Boring bar reinforcement device

Abstract

The utility model provides a kind of boring bar reinforcing device, which has good reinforcing effect on boring bar, is easy to install and manufacture, and relates to the technical field of machining.The boring bar reinforcing device includes a boring bar sleeve, one end of the boring bar sleeve is provided with a mounting hole extending along the axis direction of the boring bar sleeve;along the axis direction of the boring bar sleeve, at least one boring bar support unit is installed on the pipe wall of the boring bar sleeve, the boring bar support unit includes at least two boring bar support screws arranged circumferentially along the boring bar sleeve;the boring bar support screw is arranged radially along the boring bar sleeve and is threadedly connected with the boring bar sleeve, so as to be movable towards or away from the center of the boring bar sleeve;one end of the boring bar support screw close to the center of the boring bar sleeve is provided with a boring bar support plate rotatably connected therewith, so as to be rotatable around the axis of the boring bar support screw.The utility model not only has better reinforcing effect on boring bar, but also has lower manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically a boring bar reinforcement device. Background Technology

[0002] Currently, when the boring bar overhang approaches its stroke limit on a floor-type boring machine, the rigidity of the machining system decreases rapidly due to the machine tool's structure. This is especially true for CNC floor-type boring machines with long boring bar overhangs that require two-axis or three-axis simultaneous machining. The insufficient rigidity of the boring bar leads to not only shallow milling depths and low machining efficiency, but also severe vibration of the boring bar and cutting tool when increasing the depth of cut, feed rate, or spindle speed. This results in unstable cutting, vibration marks on the machined surface, and easy damage to the cutting tool. Furthermore, continuous, large-amplitude vibrations during machining can cause loss of machine tool accuracy or damage to the boring bar. Therefore, it is necessary to increase the rigidity of the boring bar when its overhang approaches its stroke limit to overcome these difficulties.

[0003] To increase the rigidity of the tool holder, Chinese patent application CN212191287U discloses a boring bar for preventing damage to boring tool fixtures, which involves fitting a reinforcing sleeve onto the tool holder. While this solution strengthens the tool holder with the reinforcing sleeve, the tool holder needs to rotate and extend relative to the slide, requiring only a clearance fit between the reinforcing sleeve and the tool holder. Therefore, the reinforcing effect of the sleeve on the tool holder is relatively poor. Furthermore, the above structure places high demands on the machining and installation accuracy of the reinforcing sleeve, and the reinforcement structure is complex to install and has high manufacturing costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a boring bar strengthening device that has a good strengthening effect, is easy to install and manufacture.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a boring bar strengthening device, including a boring bar sleeve, one end of which is provided with a mounting hole extending along the axial direction of the boring bar sleeve;

[0006] Along the axial direction of the boring bar sleeve, at least one boring bar support unit is installed on the tube wall of the boring bar sleeve. The boring bar support unit includes at least two boring bar support screws arranged circumferentially along the boring bar sleeve to support and fix the boring bar inside the boring bar sleeve.

[0007] The boring bar support screw is arranged radially along the boring bar sleeve and is threadedly connected to the boring bar sleeve so that it can move towards or away from the center of the boring bar sleeve; a boring bar support plate is provided at one end of the boring bar support screw near the center of the boring bar sleeve so that it can rotate around the axis of the boring bar support screw.

[0008] Furthermore, the boring bar support screw of the same boring bar support unit is arranged on the same outer circle of the boring bar sleeve.

[0009] Furthermore, the boring bar support unit includes six boring bar support screws evenly distributed around the circumference of the boring bar sleeve.

[0010] Furthermore, at least two boring bar support units are installed on the wall of the boring bar sleeve, and the boring bar support screws of two adjacent boring bar support units are arranged in a one-to-one correspondence.

[0011] Furthermore, there are two boring bar support units, which are respectively disposed at both ends of the boring bar sleeve.

[0012] Furthermore, the boring bar sleeve includes a tube body and a mounting ring sleeved on one end of the tube body, and the mounting hole is provided on the mounting ring.

[0013] Furthermore, the end face of the mounting ring is provided with a protruding locating pin for insertion and engagement with the boring machine spindle.

[0014] The beneficial effects of this utility model are as follows: The boring bar strengthening device of this utility model uses a radially adjustable boring bar support screw 2 installed on the boring bar sleeve 1 to support and strengthen the boring bar. The boring bar sleeve 1 can achieve surface contact with the boring bar through the boring bar support screw 2 and the boring bar support plate 21. This not only provides a better strengthening effect for the boring bar, but also reduces the requirements for the machining accuracy and installation accuracy of the boring bar sleeve 1. It is easy to install, easy to manufacture, and has a lower production cost. Attached Figure Description

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

[0016] Figure 2 yes Figure 1 The left view;

[0017] Figure 3 This is a schematic diagram of the present invention in use;

[0018] The figure shows: boring bar sleeve 1, boring bar support screw 2, spindle 3, boring bar 4, tube body 11, mounting ring 12, mounting hole 121, positioning pin 122, and boring bar support plate 21. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1 and Figure 2As shown, the boring bar strengthening device of this utility model includes a boring bar sleeve 1. One end of the boring bar sleeve 1 is provided with a mounting hole 121 extending along the axial direction of the boring bar sleeve 1. Along the axial direction of the boring bar sleeve 1, at least one boring bar support unit is installed on the tube wall of the boring bar sleeve 1. The boring bar support unit includes at least two boring bar support screws 2 arranged circumferentially along the boring bar sleeve 1 to support and fix the boring bar inside the boring bar sleeve 1. The boring bar support screws 2 are arranged radially along the boring bar sleeve 1 and are threadedly connected to the boring bar sleeve 1 through their threads, so as to be able to move towards or away from the center of the boring bar sleeve 1. The end of the boring bar support screw 2 near the center of the boring bar sleeve 1 is provided with a boring bar support plate 21 rotatably connected to it, so as to be able to rotate around the axis of the boring bar support screw 2. The boring bar support plate 21 can be a straight plate or an arc-shaped plate adapted to the surface of the boring bar.

[0021] It should be noted that this utility model is applicable to floor-type boring machines where the boring bar 4 is slidably mounted within the spindle 3 via a spline structure. In this type of boring machine, the boring bar and the spindle do not rotate relative to each other, but can slide axially relative to the spindle. For example... Figure 3 As shown, in use, the boring bar sleeve 1 is fitted onto the boring bar 4. The boring bar sleeve 1 is fixed to the end face of the spindle 3 by bolts, with the bolts passing through the mounting holes 121. When the spindle 3 drives the boring bar 4 to rotate, it also drives the boring bar sleeve 1 to rotate synchronously. When the boring bar 4 extends too far relative to the spindle 3 and needs reinforcement, the boring bar support screws 2, which are set around the circumference of the wall of the boring bar sleeve 1, are tightened, causing them to move closer to the center of the boring bar sleeve 1 until the boring bar support plate 21 at its end abuts against the surface of the boring bar 4. Thus, the boring bar 4 can be supported around its perimeter by the boring bar support screws 2, thereby strengthening the boring bar 4. It should be noted that when tightening the boring bar support screws 2, the contact force between the boring bar support plate 21 of each boring bar support screw 2 and the boring bar 4 should be as consistent as possible. This invention relates to a boring bar strengthening device that utilizes a radially adjustable boring bar support screw 2 mounted on a boring bar sleeve 1 to support and strengthen the boring bar. The boring bar sleeve 1 can achieve surface contact with the boring bar through the boring bar support screw 2 and the boring bar support plate 21. This not only provides better rigidity enhancement for the boring bar but also reduces the requirements for machining and installation accuracy of the boring bar sleeve 1. The boring bar sleeve 1 does not require internal surface machining, and the coaxiality deviation between the boring bar sleeve 1 and the boring bar 4 can be greater during installation. Therefore, this invention's boring bar strengthening device is easy to install, easy to manufacture, and has lower production costs.

[0022] The boring bar support screw 2 has a boring bar support plate 21 rotatably connected to one end near the center of the boring bar sleeve 1, so that it can rotate around the axis of the boring bar support screw 2. The boring bar support plate 21 can prevent the boring bar support screw from directly contacting the boring bar surface, and when the boring bar support screw is screwed, the boring bar support plate 21 does not rotate with the boring bar support screw, which can avoid the boring bar from being deformed and damaged due to friction.

[0023] Each of the boring bar support screws 2 in the same boring bar support unit can be arranged on the same outer circle or different outer circles of the boring bar sleeve 1. To better support the boring bar 4 and improve the strengthening effect of the boring bar strengthening device on the boring bar 4, such as... Figure 1 As shown, the boring bar support screw 2 of the same boring bar support unit is arranged on the same outer circle of the boring bar sleeve 1. The above structure can make the boring bar 4 more symmetrical and better in terms of force distribution, and the support and limiting effect of the boring bar 4 is also better, thus providing a better strengthening effect for the boring bar 4.

[0024] The specific number of boring bar support units can be set according to needs. Generally speaking, the longer the boring bar sleeve 1, the more boring bar support units are required. However, setting too many boring bar support units makes adjustment relatively troublesome. Taking all factors into consideration, the optimal configuration is as follows: Figure 1 As shown, there are two boring bar support units, which are respectively set at both ends of the boring bar sleeve 1.

[0025] The boring bar support unit can specifically consist of two or more boring bar support screws 2 arranged circumferentially around the boring bar sleeve 1. The boring bar support screws 2 are generally arranged evenly along the circumference of the boring bar sleeve 1. To better support and limit the boring bar, and to improve its rigidity, preferably, the boring bar support unit consists of six boring bar support screws 2 evenly distributed circumferentially around the boring bar sleeve 1.

[0026] In this invention, when at least two boring bar support units are installed on the wall of the boring bar sleeve 1, preferably, the boring bar support screws 2 of two adjacent boring bar support units are arranged in a one-to-one correspondence (see...). Figure 1 ).

[0027] In this invention, the boring bar sleeve 1 consists of two parts: a tube body 11 and a mounting ring 12 sleeved on one end of the tube body 11. The mounting hole 121 is provided on the mounting ring 12. In the above structure, the tube body 11 can be directly made of steel pipe, making the boring bar sleeve easier to manufacture. The mounting ring 12 can be connected to the tube body 11 by welding, pin connection, bolt connection, or other methods.

[0028] To facilitate the installation of the boring bar sleeve 1, the end face of the mounting ring 12 is provided with a protruding positioning pin 122 for inserting and engaging with the groove on the end face of the boring machine spindle.

Claims

1. A boring bar strengthening device, characterized in that: It includes a boring bar sleeve (1), one end of which is provided with a mounting hole (121) extending along the axial direction of the boring bar sleeve (1); Along the axial direction of the boring bar sleeve (1), at least one boring bar support unit is installed on the tube wall of the boring bar sleeve (1). The boring bar support unit includes at least two boring bar support screws (2) arranged circumferentially along the boring bar sleeve (1) to support and fix the boring bar inside the boring bar sleeve (1). The boring bar support screw (2) is arranged radially along the boring bar sleeve (1) and is threadedly connected to the boring bar sleeve (1) so that it can move toward or away from the center of the boring bar sleeve (1); the boring bar support screw (2) is provided with a boring bar support plate (21) at one end near the center of the boring bar sleeve (1) so that it can rotate around the axis of the boring bar support screw (2).

2. The boring bar strengthening device as described in claim 1, characterized in that: The boring bar support screw (2) of the same boring bar support unit is arranged on the same outer circle of the boring bar sleeve (1).

3. The boring bar strengthening device as described in claim 1, characterized in that: The boring bar support unit includes six boring bar support screws (2) evenly distributed around the circumference of the boring bar sleeve (1).

4. The boring bar strengthening device as described in any one of claims 1 to 3, characterized in that: At least two boring bar support units are installed on the wall of the boring bar sleeve (1), and the boring bar support screws (2) of the two adjacent boring bar support units are arranged in a one-to-one correspondence.

5. The boring bar strengthening device as described in claim 4, characterized in that: There are two boring bar support units, which are respectively set at both ends of the boring bar sleeve (1).

6. The boring bar strengthening device as described in claim 1, characterized in that: The boring bar sleeve (1) includes a tube body (11) and a mounting ring (12) sleeved on one end of the tube body (11), and the mounting hole (121) is provided on the mounting ring (12).

7. The boring bar strengthening device as described in claim 6, characterized in that: The mounting ring (12) has a protruding positioning pin (122) on its end face.

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