A boring and milling processing device and a processing method

Abstract

The present application relates to a boring and milling processing device and a processing method. The device includes a boring bar, a boring tool, and a cutting fluid nozzle. An anti-vibration cavity is provided inside one end of the boring bar close to the boring tool. An anti-vibration cylinder is arranged in the anti-vibration cavity with a gap. Rubber sleeves are connected to both ends of the anti-vibration cylinder. One rubber sleeve is communicated with the cutting fluid nozzle, and the other rubber sleeve is communicated with an external cutting fluid source. A support rod is arranged on one side of the end of the boring bar. A rotating wheel for abutting against the wall of the boring hole of the workpiece to be processed is rotatably arranged at the end of the support rod away from the boring bar. A discharge auger arranged along the length direction of the boring bar is rotatably arranged on the support rod. A power assembly for driving the discharge auger to rotate to discharge the chips on the side of the boring bar away from the boring tool is arranged on the support rod. In the present application, the chips are discharged by the discharge auger to be away from the area where the boring tool is located, which can reduce the influence of the accumulated chips on the cutting effect of the boring tool. The anti-vibration cylinder realizes flexible connection with the boring bar through the rubber sleeve, which can suppress or eliminate the chatter phenomenon of the boring bar.

Description

Technical Field

[0001] This application relates to the technical field of boring and milling equipment, and in particular to a boring and milling processing device and a processing method. Background Art

[0002] As a downhole device for oil and gas exploration, drilling, and production, a non-magnetic drill collar transmits the huge torque for the drill bit to advance. At the same time, as a housing, it protects various downhole measurement-while-drilling feedback electronic components loaded inside. Therefore, the internal structure of the drill collar is usually designed as a stepped structure, and the aperture, dimensional accuracy, and concentricity requirements of the stepped hole are all very strict and precise to ensure the sealing performance, stability, and anti-interference performance of the measurement-while-drilling instrument in the downhole environment of high temperature, high pressure, and high corrosion. The single-section length of the drill collar can reach more than 3m. During processing, a deep-hole boring method is mainly used to axially machine an internal cavity in a metal column, and then a corresponding structure is machined on the outside of the metal column by milling. However, during the deep-hole boring process, due to the large deep hole, chips are extremely likely to accumulate inside the drill pipe, blocking the inside of the drill pipe and affecting the processing quality.

[0003] In the related technology, the Chinese patent with the application number CN202020969879.1 proposed an anti-blocking deep-hole drill boring machine cutting oil recoil circulation system, which includes a chuck, a guiding device, an oil feeder, and a drill pipe box arranged in sequence from left to right on the bed body guide rail, as well as a drill pipe and a centralizer; a first chip discharge port is opened on the side surface of the drill pipe box; a second chip discharge port is opened on the side surface of the guiding device; an oil supply system is arranged on one side of the bed body. The oil supply system includes two parallel slide rails arranged on the side surface of the bed body, and a chip collection device is arranged between the two slide rails and is slidably matched with the slide rails; the chip collection device is matched with the first chip discharge port and the second chip discharge port through the slide rails. By setting the tail of the drill pipe as the oil inlet for the cutting oil circulation and setting an oil groove with an adjustable height difference, this device facilitates the operator to quickly switch between the traditional oil inlet method and the recoil oil inlet method, solves the problem that chips are easy to block the drill pipe when using the drill pipe to discharge chips in the prior art, and has the characteristics of simple structure, preventing cutting from blocking the drill pipe, and flexible use.

[0004] The above-mentioned related technology has the following defects: Although the circulation of cutting oil can transport a part of the chips outside the workpiece to be processed, the consumption of cutting oil is too large. When too much cutting oil surges in the boring hole of the workpiece to be processed, it will also exacerbate the chatter phenomenon of the boring tool to a certain extent, making the chatter phenomenon that is extremely likely to occur when the boring tool with a long boring bar is boring more obvious, which not only affects the service life of the boring tool but also has a greater impact on the processing accuracy. Summary of the Invention

[0005] In order to improve the problem that chips are difficult to discharge and boring tool chatter easily occurs during the existing deep hole boring process, the present application provides a boring and milling processing device and a processing method.

[0006] The first aspect of the present application provides a boring and milling processing device adopting the following technical solution:

[0007] A boring and milling device comprises a bed, and a chuck, a guide device, a boring bar and a boring bar box which are sequentially arranged on the bed, a boring cutter is installed at one end of the boring bar away from the boring bar box, a cutting fluid nozzle pointing to the boring cutter is arranged at the end of the boring bar, a vibration suppression cavity is opened inside the end of the boring bar close to the boring cutter, a vibration suppression cylinder is arranged in the gap of the vibration suppression cavity, and rubber sleeves are connected to both ends of the vibration suppression cylinder, one of the rubber sleeves is connected to the cutting fluid nozzle, and the other of the rubber sleeves is connected to an external cutting fluid source;

[0008] A support rod is provided on one side of the end of the boring bar away from the boring tool, and a rotating wheel is rotatably provided on one end of the support rod away from the boring bar for abutting against the wall of the boring hole of the workpiece to be processed;

[0009] A discharging auger arranged along the length direction of the boring bar is rotatably arranged on the support rod, and a power component for driving the discharging auger to rotate so as to discharge the chips on the side of the boring bar away from the boring cutter is arranged on the support rod.

[0010] Furthermore, the central axis of the vibration suppression cavity is located on one side of the central axis of the boring bar, and a guide hole is opened on the side wall of the boring bar, and the guide hole is arranged on the side of the central axis of the boring bar away from the central axis of the vibration suppression cavity;

[0011] The support rod is slidably arranged in the guide hole, and the boring bar is provided with a control mechanism for driving the support rod to drive the rotating wheel to press against the wall of the boring hole of the workpiece to be processed.

[0012] Furthermore, the control mechanism includes an electromagnet installed in the guide hole and a permanent magnet installed on the support rod. The electromagnet and the permanent magnet are arranged opposite to each other and the arrangement direction of the two is arranged along the length direction of the support rod. The electromagnet is electrically connected to a magnetic force controller for controlling the strength of the magnetic field generated by the electromagnet after power is supplied.

[0013] Furthermore, a vibration detection sensor for detecting the vibration state of the vibration suppression cylinder is installed on the vibration suppression cylinder, and the vibration detection sensor is electrically connected to a vibration suppression controller, and the vibration suppression controller is control-connected to the magnetic force controller;

[0014] The vibration suppression controller is configured to control the magnetic force controller to increase the magnetic field strength generated after the electromagnet is energized when the vibration amount detected by the vibration detection sensor exceeds a set value; and the greater the vibration amount detected by the vibration detection sensor, the greater the amplitude of the magnetic force controller to increase the magnetic field strength generated after the electromagnet is energized.

[0015] Furthermore, a limit spring is arranged between the bottom wall of the guide hole and the support rod, and when the limit spring is compressed to a limit, the electromagnet is not in contact with the permanent magnet and the support rod.

[0016] Furthermore, the rotating wheel and the boring tool are arranged on both sides of the central axis of the boring bar and the line connecting the two is close to the central axis of the boring bar.

[0017] Furthermore, the power assembly includes a main transmission wheel coaxially fixed to the rotating wheel and an auxiliary transmission wheel coaxially fixed to the discharge auger, and the main transmission wheel is in transmission connection with the auxiliary transmission wheel;

[0018] When the rotating wheel indirectly drives the discharging auger to rotate, the discharging auger moves the chips close to the boring cutter away from the free end of the boring bar.

[0019] Furthermore, a diagonal support rod is detachably mounted on a side of the support rod away from the vibration suppression chamber, the discharge auger is rotatably mounted on the free end of the diagonal support rod, and the straight-line distance between the free end of the diagonal support rod and the central axis of the boring bar is smaller than the straight-line distance between the free end of the support rod and the central axis of the boring bar;

[0020] A brush is arranged along the contour of the outer edge of one end of the discharge auger close to the support rod. When the rotating wheel abuts against the wall of the boring hole of the workpiece to be processed, the brush flexibly abuts against the wall of the adjacent boring hole of the workpiece to be processed.

[0021] Furthermore, the chuck is used to clamp and fix the workpiece to be processed and drive the workpiece to be processed to rotate along the arrangement direction from the rotating wheel to the discharge auger and then to the boring tool, so that the chips cut by the boring tool on the wall of the bored hole of the workpiece to be processed fly out between the boring tool and the discharge auger.

[0022] A boring and milling method provided in the second aspect of the present application adopts the following technical solution:

[0023] A boring and milling method, based on the above-mentioned boring and milling device, comprises the following steps:

[0024] S1. The workpiece to be processed is placed on the chuck at one end for fixing and the other end is placed on the guide device;

[0025] S2. Control the boring bar box to extend the boring bar into the bore of the workpiece to be machined, and align the boring tool with the inner top wall of the bore wall of the workpiece to be machined;

[0026] S3. Adjust the position of the support rod on the boring bar so that the runner contacts the inner bottom wall of the bore wall of the workpiece to be machined, and continuously supply cutting fluid into the vibration damping cylinder so that the cutting fluid nozzle sprays cutting fluid towards the boring tool;

[0027] S4. Drive the workpiece to be machined to rotate by the chuck, and drive the discharge auger to rotate by the power assembly, so that the chips during the cutting of the boring tool are discharged by the discharge auger;

[0028] S5. When the boring tool drives the free end of the boring bar to vibrate during cutting, the vibration damping cylinder with cutting fluid flowing inside shakes in the vibration damping cavity by means of the rubber sleeves at both ends thereof to suppress the vibration amplitude of the boring bar.

[0029] In summary, the beneficial technical effects of the present application are as follows:

[0030] 1. Drive the workpiece to be machined to rotate about its central axis by the chuck, and the boring tool performs cutting on the bore wall of the workpiece to be machined; during this process, the runner contacts the bore wall and rotates relatively, which can indirectly drive the discharge auger to rotate on the support rod, so that the chips during the cutting of the boring tool are discharged by the discharge auger, so as to keep these chips away from the area where the boring tool is located, thereby reducing the influence of the accumulated chips on the cutting effect of the boring tool;

[0031] 2. When the boring tool causes the boring bar to vibrate during work, since high-pressure cutting fluid continuously flows in the vibration damping cylinder and its two ends are flexibly connected to the boring bar through rubber sleeves, after the vibration wave of the boring bar is transmitted to the vibration damping cylinder, the vibration damping cylinder can shake relative to the boring bar in the vibration damping cavity, which can suppress or eliminate the vibration phenomenon of the boring bar to a certain extent, thereby realizing the self-anti-vibration effect of the boring bar, effectively ensuring the machining quality of the boring and milling device of the present application, and ensuring the effective service life of the boring tool as much as possible;

[0032] 3. When the boring bar exhibits an obvious chatter phenomenon, the magnitude of the current passing through the electromagnet can also be controlled by a magnetic force controller, so that the magnetic repulsive force of the electromagnet on the permanent magnet reaches a set value. At this time, the permanent magnet drives the support rod to slide in the guide hole, so that the runner at the free end of the support rod abuts against the inner wall of the boring hole of the workpiece to be machined. And because the magnetic repulsive force between the electromagnet and the permanent magnet is a flexible acting force, when the boring bar vibrates, a part of its vibration energy will also be transmitted between the electromagnet and the permanent magnet and be weakened or even offset by the magnetic repulsive force between the two, which can also suppress the chatter of the boring bar to a certain extent. Thus, on the one hand, the chatter of the boring bar is suppressed by the jitter of the built-in vibration suppression cylinder; on the other hand, the chatter of the boring bar is continuously suppressed by the externally placed support rod and runner supported by magnetic repulsive force, and the chatter of the boring bar can be suppressed from the inside out, greatly improving the phenomenon of chatter that is prone to occur in deep hole boring machining;

[0033] 4. By means of the precise detection of the vibration state of the vibration suppression cylinder in the vibration suppression cavity by the vibration detection sensor, the interlocking effect of the magnetic repulsive force between the electromagnet and the permanent magnet can be achieved through the vibration suppression controller and the magnetic force controller, so that the suppression effect of the support rod and the runner on the chatter of the boring bar can be adjusted in real time and autonomously according to the chatter state of the boring bar itself, with a more sensitive response, and can be adjusted to the best vibration suppression combination in real time. Description of the Drawings

[0034] Figure 1 is the side view of the overall structure of the embodiment of the present application;

[0035] Figure 2 is the schematic structural diagram of the boring bar and the workpiece to be machined when used in combination;

[0036] Figure 3 is the end view of the boring bar and the workpiece to be machined when used in combination;

[0037] Figure 4 is the longitudinal sectional structural schematic diagram of the boring bar of the embodiment of the present application;

[0038] Figure 5 is the transverse sectional structural schematic diagram of the boring bar of the embodiment of the present application;

[0039] Figure 6 is the overall structural schematic diagram of the boring bar of the embodiment of the present application.

[0040] Description of the Reference Numerals:

[0041] 11. Bed; 12. Chuck; 13. Guiding device; 14. Boring bar box;

[0042] 2. Boring bar; 21. Boring tool; 22. Vibration suppression cavity; 23. Guide hole;

[0043] 31. Vibration suppression tube; 32. Rubber sleeve; 33. Vibration detection sensor;

[0044] 4. Support rod; 41. Rotating wheel; 42. Diagonal support rod;

[0045] 5. Discharging auger; 51. Brush;

[0046] 61. Electromagnet; 62. Permanent magnet; 63. Limit spring;

[0047] 71. Main transmission wheel; 72. Auxiliary transmission wheel;

[0048] 8. Workpiece to be processed. DETAILED DESCRIPTION

[0049] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0050] The present application embodiment discloses a boring and milling processing device. Figure 1 and Figure 2 It includes a bed 11 and a chuck 12, a guide device 13, a boring bar 2 and a boring bar box 14 which are sequentially arranged on the bed 11, wherein the chuck 12 is used to centrally clamp and fix the workpiece 8 to be processed and drive the workpiece 8 to be processed to rotate at a set speed, the guide device 13 is used to limit the free end of the workpiece 8 to be processed to ensure its stable rotation, and the boring bar box 14 is used to drive the boring bar 2 to feed along its length direction and adjust the position of the boring bar 2. The above are all conventional technical means and will not be repeated here.

[0051] Reference Figure 3 , Figure 4 and Figure 5 A boring tool 21 is installed at one end of the boring bar 2 away from the boring bar box 14, and a cutting fluid nozzle (not shown in the figure) pointing to the boring tool 21 is arranged at the end of the boring bar 2. A vibration suppression chamber 22 is provided inside the end of the boring bar 2 close to the boring tool 21. The vibration suppression chamber 22 is cylindrical and arranged along the length direction of the boring bar 2. A vibration suppression cylinder 31 is arranged in the gap of the vibration suppression chamber 22. Both ends of the vibration suppression cylinder 31 are connected with rubber sleeves 32. The end of the rubber sleeve 32 away from the vibration suppression cylinder 31 is fixed to the cavity wall at the two opposite ends of the vibration suppression chamber 22. One of the rubber sleeves 32 is connected to the cutting fluid nozzle, and the other rubber sleeve 32 is connected to the external cutting fluid source. In addition, in order to ensure that the high-pressure cutting fluid flowing in the vibration suppression cylinder 31 does not damage the rubber sleeve 32, the rubber sleeve 32 should have an inner braided layer or an outer protective shell to prevent the rubber sleeve 32 from bursting when the internal pressure in the rubber sleeve 32 is too large.

[0052] On one side of the end of the boring bar 2 away from the boring tool 21, a support rod 4 is provided. At one end of the support rod 4 away from the boring bar 2, a runner 41 is rotatably provided for abutting against the wall of the boring hole of the workpiece 8 to be machined. The runner body of the runner 41 is made of metal or wear-resistant rubber, and the rotation axis of the runner 41 is parallel to the central axis of the boring bar 2.

[0053] On the support rod 4, a discharge auger 5 is rotatably provided along the length direction of the boring bar 2. On the support rod 4, a power assembly is provided for driving the discharge auger 5 to rotate to discharge the chips on the side of the boring bar 2 away from the boring tool 21; and to ensure the stability of the discharge auger 5 during rotation and discharging, the axial length of the discharge auger 5 does not exceed 20 cm, and only the chips near the boring tool 21 need to be discharged as much as possible. Moreover, when the boring bar 2 eccentrically extends into the boring hole of the workpiece 8 to be machined, the discharge auger 5 should be located in the area of the maximum gap between the boring bar 2 and the wall of the boring hole of the workpiece 8 to be machined. And optimally, this area should be located in the lower half of the cross-section of the boring hole of the workpiece 8 to be machined, so that the chips sliding to the inner bottom wall of the wall of the boring hole of the workpiece 8 to be machined can be stably discharged by the discharge auger 5.

[0054] Therefore, when using the present application for deep-hole boring machining, first, the workpiece 8 to be machined is passed through the guiding device 13 and fixed on the chuck 12. The guiding device 13 is adjusted so that the workpiece 8 to be machined is coaxial with the rotating part of the chuck 12. Then, the boring bar box 14 is moved so that the end of the boring bar 2 with the boring tool 21 installed extends into the boring hole of the workpiece 8 to be machined, and the boring tool 21 on the boring bar 2 contacts the inner top of the wall of the boring hole of the workpiece 8 to be machined. At this time, the discharge auger 5 on the boring bar 2 is located in the lower part of the boring hole of the workpiece 8 to be machined. After continuously and stably inputting cutting fluid into the vibration damping cylinder 31, the cutting fluid is sprayed from the cutting fluid nozzle onto the boring tool 21. Subsequently, the chuck 12 is used to drive the workpiece 8 to be machined to rotate around its central axis, and the boring tool 21 then performs cutting on the wall of the boring hole of the workpiece 8 to be machined.

[0055] During this process, the discharge auger 5 is driven to rotate by the above-mentioned power assembly, so that the chips generated during the cutting of the boring tool 21 are discharged by the discharge auger 5, so that these cuttings are far away from the area where the boring tool 21 is located, thereby reducing the influence of the accumulated chips on the cutting effect of the boring tool 21. At the same time, when the boring tool 21 causes the boring bar 2 to vibrate during work, since high-pressure cutting fluid continuously flows through the vibration damping cylinder 31 and its two ends are flexibly connected to the boring bar 2 through rubber sleeves 32, when the vibration wave of the vibration of the boring bar 2 is transmitted to the vibration damping cylinder 31, the vibration damping cylinder 31 can shake relative to the boring bar 2 in the vibration damping cavity 22, which can suppress or eliminate the vibration of the boring bar 2 to a certain extent, thereby realizing the self-anti-vibration effect of the boring bar 2, effectively ensuring the machining quality of the boring and milling machining device of the present application, and ensuring the effective service life of the boring tool 21 as much as possible.

[0056] In order to further suppress the chatter of the boring bar 2, refer to Figure 3 , Figure 4 and Figure 5 The central axis of the vibration suppression cavity 22 is located on one side of the central axis of the boring bar 2, and a guide hole 23 is opened on the side wall of the boring bar 2. The guide hole 23 is arranged on the side of the central axis of the boring bar 2 away from the central axis of the vibration suppression cavity 22;

[0057] The support rod 4 is slidably disposed in the guide hole 23 , and the boring bar 2 is provided with a control mechanism for driving the support rod 4 to drive the rotating wheel 41 to press against the wall of the boring hole of the workpiece 8 to be processed.

[0058] Among them, the control mechanism includes an electromagnet 61 installed in the guide hole 23 and a permanent magnet 62 installed on the support rod 4. The electromagnet 61 and the permanent magnet 62 are arranged opposite to each other and the arrangement direction of the two is arranged along the length direction of the support rod 4. The electromagnet 61 is electrically connected to a magnetic force controller for controlling the strength of the magnetic field generated by the electromagnet 61 after power is supplied. After power is supplied to the electromagnet 61, the electromagnet 61 repel each other magnetically with the permanent magnet 62.

[0059] Therefore, when the boring bar 2 vibrates more obviously, the magnitude of the current passing through the electromagnet 61 is controlled by the magnetic controller so that the magnetic repulsion force of the electromagnet 61 on the permanent magnet 62 reaches a set value. At this time, the permanent magnet 62 drives the support rod 4 to slide in the guide hole 23 so that the rotating wheel 41 at the free end of the support rod 4 is pressed against the wall of the boring hole of the workpiece 8 to be processed. Since the magnetic repulsion force between the electromagnet 61 and the permanent magnet 62 is a flexible force, when the boring bar 2 vibrates, part of its vibration energy will also be transmitted to between the electromagnet 61 and the permanent magnet 62 and weakened or even offset by the magnetic repulsion force between the two, which can also suppress the vibration of the boring bar 2 to a certain extent.

[0060] Thus, on the one hand, the vibration of the boring bar 2 is suppressed by the shaking of the built-in vibration suppression cylinder 31; on the other hand, the vibration of the boring bar 2 is controlled by the external support rod 4 and the rotating wheel 41 supported by the magnetic repulsion force. The vibration of the boring bar 2 can be suppressed from the inside out, which greatly improves the phenomenon of vibration that is very easy to occur in deep hole boring processing.

[0061] However, considering that the vibration frequency of the boring bar 2 is not constant but changes dynamically in real time, it is difficult for external control to achieve good control accuracy. Figure 4 and Figure 5 A vibration detection sensor 33 for detecting the vibration state of the vibration suppression cylinder 31 is installed. The vibration detection sensor 33 can be an accelerometer, a piezoelectric sensor or a magnetoelectric sensor, which can accurately detect the vibration acceleration and vibration velocity, or it can be a displacement sensor, a gyroscope, etc., which can accurately detect the vibration amplitude and vibration frequency. In the specific configuration, the above sensors can be set separately or in combination.

[0062] The vibration detection sensor 33 is electrically connected to a vibration suppression controller, and the vibration suppression controller is in control connection with the magnetic force controller; the vibration suppression controller is configured to, when the vibration amount detected by the vibration detection sensor 33 exceeds a set value, control the magnetic force controller to increase the magnetic field intensity generated after the electromagnet 61 is energized; and the greater the vibration amount (such as amplitude or vibration speed) detected by the vibration detection sensor 33, the greater the amplitude of controlling the magnetic force controller to increase the magnetic field intensity generated after the electromagnet 61 is energized.

[0063] Thus, by means of the precise detection of the vibration state of the vibration suppression cylinder 31 in the vibration suppression cavity 22 by the vibration detection sensor 33, the joint control effect of the magnetic repulsion force between the electromagnet 61 and the permanent magnet 62 can be achieved through the vibration suppression controller and the magnetic force controller, so that the suppression effect of the support rod 4 and the runner 41 on the chatter of the boring bar 2 can be adjusted autonomously in real time according to the chatter state of the boring bar 2 itself, the response is more sensitive, and the optimal vibration suppression combination can be adjusted in real time.

[0064] In addition, referring to Figure 5 , a limiting spring 63 is provided between the bottom wall of the guiding hole 23 and the support rod 4. When the limiting spring 63 is compressed to the limit, the electromagnet 61 is not in contact with the permanent magnet 62 and the support rod 4, so as to prevent direct collision between the electromagnet 61 and the permanent magnet 62 and cause damage; an anti - detachment key is fixedly connected to the side wall of the support rod 4, and an anti - detachment groove that is slidably adapted to the anti - detachment key is provided on the wall of the guiding hole 23. Moreover, the runner 41 and the boring tool 21 are arranged on both sides of the central axis of the boring bar 2, and the connection line between the two is close to the central axis of the boring bar 2. In this way, the vibration suppression direction of the magnetic repulsion force of the support rod 4 and the runner 41 can be made as close as possible to the main vibration direction when the boring bar 2 generates chatter, ensuring the vibration suppression effect.

[0065] In order to minimize the occupied space of the relevant components on the boring bar 2 in the boring hole of the workpiece 8 to be machined, referring to Figure 3 and Figure 6 , the above - mentioned power assembly includes a main driving wheel 71 coaxially and fixedly connected to the runner 41 and a secondary driving wheel 72 coaxially and fixedly connected to the discharge auger 5. The main driving wheel 71 is in transmission connection with the secondary driving wheel 72. Specifically, the transmission connection is carried out through a chain, a belt or a timing belt. In this embodiment, both the main driving wheel 71 and the secondary driving wheel 72 are timing wheels, and they are in transmission connection through a timing belt to prevent slipping after being infiltrated by cutting fluid; and a protective cover (not shown in the figure) is provided outside the main driving wheel 71 and the secondary driving wheel 72 to prevent chips from affecting their normal transmission.

[0066] Moreover, when the runner 41 indirectly drives the discharge auger 5 to rotate, the discharge auger 5 moves the chips near the boring tool 21 away from the free end of the boring bar 2.

[0067] In this way, after the runner 41 abuts against the wall of the boring hole of the workpiece 8 to be machined, as the workpiece 8 to be machined rotates, the runner 41 will also rotate accordingly and drive the discharge auger 5 to rotate and discharge the chips through the transmission of the main drive wheel 71 and the auxiliary drive wheel 72, without the need to additionally set a power source, occupying less space.

[0068] In addition, referring to Figure 3 and Figure 6 , a stay bar 42 is detachably installed on the side of the support bar 4 away from the vibration damping cavity 22, and the discharge auger 5 is rotatably installed on the free end of the stay bar 42. The linear distance from the free end of the stay bar 42 to the central axis of the boring bar 2 is less than the linear distance from the free end of the support bar 4 to the central axis of the boring bar 2, so as to ensure that the discharge auger 5 will not contact the wall of the boring hole of the workpiece 8 to be machined prior to the runner 41, and avoid the discharge failure of the discharge auger 5.

[0069] Moreover, referring to Figure 3 and Figure 6 , a brush 51 is arranged along the outer edge of one end of the discharge auger 5 close to the support bar 4 along its contour. When the runner 41 abuts against the wall of the boring hole of the workpiece 8 to be machined, the brush 51 is in flexible contact with the adjacent wall of the boring hole of the workpiece 8 to be machined, which can improve the discharge efficiency as much as possible on the basis of not interfering with the stable rotation of the discharge auger 5.

[0070] In addition, it should be further clarified that the chuck 12 is used to clamp and fix the workpiece 8 to be machined and drive the workpiece 8 to be machined to rotate along the arrangement direction from the runner 41 to the discharge auger 5 and then to the boring tool 21, so that the chips on the wall of the boring hole of the workpiece 8 to be machined by the boring tool 21 fly out between the boring tool 21 and the discharge auger 5.

[0071] In this way, when the workpiece 8 to be machined rotates, the chips cut by the boring tool 21 splash into the area between the boring tool 21 and the discharge auger 5 under the action of inertia. Most of the chips can be conveyed outward by the rotating discharge auger 5 and move away from the machining trajectory of the boring tool 21 on the workpiece 8 to be machined. A small part of the chips fall and remain on the wall of the boring hole of the workpiece 8 to be machined with the rotation of the workpiece 8 to be machined, but under the action of the brush 51 on the discharge auger 5, they will also be conveyed outward.

[0072] Moreover, since the discharge auger 5 is arranged between the boring tool 21 and the runner 41, the bristles on the discharge auger 5 can pre-clean the wall of the boring hole that the runner 41 is about to contact, which can significantly reduce the slipping phenomenon between the runner 41 and the wall of the boring hole of the workpiece 8 to be machined, thus effectively ensuring the long-term and stable discharge effect of the discharge auger 5.

[0073] The embodiment of the present application discloses a boring and milling processing method, based on the above-mentioned boring and milling processing device, referring to Figure 1 , Figure 2 and Figure 3, which comprises the following steps:

[0074] S1. Fix one end of the workpiece 8 to be machined on the chuck 12 and place the other end on the guiding device 13;

[0075] S2. Control the boring bar box 14 to make the boring bar 2 extend into the boring hole of the workpiece 8 to be machined, and align the boring tool 21 with the inner top wall of the hole wall of the boring hole of the workpiece 8 to be machined;

[0076] S3. Adjust the position of the supporting rod 4 on the boring bar 2 to make the runner 41 contact with the inner bottom wall of the hole wall of the boring hole of the workpiece 8 to be machined, and continuously supply cutting fluid into the vibration damping cylinder 31 to make the cutting fluid nozzle spray cutting fluid towards the boring tool 21;

[0077] S4. Drive the workpiece 8 to be machined to rotate through the chuck 12, and drive the discharge auger 5 to rotate through the power assembly, so that the chips generated during the cutting of the boring tool 21 are discharged by the discharge auger 5;

[0078] S5. When the boring tool 21 drives the free end of the boring bar 2 to vibrate during cutting, the vibration damping cylinder 31 with cutting fluid flowing inside shakes in the vibration damping cavity 22 by means of the rubber sleeves 32 at both ends thereof to suppress the vibration amplitude of the boring bar 2.

[0079] The implementation principle of a boring and milling processing device according to an embodiment of the present application is as follows:

[0080] Drive the workpiece 8 to be machined to rotate around its central axis through the chuck 12, and the boring tool 21 performs cutting processing on the hole wall of the boring hole of the workpiece 8 to be machined; during this process, the runner 41 contacts the hole wall of the boring hole and rotates relatively, which can indirectly drive the discharge auger 5 to rotate on the supporting rod 4, so that the chips generated during the cutting of the boring tool 21 are discharged by the discharge auger 5, so as to make these chips away from the area where the boring tool 21 is located, thereby reducing the influence of the accumulated chips on the cutting effect of the boring tool 21.

[0081] When the boring tool 21 causes the boring bar 2 to vibrate during work, since high-pressure cutting fluid continuously flows through the vibration damping cylinder 31 and its two ends are flexibly connected to the boring bar 2 through the rubber sleeves 32, after the vibration wave of the boring bar 2 is transmitted to the vibration damping cylinder 31, the vibration damping cylinder 31 can shake relative to the boring bar 2 in the vibration damping cavity 22, which can suppress or eliminate the vibration phenomenon of the boring bar 2 to a certain extent, thereby realizing the self anti-vibration effect of the boring bar 2, effectively ensuring the processing quality of the boring and milling processing device of the present application, and ensuring the effective service life of the boring tool 21 as much as possible.

[0082] Moreover, when obvious chatter occurs to the boring bar 2, the magnitude of the current passing through the electromagnet 61 can be controlled by the magnetic force controller, so that the magnetic repulsive force of the electromagnet 61 on the permanent magnet 62 reaches a set value. At this time, the permanent magnet 62 drives the support rod 4 to slide in the guide hole 23, so that the runner 41 at the free end of the support rod 4 abuts against the hole wall of the borehole of the workpiece 8 to be machined. Since the magnetic repulsive force between the electromagnet 61 and the permanent magnet 62 is a flexible acting force, when the boring bar 2 chatters, part of its vibration energy will also be transmitted between the electromagnet 61 and the permanent magnet 62 and weakened or even offset by the magnetic repulsive force therebetween, which can also suppress the chatter of the boring bar 2 to a certain extent.

[0083] Thus, on the one hand, the chatter of the boring bar 2 is suppressed by the jitter of the built-in vibration suppression cylinder 31; on the other hand, the chatter of the boring bar 2 is suppressed by the externally arranged support rod 4 and runner 41 supported by magnetic repulsive force, so that the chatter of the boring bar 2 can be suppressed from the inside out, greatly improving the phenomenon of chatter that is likely to occur in deep hole boring machining.

[0084] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the field to which this application belongs. The terms "first", "second", "third" and similar terms used in the specification and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "a" or "an" do not denote a quantity limitation, but mean that there is at least one. The terms such as "comprising" or "including" mean that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms such as "upper", "lower", "left" and "right" are only used to represent relative position relationships, and when the absolute position of the object to be described changes, the relative position relationships may also change accordingly.

[0085] The above are all the preferred embodiments of this application. Without restricting the protection scope of this application accordingly, therefore: All equivalent changes made according to the structure, shape and principle of this application shall be covered within the protection scope of this application.

Claims

1. A boring and milling processing device, comprising a bed body (11), a chuck (12), a guiding device (13), a boring bar (2) and a boring bar box (14) which are successively arranged on the bed body (11). A boring tool (21) is installed at one end of the boring bar (2) far away from the boring bar box (14). It is characterized in that, A cutting fluid nozzle pointing to the boring tool (21) is provided at the end of the boring bar (2). An anti-vibration cavity (22) is formed inside one end of the boring bar (2) close to the boring tool (21). An anti-vibration cylinder (31) is arranged in the anti-vibration cavity (22) with a gap. Rubber sleeves (32) are connected to both ends of the anti-vibration cylinder (31). One of the rubber sleeves (32) is communicated with the cutting fluid nozzle, and the other rubber sleeve (32) is communicated with an external cutting fluid source; A support rod (4) is provided on one side of the end of the boring bar (2) away from the boring tool (21). A runner (41) for abutting against the wall of the boring hole of the workpiece (8) to be machined is rotatably arranged at one end of the support rod (4) away from the boring bar (2); A discharge auger (5) arranged along the length direction of the boring bar (2) is rotatably arranged on the support rod (4). A power assembly for driving the discharge auger (5) to rotate to discharge the chips on the side of the boring bar (2) away from the boring tool (21) is arranged on the support rod (4); The central axis of the anti-vibration cavity (22) is located on one side of the central axis of the boring bar (2). A guiding hole (23) is formed in the side wall of the boring bar (2), and the guiding hole (23) is arranged on the side of the central axis of the boring bar (2) away from the central axis of the anti-vibration cavity (22); The support rod (4) is slidably arranged in the guiding hole (23). A control mechanism for driving the support rod (4) to drive the runner (41) to abut against the wall of the boring hole of the workpiece (8) to be machined is arranged in the boring bar (2); The control mechanism includes an electromagnet (61) installed in the guiding hole (23) and a permanent magnet (62) installed on the support rod (4). The electromagnet (61) and the permanent magnet (62) are arranged oppositely, and their arrangement directions are along the length direction of the support rod (4). The electromagnet (61) is electrically connected to a magnetic force controller for controlling the intensity of the magnetic field generated after the electromagnet (61) is energized; A vibration detection sensor (33) for detecting the vibration state of the anti-vibration cylinder (31) is installed on the anti-vibration cylinder (31). The vibration detection sensor (33) is electrically connected to an anti-vibration controller, and the anti-vibration controller is connected to the magnetic force controller for control; The anti-vibration controller is configured to control the magnetic force controller to increase the magnetic field intensity generated after the electromagnet (61) is energized when the vibration amount detected by the vibration detection sensor (33) exceeds a set value; and the greater the vibration amount detected by the vibration detection sensor (33), the greater the amplitude of the magnetic field intensity generated after the electromagnet (61) is energized controlled by the magnetic force controller.

2. The boring and milling processing device according to claim 1, characterized in that A limiting spring (63) is arranged between the bottom wall of the guiding hole (23) and the support rod (4). When the limiting spring (63) is compressed to the limit, the electromagnet (61), the permanent magnet (62) and the support rod (4) are not in contact with each other.

3. A boring and milling processing device according to any one of claims 1-2, characterized in that, The runner (41) and the boring tool (21) are arranged on both sides of the central axis of the boring bar (2), and their connecting line is close to the central axis of the boring bar (2).

4. The boring and milling processing device according to claim 3, characterized in that The power assembly includes a main driving wheel (71) coaxially and fixedly connected to the runner (41) and a secondary driving wheel (72) coaxially and fixedly connected to the discharge auger (5). The main driving wheel (71) is drivingly connected to the secondary driving wheel (72); When the runner (41) indirectly drives the discharge auger (5) to rotate, the discharge auger (5) moves the chips near the boring cutter (21) away from the free end of the boring bar (2) in a direction away from the free end of the boring bar (2).

5. A boring and milling processing device according to claim 4, characterized in that, A stay bar (42) is detachably installed on a side of the support bar (4) facing away from the vibration damping cavity (22). The discharge auger (5) is rotatably installed at the free end of the stay bar (42). The linear distance from the free end of the stay bar (42) to the central axis of the boring bar (2) is less than the linear distance from the free end of the support bar (4) to the central axis of the boring bar (2); A brush (51) is arranged along the outer edge of one end of the discharge auger (5) close to the support bar (4). When the runner (41) abuts against the inner wall of the boring hole of the workpiece to be machined (8), the brush (51) abuts against the inner wall of the boring hole of the adjacent workpiece to be machined (8) in a flexible manner.

6. The boring and milling processing device according to claim 5, wherein The chuck (12) is used for clamping and fixing the workpiece to be machined (8) and driving the workpiece to be machined (8) to rotate along the arrangement direction from the runner (41) to the discharge auger (5) and then to the boring cutter (21), so that the chips on the inner wall of the boring hole of the workpiece to be machined (8) by the boring cutter (21) fly out between the boring cutter (21) and the discharge auger (5).

7. A boring and milling method, based on a boring and milling device according to any one of claims 1-6, characterized in that, It includes the following steps: S1. Place one end of the workpiece to be machined (8) on the chuck (12) for fixation and the other end on the guiding device (13); S2. Control the boring bar box (14) to make the boring bar (2) extend into the boring hole of the workpiece to be machined (8), and align the boring cutter (21) with the inner top wall of the boring hole of the workpiece to be machined (8); S3. Adjust the position of the support bar (4) on the boring bar (2) so that the runner (41) contacts the inner bottom wall of the boring hole of the workpiece to be machined (8). Continuously supply cutting fluid into the vibration damping cylinder (31) so that the cutting fluid nozzle sprays cutting fluid towards the boring cutter (21); S4. Drive the workpiece to be machined (8) to rotate through the chuck (12), and drive the discharge auger (5) to rotate through the power assembly, so that the chips during the cutting of the boring cutter (21) are discharged by the discharge auger (5); S5. When the boring cutter (21) drives the free end of the boring bar (2) to vibrate during cutting, the vibration damping cylinder (31) with cutting fluid flowing inside shakes in the vibration damping cavity (22) by means of the rubber sleeves (32) at both ends thereof to suppress the vibration amplitude of the boring bar (2).

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