Combined tool suitable for small-area counter boring machining

Abstract

The utility model provides a combined tool suitable for small-area counter boring machining, which can realize high-standard and high-efficiency counter boring machining of parts with different types and shapes, the combined tool comprises a foundation plate, a conversion plate, a positioning guide sleeve, a cutter bar and a cutting cutterhead, and the foundation plate is provided with a fixed guide hole and an adjustable guide hole; the upper surface of the conversion plate is attached to and fixedly connected with the bottom surface of the foundation plate, the shape of the bottom surface of the conversion plate is matched with the surface of a part, and the conversion plate is provided with a first guide hole and a second guide hole which are matched with the fixed guide hole and the adjustable guide hole in position and size respectively; the positioning guide sleeve is inserted from the fixed guide hole or the adjustable guide hole, and the positioning guide sleeve is assembled into the fixed guide hole and the first guide hole or the adjustable guide hole and the second guide hole; the cutter bar is inserted into the positioning guide sleeve, and the two ends of the cutter bar penetrate out of the two ends of the positioning guide sleeve respectively. And the cutting cutterhead is placed from the countersinking fisheye pit of the part and is connected to the lower part of the cutter bar.

Description

Technical Field

[0001] The utility model relates to the field of aircraft part processing, and more specifically, to a combined tooling suitable for counterboring in a small area. Background Art

[0002] In the existing production process of aircraft parts, counterbored flat-bottomed holes in small areas of aluminum alloy parts are increasingly widely used. However, due to the small area, normal machining cannot be completed using traditional machining methods, and fitters need to use counterboring drills for individual machining. Since this type of hole has characteristics such as a variety of types, small batches, and multiple specifications, the auxiliary drill jigs used for each part are different and cannot be interchanged, so a large amount of manufacturing cost and raw material cost are consumed, and the machining efficiency is relatively low. Content of the Utility Model

[0003] The purpose of the utility model is to provide a combined tooling suitable for counterboring in a small area, which can realize counterboring of different types and shapes of parts by replacing different conversion plates; it can use the hole positions of the parts themselves and combine with the combined tooling for precise positioning. The outer diameter of the designed positioning sleeve is precisely matched with the part hole, and the inner hole is matched with the cutting tool shank to ensure the accuracy of each part; machining of different angles, positions, and parts can be achieved by adjusting the positioning guide sleeve, realizing rapid replacement of the conversion plate, and saving a large amount of clamping and debugging time.

[0004] The embodiments of the utility model are implemented as follows:

[0005] A combined tooling suitable for counterboring in a small area, the combined tooling includes: a base plate, a conversion plate, a positioning guide sleeve, a tool shank, and a cutting tool disc. Fixed guide holes and adjustable guide holes are provided on the base plate; the upper surface of the conversion plate is attached to and fixedly connected to the bottom surface of the base plate, and the bottom surface shape of the conversion plate matches the surface of the part. The conversion plate is provided with a first guide hole and a second guide hole that respectively match the positions and sizes of the fixed guide hole and the adjustable guide hole; the positioning guide sleeve is inserted from the fixed guide hole or the adjustable guide hole, and the positioning guide sleeve is assembled into the fixed guide hole and the first guide hole or assembled into the adjustable guide hole and the second guide hole; the tool shank is inserted into the positioning guide sleeve, and both ends of the tool shank respectively extend out of both ends of the positioning guide sleeve; the cutting tool disc is placed into the counterbored fish-eye pit of the part from the bottom and connected to the lower part of the tool shank.

[0006] In a preferred embodiment of the utility model, the above-mentioned positioning guide sleeve includes a cylindrical positioning table and a cylindrical guide sleeve. A first through hole for the tool shank to pass through is provided in the middle of the cylindrical positioning table, and a sunken plane is provided on the upper surface of the cylindrical positioning table; the cylindrical guide sleeve and the cylindrical positioning table are coaxial, a second through hole with the same size as the first through hole is provided in the cylindrical guide sleeve, and the diameter of the cylindrical guide sleeve is smaller than the diameter of the cylindrical positioning table.

[0007] In a preferred embodiment of the present utility model, the adjustable guiding hole is a strip-shaped through hole with an arc-shaped end. The adjustable guiding hole is provided with a first guiding groove for assembling the cylindrical positioning table and a second guiding hole for the cylindrical guiding sleeve to pass through.

[0008] In a preferred embodiment of the present utility model, the depth of the first guiding groove = the height of the cylindrical positioning table - the height of the sinking plane.

[0009] In a preferred embodiment of the present utility model, the combined tooling further includes a pressing ring. The bottom surface of the pressing ring is partially pressed on the sinking plane, and the pressing ring is assembled on the connecting hole through an internal hexagonal screw.

[0010] In a preferred embodiment of the present utility model, the pressing ring is a strip-shaped block with an arc-shaped end, and a strip-shaped hollow with an arc-shaped end is arranged inside the pressing ring.

[0011] In a preferred embodiment of the present utility model, the upper part of the tool shank is connected to an electric or pneumatic power device.

[0012] In a preferred embodiment of the present utility model, two sets of the positioning guiding sleeve, the tool shank, and the cutting tool disc are provided, and are respectively arranged at the corresponding hole positions of the fixed guiding hole and the adjustable guiding hole.

[0013] In a preferred embodiment of the present utility model, a plurality of connecting holes arranged in a straight line are provided on the base plate, and a plurality of counterbores matching the positions and sizes of the connecting holes are provided on the conversion plate. The number of counterbores ≤ the number of connecting holes; the combined tooling further includes internal hexagonal screws for fixedly connecting the base plate and the conversion plate, and the internal hexagonal screws are hidden in the counterbores.

[0014] The beneficial effects of the embodiments of the present utility model are as follows:

[0015] 1. The split-type tooling composed of the base plate and the conversion plate can realize countersinking processing by replacing the conversion plates with different bottom surfaces for different types of parts with small-area countersinking, reducing the production of special tooling and improving production efficiency;

[0016] 2. In addition to assembling the tool shank, the positioning guiding sleeve of the tooling is also used for the precise assembly between the base plate and the conversion plate, so as to realize the sharing of different specifications and types of parts, ensure the machining accuracy of the parts, improve the qualification rate of the parts, and thus realize the efficient machining of multi-specification parts;

[0017] 3. The base plate is provided with adjustable guiding holes, which can be adjusted according to the countersinking holes to be processed at different positions, so as to meet the countersinking processing operations with multiple spacings. Description of the Drawings

[0018] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of the assembly structure of the combined tooling for the embodiments of the present utility model;

[0020] Figure 2 Schematic diagram of the exploded structure of the disassembled combined tooling for the embodiments of the present utility model;

[0021] Figure 3 Schematic diagram of the structure of the combined tooling for the embodiments of the present utility model;

[0022] Icons: base plate 110; fixed guide hole 111; adjustable guide hole 112; first guide groove 1121; second guide hole 1122; conversion plate 120; counterbore 121; positioning guide sleeve 130; cylindrical positioning table 131; cylindrical guide sleeve 132; sinking plane 133; tool shank 140; cutting tool disc 150; compression ring 160; hexagon socket head screw 170; countersunk reverse fish-eye pit 001; part 002. Detailed implementation manners

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0025] It should be noted that: similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0027] In addition, terms such as "horizontal", "vertical", "hanging" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0028] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] First Embodiment

[0030] This embodiment aims at the deficiencies existing in the current countersinking processing and provides a combined tooling suitable for small-area countersinking processing. Please refer to Figures 1-3 , the combined tooling includes a base plate 110, a conversion plate 120 detachably connected to the base plate 110, a positioning guide sleeve 130, a tool shank 140, and a cutting tool disc 150.

[0031] The advantages of this combined tooling are as follows: strong interchangeability, simple assembly and debugging; it can achieve rapid and accurate mutual switching between a base plate 110 of a set of tooling and multiple parts 002; the replacement of different parts 002 does not require cumbersome tooling debugging and alignment, effectively improving the utilization rate of the machine tool; it can reduce the manufacturing and processing costs, reduce the defective rate of part 002 processing, and improve the production efficiency; it provides multiple efficient solutions for the processing of small-batch and multi-specification parts 002, etc.

[0032] The base plate 110 is a standard rectangular steel block. A fixed guide hole 111 and an adjustable guide hole 112 are provided on the base plate 110 for assembling and positioning the guide sleeve 130. The positions and quantities of the fixed guide hole 111 and the adjustable guide hole 112 are determined according to the positions of the countersunk holes to be machined.

[0033] Specifically, the positioning guide sleeve 130 is a steel guide sleeve, which includes a cylindrical positioning table 131 and a cylindrical guide sleeve 132. A first through hole for the tool bar 140 to pass through is provided in the middle of the cylindrical positioning table 131, and a sunken plane 133 is provided on the upper surface of the cylindrical positioning table 131; the cylindrical guide sleeve 132 and the cylindrical positioning table 131 are coaxial, and a second through hole with the same size as the first through hole is provided in the cylindrical guide sleeve 132. The diameter of the cylindrical guide sleeve 132 is smaller than the diameter of the cylindrical positioning table 131.

[0034] Correspondingly, the shape of the fixed guide hole 111 matches the shape of the positioning guide sleeve 130. It includes a first cylindrical groove and a second cylindrical hole that is coaxial with and penetrates the first cylindrical groove. When assembling the positioning guide sleeve 130 in the fixed guide hole 111, the cylindrical positioning table 131 is assembled in the first cylindrical groove, and the cylindrical guide sleeve 132 is assembled in the second cylindrical hole. And the depth of the first cylindrical groove = the height of the cylindrical positioning table 131 - the height of the sunken plane 133, so that the sunken plane 133 of the assembled positioning guide sleeve 130 is flush with the plane of the base plate 110.

[0035] The adjustable guide hole 112 is a strip-shaped through hole with an arc-shaped end. The adjustable guide hole 112 is provided with a first guide groove 1121 for the cylindrical positioning table 131 to be assembled and a second guide hole 1122 for the cylindrical guide sleeve 132 to pass through. One hole of the guide hole is a standard round hole, and one hole is a waist-shaped hole. By adjusting the position of the tool on the adjustable guide hole 112, the adjustment of the countersunk holes with different spacings can be realized, and the versatility of the base plate 110 can be achieved.

[0036] Similarly, the depth of the first guide groove 1121 = the height of the cylindrical positioning table 131 - the height of the sunken plane 133, so that when the positioning guide sleeve 130 is assembled in the adjustable guide hole 112, the sunken plane 133 of the positioning guide sleeve 130 is flush with the base plate 110. The adjustable guide hole 112 is set to be strip-shaped, so that when encountering two countersunk holes with different specifications to be machined, the tool at the position of the adjustable guide hole 112 can be adjusted to realize the machining of different countersunk holes.

[0037] The upper surface of the conversion plate 120 is attached to and fixedly connected to the bottom surface of the base plate 110, and the shape of the bottom surface of the conversion plate 120 matches the surface of the part 002. The shape of the bottom surface in this embodiment is not limited and can be a standard shape or a special shape. For example, in this embodiment, the bottom surface of the conversion plate 120 is provided with a flat surface and a protruding arc surface, and one of the counterbore holes to be machined is located on the flat surface, and the other counterbore hole to be machined is maintained on the arc surface.

[0038] The conversion plate 120 is provided with a first guide hole and a second guide hole 1122 that respectively match the positions and sizes of the fixed guide hole 111 and the adjustable guide hole 112. The length of the cylindrical guide sleeve 132 of the positioning guide sleeve 130 is shorter than the length of the first guide hole or the second guide hole 1122 to prevent the positioning guide sleeve 130 from passing through to the outside of the conversion plate 120. Only the tool shank 140 passes through to the conversion plate 120 to connect the cutting tool disc 150.

[0039] In this embodiment, conversion plates 120 of different specifications can be selected according to different parts 002. The guide holes on the conversion plate 120 cooperate with the positioning guide sleeves 130.

[0040] The conversion plate 120 can also be provided with additional positioning pin holes. Through the positioning pin holes of the conversion plate 120, corresponding second positioning pin holes that match the positions and sizes of the positioning pin holes can also be provided on the corresponding base plate 110. Thus, when a positioning pin is inserted into the positioning pin holes, the position accuracy of the positioning guide sleeve 130 can be controlled to achieve rapid assembly.

[0041] In this embodiment, due to the existence of the fixed guide hole 111, the use of the positioning guide sleeve 130 can also achieve the purpose of rapid assembly. Therefore, positioning pin holes are not provided in this embodiment.

[0042] The number of the positioning guide sleeves 130, the tool shanks 140, and the cutting tool discs 150 is determined according to the number and positions of the counterbore holes to be machined. In use, when only the fixed guide hole 111 or both the fixed guide hole 111 and the adjustable guide hole 112 are used for machining, the positioning guide sleeve 130 is inserted from the fixed guide hole 111 or the adjustable guide hole 112, and the positioning guide sleeve 130 is assembled into the fixed guide hole 111 and the first guide hole or assembled into the adjustable guide hole 112 and the second guide hole 1122. In this embodiment, two sets of the positioning guide sleeves 130, the tool shanks 140, and the cutting tool discs 150 are provided, and are respectively arranged at the corresponding hole positions of the fixed guide hole 111 and the adjustable guide hole 112.

[0043] Specifically, the pressing ring 160 is a strip-shaped block with an arc-shaped end. The pressing ring 160 is a steel block. There is a strip-shaped hollow with an arc-shaped end inside the pressing ring 160 for the cylindrical guide sleeve 132 to pass through. The bottom surface part of the pressing ring 160 is pressed on the sinking plane 133, and the pressing ring 160 is fixedly assembled on the connection hole through the socket head cap screw 170.

[0044] The assembly method of the tool is as follows: Insert the tool shank 140 into the positioning guide sleeve 130, and both ends of the tool shank 140 extend out of both ends of the positioning guide sleeve 130 respectively; The cutting tool disc 150 is placed into the counterbored reverse fish-eye pit 001 of the part 002 and connected to the lower part of the tool shank 140, so as to fix the combined tooling on the part 002 by using the counterbored reverse fish-eye pit 001 existing in the part 002 itself; Then use the pressing ring 160 to further press the positioning guide sleeve 130 on the fixed guide hole 111 and / or the adjustable guide hole 112. After clamping, the upper part of the tool shank 140 is connected to an electric or pneumatic power device, and then the processing process is carried out.

[0045] In order to fasten the base plate 110 and the conversion plate 120, a plurality of connection holes arranged in a straight line are provided on the base plate 110. For example, a total of 5 connection holes are provided in this embodiment. One of the connection holes is arranged at the position of the fixed guide hole 111. After assembling the socket head cap screw 170, the positioning guide sleeve 130 at the position of the fixed guide hole 111 is clamped and fixed; The other 4 are arranged in a row and equidistantly arranged beside the adjustable guide hole 112, and are fastened by two hexagon socket head cap screws, and the positions of the two hexagon socket head cap screws can be replaced, so as to adjust the pressing position and force of the positioning guide sleeve 130 when the tool position on the adjustable guide hole 112 needs to be changed.

[0046] The bottom surface of the conversion plate 120 is provided with a plurality of counterbored holes 121 that match the position and size of the connection holes. The number of counterbored holes 121 ≤ the number of connection holes; The combined tooling further includes socket head cap screws 170 for fixedly connecting the base plate 110 and the conversion plate 120. The socket head cap screws 170 are hidden in the counterbored holes 121, so that there is no interference on the bottom surface of the conversion plate 120 in contact with the part 002.

[0047] The usage method of the combined tooling is as follows:

[0048] Select a suitable conversion plate 120, insert the positioning guide sleeve 130 into the fixed guide hole 111, and quickly position the base plate 110 and the conversion plate 120;

[0049] Assemble the socket head cap screw 170 at the position of the fixed guide hole 111 to fix the base plate 110 and the conversion plate 120;

[0050] Insert the positioning guide sleeve 130 into the adjustment guide hole, insert and pass the tool bar 140 through the part 002, quickly adjust the position of the positioning guide sleeve 130, adjust the pressing point of the socket head cap screw 170, press the pressing ring 160 against the positioning guide sleeve 130, and lock the socket head cap screw 170;

[0051] Place the cutting tool disk 150 into the counterbored reverse fish-eye pit 001 of the part 002 and connect it to the lower part of the tool bar 140.

[0052] In summary, the advantages of the combined tooling for small-area counterboring in this embodiment are as follows:

[0053] 1. The split tooling composed of the base plate 110 and the conversion plate 120 can be used for counterboring of different types of parts 002 with small-area counterboring by replacing the conversion plate 120 with different bottom surfaces, reducing the production of special tooling and improving production efficiency;

[0054] 2. In addition to assembling the tool bar 140, the positioning guide sleeve 130 of the tooling is also used for precise assembly between the base plate 110 and the conversion plate 120, so that different specifications and types of parts 002 can be shared, ensuring the machining accuracy of the parts 002, improving the qualified rate of the parts 002, and thus enabling efficient machining of multi-specification parts 002;

[0055] 3. The adjustable guide hole 112 is provided on the base plate 110, and its position can be adjusted according to the counterbored holes to be machined at different positions, so as to meet the counterboring machining operations with multiple spacings.

[0056] This specification describes examples of embodiments of the present invention, and does not mean that these embodiments illustrate and describe all possible forms of the present invention. It should be understood that the embodiments in the specification can be implemented in various alternative forms. The drawings do not need to be drawn to scale; some features can be enlarged or reduced to show details of specific components. The specific structural and functional details disclosed should not be construed as limiting, but merely as a representative basis for teaching those skilled in the art to implement the present invention in various forms. Those skilled in the art should understand that the multiple features described and illustrated with reference to any one of the drawings can be combined with the features illustrated in one or more other drawings to form embodiments not explicitly illustrated or described. The described combined features provide representative embodiments for typical applications. However, various combinations and variations of the features consistent with the teachings of the present invention can be used for specific applications or implementations as needed.

[0057] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. 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 combined tooling suitable for small area countersinking, characterized in that: The combined tooling comprises: A base plate, wherein the base plate is provided with a fixed guide hole and an adjustable guide hole; A conversion plate, the upper surface of which is attached to and fixedly connected with the bottom surface of the base plate, the bottom surface shape of which matches the surface of the part, and the conversion plate is provided with a first guide hole and a second guide hole which respectively match the position and size of the fixed guide hole and the adjustable guide hole; A positioning guide sleeve, the positioning guide sleeve is inserted from the fixed guide hole or the adjustable guide hole, and the positioning guide sleeve is assembled into the fixed guide hole and the first guide hole or assembled into the adjustable guide hole and the second guide hole; A knife rod, the knife rod is inserted into the positioning guide sleeve, and two ends of the knife rod are respectively passed through two ends of the positioning guide sleeve; A cutting disc is placed into the countersunk fisheye pit of the part and connected to the lower part of the cutter bar.

2. The combined tooling for small area countersinking according to claim 1 is characterized in that: The positioning guide sleeve comprises: A cylindrical positioning platform, wherein a first through hole for the knife rod to pass through is provided in the middle of the cylindrical positioning platform, and a sinking plane is provided on the upper surface of the cylindrical positioning platform; A cylindrical guide sleeve, wherein the cylindrical guide sleeve and the cylindrical positioning platform have the same central axis, a second through hole having the same size as the first through hole is arranged in the cylindrical guide sleeve, and the diameter of the cylindrical guide sleeve is smaller than the diameter of the cylindrical positioning platform.

3. The combined tooling for small area countersinking according to claim 2 is characterized in that: The adjustable guide hole is a strip-shaped through hole with an arc-shaped end. The adjustable guide hole is provided with a first guide groove for assembling the cylindrical positioning table and a second guide hole for passing the cylindrical guide sleeve.

4. The combined tooling for small area countersinking according to claim 3 is characterized in that: The groove depth of the first guide groove = the height of the cylindrical positioning platform - the height of the sinking plane.

5. The combined tooling for small area countersinking according to claim 4 is characterized in that: The combined tooling also includes a clamping ring, the bottom surface of which is pressed on the sunken plane, and the clamping ring is assembled on the connecting hole by means of a hexagon socket screw.

6. The combined tooling for small area countersinking according to claim 5, characterized in that: The clamping ring is a strip-shaped block with an arc-shaped end, and a strip-shaped hollow with an arc-shaped end is arranged inside the clamping ring.

7. The combined tooling for small area countersinking according to any one of claims 1 to 6, characterized in that: The upper part of the knife rod is connected with an electric or pneumatic power device.

8. The combined tooling for small area countersinking according to any one of claims 1 to 6, characterized in that: The positioning guide sleeve, the tool rod and the cutting disc are provided with two sets in total, and are respectively arranged on the hole positions corresponding to the fixed guide hole and the adjustable guide hole.

9. The combined tooling for small area countersinking according to any one of claims 1 to 6, characterized in that: The base plate is provided with a plurality of connecting holes arranged in a straight line, and the conversion plate is provided with a plurality of countersunk holes matching the positions and sizes of the connecting holes, and the number of the countersunk holes is ≤ the number of the connecting holes; the combined tooling also includes hexagon socket screws for fixing the base plate and the conversion plate, and the hexagon socket screws are hidden in the countersunk holes.

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