Continuous drilling machining device for sound equipment metal part

Abstract

The invention provides a sound equipment metal piece continuous drilling machining device, which relates to the technical field of drilling machining and comprises a drilling machine tool, a lifting drilling machine, a lifting pressing frame, a drilling table and a continuous transposition clamp. The downward pressing action of the lifting drilling machine is linked with the rotating and clamping actions of the continuous transposition clamp, after a mounting hole is drilled, the workpiece can be automatically rotated and positioned by downward pressing again without waiting for resetting of the transposition mechanism, the machining period of a single workpiece is greatly shortened, compared with traditional equipment, the device can shorten the machining period, and the machining efficiency is improved. And the production efficiency is obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling, and in particular to a continuous drilling processing device for audio metal parts. Background Art

[0002] In the field of audio equipment manufacturing, the drilling processing of metal structural parts is one of the key processes. For typical audio metal parts, such as speaker frames and mounting brackets, multiple mounting holes distributed in a circular array are often required to be processed to meet the positioning requirements for subsequent component assembly.

[0003] Traditional drilling processing methods usually adopt a single-station fixed fixture in combination with manual alignment. After each drilling, the workpiece needs to be manually rotated and repositioned, resulting in problems such as low processing efficiency, positioning accuracy depending on operation experience, and high labor intensity.

[0004] In response to the processing requirements of circular array hole positions, some improved solutions have also emerged in the prior art. For example, a cam indexing device or a pneumatic indexing device is used to realize the rotation of the workpiece. However, such solutions have problems such as complex structure, high manufacturing cost, and difficult maintenance. Especially for audio metal parts with a small diameter, the contradiction between the space occupation of the traditional transposition mechanism and the accuracy control is more prominent. Summary of the Invention

[0005] The purpose of the present invention is to provide a continuous drilling processing device for audio metal parts to solve the problems of low processing efficiency, positioning accuracy depending on operation experience, and high labor intensity in the above-mentioned background.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is that a continuous drilling processing device for audio metal parts includes: a drilling machine tool, a lifting drilling machine, a lifting pressure frame, a drilling table, and a continuous transposition fixture. The lifting drilling machine is connected to the drilling machine tool through a screw rod drive, and a lifting pressure frame is arranged at the lower end of the lifting drilling machine; A continuous transposition fixture is fixedly installed on the drilling table. The continuous transposition fixture includes a mounting seat, which is fixedly installed on the drilling table through bolts to achieve a rigid connection between the fixture and the drilling table, ensuring no displacement deviation during the processing. A first inner cylinder is fixedly connected to the mounting seat. A first outer cylinder is sleeved outside the first inner cylinder. Vertical grooves and inclined grooves are machined on the inner side of the first outer cylinder, and a deflection groove is machined at the bottom of the vertical groove. A rotating slider is fixedly connected to the outside of the first inner cylinder, and the rotating slider is slidably connected to the vertical groove, the inclined groove, and the deflection groove. The intermittent rotation of the workpiece placement disk is realized through a cam track structure, and the single rotation angle is strictly matched with the central angle of the mounting hole of the metal part to be processed. A workpiece placement disk is fixedly connected to the upper end of the first outer cylinder.

[0007] Furthermore, the step-up and step-down frame includes a sliding hoop which is arranged outside the lifting drilling rig and is slidably connected to the lifting drilling rig. A first spring is provided between the sliding hoop and the lifting drilling rig above the sliding hoop to provide elastic buffering, avoid workpiece deformation caused by rigid impact, and at the same time allow the step-up and step-down ring to float within a certain range to adapt to the uneven surface of the workpiece. Both sides of the sliding hoop are fixedly connected with first adjusting brackets through bolts. A second adjusting bracket is fixedly connected below the first adjusting bracket, and a step-up and step-down ring is fixedly connected to the lower end of the second adjusting bracket. A first adjusting groove is formed in the first adjusting bracket, and a second adjusting groove is formed in the second adjusting bracket. A fixing bolt penetrates and is fixedly connected in the first adjusting groove and the second adjusting groove. The coaxiality calibration of the step-up and step-down ring and the drill bit is realized through a two-dimensional adjusting structure to ensure the drilling position accuracy error.

[0008] Furthermore, a second spring is sleeved outside the first inner cylinder. The second spring is located between the mounting seat and the first outer cylinder. The second spring provides a reset elastic force to enable the first outer cylinder to automatically rise after the pressure is released, preparing for the next drilling cycle.

[0009] Furthermore, there are six groups of vertical grooves, and the six groups of vertical grooves are evenly arranged around the inner side of the first outer cylinder. The adjacent vertical grooves are connected end to end through inclined grooves. The deviation groove deviates to one side of the nearest inclined groove. The six groups of vertical grooves and the inclined grooves form a cam track, and the single rotation angle is accurately limited to 60°, ensuring the precise alignment of the mounting hole of the metal workpiece to be processed and the drill bit.

[0010] Furthermore, a ring-shaped rotating disk is rotatably connected to the outside of the workpiece placing disk. An interference fit is adopted between the workpiece placing disk and the ring-shaped rotating disk. The interference fit provides an initial rotational resistance to ensure the relative static state of the two in the non-working state and prevent position deviation caused by accidental contact.

[0011] Furthermore, rotating shafts are arranged around the workpiece placing disk. The workpiece placing disk is rotatably connected with clamping pressure rods through the rotating shafts. Clamping chutes are formed in the ring-shaped rotating disk. One end of a clamping pressure rod is fixedly connected with a clamping slider, and the clamping slider is slidably connected with the clamping chute. The other end of the clamping pressure rod is fixedly connected with a workpiece pressing block. The linear motion of the ring-shaped rotating disk is converted into the swinging of the clamping pressure rod through a lever mechanism to realize the automatic centering and positioning of the workpiece.

[0012] Furthermore, there are six groups of clamping pressure rods, and the six groups of clamping pressure rods are spirally distributed. The spiral distribution enables the clamping force to act evenly on the outer periphery of the metal workpiece to be processed, avoiding workpiece deformation caused by local stress concentration.

[0013] Furthermore, there are six groups of clamping chutes, and the axes of the six groups of clamping chutes all intersect at the center of the ring-shaped rotating disk. The centripetal distribution of the six groups of clamping chutes ensures the synchronous sliding of the clamping sliders to realize the central symmetric positioning of the workpiece and eliminate the eccentricity error.

[0014] Furthermore, a second inner cylinder is provided on the outer side of the first inner cylinder. The second inner cylinder is fixedly connected to the mounting base. A second outer cylinder is sleeved on the outer side of the second inner cylinder. A vertical limiting groove is provided between the second inner cylinder and the second outer cylinder. The vertical limiting groove is used to limit the rotation between the second inner cylinder and the second outer cylinder. The vertical limiting groove cooperates with the key groove to allow the second outer cylinder to slide only in the vertical direction, ensuring the contact flatness of the first friction ring and the second friction ring. A third spring is sleeved on the outer side of the second inner cylinder. The third spring is located between the second outer cylinder and the mounting base. The third spring provides a vertical reset force to keep the first friction ring and the second friction ring separated in the non-working state, reducing wear. The upper end of the second outer cylinder is fixedly connected with a first friction ring through bolts. The lower part of the outer edge of the annular rotating disk is fixedly connected with a second friction ring through bolts. The resistance generated by the friction pair forces the workpiece placing disk and the annular rotating disk to rotate relatively, realizing the linkage control of positioning and clamping.

[0015] Furthermore, the hardness of the first spring is greater than that of the second spring and the third spring. The high hardness of the first spring ensures that the pressure of the lifting and pressing frame is preferentially transmitted to the continuous transposition fixture, avoiding the drill bit of the lifting drill from contacting the workpiece prematurely.

[0016] Compared with the prior art, the beneficial effects of the present invention include: 1. A continuous drilling processing device for audio metal parts proposed by the present invention, through the linkage of the downward pressing action of the lifting drill and the rotation and clamping actions of the continuous transposition fixture. After drilling an installation hole, pressing down again can automatically complete the rotation and positioning of the workpiece without waiting for the transposition mechanism to reset, greatly shortening the processing cycle of a single workpiece. Compared with traditional equipment, this device can shorten the processing cycle and significantly improve production efficiency.

[0017] 2. A continuous drilling processing device for audio metal parts proposed by the present invention. During the process of the lifting and pressing ring pressing down to push the annular rotating disk and the workpiece placing disk to descend, the frictional force generated by the contact between the annular rotating disk and the first friction ring forces the workpiece placing disk and the annular rotating disk to rotate relatively. Through the cooperation of the clamping slider and the clamping chute, the clamping pressure rod drives the workpiece pressing block to move towards the center of the workpiece placing disk, realizing the automatic centering positioning and clamping of the workpiece, improving the positioning accuracy, and at the same time avoiding the problems of uneven clamping force distribution and workpiece deformation caused by manual adjustment, ensuring the perpendicularity of drilling. Description of the Drawings

[0018] The disclosure of the present invention will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the protection scope of the present invention. In the drawings, the same reference numerals are used to refer to the same components. Among them: Figure 1 Schematically shows the external structural view of a continuous drilling processing device for audio metal parts proposed according to an embodiment of the present invention; Figure 2 Schematically shows a schematic diagram of the lifting and pressure frame and the continuous transposition fixture structure of a continuous drilling processing device for audio metal parts proposed according to an embodiment of the present invention; Figure 3 Schematically shows a schematic diagram of the continuous transposition fixture and the metal part to be processed of a continuous drilling processing device for audio metal parts proposed according to an embodiment of the present invention; Figure 4 Schematically shows a schematic diagram of the continuous transposition fixture structure of a continuous drilling processing device for audio metal parts proposed according to an embodiment of the present invention; Figure 5 Schematically shows a schematic diagram of the workpiece placement plate structure of a continuous drilling processing device for audio metal parts proposed according to an embodiment of the present invention; Figure 6 Schematically shows a schematic diagram of the first inner cylinder and the first outer cylinder structure of a continuous drilling processing device for audio metal parts proposed according to an embodiment of the present invention; Figure 7 Schematically shows a schematic cross-sectional view of the continuous transposition fixture of a continuous drilling processing device for audio metal parts proposed according to an embodiment of the present invention; Figure 8 Schematically shows a schematic diagram of the clamping pressure rod structure of a continuous drilling processing device for audio metal parts proposed according to an embodiment of the present invention.

[0019] Reference numerals in the figure: 1, drilling machine tool; 2, lifting drilling rig; 3, lifting and pressure frame; 301, sliding hoop; 302, first spring; 303, first adjusting bracket; 304, second adjusting bracket; 305, lifting and pressure ring; 306, first adjusting groove; 307, second adjusting groove; 308, fixing bolt; 4, drilling table; 5, continuous transposition fixture; 6, mounting seat; 7, first inner cylinder; 701, rotating slider; 8, first outer cylinder; 9, second spring; 10, vertical groove; 11, inclined groove; 12, deflection groove; 13, workpiece placement plate; 14, annular rotating disk; 15, rotating shaft; 16, clamping pressure rod; 17, clamping chute; 18, clamping slider; 19, workpiece pressing block; 20, metal part to be processed; 2001, mounting hole; 21, second inner cylinder; 22, second outer cylinder; 23, vertical limiting groove; 24, third spring; 25, first friction ring; 26, second friction ring. Detailed implementation manners

[0020] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, those of ordinary skill in the art can propose various interchangeable structural forms and implementation methods. Therefore, the following specific embodiments and the accompanying drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction on the technical solution of the present invention.

[0021] Combined with an embodiment of the present invention Figure 1-8 Shown. A continuous drilling processing device for audio metal parts, the working object is the metal part 20 to be processed, and there are six mounting holes 2001 arranged in a circular array on the metal part 20 to be processed.

[0022] A continuous drilling processing device for audio metal parts includes: a drilling machine tool 1, a lifting drilling machine 2, a lifting pressure frame 3, a drilling table 4 and a continuous replacement fixture 5. The lifting drilling machine 2 is connected to the drilling machine tool 1 through a screw rod drive. A lifting pressure frame 3 is arranged at the lower end of the lifting drilling machine 2. The lifting pressure frame 3 includes a sliding hoop 301. The sliding hoop 301 is arranged outside the lifting drilling machine 2 and is slidably connected to the lifting drilling machine 2. A first spring 302 is arranged between the sliding hoop 301 and the lifting drilling machine 2 above. The first spring 302 is used to provide elastic buffering to avoid rigid impact on the workpiece when the lifting pressure frame 3 presses down, and ensure the smoothness of the pressing process. Both sides of the sliding hoop 301 are fixedly connected with a first adjustment bracket 303 through bolts. A second adjustment bracket 304 is fixedly connected below the first adjustment bracket 303. A lifting pressure ring 305 is fixedly connected to the lower end of the second adjustment bracket 304. A first adjustment groove 306 is formed in the first adjustment bracket 303, and a second adjustment groove 307 is formed in the second adjustment bracket 304. The first adjustment groove 306 and the second adjustment groove 307 cooperate to form a two-dimensional adjustment structure. The position of the lifting pressure ring 305 can be finely adjusted in the horizontal direction by loosening or tightening the fixing bolt 308. A fixing bolt 308 penetrates and is fixedly connected in the first adjustment groove 306 and the second adjustment groove 307; A continuous transposition fixture 5 is fixedly installed on the drilling table 4. The continuous transposition fixture 5 includes a mounting base 6, and the mounting base 6 is fixedly installed on the drilling table 4 by bolts to achieve a rigid connection between the fixture and the drilling table 4, ensuring stability during the machining process. A first inner cylinder 7 is fixedly connected to the mounting base 6. A first outer cylinder 8 is sleeved outside the first inner cylinder 7. A second spring 9 is also sleeved outside the first inner cylinder 7. The second spring 9 is located between the mounting base 6 and the first outer cylinder 8 and is used to provide a reset elastic force to enable the first outer cylinder 8 to automatically rise after the lifting pressure ring 305 disengages. Six groups of vertical grooves 10 and inclined grooves 11 are machined on the inner side of the first outer cylinder 8, and adjacent vertical grooves 10 are connected end to end through the inclined grooves 11. The vertical grooves 10 and the inclined grooves 11 form a cam track for guiding the movement track of the rotating slider 701 to achieve the intermittent rotation of the workpiece placement plate 13. A bias groove 12 is machined at the bottom of the vertical groove 10. The function of the bias groove 12 is that when the rotating slider 701 slides to the lower end of the vertical groove 10, the rotating slider 701 is deflected, changing the relative position between the rotating slider 701 and the vertical groove 10. In this way, when the rotating slider 701 slides upward again, it will not return to the vertical groove 10 but will enter the inclined groove 11, ensuring the unidirectionality and angle accuracy of each rotation. A rotating slider 701 is fixedly connected to the outside of the first inner cylinder 7, and the rotating slider 701 is slidably connected to the vertical groove 10, the inclined groove 11, and the bias groove 12.

[0023] The upper end of the first outer cylinder 8 is fixedly connected to a workpiece placement plate 13 for carrying the metal workpiece 20 to be processed and transmitting the rotation action. An annular rotating disk 14 is rotatably connected to the outside of the workpiece placement plate 13. An interference fit is adopted between the workpiece placement plate 13 and the annular rotating disk 14. The interference fit provides an initial rotational resistance to ensure the relative static state of the two in the non-working state. Six rotating shafts 15 are arranged around the workpiece placement plate 13. The workpiece placement plate 13 is rotatably connected to a clamping pressure rod 16 through the rotating shafts 15. The rotating shafts 15 provide a rotation fulcrum for the clamping pressure rod 16, enabling it to swing around the fulcrum to clamp the workpiece. A clamping chute 17 is formed on the annular rotating disk 14. The clamping chute 17 provides a guiding track for the sliding of the clamping slider 18, converting the linear motion of the annular rotating disk 14 into the swinging action of the clamping pressure rod 16. One end of the clamping pressure rod 16 is fixedly connected to a clamping slider 18, and the clamping slider 18 is slidably connected to the clamping chute 17. The other end of the clamping pressure rod 16 is fixedly connected to a workpiece pressing block 19. The workpiece pressing block 19 is used to directly contact the metal workpiece 20 to be processed, and the workpiece is clamped and released by the swinging of the clamping pressure rod 16.

[0024] A second inner cylinder 21 is provided outside the first inner cylinder 7. The second inner cylinder 21 is fixedly connected to the mounting seat 6. A second outer cylinder 22 is sleeved outside the second inner cylinder 21. A vertical limiting groove 23 is provided between the second inner cylinder 21 and the second outer cylinder 22. The vertical limiting groove 23 is used to limit the rotation between the second inner cylinder 21 and the second outer cylinder 22, ensuring that the two can only slide relative to each other in the vertical direction. A third spring 24 is sleeved outside the second inner cylinder 21. The third spring 24 is located between the second outer cylinder 22 and the mounting seat 6 and is used to provide a restoring force in the vertical direction to ensure that the first friction ring 25 and the second friction ring 26 are separated in the non-working state. The upper end of the second outer cylinder 22 is fixedly connected with a first friction ring 25 by bolts. The first friction ring 25 and the second friction ring 26 cooperate to form a friction pair, and the rotation of the annular rotating disk 14 is blocked by friction, forcing the workpiece placing disk 13 to generate relative movement with the annular rotating disk 14. A second friction ring 26 is fixedly connected to the lower part of the outer edge of the annular rotating disk 14 by bolts.

[0025] Specifically, the hardness of the first spring 302 in the lifting and pressure regulating frame 3 is greater than that of the second spring 9 and the third spring 24. In this way, after the second spring 9 and the third spring 24 are compressed and the workpiece placing disk 13 descends in place, the first spring 302 will be compressed, and then the drill bit of the lifting drill 2 starts to drill.

[0026] Working principle: A continuous drilling device for audio metal parts is used for continuous drilling of audio metal parts. Six mounting holes 2001 to be processed are provided on the metal part 20 to be processed. When drilling, the lifting and pressure regulating frame 3 needs to be adjusted first. First, loosen the fixing bolt 308, and then adjust the relative positions of the first adjusting bracket 303 and the second adjusting bracket 304 through the first adjusting groove 306 and the second adjusting groove 307, so as to realize the adjustment and positioning of the relative positions of the drill bit of the lifting drill 2 and the lifting and pressure regulating ring 305.

[0027] When installing the continuous commutation fixture 5, it is necessary to make the continuous commutation fixture 5 coaxial with the lifting pressure ring 305. Thus, when the lifting drill 2 presses down, the lifting pressure ring 305 can accurately press on the annular rotating disk 14, thereby pushing down the annular rotating disk 14 and the workpiece placing disk 13. Furthermore, the first outer cylinder 8 descends. As a result, the rotating slider 701 located at the bottom of the deflection groove 12 will slide along the inclined groove 11, and thus the workpiece placing disk 13 will rotate counterclockwise. During the descent of the annular rotating disk 14, the second friction ring 26 below it will come into contact with the first friction ring 25. Thereby, the frictional force will prevent the rotation of the annular rotating disk 14. Furthermore, the workpiece placing disk 13 and the annular rotating disk 14 will rotate relative to each other. When the workpiece placing disk 13 and the annular rotating disk 14 rotate relative to each other, the clamping slider 18 will slide outwards along the clamping chute 18, thereby causing the clamping pressure rod 16 to rotate, making the workpiece pressing block 19 at one end of the clamping pressure rod 16 move towards the center of the workpiece placing disk 13, adjusting the position of the metal workpiece to be machined 20, so that the metal workpiece to be machined 20 accurately reaches the machining position. At the same time, the workpiece pressing block 19 will also fix the metal workpiece to be machined 20. And because there is an interference fit between the workpiece placing disk 13 and the annular rotating disk 14, there is a rotational resistance. At the same time, under the lever action, it is difficult for the metal workpiece to be machined 20 to push the clamping pressure rod 16, so the clamping is not easy to loosen.

[0028] Since each time the annular rotating disk 14 and the workpiece placing disk 13 are pressed down, the rotation angle of the workpiece placing disk 13 is the same as the central angle of the adjacent mounting holes 2001 on the metal workpiece to be machined 20, both being 60 degrees. In this way, after drilling the first mounting hole 2001, when the annular rotating disk 14 and the workpiece placing disk 13 descend again, the workpiece placing disk 13 will rotate counterclockwise by 60 degrees, causing the metal workpiece to be machined 20 to also rotate by 60 degrees, realizing continuous drilling and automatic alignment. Thus, there is no need to perform positioning each time drilling is carried out. The above solution not only realizes the automatic centering and positioning of the workpiece, but also can automatically change the position after each drilling to position the next hole position.

[0029] The technical scope of the present invention is not limited to the content described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A continuous drilling processing device for audio metal parts, characterized in that, Including: A drilling machine tool, on which a lifting drilling rig is connected by a lead screw drive, and a lifting pressure frame is arranged at the lower end of the lifting drilling rig; A drilling table is arranged on the drilling machine tool, and a continuous transposition clamp is fixedly installed on the drilling table. The continuous transposition clamp includes a mounting seat, the mounting seat is fixedly installed on the drilling table by bolts, a first inner cylinder is fixedly connected to the mounting seat, a first outer cylinder is sleeved outside the first inner cylinder, vertical grooves and inclined grooves are machined on the inner side of the first outer cylinder, a deflection groove is machined at the bottom of the vertical groove, a rotating slider is fixedly connected to the outside of the first inner cylinder, and the rotating slider is slidably connected with the vertical groove, the inclined groove and the deflection groove. A workpiece placing disc is fixedly connected to the upper end of the first outer cylinder.

2. The continuous drilling processing device for audio metal parts according to claim 1, characterized in that, The lifting pressure frame includes a sliding hoop, the sliding hoop is arranged outside the lifting drilling rig and is slidably connected with the lifting drilling rig. A first spring is arranged between the sliding hoop and the lifting drilling rig above. The two sides of the sliding hoop are fixedly connected by bolts to a first adjusting bracket. A second adjusting bracket is fixedly connected below the first adjusting bracket. A lifting pressure ring is fixedly connected to the lower end of the second adjusting bracket. A first adjusting groove is opened on the first adjusting bracket, a second adjusting groove is opened on the second adjusting bracket, and a fixing bolt is penetrated and fixedly connected in the first adjusting groove and the second adjusting groove.

3. A continuous drilling processing device for audio metal parts according to claim 2, characterized in that, A second spring is also sleeved outside the first inner cylinder, and the second spring is located between the mounting seat and the first outer cylinder.

4. The continuous drilling processing device for audio metal parts according to claim 1, characterized in that, Six groups of the vertical grooves are provided, and the six groups of vertical grooves are evenly arranged around the inner side of the first outer cylinder. Adjacent vertical grooves are connected end to end by inclined grooves, and the deflection groove deflects to one side of the nearest inclined groove.

5. A continuous drilling processing device for audio metal parts according to claim 1, characterized in that, An annular rotating disc is rotatably connected to the outside of the workpiece placing disc, and an interference fit is adopted between the workpiece placing disc and the annular rotating disc.

6. The continuous drilling processing device for audio metal parts according to claim 5, characterized in that, Rotating shafts are arranged around the workpiece placing disc. The workpiece placing disc is rotatably connected with clamping pressure rods through the rotating shafts. Clamping sliding grooves are opened on the annular rotating disc. A clamping slider is fixedly connected to one end of the clamping pressure rod, and the clamping slider is slidably connected with the clamping sliding groove. A workpiece pressing block is fixedly connected to the other end of the clamping pressure rod.

7. The continuous drilling processing device for audio metal parts according to claim 6, wherein, Six groups of the clamping pressure rods are provided, and the six groups of clamping pressure rods are spirally distributed.

8. The continuous drilling processing device for audio metal parts according to claim 6, characterized in that, Six groups of the clamping sliding grooves are provided, and the axes of the six groups of clamping sliding grooves all intersect at the center of the annular rotating disc.

9. A continuous drilling processing device for audio metal parts according to claim 5, characterized in that, A second inner cylinder is arranged outside the first inner cylinder, the second inner cylinder is fixedly connected to the mounting seat, a second outer cylinder is sleeved outside the second inner cylinder, a vertical limiting groove is arranged between the second inner cylinder and the second outer cylinder for limiting the rotation between the second inner cylinder and the second outer cylinder. A third spring is sleeved outside the second inner cylinder, and the third spring is located between the second outer cylinder and the mounting seat. A first friction ring is fixedly connected to the upper end of the second outer cylinder by bolts, and a second friction ring is fixedly connected to the lower part of the outer edge of the annular rotating disc by bolts.

10. The continuous drilling processing device for audio metal parts according to claim 2, characterized in that, The hardness of the first spring is greater than that of the second spring and the third spring.

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