Lathe broaching tool

Abstract

The utility model discloses a lathe chambering tool which comprises a tool handle, a tool bar, a tool and a connecting screw, the first end of the tool handle is connected to the second end of the tool bar, and the second end of the tool handle is used for being connected to a tool rest on a lathe. A first end of the cutter bar is provided with an open hole matched with the section shape of the cutter in the radial direction of the cutter bar, the cutter is inserted into the open hole, the two ends of the cutter extend out of the open hole, and a first threaded hole and a second threaded hole are formed in the cutter bar and located at the position of the open hole in the axial direction of the cutter bar. The first threaded hole extends to the end face of the first end of the cutter bar and communicates with the left inner side wall of the open hole, the second threaded hole communicates with the right inner side wall of the open hole, and the hole diameter center of the first threaded hole, the hole diameter center of the second threaded hole and the axis of the cutter bar are located on the same straight line. The third threaded hole, the first threaded hole and the second threaded hole are matched with one another.

Description

Technical Field

[0001] The utility model belongs to the technical field of lathe processing, and particularly relates to a lathe hole enlarging tool. Background Art

[0002] A lathe is a machine tool that mainly uses a turning tool to turn a rotating workpiece. Drills, reamer drills, reamers, taps, dies and knurling tools can also be used on a lathe for corresponding processing. The processing of the inner hole of a workpiece is an important part of metal processing, and processing the inner hole of a workpiece on a lathe is a common occurrence. In the prior art, when processing a large-diameter workpiece on a lathe, a large drill is used to process the workpiece so that the workpiece has a large aperture. When a large drill is used to process the workpiece, the large drill is rotated and drilled into the workpiece on the lathe. Due to the high hardness of the workpiece, the part of the large drill that is cut is usually worn very quickly. When the large drill is worn and used again, the entire cutting speed will slow down, and the surface of the workpiece hole processed will not be smooth, causing the workpiece to fail to meet the use requirements. Therefore, after the large drill is worn, the part of the large drill that is cut needs to be ground, but after multiple grindings, the large drill is easy to be difficult to clamp on the lathe and the grinding time is long. In order to increase the processing speed of the workpiece, a new large drill bit is used, but the large drill bit is relatively expensive. Therefore, a lathe hole enlarging tool is urgently needed to process large-diameter workpieces. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides a lathe hole enlarging tool to solve the problem of how to enlarge the hole of a workpiece in the prior art.

[0004] In order to solve the above-mentioned purpose, the utility model provides a lathe reaming tool, which includes a tool handle, a tool rod, a tool and a connecting screw. The first end of the tool handle is connected to the second end of the tool rod, and the second end of the tool handle is used to connect to the tool holder on the lathe. The first end of the tool rod is provided with an opening along the radial direction of the tool rod that matches the cross-sectional shape of the tool. The tool is inserted into the opening, and the two ends of the tool extend out of the opening.

[0005] A first threaded hole and a second threaded hole are provided inside the tool rod and at the position of the opening along the axial direction of the tool rod, the first threaded hole extends to the first end face of the tool rod and is connected to the left inner wall of the opening, the second threaded hole is connected to the right inner wall of the opening, and the aperture centers of the first threaded hole and the second threaded hole are located on the same straight line as the axis of the tool rod.

[0006] A third threaded hole is formed on the tool, and the third threaded hole, the first threaded hole and the second threaded hole match each other.

[0007] The connecting screw is screwed into the first threaded hole, the third threaded hole and the second threaded hole in sequence from the first end surface of the tool rod to fix the tool to the first end of the tool rod.

[0008] Preferably, the length of the first end of the tool extending from the opening is longer than the length of the second end of the tool extending from the opening, and a blade is formed on the first end of the tool, and the blade is used to contact the workpiece to expand the workpiece.

[0009] Preferably, the tool handle is tapered to form a tapered tool handle, wherein the large end surface of the tapered tool handle is connected to the tool rod, and the small end surface of the tapered tool handle is connected to the tool holder on the lathe.

[0010] Preferably, the reaming tool further comprises a cooling water supply unit and a cooling water pipe connected to the cooling water supply unit, and the cooling water pipe obtains cooling water from the cooling water supply unit and delivers cooling water to the tool.

[0011] Preferably, the radial length of the first end of the tool rod is smaller than the diameter of the hole to be expanded on the workpiece, so that the first end of the tool rod can extend into the hole to be expanded on the workpiece.

[0012] The lathe hole enlarging tool provided by the utility model, when enlarging a workpiece, fixes the tool to the tool rod through a connecting screw, fixes the tool handle to the tool holder on the lathe, installs the workpiece to be enlarged on the lathe, rotates the workpiece, and then moves the tool handle through the tool holder so that the tool on the tool handle gradually approaches the workpiece. Since the workpiece is rotating, when the tool gradually approaches the rotating workpiece, the hole enlarging process of the workpiece can be completed. Compared with the prior art of enlarging a workpiece using a drill bit, the lathe hole enlarging tool provided by the utility model can enlarge the workpiece, avoid using a large drill bit, and reduce processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following will briefly introduce the drawings required for the description of the embodiment. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0014] Figure 1 It is a structural schematic diagram of the hole expansion tool provided in an embodiment of the utility model;

[0015] Figure 2It is a schematic diagram of the internal structure of the first end of the knife rod provided by an embodiment of the utility model;

[0016] Figure 3 It is a structural schematic diagram of a tool provided by an embodiment of the utility model;

[0017] Figure 4 It is a structural schematic diagram of a tool provided by another embodiment of the utility model;

[0018] Figure 5a This is a schematic diagram of a state where the hole expansion tool provided by an embodiment of the utility model has not yet cut;

[0019] Figure 5b This is a schematic diagram of the working state of the hole expansion tool provided by the embodiment of the utility model in cutting;

[0020] Figure 5c This is a schematic diagram of the working state of the hole expansion tool provided by the embodiment of the utility model in cutting;

[0021] Figure 5d It is a schematic diagram of the state in which the hole enlarging tool provided in the embodiment of the utility model completes cutting. DETAILED DESCRIPTION

[0022] 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.

[0023] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inside", "outside", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is a description of the embodiments of the present invention based on its overall structure.

[0026] Figure 1 is a schematic diagram of the structure of the hole expansion tool provided in the embodiment of the utility model, Figure 2 This is a schematic diagram of the internal structure of the first end of the knife rod provided by the embodiment of the utility model, see Figure 1 and Figure 2 The reaming tool includes a tool handle 1, a tool rod 2, a tool 3 and a connecting screw 4. The first end of the tool handle 1 is connected to the second end of the tool rod 2. The second end of the tool handle 1 is used to be connected to the tool holder on the lathe. The first end of the tool rod 2 is provided with an opening 20 that matches the cross-sectional shape of the tool 3 along the radial direction of the tool rod 2. The tool 3 is inserted into the opening 20, and the two ends of the tool 3 extend out of the opening 20.

[0027] In this embodiment, see Figure 1 and Figure 2 The length of the first end of the tool 3 extending from the opening 20 is longer than the length of the second end of the tool 3 extending from the opening 20. A blade 31 is formed on the first end of the tool 3, and the blade 31 is used to contact the workpiece to expand the workpiece.

[0028] In some other embodiments, the two ends of the tool 3 extend out of the opening 20 by equal lengths, and blades 31 are formed on both ends of the tool 3, and the blades 31 at both ends of the tool 3 are used to expand the hole of the workpiece.

[0029] Compared with using the blades 31 at both ends of the tool 3 to expand the hole, using the blade 31 at one end of the tool 3 to expand the hole can reduce the manufacturing cost of the tool 3 while satisfying the hole expansion process for the workpiece.

[0030] Figure 5a This is a schematic diagram of the state where the hole expansion tool provided by the embodiment of the utility model has not yet cut. Figure 5a The radial length of the first end of the tool rod 2 is smaller than the diameter of the hole 70 on the workpiece 7 to be expanded, so that the first end of the tool rod 2 can extend into the hole 70 on the workpiece to be expanded.

[0031] See also Figure 5a Specifically, when only the blade 31 at one end of the tool 3 is used for hole expansion, the end of the tool 3 without the blade does not contact the hole wall of the hole 70 on the workpiece 7 to be expanded. This setting is to prevent the end of the tool 3 without the blade from scratching the workpiece 7.

[0032] Figure 3 This is a schematic diagram of the structure of the tool provided by the embodiment of the utility model, see Figure 3 The blade 31 formed on the tool 3 is an oblique blade, and the setting of this blade can cut chips from the workpiece in the horizontal direction.

[0033] Figure 4 This is a schematic diagram of the structure of a tool provided by another embodiment of the utility model, see Figure 4 In an optional embodiment, the blade 31 on the tool 3 is made as follows Figure 4 The flat blade 31 is ground flat relative to the other end of the tool 3. A grinder can be used to grind one end of the tool 3 to form a Figure 4 The blade shown can also be used to expand the hole of a rotating workpiece in the horizontal direction.

[0034] See also Figure 2 A first threaded hole 21 and a second threaded hole 22 are provided inside the tool rod 2 and at the position of the opening 20 along the axial direction of the tool rod 2. The first threaded hole 21 extends to the first end face of the tool rod 2 and is connected to the left inner wall of the opening 20, and the second threaded hole 22 is connected to the right inner wall of the opening 20. The aperture centers of the first threaded hole 21 and the second threaded hole 22 are located on the same straight line as the axis of the tool rod 2.

[0035] See also Figure 2 and Figure 3 A third threaded hole 30 is formed on the tool 3 , and the third threaded hole 30 , the first threaded hole 21 and the second threaded hole 22 match each other.

[0036] See also Figure 1 , Figure 2 and Figure 3 The connecting screw 4 is screwed into the first threaded hole 21 , the third threaded hole 30 and the second threaded hole 22 in sequence from the first end face of the tool rod 2 to fix the tool 3 to the first end of the tool rod 2 .

[0037] Specifically, the first threaded hole 21 , the second threaded hole 22 and the third threaded hole 30 are threaded holes with the same parameters, and the threaded holes cooperate with the connecting screws 4 so that the connecting screws 4 can fix the tool 3 to the tool rod 2 .

[0038] See also Figure 4 In a tool 3 provided in another embodiment of the present invention, the tool 3 is also provided with a third threaded hole 30 having the same parameters as the first threaded hole 21 and the second threaded hole 22 .

[0039] See also Figure 1 In this embodiment, the tool handle 1 is tapered to form a tapered tool handle, wherein the large end surface of the tapered tool handle is connected to the tool rod 2, and the small end surface of the tapered tool handle is connected to the tool holder 8 on the lathe.

[0040] See also Figure 1 In a preferred embodiment, the reaming tool further includes a cooling water supply unit 5 and a cooling water pipe 6 connected to the cooling water supply unit 5 , and the cooling water pipe 6 obtains cooling water from the cooling water supply unit 5 and delivers cooling water to the tool 3 .

[0041] Specifically, at the production site, the cooling water pipe 6 is made of a harder plastic so that the cooling water pipe does not need to be supported at the tool. The position of the cooling water pipe relative to the tool can also be manually adjusted so that the cooling water is accurately poured onto the tool. A softer metal cooling pipe can also be used. The cooling water supply unit 5 can use a cold water tank, and cooling water can be added to the cold water tank. After the cooling water pipe 6 is connected to the cold water tank, it can be pumped by a water pump.

[0042] Next, this embodiment combines Figures 5a to 5d The working process of the hole expansion tool is described in detail to enable those skilled in the art to better understand the utility model, as follows:

[0043] Figure 5a This is a schematic diagram of the state where the hole expansion tool provided by the embodiment of the utility model has not yet cut. Figure 5a, connect the tool handle 1 in the reaming tool to the tool holder on the lathe, and install the workpiece 7 on the spindle of the lathe, align the tool rod 2 with the hole 70 on the workpiece 7, and then rotate the workpiece 7 in the direction of arrow B in the figure, and at the same time operate the lathe to move the tool rod 2 in the direction of arrow A in the figure, that is, to the left.

[0044] Figure 5b and 5c FIG. 1 is a schematic diagram of the working state of the hole enlarging tool provided by the embodiment of the utility model in cutting, referring to FIG. Figure 5b and Figure 5c , the tool bar 2 moves to the left and contacts the workpiece 7. When the workpiece 7 rotates, the blade 31 on the tool 3 cuts the workpiece 7 to obtain an expanded hole area 71, which is connected to the original hole 70 on the workpiece 7. During the cutting process, the end of the tool 3 without the blade does not contact the inner wall of the hole 70, and the end face of the tool bar 2 can extend into the hole 70 without contacting the inner wall of the hole 70.

[0045] Figure 5d This is a schematic diagram of the state where the hole enlarging tool provided in the embodiment of the utility model has completed cutting, see Figure 5d After the workpiece 7 is expanded, the tool bar 2 is Figure 5d The tool 3 moves in the direction of the middle arrow A, i.e., moves to the right, so that the tool 3 withdraws from the obtained reaming area 71. During the withdrawal of the tool 3, the workpiece 7 can still be rotated, so that the tool 3 can cut the burrs and the like remaining on the inner wall of the reaming area 71 during the withdrawal process, thereby ensuring that the inner wall of the reaming area 71 is smooth. When the tool 3 is completely withdrawn, the reaming process of the workpiece 7 is completed.

[0046] To sum up, compared with the prior art of using a drill bit to expand the hole of a workpiece, the lathe hole expanding tool provided by the utility model can expand the hole of the workpiece, avoid the use of a large drill bit, and reduce processing costs.

[0047] The foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of explanation and illustration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various selections and changes to the embodiments without creative contribution as needed after reading this specification without departing from the principles and purpose of the present invention, but they are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A lathe hole enlarging tool, characterized in that: The lathe hole-reaming tool comprises a tool handle (1), a tool rod (2), a tool (3) and a connecting screw (4); the first end of the tool handle (1) is connected to the second end of the tool rod (2); the second end of the tool handle (1) is used to be connected to a tool holder on a lathe; the first end of the tool rod (2) is provided with an opening (20) matching the cross-sectional shape of the tool (3) along the radial direction of the tool rod (2); the tool (3) is inserted into the opening (20) so that both ends of the tool (3) extend out of the opening (20); A first threaded hole (21) and a second threaded hole (22) are provided inside the knife rod (2) and at the position of the opening (20) along the axial direction of the knife rod (2); the first threaded hole (21) extends to the end surface of the first end of the knife rod (2) and the first threaded hole (21) is connected to the left inner wall of the opening (20); the second threaded hole (22) is connected to the right inner wall of the opening (20); the aperture centers of the first threaded hole (21) and the second threaded hole (22) are located on the same straight line as the axis of the knife rod (2); The tool (3) is provided with a third threaded hole (30), and the third threaded hole (30), the first threaded hole (21) and the second threaded hole (22) match each other; The connecting screw (4) is screwed into the first threaded hole (21), the third threaded hole (30) and the second threaded hole (22) in sequence from the first end surface of the tool rod (2) to fix the tool (3) to the first end of the tool rod (2).

2. The lathe hole enlarging tool according to claim 1, characterized in that: The length of the first end of the tool (3) extending from the opening (20) is longer than the length of the second end of the tool (3) extending from the opening (20), and a blade (31) is formed on the first end of the tool (3), and the blade (31) is used to contact a workpiece to expand the hole of the workpiece.

3. The lathe hole enlarging tool according to claim 1, characterized in that: The tool handle (1) is tapered to form a tapered tool handle, wherein the large end face of the tapered tool handle is connected to the tool rod (2), and the small end face of the tapered tool handle is connected to the tool holder on the lathe.

4. The lathe hole enlarging tool according to claim 1, characterized in that: The lathe hole enlarging tool also includes a cooling water supply unit (5) and a cooling water pipe (6) connected to the cooling water supply unit (5), wherein the cooling water pipe (6) obtains cooling water from the cooling water supply unit (5) and delivers cooling water to the tool (3).

5. The lathe hole enlarging tool according to claim 1, characterized in that: The radial length of the first end of the tool rod (2) is smaller than the diameter of the hole to be expanded on the workpiece, so that the first end of the tool rod (2) can extend into the hole to be expanded on the workpiece.

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