Sectional type milling cutter capable of automatically discharging chips

Abstract

The invention discloses a sectional milling cutter capable of automatically discharging chips, which comprises a cutter head and a cutter handle seamlessly welded with the cutter head, the tail end of the cutter handle is also connected with a mounting section, the mounting section is used for being connected with a cutter holder, the surface of the cutter head is provided with a chip discharging hole, and the chip discharging hole is communicated with the cutter head. And the air supply mechanism generates air flow after the milling cutter stops rotating and enables the chip removal holes to discharge chips out of the cutter groove. According to the sectional type milling cutter capable of automatically discharging the chips, the head part and the handle part can be fused together through seamless welding at high temperature, so that the head part and the handle part are uniform in material, the strength of the milling cutter is improved, meanwhile, the internal structure of the milling cutter is improved, and different schemes are adopted for sectional parts with high structural strength requirements and relatively low structural strength requirements; the automatic chip removal effect can be comprehensively achieved, the cost of the milling cutter can be improved to a certain degree, and the applicability of the milling cutter in the high-viscosity metal part machining environment can be remarkably improved in an automatic chip removal mode.

Description

Technical Field

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

[0002] A milling cutter realizes grinding treatment on the surface or inside of a workpiece through its high-speed rotation driven by a motor. A milling cutter usually includes a head for chip processing and a shank for clamping. Many years ago, milling cutters were usually made entirely of tungsten steel. Later, in order to reduce costs, tungsten steel is usually only used to manufacture the head on the market, and then welded to a shank made of martensitic stainless iron. For example, a ball-end drum-shaped CNC milling cutter and its preparation process with the publication number CN115722712A in the prior art includes a milling cutter clamping shank, the bottom end of the milling cutter clamping shank is fixedly connected with an upper milling cutter cone, the bottom end of the upper milling cutter cone is fixedly connected with a milling cutter connecting block, the bottom end of the milling cutter connecting block is fixedly connected with a milling cutter cutting cone, the bottom end of the milling cutter cutting cone is fixedly connected with a lower milling cutter ball head, and a cutting edge is arranged on the side surface of the milling cutter cutting cone and the lower milling cutter ball head; by providing the upper milling cutter cone, the milling cutter connecting block, the milling cutter cutting cone, and the lower milling cutter ball head, the lower milling cutter ball head is a ball head when rotating, and the upper milling cutter cone, the milling cutter connecting block, and the milling cutter cutting cone are drum-shaped. When the drum-shaped milling cutter is used for milling a workpiece to be machined, it is convenient to perform milling on complex surfaces. When the lower milling cutter ball head is used as the cutting point for cutting in, it is more stable and has a high surface cleanliness. Therefore, it can stably perform cutting work on complex structures, is not easily damaged to the milling cutter itself, and prolongs its service life.

[0003] Another example is a roughing milling cutter with the publication number CN218694253U, which includes a tool shank and a tool head arranged at one end of the tool shank. Chip removal grooves are formed in the tool head, and a plurality of blade mounting grooves are formed at the bottom of the chip removal grooves. The plurality of blade mounting grooves are spliced and arranged on the outer edge of the chip removal grooves. Blades are arranged on the blade mounting grooves, and the outer edges of the plurality of blades are spliced to form a continuous cutting edge. This roughing milling cutter separates the tool head into several parts and then inlays them in the chip removal grooves after splicing. The cutting edge can be of any length and is not limited by the diameter size of the composite sheet. Moreover, the segmented tool head and the inlay structure can greatly reduce the situation that the tool head cracks due to the micro-deformation of the tool body during processing, ultimately resulting in the scrapping of the entire tool.

[0004] In the above-mentioned prior art, a structure and process design in which the working section and the clamping section are not integrally formed are adopted, which can avoid the problem of replacing the entire milling cutter due to tool head damage and reduce the recycling value of the original damaged tool. However, the processing method of this type of tool often has a problem of unstable connection at the joint. At the same time, although the tool itself has a certain chip removal function, when cutting metal materials with relatively high viscosity such as aluminum or stainless steel, it is easy to leave metal chips in the cutting groove, which is likely to cause scratching and wear on the surface of the workpiece to be machined. Summary of the Invention

[0005] The purpose of the present invention is to provide a segmented milling cutter with automatic chip removal to solve the problem that the processing method of the same type of tool in the prior art often has a problem of unstable connection at the joint. At the same time, although the tool itself has a certain chip removal function, when cutting metal materials with relatively high viscosity such as aluminum or stainless steel, it is easy to leave metal chips in the cutting groove, which is likely to cause scratching and wear on the surface of the workpiece to be machined.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A segmented milling cutter with automatic chip removal includes a tool head and a tool handle seamlessly welded thereto. The tail end of the tool handle is also connected with an installation section, and the installation section is used to connect with the tool holder. Chip removal holes are formed on the surface of the tool head, and the chip removal holes are simultaneously communicated with air channels vertically distributed inside the tool head. The top end of the air channel is connected with a gas supply mechanism through a vertical opening penetrating through the tool handle. The gas supply mechanism generates an air flow after the milling cutter stops rotating and enables the chip removal holes to discharge chips from the tool groove.

[0007] Preferably, the chip removal holes are formed in the tool grooves of the tool head.

[0008] Preferably, the gas supply mechanism includes a space arranged in the installation section, and a core block is vertically and slidably arranged in the space in a fitting manner. The space above the core block is not completely sealed.

[0009] Preferably, the surface of the core block is connected with a driving mechanism. The driving mechanism guides the vertical movement of the core block through a limiting ring arranged in the space. At the same time, the driving mechanism generates a driving force through the stop of the milling cutter and guides the movement of the core block to generate an air flow.

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

[0011] Preferably, the driving mechanism includes a sliding column and a connecting member. The sliding column is slidably arranged on the side wall of the installation section at equal angles. The connecting member is a connecting body with its head and tail connected to the sliding column and the core block respectively. Meanwhile, the core block is vertically and elastically slidably installed in the installation section.

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

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

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

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: For the segmented milling cutter capable of automatically discharging chips, the overall structure of the milling cutter is formed by combining martensitic stainless iron and tungsten steel. While reducing costs, 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. At the same time, the internal structure of the milling cutter is improved. Different solutions are adopted for the segmented parts with high structural strength requirements and relatively low structural strength requirements respectively, which can comprehensively achieve the effect of automatic chip removal. Although it will increase the cost of the milling cutter to a certain extent, it can significantly improve the applicability of the milling cutter in the processing environment of high-viscosity metal parts by automatically discharging chips, as shown below.

[0016] Airflow chip cleaning: Through the structural design of the chip removal hole and the air duct, the airflow can pass through the air duct and be blown out from the chip removal hole by the air supply of the air supply mechanism, so as to clean the chips remaining in the tool groove part of the tool head by airflow. Furthermore, due to the structural design of the swing rod and the core block, the centrifugal force during the high-speed rotation of the milling cutter and the return movement of the core block after the milling cutter stops rotating can be utilized, so that the core block can move downward and then upward under specified conditions. Therefore, after the milling cutter stops rotating, an air pressure effect can be spontaneously generated inside it, and then an airflow is generated to achieve automatic chip removal. Compared with using an air pump device 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. As an alternative design, on the one hand, the structural design of the sliding column can provide energy storage by pulling the core block upward during the high-speed rotation of the milling cutter, and on the other hand, it can move closer to each other and collide to generate a vibration effect after the milling cutter stops rotating, thereby cooperating with the airflow and vibration to achieve the comprehensive cleaning effect.

[0017] Ejection cleaning of the slider: Through the structural design of the slider and the elastic sheet, the change in the internal pressure of the air duct can pull the slider to move, and then the slider extends out of the chip removal hole after the milling cutter stops rotating and produces a chip removal effect of direct contact, with better use effect. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present invention; Figure 2 It is a schematic diagram of the airway distribution structure of the present invention; Figure 3 It is a schematic diagram of the distribution structure of the swing rod of the present invention; Figure 4 It is a schematic diagram of the structure after the core block of the first embodiment of the present invention moves up and down; Figure 5 It is a schematic diagram of the overall structure of the second embodiment of the present invention; Figure 6 It is a schematic diagram of the internal structure of the installation section of the second embodiment of the present invention; Figure 7 It is a schematic diagram of the sleeve structure of the present invention; Figure 8 It is a schematic diagram of the distribution structure of the slider of the present invention; Figure 9 It is a schematic diagram of the distribution structure of the elastic sheet of the present invention.

[0019] In the figure: 1. Tool bit; 2. Tool handle; 3. Chip removal hole; 4. Airway; 5. Installation section; 6. Core block; 7. Limiting ring; 8. Swing rod; 9. Counterweight ball; 10. Slide post; 11. Connecting body; 12. Sleeve; 13. Slider; 14. Elastic sheet. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-9 , the present invention provides the following technical solutions: Embodiment 1: The solution disclosed in this embodiment is to solve the problems existing in the prior art. The air supply mechanism can be an air supply structure provided in the installation section 5, or an air pump or other equipment provided in the machine tool and supply air to the air duct 4 through the air flow channel in the installation section 5. It includes a tool tip 1 and a tool handle 2 seamlessly welded thereto. The tail end of the tool handle 2 is also connected with an installation section 5, and the installation section 5 is used to connect with the tool holder. Chip removal holes 3 are formed on the surface of the tool tip 1, and the chip removal holes 3 are simultaneously communicated with an air duct 4 opened inside the tool tip 1 and vertically distributed. The top end of the air duct 4 is connected with the air supply mechanism through a vertical opening penetrating through the tool handle 2. The air supply mechanism generates air flow after the milling cutter stops rotating and enables the chip removal holes 3 to discharge debris from the tool groove. The chip removal holes 3 are formed in the tool groove of the tool tip 1, so the air flow will blow out from the chip removal holes 3. Since the output end of the chip removal holes 3 is located in the tool groove of the tool tip 1, the air flow will clean the metal debris in the tool groove accordingly, thus achieving the effect of automatic chip removal, and further avoiding problems such as workpiece wear caused by the residue of such metal debris in the tool groove.

[0022] In the solution disclosed in this embodiment, the air supply mechanism is arranged in the installation section 5, so as to be able to generate an air flow driving effect through the rotation or stop of the installation section 5, thereby avoiding the use of equipment such as air pumps in the harsh machining environment of the machine tool. Specifically, as Figures 3-4 shown, the air supply mechanism includes a space provided in the installation section 5. A core block 6 is vertically and slidably arranged in a fitting manner in this space. The space above the core block 6 is not completely sealed. The surface of the core block 6 is connected with a driving mechanism. The driving mechanism guides the vertical movement of the core block 6 through a limiting ring 7 arranged in the space. At the same time, the driving mechanism generates a driving force through the stop of the milling cutter and guides the movement of the core block 6 to generate an air flow. The driving mechanism includes a swing rod 8 and a counterweight ball 9 installed at the top end of the swing rod 8. The outer edge of the swing rod 8 is attached to the inner wall of the limiting ring 7, and the bottom end of the swing rod 8 is elastically and rotatably installed on the surface of the core block 6. In the normal state, the core block 6 is located at a position slightly lower in the internal space of the installation section 5, and the included angle between the swing rod 8 installed at its top end and the core block 6 is relatively small. When the milling cutter is in the working state, it will rotate at a high speed. Therefore, under the action of the centrifugal force of the counterweight ball 9 at the top end of the swing rod 8, the counterweight ball 9 will drive the swing rod 8 to swing in a mutually separated direction. Therefore, 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 swing rod 8 will quickly swing back under the elastic action and drive the core block 6 to quickly move downward. At this time, the air flow below the core block 6 will be driven to move and generate a conveying effect, then pass through the channel in the tool handle 2 and enter the air duct 4 and finally spray out from the chip removal holes 3, thereby achieving the effect of automatic chip removal by using the air flow effect.

[0023] Embodiment 2: Different from the above embodiment, another driving mechanism is disclosed in this embodiment, which makes the air flow promotion effect generated by the core block 6 better. For example Figure 6 As shown, the driving mechanism includes a sliding column 10 and a connecting member. The sliding column 10 is slidably arranged on the side wall of the installation section 5 at equal angles. The connecting member is a connecting body 11 whose head and tail are respectively connected to the sliding column 10 and the core block 6. At the same time, the core block 6 is vertically and elastically slidably installed in the installation section 5. After the core block 6 moves downward to a specified distance, the inner ends of the two sliding columns 10 will collide with each other and generate a vibration effect. To ensure sufficient displacement space, the driving mechanism is replaced with the sliding column 10 shown in the figure. The sliding column 10 slides horizontally and penetrates through the side wall of the installation section 5. Therefore, the moving space is larger, and correspondingly, the moving space of the core block 6 is also larger. During high-speed rotation, the relatively heavy sliding column 10 will move away from the axis of the milling cutter, and the core block 6 will slide upward elastically accordingly. When the milling cutter stops rotating, the core block 6 elastically rebounds. On the one hand, it can generate an air flow conveying effect, and on the other hand, it can make the sliding column 10 quickly approach and collide to generate a milling cutter vibration effect, which can cooperate with the air flow cleaning to achieve a better chip removal effect. At the same time, the connecting body 11 itself is made of a flexible material, so it will not cause additional restrictions on the core block 6. Therefore, the core block 6 will reciprocate within a certain distance and frequency due to the reciprocating rebound effect of elastic members such as springs, so as to be able to generate a single drive and generate air flow multiple times. At the same time, the sliding column 10 can also be slidably installed in the sleeve 12, and the sleeve 12 is fixedly connected to the installation section 5, thereby indirectly improving the overall structural strength of the installation section 5 and making the movement of the sliding column 10 more stable.

[0024] The solution disclosed in this embodiment has a relatively high cost and certain processing difficulty, but it can achieve a relatively better chip removal effect. Specifically, as Figures 8-9 shown, a slider 13 is slidably installed in the chip removal hole 3. The outer end of the slider 13 protrudes from the inner wall of the cutter groove in the initial state. The inner end of the slider 13 is connected to an elastic piece 14, and the elastic piece 14 is fixedly attached to the inner wall of the air duct 4. When the milling cutter rotates at high speed, the core block 6 will move upward, so that the air duct 4 is in a negative pressure state, which will guide the elastic piece 14 to deform inwardly and guide the slider 13 to move inward, ensuring that the outer end of the slider 13 does not protrude from the inner wall of the cutter groove and thus ensuring that the milling work is not affected. After the milling cutter stops rotating, the core block 6 moves downward. Therefore, the air pressure effect will cause the elastic piece 14 to pull the slider 13 outward in a convex state, so the chips in the cutter groove will be ejected accordingly, achieving a better chip removal effect compared with air flow cleaning.

[0025] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A segmented milling cutter capable of automatically discharging chips, comprising a cutter head (1) and a cutter handle (2) seamlessly welded thereto, wherein an installation section (5) is further connected to the tail end of the cutter handle (2), and the installation section (5) is used for connecting to a cutter holder, and is characterized in that: The surface of the cutter head (1) is provided with chip removal holes (3), and the chip removal holes (3) are simultaneously communicated with an air duct (4) which is arranged inside the cutter head (1) and vertically distributed. The top end of the air duct (4) is connected to a gas supply mechanism through a vertical opening penetrating through the tool handle (2). The gas supply mechanism generates an air flow after the milling cutter stops rotating, and enables the chip removal holes (3) to discharge chips from the cutter groove.

2. The segmented milling cutter capable of automatically discharging chips according to claim 1, wherein: The chip removal holes (3) are arranged in the cutter groove of the cutter head (1).

3. The segmented milling cutter capable of automatically discharging chips according to claim 1 or 2, characterized in that: The gas supply mechanism includes a space arranged in the installation section (5), and a core block (6) is vertically and slidably arranged in the space in a fitting manner. The space above the core block (6) is not completely sealed.

4. The segmented milling cutter capable of automatically discharging chips according to claim 3, characterized in that: The surface of the core block (6) is connected to a driving mechanism. The driving mechanism guides the vertical movement of the core block (6) through a limiting ring (7) arranged in the space. At the same time, the driving mechanism generates a driving force through the stop rotation of the milling cutter and guides the movement of the core block (6) to generate an air flow.

5. The segmented milling cutter capable of automatically discharging chips according to claim 4, wherein: The driving mechanism includes a swing rod (8) and a counterweight ball (9) installed at the top end of the swing rod (8). The outer edge of the swing rod (8) is attached to the inner wall of the limiting ring (7), and the bottom end of the swing rod (8) is elastically and rotatably installed on the surface of the core block (6).

6. The sectional milling cutter capable of automatically discharging chips according to claim 4, characterized in that: The driving mechanism includes a sliding column (10) and a connecting member. The sliding column (10) is slidably arranged on the side wall of the installation section (5) at equal angles. The connecting member is a connecting body (11) whose head and tail are respectively connected to the sliding column (10) and the core block (6). At the same time, the core block (6) is vertically and elastically slidably installed in the installation section (5).

7. A segmented milling cutter capable of automatically discharging chips according to claim 6, characterized in that: After the core block (6) moves downward to a specified distance, the inner ends of the two sliding columns (10) will collide with each other and produce a vibration effect.

8. A segmented milling cutter capable of automatically discharging chips according to claim 1, wherein: A slider (13) is slidably installed in the chip removal hole (3). The outer end of the slider (13) protrudes from the inner wall of the cutter groove in the initial state.

9. The segmented milling cutter capable of automatically discharging chips according to claim 8, characterized in that: The inner end of the slider (13) is connected to an elastic piece (14), and the elastic piece (14) is fixedly attached to the inner wall of the air duct (4).

Images