Adjustable self-centering drilling device

Abstract

The invention 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] The invention relates to the technical field of hole making, in particular to an adjustable self-centering hole making device. Background Art

[0002] In daily production and processing, it is often necessary to make holes around the end faces of flange workpieces or certain shell parts; the problems are: ① The usual processing method is to complete it on a CNC machine tool, which requires a series of operations such as clamping, alignment, tool changing, programming, unloading from the machine tool, and cleaning, which not only wastes time and is inefficient, but also seriously wastes the production capacity of CNC equipment; ② If ordinary drilling jigs and fitters are used instead, self-centering cannot be achieved, and there is a problem that the center of the pitch circle positioning circle of the manufactured circumferential flange hole is not coaxial with the axis of the flange workpiece itself, resulting in a "wrong side" phenomenon when the two flange end faces are assembled, seriously affecting product quality.

[0003] With regard to the problem in the prior art that the center of the pitch circle where the peripheral flange hole is located is not coaxial with the axis of the flange workpiece itself, no effective solution has been proposed yet. Summary of the invention

[0004] An adjustable self-centering hole-making device is provided in an embodiment of the present invention to solve the problem in the prior art that the center of the pitch circle where the peripheral flange hole is made is not coaxial with the axis of the flange workpiece itself.

[0005] To achieve the above-mentioned purpose, the present invention provides an adjustable self-centering hole-making device, which includes: an adjusting unit, the adjusting unit includes: an adjusting screw and an adjusting cone, the bottom end of the adjusting screw is fixedly connected to the adjusting cone; a center hole is provided at the center of the adjusting cone for the spring fixing rod to pass through; a groove gap is provided on the side of the adjusting cone, and the groove gap is communicated with the center hole; a base, a threaded hole is provided on the base, for the adjusting screw to pass through and move up and down; a plurality of through positioning holes are provided on the base, for the drilling tool to pass through; a fixing cover, the fixing cover is fixedly connected to the bottom end of the base; a through hole is provided on the fixing cover; The outer sleeve is provided 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, one end of which is provided with a boss for being inserted into the edge of the groove gap and can slide 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 in 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, the telescopic rod can be squeezed to slide upward along the edge of the groove gap, and then the length of the telescopic rod outside the fixed cover increases until the inner circle of the workpiece to be processed is tightened.

[0006] Optionally, the adjusting unit further includes: an adjusting knob; the adjusting knob is fixedly disposed on the top end of the adjusting screw and is used for adjusting the up and down movement of the adjusting screw.

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

[0008] Optionally, the threaded hole is arranged at the center of the base; and all the positioning holes are arranged at intervals around the center of the base.

[0009] Optionally, a transverse rib is provided in the telescopic support head for fixedly connecting with the other end of the telescopic spring.

[0010] Optionally, both ends of the telescopic spring are provided with collars, the collar at one end is used to be sleeved on the spring fixing rod and can slide along the spring fixing rod, and the collar at the other end is used to be sleeved on the transverse rib for fixed connection.

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

[0012] Optionally, a drill sleeve is installed in the positioning hole.

[0013] Optionally, a circular hole is provided at the bottom of the fixed cover for allowing 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 via threads.

[0015] Beneficial effects of the present invention:

[0016] The present invention provides an adjustable self-centering hole-making device, which can move an adjusting unit downward to squeeze and drive a telescopic rod to slide upward along the edge of a groove gap, thereby increasing the length of the telescopic rod outside a fixed cover until the inner circle of a workpiece to be processed is tightened, and at this time, a circle of flange holes is processed on the end face of the workpiece to be processed through a drilling tool through a positioning hole; the device can realize self-centering to complete the processing of the circumferential flange holes of the workpiece to be processed without the need for additional reference alignment; the device can adapt to the processing needs of workpieces to be processed with different inner diameters within a certain range; the device has a simple structure and is easy to manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a cross-sectional view of an adjustable self-centering hole-making device provided by an embodiment of the present invention;

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

[0019] Figure 3 is a stereoscopic diagram of an adjustable self-centering hole-making device provided by an embodiment of the present invention;

[0020] Figure 4 It is a three-dimensional diagram of an adjustable self-centering hole-making device provided by an embodiment of the present invention without a fixed cover;

[0021] Figure 5 It is a stereoscopic diagram of an adjustable self-centering quality control device and a workpiece to be processed provided by an embodiment of the present invention;

[0022] Figure 6 is a stereoscopic diagram of an adjustment cone provided by an embodiment of the present invention;

[0023] Figure 7 is a three-dimensional diagram of a fixed cover provided by an embodiment of the present invention;

[0024] Figure 8 is a three-dimensional diagram of a workpiece to be processed provided by an embodiment of the present invention;

[0025] Fig. 9 is a three-dimensional diagram of a telescopic rod provided by an embodiment of the present invention;

[0026] Fig.10 is a three-dimensional diagram of a telescopic spring provided by an embodiment of the present invention;

[0027] Fig.11 is a three-dimensional diagram of a telescopic support head provided by an embodiment of the present invention;

[0028] Fig.12 It is a schematic diagram of the structure of the transverse reinforcement provided by an embodiment of the present invention.

[0029] Explanation of symbols:

[0030] Adjusting knob-1, adjusting screw-2, adjusting 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, transverse rib-11, positioning hole-12, drill sleeve-13, center hole-14, groove gap-15, through hole-16. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Figure 1 is a cross-sectional view of an adjustable self-centering hole-making device provided by an embodiment of the present invention; Figure 2 is a top view of an adjustable self-centering hole-making device provided by an embodiment of the present invention; Figure 3 is a stereoscopic diagram of an adjustable self-centering hole-making device provided by an embodiment of the present invention; Figure 4 1 is a stereoscopic diagram of an adjustable self-centering hole-making device provided by an embodiment of the present invention without a fixed cover 6; Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the device comprises:

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

[0034] Specifically, the adjusting unit further includes: an adjusting knob 1; the adjusting knob 1 is fixedly arranged at the top end of the adjusting screw 2, and is used to adjust the up and down movement of the adjusting screw 2. One end of the adjusting knob 1 has a regular hexagonal structure.

[0035] Figure 6 3 is a perspective view of the adjustment cone 3 provided in an embodiment of the present invention, as shown in FIG. Figure 6 As shown, the adjusting cone 3 is 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 center hole 14 is provided at the center of the adjusting cone 3 for the spring fixing rod 4 to penetrate; a groove gap 15 is provided on the side of the adjusting cone 3, and at least three groove gaps 15 are provided; in the present invention, three groove gaps 15 are provided on the side of the adjusting cone 3, and the three groove gaps 15 are all communicated with the center hole 14.

[0036] 2. A base 5, wherein a threaded hole is provided on the base 5 for the adjusting screw 2 to be inserted and moved up and down; a plurality of through positioning holes 12 are provided on the base 5 for the drilling tool to be inserted; the threaded hole is provided at the center of the base 5; and all the positioning holes 12 are provided at intervals 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 integrated structure; the central axis of the first cylinder coincides with the central axis of the second cylinder.

[0038] A connected 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 arranged at equal intervals around the center of the second cylinder.

[0039] A drill sleeve 13 is installed in the positioning hole 12; specifically, a drill sleeve 13 of appropriate specifications can be selected according to the size of the flange hole of the workpiece 10 to be processed and installed in the positioning hole 12, so that the workpiece 10 to be processed can be processed with circumferential flange holes of different diameters; the drill sleeve 13 and the positioning hole 12 are interference fit. In specific work, the drill tool is passed through the drill sleeve 13 to process the workpiece 10 to be processed, and a circle of flange holes is processed. The present invention can realize the positioning and processing of the flange hole on the workpiece 10 to be processed by setting the positioning hole 12.

[0040] 3. A fixed cover 6, wherein the fixed cover 6 is fixedly connected to the bottom end of the base 5; a through hole 16 is provided on the fixed cover 6; a workpiece 10 to be processed is sleeved on the periphery of the fixed 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 is a three-dimensional diagram of a fixed cover 6 provided in an embodiment of the present invention, such as Figure 7 As shown, the fixed cover 6 is fixedly connected to the bottom end of the base 5 by connecting screws; there are multiple connecting screws. The fixed cover 6 is a cylindrical structure; a through hole 16 is provided on the side wall of the fixed cover 6; at least three through holes 16 are provided; in the present invention, three through holes 16 are provided; the three through holes 16 correspond to the three groove gaps 15 one by one; a circular hole is provided at the bottom of the fixed cover 6 for the adjustment cone 3 to pass through; that is, when the adjustment screw 2 moves downward, it will drive the adjustment cone 3 to move downward, and then pass through the circular hole.

[0042] Figure 5 is a stereoscopic diagram of an adjustable self-centering quality control device and a workpiece 10 to be processed provided by an embodiment of the present invention; Figure 8 is a three-dimensional diagram of a workpiece 10 to be processed provided by an embodiment of the present invention; Figure 5 and Figure 8As shown, the workpiece 10 to be processed is a cylindrical structure; a circle of flange holes needs to be processed on the workpiece 10 to be processed; during the specific operation, the workpiece 10 to be processed is sleeved on the periphery of the fixed cover 6; and the top surface of the workpiece 10 to be processed is made to fit with the bottom surface of the second cylinder.

[0043] 4. Telescopic rod 7, one end of which is provided with a boss for being inserted into the edge of the groove gap 15 and being able to slide along the edge of the groove gap 15, and the other end of the telescopic rod 7 passes through the through hole 16; a telescopic spring 8 is provided in the telescopic rod 7, one end of which 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, the telescopic rod 7 can be squeezed to 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 fixed cover 6 until the inner circle of the workpiece 10 to be processed is tightened.

[0044] Specifically, Fig. 9 is a three-dimensional diagram of the telescopic rod 7 provided in an embodiment of the present invention, such as Fig. 9 As shown, one end of the telescopic rod 7 ( Fig. 9 The telescopic rod 7 is provided with a boss at the left end thereof, which is used for being inserted 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, and the three telescopic rods 7 correspond to the three groove gaps 15 one by one; and the three telescopic rods 7 correspond to the three through holes 16 one by one; the other end of the telescopic rod 7 ( Fig. 9 The middle right end) passes through the through hole 16 on the fixed cover 6 and is threadedly fixedly connected with the telescopic support head 9;

[0045] Fig.11 is a stereogram of a telescopic support head 9 provided in an embodiment of the present invention, such as Fig.11 As shown, the telescopic support head 9 includes: a bent plate and a third cylinder that are fixedly connected; a transverse rib 11 is arranged inside the telescopic support head 9; Fig.12 is a schematic diagram of the structure of the transverse rib 11 provided in an embodiment of the present invention, such as Fig.12 As shown, the transverse rib 11 is arranged in the third cylinder.

[0046] Fig.10 is a three-dimensional diagram of a telescopic spring 8 provided in an embodiment of the present invention, such as Fig.10As shown, a telescopic spring 8 is arranged in 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 transverse rib 11; specifically, both ends of the telescopic spring 8 are provided with rings, the ring at one end is used to be sleeved on the spring fixing rod 4 and can slide along the spring fixing rod 4, and the ring at the other end is used to be sleeved on the transverse rib 11 and fixedly connected.

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

[0048] 1. According to the size of the flange hole to be processed on the workpiece 10, select a drill sleeve 13 of appropriate specifications and install it into the positioning hole 12 around the base 5. The drill sleeve 13 and the positioning hole 12 are interference fit;

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

[0050] 3. Fix the bottom end of the adjusting screw 2 to the adjusting vertebral body;

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

[0052] 5. Insert the other end of the telescopic spring 8 into the telescopic rod 7 and install 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 fixed cover 6 respectively;

[0054] 7. Insert the collar at the other end of the telescopic spring 8 passing through the other end of the telescopic rod 7 onto the transverse rib 11 of the telescopic support head 9;

[0055] 8. Connect the telescopic support head 9 and the telescopic rod 7 by screw thread;

[0056] 9. Fix the top of the fixed cover 6 to the base 5 by connecting screws;

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

[0058] 11. Rotate the adjusting knob 1 on the adjusting screw 2, and the adjusting screw 2 moves downward. At this time, the diameter of the adjusting cone 3 on the telescopic rod 7 in the horizontal direction becomes larger, which squeezes and drives 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 (that is, it expands outward in the horizontal direction) until the inner circle of the workpiece 10 to be processed is tightened;

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

[0060] The device of the present invention can realize self-centering to complete the processing of flange holes without the need for additional reference alignment; and the device of the present invention can adapt to the processing needs of workpieces 10 to be processed with different inner diameters within a certain range; further, the device of the present invention can process flange holes of different diameters according to drill sleeves 13 of different specifications; the device of the present 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 the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adjustable self-centering hole making device, characterized in that: include: The adjusting unit comprises: an adjusting screw and an adjusting cone, wherein the bottom end of the adjusting screw is fixedly connected to the adjusting cone; a center hole is provided at the center of the adjusting cone for allowing a spring fixing rod to penetrate; a groove gap is provided at the side of the adjusting cone, and the groove gap is communicated with the center hole; A base, wherein the base is provided with a threaded hole for the adjusting screw to pass through and move up and down; and the base is provided with a plurality of through positioning holes for the drilling tool to pass through; A fixed cover, the 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 on the periphery of 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, one end of which is provided with a boss for being inserted into the edge of the groove gap and being able to slide 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 in 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, the telescopic rod can be squeezed 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 device according to claim 1, characterized in that: The adjusting unit further comprises: an adjusting knob; the adjusting knob is fixedly arranged at the top end of the adjusting screw and is used for adjusting the up and down movement of the adjusting screw.

3. The device according to claim 1, characterized in that: There are at least three groove gaps, at least three through holes, and at least three telescopic rods. The groove gaps, the through holes, and the telescopic rods all correspond to each other one by one.

4. The device according to claim 1, characterized in that: The threaded hole is arranged at the center of the base; All of the positioning holes are arranged at intervals around the center of the base.

5. The device according to claim 1, characterized in that: A transverse rib is arranged inside the telescopic support head for fixedly connecting with the other end of the telescopic spring.

6. The device according to claim 5, characterized in that: Both ends of the telescopic spring are provided with collars, the collar at one end is used to be sleeved on the spring fixing rod and can slide along the spring fixing rod, and the collar at the other end is used to be sleeved on the transverse rib for fixed connection.

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

8. The device according to claim 1, characterized in that: A drill sleeve is installed in the positioning hole.

9. The device according to claim 1, characterized in that: A circular hole is arranged at the bottom of the fixed cover for allowing the adjusting cone to pass through.

10. The device according to claim 1, characterized in that: The telescopic support head is fixedly connected to the other end of the telescopic rod passing through the through hole via threads.

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