Combined drilling tool for valve body machining

Abstract

The utility model discloses a combined drilling tool for valve body machining. The combined drilling tool comprises a tool handle. A twist drill is installed in a round hole in the lower end of the cutter handle, a fixing screw is in threaded connection with the interior of a threaded hole in the lower end of the outer arc face of the cutter handle and matched with the twist drill, and a receding groove is formed in the upper end of the outer arc face of the twist drill, and a first blade is installed in a first cutter groove in the lower end of the cutter handle through a first screw. The rear end of the first blade of the receding groove is arranged in a matched mode, a positioning strip is arranged at the lower end of the cutter handle, the rear end of the positioning strip is in sliding connection with the receding groove, a rectangular groove is formed in the middle of the outer arc face, and a trapezoidal piece is in sliding connection with the middle of the rectangular groove. The twist drill and the machining blade can be replaced, compensation supporting can be provided for the twist drill, the twist drill and the first blade are overlapped, the machining cost of the valve body is reduced, and meanwhile good machining quality is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve body processing, in particular to a composite drilling tool for valve body processing. Background Art

[0002] Valves are widely used in our lives. Valves are generally composed of a valve body and a valve core. The valve body, also known as the valve shell, is the most important part of the valve assembly, holding all the parts together like a frame. The end of the valve body is generally designed with a flange connected to the pipeline, and the use of drilling tools is indispensable in the process of valve body processing. The existing drilling tools generally have a single structure, and generally a twist drill can only be used for drilling operations. When the requirements for the valve are high, it is necessary to replace different tools for secondary processing when countersinking is required, which affects the processing efficiency. There are also large-diameter twist drills that are ground to a small diameter at the lower end, and then the lower end is drilled, and the middle step is countersunk, which greatly improves the processing efficiency of the valve body. However, large-diameter twist drills are more expensive, and they need to be processed themselves, with a long grinding time and poor convenience. At the same time, when the tool length is worn and shortened, the tool often needs to extend a longer length, and the upper end of the tool will appear suspended. The tool is easy to retract after being subjected to force, which affects the processing quality. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a composite drilling tool for valve body processing, which can perform drilling and countersinking operations at the same time, has a split structure, and the twist drill and the processing blade can be replaced, and compensating support can be provided for the twist drill. The twist drill and the blade have overlapping parts, which reduces the processing cost of the valve body and has good processing quality, and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a composite drilling tool for valve body processing, comprising a tool handle;

[0005] Tool handle: A twist drill is installed inside the circular hole at the lower end of the tool handle, and a fixing screw is threadedly connected inside the threaded hole at the lower end of the outer arc surface of the tool handle. The fixing screw is arranged in cooperation with the twist drill. An avoidance groove is opened at the upper end of the outer arc surface of the twist drill, and a blade 1 is installed inside the tool groove 1 at the lower end of the tool handle through a screw 1. The rear end of the blade 1 of the avoidance groove is arranged in cooperation. During the processing of the valve body, the twist drill and the processing blade can be replaced. At the same time, the twist drill can provide compensatory support for its length after wear, so as to avoid the shrinkage of the twist drill during the processing, so as to be convenient to use. Partial replacement reduces the processing cost of the valve body. At the same time, the twist drill and the blade 1 have overlapping parts to avoid burrs at the edge of the orifice, so as to have good processing quality.

[0006] Furthermore, a positioning strip is provided at the lower end of the tool handle, and the rear end of the positioning strip is slidably connected to the avoidance groove, thereby ensuring that the twist drill and the tool handle rotate synchronously, thereby achieving a good positioning effect.

[0007] Furthermore, a rectangular groove is provided in the middle of the outer arc surface, a trapezoidal piece is slidably connected to the middle of the rectangular groove, an inclined groove is provided at the upper end of the twist drill, the trapezoidal piece is slidably connected to the inclined groove, and the inclined groove is connected to the avoidance groove, which can provide support for the upper end of the twist drill.

[0008] Furthermore, a fixing plate is provided at the front end of the rectangular groove, a fine-tuning screw is installed at the upper end of the fixing plate, the rear end of the fine-tuning screw is threadedly connected to the trapezoidal piece, and a positioning ring is provided in the middle of the outer arc surface of the fine-tuning screw. The positioning ring is located between the fixing plate and the trapezoidal piece to facilitate the adjustment of the position of the trapezoidal piece.

[0009] Furthermore, a blade 2 is installed inside the blade groove 2 on the rear side of the lower end of the handle through a screw 2, and a blade 3 is installed inside the blade groove 3 on the front side of the lower end of the handle through a screw 3, so that a larger plane can be processed.

[0010] Furthermore, the bottom edges of the blade one, the blade three and the blade two are flush, ensuring that the planes processed by the three are of the same height.

[0011] Furthermore, the length from the distal end of the lower edge of the second blade to the axis of the twist drill is not less than the length from the proximal end of the lower edge of the third blade to the axis of the twist drill, and the distance from the proximal end of the lower edge of the second blade to the axis of the twist drill is not greater than the distance from the distal end of the lower edge of the blade to the axis of the twist drill, so that a connected plane can be processed.

[0012] Compared with the prior art, the beneficial effects of the utility model are: the composite drilling tool for valve body processing has the following advantages:

[0013] 1. When in use, install the tool handle on the spindle of the valve body processing machine tool. The spindle drives the tool handle to rotate, and the tool handle drives the twist drill, blade one, blade three and blade two to rotate. The twist drill drills the flange of the valve body, and blade one, blade three and blade two countersink the surface of the valve body. The blade angle at the rear end of blade one can extend to the inside of the avoidance groove. During processing, the valve body can be drilled and countersunk at the same time, which greatly improves the processing efficiency of the valve body. At the same time, the twist drill and blade one have overlapping parts to avoid burrs at the edge of the orifice, and have good processing quality.

[0014] 2. When the twist drill is worn, the fixing screw can be loosened, the twist drill can be pulled out downward, and then the twist drill can be sharpened. After the sharpening is completed, the twist drill is re-inserted into the lower end of the shank and the inclined groove is in contact with the trapezoidal piece. Then the fine-tuning screw can be rotated. The fine-tuning screw pushes the trapezoidal piece to slide along the rectangular groove under the action of the positioning ring and the fixing plate. The beveled edge at the rear end of the trapezoidal piece slides relative to the side wall of the inclined groove, which pushes the twist drill downward, which can compensate for the length of the twist drill and provide support for the upper end of the twist drill. Then, the fixing screw is tightened to fix the twist drill. When blade one, blade three and blade two are worn, their own screws can be loosened. During the processing of the valve body, the twist drill and the processing blade can be replaced. At the same time, the twist drill can provide compensatory support for its length after being worn, so as to avoid the shrinkage of the twist drill during the processing, so that it is convenient to use, and partial replacement reduces the processing cost of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model when viewed from above;

[0017] Figure 3 This is a schematic cross-sectional view of the handle of the utility model;

[0018] Figure 4 This is an enlarged structural diagram of the utility model at A;

[0019] Figure 5 This is a schematic diagram of the structure of the twist drill of the utility model.

[0020] In the figure: 1 handle, 2 twist drill, 3 fixing screw, 4 blade one, 5 avoidance groove, 6 positioning strip, 7 blade two, 8 blade three, 9 rectangular groove, 10 fixing plate, 11 trapezoidal piece, 12 fine-tuning screw, 13 positioning ring, 14 oblique groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-5 ,This embodiment provides a technical solution: a composite drilling tool for valve body processing, comprising a tool handle 1;

[0023] Tool handle 1: A twist drill 2 is installed inside the circular hole at the lower end of the tool handle 1. The tool handle 1 is installed on the spindle of the valve body processing machine tool. The spindle drives the tool handle 1 to rotate, and the twist drill 2 drills the flange of the valve body. The threaded hole at the lower end of the outer arc surface of the tool handle 1 is threadedly connected with a fixing screw 3. The fixing screw 3 is arranged in conjunction with the twist drill 2. The fixing screw 3 facilitates the fixation of the twist drill 2. An avoidance groove 5 is provided at the upper end of the outer arc surface of the twist drill 2. A blade 4 is installed inside the knife groove 1 at the lower end of the tool handle 1 through a screw 1. The rear end of the blade 4 of the avoidance groove 5 is arranged in conjunction, and the blade angle at the rear end of the blade 4 can extend to the avoidance groove 5 The interior of the hole has good processing quality. A positioning strip 6 is provided at the lower end of the tool handle 1. The rear end of the positioning strip 6 is slidably connected to the avoidance groove 5. The positioning strip 6 can ensure that the twist drill 2 and the tool handle 1 rotate synchronously, and have a good positioning effect. A rectangular groove 9 is provided in the middle of the outer arc surface. A trapezoidal piece 11 is slidably connected to the middle of the rectangular groove 9. An oblique groove 14 is provided at the upper end of the twist drill 2. The trapezoidal piece 11 is slidably connected to the oblique groove 14. The oblique groove 14 is connected to the avoidance groove 5. The hypotenuse at the rear end of the trapezoidal piece 11 slides relative to the side wall of the oblique groove 14, which will push the twist drill 2 downward, and can compensate for the twist drill. 2, and at the same time provide support for the upper end of the twist drill 2, a fixing plate 10 is provided at the front end inside the rectangular groove 9, a fine-tuning screw 12 is installed on the upper end of the fixing plate 10, and the rear end of the fine-tuning screw 12 is threadedly connected with the trapezoidal piece 11, and a positioning ring 13 is provided in the middle of the outer arc surface of the fine-tuning screw 12, and the positioning ring 13 is located between the fixing plate 10 and the trapezoidal piece 11, and the fine-tuning screw 12 can be rotated. The fine-tuning screw 12 pushes the trapezoidal piece 11 to slide along the rectangular groove 9 under the action of the positioning ring 13 and the fixing plate 10, and a blade 2 7 is installed inside the second knife groove on the rear side of the lower end of the handle 1 through screw 2, and the lower end of the handle 1 A blade three 8 is installed inside the knife groove three on the front side by means of a screw three. The blade one 4, the blade three 8 and the blade two 7 countersink the surface of the valve body to process a larger plane. The lower edges of the blade one 4, the blade three 8 and the blade two 7 are flush to ensure that the planes processed by the multiple blades are of equal height. The length of the lower distal end of the blade two 7 from the axis of the twist drill 2 is not less than the length of the lower proximal end of the blade three 8 from the axis of the twist drill 2, and the distance of the lower proximal end of the blade two 7 from the axis of the twist drill 2 is not greater than the distance of the lower distal end of the blade one 4 from the axis of the twist drill 2, to ensure that the planes processed by the multiple blades are connected.

[0024] The working principle of a composite drilling tool for valve body processing provided by the utility model is as follows: when in use, the tool handle 1 is installed on the main shaft of the valve body processing machine tool, the main shaft drives the tool handle 1 to rotate, the tool handle 1 drives the twist drill 2, the blade 1 4, the blade 3 8 and the blade 2 7 to rotate, the twist drill 2 drills the flange of the valve body, the blade 1 4, the blade 3 8 and the blade 2 7 countersink the surface of the valve body, when the twist drill 2 is worn, the fixing screw 3 can be loosened, the twist drill 2 can be pulled out downward, and then the twist drill 2 can be sharpened. After the sharpening is completed, the twist drill 2 is re-inserted into the lower end of the tool handle 1 and the bevel is made. The groove 14 contacts with the trapezoidal piece 11, and then the fine-tuning screw 12 can be rotated. The fine-tuning screw 12 pushes the trapezoidal piece 11 to slide along the rectangular groove 9 under the action of the positioning ring 13 and the fixing plate 10. The hypotenuse at the rear end of the trapezoidal piece 11 slides relative to the side wall of the oblique groove 14, thereby pushing the twist drill 2 to move downward, which can compensate for the length of the twist drill 2 and provide support for the upper end of the twist drill 2. Then, the fixing screw 3 is tightened to complete the fixation of the twist drill 2. When the blade 1 4, the blade 3 8 and the blade 2 7 are worn, their own screws can be loosened and replaced, so that the use is convenient and the service life is long.

[0025] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A composite drilling tool for valve body machining, characterized in that: comprising a knife handle (1); The tool handle (1) has a twist drill (2) installed inside the circular hole at the lower end thereof, a fixing screw (3) is threadedly connected inside the threaded hole at the lower end of the outer arc surface of the tool handle (1), the fixing screw (3) is matched with the twist drill (2), an avoidance groove (5) is provided at the upper end of the outer arc surface of the twist drill (2), a blade (4) is installed inside the blade groove (1) at the lower end of the tool handle (1) via a screw (1), and the rear end of the blade (4) of the avoidance groove (5) is matched.

2. The composite drilling tool for valve body machining according to claim 1, characterized in that: A positioning strip (6) is provided at the lower end of the knife handle (1), and a rear end of the positioning strip (6) is slidably connected to the avoidance groove (5).

3. The composite drilling tool for valve body machining according to claim 1, characterized in that: A rectangular groove (9) is provided in the middle of the outer arc surface, a trapezoidal piece (11) is slidably connected to the middle of the rectangular groove (9), an oblique groove (14) is provided at the upper end of the twist drill (2), the trapezoidal piece (11) is slidably connected to the oblique groove (14), and the oblique groove (14) is connected to the avoidance groove (5).

4. The composite drilling tool for valve body machining according to claim 3, characterized in that: A fixing plate (10) is provided at the front end of the rectangular groove (9), a fine-tuning screw (12) is installed at the upper end of the fixing plate (10), a rear end of the fine-tuning screw (12) is threadedly connected to the trapezoidal piece (11), a positioning ring (13) is provided in the middle of the outer arc surface of the fine-tuning screw (12), and the positioning ring (13) is located between the fixing plate (10) and the trapezoidal piece (11).

5. The composite drilling tool for valve body machining according to claim 1, characterized in that: A second blade (7) is installed inside the second blade groove at the rear side of the lower end of the knife handle (1) via a second screw, and a third blade (8) is installed inside the third blade groove at the front side of the lower end of the knife handle (1) via a third screw.

6. The composite drilling tool for valve body machining according to claim 5, characterized in that: The lower edges of the blade one (4), the blade three (8) and the blade two (7) are flush.

7. The composite drilling tool for valve body machining according to claim 5, characterized in that: The distance between the distal end of the lower edge of the second blade (7) and the axis of the twist drill (2) is not less than the distance between the proximal end of the lower edge of the third blade (8) and the axis of the twist drill (2), and the distance between the proximal end of the lower edge of the second blade (7) and the axis of the twist drill (2) is not greater than the distance between the distal end of the lower edge of the first blade (4) and the axis of the twist drill (2).

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