shoulder 4 is formed between the first shaft section 1 and the second shaft section 2, and a second shaft shoulder 5 is formed between the second shaft section 2 and the third shaft section 3, the roller sleeve 7 is sleeved on the second shaft section 2, one end of the roller sleeve 7 is provided with a first stepped groove hole 6, the first stepped groove hole 6 is sleeved on the first shaft section 1 and abuts on the first shaft shoulder 4, the positioning sleeve 8 is sleeved on the third shaft section 3, one end of the positioning sleeve 8 extends along one end of the second shaft section 2 and abuts on the side end surface of the roller sleeve 7, and the outer periphery of the positioning sleeve 8 is detachably connected with a plurality of connectors for connecting the third shaft section 3.

[0025] Compared with the prior art, the laser nano alloying roller provided by the utility model has a working shaft section of the roller shaft including a first shaft section 1, a second shaft section 2 and a third shaft section 3 which are coaxially arranged in sequence, a roller sleeve 7 is sleeved on the second shaft section 2, a first stepped slot hole 6 of the roller sleeve 7 is sleeved on the first shaft section 1 and abuts on the first shaft shoulder 4 between the first shaft section 1 and the second shaft section 2, a positioning sleeve 8 is sleeved on the third shaft section 3, one end of the positioning sleeve 8 abuts on the side end surface of the roller sleeve 7, and in addition, the outer periphery of the positioning sleeve 8 is detachably connected with a plurality of connecting pieces, and the plurality of connecting pieces connect the positioning sleeve 8 to the third shaft section 3, thereby forming a positioning for the positioning sleeve 8. When the roller sleeve 7 needs to be disassembled for maintenance and replacement, the plurality of connecting pieces are removed, and then the positioning sleeve 8 is removed from the third shaft section 3, and finally the roller sleeve 7 is removed along the axial direction of the working shaft section. The laser nano alloying roller provided by the utility model can remove the roller sleeve 7 separately when the working surface of the roller sleeve 7 is bumped or deformed, without the need to disassemble or replace the roller as a whole, thereby reducing the maintenance cost.

[0026] See also Figures 2 to 4 The first shoulder 4 is circumferentially provided with a plurality of positioning grooves 9, and the first stepped groove hole 6 is circumferentially provided with a plurality of positioning plugs 10, and the positioning plugs 10 are axially inserted into the plurality of positioning grooves 9 one by one, thereby limiting the rotation of the roller sleeve 7 relative to the roller shaft.

[0027] Preferably, the positioning block 10 is a trapezoidal block with guiding bevels on both sides, and the positioning groove 9 is a trapezoidal groove with matching bevels on both sides. The positioning block 10 can be smoothly inserted into the corresponding positioning groove 9 through the guiding bevels and the matching bevels.

[0028] Specifically, there are three positioning blocks 10, and the three positioning blocks 10 are all integrally formed in the circumference of the first stepped slot 6, thereby forming three positioning structures in the circumference to improve the stability of the roller sleeve 7 relative to the roller shaft.

[0029] See also Figure 2 , Figure 3 and Figure 5 A plurality of connecting holes 11 are radially opened on the outer circumference of the positioning sleeve 8, and a plurality of threaded holes 12 are correspondingly arranged on the outer circumference of the third shaft segment 3. The plurality of connecting holes 11 and the plurality of threaded holes 12 are coaxially arranged one by one. The connecting piece is a connecting bolt 13, which passes through the corresponding connecting hole 11 and is threadedly connected in the threaded hole 12 to fix the positioning sleeve 8 on the third shaft segment 3 to avoid axial displacement of the positioning sleeve 8 relative to the roller shaft, thereby forming axial positioning of the roller sleeve 7.

[0030] A second stepped groove hole is provided at one end of the positioning sleeve 8 close to the second shaft section 2, and the second stepped groove hole abuts against the end face of the second shaft shoulder 5. At this time, one end of the positioning sleeve 8 abuts against the side end face of the roller sleeve 7. After the positioning sleeve 8 is rotated to make the connecting hole 11 and the threaded hole 12 coaxial, they are connected with the connecting bolts 13.

[0031] Preferably, a countersunk hole 14 is provided at the outer end of the connecting hole 11, and the countersunk hole 14 is used to accommodate the nut end of the connecting bolt 13 to prevent the nut end of the bolt from protruding from the outer surface of the positioning sleeve 8 and affecting normal production.

[0032] In addition, an alloy layer 15 is provided on the outer surface of the roller sleeve 7. The high-energy laser acts on the outer surface of the roller sleeve 7, causing the temperature of the local area to rise rapidly, so that the pre-implanted nano alloy elements are instantly melted and diffused into the surface layer of the roller sleeve 7, forming an alloy layer 15 with a nano-scale grain structure. The thickness of the alloy layer 15 is not less than 5 mm.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Laser nano alloying roller, characterized in that: The invention comprises a roller shaft, a roller sleeve (7) and a positioning sleeve (8), wherein the middle part of the roller shaft is provided with a working shaft section, wherein the working shaft section comprises a first shaft section (1), a second shaft section (2) and a third shaft section (3) which are coaxially arranged in sequence, wherein the outer diameters of the first shaft section (1), the second shaft section (2) and the third shaft section (3) decrease in sequence, wherein a first shaft shoulder (4) is formed between the first shaft section (1) and the second shaft section (2), and a second shaft shoulder (5) is formed between the second shaft section (2) and the third shaft section (3), wherein the roller sleeve ( 7) is sleeved on the second shaft segment (2), one end of the roller sleeve (7) is provided with a first stepped groove hole (6), the first stepped groove hole (6) is sleeved on the first shaft segment (1) and abuts against the first shaft shoulder (4), the positioning sleeve (8) is sleeved on the third shaft segment (3), one end of the positioning sleeve (8) extends along one end of the second shaft segment (2) and abuts against the side end surface of the roller sleeve (7), and the outer periphery of the positioning sleeve (8) is detachably connected with a plurality of connecting parts for connecting the third shaft segment (3).

2. The laser nano-alloyed roller according to claim 1, characterized in that: The first shaft shoulder (4) is provided with a plurality of positioning grooves (9) in the circumferential direction, and the first stepped slot hole (6) is provided with a plurality of positioning inserts (10) in the circumferential direction, and the positioning inserts (10) are axially inserted into the plurality of positioning grooves (9) in a one-to-one correspondence.

3. The laser nano-alloyed roller according to claim 2, characterized in that: The positioning plug block (10) is a trapezoidal block, and both sides of the trapezoidal block are respectively provided with guiding inclined surfaces; the positioning groove (9) is a trapezoidal groove, and both sides of the trapezoidal groove are respectively provided with matching inclined surfaces.

4. The laser nano-alloyed roller according to claim 2, characterized in that: The number of the positioning plug blocks (10) is three, and the three positioning plug blocks (10) are all integrally formed in the circumference of the first stepped slot hole (6).

5. The laser nano-alloyed roller according to claim 1, characterized in that: The outer circumference of the positioning sleeve (8) is radially provided with a plurality of connecting holes (11), and the outer circumference of the third shaft section (3) is correspondingly provided with a plurality of threaded holes (12). The plurality of connecting holes (11) and the plurality of threaded holes (12) are coaxially arranged one by one. The connecting member is a connecting bolt (13), and the connecting bolt (13) passes through the corresponding connecting hole (11) and the threaded hole (12).

6. The laser nano-alloyed roller according to claim 5, characterized in that: The outer end of the connecting hole (11) is provided with a countersunk hole (14), and the countersunk hole (14) is used to accommodate the nut end of the connecting bolt (13).

7. The laser nano-alloyed roller according to claim 1, characterized in that: The outer surface of the roller sleeve (7) is provided with an alloy layer (15).

8. The laser nano-alloyed roller according to claim 7, characterized in that: The thickness of the alloy layer (15) is not less than 5 mm.

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