Batch drilling tool for half hoops

Abstract

The utility model provides a half-hoop batch drilling tool, which relates to the technical field of aviation machining and comprises a drill bit component and a half-hoop positioning component. The drill bit assembly is meshed with six driven gears through a driving gear to drive a driven shaft to rotate synchronously, and a drill bit is driven to complete multi-hole machining at a time. According to the semi-clamp positioning assembly, a hexagonal groove is adopted to be matched with the shape of a semi-clamp, radial positioning and axial pressing of a workpiece are achieved in combination with a clamp limiting plate and a pressing bolt, and the consistency of the hole pitch is guaranteed. The rigidity of the drill bit assembly is enhanced through a double-layer fixing disc and a lengthening rod fixing frame, and vibration is reduced. By means of gear synchronous transmission, accurate positioning and a stable supporting structure, synchronous and efficient machining of six holes of the semi-hoop is achieved, the hole position accuracy meets the strict requirement of an aero-engine pipeline system, and the semi-hoop machining device is suitable for batch production of similar hoops.

Description

Technical Field

[0001] This utility model relates to the field of aerospace mechanical processing technology, and more specifically, to a semi-clamp batch drilling tool. Background Technology

[0002] In the field of aerospace machining, rigid quick-release clamps are key components in engine piping systems, and their performance directly affects the reliability and safety of pipe connections. These clamps must possess high strength, high precision, and high-temperature resistance, thus imposing extremely stringent requirements on the machining process. The machining of the connecting holes on the clamp's side lugs is particularly challenging. Because the clamp has an arc-shaped structure and strict hole spacing tolerances, traditional machining methods involve drilling a single hole at the end for positioning, followed by rotating the workpiece to machine another hole. However, multiple clamping operations can easily lead to changes in the positioning datum, causing deviations in the hole spacing dimensions and affecting assembly accuracy and product performance. Furthermore, machining hole by hole is inefficient and cannot meet the mass production demands of the aerospace industry.

[0003] While existing tooling technologies can achieve single-hole positioning, they lack the ability to process multiple holes simultaneously, and the positioning structure cannot effectively constrain the radial displacement of the clamp, leading to easy misalignment during processing. Furthermore, traditional clamping devices are not adaptable to irregularly shaped workpieces and struggle to simultaneously achieve axial and radial fixation, further exacerbating processing errors. These problems not only increase rework rates and labor costs but also hinder the overall production efficiency of critical aerospace components.

[0004] Therefore, there is an urgent need to develop a new type of drilling fixture that can solve the core problems of inconsistent hole spacing, low processing efficiency and poor positioning stability in the existing technology through multi-axis synchronous machining, precise positioning structure and integrated clamping design, so as to meet the urgent needs of the aerospace industry for high-precision and high-efficiency machining. Utility Model Content

[0005] To address the aforementioned technical problems, a semi-clamp batch drilling fixture is provided. Through the drill bit assembly and the semi-clamp positioning assembly, multi-axis drill bits can be used to simultaneously process holes, thus solving the problems of hole spacing deviation and low efficiency caused by traditional single-hole processing.

[0006] To achieve the above objectives, this utility model provides a batch drilling fixture for semi-clamps, comprising: a drill bit assembly and a semi-clamp positioning assembly;

[0007] The drill bit assembly includes a drive gear, a connecting spindle, six driven gears and corresponding driven shafts. The drive gear is driven by the connecting spindle and meshes with the six driven gears to rotate synchronously. Each driven gear is equipped with a driven shaft. The upper end of each driven shaft is fixed in the fixed plate by an upper bearing seat, and the bottom end of the driven shaft is connected to the drill bit.

[0008] The semi-clamp positioning assembly includes a chassis, a clamp limiting plate, and clamping bolts. The chassis has a hexagonal groove for accommodating the semi-clamp and achieving radial positioning through its outer contour. The clamp limiting plate is connected to the chassis by clamping bolts. The clamping bolts pass through the fastening holes of the clamp limiting plate to press and fix the semi-clamp. The clamp limiting plate and the drill bit assembly are concentrically installed on the drilling platform, and the hole spacing of the drill bit is consistent with the hole spacing of the semi-clamp to be processed.

[0009] Furthermore, a lower bearing seat is provided between the chassis and the clamp limiting plate, and a bearing is installed in the lower bearing seat to support the lower end of the driven shaft, ensuring that the driven shaft can rotate freely.

[0010] Furthermore, the contour of the hexagonal groove matches the shape of the half clamp, the groove depth is greater than the thickness of the half clamp, and the half clamp is fixed by applying vertical pressure through the clamping bolt.

[0011] Furthermore, the drill bit assembly also includes a drill bit chuck, which is fixed to the bottom end of the driven shaft for holding the drill bit, and the axis of the drill bit coincides with the axis of the hole to be machined of the semi-clamp.

[0012] Furthermore, the connecting spindle is connected to the drive gear via a spray gear seat, which is fixed to the drilling platform. The drive gear and the six driven gears have the same module and number of teeth to ensure synchronous transmission.

[0013] Furthermore, the fixed plate has a double-layer structure, with the upper bearing seat fixed on the upper layer and the lower bearing seat fixed on the lower layer. The two are coaxially arranged, and the fixed plate is rigidly connected to the drilling platform through an extension rod fixing frame.

[0014] Furthermore, the threaded section of the clamping bolt passes through the fastening hole of the clamp limiting plate and extends into the chassis. By tightening the clamping bolt, the clamp limiting plate and the chassis together form axial and radial constraints on the half clamp.

[0015] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0016] 1. The present invention provides a batch drilling fixture for semi-clamps. Through the radial positioning design of the hexagonal groove and the clamp limiting plate, combined with the axial constraint of the clamping bolt, it ensures that the semi-clamp is concentric with the drill bit assembly after being fixed, avoids the reference offset caused by multiple clamping, and makes the hole spacing tolerance strictly meet the requirements, and significantly improves the dimensional stability.

[0017] 2. The present invention provides a semi-clamp batch drilling fixture, which uses an active gear to drive 6 driven gears to rotate synchronously. The multi-axis drill bit assembly completes the processing of 6 through holes at one time. Compared with the traditional single-hole sequential processing, it improves processing efficiency and meets the batch production needs of the aerospace field.

[0018] 3. The present invention provides a semi-clamp batch drilling fixture. The fixture achieves rapid workpiece replacement and continuous processing through chassis quick positioning, integrated fastening of clamping bolts and preset drill bit spacing, reducing repeated clamping and adjustment steps and significantly reducing labor and time costs.

[0019] Based on the above reasons, this utility model can be widely promoted in the field of aerospace mechanical processing technology. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a semi-clamp batch drilling fixture according to the present invention;

[0022] Figure 2 This is a schematic diagram of a multi-axis drill bit assembly for a semi-clamp batch drilling fixture as described in this utility model;

[0023] Figure 3 This is a schematic diagram of a clamp limiting plate for a batch drilling tool with a semi-clamp as described in this utility model;

[0024] Figure 4 This is a schematic diagram of a bearing seat under a semi-clamp batch drilling fixture as described in this utility model;

[0025] Figure 5 This is a schematic diagram of a bearing seat on a semi-clamp batch drilling fixture as described in this utility model;

[0026] Figure 6 This is a schematic diagram of a semi-clamp batch drilling tool extension rod fixing frame according to the present invention;

[0027] Figure 7 This is a schematic diagram of a semi-clamp batch drilling tooling drill chuck according to the present invention;

[0028] Figure 8 This is a schematic diagram of a semi-clamp batch drilling fixture for fixing workpieces according to the present invention;

[0029] Figure 9 This is a schematic diagram of a semi-clamp batch drilling tool gear according to the present invention;

[0030] Figure 10 This is a schematic diagram of a semi-clamp batch drilling fixture connecting a spindle according to the present invention;

[0031] Figure 11 This is a schematic diagram of the driven shaft of a semi-clamp batch drilling fixture according to the present invention;

[0032] Figure 12 This is a schematic diagram of the semi-clamp structure of a batch drilling tool for semi-clamps according to this utility model.

[0033] In the diagram: 1. Clamp limiting plate; 2. Half clamp; 3. Lower bearing seat; 4. Drill bit; 5. Drill bit chuck; 6. Spray gear seat; 7. Driven gear; 8. Driven gear; 9. Upper bearing seat; 10. Connecting spindle; 11. Clamping bolt; 12. Driven shaft. Detailed Implementation

[0034] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0038] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0039] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0040] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0041] like Figures 1 to 12 As shown, this utility model provides a batch drilling fixture for semi-clamps, including: a drill bit assembly and a semi-clamp positioning assembly;

[0042] The drill bit assembly includes a drive gear 8, a connecting spindle 10, six driven gears 7, and corresponding driven shafts 12. The drive gear 8 is driven by the connecting spindle 10 and meshes with the six driven gears 7 to rotate synchronously. Each driven gear 7 is equipped with a driven shaft 12. The upper end of each driven shaft 12 is fixed in a fixed plate by an upper bearing seat 9, and the lower end is supported by a bearing in a lower bearing seat 3 to ensure that the driven shaft 12 can rotate freely. The bottom end of the driven shaft 12 is connected to a drill bit chuck 5 for clamping the drill bit 4. The axis of the drill bit 4 coincides with the axis of the hole to be processed of the semi-clamp 2 to ensure drilling accuracy.

[0043] The semi-clamp positioning assembly includes a chassis, a clamp limiting plate 1, and clamping bolts 11. The chassis has a hexagonal groove whose contour matches the shape of the semi-clamp 2, used to accommodate the semi-clamp 2 and achieve radial positioning through its outer contour. The groove depth is greater than the thickness of the semi-clamp 2. The clamp limiting plate 1 is connected to the chassis by clamping bolts 11. The clamping bolts 11 pass through the fastening holes of the clamp limiting plate 1 to clamp and fix the semi-clamp 2. The clamp limiting plate 1 and the drill bit assembly are concentrically installed on the drilling platform. The hole spacing of the drill bit 4 is consistent with the hole spacing of the semi-clamp 2 to be processed. After the clamping bolts 11 are tightened, the clamp limiting plate 1 and the chassis together form axial and radial constraints on the semi-clamp 2.

[0044] In practical use, the semi-clamp 2 is placed in the hexagonal groove of the chassis, and radial positioning is achieved by using its outer contour; the clamp limiting plate 1 is covered, and vertical pressure is applied by the clamping bolt 11 to fix the semi-clamp 2 in the groove and prevent displacement during processing.

[0045] Start the drilling machine power source, connect the spindle 10 to drive the drive gear 8 to rotate, which in turn drives the six driven gears 7 to rotate synchronously; each driven shaft 12 drives the drill bit 4 to press down synchronously, completing the machining of the six connecting holes of the semi-clamp 2 in one go.

[0046] Loosen the clamping bolt 11, remove the machined half clamp 2, replace with a new workpiece, and repeat the above steps to achieve efficient batch processing.

[0047] Furthermore, a lower bearing seat 3 is provided between the chassis and the clamp limiting plate 1. A bearing is installed in the lower bearing seat 3 to support the lower end of the driven shaft 12, ensuring that the driven shaft 12 can rotate freely. The lower bearing seat 3 between the chassis and the clamp limiting plate 1 provides stable support for the lower end of the driven shaft 12, reducing the vibration and wobble of the driven shaft 12 during drilling, enhancing the stability of the drill bit 4, thereby improving the hole position accuracy and the service life of the tooling.

[0048] Furthermore, the contour of the hexagonal groove matches the shape of the semi-clamp 2, the groove depth is greater than the thickness of the semi-clamp 2, and the semi-clamp 2 is fixed by applying vertical pressure through the clamping bolt 11, so that the semi-clamp 2 is completely embedded in the groove and fixed by the clamping plate 1, avoiding workpiece displacement or warping during processing, and ensuring absolute stability of positioning during processing.

[0049] Furthermore, the drill bit assembly also includes a drill bit chuck 5, which is fixed to the bottom end of the driven shaft 12 and is used to clamp the drill bit 4. The axis of the drill bit 4 coincides with the axis of the hole to be processed of the semi-clamp 2, eliminating the hole position offset caused by the drill bit installation deviation and ensuring that the positional accuracy of each hole meets the design requirements.

[0050] Furthermore, the connecting spindle 10 is connected to the drive gear 8 via the spray gear seat 6. The spray gear seat 6 is fixed to the drilling platform. The drive gear 8 and the six driven gears 7 have the same module and number of teeth to ensure synchronous transmission, avoid the difference in rotational speed of each drill bit 4 due to transmission error, and ensure the processing consistency of all holes.

[0051] Furthermore, the fixed plate has a double-layer structure, with the upper bearing seat 9 fixed on the upper layer and the lower bearing seat 3 fixed on the lower layer. The two are coaxially arranged, and the fixed plate is rigidly connected to the drilling platform through an extension rod fixing frame, which enhances the overall rigidity of the drill bit assembly, effectively suppresses vibration and deformation during the drilling process, and further improves processing stability and hole position accuracy.

[0052] Furthermore, the threaded section of the clamping bolt 11 passes through the fastening hole of the clamp limiting plate 1 and extends into the chassis. By tightening the clamping bolt 11, the clamp limiting plate 1 and the chassis together form axial and radial constraints on the half clamp 2, completely eliminating the risk of minor displacement of the workpiece during the drilling process and ensuring that the machining positions of all holes are completely consistent.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A semi-harness bulk drilling tooling, characterized by, The application relates to a drill bit assembly and a half-clamp positioning assembly. The drill bit assembly comprises a driving gear (8), a connecting main shaft (10), six driven gears (7) and corresponding driven shafts (12), the driving gear (8) is driven by the connecting main shaft (10) and meshes with the six driven gears (7) to drive the six driven gears (7) to rotate synchronously, each driven gear (7) is provided with a driven shaft (12), the upper end of each driven shaft (12) is fixed in a fixing disc through an upper bearing seat (9), and the bottom end of the driven shaft (12) is connected with a drill bit (4). The half-clamp positioning assembly comprises a bottom disc, a clamp limiting plate (1) and a pressing bolt (11), the bottom disc is provided with a hexagonal groove for accommodating the half-clamp (2) and realizing radial positioning through the outer contour of the half-clamp (2), the clamp limiting plate (1) is connected with the bottom disc through the pressing bolt (11), the pressing bolt (11) penetrates through the fastening hole of the clamp limiting plate (1) to press and fix the half-clamp (2), and the clamp limiting plate (1) is concentrically arranged on the drill bed platform with the drill bit assembly, and the hole spacing of the drill bit (4) is consistent with the hole spacing of the half-clamp (2) to be machined. A lower bearing seat (3) is arranged between the bottom disc and the clamp limiting plate (1), bearings are arranged in the lower bearing seat (3) to support the lower end of the driven shaft (12), and the free rotation of the driven shaft (12) is ensured.

2. The half-harness bulk drilling tool according to claim 1, wherein, The contour of the hexagonal groove is matched with the outer shape of the half-clamp (2), the groove depth is greater than the thickness of the half-clamp (2), and the half-clamp (2) is fixed through the vertical pressure of the pressing bolt (11).

3. The half-harness bulk drilling tool of claim 1, wherein, The drill bit assembly further comprises a drill bit clamping jaw (5) fixed to the bottom end of the driven shaft (12) for clamping the drill bit (4), and the axis of the drill bit (4) is coincident with the axis of the hole to be machined of the half-clamp (2).

4. The half-harness bulk drilling tool of claim 1, wherein, The connecting main shaft (10) is connected with the driving gear (8) through a spray gear seat (6), the spray gear seat (6) is fixed to the drill bed platform, the modulus and the number of teeth of the driving gear (8) are consistent with those of the six driven gears (7), and synchronous transmission is ensured.

5. The half-harness bulk drilling tool of claim 1, wherein, The fixing disc is a double-layer structure, the upper layer fixes the upper bearing seat (9), the lower layer fixes the lower bearing seat (3), the two are coaxially arranged, and the fixing disc is rigidly connected with the drill bed platform through a lengthened rod fixing frame.

6. The half-harness bulk drilling tool of claim 1, wherein, The threaded section of the pressing bolt (11) penetrates through the fastening hole of the clamp limiting plate (1) and extends to the inside of the bottom disc, the clamp limiting plate (1) and the bottom disc jointly form axial and radial constraints on the half-clamp (2) by rotating the pressing bolt (11).

7. The half-harness bulk drilling tool of claim 1, wherein, ​

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