Inner hole grooving device

Abstract

The utility model provides an inner hole grooving device which comprises a grooving device body installed on a machine tool tailstock, the grooving device body is coaxial with a workpiece installed on a machine tool chuck, and a plurality of sliding supporting seats are arranged between the grooving device body and a machine tool sliding rail. The grooving device comprises a shell supporting assembly and an internal feeding assembly, the internal feeding assembly is located in the shell supporting assembly and slides, a cutting tool moving in the radial direction is arranged at the end of the shell supporting assembly, and a tool in the cutting tool is used for cutting the inner wall of the workpiece; the cutting tool is located at the end of the grooving fixing cylinder through a clamping groove structure and slides in the radial direction, a dovetail wedge block is fixedly arranged on the bevel edge of the right-angle driving plate, a dovetail sliding groove is formed in the bottom of the cutting tool, and the dovetail wedge block abuts against the interior of the dovetail sliding groove. According to the inner hole grooving device, through the precise design and the efficient control system, the machining precision and stability are improved, the operation and maintenance process is simplified, and the overall production efficiency and product quality are improved.

Description

Technical Field

[0001] This utility model relates to the field of machining, specifically to an internal hole grooving device. Background Technology

[0002] In the field of machining, especially in the internal machining of long shaft workpieces, it is often necessary to machine various grooves for mounting and positioning within the holes. 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 limitation: Traditional grooving tools, due to their structural design and size limitations, are difficult to adapt to the machining requirements of long shaft workpieces. The length of long shaft workpieces often exceeds the effective working range of traditional tools, making it impossible to complete the grooving operation of the entire shaft length in one go. To overcome the length limitation, it is usually necessary to groove long shaft workpieces in sections. This not only increases machining time and cost, but may also lead to cumulative errors due to multiple clamping, affecting the final machining accuracy.

[0004] Poor grooving accuracy: When grooving the inner hole of a long shaft workpiece, the tool is easily affected by vibration and offset, especially without effective support, leading to a decrease in grooving accuracy. Existing grooving tools often lack a high-precision position feedback system, 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 critical issues during the machining of the inner hole of a long shaft workpiece. Insufficient cooling or failure to remove chips in a timely manner can lead to tool overheating and a decline in the quality of the cut surface.

[0005] Operational complexity: Traditional grooving tools often require manual adjustment of tool position and feed rate, making operation complex and prone to errors. The lack of an automated feed control system means that manual intervention is needed for each grooving operation, reducing production efficiency.

[0006] Inconvenient maintenance and replacement: The tool replacement process for traditional tools is cumbersome, requiring the disassembly of multiple parts, increasing downtime and maintenance costs. Wear and tear on tools and other critical components is difficult to detect, potentially leading to equipment operation in poor condition and affecting processing quality. Utility Model Content

[0007] The main objective of this invention is to provide an internal hole grooving device to solve the problems mentioned in the background art.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: including a grooving device installed on the tailstock of a machine tool, the grooving device being coaxial with the workpiece installed on the machine tool chuck, and multiple sliding support seats being provided between the grooving device and the machine tool slide rail;

[0009] The grooving device includes a housing support assembly and an internal feed assembly. The internal feed assembly slides within the housing support assembly. The end of the housing support assembly is provided with a radially movable cutting tool. 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 connector, an extension tube and a connecting tube connected in sequence, as well as a grooving fixing cylinder. The grooving fixing cylinder is equipped with a right-angle drive plate that is driven to move axially through an internal feed assembly. The cutting tool slides radially at the end of the grooving fixing cylinder through a slot structure. A dovetail wedge is fixed on the inclined side of the right-angle drive plate. A dovetail groove is provided at the bottom of the cutting tool, and the dovetail wedge abuts against the dovetail groove.

[0011] Preferably, the internal feed assembly includes a lead screw, 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 fixedly installed at the tail end of the outer tube, and the lead screw is threadedly connected to the bottom cover through a threaded sleeve.

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

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

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

[0016] Preferably, the two ends of the grating ruler are fixedly connected to the outer tube through a grating clamp bracket. The outer tube has through grooves on both sides, and the grating clamp bracket has a locking block inside. The locking block abuts against the through groove, thereby restricting the rotation of the grating clamp bracket.

[0017] Preferably, the grooving fixing cylinder is provided with a first through hole, one end of which is fixed with a coolant nozzle, the coolant nozzle is facing the tool, and the other end is connected to the inside of the connecting pipe;

[0018] The internal feed assembly has hollow connecting rods, transmission rods, extension rods and drive rods. One side of the connecting rod is equipped with a high-pressure water pipe connector that communicates with it. The interior of the drive rod is connected to the interior of the connecting pipe through a second through hole.

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

[0020] Preferably, square grooves are provided on both sides of the central hole inside the grooving fixing cylinder, and the outer side of the right-angle drive plate slides against the square grooves;

[0021] The end of the grooving fixing cylinder is provided with a first groove, and the cutting tool moves radially against the first groove.

[0022] Preferably, the outer side of the grooving fixing cylinder is provided with multiple keyways, and a guide key block is fixed in the keyway, the guide key block abutting 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 groove is provided between the tool holder fixing seat and both sides of the sliding seat. The second groove is engaged in the first groove at the end of the grooving fixing cylinder.

[0024] The sliding seat has a dovetail groove at its tail, and the dovetail wedge abuts against the dovetail groove;

[0025] The cutting tool is fixed in the tool holder mounting base by bolts and tool holder pressure blocks.

[0026] Preferably, a fixing plate is fixedly provided at the end of the machine tool slide rail, and a motor is fixedly provided on the fixing 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 abuts against the machine tool through a bearing seat. The bottom of the machine tool tailstock is threadedly connected to the feed screw through a threaded sleeve.

[0027] This utility model provides an internal hole grooving device, which has the following advantages:

[0028] 1. By precisely aligning and coaxially maintaining the workpiece with the grooving device, the positioning accuracy of the tool during the cutting process is ensured. Position feedback is provided using a linear scale and a reading head, allowing for real-time monitoring of the tool's cutting depth and improving machining accuracy.

[0029] 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 set on the outside of the grooving fixing cylinder abuts against the inner wall of the workpiece, reducing vibration during the cutting process and ensuring cutting stability.

[0030] 3. The design of the internal feed assembly and external support structure makes installation, disassembly, and maintenance more convenient. Coolant is sprayed directly onto the cutting area through the hollow internal feed assembly, not only providing cooling but also aiding in chip removal, reducing maintenance workload. The structural design facilitates regular inspection of wear and fastener condition, ensuring long-term stable operation of the equipment.

[0031] 4. Combined with a CNC system, automated feed control can be achieved, improving production efficiency. The cutting tool is fixed in the tool holder holder by bolts and tool holder clamping blocks, facilitating quick replacement of different types of tools to adapt to various machining needs.

[0032] 5. The design of the right-angle drive plate and dovetail wedge enables radial movement of the tool, suitable for various internal grooving requirements. Through the coordination of the motor and feed screw, the feed speed and direction can be precisely controlled to adapt to different machining requirements. Attached Figure Description

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0034] Figure 1 This is a front view of the overall structure of this utility model;

[0035] Figure 2 This is a partial front sectional view of the machine tool of this utility model;

[0036] Figure 3 This is a partial sectional view of the grooving device of this utility model from the front view;

[0037] Figure 4 This is a utility model Figure 3 Enlarged view of the mid-tail section;

[0038] Figure 5 This is a utility model Figure 4 CC section view;

[0039] Figure 6 This is a utility model Figure 4 Cross-sectional view of DD in the middle;

[0040] Figure 7 This is a partial sectional view from top of the grooving device of this utility model;

[0041] Figure 8 This is a cross-sectional view of the transmission connection of the internal feed assembly of this utility model;

[0042] Figure 9 This is a side view of the grooved fixing cylinder of this utility model;

[0043] Figure 10 This is a front view of the grooved fixing cylinder of this utility model;

[0044] Figure 11 This is a utility model Figure 10 Sectional view of AA;

[0045] Figure 12 This is a top view of the right-angle drive plate of this utility model;

[0046] Figure 13 This is a side view of the cutting tool of this utility model;

[0047] Figure 14 This is a side view of the cutting tool of this utility model;

[0048] Figure 15This is a utility model Figure 10 BB section view;

[0049] In the diagram: Machine tool 1; Workpiece 2; Sliding support 3; Machine tool tailstock 4; Grooving device 5; Outer tube 501; Through groove 5011; Boring bar connector 502; Extended tube 503; Connecting tube 504; Grooving fixing cylinder 505; First slot 5051; Keyway 5052; First through hole 5053; Center hole 5054; Square groove 5055; Cutting tool 506; Sliding seat 5061; Tool holder fixing seat 5062; Tool 5063; Dovetail groove 5064; Second slot 5065; Tool holder pressure block 5066; Grating ruler component 5 07; Bottom cover 508; Lead screw 509; Rotating shaft 510; Transmission rod joint 511; Connecting rod 512; Transmission rod 513; Extension rod 515; Drive rod 516; Second through hole 5161; Right angle drive plate 517; Dovetail wedge block 5171; Indicator rod clamp bracket 518; Grating ruler 519; Reading head 520; Grating clamp bracket 521; Clamp 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 lead screw 10; Thread sleeve 11. Detailed Implementation

[0050] Example 1

[0051] like Figures 1-15 As shown, an internal hole grooving device includes a grooving device 5 installed on the tailstock 4 of a machine tool. The grooving device 5 is coaxial with the workpiece 2 installed on the machine tool chuck 9. A plurality of sliding support seats 3 are provided between the grooving device 5 and the machine tool slide rail 6.

[0052] The grooving device 5 includes a housing support assembly and an internal feed assembly. The internal feed assembly slides inside the housing support assembly. The end of the housing support assembly is provided with a radially movable cutting tool 506. The cutting tool 5063 in the cutting tool 506 is used to cut the inner wall of the workpiece 2.

[0053] The outer shell support assembly includes an outer tube 501, a boring bar connector 502, an extension tube 503, a connecting tube 504, and a grooving fixing cylinder 505 connected in sequence. The grooving fixing cylinder 505 is provided with a right-angle drive plate 517 that is driven to move axially by an internal feed assembly. The cutting tool 506 slides radially at the end of the grooving fixing cylinder 505 through a slot structure. A dovetail wedge 5171 is fixed on the inclined side of the right-angle drive plate 517. The bottom of the cutting tool 506 is provided with a dovetail slide groove 5064, and the dovetail wedge 5171 abuts against the dovetail slide groove 5064.

[0054] The cutting tool 506 moves radially on the grooving fixing cylinder 505 at the end of the housing 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 by abutting against the dovetail groove 5064 at the bottom of the cutting tool 506 through the dovetail wedge block 5171 on the inclined side, thereby pushing the cutting tool 506 to move radially, thereby cutting and grooving inside the workpiece 2.

[0055] The housing support assembly includes an outer tube 501, a boring bar connector 502, an extension tube 503, a connecting tube 504, and a grooving fixing cylinder 505. These components together form a stable structure, ensuring the entire device can be accurately positioned to the required machining location. The internal feed assembly, located within the housing support assembly, drives the right-angle drive plate 517 to move along its axial direction. This movement is fundamental to achieving radial displacement of the cutting tool. The cutting tool 506, the part directly involved in the cutting operation, has a dovetail groove 5064 at its bottom, which cooperates with the dovetail wedge 5171 on the right-angle drive plate. When the right-angle drive plate moves under the action of the internal feed assembly, it transmits force to the cutting tool through inclined contact, causing the tool to move radially outward or inward, thereby performing the cutting action.

[0056] The right-angle drive plate 517 and the dovetail wedge 5171 work together to control the radial position adjustment of the cutting tool. The right-angle drive plate moves forward or backward according to the power provided by the internal feed assembly; during the movement of the right-angle drive plate, it pushes the cutting tool to make corresponding radial movements.

[0057] Sliding support 3: Located between the grooving device and the machine tool slide rail, it provides necessary support and ensures the stability of the entire device during operation.

[0058] Preferably, the internal feed assembly includes a lead screw 509, a transmission rod joint 511, a connecting rod 512, a transmission rod 513, an extension rod 515, and a drive rod 516 connected in sequence.

[0059] A bottom cover 508 is fixedly installed at the tail of the outer tube 501, and the lead screw 509 is threadedly connected to the bottom cover 508 through a threaded sleeve.

[0060] A rotating shaft 510 is provided between the end of the lead screw 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 lead screw 509.

[0061] The end of the drive rod 516 is fixedly connected to the right-angle drive plate 517.

[0062] The rotation of the lead screw 509 can drive the transmission rod joint 511, connecting rod 512, transmission rod 513, extension rod 515, drive rod 516, and right-angle drive plate 517 to move, thereby causing the cutting tool 506 to move radially to perform cutting.

[0063] When the lead screw 509 rotates, it moves back and forth through the threaded engagement between the lead sleeve and the bottom cover 508. This movement is transmitted to the drive rod 516 via a series of connecting parts, which in turn drives the right-angle drive plate 517 and its dovetail wedge 5171. Since the dovetail wedge abuts against the dovetail groove 5064 at the bottom of the cutting tool 506, the cutting tool moves radially outward or inward as the right-angle drive plate moves, thus completing the cutting operation on the inside of the workpiece.

[0064] Preferably, a grating ruler component 507 is fixedly provided on one side of the outer tube 501. The grating ruler 519 in the grating ruler component 507 is provided with a sliding reading head 520. The reading head 520 is fixedly connected to the connecting rod 512 through the indicator rod clamp bracket 518.

[0065] A linear encoder 519 is mounted on one side of the outer tube 501 as a fixed reference point, and is engraved with fine lines or grid patterns. A reading head 520 slides along the encoder, detecting changes in the lines on the encoder via photoelectric effect to read the current position information. An indicator rod clamp bracket 518 secures the reading head 520 to the connecting rod 512, ensuring that the reading head moves accordingly when the connecting rod moves, accurately reflecting changes in the position of the internal feed assembly.

[0066] As the lead screw 509 rotates, it drives the entire internal feed assembly to move axially, causing the connecting rod 512 to move accordingly, which in turn drives the connected reading head 520. Since the reading head is in close contact with the grating ruler 519, it can capture the positional changes relative to the grating ruler in real time and convert this data into digital signals, transmitting them to the control system. In this way, the control system can accurately determine the current feed position and adjust the motor output to achieve the required machining accuracy.

[0067] Preferably, the two ends of the grating ruler 519 are fixedly connected to the outer tube 501 through the grating clamp bracket 521. The outer tube 501 has through grooves 5011 on both sides. The grating clamp bracket 521 has a locking block 5211 inside. The locking block 5211 abuts against the through groove 5011, thereby restricting the rotation of the grating clamp bracket 521.

[0068] The grating clamp bracket 521 is used to securely fix the grating ruler 519 to the outer tube 501. It provides sufficient rigidity to support the grating ruler. Locking blocks 5211 are located inside one or more protrusions of the grating clamp bracket, designed to be embedded in the through slots 5011 on both sides of the outer tube. The elongated openings in the through slots 5011 on both sides of the outer tube 501 provide positioning and locking positions for the locking blocks 5211.

[0069] Preferably, the grooving fixing cylinder 505 is provided with a first through hole 5053, one end of which is fixed with a coolant nozzle 523, the coolant nozzle 523 is facing the tool 5063, and the other end is connected to the inside of the connecting pipe 504.

[0070] The internal feed assembly has hollow interiors for connecting rod 512, transmission rod 513, extension rod 515 and drive rod 516. One side of connecting rod 512 is provided with a high-pressure water pipe connector 522 that communicates with it. The interior of drive rod 516 is connected to the interior of connecting pipe 504 through a second through hole 5161.

[0071] The coolant introduced through the high-pressure water pipe joint 522 is sprayed out from the connecting rod 512, transmission rod 513, extension rod 515, drive rod 516, second through hole 5161, connecting pipe 504 and first through hole 5053 to the coolant nozzle 523.

[0072] The coolant nozzle 523 is located at one end of the first through hole 5053 inside the grooving retainer 505 and is directly facing the cutting tool 5063. This design ensures that the coolant is sprayed directly onto the cutting area, effectively reducing the cutting temperature and thermal deformation, while also helping to flush away chips and keep the working area clean.

[0073] The connecting rod 512, transmission rod 513, extension rod 515, and drive rod 516 are all hollow, forming a continuous coolant channel. The 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.

[0074] The second through hole 5161 is provided on the drive rod 516 and is used to connect the channel between the inside of the drive rod and the connecting pipe 504, so as to ensure that the coolant can flow smoothly to the first through hole 5053.

[0075] After entering through the high-pressure water pipe joint 522, the coolant passes through the connecting rod 512, the transmission rod 513, the extension rod 515, and the drive rod 516 in sequence. Then it 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 of ​​the tool 5063.

[0076] Preferably, square grooves 5055 are provided on both sides of the central hole 5054 inside the grooving fixing cylinder 505, and the outer side of the right-angle drive plate 517 slides against the square grooves 5055.

[0077] The end of the grooving fixing cylinder 505 is provided with a first groove 5051, and the cutting tool 506 moves radially against the first groove 5051.

[0078] The center hole 5054 is located inside the grooving fixing cylinder 505, providing an axial passage for the entire device, allowing the internal feed assembly and other components to pass through. Square slots 5055 are located on both sides of the center hole 5054, providing sliding tracks for the right-angle drive plate 517. The outer side of the right-angle drive plate fits tightly with the square slots, ensuring that it can only move along a predetermined path, i.e., in the radial direction, thereby driving the cutting tool 506 to perform precise radial displacement.

[0079] The first slot 5051 is located at the end of the grooving fixing cylinder 505 and is used to support and guide the radial movement of the cutting tool 506. The cutting tool rests against this slot and can slide freely in the radial direction under the action of the dovetail wedge 5171 while maintaining correct positioning.

[0080] 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 offset, and improving machining accuracy.

[0081] The first slot 5051 provides a stable fulcrum for the cutting tool 506, ensuring that the tool will not tilt or undergo other forms of positional change during operation, which is crucial for maintaining consistent cutting quality and depth.

[0082] Preferably, the outer side of the grooving fixing cylinder 505 is provided with multiple keyways 5052, and a guide key block is fixed in the keyway 5052, which abuts against the inner wall of the workpiece 2. During 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.

[0083] When the grooving retaining cylinder 505 is inserted into the inner hole of the workpiece 2, the guide key blocks abut against the inner wall of the workpiece. This ensures that the grooving device maintains the correct center position throughout the cutting process, preventing deviation from affecting the cutting quality. The contact between the guide key blocks and the inner wall of the workpiece increases the rigidity of the entire system, helping to absorb and disperse vibrations generated during cutting. This reduces tool chatter and ensures the smoothness and dimensional accuracy of the cut surface. Through the action of multiple guide key blocks, any unintended movement of the grooving retaining cylinder 505 relative to the workpiece 2, such as rotation or radial offset, can be effectively limited, thereby further improving machining accuracy. The guide key blocks 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 greatly simplifies the alignment process.

[0084] Preferably, a tool holder fixing seat 5062 is fixedly provided on one side of the sliding seat 5061 in the cutting tool 506, and a second groove 5065 is provided between the tool holder fixing seat 5062 and the two sides of the sliding seat 5061. The second groove 5065 is locked in the first groove 5051 at the end of the grooving fixing cylinder 505.

[0085] The sliding seat 5061 has a dovetail groove 5064 at its tail, and the dovetail wedge 5171 abuts against the dovetail groove 5064.

[0086] The cutting tool 5063 is fixed in the tool holder fixing seat 5062 by bolts and tool holder pressure block 5066.

[0087] The sliding seat 5061 is the main support component for the cutting tool 506. It achieves radial movement by engaging with the dovetail wedge 5171 on the right-angle drive plate 517 via the dovetail groove 5064. The tool holder fixing seat 5062 is located on one side of the sliding seat 5061 and is used to fix the cutting tool 5063. A second slot 5065 is provided between the tool holder fixing seat and both sides of the sliding seat. This slot engages with the first slot 5051 at the end of the grooving fixing cylinder 505 to ensure that the entire tool assembly can move smoothly radially within the grooving fixing cylinder. This provides additional guiding and positioning functions to prevent the tool from shifting or rotating during movement.

[0088] The dovetail groove 5064 is located at the tail of the sliding seat 5061 and fits tightly 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 radially through the inclined surface, thereby driving the entire tool to perform cutting operations.

[0089] The cutting tool 5063 is secured to the tool holder mounting base 5062 by bolts and a tool holder clamping block 5066. This securing method is both secure and easy to disassemble, allowing for the replacement of different types of cutting tools as needed.

[0090] 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 groove 5064. The sliding seat 5061, together with the tool holder fixing seat 5062 and the tool 5063, moves radially. Due to the cooperation between the second slot 5065 and the first slot 5051, the stability and accuracy of the tool during movement are ensured. The tool 5063 cuts the inner wall of the workpiece 2, while coolant is sprayed from the coolant nozzle 523 to help cool and remove chips.

[0091] Preferably, a fixing plate 7 is fixedly provided at the end of the machine tool slide rail 6, and a motor 8 is fixedly provided on the fixing 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 is abutted against 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.

[0092] The mounting plate 7 is located at the end of the machine tool slide rail 6 and is used to mount the motor 8. The mounting plate provides stable support, ensuring that the motor does not generate unnecessary vibration or displacement during operation. The motor 8, mounted on the mounting plate 7, is the power source for the entire feed system. The motor directly drives the feed screw 10 through its output shaft, thereby causing the machine tool tailstock 4 to move along the slide rail.

[0093] The feed screw 10 is a long threaded rod, one end of which is fixedly connected to the output shaft of the motor 8, and the other end rests against the machine tool through a bearing seat. The function of the feed screw is to convert the rotational motion of the motor into linear motion, thereby pushing the machine tool tailstock 4 to move along the machine tool slide rail 6. The threaded sleeve 11 is installed at the bottom of the machine tool tailstock 4 and is threadedly connected to the feed screw 10. When the feed screw rotates, the threaded sleeve moves along the thread of the screw, thereby driving the entire machine tool tailstock 4 forward or backward along the slide rail.

[0094] When motor 8 starts and rotates, it drives feed screw 10 to rotate via output shaft. The rotation of feed screw 10 is transmitted to threaded sleeve 11 through threaded connection, causing the sleeve to move axially along the screw. Since the sleeve 11 is fixed to the bottom of machine tool tailstock 4, the entire machine tool tailstock moves along machine tool slide rail 6 as the sleeve moves. By controlling the speed and direction of the motor, the position of the machine tool tailstock can be precisely controlled, thereby achieving precise machining of workpiece 2.

[0095] Example 2

[0096] like Figures 1-15 As shown in Example 1, a method for using an internal hole grooving device is further illustrated, and the method steps are as follows:

[0097] S1. Workpiece mounting and alignment

[0098] Installing the workpiece: First, securely install the workpiece 2 to be processed onto the machine tool chuck 9.

[0099] Install the grooving device: Fix the grooving device 5 inside the machine tool tailstock 4, ensuring that it is coaxially arranged with the workpiece 2. To ensure stability, a sliding support 3 is installed in the middle of the grooving device 5 to provide additional support.

[0100] S2. Move to the cutting position

[0101] Moving grooving device: The grooving device 5 and the cutting tool 5063 are moved by the tailstock 4 of the machine tool, so that they enter the predetermined grooving position inside the workpiece 2. This process needs to be slow and smooth to avoid any unnecessary impact or vibration.

[0102] S3. Grooving

[0103] Drive the lead screw to rotate: Start the motor or manually rotate the lead screw 509. The rotation of the lead screw drives the right-angle drive plate 517 axially through the internal feed assembly.

[0104] Radial 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, thereby causing the tool 5063 to cut and groove the inner wall of the workpiece 2.

[0105] S4. Monitoring and Tool Retraction

[0106] Feedback on 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 ruler 519, providing real-time feedback on the cutting depth of the tool 5063.

[0107] Reaching the specified depth: When the reading head 520 shows that the tool has reached the predetermined cutting depth, the feed action stops.

[0108] Retract tool: Control the internal feed assembly to move in the reverse direction, so that the tool 5063 exits the inner wall of the workpiece 2, completing the grooving operation.

[0109] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. An internal hole grooving device, characterized in that: It includes a grooving device (5) installed on the tailstock (4) of the machine tool, the grooving device (5) being coaxial with the workpiece (2) installed on the machine tool chuck (9), and multiple sliding support seats (3) being provided between the grooving device (5) and the machine tool slide rail (6). The grooving device (5) includes a housing support assembly and an internal feed assembly. The internal feed assembly slides inside the housing support assembly. The end of the housing support assembly is provided with a radially movable cutting tool (506). The cutting tool (5063) in the cutting tool (506) is used to cut the inner wall of the workpiece (2). The outer shell support assembly includes an outer tube (501), a boring bar connector (502), an extension tube (503), a connecting tube (504), and a grooving fixing cylinder (505) connected in sequence. The grooving fixing cylinder (505) is provided with a right-angle drive plate (517) that is driven to move axially by an internal feed assembly. The cutting tool (506) slides radially at the end of the grooving fixing cylinder (505) through a slot structure. A dovetail wedge (5171) is fixed on the inclined side of the right-angle drive plate (517). A dovetail groove (5064) is provided at the bottom of the cutting tool (506), and the dovetail wedge (5171) abuts against the dovetail groove (5064).

2. The internal hole grooving device according to claim 1, characterized in that: The internal feed assembly includes a lead screw (509), a transmission rod joint (511), a connecting rod (512), a transmission rod (513), an extension rod (515), and a drive rod (516) connected in sequence. The outer tube (501) is fixedly provided with a bottom cover (508) at the tail end, and the lead screw (509) is threadedly connected to the bottom cover (508) through a threaded sleeve; A rotating shaft (510) is provided between the end of the lead screw (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 lead screw (509). The end of the drive rod (516) is fixedly connected to the right-angle drive plate (517).

3. The internal hole grooving device according to claim 1, characterized in that: A grating ruler component (507) is fixedly installed on one side of the outer tube (501). 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 the indicator rod clamp bracket (518).

4. The internal hole grooving device according to claim 3, characterized in that: The two ends of the grating ruler (519) are fixedly connected to the outer tube (501) through the grating clamp bracket (521). The outer tube (501) has through grooves (5011) on both sides. The grating clamp bracket (521) has a locking block (5211) inside. The locking block (5211) abuts against the through groove (5011), thereby restricting the rotation of the grating clamp bracket (521).

5. The internal hole grooving device according to claim 1, characterized in that: The grooving fixing cylinder (505) is provided with a first through hole (5053). A coolant nozzle (523) is fixed at one end of the first through hole (5053). The coolant nozzle (523) is facing the tool (5063), and the other end is connected to the inside of the connecting pipe (504). The internal feed assembly has hollow interiors for the connecting rod (512), transmission rod (513), extension rod (515) and drive rod (516). A high-pressure water pipe connector (522) is provided on one side of the connecting rod (512) and communicates with it. The interior of the drive rod (516) is connected to the interior of the connecting pipe (504) through a second through hole (5161). The coolant introduced through the high-pressure water pipe joint (522) is sprayed out from the connecting rod (512), transmission rod (513), extension rod (515), drive rod (516), second through hole (5161), connecting pipe (504) and first through hole (5053) to the coolant nozzle (523).

6. The internal hole grooving device according to claim 1, characterized in that: Square grooves (5055) are provided on both sides of the central hole (5054) inside the grooving fixing cylinder (505), and the outer side of the right angle drive plate (517) slides against the square grooves (5055); The end of the grooving fixing cylinder (505) is provided with a first groove (5051), and the cutting tool (506) moves radially against the first groove (5051).

7. The internal hole grooving device according to claim 1, characterized in that: Multiple keyways (5052) are provided on the outer side of the grooving fixing cylinder (505). Guide key blocks are fixed in the keyways (5052) and abut against the inner wall of the workpiece (2).

8. The internal hole grooving device according to claim 1, characterized in that: A tool holder fixing seat (5062) is fixed on one side of the sliding seat (5061) in the cutting tool (506). A second slot (5065) is provided between the tool holder fixing seat (5062) and the two sides of the sliding seat (5061). The second slot (5065) is locked in the first slot (5051) at the end of the grooving fixing cylinder (505). The sliding seat (5061) is provided with a dovetail groove (5064) at its tail end, and the dovetail wedge (5171) abuts against the dovetail groove (5064); The cutting tool (5063) is fixed in the tool holder fixing seat (5062) by bolts and tool holder pressure block (5066).

9. The internal hole grooving device according to claim 1, characterized in that: A fixing plate (7) is fixedly installed at the end of the machine tool slide rail (6), and a motor (8) is fixedly installed on the fixing 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 is abutted against 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).

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