An automatic chip-breaking disc cutter for ultrasonic cutting of honeycomb core

Abstract

The present invention provides an automatic chip-breaking disc cutter for ultrasonically cutting honeycomb cores. The present invention comprises a cutter bar, a chip slitting blade, a chip guide ring, a material slitting blade and a locking device. The input end of the cutter bar is connected to an ultrasonic vibration system. The chip slitting blade, the chip guide ring and the material slitting blade are connected to the cutter bar from top to bottom. The chip slitting blade, the chip guide ring and the material slitting blade are fixed to the cutter bar by the locking device. There is a preset distance between the bottom end of the chip slitting blade, the top end of the material slitting blade and the chip guide ring. The chip slitting blade and the material slitting blade are both provided with a preset inclination angle. The maximum diameter of the chip guide ring is smaller than the maximum diameter of the chip slitting blade and also smaller than the minimum diameter of the material slitting blade, so that the chips in the cutting process enter the chip slitting blade through the chip guide ring. The chip guide ring of the tool realizes the guidance of the chips, and the chip slitting blade realizes the real-time cutting of the chips, thereby avoiding the winding of the chips of the honeycomb core and ensuring the processing quality of the honeycomb core.

Description

Technical Field

[0001] The invention relates to the field of ultrasonic cutting tools, in particular to an automatic chip-breaking disc cutter for ultrasonically cutting honeycomb cores. Background Art

[0002] Ultrasonic cutting technology is an advanced processing method based on traditional cutting technology, which uses composite ultrasonic vibration to achieve material removal. In recent years, it has been used in the processing of honeycomb materials in the aviation and aerospace fields. It can significantly reduce cutting forces and significantly improve processing quality and efficiency compared to traditional high-speed milling.

[0003] Ultrasonic cutting with a disc knife is one of the main methods for realizing honeycomb surface processing. During the processing, the disc knife rotates around the axis and assists with ultrasonic vibration to achieve the removal of flaky chips under the cooperation of feed motion. However, when ultrasonically cutting large-sized honeycomb cores, the large-area chips generated will accompany the entire processing process. Only when the disc knife completely cuts the honeycomb core material will it be separated from the material surface. During the cutting process, large-area chips will be entangled on the tool or the tool handle, causing processing damage such as material tearing. In order to ensure the processing quality, it is often necessary to manually cut off large-area chips in time, which increases the safety risks of operation and greatly reduces the processing efficiency. Therefore, the timely and automatic chip breaking of honeycomb core chips is of great significance to ensure the smooth implementation of ultrasonic cutting and the processing quality of components. Summary of the invention

[0004] In order to solve the problem that the ultrasonic cutting disc knife of the current structure cannot achieve real-time chip breaking, which affects the processing quality and processing efficiency, the present invention designs an automatic chip breaking disc knife for ultrasonic cutting honeycomb core, which guides the chips by setting a chip guide ring and uses a chip cutting blade to automatically cut off the chips, which can effectively avoid problems such as chip entanglement. The use of the automatic chip breaking disc knife of the present invention to process the honeycomb core has the advantages of good processing quality, high processing efficiency, simple tool use, and convenient installation. The technical means adopted by the present invention are as follows:

[0005] An automatic chip breaking disc knife for ultrasonically cutting honeycomb cores comprises a tool rod, a chip cutting blade, a chip guide ring, a material cutting blade and a locking device, wherein the input end of the tool rod is connected to an ultrasonic vibration system, and the chip cutting blade, chip guide ring and material cutting blade are connected to the tool rod from top to bottom, and the chip cutting blade, chip guide ring and material cutting blade are fixed to the tool rod by the locking device, and there is a preset distance between the bottom end of the chip cutting blade, the top end of the material cutting blade and the chip guide ring, and the chip cutting blade and the material cutting blade are both provided with a preset inclination angle, and the maximum diameter of the chip guide ring is smaller than the maximum diameter of the chip cutting blade and also smaller than the minimum diameter of the material cutting blade, so that the chips in the cutting process enter the chip cutting blade through the chip guide ring.

[0006] Furthermore, the locking device comprises a chip cutting blade locking nut which is screwed onto the cutter rod and pressed onto the chip cutting blade.

[0007] Furthermore, the tool wedge angles of the chip cutting blade and the material cutting blade are less than 45 degrees.

[0008] Furthermore, the chip cutting blade and the material cutting blade are located at a position where the ultrasonic amplitude is maximum, and the chip guide ring is located at a position where the ultrasonic amplitude is minimum.

[0009] Furthermore, the lower surface blade diameter of the chip splitting blade is larger than the upper surface diameter of the chip guide ring matched therewith, and the radius difference between the two is larger than the maximum cutting depth of the tool, ensuring that the chips are smoothly transferred to the chip splitting blade through the chip guide ring and cut off.

[0010] As one of the optional technical means, the tool bar is in the form of a stepped shaft, the size of the stepped shaft is the largest in the middle section, and the size decreases towards the two ends. Specifically, the middle section of the tool bar is provided with a protrusion protruding from the tool bar body. The upper surface of the material slitting blade cooperates with the lower surface of the protrusion in the middle section of the tool bar, the lower surface of the chip guide ring cooperates with the upper surface of the protrusion in the middle section of the tool bar, the lower surface of the chip slitting blade cooperates with the chip guide ring boss, and the locking device also includes a connecting screw, through which the material slitting blade is screwed to the threaded hole opened at the bottom of the tool bar.

[0011] As another optional technical means, a base is provided at the bottom end of the tool rod, so that the lower surface of the material cutting blade can be installed on the base, the upper surface of the material cutting blade cooperates with the lower surface of the chip guide ring, and the upper surface of the chip guide ring is provided with a boss, and the boss on the upper surface of the chip guide ring cooperates with the chip cutting blade.

[0012] Furthermore, the chip guide ring is located between the chip slitting blade and the material slitting blade, and is coaxially arranged in a mechanical series relationship. The chip guide ring is in the form of a cylinder or a frustum, which guides the chips toward the slitting blade and ensures that the chips are cut off by the chip slitting blade in time.

[0013] Furthermore, the chip cutting blade locking nut is a thin part, which is convenient for the tool structure to resonate and thus achieve good ultrasonic vibration.

[0014] Furthermore, the rotation direction of the thread of the lower section of the rear half of the tool rod is opposite to the rotation direction of the internal thread of the tool rod, thereby preventing the tool from loosening during rotation.

[0015] Furthermore, an inner hole is provided on the connecting screw for fixing a wrench to achieve pre-tightening of the connecting screw.

[0016] The working principle of the present invention is as follows:

[0017] The tool vibrates ultrasonically along the axis and rotates around the axis. With the cooperation of the feed motion, the material slitting blade cuts sheet or strip chips on the workpiece material. As the tool continues to feed, the chip length gradually increases and warps, then rises along the chip guide ring and leaves the machined surface to contact the chip slitting blade, realizing automatic chip cutting.

[0018] The beneficial effects of the present invention are:

[0019] The chip guiding ring of the tool is provided to guide the chips, and the chip cutting blade is used to realize automatic chip breaking and cutting, thereby avoiding the entanglement of the honeycomb core chips on the tool or the tool handle, and improving the processing quality of the honeycomb core. The use of the tool of the present invention can avoid the tedious operation of manually cutting off the chips, and improves the processing quality and processing efficiency of the honeycomb core material. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a schematic diagram of the automatic chip-breaking disc cutter processing for ultrasonically cutting honeycomb cores of the present invention.

[0022] Figure 2 It is a cross-sectional view of Example 1 of an automatic chip-breaking disc cutter for ultrasonically cutting a honeycomb core.

[0023] Figure 3 It is a cross-sectional view of Example 2 of an automatic chip-breaking disc cutter for ultrasonically cutting a honeycomb core.

[0024] In the figure: 1. threaded section of the upper part of the rear half of the tool rod; 2. slot of the tool rod; 3. tool rod; 4. locking nut of the chip slitting blade; 5. chip slitting blade; 6. chip guide ring; 7. material slitting blade; 8. connecting screw; 9. inner hole of the connecting screw; 10. threaded hole inside the tool rod; 11. upper surface of the slitting blade; 12. lower surface of the middle section of the tool rod; 13. lower surface of the chip guide ring; 14. upper surface of the middle section of the tool rod; 15. lower surface of the chip slitting blade; 16. chip guide ring boss; 17. lower section of the rear half of the tool rod; 18. inner hole of the material slitting blade; 19. inner hole of the chip guide ring; 20. lower surface of the material slitting blade; 21. upper surface of the lower section of the tool rod; 22. middle section of the tool rod. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0026] like Figure 1 As shown, an embodiment of the present invention discloses an automatic chip breaking disc knife for ultrasonic cutting of honeycomb core, comprising a tool rod, a chip cutting blade, a chip guide ring, a material cutting blade and a locking device, wherein the input end of the tool rod is connected to the ultrasonic vibration system, the chip cutting blade, the chip guide ring and the material cutting blade are connected to the tool rod from top to bottom, and the chip cutting blade, the chip guide ring and the material cutting blade are fixed to the tool rod by the locking device, and there is a preset distance between the bottom end of the chip cutting blade, the top end of the material cutting blade and the chip guide ring, the chip cutting blade and the material cutting blade are both provided with a preset inclination angle, and the maximum diameter of the chip guide ring is smaller than the maximum diameter of the chip cutting blade and also smaller than the minimum diameter of the material cutting blade, so that the chips in the cutting process enter the chip cutting blade through the chip guide ring.

[0027] The locking device comprises a chip cutting blade locking nut which is screwed onto the cutter bar and pressed onto the chip cutting blade.

[0028] The tool wedge angles of the chip cutting blade and the material cutting blade are less than 45 degrees.

[0029] The chip cutting blade and the material cutting blade are located at the position where the ultrasonic amplitude is maximum, and the chip guide ring is located at the position where the ultrasonic amplitude is minimum.

[0030] The lower surface blade diameter of the chip splitting blade is larger than the upper surface diameter of the chip guide ring matched therewith, and the radius difference between the two is larger than the maximum cutting depth of the tool, ensuring that the chips can be smoothly transferred to the chip splitting blade.

[0031] The tool bar is in the form of a stepped shaft, the size of the stepped shaft is the largest in the middle section, and the size decreases towards the two ends. Specifically, the middle section of the tool bar is provided with a protrusion protruding from the tool bar body. The upper surface of the material slitting blade cooperates with the lower surface of the protrusion in the middle section of the tool bar, the lower surface of the chip guide ring cooperates with the upper surface of the protrusion in the middle section of the tool bar, the lower surface of the chip slitting blade cooperates with the chip guide ring boss, and the locking device also includes a connecting screw, through which the material slitting blade is screwed to the threaded hole opened at the bottom of the tool bar.

[0032] A base is provided at the bottom end of the tool rod, so that the lower surface of the material cutting blade can be installed on the base, the upper surface of the material cutting blade cooperates with the lower surface of the chip guide ring, the upper surface of the chip guide ring is provided with a boss, and the boss on the upper surface of the chip guide ring cooperates with the chip cutting blade.

[0033] The chip guide ring is located between the chip slitting blade and the material slitting blade, and is coaxially arranged in a mechanical series relationship. The chip guide ring is in the form of a cylinder or a frustum, which guides the chips toward the slitting blade to ensure that the chips are cut off by the chip slitting blade in time.

[0034] The chip cutting blade locking nut is a thin part, which is convenient for the tool structure to resonate and thus achieve good ultrasonic vibration.

[0035] The thread rotation direction of the lower section of the rear half of the tool rod is opposite to the thread rotation direction of the inner thread of the tool rod, so as to prevent the tool from loosening during rotation.

[0036] An inner hole is provided on the connecting screw, so as to facilitate the use of a wrench to pre-tighten the connecting screw.

[0037] Example 1

[0038] The automatic chip-breaking disc cutter for ultrasonically cutting honeycomb core in this embodiment includes six parts: a tool bar 3, a chip cutting blade 5, a chip cutting blade locking nut 4, a chip guide ring 6, a material cutting blade 7, and a connecting screw 8. The upper threaded section 1 of the rear half of the tool bar is connected to the ultrasonic vibration system. During the installation process, the material cutting blade 7 is first installed from the lower half of the tool bar 3 until the upper surface 11 of the material cutting blade contacts the lower surface 12 of the middle section of the tool bar, and a small gap is formed between the two. Then, a wrench is clamped on the slot 2 of the tool bar, and another wrench is inserted into the two inner holes 9 of the connecting screw, and the connecting screw 8 is screwed into the internal threaded hole 10 of the tool bar and tightened to fix the material cutting blade 7 axially and circumferentially. The chip guide ring 6 and the chip slitting blade 5 are sequentially mounted on the tool bar 3 from top to bottom until the lower surface 13 of the chip guide ring contacts the upper surface 14 of the middle section of the tool bar, and the lower surface 15 of the chip slitting blade contacts the chip guide ring boss 16, and a small gap is formed between the chip guide ring 6 and the chip slitting blade 5 and the tool bar 3. Finally, the chip slitting blade locking nut 4 is screwed into the lower section 17 of the rear half of the tool bar, and the tool bar is fixed by clamping the slot 2 of the tool bar with a wrench, and then the chip slitting blade locking nut 4 is tightened with another wrench to fix the chip guide ring 6 and the chip slitting blade 5 axially and circumferentially, completing the installation of the entire tool parts.

[0039] In order to realize ultrasonic vibration of the tool during processing, thin parts are used when the material cutting blade 7 and the chip cutting blade 5 and the chip cutting blade locking nut 4 are selected, so that resonance is generated between the various parts of the tool and good ultrasonic vibration is obtained while ensuring strength.

[0040] The maximum diameter of the chip guide ring 6 is slightly smaller than the maximum diameter of the chip slitting blade 5 and the minimum diameter of the material slitting blade 7, and the chip guide ring 6 is in the form of a frustum, ensuring that the chips can rise along the chip guide ring 6 and be smoothly guided to the chip slitting blade 5.

[0041] The generatrix of the outer surface of the middle and lower part of the chip guide ring 6 is a curve, and the curvature of the generatrix is ​​consistent with the curvature of the chip bending, so that the chips are smoothly guided to the slitting blade 5.

[0042] The tool wedge angles of the chip cutting blade 5 and the material cutting blade 7 are less than 45° to ensure the sharpness of the blades so that the honeycomb material can be cut smoothly.

[0043] The radius difference between the lower surface 15 of the chip splitting blade and the chip guide ring 6 is greater than the maximum cutting depth, ensuring that the chips are smoothly cut by the cutting edge when being guided to the chip splitting blade 5 .

[0044] Example 2

[0045] Figure 3 The automatic chip-breaking disc cutter for ultrasonically cutting honeycomb core in this embodiment has the same overall shape and effect as the tool, but the structure of the tool bar and the connection method between the parts have been adjusted. The size of the tool bar 3 decreases from bottom to top, increasing the diameter of the inner hole 18 of the material slitting blade and the inner hole 19 of the chip guide ring. During the installation process, the tool bar 3, the material slitting blade 7, the chip guide ring 6, the chip slitting blade 5, and the chip slitting blade locking nut 4 are installed from bottom to top, so that the lower surface 20 of the material slitting blade contacts the upper surface 21 of the lower section of the tool bar, and the upper inner hole 18 of the material slitting blade and the inner hole 19 of the chip guide ring are matched with a small gap in the middle section 22 of the tool bar. The chip slitting blade 5 is sleeved on the tool bar 3, and there is a small gap between the two, so that the lower surface 15 of the chip slitting blade contacts the chip guide ring boss 16. Screw the chip cutting blade locking nut 4 into the lower section 17 of the rear half of the tool rod, clamp the wrench on the slot 2 of the tool rod to fix the tool rod, tighten the chip cutting blade locking nut 4 with another wrench and press the above parts to complete the installation of all parts of the tool.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic chip-breaking disc cutter for ultrasonic cutting of honeycomb core, characterized in that: It comprises a tool bar, a chip slitting blade, a chip guide ring, a material slitting blade and a locking device, wherein the input end of the tool bar is connected to the ultrasonic vibration system, the chip slitting blade, the chip guide ring and the material slitting blade are connected to the tool bar from top to bottom, and the chip slitting blade, the chip guide ring and the material slitting blade are fixed to the tool bar by the locking device, there is a preset distance between the bottom end of the chip slitting blade, the top end of the material slitting blade and the chip guide ring, the chip slitting blade and the material slitting blade are both provided with a preset inclination angle, the maximum diameter of the chip guide ring is smaller than the maximum diameter of the chip slitting blade, and is also smaller than the minimum diameter of the material slitting blade, so that the chips in the cutting process enter the chip slitting blade through the chip guide ring; the tool bar is in the form of a stepped shaft, the size of the middle section of the stepped shaft is the largest, and the size decreases towards the two ends in sequence; The chip cutting blade and the material cutting blade are located at the position where the ultrasonic amplitude is the largest, and the chip guide ring is located at the position where the ultrasonic amplitude is the smallest; The blade diameter of the lower surface of the chip dividing blade is larger than the upper surface diameter of the chip guide ring matched therewith, and the radius difference between the two is larger than the maximum cutting depth of the tool.

2. The automatic chip-breaking disc cutter for ultrasonic cutting of honeycomb core according to claim 1, characterized in that: The locking device comprises a chip cutting blade locking nut which is screwed onto the cutter bar and pressed onto the chip cutting blade.

3. The automatic chip-breaking disc cutter for ultrasonic cutting of honeycomb core according to claim 1, characterized in that: The tool wedge angles of the chip cutting blade and the material cutting blade are less than 45 degrees.

4. The automatic chip-breaking disc cutter for ultrasonic cutting of honeycomb core according to claim 1, characterized in that: The middle section of the tool rod is provided with a protrusion protruding from the tool rod body, the upper surface of the material cutting blade cooperates with the lower surface of the protrusion in the middle section of the tool rod, the lower surface of the chip guide ring cooperates with the upper surface of the protrusion in the middle section of the tool rod, the lower surface of the chip cutting blade cooperates with the chip guide ring boss, and the locking device also includes a connecting screw, through which the material cutting blade is screwed to the threaded hole opened at the bottom of the tool rod.

5. The automatic chip-breaking disc cutter for ultrasonic cutting of honeycomb core according to claim 1, characterized in that: A base is provided at the bottom end of the tool rod, so that the lower surface of the material cutting blade can be installed on the base, the upper surface of the material cutting blade cooperates with the lower surface of the chip guide ring, the upper surface of the chip guide ring is provided with a boss, and the boss on the upper surface of the chip guide ring cooperates with the chip cutting blade.

6. The automatic chip-breaking disc cutter for ultrasonic cutting of honeycomb core according to claim 1, characterized in that: The chip guide ring is located between the chip slitting blade and the material slitting blade, and is coaxially arranged in a mechanical series relationship. The chip guide ring is in the form of a cylinder or a frustum, so as to guide the chips toward the slitting blade.

7. The automatic chip-breaking disc cutter for ultrasonic cutting of honeycomb core according to claim 1, characterized in that: The chip cutting blade locking nut is a thin part.

8. The automatic chip-breaking disc cutter for ultrasonic cutting of honeycomb core according to claim 1, characterized in that: The thread rotation direction of the lower section of the rear half of the tool rod is opposite to the thread rotation direction of the inner part of the tool rod.

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