Multi-shaft drilling device and using method thereof

Abstract

The invention provides a multi-shaft drilling device and a using method thereof. The multi-shaft drilling device comprises a lead screw support, a reference drilling shaft, a lead screw, a plurality of movable drilling shafts and a driving assembly. The reference drilling shaft is fixedly connected to the lead screw support. The lead screw is rotationally connected to the lead screw support, and N forward-spinning thread sections and N reverse-spinning thread sections are symmetrically arranged on the two sides of the lead screw in the length direction, away from the lead screw support, of the lead screw correspondingly. The multiple movable drilling shafts are in threaded connection with the N forward-spinning thread sections and the N reverse-spinning thread sections correspondingly. The driving assembly is connected to the lead screw and used for driving the lead screw to rotate. Wherein the thread rotation directions of the forward-rotation thread section and the reverse-rotation thread section are opposite, the thread pitch of the first forward-rotation thread section and the thread pitch of the first reverse-rotation thread section are both M, and the thread pitch of the Nth forward-rotation thread section and the thread pitch of the Nth reverse-rotation thread section are both NM. According to the drilling device, the distance between the multiple drilling shafts can be adjusted, so that the drilling requirements of acoustic lining holes with different distances are met, and then the drilling efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling equipment, and more specifically, to a multi-axis drilling device and a method for using the same. Background Art

[0002] Acoustic backing holes are one of the important means of controlling aircraft engine noise. When sound waves enter these holes, they will reflect and rub inside the material, eventually converting the sound energy into heat energy, thereby achieving the effect of noise reduction. Existing acoustic backing hole preparation generally requires independent hole making by a single drilling shaft or replacing drilling actuators with different spacings to achieve the preparation of holes with different spacings on parts. When it is necessary to prepare multiple acoustic backing holes with different spacings, it takes a certain amount of time to debug the equipment, which reduces the hole making efficiency. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The technical problem to be solved by the present invention is that the efficiency of preparing acoustic lining holes with various different spacings by existing drilling equipment is low.

[0005] (II) Technical solution

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] In the first aspect, the present invention provides a multi-axis drilling device, including a screw support, a reference drilling axis, a screw, a plurality of movable drilling axes and a driving assembly; the reference drilling axis is fixedly connected to the screw support; the screw is rotatably connected to the screw support, and along the length direction of the screw away from the screw support, N positive-spinning thread segments and N negative-spinning thread segments are symmetrically provided on both sides of the screw; a plurality of movable drilling axes are respectively threadedly connected to the N positive-spinning thread segments and the N negative-spinning thread segments; the driving assembly is connected to the screw for driving the screw to rotate; wherein the thread rotation direction of the positive-spinning thread segment is opposite to that of the negative-spinning thread segment, the pitch of the first positive-spinning thread segment and the pitch of the first negative-spinning thread segment are both M, and the pitch of the Nth positive-spinning thread segment and the pitch of the Nth negative-spinning thread segment are both NM.

[0008] Preferably, the driving assembly comprises a driving motor and a transmission assembly, the output end of the driving motor is connected to the input end of the transmission assembly, and the output end of the transmission assembly is connected to the screw rod.

[0009] Preferably, the transmission assembly includes a reducer, a driving pulley, a belt and a driven pulley, the input end of the reducer is connected to the output end of the drive motor, the output end of the reducer is connected to the driving pulley, the driven pulley is connected to the screw rod, and the belt drive connects the driving pulley and the driven pulley.

[0010] Preferably, the thread direction of the forward-hand thread segment is left-hand, and the thread direction of the reverse-hand thread segment is right-hand.

[0011] Preferably, the thread direction of the forward-turning thread segment is right-handed, and the thread direction of the reverse-turning thread segment is left-handed.

[0012] Preferably, the movable drilling shaft comprises a base, an electric spindle and a feed assembly, the base is threadedly connected to the screw, the feed assembly is connected to the base, and the output end of the feed assembly is connected to the electric spindle.

[0013] Preferably, it also includes a linear guide rail, which is fixedly connected to the screw support, and the movable drilling shaft is slidably connected to the linear guide rail.

[0014] Preferably, it further comprises a bearing, wherein the outer ring of the bearing is fixedly connected to the screw support, and the inner ring of the bearing is fixedly connected to the screw.

[0015] Preferably, a first step is provided between two adjacent positive-helical thread segments, and / or a second step is provided between two adjacent negative-helical thread segments.

[0016] In a second aspect, the present invention provides a method for using the multi-axis drilling device described in any one of the above technical solutions, which is used to make holes in parts, and the method comprises the following steps:

[0017] The driving assembly drives the screw rod to rotate;

[0018] The screw rod rotates to drive the N movable drilling shafts threadedly connected to the forward-spinning thread segment to move so that the distance between the axes of two adjacent movable drilling shafts is L, and drives the N movable drilling shafts threadedly connected to the reverse-spinning thread segment to move so that the distance between the axes of two adjacent movable drilling shafts is L;

[0019] The multi-axis drilling device is driven to feed, and the reference drilling axis and the movable drilling axis make holes in the part, thereby forming a plurality of group holes with a spacing of L on the part.

[0020] (III) Beneficial effects

[0021] The above technical solution of the present invention has at least the following advantages:

[0022] In the present invention, the driving assembly can drive the screw to rotate, and N positive-spinning thread segments and N reverse-spinning thread segments are symmetrically arranged on both sides of the screw, and the thread rotation directions of the positive-spinning thread segments and the reverse-spinning thread segments are opposite, so that the movable drilling axes on both sides of the screw can be driven to move relatively close or relatively away from each other, so as to adjust the spacing between two adjacent drilling axes, and because the pitch of the first positive-spinning thread segment and the pitch of the first reverse-spinning thread segment are both M, the pitch of the Nth positive-spinning thread segment and the pitch of the Nth reverse-spinning thread segment are both NM, that is, the pitch of the thread segment is set in a multiple relationship, so that the equal spacing between multiple movable drilling axes can be adjusted at the same time, so as to facilitate the preparation of groups of holes with different spacings. Compared with the prior art, the drilling axes in the present invention can be set in multiples, so as to increase the number of single drillings and improve the efficiency of drilling holes on parts. Moreover, the spacing between the drilling axes can be adjusted to meet the drilling requirements of acoustic lining holes with different spacings, avoiding the need to manually adjust the spacing of the drilling axes multiple times or replace drilling actuators with different spacings, reducing the time for equipment debugging, and improving the versatility of equipment use and drilling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the multi-axis drilling device provided in an embodiment of the present invention.

[0025] Figure 2 It is a schematic diagram of the internal structure of the multi-axis drilling device provided in an embodiment of the present invention.

[0026] Figure 3 It is a bottom view of the multi-axis drilling device provided by an embodiment of the present invention.

[0027] Figure 4 yes Figure 3 Cross-sectional view at CC.

[0028] Figure 5 It is a schematic diagram of the connection structure between the screw rod and multiple movable drilling shafts provided in an embodiment of the present invention.

[0029] The reference numerals in the figures are:

[0030] 1. Screw support; 2. Reference drilling axis; 3. Screw; 4. Mobile drilling axis; 5. Drive assembly table; 6. Linear guide; 7. Bearing; 41. Base; 42. Electric spindle; 51. Drive motor; 52. Transmission assembly; 81. The first positive thread segment; 82. The second positive thread segment; 83. The first step; 91. The first reverse thread segment; 92. The second reverse thread segment; 93. The second step; 521. Reducer; 522. Driving pulley; 523. Belt; 524. Driven pulley. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly located on the other element or indirectly located on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention, and do not indicate that a device or element must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating relative importance or indicating the number of technical features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The specific implementation of the present invention is described in more detail below in conjunction with specific embodiments:

[0035] like Figures 1 to 5As shown, an embodiment of the present invention provides a multi-axis drilling device, including a screw support 1, a reference drilling axis 2, a screw 3, a plurality of movable drilling axes 4 and a driving assembly 5; the reference drilling axis 2 is fixedly connected to the screw support 1; the screw 3 is rotatably connected to the screw support 1, and along the length direction of the screw 3 away from the screw support 1, N positive thread segments and N reverse thread segments are symmetrically arranged on both sides of the screw 3; the plurality of movable drilling axes 4 are respectively threadedly connected with the N positive thread segments and the N reverse thread segments; the driving assembly 5 is connected to the screw 3, and is used to drive the screw 3 to rotate; wherein, the thread rotation direction of the positive thread segment and the reverse thread segment are opposite, the pitch of the first positive thread segment and the pitch of the first reverse thread segment are both M, and the pitch of the Nth positive thread segment and the pitch of the Nth reverse thread segment are both NM. Specifically, the number of movable drilling axes 4 can be determined according to actual use requirements, and the more the number of movable drilling axes 4, the higher the drilling efficiency.

[0036] Specifically, in this embodiment, the reference drilling axis 2 is fixedly connected to the screw support 1, and the reference drilling axis 2 can be used as a fixed positioning reference. The spacing of other mobile drilling axes 4 is adjusted based on the fixed reference drilling axis 2, thereby achieving equal spacing adjustment of multiple mobile drilling axes. Further, in the initial state, the reference drilling axis 2 and the multiple mobile drilling axes are arranged at equal spacing, that is, the spacing between the reference drilling axis 2 and the mobile drilling axis 4, and between two adjacent mobile drilling axes 4 is a fixed value S. Preferably, in the initial state, the reference drilling axis 2 and the multiple mobile drilling axes are arranged closely together. Before drilling, the driving assembly 5 is first started, and the driving assembly 5 drives the screw 3 to rotate. Since multiple mobile drilling shafts 4 are threadedly connected to the screw 3, the rotation of the screw 3 can drive the mobile drilling shafts 4 on both sides of the screw support to move to both sides respectively. Since the pitches of multiple mobile drilling shafts 4 in the single direction are arranged in a multiple relationship along the direction away from the screw support 1, the multiple mobile drilling shafts 4 also move in a multiple relationship on the screw. Distance; for example, when the motor shaft of the driving assembly 5 rotates a circle, the mobile drilling shaft 4 of the first positive thread segment moves a distance aM, the mobile drilling shaft 4 of the second positive thread segment moves a distance 2aM, the mobile drilling shaft 4 of the first reverse thread segment moves a distance aM, and the mobile drilling shaft 4 of the second reverse thread segment moves 2aM, which can ensure that the distance between two adjacent drilling shafts is L = aM + S. In practical applications, different L values ​​can be selected according to different design requirements or process requirements. Furthermore, the multi-axis drilling device provided in this embodiment also includes a control module, which has a built-in relevant software control program or PLC control program. The software control program or PLC control program can realize automatic control of the drive component 5 through pre-programmed parameters, that is, during the drilling process, the number of rotations and the direction of the motor shaft of the motor of the drive component 5 can be automatically adjusted, thereby realizing automatic adjustment of the spacing between multiple drilling axes. It should be noted that the software control program is a prior art well known to those skilled in the art, and this application will not elaborate on it.

[0037] like Figure 4 As shown, in one embodiment, the driving assembly 5 includes a driving motor 51 and a transmission assembly 52, the output end of the driving motor 51 is connected to the input end of the transmission assembly 52, and the output end of the transmission assembly 52 is connected to the screw rod 3. Specifically, the specific structural form of the transmission assembly 52 includes but is not limited to a pulley transmission device or a gear box, which can be selected according to actual use requirements, and this application does not limit this.

[0038] In one embodiment, the transmission assembly 52 includes a speed reducer 521, a driving pulley 522, a belt 523, and a driven pulley 524. The input end of the speed reducer 521 is connected to the output end of the driving motor 51, the output end of the speed reducer 521 is connected to the driving pulley 522, the driven pulley 524 is connected to the screw rod 3, and the belt 523 is connected to the driving pulley 522 and the driven pulley 524. Specifically, the output end of the driving motor 51 rotates to drive the driving pulley 522 to rotate, and the driving pulley 522 transmits power to the driven pulley 524 through the belt 523, driving the driven pulley 524 to rotate, thereby driving the screw rod 3 to rotate. In this way, the movement of multiple movable drilling shafts 4 threadedly connected to the driving screw rod is achieved.

[0039] In one embodiment, the thread direction of the positive thread segment is left-handed, and the thread direction of the reverse thread segment is right-handed. The positive thread segment and the reverse thread segment have opposite directions of rotation, which can achieve the simultaneous driving of the movable drilling shafts 4 on both to move away from or closer to each other, thereby achieving the adjustment of the spacing between the two movable drilling shafts 4.

[0040] In one embodiment, the thread direction of the forward-hand thread segment is right-hand, and the thread direction of the reverse-hand thread segment is left-hand.

[0041] like Figure 2 As shown, in one embodiment, the mobile drilling shaft 4 includes a base 41, an electric spindle 42 and a feed assembly (not shown), the base 41 is threadedly connected to the screw 3, the feed assembly is connected to the base 41, and the output end of the feed assembly is connected to the electric spindle 42.

[0042] like Figure 4 As shown, in one of the embodiments, it also includes a linear guide rail 6, which is fixedly connected to the screw support 1, and the movable drilling shaft 4 is slidably connected to the linear guide rail 6.

[0043] like Figure 5 As shown, in one embodiment, it also includes a bearing 7, the outer ring of the bearing 7 is fixedly connected to the screw support 1, and the inner ring of the bearing 7 is fixedly connected to the screw 3.

[0044] like Figure 5 As shown, specifically, in this embodiment, there are preferably two positive thread segments, namely the first positive thread segment 81 and the second positive thread segment 82, and there are preferably two reverse thread segments, namely the first reverse thread segment 91 and the second reverse thread segment 92.

[0045] In one embodiment, a first step 83 is provided between two adjacent positive thread segments, and a second step 93 is provided between two adjacent reverse thread segments. Specifically, the first step 83 can limit the movement of the second positive thread segment 82, and the second step 93 can limit the movement of the second reverse thread segment 92.

[0046] The present invention provides a method for using the multi-axis drilling device of any one of the above embodiments, which is used for drilling holes in parts. The method comprises the following steps:

[0047] The driving assembly 5 drives the screw rod 3 to rotate;

[0048] The screw rod 3 rotates to drive the N movable drilling shafts 4 threadedly connected to the forward-spinning thread segments to move so that the distance between the axes of two adjacent movable drilling shafts 4 is L, and drives the N movable drilling shafts 4 threadedly connected to the reverse-spinning thread segments to move so that the distance between the axes of two adjacent movable drilling shafts 4 is L;

[0049] The multi-axis drilling device is driven to feed, and the reference drilling axis 2 and the movable drilling axis 4 make holes in the parts, forming a plurality of group holes with a spacing of L on the parts.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-axis drilling device, characterized in that: include: Screw support; A reference drilling shaft, fixedly connected to the screw support; A screw rod is rotatably connected to the screw rod support, and along the length direction of the screw rod away from the screw rod support, N positive thread segments and N reverse thread segments are symmetrically arranged on both sides of the screw rod; A plurality of movable drilling axes are respectively threadedly connected with the N positive-spinning thread segments and the N reverse-spinning thread segments; A driving assembly, connected to the screw rod, and used to drive the screw rod to rotate; Among them, the thread rotation directions of the forward-turning thread segment and the reverse-turning thread segment are opposite, the pitch of the first forward-turning thread segment and the pitch of the first reverse-turning thread segment are both M, and the pitch of the Nth forward-turning thread segment and the pitch of the Nth reverse-turning thread segment are both NM.

2. The multi-axis drilling device according to claim 1, characterized in that: The driving assembly comprises a driving motor and a transmission assembly, wherein the output end of the driving motor is connected to the input end of the transmission assembly, and the output end of the transmission assembly is connected to the screw rod.

3. The multi-axis drilling device according to claim 2, characterized in that: The transmission assembly includes a reducer, a driving pulley, a belt and a driven pulley, the input end of the reducer is connected to the output end of the drive motor, the output end of the reducer is connected to the driving pulley, the driven pulley is connected to the screw rod, and the belt transmission connects the driving pulley and the driven pulley.

4. The multi-axis drilling device according to claim 1, characterized in that: The thread direction of the forward-turning thread segment is left-handed, and the thread direction of the reverse-turning thread segment is right-handed.

5. The multi-axis drilling device according to claim 1, characterized in that: The thread rotation direction of the forward-turning thread segment is right-handed, and the thread rotation direction of the reverse-turning thread segment is left-handed.

6. The multi-axis drilling device according to claim 1, characterized in that: The movable drilling shaft comprises a base, an electric spindle and a feed assembly. The base is threadedly connected to the screw rod, the feed assembly is connected to the base, and the output end of the feed assembly is connected to the electric spindle.

7. The multi-axis drilling device according to claim 1, characterized in that: It also includes a linear guide rail, which is fixedly connected to the screw rod support, and the movable drilling shaft is slidably connected to the linear guide rail.

8. The multi-axis drilling device according to claim 1, characterized in that: It also includes a bearing, the outer ring of the bearing is fixedly connected to the screw support, and the inner ring of the bearing is fixedly connected to the screw.

9. The multi-axis drilling device according to claim 1, characterized in that: A first step is provided between two adjacent positive-spin thread segments, and / or a second step is provided between two adjacent negative-spin thread segments.

10. A method for using the multi-axis drilling device according to any one of claims 1 to 9, characterized in that: Used for making holes in parts, the method of use comprises the following steps: The driving assembly drives the screw rod to rotate; The screw rod rotates to drive the N movable drilling shafts threadedly connected to the forward-spinning thread segment to move so that the distance between the axes of two adjacent movable drilling shafts is L, and drives the N movable drilling shafts threadedly connected to the reverse-spinning thread segment to move so that the distance between the axes of two adjacent movable drilling shafts is L; The multi-axis drilling device is driven to feed, and the reference drilling axis and the movable drilling axis make holes in the part, thereby forming a plurality of group holes with a spacing of L on the part.

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