PCD spiral multi-edge end mill
By placing a tubular PCD layer on the outside of the cemented carbide column and opening a spiral groove on it, a PCD spiral multi-edge end mill is designed, which solves the problem that traditional tools are difficult to prepare large spiral blades, and efficient carbon fiber composite processing and subsequent fine-tuning operations are achieved.
Patent Information
- Application Number
- CN202520148208.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2035-01-22
AI Technical Summary
When traditional PCD end mills work with carbon fiber composite materials, it is difficult to prepare large spiral cutting edges, resulting in unstable cutting, poor roughness of the workpiece, and subsequent fine adjustments cannot be made.
A PCD spiral multi-edge end mill is designed, and a tubular PCD layer is arranged on the outer side of the column made of carbide. By opening a spiral groove on the PCD layer to form a cutting edge, and a connecting head and a base are provided on the cutting blank to achieve welding connection.
Long-edge end milling with a spiral-shaped edge is realized, cutting edges with arbitrary spiral angles can be opened on the tubular structure cutting blank to form a dense-toothed end mill, which improves the roughness and processing efficiency of the workpiece and reduces costs.
Smart Images
Figure CN222552282U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of end mills, in particular to a PCD spiral multi-edge end mill. Background Art
[0002] In the manufacturing of carbon fiber composite materials, due to the tear-proof processing of layered materials, a sharp cutting edge is required to gradually cut into the workpiece. In order to avoid tearing, the tool needs a cutting edge with a larger helix angle, especially when performing external milling processing, which requires an end mill. In the production process of traditional PCD end mills, the cutting part of the end mill is processed by machining a smaller helix angle on the carbide tool body, then opening a tool pocket around the spiral groove, and finally welding a flat PCD tool blank, using an inclined surface instead of a spiral surface to form a PCD spiral end mill with a similar small helix angle.
[0003] However, the flat blade blank cannot be used to produce a dense-tooth end mill with a large spiral blade, and the workpiece cannot be cut smoothly during cutting, resulting in poor roughness of the machined workpiece. In addition, after the initial angle groove is opened on the column, the number of subsequent cutting edges (number of teeth) is basically limited, and further fine-tuning of the blade cannot be performed according to the actual processing efficiency requirements. Utility Model Content
[0004] The utility model aims to solve the problems in the above-mentioned background technology and provides a PCD spiral multi-edge end mill.
[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0006] The utility model provides a PCD spiral multi-blade end mill, comprising a cutter blank and a connecting part, wherein the cutter blank comprises a column, the column is made of a cemented carbide material, an outer fixed sleeve of the column is provided with a PCD layer, a plurality of spiral grooves in a spiral shape are provided on the PCD layer, and the edges of the spiral grooves constitute cutting edges; a connecting head is provided at the end of the cutter blank away from the cutting edge, a base is provided on the connecting part, and the cutter blank is fixedly embedded on the base through the connecting head.
[0007] Furthermore, the connector is conical, and the base is adapted to the connector.
[0008] Furthermore, the connecting portion is made of cemented carbide, and the connecting portion is connected to the column by welding.
[0009] Furthermore, the side edges of the spiral groove constitute peripheral edges, and the end edges of the spiral groove constitute end edges; the end edges are arranged on the front side of the column.
[0010] Furthermore, the diameter of the blade blank ranges from 8 mm to 25 mm, and the length of the cutting edge along the axial direction ranges from 5 mm to 50 mm.
[0011] The beneficial effects of the utility model are:
[0012] 1. A PCD layer with a tubular structure is set on the outside of a cemented carbide cylinder, so that the tool blank has a tubular structure, thereby realizing the processing of a spiral cutting edge, which enables long-edge end milling, and the cutting edge of the end mill with any spiral angle can be opened on the tool blank with a tubular structure. After repeatedly and densely opening spiral grooves, a dense-tooth end mill is formed, which cuts into the workpiece smoothly and has a better roughness of the processed workpiece.
[0013] 2. By setting up a tubular blade blank, not only can the cost be effectively controlled, but also new cutting edges can be opened on it at will, which is convenient for further fine-tuning of the blade according to the actual processing efficiency requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 A schematic diagram of the structure of a PCD spiral multi-edge end mill provided by the utility model;
[0015] Figure 2 The utility model provides a cross-sectional structural schematic diagram of a PCD spiral multi-edge end mill.
[0016] In the figure, 1, blade blank; 11, cylinder; 12, PCD layer; 121, spiral groove; 122, cutting edge; 1221, peripheral edge; 1222, end edge; 13, connector; 2, connecting part; 21, base. DETAILED DESCRIPTION
[0017] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.
[0018] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.
[0019] Example 1
[0020] like Figure 1~Figure 2 As shown, a PCD spiral multi-edge end mill comprises a cutter blank 1 and a connecting portion 2; one end of the connecting portion 2 made of cemented carbide is used to connect and fix with the cutter blank 1, and the other end is used to clamp and fix with an existing equipment machine tool. The diameter of the cutter blank 1 is 8 mm to 25 mm, and it is composed of a column 11 and a tubular PCD layer 12. Specifically, the PCD layer 12 is formed by stacking diamond powder on the outside of the cemented carbide column 11 through a mold and then pressing it at high temperature and high pressure to form a double-layer structure of the raw material rod, that is, the cutter blank 1, and then A plurality of spiral grooves 121 are formed on the PCD layer 12 of the blade blank 1 by machining, and the edges of the spiral grooves 121 constitute cutting edges 122. The axial length of the cutting edges 122 ranges from 5 mm to 50 mm. The cutting edges 122 located on the peripheral side are peripheral edges 1221, and the cutting edges 122 located on the front end side are end edges 1222. Furthermore, in order to prevent the front end of the column 11 from interfering with the cutting of the end edges 1222, the front end of the column 11 is located at the rear side of the end edges 1222 by machining and grinding.
[0021] Through this solution, it is possible to process a spiral cutting edge, so that long-edge end milling can be performed, and it is possible to open a cutting edge 122 of an end mill with any spiral angle on a tubular blade blank 1. After repeatedly and densely opening spiral grooves 121, a dense-tooth end mill is formed, which smoothly cuts into the workpiece and produces a better roughness of the workpiece. In addition, the tubular blade blank 1 can not only effectively control the cost, but also can open a new cutting edge 122 on it at will, which is convenient for further fine-tuning of the blade according to the actual processing efficiency requirements.
[0022] Furthermore, in order to reduce the difficulty of production, although the column 11 in the knife blank 1 is made of the same material as the connecting part 2, the two are often not an integrally formed structure. Therefore, in order to better fix the knife blank 1 and the connecting part 2, the rear end of the knife blank 1 is milled to form a conical connecting head 13, and the front end of the connecting part 2 is milled to form a base 21 that matches it. The connecting head 13 and the base 21 are welded so that the surfaces of the two are tightly fitted and fixed.
[0023] The working mode of this device:
[0024] When in use, the cutting edge 122 of the present invention mills the workpiece by rotating, and the generated debris falls into the spiral groove 121 and is discharged.
[0025] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.
Claims
1. A PCD spiral multi-edge end mill, characterized by: The invention comprises a knife blank (1) and a connecting portion (2), wherein the knife blank (1) comprises a column (11), the column (11) is made of a hard alloy material, a PCD layer (12) is fixedly sleeved on the outer side of the column (11), a plurality of spiral grooves (121) are provided on the PCD layer (12), and the edges of the spiral grooves (121) constitute cutting edges (122); a connecting head (13) is provided at the end of the knife blank (1) away from the cutting edge (122), a base (21) is provided on the connecting portion (2), and the knife blank (1) is fixedly embedded in the base (21) via the connecting head (13).
2. A PCD spiral multi-edge end mill according to claim 1, characterized in that: The connecting head (13) is conical, and the base (21) is adapted to the connecting head (13).
3. The PCD spiral multi-edge end mill according to claim 1, characterized in that: The connecting portion (2) is made of hard alloy, and the connecting portion (2) is connected to the column (11) by welding.
4. The PCD spiral multi-edge end mill according to claim 1, characterized in that: The side edges of the spiral groove (121) form a peripheral edge (1221), and the end edges of the spiral groove (121) form an end edge (1222); the end edge (1222) is arranged on the front side of the column (11).
5. The PCD spiral multi-edge end mill according to claim 1, characterized in that: The diameter of the blade blank (1) ranges from 8 mm to 25 mm, and the length of the cutting edge (122) along the axial direction ranges from 5 mm to 50 mm.