High-precision pouring device
By adopting an adjustable fork and airbag structure in the casting device, combined with the clamping mechanism and pressure sensor, the problems of sand-shaped blank deformation and sand falling off during the casting process are solved, and a higher quality casting effect is achieved.
Patent Information
- Application Number
- CN202420848278.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-23
AI Technical Summary
During the casting process, the sand-shaped blank expands and shrinks due to the high temperature of the metal melt, resulting in deformation of the refractory material and the fall off of the sand, affecting the performance and quality of the casting device.
A high-precision casting device is designed, using a fork structure that can be opened or closed and the airbag top support mechanism, and is combined with the clamping mechanism and pressure sensor to accurately adjust the position and shape of the sand box to ensure the alignment of the metal melt. The liquid inlet hole of the sand-shaped blank reduces the fall of sand.
Through the precise casting process, the sand falling off of the sand blank is reduced, the performance and quality of the casting device are improved, and the problem of excessive flushing force when the metal melt is not aligned is avoided.
Smart Images
Figure CN222242615U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of pouring devices, in particular to a high-precision pouring device. Background Art
[0002] Casting is a method of melting the corresponding metal into a liquid state and making an object of a specific shape in a mold made of refractory materials. The casting process can realize the preparation of devices with high impact resistance, fatigue resistance, corrosion resistance and other characteristics, such as turbine disks, aircraft engine working blades, container corner fittings and other large devices. Sand casting is a type of casting technology. The refractory material is generally filled with sand in a sand box where the device is placed, so as to form a sand mold blank with an inner cavity of a specific shape. After pouring molten metal into the sand mold blank and cooling the molten metal, the corresponding device can be obtained.
[0003] During the pouring process, after the sand mold blank contacts the molten metal, the high temperature of the molten metal will be quickly transferred to the sand mold blank, causing the sand mold blank to heat up quickly and expand, while the sand box outside the sand mold blank is heated later, so that the sand mold blank is squeezed and deformed. In this case, the inner wall of the refractory material will peel off due to the scouring effect of the molten metal during the contact with the molten metal, and finally form a part of the equipment after mixing with the molten metal. When the sand mold blank receives the molten metal, the sand mold blank begins to cool down rapidly and shrink, and at this time the sand box begins to expand due to heat. In this state, the sand mold blank becomes loose, causing shrinkage or shrinkage holes to occur during the solidification of the molten metal. The prior art does not address the temperature changes in the casting process, but simply injects the molten metal into the sand mold blank, and the performance of the resulting device needs to be improved.
[0004] The purpose of this utility model is to design a high-precision pouring device in view of the above-mentioned problems in the prior art. Utility Model Content
[0005] In view of the problems existing in the above-mentioned prior art, the utility model provides a high-precision pouring device, which can effectively solve at least one problem existing in the above-mentioned prior art.
[0006] The technical solution of the utility model is:
[0007] A high-precision pouring device, comprising:
[0008] A gantry, wherein the gantry is provided with a lifting mechanism;
[0009] A fork frame connected to the gantry, the fork frame is driven by the lifting mechanism, and a fork connecting rod is provided at the front end of the fork frame;
[0010] There are two forks, one on the left and one on the right, respectively connected to the fork connecting rod. The forks are driven by the corresponding first driving cylinders to open or close on both sides of the center line of the fork frame. The upper end surface of the fork is provided with an airbag, which is inflated or deflated by a corresponding inflation device. After the airbag is inflated, it protrudes from the upper surface of the transverse part of the fork. After the forks are brought together, the airbag is inflated to support the lower middle part of the corresponding sand box. After the forks are opened, the airbag is inflated to support the lower sides of the corresponding sand box;
[0011] A pouring bucket, used for holding molten metal, the pouring bucket is fixedly arranged at the upper end of the door frame, and a liquid outlet is arranged at the bottom of the pouring bucket, and the liquid outlet is controlled by a controllable valve to be opened or closed;
[0012] Control system, used to control each component.
[0013] Furthermore, it includes a clamping mechanism, which is arranged on the left and right sides of the gantry. The clamping mechanism is driven by the corresponding second driving cylinder to clamp or release the corresponding sand box on the left and right sides of the gantry. After the clamping mechanism clamps the sand box, the center line of the sand box coincides with the center line of the fork frame.
[0014] Furthermore, the clamping mechanism includes a group of rollers, which are respectively arranged on the left and right sides of the door frame. When the rollers clamp the corresponding sand box, the rollers roll in contact with the corresponding sand box, thereby allowing the fork and the fork frame to rise.
[0015] Furthermore, the rollers are driven respectively by corresponding cylinders, and a group of the cylinders are symmetrically arranged about the center line of the fork frame, wherein the rod cavity of one of the cylinders is connected to the rodless cavity of the other cylinder, so that the two cylinders move synchronously.
[0016] Furthermore, the oil cylinder is provided with a hydraulic sensor.
[0017] Furthermore, the airbags are arranged at the left and right ends of the upper end surface of the transverse portion of the fork. When the forks are brought together, the airbags close to the center line of the fork frame are inflated to support the lower middle part of the corresponding sand box. When the forks are opened, the airbags away from the center line of the fork frame are inflated to support the lower sides of the corresponding sand box.
[0018] Furthermore, a plurality of rollers are provided on the transverse portion of the fork, and the axial direction of the rollers is the same as the extending direction of the transverse portion of the fork.
[0019] Furthermore, the airbags are arranged on the left and right sides of the roller.
[0020] Furthermore, a pressure sensor is provided on the front side of the vertical portion of the fork. After the fork is extended under the corresponding sand box, the sand box presses against the pressure sensor. When the data of the pressure sensor reaches a pressure threshold, the control system determines that the fork is extended into place.
[0021] Furthermore, the clamping mechanism is arranged at a position of the door frame corresponding to the lower half of the sand box.
[0022] Therefore, the utility model provides the following effects and / or advantages:
[0023] The utility model has a fork that can be opened or closed, and an air bag structure is arranged on the fork. During the process of pouring molten metal into a sand mold blank, the air bag is firstly used to support the middle part of the lower part of the sand box, and then to support the two sides of the lower part of the sand box, thereby adapting to the technical problems that the sand box and the sand mold blank are heated in sequence and have different expansion coefficients during the pouring process, and the shape of the sand box can be finely adjusted by driving the air bag to support the corresponding position of the sand box through the fork.
[0024] The utility model can adjust the left-right relative position of the shaping sand box and the pouring bucket when the sand box is on the fork through the clamping action of the clamping mechanism, so that the center line of the sand box coincides with the center line of the fork frame. In addition, the present invention uses a pressure sensor to make the fork fully extend under the sand box after the fork is inserted into the sand box, thereby accurately determining the front-to-back relative position of the sand box and the pouring bucket when the sand box is on the fork. The combination of the two can accurately determine the position of the pouring bucket and the sand box, so that the pouring bucket can align the metal solution with the liquid inlet hole of the sand mold blank when outputting the metal solution, thereby avoiding excessive flushing force on one side of the liquid inlet hole of the sand mold blank when the metal solution is not aligned.
[0025] The utility model can reduce the sand shedding of the sand mold blank through precise pouring, thereby improving the performance and quality of the cast device.
[0026] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the invention. The purpose and other advantages of the invention are realized and obtained by the structures particularly pointed out in the description and the drawings.
[0027] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.
[0029] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective.
[0030] Figure 3 Schematic diagram of the oil circuit connection of the cylinder.
[0031] Figure 4 It is a schematic diagram of the state of the utility model when holding the sand box.
[0032] Figure 5 It is a schematic diagram of the state in which the cargo fork of the utility model is extended under the sand box.
[0033] Figure 6 It is a schematic diagram of the state of the forks of the utility model being brought together and the airbag close to the center line after being inflated.
[0034] Figure 7 It is a schematic diagram of the state of the cargo fork of the utility model being opened and the air bag being inflated away from the center line.
[0035] Reference numerals:
[0036] The gantry 5, the lifting mechanism 501, the fork frame 6, the fork connecting rod 601, the fork 7, the first driving cylinder 701, the air bag 702, the roller 703, the pouring bucket 8, the clamping mechanism 9, the second driving cylinder 901, the sand box 100, the sand mold blank 200, and the pallet 300. DETAILED DESCRIPTION
[0037] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the accompanying drawings:
[0038] Embodiment 1
[0039] refer to Figure 1-3 , a high-precision casting device, comprising:
[0040] A door frame 5, wherein the door frame 5 is provided with a lifting mechanism 501;
[0041] In this embodiment, the upper part of the gantry 5 is fixedly arranged on the corresponding driving mechanism, the lifting mechanism 501 is a cylinder, the outer shell of the cylinder is fixedly arranged on the gantry, and the piston rod of the cylinder extends downward, so that it can serve as the lifting mechanism 501 to drive other structures to move up and down.
[0042] A fork frame 6 is connected to the mast 5, the fork frame 6 is driven by the lifting mechanism 501, and a fork connecting rod 601 is provided at the front end of the fork frame 6;
[0043] In this embodiment, the bottom end of the fork frame 6 is connected to the piston rod of the oil cylinder, and the fork frame 6 and the mast 5 are connected by a track. The track between the fork frame 6 and the mast 5 limits the movable direction of the fork frame 6 to the vertical direction, and also limits the fork frame 6 to be unable to separate from the mast 5.
[0044] There are two forks 7, one on the left and one on the right, respectively connected to the fork connecting rod 601. The forks 7 are driven by the corresponding first driving cylinders 701 to open or close on both sides of the center line of the fork frame 6. An airbag 702 is provided on the upper end surface of the fork 7. The airbag 702 is inflated or deflated by a corresponding inflation device. After the airbag 702 is inflated, it protrudes from the upper surface of the transverse part of the fork 7. After the forks 7 are brought together, the airbag 702 is inflated to support the lower middle part of the corresponding sand box 100. After the forks 7 are opened, the airbag 702 is inflated to support the lower sides of the corresponding sand box 100.
[0045] Specifically, airbags 702 are respectively provided at the left and right ends of the upper end surface of the transverse portion of the fork 7. The airbags 702 are inflated or deflated by corresponding inflating devices (not shown). When the forks 7 are brought together, the airbags 702 close to the center line of the fork frame 6 are inflated to support the lower middle part of the corresponding sand box 100. When the forks 7 are opened, the airbags 702 away from the center line of the fork frame 6 are inflated to support the lower sides of the corresponding sand box 100.
[0046] In this embodiment, the fork 7 is one of the core technical features. First, the two forks 7 are driven by the first driving cylinder 701 respectively, so that the two forks 7 can move left and right respectively, and the purpose is that after extending into the bottom of the sand box 100, the forks 7 can be freely opened or closed, so as to adjust the position of the forks 7 at the bottom of the sand box 100. In addition, the forks 7 are respectively provided with air bags 702 at the left and right ends of the transverse part, and the air bags 702 can be inflated or deflated by the inflation device. After being inflated, the air bags 702 can protrude from the upper end surface of the transverse part, and after being deflated, they can return to the state of being attached to the upper end surface of the transverse part.
[0047] The purpose of the fork 7 being configured to be openable or closeable and the airbag 702 being provided on the transverse portion of the fork 7 is as follows:
[0048] After the sand box 100 is filled with corresponding sand to form the sand mold blank 200, the sand box 100 is generally placed on a pallet 300. A supporting hole is provided at the bottom of the pallet 300 so that the fork 7 can be inserted. The width of the supporting hole is greater than the width of the fork 7, so that the fork 7 still has a certain space to move left and right after it is inserted into the supporting hole.
[0049] First, refer to Figure 5 , after the fork 7 is extended into the bottom of the pallet 300 with the airbags 702 deflated, the pallet 300 is not supported by the bottom and is in a flat state. The sand box 100 above the pallet 300 is also not supported by the corresponding force. The sand box 100 is wrapped around the sand blank 200. The center line of the fork frame 6 is Figure 5-7 The dotted line in .
[0050] Then, refer to Figure 6 After the forks 7 are brought closer, the airbag 702 near the center line of the fork frame 6 is inflated to support the lower middle part of the corresponding sand box 100. At this time, the lower middle part of the sand box 100 is subjected to the supporting force F from the airbag 702, the middle part of the sand box 100 is slightly arched, and the upper end of the sand box 100 is slightly expanded, so that the sand box 100 is no longer attached to the periphery of the sand mold blank 200, giving the sand mold blank 200 space for thermal expansion when the molten metal is first poured into the sand mold blank 200, reducing the sand mold blank 200 being squeezed by the sand box 100 and causing the sand to fall off.
[0051] Next, refer to Figure 7 In the process of continuous pouring of molten metal into the sand mold blank 200, the heat of the molten metal begins to transfer to the sand box 100, and the fork 7 begins to open. After the fork is opened, the airbag 702 away from the center line of the fork frame 6 is inflated to support the lower sides of the corresponding sand box 100. At this time, the lower sides of the sand box 100 are subjected to the supporting force F from the airbag 702, the middle of the sand box 100 is slightly concave, and the upper end of the sand box 100 is slightly contracted, so that the sand box 100 after thermal expansion remains in contact with the periphery of the sand mold blank 200, and the space of thermal expansion of the sand box 100 when the molten metal is continuously poured into the sand mold blank 200 is eliminated, and the sand mold blank 200 caused by the sand box 100 having a greater expansion coefficient than the sand mold blank 200 after heating is reduced. The sand box 100 loses its support and restriction function, and the shrinkage and locking hole phenomenon caused by the solidification process of the molten metal is prevented.
[0052] A pouring bucket 8 is used to hold molten metal. The pouring bucket 8 is fixedly arranged at the upper end of the door frame 5. A liquid outlet is arranged at the bottom of the pouring bucket 8. The liquid outlet is controlled by a controllable valve to be opened or closed;
[0053] The pouring ladle 8 is fixed to the gantry 5 , and the pouring ladle 8 is not driven by the gantry 5 to be raised or lowered.
[0054] The clamping mechanism 9 is arranged on the left and right sides of the gantry 5. The clamping mechanism 9 is driven by the corresponding second driving cylinder 901 to clamp or release the corresponding sand box 100 on the left and right sides of the gantry 5. After the clamping mechanism 9 clamps the sand box 100, the center line of the sand box coincides with the center line of the fork frame 6;
[0055] In this embodiment, when the sand box 100 is lifted by the fork 7, there may be a deviation between the placement position of the sand box 100 and the preset placement point, and when the gantry 5 is driven to the corresponding sand box 100, the position to which the gantry 5 is driven may be different from the preset position, so that the position of the sand box 100 and the pouring bucket 8 is different. Therefore, it is necessary to quote the sand box 100 through the clamping mechanism 9 to reposition it. During the clamping process, the clamping mechanism 9 can limit the relative left and right position between the sand box 100 and the gantry 5, so as to adjust the sand box 100 to a fixed position in front of the gantry 5. Since the pouring bucket 8 is fixedly arranged on the gantry 5, after the clamping action of the clamping mechanism 9, the sand box 100 is adjusted to a fixed relative position with the pouring bucket 8, so that as long as the position of the liquid outlet of the pouring bucket 8 is pre-set, the liquid inlet of the sand mold blank 200 in the sand box 100 can be accurately poured.
[0056] Control system, used to control each component.
[0057] In this embodiment, the gantry 5 can be driven by corresponding transverse and longitudinal movement mechanisms, such as a crane, a ground crane and the like, so that the pouring device can be driven to the sand box 100 in position for pouring.
[0058] Furthermore, the clamping mechanism 9 includes a group of rollers, which are respectively arranged on the left and right sides of the door frame 5. When the rollers clamp the corresponding sand box 100, the rollers roll in contact with the corresponding sand box, thereby allowing the fork 7 and the fork frame 6 to rise.
[0059] In this embodiment, since the subsequent fork 7 will be close to the lower middle part of the sand box 100, the sand box 100 is easy to lose balance at this time. At this time, the clamping mechanism 9 can also realize the function of left and right positioning to prevent the sand box 100 from losing balance and tipping over. In addition, the rollers are respectively arranged on the left and right sides of the door frame 5, and the door frame 5 is fixedly arranged on the door frame 5. Therefore, during the lifting and lowering process of the fork 7, the clamping mechanism 9 does not move up and down with the fork 7 or the fork frame 6. When the sand box 100 in the clamping state is lifted or lowered by the fork 7, the rolling action of the rollers allows the sand box 100 to rise or fall smoothly.
[0060] Furthermore, the rollers are driven by corresponding cylinders respectively, and a group of the cylinders are symmetrically arranged about the center line of the fork frame 6, wherein the rod cavity of one of the cylinders is connected to the rodless cavity of the other cylinder, so that the two cylinders move synchronously.
[0061] In this embodiment, a group of the oil cylinders are arranged symmetrically about the center line of the fork frame 6, and the oil cylinders are contracted to drive the rollers to clamp the sand box 100. The two oil cylinders are extended or contracted synchronously, thereby driving the rollers to open or clamp. Under the premise of the synchronous movement of the two oil cylinders, the area surrounded by the two rollers is always symmetrical about the center line of the fork frame 6. The purpose of this is to adjust the sand box 100 after clamping to be placed on the fork 7 in a state of being symmetrical about the center line of the fork frame 6.
[0062] Furthermore, the oil cylinder is provided with a hydraulic sensor.
[0063] In this embodiment, the hydraulic sensor senses the oil pressure of the oil cylinder, so that the control system controls the clamping force of the roller on the sand box 100 to prevent the sand box 100 from being damaged due to excessive oil pressure in the oil cylinder.
[0064] Furthermore, a plurality of rollers 703 are provided on the transverse portion of the fork 7 , and the axial direction of the rollers 703 is the same as the extending direction of the transverse portion of the fork 7 .
[0065] In this embodiment, by means of the roller 703 and its axial setting, when the fork 7 is extended under the sand box 100, a rolling connection is provided for the process of opening or closing the fork 7, thereby realizing the opening or closing of the fork 7 when the fork 7 lifts the sand box 100. If there is no roller 703, the fork 7 needs to put down the sand box 100 before opening or closing, and the overall working efficiency is improved by means of the roller 703.
[0066] Furthermore, the airbag 702 is disposed on the left and right sides of the roller 703 .
[0067] Through this structure, the airbag 702 can be distributed more widely in the left and right directions, so that when the fork 7 is close, only the central airbag 702 is inflated, and the supporting force F of the airbag 702 is more centered in the middle below the sand box 100. When the fork 7 is opened, only the outer airbag 702 is inflated, and the supporting force F of the airbag 702 is more dispersed on both sides below the sand box 100, thereby improving the effect of the airbag 702.
[0068] Furthermore, a pressure sensor (not marked) is provided on the front side of the vertical portion of the fork 7. After the fork 7 is extended under the corresponding sand box 100, the sand box 100 presses against the pressure sensor. When the data of the pressure sensor reaches a pressure threshold, the control system determines that the fork 7 is extended into place.
[0069] In this embodiment, the left and right position adjustment of the sand box 100 is realized by the clamping mechanism 9, and now the front and rear position of the fork 7 and the sand box 100 can be determined by the pressure sensor. When the fork 7 is extended under the sand box 100, if the fork 7 is not fully extended under the sand box 100, the pressure sensor of the fork 7 cannot be against the sand box 100, and the data of the pressure sensor is 0 at this time. The control system controls the beam bridge 2 to continue to move in the front and rear direction, so that it is further extended under the sand box 100 until the data of the pressure sensor reaches the pressure threshold, indicating that the fork 7 is fully extended under the sand box 100, thereby accurately determining the front and rear position between the sand box 100 and the fork 7. Since the pouring bucket 8 is fixed to the gantry 5, the front and rear relative position of the pouring bucket 8 and the gantry 5 is determined. Combined with the clamping mechanism 9 mentioned above, the left-right relative position of the sand box 100 and the door frame 5 is accurately determined, thereby limiting the front-to-back and left-to-right relative position of the pouring bucket 8 and the sand box 100. At this time, the liquid outlet of the pouring bucket 8 can be pre-set above the liquid inlet of the sand box 100, and the liquid out of the pouring bucket 8 can be accurately cast in the sand box 100, preventing the liquid outlet of the pouring bucket 8 from deviating from the liquid inlet of the sand box 100, causing the molten metal to flush the edge of the sand mold blank 200, thereby causing the sand to fall off.
[0070] Furthermore, the clamping mechanism 9 is arranged at a position of the door frame 5 corresponding to the lower half of the sand box 100 .
[0071] In this embodiment, since the clamping mechanism 9 can clamp and adjust the position of the sand box 100, and it is necessary to realize that the sand box 100 changes in shape when the air bag 702 lifts the corresponding position of the sand box 100, the clamping mechanism 9 needs to be clamped at the lower half of the sand box 100. If the clamping mechanism 9 is clamped at the upper half of the sand box 100, the clamping mechanism 9 will limit the expansion of the upper opening of the sand box 100, thereby losing the technical effect required by this embodiment.
[0072] It should be pointed out that the implementation principle and technical effects of this embodiment are the same as those of Embodiment 1. For the sake of brief description, for matters not mentioned in this embodiment, reference may be made to the corresponding contents in Embodiment 1.
[0073] When working,
[0074] It should be noted that in the claims, any reference signs placed between brackets shall not be constructed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The utility model can be implemented with the aid of hardware comprising several different components and with the aid of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same hardware item. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.
[0075] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.
[0076] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.
Claims
1. A high-precision pouring device, characterized in that: include: A gantry, wherein the gantry is provided with a lifting mechanism; A fork frame connected to the gantry, the fork frame is driven by the lifting mechanism, and a fork connecting rod is provided at the front end of the fork frame; There are two forks, one on the left and one on the right, respectively connected to the fork connecting rod. The forks are driven by the corresponding first driving cylinders to open or close on both sides of the center line of the fork frame. The upper end surface of the fork is provided with an airbag, which is inflated or deflated by a corresponding inflation device. After the airbag is inflated, it protrudes from the upper surface of the transverse part of the fork. After the forks are brought together, the airbag is inflated to support the lower middle part of the corresponding sand box. After the forks are opened, the airbag is inflated to support the lower sides of the corresponding sand box; A pouring bucket, used for holding molten metal, the pouring bucket is fixedly arranged at the upper end of the door frame, and a liquid outlet is arranged at the bottom of the pouring bucket, and the liquid outlet is controlled by a controllable valve to be opened or closed; Control system, used to control each component.
2. A high-precision pouring device according to claim 1, characterized in that: It includes a clamping mechanism, which is arranged on the left and right sides of the gantry. The clamping mechanism is driven by the corresponding second driving cylinder to clamp or release the corresponding sand box on the left and right sides of the gantry. After the clamping mechanism clamps the sand box, the center line of the sand box coincides with the center line of the fork frame.
3. A high-precision pouring device according to claim 2, characterized in that: The clamping mechanism includes a group of rollers, which are respectively arranged on the left and right sides of the door frame. When the rollers clamp the corresponding sand box, the rollers roll in contact with the corresponding sand box, so that the fork and the fork frame can rise.
4. A high-precision pouring device according to claim 3, characterized in that: The rollers are driven by corresponding cylinders respectively. A group of the cylinders are arranged symmetrically about the center line of the fork frame. The rod cavity of one of the cylinders is connected to the rodless cavity of the other cylinder, so that the two cylinders move synchronously.
5. A high-precision pouring device according to claim 4, characterized in that: The oil cylinder is provided with a hydraulic pressure sensor.
6. A high-precision pouring device according to claim 1, characterized in that: The airbags are arranged at the left and right ends of the upper end surface of the transverse portion of the fork. When the forks are brought together, the airbags close to the center line of the fork frame are inflated to support the lower middle part of the corresponding sand box. When the forks are opened, the airbags away from the center line of the fork frame are inflated to support the lower sides of the corresponding sand box.
7. A high-precision pouring device according to claim 6, characterized in that: The transverse portion of the fork is provided with a plurality of rollers, and the axial direction of the rollers is the same as the extending direction of the transverse portion of the fork.
8. A high-precision pouring device according to claim 7, characterized in that: The airbags are arranged on the left and right sides of the roller.
9. A high-precision pouring device according to claim 1, characterized in that: A pressure sensor is provided on the front side of the vertical portion of the fork. After the fork is extended under the corresponding sand box, the sand box presses against the pressure sensor. When the data of the pressure sensor reaches a pressure threshold, the control system determines that the fork is extended into place.
10. A high-precision pouring device according to claim 2, characterized in that: The clamping mechanism is arranged at a position of the door frame corresponding to the lower half of the sand box.