Drilling depth adjusting device

Abstract

The utility model belongs to the technical field of aviation assembly, and relates to a drilling depth adjusting device. Comprising a straight shank auger bit (1), a depth limiting sleeve (2) and a locking nut (3). The drilling depth is controlled by controlling the working length of the drill bit, and the device can be widely applied to blind hole drilling and the situation that the drilling depth needs to be strictly controlled. The device is simple in structure, low in cost and easy to operate. And the drilling depth can be controlled through the simple device. And the quality problem of part damage caused by overlong drilling of the drill bit is effectively avoided. The device is simple in structure, high in universality and capable of being suitable for various drilling scenes.

Description

Technical Field

[0001] The utility model belongs to the technical field of aviation assembly, and relates to a drilling depth adjusting device. By controlling the working length of the drill bit, the control of the drilling depth can be realized, and it can be widely applied to the cases of blind hole drilling and the situations where the drilling depth needs to be strictly controlled. Background Technique

[0002] When drilling holes with a straight shank twist drill in machining, the three-jaw drill chuck is usually used to hold the straight shank of the twist drill to directly drill holes in the part. As a general tool, the drill bit is generally long in size to meet the drilling requirements of parts with various thicknesses. Whether it is manual hole drilling or drilling with equipment such as a bench drill, the drilling is almost "going straight in". The drilling depth is controlled by manual experience and continuous dimensional measurement. In some special structures, if the drill bit drills through the interlayer too long, it will damage the next layer of parts, resulting in quality problems. In such cases, when drilling, the operator needs to be very careful to control the drilling length of the drill bit according to experience to prevent damage to the parts, which requires a high skill level of the worker and low drilling efficiency. In necessary cases, a backing plate is used for protection or another operator is arranged to observe on the other side to assist in hole making to prevent damage to the parts, resulting in waste of human resources. Therefore, seeking a reliable method for controlling the drilling depth is of great significance for improving the hole making efficiency and reducing quality problems. Content of the Utility Model

[0003] Purpose of the Utility Model

[0004] The utility model overcomes the deficiency that the straight shank twist drill in the prior art is not easy to control the drilling depth, and provides an auxiliary drilling device for controlling the drilling depth with simple structure, low cost and simple operation. It can reliably control the drilling depth, improve the drilling efficiency and reduce the occurrence of quality problems.

[0005] Technical Solution

[0006] A drilling depth adjustment device, as shown in the figure, the drilling depth adjustment device includes a straight shank twist drill bit (1), a depth limit sleeve (2), and a locking nut (3). The depth limit sleeve (2) is a stepped cylindrical structure, the large stepped end is the first hexagon head (2-3), and the small stepped end is a tapered external thread (2-2). The tapered external thread (2-2) is integrally formed with the first hexagon head (2-3). The tapered external thread (2-2) is divided into three parts in the circumferential direction, and a shrinkage groove (2-1) is provided between adjacent parts. The locking nut (3) includes a tapered internal thread (3-1) and a second hexagon head (3-2). The tapered external thread (2-2) of the depth limit sleeve (2) and the tapered internal thread (3-1) of the locking nut (3) are coordinated in specification. During use, the depth limit sleeve (2) and the locking nut (3) pass through the straight shank twist drill bit (1), and the depth limit sleeve (2) is tightened at the set position, and the shrinkage groove (2-1) fits the straight shank twist drill bit (1) under the tightening force to achieve fixation.

[0007] Further, the first hexagon head (2-3) and the second hexagon head (3-2) are replaced with square heads, and both can be tightened with an open-end wrench.

[0008] Further, the depth limit sleeve (2) and the locking nut (3) are both made of 45 steel.

[0009] Further, the width of the shrinkage groove (2-1) is 1 mm - 2 mm.

[0010] Further, the height of the shrinkage groove (2-1) should be greater than the height of the locking nut (3) so that the depth limit sleeve (2) and the locking nut (3) are fully locked and not easily loosened.

[0011] Further, the taper of the shrinkage groove (2-1) is 10° - 15°. It is easier to achieve clamping. The beneficial effects of this application are as follows:

[0012] ① This drilling depth adjustment device has a simple structure, low cost, easy to operate, and strong versatility. It can be applied to a variety of drilling scenarios and can reliably control the drilling depth;

[0013] ② This drilling depth adjustment device reduces the difficulty of drilling operations, changes the operation method of controlling the drilling depth relying on the skill level of workers, and relies on the tooling device to control the drilling depth, improving the drilling efficiency.

[0014] In summary, the present invention provides a drilling depth adjustment device, which has the advantages of simple structure, low cost, and easy to operate. The control of the drilling depth can be achieved through a simple device. It effectively avoids the occurrence of quality problems such as part damage caused by the drill bit drilling too long. Moreover, the device of the present invention has a simple structure and strong versatility, and can be applied to a variety of drilling scenarios. Brief Description of the Drawings

[0015] Figure 1 is a three - dimensional axial view of the structural configuration of the present utility model;

[0016] Figure 2 is a top view of the structural configuration of the present utility model;

[0017] Figure 3 is an axial view of the depth - limiting sleeve (2) of the present utility model;

[0018] Figure 4 is a front view of the depth - limiting sleeve (2) of the present utility model;

[0019] Figure 5 is a top view of the depth - limiting sleeve (2) of the present utility model;

[0020] Figure 6 is an axial view of the locking nut (3) of the present utility model;

[0021] Figure 7 is a cross - sectional view of the locking nut (3) of the present utility model;

[0022] Among them: The depth - limiting sleeve 2 includes a shrinkage groove 2 - 1, a tapered external thread 2 - 2, and a first hexagonal head 2 - 3. The locking nut 3 includes a tapered internal thread 3 - 1 and a second hexagonal head 3 - 2. Detailed Embodiment

[0023] The present utility model will be further described below in conjunction with embodiments. The following only describes a part of the embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0024] The technical solution for the present utility model to achieve the above - mentioned purpose is: to provide a device for adjusting and positioning the drilling depth. According to the working characteristics during the drilling operation, by setting a clamping device with a simple structure and easy operation, the effective drilling length of the drill bit is controlled, thereby achieving reliable control of the drilling depth, avoiding the occurrence of quality problems, and improving the drilling efficiency.

[0025] To solve the above - mentioned technical problems, the present utility model is achieved through the following technical solutions: to provide a drilling depth adjustment device with a simple structure and convenient use, realizing controllable drilling depth and ensuring product quality.

[0026] Refer to the attached Figures 1 to 7 As shown in the figure, in the figure: (1) is a straight - shank twist drill bit, (2) is a depth - limiting sleeve, and (3) is a locking nut.

[0027] The utility model relates to a device for adjusting and positioning drilling depth, which is composed of a straight shank twist drill bit (1), a depth limiting sleeve (2), and a locking nut (3). The straight shank twist drill bit 1 is an ordinary twist drill, and this set of drilling depth adjusting device can be used in cooperation with the existing ordinary twist drill bit without the need for a specially made twist drill bit; the main features of the depth limiting sleeve (2) include a shrinkage groove (2-1), a tapered external thread (2-2), and a first hexagonal head (2-3); the main features of the locking nut (3) include a tapered internal thread (3-1) and a second hexagonal head (3-2). The tapered external thread of the depth limiting sleeve (2) is coordinated with the tapered internal thread of the locking nut (3) in terms of specifications. Both the depth limiting sleeve (2) and the locking nut (3) are provided with hexagonal heads to facilitate tightening with an open-end wrench.

[0028] The usage method of this drilling depth control device is as follows:

[0029] Before drilling, install the depth limiting sleeve (2) at the front end of the straight shank twist drill bit (1), and initially tighten the locking nut (3) on the depth limiting sleeve (2). Loosen the threads of the depth limiting sleeve (2) and the locking nut (3). According to the required drilling depth, use a caliper to measure the distance from the end face of the depth limiting sleeve (2) to the drill point of the drill bit at the head of the straight shank twist drill bit (1). First, fix the depth limiting sleeve (2) at the measured dimension position, and use two open-end wrenches to tighten the locking nut (3) at the position where the depth limiting sleeve (2) is fixed to lock the depth limiting sleeve (2). Since the external thread of the depth limiting sleeve (2) has a taper and a shrinkage groove, and the locking nut (3) also has a tapered internal thread, during the tightening process, the three tapered outer walls with threads of the depth limiting sleeve (2) separated by the shrinkage groove are squeezed, so that the tapered outer wall of the depth limiting sleeve (2) is pressed tighter and tighter against the straight shank twist drill bit (1), and the relative position between the straight shank twist drill bit (1) and the depth limiting sleeve (2) will not be displaced. When the depth of the drilled hole reaches the measured depth during drilling, the surface of the workpiece will contact the front end face of the depth limiting sleeve (2), and the straight shank twist drill bit (1) will not move downward, ultimately achieving the purpose of controlling the drilling depth. When it is necessary to adjust the drilling depth, use two open-end wrenches to loosen the threads of the depth limiting sleeve (2) and the locking nut (3), and the limiting device can be moved along the axis of the drill bit. After adjusting the dimension, thread the depth limiting sleeve (2) and the locking nut (3) together to complete the depth adjustment process, which is convenient and fast to operate.

[0030] This device is convenient, efficient, easy to operate, and low in cost. It can effectively control the drilling depth, effectively avoid quality problems, ensure product quality, and improve drilling efficiency.

[0031] Those skilled in the art can understand that, unless otherwise defined, all terms used herein (including technical terms and scientific terms) have the same meaning as the general understanding of those of ordinary skill in the art to which this utility model belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless defined as such here. The specific embodiments described above have further elaborated on the purpose, technical solutions, and beneficial effects of this utility model. It should be understood that the above is only the specific embodiment of this utility model and is not used to limit this utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this utility model shall be included within the protection scope of this utility model.

Claims

1. A drilling depth adjustment device, characterized in that, It includes a straight shank twist drill bit (1), a depth limiting sleeve (2), and a locking nut (3); the depth limiting sleeve (2) is a stepped cylindrical structure, with the large stepped end being the first hexagon head (2-3) and the small stepped end being a tapered external thread (2-2). The tapered external thread (2-2) is integrally formed with the first hexagon head (2-3). The tapered external thread (2-2) is divided into three parts in the circumferential direction, and a shrinkage groove (2-1) is provided between adjacent parts. The locking nut (3) includes a tapered internal thread (3-1) and a second hexagon head (3-2); the tapered external thread (2-2) of the depth limiting sleeve (2) is coordinated with the tapered internal thread (3-1) of the locking nut (3) in terms of specifications. During use, the depth limiting sleeve (2) and the locking nut (3) pass through the straight shank twist drill bit (1), and the depth limiting sleeve (2) is tightened at the set position. The shrinkage groove (2-1) fits against the straight shank twist drill bit (1) under the tightening force to achieve fixation.

2. The device according to claim 1, characterized in that, The first hexagon head (2-3) and the second hexagon head (3-2) are replaced with square heads, and both can be tightened with an open-end wrench.

3. The device according to claim 2, characterized in that, The depth limiting sleeve (2) and the locking nut (3) are both made of 45 steel.

4. The device according to claim 3, characterized in that, The width of the shrinkage groove (2-1) is 1 mm - 2 mm.

5. The device according to claim 4, characterized in that, The height of the shrinkage groove (2-1) should be greater than the height of the locking nut (3) so that the depth limiting sleeve (2) and the locking nut (3) are fully locked.

6. The device according to claim 5, characterized in that, The taper of the shrinkage groove (2-1) is 10° - 15°.

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