Inner hole grooving device and use method

Abstract

The present invention provides an internal hole grooving device and a method of use, comprising a grooving device mounted on a machine tool tailstock, the grooving device being coaxial with a workpiece mounted on a machine tool chuck, and a plurality of sliding support seats being provided between the grooving device and the machine tool slide rail; the grooving device comprising an outer shell support assembly and an internal feed assembly, the internal feed assembly being located within the outer shell support assembly and sliding, a radially movable cutting tool being provided at the end of the outer shell support assembly, the tool in the cutting tool being used to cut the inner wall of the workpiece; the cutting tool being located at the end of a grooving fixed cylinder and sliding radially through a slot structure, a dovetail wedge being fixed on the oblique edge of a right-angle drive plate, a dovetail slot being provided at the bottom of the cutting tool, and the dovetail wedge being resting against the dovetail slot. This internal hole grooving device, through its precise design and efficient control system, not only improves machining accuracy and stability, but also simplifies the operation and maintenance process, thereby improving overall production efficiency and product quality.

Description

Technical Field

[0001] The present invention relates to the field of machining, and in particular to an inner hole grooving device and a use method thereof. Background Art

[0002] In the field of machining, especially when machining the inner holes of long shaft workpieces, it is often necessary to create various grooves within the holes for mounting and positioning. These grooves are typically used to install seals, bearings, or other components, and require high dimensional accuracy and surface quality. However, existing grooving tools have the following problems when processing long shaft workpieces:

[0003] Length limitations: Traditional grooving tools, due to their structural design and size limitations, struggle to adapt to the machining needs of long workpieces. These workpieces often exceed the effective working range of traditional tools, making it impossible to complete the grooving of the entire shaft length in one operation. To overcome this length limitation, long workpieces typically need to be segmented for grooving. This not only increases machining time and cost but can also lead to cumulative errors from multiple clampings, compromising final machining accuracy.

[0004] Poor grooving accuracy: When grooving in the inner hole of a long-axis workpiece, the tool is susceptible to vibration and offset, especially when there is no effective support, resulting in reduced grooving accuracy. Existing grooving tools often lack high-precision position feedback systems, making it difficult for operators to monitor and adjust the cutting depth in real time, thus affecting the consistency and accuracy of the grooving. Coolant supply and chip removal are key issues in the machining of the inner hole of a long-axis workpiece. If cooling is insufficient or chips cannot be removed in time, it will cause the tool to overheat and the quality of the cut surface to deteriorate.

[0005] Operational complexity: Traditional grooving tools often require manual adjustment of tool position and feed speed, which is complex and error-prone. The lack of an automated feed control system requires manual intervention for each grooving operation, reducing production efficiency.

[0006] Inconvenient maintenance and replacement: Traditional tool replacement is a cumbersome process that requires disassembly of multiple components, increasing downtime and maintenance costs. Wear on tools and other key components is difficult to detect, which can cause the equipment to operate in an unsuitable state and affect machining quality. Summary of the Invention

[0007] The main purpose of the present invention is to provide an internal hole grooving device and a method of use to solve the problems in the above-mentioned background technology.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: comprising a grooving device mounted on the tailstock of a machine tool, the grooving device being coaxial with a workpiece mounted on a chuck of the machine tool, and a plurality of sliding support seats being provided between the grooving device and the slide rail of the machine tool;

[0009] The grooving device includes a housing support assembly and an internal feed assembly, the internal feed assembly is located and slides inside the housing support assembly, and a radially movable cutting tool is provided at the end of the housing support assembly, wherein the tool in the cutting tool is used to cut the inner wall of the workpiece;

[0010] The outer shell support assembly includes an outer tube, a boring bar joint, an extension tube and a connecting tube and a grooving fixed cylinder connected in sequence. A right-angle drive plate is provided in the grooving fixed cylinder, which is driven to move axially by an internal feed assembly. The cutting tool slides radially at the end of the grooving fixed cylinder through a slot structure. A dovetail wedge is fixed on the oblique edge of the right-angle drive plate, and a dovetail groove is provided at the bottom of the cutting tool. The dovetail wedge rests in the dovetail groove.

[0011] Preferably, the internal feed assembly includes a screw rod, a transmission rod joint, a connecting rod, a transmission rod, an extension rod and a drive rod connected in sequence;

[0012] A bottom cover is fixed to the tail of the outer tube, and the screw rod is threadedly connected to the bottom cover through a threaded sleeve;

[0013] A rotating shaft is provided between the end of the screw rod and the transmission rod joint. One end of the rotating shaft rotates in the transmission rod joint through a bearing, and the other end is fixedly connected to the screw rod.

[0014] The end of the driving rod is fixedly connected to the right-angle driving plate.

[0015] Preferably, a grating scale component is fixedly provided on one side of the outer tube, and a sliding reading head is provided on the grating scale in the grating scale component, and the reading head is fixedly connected to the connecting rod through an indicator rod clamp bracket.

[0016] Preferably, both ends of the grating scale are fixedly connected to the outer tube through a grating clamp bracket, through grooves are provided on both sides of the outer tube, and a clamping block is provided inside the grating clamp bracket, which abuts against the through groove, thereby limiting the rotation of the grating clamp bracket.

[0017] Preferably, a first through hole is provided in the grooving fixed cylinder, a coolant nozzle is fixedly provided at one end of the first through hole, the coolant nozzle faces the tool, and the other end is communicated with the interior of the connecting pipe;

[0018] The interiors of the connecting rod, transmission rod, extension rod and drive rod in the internal feed assembly are hollow, a high-pressure water pipe joint is provided on one side of the connecting rod, and the interior of the drive rod is connected to the interior of the connecting pipe via a second through hole;

[0019] The coolant introduced through the high-pressure water pipe joint is sprayed out from the connecting rod, the transmission rod, the extension rod, the driving rod, the second through hole, the connecting pipe and the first through hole to the coolant nozzle.

[0020] Preferably, square grooves are provided on both sides of the central hole in the slotted fixing cylinder, and the outer sides of the right-angle drive plate abut against and slide in the square grooves;

[0021] A first clamping groove is provided at the end of the grooving fixing cylinder, and the cutting tool abuts against the first clamping groove and moves radially.

[0022] Preferably, a plurality of key slots are provided on the outer side of the grooving fixing cylinder, and guide key blocks are fixed in the key slots, and the guide key blocks are against the inner wall of the workpiece.

[0023] Preferably, a tool holder fixing seat is fixed on one side of the sliding seat in the cutting tool, and a second clamping groove is provided between the tool holder fixing seat and both sides of the sliding seat, and the second clamping groove is clamped in the first clamping groove at the end of the groove fixing cylinder;

[0024] A dovetail slot is provided at the tail of the sliding seat, and the dovetail wedge rests in the dovetail slot;

[0025] The tool is fixed in the tool holder fixing seat by means of bolts and a tool holder pressing block.

[0026] Preferably, a fixed plate is fixedly provided at the end of the machine tool slide rail, a motor is fixedly provided on the fixed plate, a rotating feed screw is provided between the two machine tool slide rails, one end of the feed screw is fixedly connected to the output shaft of the motor, and the other end rests on the machine tool through a bearing seat, and the bottom of the machine tool tailstock is threadedly connected to the feed screw through a threaded sleeve.

[0027] A method for using an internal hole grooving device, the method steps are as follows:

[0028] S1. Install the workpiece on the machine tool chuck, fix the grooving device in the machine tool tailstock, and set up a sliding support seat in the middle of the grooving device to ensure that the workpiece and the grooving device are coaxially arranged;

[0029] S2, the grooving device and the tool are driven by the tailstock of the machine tool to move into the grooving position inside the workpiece;

[0030] S3, by driving the screw to rotate, thereby pushing the internal feed assembly and the right-angle drive plate to move axially, thereby driving the cutting tool on the right-angle drive plate to move radially, so that the tool cuts and grooves the inner wall of the workpiece;

[0031] S4. When the internal feed assembly moves as a whole, the reading head is driven to move on the grating scale through the indicator rod clamp bracket, and the tool cutting depth is fed back. After the cutting groove reaches the specified depth, the tool is retracted to complete the groove.

[0032] The present invention provides an inner hole grooving device and a method of use, with the following beneficial effects:

[0033] 1. By precisely aligning the workpiece and the grooving device and maintaining coaxiality, the tool's positioning accuracy during the cutting process is ensured. Using a grating scale and a reading head for position feedback, the tool's cutting depth is monitored in real time, improving machining accuracy.

[0034] 2. A sliding support seat is installed in the middle of the grooving device, providing additional support and enhancing the stability of the entire device. The guide key block installed on the outside of the grooving fixed cylinder rests on the inner wall of the workpiece, reducing vibration during the cutting process and ensuring cutting stability.

[0035] 3. The design of the internal feed assembly and external support structure facilitates installation, disassembly, and maintenance. Coolant is sprayed directly into the cutting area through the hollow internal feed assembly, providing cooling and chip removal, reducing maintenance workload. The structural design facilitates regular inspection of wear and fastener status, ensuring long-term stable operation of the equipment.

[0036] 4. Combined with the CNC system, it can realize automatic feed control and improve production efficiency. The tool is fixed in the tool holder holder by bolts and tool holder blocks, which is convenient for fast replacement of different types of tools to meet different processing requirements.

[0037] 5. The design of the right-angle drive plate and dovetail wedge enables radial movement of the tool, suitable for a variety of internal grooving needs. The motor and feed screw cooperate to precisely control the feed speed and direction to meet different processing requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be further described below with reference to the accompanying drawings and examples:

[0039] Figure 1 It is a front view of the overall structure of the present invention;

[0040] Figure 2 It is a partial front sectional view of the machine tool of the present invention;

[0041] Figure 3 is a partial cross-sectional view of the grooving device of the present invention from the front;

[0042] Figure 4 This invention Figure 3 Enlarged view of the mid-tail;

[0043] Figure 5 This invention Figure 4 mid-CC cross-section;

[0044] Figure 6 This invention Figure 4 Middle DD section;

[0045] Figure 7 is a partial cross-sectional view of the grooving device of the present invention from above;

[0046] Figure 8 is a sectional view of the transmission connection of the internal feed assembly of the present invention;

[0047] Figure 9This is a side view of the grooved fixed cylindrical shaft of the present invention;

[0048] Figure 10 This is a front view of the groove fixing cylinder of the present invention;

[0049] Figure 11 This invention Figure 10 Middle AA section view;

[0050] Figure 12 is a top view of the right-angle drive plate of the present invention;

[0051] Figure 13 is an axial side view of the cutting tool of the present invention;

[0052] Figure 14 is a side view of the cutting tool of the present invention;

[0053] Figure 15 This invention Figure 10 Middle BB cross-section;

[0054] Figure: Machine tool 1; workpiece 2; sliding support seat 3; machine tailstock 4; grooving device 5; outer tube 501; through slot 5011; boring bar joint 502; extension tube 503; connecting tube 504; grooving fixing cylinder 505; first slot 5051; keyway 5052; first through hole 5053; center hole 5054; square slot 5055; cutting tool 506; sliding seat 5061; tool holder fixing seat 5062; tool 5063; dovetail slot 5064; second slot 5065; tool holder pressure block 5066; grating scale component 5 07; bottom cover 508; screw 509; rotating shaft 510; transmission rod joint 511; connecting rod 512; transmission rod 513; extension rod 515; driving rod 516; second through hole 5161; right-angle driving plate 517; dovetail wedge 5171; indicator rod clamp bracket 518; grating scale 519; reading head 520; grating clamp bracket 521; clamping block 5211; high-pressure water pipe joint 522; coolant nozzle 523; machine tool slide rail 6; fixing plate 7; motor 8; machine tool chuck 9; feed screw 10; thread sleeve 11. DETAILED DESCRIPTION

[0055] Example 1

[0056] like Figures 1 to 15 As shown, an internal hole grooving device includes a grooving device 5 mounted on a machine tool tailstock 4, the grooving device 5 is coaxial with a workpiece 2 mounted on a machine tool chuck 9, and a plurality of sliding support seats 3 are provided between the grooving device 5 and the machine tool slide rail 6;

[0057] The grooving device 5 includes a housing support assembly and an internal feed assembly. The internal feed assembly is located and slides inside the housing support assembly. A radially movable cutting tool 506 is provided at the end of the housing support assembly. The tool 5063 in the cutting tool 506 is used to cut the inner wall of the workpiece 2.

[0058] The outer shell support assembly includes an outer tube 501, a boring bar joint 502, an extension tube 503, a connecting tube 504 and a grooving fixed cylinder 505 connected in sequence. The grooving fixed cylinder 505 is provided with a right-angle drive plate 517 that is driven axially by an internal feed assembly. The cutting tool 506 is located at the end of the grooving fixed cylinder 505 through a slot structure and slides radially. A dovetail wedge 5171 is fixed on the oblique edge of the right-angle drive plate 517, and a dovetail groove 5064 is provided at the bottom of the cutting tool 506. The dovetail wedge 5171 rests against the dovetail groove 5064.

[0059] The cutting tool 506 moves radially on the grooving fixed cylinder 505 at the end of the shell support assembly. The cutting tool 506 is driven by the right-angle drive plate 517 driven by the internal feed assembly. The right-angle drive plate 517 moves in the dovetail groove 5064 at the bottom of the cutting tool 506 through the dovetail wedge block 5171 on the bevel edge, thereby pushing the cutting tool 506 to move radially, thereby cutting and grooving inside the workpiece 2.

[0060] The outer shell support assembly includes an outer tube 501, a boring bar joint 502, an extension tube 503, a connecting tube 504 and a groove fixing cylinder 505. These components together form a stable structure, ensuring that the entire device can be accurately positioned at the position to be processed. The internal feed assembly is located inside the outer shell support assembly and is responsible for driving the right-angle drive plate 517 to move along the axial direction. This movement is the basis for achieving radial displacement of the cutting tool. The cutting tool 506 is the part that directly participates in the cutting operation, and its bottom is designed with a dovetail groove 5064, which is used in conjunction with the dovetail wedge 5171 on the right-angle drive plate. When the right-angle drive plate is moved by the internal feed assembly, the force is transmitted to the cutting tool through the inclined contact, causing the tool to move radially outward or inward, thereby performing the cutting action.

[0061] The right-angle drive plate 517 and dovetail wedge 5171 work together to control the radial position of the cutting tool. The right-angle drive plate advances or retreats based on the power provided by the internal feed assembly, pushing the cutting tool to make corresponding radial motion during the movement of the right-angle drive plate.

[0062] Sliding support seat 3: It is arranged between the grooving device and the machine tool slide rail, providing necessary support and ensuring the stability of the entire device during operation.

[0063] Preferably, the internal feeding assembly includes a screw rod 509, a transmission rod joint 511, a connecting rod 512, a transmission rod 513, an extension rod 515 and a driving rod 516 connected in sequence;

[0064] A bottom cover 508 is fixed to the tail of the outer tube 501, and a screw rod 509 is threadedly connected to the bottom cover 508 through a threaded sleeve;

[0065] A rotating shaft 510 is provided between the end of the screw rod 509 and the transmission rod joint 511. One end of the rotating shaft 510 is fixedly connected to the screw rod 509 and rotated in the transmission rod joint 511 through a bearing.

[0066] The end of the driving rod 516 is fixedly connected to the right-angle driving plate 517 .

[0067] The rotation of the lead screw 509 can push the transmission rod joint 511, the connecting rod 512, the transmission rod 513, the extension rod 515, the driving rod 516 and the right-angle driving plate 517 to move, thereby causing the cutting tool 506 to move radially for cutting.

[0068] As the lead screw 509 rotates, it moves forward and backward through the threaded engagement between the threaded sleeve and the bottom cover 508. This movement is transmitted to the drive rod 516 via a series of connectors, which in turn drives the right-angle drive plate 517 and its dovetail wedge 5171. Because the dovetail wedge rests within the dovetail slot 5064 at the bottom of the cutting tool 506, the movement of the right-angle drive plate causes the cutting tool to move radially outward or inward accordingly, thereby completing the cutting operation within the workpiece.

[0069] Preferably, a grating scale component 507 is fixedly provided on one side of the outer tube 501 , and a sliding reading head 520 is provided on the grating scale 519 in the grating scale component 507 , and the reading head 520 is fixedly connected to the connecting rod 512 through an indicator rod clamp bracket 518 .

[0070] A grating scale 519, engraved with fine lines or a grid pattern, is mounted on one side of the outer tube 501 and serves as a fixed reference point. A readhead 520 slides along the scale, detecting changes in the scale lines through the photoelectric effect to read the current position. An indicator rod clamp bracket 518 secures the readhead 520 to the connecting rod 512, ensuring that when the connecting rod moves, the readhead follows and accurately reflects the position changes of the internal feed assembly.

[0071] As the lead screw 509 rotates, pushing the entire internal feed assembly axially, the connecting rod 512 moves accordingly, driving the connected readhead 520. Because the readhead is in close contact with the scale 519, it can capture position changes relative to the scale in real time, converting this data into digital signals and transmitting them to the control system. This allows the control system to accurately determine the current feed position and adjust the motor output to achieve the desired machining accuracy.

[0072] Preferably, both ends of the grating scale 519 are fixedly connected to the outer tube 501 through a grating clamp bracket 521. A through groove 5011 is provided on both sides of the outer tube 501. A clamping block 5211 is provided inside the grating clamp bracket 521. The clamping block 5211 abuts against the through groove 5011, thereby limiting the rotation of the grating clamp bracket 521.

[0073] The grating clamp bracket 521 is used to securely attach the grating scale 519 to the outer tube 501. It provides sufficient rigidity to support the scale. The clamping blocks 5211 are located on one or more protrusions within the grating clamp bracket. They are designed to fit into the through slots 5011 on either side of the outer tube. These long, rectangular openings on either side of the outer tube 501 provide a location and locking mechanism for the clamping blocks 5211.

[0074] Preferably, a first through hole 5053 is provided in the groove fixing cylinder 505, and a coolant nozzle 523 is fixed at one end of the first through hole 5053, the coolant nozzle 523 faces the tool 5063, and the other end is connected to the interior of the connecting pipe 504;

[0075] The interiors of the connecting rod 512, transmission rod 513, extension rod 515, and drive rod 516 in the internal feed assembly are hollow. A high-pressure water pipe connector 522 is provided on one side of the connecting rod 512. The interior of the drive rod 516 communicates with the interior of the connecting pipe 504 via a second through hole 5161.

[0076] The coolant introduced into the high-pressure water pipe joint 522 is sprayed out from the connecting rod 512, the transmission rod 513, the extension rod 515, the drive rod 516, the second through hole 5161, the connecting pipe 504 and the first through hole 5053 to the coolant nozzle 523.

[0077] The coolant nozzle 523 is located at one end of the first through hole 5053 in the groove fixing cylinder 505 and faces the tool 5063. This design ensures that the coolant is sprayed directly into the cutting area, effectively reducing the cutting temperature and thermal deformation, while also helping to flush away chips and keep the work area clean.

[0078] The connecting rod 512, transmission rod 513, extension rod 515 and drive rod 516 are all hollow, forming a continuous coolant channel. A high-pressure water pipe connector 522 is connected to the connecting rod 512, allowing coolant to enter the entire coolant channel from an external pumping system.

[0079] The second through hole 5161 is provided on the driving rod 516 for connecting the passage between the interior of the driving rod and the connecting tube 504 , thereby ensuring that the coolant can flow smoothly to the first through hole 5053 .

[0080] After entering from the high-pressure water pipe joint 522, the coolant passes through the connecting rod 512, the transmission rod 513, the extension rod 515, the drive rod 516 in sequence, then enters the connecting pipe 504 through the second through hole 5161, and finally reaches the coolant nozzle 523 through the first through hole 5053, where it is sprayed onto the cutting area on the tool 5063.

[0081] Preferably, square grooves 5055 are provided on both sides of the central hole 5054 in the slotted fixed cylinder 505, and the outer side of the right-angle drive plate 517 abuts against and slides in the square grooves 5055;

[0082] A first clamping groove 5051 is provided at the end of the grooving fixing cylinder 505 , and the cutting tool 506 abuts against the first clamping groove 5051 and moves radially.

[0083] A central hole 5054, located within the slotted fixed cylinder 505, provides an axial passage for the entire assembly, allowing passage of the internal feed assembly and other components. Square grooves 5055, located on either side of the central hole 5054, provide sliding tracks for the right-angle drive plate 517. The outer sides of the right-angle drive plate fit tightly into the square grooves, ensuring that it can only move along a predetermined path, namely, radially, thereby driving the cutting tool 506 for precise radial displacement.

[0084] The first slot 5051 is provided at the end of the slot fixing cylinder 505 for supporting and guiding the radial movement of the cutting tool 506. The cutting tool rests on this slot and can slide freely in the radial direction under the action of the dovetail wedge 5171 while maintaining the correct positioning.

[0085] The square groove 5055 guides the right-angle drive plate 517 with a square or rectangular cross-section, ensuring that the drive plate can only move in the expected direction, reducing unnecessary shaking or deviation, and improving processing accuracy.

[0086] The first groove 5051 provides a stable fulcrum for the cutting tool 506, ensuring that the tool will not tilt or change position in other forms during operation, which is crucial for maintaining consistent cutting quality and depth.

[0087] Preferably, the outer side of the grooving fixed cylinder 505 is provided with a plurality of key slots 5052, and a guide key block is fixed in the key slot 5052, and the guide key block abuts against the inner wall of the workpiece 2. When cutting, the guide key block abuts against the inner wall of the workpiece 2 to reduce the vibration during cutting and avoid affecting the cutting accuracy.

[0088] When the grooving fixing cylinder 505 is inserted into the inner hole of the workpiece 2, the guide key block will rest against the inner wall of the workpiece. This ensures that the grooving device maintains the correct center position throughout the cutting process and prevents the cutting quality from being affected by offset. The contact between the guide key block and the inner wall of the workpiece increases the rigidity of the entire system and helps to absorb and disperse the vibrations generated during the cutting process. This reduces the vibration of the tool and ensures the smoothness and dimensional accuracy of the cutting surface. Through the action of multiple guide key blocks, any unexpected movement of the grooving fixing cylinder 505 relative to the workpiece 2, such as rotation or radial offset, can be effectively limited, thereby further improving the processing accuracy. The guide key block can also play a certain self-centering role, helping to quickly and accurately place the grooving device in the center of the inner hole of the workpiece, especially during manual operation, which can greatly simplify the alignment process.

[0089] Preferably, a tool handle fixing seat 5062 is fixed to one side of the sliding seat 5061 in the cutting tool 506, and a second clamping groove 5065 is provided between the tool handle fixing seat 5062 and both sides of the sliding seat 5061, and the second clamping groove 5065 is clamped in the first clamping groove 5051 at the end of the groove fixing cylinder 505;

[0090] A dovetail slot 5064 is provided at the rear of the sliding seat 5061, and a dovetail wedge 5171 abuts against the dovetail slot 5064;

[0091] The tool 5063 is fixed in the tool handle fixing seat 5062 by means of bolts and the tool handle pressing block 5066 .

[0092] The sliding seat 5061 is the primary support component for the cutting tool 506. It engages with the dovetail wedge 5171 on the right-angle drive plate 517 via a dovetail slot 5064, enabling radial movement. A toolholder mounting seat 5062, located on one side of the sliding seat 5061, secures the cutting tool 5063. A second retaining groove 5065 is provided between the toolholder mounting seat and the sliding seat. This retaining groove engages with the first retaining groove 5051 at the end of the slotting retaining cylinder 505, ensuring smooth radial movement of the entire tool assembly within the cylinder. This provides additional guidance and positioning, preventing the tool from drifting or rotating during movement.

[0093] The dovetail slot 5064 is located at the tail of the sliding seat 5061 and is tightly matched with the dovetail wedge 5171 on the right-angle drive plate 517. When the right-angle drive plate moves, the dovetail wedge pushes the sliding seat to move in the radial direction through the inclined surface, thereby driving the entire tool to perform cutting operations.

[0094] The cutter 5063 is fixed in the cutter handle fixing seat 5062 by bolts and the cutter handle pressing block 5066. This fixing method is both firm and convenient to disassemble, allowing different types of cutters to be replaced as needed.

[0095] When the internal feed assembly drives the right-angle drive plate 517 to move, the dovetail wedge 5171 pushes the sliding seat 5061 along the dovetail slot 5064. The sliding seat 5061, along with the tool holder 5062 and the tool 5063, moves radially. The cooperation between the second retaining groove 5065 and the first retaining groove 5051 ensures the tool's stability and accuracy during movement. As the tool 5063 cuts the inner wall of the workpiece 2, coolant is dispensed from the coolant nozzle 523 to aid cooling and chip removal.

[0096] Preferably, a fixed plate 7 is fixed at the end of the machine tool slide rail 6, and a motor 8 is fixed on the fixed plate 7. A rotating feed screw 10 is provided between the two machine tool slide rails 6. One end of the feed screw 10 is fixedly connected to the output shaft of the motor 8, and the other end rests on the machine tool through a bearing seat. The bottom of the machine tool tailstock 4 is threadedly connected to the feed screw 10 through a threaded sleeve 11.

[0097] A fixed plate 7, located at the end of the machine tool's slide rail 6, is used to mount the motor 8. This plate provides stable support, ensuring that the motor does not produce unnecessary vibration or displacement during operation. Motor 8, mounted on this plate, is the power source for the entire feed system. The motor's output shaft directly drives the feed screw 10, which in turn drives the tailstock 4 along the slide rail.

[0098] The feed screw 10 is a long, threaded rod with one end fixedly connected to the output shaft of the motor 8 and the other end resting against the machine tool via a bearing block. The feed screw converts the motor's rotational motion into linear motion, thereby moving the machine tool tailstock 4 along the machine tool slide rails 6. A threaded sleeve 11 is mounted at the bottom of the machine tool tailstock 4 and is threadedly connected to the feed screw 10. As the feed screw rotates, the sleeve moves along the thread of the screw, thereby driving the entire machine tool tailstock 4 forward or backward along the slide rails.

[0099] When the motor 8 is started and rotated, it drives the feed screw 10 to rotate via the output shaft. The rotation of the feed screw 10 is transmitted to the threaded sleeve 11 through a threaded connection, causing the threaded sleeve to move axially along the threaded sleeve. Since the threaded sleeve 11 is fixed to the bottom of the machine tool tailstock 4, as the threaded sleeve moves, the entire machine tool tailstock will also move along the machine tool slide rail 6. By controlling the speed and direction of the motor, the position of the machine tool tailstock can be accurately controlled, thereby achieving precise processing of the workpiece 2.

[0100] Example 2

[0101] like Figures 1 to 15As shown, in combination with Example 1, a method for using an inner hole grooving device is further described, and the method steps are as follows:

[0102] S1. Workpiece Installation and Alignment

[0103] Installing the workpiece: First, firmly install the workpiece 2 to be processed on the machine tool chuck 9.

[0104] Install the grooving device: The grooving device 5 is fixedly installed in the tailstock 4 of the machine tool and ensured to be coaxial with the workpiece 2. In order to ensure stability, a sliding support base 3 is set in the middle of the grooving device 5 to provide additional support.

[0105] S2. Move to cutting position

[0106] Move the grooving device: The grooving device 5 and the tool 5063 are moved by the tailstock 4 of the machine tool to the predetermined grooving position inside the workpiece 2. This process needs to be slow and steady to avoid any unnecessary shock or vibration.

[0107] S3. Cutting and grooving

[0108] Drive the screw to rotate: Start the motor or manually start the screw 509 to rotate. The rotation of the screw drives the right-angle drive plate 517 to move axially through the internal feed assembly.

[0109] Radially moving tool: As the right-angle drive plate 517 moves, the dovetail wedge 5171 abuts against the dovetail groove 5064 at the bottom of the cutting tool 506, pushing the tool 506 to move radially, so that the tool 5063 cuts and grooves the inner wall of the workpiece 2.

[0110] S4. Monitoring and retraction

[0111] Feedback of cutting depth: When the internal feed assembly moves as a whole, the indicator rod clamp bracket 518 will drive the reading head 520 to move on the grating scale 519, and provide real-time feedback on the cutting depth of the tool 5063.

[0112] Reaching the specified depth: When the reading head 520 indicates that the tool has reached the predetermined cutting depth, the feeding action is stopped.

[0113] Retract the tool: Control the internal feed assembly to move in the reverse direction, so that the tool 5063 retracts from the inner wall of the workpiece 2, completing the grooving operation.

[0114] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. In other words, equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. An internal hole grooving device, characterized by: The invention comprises a grooving device (5) mounted on a machine tool tailstock (4), the grooving device (5) being coaxial with a workpiece (2) mounted on a machine tool chuck (9), and a plurality of sliding support seats (3) being provided between the grooving device (5) and a machine tool slide rail (6); The grooving device (5) comprises a shell support assembly and an internal feed assembly, wherein the internal feed assembly is located and slides inside the shell support assembly, and a radially movable cutting tool (506) is provided at the end of the shell support assembly, wherein a tool (5063) in the cutting tool (506) is used to cut the inner wall of the workpiece (2); The housing support assembly comprises an outer tube (501), a boring bar joint (502), an extension tube (503), a connecting tube (504), and a slot fixing cylinder (505) connected in sequence. A right-angle drive plate (517) driven axially by an internal feed assembly is provided in the slot fixing cylinder (505). A cutting tool (506) is located at the end of the slot fixing cylinder (505) through a slot structure and slides radially. A dovetail wedge (5171) is fixed on the oblique edge of the right-angle drive plate (517). A dovetail chute (5064) is provided at the bottom of the cutting tool (506). The dovetail wedge (5171) abuts against the dovetail chute (5064). The internal feed assembly includes a screw rod (509), a transmission rod joint (511), a connecting rod (512), a transmission rod (513), an extension rod (515) and a driving rod (516) connected in sequence; A bottom cover (508) is fixedly provided at the tail of the outer tube (501), and the screw rod (509) is threadedly connected to the bottom cover (508) through a threaded sleeve; A rotating shaft (510) is provided between the end of the screw rod (509) and the transmission rod joint (511). One end of the rotating shaft (510) is rotated in the transmission rod joint (511) through a bearing, and the other end is fixedly connected to the screw rod (509). The end of the driving rod (516) is fixedly connected to the right-angle driving plate (517); A first through hole (5053) is provided in the groove fixing cylinder (505), a coolant nozzle (523) is fixedly provided at one end of the first through hole (5053), the coolant nozzle (523) faces the tool (5063), and the other end is communicated with the interior of the connecting pipe (504); The interiors of the connecting rod (512), the transmission rod (513), the extension rod (515), and the driving rod (516) in the internal feeding assembly are hollow. A high-pressure water pipe connector (522) is provided on one side of the connecting rod (512) and is in communication with the connecting rod. The interior of the driving rod (516) is in communication with the interior of the connecting pipe (504) via a second through hole (5161). The coolant introduced through the high-pressure water pipe joint (522) is sprayed out from the connecting rod (512), the transmission rod (513), the extension rod (515), the drive rod (516), the second through hole (5161), the connecting pipe (504) and the first through hole (5053) to the coolant nozzle (523).

2. The inner hole grooving device according to claim 1, characterized in that: A grating ruler component (507) is fixedly provided on one side of the outer tube (501), and a sliding reading head (520) is provided on the grating ruler (519) in the grating ruler component (507). The reading head (520) is fixedly connected to the connecting rod (512) through an indicator rod clamp bracket (518).

3. The inner hole grooving device according to claim 2, characterized in that: The two ends of the grating scale (519) are fixedly connected to the outer tube (501) via a grating clamp bracket (521); through grooves (5011) are provided on both sides of the outer tube (501); a clamping block (5211) is provided inside the grating clamp bracket (521); the clamping block (5211) abuts against the through groove (5011), thereby limiting the rotation of the grating clamp bracket (521).

4. The inner hole grooving device according to claim 1, characterized in that: Square grooves (5055) are provided on both sides of the center hole (5054) in the slotted fixed cylinder (505), and the outer side of the right-angle drive plate (517) abuts against and slides in the square grooves (5055); A first clamping groove (5051) is provided at the end of the grooving fixing cylinder (505), and the cutting tool (506) abuts against the first clamping groove (5051) and moves radially.

5. The inner hole grooving device according to claim 1, characterized in that: A plurality of key slots (5052) are provided on the outside of the slot fixing cylinder (505), and a guide key block is fixedly provided in the key slot (5052), and the guide key block abuts against the inner wall of the workpiece (2).

6. The inner hole grooving device according to claim 1, characterized in that: A tool handle fixing seat (5062) is fixedly provided on one side of the sliding seat (5061) in the cutting tool (506), a second clamping groove (5065) is provided between the tool handle fixing seat (5062) and both sides of the sliding seat (5061), and the second clamping groove (5065) is clamped in the first clamping groove (5051) at the end of the groove fixing cylinder (505); A dovetail slot (5064) is provided at the rear of the sliding seat (5061), and a dovetail wedge (5171) abuts against the dovetail slot (5064); The tool (5063) is fixed in the tool handle fixing seat (5062) through a bolt and a tool handle pressing block (5066).

7. The internal hole grooving device according to claim 1, characterized in that: A fixed plate (7) is fixedly provided at the end of the machine tool slide rail (6), and a motor (8) is fixedly provided on the fixed plate (7). A rotating feed screw (10) is provided between the two machine tool slide rails (6). One end of the feed screw (10) is fixedly connected to the output shaft of the motor (8), and the other end rests on the machine tool through a bearing seat. The bottom of the machine tool tailstock (4) is threadedly connected to the feed screw (10) through a threaded sleeve (11).

8. A method for using the internal hole grooving device according to any one of claims 1 to 7, wherein the method comprises the following steps: S1. The workpiece (2) is mounted on the machine tool chuck (9), the grooving device (5) is fixedly mounted in the machine tool tailstock (4), and a sliding support seat (3) is set in the middle of the grooving device (5) to ensure that the workpiece (2) and the grooving device (5) are coaxially arranged; S2, driving the grooving device (5) and the tool (5063) to move to the grooving position inside the workpiece (2) through the tailstock (4) of the machine tool; S3, by driving the screw rod (509) to rotate, thereby driving the internal feed assembly and the right-angle drive plate (517) to move axially, thereby driving the cutting tool (506) on the right-angle drive plate (517) to move radially, so that the tool (5063) cuts and grooves the inner wall of the workpiece (2); S4. When the internal feed assembly moves as a whole, the reading head (520) is driven to move on the grating ruler (519) through the indicator rod clamp bracket (518), and the cutting depth of the tool (5063) is fed back. After the groove is cut to the specified depth, the tool is retracted to complete the groove.

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