Boring cutter bar device for deep hole machining based on machine tool equipment

Abstract

The utility model provides a boring cutter bar device for deep hole machining based on machine tool equipment, and belongs to the technical field of machining devices. Comprising a rotating shaft, a left large-end combined bearing seat assembly, a right-end combined bearing seat assembly, a boring cutter device and a small cutter frame device. The rotating shaft is connected with the power output end of a machine tool, a left large-end combined bearing seat assembly and a right-end combined bearing seat assembly are arranged on the rotating shaft in an axial sliding mode, and the left large-end combined bearing seat assembly and the right-end combined bearing seat assembly are coaxially and fixedly connected with the two ends of a machined through hole in a large component when used. A boring cutter device and a small cutter frame device are arranged in the middle of the rotating shaft, and are arranged in a processed through hole in a large component when being used; the rotating shaft rotates along with the machine tool spindle, the large component moves in a reciprocating mode in the axial direction of the rotating shaft under the movement of the machine tool platform and the supporting of the combined bearing seat assemblies on the two sides, inner hole machining of the large component is achieved, and the problem that deep hole machining cannot be achieved due to equipment restriction is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining devices, and particularly relates to a boring bar device for deep hole machining based on machine tool equipment. Background Art

[0002] With the improvement of industrialization level, in large construction fields such as petrochemical, wind power, metallurgical construction, and aerospace engineering, there are a large number of large components and equipment with a weight of tens of tons or hundreds of tons. At the same time, with the application of the modularization method, in the process of production and manufacturing, many processing problems are faced. For example, the processing of these large components cannot be achieved on existing machine tools. Restricted by existing equipment factors, the processing accuracy is poor, and the use requirements for deep hole machining of machine parts cannot be met. Therefore, it is necessary to design a deep boring mechanism for the bracket, which can be applied to the on-site machining of deep inner holes of pipelines, coaxial spaced holes, through holes of large equipment, and the machining and repair of internal cut grooves and hole step shoulders. Summary of the Utility Model

[0003] The technical problem solved by the utility model is as follows: to provide a boring bar device for deep hole machining based on machine tool equipment. The purpose of the utility model is to design a boring bar device, combined with existing machine tool equipment, which can achieve precision boring of the inner hole of large components, internal hole turning of the end face, deep hole grooving, and precision repair of the hole step shoulder surface, solve the deep hole machining that cannot be achieved due to the restriction of existing equipment, ensure the processing quality, and improve the work efficiency.

[0004] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0005] A boring bar device for deep hole machining based on machine tool equipment includes a rotating shaft, a left large-end combined bearing seat assembly, a right-end combined bearing seat assembly, a boring tool device, and a small tool rest device;

[0006] The rotating shaft penetrates through the through hole of the large component to be machined during use, and one end of the rotating shaft is connected to the power output end of the machine tool;

[0007] The left large-end combined bearing seat assembly is coaxially and axially slidably sleeved on the rotating shaft, and the left large-end combined bearing seat assembly is coaxially and fixedly connected to the outside of one end of the through hole of the large component to be machined during use;

[0008] The right-end combined bearing seat assembly is coaxially and axially slidably sleeved on the rotating shaft, and the right-end combined bearing seat assembly is coaxially and fixedly connected to the outside of the other end of the through hole of the large component to be machined during use;

[0009] The boring tool device is fixed at the middle position of the rotating shaft, and the boring tool device is placed inside the through hole of the large component to be machined during use and is used for precision boring;

[0010] The small tool rest device is fixed at the middle position of the rotating shaft. When in use, the small tool rest device is placed inside the through hole to be machined on the large component and is used for facing, deep hole grooving, and precision machining of the hole step shoulder surface.

[0011] For further limitation of the above solution, the rotating shaft is formed by coaxially connecting a feed end shaft and an output end shaft;

[0012] The feed end shaft includes a feed end shaft body, and a feed end shaft end plate is coaxially and fixedly sleeved on the right end of the feed end shaft body;

[0013] The output end shaft includes an output end shaft body. A tool mounting frame structure for mounting a boring tool device and a small tool rest device is connected to the left end of the output end shaft body. The feed end shaft end plate of the feed end shaft is connected to the tool mounting frame structure of the output end shaft to ensure the coaxiality of the feed end shaft and the output end shaft.

[0014] For further limitation of the above solution, the tool mounting frame structure of the output end shaft is formed by connecting a middle vertical seat plate I and a middle vertical seat plate II arranged left and right and two middle horizontal seat plates arranged up and down. The middle vertical seat plate I is coaxially and fixedly connected to the output end shaft body. The feed end shaft end plate and the middle vertical seat plate II are coaxially connected through a spigot structure and a shaft connecting bolt. The spigot structure includes a spigot boss provided on the feed end shaft end plate and a spigot groove provided on the middle vertical seat plate II.

[0015] For further limitation of the above solution, a measuring hole is provided at one end of the output end shaft body close to the tool mounting frame structure.

[0016] For further limitation of the above solution, the left large end combined bearing seat assembly includes a left end combined bearing seat assembly and a tool changer. The tool changer is a circular frame structure. When in use, the right end of the tool changer is coaxially and fixedly connected to the outside of one end of the through hole to be machined on the large component through a tool changer positioning pin and a tool changer connecting bolt. The center hole of the tool changer is sleeved on the feed end shaft with a clearance, and the left end combined bearing seat assembly is coaxially fixed at the left end of the tool changer;

[0017] The left end combined bearing seat assembly includes a left end bearing seat, two left end face bearings, a left end roller bearing, and a left end copper sleeve bearing. The left end copper sleeve bearing is sleeved on the feed end shaft body. The outside of the left end copper sleeve bearing is supported inside the left end bearing seat by the left end roller bearing in the middle and the two left end face bearings on both sides. The left end bearing seat and the feed end shaft body are sealed by a left end sealing strip. The left side of the left end bearing seat is covered by a left end bearing gland, and a left end bearing oil nozzle is provided on the left end bearing seat.

[0018] For further limitation of the above solution, the right-end combined bearing seat assembly includes a right-end bearing seat, two right-end face bearings, a right-end roller bearing, and a right-end copper sleeve bearing. The right-end copper sleeve bearing is sleeved on the output shaft body. The outside of the right-end copper sleeve bearing is supported inside the right-end bearing seat by the right-end roller bearing in the middle and the two right-end face bearings on both sides. The right-end bearing seat and the output shaft body are sealed by a right-end sealing strip. The right end of the right-end bearing seat is covered by a right-end bearing gland. When in use, the right-end bearing seat is coaxially and fixedly connected to the outside of the other end of the through hole machined on the large component through a right-end bearing seat connecting bolt. A right-end bearing oil nozzle is provided on the right-end bearing seat.

[0019] For further limitation of the above solution, the boring tool device includes a tool block slide. The tool block slide is fixed on the tool mounting frame structure. The center of the tool block slide is perpendicular to and intersects with the axis of the rotating shaft. The tool block slide adopts a dovetail slideway connection structure. A fine boring head is fixed on the tool block slide.

[0020] For further limitation of the above solution, the small tool rest device includes a servo motor slide module and a small tool rest. The servo motor slide module is fixed on the tool mounting frame structure and its center line is perpendicular to and intersects with the axis of the rotating shaft. The small tool rest is fixed on the servo motor slide module through a small tool rest positioning pin and a small tool rest fixing bolt. A machining tool is fixedly connected to the small tool rest through a tool fixing bolt. A limit switch is provided on the small tool rest.

[0021] For further limitation of the above solution, the servo motor slide module includes a servo motor, a lead screw, and a slider. The servo motor is fixed on the tool mounting frame structure. The lead screw is rotationally supported on the tool mounting frame structure through bearings. The servo motor is connected to the input end of the lead screw through a belt drive. The slider is screwed onto the lead screw. The two sides of the slider are limited by baffles. The right end of the output shaft body is fixedly connected with a rotating circuit through a rotating circuit support. An axial through hole is provided inside the output shaft body. The built-in wires and limit wires of the rotating circuit are connected to the servo motor and the limit switch through the axial through hole.

[0022] For further limitation of the above solution, the left end of the feed end shaft is connected to the machine tool power output end through a universal joint connection assembly. The universal joint connection assembly includes a universal joint intermediate shaft. Both the left and right ends of the universal joint intermediate shaft are connected with universal joint ends through cross pins. Universal joint oil filling holes are provided at both ends of the universal joint intermediate shaft. The right universal joint end is connected to the left end of the feed end shaft body through a feed end connection disk. The left universal joint end is connected to the machine tool power output end through a tool shank end connection disk.

[0023] Advantages of the present utility model compared with the prior art:

[0024] 1. The double-direction bracket deep-hole boring bar device designed in this solution uses a rotating shaft connected to the power output end of the machine tool. Axially slidable on the rotating shaft are a left large-end combined bearing seat assembly and a right-end combined bearing seat assembly. When in use, the left large-end combined bearing seat assembly and the right-end combined bearing seat assembly are coaxially and fixedly connected to both ends of the through-hole to be machined on the large component. A boring tool device and a small tool rest device are provided in the middle of the rotating shaft. When in use, both the boring tool device and the small tool rest device are placed inside the through-hole to be machined on the large component. The rotating shaft of this structure rotates with the main shaft of the machine tool, and the large component reciprocates axially along the rotating shaft under the movement of the machine tool platform and the support of the combined bearing seat assemblies on both sides, realizing fine boring of the inner hole of the large component, turning the end face of the inner hole, grooving the deep hole, and precision machining of the shoulder face of the hole step on the basis of the existing machine tool. It effectively solves the problem of deep-hole machining that cannot be achieved due to equipment constraints. The manufacturing cost of the entire bracket deep-boring mechanism is low, the processing and maintenance cycle is short, the cutting machining dimensions are reliable, the processing deep-hole size range is wide, the cutting is without tremor, powerful, supports heavy cutting with large feed rates, and has high efficiency.

[0025] 2. The left and right end combined bearing seat assemblies in this solution are installed with the bracket deep-boring mechanism equipment by using pin positioning and bolt connection and fastening methods, ensuring the concentricity and coaxiality of the bearing seats at both ends, and forming the design advantages of integrating the bracket deep-boring mechanism with the workpiece.

[0026] 3. In this solution, roller bearings are installed in the bearing seats at both ends. This bearing has a large load-bearing capacity, automatic adjustment, and self-aligning performance. It can withstand radial heavy loads and impact loads, and can also withstand a certain amount of bidirectional axial loads. Two end face bearings are installed on both sides of the roller bearing, mainly to support the rotating shaft, reduce the friction coefficient during the movement of the shaft, and ensure its rotation accuracy and stability. A self-lubricating graphite copper sleeve bearing is installed inside the inner ring of the roller bearing, further reducing the friction coefficient, reducing energy loss, improving transmission efficiency, and at the same time reducing the consumption of oil products and the generation of waste oil, which is beneficial to energy conservation and emission reduction.

[0027] 4. In this solution, the rotating shaft is divided into a feed end shaft and an output end shaft. The feed end shaft and the output end shaft are separately processed, and the length of the shaft can be designed according to the drawing requirements of the depth of the hole to be machined on the workpiece, effectively solving the actual processing difficulty of the long shaft and reducing the vibration, bending deformation, and thermal deformation of the shaft during turning and grinding processes. The connection between the feed end shaft and the output end shaft uses spigot positioning and bolt connection methods, effectively ensuring the positional accuracy and concentricity of the two ends of the shaft center.

[0028] 5. In this solution, the feed end shaft is connected to the horizontal head of the power output end of the machine tool by a universal joint coupling, which can reliably transmit torque and power, has a compact structure, and high transmission efficiency.

[0029] 6. In this solution, the tool block slide is fixed on the output end shaft and adjusted by a precision fine-tuning unit. The minimum adjustment scale is 0.005 mm, which is very convenient for adjusting and correcting the boring hole size. The blade seat and the tool tip are fastened by a three-sided tight-fitting method, greatly increasing the rigidity. Moreover, the equal height error of the blade seat is less than 0.02 mm, greatly improving the quality of deep hole boring workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The front view of the structure of a double-direction bracket deep hole boring tool bar device provided by the present utility model;

[0031] Figure 2 For the present utility model Figure 1 The sectional view taken along the line A-A shown in the present utility model;

[0032] Figure 3 For the present utility model Figure 2 The sectional view taken along the line B-B shown in the present utility model;

[0033] Figure 4 For the present utility model Figure 2 The enlarged schematic view of the structure of part Ⅰ shown in the present utility model;

[0034] Figure 5 The top view of the structure of a double-direction bracket deep hole boring tool bar device provided by the present utility model;

[0035] Figure 6 For the present utility model Figure 5 The sectional view taken along the line C-C shown in the present utility model;

[0036] Figure 7 For the present utility model Figure 5 The enlarged schematic view of the structure of part Ⅱ shown in the present utility model;

[0037] Figure 8 The three-dimensional structure schematic view of the feed end shaft in the present utility model;

[0038] Figure 9 The internal structure sectional view of the feed end shaft in the present utility model;

[0039] Figure 10 The three-dimensional structure schematic view of the output end shaft in the present utility model;

[0040] Figure 11 The front view of the structure of the output end shaft in the present utility model;

[0041] Figure 12 For the present utility model Figure 11 The sectional view taken along the line D-D shown in the present utility model;

[0042] Figure 13 For the present utility model Figure 11Schematic diagram of the E-direction structure shown in

[0043] Figure 14 Schematic perspective view of the small knife holder in the present utility model;

[0044] Figure 15 Front view of the structure of the small knife holder in the present utility model;

[0045] Figure 16 Top view of the structure of the small knife holder in the present utility model;

[0046] Figure 17 Left view of the structure of the small knife holder in the present utility model;

[0047] Figure 18 Schematic perspective view of the connecting disk at the handle end in the present utility model;

[0048] Figure 19 Front view of the structure of the connecting disk at the handle end in the present utility model;

[0049] Figure 20 Top view of the structure of the connecting disk at the handle end in the present utility model;

[0050] Figure 21 Bottom view of the structure of the connecting disk at the handle end in the present utility model;

[0051] Figure 22 The present utility model Figure 21 Schematic diagram of the F-F direction structure shown in

[0052] Figure 23 Schematic perspective view of the servo motor slide table module in the present utility model;

[0053] Figure 24 Top view of the servo motor slide table module in the present utility model;

[0054] Figure 25 In the present utility model Figure 24 Schematic diagram of the G-G direction structure shown in

[0055] Figure 26 In the present utility model Figure 24 Schematic diagram of the H-H direction structure shown in Detailed implementation manners

[0056] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0057] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0058] It should be noted that in this text, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0059] Please refer to Figures 1-26 , and the embodiments of the present utility model will be described in detail.

[0060] Embodiment: Refer to Figures 1-3 and Figure 5 , Figure 6 As shown in

[0061] During use, the rotating shaft 1 passes through the through hole to be machined of the large component 7, and one end of the rotating shaft 1 is connected to the power output end of the machine tool;

[0062] The left large-end combined bearing seat assembly 2 is coaxially and axially slidably sleeved on the rotating shaft 1, and during use, the left large-end combined bearing seat assembly 2 is coaxially and fixedly connected to the outside of one end of the through hole to be machined on the large component 7;

[0063] The right-end combined bearing seat assembly 3 is coaxially and axially slidably sleeved on the rotating shaft 1, and during use, the right-end combined bearing seat assembly 3 is coaxially and fixedly connected to the outside of the other end of the through hole to be machined on the large component 7;

[0064] The boring tool device 4 is fixed at the middle position of the rotating shaft 1, and during use, the boring tool device 4 is placed inside the through hole to be machined on the large component 7 and is used for precision boring;

[0065] The small tool rest device 5 is fixed at the middle position of the rotating shaft 1. When in use, the small tool rest device 5 is placed inside the through hole to be machined on the large component 7 and is used for facing, deep hole grooving and precision machining of the hole step shoulder surface.

[0066] In this embodiment, in order to clearly show the structure of the double-direction bracket deep hole boring bar device, only the lower part of the structure of the large component 7 is shown in the attached drawings.

[0067] In this embodiment, a rotating shaft is connected to the power output end of the machine tool. An axial-slidable left large-end combined bearing seat assembly and a right-end combined bearing seat assembly are provided on the rotating shaft. When in use, the left large-end combined bearing seat assembly and the right-end combined bearing seat assembly are coaxially and fixedly connected to both ends of the through hole to be machined on the large component; a boring tool device and a small tool rest device are provided in the middle of the rotating shaft. When in use, both the boring tool device and the small tool rest device are placed inside the through hole to be machined on the large component; with this structure, the rotating shaft rotates with the main shaft of the machine tool, and the large component moves axially back and forth along the rotating shaft under the movement of the machine tool platform and the support of the combined bearing seat assemblies on both sides, realizing precision boring of the inner hole of the large component, as well as facing of the inner hole, deep hole grooving and precision machining of the hole step shoulder surface, effectively solving the problem of deep hole machining that cannot be achieved due to equipment constraints. The manufacturing cost of the entire bracket deep hole boring mechanism is low, the processing and maintenance cycle is short, the cutting processing dimensions are reliable, the processed deep hole size range is wide, the cutting has no vibration, is strong and powerful, supports heavy cutting with large feed rates, and has high efficiency.

[0068] In a specific implementation manner: Refer to Figures 8-13 As shown, the rotating shaft 1 is formed by coaxially connecting a feed end shaft 1-1 and an output end shaft 1-2;

[0069] The feed end shaft 1-1 includes a feed end shaft body 1-1-1, and a feed end shaft end plate 1-1-2 is coaxially and fixedly sleeved on the right end of the feed end shaft body 1-1-1;

[0070] The output end shaft 1-2 includes an output end shaft body 1-2-1, and a tool mounting frame structure for mounting the boring tool device 4 and the small tool rest device 5 is connected to the left end of the output end shaft body 1-2-1. The feed end shaft end plate 1-1-2 of the feed end shaft 1-1 is connected to the tool mounting frame structure of the output end shaft 1-2 to ensure that the feed end shaft 1-1 and the output end shaft 1-2 are coaxial.

[0071] In this embodiment, the rotating shaft is divided into a feed end shaft and an output end shaft. The feed end shaft and the output end shaft are processed separately, and the length of the shaft can be designed according to the requirements of the drawing of the depth of the hole to be machined on the workpiece, which effectively solves the actual machining difficulty of the long shaft and reduces the vibration, bending deformation and thermal deformation of the shaft during turning and grinding. Among them, the feed end shaft and the output end shaft are quenched with 45 steel to improve the hardness and wear resistance of the shaft, and the tempering treatment eliminates the internal stress generated during the quenching process and improves the toughness and fatigue performance of the shaft.

[0072] In a specific embodiment: Refer to Figures 10-13 As shown, the tool mounting frame structure of the output end shaft 1-2 is formed by connecting the middle vertical seat plate I 1-2-2 and the middle vertical seat plate II 1-2-3 arranged left and right and the two middle horizontal seat plates 1-2-4 arranged up and down. The middle vertical seat plate I 1-2-2 is coaxially and fixedly connected to the output end shaft body 1-2-1. The feed end shaft end plate 1-1-2 and the middle vertical seat plate II 1-2-3 are coaxially connected through a spigot structure and a shaft connecting bolt 1-3. The spigot structure includes a spigot boss 1-1-3 provided on the feed end shaft end plate 1-1-2 and a spigot groove 1-2-7 provided on the middle vertical seat plate II 1-2-3.

[0073] In the above structure, the connection between the feed end shaft and the output end shaft adopts a spigot positioning and bolt connection method, which effectively ensures the position accuracy and concentricity of the two ends of the axis.

[0074] In a specific embodiment: Refer to Figure 13 As shown, a measuring hole 1-2-6 is provided at one end of the output end shaft body 1-2-1 close to the tool mounting frame structure. This measuring hole is an internal micrometer measuring hole and is used to measure the feed during machining.

[0075] In a specific embodiment: Refer to Figure 2 As shown, the left large end combined bearing seat assembly 2 includes a left end combined bearing seat assembly and a tool changer 2-7. The tool changer 2-7 is a circular frame structure. When in use, the right end of the tool changer 2-7 is coaxially and fixedly connected to the outside of one end of the through hole to be machined on the large component 7 through a tool changer positioning pin 2-9 to position the center of the circle, and is coaxially fixed through a tool changer connecting bolt 2-8. The central hole of the tool changer 2-7 is sleeved on the feed end shaft 1-1 with a clearance, and the left end combined bearing seat assembly is fixedly installed at the left end of the tool changer 2-7. Among them, the positioning and connection holes of the tool changer are made according to the original holes on the large component, so that the structure of the large component does not need to be changed.

[0076] In this structure, the frame design of the tool changer is mainly for the convenience of tool change. The rotating shaft moves axially between the left end combined bearing seat assembly and the right end combined bearing seat assembly, driving the boring tool device and the small tool rest device to move into the tool changer, so as to replace the tool on it.

[0077] Refer to Figure 4 As shown, the left-end combined bearing seat assembly includes a left-end bearing seat 2-1, two left-end face bearings 2-2, a left-end roller bearing 2-3, and a left-end copper sleeve bearing 2-4. The left-end copper sleeve bearing 2-4 is sleeved on the feed-end shaft body 1-1-1. The outside of the left-end copper sleeve bearing 2-4 is supported inside the left-end bearing seat 2-1 by the left-end roller bearing 2-3 in the middle and the two left-end face bearings 2-2 on both sides. A left-end seal strip 2-5 is used to seal between the left-end bearing seat 2-1 and the feed-end shaft body 1-1-1 for dust prevention. The left side of the left-end bearing seat 2-1 is covered by a left-end bearing gland 2-6. A left-end bearing oil nozzle 2-10 is provided on the left-end bearing seat 2-1 for lubricating the left-end bearing group.

[0078] In a specific embodiment: Refer to Figure 2 As shown, the right-end combined bearing seat assembly 3 has the same and symmetrical structure as the left-end combined bearing seat assembly. The right-end combined bearing seat assembly 3 includes a right-end bearing seat 3-1, two right-end face bearings 3-2, a right-end roller bearing 3-3, and a right-end copper sleeve bearing 3-4. The right-end copper sleeve bearing 3-4 is sleeved on the output-end shaft body 1-2-1. The outside of the right-end copper sleeve bearing 3-4 is supported inside the right-end bearing seat 3-1 by the right-end roller bearing 3-3 in the middle and the two right-end face bearings 3-2 on both sides. A right-end seal strip 3-5 is used to seal between the right-end bearing seat 3-1 and the output-end shaft body 1-2-1 for dust prevention. The right end of the right-end bearing seat 3-1 is covered by a right-end bearing gland 3-6. When in use, the right-end bearing seat 3-1 is coaxially and fixedly connected to the outside of the other end of the through hole to be machined on the large component 7 through a right-end bearing seat connection bolt 3-7. A right-end bearing oil nozzle 3-8 is provided on the right-end bearing seat 3-1 for lubricating the right-end bearing group. Among them, the connection holes of the right-end bearing seat are made according to the original holes on the large component, so as not to change the structure of the large component.

[0079] In the above combined bearing seat assembly, one side of the face bearing, roller bearing, and copper sleeve bearing is installed inside the bearing seat, close to the shoulder surface, and the other side is limited by the bearing gland. The bearing gland and the bearing seat are sealed with the rotating shaft through an O-ring.

[0080] In the above embodiment, the left-end combined bearing seat assembly is combined and processed by making a bearing seat bracket or by welding according to the characteristics of the boom structural member, and is installed with a deep-boring mechanism device for the bracket by using pin positioning and bolt connection for fastening. At the same time, the right-end combined bearing seat assembly also uses pin positioning and bolt connection for fastening to install the deep-boring mechanism device for the bracket, ensuring that the left and right end bearing seats are concentric and coaxial, forming the design advantage feature of integrating the deep-boring mechanism for the bracket and the workpiece.

[0081] The roller bearings in the two end bearing seats both adopt double-row tapered thrust self-aligning roller bearings. This type of bearing has a large load-carrying capacity, can automatically adjust, has self-aligning performance, can withstand radial heavy loads and impact loads, and can also withstand a certain amount of bidirectional axial loads. Two end face bearings are installed on each side of the double-row tapered thrust self-aligning roller bearing, mainly to support the rotating shaft, reduce the friction coefficient during the shaft movement, and ensure its rotational accuracy and stability. A copper sleeve bearing with self-lubricating graphite is installed inside the inner ring of the double-row tapered thrust self-aligning roller bearing, further reducing the friction coefficient, reducing energy loss, improving the transmission efficiency, and at the same time reducing the consumption of oil products and the generation of waste oil, which is beneficial to energy conservation and emission reduction.

[0082] In a specific embodiment: Refer to Figure 2 As shown, the boring tool device 4 includes a tool block slide 4-1. The tool block slide 4-1 is fixed on the tool mounting frame structure. The center of the tool block slide 4-1 is perpendicular to and intersects with the axis of the rotating shaft 1. A fine-tuning precision boring head 4-2 is fixed on the tool block slide 4-1. Among them, the tool block slide 4-1 is made according to the size. Preferably, the tool block slide 4-1 adopts a dovetail slide connection structure. The dovetail slide is fixed on the tool mounting frame structure by screws. The dovetail groove slider is slidably connected to the dovetail slide and is fixed by screws after the position is determined. The blade seat of the fine-tuning precision boring head 4-2 is fixed on the dovetail groove slider.

[0083] In this embodiment, the tool block slide is fixed on the tool mounting frame structure of the output end shaft and is adjusted by a precision fine-tuning unit. The minimum adjustment scale is 0.005 mm, which is very convenient for adjusting and correcting the boring hole size. The blade seat and the tool tip are fastened by a three-sided tight-fitting method, greatly increasing the rigidity. Moreover, the height equalization error of the blade seat is less than 0.02 mm, greatly improving the quality of deep-hole boring workpieces.

[0084] In a specific embodiment: Refer to Figure 2 、 5 、7, the small tool rest device 5 includes a servo motor slide module 5-1 and a small tool rest 5-2. The servo motor slide module 5-1 is fixed in the middle of the tool mounting frame structure and its center line is perpendicular to and intersects with the axis of the rotating shaft 1. The small tool rest 5-2 is fixed on the servo motor slide module 5-1 through a small tool rest positioning pin 5-4 and a small tool rest fixing bolt 5-3. A processing tool 5-5 is fixedly connected to the small tool rest 5-2 through a tool fixing bolt 5-6, and different tools are selected according to the drawing requirements. A limit switch 5-7 is provided on the small tool rest 5-2 to control the front and back dimensions. Among them, the structure of the small tool rest 5-2 is as Figures 14-17 shown. In this embodiment, the small tool rest is used for deep-hole grooving and precision machining of the hole step shoulder surface. The stepping motor drives the small tool rest to feed in the Y direction, and the workbench drives the workpiece to feed in the X direction. The limit switch can accurately control the feed position of the small tool rest.

[0085] Among them, referring to Figures 23-26 As shown, the servo motor slide table module 5-1 includes a servo motor 5-1-1, a lead screw 5-1-2, and a slider 5-1-3. The servo motor 5-1-1 is fixed on the tool mounting frame structure. The lead screw 5-1-2 is rotatably supported on the tool mounting frame structure through bearings. The servo motor 5-1-1 is connected to the input end of the lead screw 5-1-2 through a belt drive. The slider 5-1-3 is screwed onto the lead screw 5-1-2. Both sides of the slider 5-1-3 are limited by baffles; as Figure 2 shown, the right end of the output shaft body 1-2-1 is fixedly connected with a rotary circuit 5-1-5 through a rotary circuit support 5-1-6. An axial through hole 1-2-5 is provided inside the output shaft body 1-2-1. The built-in wires and limit wires 5-1-4 of the rotary circuit 5-1-5 are connected to the servo motor 5-1-1 and the limit switch 5-7 through the axial through hole 1-2-5. The rotary circuit 5-1-5 is used to transmit power and limit signals and can rotate together with the boring bar. An external wire and a limit wire are connected to the rotary circuit 5-1-5 to control the internal actions. The servo motor slide table module 5-1 controls the forward and reverse rotation of the motor through power to move the lead screw forward and backward, and controls the forward and backward dimension strokes through fiber switches.

[0086] In a specific embodiment: Referring to Figure 2 shown, the left end of the feed end shaft 1-1 is connected to the machine tool power output end through a universal joint connection component 6. The universal joint connection component 6 includes a universal joint intermediate shaft 6-1. Universal joint end heads 6-3 are connected to both the left and right ends of the universal joint intermediate shaft 6-1 through cross pins 6-4. Universal joint oil filling holes 6-6 are provided at both ends of the universal joint intermediate shaft 6-1 for lubricating the movable parts of the universal joint; the universal joint end head 6-3 on the right end is connected to the left end of the feed end shaft body 1-1-1 through a feed end connection disk 6-2, and the universal joint end head 6-3 on the left end is connected to the machine tool power output end through a tool holder end connection disk 6-5. The structure of the tool holder end connection disk 6-5 is as Figures 18-22 shown, the left end is connected to the tool holder slot, and the right end is connected to the universal joint flange to transmit the spindle power to the universal joint.

[0087] In the above embodiment, the left end of the feed end shaft is connected to the machine tool power output end's horizontal head through a universal joint coupling, which can reliably transmit torque and power, has a compact structure, and high transmission efficiency.

[0088] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0089] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A boring bar device for deep hole machining based on machine tool equipment, characterized in that: It includes a rotating shaft (1), a left large-end combined bearing seat assembly (2), a right-end combined bearing seat assembly (3), a boring tool device (4), and a small tool rest device (5); the rotating shaft (1) penetrates through the through-hole to be machined of a large component (7) during use, and one end of the rotating shaft (1) is connected to the power output end of the machine tool; the left large-end combined bearing seat assembly (2) is coaxially and axially slidably sleeved on the rotating shaft (1), and the left large-end combined bearing seat assembly (2) is coaxially and fixedly connected to the outside of one end of the through-hole to be machined on the large component (7) during use; the right-end combined bearing seat assembly (3) is coaxially and axially slidably sleeved on the rotating shaft (1), and the right-end combined bearing seat assembly (3) is coaxially and fixedly connected to the outside of the other end of the through-hole to be machined on the large component (7) during use; the boring tool device (4) is fixed at the middle position of the rotating shaft (1), and the boring tool device (4) is placed inside the through-hole to be machined on the large component (7) during use and is used for fine boring; the small tool rest device (5) is fixed at the middle position of the rotating shaft (1), and the small tool rest device (5) is placed inside the through-hole to be machined on the large component (7) during use and is used for turning the end face, grooving the deep hole, and finishing the step shoulder surface of the hole.

2. The boring bar device for deep hole machining based on machine tool equipment according to claim 1, wherein: The rotating shaft (1) is formed by coaxially connecting a feed-end shaft (1-1) and an output-end shaft (1-2); The feed-end shaft (1-1) includes a feed-end shaft body (1-1-1), and a feed-end shaft end plate (1-1-2) is coaxially and fixedly sleeved on the right end of the feed-end shaft body (1-1-1); The output-end shaft (1-2) includes an output-end shaft body (1-2-1), and a tool mounting frame structure for mounting the boring tool device (4) and the small tool rest device (5) is connected to the left end of the output-end shaft body (1-2-1). The feed-end shaft end plate (1-1-2) of the feed-end shaft (1-1) is connected to the tool mounting frame structure of the output-end shaft (1-2) to ensure that the feed-end shaft (1-1) and the output-end shaft (1-2) are coaxial.

3. The boring bar device for deep hole machining based on machine tool equipment according to claim 2, characterized in that: The tool mounting frame structure of the output-end shaft (1-2) is formed by connecting a middle vertical seat plate I (1-2-2), a middle vertical seat plate II (1-2-3) arranged left and right, and two middle cross seat plates (1-2-4) arranged up and down. The middle vertical seat plate I (1-2-2) is coaxially and fixedly connected to the output-end shaft body (1-2-1). The feed-end shaft end plate (1-1-2) and the middle vertical seat plate II (1-2-3) are coaxially connected through a spigot structure and a shaft connecting bolt (1-3). The spigot structure includes a spigot boss (1-1-3) provided on the feed-end shaft end plate (1-1-2) and a spigot groove (1-2-7) provided on the middle vertical seat plate II (1-2-3).

4. The boring bar device for deep hole machining based on machine tool equipment according to claim 2, characterized in that: The left large-end combined bearing seat assembly (2) includes a left-end combined bearing seat assembly and a tool changer (2-7). The tool changer (2-7) is a circular frame structure. When in use, the right end of the tool changer (2-7) is coaxially and fixedly connected to the outside of one end of the through hole to be machined on the large component (7) through a tool changer positioning pin (2-9) and a tool changer connecting bolt (2-8). The central hole of the tool changer (2-7) is sleeved on the feed-end shaft (1-1) with a clearance. The left-end combined bearing seat assembly is coaxially and fixedly installed at the left end of the tool changer (2-7). The left-end combined bearing seat assembly includes a left-end bearing seat (2-1), two left-end face bearings (2-2), a left-end roller bearing (2-3), and a left-end copper sleeve bearing (2-4). The left-end copper sleeve bearing (2-4) is sleeved on the feed-end shaft body (1-1-1). The outside of the left-end copper sleeve bearing (2-4) is supported inside the left-end bearing seat (2-1) by the left-end roller bearing (2-3) in the middle and the two left-end face bearings (2-2) on both sides. The left-end bearing seat (2-1) is sealed with the feed-end shaft body (1-1-1) through a left-end sealing strip (2-5). The left side of the left-end bearing seat (2-1) is covered by a left-end bearing gland (2-6). The left-end bearing seat (2-1) is provided with a left-end bearing oil nozzle (2-10).

5. The boring bar device for deep hole machining based on machine tool equipment according to claim 2, characterized in that: The right-end combined bearing seat assembly (3) includes a right-end bearing seat (3-1), two right-end face bearings (3-2), a right-end roller bearing (3-3), and a right-end copper sleeve bearing (3-4). The right-end copper sleeve bearing (3-4) is sleeved on the output-end shaft body (1-2-1). The outside of the right-end copper sleeve bearing (3-4) is supported inside the right-end bearing seat (3-1) by the right-end roller bearing (3-3) in the middle and the two right-end face bearings (3-2) on both sides. The right-end bearing seat (3-1) is sealed with the output-end shaft body (1-2-1) through a right-end sealing strip (3-5). The right end of the right-end bearing seat (3-1) is covered by a right-end bearing gland (3-6). When in use, the right-end bearing seat (3-1) is coaxially and fixedly connected to the outside of the other end of the through hole to be machined on the large component (7) through a right-end bearing seat connecting bolt (3-7). The right-end bearing seat (3-1) is provided with a right-end bearing oil nozzle (3-8).

6. The boring bar device for deep hole machining based on machine tool equipment according to claim 2, wherein: The boring tool device (4) includes a tool block slide (4-1). The tool block slide (4-1) is fixed on the tool mounting frame structure. The center of the tool block slide (4-1) is perpendicular to and intersects with the axis of the rotating shaft (1). The tool block slide (4-1) adopts a dovetail slideway connection structure. A fine boring head (4-2) is fixed on the tool block slide (4-1).

7. The boring bar device for deep hole machining based on machine tool equipment according to claim 2, characterized in that: The small tool rest device (5) includes a servo motor slide module (5-1) and a small tool holder (5-2). The servo motor slide module (5-1) is fixed on the tool mounting frame structure and its center line is perpendicular to and intersects with the axis of the rotating shaft (1). The small tool holder (5-2) is fixed on the servo motor slide module (5-1) through a small tool holder positioning pin (5-4) and a small tool holder fixing bolt (5-3). A processing tool (5-5) is fixedly connected to the small tool holder (5-2) through a tool fixing bolt (5-6). A limit switch (5-7) is provided on the small tool holder (5-2).

8. The boring bar device for deep hole machining based on machine tool equipment according to claim 7, characterized in that: The servo motor slide module (5-1) includes a servo motor (5-1-1), a lead screw (5-1-2) and a slider (5-1-3). The servo motor (5-1-1) is fixed on the tool mounting frame structure. The lead screw (5-1-2) is rotatably supported on the tool mounting frame structure through bearings. The servo motor (5-1-1) is connected to the input end of the lead screw (5-1-2) through a belt drive. The slider (5-1-3) is screwed onto the lead screw (5-1-2). Both sides of the slider (5-1-3) are limited by baffles. The right end of the output shaft body (1-2-1) is fixedly connected with a rotating circuit (5-1-5) through a rotating circuit support (5-1-6). An axial through hole (1-2-5) is provided inside the output shaft body (1-2-1). The built-in wires and limit wires (5-1-4) of the rotating circuit (5-1-5) are connected to the servo motor (5-1-1) and the limit switch (5-7) through the axial through hole (1-2-5).

9. The boring bar device for deep hole machining based on machine tool equipment according to claim 2, wherein: The left end of the feed end shaft (1-1) is connected to the machine tool power output end through a universal joint connection assembly (6). The universal joint connection assembly (6) includes a universal joint intermediate shaft (6-1). Universal joint end heads (6-3) are connected to both the left and right ends of the universal joint intermediate shaft (6-1) through cross pins (6-4). Universal joint oil filling holes (6-6) are provided at both ends of the universal joint intermediate shaft (6-1). The right universal joint end head (6-3) is connected to the left end of the feed end shaft body (1-1-1) through a feed end connection disk (6-2). The left universal joint end head (6-3) is connected to the machine tool power output end through a tool shank end connection disk (6-5).

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