Needle-shaped PCD end mill
By evenly distributing diamond-shaped cutting blocks and mesh-like chip grooves at the end of the micro PCD milling cutter, the machining errors and premature scrapping caused by uneven wear are solved, achieving high-precision and low-cost machining results.
Patent Information
- Application Number
- CN202422866121.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-11-25
AI Technical Summary
Existing micro PCD end mills suffer from machining errors and premature failure due to uneven particle wear during processing, affecting machining accuracy and cost.
Evenly distributed diamond-shaped cutting blocks at the end of the tool body form a mesh-like chip removal groove, ensuring uniform wear of the cutting blocks and increasing the contact area with coolant. The overlapping area ensures machining accuracy and strength.
It improves machining accuracy, extends the service life of milling cutters, reduces machining costs, and maintains the strength and cooling effect of the machining end.
Smart Images
Figure CN223518721U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to PCD milling cutter technical field especially relates to a needle PCD end mill. BACKGROUND
[0002] PCD milling cutter adopts polycrystalline diamond as cutting edge, has high hardness, wear resistance, good thermal conductivity, low friction coefficient and low thermal expansion coefficient etc.
[0003] End mill is usually used in groove milling, boring, plane milling etc.
[0004] Common micro end mill is mostly needle-shaped end mill or cone-shaped end mill, and the needle-shaped end mill further reduces tool strength because of the small diameter of the tool surface, so part of the needle-shaped end mill selects the sharp particles made of PCD material on the surface instead of the blade to carry out milling processing, but the sharp particles cannot guarantee uniform distribution, and the different wear degrees of the particles may cause precision difference of the same processing surface in the long-term use, and the different wear degrees may cause the end mill to be scrapped before complete scrapping, resulting in rising processing cost, and the operator needs to pay attention for a long time to avoid irreversible error of the processed workpiece caused by uneven wear. SUMMARY
[0005] In order to make up for the deficiency of the prior art, the utility model aims at solving the problems in the prior art that setting the blade on the processing end reduces the strength of the processing end, and setting the sharp particles instead of the blade may cause processing error caused by different wear degrees of the particles, and the inconsistent wear degree may also cause the end mill to be scrapped in advance, and even cause irreversible damage to the workpiece.
[0006] In order to solve the problems in the prior art, the technical scheme of the utility model is as follows: including the cutter body and the processing end arranged at the tail end of the cutter body, the surface of the processing end is axially distributed with a plurality of groups of rhombic cutting blocks, each group of cutting blocks is uniformly distributed around the ring array of the processing end, and the two acute angle ends of the cutting block are symmetrically directed to both sides.
[0007] Further, each group of cutting blocks adjacent in the axial direction is uniformly staggered to ensure that the cutting blocks can be uniformly distributed on the surface of the processing end.
[0008] Further, the gap between the cutting blocks constitutes a mesh-shaped chip removal groove, which can increase the contact area with the cooling liquid or air while quickly discharging the iron chips outward, thereby improving the cooling effect.
[0009] Further, the horizontal direction between the two groups of axially adjacent cutting blocks has an overlapping area, so that there is always an overlapping area between the vertical cutting blocks and the adjacent horizontal cutting blocks, thereby ensuring the progress of the machined plane.
[0010] Further, the vertical direction between the two groups of axially adjacent cutting blocks has an overlapping area, so that there is always an overlapping area between the horizontal cutting blocks and the adjacent vertical cutting blocks, thereby ensuring the progress of the machined plane.
[0011] Further, the acute angle part of the rhombic cutting block has a minimum angle of 10° and a maximum angle of 25°, which ensures the adaptation to various use cases.
[0012] Compared with the prior art, the utility model has the following advantages:
[0013] The utility model discloses a cutting block of PCD material is arranged evenly on the machining end of the cutter body, and no matter the machining end is used for vertical machining such as vertical surface milling, hole drilling or hole diameter polishing or horizontal machining such as slotting, wide slotting or vertical surface polishing, the cutting block on each machining end surface will have a moving overlapping part with the adjacent cutting block, thereby ensuring machining precision, and the mesh-shaped chip removal groove is left between the cutting blocks, so that the metal chips generated during machining can be discharged outward quickly, the contact area with the cooling liquid is increased, the cooling effect is ensured to be sufficient, and during the machining process, all the cutting blocks are in contact with the workpiece, so that the wear degree of the cutting blocks is the same, the machining precision of the workpiece is not influenced by the different wear, the machining precision is ensured, the service life of the overall structure is prolonged, the diameter of the machining end is not reduced, and the strength of the machining end is maintained. BRIEF DESCRIPTION OF DRAWINGS
[0014] Fig. 1 It is a schematic view of the overall structure of the utility model.
[0015] Fig. 2 It is an enlarged schematic view of the machining end structure of the utility model.
[0016] The reference signs are as follows: 1, cutter body; 2, machining end; 3, cutting block. DETAILED DESCRIPTION
[0017] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.
[0018] As Figs. 1-2 shown, a needle-shaped PCD end mill includes a cutter body 1 and a machining end 2 arranged at the end of the cutter body 1, and a plurality of groups of rhombic cutting blocks 3 are axially distributed on the surface of the machining end 2, each group of cutting blocks 3 is uniformly distributed in a ring array around the machining end 2, and there is an overlapping area in the horizontal direction between two axially adjacent groups of cutting blocks 3, so that there is always an overlapping area between the vertical cutting blocks and the adjacent horizontal cutting blocks, and there is an overlapping area in the vertical direction between two axially adjacent groups of cutting blocks 3, so that there is always an overlapping area between the horizontal cutting blocks and the adjacent vertical cutting blocks, ensuring the progress of the machined plane;
[0019] The two acute angle ends of the cutting block 3 are symmetrically directed to both sides, the minimum angle of the acute angle part of the rhombic cutting block is 10°, and the maximum angle is 25°, which ensures the adaptation to various use cases, and each group of axially adjacent cutting blocks 3 is uniformly staggered, which ensures that the cutting blocks can be uniformly distributed on the surface of the machining end, and the gap between the cutting blocks 3 forms a network-shaped chip removal groove, which can increase the contact area with the cooling liquid or air while quickly discharging the iron filings outward, thereby improving the cooling effect.
[0020] Working principle: first, the cutter body 1 drives the machining end 2 and the cutting block 3 to rotate under the action of the milling machine, and in the use process, the overall structure is transmitted while moving in the vertical or horizontal direction, and in the moving process, it is in contact with the workpiece, the first time of contact, the cutting block 3 on the surface of the machining end 2 will cut the metal on the surface of the workpiece to produce iron filings, the iron filings will be affected by the chip removal groove between the cutting blocks 3 on the surface of the machining end 2 and leave the machining place, avoiding affecting the subsequent machining, at the same time, the cooling liquid is sprayed to the surface of the machining end 2, the network-shaped chip removal groove increases the contact area between the whole machining end 2 and the cooling liquid, optimizes the cooling effect, prolongs the service life of the overall structure, and when the machining end surface 2 is in contact with the workpiece, the vertical cutting block 3 and the horizontal cutting block 3 exist between each other. The overlapping area when moving ensures the progress of the machined plane.
[0021] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A PCD needle bit comprising a body (1) and a working end (2) provided at a distal end of the body (1), characterised in that: The surface of the machining end (2) is axially distributed with several groups of diamond-shaped cutting blocks (3), each group of cutting blocks (3) is uniformly distributed around the annular array of the machining end (2), and the two acute angle ends of the cutting blocks (3) are symmetrically directed to both sides.
2. A PCD needle-shaped end mill according to claim 1, wherein: Each group of axially adjacent cutting blocks (3) is uniformly staggered.
3. A PCD needle-shaped end mill according to claim 2, wherein: The gap between the cutting blocks (3) constitutes a network-shaped chip removal groove.
4. A PCD needle-shaped end mill according to claim 3, wherein: The axially adjacent two groups of cutting blocks (3) have an overlapping area in the horizontal direction.
5. A PCD needle-shaped end mill according to claim 3, wherein: The axially adjacent two groups of cutting blocks (3) have an overlapping area in the vertical direction.
6. A PCD needle-shaped end mill according to claim 1, wherein: The acute angle part of the diamond-shaped cutting block (3) has a minimum angle of 10° and a maximum angle of 25°.