Metal guide rail with surface reinforcement structure

Abstract

The utility model relates to mechanical drive technical field, concretely is a kind of metal guide rail with surface strengthening structure, including guide rail main body, in guide rail main body, the mounting groove is equipped in base top, slide rail is vertically fixed in mounting groove, ensure firm installation, the surface strengthening layer that slide rail outer surface covers is composed of transition layer, wear-resistant layer and anticorrosion layer, wherein transition layer uses nickel-based alloy coating, enhances and slide rail binding force;Wear-resistant layer is tungsten carbide particle coating, improves wear resistance;Anticorrosion layer uses PVD coating, effectively resists corrosion, slide rail preferably is cylindrical or long strip tubular structure, top is along the axial direction and is equipped with stress dispersion groove, can disperse working stress, in addition, slide rail inside is along the axial direction and is equipped with cooling channel, channel is arranged cross structure stiffener and is equipped with spoiler, while optimizing cooling effect, strengthen structural strength.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, specifically to a metal guide rail with a surface-strengthened structure. Background Technology

[0002] In the field of modern industrial manufacturing and automation equipment, metal guide rails, as key components for achieving precise linear motion, are widely used in CNC machine tools, automated production lines, semiconductor manufacturing equipment, and other scenarios. Their performance directly affects the processing accuracy, operational stability, and service life of the equipment.

[0003] Currently, traditional metal guide rails generally suffer from deficiencies in structural design and performance. Structurally, the main body of the guide rail often adopts a simple combination of a base and a slide rail. The way the base fixes the slide rail is not stable enough. When the equipment is running at high speed or under heavy load, problems such as slide rail loosening and displacement can easily occur, leading to a decrease in the operating accuracy of the equipment. The slide rail structure is also simple and lacks effective stress handling measures. During long-term use, stress concentration can easily cause slide rail deformation or even breakage, shortening the overall lifespan of the guide rail.

[0004] In terms of surface properties, existing guide rails have limited wear resistance and corrosion resistance. Frequent sliding of the guide rails leads to severe surface wear, reducing motion accuracy and increasing maintenance costs; in complex environments such as humidity and acid / alkali, the guide rail surface is easily corroded, further accelerating the degradation of guide rail performance. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a metal guide rail with a surface-strengthened structure.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A metal guide rail with a surface-strengthened structure, comprising a guide rail body, wherein the guide rail body comprises;

[0007] Base: The top has a mounting slot;

[0008] Slide rail: vertically fixed in the mounting groove of the base;

[0009] Surface strengthening layer: Covering the outer surface of the slide rail, the surface strengthening layer includes a transition layer, a wear-resistant layer and an anti-corrosion layer, the transition layer is located between the wear-resistant layer and the outer surface of the slide rail, and the anti-corrosion layer covers the wear-resistant layer.

[0010] Preferably, the slide rail is a cylindrical or elongated tubular structure.

[0011] More preferably, the top of the slide rail is provided with a stress dispersion groove along the axial direction.

[0012] Preferably, the transition layer is a nickel-based alloy coating, the wear-resistant layer is a tungsten carbide particle coating, and the corrosion-resistant layer is a PVD coating.

[0013] Preferably, the slide rail has a cooling channel along the axial direction inside.

[0014] More preferably, the cooling channel is provided with several reinforcing ribs.

[0015] Preferably, the reinforcing rib has a cross-shaped structure and is provided with several baffles.

[0016] Compared with the prior art, this utility model provides a metal guide rail with a surface-strengthened structure, which has the following beneficial effects:

[0017] Base and Slide Rail: The mounting groove on the top of the base provides a stable foundation for the slide rail, ensuring the overall stability of the guide rail and enabling it to withstand certain external forces without shifting during equipment operation. The vertically fixed slide rail, whether cylindrical or tubular, can adapt to different application scenarios and meet diverse usage needs.

[0018] Stress dispersion groove: The stress dispersion groove set along the axial direction on the top of the slide rail can effectively disperse the stress on the guide rail during operation, avoid damage to the slide rail caused by stress concentration, and extend the service life of the guide rail.

[0019] Surface strengthening layer efficacy

[0020] Transition layer: The transition layer, which uses a nickel-based alloy coating, can enhance the bonding force between the wear-resistant layer and the outer surface of the slide rail, so that the surface reinforcement layer and the slide rail form a tight whole, reducing the problem of reinforcement layer falling off due to poor bonding.

[0021] Wear-resistant layer: The wear-resistant layer of tungsten carbide particle coating has extremely high hardness, which can significantly improve the wear resistance of the slide rail surface, reduce the wear of the guide rail during long-term sliding, and reduce maintenance costs.

[0022] Anti-corrosion layer: The PVD coating effectively isolates external corrosive media, protecting the slide rail from corrosion. It is suitable for working environments with humid conditions and risks of chemical corrosion.

[0023] Cooling and structural reinforcement functions

[0024] Cooling channels: Cooling channels are set along the axial direction inside the slide rail, through which coolant can be introduced to remove the heat generated during the operation of the guide rail and prevent the performance of the guide rail from being affected by excessive temperature.

[0025] Reinforcing ribs and baffles: The cross-shaped reinforcing ribs not only enhance the structural strength of the slide rail, but the baffles on them also optimize the flow of coolant and improve the cooling effect. Attached Figure Description

[0026] Figure 1 This is a top view of the structure of this utility model;

[0027] Figure 2 This is a side view of the present invention.

[0028] Figure 3 This is a schematic diagram of the surface reinforcement layer of the slide rail of this utility model;

[0029] In the diagram: 1. Base; 2. Slide rail; 3. Surface strengthening layer; 4. Stress dispersion groove; 5. Cooling channel; 6. Reinforcing rib; 7. Baffle plate; 8. Transition layer; 9. Wear-resistant layer; 10. Corrosion-resistant layer. Detailed Implementation

[0030] 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 protection scope of the present utility model.

[0031] Please see Figure 1-3 The present invention provides a metal guide rail with a surface-strengthened structure, comprising a guide rail body, wherein the guide rail body comprises;

[0032] Base 1: The top has a mounting slot;

[0033] Slide rail 2: vertically fixed in the mounting groove of the base 1;

[0034] Surface strengthening layer 3: Covers the outer surface of slide rail 2. The surface strengthening layer 3 includes a transition layer 8, a wear-resistant layer 9, and an anti-corrosion layer 10. The transition layer 8 is located between the wear-resistant layer 9 and the outer surface of slide rail 2, and the anti-corrosion layer 10 covers the wear-resistant layer 9.

[0035] Working principle

[0036] Guide rail main structure

[0037] composition:

[0038] Base 1: The top is machined with a mounting groove for fixing the slide rail 2. The material is ductile iron or low alloy steel.

[0039] Slide rail 2: Vertically embedded in the mounting groove of base 1, cylindrical or long tubular in shape (preferably with an outer diameter of 20-100mm), and made of hardened alloy steel (such as 42CrMo).

[0040] Surface strengthening layer 3: From the inside out, it consists of transition layer 8, wear-resistant layer 9, and corrosion-resistant layer 10;

[0041] Cooling channel 5: runs through the slide rail 2 axially, with a channel diameter of 3-10mm, and is equipped with reinforcing ribs 6 and baffles 7 inside.

[0042] Working principle:

[0043] Stress dispersion: The stress dispersion grooves 4 axially distributed on the top of the slide rail 2 change the geometry of the contact surface, transforming concentrated stress into distributed stress and reducing the risk of fatigue cracks.

[0044] Synergistic effect of composite reinforcement layers:

[0045] The transition layer 8 is formed by high-speed oxygen fuel spraying (HVOF) to create a dense metallurgical bonding layer, thereby improving the bonding strength between the coating and the substrate;

[0046] Wear-resistant layer 9 uses plasma-sprayed tungsten carbide particles to provide high hardness and resist sliding wear;

[0047] The anti-corrosion layer 10 is formed into a continuous thin film using physical vapor deposition (PVD) coating, which reduces the coefficient of friction and isolates corrosive media;

[0048] Cooling and structural reinforcement:

[0049] The cooling medium (such as a water-based solution or compressed air) circulates in the cooling channel 5, and the frictional heat is dissipated through thermal convection.

[0050] Cross-shaped reinforcing ribs 6 and turbulence-disrupting fins 7: enhance the compressive strength of the inner wall of the sliding tube and guide fluid turbulence to improve heat exchange efficiency.

[0051] Detailed Explanation of Preferred Technical Solutions

[0052] Stress Dispersion Tank Design

[0053] Structural parameters: groove depth 1-3mm, groove width 2-5mm, cross-section is circular arc or trapezoidal;

[0054] Function: By redistributing stress at the edge of the tank, the peak stress at the contact surface is reduced (by 25-40%).

[0055] Gradient composite coating

[0056] The transition layer 8 is composed of a nickel-based alloy (NiCrAlY) formed by high-speed oxygen fuel spraying (HVOF) process, with a preferred coating thickness of 0.05-0.15 mm.

[0057] The wear-resistant layer features a 9-gradient design: the surface layer has a WC content of ≥85wt%, and the near-transition layer has a WC content of 60-75wt%, avoiding interface peeling caused by sudden changes in hardness.

[0058] Cooling channel 5 optimization

[0059] The arrangement of the turbulence vanes 7: arranged along the axis of the reinforcing ribs 6 with a spacing of 5-10mm, improves the convective heat transfer efficiency, reduces the formation of large-scale eddies, and reduces flow instability and energy loss;

[0060] Material compatibility: The reinforcing rib 6 and the slide rail 2 are made of the same material and are integrally formed by laser cladding.

[0061] Detailed patent workflow

[0062] Step 1: Machining of the guide rail base

[0063] Base 1 casting: After melting and casting ductile iron, the base 1 is machined and the mounting groove is then machined.

[0064] Slide rail 2 forming:

[0065] Alloy steel bars are heat-treated (quenching + tempering, hardness HRC45-50).

[0066] The outer diameter and stress dispersion groove 4 are machined by CNC turning;

[0067] Axial cooling channels are formed by laser drilling or deep hole drilling.

[0068] Step 2: Preparation of Surface Strengthening Layer 3

[0069] Matrix pretreatment:

[0070] The surface of slide rail 2 is treated with sandblasting;

[0071] Acetone ultrasonic cleaning was used to remove oil stains.

[0072] Coating spraying:

[0073] Transition layer 8: Formed using a nickel-based alloy (NiCrAlY) via high-speed oxygen fuel spraying (HVOF) process, with a preferred coating thickness of 0.05-0.15 mm;

[0074] Wear-resistant layer 9: formed by plasma spraying of tungsten carbide (WC) composite cobalt (Co) powder, preferably with WC particle size of 10-50μm, preferably with Co content of 5-12wt%, and preferably with coating thickness of 0.2-0.4mm;

[0075] Anti-corrosion layer 10: Physical vapor deposition (PVD) preferably uses titanium nitride (TiN), with a preferred thickness of 2-5 μm.

[0076] Step 3: Cooling System Integration

[0077] Processing of reinforcing rib 6:

[0078] Laser selective melting is used to form cross-shaped reinforcing ribs 6 within the cooling channel 5;

[0079] 7. Electrical discharge machining of turbulence plate.

[0080] Sealing test: Introduce 0.5MPa compressed air, maintain pressure for 10 minutes, and test for leakage rate (≤0.1%).

[0081] Step 4: Functional Verification

[0082] Wear resistance test: reciprocating friction test (load 500N, speed 0.2m / s), wear amount ≤0.01mm / 10,000 cycles;

[0083] Heat dissipation efficiency test: When 40℃ cooling water (flow rate 5L / min) is introduced, the temperature rise of the guide rail surface is ≤15℃.

[0084] Innovation points and technological advantages

[0085] Multifunctional integration:

[0086] Through the collaborative design of "stress dispersion groove 4 + gradient coating + internal cooling channel", the three major problems of stress concentration, wear and thermal deformation are solved at the same time.

[0087] Process compatibility:

[0088] The surface strengthening layer 3 and the cooling system can be processed independently, making them suitable for custom guide rails of different specifications.

[0089] Long life design:

[0090] Theoretical service life ≥ 100,000 hours (3-5 times better than traditional guide rails).

[0091] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A metal guide rail with a surface-strengthened structure, characterized in that, Includes a guide rail body, the guide rail body comprising; Base (1): The top is provided with a mounting slot; Slide rail (2): vertically fixed in the mounting groove of the base (1); Surface strengthening layer (3): Covers the outer surface of the slide rail (2). The surface strengthening layer (3) includes a transition layer (8), a wear-resistant layer (9), and an anti-corrosion layer (10). The transition layer (8) is located between the wear-resistant layer (9) and the outer surface of the slide rail (2). The anti-corrosion layer (10) covers the wear-resistant layer (9).

2. A metal guide rail with a surface-strengthened structure according to claim 1, characterized in that, The slide rail (2) is a cylindrical or long tubular structure.

3. A metal guide rail with a surface-strengthened structure according to claim 2, characterized in that, The top of the slide rail (2) is provided with a stress dispersion groove (4) along the axial direction.

4. A metal guide rail with a surface-strengthened structure according to claim 3, characterized in that, The transition layer (8) is coated with a nickel-based alloy, the wear-resistant layer (9) is coated with tungsten carbide particles, and the corrosion-resistant layer (10) is coated with PVD.

5. A metal guide rail with a surface-strengthened structure according to claim 4, characterized in that, The slide rail (2) has a cooling channel (5) arranged axially inside.

6. A metal guide rail with a surface-strengthened structure according to claim 5, characterized in that, The cooling channel (5) is provided with several reinforcing ribs (6).

7. A metal guide rail with a surface-strengthened structure according to claim 6, characterized in that, The reinforcing rib (6) has a cross-shaped structure, and several baffles (7) are provided on the reinforcing rib (6).

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