Radial drilling machine for processing zinc-aluminum-silicon-magnesium-chromium alloy

Abstract

The invention relates to the technical field of drilling machines, in particular to a radial drilling machine for zinc-aluminum-silicon-magnesium-chromium alloy machining, which comprises an L-shaped rocker arm and a spindle box mounted on the L-shaped rocker arm, the spindle box is matched with the L-shaped rocker arm to adjust the drilling position, and a rotatable assembled drill bit is mounted on the lower portion of the spindle box. An axial flow channel and a forking flow channel are formed in the assembled drill bit; the forking runner directly sprays the gas-liquid mixed medium, and compared with an external cutting fluid spraying mode in the traditional technology, the gas-liquid mixed medium can directly reach the end of the drill bit and take away cutting powder.

Description

Technical Field

[0001] This invention relates to the field of drilling technology, specifically to a radial drilling machine for machining zinc-aluminum-silicon-magnesium-chromium alloys. Background Technology

[0002] Radial drilling machines are widely used hole-making equipment. Their core feature is a radial arm that can rotate and rise around a column. The drill bit is installed in the spindle box on the radial arm, allowing for flexible adjustment of the machining position. Zinc-aluminum-silicon-magnesium-chromium alloy is an alloy material containing multiple elements such as zinc, aluminum, silicon, magnesium, and chromium. In current technology, large-volume zinc-aluminum-silicon-magnesium-chromium alloy workpieces are usually drilled using radial drilling machines. However, the zinc and aluminum elements in zinc-aluminum-silicon-magnesium-chromium alloy give the alloy a certain degree of plasticity. During drilling, the friction between the tool, chips, and workpiece surface is intense, generating a large amount of heat. Especially at high speeds, this causes the tool temperature to rise, and high-speed steel tools are prone to losing hardness due to overheating. Currently, the technology usually uses cutting fluid spraying for cooling. However, as the drilling deepens, the cutting fluid has difficulty reaching or can only reach a small amount of the drill bit, resulting in an unsatisfactory cooling effect. Summary of the Invention

[0003] The purpose of this invention is to provide a radial drilling machine for machining zinc-aluminum-silicon-magnesium-chromium alloys, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a radial drilling machine for machining zinc-aluminum-silicon-magnesium-chromium alloys, comprising an L-shaped radial arm and a spindle box mounted on the L-shaped radial arm. The spindle box adjusts the drilling position by cooperating with the L-shaped radial arm. A rotatable assembly drill bit is mounted on the lower part of the spindle box. The assembly drill bit has an axial flow channel and a branch flow channel. The axial flow channel is arranged along the axial direction of the assembly drill bit, and the axial flow channel and the branch flow channel are interconnected. The other end of the branch flow channel opens to the outside through the back of the main cutting edge of the assembly drill bit. The machine also includes a gas-liquid pulse mixing component, which is connected to the axial flow channel, so that when the assembly drill bit is rotating and drilling, the branch flow channel can spray a mixture of cutting fluid and compressed gas in the form of pulse waves.

[0005] The gas-liquid pulse mixing assembly includes a pulse mixing cylinder, a floating cover pressure plate, and a positioning bottom shaft. The floating cover pressure plate is located inside the pulse mixing cylinder, and the positioning bottom shaft is coaxially fixedly installed at the lower position of the floating cover pressure plate. A cam is provided above the floating cover pressure plate, and the cam drives the floating cover pressure plate axially by rotating. A positioning bracket is fixedly provided on the inner wall surface of the pulse mixing cylinder, and the positioning bottom shaft is radially limited by the positioning bracket.

[0006] A limit block is fixedly installed at the lower end of the positioning bottom shaft. A support spring is provided between the positioning bracket and the floating cover pressure plate. The support spring applies an upward elastic support force to the floating cover pressure plate. A corrugated connecting ring is provided between the outer edge of the floating cover pressure plate and the inner wall of the pulse mixing cylinder. The elastic deformation of the corrugated connecting ring allows the floating cover pressure plate to move axially.

[0007] The outer wall surface of the pulse mixing cylinder is connected to a compressed air inlet pipe and a cutting fluid pipe. A liquid pump module is installed on the cutting fluid pipe, which pumps cutting fluid into the pulse mixing cylinder under positive pressure. A one-way valve is also installed on the cutting fluid pipe, which is located between the pulse mixing cylinder and the liquid pump module. The one-way valve allows the cutting fluid to flow unidirectionally from the liquid pump module to the pulse mixing cylinder.

[0008] The bottom of the pulse mixing cylinder is connected to a mixing output pipe, and the other end of the mixing output pipe is connected to the axial flow channel through a rotary sealing device, so that the medium in the pulse mixing cylinder can be input into the axial flow channel; a pulse motor is fixedly installed on the outside of the pulse mixing cylinder, and the pulse motor is used to drive the cam part to rotate.

[0009] The inner wall of the pulse mixing cylinder is provided with an inner vertical groove, and the outer surface of the floating cover pressure plate is fixedly provided with a vertical groove plate. The vertical groove plate is limited in the inner vertical groove, so that the floating cover pressure plate can only move axially.

[0010] The positioning base shaft has an internal cavity, in which an inner convex threaded ring is provided. A threaded shaft is screwed into the inner convex threaded ring. When the threaded shaft rotates, it can move up and down axially within the cavity by engaging with the inner convex threaded ring.

[0011] A lifting gear disk is fixedly installed at the end of the threaded shaft. The cam part engages with the lifting gear disk to drive the floating cover pressure plate axially. During drilling, as the drilling depth of the assembled drill bit increases, the lifting gear disk gradually moves towards the cam part, so that the driving stroke gradually increases when the cam part drives the floating cover pressure plate axially through the lifting gear disk. The lifting gear disk is externally meshed with sliding shaft teeth. The axial length of the sliding shaft teeth is greater than the active stroke of the lifting gear disk, so that the lifting gear disk and the sliding shaft teeth always remain meshed during the axial movement.

[0012] A gear support arm is fixedly installed on the pulse mixing cylinder. An optical axis is provided at the end of the sliding gear. The optical axis passes through the gear support arm to limit the sliding gear, so that the sliding gear can only rotate relative to the gear support arm. A worm gear is fixedly installed at the other end of the optical axis. A worm is meshed with the outside of the worm gear. The worm gear is driven to rotate through the worm, thereby driving the sliding gear to rotate.

[0013] A stabilizing arm is fixedly mounted on the shaft tooth support arm, and an adjusting shaft is coaxially fixedly mounted on the worm gear. The adjusting shaft passes through the stabilizing arm and a regulating motor is mounted on the other end of the adjusting shaft. The regulating motor controls the rotation of the worm gear through the adjusting shaft.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention relates to a radial drilling machine for machining zinc-aluminum-silicon-magnesium-chromium alloys. During the drilling process of zinc-aluminum-silicon-magnesium-chromium alloys, to address the issue of excessive heat generation, the machine utilizes a combination of axial flow channels, branched flow channels, and a gas-liquid pulse mixing component. This allows the branched flow channels to directly spray a gas-liquid mixture. Compared to the traditional method of externally spraying cutting fluid, this gas-liquid mixture can directly reach the drill bit tip and carry away cutting debris, resulting in better cooling and lubrication.

[0015] This invention utilizes a gas-liquid pulse mixing component to mix cutting fluid and compressed air to form a gas-liquid mixture medium, thereby reducing cutting fluid consumption, reducing pollution, and improving the fluidity of the cutting fluid in the drill bit gaps. The gas-liquid pulse mixing component also gives the gas-liquid mixture medium the impact of pulse fluctuations, which can more efficiently remove dust and debris during drilling, reduce drill bit wear, and improve drilling efficiency.

[0016] By using a combination of a lifting gear disc, sliding shaft gears, and a regulating motor, the amplitude of the pulse fluctuation can be automatically reduced when the drill bit first starts drilling at a low depth. As the drill bit extends deeper, the amplitude of the pulse fluctuation is automatically increased. This reduces the problem of gas-liquid mixture splashing under pulse impact when the initial drilling depth is low. As the hole depth increases, the amplitude increases to ensure the impact chip removal effect, achieving a more intelligent adaptive adjustment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a front view of the overall structure of the present invention.

[0019] Figure 3 This is a three-dimensional half-section schematic diagram of the assembled drill bit of the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of the pulse mixing cylinder of the present invention.

[0021] Figure 5 This is a three-dimensional half-section schematic diagram of the pulse mixing cylinder of the present invention.

[0022] Figure 6 This is a partial three-dimensional cross-sectional view of the pulse mixing cylinder of the present invention.

[0023] Figure 7 This is a three-dimensional half-section front view of the pulse mixing cylinder of the present invention.

[0024] In the diagram: 1. L-shaped rocker arm; 2. Spindle box; 3. Drill bit assembly; 4. Axial flow channel; 5. Forked flow channel; 6. Pulse mixing cylinder; 7. Floating cover pressure plate; 8. Positioning bottom shaft; 9. Cam section; 601. Positioning bracket; 602. Limiting end block; 603. Support spring; 604. Corrugated connecting ring; 605. Compression air inlet pipe; 606. Cutting fluid pipe; 607. Liquid pump module; 608. One-way valve; 609. Mixing output pipe; 610. Pulse motor; 701. Inner wall vertical groove; 702. Vertical groove clamping plate; 703. Accommodating cavity; 704. Internally protruding threaded ring; 705. Threaded shaft; 706. Lifting gear disc; 707. Sliding shaft gear; 708. Shaft gear support arm; 709. Worm gear section; 710. Worm section; 711. Stabilizing support arm; 712. Adjusting shaft; 713. Control motor; 101. Machine tool base; 102. Worktable; 103. Track sliding edge. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1 to 7 This invention provides a technical solution: a radial drilling machine for machining zinc-aluminum-silicon-magnesium-chromium alloys, comprising an L-shaped radial arm 1 and a spindle box 2 mounted on the L-shaped radial arm 1. The spindle box 2 adjusts the drilling position by cooperating with the L-shaped radial arm 1. Figure 1 As shown, the bottom of the L-shaped rocker arm 1 is fixed with a machine tool base 101 by bolts, and the L-shaped rocker arm 1 is supported by the machine tool base 101. A worktable 102 is provided on the machine tool base 101 for placing workpieces.

[0027] The L-shaped rocker arm 1 is also equipped with a track slide 103. The spindle box 2 cooperates with the track slide 103, so that the spindle box 2 can move along the track slide 103 for position adjustment. The lower part of the spindle box 2 is equipped with a rotatable assembly drill bit 3, which has an axial flow channel 4 and a forked flow channel 5. The axial flow channel 4 is arranged along the axial direction of the assembled drill bit 3. The axial flow channel 4 is connected to the bifurcation flow channel 5. The other end of the bifurcation flow channel 5 opens to the outside through the back of the main cutting edge on the assembled drill bit 3. It also includes a gas-liquid pulse mixing component, which is connected to the axial flow channel 4, so that when the assembled drill bit 3 is rotating, the branch flow channel 5 can spray out a mixture of cutting fluid and compressed gas in the form of pulse waves.

[0028] The gas-liquid pulse mixing assembly includes a pulse mixing cylinder 6, a floating cover pressure plate 7, and a positioning bottom shaft 8. The floating cover pressure plate 7 is located inside the pulse mixing cylinder 6. The positioning bottom shaft 8 is coaxially welded and fixedly installed at the lower position of the floating cover pressure plate 7. A cam part 9 is provided above the floating cover pressure plate 7. The cam part 9 drives the floating cover pressure plate 7 axially by rotating. A positioning bracket 601 is welded and fixedly installed on the inner wall surface of the pulse mixing cylinder 6. The positioning bracket 601 radially limits the positioning bottom shaft 8.

[0029] A limiting end block 602 is welded and fixed to the lower end of the positioning base shaft 8. A support spring 603 is provided between the positioning bracket 601 and the floating cover pressure plate 7. The support spring 603 applies an upward elastic support force to the floating cover pressure plate 7. A corrugated connecting ring 604 is provided between the outer edge of the floating cover pressure plate 7 and the inner wall of the pulse mixing cylinder 6. The elastic deformation of the corrugated connecting ring 604 allows the floating cover pressure plate 7 to move axially.

[0030] The outer wall surface of the pulse mixing cylinder 6 is connected to a compressed air inlet pipe 605 and a cutting fluid pipe 606. A liquid pump module 607 is installed on the cutting fluid pipe 606. The liquid pump module 607 pumps the cutting fluid into the pulse mixing cylinder 6 under positive pressure. A one-way valve 608 is also installed on the cutting fluid pipe 606. The one-way valve 608 is located between the pulse mixing cylinder 6 and the liquid pump module 607. The one-way valve 608 allows the cutting fluid to flow unidirectionally from the liquid pump module 607 into the pulse mixing cylinder 6.

[0031] A mixing output pipe 609 is connected to the bottom of the pulse mixing cylinder 6. The other end of the mixing output pipe 609 is connected to the axial flow channel 4 through a rotary sealing device, so that the medium in the pulse mixing cylinder 6 can be input into the axial flow channel 4. Since the assembled drill bit 3 is in a rotating state during operation, the connection between the mixing output pipe 609 and the axial flow channel 4 cannot be directly connected through a pipe. The rotary sealing device of the present invention can be composed of two pipes that can rotate relative to each other. While maintaining the relative rotation function, the two pipes are sealed together by a sealing ring. One pipe is connected to the mixing output pipe 609, and the other pipe is connected to the end of the assembled drill bit 3 so that it is connected to the axial flow channel 4. The rotary sealing device is as described above, which is a common rotary sealing connection structure in the mechanical field in the prior art, and will not be illustrated in detail in this application.

[0032] A pulse motor 610 is fixedly mounted on the outside of the pulse mixing cylinder 6. The pulse motor 610 is used to drive the cam section 9 to rotate.

[0033] The pulse mixing cylinder 6 has an inner wall vertical groove 701. The outer surface of the floating cover pressure plate 7 is fixedly provided with a vertical groove retaining plate 702. The vertical groove retaining plate 702 is limited in the inner wall vertical groove 701, so that the floating cover pressure plate 7 can only move axially. The positioning bottom shaft 8 has a receiving cavity 703 inside. The receiving cavity 703 is provided with an inner convex threaded ring 704. A threaded shaft 705 is screwed and installed in the inner convex threaded ring 704. When the threaded shaft 705 rotates, it can move axially up and down in the receiving cavity 703 by cooperating with the inner convex threaded ring 704.

[0034] A lifting gear disk 706 is welded and fixed to the end of the threaded shaft 705. The cam part 9 performs axial drive on the floating cover pressure plate 7 by pressing and engaging with the lifting gear disk 706. During the drilling process, as the drilling depth of the assembled drill bit 3 increases, the lifting gear disk 706 gradually moves towards the direction of the cam part 9, so that when the cam part 9 drives the floating cover pressure plate 7 to move axially through the lifting gear disk 706, the driving stroke gradually increases. For depth detection of drilling with assembled drill bit 3: In one embodiment, a laser rangefinder is installed on the spindle box 2 to detect the distance between the laser rangefinder and the workpiece surface in real time. Given the distance between the end of the assembled drill bit 3 and the laser rangefinder, the drilling depth can be determined by subtracting the distance between the end of the assembled drill bit 3 and the laser rangefinder from the distance between the laser rangefinder and the workpiece surface.

[0035] In another embodiment, a pressure sensor is installed on the end clamp of the assembled drill bit 3. When the assembled drill bit 3 contacts the workpiece to open a hole, the pressure sensor detects the pressure and accumulates the descent stroke of the spindle box 2 to determine the depth of the hole.

[0036] The lifting gear disk 706 is externally meshed with a sliding shaft tooth 707. The axial length of the sliding shaft tooth 707 is greater than the travel of the lifting gear disk 706, so that the lifting gear disk 706 always maintains meshing with the sliding shaft tooth 707 during axial movement.

[0037] A gear support arm 708 is welded and fixed on the pulse mixing cylinder 6. A light shaft is provided at the end of the sliding gear 707. The light shaft passes through the gear support arm 708 to limit the sliding gear 707, so that the sliding gear 707 can only rotate relative to the gear support arm 708. A worm gear part 709 is fixedly provided at the other end of the light shaft. A worm part 710 is meshed with the outside of the worm gear part 709. The worm gear part 709 is driven to rotate by the worm part 710, thereby driving the sliding gear 707 to rotate.

[0038] A stabilizing arm 711 is welded and fixed on the shaft gear support arm 708, and an adjusting shaft 712 is coaxially welded and fixed on the worm gear part 710. The adjusting shaft 712 is limited and inserted through the stabilizing arm 711, and a regulating motor 713 is provided at the other end of the adjusting shaft 712. The regulating motor 713 controls the rotation of the worm gear part 710 through the adjusting shaft 712.

[0039] In use, the compressed air inlet pipe 605 is connected to a compressed air source, and the cutting fluid pipe 606 is connected to the cutting fluid. The cutting fluid is pumped into the pulse mixing cylinder 6 via the liquid pump module 607. During the drilling process of the assembled drill bit 3, compressed gas and cutting fluid are input into the pulse mixing cylinder 6 at constant flow rates, forming a gas-liquid mixture. This mixture is then input into the axial flow channel 4 through the mixing output pipe 609 and the rotary sealing device. Figure 3 As shown, the gas-liquid mixture is ejected from the bifurcation channel 5 through the axial flow channel 4, so that the end of the assembled drill bit 3 can be sufficiently cooled during the high-speed rotating drilling process.

[0040] During the above process, the pulse motor 610 drives the cam part 9 to rotate. The cam part 9 intermittently presses the floating cover pressure plate 7 through the lifting gear disk 706. With the support spring 603, the floating cover pressure plate 7 is in a high-frequency up-and-down oscillation state. When the floating cover pressure plate 7 moves down, the internal air pressure of the pulse mixing cylinder 6 increases significantly. When the floating cover pressure plate 7 moves up, the internal air pressure of the pulse mixing cylinder 6 decreases. This makes the gas-liquid mixture ejected in the bifurcation channel 5 have the impact of pulse fluctuation. Through pulse impact, the dust and debris generated during the drilling process can be discharged more efficiently.

[0041] During drilling with drill bit 3, if the initial drilling depth is shallow and the amplitude of the pulse fluctuation is too large, the peak distance of the compressed air mixed with cutting fluid splashing will be too far, affecting the hygiene of the surrounding machining environment. This invention, through its structural design, can adjust the distance between the lifting gear disc 706 and the floating cover pressure plate 7, thereby adaptively adjusting the amplitude, such as... Figure 6 As shown, specifically, the worm gear 710 is rotated by adjusting the motor 713, which drives the worm wheel 709. The worm wheel 709 causes the sliding gear 707 to rotate synchronously. The sliding gear 707 drives the lifting gear disk 706 to rotate through meshing. When the lifting gear disk 706 rotates, the threaded shaft 705 and the inner convex threaded ring 704 are helically engaged. According to the rotation direction of the lifting gear disk 706, the lifting gear disk 706 can be adjusted up and down, thereby adjusting the position between the lifting gear disk 706 and the sliding gear 707.

[0042] At the start of drilling, the distance between the lifting gear 706 and the sliding gear 707 is at its minimum, and the distance between the lifting gear 706 and the cam 9 is at its maximum. When the cam 9 indirectly pushes the floating cover plate 7 by squeezing the lifting gear 706, the floating cover plate 7 can only move slightly downward, thus reducing its amplitude. As the drilling depth increases, the distance between the lifting gear 706 and the floating cover plate 7 gradually increases, causing the cam 9 to gradually increase its driving stroke on the floating cover plate 7 during rotation. This results in a gradually increasing amplitude of the floating cover plate 7. By adjusting the amplitude of the floating cover plate 7, the pulse amplitude of the gas-liquid mixture changes synchronously. When the drill bit 3 first starts drilling at a low depth, the amplitude of the pulse fluctuation is automatically reduced. As the drill extends deeper, the amplitude of the pulse fluctuation is automatically increased, reducing the problem of gas-liquid mixture splashing under pulse impact when the initial drilling depth is low. As the hole depth increases, the amplitude increases to ensure effective chip removal through impact.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A radial drilling machine for machining zinc-aluminum-silicon-magnesium-chromium alloys, comprising an L-shaped radial arm and a spindle box mounted on the L-shaped radial arm, wherein the spindle box adjusts the drilling position by cooperating with the L-shaped radial arm, and a rotatable assembly drill bit is mounted on the lower part of the spindle box, characterized in that: The assembled drill bit is provided with an axial flow channel and a bifurcation flow channel; The axial flow channel is arranged along the axial direction of the assembled drill bit, and the axial flow channel is connected to the branch flow channel. The other end of the branch flow channel opens to the outside through the back of the main cutting edge of the assembled drill bit. It also includes a gas-liquid pulse mixing component, which is connected to the axial flow channel, so that when the assembled drill bit is rotating, the branch flow channel can spray a mixture of cutting fluid and compressed gas in the form of pulse waves.

2. The radial drilling machine for machining zinc-aluminum-silicon-magnesium-chromium alloys according to claim 1, characterized in that: The gas-liquid pulse mixing assembly includes a pulse mixing cylinder, a floating cover pressure plate, and a positioning bottom shaft. The floating cover pressure plate is located inside the pulse mixing cylinder, and the positioning bottom shaft is coaxially fixedly installed at the lower position of the floating cover pressure plate. A cam is provided above the floating cover pressure plate, and the cam drives the floating cover pressure plate axially by rotating. A positioning bracket is fixedly installed on the inner wall surface of the pulse mixing cylinder, and the positioning bracket is used to radially limit the positioning bottom shaft.

3. The radial drilling machine for machining zinc-aluminum-silicon-magnesium-chromium alloys according to claim 2, characterized in that: A limit block is fixedly installed at the lower end of the positioning bottom shaft. A support spring is provided between the positioning bracket and the floating cover pressure plate. The support spring applies an upward elastic support force to the floating cover pressure plate. A corrugated connecting ring is provided between the outer edge of the floating cover pressure plate and the inner wall of the pulse mixing cylinder. The elastic deformation of the corrugated connecting ring allows the floating cover pressure plate to move axially.

4. The radial drilling machine for machining zinc-aluminum-silicon-magnesium-chromium alloys according to claim 3, characterized in that: The outer wall surface of the pulse mixing cylinder is connected to a compressed air inlet pipe and a cutting fluid pipe. A liquid pump module is installed on the cutting fluid pipe, which pumps cutting fluid into the pulse mixing cylinder under positive pressure. A one-way valve is also installed on the cutting fluid pipe, which is located between the pulse mixing cylinder and the liquid pump module. The one-way valve allows the cutting fluid to flow unidirectionally from the liquid pump module to the pulse mixing cylinder.

5. A radial drilling machine for machining zinc-aluminum-silicon-magnesium-chromium alloys according to claim 2, characterized in that: The bottom of the pulse mixing cylinder is connected to a mixing output pipe, and the other end of the mixing output pipe is connected to the axial flow channel through a rotary sealing device, so that the medium in the pulse mixing cylinder can be input into the axial flow channel. A pulse motor is fixedly mounted on the outside of the pulse mixing cylinder, and the pulse motor is used to drive the cam section to rotate.

6. A radial drilling machine for machining zinc-aluminum-silicon-magnesium-chromium alloys according to claim 2, characterized in that: The inner wall of the pulse mixing cylinder is provided with an inner vertical groove, and the outer surface of the floating cover pressure plate is fixedly provided with a vertical groove plate. The vertical groove plate is limited in the inner vertical groove, so that the floating cover pressure plate can only move axially.

7. A radial drilling machine for machining zinc-aluminum-silicon-magnesium-chromium alloys according to claim 2, characterized in that: The positioning base shaft has an internal cavity, in which an inner convex threaded ring is provided. A threaded shaft is screwed into the inner convex threaded ring. When the threaded shaft rotates, it can move up and down axially within the cavity by engaging with the inner convex threaded ring.

8. A radial drilling machine for machining zinc-aluminum-silicon-magnesium-chromium alloys according to claim 7, characterized in that: A lifting gear disk is fixedly provided at the end of the threaded shaft, and the cam part drives the floating cover pressure plate axially by pressing and engaging with the lifting gear disk. During the drilling process, as the drilling depth of the assembled drill bit increases, the lifting gear disk gradually moves towards the direction of the cam section, so that when the cam section drives the floating cover pressure plate to move axially through the lifting gear disk, the driving stroke gradually increases. The lifting gear disk is externally meshed with sliding shaft teeth. The axial length of the sliding shaft teeth is greater than the travel of the lifting gear disk, so that the lifting gear disk remains meshed with the sliding shaft teeth during axial movement.

9. A radial drilling machine for machining zinc-aluminum-silicon-magnesium-chromium alloys according to claim 8, characterized in that: A gear support arm is fixedly installed on the pulse mixing cylinder. An optical axis is provided at the end of the sliding gear. The optical axis passes through the gear support arm to limit the sliding gear, so that the sliding gear can only rotate relative to the gear support arm. A worm gear is fixedly installed at the other end of the optical axis. A worm is meshed with the outside of the worm gear. The worm gear is driven to rotate through the worm, thereby driving the sliding gear to rotate.

10. A radial drilling machine for machining zinc-aluminum-silicon-magnesium-chromium alloys according to claim 9, characterized in that: A stabilizing arm is fixedly mounted on the shaft tooth support arm, and an adjusting shaft is coaxially fixedly mounted on the worm gear. The adjusting shaft passes through the stabilizing arm and a regulating motor is mounted on the other end of the adjusting shaft. The regulating motor controls the rotation of the worm gear through the adjusting shaft.

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