Machine tool for processing drive axle

Abstract

This invention discloses a machine tool for machining drive bridges, relating to the field of vertical CNC drilling machine technology. It includes a machine tool frame, a control panel fixedly connected to the machine tool frame, a drive module mounted on the machine tool frame, a drill bit mounted at the bottom of the drive module, a longitudinal movement module fixedly connected to the machine tool frame, a transverse movement module mounted on the longitudinal movement module, and a machining table fixedly connected to the transverse movement module. By using a restrictive stop mechanism, when the drill bit undergoes initial bending deformation due to edge cutting or workpiece misalignment, the feed limit is immediately triggered, rigidly locking the drill bit's axial downward movement and preventing complete drill bit breakage. This eliminates downtime for tool removal and replacement after tool breakage, preserves the drill bit's reusability, reduces tool wear costs, and prevents workpiece damage due to tool breakage, improving the machining pass rate and operational reliability in edge drilling conditions. It also avoids impact damage to surrounding equipment caused by tool breakage, enhancing the safety of the drill bit during drive bridge drilling.

Description

Technical Field

[0001] This invention relates to the field of vertical CNC drilling machine technology, and more specifically, to a machine tool for machining drive axles. Background Technology

[0002] Vertical CNC drilling machines are the core equipment for machining holes in chassis components such as drive axle housings and axle housing flanges. Currently, drive axle drilling mostly adopts a process of longitudinal and transverse table movement combined with vertical spindle drilling: the workpiece is clamped on the machining table by positioning pins, and the CNC system controls the drive module to drive the drill bit to rotate and descend to complete the cutting. The station is adjusted by a planar multi-directional drive device to achieve continuous machining of multiple holes.

[0003] For certain edge holes on drive axle components, during drilling, if the workpiece is misaligned, the drill bit will be in an asymmetrical cutting state, resulting in radial force imbalance and combined bending and torsional stress. This can cause tool failure and workpiece breakage, and may also cause the broken drill bit to fly off. A broken drill bit flying off can easily impact surrounding equipment, threatening operational safety. Removing the broken drill bit and replacing it also significantly reduces production time. In standby mode, the drill bit's cutting edge is exposed, making it susceptible to damage from impacts with hard objects during workpiece loading / unloading and table cleaning. Operators may accidentally touch the drill tip and be scratched. Adding a protective cover increases equipment costs and makes tool changing more cumbersome. In some through-hole drilling, to ensure uniform cutting, the drill bit needs to continue descending after penetrating the component. This continued descent can easily collide with the worktable, causing damage. Furthermore, different workpiece sizes usually require resetting the drilling endpoint, reducing the efficiency of drilling drive axle components. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a machine tool for machining drive axles.

[0005] The technical solution is as follows: A machine tool for machining drive bridges includes a machine tool frame, a control panel fixedly connected to the machine tool frame, a drive module disposed on the machine tool frame, a drill bit disposed at the bottom of the drive module, a longitudinal traverse module fixedly connected to the machine tool frame, a transverse traverse module disposed on the longitudinal traverse module, a machining table fixedly connected to the transverse traverse module, and a protective component disposed on the drive module for protecting and limiting the drilling of the drill bit. The protective assembly includes two fixed seats that are bolted to both sides of the drive module. Each fixed seat has a limit groove arranged in a linear array inside. The two fixed seats are slidably connected to a limit frame inside. The processing table is equipped with a support assembly for supporting the drive axle components and can be adjusted according to the thickness of the drive axle components. The support assembly includes a mounting base fixedly connected inside the processing table. A base plate is slidably connected inside the mounting base. Slotted plates are fixedly connected to the four corners of the upper surface of the base plate. Sliding strips are slidably connected to the inner sides of the four slotted plates. A pad is fixedly connected to the top of the four sliding strips.

[0006] Furthermore, a device for vertical driving is provided between the drive module and the machine tool frame. The drive module consists of a housing, a motor, and a chuck. The drill bit is clamped and connected by the chuck of the drive module. The machining table is equipped with positioning pins for positioning drive axle components.

[0007] Furthermore, the protective assembly also includes two limiting blocks, which are laterally slidably connected to both ends of the limiting frame located inside the two fixed seats. The bottom of the limiting frame is fixedly connected to two rotating seats, each of which is rotatably connected to a trigger plate. Each trigger plate has two insertion holes. A pressing rod is rotatably connected to the limiting frame. A swing frame is rotatably connected to each of the two rotating seats. A torsion spring is provided at the rotatable connection between each swing frame and the rotating seat. An abutment rod is fixedly connected to each of the two swing frames by bolts. A movable rod is slidably connected to each of the two swing frames. The top ends of the two movable rods are rotatably connected to the two limiting blocks respectively.

[0008] Furthermore, the limit frame is V-shaped, with a ring at the bottom. The ring is fitted around the outside of the drill bit, and a pressure sensor is located at the bottom of the ring. The shape of the limit block near the limit groove matches the shape of the limit groove. The trigger plate is made of tungsten carbide hard alloy. The pressure rod consists of a frame and two long rods. The two long rods of the pressure rod correspond to the positions of two adjacent insertion holes and are inserted into them.

[0009] Furthermore, the support assembly also includes three slots at one end of the pad frame, and three blocks are fixedly connected to the other end of the pad frame.

[0010] Furthermore, the support assembly also includes two fixed blocks fixedly connected to both ends of the upper surface of the base plate. A bidirectional threaded rod is rotatably connected to both fixed blocks. One end of the bidirectional threaded rod has a guide groove. A spring is fixedly connected inside the guide groove. A guide rod is fixedly connected to the end of the spring away from the guide groove. The guide rod is slidably connected inside the guide groove. A gear frame is fixedly connected to the end of the guide rod away from the spring. A toothed ring is fixedly connected to a fixed block near the gear frame. Two movable rings are threadedly connected to the outer side of the bidirectional threaded rod. A support rod is rotatably connected to the top of each of the two movable rings. The top ends of the two support rods are rotatably connected to the bottom ends of the pad frame, respectively.

[0011] Furthermore, the mounting base has multiple T-shaped grooves, and the bottom of the base plate is fixedly connected to multiple T-shaped strips. The base plate slides in the T-shaped grooves of the mounting base through the T-shaped strips.

[0012] Furthermore, the guide rod can only slide laterally inside the guide groove, the side of the gear frame near the guide rod abuts and engages with the gear ring, and the side of the gear frame away from the gear ring is provided with a handle.

[0013] Based on the above, the beneficial effects of the machine tool for processing drive axles according to the present invention are as follows: The limited positioner can immediately trigger the feed limit when the drill bit undergoes initial bending deformation due to edge cutting or workpiece misalignment. This rigidly locks the drill bit to stop its axial downward movement, preventing complete breakage. This saves downtime for tool removal and replacement after tool breakage, preserves the drill bit's reusability, reduces tool wear costs, and prevents workpiece damage from tool breakage, thus improving the processing pass rate and operational reliability of edge drilling. It also prevents impact damage to surrounding equipment caused by tool breakage, enhancing the safety of the drill bit during drive bridge drilling. The limit bracket can protect the drill bit, preventing hard objects from hitting the drill bit cutting edge when loading and unloading workpieces or cleaning the machining table, protecting the precision cutting edge from external damage, and extending the drill bit's standby life; at the same time, it isolates the operator from direct contact with the sharp drill bit, reducing the risk of accidental scratches, and preventing surrounding chips and debris from falling and scraping the cutting edge. There is no need to add an additional protective cover. The limit bracket has the dual effect of operational safety and tool maintenance. The support frame can support the drive axle components, preventing them from approaching the surface of the machining table and creating an independent drilling clearance space. When the drill bit drills through the drive axle components, it can prevent the drill bit from continuing to move downwards and contacting the machining table, thus preventing damage to the machining table and saving the maintenance cost of frequent repair and grinding of the table surface. At the same time, the bottom support frame structure facilitates the smooth discharge of chips, preventing chips from being stuck on the surface of the machining table. It takes into account both the protection of the worktable and the quality of workpiece processing, and improves the consistency of clamping and positioning and the efficiency of operation. By adjusting the height of the support frame, components requiring different heights can be supported, compensating for the drill bit's downward allowance needed to drill through different specifications of drive axle components. This eliminates the need to program and calculate the downward distance for each workpiece separately, simplifying CNC programming. During model changeovers, the support frame does not need to be replaced; the height of the support frame can be quickly adjusted to adapt to the new workpiece, shortening model changeover and debugging time. At the same time, it always ensures reasonable drilling clearance, taking into account both worktable protection and drill bit backlash control, thus improving the adaptability and production efficiency of drilling for various types of drive axle components. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the overall components of the present invention; Figure 2 This is a three-dimensional schematic diagram of the drive module, drill bit, limit frame, and other components of the present invention; Figure 3 This is a three-dimensional schematic diagram of the components of the present invention, such as the fixing seat, the limiting groove, and the limiting block; Figure 4 This is a three-dimensional cross-sectional view of the drive module, fixing base, limiting frame, and other components of the present invention; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of component A in the middle; Figure 6 This is a three-dimensional schematic diagram of the trigger plate, pressure rod, swing frame, and other components of the present invention; Figure 7 This is a three-dimensional schematic diagram of the components such as the pressure rod and the contact rod of the present invention; Figure 8 This is a three-dimensional schematic diagram of the processing table, mounting base, base plate, and support frame of the present invention. Figure 9 This is a three-dimensional schematic diagram of the components of the present invention, including the base plate, groove plate, slide bar, and pad frame. Figure 10 This is a three-dimensional schematic diagram of the components of the present invention, including the bidirectional threaded rod, the movable ring, the support rod, and the pad frame. Figure 11 For the present invention Figure 10 Enlarged schematic diagram of component at point B; Figure 12 This is a three-dimensional schematic diagram of the pad frame, card slot, card block and other components of the present invention.

[0015] The reference numerals in the accompanying drawings of this invention are as follows: 1. Machine tool frame; 2. Control panel; 3. Drive module; 4. Drill bit; 6. Longitudinal traverse module; 7. Transverse traverse module; 8. Machining table; 51. Fixed seat; 52. Limiting groove; 53. Limiting frame; 54. Limiting block; 55. Rotating seat; 56. Trigger plate; 57. Insertion hole; 58. Pressing rod; 59. Swing frame; 510. Torsion spring; 511. Abutting rod; 512. Movable rod; 91. Mounting base; 92. Base plate; 93. Slot plate; 94. Sliding bar; 95. Pad bracket; 96. Slot; 97. Locking block; 98. Fixing block; 99. Double-sided threaded rod; 910. Guide groove; 911. Spring; 912. Guide rod; 913. Gear frame; 914. Gear ring; 915. Moving ring; 916. Support rod. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0017] The embodiments provided by the present invention will be described in detail below: like Figures 1 to 7 As shown, a machine tool for machining drive bridges includes a machine tool frame 1, a control panel 2 fixedly connected to the machine tool frame 1, a drive module 3 disposed on the machine tool frame 1, a drill bit 4 disposed at the bottom of the drive module 3, a longitudinal traverse module 6 fixedly connected to the machine tool frame 1, a transverse traverse module 7 disposed on the longitudinal traverse module 6, a machining table 8 fixedly connected to the transverse traverse module 7, and a protective component for protecting and limiting the downward drilling of the drill bit 4 disposed on the drive module 3.

[0018] It should be noted that a vertical driving device is provided between the drive module 3 and the machine tool frame 1, enabling the drive module 3 to move up and down on the machine tool frame 1. The drive module 3 consists of a housing, a motor, and a chuck. The drill bit 4 is clamped and connected by the chuck of the drive module 3. The machining table 8 is equipped with a positioning pin for positioning the drive axle components. The above are the structures of existing machine tools, and will not be described in detail later.

[0019] The protective assembly includes two fixed seats 51 bolted to both sides of the drive module 3. Each fixed seat 51 has a limiting groove 52 arranged in a linear array inside. A limiting frame 53 is slidably connected inside the two fixed seats 51. Limiting blocks 54 are slidably connected to both ends of the limiting frame 53 inside the fixed seat 51. Two rotating seats 55 are fixedly connected to the bottom of the limiting frame 53. Trigger plates 56 are rotatably connected to each of the two rotating seats 55. Two insertion holes 57 are opened on each of the two trigger plates 56. A pressing rod 58 is rotatably connected to the limiting frame 53. A swing frame 59 is rotatably connected to each of the two rotating seats 55. A torsion spring 510 is provided at the rotatable connection between each swing frame 59 and the rotating seat 55. A contact rod 511 is bolted to each of the two swing frames 59. A movable rod 512 is slidably connected to the upper end of each of the two swing frames 59. The top ends of the two movable rods 512 are rotatably connected to the two limiting blocks 54 respectively.

[0020] It should be noted that the limiting bracket 53 is V-shaped, with a ring at its bottom. The ring of the limiting bracket 53 is fitted around the outside of the drill bit 4, but it does not directly contact the drill bit 4. A gap exists between the ring of the limiting bracket 53 and the outer surface of the drill bit 4. The ring of the limiting bracket 53 has a hollow design to facilitate chip removal during the machining of the drive axle components by the drill bit 4. The inner diameter of the ring of the limiting bracket 53 is larger than the maximum rotational envelope diameter of the drill bit 4. Only when the drill bit 4 undergoes bending deformation exceeding the allowable range of normal machining will the sidewall of the drill bit 4 contact the trigger plate 56. Normal vibrations generated when the drill bit 4 contacts and processes the drive axle components will not touch the limit frame 53. A pressure sensor is installed at the bottom of the ring of the limit frame 53 to detect the contact state between the limit frame 53 and the workpiece. The shape of the end of the limit block 54 near the limit groove 52 is adapted to the shape of the limit groove 52. The trigger plate 56 is made of tungsten carbide hard alloy to prevent the trigger plate 56 from being cut and damaged by the drill bit 4 when it contacts the trigger plate 56. The pressure rod 58 consists of a frame and two long rods. The two long rods of the pressure rod 58 correspond to the positions of the two adjacent insertion holes 57 and are inserted into them.

[0021] When not in use: The operator can rotate the lowering rod 58 to rotate the long rod downwards to the position corresponding to the insertion hole 57. When the long rod of the lowering rod 58 has not contacted the abutment rod 511, the torsion spring 510 is in a natural state without torsional deformation. Then, the trigger plate 56 is rotated upwards so that the long rod of the lowering rod 58 can be inserted into and abut against the inside of the insertion hole 57. As the lowering rod 58 rotates downwards, its long rod will push against the abutment rod 511, causing the abutment rod 511 to drive the swing frame 59 to rotate downwards around the axis of rotational connection with the rotating seat 55. After the swing frame 59 rotates, the torsion spring 510 elastically tightens. Under the abutment and restriction effect of the insertion hole 57 on the lowering rod 58, the lowering rod 58 always maintains the state of pushing against the abutment rod 511. At this time, the trigger plate 56, the lowering rod 58, the swing frame 59, and the abutment rod 511 are in a state of... Figure 6 and Figure 7 In the state shown, the swing frame 59 will drive the limiting block 54 to move outward at the top of the limiting frame 53 via the movable rod 512, that is, the limiting block 54 is not engaged with the limiting groove 52.

[0022] Specifically, when drilling drive axle components, the drive axle components to be processed are placed inside the processing table 8. The control panel 2 controls the vertical drive device between the machine tool frame 1 and the drive module 3, causing the drive module 3 to move downward on the machine tool frame 1. The chuck of the drive module 3 drives the drill bit 4 to move downward synchronously. Under the drive of the motor of the drive module 3, the drill bit 4 is rotated through the chuck. When the drill bit 4 contacts the drive axle component, it can drill the drive axle component. When drilling is required at other positions of the drive axle component, the longitudinal movement module 6 and the transverse movement module 7 can be controlled by the control panel 2 to make the processing table 8 move in multiple directions in the horizontal direction. In this way, the processing table 8 can drive the drive axle component to move synchronously, thereby allowing the drill bit 4 to drill at different positions of the drive axle component.

[0023] However, the drilling position of the drive axle component is located at the edge of the component. If the drive axle component is misaligned when it is fixed in the machining table 8, the drill bit 4 will be subjected to uneven force during the machining process. That is, the drill bit 4 will be in an asymmetrical rotating cutting state, which will cause the radial force of the drill bit 4 to be unbalanced. As the drill bit 4 continues to drill downward, the two stresses will exceed the material strength limit of the drill bit 4 and it will break. Especially for small diameter drill bits 4, it is very easy to break completely. The broken drill bit 4 is prone to flying out and causing impact damage to surrounding equipment. If there are workers nearby, it will cause injury to the workers and create a safety hazard. In response, when drill bit 4 is processing normally, drive module 3 will drive drill bit 4 to first contact drive axle components. When drive module 3 drives drill bit 4 to drill downwards, it will drill a hole in drive axle components. At this time, the downward movement of drive module 3 will cause fixed seat 51 to drive limit frame 53 to move downwards synchronously. When the bottom of limit frame 53 contacts the surface of drive axle components, limit frame 53 will stop moving downwards. When drive module 3 continues to move downwards, it will drive fixed seat 51 to move downwards on the outer surface of limit frame 53. However, if the drill bit 4 experiences uneven stress due to positional deviation of drive axle components, drill bit 4 will bend and contact and push trigger plate 56, causing trigger plate 56 to rotate downwards around the axis of rotational connection with rotating seat 55. After trigger plate 56 rotates, the long rod of lower pressure rod 58 cannot be effectively inserted into the insertion hole 57. Under the elastic reset action of torsion spring 510, torsion spring 510 causes swing frame 59 to rotate upwards. Swing frame 59 will move downwards through movable rod 51 2. The limiting block 54 moves from the top of the limiting frame 53 towards the side closer to the limiting groove 52. When the limiting block 54 engages with the limiting groove 52, the limiting block 54 prevents the limiting frame 53 from sliding inside the fixed seat 51. Consequently, when the drive module 3 moves downward, it can no longer drive the fixed seat 51 to move downward on the outer surface of the limiting frame 53. That is, the drive module 3 cannot move downward at this time. The inability of the drive module 3 to move downward prevents the drill bit 4 from moving downward. This is achieved by limiting the movement of the limiting block. When the drill bit 4 undergoes initial bending deformation due to edge cutting or workpiece misalignment, the frame 53 can immediately trigger the feed limit switch, rigidly locking the drill bit 4 to move axially downward, thus preventing the drill bit 4 from breaking completely. This saves downtime for tool removal and replacement after tool breakage, preserves the reusability of the drill bit 4, reduces tool wear costs, and prevents scrapping caused by workpiece breakage. It also improves the processing pass rate and operational reliability of edge drilling, avoids impact damage to surrounding equipment caused by tool breakage, and enhances the safety of the drill bit 4 during drive axle drilling.

[0024] It should be noted that when the limiting frame 53 is restricted and cannot move further, if the vertical drive device still drives the drive module 3 to move downward, the drive module 3 will press down on the limiting frame 53 through the limiting groove 52 on the fixed seat 51 in conjunction with the limiting block 54. This causes the pressure sensor at the bottom of the limiting frame 53 to be subjected to pressure. The signal output terminal of the pressure sensor is electrically connected to the signal input terminal of the controller inside the control panel 2. The control output terminal of the controller inside the control panel 2 is electrically connected to the drive control terminal of the vertical drive device and the motor in the drive module 3, respectively. When the pressure detected by the pressure sensor reaches the set threshold, the pressure sensor outputs a detection signal to the control panel 2. The control panel 2 controls the vertical drive device to stop continuing to feed downward based on the detection signal and controls the motor in the drive module 3 to stop driving the drill bit 4 to rotate. This achieves both instantaneous mechanical restriction of the drill bit 4 and the ability to suspend the drilling operation of the drill bit 4 through electrical control.

[0025] When the malfunction of drill bit 4 is resolved and processing needs to be resumed, the operator first uses control panel 2 to control the vertical drive device to move drive module 3 upward, causing fixed seat 51 to move upward with drive module 3, thereby releasing the clamping state between limit bracket 53 and drive axle components; then the operator manually rotates trigger plate 56 upward to reset it, and rotates down pressure rod 58, so that the two long rods of down pressure rod 58 are reinserted into the corresponding insertion holes 57 of trigger plate 56, while down pressure rod 58 pushes against contact rod 511, causing contact rod 511 to... 11 drives the swing frame 59 to rotate downward against the elastic force of the torsion spring 510. The swing frame 59 drives the limit block 54 to move away from the limit groove 52 through the movable rod 512, so that the limit block 54 exits from the limit groove 52, thereby releasing the locking state between the limit frame 53 and the fixed seat 51. After the reset is completed, the limit frame 53 can slide relative to the fixed seat 51 again. After the operator confirms that the drill bit 4 and the workpiece are in normal condition, the drive module 3 and the vertical drive device can be restarted through the control panel 2 to carry out subsequent drilling.

[0026] When the drill bit 4 is not being drilled, the limit bracket 53 can protect the drill bit 4, preventing hard objects from hitting the cutting edge of the drill bit 4 when loading and unloading workpieces or cleaning the machining table 8, protecting the precision cutting edge from external damage, and extending the standby life of the drill bit 4; at the same time, it isolates the operator from direct contact with the sharp drill bit 4, reducing the risk of accidental scratches, and preventing surrounding chips and debris from falling and scraping the cutting edge. There is no need to add an additional protective cover. The limit bracket 53 has the dual effect of operation safety and tool maintenance.

[0027] like Figure 1 , Figures 8 to 12As shown, the machining table 8 has an internal support assembly for supporting drive axle components and adjustable according to their thickness. The support assembly includes a mounting base 91 fixedly connected inside the machining table 8. A base plate 92 is slidably connected inside the mounting base 91. Grooves 93 are fixedly connected to the four corners of the upper surface of the base plate 92. Sliding strips 94 are slidably connected to the inner sides of the four grooves 93. A pad 95 is fixedly connected to the top of the four sliding strips 94. Three slots 96 are provided at one end of the pad 95, and three blocks 97 are fixedly connected to the other end. Fixing blocks 98 are fixedly connected to both ends of the upper surface of the base plate 92. A bidirectional threaded rod 99 is rotatably connected to both fixing blocks 98. One end of the threaded rod 99 is provided with a guide groove 910. A spring 911 is fixedly connected inside the guide groove 910. A guide rod 912 is fixedly connected to the end of the spring 911 away from the guide groove 910. The guide rod 912 is slidably connected inside the guide groove 910. A gear frame 913 is fixedly connected to the end of the guide rod 912 away from the spring 911. A gear ring 914 is fixedly connected to a fixing block 98 near the gear frame 913. The outer surface of the bidirectional threaded rod 99 is provided with two opposite threads. Two moving rings 915 are connected to the outer threads of the two opposite threads. The top of each of the two moving rings 915 is rotatably connected to a support rod 916. The tops of the two support rods 916 are rotatably connected to the bottom ends of the pad frame 95, respectively.

[0028] It should be noted that the mounting base 91 has multiple T-shaped grooves, and the bottom of the base plate 92 is fixedly connected to multiple T-shaped strips. The base plate 92 slides within the T-shaped grooves of the mounting base 91 via the T-shaped strips. Figure 8 and Figure 12 As shown, there are two types of pads 95. One pad 95 located above the base plate 92 is the main support, and the two pads 95 located on the side are auxiliary supports. The addition or removal of the two pads 95 on the side is used to adapt to the processing of different sized parts of the drive axle. The guide rod 912 can only slide laterally inside the guide groove 910. The side of the gear frame 913 near the guide rod 912 abuts and engages with the gear ring 914. The side of the gear frame 913 away from the gear ring 914 is provided with a handle, which makes it easy for the operator to hold and rotate the gear frame 913.

[0029] Specifically, when using drill bit 4 to drill through holes in the drive axle components, to ensure the drilling quality at both ends of the through hole, drill bit 4 needs to continue moving downwards after passing through the drive axle components. However, during this process, drill bit 4 is prone to colliding with the surface of the machining table 8, causing damage to the surface of the machining table 8. To address this, after the drive axle components are placed inside the machining table 8 and fixed in place by positioning pins, the drive axle components will abut against the support frame 95. The support frame 95 then supports the drive axle components, preventing them from approaching the surface of the machining table 8 and creating an independent drilling avoidance space. When drill bit 4 drills through holes in the drive axle components, it can prevent drill bit 4 from continuing to move downwards and contacting the machining table 8, preventing damage to the machining table 8 and saving the maintenance cost of frequent table repair and grinding. At the same time, the bottom support frame 95 structure facilitates smooth chip discharge, preventing chips from remaining on the surface of the machining table 8, thus balancing worktable protection and workpiece machining quality, improving clamping and positioning consistency and work efficiency.

[0030] For drive axle components of different specifications, after the drill bit 4 passes through the component, it needs to continue to move downwards for a certain distance to ensure effective drilling of the component. Therefore, it is necessary to calculate the downward distance of the drill bit 4 when machining drive axle components of different specifications during CNC programming, which will increase the programming and debugging steps. To this end, the height of the support frame 95 can be adjusted to compensate for the downward distance that the drill bit 4 needs to pass through the component. The operator holds the handle of the gear frame 913 and pulls it. The gear frame 913 will drive the guide rod 912 to move laterally inside the guide groove 910. The movement of the guide rod 912 will stretch the spring 911. At this time, the guide rod 912 will no longer be in contact with the gear ring 914. Then the operator rotates the gear frame 913. The gear frame 913 will drive the double-threaded rod 99 to rotate in the fixed block 98 through the guide rod 912. When the double-threaded rod 99 rotates, the two moving rings 915 will move to both sides through the threaded engagement. The two moving rings 915 will push the two support rods 916 respectively, so that the two support rods 916 will rotate downward about the rotational connection point with the support frame 95. When 916 rotates, it pushes the pad 95 upward. When the pad 95 moves upward, it drives the slide bar 94 to move upward within the slot plate 93. At this time, the slot plate 93 guides the slide bar 94 to ensure that the pad 95 moves upward stably. By adjusting the height of the pad 95, it can support parts that require different heights, compensate for the drill bit 4's downward allowance required for drilling through different specifications of drive axle parts, and eliminate the need to program and calculate the downward distance for each workpiece separately, simplifying CNC programming. When changing models, there is no need to replace the pad 95; the height of the pad 95 can be quickly adjusted to adapt to the new workpiece, shortening the changeover and debugging time. At the same time, it always ensures reasonable drilling clearance space, takes into account both worktable protection and drill bit 4 idle loss control, and improves the adaptability and production efficiency of drilling processing for various types of drive axle parts.

[0031] It should be noted that after adjusting the height of the pad 95 by rotating the bidirectional threaded rod 99, the rotation of the bidirectional threaded rod 99 needs to be locked to prevent accidental rotation of the bidirectional threaded rod 99 after the height of the pad 95 is adjusted, which could lead to support failure. To do this, the operator can loosen the handle of the gear frame 913. Under the elastic reset action of the spring 911, the guide rod 912 moves towards the side closer to the spring 911 inside the guide groove 910. The guide rod 912 will drive the gear frame 913 to abut against the gear ring 914. At this time, the gear frame 913 will engage with the gear ring 914. The gear ring 914 can prevent the gear frame 913 from rotating. With the cooperation of the guide rod 912 and the guide groove 910, the gear frame 913 can restrict the rotation of the bidirectional threaded rod 99.

[0032] Furthermore, for drive axle components of different sizes, the overall support range can be adjusted by adding or removing auxiliary support brackets 95. For larger drive axle components, new support brackets 95 can be installed at the end of the original support brackets 95 through the snap-fit ​​action of the clip 97 and the slot 96, thereby expanding the support range of the support brackets 95. For smaller drive axle components, the support brackets 95 on both sides can be removed to reduce the support range of the support brackets 95.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A machine tool for machining drive bridges, comprising a machine tool frame (1), a control panel (2) fixedly connected to the machine tool frame (1), a drive module (3) disposed on the machine tool frame (1), a drill bit (4) disposed at the bottom of the drive module (3), a longitudinal movement module (6) fixedly connected to the machine tool frame (1), a transverse movement module (7) disposed on the longitudinal movement module (6), and a machining table (8) fixedly connected to the transverse movement module (7), characterized in that, The drive module (3) is equipped with a protective component for protecting and limiting the drilling of the drill bit (4); The protection component includes two fixed seats (51) that are bolted to both sides of the drive module (3). Each fixed seat (51) has a linearly arranged limiting groove (52) inside. A limiting frame (53) is slidably connected inside both fixed seats (51). Limiting blocks (54) are slidably connected laterally at both ends of the limiting frame (53) inside the two fixed seats (51). Two rotating seats (55) are fixedly connected to the bottom of the limiting frame (53). A trigger plate (56) is rotatably connected to each of the two rotating seats (55). Each trigger plate (56) has two sockets (57), a pressure rod (58) is rotatably connected to the limit frame (53), a swing frame (59) is rotatably connected to each of the two rotating seats (55), a torsion spring (510) is provided at the rotatable connection between each swing frame (59) and the rotating seat (55), an abutment rod (511) is fixedly connected to each of the two swing frames (59) by bolts, and a movable rod (512) is slidably connected to each of the two swing frames (59), and the top of each of the two movable rods (512) is rotatably connected to the two limit blocks (54) respectively.

2. The machine tool for machining drive axles according to claim 1, characterized in that, A device for vertical driving is provided between the drive module (3) and the machine tool frame (1). The drive module (3) consists of a housing, a motor, and a chuck. The drill bit (4) is clamped and connected by the chuck of the drive module (3). The machining table (8) is equipped with a positioning pin for positioning drive axle components.

3. The machine tool for processing drive axles according to claim 2, characterized in that, The limiting frame (53) is set in a V shape. A ring is set at the bottom of the limiting frame (53). The ring of the limiting frame (53) is sleeved on the outside of the drill bit (4). A pressure sensor is set at the bottom of the ring of the limiting frame (53). The shape of the end of the limiting block (54) near the limiting groove (52) is adapted to the shape of the limiting groove (52). The trigger plate (56) is made of tungsten carbide hard alloy. The pressing rod (58) consists of a frame and two long rods. The two long rods of the pressing rod (58) correspond to the positions of the two adjacent insertion holes (57) and are inserted.

4. The machine tool for processing drive axles according to claim 1, characterized in that, The processing table (8) is equipped with a support assembly for supporting drive axle components and adjustable according to the thickness of the drive axle components. The support assembly includes a mounting base (91) fixedly connected inside the processing table (8). A base plate (92) is slidably connected inside the mounting base (91). A groove plate (93) is fixedly connected to each of the four corners of the upper surface of the base plate (92). A slide bar (94) is slidably connected to the inner side of each of the four groove plates (93). A pad frame (95) is fixedly connected to the top of each of the four slide bars (94). The support assembly also includes three slots (96) opened at one end of the pad (95), and three blocks (97) are fixedly connected to the other end of the pad (95).

5. The machine tool for processing drive axles according to claim 4, characterized in that, The support assembly also includes two fixed blocks (98) fixedly connected to both ends of the upper surface of the base plate (92). A bidirectional threaded rod (99) is rotatably connected to both fixed blocks (98). A guide groove (910) is provided at one end of the bidirectional threaded rod (99). A spring (911) is fixedly connected inside the guide groove (910). A guide rod (912) is fixedly connected at the end of the spring (911) away from the guide groove (910). The guide rod (912) is slidably connected inside the guide groove (910). A gear frame (913) is fixedly connected at the end of the guide rod (912) away from the spring (911). A gear ring (914) is fixedly connected to a fixed block (98) near the gear frame (913). Two movable rings (915) are threadedly connected to the outer side of the bidirectional threaded rod (99). A support rod (916) is rotatably connected to the top of each of the two movable rings (915). The top ends of the two support rods (916) are rotatably connected to the bottom ends of the pad frame (95).

6. The machine tool for machining drive axles according to claim 5, characterized in that, The mounting base (91) has multiple T-shaped grooves, and the bottom of the base plate (92) is fixedly connected to multiple T-shaped strips. The base plate (92) slides in the T-shaped grooves of the mounting base (91) through the T-shaped strips.

7. The machine tool for machining drive axles according to claim 6, characterized in that, The guide rod (912) can only slide laterally inside the guide groove (910). The side of the gear frame (913) near the guide rod (912) abuts and engages with the gear ring (914). A handle is provided on the side of the gear frame (913) away from the gear ring (914).

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