Half shaft machining boring equipment

Abstract

The invention relates to the technical field of boring, in particular to boring equipment for half shaft machining. Comprising a machine tool and a three-jaw chuck with a feeding hole on the machine tool; the three-jaw chuck is driven by a machine tool to rotate; a track is horizontally arranged on the working surface of the machine tool; the track is connected with a feeding seat in a left-right sliding manner; the upper surface of the feeding base is fixedly connected with a clamping base through a lifting table. The clamping seat is leftwards connected with a cutter bar; a rod groove is formed in the lower position of the arc-shaped outer wall of the cutter rod; the left and right inner walls of the rod groove are connected with screw rods; the rod groove is movably connected with a plurality of blades; the blade is preset through the standard workpiece, the adjacent height difference is locked, during boring, only workpiece rotation and blade radial feeding are needed, frequent blade adjustment is not needed, clamping convenience and boring stability are kept, meanwhile, the multi-step hole machining requirement is met, efficiency is higher, and a high-precision hole diameter difference value scene is adapted; and the feeding period is shortened through multi-blade synchronous cutting, and batch production is adapted.

Description

Technical Field

[0001] This invention relates to the field of boring technology, specifically to a boring machine for machining half-shafts. Background Technology

[0002] In automotive transmission systems, the axle sleeve, as a core load-bearing and force-transmitting component, must stably support the rotation of the axle and accurately transmit power. Its inner wall needs to achieve high-precision fit with key components such as bearings and seals, directly determining the operational stability and service life of the transmission system. Therefore, the boring process of the inner surface is a core step in the axle sleeve production process, imposing stringent requirements on both processing efficiency and precision. Currently, the industry generally relies on traditional lathe machining processes, which have significant bottlenecks in both processing efficiency and precision control, making it difficult to adapt to the demands of modern mass production. When machining on a conventional lathe, the axle sleeve must first be clamped and fixed from the outer wall using a lathe three-jaw chuck or a special collet. Since the axle sleeve is mostly a long structure, the boring tool needs to be inserted into the inner hole from one end of the workpiece. During the machining process, two key actions need to be achieved simultaneously: driving a single insert to squeeze the inner surface for cutting and driving the insert to make feed motion along the workpiece axis. The entire machining process relies entirely on a single insert for cutting operations, resulting in a limited cutting coverage area. Furthermore, the axial feed needs to be precisely synchronized with the cutting action, which leads to a significant increase in the single feed cycle and makes it difficult to increase the number of workpieces processed per unit time.

[0003] Meanwhile, to meet assembly requirements, the inner hole of the half-shaft sleeve is often designed as a stepped hole structure with multiple segments of different inner diameters. In the traditional machining mode, for stepped segments with different hole diameters, the radial extension of the cutting tool needs to be frequently adjusted during the boring tool feed. Whenever the hole diameter changes, the axial feed movement must be paused, and the operator must manually calibrate or reset the cutting tool extension size through the equipment parameters. Only after the adjustment is completed and confirmed to be suitable for the current hole diameter can the feed be resumed for cutting. This process not only seriously interrupts the continuity of machining and adds extra debugging time costs, but more importantly, each adjustment may cause deviations in the hole diameter difference between adjacent stepped holes due to human operation errors or fluctuations in equipment parameters. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes a half-shaft machining boring equipment. This invention uses a standard workpiece to pre-adjust the cutting tool and lock the adjacent height difference. During boring, only the workpiece needs to rotate and the cutting tool needs to feed radially, without the need for frequent cutting tool adjustments. While maintaining convenient clamping and stable boring, it meets the needs of multi-step hole machining, has higher efficiency, and is suitable for high-precision hole diameter difference scenarios. Simultaneous cutting with multiple cutting tools shortens the feed cycle and is suitable for batch production.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: A half-shaft machining boring equipment of the present invention includes a machine tool and a three-jaw chuck with a loading hole on the machine tool; the three-jaw chuck is driven to rotate by the machine tool; a track is horizontally arranged on the working surface of the machine tool; a feed seat is slidably connected to the track on the left and right; a clamping seat is fixedly connected to the upper surface of the feed seat through a lifting platform; a tool holder is connected to the left side of the clamping seat; a groove is provided on the lower part of the arc-shaped outer wall of the tool holder; a screw is connected to the left and right inner walls of the groove; multiple cutting tools are movably connected to the groove; a blade groove is provided through both sides of the cutting tool; multiple cutting tools are adjacent to each other and distributed along the length direction of the groove; the screw passes through the blade grooves on all the cutting tools; the width of the blade groove is adapted to the cross-section of the screw, and the height is greater than the cross-section of the screw; a rotating groove is provided at one end of the groove near the clamping seat; a rotating sleeve is movably connected in the rotating groove; the internal thread on the inner side of the rotating sleeve is threadedly connected to the external thread of the screw; the outer cross-section of the rotating sleeve is greater than the width of the blade groove.

[0006] Preferably, a first spring is fixedly connected to the upper surface of the blade, and the upper end of the first spring abuts against the bottom wall of the groove; the spring force of the first spring is of two types, and the two types of spring force are alternately distributed along the axial direction of the blade.

[0007] Preferably, the left side of the blade is provided with multiple transverse grooves; the right side of the blade is provided with multiple longitudinal grooves; the transverse grooves are arranged perpendicularly to the longitudinal grooves.

[0008] Preferably, the rotating sleeve has an annular groove on the side near the blade; a rotating ring is rotatably connected in the annular groove.

[0009] Preferably, the tool holder has a first strip groove that runs through its upper and lower sides and communicates with the rotating groove; a first rack is slidably connected in the first strip groove; a first pressing block is fixedly connected to the upper end of the first rack; the outer wall of the rotating sleeve is provided with external teeth; the external teeth mesh with the first rack for transmission.

[0010] Preferably, the tool holder is provided with a second strip groove that communicates with the rotating groove through its upper and lower parts; the first strip groove and the second strip groove are symmetrically arranged about the rotating groove; a second rack is slidably connected in the second strip groove; a second pressing block is fixedly connected to the upper end of the second rack; the external teeth mesh with the second rack for transmission.

[0011] Preferably, the clamping base has clamping holes extending through both sides; the tool bar has a flat groove at its right end and upper position; the right end of the tool bar can be inserted into the clamping hole; the clamping hole is threaded upwards and connected to a bolt; the screw is composed of a smooth left rod and a right rod with external threads; the right rod is fixedly connected to the right end of the rod groove; the left end of the rod groove has a left hole extending through; the left rod is movably connected in the left hole; the right end of the left rod has a left square groove; the left end of the right rod has a right square block that can be inserted into the left square groove.

[0012] Preferably, the arc-shaped outer wall of the tool bar is horizontally provided with a left locking groove; the left locking groove communicates with and intersects the left hole perpendicularly; a left locking bar is movably connected in the left locking groove; the outer wall of the left bar is provided with a left slot into which the left locking bar can be inserted; and a magnet capable of magnetically attracting the left bar is embedded in the outer wall of the left locking bar.

[0013] Preferably, an L-shaped block is fixedly connected to the top of the blade; a horizontal groove is horizontally provided through the inner wall of the rod groove facing outward; a horizontal bar is slidably connected in the horizontal groove; an auxiliary groove is provided on the inner wall of the horizontal groove; an auxiliary block is slidably connected in the auxiliary groove; the side of the auxiliary block away from the L-shaped block is connected to the inner wall of the auxiliary groove by a second spring; the auxiliary block is fixedly connected to the horizontal bar; and a guide surface is provided with the horizontal bar inclined downward at the end near the L-shaped block.

[0014] Preferably, the blade has cooling grooves symmetrically arranged on its front and rear sides; the cooling grooves are elongated; the inner walls of the front and rear of the rod groove have cooling holes corresponding to the cooling grooves; the cooling holes are connected to the liquid inlet connector.

[0015] The beneficial effects of this invention are as follows: 1. This invention uses a standard workpiece to pre-adjust the cutting tool and lock the adjacent height difference. During boring, only the workpiece needs to rotate and the cutting tool needs to be fed radially. There is no need to frequently adjust the cutting tool. While maintaining convenient clamping and stable boring, it meets the needs of multi-step hole machining, which is more efficient and suitable for high-precision hole diameter difference scenarios. Simultaneous cutting of multiple cutting tools shortens the feed cycle and is suitable for mass production.

[0016] 2. This invention avoids the obstruction of movement caused by the adsorption of two adjacent blades by setting transverse and longitudinal grooves on both sides of the blade. In addition, the first spring with different elasticity provides differentiated thrust to the blade, so that two adjacent blades can independently find the position matching the inner wall of the standard workpiece, thereby improving the accuracy of blade positioning and improving the machining precision. For example, if two adjacent blades are adsorbed into one, it is difficult to apply to workpieces with different inner diameters and it is difficult to make contact with the inner wall of the workpiece.

[0017] 3. The present invention allows the first and second racks to engage with the rotating sleeve simultaneously, so that the operator only needs to press the first or second rack back and forth to unlock and lock the blade, which greatly facilitates the operation of the blade and saves more effort. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a perspective view of the clamping base and the tool holder in this invention; Figure 3 This is a perspective view of the tool holder in this invention; Figure 4 yes Figure 3 A stereoscopic view from another angle; Figure 5 yes Figure 4 Enlarged view of point A in the middle; Figure 6 yes Figure 4 Enlarged view of point B in the middle; Figure 7 This is a cross-sectional view of the tool holder in this invention; Figure 8 yes Figure 7 Enlarged view of point C in the middle; Figure 9 yes Figure 7 Sectional view at point DD; Figure 10 yes Figure 7 Sectional view at EE; Figure 11 This is a perspective view of the multiple blades of the present invention; Figure 12 yes Figure 11 Enlarged view at point F; Figure 13 This is a perspective view of the screw in this invention; Figure 14 This is a cross-sectional view of the rotating sleeve in this invention; Figure 15 This is a perspective view of a single blade in this invention.

[0020] In the diagram: Machine tool 1, three-jaw chuck 11, loading hole 12, track 13, feed seat 2, lifting platform 21, clamping seat 22, clamping hole 23, bolt 24, tool holder 3, left hole 30, bar groove 31, rotating groove 32, first strip groove 33, first rack 34, first pressing block 35, second strip groove 36, second rack 37, second pressing block 38, flat groove 39, left locking groove 391, horizontal groove 392, auxiliary groove 393. Auxiliary block 394, second spring 395, cooling hole 396, liquid inlet connector 397, screw 4, left rod 41, right rod 42, left square groove 43, right square block 44, left retaining groove 45, blade 5, blade groove 51, first spring 52, transverse groove 53, longitudinal groove 54, annular groove 55, swivel ring 56, L-shaped block 57, cooling groove 58, rotating sleeve 6, external teeth 61, left locking bar 7, magnet 71, horizontal bar 8, guide surface 81. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figures 1 to 15 As shown, the present invention includes the following embodiments: Example 1: A boring machine for machining half-shafts includes a machine tool 1 and a three-jaw chuck 11 with a loading hole 12 on the machine tool 1; the three-jaw chuck 11 is driven to rotate by the machine tool 1; a track 13 is horizontally arranged on the working surface of the machine tool 1; a feed seat 2 is slidably connected to the track 13; a clamping seat 22 is fixedly connected to the upper surface of the feed seat 2 via a lifting platform 21; a tool holder 3 is connected to the left side of the clamping seat 22; a groove 31 is provided on the lower part of the arc-shaped outer wall of the tool holder 3; screws 4 are connected to the left and right inner walls of the groove 31; the groove 3... 1. Multiple blades 5 are movably connected; blades 55 have slots 51 extending through both sides; multiple blades 5 are adjacent and distributed along the length of the rod groove 31; the screw 4 passes through all the slots 51 on the blades 5; the width of the slot 51 is adapted to the cross-section of the screw 4, and the height is greater than the cross-section of the screw 4; a rotating groove 32 is provided at one end of the rod groove 31 near the clamping seat 22; a rotating sleeve 6 is movably connected in the rotating groove 32; the internal thread on the inner side of the rotating sleeve 6 is threadedly connected to the external thread of the screw 4; the outer cross-section of the rotating sleeve 6 is greater than the width of the slot 51.

[0023] Before boring with the boring machine, first place the standard qualified half shaft (hereinafter referred to as the workpiece) into the inner side of the loading hole 12, then control the three-jaw chuck 11 to clamp the workpiece, then control the lifting table 21 to drive the clamping seat 22 to move up or down, the clamping seat 22 will drive the tool bar 3 to move up or down until the central axis of the tool bar 3 coincides with the central axis of the workpiece, then control the feed seat 2 to move to the left, the feed seat 2 will drive the lifting table 21 to move to the left, the lifting table 21 will drive the clamping seat 22 to move to the left, the clamping seat 22 will drive the tool bar 3 to move to the left, the tool bar 3 will drive the cutting tool 5 inside the tool bar 3 to move to the left. The length of the groove 31 is greater than the axial length of the workpiece, so after the tool bar 3 is inserted into the inner side of the workpiece, the rotating sleeve 6 is rotated in the opposite direction. The internal thread of the rotating sleeve 6 is threadedly connected to the external thread of the screw 4, so the rotating sleeve 6 will generate axial movement on the outer wall of the screw 4 during the rotation.

[0024] After the rotating sleeve 6 approaches the clamping base 22, it disengages from the rightmost cutting tool 5, unlocking it. The opening of the groove 31 faces vertically downwards, so multiple cutting tools 5 will contact the lower part of the workpiece's inner wall under their own weight. The cutting tool groove 51 of the cutting tool 5 will move with the screw 4. Due to the different inner diameters of the workpieces, the tip of the cutting tool 5 abuts against the inner wall of the standard workpiece, adjusting its position. Then, the rotating sleeve 6 is rotated forward. During this forward rotation, the sleeve 6 moves away from the clamping base 22 along the axis of the screw 4, abutting against the right side of the rightmost cutting tool 5, bringing adjacent cutting tools 5 into contact. Thus, after the rotating sleeve 6 rotates and presses against the rightmost cutting tool 5, all cutting tool 5 positions are locked, completing the cutting tool 5 positioning process. After the cutting tools 5 are positioned, they cannot move along the groove 31, making the boring process more stable. After positioning the height difference between adjacent cutting tools 5, the cutting tools 5 are controlled to disengage from the workpiece. The inner wall contacts the workpiece, and then the feed seat 2 is controlled to move to the right. During the rightward movement of the feed seat 2, the lifting table 21 will move to the right, and the clamping seat 22 will move to the right. During the rightward movement of the clamping seat 22, the tool holder 3 and the cutting insert 5 will be pulled out from the inside of the standard workpiece. Then the three-jaw chuck 11 is released, and the workpiece to be processed is placed into the loading hole 12 and clamped by the three-jaw chuck 11. Then the tool holder 3 is controlled to enter the inside of the workpiece to be processed. After the tool holder 3 completes the axial feed of the workpiece to be processed, the three-jaw chuck 11 is controlled to rotate. During the rotation of the three-jaw chuck 11, the workpiece to be processed will rotate. During the rotation of the workpiece to be processed, it will rotate relative to the cutting insert 5 on the inside. The lifting table 21 will drive the tool holder 3 to move down. During the downward movement of the tool holder 3, multiple cutting inserts 5 will move down. During the downward movement of multiple cutting inserts 5, they will contact the inner wall of the workpiece to be processed. During the radial feed of multiple cutting inserts 5 with the tool holder, the workpiece to be processed is quickly bored and shaped.

[0025] Existing boring methods require simultaneous axial and radial feeds, resulting in low boring efficiency. During boring, cutting fluid can be used to flush away chips and cool the insert 5. In addition, for machining two adjacent stepped holes with different inner diameters in a workpiece, the existing machining methods process them separately and sequentially, making it difficult to guarantee the difference in diameter between two adjacent stepped holes in the workpiece, resulting in poor machining accuracy. However, this invention fixes the height difference between adjacent inserts 5, that is, fixes the difference in diameter between adjacent stepped holes in the workpiece, thereby making the machined workpiece more accurate. After completing the radial overall boring, the insert 5 is directly controlled to move away from the inner wall of the workpiece, and the tool holder 3 is pulled out from the inside of the workpiece to realize the boring process of a single workpiece. Then, the three-jaw chuck 11 is released to start boring the next workpiece.

[0026] This invention uses a standard workpiece to pre-adjust the insert 5 and lock the adjacent height difference. During boring, only the workpiece needs to rotate and the insert 5 needs to be fed radially. There is no need to frequently adjust the insert 5. While maintaining convenient clamping and stable boring, it meets the needs of multi-step hole processing, which is more efficient and suitable for high-precision hole diameter difference scenarios. The synchronous cutting of multiple inserts 5 shortens the feed cycle and is suitable for mass production.

[0027] Example 2: A first spring 52 is fixedly connected to the upper surface of the blade 5. The upper end of the first spring 52 abuts against the inner bottom wall of the rod groove 31. The first spring 52 has two types of elasticity, and the first spring 52 with the two types of elasticity is alternately distributed in the axial direction of the blade shank 3.

[0028] In this embodiment, the left side of the blade 5 is provided with a plurality of transverse grooves 53; the right side of the blade 5 is provided with a plurality of longitudinal grooves 54; the transverse grooves 53 and the longitudinal grooves 54 are arranged perpendicularly.

[0029] During the reverse rotation of the rotating sleeve 6, the sleeve 6 will approach the clamping seat 22 and disengage from the rightmost blade 5, thereby unlocking the blade 5. Since the longitudinal groove 54 on one of the two adjacent blades 5 contacts the transverse groove 53 on the other blade 5, the contact position between the two adjacent blades 5 will not be sealed and will not form an adsorption. Gas can enter between the two adjacent blades 5, avoiding the adsorption between the two adjacent blades 5. This allows the two adjacent blades 5 to move independently after unlocking without affecting each other. After the blade 5 is unlocked, the first spring 52 will transmit the elastic force to the corresponding blade 5, causing the blade 5 to move away from the bottom of the rod groove 31 under the combined action of gravity and the elastic force of the first spring 52. Since the elastic forces of the two adjacent first springs 52 are different, the distances of the blades 5 away from the rod groove 31 under the action of the corresponding first spring 52 are different. With a slight drop between the two adjacent blades 5, the two adjacent blades 5 can be staggered and move independently.

[0030] Next, the tool holder 3 controls the blade 5 extending from the rod groove 31 to approach the inner wall of the qualified workpiece. When all the blades 5 are in contact with the inner wall of the qualified workpiece, the position adjustment process of the blades 5 is completed. Then, the rotating sleeve 6 is rotated in the forward direction. After the rotating sleeve 6 rotates in the forward direction, it will squeeze all the blades 5, so that all the blades 5 are squeezed. The transverse groove 53 on the two adjacent blades 5 contacts the longitudinal groove 54, increasing friction and preventing slippage, until all the blades 5 are pressed together, completing the locking of the blades 5. This invention, by setting transverse grooves 53 and longitudinal grooves 54 on both sides of the blades 5, avoids the two adjacent blades 5 from adhering and causing the movement to be obstructed. In addition, the first spring 52 with different elasticity provides differentiated thrust to the blades 5, so that the two adjacent blades 5 can independently find the position matching the inner wall of the standard workpiece, improving the positioning accuracy of the blades 5 and improving the machining accuracy. If the two adjacent blades 5 are adhering together, it is difficult to apply to workpieces with different inner diameters and difficult to make appropriate contact with the inner wall of the workpiece. This embodiment avoids such a situation.

[0031] Example 3: The rotating sleeve 6 is provided with an annular groove 55 on the side near the blade 5; a rotating ring 56 is rotatably connected in the annular groove 55.

[0032] As the rotating sleeve 6 moves away from the clamping base 22, the rotating sleeve 6 will drive the rotating ring 56 to approach and contact the blade 5. The friction between the rotating ring 56 and the blade 5 will prevent the rotating ring 56 from rotating with the rotating sleeve 6. This allows the rotating sleeve 6 to contact the blade 5 through the rotating ring 56 during rotation, which satisfies the locking requirement of the blade 5 on the one hand, and reduces the resistance of the rotating sleeve 6 to rotation on the other hand, making the rotating sleeve 6 easier to rotate.

[0033] Example 4: The tool holder 3 is provided with a first strip groove 33 that communicates with the rotating groove 32 through the top and bottom; a first rack 34 is slidably connected in the first strip groove 33; a first pressing block 35 is fixedly connected to the upper end of the first rack 34; the outer wall of the rotating sleeve 6 is provided with external teeth 61; the external teeth 61 mesh with the first rack 34 for transmission.

[0034] In this embodiment, the tool holder 3 is provided with a second strip groove 36 that communicates with the rotating groove 32 through its upper and lower parts; the first strip groove 33 and the second strip groove 36 are symmetrically arranged about the rotating groove 32; a second rack 37 is slidably connected in the second strip groove 36; a second pressing block 38 is fixedly connected to the upper end of the second rack 37; the external tooth 61 meshes with the second rack 37 for transmission.

[0035] When it is necessary to unlock the blade 5, press the first pressing block 35. After the first pressing block 35 is pressed, it will drive the first rack 34 to move down. The first rack 34 will mesh with the outer teeth 61 on the outer wall of the rotating sleeve 6. Therefore, the first rack 34 will drive the rotating sleeve 6 to rotate during its downward movement. During the rotation of the rotating sleeve 6, it will move on the outer wall of the screw 4. The rotating sleeve 6 will approach the clamping seat 22 and disengage from the blade 5, thus unlocking the blade 5. After the position adjustment of the blade 5 is completed, pull the first pressing block 35 to move up. During the upward movement of the first pressing block 35, it will drive the first rack 34 to move up. During the upward movement of the first rack 34, it will drive the rotating sleeve 6 to rotate. During the rotation of the rotating sleeve 6, it will move away from the clamping seat 22 and contact the corresponding blade 5. The blade 5 will be locked under the pressure of the rotating sleeve 6. Compared with the original method of rotating the rotating sleeve 6, this method is more labor-saving and convenient to operate.

[0036] Furthermore, the tool holder 3 is provided with a second strip groove 36 that communicates with the rotating groove 32. Thus, when it is necessary to unlock the blade 5, pressing down on the first rack 34 will cause the engaging rotating sleeve 6 to rotate. The rotating sleeve 6 will cause the second rack 37 to move upward along the second strip groove 36. The upward movement of the second rack 37 will cause the second pressing block 38 to move upward, preparing for locking the blade 5. Then, after the blade 5 is unlocked and its position adjusted, pressing down on the second pressing block 38 will cause it to move downward. During the process, the second rack 37 will move downwards, which will cause the rotating sleeve 6 to rotate. As the rotating sleeve 6 rotates, the first rack 34 will move upwards, which will cause the first pressing block 35 to move upwards, thus preparing for the unlocking of the blade 5. In this way, by having the first rack 34 and the second rack 37 engage with the rotating sleeve 6 at the same time, the operator only needs to press the first rack 34 or the second rack 37 back and forth to unlock and lock the blade 5, which greatly facilitates the operation of the blade 5 and saves more effort.

[0037] Example 5: The clamping base 22 has clamping holes 23 extending through the left and right sides; the tool bar 3 has a flat groove 39 at its right end and upper position; the right end of the tool bar 3 can be inserted into the clamping hole 23; the clamping hole 23 is threaded through and connected to a bolt 24; the screw 4 is composed of a smooth left rod 41 and a right rod 42 with external threads; the right rod 42 is fixedly connected to the right end of the rod groove 31; the left end of the rod groove 31 has a left hole 30 extending through the left side; the left rod 41 is movably connected to the left hole 30; the right end of the left rod 41 has a left square groove 43; the left end of the right rod 42 has a right square block 44 that can be inserted into the left square groove 43.

[0038] In this embodiment, a left locking groove 391 is horizontally provided through the arc-shaped outer wall of the blade 3; the left locking groove 391 communicates with and perpendicularly intersects the left hole 30; a left locking bar 7 is movably connected in the left locking groove 391; a left slot 45 is provided on the outer wall of the left rod 41, into which the left locking bar 7 can be inserted; a magnet 71 is embedded in the outer wall of the left locking bar 7, which can magnetically attract the left rod 41.

[0039] When it is necessary to disassemble the tool holder 3, tighten the bolt 24 to disengage it from the tool holder 3. Then, insert the new tool holder 3 along the clamping hole 23, ensuring the flat groove 39 faces upwards. Tighten the bolt 24 to bring it closer to the tool holder 3. The bolt 24 will then press against the inner wall of the flat groove 39, locking the tool holder 3. When it is necessary to replace the blade 5, push the left locking bar 7 out of the left locking groove 391. Initially, the end of the left locking bar 7 is aligned with the outer wall of the tool holder 3. After being manually pressed by a thin rod or other component, the left locking bar 7 is moved out of the left locking groove 391. As the left locking bar 7 is pulled out of the left locking groove 391, it will also be pulled out of the left slot 45, unlocking the left rod 41.

[0040] Then, control the left end of the left rod 41 to move left along the left hole 30. The right end of the left rod 41 will cause the left square groove 43 to disengage from the right square block 44. The left rod 41 will then be pulled out from the slot 51 inside the multiple blades 5, unlocking the blade 5 at the left end of the rod groove 31. Thus, the blade 5 at the left end of the rod groove 31 can be directly removed and replaced. For the blade 5 at the right end of the rod groove 31, simply move it to the left to remove it from the outer wall of the right rod 42. After the new blade 5 is loaded, The left rod 41 is reinserted into the multiple slots 51 along the left hole 30. The left slot 43 at the right end of the left rod 41 is inserted into the right block 44. The left slot 45 on the left rod 41 is aligned with the left locking slot 391. Then, the left locking bar 7 is inserted along the left locking slot 391. The left locking bar 7 will pass through the left slot 45 to lock the left rod 41. The magnet 71 embedded in the outer wall of the left locking bar 7 attracts the left rod 41, making it difficult for the left locking bar 7 to move out of the left locking slot 391, making the left rod 41 more stably locked.

[0041] Example 6: An L-shaped block 57 is fixedly connected to the top of the blade 5; a horizontal groove 392 is horizontally provided through the inner wall of the rod groove 31 facing outward; a horizontal bar 8 is slidably connected in the horizontal groove 392; an auxiliary groove 393 is provided in the inner wall of the horizontal groove 392; an auxiliary block 394 is slidably connected in the auxiliary groove 393; the side of the auxiliary block 394 facing away from the L-shaped block 57 is connected to the inner wall of the auxiliary groove 393 by a second spring 395; the auxiliary block 394 is fixedly connected to the horizontal bar 8; a guide surface 81 is provided with the end of the horizontal bar 8 near the L-shaped block 57 that is inclined downward.

[0042] With the workpiece length determined, control the rotating sleeve 6 to rotate away from the blade 5, first unlocking the blade 5, then pressing the blade 5 close to the bottom of the rod groove 31. The blade 5 will cause the upper end of the L-shaped block 57 to press against the guide surface 81, causing the horizontal bar 8 near the L-shaped block 57 to be pressed, which in turn causes the auxiliary block 394 to slide along the auxiliary groove 393. The auxiliary block 394 will overcome the second spring 395 and move away from the rod groove 31 until the upper end of the L-shaped block 57 passes the guide surface 81, at which point the second spring 395 will push it away. The auxiliary block 394 returns to its original position along the auxiliary groove 393. The auxiliary block 394 will drive the horizontal bar 8 to insert into the inside of the L-shaped block 57. The L-shaped block 57 has an inverted L-shaped structure and can be locked to store the inactive blades 5, so as to prevent the inactive blades 5 from extending too far and causing the tool holder 3 to enter the inside of the workpiece and interfere. When it is necessary to unlock the blades 5, simply move the horizontal bar 8 out from the inside of the L-shaped block 57 to unlock and activate the blades 5. In this way, the number of blades 5 activated on the tool holder 3 is adjustable.

[0043] Example 7: The blade 5 is provided with cooling grooves 58 symmetrically arranged on the front and rear sides; the cooling grooves 58 are elongated; the inner walls of the rod groove 31 are provided with cooling holes 396 corresponding to the cooling grooves 58; the cooling holes 396 are connected to the liquid inlet connector 397.

[0044] When the blade 5 is fully retracted into the groove 31, it is in a deactivated state. The front and rear outer walls of the blade 5 are in movable sealing contact with the front and rear inner walls of the groove 31. The cooling grooves 58 on the front and rear sides of the blade 5 are completely blocked by the groove 31, preventing the coolant from flowing out in the deactivated state. When the blade 5 extends out of the groove 31, the cooling grooves 58 on the front and rear sides of the blade 5 are exposed from the groove 31, allowing the coolant to flow out along the cooling hole 396 and the corresponding cooling groove 58, thus achieving boring cooling of the blade 5 in the activated state. The cooling hole 396 is connected to a water pump through the liquid inlet connector 397 to ensure a continuous supply of coolant. In this embodiment, the coolant cooling position changes according to the activated position of the blade 5. That is, the blade 5 is cooled in the activated state and not cooled in the deactivated state, avoiding waste of coolant.

[0045] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A boring machine for machining half-shafts, comprising a machine tool and a three-jaw chuck with a loading hole on the machine tool; the three-jaw chuck is driven to rotate by the machine tool; a track is horizontally arranged on the working surface of the machine tool; a feed seat is slidably connected to the track to the left and right; characterized in that: A clamping seat is fixedly connected to the upper surface of the feed seat via a lifting platform; a tool bar is connected to the clamping seat facing left; a bar groove is provided at the lower position of the arc-shaped outer wall of the tool bar; screws are connected to the left and right inner walls of the bar groove; multiple blades are movably connected to the bar groove; blade slots are provided through both sides of the blades; multiple blades are adjacent and distributed along the length of the bar groove; the screw passes through the blade slots on all the blades; the width of the blade slot is adapted to the cross-section of the screw, and the height is greater than the cross-section of the screw; a rotating groove is provided at one end of the bar groove near the clamping seat; a rotating sleeve is movably connected in the rotating groove; the internal thread on the inner side of the rotating sleeve is threadedly connected to the external thread of the screw; the outer cross-section of the rotating sleeve is greater than the width of the blade slot.

2. The half-shaft machining boring equipment according to claim 1, characterized in that: A first spring is fixedly connected to the upper surface of the blade, and the upper end of the first spring abuts against the bottom wall of the groove. The first spring has two types of elasticity, and the two types of elasticity are alternately distributed along the axial direction of the blade.

3. The half-shaft machining boring equipment according to claim 1, characterized in that: The left side of the blade is provided with multiple transverse grooves; the right side of the blade is provided with multiple longitudinal grooves; the transverse grooves are arranged perpendicularly to the longitudinal grooves.

4. The half-shaft machining boring equipment according to claim 1, characterized in that: The rotating sleeve has an annular groove on the side near the blade; a rotating ring is rotatably connected inside the annular groove.

5. The half-shaft machining boring equipment according to claim 1, characterized in that: The tool holder has a first strip groove that runs through it and communicates with the rotating groove. A first rack is slidably connected in the first strip groove. A first pressing block is fixedly connected to the upper end of the first rack. The outer wall of the rotating sleeve is provided with external teeth. The external teeth mesh with the first rack for transmission.

6. The half-shaft machining boring equipment according to claim 5, characterized in that: The tool holder has a second strip groove that runs through it vertically and communicates with the rotating groove; the first strip groove and the second strip groove are symmetrically arranged about the rotating groove; a second rack is slidably connected in the second strip groove; a second pressing block is fixedly connected to the upper end of the second rack; the external teeth mesh with the second rack for transmission.

7. The half-shaft machining boring equipment according to claim 1, characterized in that: The clamping base has clamping holes extending through both sides; the tool bar has a flat groove at its right end and upper position; the right end of the tool bar can be inserted into the clamping hole; the clamping hole is threaded upwards and connected to a bolt; the screw is composed of a smooth left rod and a right rod with external threads; the right rod is fixedly connected to the right end of the rod groove; the left end of the rod groove has a left hole extending through it; the left rod is movably connected to the left hole; the right end of the left rod has a left square groove; the left end of the right rod has a right square block that can be inserted into the left square groove.

8. The half-shaft machining boring equipment according to claim 7, characterized in that: The blade holder has a horizontally penetrating arc-shaped outer wall with a left locking groove; the left locking groove is connected to and perpendicularly intersects the left hole; a left locking bar is movably connected inside the left locking groove; the outer wall of the left rod has a left slot into which the left locking bar can be inserted; and a magnet capable of magnetically attracting the left rod is embedded in the outer wall of the left locking bar.

9. The half-shaft machining boring equipment according to claim 1, characterized in that: An L-shaped block is fixedly connected to the top of the blade; a horizontal groove is horizontally provided through the inner wall of the rod groove facing outward; a horizontal bar is slidably connected in the horizontal groove; an auxiliary groove is provided in the inner wall of the horizontal groove; an auxiliary block is slidably connected in the auxiliary groove; the side of the auxiliary block away from the L-shaped block is connected to the inner wall of the auxiliary groove by a second spring; the auxiliary block is fixedly connected to the horizontal bar; a guide surface is provided with the end of the horizontal bar near the L-shaped block inclined downward.

10. A half-shaft machining boring machine according to claim 9, characterized in that: The blade has symmetrical cooling grooves on its front and rear sides; the cooling grooves are elongated; the inner walls of the rod groove have cooling holes corresponding to the cooling grooves; the cooling holes are connected to the liquid inlet connector.

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