Self-lubricating auxiliary support device

Abstract

The utility model relates to milling machine parts technical field, proposes a kind of self-lubricating auxiliary supporting device, including support block main body and embedded body, wherein, support block main body is provided with lubricating surface, a plurality of embedded holes are provided on the lubricating surface, embedded body is set in the embedded hole, the end surface of embedded body is lower than the port surface of embedded hole, embedded body is graphite column, and support block main body is brass block. Through the above technical scheme, the problem that the support block of single material in the prior art is difficult to meet production needs due to poor lubrication and heat dissipation is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of milling machine parts, specifically to a self-lubricating auxiliary support device. Background Technology

[0002] Roll ring milling machines are widely used in high-precision roll ring processing in industries such as metallurgy, papermaking, and plastics. Their core function is to machine threaded ribs or other geometric structures onto the surface of the roll ring through milling. The support block, serving as the positioning and load-bearing component for the milling cutter, directly affects machining accuracy, surface quality, and production efficiency.

[0003] In existing technologies, end mill support blocks are generally made of pure brass or steel. Pure brass support blocks suffer from insufficient lubrication, low heat dissipation efficiency, and short lifespan. Furthermore, the coefficient of friction between brass and the cutting tool is as high as 0.3-0.5 (ASTM). The G99 standard test results in a tool flank wear rate of 0.15 mm / h and a surface roughness Ra≥1.6 μm, failing to meet the high-precision roller ring requirement of Ra≤0.8 μm. Brass has a thermal conductivity of 109 W / (m•K), and at high-speed cutting (linear speed >150 m / min), the cutting zone temperature can reach 180℃, causing workpiece thermal deformation (typical dimensional deviation ±0.05 mm). The support block's working surface is prone to plastic deformation under high temperature and pressure, resulting in a service life of only 200 hours (actual data), requiring frequent machine downtime for support block replacement. Steel support blocks have poor self-lubrication, mismatched thermal expansion coefficients, and a higher coefficient of friction (0.5-0.6), requiring an external lubrication system. However, the lubricating oil easily contaminates the machined surface, affecting the roller ring coating adhesion. The difference in thermal expansion coefficients between steel and brass leads to uneven contact stress during temperature changes, accelerating tool chipping. In summary, the existing support blocks, made of a single material, cannot simultaneously meet the requirements of high strength, lubrication, and heat dissipation, and are prone to wear, resulting in a short service life and high maintenance costs. Utility Model Content

[0004] This invention proposes a self-lubricating auxiliary support device, which solves the problem that the support blocks made of a single material in the prior art are difficult to meet production needs due to poor lubrication and heat dissipation.

[0005] The technical solution of this utility model is as follows:

[0006] A self-lubricating auxiliary support device includes a support block body and an insert. The support block body has a lubrication surface and a plurality of insertion holes. The insert is disposed in the insertion holes, and the end face of the insert is lower than the port surface of the insertion hole. The insert is a graphite column, and the support block body is a brass block.

[0007] The distance between the end face of the insert and the end face of the insert hole is between 0.13 mm and 0.17 mm.

[0008] The lubrication surface is a semi-cylindrical surface, and the array of embedded holes is disposed on the lubrication surface, with three adjacent embedded holes forming a triangular arrangement.

[0009] The support block body has snap-fit ​​grooves on both the upper and lower end faces.

[0010] The snap-fit ​​groove is a trapezoidal groove.

[0011] The support block body is provided with a clearance notch, which is located in the middle of the lubrication surface, and a plurality of the embedding holes are respectively located on the lubrication surface on both sides of the clearance notch.

[0012] The main body of the support block has a fan-shaped structure.

[0013] The working principle and beneficial effects of this utility model are as follows:

[0014] This utility model discloses a self-lubricating auxiliary support device, which adopts a composite material support block. The main body of the support block is made of brass, and the embedded parts are graphite columns. Through the synergistic effect of graphite and brass, the support performance for the milling cutter is improved. Specifically, one side of the main body of the support block is a lubricating surface that contacts and abuts against the milling cutter. Multiple embedding holes are formed on the lubricating surface, into which the embedded parts are inserted. When the milling cutter rotates, the graphite columns lubricate the cutter, forming a lubrication protection, improving lubrication while reducing wear, extending service life, and reducing maintenance costs and cycles. The graphite columns can also serve as a heat conduction path, improving heat dissipation. This innovative composite support structure solves the problem in existing technologies where single-material support is insufficient for production needs due to poor lubrication and heat dissipation. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the present invention in use;

[0018] In the figure: 1. Support block body, 2. Embedded body, 3. Lubricating surface, 4. Embedded hole, 5. Snap-fit ​​groove, 6. Clearance notch, 7. Rotating column, 8. Cutting head, 9. Workpiece, 10. Clamping jaw. Detailed Implementation

[0019] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0020] like Figures 1-2 As shown in the figure, this embodiment proposes a self-lubricating auxiliary support device. The support device includes a support block body 1 and an insert 2. The support block body 1 is provided with a lubrication surface 3 and a plurality of insertion holes 4 are provided on the lubrication surface 3. The insert 2 is disposed in the insertion holes 4. The end face of the insert 2 is lower than the port surface of the insertion hole 4. The insert 2 is a graphite column and the support block body 1 is a brass block.

[0021] In this embodiment, a schematic diagram showing the installation and use of the self-lubricating auxiliary support device in conjunction with the milling cutter is shown. Figure 2 The support device is described below for illustrative purposes. The main component is the support block body 1, which has a lubrication surface 3 for contacting the milling cutter and providing support and lubrication. The milling cutter is an assembly with a cutter head 8 located in the middle of the rotating column 7. A workpiece 9 is positioned on one side of the milling cutter. The workpiece 9 rotates under the clamping of the milling machine chuck, contacting the cutter head 8 to perform milling.

[0022] The rotating column 7 abuts against the lubrication surface 3 of the support block body 1. Multiple embedding holes 4 are provided on the lubrication surface 3. An embedding body 2 is set in the embedding hole 4. The embedding body 2 is made of graphite column. The embedding body 2 and the support block body 1 form a support device with a composite material structure. When the rotating column 7 rotates, the graphite column can provide lubrication and also provide a heat conduction path to assist heat dissipation. After the lubrication effect is improved, the wear of the support block body 1 is reduced, the service life is extended, and the use cost is reduced, thereby meeting the production needs.

[0023] The distance between the end face of the insert 2 and the end face of the insert hole 4 is between 0.13 mm and 0.17 mm.

[0024] Based on the above embodiments, the installation structure between the insert 2 and the insert hole 4 is further optimized. The distance between the end face of the insert 2 and the end face of the inlet of the insert hole 4 is between 0.13mm and 0.17mm, thereby forming a continuous micro-concave lubrication groove for storing lubricating medium and lubricating graphite particles. It mixes with the cutting fluid to form a self-healing lubricating film, prolonging the lubrication time and improving the lubrication effect.

[0025] The lubrication surface 3 is a semi-cylindrical surface, and the embedding holes 4 are arrayed on the lubrication surface 3, with three adjacent embedding holes 4 forming a triangular arrangement.

[0026] Based on the above embodiment, the lubrication surface 3 on the support block body 1 is a semi-cylindrical surface so as to abut against the semi-cylindrical surface. Multiple embedding holes 4 are also provided in the semi-cylindrical surface. The embedding holes 4 are arranged in an array. The three adjacent embedding holes 4 on the lubrication surface 3 are arranged in a triangle. Referring to the attached figure, the triangular arrangement of the embedding holes 4 can maximize the contact area, and the wear of the graphite column will be relatively uniform.

[0027] To further improve heat dissipation, based on the above embodiments, after the insert 2 is installed on the support block body 1, its surface is polished and coated with a molybdenum disulfide coating, which can accelerate radiative heat dissipation and further improve the heat dissipation effect.

[0028] The upper and lower end faces of the support block body 1 are provided with snap-fit ​​grooves 5.

[0029] The snap-fit ​​groove 5 is a trapezoidal groove.

[0030] In this embodiment, the structure of the support block body 1 is further optimized. A snap-fit ​​groove 5 is provided on both the upper and lower end faces of the support block body 1 to facilitate fixing the support block body 1. The upper and lower claws 10 are engaged into the snap-fit ​​groove 5 to fix the support block body 1 in place. In possible implementations, the snap-fit ​​groove 5 can be a trapezoidal groove for a more secure snap-fit, or it can be a V-shaped groove.

[0031] The support block body 1 is provided with a clearance notch 6, which is located in the middle of the lubrication surface 3, and a plurality of the embedding holes 4 are respectively located on the lubrication surface 3 on both sides of the clearance notch 6.

[0032] Based on the above embodiments, a cutter head 8 is provided in the middle region of the rotating column 7. The rotating column 7 drives the cutter head 8 to rotate. In one possible embodiment, the support block body 1 is provided with a clearance notch 6 to allow rotation space for the rotating cutter head 8. The clearance notch 6 divides the lubrication surface 3 into upper and lower parts. Both the upper and lower parts of the lubrication surface 3 are provided with embedding holes 4 for installing graphite columns and providing support for the rotating column 7.

[0033] The main body 1 of the support block has a fan-shaped structure.

[0034] In this embodiment, the main body 1 of the support block adopts a fan-shaped structure to reduce the use of materials.

[0035] Based on the above embodiments, a performance comparison was conducted between the brass support device and the support device of this utility model. The experimental data are as follows:

[0036] Test conditions:

[0037] Equipment: XK7150 CNC milling machine (spindle power 22kW, maximum speed 6000r / min).

[0038] Cutting tool: φ8mm carbide end mill.

[0039] Workpiece: Carbide steel roller ring (hardness HRC 42-52, outer diameter φ300mm).

[0040] Cutting parameters: v=150m / min, f=0.1mm / r, ap=2mm, dry cutting.

[0041] The performance comparison table is as follows:

[0042] index Traditional brass support block support block of the present invention Increase ratio Tool back face wear 0.15mm / h 0.05mm / h 66.7% Surface roughness Ra 1.6μm 0.8μm 50% Support block lifespan 200 hours 600 hours 200% Cutting temperature 180℃ 110℃ 38.9% Machining accuracy (roundness) 0.05mm 0.02mm 60%

[0043] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A self-lubricating auxiliary support device, characterized in that, The support device includes a support block body (1) and an insert (2). The support block body (1) is provided with a lubrication surface (3) and a plurality of insert holes (4) are provided on the lubrication surface (3). The insert (2) is disposed in the insert hole (4). The end face of the insert (2) is lower than the port surface of the insert hole (4). The insert (2) is a graphite column and the support block body (1) is a brass block.

2. The self-lubricating auxiliary support device according to claim 1, characterized in that, The distance between the end face of the insert (2) and the end face of the insert hole (4) is between 0.13 mm and 0.17 mm.

3. The self-lubricating auxiliary support device according to claim 1, characterized in that, The lubrication surface (3) is a semi-cylindrical surface, and the embedding holes (4) are arrayed on the lubrication surface (3) with three adjacent embedding holes (4) forming a triangular arrangement.

4. The self-lubricating auxiliary support device according to claim 1, characterized in that, The support block body (1) is provided with snap-fit ​​grooves (5) on both the upper and lower end faces.

5. The self-lubricating auxiliary support device according to claim 4, characterized in that, The snap-fit ​​groove (5) is a trapezoidal groove.

6. The self-lubricating auxiliary support device according to claim 1, characterized in that, The support block body (1) is provided with a clearance notch (6), the clearance notch (6) is located in the middle of the lubrication surface (3), and a plurality of the embedding holes (4) are respectively located on the lubrication surface (3) on both sides of the clearance notch (6).

7. The self-lubricating auxiliary support device according to claim 1, characterized in that, The main body (1) of the support block is a fan-shaped structure.

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