Multi-station tapping machine for machining castings made of martensitic steel

Abstract

The present application relates to tapping machine technical field, propose a kind of multi-station tapping machine for masteel casting processing, including equipment rack, positioning disc is rotationally arranged on equipment rack, two risers are symmetrically arranged on the top of equipment rack, four stations of feeding and discharging station, drilling station, cleaning station and tapping station are sequentially arranged on equipment rack, still include collecting box, assembly hole, clamping assembly, tapping processing assembly and spray cleaning assembly, collecting box is fixedly arranged in the inside of equipment rack, several assembly holes are evenly angularly opened in the form of circle on positioning disc, several assembly holes are respectively one-to-one corresponding with four stations, clamping assembly is arranged in each assembly hole, tapping processing assembly is arranged in each riser, spray cleaning assembly is arranged on equipment rack, by the above technical solution, the problem that the precision of tapping and the service life of tap are influenced by the insufficient cleaning of hole debris after drilling in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of tapping machine technology, specifically to a multi-station tapping machine for machining malleable iron castings. Background Technology

[0002] Malleable iron castings, also known as malleable cast iron, are made by pouring molten iron with a certain chemical composition into white cast iron billets, followed by annealing. They can be used to manufacture pipe fittings. After special heat treatment, they combine the strength of cast iron with a certain degree of toughness, making them suitable for piping systems that withstand certain pressures. Common malleable iron castings include elbows, tees, and pipe clamps. They are mostly black or dark gray in color and have high strength, plasticity, and impact toughness. When machining malleable iron castings, threads need to be machined into them to connect with other parts that have external threads.

[0003] In practice, drilling and tapping often need to be done on two different machines or at different stations on the same machine. During drilling, debris can easily accumulate on the surface of the workpiece or inside the hole. If this debris is not cleaned in time, it will affect the accuracy of subsequent tapping and may even scratch the machined surface. Although some machines are equipped with spray or rinsing devices, they mostly clean the entire worktable and are not suitable for targeted cleaning of the inside of the hole in the casting, which in turn affects the tapping accuracy and the service life of the tap. Summary of the Invention

[0004] This invention proposes a multi-station tapping machine for machining malleable iron castings, which solves the problem in the prior art where insufficient cleaning of debris inside the hole after drilling affects tapping accuracy and tap life.

[0005] The technical solution of the present invention is as follows: A multi-station tapping machine for machining malleable iron castings includes a machine frame, a positioning plate rotatably mounted on the machine frame, two uprights symmetrically arranged on the top of the machine frame, and four stations sequentially arranged on the machine frame: a loading / unloading station, a drilling station, a cleaning station, and a tapping station. It also includes: A collection box is fixedly installed inside the equipment frame and is located at the bottom of the positioning plate; Assembly holes: The positioning plate has a plurality of assembly holes in a circular shape at equal angles, and the plurality of assembly holes correspond one-to-one with the four workstations. The support ring is coaxially fixed inside each of the assembly holes, and each support ring has several drainage grooves spaced apart in a circular shape. The clamping assembly is provided inside each of the assembly holes to fix the relative position of the malleable iron casting to be processed and the assembly hole. A tapping assembly is provided on each of the uprights for drilling and tapping malleable iron castings; A spray cleaning assembly is installed on the equipment frame and is used to spray the machining position of the malleable iron casting during drilling and tapping, and to clean the drilled holes of the casting after drilling and before tapping. A feeding assembly is disposed inside the collection box and is used to remove the malleable iron casting after tapping from the corresponding assembly hole.

[0006] The collection box contains an assembly cylinder fixedly mounted inside by a bracket. Inside the assembly cylinder is a drive motor fixedly mounted. The output end of the drive motor is coaxially fixedly connected to the bottom of the positioning disk, and is used to drive the positioning disk to rotate at a specified angle.

[0007] To hold the casting to be processed, the clamping assembly includes: The receiving cavity is provided on both sides of each of the assembly holes, and the position of the receiving cavity is higher than the top of the support ring; A first driving component and an arc-shaped clamping frame are provided. The first driving component is fixedly disposed inside each of the accommodating cavities, and an arc-shaped clamping frame is slidably installed inside each of the accommodating cavities. The output end of the first driving component is fixedly connected to the arc-shaped clamping frame.

[0008] For tapping the casting, the tapping assembly includes: A sliding frame is slidably mounted on both of the uprights; The tapping drive unit and the drilling drive unit are provided, wherein the tapping drive unit is disposed on one of the sliding frames and the drilling drive unit is disposed on the other sliding frame; The drilling drive unit has a drill bit at its bottom working end, which is located above the drilling station. The tapping drive unit has a tap at its bottom working end, which is located above the tapping station. A height adjustment mechanism is provided on both of the uprights to adjust the height position of the sliding frame.

[0009] To adjust the height of the sliding frame during tapping or drilling, the height adjustment mechanism includes: The adjusting screw is rotatably mounted on both of the two uprights, and the adjusting nut is threaded onto both adjusting screws. The two adjusting nuts are respectively fixedly connected to the two sliding frames. The adjustment motors are fixedly installed on both of the two uprights, and the output ends of the two adjustment motors are respectively fixedly connected to the two adjustment screws.

[0010] To clean debris from the borehole wall after drilling, the spray cleaning assembly includes: A support frame is fixedly mounted on the equipment frame, and an assembly frame is slidably mounted on the support frame; The second driving component is fixedly mounted on the support frame, and the output end of the second driving component is fixedly connected to the assembly frame. A liquid supply cylinder is fixedly mounted on the assembly frame. The liquid supply cylinder is located above the cleaning station. A liquid distribution frame is coaxially fixedly mounted on the bottom of the liquid supply cylinder. Several liquid supply holes are spaced out in a circular pattern on the liquid distribution frame. Two bamboo-joint tubes are fixedly installed on the equipment frame, and the output ends of the two bamboo-joint tubes point to the drilling station and the tapping station respectively. A liquid supply mechanism is provided inside the equipment frame to supply spray liquid to the liquid supply cylinder and the bamboo joint tube.

[0011] Furthermore, it also includes an outer sleeve and an inner sleeve. The inner sleeve is slidably disposed coaxially inside the outer sleeve. The outer sleeve is fixedly disposed coaxially at the bottom of the liquid supply cylinder. A plurality of springs are arranged circumferentially between the outer sleeve and the inner sleeve. The springs are fixedly connected to the inner top wall of the outer sleeve and the inner bottom wall of the inner sleeve, respectively. An abutment ring is coaxially fixedly provided at the bottom of the inner sleeve, and the abutment ring is used to press the casting.

[0012] Furthermore, a sealing sleeve is coaxially fixed inside the outer sleeve. The sealing sleeve has several arc-shaped guide strips spaced in a circular pattern inside. The bottom of the sealing sleeve has a conical sealing surface, which is adapted to the conical bearing surface inside the inner sleeve.

[0013] To supply the spraying liquid, the liquid supply mechanism includes: A water pump, the input end of which is connected to the collection tank, and the output end of which is connected to a liquid distribution pipe, with a plurality of liquid distribution connectors connected at intervals on the liquid distribution pipe; The liquid supply pipes, the input ends of the two bamboo-joint pipes and the input end of the liquid supply cylinder are all connected to the liquid supply pipes through control valves, and several liquid supply pipes are respectively connected to several liquid distribution connectors. A conical mesh plate is installed inside the collection box.

[0014] To facilitate the blanking of the casting after tapping, the blanking assembly includes: The mounting cylinder is fixedly installed inside the collection box. A pusher is provided on the upper part of the mounting cylinder. The pusher is located at the bottom of the loading and unloading station and can pass through the inner hole of the support ring. The third driving component is installed inside the mounting cylinder, and the output end of the third driving component is fixedly connected to the pusher frame.

[0015] The working principle and beneficial effects of this invention are as follows: 1. In this invention, after drilling is completed, the positioning plate rotates the casting to the cleaning station. During the cleaning process, the liquid supply cylinder is driven to move downward, and the spray liquid is sprayed out from the liquid supply hole of the liquid distribution frame and sprayed onto the drilling position of the casting to perform targeted cleaning of the inside of the drilling, thereby washing away the residual debris inside the drilling. After cleaning, it enters the tapping station for tapping, thereby avoiding the debris from scratching the machined surface during the tapping process, reducing the contact between the tap and hard debris, thereby improving the tapping quality and extending the service life of the tap.

[0016] 2. In this invention, when the outer sleeve is pressed down to the set position, the conical sealing surface and the conical bearing surface fit together to form a seal, and the spray liquid in the supply sleeve cannot leak from the gap between the outer sleeve and the inner sleeve. All the spray liquid is sprayed out from the supply hole and acts on the drilling position. This sealing structure can maintain a high spray pressure, improve the cleaning effect, and the arc-shaped guide strip set inside the sealing sleeve can guide the spray liquid to be evenly distributed, improving the uniformity of spraying. Attached Figure Description

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

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure from another angle in this invention; Figure 3 This is a cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 4 This is a three-dimensional structural schematic diagram with cross-sectional view from another angle in this invention; Figure 5 This is a cross-sectional structural diagram showing the cooperation of the positioning disk, assembly hole, support ring and clamping assembly in this invention. Figure 6 This is a cross-sectional view of the tapping assembly and the spray cleaning assembly used in this invention. Figure 7 This is a schematic diagram of the spray cleaning assembly in this invention; Figure 8 This is a cross-sectional view of the spray cleaning assembly in this invention; Figure 9This is a cross-sectional planar structural diagram of the spray cleaning component in this invention.

[0019] In the diagram: 1. Equipment frame; 2. Positioning plate; 3. Stand; 4. Collection box; 5. Assembly hole; 6. Support ring; 7. Drainage trough; 8. Bracket; 9. Assembly cylinder; 10. Drive motor; 101. Receiving cavity; 102. First driving component; 103. Arc-shaped clamping bracket; 201. Sliding frame; 202. Tapping drive unit; 203. Drilling drive unit; 204. Drill bit; 205. Tap; 206. Adjusting screw; 207. Adjusting nut; 208. Adjusting motor; 301. Support frame; 302. Assembly frame; 303. Second drive component; 304. Liquid supply cylinder; 305. Liquid distribution frame; 306. Liquid supply hole; 307. Bamboo joint tube; 308. Outer sleeve; 309. Inner sleeve; 310. Spring; 311. Abutment ring; 312. Sealing sleeve; 313. Arc-shaped guide strip; 314. Water pump; 315. Liquid distribution pipe; 316. Liquid distribution connector; 317. Liquid supply pipe; 318. Control valve; 319. Conical mesh plate; 401. Mounting cylinder; 402. Pusher frame; 403. Third drive component. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1 to 6As shown in the figure, this embodiment proposes a multi-station tapping machine for machining malleable iron castings, including a machine frame 1, a positioning plate 2 rotatably mounted on the machine frame 1, two uprights symmetrically mounted on the top of the machine frame 1, and four stations arranged sequentially on the machine frame 1: loading / unloading station, drilling station, cleaning station, and tapping station. It also includes a collection box 4, assembly holes 5, a support ring 6, a clamping assembly, a tapping assembly, a spray cleaning assembly, and a loading / unloading assembly. The collection box 4 is fixedly mounted inside the machine frame 1 and is located at the bottom of the positioning plate 2. The positioning plate 2 has several assembly holes 5 formed at equal angles in a circular shape. The assembly holes 5 are respectively... Corresponding to each of the four workstations, each assembly hole 5 has a support ring 6 coaxially fixed inside. Each support ring 6 has several drainage grooves 7 spaced out in a circular pattern. Each assembly hole 5 has a clamping assembly inside to fix the relative position of the malleable iron casting to be processed with the assembly hole 5. An assembly cylinder 9 is fixed inside the collection box 4 via a bracket 8. A drive motor 10 is fixed inside the assembly cylinder 9. The output end of the drive motor 10 is coaxially fixedly connected to the bottom of the positioning disk 2, used to drive the positioning disk 2 to rotate at a specified angle. The clamping assembly includes a receiving cavity 101, a first driving component 102, and an arc-shaped clamping frame 103. Figure 5 As shown, each assembly hole 5 has a receiving cavity 101 on both sides. The receiving cavity 101 is positioned higher than the top of the support ring 6. A first driving member 102 is fixedly installed inside each receiving cavity 101. The first driving member 102 is preferably an electric cylinder. An arc-shaped clamping frame 103 is slidably installed inside each receiving cavity 101. The output end of the first driving member 102 is fixedly connected to the arc-shaped clamping frame 103.

[0022] In actual operation, the casting to be processed is fed into the loading and unloading station by the feeding device, that is, into the assembly hole 5 at the corresponding position on the positioning plate 2. At this time, the casting is supported by the support ring 6. Then, the first driving component 102 is activated to push the arc-shaped clamping frame 103 to move towards the casting. The arc-shaped clamping frame 103 clamps the casting from both sides, and the drive motor 10 can be activated. The drive motor 10 can drive the positioning plate 2 to rotate until the casting is moved to the drilling station.

[0023] The casting entering the drilling station is drilled by the tapping assembly. Then, the positioning plate 2 is driven to rotate again, moving the drilled casting to the cleaning station. After being cleaned by the spray cleaning assembly, the positioning plate 2 is driven to rotate again, moving the drilled casting to the tapping station. The tapping assembly taps the casting. After tapping, the positioning plate 2 is driven to rotate again, moving the drilled casting back to the loading and unloading station. The unloading assembly is then activated to push the tapped casting out of the assembly hole 5, and then the loading device removes it.

[0024] The drain groove 7 on the support ring 6 can drain the cutting fluid and debris generated during the machining process. Most of the cutting fluid and debris fall into the collection box 4 below through the drilled holes on the casting, and some of the cutting fluid and debris enter the collection box 4 below through the drain groove 7.

[0025] Each assembly hole 5 corresponds to a specific workstation. The drive motor 10 is a servo motor that can drive the positioning disk 2 to rotate at a fixed angle. This fixed angle is equal to the angle between two adjacent workstations. After each rotation, each assembly hole 5 can accurately move from one workstation to the next. Multiple workstations can work simultaneously. When the positioning disk 2 stops rotating, the four workstations perform their respective operations: the loading and unloading workstation loads and unloads castings, the drilling workstation drills, the cleaning workstation cleans, and the tapping workstation taps. These four processes do not interfere with each other and form a continuous processing cycle.

[0026] Each support frame 3 is equipped with a tapping assembly for drilling and tapping malleable iron castings. The tapping assembly includes a sliding frame 201, a tapping drive unit 202, a drilling drive unit 203, and a height adjustment mechanism. Figures 1 to 4 As shown, a sliding frame 201 is slidably mounted on each of the two uprights 3. A tapping drive unit 202 is mounted on one of the sliding frames 201, and a drilling drive unit 203 is mounted on the other sliding frame 201. A drill bit 204 is mounted on the working end of the bottom of the drilling drive unit 203, which is located above the drilling station. A tap 205 is mounted on the working end of the bottom of the tapping drive unit 202, which is located above the tapping station. Both uprights 3 are equipped with a height adjustment mechanism for adjusting the height position of the sliding frame 201.

[0027] The tapping drive unit 202 and the drilling drive unit 203 are respectively mounted on two sliding frames 201, and each upright 3 is equipped with a height adjustment mechanism. The height adjustment mechanism is used to drive the sliding frame 201 to slide up and down along the upright 3. When the sliding frame 201 slides up and down, it drives the drill bit 204 or tap 205 to move closer to or away from the malleable iron casting below. Drilling and tapping can be performed simultaneously at different stations without interfering with each other. The action parameters of the two sets of processing components can be adjusted separately, thereby improving the processing flexibility and production efficiency of the equipment. At the same time, the drive unit of each station can be raised and lowered independently, which is convenient to adapt to malleable iron castings of different specifications.

[0028] When the positioning plate 2 rotates the malleable iron casting to the drilling position, the height adjustment mechanism of the drilling drive unit 203 is activated. The adjustment mechanism drives the sliding frame 201 to move downward, and the sliding frame 201 drives the drill bit 204 to descend to the processing position. The drilling drive unit 203 drives the drill bit 204 to rotate and drill the casting. After drilling is completed, the height adjustment mechanism drives the drill bit 204 to retract upward.

[0029] When the casting rotates to the tapping station, the height adjustment mechanism of the tapping drive unit 202 is activated. The adjustment mechanism drives the corresponding sliding frame 201 to move downward. The sliding frame 201 drives the tap 205 to descend to the machining position. The tapping drive unit 202 drives the tap 205 to rotate and tap the hole. After tapping is completed, the height adjustment mechanism drives the tap 205 to retract upward.

[0030] The height adjustment mechanism includes an adjustment screw 206 and an adjustment motor 208, such as Figures 1 to 4 As shown, each of the two uprights 3 is rotatably mounted with an adjusting screw 206, and each of the two adjusting screws 206 is threaded with an adjusting nut 207. The two adjusting nuts 207 are fixedly connected to the two sliding frames 201 respectively. Each of the two uprights 3 is fixedly mounted with an adjusting motor 208, and the output ends of the two adjusting motors 208 are fixedly connected to the two adjusting screws 206 respectively.

[0031] When drilling and tapping are required, the corresponding sliding frame 201 needs to be adjusted to move up and down. At this time, the corresponding adjustment motor 208 is turned on, and the adjustment motor 208 drives the adjustment screw 206 to rotate. As the adjustment screw 206 rotates, the adjustment nut 207 that is threaded to it moves along the axis of the screw, which can drive the sliding frame 201 that is fixedly connected to it to move together.

[0032] The direction of movement of the sliding frame 201 depends on the rotation direction of the adjusting motor 208. When the adjusting motor 208 rotates forward, the sliding frame 201 rises; when the adjusting motor 208 rotates in reverse, the sliding frame 201 falls. As the sliding frame 201 rises or falls, it can drive the drill bit 204 or the tap 205 to move closer to or away from the malleable iron casting below.

[0033] The spray cleaning assembly is mounted on the equipment frame 1 and is used to spray the machining area of ​​the malleable iron casting during drilling and tapping, and to clean the drilled holes of the casting after drilling and before tapping. Figures 6 to 9As shown, the spray cleaning assembly includes a support frame 301, a second drive unit 303, a liquid supply cylinder 304, bamboo-joint tubes 307, and a liquid supply mechanism. The support frame 301 is fixedly mounted on the equipment frame 1, and an assembly frame 302 is slidably mounted on the support frame 301. The second drive unit 303 is fixedly mounted on the support frame 301, and its output end is fixedly connected to the assembly frame 302. The second drive unit 303 is preferably an electric cylinder. The liquid supply cylinder 304 is fixedly mounted on the assembly frame 302 and is located above the cleaning station. A liquid distribution frame 305 is coaxially fixedly mounted at the bottom of the liquid supply cylinder 304. The liquid distribution frame 305 has several liquid supply holes 306 spaced out in a circular pattern. Two bamboo-joint tubes 307 are fixedly mounted on the equipment frame 1, and their output ends point to the drilling station and the tapping station, respectively. A liquid supply mechanism is provided inside the equipment frame 1 for supplying liquid to the equipment. The liquid cylinder 304 and the bamboo joint tube 307 supply spray liquid. It also includes an outer sleeve 308, an inner sleeve 309, and an abutment ring 311. The inner sleeve 309 is coaxially slidably disposed inside the outer sleeve 308. The outer sleeve 308 is coaxially fixedly disposed at the bottom of the liquid supply cylinder 304. Several springs 310 are arranged circumferentially between the outer sleeve 308 and the inner sleeve 309. The springs 310 are fixedly connected to the inner top wall of the outer sleeve 308 and the inner bottom wall of the inner sleeve 309, respectively. An abutment ring 311 is coaxially fixedly disposed at the bottom of the inner sleeve 309. The abutment ring 311 is used to press the casting. A sealing sleeve 312 is coaxially fixedly disposed inside the outer sleeve 308. Several arc-shaped guide strips 313 are arranged circumferentially at intervals inside the sealing sleeve 312. A conical sealing surface is provided at the bottom of the sealing sleeve 312. The conical sealing surface at the bottom of the sealing sleeve 312 is adapted to the conical bearing surface inside the inner sleeve 309.

[0034] When the drilled holes of the casting moved to the cleaning station need to be cleaned, the second drive unit 303 is activated to drive the liquid supply cylinder 304 downward through the assembly frame 302. At this time, the outer sleeve 308 and the sealing sleeve 312 move downward together with the liquid supply cylinder 304. The abutment ring 311 first contacts the upper surface of the malleable iron casting. At this time, the liquid supply cylinder 304 continues to move downward, and the outer sleeve 308 continues to press down. At this time, the inner sleeve 309 slides upward relative to the outer sleeve 308, and the spring 310 is compressed. The elastic force of the spring 310 is transmitted to the abutment ring 311 through the inner sleeve 309. The abutment ring 311 presses the malleable iron casting tightly inside the assembly hole 5, which can prevent the casting from shifting due to the impact of the high-pressure spray liquid.

[0035] like Figure 9As shown, (in this state, the bottom of the sealing sleeve 312 is not connected to the inside of the inner sleeve 309). When the outer sleeve 308 is pressed down to the set position, the conical sealing surface at the bottom of the sealing sleeve 312 fits into the conical bearing surface inside the inner sleeve 309. After the two fit together, a seal is formed, and the spray liquid in the liquid supply cylinder 304 cannot leak from the gap between the outer sleeve 308 and the inner sleeve 309. This ensures that all the sprayed liquid is sprayed out from the drilling position, improving the spray pressure and cleaning effect. The spray liquid is sprayed out from the liquid supply hole 306 of the liquid distribution frame 305 and sprayed onto the drilling position of the casting. During this process, after being guided by the arc-shaped guide strip 313, it can flow more evenly to the liquid supply hole 306. This can improve the uniformity of spraying. After cleaning, the second drive unit 303 is activated to drive the liquid supply cylinder 304 to move upward. The spring 310 gradually returns to its original state, the inner sleeve 309 slides downward relative to the outer sleeve 308, and the abutment ring 311 disengages from the upper surface of the casting.

[0036] With the two bamboo-joint tubes 307, the output ends of the two tubes 307 point to the drilling station and the tapping station respectively. The liquid supply mechanism simultaneously supplies spray liquid to the liquid supply cylinder 304 and the bamboo-joint tubes 307. The bamboo-joint tubes 307 can be freely bent and their angles adjusted. The operator can adjust the spray direction of the bamboo-joint tubes 307 as needed. The bamboo-joint tubes 307 continuously spray spray liquid onto the processing position during drilling and tapping. The spray liquid serves to cool and lubricate.

[0037] The liquid supply mechanism includes a water pump 314, a liquid supply pipe 317, and a conical mesh plate 319, such as Figure 6 , Figure 7 As shown, the input end of the water pump 314 is connected to the collection tank 4, and the output end of the water pump 314 is connected to the liquid distribution pipe 315. Several liquid distribution connectors 316 are connected to the liquid distribution pipe 315 at intervals. The input ends of the two bamboo joint pipes 307 and the input end of the liquid supply cylinder 304 are all connected to the liquid supply pipes 317 through the control valve 318. Several liquid supply pipes 317 correspond to and are connected to several liquid distribution connectors 316 one by one. A conical mesh plate 319 is installed inside the collection tank 4.

[0038] When spraying liquid is needed, water pump 314 is turned on to draw spraying liquid from collection tank 4. The spraying liquid passes through distribution pipe 315 and supply pipe 317 to reach the spraying end of each station. The bamboo joint pipe 307 continuously sprays spraying liquid during drilling and tapping. The supply cylinder 304 sprays spraying liquid in a concentrated manner at the cleaning station. The debris generated during the processing mixes with the spraying liquid and flows into collection tank 4. When the spraying liquid passes through the conical mesh plate 319, the debris is intercepted above the mesh plate. The filtered spraying liquid passes through the mesh plate and flows into the bottom of collection tank 4.

[0039] Among them, the control valve 318 is used to control the opening and closing of the liquid supply pipe 317. When the drilling station needs to be sprayed, the control valve 318 corresponding to the bamboo joint pipe 307 is opened. When the tapping station needs to be sprayed, the control valve 318 of the other bamboo joint pipe 307 is opened. When the cleaning station needs to be sprayed, the control valve 318 of the liquid supply cylinder 304 is opened. The three control valves 318 can be controlled independently or opened simultaneously.

[0040] The feeding assembly is located inside the collection box 4 and is used to remove the malleable iron castings after tapping from the corresponding assembly holes 5, such as... Figure 3 , Figure 4 As shown, the unloading assembly includes an installation cylinder 401 and a third drive component 403. The installation cylinder 401 is fixedly installed inside the collection box 4. A pusher frame 402 is installed on the upper part of the installation cylinder 401. The pusher frame 402 is located at the bottom of the unloading station. The pusher frame 402 can pass through the inner hole of the support ring 6. The third drive component 403 is installed inside the installation cylinder 401. The output end of the third drive component 403 is fixedly connected to the pusher frame 402. The third drive component 403 is preferably an electric cylinder.

[0041] When the positioning plate 2 rotates the tapped malleable iron casting to the loading / unloading station, the pusher 402 is located directly below the casting. The third drive unit 403 is activated, pushing the pusher 402 upwards. The pusher 402 passes through the inner hole of the support ring 6 and continues to push upwards after contacting the bottom of the malleable iron casting until it is ejected from the assembly hole 5. The finished casting is then removed from above the positioning plate 2 by the loading device. Subsequently, the third drive unit 403 reverses its movement, causing the pusher 402 to move downwards. The pusher 402 returns to its initial position, and the positioning plate 2 can continue rotating for the next cycle.

[0042] In actual operation, the casting to be processed is fed into the loading and unloading station by the feeding device, that is, into the assembly hole 5 at the corresponding position on the positioning plate 2. At this time, the casting is supported by the support ring 6. Then, the first driving component 102 is activated to push the arc-shaped clamping frame 103 to move towards the casting. The arc-shaped clamping frame 103 clamps the casting from both sides, and the drive motor 10 can be activated. The drive motor 10 can drive the positioning plate 2 to rotate until the casting is moved to the drilling station.

[0043] After the casting arrives at the drilling station, the adjustment motor 208 corresponding to the drilling drive unit 203 is turned on. The adjustment motor 208 drives the adjustment screw 206 to rotate. As the adjustment screw 206 rotates, the adjustment nut 207, which is threaded to it, moves along the axis of the screw, which in turn drives the sliding frame 201, which is fixedly connected to it, to move together. Thus, the casting is drilled by the drill bit 204. During the drilling process, the bamboo tube 307 pointing to the drilling station continuously sprays spray liquid. After the drilling is completed, the drill bit 204 is retracted.

[0044] After drilling is completed, the drive positioning plate 2 rotates, moving the drilled casting to the cleaning station. At this time, the second drive component 303 is activated to push the assembly frame 302 to slide downward. The assembly frame 302 drives the liquid supply cylinder 304 to move downward. The liquid supply cylinder 304 drives the outer sleeve 308 and the sealing sleeve 312 to move downward together. At this time, the abutment ring 311 first contacts the upper surface of the casting. The liquid supply cylinder 304 continues to move downward, and the outer sleeve 308 continues to press down. At this time, the inner sleeve 309 slides upward relative to the outer sleeve 308, and the spring 310 is compressed. The elastic force of the spring 310 is transmitted to the abutment ring 311 through the inner sleeve 309. The abutment ring 311 presses the malleable iron casting tightly inside the assembly hole 5, which can prevent the casting from shifting due to the impact of the high-pressure spray liquid.

[0045] When the outer sleeve 308 is pressed down to the set position, the conical sealing surface at the bottom of the sealing sleeve 312 fits into the conical bearing surface inside the inner sleeve 309. After the two fit together, a seal is formed, and the spray liquid in the supply cylinder 304 cannot leak from the gap between the outer sleeve 308 and the inner sleeve 309. This ensures that all the sprayed spray liquid is sprayed out from the drilling position, improving the spray pressure and cleaning effect. The spray liquid is sprayed out from the supply hole 306 of the liquid distribution frame 305 and sprayed onto the drilling position of the casting. During this process, after being guided by the arc-shaped guide strip 313, it can flow more evenly to the supply hole 306, which can improve the uniformity of spraying. After cleaning is completed, the second drive component 303 is activated to drive the supply cylinder 304 to move upward. The spring 310 gradually returns to its original state, and the inner sleeve 309 slides downward relative to the outer sleeve 308, and the abutment ring 311 disengages from the upper surface of the casting.

[0046] After cleaning, the drive positioning plate 2 rotates, moving the drilled casting to the tapping station. Once the casting reaches the tapping station, the adjustment motor 208 corresponding to the tapping drive unit is turned on. The adjustment motor 208 drives the adjustment screw 206 to rotate. As the adjustment screw 206 rotates, the adjustment nut 207, which is threaded to it, moves along the axis of the screw, thereby moving the sliding frame 201, which is fixedly connected to it, together. This allows the tap 205 to drill the casting. During the drilling process, the bamboo tube 307 pointing to the tapping station continuously sprays spray liquid. After tapping is completed, the tap 205 is retracted.

[0047] After tapping is completed, the drive positioning plate 2 rotates, causing the tapped casting to return to the loading / unloading station. Once the casting returns, the third drive component 403 is activated, pushing the pusher frame 402 upwards. The pusher frame 402 passes through the inner hole of the support ring 6 until it contacts the bottom of the casting, then continues to push upwards, ejecting the casting from the assembly hole 5. The loading device can then remove the finished casting from above the positioning plate 2. Subsequently, the third drive component 403 reverses its movement, causing the pusher frame 402 to move downwards. The pusher frame 402 then returns to its initial position.

[0048] During the processing, the cutting fluid and debris generated flow downwards into the collection tank 4. Most of the cutting fluid and debris fall directly into the collection tank 4 through the drilled holes on the casting. Some of the cutting fluid and debris enter the collection tank 4 through the drainage groove 7 on the support ring 6. The water pump 314 delivers the spray liquid to each spray end through the distribution pipe 315 and the supply pipe 317. When the spray liquid passes through the conical mesh plate 319, the debris is intercepted above the mesh plate. The filtered spray liquid passes through the mesh plate and flows into the bottom of the collection tank 4, realizing recycling.

[0049] The above are merely preferred embodiments of the present invention and are 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 multi-station tapping machine for machining malleable iron castings, comprising a machine frame (1), wherein a positioning plate (2) is rotatably mounted on the machine frame (1), and two uprights (3) are symmetrically arranged on the top of the machine frame (1), characterized in that, The equipment frame (1) is provided with four stations in sequence: loading and unloading station, drilling station, cleaning station, and tapping station. It also includes: Collection box (4), the collection box (4) is fixedly installed inside the equipment frame (1), and the collection box (4) is located at the bottom of the positioning plate (2); Assembly holes (5): The positioning plate (2) has a plurality of assembly holes (5) in a circular shape at equal angles, and the plurality of assembly holes (5) correspond one-to-one with the four work stations. Support ring (6), each of the assembly holes (5) is coaxially fixedly provided with the support ring (6), and each of the support rings (6) is provided with a number of drainage grooves (7) spaced in a circular shape. Clamping assembly, each of the assembly holes (5) is provided with the clamping assembly, which is used to fix the relative position of the malleable iron casting to be processed and the assembly hole (5); Each of the uprights (3) is equipped with a tapping assembly for drilling and tapping malleable iron castings; The spray cleaning assembly is installed on the equipment frame (1) and is used to spray the processing position of the malleable iron casting during drilling and tapping, and to clean the drilling hole of the casting after drilling and before tapping. The unloading assembly is located inside the collection box (4) and is used to remove the malleable iron casting after tapping from the corresponding assembly hole (5).

2. The multi-station tapping machine for machining malleable iron castings according to claim 1, characterized in that, The collection box (4) is fixedly provided with an assembly cylinder (9) by a bracket (8). The assembly cylinder (9) is fixedly provided with a drive motor (10). The output end of the drive motor (10) is coaxially fixedly connected to the bottom of the positioning disk (2) to drive the positioning disk (2) to rotate at a specified angle.

3. The multi-station tapping machine for machining malleable iron castings according to claim 1, characterized in that, The clamping assembly includes: The receiving cavity (101) is provided on both sides of each of the assembly holes (5), and the position of the receiving cavity (101) is higher than the top of the support ring (6); The first driving member (102) and the arc-shaped clamping frame (103) are fixedly arranged inside each of the accommodating cavities (101), and the arc-shaped clamping frame (103) is slidably installed inside each of the accommodating cavities (101). The output end of the first driving member (102) is fixedly connected to the arc-shaped clamping frame (103).

4. A multi-station tapping machine for machining malleable iron castings according to claim 1, characterized in that, The tapping assembly includes: Sliding frame (201), the sliding frame (201) is slidably arranged on both of the uprights (3); A tapping drive unit (202) and a drilling drive unit (203), wherein the tapping drive unit (202) is disposed on one of the sliding frames (201) and the drilling drive unit (203) is disposed on the other sliding frame (201); The bottom working end of the drilling drive unit (203) is provided with a drill bit (204), which is located above the drilling station. The bottom working end of the tapping drive unit (202) is provided with a tap (205), which is located above the tapping station. Height adjustment mechanism: Both of the two uprights (3) are equipped with the height adjustment mechanism, which is used to adjust the height position of the sliding frame (201).

5. A multi-station tapping machine for machining malleable iron castings according to claim 4, characterized in that, The height adjustment mechanism includes: Adjustment screw (206), the adjustment screw (206) is rotatably installed on both of the two uprights (3), the adjustment screw (206) is threaded with adjustment nut (207), the two adjustment nuts (207) are fixedly connected to the two sliding frames (201) respectively; The position adjustment motor (208) is fixedly installed on both of the two uprights (3), and the output ends of the two position adjustment motors (208) are fixedly connected to the two position adjustment screws (206) respectively.

6. A multi-station tapping machine for machining malleable iron castings according to claim 1, characterized in that, The spray cleaning assembly includes: A support frame (301) is fixedly mounted on the equipment frame (1), and an assembly frame (302) is slidably mounted on the support frame (301). The second driving component (303) is fixedly mounted on the support frame (301), and the output end of the second driving component (303) is fixedly connected to the assembly frame (302); Liquid supply cylinder (304), the liquid supply cylinder (304) is fixedly installed on the assembly frame (302), the liquid supply cylinder (304) is located at the upper part of the cleaning station, and a liquid distribution frame (305) is coaxially fixedly installed at the bottom of the liquid supply cylinder (304), and a plurality of liquid supply holes (306) are spaced apart in a circular shape on the liquid distribution frame (305). Two bamboo tubes (307) are fixedly installed on the equipment frame (1), and the output ends of the two bamboo tubes (307) point to the drilling station and the tapping station respectively. The equipment frame (1) is equipped with a liquid supply mechanism for supplying spray liquid to the liquid supply cylinder (304) and the bamboo tube (307).

7. A multi-station tapping machine for machining malleable iron castings according to claim 6, characterized in that, It also includes an outer sleeve (308) and an inner sleeve (309). The inner sleeve (309) is coaxially slidably disposed inside the outer sleeve (308). The outer sleeve (308) is coaxially fixedly disposed at the bottom of the liquid supply cylinder (304). A plurality of springs (310) are arranged circumferentially between the outer sleeve (308) and the inner sleeve (309). The springs (310) are fixedly connected to the inner top wall of the outer sleeve (308) and the inner bottom wall of the inner sleeve (309), respectively. Abutting ring (311) is coaxially fixed at the bottom of the inner sleeve (309), and the abutting ring (311) is used to press the casting.

8. A multi-station tapping machine for machining malleable iron castings according to claim 7, characterized in that, A sealing sleeve (312) is coaxially fixed inside the outer sleeve (308). Several arc-shaped guide strips (313) are arranged in a circular pattern inside the sealing sleeve (312). A conical sealing surface is provided at the bottom of the sealing sleeve (312). The conical sealing surface at the bottom of the sealing sleeve (312) is adapted to the conical bearing surface inside the inner sleeve (309).

9. A multi-station tapping machine for machining malleable iron castings according to claim 8, characterized in that, The liquid supply mechanism includes: A water pump (314) is connected to the collection tank (4) at its input end and to the output end of the water pump (314) via a liquid distribution pipe (315). Several liquid distribution connectors (316) are connected to the liquid distribution pipe (315) at intervals. The liquid supply pipe (317), the input ends of the two bamboo joint pipes (307) and the input end of the liquid supply cylinder (304) are all connected to the liquid supply pipe (317) through the control valve (318), and several liquid supply pipes (317) are respectively connected to several liquid distribution connectors (316). Conical mesh plate (319), the conical mesh plate (319) is installed inside the collection box (4).

10. A multi-station tapping machine for machining malleable iron castings according to claim 1, characterized in that, The feeding assembly includes: The mounting cylinder (401) is fixedly installed inside the collection box (4). A pusher (402) is provided on the upper part of the mounting cylinder (401). The pusher (402) is located at the bottom of the loading and unloading station. The pusher (402) can pass through the inner hole of the support ring (6). The third driving component (403) is installed inside the mounting cylinder (401), and the output end of the third driving component (403) is fixedly connected to the pusher frame (402).

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