Rapid milling device for workpiece edges

Abstract

The utility model discloses a quick milling device for workpiece edges, which belongs to the technical field of machining and comprises a cutter head mounted below a main shaft of a milling machine and an arc milling cutter mounted on the cutter head, the arc milling cutter comprises a cutter body fixed on the cutter head and a cutter head, and an obtuse angle is formed between the cutter head and the cutter body. And the top of the tool bit is a concave arc-shaped cutting edge. The arc milling cutter is clamped on a common vertical milling machine through the cutter head, the function of a forming R cutter can be effectively replaced through the linear reciprocating motion of a combined workpiece, and on the premise that the machining efficiency is not sacrificed and the machining consistency is guaranteed, rapid milling machining of an edge inverted arc can be achieved, and the machining efficiency is improved. The machining flexibility is greatly improved, and the machining cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of machining technology, specifically relating to a rapid milling processing device for workpiece edges. Background Technology

[0002] Sharp edges are inevitably produced during machining processes. These edges not only make assembly difficult and increase the risk of accidental injury, but also tend to cause stress concentration, reducing product durability and lifespan. Therefore, to reduce safety hazards during product use, minimize stress concentration, and extend product lifespan, quickly implementing edge rounding technology is crucial to solving this problem.

[0003] Currently, there are three main methods for rounding edges: manual work, forming R-cutting tool, and machining center processing.

[0004] Fitter machining first involves scribing, then manually machining the edges to achieve rounded edges using tools; forming R-cutters on milling machines or machining centers achieve rounded edges through tool feed; machining on machining centers first involves programming based on the tool being used, and the tool achieves rounded edges by following the machining path.

[0005] For rounding straight edges with relatively relaxed process requirements, aimed at facilitating assembly, reducing accidental injuries, and minimizing stress concentration, manual machining is time-consuming and labor-intensive, resulting in poor consistency and accuracy. Batch processing leads to low efficiency and high costs. While forming R-cutting offers high precision and efficiency, the tools themselves are expensive, and after tool wear, it is difficult to ensure consistent sharpening of all cutting edges. Therefore, it is not economical for rounding edges with relaxed process requirements. Machining center programming is cumbersome, requiring reprogramming whenever dimensions change. Additionally, the operating cost of machining centers is high, making machining center processing less economical.

[0006] Therefore, there is an urgent need for a rapid milling device for workpiece edges that can be used on ordinary vertical milling machines. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a machining method for rapidly milling the edges and arcs of a part by using a combination of arc milling cutters on a conventional vertical milling machine.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0009] A rapid milling device for workpiece edges includes a cutter head mounted below the milling machine spindle and a circular arc milling cutter mounted on the cutter head. The circular arc milling cutter includes a cutter body for fixing on the cutter head and a cutter head set at an obtuse angle to the cutter body. The top of the cutter head is a concave circular arc cutting edge.

[0010] A further improvement of this utility model is that: the arc surface of the cutting edge is provided with a clearance angle of 10-12°, and an edge of no more than 30° is provided between the cutting edge and the rake face.

[0011] A further improvement of this utility model is that: the cutter head has a through hole in the middle and a mounting port on the side, and the arc end mill is fixed in the cutter head mounting port by clamping bolts.

[0012] A further improvement of this utility model is that the included angle between the blade body and the blade tip is 135°.

[0013] A further improvement of this utility model is that the curvature of the cutting edge is adapted to the radius requirement of the edge arc of the workpiece to be processed.

[0014] The technological advancements achieved by this utility model due to the adoption of the above technical solution are as follows:

[0015] This application addresses the machining of rounded edges with relatively relaxed process requirements, aimed at reducing safety hazards and stress concentration. It eliminates the need to purchase expensive forming rounded cutters or use machining centers. Based on the required edge radius R, a common lathe tool can be self-ground to produce a rounded end mill that meets production requirements, significantly improving machining flexibility. By clamping the cutter head onto a conventional vertical milling machine, the function of a forming rounded cutter can be effectively replaced. Combined with the linear reciprocating motion of the workpiece, rapid milling of rounded edges can be achieved without sacrificing machining efficiency and consistency, greatly improving machining flexibility and reducing machining costs.

[0016] Compared with fitter's machining, the processing tool of this application has higher processing efficiency and consistency; compared with forming R-cut machining, the processing of this application's device can achieve lower processing costs without sacrificing processing efficiency; compared with machining center machining, the processing of this application's device does not require programming, and only requires trial cutting to adjust the relative position of the tool and the workpiece, making operation simpler and processing costs lower. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the edge-milling rapid machining device of this utility model;

[0018] Figure 2 yes Figure 1 Top view;

[0019] Figure 3 This is a schematic diagram of a circular arc milling cutter;

[0020] Figure 4 This is a sectional view of a circular arc milling cutter;

[0021] Among them, 1. part to be processed, 2. arc end mill, 2-1. cutter body, 2-2. cutter head, 3. clamping bolt, 4. cutter disc. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to embodiments:

[0023] like Figure 1 , 2 As shown, a rapid milling device for workpiece edges includes a cutter head 4 mounted below the milling machine spindle and a circular arc end mill 2 mounted on the cutter head. The circular arc end mill 2 includes a cutter body 2-1 fixed on the cutter head 4 and a cutter head 2-2 set at an obtuse angle to the cutter shank. The top of the cutter head 2-2 is a concave circular arc-shaped cutting edge. The circular arc surface of the cutting edge is provided with a clearance angle of 10-12° to prevent interference between the clearance face and the workpiece during cutting, thus preventing tool collision. An edge of no more than 30° is provided between the cutting edge and the rake face to enhance the strength of the cutting edge, improve the tool's durability, and effectively reduce the problem of tool cutting edge damage during cutting.

[0024] The cutter head 4 has a mounting port on its side, and the arc end mill 2 is fixed in the mounting port of the cutter head 4 by clamping bolts 3. The cutter head 4 can be configured as a disc with a through hole in the middle and a mounting port on one side. The mounting port has bolt holes. The cutter body 2-1 of the arc end mill 2 is vertically installed in the mounting port and fixed by clamping bolts 3. The cutter head 2-2 faces downward. Since the cutter head and the cutter shank are at a certain angle, the cutting edge at the top of the cutter head faces outward.

[0025] like Figure 3 , 4 As shown, in a preferred embodiment, the included angle between the cutter body 2-1 and the cutter head 2-2 is 135°, the cutting edge is at 45° to the horizontal plane, and the curvature of the cutting edge is adapted to the radius requirement of the edge arc of the workpiece 1 to be processed, that is, it matches the curvature of the rounded corner required by the edge of the workpiece to be processed.

[0026] The cutting edge has a 10° clearance angle ground on its arc surface, and a 30° edge is ground between the cutting edge and the rake face.

[0027] How to use:

[0028] First, based on the radius requirements of the edge arc of the part to be machined, grind a circular arc end mill 2 with a suitable arc, such as... Figure 3 , 4 The circular arc end mill 2 shown is a milling cutter that is self-ground from a 45° right lathe tool. The cutting part of the cutter head is ground into a concave circular arc cutting edge. Then, according to the material of the workpiece and the cutting amount, the appropriate spindle speed and table feed speed are set. Through the rotational motion of the compound circular arc end mill and the linear reciprocating motion of the workpiece, the rapid milling of the rounded edges is finally achieved.

[0029] The cutter head 4 is connected to the machine tool spindle via a face milling cutter shank on the milling machine, meaning the cutter head 4 rotates with the machine tool spindle; the arc milling cutter 2 is fixed to the mounting port of the cutter head 4 via clamping bolts 3, and rotates with the cutter head 4 under the drive of the machine tool spindle; the workpiece 1 to be processed is fixed on the milling machine worktable by a fixture, thereby realizing the linear reciprocating motion of the workpiece 1 in the front-back direction.

Claims

1. A rapid milling device for workpiece edges, characterized in that: It includes a cutter head (4) mounted below the milling machine spindle and an arc end mill (2) mounted on the cutter head. The arc end mill (2) includes a cutter body (2-1) for fixing on the cutter head (4) and a cutter head (2-2) set at an obtuse angle to the cutter body. The top of the cutter head (2-2) is a concave arc-shaped cutting edge.

2. The rapid milling device for workpiece edges according to claim 1, characterized in that: The cutting edge has a clearance angle of 10-12° on its arc surface, and there is an edge of no more than 30° between the cutting edge and the rake face.

3. The rapid milling device for workpiece edges according to claim 1, characterized in that: The cutter head (4) has a through hole in the middle and an installation port on the side. The arc end mill (2) is fixed in the installation port of the cutter head (4) by clamping bolts (3).

4. The rapid milling device for workpiece edges according to claim 1, characterized in that: The included angle between the blade body (2-1) and the blade tip (2-2) is 135°.

5. The rapid milling device for workpiece edges according to claim 2, characterized in that: The curvature of the cutting edge is adapted to the radius requirement of the edge arc of the workpiece (1) to be processed.

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