Floating reamer handle and floating reamer assembly for reaming thin-walled tube

Abstract

The utility model relates to the technical field of floating reamers, in particular to a floating reamer handle and a floating reamer assembly used for machining reamed holes of thin-walled tubes. The floating reamer handle mainly comprises a main taper shank, a floating tool apron, a cone-shaped body and a limiting device, floating connection of the main taper shank and the floating tool apron is achieved through a thread fit clearance, and therefore the floating adjusting function of the reamer can be achieved. The floating reamer assembly is simple in structure and easy, convenient and rapid to operate, and the floating centering effect of the cutter during reaming of the thin-walled tube is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of floating reamers, and specifically, to a floating reamer shank and a floating reamer assembly for machining thin-walled pipe reaming. Background Art

[0002] Due to the thin-wall structure characteristics of thin-walled pipe parts, their machining rigidity is poor, the reaming size of ordinary tools for reaming is unstable, and the scrap rate is high. The reaming of thin-walled pipes has very high requirements for the coaxiality between the tool and the part axis, and the reaming tool needs to have a floating and adjustable function.

[0003] There are various floating reamers with different structures in the prior art. For example, the Chinese invention patent application with the publication number CN117444312A discloses a floating reaming device for a machine-clamped flexible shank; another example is the Chinese utility model patent with the publication number CN217045464U, which discloses a self-centering elastic floating reamer fixture. Summary of the Utility Model

[0004] In order to avoid the prior art barriers, the utility model provides a floating reamer shank different from the prior art, which mainly includes a main taper shank, a floating tool holder, a cone body, and a limiting device. The floating connection between the main taper shank and the floating tool holder is mainly realized through the thread fit clearance, so as to realize the floating adjustment function of the reamer; based on the above floating reamer shank, the utility model also provides a floating reamer assembly for machining thin-walled pipe reaming different from the prior art.

[0005] The utility model provides a floating reamer shank, including a main taper shank, a floating tool holder, a cone body, and a limiting device;

[0006] An inner taper hole is provided at the front part of the main taper shank, multiple opening grooves are provided at the opening part of the inner taper hole, and an external thread is provided on the outer cylindrical surface of the inner taper part;

[0007] The front end of the floating tool holder is used for installing a reamer, and an internal thread is provided at the tail of the floating tool holder;

[0008] The main taper shank and the floating tool holder are floatingly connected through an external thread and an internal thread with a thread fit clearance, and the thread fit clearance is greater than 0;

[0009] The cone body is installed in the inner taper hole of the main taper shank, and the bottom surface of the cone body is matched with the bottom surface of the inner cavity of the floating tool holder;

[0010] The limiting device is sleeved on the outer circle of the main taper shank and is used for axially limiting the floating tool holder.

[0011] To better implement the present utility model, the limiting device includes a limiting ring and a limiting screw; the limiting ring can slide on the outer ring of the main taper shank and is fastened by the limiting screw. That is to say, the limiting ring is fixedly installed on the outer ring of the main taper shank through the limiting screw, and is used for axially limiting the floating tool holder.

[0012] To better implement the present utility model, a square convex part convenient for screwing is provided at the front part of the floating tool holder.

[0013] To better implement the present utility model, the square convex part is an external hexagonal boss.

[0014] To better implement the present utility model, the tail of the main taper shank is a Morse taper shank.

[0015] To better implement the present utility model, the thread fit clearance is 0.2 mm.

[0016] To better implement the present utility model, the opening grooves are circumferentially and uniformly distributed along the opening part of the inner tapered hole.

[0017] To better implement the present utility model, the conical body is a frustum structure.

[0018] To better implement the present utility model, a tool mounting hole is provided at the front part of the floating tool holder.

[0019] The present utility model also provides a floating reamer assembly for machining thin-walled pipe reaming, including a reamer, the reamer is connected to the above-mentioned floating reamer shank, the tail of the reamer is inserted into the floating tool holder of the floating reamer shank, and is fastened by a radially arranged locking screw.

[0020] To better implement the present utility model, a tool mounting hole is provided at the front part of the floating tool holder, and the locking screw is installed in the tool mounting hole.

[0021] The present utility model has the following beneficial effects.

[0022] (1) The floating reamer shank of the present utility model can realize the adjustment of the floating reamer through the adjustment of the thread fit clearance, with a simple structure and convenient and quick operation.

[0023] (2) The floating reamer assembly of the present utility model realizes the effect of tool floating centering during thin-walled pipe reaming. Description of the Drawings

[0024] The specific structure of the present utility model is given by the following embodiments and their accompanying drawings, but the present application is not limited to the scope of the described embodiments.

[0025] Figure 1It is a cross-sectional view of a floating reamer for processing thin-walled tubes on a new type of lathe of the present utility model.

[0026] Figure 2 It is a cross-sectional view of the main taper shank of a floating reamer for processing thin-walled tubes on a new type of lathe of the present utility model.

[0027] Figure 3 It is a cross-sectional view of the floating tool holder of a floating reamer for processing thin-walled tubes on a new type of lathe of the present utility model.

[0028] Figure 4 It is a three-dimensional structure diagram of the main taper shank of a floating reamer for processing thin-walled tubes on a new type of lathe of the present utility model.

[0029] Figure 5 It is a three-dimensional structure diagram of the floating tool holder of a floating reamer for processing thin-walled tubes on a new type of lathe of the present utility model.

[0030] Figure 6 It is a three-dimensional structure diagram of the cone body of a floating reamer for processing thin-walled tubes on a new type of lathe of the present utility model.

[0031] Figure 7 It is a three-dimensional structure diagram of the limit ring of a floating reamer for processing thin-walled tubes on a new type of lathe of the present utility model.

[0032] Description of the numbers in the figure: 1. Main taper shank; 11. Open slot; 12. External thread; 2. Floating tool holder; 21. Internal thread; 22. External hexagonal boss; 3. Cone body; 4. Limit ring; 5. Limit screw; 6. Reamer; 7. Locking screw. Detailed implementation manners

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. It should be understood that the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments, and therefore should not be regarded as a limitation of the protection scope. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "set", "connected", and "connected" 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 also be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] Example 1:

[0036] This example presents a floating reamer shank, which includes a main taper shank 1, a floating tool holder 2, a conical body 3, and a limiting device.

[0037] An inner taper hole is provided at the front of the main taper shank 1. Multiple opening grooves 11 are provided at the opening of the inner taper hole, and an external thread 12 is provided on the outer cylindrical surface of the inner taper part;

[0038] The front end of the floating tool holder 2 is used to install a reamer 6, and an internal thread 21 is provided at the tail of the floating tool holder 2;

[0039] The main taper shank 1 and the floating tool holder 2 are floatingly connected through the external thread 12 and the internal thread 21 with a thread fit clearance, and the thread fit clearance is greater than 0;

[0040] The conical body 3 is installed in the inner taper hole of the main taper shank 1, and the bottom surface of the conical body 3 is matched with the bottom surface of the inner cavity of the floating tool holder 2;

[0041] The limiting device is sleeved on the outer ring of the main taper shank 1 and is used for axially limiting the floating tool holder 2.

[0042] The conical body 3 is placed in and matched with the inner taper hole of the main taper shank 1. The floating tool holder 2 and the main taper shank 1 are threadedly connected, and the floating tool holder 2 squeezes the conical body 3 during the process of screwing in the thread. The conical body 3 squeezes the inner taper hole of the main taper shank 1 to cause radial expansion deformation of the thread of the main taper shank 1, so that the floating adjustment function of the reamer 6 can be realized by adjusting the thread fit clearance between the main taper shank 1 and the floating tool holder 2.

[0043] In another specific embodiment, the limiting device includes a limiting ring 4 and a limiting screw 5; the limiting ring 4 can slide on the outer ring of the main taper shank 1 and is fastened by the limiting screw 5. That is to say, the limiting ring 4 is fixedly installed on the outer ring of the main taper shank 1 through the limiting screw 5 and is used for axially limiting the floating tool holder 2.

[0044] In another specific embodiment, a square convex part for easy screwing is provided at the front of the floating tool holder 2.

[0045] In another specific embodiment, the square convex part is an external hexagonal boss 22.

[0046] In another specific embodiment, the tail of the main taper shank 1 is a Morse taper shank.

[0047] In another specific embodiment, the thread fit clearance is 0.2 mm.

[0048] In another specific embodiment, the opening grooves 11 are circumferentially distributed uniformly along the opening of the inner tapered hole.

[0049] In another specific embodiment, the cone body 3 is a frustum structure.

[0050] In another specific embodiment, a tool mounting hole is provided at the front part of the floating tool holder 2.

[0051] Embodiment 2:

[0052] On the basis of Embodiment 1, this embodiment provides a floating reamer assembly for machining thin-walled tube reaming, including a reamer 6 and a floating reamer handle. The floating reamer handle adopts the structure described in Embodiment 1. The tail of the reamer 6 is inserted into the floating tool holder 2 of the floating reamer handle and fastened by a radially arranged locking screw 7.

[0053] In another specific embodiment, a tool mounting hole is provided at the front part of the floating tool holder 2, and the locking screw 7 is installed in the tool mounting hole.

[0054] Other parts of this embodiment are the same as those of Embodiment 1, so they will not be described in detail.

[0055] Embodiment 3:

[0056] On the basis of Embodiment 2, this embodiment provides a specific structure of a floating reamer assembly.

[0057] The floating reamer assembly includes a main taper shank 1, a floating tool holder 2, a cone body 3, a limit ring 4, a limit screw 5, a reamer 6, and a locking screw 7.

[0058] The Morse taper shank at the tail of the main taper shank 1 is used to connect with the lathe tailstock. The external thread 12 on the outer cylindrical surface at the front part of the main taper shank 1 is in threaded fit with the internal thread 21 of the floating tool holder 2, and the threaded fit clearance is 0.2. The inner cavity of the main taper shank 1 is an inner tapered hole, and there are four evenly distributed opening grooves 11 at the mouth of the main taper shank 1. This structure enables the external thread 12 of the main taper shank 1 to be easily deformed radially. The cone body 3 is inserted into the inner tapered hole of the main taper shank 1 for cooperation, and the other end of the cone body 3 is in contact with the bottom surface of the inner cavity of the floating tool holder 2. The front part of the floating tool holder 2 is inserted into the reamer 6 and fixed by a locking screw 7. There is an external hexagonal boss 22 at the front part of the floating tool holder 2 for turning and rotating the floating tool holder 2. The limit ring 4 is in sliding fit with the outer cylindrical surface of the main taper shank 1. The limit ring 4 abuts against the end face at the tail of the floating tool holder 2 and is locked by a limit screw 5 to achieve the limit function.

[0059] When performing floating reaming on thin-walled tubes, insert the reamer 6 into the floating tool holder 2 and fix it with the locking screw 7. Use a wrench to rotate the external hexagonal boss 22 at the front of the floating tool holder 2, so that the internal thread 21 of the floating tool holder 2 is screwed into the external thread 12 of the main taper shank 1. During the process of the floating tool holder 2 screwing into the main taper shank 1, the tapered body 3 is extruded to displace along the axis, and the tapered body 3 displaces along the axis to extrude the internal tapered hole of the main taper shank 1. Since there is an opening groove 11 at the mouth of the inner cavity of the main taper shank 1, the external thread 12 of the main taper shank 1 is radially deformed and expanded due to the extrusion of the tapered body 3 on the inner cavity of the main taper shank 1. The deformation and expansion of the external thread 12 of the main taper shank 1 are used to adjust the thread fit clearance between the main taper shank 1 and the floating tool holder 2. After adjusting the clearance, press the limit ring 4 against the end face at the tail of the floating tool holder 2 and lock the limit with the limit screw 5.

[0060] In this embodiment, by adjusting the thread fit clearance between the main taper shank 1 and the floating tool holder 2, the adjustment function of the floating range of the floating reamer assembly can be realized, so as to realize the floating reaming processing of thin-walled tubes.

[0061] Other parts of this embodiment are the same as those of the above-mentioned Embodiment 1 and Embodiment 2, so they will not be described in detail.

[0062] The above is only a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Any simple modification and equivalent change made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A floating reamer handle, comprising a main taper handle (1) and a floating tool holder (2); characterized in that: It also includes a cone (3) and a limiting device; The front portion of the main tapered shank (1) is provided with an inner tapered hole, the opening portion of the inner tapered hole is provided with a plurality of opening grooves (11), and the outer cylindrical surface of the inner tapered portion is provided with an external thread (12); The front end of the floating tool holder (2) is used to mount a reamer (6), and the rear end of the floating tool holder (2) is provided with an internal thread (21); The main taper shank (1) and the floating tool holder (2) are floatingly connected via an external thread (12) and an internal thread (21) having a thread matching clearance, and the thread matching clearance is greater than 0; The conical body (3) is installed in the inner conical hole of the main conical shank (1), and the bottom surface of the conical body (3) matches the bottom surface of the inner cavity of the floating tool holder (2); The limiting device is externally mounted on the outer ring of the main tapered shank (1) and is used to axially limit the floating tool holder (2).

2. A floating reamer handle according to claim 1, characterized in that: The front part of the floating knife seat (2) is provided with a square protrusion which is convenient for screwing.

3. A floating reamer handle according to claim 2, characterized in that: The square convex portion is an outer hexagonal boss (22).

4. The floating reamer handle according to claim 1, characterized in that: The tail of the main taper shank (1) is a Morse taper shank.

5. The floating reamer handle according to claim 1, characterized in that: The thread matching clearance is 0.2 mm.

6. The floating reamer handle according to claim 1, characterized in that: The opening grooves (11) are evenly distributed along the circumference of the opening of the inner tapered hole.

7. The floating reamer handle according to claim 1, characterized in that: The cone (3) is a frustum structure.

8. The floating reamer handle according to claim 1, characterized in that: A tool mounting hole is provided at the front of the floating tool seat (2).

9. A floating reamer assembly for reaming a thin-walled tube, comprising a reamer (6), characterized in that: The reamer (6) is connected to the floating reamer handle according to any one of claims 1 to 8, and the tail of the reamer (6) is inserted into the floating tool seat (2) of the floating reamer handle and fastened by a radially arranged locking screw (7).

10. A floating reamer assembly for reaming thin-walled pipes according to claim 9, characterized in that: A tool mounting hole is provided at the front of the floating tool seat (2), and the locking screw (7) is installed in the tool mounting hole.

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