A sand mold vent cleaning device and cleaning method

Abstract

This invention relates to the field of intelligent sand casting technology, providing a sand mold vent hole cleaning device and method. The automatic cleaning device includes an inner support frame, an outer support frame, an X / Y / Z-axis shifting mechanism, an air blowing pipe assembly, and a compressed air generator. A roller conveyor assembly is installed on the inner support frame, along which the sand box of the sand mold to be cleaned moves. After the sand mold vent holes are drilled, the sand box is moved to the inner support frame, and the air blowing pipe assembly is automatically inserted into each vent hole sequentially by the X, Y, and Z-axis shifting mechanisms to clean residual sand, resulting in high cleaning efficiency. This invention also utilizes a first weighing unit at the drilling station and a second weighing unit at the cleaning station to calculate the drilling and cleaning quality through weight differences, enabling online automatic monitoring of the sand mold vent hole cleaning effect, improving the level of intelligent sand casting, and ensuring casting quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sand mold intelligent casting, in particular to a sand mold exhaust hole cleaning device and a cleaning method. BACKGROUND

[0002] In the sand mold casting industry, exhaust holes are drilled in the sand mold after sand molding to ensure that the air stored in the sand mold is smoothly discharged during the casting process, preventing the quality of the castings from being affected. However, after drilling the exhaust holes in the sand mold, residual sand will be left in the holes. The inclusion of residual sand in the castings produced by pouring will produce some undesirable or scrap products, seriously affecting the production efficiency and casting quality of the enterprise. Currently, the residual sand in the exhaust holes is basically manually blown off at the orifice of the exhaust hole using an air gun, which has low work efficiency, and the residual sand in the deep part of the exhaust hole cannot be effectively cleaned. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide a sand mold exhaust hole cleaning device and a cleaning method.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present application to solve its technical problems is: a sand mold exhaust hole cleaning device, comprising:

[0005] An inner support frame is provided with a rolling track assembly, and the sand box of the sand mold to be cleaned moves along the rolling track assembly;

[0006] An outer support frame is arranged around the inner support frame and spans the inner support frame left and right, and the top of the outer support frame is fixedly connected with a frame-shaped connecting frame;

[0007] An X-direction displacement mechanism includes an X-direction left guide rail, an X-direction right guide rail, an X-direction displacement plate, and an X-direction displacement driving mechanism. The X-direction left guide rail and the X-direction right guide rail are installed on the frame-shaped connecting frame, and both are arranged in parallel with the moving direction of the sand box. The X-direction displacement plate is slidably installed at both ends of the X-direction left guide rail and the X-direction right guide rail, and the X-direction displacement driving mechanism drives the X-direction displacement plate to move in the X-direction;

[0008] A Y-direction displacement mechanism includes a Y-direction guide rail, a Y-direction displacement frame, and a Y-direction displacement driving mechanism. The Y-direction guide rail is fixedly installed on the X-direction displacement plate, and the length direction of the Y-direction guide rail is perpendicular to the moving direction of the sand box. The Y-direction displacement frame is slidably installed on the Y-direction guide rail, and the Y-direction displacement driving mechanism drives the Y-direction displacement frame to move in the Y-direction;

[0009] The Z-axis displacement mechanism includes a vertical mounting plate, a Z-axis guide rail, a Z-axis slider, and a Z-axis displacement drive mechanism. The vertical mounting plate is fixedly connected to the Y-axis displacement frame. The Z-axis guide rail is vertically fixed on the vertical mounting plate. The Z-axis slider is slidably mounted on the Z-axis guide rail. The Z-axis displacement drive mechanism drives the Z-axis slider to move in the Z-axis direction.

[0010] An air blowing tube assembly, which is vertically mounted on the Z-axis slider;

[0011] A compressed air generator, the outlet of which is connected to the air blowing pipe assembly via a pipeline.

[0012] Using the technical solution of this invention, after the sand mold vent holes are drilled, the sand box to be cleaned is moved to the inner support frame. The X-axis displacement mechanism, Y-axis displacement mechanism and Z-axis displacement mechanism automatically drive the air blowing pipe assembly to extend into each vent hole in sequence to blow air and clean the residual sand. The cleaning efficiency is high and the quality of the casting is effectively ensured.

[0013] Furthermore, the air blowing tube assembly includes a guide block, an air blowing tube, and a compression spring. The guide block is fixed to the vertical mounting plate. The air blowing tube is a slender hollow tube. The upper part of the air blowing tube passes through a first guide hole on the Z-axis slider. A limiting nut is provided on the outer periphery of the middle position of the air blowing tube. The lower part of the air blowing tube passes through a second guide hole in the guide block. The compression spring is sleeved on the upper part of the air blowing tube. The two ends of the compression spring abut against the Z-axis slider and the limiting nut, respectively.

[0014] By adopting the above-mentioned preferred scheme, the downward verticality of the air blowing pipe can be effectively ensured. When the air blowing pipe collides with the sand mold due to misalignment with the exhaust hole, the air blowing pipe can be pressed up to prevent damage to the sand mold. At the same time, a position detection sensor can be set on the side of the Z-guide rail corresponding to the upper and lower limit positions of the Z-axis slider. The position detection sensor is also perpendicular to the axis of the air blowing pipe. This can work with the position detection sensor to detect whether the air blowing pipe has successfully entered the sand mold exhaust hole. After realignment, the compression spring can cause the air blowing pipe to return to its original position.

[0015] Furthermore, the lower end face of the air blowing pipe is a conical surface, and air outlets are arranged in a circumferential array on the lower end face of the air blowing pipe, with the air outlets arranged obliquely downward from the inside out.

[0016] By adopting the above-mentioned preferred scheme, the ability of the air blowing pipe to clean residual sand in the exhaust hole is improved.

[0017] Furthermore, the inner support frame includes a left support and a right support, the raceway assembly includes a left roller group and a right roller group, the left roller group includes a plurality of left rollers, each left roller is rotatably mounted on the left support, and the right roller group includes a plurality of right rollers, each right roller is rotatably mounted on the right support.

[0018] Furthermore, both the left and right rollers include a first cylindrical portion, a second cylindrical portion, and a third cylindrical portion arranged sequentially from the head end to the tail end. The outer diameter of the second cylindrical portion is larger than the outer diameter of the first cylindrical portion, and the outer diameter of the second cylindrical portion is also larger than the outer diameter of the third cylindrical portion. The third cylindrical portion of the left roller is rotatably mounted on the left support, and the third cylindrical portion of the right roller is rotatably mounted on the right support. The lower corners of the left and right sides of the sand box to be cleaned are right angles, and the bottom surfaces of the left and right sides of the sand box are horizontal contact surfaces. The width of the horizontal contact surface is greater than the length of the first cylindrical portion. The bottom surfaces of the left and right sides of the sand box press against the first cylindrical portion of the left roller and the first cylindrical portion of the right roller, respectively.

[0019] Furthermore, it also includes a sand box side-pushing mechanism, which includes a support plate, a push shaft, and a push cylinder. The support plate is fixed on the left or right bracket, the cylinder body of the push cylinder is fixed on the support plate, the push shaft is mounted on the piston rod of the push cylinder, and the end of the push shaft matches the positioning hole on the side wall of the sand box.

[0020] By adopting the above-mentioned preferred solution, the sand box on the raceway assembly can be positioned quickly, ensuring that the air blowing pipe and the exhaust port are accurately aligned.

[0021] Furthermore, the X-axis shifting drive mechanism includes a geared motor, a drive shaft, a left driving wheel, a left driven wheel, a right driving wheel, a right driven wheel, a left drive belt, and a right drive belt. The base of the geared motor is fixedly mounted on the frame-type connecting frame. The drive shaft is rotatably mounted on the frame-type connecting frame and is drively connected to the output shaft of the geared motor. The left driving wheel and the right driving wheel are respectively mounted on the left and right ends of the drive shaft. The left driven wheel and the right driven wheel are respectively rotatably mounted on the left and right side plates of the frame-type connecting frame. The left drive belt is wound between the left driving wheel and the left driven wheel, and the right drive belt is wound between the right driving wheel and the right driven wheel. The left end of the X-axis shifting plate is connected to the left drive belt, and the right end of the X-axis shifting plate is connected to the right drive belt.

[0022] Furthermore, the Y-axis shifting drive mechanism includes a first motor, a first driving wheel, a first driven wheel, and a first transmission belt. The base of the first motor is fixedly mounted on the X-axis shifting plate. The first driving wheel and the first driven wheel are rotatably mounted on the left and right ends of the X-axis shifting plate, respectively. The first driving wheel is drivenly connected to the output shaft of the first motor. The first transmission belt is wound between the first driving wheel and the first driven wheel. The Y-axis shifting frame is connected to the first transmission belt.

[0023] Furthermore, the Z-axis displacement drive mechanism includes a second motor, a second driving wheel, a second driven wheel, and a second transmission belt. The base of the second motor is fixedly mounted on the vertical mounting plate. The second driven wheel and the second driving wheel are rotatably mounted on the upper and lower ends of the vertical mounting plate, respectively. The second driving wheel is connected to the output shaft of the second motor. The second transmission belt is wound between the second driving wheel and the second driven wheel. The Z-axis slider is connected to the second transmission belt.

[0024] By adopting the above-mentioned preferred solution, the overall weight of the shifting mechanism can be effectively reduced through the belt drive mechanism, ensuring smooth and rapid operation.

[0025] Furthermore, multiple flat air nozzles arranged in a row are installed on the front side of the frame-shaped connecting frame, with the arrangement direction of the multiple flat air nozzles perpendicular to the direction of movement of the sand box.

[0026] By adopting the above-mentioned preferred solution, the flat air nozzle can clean the residual loose sand on the surface of the sand mold, ensuring the overall cleaning effect of the sand mold.

[0027] Furthermore, the inner support frame is sequentially equipped with a drilling station and a cleaning station.

[0028] A drilling device, a first dust collection hood unit, and a first weighing unit are provided below the sand box at the drilling station. The drilling device is used to drill multiple vent holes in the sand mold at the drilling station. The first dust collection hood unit is used to collect the debris generated during drilling the vent holes. The first weighing unit is used to weigh the sand box and sand mold before drilling the vent holes and to weigh the sand box and sand mold after drilling the vent holes.

[0029] The cleaning station is located above the sand box and is equipped with a cleaning module. The cleaning station is located below the sand box and is equipped with a second dust collection hood unit and a second weighing unit. The cleaning module is used to perform the first purging of the vent holes drilled on the sand mold. The second dust collection hood unit is used to collect the debris generated by the first purging of the vent holes. The second weighing unit is used to weigh the sand box and sand mold after the first purging of the vent holes.

[0030] Furthermore, both the first dust collection hood unit and the second dust collection hood unit include an outer cover, an outer cover lifting drive mechanism, and a debris collection and extraction mechanism. The upper end of the outer cover is open and matches the lower outer edge of the sand box. The outer cover lifting drive mechanism is used to drive the outer cover to move up and down so as to achieve the contact and separation of the outer cover with the sand box. The debris collection and extraction mechanism is used to absorb and collect the debris that falls into the outer cover.

[0031] Furthermore, both the first and second weighing units include an electronic weighing instrument, a front lifting mechanism, a rear lifting mechanism, a front guide sleeve, and a rear guide sleeve; a front guide post is provided on the front side of the bottom surface of the sand box frame, and a rear guide post is provided on the rear side; the front lifting mechanism and the rear lifting mechanism are respectively installed on the front and rear sides of the upper surface of the electronic weighing instrument, the front guide sleeve is installed on the top of the front lifting mechanism, and the rear guide sleeve is installed on the top of the rear lifting mechanism; during weighing, the front lifting mechanism drives the front guide sleeve to rise and cooperate with the front guide post, and the rear lifting mechanism drives the rear guide sleeve to rise and cooperate with the rear guide post, so that the sand box and sand mold are disengaged from the roller assembly, and the electronic weighing instrument weighs the sand box and sand mold.

[0032] A method for cleaning sand mold vent holes includes the following steps:

[0033] Step 1: When the sand box is moved to the drilling position, the total weight of the sand box and sand mold is weighed by the first weighing unit as G0.

[0034] Step 2: The first integrated cover unit is connected to the sand box, and the drilling device is turned on to drill multiple vent holes in the sand mold in sequence;

[0035] Step 3: After the vent hole is drilled, weigh the sand box and sand mold again through the first weighing unit to get the total weight G1.

[0036] Step 4: Calculate the amount of debris removed by drilling Δ1 = G0 - G1, and compare Δ1 with the set value; when Δ1 is greater than the maximum set value Sm, stop the machine and check whether the sand mold is damaged; when Δ1 is less than the minimum set value Sn, replace the drill bit of the drilling device, and repeat steps 2-4 after replacing the new drill bit; when Sn≤Δ1≤Sm, move the sand box to the cleaning station.

[0037] Step 5: After the sand box is moved to the cleaning station, the second dust collection hood unit is connected to the sand box, the cleaning module is turned on, and air is blown to clean each exhaust hole.

[0038] Step 6: After the cleaning module is cleaned, weigh the total weight of the sand box and sand mold using the second weighing unit to obtain G2.

[0039] Step 7: Calculate the amount of debris removed by the cleaning module Δ2 = G1 - G2; compare the actual total amount of debris removed from the vent hole Δ1 + Δ2 with the standard weight value Sk of the debris removed from the vent hole; when a% ≤ (Δ1 + Δ2) / (Sk * t) ≤ b%, the cleaning is complete, where a is the lower limit of allowable value, 90 < a < 100, b is the upper limit of allowable value, 100 < b < 110, and t is the tool life correction value, 0.9 ≤ t ≤ 1, the value of t is gradually reduced according to the tool usage time; when (Δ1 + Δ2) / ( When (Sk*t) > b%, stop the machine and check for any defects in the sand mold; when (Δ1+Δ2) / (Sk*t) < a%, repeat steps 5-7. During the next cleaning, the airflow of the cleaning module and the lifting speed of the air pipe assembly are adjusted according to the value of (Δ1+Δ2) / (Sk*t). The smaller the value of (Δ1+Δ2) / (Sk*t), the larger the airflow of the cleaning module and the faster the lifting speed of the air pipe assembly.

[0040] Step 8: If (Δ1+Δ2) / (Sk*t) is still less than a% after the cleaning module cleans the same sand mold twice, then stop the machine for maintenance.

[0041] By adopting the above-mentioned preferred scheme, and with the help of the first weighing unit of the drilling station and the second weighing unit of the cleaning station, the drilling and cleaning quality can be calculated by the weight difference. This enables online automatic monitoring of the cleaning effect of sand mold vent holes, improves the level of intelligent sand casting, and ensures the quality of castings. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a three-dimensional structural schematic diagram of the device of the present invention.

[0044] Figure 2 This is a front view of the device of the present invention.

[0045] Figure 3 This is a structural schematic diagram of the internal support frame.

[0046] Figure 4 This is a sectional view of the internal support frame.

[0047] Figure 5 This is a partial structural diagram of the sandbox's right corner engaging with the right roller.

[0048] Figure 6This is a schematic diagram of the displacement mechanism on the frame-type connecting frame.

[0049] Figure 7 This is a 3D view of the Y-axis displacement mechanism.

[0050] Figure 8 This is the front view of the Y-axis shifting mechanism.

[0051] Figure 9 This is a schematic diagram of the Z-axis shifting mechanism and the air blowing pipe assembly.

[0052] Figure 10 This is a schematic diagram of the air blowing tube assembly.

[0053] Figure 11 This is a partial structural diagram of the head of the air tube;

[0054] Figure 12 This is a schematic diagram of another embodiment of the device of the present invention.

[0055] The numbers and letters in the diagram represent the names of the corresponding components:

[0056] 10-Inner support frame; 101-Left support; 102-Right support; 103-Drilling station; 104-Cleaning station; 11-Roller assembly; 111-Left roller; 1111-First cylindrical part; 1112-Second cylindrical part; 1113-Third cylindrical part; 112-Right roller; 12-Sand box side push mechanism; 121-Support plate; 122-Push shaft; 123-Push cylinder; 20-Sand box; 21-Horizontal contact surface; 22-Front guide column; 23-Rear guide column; 30-Outer support frame; 31-Frame-type connecting frame; 32-X-direction shifting mechanism; 321-X-direction left guide rail; 322- X-direction right guide rail; 323-X-direction shift plate; 324-X-direction shift drive mechanism; 3241-gear motor; 3242-drive shaft; 3243-left driving wheel; 3244-left driven wheel; 3245-right driving wheel; 3246-right driven wheel; 3247-left drive belt; 3248-right drive belt; 33-Y-direction shift mechanism; 331-Y-direction guide rail; 332-Y-direction shift frame; 333-Y-direction shift drive mechanism; 3331-first motor; 3332-first driving wheel; 3333-first driven wheel; 3334-first drive belt; 34-Z-direction shift mechanism; 341-vertical mounting plate; 342-Z-direction guide rail; 343-Z-direction slider; 3431-first guide hole; 344-Z-direction shift drive motor Structure; 3441-Second motor; 3442-Second driving wheel; 3443-Second driven wheel; 3444-Second transmission belt; 35-Blowing pipe assembly; 351-Guide block; 3511-Second guide hole; 352-Blowing pipe; 3521-Air outlet; 353-Compression spring; 354-Limit nut; 355-Upper position detection sensor; 356-Lower position detection sensor; 36-Flat blowing nozzle; 42-First dust collection hood unit; 421-Outer cover; 422-Outer cover lifting drive mechanism; 43-First weighing unit; 431-Electronic weighing instrument; 432-Front lifting mechanism; 433-Rear lifting mechanism; 434-Front guide sleeve; 435-Rear guide sleeve; 51-Second dust collection hood unit; 52-Second weighing unit. Detailed Implementation

[0057] 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.

[0058] like Figures 1-2 As shown, one embodiment of the present invention is: a sand mold venting hole cleaning device, comprising:

[0059] An inner support frame 10 is provided with a raceway assembly 11, and the sand box 20 of the sand mold to be cleaned moves along the raceway assembly 11.

[0060] An outer support frame 30 is arranged around the inner support frame 10 and spans across the inner support frame 10 on both sides. A frame-type connecting frame 31 is fixedly connected to the top of the outer support frame 30.

[0061] The X-axis shifting mechanism 32 includes an X-axis left guide rail 321, an X-axis right guide rail 322, an X-axis shifting plate 323, and an X-axis shifting drive mechanism 324. The X-axis left guide rail 321 and the X-axis right guide rail 322 are mounted on the frame-type connecting frame 31. The X-axis left guide rail 321 and the X-axis right guide rail 322 are both arranged parallel to the moving direction of the sand box 20. The two ends of the X-axis shifting plate 323 are slidably mounted on the X-axis left guide rail 321 and the X-axis right guide rail 322, respectively. The X-axis shifting drive mechanism 324 drives the X-axis shifting plate 323 to move in the X direction.

[0062] The Y-axis shifting mechanism 33 includes a Y-axis guide rail 331, a Y-axis shifting frame 332, and a Y-axis shifting drive mechanism 333. The Y-axis guide rail 331 is fixedly installed on the X-axis shifting plate 323. The length direction of the Y-axis guide rail 331 is perpendicular to the moving direction of the sand box 20. The Y-axis shifting frame 332 is slidably installed on the Y-axis guide rail 331. The Y-axis shifting drive mechanism 333 drives the Y-axis shifting frame 332 to move in the Y direction.

[0063] Z-axis displacement mechanism 34 includes a vertical mounting plate 341, a Z-axis guide rail 342, a Z-axis slider 343, and a Z-axis displacement drive mechanism 344. The vertical mounting plate 341 is fixedly connected to the Y-axis displacement frame 332. The Z-axis guide rail 342 is vertically fixed on the vertical mounting plate 341. The Z-axis slider 343 is slidably mounted on the Z-axis guide rail 342. The Z-axis displacement drive mechanism 344 drives the Z-axis slider 343 to move in the Z-axis direction.

[0064] The air blowing pipe assembly 35 is vertically mounted on the Z-axis slider 343;

[0065] A compressed air generator, the outlet of which is connected via a pipeline to an air blowing pipe assembly 35.

[0066] The beneficial effects of adopting the above technical solution are as follows: After the sand mold venting holes are drilled, the sand box to be cleaned is moved to the inner support frame. The air blowing pipe assembly is automatically driven by the X-axis shifting mechanism, Y-axis shifting mechanism and Z-axis shifting mechanism to extend into each venting hole in sequence to blow air and clean the residual sand. The cleaning efficiency is high and the casting quality is effectively ensured.

[0067] like Figures 9-11As shown, in some other embodiments of the present invention, the air blowing tube assembly includes a guide block 351, an air blowing tube 352, and a compression spring 353. The guide block 351 is fixed on the vertical mounting plate 341. The air blowing tube 352 is a slender hollow tube. The upper part of the air blowing tube 352 passes through the first guide hole 3431 on the Z-axis slider 343. A limiting nut 354 is provided on the outer periphery of the middle position of the air blowing tube 352. The lower part of the air blowing tube 352 passes through the second guide hole 3511 of the guide block 351. The compression spring 353 is sleeved on the upper part of the air blowing tube 352. The two ends of the compression spring 353 abut against the Z-axis slider 343 and the limiting nut 354, respectively. The beneficial effects of adopting the above technical solution are: it can effectively ensure the downward verticality of the air blowing pipe; when the air blowing pipe is not aligned with the exhaust hole and collides with the sand mold, the air blowing pipe can be pressed up to prevent damage to the sand mold; at the same time, an upper position detection sensor 355 can be set on the side of the Z-guide rail corresponding to the upper limit position of the Z-axis slider, and a lower position detection sensor 356 can be set on the lower limit position. The upper position detection sensor 355 and the lower position detection sensor 356 are also perpendicular to the axis of the air blowing pipe, so that they can work together with the position detection sensor to detect whether the air blowing pipe has entered the sand mold exhaust hole smoothly; after realignment, the compression spring can cause the air blowing pipe to return to its original position.

[0068] like Figure 11 As shown, in some other embodiments of the present invention, the lower end face of the air blowing pipe 352 is a conical surface, and air outlet holes 3521 are arranged in a circumferential array on the lower end face of the air blowing pipe, with the air outlet holes 3521 arranged obliquely downward from the inside out. The beneficial effect of adopting the above technical solution is to improve the ability of the air blowing pipe to clean residual sand in the exhaust hole.

[0069] like Figures 2-5As shown, in some other embodiments of the present invention, the inner support frame 10 includes a left support 101 and a right support 102, and the roller assembly 11 includes a left roller group and a right roller group. The left roller group includes a plurality of left rollers 111, each left roller 111 being rotatably mounted on the left support 101. The right roller group includes a plurality of right rollers 112, each right roller 112 being rotatably mounted on the right support 102. Both the left roller 111 and the right roller 112 include a first cylindrical portion 1111, a second cylindrical portion 1112, and a third cylindrical portion 1113 arranged sequentially from the head end to the tail end. The outer diameter of the second cylindrical portion 1112 is larger than the outer diameter of the first cylindrical portion 1111, and the outer diameter of the second cylindrical portion 1112 is also larger than the outer diameter of the third cylindrical portion 1113. The third cylindrical portion 1113 of the left roller 111 is rotatably mounted on the left bracket 101, and the third cylindrical portion 1113 of the right roller 112 is rotatably mounted on the right bracket 102. The lower corners of the left and right sides of the sand box 20 to be cleaned are right angles, and the bottom surfaces of the left and right sides of the sand box are horizontal contact surfaces 21. The width of the horizontal contact surface 21 is greater than the length of the first cylindrical portion 1111. The bottom surfaces of the left and right sides of the sand box 20 press against the first cylindrical portion 1111 of the left roller 111 and the first cylindrical portion 1111 of the right roller 112, respectively. It also includes a sand box side-pushing mechanism 12, which includes a support plate 121, a push shaft 122, and a push cylinder 123. The support plate 121 is fixed to the left bracket 101 or the right bracket 102, the cylinder body of the push cylinder 123 is fixed to the support plate 121, and the push shaft 122 is mounted on the piston rod of the push cylinder 123. The end of the push shaft 122 matches the positioning hole on the side wall of the sand box 20. The beneficial effect of adopting the above technical solution is that it can quickly realize the positioning of the sand box on the raceway assembly and ensure the precise alignment of the air blowing pipe and the exhaust hole.

[0070] like Figures 6-9As shown, in some other embodiments of the present invention, the X-axis shifting drive mechanism 324 includes a geared motor 3241, a drive shaft 3242, a left driving wheel 3243, a left driven wheel 3244, a right driving wheel 3245, a right driven wheel 3246, a left drive belt 3247, and a right drive belt 3248. The base of the geared motor 3241 is fixedly mounted on the frame-type connecting frame 31, and the drive shaft 3242 is rotatably mounted on the frame-type connecting frame 31. The drive shaft 3242 is drively connected to the output shaft of the geared motor 3241. The left driving wheel 3243... 3 and the right drive wheel 3245 are respectively installed on the left and right ends of the drive shaft 3242. The left driven wheel 3244 and the right driven wheel 3246 are respectively rotatably installed on the left and right side plates of the frame-type connecting frame 31. The left drive belt 3247 is wound between the left drive wheel 3243 and the left driven wheel 3244, and the right drive belt 3248 is wound between the right drive wheel 3245 and the right driven wheel 3246. The left end of the X-direction shift plate 323 is connected to the left drive belt 3247, and the right end of the X-direction shift plate 323 is connected to the right drive belt 3248. The Y-axis shifting drive mechanism 333 includes a first motor 3331, a first driving wheel 3332, a first driven wheel 3333, and a first transmission belt 3334. The base of the first motor 3331 is fixedly mounted on the X-axis shifting plate 323. The first driving wheel 3332 and the first driven wheel 3333 are rotatably mounted on the left and right ends of the X-axis shifting plate 323, respectively. The first driving wheel 3332 is connected to the output shaft of the first motor 3331. The first transmission belt 3334 is wound between the first driving wheel 3332 and the first driven wheel 3333. The Y-axis shifting frame 332 is connected to the first transmission belt 3334. The Z-axis shifting drive mechanism 344 includes a second motor 3441, a second driving wheel 3442, a second driven wheel 3443, and a second transmission belt 3444. The base of the second motor 3441 is fixedly mounted on a vertical mounting plate 341. The second driven wheel 3443 and the second driving wheel 3442 are rotatably mounted on the upper and lower ends of the vertical mounting plate 341, respectively. The second driving wheel 3442 is connected to the output shaft of the second motor 3441. The second transmission belt 3444 is wound between the second driving wheel 3442 and the second driven wheel 3443. The Z-axis slider 343 is connected to the second transmission belt 3444. The beneficial effect of adopting the above technical solution is that the overall weight of the shifting mechanism can be effectively reduced through the belt drive mechanism, ensuring smooth and fast operation.

[0071] like Figure 1 As shown, in some embodiments of the present invention, a plurality of flat air nozzles 36 arranged in a row are also installed on the front side of the frame-type connecting frame 31, and the arrangement direction of the plurality of flat air nozzles 36 is perpendicular to the moving direction of the sand box 20. The beneficial effect of adopting the above technical solution is that the flat air nozzles can clean the residual floating sand on the surface of the sand mold, ensuring the overall cleaning effect of the sand mold.

[0072] like Figure 12 As shown, in some other embodiments of the present invention, the inner support frame 10 is provided with a drilling station 103 and a cleaning station 104 in sequence.

[0073] A drilling device, a first dust collection hood unit 42, and a first weighing unit 43 are provided below the sand box at the drilling station 103. The drilling device is used to drill multiple vent holes in the sand mold at the drilling station 103. The specific structure of the drilling device will not be described in this application, but can be selected from the prior art. It generally includes a drill bit module and a three-dimensional moving mechanism that drives the drill bit module to move. The drilling device drills vent holes from the bottom of the sand mold to the top. The first dust collection hood unit 42 is used to collect the debris generated by drilling the vent holes. The first weighing unit 43 is used to weigh the weight of the sand box and sand mold before drilling the vent holes and to weigh the weight of the sand box and sand mold after drilling the vent holes.

[0074] A cleaning station 104 is located above the sand box and is equipped with a cleaning module. The cleaning station is located below the sand box and is equipped with a second dust collection hood unit 51 and a second weighing unit 52. The cleaning module is used to perform the first cleaning of the vent holes drilled on the sand mold. The second dust collection hood unit 51 is used to collect the debris generated by the first cleaning of the vent holes. The second weighing unit 52 is used to weigh the sand box and the sand mold after the first cleaning of the vent holes.

[0075] The method for cleaning the vent holes of sand molds includes the following steps:

[0076] Step 1: When the sand box 20 is moved to the drilling station 103, the total weight of the sand box and sand mold is weighed by the first weighing unit 43 as G0.

[0077] Step 2: The first integrated cover unit 42 is connected to the sand box, and the drilling device is turned on to drill multiple vent holes in the sand mold in sequence;

[0078] Step 3: After the vent hole is drilled, weigh the sand box and sand mold again through the first weighing unit 43 to get the total weight G1.

[0079] Step 4: Calculate the amount of debris removed by drilling Δ1 = G0 - G1, and compare Δ1 with the set value; when Δ1 is greater than the maximum set value Sm, stop the machine and check whether the sand mold is damaged; when Δ1 is less than the minimum set value Sn, replace the drill bit of the drilling device, and repeat steps 2-4 after replacing the new drill bit; when Sn≤Δ1≤Sm, move the sand box 20 to the cleaning station 104.

[0080] Step 5: After the sand box is moved to the cleaning station 104, the second dust collection hood unit 51 is connected to the sand box 20, the cleaning module is turned on, and air is blown to clean each exhaust hole.

[0081] Step 6: After the cleaning module is cleaned, weigh the total weight of the sand box and sand mold using the second weighing unit 52 to get G2.

[0082] Step 7: Calculate the amount of debris removed by the cleaning module Δ2 = G1 - G2; compare the actual total amount of debris removed from the vent hole Δ1 + Δ2 with the standard weight value Sk of the debris removed from the vent hole; when a% ≤ (Δ1 + Δ2) / (Sk * t) ≤ b%, the cleaning is complete, where a is the lower limit of allowable value, 90 < a < 100, b is the upper limit of allowable value, 100 < b < 110, and t is the tool life correction value, 0.9 ≤ t ≤ 1, the value of t is gradually reduced according to the tool usage time; when (Δ1 + Δ2) / ( When (Sk*t) > b%, stop the machine and check for any defects in the sand mold; when (Δ1+Δ2) / (Sk*t) < a%, repeat steps 5-7. During the next cleaning, the airflow of the cleaning module and the lifting speed of the air pipe assembly are adjusted according to the value of (Δ1+Δ2) / (Sk*t). The smaller the value of (Δ1+Δ2) / (Sk*t), the larger the airflow of the cleaning module and the faster the lifting speed of the air pipe assembly.

[0083] Step 8: If (Δ1+Δ2) / (Sk*t) is still less than a% after the cleaning module cleans the same sand mold twice, then stop the machine for maintenance.

[0084] The beneficial effects of adopting the above technical solution are: by using the first weighing unit of the drilling station and the second weighing unit of the cleaning station, the drilling and cleaning quality can be calculated by the weight difference, which can realize online automatic monitoring of the cleaning effect of sand mold venting holes, improve the level of intelligent sand casting, and ensure the quality of castings.

[0085] like Figure 12 As shown, in some other embodiments of the present invention, the first dust collection hood unit 42 and the second dust collection hood unit 51 both include an outer cover 421, an outer cover lifting drive mechanism 422, and a debris collection mechanism. The upper end of the outer cover 421 is open and matches the lower outer edge of the sand box 20. The outer cover lifting drive mechanism 422 is used to drive the outer cover 421 to move up and down so as to achieve the contact and separation of the outer cover 421 with the sand box 20. The debris collection mechanism is used to absorb and collect the debris that falls into the outer cover.

[0086] like Figure 12As shown, in some other embodiments of the present invention, both the first weighing unit 43 and the second weighing unit 52 include an electronic weighing instrument 431, a front lifting mechanism 432, a rear lifting mechanism 433, a front guide sleeve 434, and a rear guide sleeve 435; a front guide post 22 is provided on the front side of the bottom surface of the sand box 20 frame, and a rear guide post 23 is provided on the rear side; the front lifting mechanism 432 and the rear lifting mechanism 433 are respectively installed on the front and rear sides of the force-bearing frame on the upper surface of the electronic weighing instrument 431, the front guide sleeve 434 is installed on the top of the front lifting mechanism 432, and the rear guide sleeve 435 is installed on the top of the rear lifting mechanism 433; during weighing, the front lifting mechanism 432 drives the front guide sleeve 434 to rise and cooperate with the front guide post 22, and the rear lifting mechanism 433 drives the rear guide sleeve 435 to rise and cooperate with the rear guide post 23, the sand box and the sand mold move upward and disengage from the roller assembly, and the electronic weighing instrument 431 weighs the sand box and the sand mold.

[0087] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A sand mold vent hole cleaning method characterized by, The sand mold exhaust hole cleaning device comprises: An inner support frame is provided with a roller assembly, and the sand box of the sand mold moves along the roller assembly; An outer support frame is arranged at the periphery of the inner support frame and spans the inner support frame left and right, and the top of the outer support frame is fixedly connected with a frame-shaped connecting frame; At least one cleaning module, the cleaning module comprises an X-direction displacement mechanism, a Y-direction displacement mechanism, a Z-direction displacement mechanism and a blowing pipe assembly, The X-direction displacement mechanism comprises an X-direction left guide rail, an X-direction right guide rail, an X-direction displacement plate and an X-direction displacement driving mechanism, the X-direction left guide rail and the X-direction right guide rail are installed on the frame-shaped connecting frame, and the X-direction left guide rail and the X-direction right guide rail are both arranged in parallel with the moving direction of the sand box, the two ends of the X-direction displacement plate are slidably installed on the X-direction left guide rail and the X-direction right guide rail respectively, and the X-direction displacement driving mechanism drives the X-direction displacement plate to move in the X-direction; The Y-direction displacement mechanism comprises a Y-direction guide rail, a Y-direction displacement frame and a Y-direction displacement driving mechanism, the Y-direction guide rail is fixedly installed on the X-direction displacement plate, the length direction of the Y-direction guide rail is perpendicular to the moving direction of the sand box, the Y-direction displacement frame is slidably installed on the Y-direction guide rail, and the Y-direction displacement driving mechanism drives the Y-direction displacement frame to move in the Y-direction; The Z-direction displacement mechanism comprises a vertical installation plate, a Z-direction guide rail, a Z-direction sliding block and a Z-direction displacement driving mechanism, the vertical installation plate is fixedly connected with the Y-direction displacement frame, the Z-direction guide rail is vertically fixed on the vertical installation plate, the Z-direction sliding block is slidably installed on the Z-direction guide rail, and the Z-direction displacement driving mechanism drives the Z-direction sliding block to move in the Z-direction; The blowing pipe assembly is vertically installed on the Z-direction sliding block; A compressed air generating device, the blowing pipe assembly of the cleaning module is connected to the air outlet of the compressed air generating device through an air valve and an air pipe; A drilling station and a cleaning station are sequentially arranged on the inner support frame, A drilling device, a first dust hood unit and a first weighing unit are arranged below the sand box at the drilling station, the drilling device is used for drilling multiple exhaust holes on the sand mold at the drilling station, the first dust hood unit is used for collecting the debris generated by drilling the exhaust holes, and the first weighing unit is used for weighing the weight of the sand box and the sand mold before drilling the exhaust holes and for weighing the weight of the sand box and the sand mold after drilling the exhaust holes; A cleaning module is arranged above the sand box at the cleaning station, a second dust hood unit and a second weighing unit are arranged below the sand box at the cleaning station, the cleaning module is used for blowing the drilled exhaust holes on the sand mold for the first time, the second dust hood unit is used for collecting the debris generated by the first blowing of the exhaust holes, and the second weighing unit is used for weighing the weight of the sand box and the sand mold after the first blowing of the exhaust holes; The sand mold exhaust hole cleaning method comprises the following steps: Step 1, when the sand box moves to the drilling station, the total weight of the sand box and the sand mold is weighed by the first weighing unit as G0; Step 2, the first dust hood unit is connected with the sand box, and the drilling device is started to drill multiple exhaust holes on the sand mold in sequence; Step 3, after the exhaust holes are drilled, the total weight of the sand box and the sand mold is weighed again by the first weighing unit as G1; Step 4, calculate the amount of drillings removed Δ1=G0-G1, compare Δ1 with the set value, when Δ1 is greater than the maximum set value Sm, stop to check if the sand mold is damaged, when Δ1 is less than the minimum set value Sn, replace the drill bit of the drilling device, and after replacing the new drill bit, repeat steps 2-4, when Sn≤Δ1≤Sm, then move the sand box to the cleaning station; Step 5, after the sand box is moved to the cleaning station, the second dust collection cover unit is connected with the sand box, the cleaning module is started, and each exhaust hole is cleaned by blowing; Step 6, after the cleaning module is cleaned, the total weight of the sand box and the sand mold is weighed by the second weighing unit, and the total weight is G2; Step 7, calculate the amount of drillings removed by the cleaning module Δ2=G1-G2, compare the actual total amount of drillings Δ1+Δ2 with the standard weight value Sk of the exhaust hole, when a%≤(Δ1+Δ2) / (Sk*t)≤b%, the cleaning is completed, wherein a is the allowable lower limit value, 90 Step 8, if (Δ1+Δ2) / (Sk*t) is still less than a% after the cleaning module cleans the same sand mold twice, stop for maintenance.

2. The sand mold vent cleaning method according to claim 1, characterized by, The blowing pipe assembly comprises a guide block, a blowing pipe and a compression spring, the guide block is fixed on the vertical mounting plate, the blowing pipe is an elongated hollow pipe body, the upper part of the blowing pipe is arranged in the first guide hole on the Z-direction sliding block, the middle position of the outer periphery of the blowing pipe is provided with a limiting nut, the lower part of the blowing pipe is arranged in the second guide hole of the guide block, and the upper part of the blowing pipe is sleeved with the compression spring.

3. The sand mold vent cleaning method according to claim 2, characterized by, The lower end surface of the blowing pipe is a conical surface, and the blowing pipe is provided with a plurality of gas outlet holes which are arranged in an array along the circumference and are arranged obliquely downward from inside to outside.

4. The sand mold vent cleaning method according to claim 1, characterized by, The inner support frame comprises a left support and a right support, the rolling track assembly comprises a left rolling wheel group and a right rolling wheel group, the left rolling wheel group comprises a plurality of left rolling wheels, each left rolling wheel is rotatably mounted on the left support, and the right rolling wheel group comprises a plurality of right rolling wheels, each right rolling wheel is rotatably mounted on the right support.

5. The sand mold vent cleaning method according to claim 4, characterized by, The left and right rollers each comprise a first cylindrical part, a second cylindrical part and a third cylindrical part arranged in sequence from the head end to the tail end, the outer diameter of the second cylindrical part is greater than the outer diameter of the first cylindrical part, and the outer diameter of the second cylindrical part is also greater than the outer diameter of the third cylindrical part, the third cylindrical part of the left roller is rotatably mounted on the left support, the third cylindrical part of the right roller is rotatably mounted on the right support, the lower corner of the left and right side parts of the sand box to be cleaned is a right angle, the bottom surface of the left and right side parts of the sand box is a horizontal contact surface, the width of the horizontal contact surface is greater than the length of the first cylindrical part, and the bottom surface of the left and right side parts of the sand box is respectively pressed against the first cylindrical part of the left roller and the first cylindrical part of the right roller.

6. The sand mold vent cleaning method according to claim 5, characterized by, The cleaning module further comprises a sand box side pushing mechanism, the sand box side pushing mechanism comprises a support plate, a pushing shaft and a pushing cylinder, the support plate is fixed on the left support or the right support, the cylinder body of the pushing cylinder is fixed on the support plate, the pushing shaft is installed on the piston rod of the pushing cylinder, and the end portion of the pushing shaft is matched with the positioning hole on the side wall of the sand box.

7. The sand mold vent cleaning method according to claim 1, characterized by, The first and second dust collecting cover units each comprise an outer cover body, an outer cover lifting driving mechanism and a debris suction and collection mechanism, the outer cover body is open at the upper end and matched with the lower outer edge of the sand box, the outer cover lifting driving mechanism is used to drive the outer cover body to move up and down to realize the adhesion and separation of the outer cover body and the sand box, and the debris suction and collection mechanism is used to suck and collect the debris falling into the outer cover body.

8. The sand mold vent cleaning method according to claim 7, characterized by, The first and second weighing units each comprise an electronic weighing instrument, a front lifting mechanism, a rear lifting mechanism, a front guide sleeve and a rear guide sleeve; the front side of the bottom surface of the sand box frame is provided with a front guide column, and the rear side is provided with a rear guide column; the front lifting mechanism and the rear lifting mechanism are respectively installed on the front side and the rear side of the upper surface of the electronic weighing instrument, the front guide sleeve is installed on the top end of the front lifting mechanism, and the rear guide sleeve is installed on the top end of the rear lifting mechanism; during weighing, the front lifting mechanism drives the front guide sleeve to ascend and cooperate with the front guide column, the rear lifting mechanism drives the rear guide sleeve to ascend and cooperate with the rear guide column, the sand box and the sand mold are separated from the rolling way assembly upwards, and the electronic weighing instrument weighs the sand box and the sand mold.

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