Small-diameter drill jig device

Abstract

The utility model provides a small-diameter drill jig device which comprises an expansion shaft and a positioning shaft, one side of the expansion shaft and one side of the positioning shaft are provided with vertically-penetrating positioning holes, the other side of the expansion shaft is provided with a through groove, the middle of the through groove is provided with a threaded taper hole, and a conical head screw in threaded connection is arranged in the threaded taper hole. The drill jig device is inserted into the circumferential hole of the shaft piece, the positioning hole is aligned with the position of a pin hole to be machined, and the expansion shaft is fixed in the circumferential hole in an expansion mode by screwing the conical head screw. According to the drill jig device, high precision, high stability and good chip removal performance are achieved through precise design, and the drill jig device is suitable for the application scene where precise secondary machining needs to be conducted in an existing hole. The machining quality and efficiency are improved, the operation process is simplified, and the device is an ideal choice in the fields of electronic element installation and other precision machining.

Description

Technical Field

[0001] The utility model relates to the field of drilling templates, in particular to a drilling template device with a small diameter. Background Art

[0002] There are usually circumferential holes on the outer circle of petroleum drilling and testing products. There are small pin holes at the bottom of the circumferential holes to fix the direction of electronic components. The small pin holes need to be processed through a drilling jig. Because the circumferential holes are small, the diameter of the drilling jig is also small.

[0003] The existing technologies are only suitable for fixing large-diameter drill jigs: 1. The drill jig is tightened by tightening the side wall with set screws, but the circumferential hole is too small and there is no space on the drill jig to implement the set screws; 2. The drill jig is locked by a fixing key, but because the circumferential hole is too small, there is no space on the drill jig to install the fixing key. Utility Model Content

[0004] The main purpose of the utility model is to provide a small-diameter drilling template device to solve the problems in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: the drilling jig device includes an expansion shaft and a positioning shaft, one side of the expansion shaft and the positioning shaft is provided with a vertically penetrating positioning hole, the other side of the expansion shaft is provided with a through groove, the middle of the through groove is provided with a threaded tapered hole, and a tapered head screw with a threaded connection is provided in the threaded tapered hole;

[0006] The jig device is inserted into the circumferential hole of the shaft, the positioning hole is aligned with the pin hole to be processed, and the expansion shaft is tightened and fixed in the circumferential hole by tightening the cone head screw.

[0007] Preferably, the bottom of the threaded tapered hole is an internal thread, the top is a tapered hole, the bottom of the tapered head screw is threadedly connected to the threaded tapered hole, and the tapered surface of the top rests on the tapered hole.

[0008] Preferably, a groove is provided at the bottom of the positioning shaft, the groove is communicated with the positioning hole, and the groove is used for chip removal.

[0009] Preferably, a guide seat is provided at the top of the positioning hole, and the guide seat is fixed on the expansion shaft.

[0010] Preferably, the top of the guide seat and the positioning hole are provided with inclined surfaces for guiding.

[0011] The utility model provides a small diameter drilling jig device, which has the following beneficial effects:

[0012] 1. The custom design of the expansion shaft and locating shaft ensures that the drilling jig fits tightly with the circumferential hole on the shaft, thereby improving the positional accuracy of the pin hole. The combination of the locating hole and the guide seat provides precise drill guidance, further enhancing the accuracy of the drilling position.

[0013] 2. The expansion shaft expands outwards as the tapered screw tightens in the threaded tapered hole, allowing the jig to be securely positioned within the circumferential hole, providing a stable machining platform. This mechanical expansion mechanism is not only simple and effective, but also adapts to circumferential holes of varying sizes, increasing the versatility of the device.

[0014] 3. The groove design at the bottom of the positioning shaft helps to promptly discharge chips generated during the drilling process, reducing the risk of chip blockage and improving drilling quality and efficiency. Smooth chip removal also reduces tool overheating and damage caused by chip accumulation, extending the service life of tools such as drill bits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a cross-sectional view of the circular hole and pin hole on the shaft;

[0017] Figure 2 This is a schematic diagram of the installation of the drilling template device of the utility model;

[0018] Figure 3 This utility model Figure 2 Middle partial enlarged view a;

[0019] Figure 4 This is an axial side view of the drilling jig device of the utility model;

[0020] Figure 5 This is a front view of the drilling jig device of the utility model;

[0021] Figure 6 This is a top view of the drilling jig device of the utility model;

[0022] Figure 7 This is a front sectional view of the drilling jig device of the utility model;

[0023] In the figure: shaft 1; pin hole 2; circumferential hole 3; drilling jig device 4; expansion shaft 401; positioning shaft 402; positioning hole 403; guide seat 404; cone head screw 405; threaded tapered hole 406; groove 407; through groove 408. DETAILED DESCRIPTION

[0024] like Figures 1 to 7 As shown, a small-diameter drilling jig device, the drilling jig device 4 includes an expansion shaft 401 and a positioning shaft 402. A vertical positioning hole 403 is provided on one side of the expansion shaft 401 and the positioning shaft 402. A through groove 408 is provided on the other side of the expansion shaft 401. A threaded tapered hole 406 is provided in the middle of the through groove 408. A tapered screw 405 with a threaded connection is provided in the threaded tapered hole 406.

[0025] The jig device 4 is inserted into the circumferential hole 3 of the shaft 1 , the positioning hole 403 is aligned with the pin hole 2 to be processed, and the expansion shaft 401 is tightened and fixed in the circumferential hole 3 by tightening the cone head screw 405 .

[0026] like Figure 1 As shown, a pin hole 2 needs to be processed on one side of the bottom of the circumferential hole 3 on the shaft 1 for installing and fixing the direction of the electronic components; the expansion shaft 401 and the positioning shaft 402 in the drilling jig device 4 are customized according to the size of the circumferential hole 3, and the positioning shaft 402 can be inserted into the bottom of the circumferential hole 3. The vertically penetrating positioning hole 403 enables the drill bit to accurately drill and form the pin hole 2 on one side of the bottom of the circumferential hole 3. One side of the expansion shaft 401 is tightened by a cone head screw 405, so that the expansion shaft 401 is tightened and fixed in the circumferential hole 3 through the through groove 408, thereby realizing installation and positioning.

[0027] The expansion shaft 401 and positioning shaft 402 are customized according to the specific dimensions of the target circumferential hole 3 to ensure a tight fit. A vertical through-hole 403 runs through one side of the expansion shaft and positioning shaft, providing an accurate position reference for the subsequent drilling of the pin hole 2. When the jig assembly is correctly mounted on the shaft, this hole points directly to the location where the pin hole will be machined. A through slot 408 is provided on the other side of the expansion shaft, with a tapered hole 406 with internal threads at its center. By tightening a tapered screw 405 placed therein, the expansion shaft can be caused to expand radially outward, thereby effectively clamping the circumferential hole wall.

[0028] Procedure: First, carefully insert the entire jig into the circumferential hole 3 on the shaft 1 to be machined. Ensure that the pilot hole 403 is perfectly aligned with the intended pinhole location. Next, gradually tighten the tapered screw 405, which causes the expansion shaft 401 to slightly expand until it is securely fixed within the circumferential hole. Once the jig is securely in place, insert the appropriate drill bit through the pilot hole 403 and begin precisely drilling the desired pinhole 2.

[0029] This design not only ensures the high accuracy of the newly formed pin hole relative to the original structure, but also can adapt to the needs of holes of different diameters by simply adjusting the specifications of the expansion shaft and positioning shaft accordingly.

[0030] Preferably, the bottom of the threaded tapered hole 406 is an internal thread and the top is a tapered hole. The bottom of the tapered head screw 405 is threadedly connected to the threaded tapered hole 406, and the tapered surface of the top rests on the tapered hole.

[0031] The cone head screw 405 is threadedly connected with the threaded tapered hole 406 and tightened. During the further tightening process, the cone surface cooperates with the tapered hole, so that the expansion shaft 401 expands outward at the through groove 408 and is thus stuck in the circumferential hole 3 for fixation.

[0032] When the taper screw is initially tightened, an axial force is first generated through the threaded connection. As the screw is tightened further, the tapered surface at the top of the taper screw contacts and presses against the tapered surface of the threaded taper hole. Due to the contact point between the tapered surfaces, as the taper screw continues to be screwed in, it exerts radial pressure on the expansion shaft 401. This radial pressure forces the expansion shaft to expand outward along the through groove 408. This outward expansion of the expansion shaft ultimately causes it to become firmly lodged within the circumferential hole 3, thereby securing the entire jig assembly.

[0033] Preferably, a groove 407 is provided at the bottom of the positioning shaft 402, which is connected to the positioning hole 403 and is used for chip removal. The drill bit drills from the positioning hole 403 to the position of the pin hole 2, and the drilled chips are discharged into the groove 407.

[0034] Groove 407 is located at the bottom of positioning shaft 402 and communicates with positioning hole 403, which extends vertically through the shaft. When a drill bit is inserted through positioning hole 403 to form pin hole 2, metal chips generated by the drill bit fall through the gap between the drill bit and the hole wall. The presence of groove 407 allows these chips to be smoothly discharged from the drilling position and fall into the groove.

[0035] Prompt chip removal prevents chips from accumulating around the drill bit or within the hole during drilling, helping to prevent overheating, damage, and inaccurate drilling caused by chip blockage. Removing obstructions that could interfere with the drill bit allows it to operate more smoothly, improving the positioning accuracy and smoothness of the pin hole. This reduces the additional wear caused by chip accumulation and extends the life of the drill bit and other related tools. Smooth chip removal also reduces the safety hazards associated with chip splashing, creating a safer operating environment.

[0036] Preferably, a guide seat 404 is provided at the top of the positioning hole 403, and the guide seat 404 is fixed on the expansion shaft 401. The guide seat 404 and the top of the positioning hole 403 are provided with inclined surfaces for guiding.

[0037] Guide base 404 is fixed to expansion shaft 401 and connected to the top of positioning hole 403. It provides additional support and guidance, helping the drill bit maintain straight movement, thereby reducing potential deflection during drilling. By adding a physical guide structure, the position of the drill bit can be further stabilized, especially at the beginning of drilling, helping to avoid problems caused by improper initial alignment.

[0038] The tops of guide base 404 and positioning hole 403 are provided with beveled surfaces. These bevels help the drill bit align and enter the positioning hole more easily. The beveled design reduces the contact area between the drill bit and the guide base, lowering friction and allowing the drill bit to slide more smoothly into the positioning hole. Furthermore, the beveled surfaces help remove any small chips that may be carried by the drill bit, preventing them from interfering with its normal operation.

[0039] In practice, when the drill bit approaches the guide seat, the beveled surface guides it precisely into the locating hole. Once the drill bit is in the locating hole, the guide seat provides continued support, ensuring that the drill bit drills in the desired direction. This design is particularly important for high-precision drilling operations, as it significantly improves hole placement accuracy and quality.

[0040] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A small diameter drilling jig device, characterized by: The jig device (4) comprises an expansion shaft (401) and a positioning shaft (402), wherein a vertically penetrating positioning hole (403) is provided on one side of the expansion shaft (401) and the positioning shaft (402), and a through slot (408) is provided on the other side of the expansion shaft (401), wherein a threaded tapered hole (406) is provided in the middle of the through slot (408), and a threaded tapered head screw (405) is provided in the threaded tapered hole (406); The jig device (4) is inserted into the circumferential hole (3) of the shaft member (1), the positioning hole (403) is aligned with the pin hole (2) to be processed, and the expansion shaft (401) is tightened and fixed in the circumferential hole (3) by tightening the cone head screw (405).

2. A small diameter drilling jig device according to claim 1, characterized in that: The bottom of the threaded tapered hole (406) is an internal thread, and the top is a tapered hole. The bottom of the tapered head screw (405) is threadedly connected to the threaded tapered hole (406), and the tapered surface of the top abuts against the tapered hole.

3. A small diameter drilling jig device according to claim 1, characterized in that: A groove (407) is provided at the bottom of the positioning shaft (402), the groove (407) is communicated with the positioning hole (403), and the groove (407) is used for chip removal.

4. A small diameter drilling jig device according to claim 1, characterized in that: A guide seat (404) is provided at the top of the positioning hole (403), and the guide seat (404) is fixed on the expansion shaft (401).

5. A small diameter drilling jig device according to claim 4, characterized in that: The tops of the guide seat (404) and the positioning hole (403) are provided with inclined surfaces for guiding.

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