Chamfering tool

Abstract

This utility model discloses a chamfering tool in the field of product processing technology. It includes a clamping rod and a chamfering cutter head. Rotation of the clamping rod drives the chamfering cutter head to rotate, used for chamfering bolt holes on parts. A guide rod is provided at the end of the chamfering cutter head away from the clamping rod, and the guide rod can be inserted into the bolt hole. The clamping rod and the chamfering cutter head are detachably connected, and the end of the guide rod is also provided with a cutting part. The cutting part has cutting edges distributed on its outer periphery, and the maximum outer periphery of the cutting part is smaller than that of the guide rod. The detachable connection between the chamfering cutter head and the clamping rod allows for forward chamfering in closed areas, facilitating accurate and efficient chamfering of bolt holes in closed areas, ensuring mass production. Furthermore, the additional cutting part at the end of the guide rod can cut and destroy the sealant inside the bolt hole, facilitating the insertion of the guide rod. The detachable connection allows the clamping rod to be equipped with chamfering cutter heads of different guide rod specifications to correspond to different bolt holes.

Description

Technical Field

[0001] This utility model relates to the field of product processing technology, specifically to a chamfering tool. Background Technology

[0002] In the military and civilian aircraft manufacturing industry, the assembly of some components often results in poor openness in certain areas due to limited product space, such as aircraft cockpits and landing gear bays. Furthermore, the assembly process inevitably involves the use of a large number of flat-head bolts, requiring the mounting holes to be chamfered before installation.

[0003] In existing technologies, due to product structure limitations, such as some I-shaped parts, conventional chamfering heads cannot be used. Instead, reverse chamfering heads are employed, chamfering the part from the back. However, reverse chamfering heads are inconvenient to use, difficult to control the chamfering depth, and have low efficiency, making them unsuitable for mass production. On the other hand, during forward chamfering, the chamfering head has a guide rod at its tip. After the mating surfaces of the parts are sealed, sealant remains in the hole. Since the guide rod at the tip of the chamfering head is a smooth rod, it cannot be directly inserted into the hole. Utility Model Content

[0004] To overcome the inconvenience of chamfering caused by poor local openness of parts and the presence of sealant in holes, this utility model provides a chamfering tool.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] The chamfering tool includes a clamping rod and a chamfering cutter head. The rotation of the clamping rod can drive the chamfering cutter head to rotate, which is used to chamfer bolt holes on parts. The end of the chamfering cutter head away from the clamping rod is provided with a guide rod, which can be inserted into the bolt hole. The clamping rod and the chamfering cutter head are detachably connected, and the end of the guide rod is also provided with a cutting part. The outer periphery of the cutting part is provided with cutting edges, and the maximum outer periphery of the cutting part is smaller than that of the guide rod.

[0007] This application utilizes a detachable connection between the chamfering cutter head and the clamping rod to enable forward chamfering in closed areas, facilitating accurate and efficient chamfering of bolt holes in these areas and providing technical support for mass production. Furthermore, the newly added cutting section at the end of the guide rod can cut and destroy the sealant inside the bolt hole, facilitating guide rod insertion. The detachable connection also allows for the installation of chamfering cutters with different guide rod specifications on a single clamping rod to accommodate various bolt holes.

[0008] In some embodiments, a mating hole is provided at one end of the chamfering cutter head connected to the clamping rod, and a mating shaft section is provided on the clamping rod accordingly. After the mating shaft section and the mating hole are inserted, the rotation of the clamping rod can drive the chamfering cutter head to rotate.

[0009] In some embodiments, the mating hole at one end of the chamfering cutter head connected to the clamping rod is polygonal.

[0010] In some embodiments, a recess is formed in the mating hole of the chamfering cutter head, and a hemispherical protrusion is correspondingly provided on the mating shaft section of the clamping rod. The hemispherical protrusion is configured as an elastic element, and the hemispherical protrusion and the recess cooperate to improve the stability of the assembly connection.

[0011] In some embodiments, both the guide rod and the chamfering tip are made of cemented carbide.

[0012] In some embodiments, the cutting portion is configured to be telescopic, or the guide rod has a first receiving groove inside, and the cutting portion is at least partially movable into the first receiving groove.

[0013] In some embodiments, the guide rod is configured to be telescopic, or the chamfering head has a second receiving groove inside, into which the guide rod is at least partially movable.

[0014] In some embodiments, the outer circumferential dimension of the cutting portion gradually decreases from one end of the connecting guide rod toward the end away from the guide rod.

[0015] The beneficial effects of this utility model are:

[0016] The detachable connection between the chamfering cutter and the clamping rod allows for forward chamfering in closed areas, facilitating accurate and efficient chamfering of bolt holes in these areas and providing technical support for mass production. Furthermore, the added cutting section at the end of the guide rod can cut and break the sealant inside the bolt hole, facilitating guide rod insertion. The detachable connection also allows one clamping rod to be equipped with chamfering cutters of different guide rod specifications to accommodate various bolt holes. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of the chamfering tool provided by this utility model;

[0018] Figure 2 for Figure 1 A diagram illustrating the application scenarios of the chamfering tool.

[0019] The markings in the diagram are: 1. Clamping rod; 2. Chamfering cutter head; 3. Guide rod; 4. Cutting part; 5. Part; 6. Bolt hole. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0022] like Figures 1-2 As shown, this utility model provides a chamfering tool.

[0023] The chamfering tool includes a clamping rod 1 and a chamfering cutter head 2. The rotation of the clamping rod 1 can drive the chamfering cutter head 2 to rotate, which is used to chamfer the bolt holes 6 on the part 5. The chamfering cutter head 2 has a guide rod 3 at the end away from the clamping rod 1, and the guide rod 3 can be inserted into the bolt holes 6.

[0024] The dimensions of the guide rod 3 and the bolt hole 6 are matched to each other, thus playing a guiding and limiting role, which facilitates the determination of the chamfer position and improves the chamfering efficiency and yield.

[0025] The clamping rod 1 and the chamfering cutter head 2 are detachably connected, and the end of the guide rod 3 is also provided with a cutting part 4. The outer periphery of the cutting part 4 is provided with cutting edges, and the maximum outer periphery dimension of the cutting part 4 is smaller than that of the guide rod 3.

[0026] The chamfering head 2 here gradually reduces the outer circumference of the chamfering surface, i.e. the effective cutting surface, from one end of the connecting clamping rod 1 away from the other end of the clamping rod 1 to achieve positive chamfering.

[0027] In this application, the chamfering cutter head 2 and the clamping rod 1 are detachably connected, enabling forward chamfering of closed areas. This facilitates accurate and efficient chamfering of bolt holes 6 in closed areas, providing technical support for mass production. Furthermore, the newly added cutting part 4 at the end of the guide rod 3 can cut and destroy the sealant inside the bolt hole 6, facilitating the insertion of the guide rod 3. The detachable connection allows one clamping rod 1 to be equipped with chamfering cutters 2 of different guide rod 3 specifications to correspond to different bolt holes 6.

[0028] In this embodiment, a mating hole is provided at one end of the chamfering cutter head 2 connected to the clamping rod 1, and a mating shaft section is provided on the clamping rod 1. After the mating shaft section and the mating hole are inserted, the rotation of the clamping rod 1 can drive the chamfering cutter head 2 to rotate.

[0029] The detachable connection between the chamfering cutter head 2 and the clamping rod 1 can take several conventional forms. These are mainly divided into external fastener connections and internal component structure fits. While common external fastener connections, such as bolt connections, set screw connections, and pin connections, are feasible in this application scenario as they do not have excessively high openness requirements, this embodiment preferably adopts an internal component structure fit to achieve a detachable connection for ease of implementation and improved efficiency. Specifically, this involves the mating shaft end and the mating hole insertion.

[0030] Furthermore, to facilitate production, processing, and implementation, the mating hole at one end of the chamfering cutter head 2 connected to the clamping rod 1 is polygonal. In this embodiment, the mating shaft end is a quadrangular prism.

[0031] Furthermore, a recess is formed in the mating hole of the chamfering cutter head 2, and a corresponding hemispherical protrusion is provided on the mating shaft section of the clamping rod 1. The hemispherical protrusion is configured as an elastic element, commonly made of rubber, polyurethane, etc. The hemispherical protrusion and the recess cooperate to improve the stability of the assembly connection, and the cooperation between the hemispherical protrusion and the recess can also provide a certain degree of indication of proper installation.

[0032] In this embodiment, both the guide rod 3 and the chamfering cutter head 2 are made of cemented carbide material, thereby ensuring sufficient strength, improving the overall stability and service life of the device, and improving the chamfering accuracy.

[0033] Furthermore, in this embodiment, the guide rod 3 has a first receiving groove inside, and the cutting part 4 can at least partially move into the first receiving groove. This arrangement allows the length of the chamfering cutter head 2 to be further shortened, thereby adapting to more enclosed environments and improving the applicability of the device.

[0034] For the aforementioned purposes, in some embodiments, the cutting part 4 is configured to be retractable; in some embodiments, the guide rod 3 is configured to be retractable; in some embodiments, the chamfering head 2 has a second receiving groove inside, and the guide rod 3 can at least partially move into the second receiving groove. Obviously, the retractability or movable entry here can be implemented by mechanical structure or by auxiliary electronic signals, both of which are achievable by existing technology and will not be elaborated here.

[0035] In this embodiment, the outer circumference of the cutting section 4 gradually decreases from one end of the connecting guide rod 3 towards the end away from the guide rod 3. This arrangement facilitates the cutting action and downward movement of the cutting section 4.

[0036] In practice, when machining part 5 in a closed area, the chamfering cutter 2 with cutting edge 4 on guide rod 3 is first inserted into the bolt hole 6 that needs chamfering. Since part 5 is sealed, there is sealant inside the bolt hole 6. The cutting edge of cutting edge 4 cuts the sealant, making it easier for guide rod 3 to insert into bolt hole 6. Then, clamping rod 1 is passed through the gap above part 5, and the four-sided prism end of clamping rod 1 is inserted into the mating hole of chamfering cutter 2 to transmit torque. Finally, depending on the actual operating space, the bolt hole 6 is chamfered by hand gripping the tail of clamping rod 1 or by using a pneumatic tool to clamp the tail of clamping rod 1. Chamfering cutters 2 with guide rod 3 of different sizes can be designed according to different bolt hole 6 specifications.

[0037] The chamfering tool provided in this application has at least the following advantages.

[0038] It can accurately, efficiently, and conveniently chamfer bolt holes 6 in closed areas, and can be used for mass production of products, providing technical support for the mass production of aerospace products.

[0039] Compared to reverse chamfering tools, this application is simple to manufacture, low in cost, and highly operable, which can reduce the manufacturing cost of aerospace products and improve economic efficiency.

[0040] The chamfering tool provided in this application is simple, efficient, repeatable, and applicable to a wide range of sizes and scenarios.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A chamfering tool, comprising a clamping rod (1) and a chamfering cutter head (2), wherein the rotation of the clamping rod (1) can drive the chamfering cutter head (2) to rotate, for chamfering the bolt holes (6) on the part (5), wherein the end of the chamfering cutter head (2) away from the clamping rod (1) is provided with a guide rod (3), which can be inserted into the bolt holes (6), characterized in that: The clamping rod (1) and the chamfering cutter head (2) are detachably connected, and the end of the guide rod (3) is also provided with a cutting part (4). The outer periphery of the cutting part (4) is provided with cutting edges, and the maximum outer periphery dimension of the cutting part (4) is smaller than that of the guide rod (3).

2. The chamfering tool as described in claim 1, characterized in that: The chamfering cutter head (2) is connected to the clamping rod (1) at one end with a mating hole. The clamping rod (1) is provided with a mating shaft section. After the mating shaft section and the mating hole are inserted, the clamping rod (1) can rotate to drive the chamfering cutter head (2) to rotate.

3. The chamfering tool as described in claim 2, characterized in that: The mating hole at one end of the chamfering cutter head (2) connected to the clamping rod (1) is in the shape of a polygonal prism.

4. The chamfering tool as described in claim 3, characterized in that: A recess is formed in the mating hole of the chamfering cutter (2), and a hemispherical protrusion is provided on the mating shaft section of the clamping rod (1). The hemispherical protrusion is configured as an elastic element, and the hemispherical protrusion and the recess cooperate to improve the stability of the assembly connection.

5. The chamfering tool as described in claim 1, characterized in that: The guide rod (3) and the chamfering cutter head (2) are both made of cemented carbide.

6. The chamfering tool as described in claim 1, characterized in that: The cutting part (4) is configured to be telescopic, or the guide rod (3) has a first receiving groove inside, and the cutting part (4) is at least partially movable into the first receiving groove.

7. The chamfering tool as described in claim 1, characterized in that: The guide rod (3) is configured to be telescopic, or the chamfering head (2) has a second receiving groove inside, and the guide rod (3) is at least partially movable into the second receiving groove.

8. The chamfering tool as described in any one of claims 1-7, characterized in that: The outer circumferential dimension of the cutting part (4) gradually decreases from one end of the connecting guide rod (3) to the end away from the guide rod (3).

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