Forming milling cutter structure special for aerospace

Abstract

The utility model discloses a special forming milling cutter structure for aerospace, which comprises a cutter body, one end of the cutter body is provided with a cutting part, and the cutting part is provided with a plurality of cutting edges which are uniformly distributed along the circumferential direction; the milling cutter has the beneficial effects that the axial position stability of the milling cutter in the machining process can be ensured, unnecessary stress and vibration of the cutter in the machining process can be reduced, the cutter can work in a good state, the service life of the cutter is prolonged, the production cost is reduced, cooling liquid enters from an inlet of the cooling liquid channel, and the service life of the cutter is prolonged. And the cutting fluid is sprayed to the position near the cutting edge of the cutting edge through the small flow dividing holes to cool and lubricate the cutting area, reduce the cutting temperature and prevent the tool from overheating deformation, so that the precision of the machining size is ensured, friction and abrasion between the tool and a workpiece are reduced, and the machining quality and the durability of the tool are further improved.

Description

Technical Field

[0001] This utility model relates to a forming milling cutter, specifically a special forming milling cutter structure for aerospace applications, and belongs to the field of milling cutter technology. Background Technology

[0002] In the aerospace field, many components have complex shapes and high precision requirements. For example, irregularly shaped grooves in aircraft engine blades and structural parts cannot be machined efficiently and with high precision using ordinary milling cutters.

[0003] In existing technologies, such as the aerospace-grade form milling cutter disclosed in announcement number CN201720586904.6, which conforms to the inner hole of an aerospace connector and completes multiple machining steps with a single cutter, the number of times equipment needs to be changed and the number of times the cutter and workpiece need to be clamped can be reduced, which can effectively improve machining efficiency and product quality. The variable tooth number scheme ensures smooth chip removal and high tooth strength in the conical part of the cutter teeth. The cutter teeth are helical, resulting in uniform cutting force. However, the above-mentioned existing technical solutions have the following shortcomings: During the use of the form milling cutter device, there may be instances where the milling cutter is not lubricated in time, which can cause the milling cutter to jam during operation, resulting in uneven cutting force distribution, poor chip removal, and rapid tool wear. This leads to low machining efficiency, unstable machining quality, and short tool life, thereby causing milling cutter wear and shortening the service life of the milling cutter. Utility Model Content

[0004] The purpose of this utility model is to provide a special forming milling cutter structure for aerospace applications in order to solve at least one of the above-mentioned technical problems.

[0005] This utility model achieves the above-mentioned objectives through the following technical solution: a special forming milling cutter structure for aerospace applications, comprising a cutter body;

[0006] The tool body has a cutting section at one end, which has multiple cutting edges evenly distributed along the circumference. The cutting edges are spirally arranged around the end of the tool body, and multiple chip-breaking grooves are spaced apart on the cutting edges. The chip-breaking grooves extend spirally from the cutting edge of the cutting edge to one end of the tool body. A coolant channel is arranged axially inside the tool body. The outlet of the coolant channel is located near the cutting edge of the cutting section and is connected to the vicinity of the cutting edge of each cutting edge through multiple diversion holes.

[0007] As a further improvement of this utility model: a tool holder is provided at the other end of the tool body, the tool holder and the tool body adopt an integrated structural design, and the surface of the tool holder is provided with a positioning keyway and a threaded hole for connection with the machine tool.

[0008] As a further improvement of this invention, the helix angle of the cutting edge is 30°-45°.

[0009] As a further improvement of this utility model, the depth of the chip-breaking groove is 1 / 3 to 1 / 2 of the cutting edge height, and its width gradually increases from the cutting edge inward.

[0010] As a further improvement of this invention: the inlet of the coolant channel is located at the tail of the tool holder and is connected to a coolant quick connector.

[0011] As a further improvement of this utility model, the cutting edge is made of cemented carbide and its surface is coated with a wear-resistant and high-temperature resistant coating.

[0012] The beneficial effects of this utility model are:

[0013] This utility model is equipped with a cutting section, cutting edge, chip divider, coolant channel, diversion hole and positioning keyway, etc. The positioning keyway engages with the corresponding key on the machine tool spindle, so that the milling cutter can always maintain a fixed angular position during rotation, which helps to improve the accuracy of the machined shape, reduce shape error, and, together with the fastening of the threaded hole, ensure the axial position stability of the milling cutter during the machining process. The precisely fixed tool holder can reduce unnecessary stress and vibration on the tool during the machining process, so that the tool can work in good condition, extend the tool life, and reduce production costs.

[0014] The cutting edge is helical and has a suitable helix angle, which can distribute the cutting force evenly, reduce tool vibration and deformation, and the chip flute can effectively divide the chips into small segments, making the chip discharge smoother and preventing the chips from accumulating in the machining area, which would affect the machining accuracy and tool life.

[0015] Coolant enters through the inlet of the coolant channel and is sprayed onto the vicinity of the cutting edge via the diversion orifice. It cools and lubricates the cutting area, reduces the cutting temperature, prevents tool overheating and deformation, controls the tool temperature within a reasonable range, maintains the dimensional stability of the tool, and avoids the thermal expansion and deformation of the tool material caused by the high cutting speed and the enormous cutting heat. This ensures the accuracy of the machining dimensions, reduces friction and wear between the tool and the workpiece, and further improves the machining quality and the durability of the tool. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 In this utility model Figure 1 A schematic diagram of the side view structure;

[0018] Figure 3 In this utility model Figure 1 Structural sectional view;

[0019] Figure 4 In this utility model Figure 2 Enlarged schematic diagram of the structure at point A in the diagram;

[0020] In the diagram: 1. Tool body; 2. Cutting section; 3. Cutting edge; 4. Chip divider groove; 5. Coolant channel; 6. Diverter orifice; 7. Tool holder; 8. Locating keyway; 9. Threaded hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0022] like Figures 1 to 4 As shown, a special-purpose forming milling cutter structure for aerospace applications includes a cutter body 1;

[0023] The tool body 1 has a cutting section 2 at one end. The cutting section 2 has multiple cutting edges 3 evenly distributed along the circumference. The cutting edges 3 are spirally arranged around the end of the tool body 1. Multiple chip-breaking grooves 4 are provided on the cutting edges 3 at intervals. The chip-breaking grooves 4 extend spirally from the cutting edge of the cutting edge 3 to one end of the tool body 1. A coolant channel 5 is provided axially inside the tool body 1. The outlet of the coolant channel 5 is located near the cutting edge of the cutting section 2 and is connected to the vicinity of the cutting edge of each cutting edge 3 through multiple diversion holes 6.

[0024] The other end of the tool body 1 is provided with a tool holder 7. The tool holder 7 and the tool body 1 adopt an integrated structural design. The surface of the tool holder 7 is provided with a positioning keyway 8 and a threaded hole 9 for connecting with the machine tool.

[0025] The positioning keyway 8 engages with the corresponding key on the machine tool spindle, ensuring that the milling cutter maintains a fixed angular position during rotation. This helps improve the accuracy of the machined shape, reduce shape errors, and, together with the tightening of the threaded hole 9, ensures the axial position stability of the milling cutter during machining. The precisely fixed tool holder reduces unnecessary stress and vibration on the tool during machining, allowing the tool to work in good condition and extending its service life.

[0026] The helix angle of cutting edge 3 is 30°-45°.

[0027] Because the cutting edge 3 is helical and has a suitable helix angle, the cutting force can be evenly distributed, reducing tool vibration and deformation, thereby improving tool life.

[0028] The depth of the chip groove 4 is 1 / 3 to 1 / 2 of the cutting edge height, and its width gradually increases from the cutting edge inward.

[0029] Chip divider 4 can effectively divide chips into small segments, making chip discharge smoother and preventing chips from accumulating in the machining area, which would affect machining accuracy and tool life.

[0030] The inlet of coolant channel 5 is located at the tail of the tool holder and is connected to a coolant quick connector.

[0031] The coolant enters through the inlet of the coolant channel 5 and is sprayed through the diversion hole 6 to the vicinity of the cutting edge 3, cooling and lubricating the cutting area, reducing the cutting temperature, reducing friction and wear between the tool and the workpiece, and further improving the machining quality and tool durability.

[0032] The cutting edge 3 is made of cemented carbide and has a wear-resistant and high-temperature resistant coating on its surface.

[0033] Working principle: In use, the tool holder 7 is first precisely connected and fixed to the machine tool spindle through the positioning keyway 8 and threaded hole 9. The positioning keyway 8 matches the corresponding key on the machine tool spindle, so that the milling cutter can always maintain a fixed angular position during rotation, which helps to improve the accuracy of the machined shape and reduce shape error. With the tightening of the threaded hole 9, the axial position of the milling cutter can be ensured to be stable during the machining process. The precisely fixed tool holder can reduce unnecessary stress and vibration on the tool during the machining process, so that the tool can work in good condition, extend the tool's service life, and reduce production costs. In the process of machining aerospace parts, the machine tool drives the milling cutter to rotate, and the cutting edge 3 contacts the workpiece to perform cutting.

[0034] Because the cutting edge 3 is helical and has a suitable helix angle, the cutting force can be evenly distributed, reducing tool vibration and deformation. The chip groove 4 can effectively divide the chips into small segments, making the chip discharge smoother and preventing the chips from accumulating in the machining area, which would affect machining accuracy and tool life.

[0035] Meanwhile, coolant enters from the inlet of coolant channel 5 and is sprayed onto the edge of cutting edge 3 through the diversion hole 6 to cool and lubricate the cutting area, reduce the cutting temperature, prevent tool overheating and deformation, control the tool temperature within a reasonable range, maintain the dimensional stability of the tool, and avoid the tool being subjected to huge cutting heat due to the high cutting speed, which would cause thermal expansion and deformation of the tool material. This ensures the accuracy of the machining dimensions, reduces friction and wear between the tool and the workpiece, and further improves the machining quality and the durability of the tool.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A special forming milling cutter structure for aerospace applications, comprising a cutter body (1); Its features are: The tool body (1) is provided with a cutting part (2) at one end. The cutting part (2) has multiple cutting edges (3) evenly distributed along the circumferential direction. The cutting edges (3) are spirally surrounding the end of the tool body (1). Multiple chip-breaking grooves (4) are provided on the cutting edges (3) at intervals. The chip-breaking grooves (4) extend spirally from the cutting edge of the cutting edge (3) to one end of the tool body (1). A coolant channel (5) is provided axially inside the tool body (1). The outlet of the coolant channel (5) is located near the cutting edge of the cutting part (2) and is connected to the vicinity of the cutting edge of each cutting edge (3) through multiple diversion holes (6).

2. The aerospace-grade special forming milling cutter structure according to claim 1, characterized in that: The other end of the tool body (1) is provided with a tool holder (7). The tool holder (7) and the tool body (1) adopt an integrated structure design. The surface of the tool holder (7) is provided with a positioning keyway (8) and a threaded hole (9) for connecting with the machine tool.

3. The aerospace-grade special forming milling cutter structure according to claim 1, characterized in that: The helix angle of the cutting edge (3) is 30°-45°.

4. The aerospace-grade special forming milling cutter structure according to claim 1, characterized in that: The depth of the chip groove (4) is 1 / 3 to 1 / 2 of the cutting edge height, and its width gradually increases from the cutting edge inward.

5. The aerospace-grade special forming milling cutter structure according to claim 1, characterized in that: The inlet of the coolant channel (5) is located at the tail of the tool holder and is connected to a coolant quick connector.

6. The aerospace-grade special forming milling cutter structure according to claim 1, characterized in that: The cutting edge (3) is made of cemented carbide and has a wear-resistant and high-temperature resistant coating on its surface.

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