Cambered surface drilling auxiliary device and cambered surface drilling method

Abstract

The cambered surface drilling auxiliary device and the cambered surface drilling method are applied to an arc-shaped workpiece or an annular workpiece, the cambered surface drilling auxiliary device comprises a rolling positioning mechanism, a drilling mechanism and a positioning connecting mechanism, and the rolling positioning mechanism is used for moving in the circumferential direction of the workpiece so as to drive the drilling mechanism to move in the circumferential direction of the workpiece; the locking mechanism is used for locking and fixing the workpiece when the locking mechanism moves to a preset circumferential position of the workpiece; the drilling mechanism is connected to the rolling positioning mechanism through the positioning connecting mechanism, and the positioning connecting mechanism is used for adjusting the axial position of the drilling mechanism relative to the workpiece; the output end of the drilling mechanism is located on the radial line of the workpiece, and the drilling mechanism is used for conducting ultrasonic drilling on the workpiece.

Description

Technical Field

[0001] The present invention relates to the technical field of arc-shaped workpiece drilling, and in particular, to an arc surface drilling auxiliary device. In addition, the present invention also relates to an arc surface drilling method including the arc surface drilling auxiliary device. Background Art

[0002] In the prior art, most drilling equipment used for drilling large-diameter curved workpieces adopts a fixed integrated structural design. The drilling tooling with a fixed integrated structural design has good integrity and high stability. However, during use, the existing drilling tooling equipment is large in size and mass, inconvenient to move, and cannot replace curved positioning plates with different curvatures and radii according to usage conditions, making it impossible for the existing drilling tooling to perform positioning drilling on curved workpieces with different hole spacings and different radii. There are certain limitations in use, and the drilling position using a magnetic drill jig is low in efficiency, low in hole size accuracy, and poor in surface roughness.

[0003] For example, in the technical solution disclosed in publication number CN 220515505 U, a positioning mechanism for arc surface drilling is provided, including: an arc cantilever, a sliding assembly and a locking member, the sliding assembly is located on the outside of the arc cantilever and slides with the arc cantilever, and the central axis of the sliding assembly coincides with the central axis of the arc cantilever, the sliding assembly is connected to the arc cantilever through the locking member; the sliding assembly is detachably connected with a positioning hole sleeve for positioning. The sliding assembly of the utility model can slide along the outer circumference of the arc cantilever, and because the central axis of the sliding assembly coincides with the central axis of the arc cantilever, the sliding assembly will deflect at an angle when sliding along the circumference of the arc cantilever, thereby adjusting the position of the positioning hole sleeve so that the positioning hole sleeve is aligned with the position to be drilled, and the locking member is used to fix and lock the sliding assembly and the arc cantilever, and then the external drill bit is inserted into the positioning hole sleeve to realize the drilling operation of the arc workpiece to be drilled, and the utility model has strong versatility. It uses sliding components and locking parts to achieve drilling of holes distributed at different angles on a certain diameter arc surface, but the processing range is limited and it cannot adapt to the drilling of arc-shaped workpieces with different diameters. Summary of the invention

[0004] The present invention provides an arc surface drilling auxiliary device and an arc surface drilling method to solve the technical problems that the existing drilling tooling cannot adapt to arc-shaped workpieces with different diameters and different hole spacings for positioning drilling, and that the drilling jig and magnetic drill are manually moved multiple times, the clamping times are large, and the processing efficiency is low.

[0005] According to one aspect of the present invention, there is provided an arc surface drilling auxiliary device, wherein the workpiece is arc-shaped or annular, and the arc surface drilling auxiliary device comprises a rolling positioning mechanism, a drilling mechanism and a positioning connection mechanism, wherein the rolling positioning mechanism is used to move along the circumference of the workpiece and thereby drive the drilling mechanism to move along the circumference of the workpiece, and is used to lock and fix the drilling mechanism on the workpiece when it moves to a preset circumferential position of the workpiece; the drilling mechanism is connected to the rolling positioning mechanism through the positioning connection mechanism, and the positioning connection mechanism is used to adjust the axial position of the drilling mechanism relative to the workpiece; the output end of the drilling mechanism is located on the radial line of the workpiece, and the drilling mechanism is used to perform ultrasonic drilling on the workpiece.

[0006] As a further improvement of the above technical solution, the rolling positioning mechanism includes a first base and a second base which are symmetrically distributed and arranged at both ends of the positioning and connecting mechanism. The first base is arranged at a high position, and the first base is provided with a first rolling member for cooperating with the wall surface of the workpiece and a second rolling member for cooperating with a preset end surface of the workpiece; the second base is provided with a first rolling member for cooperating with the wall surface of the workpiece, and the first base and the second base are respectively provided with locking mechanisms for cooperating with the two opposite end surfaces of the workpiece.

[0007] As a further improvement of the above technical solution, the first rolling element and the second rolling element of the first base are both rollers, or the first rolling element of the first base is a gear, and the locking mechanism includes a rack plate used to be arranged on the inner wall of the workpiece to cooperate with the gear, and the rack plate matches the curvature of the workpiece.

[0008] As a further improvement of the above technical solution, counterweights are provided on both sides of the first base.

[0009] As a further improvement of the above technical solution, the drilling mechanism includes an ultrasonic drill and a sliding base, and the ultrasonic drill is slidably connected to the sliding base so as to move along the axial direction of the ultrasonic drill with the sliding base.

[0010] As a further improvement of the above technical solution, the outer wall of the ultrasonic drilling rig is provided with a limiting structure for cooperating with the sliding base.

[0011] As a further improvement of the above technical solution, the positioning and connecting mechanism includes at least one screw threadedly connected to the drilling mechanism, at least one guide member and a driving mechanism for driving the screw to rotate, and the guide member is used to limit the circumferential rotation of the drilling mechanism when the driving mechanism drives the screw to rotate, thereby causing the drilling mechanism to move along the direction of the screw.

[0012] As a further improvement of the above technical solution, the rolling positioning mechanism includes a locking mechanism; the arc surface drilling auxiliary device also includes a dividing template for being arranged on the inner arc surface or end surface of the workpiece, and the arc length and arc of the dividing template are respectively matched with the workpiece; the dividing template is provided with a positioning structure that matches the circumferential distribution position of the target hole position of the workpiece, and the locking mechanism is used to cooperate with the positioning structure when the rolling positioning mechanism moves to a preset circumferential position corresponding to the target hole position.

[0013] As a further improvement of the above technical solution, the rolling positioning mechanism is provided with a first feedback module for feedback of the arc and / or arc length of the rolling positioning mechanism moving relative to the workpiece, and / or the drilling mechanism is provided with a second feedback module for feedback of the axial position of the drilling mechanism relative to the positioning connection mechanism.

[0014] According to another aspect of the present invention, a curved surface drilling method is provided, using the above-mentioned curved surface drilling auxiliary device, and the curved surface drilling method comprises:

[0015] S1. Lock and fix the rolling positioning mechanism on the preset starting drilling circumferential position of the workpiece;

[0016] S2. manually controlling the driving mechanism based on the axial position of the drilling mechanism fed back by the second feedback module or controlling the driving mechanism to move the drilling mechanism to a preset axial position with a preset program;

[0017] S3. Start drilling by manually controlling or automatically controlling the drilling mechanism with a preset program;

[0018] S4. After the current drilling is completed, repeat steps S2-S3 until the drilling of holes at each axial position on the current circumferential position of the workpiece is completed;

[0019] S5. Release the locking of the rolling positioning mechanism, and move the rolling positioning mechanism along the circumference of the workpiece to the next preset circumferential position based on the circumferential position of the rolling positioning mechanism fed back by the first feedback module, and repeat steps S2-S4;

[0020] S6. Repeat step S5 until all holes are drilled.

[0021] The present invention has the following beneficial effects:

[0022] The arc surface drilling auxiliary device is used for drilling radial holes of annular workpieces or arc-shaped workpieces. The rolling positioning mechanism cooperates with the end face and / or arc surface of the workpiece to drive the drilling device to move along the circumference of the workpiece, so that the drilling mechanism moves to a preset circumferential position corresponding to the target hole position on the workpiece, and the rolling positioning mechanism is locked and fixed to the workpiece. When the positioning connection mechanism drives the drilling mechanism to move parallel to the axial direction of the workpiece, during the axial and circumferential movement of the workpiece, the output end of the drilling mechanism always remains on the radial line of the workpiece, that is, when moving to any target hole position, its output end is perpendicular to the target. The wall position where the hole is located can realize the drilling of arc-surface workpieces with hole distributions of different angles and different hole distances. The drilling mechanism uses ultrasonic drilling, which effectively improves the drilling efficiency, drilling size accuracy and surface roughness through the ultrasonic high-frequency vibration, improves the hole quality and reduces tool loss. By applying this auxiliary device, there is no need to manually move the drilling tooling multiple times, no need to manually install special locating pins to lock the drilling tooling, and no need for manual drilling and tapping, which reduces the clamping time, improves production efficiency, and reduces labor intensity. It can be suitable for semi-automatic processing and mass production of arc-surface workpieces of different specifications.

[0023] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 is a reference diagram of the use status of a preferred embodiment of the present invention;

[0026] Figure 2 It is a structural schematic diagram of a preferred embodiment of the present invention;

[0027] Figure 3 is a bottom schematic diagram of a first base according to a preferred embodiment of the present invention;

[0028] Figure 4 is a top schematic diagram of a first base of a preferred embodiment of the present invention;

[0029] Figure 5 It is a partial structural schematic diagram of the positioning connection mechanism of a preferred embodiment of the present invention;

[0030] Figure 6 is a structural schematic diagram of a drilling mechanism according to a preferred embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of a portion of the structure of a rack plate used in an embodiment of the present invention. Figure 1 ;

[0032] Figure 8 This is a schematic diagram of a portion of the structure of a rack plate used in an embodiment of the present invention. Figure 2 ;

[0033] Fig. 9 This is a schematic diagram of a partial structure of a graduation template used in an embodiment of the present invention. Figure 1 ;

[0034] Fig.10 This is a schematic diagram of a partial structure of a graduation template used in an embodiment of the present invention. Figure 2 .

[0035] Legend:

[0036] 100, first base; 101, first rolling element; 102, first feedback module; 103, second rolling element; 104, locking top block; 105, counterweight block; 106, rack plate; 107, dividing template; 108, spring pin; 200, drilling mechanism; 201, sliding base; 202, ultrasonic drilling machine; 203, limiting structure; 300, positioning connection mechanism; 301, screw rod; 302, guide member; 400, second base. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0038] Figure 1 is a reference diagram of the use status of a preferred embodiment of the present invention; Figure 2 It is a structural schematic diagram of a preferred embodiment of the present invention; Figure 3 is a bottom schematic diagram of a first base according to a preferred embodiment of the present invention; Figure 4 is a top schematic diagram of a first base of a preferred embodiment of the present invention; Figure 5 It is a partial structural schematic diagram of the positioning connection mechanism of a preferred embodiment of the present invention; Figure 6 is a structural schematic diagram of a drilling mechanism according to a preferred embodiment of the present invention; Figure 7 This is a schematic diagram of a portion of the structure of a rack plate used in an embodiment of the present invention. Figure 1 ; Figure 8 This is a schematic diagram of a portion of the structure of a rack plate used in an embodiment of the present invention. Figure 2 ; Fig. 9 This is a schematic diagram of a partial structure of a graduation template used in an embodiment of the present invention. Figure 1 ; Fig.10 This is a schematic diagram of a partial structure of a graduation template used in an embodiment of the present invention. Figure 2 .

[0039] like Figures 1 to 6As shown, the arc surface drilling auxiliary device of this embodiment, the workpiece is arc-shaped or annular, and the arc surface drilling auxiliary device includes a rolling positioning mechanism, a drilling mechanism 200 and a positioning connection mechanism 300. The rolling positioning mechanism is used to move along the circumference of the workpiece and thereby drive the drilling mechanism 200 to move along the circumference of the workpiece, and is used to lock and fix on the workpiece when moving to a preset circumferential position of the workpiece; the drilling mechanism 200 is connected to the rolling positioning mechanism through the positioning connection mechanism 300, and the positioning connection mechanism 300 is used to adjust the axial position of the drilling mechanism 200 relative to the workpiece; the output end of the drilling mechanism 200 is located on the radial line of the workpiece, and the drilling mechanism 200 is used to perform ultrasonic drilling on the workpiece.

[0040] The axis of the output end of the drilling mechanism 200 is preferably parallel to / coincides with the radial line of the workpiece. In some embodiments, according to different drilling requirements, for example, the hole position has a certain angle, the output end of the drilling mechanism 200 is arranged at a preset angle to the radial line of the workpiece;

[0041] It can be understood that the arc surface drilling auxiliary device is used for drilling radial holes in annular workpieces or arc-shaped workpieces. The rolling positioning mechanism cooperates with the end face and / or arc surface of the workpiece to drive the drilling device to move along the circumference of the workpiece, so that the drilling mechanism 200 moves to a preset circumferential position corresponding to the target hole position on the workpiece, and the rolling positioning mechanism is locked and fixed to the workpiece. When the positioning connection mechanism 300 drives the drilling mechanism 200 to move parallel to the axial direction of the workpiece, during the axial and circumferential movement of the workpiece, the output end of the drilling mechanism 200 always remains on the radial line of the workpiece, that is, when it moves to any target hole position, its output end is always located on the radial line of the workpiece. The output ends are perpendicular to the wall position of the target hole position, so as to realize the drilling of arc surface workpieces with hole distributions of different angles and different hole spacings. The drilling mechanism 200 uses ultrasonic drilling, which effectively improves the drilling efficiency, drilling size accuracy and surface roughness through the ultrasonic high-frequency vibration, improves the hole quality and reduces tool loss. By applying this auxiliary device, there is no need to manually move the drilling tooling multiple times, no need to manually install special positioning pins to lock the drilling tooling, and no need for manual drilling and tapping, which reduces the clamping time, improves production efficiency, and reduces labor intensity. It can be suitable for semi-automatic processing and mass production of arc surface workpieces of different specifications.

[0042] In some embodiments, reference Figures 2 to 4The rolling positioning mechanism includes a first base 100 and a second base 400 which are symmetrically arranged at both ends of the positioning connection mechanism 300. The first base 100 is arranged at a high position. The first base 100 is provided with a first rolling member 101 for cooperating with the wall surface of the workpiece and a second rolling member 103 for cooperating with the preset end surface of the workpiece; the second base 400 is provided with a first rolling member 101 for cooperating with the wall surface of the workpiece, and the second rolling member 103 may also be provided on the second base 400; the first base 100 and the second base 400 are respectively provided with locking mechanisms for cooperating with two opposite end surfaces of the workpiece. It should be noted that the first base 100 can be arranged at the workpiece. The inside or outside or across the inside and outside of the workpiece, that is, the first rolling element 101 of the first base 100 cooperates with the inner wall surface or outer wall surface of the workpiece, and the second rolling element 103 cooperates with the end surface of the workpiece, which end surface can be the outer end surface of the workpiece or the structural end surface of the mounting edge / connecting flange of the workpiece. The actual layout position can be set according to the actual structure of the workpiece; for example, in this embodiment, the workpiece has an inner mounting edge and the first base 100 is arranged on the inner side of the workpiece. The first rolling element 101 of the first base 100 cooperates with the inner wall surface of the workpiece, and the second rolling element 103 cooperates with the outer end surface of the inner mounting edge of the workpiece; that is, when the workpiece has a mounting edge / connecting flange, the auxiliary device is arranged on the workpiece. One side has a mounting edge / connecting flange; in one embodiment, when there is no mounting edge interference on the workpiece, the first base 100 can also be set to a concave structure, that is, the cross-section of the first base 100 is concave, and the width of its groove part matches the thickness of the workpiece, and a second rolling element 103 is arranged at the bottom of the groove to cooperate with the end face of the workpiece, and first rolling elements 101 are respectively arranged on the two inner side walls of the groove to cooperate with the outer wall and the inner wall of the workpiece respectively, so as to realize radial limitation of the rolling positioning structure on the workpiece and limit the rolling positioning structure to move only along the circumferential direction of the workpiece; in this embodiment, the second base 400, the positioning connection mechanism 300 and the drilling mechanism 200 are arranged on the same side of the workpiece, which can be It is the inside or the outside; it can be understood that the rolling positioning mechanism can adapt to arc-surface workpieces of different diameters, and the first rolling member 101 of the first base 100 cooperates with the wall of the workpiece, and the second rolling member 103 cooperates with the upper end surface of the workpiece under the action of gravity to achieve axial and radial limitation. The first positioning member of the second base 400 only assists in radial positioning and will not interfere with the workpiece in the axial direction. It can not only adapt to workpiece sizes of different diameters, but also can adapt to workpieces of a certain height range, and can further be disassembled and replaced by configuring positioning connection mechanisms 300 with different length size ranges, so as to adapt to workpieces of different diameters and heights, effectively avoid customized drilling templates, and greatly reduce costs.

[0043] In some embodiments, reference Figures 2 to 4, counterweight blocks 105 are arranged on both sides of the first base 100. It can be understood that the second rolling element 103 on the first base 100 cooperates with the end face of the workpiece based on the action of gravity, and in some embodiments, it is a one-way limit in the radial direction. Therefore, by setting the counterweight block 105, the auxiliary device can maintain balance during the movement on the workpiece; preferably, the surface of one side of the counterweight block 105 facing the workpiece is set as an arc surface to avoid interference; preferably, a second rolling element 103 can also be set on the counterweight block 105 to increase the cooperation range with the end face of the workpiece, so as to support and move more stably.

[0044] In some embodiments, reference Figure 2 and Figure 6 The drilling mechanism 200 includes an ultrasonic drill 202 and a sliding base 201. The ultrasonic drill 202 is slidably connected to the sliding base 201. The ultrasonic drill 202 is slidably connected to the sliding base 201 so as to move along the axial direction of the ultrasonic drill 202 / the radial direction of the workpiece on the sliding base 201; wherein, the outer wall of the ultrasonic drill 202 is provided with a limiting structure 203 for cooperating with the sliding base 201. The limiting structure 203 is annular and can be selected to be fixed in a position on the ultrasonic drill 202 according to actual needs, thereby controlling the moving range of the ultrasonic drill 202 on the sliding base 201, preferably controlling the maximum drilling distance so that it can match the radial position and depth of the hole of the currently processed workpiece. When the limiting structure 203 abuts against the sliding base 201, the processing is in place, which effectively improves the processing efficiency.

[0045] In some embodiments, reference Figure 2 and Figure 5 The positioning connection mechanism 300 includes at least one screw rod 301 threadedly connected to the drilling mechanism 200, at least one guide member 302 and a driving mechanism for driving the screw rod 301 to rotate, the guide member 302 is used to limit the circumferential rotation of the drilling mechanism 200 when the driving mechanism drives the screw rod 301 to rotate, thereby moving the drilling mechanism 200 along the direction of the screw rod 301; specifically, in this embodiment, two symmetrically arranged guide members 302 are arranged, the guide member 302 is a guide rail, and a limiting groove is arranged on the inner side of the guide rail. Limiting protrusions for cooperating with the limiting groove are arranged on both sides of the drilling mechanism 200, that is, on both sides of the sliding base 201; in other embodiments, the guide member 302 can also be a guide rod penetrated by the sliding base 201. At this time, there is no restriction on the shape of the guide member 302, and it is preferably a round rod or a square rod, so that the corresponding hole positions on the guide member 302 and the sliding base 201 and the guide member itself are easy to process and low in cost.

[0046] In some embodiments, reference Figure 2The rolling positioning mechanism is provided with a first feedback module 102 for feeding back the arc and / or arc length of the rolling positioning mechanism moving relative to the workpiece, and / or the drilling mechanism 200 is provided with a second feedback module for feeding back the axial position of the drilling mechanism 200 relative to the positioning connection mechanism 300; preferably, the first feedback module 102 is a first display module provided on the rolling positioning mechanism, which is connected to the first rolling member 101 of the first base 100, and the arc length of the rolling positioning mechanism moving relative to the workpiece is obtained by detecting the rolling of the first rolling member 101, and the arc size of the movement can be calculated by matching the diameter of the workpiece; the second feedback module can be a second display module provided on the drilling mechanism 200 or on the rolling positioning mechanism, which is connected to the driving mechanism, and converts the axial movement distance of the drilling mechanism 200 according to the number of rotations of the driving mechanism, the thread size specification of the screw rod 301, etc., and displays it through the second display module ; The auxiliary device can also be provided with a control system. When the target hole positions on the workpiece are regularly distributed, the axial position of the drilling mechanism 200 can be set, that is, after the rolling positioning mechanism is fixed at the current circumferential position, the driving mechanism automatically controls the drilling mechanism 200 to reach the axial position of a target hole position. After the current hole position is drilled, the input command drives the drilling mechanism 200 to reach the axial position of the next target hole position through automatic control of the driving mechanism; further, an electric drive mechanism can be provided in the drilling mechanism 200 to control the movement of the ultrasonic drill 202, that is, after the drilling mechanism 200 reaches the axial position of a target hole position, the electric drive mechanism controls the drilling mechanism 200 to drill into a preset depth and then retreat, and automatically controls the drilling mechanism 200 to reach the axial position of the next target hole position and drill again until the drilling of the front hole position at the current circumferential position is completed. The degree of automation is higher, the processing efficiency and hole position accuracy quality are improved, and the labor intensity is reduced.

[0047] In this preferred embodiment, reference Figures 2 to 4 The first rolling element 101 and the second rolling element 103 are both rollers, and are preferably made of a material with a high friction coefficient to prevent slippage from affecting the detection result of the first feedback module 102; in this embodiment, the locking mechanism can be a locking top block 104 arranged on the first base 100 and the second base 400, which is threadedly connected to the corresponding base. After moving into place, the locking top block 104 is tightened so that the locking top blocks 104 at both ends are respectively pressed against the two end surfaces of the workpiece to lock and fix it, which is easy to operate and has a simple structure;

[0048] In one embodiment, reference Figure 7 and Figure 8Alternatively, the first rolling element 101 of the second base 400 is a roller, and the first rolling element 101 of the first base 100 is a gear. The locking mechanism includes a rack plate 106 which is arranged on the inner wall of the workpiece to cooperate with the gear. The rack plate 106 matches the curvature of the workpiece. The coordination between the gear and the rack plate 106 can ensure that the arc length of the matched movement of the first rolling element 101 for each rotation is calculated more accurately, thereby avoiding slippage, interference, etc. that affect the detection result of the first feedback module 102.

[0049] In some embodiments, reference Fig. 9 and Fig.10 The arc surface drilling auxiliary device also includes a dividing template 107 for being set on the inner arc surface or end surface of the workpiece, and the arc length and arc of the dividing template 107 match the workpiece respectively; the dividing template 107 is provided with a positioning structure that matches the circumferential distribution position of the target hole position of the workpiece, and the locking mechanism of this embodiment is used to cooperate with the positioning structure when the rolling positioning mechanism moves to the preset circumferential position corresponding to the target hole position; the dividing template 107 can be an annular plate, and the cross-section can be straight or L-shaped or concave, etc. For example, the straight type and L-shaped can be positioned based on the end face and one side wall of the workpiece, and the concave type can fit the inner and outer wall surfaces and end faces of the workpiece, and there is no restriction on it; this embodiment takes the straight dividing template 107 as an example, and the structure is more streamlined. The positioning structure is a positioning hole opened on the dividing template 107, and a spring is arranged on the rolling positioning mechanism at a matching radial position. The spring pin 108, in a specific embodiment, the spring pin 108 can be arranged on the first base 100; in the non-aligned state, the spring pin 108 abuts against the surface of the dividing template 107 under the action of elastic force, and when the rolling positioning mechanism moves to the circumferential position corresponding to the target hole position, the spring pin 108 extends out under the action of elastic force to be inserted into the positioning hole to achieve positioning, and the drilling mechanism 200 corresponds to the circumferential position of the target hole position; after the drilling is completed, the spring pin 108 is pulled outward to move the rolling positioning mechanism to release the spring pin 108, and the spring pin 108 cooperates with the surface of the dividing template 107 until the rolling positioning mechanism moves to the position of the next positioning hole, which is easier to operate. In this embodiment, there is no need to set the first feedback module 102 for dividing calculation and matching selection, which is particularly suitable for mass production of workpieces. While simplifying the operation, the possibility of causing manual errors is also greatly reduced.

[0050] On the other hand, the preferred embodiment further provides a curved surface drilling method, which is applied with the curved surface drilling auxiliary device of the preferred embodiment above, and the curved surface drilling method comprises:

[0051] S1. Lock and fix the rolling positioning mechanism on the preset starting drilling circumferential position of the workpiece;

[0052] S2. manually controlling the driving mechanism based on the axial position of the drilling mechanism fed back by the second feedback module or controlling the driving mechanism to move the drilling mechanism to a preset axial position with a preset program;

[0053] S3. Start drilling by manually controlling or automatically controlling the drilling mechanism with a preset program;

[0054] S4. After the current drilling is completed, repeat steps S2-S3 until the drilling of holes at each axial position on the current circumferential position of the workpiece is completed;

[0055] S5. Release the locking of the rolling positioning mechanism, and move the rolling positioning mechanism along the circumference of the workpiece to the next preset circumferential position based on the circumferential position of the rolling positioning mechanism fed back by the first feedback module, and repeat steps S2-S4;

[0056] S6. Repeat step S5 until all holes are drilled.

[0057] It can be understood that the rolling positioning mechanism cooperates with the end face and / or arc surface of the workpiece to drive the drilling device to move along the circumference of the workpiece, so that the drilling mechanism moves to the preset circumferential position corresponding to the target hole position on the workpiece, and the rolling positioning mechanism is locked and fixed to the workpiece. When the positioning connection mechanism drives the drilling mechanism to move parallel to the axial direction of the workpiece, during the axial and circumferential movement of the workpiece, the output end of the drilling mechanism always remains located on the radial line of the workpiece, that is, when moving to any target hole position, its output end is perpendicular to the wall position where the target hole position is located, so as to realize the drilling of arc surface workpieces with hole distributions of different angles and different hole spacings. The drilling mechanism uses ultrasonic drilling, and the high-frequency vibration of ultrasound effectively improves the drilling efficiency, drilling size accuracy and surface roughness, improves the hole quality and reduces the tool loss. By applying this auxiliary device, there is no need to manually move the drilling tooling multiple times, no need to manually install special positioning pins to lock the drilling tooling, and no need for manual hand-held drilling and tapping, which reduces the clamping time, improves production efficiency, and reduces labor intensity. It can be suitable for semi-automatic processing and mass production of arc surface workpieces of different specifications.

[0058] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", etc. 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 simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0059] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A curved surface drilling auxiliary device, the workpiece is curved or annular, characterized in that: The arc surface drilling auxiliary device comprises a rolling positioning mechanism, a drilling mechanism (200) and a positioning connection mechanism (300); the rolling positioning mechanism is used to move along the circumference of the workpiece, thereby driving the drilling mechanism (200) to move along the circumference of the workpiece, and is used to lock and fix on the workpiece when moving to a preset circumferential position of the workpiece; the drilling mechanism (200) is connected to the rolling positioning mechanism through the positioning connection mechanism (300); the positioning connection mechanism (300) is used to adjust the axial position of the drilling mechanism (200) relative to the workpiece; the output end of the drilling mechanism (200) is located on the radial line of the workpiece, and the drilling mechanism (200) is used to perform ultrasonic drilling on the workpiece.

2. The arc surface drilling auxiliary device according to claim 1, characterized in that: The rolling positioning mechanism comprises a first base (100) and a second base (400) which are symmetrically arranged at two ends of the positioning connection mechanism (300); the first base (100) is arranged at a high position; the first base (100) is provided with a first rolling member (101) for cooperating with a wall surface of a workpiece and a second rolling member (103) for cooperating with a preset end surface of the workpiece; the second base (400) is provided with a first rolling member (101) for cooperating with a wall surface of the workpiece; the first base (100) and the second base (400) are respectively provided with locking mechanisms for cooperating with two opposite end surfaces of the workpiece.

3. The arc surface drilling auxiliary device according to claim 2, characterized in that: The first rolling element (101) and the second rolling element (103) of the first base (100) are both rollers, or the first rolling element (101) of the first base (100) is a gear, and the locking mechanism includes a rack plate (106) for being arranged on the inner wall of the workpiece to cooperate with the gear, and the rack plate (106) matches the curvature of the workpiece.

4. The arc surface drilling auxiliary device according to claim 2, characterized in that: Counterweight blocks (105) are arranged on both sides of the first base (100).

5. The arc surface drilling auxiliary device according to claim 1, characterized in that: The drilling mechanism (200) comprises an ultrasonic drill (202) and a sliding base (201), wherein the ultrasonic drill (202) is slidably connected to the sliding base (201) so as to move along the axial direction of the ultrasonic drill (202) on the sliding base (201).

6. The arc surface drilling auxiliary device according to claim 5, characterized in that: The outer wall of the ultrasonic drilling machine (202) is provided with a limiting structure (203) for cooperating with the sliding base (201).

7. The arc surface drilling auxiliary device according to claim 1, characterized in that: The positioning connection mechanism (300) comprises at least one screw rod (301) threadedly connected to the drilling mechanism (200), at least one guide member (302), and a driving mechanism for driving the screw rod (301) to rotate, wherein the guide member (302) is used to limit the circumferential rotation of the drilling mechanism (200) when the driving mechanism drives the screw rod (301) to rotate, thereby causing the drilling mechanism (200) to move along the direction of the screw rod (301).

8. The arc surface drilling auxiliary device according to claim 1, characterized in that: The rolling positioning mechanism includes a locking mechanism; the arc surface drilling auxiliary device also includes a dividing template (107) for being arranged on the inner arc surface or end surface of the workpiece, and the arc length and arc of the dividing template (107) are respectively matched with the workpiece; the dividing template (107) is provided with a positioning structure that matches the circumferential distribution position of the target hole position of the workpiece, and the locking mechanism is used to cooperate with the positioning structure when the rolling positioning mechanism moves to a preset circumferential position corresponding to the target hole position.

9. The arc surface drilling auxiliary device according to any one of claims 1 to 8, characterized in that: The rolling positioning mechanism is provided with a first feedback module (102) for feeding back the arc and / or arc length of the rolling positioning mechanism moving relative to the workpiece, and / or the drilling mechanism (200) is provided with a second feedback module for feeding back the axial position of the drilling mechanism (200) relative to the positioning connection mechanism (300).

10. A method for drilling a curved surface, characterized in that: The arc surface drilling auxiliary device according to claim 9 is applied, and the arc surface drilling method comprises: S1. Lock and fix the rolling positioning mechanism on the preset starting drilling circumferential position of the workpiece; S2. manually controlling the driving mechanism based on the axial position of the drilling mechanism fed back by the second feedback module or controlling the driving mechanism to move the drilling mechanism to a preset axial position with a preset program; S3. Start drilling by manually controlling or automatically controlling the drilling mechanism with a preset program; S4. After the current drilling is completed, repeat steps S2-S3 until the drilling of holes at each axial position on the current circumferential position of the workpiece is completed; S5. Release the locking of the rolling positioning mechanism, and move the rolling positioning mechanism along the circumference of the workpiece to the next preset circumferential position based on the circumferential position of the rolling positioning mechanism fed back by the first feedback module, and repeat steps S2-S4; S6. Repeat step S5 until all holes are drilled.

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