Tool for boring deep hole

Abstract

The utility model relates to the field of boring processing, and discloses a tool for boring a deep hole, which comprises a bottom plate, a fixing mechanism and a rotating mechanism, the fixing mechanism is located above the bottom plate and comprises bearing seats distributed on the left side and the right side of the bottom plate, a workpiece is placed between the bearing seats, and a clamping assembly used for pressing the workpiece is arranged between the bearing seats; the rotating mechanism comprises a connecting cutter handle and a boring cutter rod penetrating through the bearing seat and a workpiece, a blade adjusting assembly used for installing a boring cutter blade is arranged in the middle of the boring cutter rod in the Z-axis direction, one end of the connecting cutter handle is connected with the boring cutter rod, the other end of the connecting cutter handle is connected with a machine tool spindle, and the machine tool spindle drives the connecting cutter handle to rotate so as to drive the boring cutter rod to rotate. The blade adjusting assembly can machine the inner hole of the workpiece. The utility model solves the problem that the existing cutter cannot meet the processing requirements of deep hole parts.

Description

TECHNICAL FIELD

[0001] The utility model relates to boring processing field, concretely relates to a frock for deep hole boring. BACKGROUND

[0002] Boring is a kind of metal cutting process, mainly used to expand and finish the existing hole.For example, the hole on the casting or forging, it removes material by using a tool called boring tool, so as to reach the required diameter, roundness, surface finish and positional accuracy.Boring can be carried out on lathe, boring machine or machining center.

[0003] With the rapid development of manufacturing industry, the precision and performance requirements of mechanical parts are higher and higher.Among them, deep hole parts are widely used in aerospace, shipbuilding, energy equipment and other fields due to their special structure and function.For example, as shown in figures Figure 1 、 2 Valve body as a typical marine parts, usually has flat and long appearance, the inner hole depth is about 1100mm, this kind of deep hole parts not only has strict requirements on processing depth, but also has very high requirements on the surface roughness of inner hole, and its machining precision directly affects the performance and safety of ship.

[0004] At present, the existing deep hole machining method mainly uses ordinary independent boring tool, which is connected to the machine tool for boring machining.This boring tool is connected to the machine tool by single end for machining, and its rigidity is limited due to lack of support point, so the length of tool cannot be too long, otherwise it is easy to break.This processing method has the following difficulties in the process of machining:(1) due to the limitation of tool length, it is difficult to realize the efficient machining of deep hole parts, and frequent tool replacement and adjustment are needed, resulting in low machining efficiency;(2) the method of machining from both ends to the middle can meet the depth requirement, but this method is easy to appear butt joint mark at the middle joint, which affects the machining precision, so the machining precision cannot meet the customer's requirements. SUMMARY

[0005] The utility model intends to provide a frock for deep hole boring to solve the problem that the existing tool cannot meet the machining requirement of deep hole parts.

[0006] To achieve the above object, the utility model discloses the following technical scheme: a tool for deep hole boring, including the bottom plate for supporting workpiece, the fixed mechanism for locating workpiece and the rotating mechanism for carrying out hole processing, the fixed mechanism is located the top of bottom plate, the fixed mechanism includes the bearing seat distributing in the left and right sides of bottom plate, the bearing seat is used for placing workpiece between the bearing seat, the clamping assembly for compacting workpiece is equipped between the bearing seat, the rotating mechanism includes the connection tool handle and the boring bar of boring bar through bearing seat and workpiece, the middle part of boring bar is equipped with the blade adjusting assembly for installing boring blade along Z axle direction, one end of connection tool handle is connected with boring bar, the other end of connection tool handle is connected with machine tool main shaft, machine tool main shaft drives the rotation of connection tool handle, and then drives the rotation of boring bar, and blade adjusting assembly can process workpiece hole.

[0007] The principle of the present application is as follows: in practical application, first, the workpiece is placed horizontally on the bottom plate between the bearing seats to accurately position the workpiece and effectively limit its movement in the left-right direction (i.e., the X-axis direction); after the workpiece is positioned, the clamping assembly is used to compact the workpiece, so that it can be firmly fixed on the bottom plate during processing and is not prone to movement. Then, the boring bar is inserted through the bearing seats and the inner hole of the workpiece, so that the boring bar can accurately reach the processing position. Subsequently, the boring bar is connected to the machine tool spindle through the connection tool handle, and the machine tool spindle drives the rotation of the connection tool handle, which in turn drives the rotation of the boring bar. With the rotation of the boring bar, the blade adjusting assembly located in the middle of the boring bar begins to process the inner hole of the workpiece, thereby realizing the processing of the inner hole of the workpiece.

[0008] The advantages of the present application are as follows: (1) The present application breaks the technical prejudice that the existing deep hole processing tool processes from both ends to the middle, and leaves a mark. By arranging the boring bar, the blade adjusting assembly and the bearing seat, the present application can accurately position the workpiece and provide stable support, ensuring that the boring bar and the blade adjusting assembly can smoothly and efficiently bore deep holes in the inner hole of the workpiece.

[0009] (2) The design of the bearing seat can accurately position the workpiece and effectively limit its movement in the left-right direction, providing a stable and accurate base position for subsequent processing operations, ensuring that the workpiece does not shift in position during the entire processing process, thereby ensuring the accuracy and consistency of the processing.

[0010] (3) The bearing housing not only positions the workpiece but also effectively supports the rotational movement of the boring bar and the boring bar itself. By providing a stable support point for the boring bar, the bearing housing can significantly enhance the rigidity of the boring bar, thereby reducing the risk of it breaking easily due to its excessive length during machining. In addition, it can reduce the vibration and radial runout of the boring bar during high-speed rotation, further improving machining accuracy and surface quality.

[0011] (4) The clamping assembly enables the workpiece to be firmly fixed on the tooling during the processing, making it less likely to move. This greatly reduces the processing error caused by the movement of the workpiece, improves the processing quality and the product qualification rate, and also avoids the damage to the cutting tool and machine tool that may be caused by the shaking of the workpiece, thus extending the service life of the equipment.

[0012] (5) This solution can perform precision boring on deep hole parts, which not only ensures product quality, but also reduces processing costs and improves product production efficiency.

[0013] Preferably, as an improvement, the rotating mechanism further includes a rotating assembly for assisting the rotation of the boring bar, the rotating assembly passing through the boring bar and located inside the bearing housing.

[0014] Beneficial effects: The positional design of the boring bar, rotating assembly, and bearing housing can reduce the radial runout of the boring bar during high-speed rotation, thereby improving machining accuracy; its rotating assembly can ensure that the rotation axis of the boring bar is more stable, avoiding machining errors caused by misalignment.

[0015] Preferably, as an improvement, the rotating assembly includes a connecting rotating hook, and a keyway is provided on one side of the boring bar along the X-axis direction, the connecting rotating hook being engaged in the keyway.

[0016] Beneficial effects: The design of the keyway and connecting rotating hook enables direct power transmission, reduces energy loss in intermediate links, and improves transmission efficiency; the connecting rotating hook ensures synchronous rotation between the boring bar and the machine tool spindle, avoids slippage or slippage, and improves machining accuracy; the cooperation between the keyway and the connecting rotating hook effectively prevents radial displacement of the boring bar during high-speed rotation, enhancing the stability of the overall structure.

[0017] Preferably, as an improvement, the connecting rotating hook is provided with a sleeve that penetrates the boring bar on the side near the workpiece, the connecting rotating hook is connected to the sleeve by screws, and a bearing is provided on the outer side of the sleeve and connected to the bearing by interference fit.

[0018] Beneficial effects: The interference fit between the sleeve and the bearing can generate a certain clamping force between the sleeve and the bearing, which can significantly improve the strength and stability of the connection, effectively prevent the bearing from loosening or falling off during operation, ensure the reliable operation of the boring bar, and effectively limit the radial movement of the boring bar, thereby reducing radial runout, ensuring smoother and more accurate rotation, and thus improving the machining accuracy and quality.

[0019] Preferably, as an improvement, there is a certain gap between the boring bar and the sleeve, the gap being 0.02mm-0.03mm.

[0020] Beneficial effects: The appropriate clearance provides the boring bar with movable space, allowing it to move flexibly back and forth along the inner hole direction within the workpiece's inner hole. This ensures smooth operation during machining, enabling successful machining of the workpiece's inner hole. It also reduces direct contact between the boring bar and the sleeve, thereby reducing friction and wear and extending the service life of both the boring bar and the sleeve. In addition, it facilitates the insertion and removal of the boring bar from the sleeve or inner hole, simplifying the assembly and disassembly process.

[0021] Preferably, as an improvement, the bearing housing is provided with end caps symmetrically on the inner side, and the end caps penetrate the boring bar.

[0022] Beneficial effects: The end cap acts as a seal, preventing iron filings from flying into the bearing housing during processing and causing wear and damage to the bearing housing.

[0023] Preferably, as an improvement, the blade adjustment assembly includes a blade clamping groove, a blade fastening groove, and a blade adjusting groove, which are located at three different positions on the same Z-axis stacked surface in the boring bar, wherein the blade clamping groove and the blade adjusting groove are located in the Z-axis direction, and the blade fastening groove is located in the Y-axis direction and is perpendicular to the blade clamping groove.

[0024] Beneficial effects: The insert clamping groove is used to determine and fix the specific position of the boring bar insert on the boring bar, ensuring that the insert can be accurately installed in the predetermined position for precise cutting operations; the insert fastening groove provides a fastening device to ensure that the insert can be firmly installed on the boring bar, preventing the insert from loosening or shifting during machining; the insert adjustment groove allows the operator to adjust the extension length or thickness of the insert to adapt to different machining needs. That is, by fine-tuning the position of the insert, cutting parameters can be optimized, thereby improving machining accuracy and efficiency.

[0025] Preferably, as an improvement, the clamping assembly includes a support column, a pressure plate and a bolt are provided above the support column, and the bolt passes through the pressure plate and is connected to the base plate.

[0026] Beneficial effects: The clamping assembly provides appropriate clamping force to effectively prevent workpiece deformation or movement during processing; the bolt design allows for adjustment according to different workpiece thicknesses, enabling the same equipment to be used for workpieces of various specifications, and operators can quickly adjust the bolt height as needed, thereby rapidly adapting to different processing requirements and improving production efficiency.

[0027] Preferably, as an improvement, the pressure plate has a U-shaped groove structure.

[0028] Beneficial effects: The U-shaped groove can evenly distribute the clamping force, ensuring the workpiece remains stable during processing, reducing vibration and displacement, and ensuring the workpiece maintains a precise position during processing, thus improving processing accuracy; the opening design of the U-shaped groove can better adapt to workpieces of different shapes and sizes, and has strong versatility; the U-shaped groove structure is simple, and the clamping operation is convenient and quick, which can significantly improve production efficiency. It also facilitates observation of the workpiece clamping status, allowing for rapid adjustments.

[0029] Preferably, as an improvement, the base plate is provided with a blower assembly for conveying compressed air, the blower assembly including a compressed air input pipe and a compressed air output pipe.

[0030] Beneficial effects: Compressed air can effectively remove the heat generated during the cutting process, prevent the tool (i.e., boring bar and insert adjustment assembly) from overheating, thereby reducing tool wear and significantly extending tool life; it can also clean up chips in time, prevent chips from scratching the workpiece surface during processing, ensure the surface finish and dimensional accuracy of the workpiece, reduce vibration and instability caused by chip accumulation, ensure the stability and consistency of the processing process, and improve processing accuracy.

[0031] The beneficial effects of this solution are: (1) The boring bar can adapt to the machining requirements of deep holes with different diameters and lengths by adjusting the cutting tool adjustment assembly, which increases the versatility of the equipment. At the same time, the cutting tool adjustment assembly allows for quick adjustment of the position and angle of the cutting tool according to specific machining requirements, which improves the operational flexibility and response speed.

[0032] (2) The base plate is equipped with a good cooling system and chip removal channel (i.e., air blowing assembly), which can effectively remove the heat and chips generated during the boring bar cutting process, reduce tool wear, and extend tool life.

[0033] (3) The design of the boring bar and bearing seat effectively reduces vibration during the machining process and reduces potential safety hazards caused by vibration. Its precise positioning and stable support ensure that the workpiece will not be deformed or displaced during the machining process, thus improving the safety and reliability of the machining.

[0034] (4) The tooling in this solution not only significantly improves machining accuracy and operational flexibility, but also greatly enhances production efficiency. At the same time, this solution effectively saves machining costs, reduces scrap rates due to dimensional deviations, and minimizes raw material waste. Furthermore, it extends tool life, enhances operational safety, and comprehensively improves machining quality. Attached Figure Description

[0035] Figure 1 A schematic diagram of the workpiece structure provided in the embodiment of this utility model. Figure 1 .

[0036] Figure 2 A schematic diagram of the workpiece structure provided in the embodiment of this utility model. Figure 2 .

[0037] Figure 3 A schematic diagram of the structure of a tooling for deep hole boring provided in an embodiment of this utility model. Figure 1 .

[0038] Figure 4 A schematic diagram of the structure of the bottom plate of a tooling for deep hole boring provided in this embodiment of the present invention. Figure 1 .

[0039] Figure 5 A schematic diagram of the bearing housing structure in a tooling for deep hole boring provided by an embodiment of this utility model. Figure 1 .

[0040] Figure 6 A schematic diagram of the bearing housing structure in a tooling for deep hole boring provided by an embodiment of this utility model. Figure 2 .

[0041] Figure 7 This is a schematic diagram of the structure of a tooling end cap for deep hole boring provided in an embodiment of the present invention.

[0042] Figure 8 A schematic diagram of the structure of the bottom plate of a tooling for deep hole boring provided in this embodiment of the present invention. Figure 2 .

[0043] Figure 9 A schematic diagram of the rotating assembly in a tooling for deep hole boring provided by an embodiment of this utility model. Figure 1 .

[0044] Figure 10 A schematic diagram of the rotating assembly in a tooling for deep hole boring provided by an embodiment of this utility model. Figure 2 .

[0045] Figure 11A schematic diagram of the rotating assembly in a tooling for deep hole boring provided by an embodiment of this utility model. Figure 3 .

[0046] Figure 12 A schematic diagram of the rotating assembly in a tooling for deep hole boring provided by an embodiment of this utility model. Figure 4 .

[0047] Figure 13 This is a schematic diagram of the structure of a boring bar in a tooling for deep hole boring provided in an embodiment of the present invention.

[0048] Figure 14 for Figure 13 A partial sectional view of C.

[0049] Figure 15 A schematic diagram of the structure of a tooling for deep hole boring provided in an embodiment of this utility model. Figure 2 . Detailed Implementation

[0050] The following detailed description illustrates the specific implementation method:

[0051] The reference numerals in the accompanying drawings include: base plate 1, bearing seat 2, support column 3, pressure plate 4, end cover 5, locating pin 6, workpiece 7, boring bar 8, bearing 9, sleeve 10, connecting rotating hook 11, connecting tool holder 12, keyway 13, blade adjusting assembly 14, blade clamping groove 141, blade fastening groove 142, blade adjusting groove 143, compressed air input pipe 15, compressed air output pipe 16, worktable 17, pad block 18, mounting groove 19.

[0052] like Figure 1 , Figure 2 As shown, the valve body is selected as the workpiece 7 to be processed. The valve body is a marine part, which usually has a flat and long appearance and an inner hole depth of about 1100mm.

[0053] The implementation examples are basically as follows Figure 3As shown: A tooling for deep hole boring includes a base plate 1 for supporting a workpiece 7, a fixing mechanism for positioning the workpiece 7, and a rotating mechanism for machining the inner hole. The fixing mechanism is located above the base plate 1. The fixing components include bearing seats 2 distributed on the left and right sides of the base plate 1, with the workpiece placed between the bearing seats. A clamping assembly for clamping the workpiece 7 is installed between the bearing seats 2. The rotating mechanism passes through the bearing seats and includes a tool holder 12 and a boring bar 8 that passes through the bearing seats 2 and the workpiece 7. The boring bar 8 has a tool adjustment assembly 14 (located in the inner hole of the workpiece 7 and blocked by the workpiece 7) for mounting boring tool inserts along the Z-axis direction in the middle. One end of the tool holder 12 is connected to the boring bar 8, and the other end of the tool holder 12 is connected to the machine tool spindle. The machine tool spindle drives the tool holder 12 to rotate, thereby driving the boring bar 8 to rotate, so that the tool adjustment assembly 14 can perform boring machining on the inner hole of the workpiece 7.

[0054] Specifically, such as Figure 4 As shown, the base plate 1 is equipped with several mounting holes, mounting slots 19, locating pins 6, pads 18, and a blower assembly according to the structure of the workpiece 7. The mounting holes and mounting slots 19 are used to determine the installation position of the fixing mechanism, enabling accurate and stable installation of the fixing mechanism in the required position on the base plate 1, thereby improving the stability and accuracy of the machining process and simplifying the installation and maintenance process. The locating pins 6 are used to align with the circular hole below the workpiece 7 to achieve precise positioning of the workpiece 7, while also elevating the workpiece 7 so that a gap is formed between the workpiece 7 and the base plate 1 when the workpiece 7 is placed, facilitating the discharge of iron filings from the circular hole below the workpiece 7. The pads 18 are used to adjust the height of the workpiece 7 so that the center of the hole in the workpiece 7 is aligned with the center of the hole in the bearing seat 2, ensuring that the boring bar 8 passes smoothly through the inner hole of the workpiece 7, and creating a gap between the lower plane of the workpiece 7 and the middle of the base plate 1, facilitating the discharge of iron filings from the circular hole below the workpiece 7. The blower assembly is used to deliver compressed air and can be adjusted and positioned arbitrarily according to requirements. Specifically, the air blowing assembly is located at the lower right of the base plate 1. The air blowing assembly includes a compressed air input pipe 15 and a compressed air output pipe 16, which transport compressed air to the through hole below the workpiece 7. The compressed air effectively removes heat generated during the cutting process, preventing the tool (i.e., the boring bar 8 and the insert adjustment assembly 14) from overheating, thereby reducing tool wear and significantly extending tool life. It also promptly removes chips, preventing chips from scratching the surface of the workpiece 7 during processing, ensuring the surface finish and dimensional accuracy of the workpiece 7, reducing vibration and instability caused by chip accumulation, ensuring the stability and consistency of the processing, and improving processing accuracy. In this embodiment, the base plate 1 has a length of 1500mm, which can be adjusted arbitrarily according to the workpiece requirements. The positions of the pad 18 and the positioning pin 6 can also be adjusted arbitrarily according to the workpiece structure.

[0055] The fixing mechanism includes several bearing housings 2, such as Figure 5 , Figure 6 As shown, bearing housings 2 are symmetrically mounted on the left and right sides of the base plate 1, used to position the workpiece 7 and support the rotation of the rotating mechanism. Specifically, the bearing housings 2 are installed in the mounting grooves 19 of the base plate 1, and are connected to the mounting holes on the base plate 1 by bolts passing through the side flanges of the bearing housings 2, thereby ensuring that the bearing housings 2 can be accurately and securely fixed to the base plate 1. Figure 7 As shown, the bearing housing 2 has a through hole, and end caps 5 are installed on both sides of the through hole. The end caps 5 serve a sealing function to prevent iron filings from flying into the bearing housing 2 during machining and causing wear and damage to the bearing housing 2. Figure 8 As shown, a clamping assembly is installed between the bearing seats 2. The clamping assembly includes a support column 3 and a pressure plate 4. The support column 3 is vertically installed on the front and rear sides of the base plate 1. The pressure plate 4 is bolted to the top of the support column 3. The workpiece 7 is placed between the pressure plate 4 and the base plate 1. The bolts pass through the pressure plate 4 and are connected to the support column 3. By adjusting the height of the bolts, the pressure plate 4 can be adjusted to move downwards, thereby clamping the workpiece 7.

[0056] In this embodiment, the spacing and installation position between the bearing seats 2 can be designed according to the length of the workpiece to accommodate the processing of workpieces of different lengths. Specifically, in this embodiment, the spacing between the bearing seats 2 is 1245mm. Furthermore, the pressure plate has a U-shaped groove structure. The opening design of its U-shaped groove can better accommodate workpieces 7 of different shapes and sizes, exhibiting strong versatility. At the same time, the U-shaped groove structure is simple, making clamping operations convenient and quick, and facilitating observation of the clamping status of the workpiece 7, thus allowing for rapid adjustments.

[0057] like Figure 9 , Figure 10 As shown, the rotating mechanism includes a boring bar 8 and a rotating assembly for assisting the rotation of the boring bar 8. The rotating assembly passes through the boring bar 8 and is located inside the bearing housing 2, that is, the rotating assembly is located between the bearing housing 2 and the boring bar 8. A connecting tool holder 12 is connected to the right end of the boring bar 8, and the connecting tool holder 12 is used to connect the machine tool spindle and the boring bar 8. Figure 11 , Figure 12As shown, the rotating assembly includes a connecting rotating hook 11, a sleeve 10, and a bearing 9. A keyway 13 is arranged along the X-axis in the middle of the boring bar 8, and the connecting rotating hook 11 is installed within the keyway 13. The connecting rotating hook 11 ensures synchronous rotation between the boring bar 8 and the machine tool spindle, avoiding slippage and improving machining accuracy. The fit between the keyway 13 and the connecting rotating hook 11 effectively prevents radial displacement of the boring bar 8 during high-speed rotation, enhancing the overall structural stability. A sleeve 10, penetrating the boring bar 8, is installed at the left end of the connecting rotating hook 11. The connecting rotating hook 11 is mounted on the sleeve 10 with screws, and a bearing 9 is installed on the outer side of the sleeve 10 and connected to the bearing 9 via an interference fit. The boring bar 8 and the sleeve 10 have a certain gap, ranging from 0.02mm to 0.03mm. The appropriate gap provides the boring bar 8 with movable space, allowing it to move flexibly in the inner hole of the workpiece 7 along the inner hole direction. This ensures smooth operation during the machining process, enabling the machining of the inner hole of the workpiece 7 to be completed smoothly. It also reduces the direct contact between the boring bar 8 and the sleeve 10, thereby reducing friction and wear and extending the service life of the boring bar 8 and the sleeve 10.

[0058] like Figure 13 As shown, a cutting tool adjustment assembly 14 is arranged in the Z-axis direction at the middle of the boring bar 8, which can adjust the cutting tool size to adapt to the machining requirements of changing inner hole dimensions of the workpiece 7. Figure 14 As shown, the insert adjustment assembly 14 is located at three different positions on the same Z-axis stacked surface of the boring bar 8. The insert adjustment assembly 14 includes an insert clamping groove 141, an insert fastening groove 142, and an insert adjustment groove 143. The insert clamping groove 141 and the insert adjustment groove 143 are located on the Z-axis, with the insert clamping groove 141 located below the insert adjustment groove 143. The insert fastening groove 142 is located on the Y-axis and is perpendicular to the insert clamping groove 141. The insert clamping groove 141 is used to determine and fix the specific position of the boring bar insert to ensure that the boring bar insert can be accurately installed in the predetermined position for precise cutting operations. The insert fastening groove 142 is used to provide a fastening device to ensure that the boring bar insert is firmly installed on the boring bar 8, preventing the boring bar insert from loosening or shifting during machining. The insert adjustment groove 143 allows the operator to adjust the extension length or thickness of the boring bar insert to accommodate machining requirements of different inner hole diameters. By fine-tuning the insert position, cutting parameters can be optimized, improving machining accuracy and efficiency. The combined action of the insert clamping groove 141, insert fastening groove 142, and insert adjustment groove 143 ensures efficient and precise cutting operations. The insert position and angle can be flexibly adjusted according to different machining needs, thereby ensuring the accuracy and consistency of the cutting process. In this embodiment, both the insert adjustment groove 143 and the insert fastening groove 142 are bolt grooves, facilitating fine adjustments by the operator.

[0059] The specific implementation process is as follows:

[0060] Before processing: such as Figure 15 As shown, the entire fixture is horizontally and stably fixed on the worktable 17. First, the base plate 1 is fixed to the worktable 17, and several positioning pins 6 and pads 18 are installed on the base plate 1 (the positioning pins 6 and pads 18 are covered by the workpiece). The workpiece 7 is placed horizontally on the positioning pins 6 and pads 18, and the workpiece 7 is located between the bearing seats 2. After the workpiece is placed, bolts are used to pass through the pressure plate 4 and connect it to the base plate 1. The pressure plate 4 is installed above the support column 3, so that the workpiece 7 is located between the pressure plate 4 and the base plate 1. By adjusting the height of the bolts, the pressure plate 4 presses down on the workpiece 7 to achieve stable fixation of the workpiece 7. After the workpiece is fixed, a suitable boring bar insert is selected according to the material and processing requirements and installed in the insert adjustment assembly 14. Then, a rotating assembly (referred to as the first set of rotating assemblies) is installed on the side near the head end of the boring bar 8. The first rotating assembly passes through the boring bar 8. A rotating assembly (referred to as the second set of rotating assemblies) is installed on the side of the tail end of the boring bar 8. The second rotating assembly passes through the boring bar 8. After the rotating components are installed, the first rotating component, the second rotating component, and the boring bar 8 pass through the bearing housing 2 and are fixedly installed in the bearing housing 2 by the end cover 5. Specifically, the boring bar 8 passes through the workpiece 7 and the bearing housing 2, that is, the first rotating component and part of the boring bar 8 pass through the right bearing housing 2 and are fixedly installed in the bearing housing 2 by the end cover 5, and the second rotating component and part of the boring bar 8 pass through the left bearing housing 2 and are fixed in the bearing housing 2 by the end cover 5. Finally, the head end of the boring bar 8 is connected to the machine tool spindle through the connecting tool holder 12.

[0061] During processing: (1) When the inner diameter of the workpiece 7 is the same: First, adjust the speed, feed rate and cutting depth on the machine tool according to the specific situation of the workpiece 7, and then start the machine tool. The machine tool spindle drives the connecting tool holder 12 to rotate, which in turn drives the boring bar 8 to rotate. The keyway 13 in the middle of the boring bar 8 is engaged with the connecting rotating hook. The connecting rotating hook is connected to the sleeve 10 by screws, so that the rotation of the boring bar 8 drives the sleeve 10 to rotate. The sleeve 10 is connected to the inner ring of the bearing 9 by interference fit. Therefore, the bearing 9 will rotate with the sleeve 10, so that the bearing 9, the sleeve 10 and the boring bar 8 rotate at the same time, realizing the coordinated operation of the entire rotating assembly. The boring bar 8 moves into the hole gradually at the set feed rate to boring, gradually reaching the predetermined depth, so as to realize the processing of the inner hole of the workpiece 7. Meanwhile, during the boring process of workpiece 7, compressed air flows to the inner hole of workpiece 7 through compressed air input pipe 15 and compressed air output pipe to remove the heat generated during boring, prevent the tool (i.e., boring bar 8, boring insert) from overheating, and clean the chips in time to avoid chips scratching the surface of workpiece 7 during the machining process, ensuring the surface finish and dimensional accuracy of workpiece 7, reducing vibration and instability caused by chip accumulation, and avoiding affecting the machining quality.

[0062] (2) When the inner diameter of workpiece 7 is not the same: After completing the machining of one type of inner diameter, pause the machine tool and stop machining. Then, replace the boring tool insert on the insert adjustment assembly 14 or adjust the extension length of the boring tool insert to adapt to the machining of the other diameter, and then continue the subsequent machining.

[0063] Machining complete: After boring is completed, the boring bar 8 exits the inner hole along the set path to avoid scratching the hole wall. Then, machining is stopped and the workpiece 7 is removed.

[0064] This solution overcomes the technical bias of existing deep hole machining tools that produce butt joint marks when machining from both ends. Through the configuration of the boring bar 8, insert adjustment assembly 14, rotating assembly, clamping assembly, and bearing seat 2, this solution not only precisely positions the workpiece 7 but also provides stable support, ensuring that the boring bar 8 and insert adjustment assembly 14 can smoothly penetrate the inner hole of the workpiece 7 for efficient deep hole boring. The bearing seat 2 precisely positions the workpiece 7 and provides a support point for the boring bar 8, providing a stable and accurate base position for subsequent machining operations. The clamping assembly clamps the workpiece 7 from top to bottom, making it less prone to movement during machining, greatly reducing machining errors caused by workpiece movement, and improving machining quality and product yield. The insert adjustment assembly 14 allows for rapid adjustment of the insert position and angle according to specific machining requirements, improving operational flexibility and response speed. The blowing assembly effectively removes heat and chips generated during cutting, reducing tool wear and extending tool life.

[0065] In summary, this solution enables precision boring of deep-hole parts, ensuring product quality, reducing processing costs, and improving production efficiency.

[0066] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A tooling for deep hole boring, characterized in that: The device includes a base plate for supporting the workpiece, a fixing mechanism for positioning the workpiece, and a rotating mechanism for machining the inner hole. The fixing mechanism is located above the base plate and includes bearing seats distributed on the left and right sides of the base plate. The workpiece is placed between the bearing seats, and a clamping assembly for pressing the workpiece is provided between the bearing seats. The rotating mechanism includes a connecting tool holder and a boring bar that passes through the bearing seats and the workpiece. The boring bar has an insert adjusting assembly for mounting boring inserts along the Z-axis in its middle section. One end of the connecting tool holder is connected to the boring bar, and the other end of the connecting tool holder is connected to the machine tool spindle. The machine tool spindle drives the connecting tool holder to rotate, thereby driving the boring bar to rotate, so that the insert adjusting assembly can machine the inner hole of the workpiece.

2. The tooling for deep hole boring according to claim 1, characterized in that: The rotating mechanism further includes a rotating assembly for assisting the rotation of the boring bar, the rotating assembly passing through the boring bar and located inside the bearing housing.

3. The tooling for deep hole boring according to claim 2, characterized in that: The rotating assembly includes a connecting rotating hook, and a keyway is provided on one side of the boring bar along the X-axis direction, and the connecting rotating hook is engaged in the keyway.

4. The tooling for deep hole boring according to claim 3, characterized in that: The connecting rotating hook has a sleeve that passes through the boring bar on the side near the workpiece. The connecting rotating hook is connected to the sleeve by screws. The outer side of the sleeve is provided with a bearing and is connected to the bearing by an interference fit.

5. A tooling for deep hole boring according to claim 4, characterized in that: There is a certain gap between the boring bar and the sleeve, which ranges from 0.02mm to 0.03mm.

6. The tooling for deep hole boring according to claim 1, characterized in that: The bearing housing is symmetrically provided with end caps on its inner side, and the end caps penetrate the boring bar.

7. A tooling for deep hole boring according to claim 1, characterized in that: The blade adjustment assembly includes a blade clamping groove, a blade fastening groove, and a blade adjusting groove, which are located at three different positions on the same Z-axis stacked surface in the boring bar. The blade clamping groove and the blade adjusting groove are located in the Z-axis direction, and the blade fastening groove is located in the Y-axis direction and is perpendicular to the blade clamping groove.

8. A tooling for deep hole boring according to claim 1, characterized in that: The clamping assembly includes a support column, a pressure plate and a bolt above the support column, and the bolt passes through the pressure plate and connects to the base plate.

9. A tooling for deep hole boring according to claim 8, characterized in that: The pressure plate has a U-shaped groove structure.

10. A tooling for deep hole boring according to claim 1, characterized in that: The base plate is provided with a blower assembly for conveying compressed air, the blower assembly including a compressed air input pipe and a compressed air output pipe.

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