External adjustment type drill bit positioning device for cylindrical workpieces

Abstract

The present invention discloses an externally adjustable drill bit positioning device for cylindrical workpieces, which includes a fixed square box body, a pressing mechanism and an adjusting mechanism. A longitudinal slot is provided in the central area of the upper end surface of the fixed square box body, and a shaping frame is fitted and installed in the slot. A series of drill rod positioning holes are longitudinally distributed in the center of the shaping frame; arc-shaped support seats are symmetrically installed in sequence at the bottom of the inner cavity of the fixed square box body. A positioning nut is provided in the middle of the fixed square box body above the arc-shaped support seats. A pressing bolt is installed in the positioning nut, and a rotating handle is provided at the upper end of the pressing bolt. The present invention has the advantages of accurate positioning and high stability, can prevent the drill rod from breaking, improve the processing efficiency and reduce the consumable cost.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing positioning tools, and in particular relates to an externally adjustable drill bit positioning device for a cylindrical workpiece. Background Art

[0002] When radial drilling is performed on the circumferential surface of a cylindrical part, due to the smooth surface of the cylindrical part, such as a thin-diameter stainless steel tube, the drill rod is very hard but very fragile, and the drill rod will basically break if it is directly pressed against the cylindrical part. At present, the surface drilling of cylindrical parts is done on a machine tool, with the cylindrical part placed on a V-shaped iron for drilling. Due to the high precision of the machine tool, the drill rod and the cylindrical part are accurately positioned, and the rod feeding force is uniform, so the processing can be normal. However, for bench drills used in homes or laboratories, they do not have the degree of precise positioning, so it is difficult to achieve effective drilling on the surface of cylindrical parts. At present, there is no universal fixture suitable for drilling and positioning on cylindrical parts. Some fixtures used for cylindrical parts use a process of marking, drilling, adjustment, and positioning, in which the adjustment requires a certain level of technical skills and is particularly time-consuming. Summary of the invention

[0003] In view of the problem that cylindrical parts are difficult to process by bench drilling and the problem that the existing positioning fixtures have poor use effect, the present invention provides a cylindrical workpiece externally adjustable drill bit positioning device.

[0004] The solution adopted by the present invention to solve the technical problem is: a cylindrical workpiece external adjustment type drill bit positioning device, comprising a fixed square frame, a clamping mechanism and an adjustment mechanism, the fixed square frame is a rectangular frame, a longitudinal clamping groove is arranged in the central area of ​​the upper end surface, a shaping frame is matched and installed in the clamping groove, and a series of drill rod positioning holes are distributed in the longitudinal direction at the center of the shaping frame; a rectangular adjustment gap is arranged on one side or both sides of the fixed square frame, and a vertical guide column and an adjustment screw are arranged in sequence in the adjustment gap; at the same time, a sliding frame is sleeved in the adjustment gap, and the sliding frame is provided with a vertical guide hole, and the guide hole is sleeved on the corresponding guide column; a toggle wheel is arranged at the upper end of the adjustment screw; A longitudinal card slot is arranged in the central area of ​​the sliding frame, a forming frame is matched and installed in the card slot, and a series of drill rod positioning holes are distributed in the longitudinal direction at the center of the forming frame; the bottom of the inner cavity of the fixed square frame is an arc surface, and base guide holes distributed in the radial direction are arranged around the arc surface; an arc support seat is installed in each guide hole of the fixed square frame, each arc support seat comprises an arc convex surface and a base guide rod at the lower part, the base guide rod is matched and installed in the corresponding base guide hole, and a spring is installed in the base guide hole; a positioning nut is arranged in the middle of the fixed square frame above the arc support seat, a clamping bolt is installed in the positioning nut, and a rotating handle is arranged at the upper end of the clamping bolt.

[0005] The contact between the periphery of the shaping frame and the card slot is wrapped and fixed by a flexible belt.

[0006] Beneficial effects of the present invention: The present invention can position the cylindrical workpiece through the arc surface support seat, and press the upper end of the cylindrical workpiece through the clamping bolt, so that the cylindrical workpiece can be firmly fixed in the fixed square frame and stably immobile. When the fixed square frame is clamped and fixed by the bench drill fixture, the cylindrical workpiece is also fixed. A series of drill rod positioning holes for guiding and positioning are distributed on the shaping frame at the inner end of the slot. After the bench drill enters the fixed square frame from the corresponding drill rod positioning holes, the smooth surface of the cylindrical workpiece is drilled. The present invention has the advantages of accurate positioning and high stability, can prevent the drill rod from breaking, improve processing efficiency, and reduce consumables costs.

[0007] The arc support seat at the bottom of the fixed square frame is movably installed and can be adjusted and disassembled as needed. The lower end of the base guide rod is sleeved in the base guide hole and supported by a spring, which can achieve the effect of pressing and buffering the cylindrical workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0009] Figure 2 yes Figure 1 Schematic diagram of the internal cross-section structure.

[0010] Figure 3 yes Figure 1 Assembly diagram of the middle adjustment mechanism.

[0011] In the figure: numeral 1 is a fixed square frame, 2 is a positioning nut, 3 is a clamping bolt, 4 is a clamping head, 5 is a rotating handle, 6 is an arc support seat, 7 is a base guide hole, 8 is a base guide rod, 9 is a spring, 10 is an adjustment gap, 11 is a sliding frame, 12 is a guide column, 13 is an adjustment screw hole, 14 is an adjustment screw, 15 is a groove, 16 is a toggle wheel, 17 is a slot, 18 is a shaping frame, 19 is a drill rod positioning hole, 20 is a cylindrical workpiece, and 21 is a clearance groove. DETAILED DESCRIPTION

[0012] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Example: Cylindrical workpiece external adjustment drill bit positioning device Figure 1 and Figure 2 The device is used in combination with a bench drill fixture, and includes a fixed square frame 1, a clamping mechanism, an adjusting mechanism and other components.

[0014] Depend on Figure 2 It can be seen that the fixed square frame 1 is a rectangular frame, and its four outer end faces are successively vertical planes. Each flat end face located on the outer side can be installed in a bench drill fixture and fixed.

[0015] A longitudinal slot 17 is provided at the center of the upper end surface of the fixed square frame 1 , a shaping frame 18 is matched and installed in the slot 17 , and a series of drill rod positioning holes 19 are distributed in the center of the shaping frame 18 along the longitudinal direction.

[0016] At the same time, a rectangular adjustment gap 10 is arranged on one side or both sides of the fixed frame 1, and a vertical guide column 12 and an adjustment screw 14 are arranged in sequence in the adjustment gap 10.

[0017] A sliding frame 11 is mounted in the adjustment gap 10. The sliding frame 11 is provided with vertical guide holes, which are mounted on corresponding guide posts 12. A toggle wheel 16 is provided at the upper end of the adjustment screw 14. Figure 1 In the embodiment, a groove is provided on the upper side of the fixed frame 1, and the toggle wheel is hidden in the groove, so that the toggle wheel does not protrude beyond the side of the fixed frame 1. The toggle wheel 16 can drive the adjusting screw 14 to rotate by toggling the toggle wheel 16 with a finger, thereby controlling the sliding frame 11 to move up and down in the adjusting gap 10 of the fixed frame 1. A scale is provided on the side of the adjusting gap 10 to quickly indicate the adjustment degree.

[0018] See also Figure 3 As shown, a longitudinal slot 17 is provided in the central area of ​​the sliding frame 11 , a shaping frame 18 is matched and installed in the slot 17 , and a series of drill rod positioning holes 19 are distributed in the center of the shaping frame 18 along the longitudinal direction.

[0019] The shaping frame 18 located in the corresponding slot 17 can be replaced. The shaping frame 18 is made of a high-smoothness polymer material, a ceramic material, or a metal material. The periphery of the shaping frame 18 and the contact point with the slot 17 are wrapped and fixed with a flexible belt so that the shaping frame 18 can be embedded in the corresponding slot 17. The space of a series of drill rod positioning holes 19 located on each shaping frame 18 can be of a uniform diameter, or a diameter that increases or decreases in sequence, which can meet the processing requirements of drill rods of corresponding diameters.

[0020] The cylindrical workpiece needs to be fixed at the center position of the inner side of the fixed frame body. There are various ways to fix the cylindrical workpiece. This embodiment adopts the following method: Figure 2 The fixing method shown.

[0021] from Figure 2 It can be seen that the bottom of the inner cavity of the fixed square frame 1 is an arc surface, and base guide holes 7 distributed radially are arranged around the arc surface. An arc support seat 6 is installed in each guide hole of the fixed square frame 1, and each arc support seat 6 includes an arc convex surface and a base guide rod 8 at the bottom. The base guide rod 8 is matched and installed in the corresponding base guide hole 7, and a spring is installed in the base guide hole 7.

[0022] In addition, a structural component for pressing the cylindrical workpiece is also required. In Figure 2 , a positioning nut 2 is arranged in the middle of the fixed square box body 1 above the arc surface support seat 6, a pressing bolt 3 is installed in the positioning nut 2, and a rotating handle is arranged at the upper end of the pressing bolt 3.

Claims

1. A cylindrical workpiece externally adjustable drill bit positioning device, Its characteristics are: The invention comprises a fixed square frame, a clamping mechanism and an adjusting mechanism. The fixed square frame is a rectangular frame, and a longitudinal slot is arranged in the central area of ​​the upper end surface. A shaping frame is matched and installed in the slot, and a series of drill rod positioning holes are distributed in the longitudinal direction in the center of the shaping frame; a rectangular adjustment gap is arranged on one side or both sides of the fixed square frame, and vertical guide columns and adjustment screws are arranged in sequence in the adjustment gap; at the same time, a sliding frame is sleeved in the adjustment gap, and the sliding frame is provided with vertical guide holes, which are sleeved on the corresponding guide columns; a A toggle wheel; a groove is provided on the upper side of the fixed square frame, and the toggle wheel is hidden in the groove, so that the toggle wheel will not protrude beyond the side of the fixed square frame when it is toggled; the toggle wheel can drive the adjusting screw to rotate by using a finger, so as to control the sliding frame to move up and down within the adjustment gap of the fixed square frame; a longitudinal card slot is provided in the central area of ​​the sliding frame, and a shaping frame is matched and installed in the card slot, and a series of drill rod positioning holes are distributed in the center of the shaping frame along the longitudinal direction; the fixed square frame is a rectangular frame, and its four outer end faces are successively vertical planes; the fixed frame The bottom of the inner cavity is an arc surface, and base guide holes distributed radially are arranged around the arc surface; an arc support seat is installed in each guide hole of the fixed square frame, and multiple arc support seats are symmetrically arranged at the bottom of the fixed square frame, each arc support seat has an arc convex surface and a base guide rod at the bottom, and the convex heights of the multiple arc convex surfaces increase from the bottom of the arc surface to the two sides, and the base guide rods are matched and installed in the corresponding base guide holes, and springs are installed in the base guide holes; a positioning nut is arranged in the middle of the fixed square frame above the arc support seat, and the positioning nut is arranged in the middle of the fixed square frame above the arc support seat. A clamping bolt is installed in the nut, and a rotating handle is provided on the upper end of the clamping bolt; the arc support seat located at the bottom of the fixed square frame is movably installed and can be adjusted and disassembled according to needs. The lower end of the base guide rod is inserted into the base guide hole and supported by a spring to achieve the effect of clamping and buffering the cylindrical workpiece; the arc support seat positions the cylindrical workpiece and clamps the upper end of the cylindrical workpiece by the clamping bolt, so that the cylindrical workpiece is firmly fixed in the fixed square frame and is stable. When the fixed square frame is clamped and fixed by the bench drill fixture, the cylindrical workpiece is also fixed.

2. The cylindrical workpiece externally adjustable drill bit positioning device according to claim 1, Its characteristics are: The contact between the periphery of the shaping frame and the card slot is wrapped and fixed by a flexible belt.

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