A segmented cutter capable of automatic chip removal

Abstract

The application discloses a segmented milling cutter capable of automatically discharging chips, which comprises a cutter head and a cutter handle seamlessly welded with the cutter head, wherein the tail end of the cutter handle is connected with a mounting section, the mounting section is used for being connected with a cutter seat, the surface of the cutter head is provided with a chip discharging hole, and a gas supply mechanism generates airflow after the milling cutter is stopped and enables the chip discharging hole to discharge the chips from the cutter groove. The segmented milling cutter capable of automatically discharging chips can fuse the head and the handle together through high temperature by seamless welding, makes the material of the head and the handle uniform, improves the strength of the milling cutter, simultaneously improves the internal structure of the milling cutter, adopts different schemes for the segmented sections with high structural strength requirements and relatively low structural strength requirements, can comprehensively realize the automatic chip discharging effect, can improve the milling cutter cost to a certain extent, and can significantly improve the applicability of the milling cutter in the high-viscosity metal part machining environment through the automatic chip discharging mode.

Description

Technical Field

[0001] The present invention relates to the technical field of milling cutters, in particular to a milling cutter structure with a working section and a clamping section seamlessly welded, and specifically to a segmented milling cutter capable of automatic chip removal. Background Art

[0002] The milling cutter achieves grinding processing on the surface or inside of the workpiece by rotating at high speed driven by a motor. The milling cutter usually includes a head for chip processing and a shank for clamping. Many years ago, the milling cutter was usually made of tungsten steel as a whole. Later, in order to reduce costs, tungsten steel was usually used to make the head on the market, and then it was welded to the shank made of stainless iron. For example, a ball-head drum-shaped CNC milling cutter and its preparation process with publication number CN115722712A in the prior art include a milling cutter clamping handle, the bottom end of the milling cutter clamping handle is fixedly connected to the milling cutter upper cone, the bottom end of the milling cutter upper cone is fixedly connected to the milling cutter connecting block, and the bottom end of the milling cutter connecting block is fixedly connected to the milling cutter upper cone. A milling cutter cutting cone is fixedly connected, and a milling cutter lower ball head is fixedly connected to the bottom end of the milling cutter cutting cone, and cutting edges are provided on the sides of the milling cutter cutting cone and the milling cutter lower ball head; the invention is provided with a milling cutter upper cone, a milling cutter connecting block, a milling cutter cutting cone, and a milling cutter lower ball head. The milling cutter lower ball head is a ball head when it rotates, and the milling cutter upper cone, the milling cutter connecting block, and the milling cutter cutting cone are drum-shaped. When the drum-shaped milling cutter is used to mill the workpiece to be processed, it is convenient to mill the complex surface. When the milling cutter lower ball head is used as an entry point for cutting, it is more stable and the surface cleanliness is high. Therefore, the cutting work of complex structures can be carried out stably, and it is not easy to cause damage to the milling cutter itself, thereby extending its service life.

[0003] Another example is a roughing milling cutter with announcement number CN218694253U, which includes a cutter bar and a cutter head disposed at one end of the cutter bar. The cutter head is provided with a chip groove, and a plurality of blade mounting slots are provided at the bottom of the chip groove. The plurality of blade mounting slots are spliced ​​and arranged at the outer edge of the chip groove. The blade mounting slots are provided with blades, and the outer edges of the plurality of blades are spliced ​​together to form a continuous cutting edge. This roughing milling cutter divides the cutter head into several pieces, which are then spliced ​​and embedded in the chip groove. The blade can be made of any length and is not limited by the diameter of the composite sheet. The segmented cutter head and embedded structure can significantly reduce the situation in which the cutter head cracks caused by micro-deformation of the cutter body during processing, which ultimately leads to the scrapping of the entire tool.

[0004] The above-mentioned existing technologies all adopt a non-integrated structure and process design for the working section and the clamping section, which can avoid the problem of replacing the entire milling cutter due to damage to the cutter head and reducing the recycling value of the original damaged tool. However, the processing method of this type of tool often has a certain problem of unstable connection. At the same time, although the tool itself has a certain chip removal function, it is easy to leave metal debris in the cutting groove when cutting metal materials with high viscosity such as aluminum or stainless steel, which can easily cause scratches and wear on the surface of the workpiece being processed. Summary of the Invention

[0005] The purpose of the present invention is to provide a segmented milling cutter with automatic chip removal, so as to solve the problem that the processing method of similar tools in the prior art mentioned in the above background technology often has certain unstable connections. At the same time, although the tool itself has a certain chip removal function, when cutting metal materials with high viscosity such as aluminum or stainless steel, it is easy for metal debris to remain in the cutting groove, which in turn easily causes scratches and wear on the surface of the workpiece being processed.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a segmented milling cutter with automatic chip removal, comprising a cutter head and a shank seamlessly welded thereto, wherein the tail end of the shank is also connected to a mounting section, wherein the mounting section is used to be connected to the tool holder, and a chip removal hole is provided on the surface of the cutter head, and the chip removal hole is also connected to an air duct opened inside the cutter head and distributed vertically, wherein the top end of the air duct is connected to an air supply mechanism through a vertical opening passing through the shank, and the air supply mechanism generates airflow after the milling cutter stops and enables the chip removal hole to discharge chips from the tool groove.

[0007] Preferably, the chip removal hole is opened in the tool groove of the tool head.

[0008] Preferably, the air supply mechanism includes a space provided in the installation section, in which a core block is vertically and slidably provided, wherein the space above the core block is not completely sealed.

[0009] Preferably, the surface of the core block is connected to a driving mechanism, wherein the driving mechanism guides the core block to move vertically through a limiting ring set in the space, and at the same time, the driving mechanism generates a driving force by stopping the milling cutter and guides the core block to move and generate airflow.

[0010] Preferably, the driving mechanism includes a pendulum rod and a counterweight ball mounted on the top of the pendulum rod, wherein the outer edge of the pendulum rod is attached to the inner wall of the limiting ring, and the bottom end of the pendulum rod is elastically rotatably mounted on the surface of the core block.

[0011] Preferably, the driving mechanism includes a sliding column and a connecting member, wherein the sliding column is set on the side wall of the installation section for equal-angle sliding, and the connecting member is a connecting body connected to the sliding column and the core block at the head and tail respectively, and the core block is installed in the installation section for vertical elastic sliding.

[0012] Preferably, after the core block moves downward to a specified distance, the inner ends of the two sliding columns collide with each other and generate a vibration effect.

[0013] Preferably, a slider is slidably installed in the chip removal hole, wherein the outer end of the slider in the initial state is protruding from the inner wall of the knife groove.

[0014] Preferably, the inner end of the slider is connected to an elastic sheet, wherein the elastic sheet is fixedly attached to the inner wall of the airway.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the segmented milling cutter with automatic chip removal uses a combination of stainless iron and tungsten steel to form the overall structure of the milling cutter, which reduces costs while seamless welding can fuse the head and the shank together through high temperature, making the materials of the head and the shank uniform, improving the strength of the milling cutter, and improving the internal structure of the milling cutter. Different schemes are adopted for the segmented parts with high structural strength requirements and relatively low structural strength requirements, respectively, which can comprehensively achieve the automatic chip removal effect. It will increase the cost of the milling cutter to a certain extent, but will significantly improve the applicability of the milling cutter in a high-viscosity metal parts processing environment through automatic chip removal, as shown below.

[0016] Airflow chip cleaning: Through the structural design of the chip removal hole and the air duct, the air supply mechanism can supply air so that the air flow can pass through the chip removal hole and blow out from the chip removal hole, thereby cleaning the debris remaining in the tool groove part of the cutter head;

[0017] Furthermore, the structural design of the swing arm and the core block can utilize the centrifugal force of the milling cutter during high-speed rotation and the return movement of the core block after it stops, so that the core block can move downward and then upward under specified circumstances. Therefore, after the milling cutter stops, it can spontaneously generate air pressure inside to generate airflow for automatic chip removal. Compared with using air pump equipment in a complex working environment and considering the connection between the milling cutter and the air pump, it is more energy-saving and environmentally friendly.

[0018] As an alternative design solution, the structural design of the sliding column can, on the one hand, pull the core block upward to provide energy storage when the milling cutter rotates at high speed; on the other hand, it can approach each other and collide with each other after the milling cutter stops, generating a vibration effect, and then cooperate with airflow and vibration to achieve a comprehensive cleaning effect.

[0019] Slider ejection cleaning: Through the structural design of the slider and the elastic sheet, the pressure change inside the airway can pull the slider to move, and then after the milling cutter stops rotating, it extends out of the chip removal hole and produces a direct contact chip removal effect, which has a better effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0021] Figure 2 Schematic diagram of the airway distribution structure of the present invention;

[0022] Figure 3 Schematic diagram of the pendulum rod distribution structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the core block after moving up and down according to the first embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the overall structure of the second embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the internal structure of the installation section of the second embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the sleeve structure of the present invention;

[0027] Figure 8 This is a schematic diagram of the slider distribution structure of the present invention;

[0028] Figure 9 This is a schematic diagram of the elastic sheet distribution structure of the present invention.

[0029] In the figure: 1. Cutting head; 2. Cutting handle; 3. Chip removal hole; 4. Air duct; 5. Mounting section; 6. Core block; 7. Limiting ring; 8. Rocker arm; 9. Counterweight ball; 10. Sliding column; 11. Connecting body; 12. Sleeve; 13. Sliding block; 14. Elastic sheet. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figures 1-9 , the present invention provides the following technical solutions:

[0032] Embodiment 1: The solution disclosed in this embodiment is to solve the problems existing in the prior art, wherein the air supply mechanism can be an air supply structure arranged in the mounting section 5, or it can be an air pump or other equipment arranged in the machine tool and supplying air to the air duct 4 through the air flow channel in the mounting section 5, comprising a cutter head 1 and a tool handle 2 seamlessly welded thereto, wherein the tail end of the tool handle 2 is further connected to the mounting section 5, wherein the mounting section 5 is used to be connected to the tool holder, and the surface of the cutter head 1 is provided with a chip removal hole 3, which is simultaneously connected to the chip removal hole 3 opened inside the cutter head 1 and vertically distributed. The air duct 4 is connected, and the top of the air duct 4 is connected to the air supply mechanism through a vertical opening that passes through the tool handle 2. The air supply mechanism generates airflow after the milling cutter stops and enables the chip removal hole 3 to discharge the chips from the tool groove. The chip removal hole 3 is opened in the tool groove of the cutter head 1, so the airflow will be blown out from the chip removal hole 3. Since the output end of the chip removal hole 3 is located in the tool groove of the cutter head 1, the airflow will clean the metal debris in the tool groove accordingly after being blown out, thereby achieving the effect of automatic chip removal, thereby avoiding problems such as workpiece wear caused by such metal debris remaining in the tool groove.

[0033] In the solution disclosed in this embodiment, the air supply mechanism is arranged in the mounting section 5, so that the air flow driving effect can be generated by the rotation or stop of the mounting section 5, thereby avoiding the use of equipment such as air pumps in the harsh machining environment of the machine tool. Figure 3-Figure 4 As shown, the air supply mechanism includes a space set in the installation section 5, in which a core block 6 is vertically fitted and slidably arranged, wherein the space above the core block 6 is not completely sealed, and the surface of the core block 6 is connected to the driving mechanism, wherein the driving mechanism guides the core block 6 to move vertically through a limit ring 7 set in the space, and at the same time, the driving mechanism generates a driving force by stopping the milling cutter and guides the core block 6 to move and generate airflow, and the driving mechanism includes a rocker arm 8 and a counterweight ball 9 installed on the top of the rocker arm 8, wherein the outer edge of the rocker arm 8 is fitted on the inner wall of the limit ring 7, and the bottom end of the rocker arm 8 is elastically rotatably mounted on the surface of the core block 6. Under normal conditions, the core block 6 is located in the internal space of the installation section 5. In the lower section, the angle between the rocker arm 8 installed at the top and the core block 6 is relatively small, and the milling cutter will rotate at high speed when it is in working state. Therefore, under the centrifugal force of the counterweight ball 9 at the top of the rocker arm 8, the counterweight ball 9 will drive the rocker arm 8 to swing in the direction away from each other, so the core block 6 will move upward accordingly. After the milling cutter finishes working, it will stop rotating, and the stopping speed is relatively fast, so the rocker arm 8 will swing back quickly under the action of elasticity and drive the core block 6 to move downward quickly. At this time, the airflow under the core block 6 will be driven to move and produce a conveying effect, and then pass through the channel in the tool handle 2 into the air duct 4 and finally eject from the chip removal hole 3, thereby utilizing the airflow effect to achieve the effect of automatic chip removal.

[0034] Embodiment 2: Different from the above embodiment, this embodiment discloses another driving mechanism to make the airflow generated by the core block 6 more effective. Figure 6 As shown, the driving mechanism includes a slide post 10 and a connecting member, wherein the slide post 10 is slidingly arranged at equal angles on the side wall of the mounting section 5, wherein the connecting member is a connecting body 11 connected to the slide post 10 and the core block 6 at the head and tail respectively, and the core block 6 is elastically slidably installed in the mounting section 5 vertically. After the core block 6 moves downward to a specified distance, the inner ends of the two slide posts 10 will collide with each other and produce a vibration effect. In order to ensure sufficient displacement space, the driving mechanism is replaced with the slide post 10 shown in the figure. The slide post 10 slides horizontally and is installed on the side wall of the mounting section 5, so the moving space is larger, and the corresponding moving space of the core block 6 will also be larger. During high-speed rotation, the slide post 10 with a relatively large mass will move in the direction away from the axis of the milling cutter, and the core block 6 will move accordingly. The upper part slides elastically. When the milling cutter stops, the core block 6 elastically rebounds, which can produce an airflow conveying effect on the one hand, and on the other hand, it can make the slide column 10 quickly approach and collide to produce a milling cutter vibration effect, and then cooperate with the airflow cleaning to achieve a better chip removal effect. At the same time, the connector 11 itself is a flexible material and therefore will not cause additional restrictions on the core block 6. Therefore, the core block 6 will move back and forth within a certain distance and frequency due to the reciprocating rebound effect of elastic parts such as springs, thereby being able to produce a single drive and multiple airflow effects. At the same time, the slide column 10 can also be slidably installed in the sleeve 12, and the sleeve 12 is fixedly connected to the mounting section 5, thereby indirectly improving the overall structural strength of the mounting section 5 and making the movement of the slide column 10 more stable.

[0035] The solution disclosed in this embodiment is relatively expensive and has certain processing difficulties, but it can achieve a relatively better chip removal effect. Figure 8-Figure 9 As shown, a slider 13 is slidably installed in the chip removal hole 3, wherein the outer end of the slider 13 in the initial state is set to protrude from the inner wall of the tool groove, and the inner end of the slider 13 is connected to the elastic sheet 14, wherein the elastic sheet 14 is fixedly fitted to the inner wall of the air duct 4. When the milling cutter rotates at high speed, the core block 6 will move up, so that the air duct 4 is in a negative pressure state, thereby guiding the elastic sheet 14 to deform inwardly, and guiding the slider 13 to move inward, ensuring that the outer end of the slider 13 does not protrude from the inner wall of the tool groove and thus ensuring that the milling work is not affected. After the milling cutter stops, the core block 6 moves downward, so the air pressure effect will cause the elastic sheet 14 to pull the slider 13 toward the outside in a convex state, so that the debris in the tool groove will be ejected accordingly, which can achieve a better chip removal effect compared to airflow cleaning.

[0036] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A segmented milling cutter capable of automatic chip removal, comprising a cutter head (1) and a shank (2) seamlessly welded thereto, wherein the tail end of the shank (2) is further connected to a mounting section (5), wherein the mounting section (5) is used to connect to a cutter seat, and is characterized in that: The surface of the cutter head (1) is provided with a chip removal hole (3), and the chip removal hole (3) is simultaneously connected to an air channel (4) provided inside the cutter head (1) and distributed vertically, wherein the top end of the air channel (4) is connected to an air supply mechanism via a vertical opening penetrating through the cutter handle (2), and the air supply mechanism generates airflow after the milling cutter stops rotating, and enables the chip removal hole (3) to discharge chips from the cutter groove; The air supply mechanism comprises a space provided in the installation section (5), in which a core block (6) is vertically fitted and slidably provided, wherein the space above the core block (6) is not completely sealed; The surface of the core block (6) is connected to a driving mechanism, wherein the driving mechanism guides the core block (6) to move vertically through a limiting ring (7) arranged in the space, and at the same time, the driving mechanism generates a driving force by stopping the milling cutter and guides the core block (6) to move and generate airflow; The driving mechanism comprises a sliding column (10), a connecting member or a rocking rod (8), and a weighted ball (9) mounted on the top of the rocking rod (8), wherein the outer edge of the rocking rod (8) is attached to the inner wall of the limiting ring (7), and the bottom end of the rocking rod (8) is elastically rotatably mounted on the surface of the core block (6); The sliding column (10) is equiangularly slidably arranged on the side wall of the installation section (5), and the connecting member is a connecting body (11) connected to the sliding column (10) and the core block (6) at the head and tail, respectively. At the same time, the core block (6) is vertically elastically slidably installed in the installation section (5).

2. A segmented milling cutter with automatic chip removal according to claim 1, characterized in that: The chip removal hole (3) is provided in the cutter groove of the cutter head (1).

3. The segmented milling cutter with automatic chip removal according to claim 1, characterized in that: After the core block (6) moves downward to a specified distance, the inner ends of the two sliding columns (10) collide with each other and generate a vibration effect.

4. The segmented milling cutter with automatic chip removal according to claim 1, characterized in that: A slider (13) is slidably mounted in the chip removal hole (3), wherein the outer end of the slider (13) in the initial state is arranged to protrude from the inner wall of the knife groove.

5. The segmented milling cutter with automatic chip removal according to claim 4, characterized in that: The inner end of the slider (13) is connected to the elastic sheet (14), wherein the elastic sheet (14) is fixedly attached to the inner wall of the airway (4).

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