Double-layer milling cutter for simultaneously machining front and back surfaces of thin-walled workpiece

Abstract

The utility model discloses a double-layer milling cutter for simultaneously processing the front and back surfaces of a thin-walled workpiece, which comprises a cutter handle, two disc-type milling cutters distributed at intervals are arranged on the cutter handle, each disc-type milling cutter is provided with a plurality of blades, and the two disc-type milling cutters are symmetrically distributed relative to the two sides of the workpiece. The blades on one disc type milling cutter are oppositely arranged in the radial direction relative to the corresponding blades on the other disc type milling cutter, so that opposite clamping and milling of a workpiece are realized; the device has the advantages that the front side and the back side of a workpiece are machined at the same time, machining efficiency can be improved, workpiece deformation or size inconsistency cannot be caused, the problems of vibration (cutter vibration) and overlong machining takt are not prone to being generated in the machining process, machining precision can be improved, and it is guaranteed that the surface roughness of a product is qualified.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, and in particular to a double-layer milling tool for simultaneously machining the front and back sides of thin-walled parts. Background Technology

[0002] In the automotive manufacturing industry, machining thin-walled structural components such as die-cast aluminum subframes presents a significant technical challenge. This machining typically employs a combination of milling cutters and T-cutting tools. Traditional machining techniques often require machining both the front and back of the workpiece separately. This is not only time-consuming and inefficient, but also prone to deformation or dimensional inconsistencies during the machining process, affecting the final product's assembly and performance. Furthermore, traditional machining techniques are prone to product quality issues. Specifically, due to the structural characteristics of thin-walled components, vibration (vibrating cutter) and excessively long machining cycles are common during machining. These problems can lead to decreased machining accuracy, substandard surface roughness, and even tool damage or workpiece scrap. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a double-layer milling cutter for simultaneously machining the front and back sides of thin-walled parts. It can improve machining efficiency by simultaneously machining the front and back sides of the workpiece, without causing workpiece deformation or inconsistent dimensions, and is less likely to cause vibration (vibrating cutter) and excessively long machining cycle during machining. It can improve machining accuracy and ensure that the surface roughness of the product is qualified.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a double-layer milling tool for simultaneous machining of the front and back sides of thin-walled parts, including a tool holder, characterized in that: two spaced-apart disc milling cutters are provided on the tool holder, each disc milling cutter has several cutting inserts, the two disc milling cutters are symmetrically distributed with respect to the two sides of the workpiece, and the cutting insert on one disc milling cutter is radially opposite to the corresponding cutting insert on the other disc milling cutter, so as to realize the opposing clamping and milling of the workpiece.

[0005] The disc milling cutter includes a cutter head and several inserts. The cutter head is mounted on the tool holder, ensuring that the axis of the cutter head is aligned with the axis of the tool holder. Multiple teeth are evenly arranged circumferentially on the sidewall of the cutter head, and one insert is mounted on each tooth. Because the axis of the cutter head is aligned with the axis of the tool holder, the stability of the tool during machining is ensured, vibration is reduced, and machining accuracy is improved. The evenly arranged teeth and inserts on the sidewall of the cutter head ensure uniform distribution of cutting force, avoid localized overload, and improve cutting efficiency and tool life.

[0006] The insert is a polycrystalline diamond insert, and its milling section is designed with a trapezoidal, arc-shaped tooth structure to achieve layered milling of the workpiece. Due to its high hardness and wear resistance, polycrystalline diamond inserts can improve tool life and cutting efficiency, reducing tool change frequency. The trapezoidal tooth structure of the insert allows for layered milling, machining only a small portion of the workpiece at a time, effectively reducing the depth of cut per pass. This layered milling technique, by reducing the depth of cut per pass, correspondingly reduces the axial cutting force, which is particularly important for machining thin-walled parts with low strength, as they cannot withstand excessive cutting forces, thus avoiding workpiece deformation or damage due to insufficient strength. By distributing the total cutting amount throughout the machining process across multiple layers, the cutting amount in each layer is reduced. This not only mitigates the impact of a single cut on the workpiece but also reduces stress and deformation during machining, ensuring the dimensional accuracy and shape integrity of the workpiece. Simultaneously, the reduced cutting force and stress also reduce vibration of the workpiece and tool, further improving machining accuracy. The smaller cutting force and layered milling also help reduce tool wear and extend tool life. The trapezoidal tooth design can adapt to cutting requirements of different shapes and sizes, increasing the flexibility and adaptability of the cutting tool.

[0007] The cutter head has eight teeth evenly arranged along the circumference on its side wall, with an included angle of 45 degrees between two adjacent teeth, and each blade is welded to one of the teeth.

[0008] The connection structure between the two disc milling cutters and the tool holder allows the spacing between the two disc milling cutters to be adjustable to accommodate milling workpieces of different thicknesses.

[0009] The connecting part of the tool holder is designed to be compatible with different machining equipment to meet the needs of machining thin-walled parts in various occasions.

[0010] Compared with the prior art, the advantages of this utility model are:

[0011] 1) Because there are two disc milling cutters, and the two disc milling cutters are symmetrically distributed with respect to the two sides of the workpiece, the front and back of the workpiece can be milled simultaneously, completing the workpiece milling process in one go, which significantly reduces the processing time and improves the processing efficiency; and because the two disc milling cutters clamp the workpiece in opposite directions, the stability of the workpiece during the processing can be better controlled, avoiding the problems of deformation caused by improper clamping and inconsistent dimensions caused by separate processing of the front and back sides.

[0012] 2) The two disc milling cutters clamp the workpiece in opposite directions, which helps to stabilize the disc milling cutters, reduce vibration during the machining process, improve the stability of the machining process, and ensure machining accuracy.

[0013] 3) The stability of disc milling cutters can improve the roughness of the machined surface and achieve better surface quality.

[0014] 4) The two spaced disc milling cutters on the tool holder can be adjusted according to the specific size and shape of the workpiece, which improves the adaptability and flexibility of the tool.

[0015] 5) Since opposing clamping reduces the load on a single-sided tool, it can extend the tool's service life and reduce wear. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the double-layer milling cutter of this utility model. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the overall structure of the double-layer milling cutter of this utility model. Figure 2 ;

[0018] Figure 3 This is an exploded structural diagram of the double-layer milling tool of this utility model;

[0019] Figure 4 This is a front view of the disc milling cutter in the double-layer milling tool of this utility model;

[0020] Figure 5 This is a schematic diagram of the insert in the disc milling cutter of the double-layer milling tool of this utility model;

[0021] Figure 6 for Figure 2 An enlarged schematic diagram of part A in the middle. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] This utility model proposes a double-layer milling cutter for simultaneous machining of the front and back sides of thin-walled parts. It is suitable for machining thin-walled parts such as automotive die-cast aluminum subframes. As shown in the figure, it includes a tool holder 1, on which two spaced-apart disc milling cutters 2 are arranged. Each disc milling cutter 2 has several inserts 21. The two disc milling cutters 2 are symmetrically distributed on both sides of the workpiece (such as a high-pressure die-cast part). The inserts 21 on one disc milling cutter 2 are radially opposite to the corresponding inserts 21 on the other disc milling cutter 2 to achieve opposing clamping and milling of the workpiece.

[0024] Further defining the milling cutter 2, it includes a cutter head 22 and several inserts 21. The cutter head 22 is mounted on the tool holder 1, ensuring that the axis of the cutter head 22 is aligned with the axis of the tool holder 1. Multiple teeth 221 are evenly arranged circumferentially on the sidewall of the cutter head 22, and one insert 21 is mounted on each tooth 221. Because the axis of the cutter head 22 is aligned with the axis of the tool holder 1, the stability of the tool during machining is ensured, vibration is reduced, and machining accuracy is improved. The evenly arranged teeth 221 and inserts 21 on the sidewall of the cutter head 22 ensure uniform distribution of cutting force, avoid local overload, and improve cutting efficiency and tool life.

[0025] As a preferred embodiment, the insert 21 is a polycrystalline diamond insert. The milling portion 211 of the insert 21 is designed with a trapezoidal arc-shaped tooth structure to achieve layered milling of the workpiece. One side of the insert 21 has an overall arc-shaped structure, with a portion being the milling portion 211 and the remaining portion being the non-milling portion 212. When installing the insert 21, the milling portion 211 is radially inward, and the non-milling portion 212 is radially outward. The pitch of the arc-shaped tooth gradually increases radially from the outside to the inside. Due to its high hardness and wear resistance, the polycrystalline diamond insert 21 can improve tool life and cutting efficiency, and reduce the number of tool changes. The trapezoidal tooth structure design of the insert 21 enables the tool to perform layered milling, machining only a small area of ​​the workpiece at a time, effectively reducing the depth of cut per pass. This layered milling technology reduces the axial cutting force by reducing the depth of cut per pass, which is particularly important for machining thin-walled parts with low strength, as they cannot withstand excessive cutting forces, thus avoiding workpiece deformation or damage due to insufficient strength. By distributing the total cutting amount throughout the machining process across multiple layers, the cutting amount at each layer is reduced. This not only mitigates the impact of a single cut on the workpiece but also lowers stress and deformation during machining, ensuring the dimensional accuracy and shape integrity of the workpiece. Simultaneously, the reduced cutting forces and stress also decrease vibrations in both the workpiece and the tool, further improving machining accuracy. Smaller cutting forces and layered milling also help reduce tool wear and extend tool life. The trapezoidal tooth design can adapt to cutting requirements of different shapes and sizes, increasing the flexibility and adaptability of the tool.

[0026] As a preferred embodiment, eight teeth 221 are evenly arranged along the circumferential direction on the side wall of the cutter head 22, with the included angle between two adjacent teeth 221 being 45 degrees, and each blade 21 is welded to one tooth 221.

[0027] As a preferred embodiment, the connection structure between the two disc milling cutters 2 and the tool holder 1 allows the spacing between the two disc milling cutters 2 to be adjusted to accommodate milling of workpieces of different thicknesses, such as adjusting the spacing to 4 mm; the connection part of the tool holder 1 is designed to be compatible with different machining equipment to meet the needs of machining thin-walled parts in multiple occasions.

[0028] The tool holder 1 of the double-layer milling cutter is installed on the machining equipment, and the distance between the two disc milling cutters 2 is aligned with the machining part of the workpiece to be machined. The tool holder 1 is driven to rotate, thereby causing the cutting insert 21 to rotate at high speed to mill the machining part of the workpiece to be machined.

Claims

1. A double-layer milling tool for simultaneously machining the front and back sides of thin-walled parts, comprising a tool holder, characterized in that: The tool holder is provided with two spaced disc milling cutters, each disc milling cutter having several inserts. The two disc milling cutters are symmetrically distributed on both sides of the workpiece. The inserts on one disc milling cutter are radially opposite to the corresponding inserts on the other disc milling cutter, so as to realize the opposing clamping and milling of the workpiece.

2. A double-layer milling tool for simultaneously machining the front and back sides of a thin-walled part according to claim 1, characterized in that: The disc milling cutter includes a cutter head and several cutting inserts. The cutter head is mounted on the tool holder, and the axis of the cutter head is aligned with the axis of the tool holder. Multiple teeth are evenly arranged along the circumferential direction on the side wall of the cutter head, and one cutting insert is mounted on each tooth.

3. A double-layer milling tool for simultaneously machining the front and back sides of a thin-walled part according to claim 1 or 2, characterized in that: The cutting tool is a polycrystalline diamond cutting tool, and the milling part of the cutting tool is designed with a trapezoidal arc-shaped tooth section to achieve layered milling of the workpiece.

4. A double-layer milling tool for simultaneously machining the front and back sides of a thin-walled part according to claim 2, characterized in that: The cutter head has eight teeth evenly arranged along the circumference on its side wall, with an included angle of 45 degrees between two adjacent teeth, and each blade is welded to one of the teeth.

5. A double-layer milling tool for simultaneously machining the front and back sides of a thin-walled part according to claim 1, characterized in that: The connection structure between the two disc milling cutters and the tool holder allows the spacing between the two disc milling cutters to be adjustable.

6. A double-layer milling tool for simultaneously machining the front and back sides of a thin-walled part according to claim 1, characterized in that: The connecting part of the tool holder is designed to be compatible with different machining equipment.

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