Boring Bars

Abstract

The patent of the present invention discloses a boring bar, which includes a brake module, a boring bar body, a slope push rod and a modular sliding tool seat. The boring bar body is provided with a cavity, in which a slope push rod is provided, one end of the slope push rod is connected to the brake module through a driving nut, and the cavity is used for the slope push rod to reciprocate. A modular sliding tool seat is provided between the two ends of the boring bar body, and the slope push rod passes through the hole of the modular sliding tool seat. The hole of the modular sliding tool seat can provide the reciprocating movement of the slope part of the slope push rod. A precision adjustment mechanism is provided at one end of the modular sliding tool seat, and a cutting tool clamp is embedded in the other end of the modular sliding tool seat. The precision adjustment mechanism is threadedly connected to the boring bar body, and one end of the precision adjustment mechanism abuts against the slope part of the slope push rod. The precision adjustment mechanism is used to adjust the slope part of the slope push rod to adjust the cutting depth of the cutting tool. This boring bar solves the problem of automatic feeding, saves manual control time, and improves the accuracy of feeding.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to a boring bar. Background Art

[0002] In current mechanical processing, ordinary boring machines are one of the indispensable equipment in mechanical processing. Compared with CNC boring machines, ordinary boring machines cannot be replaced under certain specific working conditions. Boring is a common operation in mechanical processing, mainly used to process holes on workpieces. Boring machines are the main equipment for boring processing. They use boring bars to cut materials on the workpiece to obtain the required hole diameter, shape and accuracy. However, ordinary boring machines have an inherent problem of being unable to automatically feed in the hole diameter processing direction, and still use the old-fashioned feeding method. The boring bars on the market currently still require manual tapping of the sliding tool holder to adjust the diameter size during the working period of the boring bar, and cannot guarantee the processing accuracy with high efficiency, high precision and high stability. Summary of the invention

[0003] The invention discloses a boring bar, which can solve one of the technical problems of machining on the above-mentioned common boring machine.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a boring bar, characterized in that it comprises a braking module, a boring bar body, a slope push rod and a modular sliding tool seat, one end of the boring bar body is connected to the main shaft of the boring machine, and the other end is threadedly connected to the external thread of the braking module, the boring bar body is provided with a cavity, a slope push rod is arranged in the cavity, one end of the slope push rod is connected to the braking module through a driving nut, the cavity is used for the slope push rod to reciprocate, a modular sliding tool seat is provided between the two ends of the boring bar body, the slope push rod passes through the hole of the modular sliding tool seat, the hole of the modular sliding tool seat can be used for the reciprocating movement of the slope part of the slope push rod, a precision adjustment mechanism is provided at one end of the modular sliding tool seat, and a cutting tool clamp is embedded in the other end of the modular sliding tool seat, the precision adjustment mechanism is threadedly connected to the boring bar body, one end of the precision adjustment mechanism abuts against the slope part of the slope push rod, and the precision adjustment mechanism is used to adjust the slope part of the slope push rod to adjust the cutting tool feed depth The precision adjustment mechanism (404) comprises an adjustment unit, the adjustment unit comprises an adjustment nut and an adjustment screw, the adjustment nut is rotatably arranged on the boring bar body (3), the adjustment nut and the adjustment screw are threadedly connected, one end of the adjustment screw abuts against the slope portion of the slope push rod (2); wherein the brake module (1) comprises a boring bar brake block (101), a stop link (105) and an in-place sliding structure (102), the in-place sliding structure (102) The invention comprises a group of marbles (108), a spring (109) and a stop block (103); the spring (109) is installed in the boring bar brake block (101); one end of the spring (109) close to the stop block (103) is in contact with the marble (108); the marble (108) abuts against the stop block (103); the stop block (103) is sleeved on the stop connecting rod (105); and the stop connecting rod (105) is fixedly connected to the driving nut (104).

[0005] Preferably, the modular sliding knife seat is provided with a return top structure, and a connecting piece is provided on the return top structure, one end of the connecting piece is connected to the precision adjustment mechanism, and the other end is connected to the return top structure.

[0006] Preferably, the in-place sliding structure comprises a first bearing and a second bearing, the first bearing being arranged on a side of the marble away from the spring, and the second bearing being arranged on a side of the spring away from the marble.

[0007] Preferably, the modular sliding tool holder comprises a cutting tool holder and one or more replaceable cutting blades, wherein one end of the cutting tool holder abuts against the tool holder body and the other end is connected to the detachable cutting blade.

[0008] Preferably, the cutting tool holder is provided with a plurality of screw holes, and the cutting tool holder is detachably connected to the tool holder body of the modular sliding tool holder by means of bolts cooperating with the screw holes.

[0009] Preferably, a connecting spindle portion is provided at one end of the boring bar body, and the connecting spindle portion is connected to the boring machine spindle; and a connecting portion threadedly connected to the boring bar brake block is provided at the other end of the boring bar body.

[0010] Preferably, the drive nut and the slope push rod are detachably connected.

[0011] Preferably, a cavity is provided inside the boring bar body, and the maximum movable space of the in-place sliding structure is consistent with the movable space of the inclined push rod.

[0012] A boring bar provided by the present invention has the following beneficial effects: the present application sets a modular sliding tool holder on a boring bar, and the precision adjustment mechanism on the modular sliding tool holder of the patent of the present invention is used to adjust the slope part of the slope push rod to adjust the cutting depth of the cutting tool. This boring bar solves the problem of automatic feeding, saves manual control time, and improves the accuracy of feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0014] Figure 1 Schematic diagram of the structure of a boring bar in an embodiment of the present invention;

[0015] Figure 2 Schematic diagram of the external structure of the boring bar in an embodiment of the present invention;

[0016] Figure 3 Schematic diagram of the external structure of the boring bar in an embodiment of the present invention;

[0017] Figure 4 Schematic diagram of the boring bar structure in an embodiment of the present invention;

[0018] Figure 5 is a partially enlarged schematic diagram of a boring bar in an embodiment of the present invention;

[0019] Figure 6 Schematic diagram of the structure of the brake module in the embodiment of the present invention;

[0020] Figure 7 It is a three-dimensional exploded structural schematic diagram of a brake module in an embodiment of the present invention;

[0021] Figure 8 for Figure 1 An enlarged schematic diagram of the precision adjustment mechanism in the illustrated embodiment;

[0022] Description of main component symbols:

[0023] 1. Braking module; 2. Slope ejector rod; 3. Boring bar body; 4. Modular sliding tool holder; 101. Boring bar brake block; 102. In-place sliding structure; 103. Stop block; 104. Driving nut; 105. Stop connecting rod; 106. First bearing; 107. Second bearing; 108. Marble; 109. Spring; 301. Connecting spindle; 401. Returning ejector rod; 402. Cutting tool holder; 403. Tool holder body; 404. Precision adjustment mechanism; 405. Connecting piece;

[0024] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the embodiments. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein. DETAILED DESCRIPTION

[0025] In order to better understand the above technical solution, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0026] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0027] Boring is a common operation in mechanical processing, mainly used to process holes on workpieces. Boring machines are the main equipment for boring processing. They use boring bars to remove materials from workpieces to obtain the required hole diameter, shape and accuracy. However, ordinary boring machines cannot accurately control the feed accuracy in the processing direction. When the feed depth needs to be adjusted, it is necessary to manually tap the sliding tool holder to adjust the diameter size while the boring bar is working, which cannot complete the processing efficiently, accurately and stably.

[0028] To solve the above problem, in one embodiment, Figure 1As shown, a boring bar is provided, comprising a brake module 1, a boring bar body 3, a slope push rod 2 and a modular sliding tool holder 4. One end of the boring bar body 3 is connected to the boring machine spindle, and the other end is threadedly connected to the external thread of the brake module 1. The boring bar body 3 is provided with a cavity, and the slope push rod 2 is arranged in the cavity. One end of the slope push rod 2 is connected to the brake module 1 through a driving nut 104. The cavity is used for the slope push rod 2 to reciprocate. A modular sliding tool holder 4 is provided between the two ends of the boring bar body 3. The slope push rod 2 is threadedly connected to the external thread of the brake module 1. The holes of the modular sliding tool seat 4 allow the reciprocating motion of the sloped portion of the slope push rod 2. A precision adjustment mechanism 404 is provided at one end of the modular sliding tool seat 4. A cutting tool clamp 402 is embedded in the other end of the modular sliding tool seat 4. The precision adjustment mechanism 404 is threadedly connected to the boring bar body 3. One end of the precision adjustment mechanism 404 abuts against the sloped portion of the slope push rod 2. The precision adjustment mechanism 404 is used to adjust the sloped portion of the slope push rod 2 to adjust the cutting tool feed depth.

[0029] Specifically, one end of the boring bar body 3 is designed with a connection structure adapted to the boring machine spindle, such as an internal thread or a flange, so as to be tightly connected to the boring machine spindle. The other end of the boring bar body 3 is connected to the brake module 1 by a threaded manner, and the threaded connection manner can be an internal thread or a flange. A cavity is provided inside the boring bar body 3, and a slope push rod 2 is provided in the cavity. The brake module 1 can control the slope push rod 2 to reciprocate in the cavity of the boring bar body 3. One end of the slope push rod 2 is connected to the brake module 1 by a bolt through a driving nut 104. The driving nut 104 can be left-handed or right-handed to control the movement trajectory of the slope push rod 2. A modular sliding tool holder 4 is provided between the two ends of 3, and the modular sliding tool holder 4 is embedded in the boring bar body 3. A hole is provided in the modular sliding tool holder 4, and the size and shape of the hole match the slope portion of the slope push rod 2, so that the slope portion of the slope push rod 2 can pass smoothly and reciprocate. A precision adjustment mechanism 404 is provided at one end of the modular sliding tool holder 4, and the mechanism can be a spiral type or a gear type to achieve fine adjustment. The precision adjustment mechanism 404 is connected to the boring bar body 3 through a thread to ensure stability and reliability during the adjustment process. One end of the precision adjustment mechanism 404 abuts against the slope portion of the slope push rod 2 (specifically, as Figure 1 and Figure 4As shown, the slope push rod 2 includes two parts: a sloped part and a non-sloped part. By rotating the adjustment mechanism, the position of the sloped part of the slope push rod 2 can be changed, thereby adjusting the feed depth of the cutting tool. The other end of the modular sliding tool seat 4 is embedded in the cutting tool clamp 402. The cutting tool clamp 402 can be a quick-change design to quickly replace different types of cutting tools. The cutting tool clamp 402 firmly clamps the cutting tool through a clamping mechanism (such as a spring clamp, a hydraulic clamp or a pneumatic clamp) to ensure the stability of the tool during the processing. Before the start of processing, the position of the modular sliding tool seat 4 is adjusted according to the processing requirements, and the feed depth of the cutting tool is set through the precision adjustment mechanism 404. The boring machine spindle is started, and the slope push rod 2 reciprocates under the action of the drive nut 104 to push the cutting tool to perform boring operations. By adjusting the reciprocating speed of the slope push rod 2 and the feed speed of the cutting tool, boring processing of different diameters and depths can be achieved.

[0030] In one embodiment, based on the above embodiment, refer to Figure 1 and Figure 8 As shown, Figure 8 for Figure 1 The enlarged schematic diagram of the precision adjustment mechanism 404 in the embodiment shown is Figure 8 The precision adjustment mechanism 404 includes an adjustment unit, which includes an adjustment nut and an adjustment screw. The adjustment nut is rotatably arranged on the boring bar body 3, the adjustment nut and the adjustment screw are threadedly connected, and one end of the adjustment screw abuts against the slope portion of the slope push rod 2.

[0031] Specifically, the precision adjustment mechanism 404 includes an adjustment unit, which includes an adjustment nut and an adjustment screw. The adjustment nut is designed to be rotatably arranged on the boring bar body 3, and it is usually fixed to the outside or inside of the boring bar body 3 by a thread. The adjustment screw is a threaded rod, one end of which abuts against the slope portion of the slope push rod 2. The adjustment screw is fixedly connected to the modular sliding tool holder 4, and the adjustment screw is threadedly connected to the adjustment nut. The adjustment nut and the adjustment screw are connected by internal and external threads. The axial movement of the adjustment screw is controlled by rotating the adjustment nut. When the adjusting nut is rotated, the adjusting screw will move along the axial direction of the boring bar body 3 due to the spiral nature of the thread. The adjusting screw The movement of the rod is controlled by precise thread pitch, thereby achieving precise adjustment of the slope portion of the slope push rod 2. One end of the adjusting screw abuts against the slope portion of the slope push rod 2. When the adjusting screw moves, it pushes the slope push rod 2 to adjust its position or angle. The precision adjustment mechanism 404 can fine-tune the position of the slope push rod 2 to adapt to different processing depths or angle requirements. In order to fix the position of the adjusting screw, the adjusting nut may include a locking mechanism, such as a locking groove and a locking screw, to prevent accidental movement during processing. In order to facilitate the operator to identify the position of the adjusting screw, the adjustment unit may include a position indicator, such as a dial or a digital readout.

[0032] In one embodiment, based on the above embodiment, refer to Figure 1 and Figure 8 As shown, the modular sliding knife seat 4 is provided with a return top structure 401, and a connecting piece 405 is provided on the return top structure 401. One end of the connecting piece 405 is connected to the precision adjustment mechanism 404, and the other end is connected to the return top structure 401, and the middle is connected to the knife seat body 403.

[0033] Specifically, the modular sliding tool holder 4 includes a return structure 401, a precision adjustment mechanism 404, a tool holder body 403, and a cutting tool clamp 402. The precision adjustment mechanism 404 includes an adjustment unit, and the adjustment unit includes an adjustment nut and an adjustment screw. The adjustment screw is abutted against the inclination push rod 2. By rotating the adjustment nut, the adjustment screw limits the displacement of the inclination push rod 2 under the drive of the nut, thereby accurately controlling the cutting angle and depth of the tool.

[0034] Specifically, the tool holder body 403 is made of high-strength alloy steel with excellent wear resistance and stability, and is used to install and support the entire tool holder structure. One end of the connecting piece 405 is connected to the precision adjustment mechanism 404, and the other end is connected to the return top structure 401. The return top structure 401 is arranged on the top of the tool holder body 403, and is used for the precision adjustment mechanism 404 to return to its original state after processing is completed, and to provide resilience to ensure the stability of the tool during processing. The middle part of the connecting piece 405 is fixedly connected to the tool holder body 403, and the connection method can be a bolt 406 and a screw hole fastening method to achieve a firm locking of the connecting piece 405 on the tool holder body 403. The precision adjustment mechanism 404 includes an adjustment unit, which can limit the movement of the inclination push rod 2 along the cavity of the boring bar body 3 to achieve precise position adjustment of the tool. By operating the adjustment nut of the precision adjustment mechanism 404, the adjusting screw is pressed against the inclination push rod 2. By the depth of the pressing of the inclination push rod 2, the displacement of the inclination push rod 2 is controlled, thereby achieving precise position adjustment of the tool.

[0035] In one embodiment, based on the above embodiment, refer to Figure 1 , Figure 5 , Figure 6 and Figure 7 As shown, the brake module 1 includes an in-place sliding structure 102 , which includes a group of marbles 108 , a spring 109 and a stop block 103 , one end of the spring 109 is in contact with the marble 108 , and the marble 109 abuts against the stop block 103 .

[0036] Specifically, when the main shaft of the boring machine rotates, due to the stopping of the boring bar brake block 101, the stop link 105 in the brake module 1 interacts with the stop block 103, which will drive the drive nut 104 and the boring bar to rotate relative to each other, and the drive nut 104 will move toward the connecting spindle part 301, so that the slope push rod 2 moves toward the connecting spindle part 301, and the slope push rod 2 will move the modular sliding tool seat 4 outward to expand the cutting diameter to meet the requirements of automatic feeding. After the diameter requirement is met, the precision adjustment mechanism 404 will force the modular sliding tool seat 4 to stop moving, thereby stopping the slope push rod 2 and the drive nut 104, and the marble 108 in the in-place sliding structure 102 will force the spring 109 to move backward, so that the stop block 103 and the boring bar brake block 101 rotate relative to each other, making a clicking sound, reminding the worker that the processing is completed.

[0037] In one embodiment, based on the above embodiment, refer to Figure 1 , Figure 5 , Figure 6 and Figure 7As shown, the in-place sliding structure (102) comprises a first bearing (106) and a second bearing (107), wherein the first bearing (106) is arranged on a side of the marble (108) away from the spring (109), and the second bearing (107) is arranged on a side of the spring (109) away from the marble (108).

[0038] Specifically, the first bearing (106) is arranged on the side of the marble (108) away from the spring (109), and the second bearing (107) is arranged on the side of the spring (109) away from the marble (108). This distribution method helps to achieve uniform distribution of load and reduce wear caused by uneven load. The first bearing (106) and the second bearing (107) can be ball bearings, roller bearings or other types of sliding bearings. The bearing material can be stainless steel, bearing steel or other high-performance materials to ensure wear resistance and corrosion resistance. The first bearing (106) and the second bearing (107) are fixed in place on the sliding structure 102. The first bearing (106) and the second bearing (107) can be properly lubricated to reduce friction and increase service life. Grease, oil mist or oil bath lubrication system can be used. The first bearing (106) and the second bearing (107) can be equipped with seals to prevent dust, moisture and other impurities from entering the interior of the bearings, thereby protecting the bearings and extending their service life. The in-place sliding structure 102 facilitates the maintenance and replacement of the bearings to ensure long-term stable operation. The bearings can enable the in-place sliding structure 102 to achieve high-precision positioning and sliding in the precision mechanical system.

[0039] In one embodiment, based on the above embodiment, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the modular sliding tool holder 4 includes a cutting tool holder 402 and one or more replaceable cutting blades. One end of the cutting tool holder 402 abuts against the tool holder body 403, and the other end is connected to the detachable cutting blade.

[0040] Specifically, the modular sliding tool holder 4 is suitable for various cutting processing operations, especially those environments that require frequent replacement of cutting blades. The modular sliding tool holder 4 mainly includes a cutting tool clamp 402 and one or more replaceable cutting blades. The cutting tool clamp 402 is the core component of the modular sliding tool holder 4, which is designed to firmly clamp the cutting blade and allow quick replacement. One end of the cutting tool clamp 402 is designed with a structure that abuts against the tool holder body 403, usually through a thread, a slot or other mechanical locking mechanism. The other end of the cutting tool clamp 402 is designed with a mechanism connected to a detachable cutting blade. This design allows the operator to quickly replace worn or damaged blades.

[0041] In one embodiment, based on the above embodiment, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the cutting tool holder 402 is provided with a plurality of screw holes, and the cutting tool holder 402 is detachably connected to the tool holder body 403 of the modular sliding tool holder 4 by means of bolts cooperating with the screw holes.

[0042] Specifically, the cutting tool clamp 402 is specially designed with a plurality of screw holes, which are evenly distributed on one side of the tool clamp for cooperating with bolts. The design of the screw holes takes into account the strength and stability of the cutting tool clamp 402, while ensuring the alignment and tightening of the bolts. The cutting tool clamp 402 is connected to the tool holder body 403 by bolts. The bolts pass through corresponding holes on the tool holder body 403 and then cooperate with the screw holes on the cutting tool clamp 402 to achieve fixation. When installing the cutting tool clamp 402, position the tool clamp at an appropriate position on the tool holder body 403, ensure that the screw holes are aligned with the bolts on the tool holder body 403, then insert the bolts into the screw holes and tighten them with appropriate tools (such as wrenches) until the cutting tool clamp 402 is firmly connected to the tool holder body 403. This detachable connection design allows for quick replacement of the cutting tool clamp 402, reduces machine downtime, and improves production efficiency. Users can choose cutting tool clamps 402 of different types or sizes according to different cutting tasks. To ensure that the connection will not loosen during the cutting process, the bolts and screw holes have sufficient friction and tightening force, and the bolts are easily accessible, making maintenance and replacement of the cutting tool clamp 402 simple and quick. The cutting tool clamp 402 of the modular sliding tool holder 4 is connected to the tool holder body 403 in a detachable connection manner.

[0043] In one embodiment, based on the above embodiment, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, one end of the boring bar body 3 is provided with a connecting spindle portion 301 , and the connecting spindle portion 301 is connected to the boring machine spindle; the other end of the boring bar body 3 is provided with a connecting portion threadedly connected to the boring bar brake block 101 .

[0044] Specifically, the connecting spindle part 301 is one end of the boring bar body 3, which is used to connect with the boring machine spindle. The connecting part usually includes an internal thread or an adapter to ensure that the boring bar body 3 can be firmly connected to the boring machine spindle. The connecting spindle part 301 may use a flange, a quick tool change system or other mechanical locking mechanism to achieve a fast and accurate connection. The other end of the boring bar body 3 is provided with a connecting part, which is connected to the boring bar brake block 101 through a thread. The boring bar can be quickly locked or released when needed. The connecting part has an external thread that matches the boring bar brake block 101, and the boring bar The brake block 101 has an internal thread. By rotating the boring bar brake block 101, a tight fit with the connecting part can be achieved. The threaded connection can be a standard metric thread, Whitworth thread or other suitable thread types, depending on the design and application requirements of the boring machine. In order to prevent the threaded connection from loosening under vibration or impact loads, spring washers, stop washers, locking nuts or other anti-loosening devices can be used. The connection between the main shaft part 301 and the boring bar body 3 has sufficient rigidity and strength to withstand cutting force and torque, and is convenient for maintenance and replacement of connecting parts to ensure the long-term stable operation of the boring bar body 3.

[0045] In one embodiment, based on the above embodiment, refer to Figure 1 As shown, the drive nut 104 and the slope push rod 2 are detachably connected.

[0046] Specifically, the detachable connection between the drive nut 104 and the slope push rod 2 allows quick disassembly and reassembly when needed, which is convenient for maintenance and replacement of parts. The drive nut 104 is designed with an external thread, and one end of the slope push rod 2 is designed with a matching internal thread. The connection between the two is achieved by screwing the external thread of the drive nut 104 into the internal thread end of the slope push rod 2. In order to ensure the stability of the connection, thread glue or other locking materials can be used at the connection position. When disassembly is required, it is only necessary to use the corresponding tool (such as a wrench) to rotate the slope push rod 2 so that the internal thread end of the drive nut 104 withdraws from the external thread of the drive nut 104 to achieve disassembly. In order to improve the reliability of the connection, a locking mechanism can be provided at the connection between the drive nut 104 and the slope push rod 2, such as using a locking nut or a locking washer. This detachable connection is convenient for occasions where frequent maintenance or replacement of parts is required.

[0047] In one embodiment, based on the above embodiment, refer to Figure 1 As shown, a cavity is provided inside the boring bar body 3 , and the maximum movable space of the in-place sliding structure 102 is consistent with the movable space of the inclined push rod 2 .

[0048] Specifically, the boring bar body 3 is made of high-strength material and is designed with a cavity inside. The cavity extends along the length of the boring bar. The size of the cavity matches the size of the in-place sliding structure 102 and the slope push rod 2 to ensure that both can slide smoothly in the cavity. The in-place sliding structure 102 is installed in the internal cavity of the boring bar body 3 to achieve precise in-place control during the boring process. The slope push rod 2 is located in the internal cavity of the boring bar body 3. The length and diameter of the cavity are sufficient to accommodate the maximum dimensions of the two components. In order to ensure the effective movement of the in-place sliding structure 102 and the slope push rod 2, their movable spaces are consistent.

[0049] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A boring bar, characterized in that: The invention comprises a braking module (1), a boring bar body (3), a slope push rod (2) and a modular sliding tool holder (4), wherein one end of the boring bar body (3) is connected to a main shaft of a boring machine, and the other end is threadedly connected to an external thread of the braking module (1), the boring bar body (3) is provided with a cavity, and a slope push rod (2) is arranged in the cavity, and one end of the slope push rod (2) is connected to the braking module (1) via a driving nut (104), and the cavity is used for the slope push rod (2) to reciprocate, and the two ends of the boring bar body (3) are connected to each other. A modular sliding tool seat (4) is provided between the ends, the slope push rod (2) passes through the hole of the modular sliding tool seat (4), the hole of the modular sliding tool seat (4) can provide the reciprocating motion of the slope portion of the slope push rod (2), one end of the modular sliding tool seat (4) is provided with a precision adjustment mechanism (404), the other end of the modular sliding tool seat (4) is embedded in a cutting tool holder (402), the precision adjustment mechanism (404) is used to adjust the slope portion of the slope push rod (2) to adjust the cutting The cutting depth of the cutting tool is adjusted, the precision adjustment mechanism (404) comprises an adjustment unit, the adjustment unit comprises an adjustment nut and an adjustment screw, the adjustment nut is rotatably arranged on the boring bar body (3), the adjustment nut and the adjustment screw are threadedly connected, one end of the adjustment screw abuts against the inclined portion of the inclined push rod (2); wherein the brake module (1) comprises a boring bar brake block (101), a stop link (105) and an in-place sliding structure (102), the in-place sliding structure (1 02) comprises a group of marbles (108), springs (109) and stop blocks (103), wherein the spring (109) is installed in the boring bar brake block (101), and one end of the spring (109) close to the stop block (103) is in contact with and connected to the marble (108), and the marble (108) abuts against the stop block (103), and the stop block (103) is sleeved on the stop connecting rod (105), and the stop connecting rod (105) is fixedly connected to the drive nut (104).

2. The boring bar according to claim 1, characterized in that The modular sliding knife seat (4) is provided with a return top structure (401), and a connecting piece (405) is provided on the return top structure (401), and one end of the connecting piece (405) is connected to the precision adjustment mechanism (404), and the other end is connected to the return top structure (401).

3. The boring bar according to claim 1, characterized in that The in-place sliding structure (102) comprises a first bearing (106) and a second bearing (107), wherein the first bearing (106) is arranged on a side of the marble (108) away from the spring (109), and the second bearing (107) is arranged on a side of the spring (109) away from the marble (108).

4. The boring bar according to claim 1, characterized in that The modular sliding tool holder (4) comprises a cutting tool holder (402) and one or more replaceable cutting blades. One end of the cutting tool holder (402) abuts against a tool holder body (403) of the modular sliding tool holder (4), and the other end is connected to the detachable cutting blade.

5. The boring bar according to claim 4, characterized in that The cutting tool holder (402) is provided with a plurality of screw holes, and the cutting tool holder (402) is detachably connected to a tool holder body (403) of a modular sliding tool holder (4) by means of bolts cooperating with the screw holes.

6. The boring bar according to claim 1, characterized in that One end of the boring bar body (3) is provided with a connecting spindle portion (301), and the connecting spindle portion (301) is connected to the boring machine spindle; the other end of the boring bar body (3) is provided with a connecting portion threadedly connected to the boring bar brake block (101).

7. The boring bar according to claim 1, characterized in that The driving nut (104) and the slope push rod (2) are detachably connected.

8. The boring bar according to claim 1, characterized in that A cavity is provided inside the boring bar body (3), and the maximum movable space of the in-place sliding structure (102) is consistent with the movable space of the inclined push rod (2).

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