A milling cutter for machining ceramic glass
By designing a spiral end mill that integrates roughing, finishing, and chamfering functions, the problem of frequent tool changes in ceramic and glass processing has been solved, improving processing efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BIEL OPTIC HUIZHOU
- Filing Date
- 2025-03-31
- Publication Date
- 2026-06-09
AI Technical Summary
In existing technologies, the frequent replacement of roughing and finishing tools during the milling of ceramics and glass results in time-consuming and labor-intensive processing, and the finished products are prone to defects such as chipping, burrs, and other defects, which affect the yield of finished products.
Design a milling cutter that integrates roughing, finishing, and chamfering helical cutting edges into one unit. The roughing, finishing, and chamfering processes are combined into one through a helical path, reducing the need for cutter head replacement. A specific helical angle and chamfering structure are used to reduce defects.
It achieves high efficiency, saves time and labor in the ceramic and glass processing process, reduces defects such as chipping, burrs, and roughness, and improves processing efficiency and yield.
Smart Images
Figure CN224334725U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ceramic glass processing technology, and in particular to a milling cutter for processing ceramic glass. Background Technology
[0002] Ceramic glass is a widely used polycrystalline solid material that combines the properties of both ceramics and glass. Milling machines are commonly used to machine ceramic glass. In existing technologies, milling cutters are often used to create perforated patterns in ceramic glass, typically involving two steps: roughing and finishing. The resulting perforated patterns have very sharp edges, often resulting in defects such as chipping, burrs, and other imperfections. These defects can easily lead to cracking during subsequent debinding and sintering, significantly impacting the yield of the finished product. Using roughing and finishing cutters can reduce these defects to some extent, but frequent changes between them are time-consuming and labor-intensive. Therefore, there is an urgent need for a cutting tool that saves time and labor during the milling process while reducing defects, thereby improving the yield and processing efficiency. Utility Model Content
[0003] Based on this, it is necessary to address the above-mentioned shortcomings by providing a milling cutter for machining ceramic glass, comprising: a shank and a bottom cutting edge fixed to one end of the shank, wherein the circumferential side of the bottom cutting edge is provided with a plurality of grooves, the grooves extending upward along a spiral path around the central axis of the shank, and two adjacent grooves forming a spiral cutting edge, characterized in that the spiral cutting edge is provided from top to bottom with a roughing section having a coarse cutting edge, a buffer section, a finishing section having a finishing cutting edge, and a first chamfering section.
[0004] Preferably, the bottom end of the roughened portion is provided with a second chamfer.
[0005] Preferably, the second chamfer is a rounded corner with a radius of 0.2 mm and an angle of 45°.
[0006] Preferably, the height of the roughing section is 1.5mm, the height of the buffer section is 0.5mm, the height of the finishing section is 1.5mm, and the first chamfer is a straight chamfer with a height of 2mm and an angle of 45°.
[0007] Preferably, the finishing section includes an extension area located within the first chamfer and a non-extension area located below the extension area, wherein the angle between the extension area and the non-extension area is 135°.
[0008] Preferably, the height of the extended area is 0.47-0.57 mm, and the height of the non-extended area is 1 mm.
[0009] Preferably, the helix angle of the spiral blade is 30° to 80°.
[0010] Preferably, the spiral blade comprises a first spiral segment, a second spiral segment, and a third spiral segment from bottom to top along its spiral direction, with a smooth transition between the first spiral segment, the second spiral segment, and the third spiral segment. The spiral angle of the first spiral segment is 80°, the spiral angle of the second spiral segment is 60°, and the spiral angle of the third spiral segment is 30°.
[0011] The aforementioned milling cutter for machining ceramic glass combines the roughing, finishing, and chamfering processes into a single milling cutter head. This allows the same cutter head to be used for the three processes of roughing, finishing, and chamfering in the ceramic glass sheet drilling process, eliminating the need to change cutter heads when switching between different processes. This saves time on cutter head changes, reduces defects such as chipping, burrs, and rough edges at the drilling edges, and improves the efficiency and yield of ceramic glass milling. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the partitions of a milling cutter used for machining ceramic glass in one embodiment (the cutting edge is not shown).
[0013] Figure 2 This is a schematic diagram (with cutting edge) of a milling cutter used for machining ceramic glass in one embodiment.
[0014] Figure 3 This is a partially enlarged schematic diagram (with cutting edge) of a milling cutter used for machining ceramic glass in one embodiment.
[0015] Explanation of reference numerals in the attached drawings: 100-handle, 200-bottom edge, 300-spiral blade, 300a-groove, 310-roughing section, 311-roughing edge, 312-second chamfer, 320-buffer section, 330-finishing section, 331-finishing edge, 340-first chamfer section, 400a-avoiding groove. Detailed Implementation
[0016] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0017] Please combine Figure 1-3This utility model discloses a milling cutter for processing ceramic glass, including a shank 100 and a bottom cutting edge 200 disposed at the lower end of the shank 100. The bottom cutting edge 200 has multiple grooves 300a evenly distributed along its circumferential direction on its circumferential side. These grooves 300a extend upwards along a spiral path, forming a spiral cutting edge 300 between adjacent grooves 300a, used for cutting the hole wall during drilling. The spiral cutting edges 300 on the outer side of the bottom cutting edge 200, according to their different functions, are arranged from bottom to top as follows: a coarse cutting section 310 with a coarse cutting edge 311, a buffer section 320, a finishing section 330 with a finishing cutting edge 331, and a first chamfering section 340. The bottom cutting edge 200 is used to mill a hole in the ceramic glass panel. The roughing part 310 is used to quickly cut the hole wall material in the hole to enlarge the hole. The finishing part 330 is used to cut the hole wall at a slow speed in the hole to repair the uneven hole wall and hole edge after roughing. The first chamfering part 340 is used to chamfer the hole edge to reduce the occurrence of defects such as chipping, burrs and rough edges.
[0018] It should be noted that, Figure 1 The diagram provided here is merely a schematic representation of the milling cutter's partitions and is intended only to facilitate understanding of the relative positions of the bottom cutting edge 200, roughing section 310, buffer section 320, finishing section 330, and first chamfering section 340 on the milling cutter. The dimensions of each part are not accurate.
[0019] The general procedure for using the milling cutter of this utility model for machining ceramic glass to make holes is as follows: First, prepare for the work by installing the milling cutter of this utility model on the milling machine and suctioning the ceramic glass plate to be drilled onto the worktable of the milling machine using a vacuum suction cup to ensure that the ceramic glass plate will not move during processing. Adjust the working parameters of the milling machine according to the specifications of the ceramic glass plate. Second, perform the actual drilling process by positioning the cutter above the position where the hole needs to be drilled on the ceramic glass plate using the positioning system of the milling machine. Start the milling machine and use the bottom cutting edge 200 to mill the hole at the target position. Use the roughing section 310 to make the hole size close to the target size, but leave enough for the finishing section 330 to finish. After finishing, there is no need to change the cutter head. Directly use the first chamfering section of the milling cutter of this utility model to chamfer the edge of the hole. Finally, perform subsequent work such as cleaning, quality inspection, and warehousing. This utility model's milling cutter combines three types of tools—roughing, finishing, and chamfering—into one, integrating the three processes of roughing, finishing, and chamfering. This reduces the need for tool changes and tool setting in different processes, effectively shortening the time for drilling holes in ceramic and glass sheets and improving work efficiency.
[0020] To improve the hole-opening effect of the milling cutter of this utility model, in one embodiment, such as Figure 2As shown in Figure 3, the bottom cutting edge 200 of this utility model has a second chamfer 312 on its outer edge, that is, a second chamfer 312 is formed at the junction of the bottom cutting edge 200 and the roughing portion 310. Before the chamfer is formed on the bottom cutting edge 200, its edge is very sharp. In actual production, the sharp bottom cutting edge 200 is prone to breakage. Using a bottom cutting edge 200 with a chamfer on its outer edge can effectively reduce the occurrence of breakage, reduce waste in production, and increase the yield rate. In this embodiment, the second chamfer 312 is a rounded corner with a radius of 0.2 mm and an angle of 45°.
[0021] In one embodiment, such as Figure 2 , Figure 3 As shown, the height of the roughing section 310 is 1.5mm, the height of the buffer section 320 is 0.5mm, the height of the finishing section 330 is 1.5mm, and the first chamfer section 340 is a straight chamfer with a height of 2mm and an angle of 45°. The milling cutter provided by this utility model is mainly used for opening staggered holes in ceramic glass plates. The thickness of the plate is generally between 1.5mm and 1.7mm. In this embodiment, the plate thickness is 1.699mm. For this size and specification of milling cutter, when the roughing section 310 completes the roughing of the entire hole, this... The depth buffer section 320 can enter the hole, and the roughing section 310 can fully handle the roughing work of commonly used plates. The buffer section serves as a transition between the roughing section 310 and the finishing section 330 to perform preliminary finishing on the surface after roughing. When the 1.5mm finishing section 330 is just fully inside the hole, the first chamfering section 340 begins to chamfer the edge of the hole. When the finishing section 330 completes the finishing of the entire hole depth, the first chamfering section 340 can also complete the chamfering work at the same time. Therefore, the milling cutter of the above size can be adapted to commonly used specifications of ceramic and glass plates. The milling cutter of this utility model has the following ratio range: roughing section: buffer section: finishing section: first chamfer section = (2.5-3.5):1:(2.5-3.5):(3.5-4.5), of which the optimal ratio is 3:1:3:4. In actual production, the specific size and ratio of the roughing section 310, buffer section 320, finishing section 330 and first chamfer section 340 can be selected according to the size of the ceramic glass plate to be processed.
[0022] In one embodiment, such as Figure 2 , Figure 3As shown, the finishing edge 331 of the finishing section 330 extends into the first chamfering section 340, making the lower part of the first chamfering section 340 the finishing edge 331. The finishing edge 331 can effectively remove burrs and prevent chipping during milling. After finishing the hole wall in the channel using the finishing section 330, it is necessary to chamfer the hole edge. At this time, the hole edge is relatively sharp. Since ceramic glass itself is hard and brittle with poor toughness and high sensitivity to crack propagation, directly chamfering the hole edge using the first chamfering section 340 will cause chipping. When the chipping exceeds the chamfering range, it means that a crack has appeared on the hole edge, which greatly affects the hole opening quality. The finishing blade 331 of the finishing section 330 extends into the first chamfering section 340. When chamfering the edge of the pre-drilled hole, the edge is finished by the finishing blade 331 of the finishing section 330. This edge fits snugly against the finishing blade 331 extending into the first chamfering section 340. After chamfering begins, the finishing blade 331 in the extended area slowly and evenly cuts the edge. When the finishing blade 331 has cut the edge parallel to the first chamfering section 340, the chamfering tool of the first chamfering section 340 continues to cut, completing the chamfering process. Using the finishing blade 331 in the extended area to finish and chamfer the sharp edge of the hole is essentially trimming the area to be chamfered, making the chamfered surface of the edge parallel to the cutting interface of the chamfering tool, thus achieving even cutting. This greatly reduces the possibility of edge chipping and improves the yield rate of opening holes in ceramic glass sheets. The angle between the extended area of the finishing section 330 within the first chamfered portion 340 and the non-extended area of the finishing section 330 below the extended area ranges from 120° to 150°. In this embodiment, the angle between the extended area of the finishing section 330 within the first chamfered portion 340 and the non-extended area of the finishing section 330 below the extended area is 135°. At this angle, the milling cutter cuts more smoothly, reducing the collision between the tool and the sheet metal, improving processing efficiency, and extending tool life. In one embodiment, the height of the extended area is 0.47 mm, and the height of the non-extended area is 1 mm. In another embodiment, the height of the extended area is 0.57 mm, and the height of the non-extended area is 1 mm. In yet another embodiment, the height of the extended area is 0.50 mm, and the height of the non-extended area is 1 mm. In still another embodiment, the height of the extended area is 0.55 mm, and the height of the non-extended area is 1 mm.
[0023] The helix angle of a milling cutter refers to the angle between the helix of the helical cutting edge 300 and the axis of the milling cutter. The milling cutter provided by this utility model has a helix angle of 30° to 80° for its helical cutting edge 300. In this embodiment, each helical cutting edge 300 of the milling cutter is divided into three helical segments, each with a different helix angle, namely the first helical segment, the second helical segment, and the third helical segment. The first helical segment, the second helical segment, and the third helical segment transition smoothly. The helix angle of the first helical segment is 80°, the helix angle of the second helical segment is 60°, and the helix angle of the third helical segment is 30°. In this embodiment, the helix angles of the three helical segments are smaller than those of the prior art. The contact line between the helical cutting edge 300 and the plate is relatively short, the shearing action on the chip during the chip formation process is relatively concentrated, the chip deformation is smaller, and relatively thin and narrow chips are formed. In addition, for ceramic and glass materials with high hardness and low toughness, the generated chips are not easy to curl and break. The smaller helix angle helps to control the chip shape and make it easier to be discharged. Moreover, the smaller helix angle makes the helical cutting edge thicker, which can maintain better edge sharpness and strength when cutting ceramic and glass materials, and significantly improve the vibration pattern.
[0024] In one embodiment, such as Figure 2 , Figure 3 As shown, two clearance grooves 400a are also formed on the circumferential surface of the bottom cutting edge 200. The clearance grooves 400a extend along a helical path in the axial direction of the tool holder 100. In this embodiment, the width of the clearance grooves 400a is greater than the width of the grooves 300a, and the helix angle is greater than the helix angle of the grooves 300a. During the cutting process, the clearance grooves 400a reduce the contact area between the non-cutting part of the tool and the material, thus avoiding excessive friction and heat generation, which affects the quality of the material and the tool life. In addition, the clearance grooves 400a open up an additional chip removal channel, which can accelerate chip removal and prevent blockage.
[0025] The aforementioned milling cutter for machining ceramic glass combines the roughing, finishing, and chamfering processes into a single milling cutter head. This allows the same cutter head to be used for the three processes of roughing, finishing, and chamfering in the ceramic glass sheet drilling process, eliminating the need to change cutter heads when switching between different processes. This saves time when changing cutter heads, reduces defects such as chipping, burrs, and rough edges at the drilling edges, and improves the efficiency and yield of ceramic glass milling.
[0026] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0027] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A milling cutter for machining ceramic glass, comprising a shank (100) and a bottom cutting edge (200) fixed to one end of the shank (100), wherein the bottom cutting edge (200) has a plurality of grooves (300a) formed on its circumferential side surface, the grooves (300a) extending upward along a helical path around the central axis of the shank (100), and adjacent grooves (300a) forming a helical cutting edge (300), characterized in that, The spiral blade (300) is provided from top to bottom as follows: a coarse cutting section (310) with a coarse cutting edge (311), a buffer section (320), a fine cutting section (330) with a fine cutting edge (331), and a first chamfer section (340).
2. The milling cutter for machining ceramic glass according to claim 1, characterized in that, The bottom end of the rough opening (310) is provided with a second chamfer (312).
3. The milling cutter for machining ceramic glass according to claim 2, characterized in that, The second chamfer (312) is a rounded corner with a radius of 0.2 mm and an angle of 45°.
4. The milling cutter for machining ceramic glass according to claim 1, characterized in that, The height of the roughing section (310) is 1.5 mm, the height of the buffer section (320) is 0.5 mm, the height of the finishing section (330) is 1.5 mm, and the first chamfer section (340) is a straight chamfer with a height of 2 mm and an angle of 45°.
5. The milling cutter for machining ceramic glass according to claim 1, characterized in that, The finishing section (330) includes an extension area located within the first chamfered section (340) and a non-extension area located below the extension area, wherein the angle between the extension area and the non-extension area is 135°.
6. The milling cutter for machining ceramic glass according to claim 5, characterized in that, The height of the extended area is 0.47-0.57 mm, and the height of the non-extended area is 1 mm.
7. The milling cutter for machining ceramic glass according to claim 1, characterized in that, The spiral angle of the spiral blade (300) is 30° to 80°.
8. The milling cutter for machining ceramic glass according to claim 7, characterized in that, The spiral blade (300) includes a first spiral segment, a second spiral segment and a third spiral segment from bottom to top along its spiral direction. The first spiral segment, the second spiral segment and the third spiral segment are smoothly transitioned. The spiral angle of the first spiral segment is 80°, the spiral angle of the second spiral segment is 60° and the spiral angle of the third spiral segment is 30°.
9. The milling cutter for machining ceramic glass according to claim 1, characterized in that, The bottom cutting edge (200) also has at least one clearance groove (400a) on its annular side. The clearance groove (400a) extends upward along a spiral path in the axial direction of the handle (100). The width of the clearance groove (400a) is greater than the width of the groove (300a).
10. The milling cutter for machining ceramic glass according to claim 9, characterized in that, The helix angle of the clearance groove (400a) is greater than that of the groove (300a).