A boring device for deep hole machining

Abstract

This invention discloses a boring device for deep hole machining, comprising a boring bar and a boring insert, the boring insert being mounted on the boring bar. It also includes a conversion sleeve, a spring, a conversion sleeve rod, and a support rod. The conversion sleeve rod slides within the conversion sleeve, and the spring is fixedly connected to the conversion sleeve and the conversion sleeve rod. The left end of the support rod is connected to the conversion sleeve rod, and the right end abuts against the left end of the boring bar. The conversion sleeve and the boring bar are respectively mounted on the left and right turrets of a double-end CNC machine tool, allowing the right end of the support rod and the left end of the boring bar to extend into the deep hole of the workpiece, with the right end of the support rod abutting against the left end of the boring bar, compressing the spring. The movement trajectories of the left and right turrets are synchronized. The double-end CNC machine tool is started for boring machining. Cutting fluid is supplied through the coolant channel to cool the boring insert and remove chips. After machining, the deep hole is inspected for quality. This invention effectively suppresses the vibration of the boring tool mechanism during deep hole boring, thereby improving the accuracy and efficiency of deep hole machining.

Description

Technical Field

[0001] This utility model relates to the field of deep hole machining technology, and in particular to a boring device for deep hole machining. Background Technology

[0002] Deep holes are holes with an aspect ratio greater than 10. In boring operations, especially for deep holes, boring tool vibration is a major problem affecting machining quality. Boring tool vibration can lead to dimensional deviations, hole misalignment, and even tool damage. Traditional methods to avoid boring tool vibration often employ rigid supports or passive vibration damping, but these methods have limited effectiveness in deep hole machining. Therefore, there is an urgent need for a boring device and method for deep hole machining that can effectively suppress boring tool vibration. Utility Model Content

[0003] The present invention aims to provide a boring device for deep hole machining, so as to effectively suppress the vibration of the boring tool mechanism during the deep hole boring process, thereby improving the accuracy and efficiency of deep hole machining.

[0004] Therefore, the technical solution adopted by this utility model is as follows: a boring device for deep hole machining, including a boring tool mechanism, the boring tool mechanism including a boring bar and a boring insert, the boring insert being disposed on the boring bar, and also including an elastic support mechanism, the elastic support mechanism including a conversion sleeve, a spring, a conversion sleeve rod and a support rod; the conversion sleeve rod is slidably disposed inside the conversion sleeve, the left end of the spring is fixedly connected to the inner side wall of the conversion sleeve, and the right end is fixedly connected to the conversion sleeve rod, the left end of the support rod is connected to the conversion sleeve rod, and the right end abuts against the left end of the boring bar.

[0005] As a preferred embodiment of the above solution, the spring is sleeved on the conversion sleeve rod.

[0006] More preferably, a coolant channel is formed inside the boring bar along its length. The inlet end of the coolant channel is located at the right end of the boring bar, the outlet end corresponds to the boring tool, and the angle between the outlet end and the axis of the boring bar is 45 degrees. The diameter of the inlet end of the coolant channel is larger than the diameter of the outlet end.

[0007] More preferably, the left end of the conversion sleeve has a through hole, the left end of the conversion sleeve rod extends out of the through hole and is fixedly connected with a retaining ring, the outer diameter of the retaining ring being larger than the diameter of the through hole.

[0008] More preferably, the left end of the boring bar has a slot, and the right end of the support rod has a cone fixedly installed thereon, the cone being inserted into the slot.

[0009] More preferably, the right end of the conversion sleeve has a mounting hole and a threaded connection to a clamping bolt, the left end of the support rod is inserted into the mounting hole, and the bottom end of the clamping bolt abuts against the left end of the support rod.

[0010] The beneficial effects of this utility model are:

[0011] 1. By using a conversion sleeve, spring, conversion sleeve rod, and support rod, a reverse support force can be provided to the boring bar when the boring mechanism is boring deep holes. This effectively suppresses the vibration generated by the boring mechanism during the boring process, avoids dimensional deviations and hole offsets caused by the vibration of the boring mechanism, shortens the deep hole machining time, and improves the accuracy and efficiency of deep hole machining.

[0012] 2. The spring and the conversion sleeve allow the right end of the support rod to remain pressed against the left end of the boring bar during deep hole machining, ensuring that the support rod continuously provides reverse support force to the boring bar. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 yes Figure 1 A magnified view of part A in the middle. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] like Figure 1 and Figure 2 As shown, a boring device for deep hole machining includes a boring tool mechanism, which includes a boring bar 10 and a boring insert 13. The boring insert 13 is mounted on the boring bar 10. It also includes an elastic support mechanism, which includes a conversion sleeve 1, a spring 4, a conversion sleeve rod 2, and a support rod 7. The conversion sleeve rod 2 is slidably mounted inside the conversion sleeve 1. The left end of the spring 4 is fixedly connected to the inner wall of the conversion sleeve 1, and the right end is fixedly connected to the conversion sleeve rod 2. The left end of the support rod 7 is connected to the conversion sleeve rod 2, and the right end abuts against the left end of the boring bar 10. The spring 4 is sleeved on the conversion sleeve rod 2. A through hole is provided at the left end of the conversion sleeve 1, and the left end of the conversion sleeve rod 2 extends out of the through hole and is fixedly connected to a retaining ring 3. The outer diameter of the retaining ring 3 is larger than the diameter of the through hole.

[0017] The boring bar 13 is mounted on the boring bar 10 via connecting bolts 14. This is existing technology and will not be described in detail here. The outer diameter of the retaining ring 3 is larger than the diameter of the through hole, which can prevent the retaining ring 3 from passing through the through hole. This allows the retaining ring 3 to limit the rightward movement of the conversion sleeve rod 2, preventing the conversion sleeve rod 2 from moving to the right and disengaging from the conversion sleeve 1.

[0018] The boring bar 10 has a coolant channel inside along its length. The inlet end of the coolant channel is located at the right end of the boring bar 10, and the outlet end 15 corresponds to the boring tool 13 and is at an angle of 45 degrees with the axis of the boring bar 10. The diameter of the inlet end of the coolant channel is larger than the diameter of the outlet end 15.

[0019] The diameter of the inlet end of the coolant channel is larger than the diameter of the outlet end 15, which can increase the liquid pressure at the outlet end 15. In addition, the outlet end 15 corresponds to the boring tool 13, thereby achieving cooling of the boring tool 13 and removal of iron filings in the deep hole 9.

[0020] The boring bar 10 has a slot 12 at its left end, and the support rod 7 has a cone 11 fixedly installed at its right end, which is inserted into the slot 12. The conversion sleeve 2 has a mounting hole 5 at its right end, and a tightening bolt 6 is threadedly connected thereto. The left end of the support rod 7 is inserted into the mounting hole 5, and the bottom end of the tightening bolt 6 abuts against the left end of the support rod 7.

[0021] The support rod 7 is inserted into the slot 12 of the boring bar 10 via a cone 11, thereby achieving contact between the right end of the support rod 7 and the left end of the boring bar 10. The cone 11 inserting into the slot 12 prevents relative sliding between the right end of the support rod 7 and the left end of the boring bar 10 in the height direction, improving the stability of the contact state between the right end of the support rod 7 and the left end of the boring bar 10. Tightening the clamping bolt 6 counterclockwise moves the bottom end of the clamping bolt 6 away from the left end of the support rod 7, allowing the left end of the support rod 7 to slide within the mounting hole 5 to adjust the length of the support rod 7 extending beyond the mounting hole 5. Then, tightening the clamping bolt 6 clockwise causes the bottom end of the clamping bolt 6 to press against the left end of the support rod 7, thus fixing the left end of the support rod 7.

[0022] A boring method for deep hole machining includes the following steps:

[0023] S1. Install the conversion sleeve 1 and the boring bar 10 on the left and right turrets of the double-end CNC machine tool, respectively. Adjust the Z-axis distance between the left and right turrets so that the right end of the support rod 7 and the left end of the boring bar 10 extend into the deep hole 9 of the workpiece 8, the right end of the support rod 7 and the left end of the boring bar 10 abut against each other, and the spring 4 is compressed.

[0024] The conversion sleeve 1 is fixedly installed on the left end turret of the double-end CNC machine tool. The installation of the boring bar 10 on the right end turret of the double-end CNC machine tool is existing technology and will not be described in detail here.

[0025] S2. Set the movement trajectories of the left and right turrets to be synchronized to ensure that the extension and retraction of spring 4 remains unchanged during the machining process.

[0026] Before synchronizing the movement paths of the left and right turrets, parameters such as the spindle speed, tool feed rate, and depth of cut of the double-end CNC machine tool can be set according to the material, hardness, and machining requirements of workpiece 8. Synchronizing the movement paths of the left and right turrets ensures that their paths remain consistent, thus guaranteeing that the extension and retraction of spring 4 remains constant during machining.

[0027] S3. Start the double-end face CNC machine tool. The boring bar 10 performs boring machining on the deep hole 9 of the workpiece 8 through the boring bar 13. The support rod 7 provides reverse support force to the boring bar 10 so as to effectively suppress the vibration generated by the boring mechanism during the boring process.

[0028] In step S3, during the boring process of the deep hole 9, the machining status of the workpiece 8 is monitored in real time. The extension and retraction of the spring 4 is adjusted by adjusting the Z-axis distance between the left and right turrets to ensure that the extension and retraction of the spring 4 is optimized. By synchronizing the movement trajectories of the left and right turrets to ensure that the extension and retraction of the spring 4 remains constant during machining, actively adjusting the extension and retraction of the spring 4 to maintain its optimal value improves the suppression of vibration in the boring mechanism, further enhancing the boring quality and efficiency of the deep hole 9.

[0029] S4. Cutting fluid is delivered through the coolant channel inside the boring bar 10 to cool the boring insert 13 and remove the iron filings generated during the boring process in the deep hole 9.

[0030] After the boring of S5 and deep hole 9 is completed, the quality of deep hole 9 is inspected.

[0031] In step S5, the quality inspection of the deep hole 9 includes dimensional accuracy inspection and coaxiality inspection.

[0032] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A boring device for deep hole machining, comprising a boring tool mechanism, the boring tool mechanism comprising a boring bar (10) and a boring insert (13), the boring insert (13) being arranged on the boring bar (10), characterized in that: It also includes an elastic support mechanism, which includes a conversion sleeve (1), a spring (4), a conversion sleeve rod (2), and a support rod (7); The conversion sleeve rod (2) is slidably disposed inside the conversion sleeve (1). The left end of the spring (4) is fixedly connected to the inner side wall of the conversion sleeve (1), and the right end is fixedly connected to the conversion sleeve rod (2). The left end of the support rod (7) is connected to the conversion sleeve rod (2), and the right end abuts against the left end of the boring bar rod (10).

2. The boring device for deep hole machining according to claim 1, characterized in that: The spring (4) is sleeved on the conversion sleeve (2).

3. The boring device for deep hole machining according to claim 2, characterized in that: The boring bar (10) has a coolant channel inside along its length. The inlet end of the coolant channel is located at the right end of the boring bar (10), and the outlet end (15) corresponds to the boring tool (13) and is at an angle of 45 degrees with the axis of the boring bar (10). The diameter of the inlet end of the coolant channel is larger than the diameter of the outlet end (15).

4. The boring device for deep hole machining according to claim 3, characterized in that: The left end of the conversion sleeve (1) has a through hole, the left end of the conversion sleeve rod (2) extends out of the through hole and is fixedly connected with a retaining ring (3), the outer diameter of the retaining ring (3) is larger than the diameter of the through hole.

5. The boring device for deep hole machining according to claim 3, characterized in that: The boring bar (10) has a slot (12) at its left end, and the support rod (7) has a cone (11) fixedly installed at its right end. The cone (11) is inserted into the slot (12).

6. The boring device for deep hole machining according to claim 3, characterized in that: The right end of the conversion sleeve (2) is provided with an installation hole (5) and a threaded connection is provided with a clamping bolt (6). The left end of the support rod (7) is inserted into the installation hole (5), and the bottom end of the clamping bolt (6) abuts against the left end of the support rod (7).

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