Adjustable self-centering drilling device

Abstract

The utility model discloses an adjustable self-centering drilling device which comprises an adjusting screw rod and an adjusting cone, and the bottom end of the adjusting screw rod is fixedly connected with the adjusting cone. A center hole is formed in the center of the adjusting cone and used for allowing the spring fixing rod to penetrate. A groove gap is formed in the side part of the adjusting cone and is communicated with the central hole; a threaded hole is formed in the base, and the adjusting screw rod penetrates through the threaded hole and can move up and down; a plurality of positioning holes are formed in the base and used for allowing a drilling tool to penetrate through; the fixed cover is fixedly connected with the base; a through hole is formed in the fixed cover; the periphery of the fixed cover is sleeved with a to-be-machined workpiece; one end of the telescopic rod is provided with a boss which is used for being inserted into the edge of the groove gap and can slide, and the other end of the telescopic rod penetrates through the through hole and is fixedly connected with the telescopic supporting head; one end of the telescopic spring is connected with the spring fixing rod, and the other end of the telescopic spring is connected with the telescopic supporting head; by means of the device, machining of circumferential flange holes of a workpiece to be machined can be completed in a self-centering mode, and additional standard alignment is not needed.

Description

Technical Field

[0001] This utility model relates to the field of hole-making technology, and more specifically, to an adjustable self-centering hole-making device. Background Technology

[0002] In daily production and processing, it is often necessary to drill holes around the end face of flange workpieces or certain shell-like parts. The problems include: ① The usual processing method is to complete this on a CNC machine tool, requiring a series of operations such as clamping, alignment, tool changing, programming, unloading from the machine, and cleaning. This not only wastes time and is inefficient but also seriously wastes the capacity of the CNC equipment; ② If a regular drilling jig fitter is used instead, self-centering cannot be achieved. There is a problem that the center of the pitch circle of the drilled flange hole is not aligned with the axis of the flange workpiece itself, resulting in a "misalignment" phenomenon when assembling the two flange end faces, seriously affecting product quality.

[0003] There is currently no effective solution to the problem that the center of the pitch circle of the flange hole is not aligned with the axis of the flange workpiece itself in the existing technology. Utility Model Content

[0004] This invention provides an adjustable self-centering hole-making device to solve the problem in the prior art where the center of the pitch circle of the circumferential flange hole is not aligned with the axis of the flange workpiece itself.

[0005] To achieve the above objectives, this utility model provides an adjustable self-centering hole-making device, comprising: an adjustment unit, the adjustment unit including: an adjustment screw and an adjustment cone, the bottom end of the adjustment screw being fixedly connected to the adjustment cone; a center hole provided at the center of the adjustment cone for a spring fixing rod to pass through; a groove gap provided on the side of the adjustment cone, the groove gap communicating with the center hole; a base, the base having a threaded hole for the adjustment screw to pass through and move up and down; a plurality of through positioning holes provided on the base for a drill bit to pass through; a fixing cover, the fixing cover being fixedly connected to the bottom end of the base; a through hole provided on the fixing cover; and a fixing... The outer periphery of the cover is fitted with a workpiece to be processed; the top surface of the workpiece to be processed is in contact with the bottom surface of the base; a telescopic rod is provided with a boss at one end for insertion into the edge of the groove gap and sliding along the edge of the groove gap, and the other end of the telescopic rod passes through the through hole; a telescopic spring is provided inside the telescopic rod, one end of the telescopic spring is connected to the spring fixing rod, and the other end is connected to the telescopic support head; the telescopic support head is fixedly connected to the other end of the telescopic rod passing through the through hole; when the adjusting unit moves downward, it can squeeze and drive the telescopic rod to slide upward along the edge of the groove gap, thereby increasing the length of the telescopic rod outside the fixed cover until the inner circle of the workpiece to be processed is tightened.

[0006] Optionally, the adjustment unit further includes an adjustment knob; the adjustment knob is fixedly disposed at the top end of the adjustment screw and is used to adjust the up and down movement of the adjustment screw.

[0007] Optionally, at least three groove gaps are provided; at least three through holes are also provided; at least three telescopic rods are also provided; the groove gaps, the through holes, and the telescopic rods are all in one-to-one correspondence.

[0008] Optionally, the threaded hole is located at the center of the base; all the positioning holes are spaced apart around the center of the base.

[0009] Optionally, a transverse rib is provided inside the telescopic support head for fixed connection with the other end of the telescopic spring.

[0010] Optionally, both ends of the telescopic spring are provided with collars. One collar is used to be fitted onto the spring fixing rod and can slide along the spring fixing rod, while the other collar is used to be fitted onto the cross rib for fixed connection.

[0011] Optionally, the fixing cover is fixedly connected to the bottom end of the base by connecting screws.

[0012] Optionally, a drill sleeve is fitted into the positioning hole.

[0013] Optionally, the bottom of the fixing cover is provided with a circular hole for the adjusting cone to pass through.

[0014] Optionally, the telescopic support head is fixedly connected to the other end of the telescopic rod passing through the through hole by a thread.

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

[0016] This invention provides an adjustable self-centering hole-making device. By moving the adjusting unit downwards, the device compresses and drives the telescopic rod to slide upwards along the edge of the groove gap. This increases the length of the telescopic rod outside the fixed cover until the inner circle of the workpiece is tightly supported. At this point, a flange hole is machined around the end face of the workpiece by passing a drill through the positioning hole. This device can self-center and complete the machining of the flange hole around the workpiece without the need for additional datum alignment. It can adapt to the machining needs of workpieces with different inner diameters within a certain range. The device has a simple structure and is easy to manufacture. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of an adjustable self-centering hole-making device provided in an embodiment of this utility model;

[0018] Figure 2 This is a top view of an adjustable self-centering hole-making device provided in an embodiment of the present invention;

[0019] Figure 3 This is a perspective view of an adjustable self-centering hole-making device provided in an embodiment of the present invention;

[0020] Figure 4 This is a perspective view of an adjustable self-centering hole-making device with the fixing cover removed, provided in an embodiment of this utility model.

[0021] Figure 5 This is a perspective view of an adjustable self-centering quality control device and a workpiece to be processed, provided in an embodiment of this utility model.

[0022] Figure 6 This is a perspective view of the adjusting cone provided in an embodiment of the present invention;

[0023] Figure 7 This is a perspective view of the fixing cover provided in an embodiment of the present utility model;

[0024] Figure 8 This is a perspective view of the workpiece to be processed provided in an embodiment of this utility model;

[0025] Figure 9 This is a perspective view of the telescopic rod provided in an embodiment of this utility model;

[0026] Figure 10 This is a perspective view of the telescopic spring provided in an embodiment of this utility model;

[0027] Figure 11 This is a perspective view of the telescopic support head provided in an embodiment of this utility model;

[0028] Figure 12 This is a schematic diagram of the structure of the transverse rib provided in an embodiment of this utility model.

[0029] Symbol explanation:

[0030] Adjustment knob-1, adjustment screw-2, adjustment cone-3, spring fixing rod-4, base-5, fixing cover-6, telescopic rod-7, telescopic spring-8, telescopic support head-9, workpiece to be processed-10, horizontal rib-11, positioning hole-12, drill sleeve-13, center hole-14, groove gap-15, through hole-16. Detailed Implementation

[0031] 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. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] Figure 1 This is a cross-sectional view of an adjustable self-centering hole-making device provided in an embodiment of this utility model; Figure 2 This is a top view of an adjustable self-centering hole-making device provided in an embodiment of the present invention; Figure 3 This is a perspective view of an adjustable self-centering hole-making device provided in an embodiment of the present invention; Figure 4 This is a perspective view of an adjustable self-centering hole-making device according to an embodiment of the present invention, showing the removal of the fixing cover 6; as shown. Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the device includes:

[0033] 1. An adjustment unit, comprising: an adjustment screw 2 and an adjustment cone 3, wherein the bottom end of the adjustment screw 2 is fixedly connected to the adjustment cone 3; a center hole 14 is provided at the center of the adjustment cone 3 for a spring fixing rod 4 to pass through; a groove gap 15 is provided on the side of the adjustment cone 3, and the groove gap 15 communicates with the center hole 14;

[0034] Specifically, the adjustment unit further includes an adjustment knob 1; the adjustment knob 1 is fixedly mounted on the top end of the adjustment screw 2 and is used to adjust the up and down movement of the adjustment screw 2. One end of the adjustment knob 1 has a regular hexagonal shape.

[0035] Figure 6 This is a perspective view of the adjusting cone 3 provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the adjusting cone 3 has a conical structure, and the bottom end of the adjusting screw 2 is fixedly connected to the circular surface of the adjusting cone 3; a central hole 14 is provided in the center of the adjusting cone 3 for the spring fixing rod 4 to pass through; a groove gap 15 is provided on the side of the adjusting cone 3, and at least three groove gaps 15 are provided; in this utility model, the side of the adjusting cone 3 is provided with three groove gaps 15, and all three groove gaps 15 are connected to the central hole 14.

[0036] 2. Base 5, the base 5 is provided with a threaded hole for the adjusting screw 2 to pass through and move up and down; the base 5 is provided with a plurality of through positioning holes 12 for the drilling tool to pass through; the threaded hole is located at the center of the base 5; all the positioning holes 12 are spaced around the center of the base 5.

[0037] Specifically, the base 5 includes: a first cylinder and a second cylinder; the diameter of the first cylinder is smaller than the diameter of the second cylinder; the first cylinder is located on the second cylinder and at the center of the second cylinder; the first cylinder and the second cylinder are an integral structure; the central axis of the first cylinder coincides with the central axis of the second cylinder.

[0038] A threaded hole is provided at the center of the first cylinder and the second cylinder for the adjusting screw 2 to pass through, and the adjusting screw 2 can move up and down along the threaded hole; a plurality of through positioning holes 12 are provided at the edge of the second cylinder for the drilling tool to pass through; all the positioning holes 12 are equally spaced around the center of the second cylinder.

[0039] A drill sleeve 13 is fitted inside the positioning hole 12. Specifically, a suitable drill sleeve 13 can be selected and inserted into the positioning hole 12 according to the size of the flange hole of the workpiece 10 to be processed. This allows for the machining of flange holes of different diameters around the workpiece 10. The drill sleeve 13 and the positioning hole 12 are interference fit. In actual operation, the drill bit is passed through the drill sleeve 13 to process the workpiece 10, machining a ring of flange holes. This utility model can realize the positioning and machining of flange holes on the workpiece 10 by setting the positioning hole 12.

[0040] 3. A fixing cover 6 is fixedly connected to the bottom end of the base 5; a through hole 16 is provided on the fixing cover 6; a workpiece 10 to be processed is sleeved on the periphery of the fixing cover 6; the top surface of the workpiece 10 to be processed is in contact with the bottom surface of the base 5.

[0041] Figure 7 This is a perspective view of the fixing cover 6 provided in an embodiment of this utility model, as shown below. Figure 7 As shown, the fixing cover 6 is fixedly connected to the bottom end of the base 5 by connecting screws; multiple connecting screws are provided. The fixing cover 6 has a cylindrical structure; through holes 16 are provided on the side wall of the fixing cover 6; at least three through holes 16 are provided; in this utility model, three through holes 16 are provided; the three through holes 16 correspond one-to-one with the three groove gaps 15; a round hole is provided at the bottom of the fixing cover 6 for the adjusting cone 3 to pass through; that is, when the adjusting screw 2 moves downward, it will drive the adjusting cone 3 to move downward, and thus it can pass through the round hole.

[0042] Figure 5 This is a perspective view of an adjustable self-centering quality control device and a workpiece 10 to be processed, provided in an embodiment of this utility model. Figure 8 This is a perspective view of the workpiece 10 to be processed provided in this embodiment of the utility model; as shown... Figure 5 and Figure 8 As shown, the workpiece 10 to be processed is a cylindrical structure; a ring of flange holes needs to be machined on the workpiece 10 to be processed; in specific operation, the workpiece 10 to be processed is fitted around the fixed cover 6; and the top surface of the workpiece 10 to be processed is in contact with the bottom surface of the second cylinder.

[0043] 4. Telescopic rod 7: One end of the telescopic rod 7 is provided with a boss for insertion into the edge of the groove gap 15 and can slide along the edge of the groove gap 15. The other end of the telescopic rod 7 passes through the through hole 16. A telescopic spring 8 is provided inside the telescopic rod 7. One end of the telescopic spring 8 is connected to the spring fixing rod 4, and the other end is connected to the telescopic support head 9. The telescopic support head 9 is fixedly connected to the other end of the telescopic rod 7 passing through the through hole 16. When the adjusting unit moves downward, it can squeeze and drive the telescopic rod 7 to slide upward along the edge of the groove gap 15, thereby increasing the length of the telescopic rod 7 outside the fixing cover 6 until the inner circle of the workpiece 10 to be processed is tightened.

[0044] Specifically, Figure 9 This is a perspective view of the telescopic rod 7 provided in an embodiment of this utility model, as shown below. Figure 9 As shown, one end of the telescopic rod 7 ( Figure 9The left end of the telescopic rod 7 is provided with a boss for insertion into the edge of the groove gap 15, and the telescopic rod 7 can slide along the edge of the groove gap 15; at least three telescopic rods 7 are provided, with each of the three telescopic rods 7 corresponding to one of the three groove gaps 15; and each of the three telescopic rods 7 corresponding to one of the three through holes 16; the other end of the telescopic rod 7 ( Figure 9 The right end of the cable passes through the through hole 16 on the fixed cover 6 and is threadedly connected to the telescopic support head 9.

[0045] Figure 11 This is a perspective view of the telescopic support head 9 provided in an embodiment of this utility model, as shown below. Figure 11 As shown, the telescopic support head 9 includes: a bent plate and a third cylinder that are fixedly connected; and a transverse rib 11 is provided inside the telescopic support head 9. Figure 12 This is a structural schematic diagram of the transverse rib 11 provided in an embodiment of this utility model, as shown below. Figure 12 As shown, the transverse rib 11 is disposed within the third cylinder.

[0046] Figure 10 This is a perspective view of the telescopic spring 8 provided in an embodiment of this utility model, as shown below. Figure 10 As shown, a telescopic spring 8 is provided inside the telescopic rod 7. One end of the telescopic spring 8 is connected to the spring fixing rod 4, and the other end is connected to the horizontal rib 11. Specifically, both ends of the telescopic spring 8 are provided with collars. The collar at one end is used to be sleeved on the spring fixing rod 4 and can slide along the spring fixing rod 4. The collar at the other end is used to be sleeved on the horizontal rib 11 for fixed connection.

[0047] The present invention will be described below through specific operating steps:

[0048] 1. Select a suitable drill bushing 13 according to the size of the flange hole to be machined on the workpiece 10 and install it into the positioning hole 12 around the base 5. The drill bushing 13 and the positioning hole 12 are interference fit.

[0049] 2. Fix the adjusting knob 1 to the adjusting screw 2, and insert the adjusting screw 2 into the threaded hole of the base 5;

[0050] 3. Securely connect the bottom end of adjusting screw 2 to the adjusting cone;

[0051] 4. Pass the collar at one end of the telescopic spring 8 through the groove gap 15 of the adjusting cone 3 and put it onto the spring fixing rod 4;

[0052] 5. Insert the other end of the telescopic spring 8 into the telescopic rod 7 and insert the end of the telescopic rod 7 with the boss into the edge of the groove gap 15 of the adjusting cone 3;

[0053] 6. Insert the other ends of the three telescopic rods 7 into the three through holes 16 of the fixing cover 6 respectively;

[0054] 7. The collar at the other end of the telescopic spring 8, which passes through the other end of the telescopic rod 7, is put onto the horizontal rib 11 of the telescopic support head 9;

[0055] 8. Secure the telescopic support head 9 to the telescopic rod 7 using threads;

[0056] 9. Secure the top of the fixing cover 6 to the base 5 using connecting screws;

[0057] 10. Insert the entire adjustable self-centering hole-making device into the inner circle of the workpiece 10 to be processed from the side below the base 5;

[0058] 11. Rotate the adjusting knob 1 on the adjusting screw 2. The adjusting screw 2 moves downward. At this time, because the diameter of the adjusting cone 3 in the horizontal direction of the telescopic rod 7 increases, it will squeeze and drive the telescopic rod 7 to slide upward along the edge of the groove gap 15. Then the length of the telescopic rod 7 outside the fixed cover 6 increases (i.e., it expands outward in the horizontal direction) until the inner circle of the workpiece 10 to be processed is tightened.

[0059] 12. Adjust the position of the adjustable self-centering hole-making device and the workpiece 10 to complete the drilling process (i.e., machine a ring of flange holes on the workpiece 10).

[0060] The device of this invention can achieve self-centering to complete the processing of flange holes without the need for additional datum alignment; and the device of this invention can adapt to the processing needs of workpieces 10 with different inner diameters within a certain range; furthermore, the device of this invention can process flange holes of different diameters according to different specifications of drill bushings 13; the device of this invention has a simple structure and is easy to manufacture.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An adjustable self-centering hole-making device, characterized in that, include: An adjustment unit, comprising: an adjustment screw and an adjustment cone, wherein the bottom end of the adjustment screw is fixedly connected to the adjustment cone; a center hole is provided at the center of the adjustment cone for a spring fixing rod to pass through; and a groove gap is provided on the side of the adjustment cone, the groove gap communicating with the center hole. The base has a threaded hole for the adjusting screw to pass through and move up and down; the base also has multiple through positioning holes for the drill bit to pass through. A fixed cover is fixedly connected to the bottom end of the base; a through hole is provided on the fixed cover; a workpiece to be processed is sleeved around the fixed cover; the top surface of the workpiece to be processed is in contact with the bottom surface of the base; A telescopic rod is provided with a boss at one end for insertion into the edge of the groove gap and sliding along the edge of the groove gap. The other end of the telescopic rod passes through the through hole. A telescopic spring is provided inside the telescopic rod, with one end connected to the spring fixing rod and the other end connected to the telescopic support head. The telescopic support head is fixedly connected to the other end of the telescopic rod passing through the through hole. When the adjusting unit moves downward, it can squeeze and drive the telescopic rod to slide upward along the edge of the groove gap, thereby increasing the length of the telescopic rod outside the fixed cover until the inner circle of the workpiece to be processed is tightened.

2. The apparatus according to claim 1, characterized in that: The adjustment unit further includes an adjustment knob; the adjustment knob is fixedly disposed at the top end of the adjustment screw and is used to adjust the up and down movement of the adjustment screw.

3. The apparatus according to claim 1, characterized in that: At least three groove gaps are provided; at least three through holes are also provided; at least three telescopic rods are also provided; the groove gaps, the through holes, and the telescopic rods are all in one-to-one correspondence.

4. The apparatus according to claim 1, characterized in that: The threaded hole is located at the center of the base; All of the positioning holes are spaced apart around the center of the base.

5. The apparatus according to claim 1, characterized in that: A horizontal rib is provided inside the telescopic support head for fixed connection with the other end of the telescopic spring.

6. The apparatus according to claim 5, characterized in that: Both ends of the telescopic spring are provided with collars. One collar is used to fit onto the spring fixing rod and can slide along the spring fixing rod, while the other collar is used to fit onto the cross rib for fixed connection.

7. The apparatus according to claim 1, characterized in that: The fixing cover is fixedly connected to the bottom end of the base by connecting screws.

8. The apparatus according to claim 1, characterized in that: A drill sleeve is fitted into the positioning hole.

9. The apparatus according to claim 1, characterized in that: The bottom of the fixing cover is provided with a round hole for the adjusting cone to pass through.

10. The apparatus according to claim 1, characterized in that: The telescopic support head is fixedly connected to the other end of the telescopic rod that passes through the through hole by a thread.

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