Die casting machine barrel additive-subtractive remanufacturing equipment

Abstract

This invention relates to the field of combined processing technology and discloses a die-casting machine cylinder addition and subtraction remanufacturing equipment, including a machine tool and a three-jaw chuck installed at the output end of the spindle of the machine tool spindle box, wherein the three-jaw chuck is used to clamp the die-casting machine cylinder. This invention relies on the machining posture of the rocker arm deflection to control the instantaneous opening and closing of the sealing plug, achieving precise control of powder flow. No electrical precision components are involved in the operation of the high-temperature working area, significantly improving the operational stability of the equipment under deep-hole high-temperature cladding conditions, effectively reducing the probability of equipment failure and subsequent maintenance and parts replacement costs, significantly extending the overall service life of the equipment. It is suitable for long-term, continuous high-temperature remanufacturing repair operations. This short-distance, close-proximity powder feeding layout enables instantaneous powder flow, effectively ensuring the uniformity of the laser cladding layer forming on the inner wall of the cylinder and the surface flatness, reducing the subsequent boring and finishing machining allowance, and significantly improving the cylinder remanufacturing yield and repair accuracy.

Description

Technical Field

[0001] This invention belongs to the field of combined processing technology, specifically, it relates to a die-casting machine barrel remanufacturing equipment for adding or subtracting materials. Background Technology

[0002] The die-casting machine barrel is a core component of the die-casting equipment, bearing the load, conveying, and injecting of high-temperature molten metal over long periods. Under complex working conditions of high intensity, high temperature, and high friction, the inner wall of the barrel is prone to defects such as wear, scratches, corrosion, and localized dents, directly affecting the die-casting precision and product quality. If the barrel defects continue to expand, it can lead to a series of problems such as die-casting leakage, product dimensional deviations, and increased equipment vibration. Currently, the industry mainly uses laser cladding additive repair combined with subsequent grinding and boring to repair defects in the inner wall of the die-casting machine barrel. Compared with traditional repair processes such as welding and spraying, laser cladding has advantages such as a small heat-affected zone, high bonding strength of the cladding layer, and high repair precision, and is widely used in the field of precision parts remanufacturing.

[0003] However, the powder feeding control system of existing cladding equipment mostly uses external electric valves to control the powder start-stop and on / off. Since the cladding operation on the inner wall of the barrel needs to penetrate deep into the workpiece, the operating environment temperature is extremely high. The electrical components and sealing structure inside the electric valve are exposed to high temperature radiation environment for a long time, which makes them prone to aging, failure, and burnout. The equipment has a high failure rate and short service life, requiring frequent maintenance and replacement, which greatly increases the equipment operation and maintenance costs. If a valve is installed at the far end of the pipeline, when the valve receives the material cut-off signal, the powder remaining in the pipeline cannot be cut off synchronously, resulting in delayed powder falling. This can easily cause processing defects such as cavitation, local material accumulation, and inclusions in the cladding layer, resulting in poor flatness of the cladding layer on the inner wall of the barrel, uneven forming quality, and a significant increase in subsequent finishing allowance. In severe cases, it can even cause the barrel to be repaired and scrapped.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A die-casting machine cylinder addition and subtraction remanufacturing equipment includes a machine tool and a three-jaw chuck installed at the spindle output end of the machine tool spindle box, wherein the three-jaw chuck is used to clamp the die-casting machine cylinder.

[0006] The machine tool is slidably mounted with a fixed seat, and a reversing disk is rotatably mounted on the fixed seat. A pair of connecting frames are mounted on the reversing disk, one of which is collinear with the axis of the three-jaw chuck. A laser cladding component and a boring component are respectively mounted on the two connecting frames. The laser cladding assembly includes a rocker arm rotatably mounted on the side wall of the connecting frame. A fiber laser cladding head is mounted on one end of the rocker arm, and the distance between the fiber laser cladding head and the center of rotation of the rocker arm is smaller than the distance between the other end and the center of rotation of the rocker arm. This is to ensure that when the top of the rocker arm is pressed against the inner wall of the die-casting machine cylinder, there is a processing distance between the fiber laser cladding head and the die-casting machine cylinder. A deflection assembly for driving the rocker arm to deflect is mounted on the connecting frame. A powder feeding pipe is provided on the outer wall of the fiber laser cladding head, and a sealing plug is inserted into the inlet of the powder feeding pipe. The sealing plug is in contact with a cam mounted on the center of rotation of the rocker arm. When the rocker arm deflects, the opening and closing of the powder feeding pipe is completed simultaneously. The boring assembly includes a cutting tool mounted on another connecting bracket.

[0007] In a preferred embodiment of the present invention, a plurality of pairs of pads are installed at the bottom of the machine tool, and anti-slip grooves are provided at the bottom of the pads. A slide is installed on the side wall of the fixed seat. The slide is connected to the transverse feed system on the machine tool and is used to control the horizontal sliding of the slide. A controller is installed on the side wall of the slide. The controller is used to start and stop the transverse feed system, the laser cladding assembly and the boring assembly.

[0008] In a preferred embodiment of the present invention, an adjusting electric push rod is installed at the bottom of the machine tool, a connecting block is installed at the output end of the adjusting electric push rod, a support plate is installed on the top of the connecting block, a pair of connecting plates are installed on the support plate, a drive shaft is rotatably installed on the pair of connecting plates, and a positioning roller is installed on the drive shaft. The positioning roller is attached to the bottom of the die-casting machine cylinder that has been clamped.

[0009] In a preferred embodiment of the present invention, a reversing motor is installed on the side wall of the fixed base, a reversing shaft is installed at the output end of the reversing motor, the reversing shaft is movably connected to the fixed base, a reversing disc is installed at the output end of the reversing shaft, and the reversing motor is used to drive different connecting frames to align with the die-casting machine cylinder.

[0010] In a preferred embodiment of the present invention, a positioning shaft is installed at the rotation center of the rocker arm, the positioning shaft is movably connected to the connecting frame, the rotation center of the positioning shaft is connected to the cam, the cam is placed in the notch opened in the connecting frame, and a cover plate is installed on the notch, an arc-shaped frame is installed on the top of the rocker arm, a ball sleeve is installed on the arc-shaped frame, and a rolling ball is movably embedded in the ball sleeve, and the rolling ball is convenient to contact the inner wall of the die-casting machine cylinder.

[0011] In a preferred embodiment of the present invention, a fine-tuning electric push rod is installed on the side wall of the notch, a slide rod is installed at the output end of the fine-tuning electric push rod, and a swing arm is rotatably installed at both ends of the slide rod. The end of the swing arm is rotatably connected to the end of the rocker arm. A through slot is provided on the connecting frame, and the slide rod moves through the through slot. The rocker arm and the swing arm are in the shape of a V.

[0012] In a preferred embodiment of the present invention, an adjusting cover is installed at the inlet of the powder feeding pipe, a powder feeding pipe is installed on the top of the adjusting cover, the powder feeding pipe is connected to the powder supply source, a support frame is installed on the outer wall of the powder feeding pipe, and the support frame is installed on the connecting frame, the outlet of the powder feeding pipe is aligned with the processing position of the fiber laser cladding head, a sliding cover is installed on the side wall of the adjusting cover, the sealing plug is slidably disposed inside the sliding cover and the adjusting cover, a bracket is installed on the side wall of the adjusting cover, and the bracket is installed on the side wall of the connecting frame.

[0013] In a preferred embodiment of the present invention, a push rod is installed on the side wall of the sealing plug. The push rod is in a horizontal state and moves through the sliding cover. A ball is installed at the end of the push rod, and the end of the ball corresponds to the side wall of the cam.

[0014] In a preferred embodiment of the present invention, a baffle is installed on the sealing plug, and a tension spring is sleeved on the outer wall of the push rod. One end of the tension spring is connected to the baffle, and the other end of the tension spring is connected to the side wall of the sliding cover. The tension spring is used to drive the ball to always be in contact with the cam surface.

[0015] In a preferred embodiment of the present invention, a displacement electric push rod is mounted on the tool arm, the housing of the displacement electric push rod is mounted on the side wall of another connecting frame, and the tool is a boring tool.

[0016] Compared with the prior art, the present invention has the following advantages: This invention relies on the machining posture of the rocker arm to control the instantaneous opening and closing of the sealing plug, achieving precise control of powder flow. No electrical precision components are involved in the operation of the high-temperature working area, which greatly improves the operational stability of the equipment under the condition of deep hole high-temperature cladding, effectively reduces the probability of equipment failure and the cost of subsequent maintenance and parts replacement, and significantly extends the overall service life of the equipment. It can be adapted to long-term, continuous high-temperature remanufacturing and repair operations. The short-distance close-fitting powder feeding layout can achieve instantaneous powder flow, effectively ensuring the uniformity of the laser cladding layer forming and the surface flatness of the inner wall of the barrel, reducing the subsequent boring and finishing allowance, and significantly improving the barrel remanufacturing yield and repair accuracy.

[0017] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0018] In the attached diagram: Figure 1 A 3D diagram of a die-casting machine barrel remanufacturing equipment for adding or subtracting materials; Figure 2 A front view of a die-casting machine barrel remanufacturing equipment for adding or subtracting materials; Figure 3A 3D view of the pallet of a die-casting machine barrel remanufacturing equipment for adding or subtracting materials; Figure 4 Partially related to a die-casting machine barrel addition and subtraction remanufacturing equipment Figure 1 ; Figure 5 Partially related to a die-casting machine barrel addition and subtraction remanufacturing equipment Figure 2 ; Figure 6 A remanufacturing equipment for adding or subtracting materials from the barrel of a die casting machine Figure 5 Enlarged view of point A in the middle; Figure 7 A schematic diagram of the internal structure of a notch in a die-casting machine barrel remanufacturing equipment for adding or subtracting materials. Figure 8 This is a cross-sectional view of the adjustment cover of a die-casting machine cylinder remanufacturing equipment for adding or subtracting materials.

[0019] In the diagram: 1. Machine tool; 2. Pad; 3. Three-jaw chuck; 4. Fixed base; 5. Slide; 6. Controller; 7. Support plate; 8. Connecting plate; 9. Drive shaft; 10. Positioning roller; 11. Adjusting electric push rod; 12. Connecting block; 13. Reversing plate; 14. Reversing motor; 15. Reversing shaft; 16. Connecting frame; 17. Notch; 18. Cover plate; 19. Rocker arm; 20. Positioning shaft; 21. Arc frame; 22. 23. Ball sleeve; 24. Rolling ball; 25. Swing arm; 26. Slide rod; 27. Fine-tuning electric push rod; 28. Through slot; 29. ​​Fiber laser cladding head; 30. Powder feeding pipe; 31. Powder delivery pipe; 32. Support frame; 33. Adjusting cover; 34. Bracket; 35. Slide cover; 36. Sealing plug; 37. Top rod; 38. Ball bearing; 39. Cam; 40. Baffle; 41. Tension spring; 42. Displacement electric push rod; 43. Cutting tool. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0021] Example 1:

[0022] like Figures 1 to 8 As shown, a die-casting machine cylinder addition and subtraction remanufacturing equipment includes a machine tool 1 and a three-jaw chuck 3 installed at the spindle output end of the spindle box of the machine tool 1. The three-jaw chuck 3 is used to clamp the die-casting machine cylinder.

[0023] A fixed base 4 is slidably mounted on the machine tool 1, and a reversing disk 13 is rotatably mounted on the fixed base 4. A pair of connecting brackets 16 are mounted on the reversing disk 13. One of the connecting brackets 16 is collinear with the axis of the three-jaw chuck 3. A laser cladding component and a boring component are respectively mounted on the two connecting brackets 16. The laser cladding assembly includes a rocker arm 19 rotatably mounted on the side wall of the connecting frame 16. A fiber laser cladding head 28 is mounted on one end of the rocker arm 19, and the distance between the fiber laser cladding head 28 and the rotation center of the rocker arm 19 is smaller than the distance between the other end and the rotation center of the rocker arm 19. This is to ensure that when the top of the rocker arm 19 is pressed against the inner wall of the die-casting machine cylinder, there is a processing distance between the fiber laser cladding head 28 and the die-casting machine cylinder. A deflection assembly for driving the rocker arm 19 to deflect is mounted on the connecting frame 16. A powder lowering pipe 29 is provided on the outer wall of the fiber laser cladding head 28, and a sealing plug 35 is inserted into the inlet of the powder lowering pipe 29. The sealing plug 35 is in contact with the cam mounted on the rotation center of the rocker arm 19. When the rocker arm 19 deflects, the opening and closing of the powder lowering pipe 29 is completed simultaneously. The boring assembly includes a tool 42 mounted on another connecting bracket 16. This structure allows for the independent installation of the additive and subtractive manufacturing components via the independent connecting bracket 16, ensuring that they do not interfere with each other. This high degree of structural integration facilitates the precision boring and finishing of the subsequent cladding layer and guarantees the smoothness of the inner wall of the barrel.

[0024] like Figures 1 to 8 As shown, in a specific embodiment, several pairs of pads 2 are installed at the bottom of the machine tool 1. Anti-slip grooves are provided on the bottom of the pads 2. A slide 5 is installed on the side wall of the fixed base 4. The slide 5 is connected to the transverse feed system on the machine tool 1 and is used to control the horizontal sliding of the slide 5. A controller 6 is installed on the side wall of the slide 5. The controller 6 is used to start and stop the transverse feed system, the laser cladding assembly, and the boring assembly. The anti-slip grooves at the bottom of the pads 2 improve the overall stability of the machine tool 1 and prevent slippage during processing. The slide 5, in conjunction with the transverse feed system, enables precise feed adjustment of the processing components. The controller 6 enables centralized start and stop control of each processing mechanism. The equipment has a high degree of automation, is easy to operate, and has controllable feed accuracy.

[0025] like Figures 1 to 8 As shown, furthermore, an adjustable electric push rod 11 is installed at the bottom of the machine tool 1. A connecting block 12 is installed at the output end of the adjustable electric push rod 11. A support plate 7 is installed on the top of the connecting block 12. A pair of connecting plates 8 are installed on the support plate 7. A drive shaft 9 is rotatably installed on the pair of connecting plates 8, and a positioning roller 10 is installed on the drive shaft 9. The positioning roller 10 is attached to the bottom of the die-casting machine cylinder that has been clamped. The vertical height of the positioning roller 10 can be flexibly adjusted by adjusting the electric push rod 11 to adapt to the support requirements of die-casting machine cylinders of different diameters. The positioning roller 10 can form auxiliary support for the end of the suspended cylinder, effectively offsetting the processing deformation stress and ensuring the coaxiality and structural stability of the cylinder during processing.

[0026] Example 2:

[0027] The difference between the above embodiments and this embodiment is that: Figures 1 to 8As shown, a reversing motor 14 is mounted on the side wall of the fixed base 4, and a reversing shaft 15 is mounted on the output end of the reversing motor 14. The reversing shaft 15 is movably connected to the fixed base 4, and a reversing disc 13 is mounted on the output end of the reversing shaft 15. The reversing motor 14 is used to drive different connecting frames 16 to align with the die-casting machine cylinder. By driving the reversing shaft 15 through the reversing motor 14 to drive the reversing disc 13 to rotate precisely, the automatic and precise switching between the laser cladding station and the boring station can be realized. The alignment accuracy is high, the switching speed is fast, and no manual adjustment of the station is required, which greatly improves the automation processing efficiency of the equipment.

[0028] like Figures 1 to 8 As shown in the specific embodiment, a positioning shaft 20 is installed at the rotation center of the rocker arm 19. The positioning shaft 20 is movably connected to the connecting frame 16. The rotation center of the positioning shaft 20 is connected to the cam 38. The cam 38 is placed in the notch 17 opened in the connecting frame 16, and a cover plate 18 is installed on the notch 17. An arc-shaped frame 21 is installed on the top of the rocker arm 19. A ball sleeve 22 is installed on the arc-shaped frame 21, and a rolling ball 23 is movably embedded in the ball sleeve 22. The rolling ball 23 facilitates contact with the inner wall of the die-casting machine cylinder. The notch 17, together with the cover plate 18, can form a closed protection for the cam 38, preventing dust and impurities from affecting the transmission accuracy. The rolling ball 23 can convert the hard friction between the rocker arm 19 and the inner wall of the cylinder into rolling friction, protecting the cylinder substrate from scratches and improving the processing yield.

[0029] like Figures 1 to 8 As shown, furthermore, a fine-tuning electric push rod 26 is installed on the side wall of the notch 17. A slide rod 25 is installed at the output end of the fine-tuning electric push rod 26. A swing arm 24 is rotatably installed at both ends of the slide rod 25. The end of the swing arm 24 is rotatably connected to the end of the rocker arm 19. A through slot 27 is opened on the connecting frame 16. The slide rod 25 moves through the through slot 27. The rocker arm 19 and the swing arm 24 are arranged in a V-shape. The V-shaped rocker arm 19 and the swing arm 24, together with the fine-tuning electric push rod 26 and the slide rod 25, can realize the micro-precision adjustment of the tilt angle of the rocker arm 19. The adjustment stroke is stable and the accuracy is high. It can be adapted to the precise cladding processing of different wear depths and different areas of the inner wall of the barrel, and the working condition adaptability is stronger.

[0030] Example 3:

[0031] The difference between the above embodiments and this embodiment is that: Figures 1 to 8As shown, an adjusting cover 32 is installed at the inlet of the powder supply pipe 29, and a powder feeding pipe 30 is installed on the top of the adjusting cover 32. The powder feeding pipe 30 is connected to the powder supply source. A support frame 31 is installed on the outer wall of the powder feeding pipe 30, and the support frame 31 is installed on the connecting frame 16. The outlet of the powder supply pipe 29 is aligned with the processing position of the fiber laser cladding head 28. A sliding cover 34 is installed on the side wall of the adjusting cover 32, and a sealing plug 35 is slidably disposed inside the sliding cover 34 and the adjusting cover 32. A bracket 33 is installed on the side wall of the adjusting cover 32, and the bracket 33 is installed on the side wall of the connecting frame 16. The powder feeding pipe 30 and the adjusting cover 32 are fixed as a whole through the support frame 31 and the bracket 33, making the structure stable and not easy to shift. The powder supply pipe 29 is precisely aligned with the cladding processing area, and the sliding cover 34 provides a stable sliding guide for the sealing plug 35, ensuring smooth powder feeding and high powder delivery accuracy.

[0032] like Figures 1 to 8 As shown, in a specific embodiment, a push rod 36 is installed on the side wall of the sealing plug 35. The push rod 36 is in a horizontal state and passes through the sliding cover 34. A ball bearing 37 is installed at the end of the push rod 36. The end of the ball bearing 37 corresponds to the side wall of the cam 38. A baffle 39 is installed on the sealing plug 35. A tension spring 40 is sleeved on the outer side wall of the push rod 36. One end of the tension spring 40 is connected to the baffle 39, and the other end of the tension spring 40 is connected to the side wall of the sliding cover 34. The tension spring 40 is used to drive the ball bearing 37 to always be in contact with the surface of the cam 38. The tension spring 40 is made of 30W4Cr2VA tungsten-chromium-vanadium alloy spring steel, which has excellent high-temperature anti-relaxation and anti-creep properties. It can withstand high-temperature conditions up to 500℃ for a long time, and the elastic decay is minimal under high-temperature conditions. It also has high strength, long fatigue life and good thermal stability, making it suitable for the high-temperature melting and cladding operation environment inside the barrel. It can maintain stable elastic restoring performance for a long time. Through the elastic restoring action of the tension spring 40, the ball 37 always fits the contour of the cam 38, which can realize the precise linkage between the rotation stroke of the cam 38 and the sliding action of the sealing plug 35. The pure mechanical structure replaces the traditional electric control valve, which has excellent high-temperature resistance and can eliminate the problem of electrical component damage and failure under high-temperature conditions. At the same time, it can realize instantaneous powder on / off without residual powder retention.

[0033] like Figures 1 to 8 As shown, furthermore, a shifting electric push rod 41 is mounted on the tool arm of the tool 42. The housing of the shifting electric push rod 41 is mounted on the side wall of another connecting bracket 16, and the tool 42 is a boring tool. The cutting position and cutting depth of the boring tool 42 can be precisely adjusted by the shifting electric push rod 41. The finishing allowance can be flexibly adjusted according to the actual size of the barrel after cladding, adapting to different repair precision requirements, and effectively improving the flatness and dimensional accuracy of the boring and finishing of the inner wall of the barrel.

[0034] The implementation principle of the die-casting machine barrel addition and subtraction remanufacturing equipment of the present invention is as follows: First, the die-casting cylinder to be processed is stably clamped and fixed by the three-jaw chuck 3 at the output end of the spindle box of the machine tool 1. At the same time, the adjusting electric push rod 11 at the bottom of the machine tool 1 can drive the connecting block 12 to move vertically, which drives the positioning roller 10 on the support plate 7, connecting plate 8 and transmission shaft 9 to rise and fall, so that the positioning roller 10 fits tightly against the bottom of the die-casting cylinder, forming auxiliary support for the suspended end of the cylinder, effectively offsetting the deformation stress caused by the cylinder's own weight and processing force, ensuring the coaxiality and stability of the cylinder during processing, and laying the foundation for subsequent material addition and subtraction processing operations.

[0035] The switching of processing modes is accomplished by a reversing mechanism. The reversing motor 14 on the side wall of the fixed base 4 drives the reversing shaft 15 to rotate, which in turn drives the reversing disk 13 to rotate synchronously. Through the rotation of the reversing disk 13, the two sets of connecting frames 16 are respectively aligned with the processing positions of the die-casting machine cylinder, realizing the switching between laser cladding additive processing and boring and cutting processing. The fixed base 4 is connected to the transverse feed system of the machine tool 1 through the slide 5. During operation, the transverse feed system can be started by the controller 6, driving the slide 5 to move the fixed base 4 horizontally, precisely controlling the processing feed position of the laser cladding component and the boring component relative to the die-casting machine cylinder, adapting to the cylinder repair operation needs of different lengths and processing areas.

[0036] During laser cladding additive manufacturing, the reversing motor 14 adjusts the connecting frame 16, which is equipped with the laser cladding component, to be collinear with the three-jaw chuck 3, aligning the fiber laser cladding head 28 with the worn or damaged area on the inner wall of the cylinder. After the equipment moves to the preset processing position, the fine-tuning electric push rod 26 is activated. During operation, the fine-tuning electric push rod 26 can push the slide rod 25 to slide along the through groove 27 of the connecting frame 16, and push and pull the rocker arm 19 through the swing arms 24 hinged at both ends, causing the chevron-shaped rocker arm 19 and the swing arm 24 to deflect at an angle, achieving precise fine-tuning of the tilt angle of the rocker arm 19. The arc-shaped frame 21 at the top of the rocker arm 19 rolls into contact with the inner wall of the die-casting machine cylinder through the ball bearing 23 embedded in the ball sleeve 22. After the compression contact, the movement stops. At this time, the fiber laser cladding head 28 at the other end maintains a constant processing distance with the inner wall of the cylinder, ensuring the uniformity and stability of the cladding process.

[0037] While the rocker arm 19 is deflected and adjusted, the positioning shaft 20 rotates synchronously with the rocker arm 19, causing the cam 38 installed at its rotation center to rotate inside the notch 17 of the connecting frame 16. The cover plate 18 forms a closed protection for the notch 17 to prevent impurities from entering and affecting the transmission accuracy.

[0038] The fiber laser cladding head 28 equipped in this equipment specifically adopts the IC104 precision internal hole laser cladding head. The above is only responsible for focusing the laser beam to complete the melting and cladding of the substrate. It is specially adapted to the high temperature repair of the inner wall of the deep hole of the die casting machine cylinder. In addition, the cladding head adopts a fully enclosed integrated water-cooled optical path design, which can withstand the high temperature heat radiation of cladding and the high temperature environment inside the workpiece for a long time, effectively avoiding problems such as high temperature fogging, lens burns, and optical path deviation damage of conventional processing heads.

[0039] As the cam 38 rotates synchronously with the rocker arm 19, the highest point of the cam 38 gradually disengages from the ball bearing 37. The tension spring 40, which was originally compressed by the push, releases its elastic potential energy, pulling the baffle 39, the push rod 36, and the sealing plug 35 back as a whole. This ensures that the ball bearing 37 always conforms to the contour surface of the cam 38. Thus, according to the rotation stroke of the cam 38 corresponding to the deflection angle of the rocker arm 19, the opening and closing switching and opening degree adjustment of the sealing plug 35 are completed synchronously. This equipment eliminates the traditional electrically controlled valve material control structure and adopts a purely mechanical linkage material cutting structure with the cam 38 and the tension spring 40 working together. Combined with an independent side short-distance powder feeding layout, the powder feeding structure is completely separated from the laser cladding head, which can realize instantaneous powder flow and cut-off, with no residual powder retention in the pipeline. This solves the industry pain points of easy damage to electrically controlled valves, delayed material cutting-off, and residual powder falling off under high-temperature conditions.

[0040] The powder feeding pipe 30 is fixed on the connecting frame 16 by the support frame 31 and connected to the external powder supply source. When the sealing plug 35 retracts with the structure to open the passage, the powder can be accurately and quickly transported to the laser cladding spot area through the adjusting cover 32 and the powder feeding pipe 29, realizing precise side powder feeding in conjunction with laser cladding forming, and realizing integrated linkage control of cladding posture, powder feeding start and stop, and powder feeding dosage.

[0041] After the additive repair of the inner wall of the die-casting cylinder is completed, the reversing motor 14 drives the reversing plate 13 to rotate, switching the connecting frame 16 equipped with the boring component to the machining station, so that the boring tool 42 is aligned with the cladding area of ​​the die-casting cylinder. The tool 42 achieves precise displacement adjustment through the shifting electric push rod 41 connected to the tool arm. According to the dimensional accuracy requirements of the repaired die-casting cylinder, the cutting position and cutting depth of the tool 42 can be finely adjusted to perform boring and finishing of the uneven inner wall surface after laser cladding, removing excess cladding material, correcting the roundness and flatness errors of the inner wall of the die-casting cylinder, and achieving precision subtractive finishing. Throughout the entire processing, the controller 6 uniformly controls the start-stop and operation parameters of the transverse feed system, the laser cladding component, and the boring component, realizing the integrated operation of automated additive repair and precision subtractive finishing of the defective area of ​​the inner wall of the die-casting cylinder, and completing the remanufacturing and repair processing of the die-casting cylinder.

[0042] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 die-casting machine cylinder addition and subtraction remanufacturing equipment, comprising a machine tool (1) and a three-jaw chuck (3) installed at the spindle output end of the spindle box of the machine tool (1), wherein the three-jaw chuck (3) is used to clamp the die-casting machine cylinder, characterized in that: A fixed seat (4) is slidably mounted on the machine tool (1), and a reversing plate (13) is rotatably mounted on the fixed seat (4). A pair of connecting frames (16) are mounted on the reversing plate (13), one of the connecting frames (16) is collinear with the axis of the three-jaw chuck (3), and a laser cladding assembly and a boring assembly are respectively mounted on the two connecting frames (16). The laser cladding assembly includes a rocker arm (19) rotatably mounted on the side wall of the connecting frame (16). One end of the rocker arm (19) is equipped with a fiber laser cladding head (28), and the distance between the fiber laser cladding head (28) and the rotation center of the rocker arm (19) is smaller than the distance between the other end and the rotation center of the rocker arm (19). This is to ensure that when the top of the rocker arm (19) is pressed against the inner wall of the die-casting machine cylinder, there is a processing distance between the fiber laser cladding head (28) and the die-casting machine cylinder. The connecting frame (16) is equipped with a deflection assembly for driving the rocker arm (19) to deflect. The outer wall of the fiber laser cladding head (28) is provided with a powder lowering pipe (29), and a sealing plug (35) is inserted into the inlet of the powder lowering pipe (29). The sealing plug (35) and the cam installed at the rotation center of the rocker arm (19) are in contact with each other. When the rocker arm (19) deflects, the opening and closing of the powder lowering pipe (29) is completed simultaneously. The boring assembly includes a tool (42) mounted on another connecting bracket (16).

2. The die-casting machine cylinder remanufacturing equipment for adding or subtracting materials according to claim 1, characterized in that, The machine tool (1) has several pairs of pads (2) installed at the bottom. The bottom of the pads (2) is provided with anti-slip grooves. The side wall of the fixed seat (4) is equipped with a slide (5). The slide (5) is connected to the transverse feed system on the machine tool (1) and is used to control the horizontal sliding of the slide (5). The side wall of the slide (5) is equipped with a controller (6). The controller (6) is used to start and stop the transverse feed system, the laser cladding assembly and the boring assembly.

3. The die-casting machine cylinder remanufacturing equipment for adding or subtracting materials according to claim 1, characterized in that, The machine tool (1) is equipped with an adjustable electric push rod (11) at the bottom. A connecting block (12) is installed at the output end of the adjustable electric push rod (11). A support plate (7) is installed on the top of the connecting block (12). A pair of connecting plates (8) are installed on the support plate (7). A drive shaft (9) is rotatably installed on the pair of connecting plates (8). A positioning roller (10) is installed on the drive shaft (9). The positioning roller (10) is attached to the bottom of the die-casting machine cylinder that has been clamped.

4. The die-casting machine cylinder remanufacturing equipment for adding or subtracting materials according to claim 1, characterized in that, A reversing motor (14) is installed on the side wall of the fixed base (4). A reversing shaft (15) is installed at the output end of the reversing motor (14). The reversing shaft (15) is movably connected to the fixed base (4). A reversing disc (13) is installed at the output end of the reversing shaft (15). The reversing motor (14) is used to drive different connecting frames (16) to align with the die-casting machine cylinder.

5. The die-casting machine cylinder remanufacturing equipment for adding or subtracting materials according to claim 1, characterized in that, The rocker arm (19) has a positioning shaft (20) installed at its rotation center. The positioning shaft (20) is movably connected to the connecting frame (16). The rotation center of the positioning shaft (20) is connected to the cam (38). The cam (38) is placed in the notch (17) opened in the connecting frame (16). A cover plate (18) is installed on the notch (17). An arc frame (21) is installed on the top of the rocker arm (19). A ball sleeve (22) is installed on the arc frame (21). A ball (23) is movably embedded in the ball sleeve (22). The ball (23) is convenient to contact the inner wall of the die-casting machine cylinder.

6. The die-casting machine cylinder remanufacturing equipment for adding or subtracting materials according to claim 5, characterized in that, A fine-tuning electric push rod (26) is installed on the side wall of the notch (17). A slide rod (25) is installed at the output end of the fine-tuning electric push rod (26). A swing arm (24) is rotatably installed at both ends of the slide rod (25). The end of the swing arm (24) is rotatably connected to the end of the rocker arm (19). A through groove (27) is opened on the connecting frame (16). The slide rod (25) moves through the through groove (27). The rocker arm (19) and the swing arm (24) are in the shape of a V.

7. The die-casting machine cylinder remanufacturing equipment for adding or subtracting materials according to claim 1, characterized in that, An adjustment cover (32) is installed at the inlet of the powder supply pipe (29). A powder feeding pipe (30) is installed on the top of the adjustment cover (32). The powder feeding pipe (30) is connected to the powder supply source. A support frame (31) is installed on the outer wall of the powder feeding pipe (30), and the support frame (31) is installed on the connecting frame (16). The outlet of the powder supply pipe (29) is aligned with the processing position of the fiber laser cladding head (28). A sliding cover (34) is installed on the side wall of the adjustment cover (32). The sealing plug (35) is slidably disposed inside the sliding cover (34) and the adjustment cover (32). A bracket (33) is installed on the side wall of the adjustment cover (32), and the bracket (33) is installed on the side wall of the connecting frame (16).

8. The die-casting machine cylinder remanufacturing equipment for adding or subtracting materials according to claim 7, characterized in that, A push rod (36) is installed on the side wall of the sealing plug (35). The push rod (36) is in a horizontal state and moves through the sliding cover (34). A ball (37) is installed at the end of the push rod (36), and the end of the ball (37) corresponds to the side wall of the cam (38).

9. A die-casting machine cylinder remanufacturing equipment for adding or subtracting materials according to claim 8, characterized in that, A baffle (39) is installed on the sealing plug (35), and a tension spring (40) is sleeved on the outer wall of the push rod (36). One end of the tension spring (40) is connected to the baffle (39), and the other end of the tension spring (40) is connected to the side wall of the slide cover (34). The tension spring (40) is used to drive the ball (37) to always be in contact with the surface of the cam (38).

10. A die-casting machine cylinder remanufacturing equipment for adding or subtracting materials according to claim 1, characterized in that, The tool (42) has a displacement electric push rod (41) mounted on its arm. The outer shell of the displacement electric push rod (41) is mounted on the side wall of another connecting frame (16), and the tool (42) is a boring tool.

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