Large-diameter excircle sleeve boring cutter

Abstract

The utility model belongs to the technical field of machining, and discloses a large-diameter outer circle sleeve boring cutter which comprises a cutter handle, the outer side end of the cutter handle is fixedly connected with a connecting handle, the outer side end of the connecting handle is detachably and fixedly connected with a sleeve cutter frame, the sleeve cutter frame is in a C shape, and the two ends of the sleeve cutter frame are provided with a first mounting groove and a second mounting groove correspondingly. Adjustable chamfering tool rests are detachably mounted in the first mounting groove and the second mounting groove, chamfering tool bits are detachably mounted on the adjustable chamfering tool rests, the chamfering tool bits are located close to the edge of the inner side of the sleeving tool rest, and an adjustable fine boring tool rest is detachably mounted in the second mounting groove. The adjustable chamfering tool rest and the adjustable fine boring tool rest are installed at the two ends of the sleeving tool rest correspondingly, combined machining of an outer circle and a chamfer can be achieved, the machining time is greatly shortened, the machining efficiency is improved, the dynamic balance of a tool is better, the structure is more stable, a PCD blade used for the chamfering tool rest is high in machining efficiency, and the quality of the machined surface is better.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical processing, more particularly to a large-diameter external circle bushing boring cutter. BACKGROUND

[0002] The boring cutter is a kind of hole processing cutter, generally has a round handle bar, and also has a larger workpiece using a square bar, which is generally used in a vertical lathe. The boring cutter is commonly used in hole processing, hole expansion, profiling, etc. In addition to being able to process the hole, it can also process the end face external circle. The existing boring cutter generally comprises a cutter body and a cutter head connected with the cutter body, and a blade mounting groove for mounting a boring blade is formed on both sides of the cutter head.

[0003] At present, a modular double-edge boring cutter has been widely used in the field of mechanical processing. Compared with the traditional integrated single-edge boring cutter, the modular double-edge boring cutter has more advantages. The design of the double-edge boring cutter is that two cutting edges participate in cutting at the same time, so that the processing efficiency is higher; the radial forces acting on the two symmetrical cutting edges cancel each other out, achieving a kind of cutting balance effect, so that the boring cutter body is not easy to vibrate, the size of the processed product is relatively stable, and the main shaft of the machine tool is well protected.

[0004] When processing a large-diameter external circle on a traditional vertical three-axis machining center, a conventional bushing boring cutter can only process an external circle of about 130, and the adjustment range is very small, the dynamic balance effect is very poor, the processing efficiency is low, and the quality is difficult to guarantee. On the other hand, the external circle is usually processed by a bushing cutter holder, and the chamfer is processed by a milling cutter. Because the chamfering part of the workpiece blank has a large amount of excess material, the milling processing time is long, the processing cost is high, and the chamfer surface processed by milling has poor quality and precision. CONTENT OF THE INVENTION

[0005] In order to solve the above problems, the present application provides a large-diameter external circle bushing boring cutter.

[0006] The large-diameter external circle bushing boring cutter provided by the present application adopts the following technical scheme:

[0007] A large-diameter external circle bushing boring cutter, comprising a cutter handle, a connecting handle fixedly connected to the outer side end of the cutter handle, a bushing cutter holder detachably fixedly connected to the outer side end of the connecting handle, the bushing cutter holder being C-shaped, first and second mounting grooves respectively provided at the two ends of the bushing cutter holder, an adjustable chamfer cutter holder detachably mounted in each of the first and second mounting grooves, a chamfer cutter head detachably mounted on the adjustable chamfer cutter holder, the chamfer cutter head being located close to the inner side edge of the bushing cutter holder, an adjustable fine boring cutter holder also detachably mounted in the second mounting groove, and a boring cutter head detachably mounted on the adjustable fine boring cutter holder, the boring cutter head being located close to the inner side edge of the distal end of the bushing cutter holder, and the tip of the boring cutter head protruding from the chamfer cutter head by a certain distance.

[0008] Further, the sleeve cutter holder comprises a central force arm and edge force arms arranged at both ends of the central force arm, and the two edge force arms have the same inclination angle towards the rotation direction.

[0009] Further, the edge force arms are provided with an inscribed groove on the side towards the rotation direction.

[0010] Further, the first mounting groove and the second mounting groove are located in the inscribed groove.

[0011] Further, the adjustable chamfer cutter holder is provided with a step adjusting screw and a diameter adjusting screw.

[0012] Further, the chamfer cutter head is a PCD cutter.

[0013] Further, the sleeve cutter holder is provided with a hollow groove on both sides of the central axis.

[0014] In summary, the present application has at least one of the following beneficial technical effects:

[0015] By mounting the adjustable chamfer cutter holder and the adjustable boring cutter holder at both ends of the sleeve cutter holder, the present application can realize the combined machining of the outer circle and the chamfer, greatly reducing the machining time, improving the machining efficiency, better balancing the cutter, and making the structure more stable. The PCD cutter used in the chamfer cutter holder has high machining efficiency and better machining surface quality. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a side structure schematic diagram of the present application;

[0017] Figure 2 is a front structure schematic diagram of the present application.

[0018] Explanation of figure marks:

[0019] 1, cutter handle; 2, connecting handle; 3, sleeve cutter holder; 31, first mounting groove; 32, second mounting groove; 33, central force arm; 34, edge force arm; 35, inscribed groove; 36, hollow groove; 4, adjustable chamfer cutter holder; 41, chamfer cutter head; 42, step adjusting screw; 43, diameter adjusting screw; 5, adjustable boring cutter holder; 51, boring cutter head. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] Embodiment 1:

[0024] The present application will be further described in detail below in conjunction with the drawings.

[0025] The embodiment of the present application discloses a large-diameter external circle bushing cutter, comprising a tool shank 1, the outer side end of the tool shank 1 is fixedly connected with a connecting handle 2, the outer side end of the connecting handle 2 is detachably fixedly connected with a sleeve cutter holder 3, the sleeve cutter holder 3 is C-shaped, both ends of the sleeve cutter holder 3 are respectively provided with a first mounting groove 31 and a second mounting groove 32, the first mounting groove 31 and the second mounting groove 32 are both detachably mounted with an adjustable chamfer tool holder 4, the upper part of the adjustable chamfer tool holder 4 is detachably mounted with a chamfer tool head 41, the chamfer tool head 41 is located close to the inner side edge of the sleeve cutter holder 3, the second mounting groove 32 is also detachably mounted with an adjustable fine boring tool holder 5, the upper part of the adjustable fine boring tool holder 5 is detachably mounted with a boring tool head 51, the boring tool head 51 is located close to the inner side edge of the end of the sleeve cutter holder 3, and the tip of the boring tool head 51 protrudes from the chamfer tool head 41 by a certain distance.

[0026] As a further preferred embodiment of the present embodiment, please refer to Figure 2 , the sleeve cutter holder 3 comprises a center force arm 33 and an edge force arm 34, the edge force arm 34 is arranged at both ends of the center force arm 33, and there is an inclination angle between the two edge force arms 34 and the center force arm 33 towards the rotation direction and the same.

[0027] As a further preferred embodiment of the present embodiment, please refer to Figure 2 , the edge force arm 34 is provided with an internal cutting groove 35 on the side towards the rotation direction.

[0028] As a further preferred embodiment of the present application, please refer to Figure 2 , the first installation groove 31 and the second installation groove 32 are both located in the inner cutting groove 35.

[0029] As a further preferred embodiment of the present application, please refer to Figure 1 , the adjustable chamfer tool holder 4 is provided with a step adjusting screw 42 and a diameter adjusting screw 43.

[0030] As a further preferred embodiment of the present application, the chamfer tool head 41 is a PCD tool bit.

[0031] As a further preferred embodiment of the present application, please refer to Figure 2 , the sleeve tool holder 3 is provided with a hollow groove 36 on each side of the central axis.

[0032] The implementation principle of the large-diameter external circle sleeve boring tool according to the embodiment of the present application is as follows: by installing the adjustable chamfer tool holder 4 and the adjustable fine boring tool holder 5 at both ends of the sleeve tool holder 3, the external circle and the chamfer can be machined at one time, the machining time is greatly reduced, the machining efficiency is improved, the dynamic balance of the tool is better, the structure is more stable, and the PCD tool bit used in the chamfer tool holder has high machining efficiency and better machining surface quality.

[0033] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A large-diameter outer cylindrical boring tool, comprising a tool holder (1), characterized in that: A connecting handle (2) is fixedly connected to the outer end of the handle (1). A sleeve tool holder (3) is detachably and fixedly connected to the outer end of the connecting handle (2). The sleeve tool holder (3) is C-shaped. A first mounting groove (31) and a second mounting groove (32) are respectively provided at both ends of the sleeve tool holder (3). An adjustable chamfered tool holder (4) can be detachably installed in both the first mounting groove (31) and the second mounting groove (32). A chamfering head (41) is detachably installed on the upper part of the tool holder (3). The chamfering head (41) is located near the inner edge of the tool holder (3). An adjustable fine boring tool holder (5) is also detachably installed in the second mounting groove (32). A boring head (51) is detachably installed on the adjustable fine boring tool holder (5). The boring head (51) is located near the inner edge of the end of the tool holder (3), and the tip of the boring head (51) protrudes a certain distance from the chamfering head (41).

2. The large-diameter outer cylindrical boring tool according to claim 1, characterized in that: The tool holder (3) includes a central lever arm (33) and an edge lever arm (34). The edge lever arms (34) are located at both ends of the central lever arm (33), and there is an inclination angle of the same direction of rotation between the two edge lever arms (34) and the central lever arm (33).

3. A large-diameter outer cylindrical boring tool according to claim 2, characterized in that: The edge lever (34) has an internal groove (35) on the side facing the direction of rotation.

4. A large-diameter outer cylindrical boring tool according to claim 3, characterized in that: The first mounting slot (31) and the second mounting slot (32) are both located in the inner groove (35).

5. A large-diameter outer cylindrical boring tool according to claim 1, characterized in that: The adjustable chamfering tool holder (4) has a step adjustment screw (42) and a diameter adjustment screw (43).

6. A large-diameter outer cylindrical boring tool according to claim 1, characterized in that: The chamfering head (41) has a PCD insert.

7. A large-diameter outer cylindrical boring tool according to claim 1, characterized in that: The tool holder (3) is provided with hollowed-out grooves (36) on both sides of the central axis.

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