Outer mold machining center for steam turbine valve casting and feeding method of outer mold machining center

Abstract

The outer mold machining center for steam turbine valve casting comprises a machine body, a portal frame and a workbench, and further comprises a pair of telescopic arms which are installed on the two sides of the top face of the workbench face through corresponding sliding grooves. The pair of material lifting and clamping devices are mounted on the adjacent sides of the telescopic arms correspondingly and used for being matched with each other to lift and fix the workpieces; the telescopic control device is used for controlling the pair of telescopic arms to stretch out of or retract into the corresponding sliding grooves, in daily use, by means of the technical scheme, a worker only needs to start the telescopic control device to enable the pair of telescopic arms to stretch out, then the flat trolley is adopted to transfer the wooden outer mold to the position between the outer ends of the pair of telescopic arms, and the wooden outer mold can be conveniently taken out. And then the material lifting clamp is started to lift the wood outer mold and fix the wood outer mold between the pair of telescopic arms, the telescopic arms can retract into the sliding groove under the action of the telescopic control device, a wood outer mold blank is transferred to the position below the portal frame and fixed, the same way is adopted during discharging, feeding and discharging are conducted without the help of external equipment, and operation is convenient.

Description

Technical Field

[0001] The invention relates to the field of steam turbine valve outer mold casting, and in particular to an outer mold processing center for steam turbine valve casting and a feeding method thereof. Background Art

[0002] The casting of turbine valves mainly adopts the traditional sand box casting method. The upper mold sand mold and the lower mold sand mold are formed by the outer mold. When the upper mold and the lower mold are closed, the upper mold sand mold and the lower mold sand mold are closed to form a cavity. The molten metal enters the cavity from the preset flow channel on the upper mold sand mold. After cooling, the valve casting can be obtained. In order to save costs and facilitate manufacturing, the outer mold currently used is made of wood, and the outer mold of the required shape is obtained by cutting in a machining center for use.

[0003] The Chinese invention patent with the announcement number CN118478250B discloses a CNC gantry machining center, which discloses a workbench movably mounted on the top of a fixed box through a movable seat and a guide rail, which can be used to transfer the workpiece to be processed to the bottom of the gantry, which facilitates the loading of materials to a certain extent, but it has the following defects: The workpiece still needs to be placed on the workbench by means of a crane or other handling equipment, and then the workbench moves the workpiece under the gantry. The processed workpiece needs to be transferred outside the workbench, and external handling equipment is also required, which is inconvenient to use. Summary of the invention

[0004] The present invention aims to solve one of the technical problems existing in the prior art.

[0005] The present application provides an external mold processing center for steam turbine valve casting, including a body, a gantry and a workbench, and also includes: A pair of telescopic arms are mounted on both sides of the top surface of the work surface through corresponding slides; A pair of lifting and clamping devices are respectively installed on adjacent sides of each telescopic arm, and are used to cooperate with each other to lift and fix the workpiece; A telescopic control device, which is used to control a pair of telescopic arms to extend / retract into corresponding slideways; A pair of telescopic arms includes: a bottom shell which is slidably mounted in the slideway and has a top and outer ends which are open; The telescopic shell, the lower part of which can be slidably installed in the bottom shell, and the outer end can extend out of the outer end of the inner cavity of the bottom shell; A fixed rack, which is fixed on the side wall of the slideway; A telescopic rack fixed on the side wall of the telescopic shell; A linkage gear is rotatably mounted on the side wall of the bottom shell through a notch and meshes with the fixed rack and the telescopic rack for transmission; When the telescopic control device pushes each bottom shell to slide outward / inward of the slide groove, each linkage gear rotates simultaneously, pushing each telescopic rack and each telescopic shell to slide outward / inward of the bottom shell.

[0006] The telescopic control device includes: The installation cavity is arranged in the machine body, located at the inner end below the workbench, and connected to the slide grooves on both sides; A bidirectional screw rod is installed in the installation cavity by being rotated by a motor; A pair of sliders are movably mounted at both ends of the bidirectional screw through screw holes; A pair of retractable transmission members, used to make a pair of slide blocks respectively connected to the inner ends of the bottom shells; When a pair of sliders move closer to each other or farther away from each other, a pair of retractable transmission members pulls / pushes the corresponding bottom shell to slide toward the inner end / outer end of the slide groove, and shortens / extends itself at the same time.

[0007] The retractable transmission parts include: A fixed plate, which is fixed to the inner end of the bottom shell and has a long transverse groove; A pair of mounting plates, respectively fixed on the upper / lower surface of each slider; A pair of push rods are movably mounted on the surface of each mounting plate facing away from the slider through a pair of movable connecting pieces, and one end of each push rod is transmission-connected to each long transverse groove through a corresponding push slider; A pair of guiding inclined grooves are respectively arranged on the bottom surface and the top surface of the installation cavity, and guiding sliding blocks fixedly connected to the other ends of each push rod are slidably installed inside.

[0008] The movable connecting parts include: A pair of retaining grooves are respectively arranged on the top surface and the bottom surface of the installation cavity; A pair of shell covers are respectively slidably sleeved on the outside of each push rod, one end of which is rotatably connected to the surface of each mounting plate facing away from the slider, and the other end is fixed with a retaining slider which is slidably matched with the corresponding retaining groove.

[0009] The material lifting and clamping device includes: A pair of side grooves are provided on the upper part of the inner side wall of the telescopic shell; A rotating shaft, which is rotated by a motor and installed in the inner cavity of the telescopic shell; Two pairs of sector plates are fixed on the rotating shaft, and each pair of sector plates corresponds to each side groove; A pair of telescopic clamping frames are slidably mounted in the inner cavity of the telescopic shell and the corresponding side grooves; A pair of transmission members are used to connect each pair of sector plates to the corresponding telescopic clamping frame, so that when the outer side of the sector plate is lifted / lowered, the corresponding telescopic supporting frame is controlled to extend / retract into the side groove.

[0010] The material lifting and clamping device also includes: A plurality of notches are respectively arranged on both sides of the top of each side groove; When each fan-shaped plate is lifted, the outer end can enter the corresponding groove.

[0011] Telescopic clamping frame includes: A sliding housing, one end of which is open toward the side groove, and a return spring is installed in the inner cavity; A support plate, which is fixed on the top of the open end of the sliding shell and slidably installed in the side groove; The pressing plate is fixed on the top surface of the supporting plate and slidably installed in the side groove.

[0012] Transmission parts include: A plurality of shifting blocks are fixedly mounted on the inner ends of the sector plates through corresponding support plates; A plurality of pull grooves are respectively arranged at the inner ends of the tops of the two side walls of each sliding shell; When the outer end of the corresponding sector plate is lifted, each shifting block enters the corresponding shifting groove and pushes each sliding shell to slide outward of the side groove.

[0013] Also disclosed is a feeding method for an external mold processing center for steam turbine valve casting, comprising the following steps: S1, controlling the outer ends of a pair of telescopic arms to extend out of corresponding side slots through a telescopic control device; S2. Use a flatbed trolley to move the wooden outer mold blank to be processed between the outer ends of a pair of telescopic arms; S3, start a pair of lifting and clamping devices to lift the wooden outer mold from the flatbed trolley and fix it between a pair of telescopic arms; S4, controlling the outer ends of a pair of telescopic arms to retract into corresponding side grooves through the telescopic control device; S5. A pair of lifting and clamping devices lower the wooden outer mold, and when the bottom surface of the wooden outer mold contacts the work surface, pressure is applied to fix the two sides thereof; S6, the gantry moves, and the spindle drives the tool to cut the wooden outer mold; S7, a pair of lifting and clamping devices lift the wooden outer mold until its bottom surface is off the work surface, and fix it; S8, controlling the outer ends of a pair of telescopic arms to extend out of corresponding side slots through a telescopic control device; S9, a pair of lifting and clamping devices lower the wooden outer mold until the bottom surface of the wooden outer mold contacts the flatbed trolley; S10, a pair of lifting and clamping devices are separated from the contact with the wooden outer mold, and the worker pushes a flatbed cart to remove the processed wooden outer mold.

[0014] The beneficial effects of the present invention are as follows: 1. Through a pair of telescopic arms including a bottom shell, a telescopic shell, a fixed rack, a telescopic rack and a linkage gear, as well as a pair of material lifting and clamping devices and a telescopic control device, the wooden outer mold can be moved from the flat trolley to the table top of the workbench or under the gantry, or the processed wooden outer mold can be transferred to the flat trolley. It is easy to use and does not require external equipment; 2. Through the installation of the mounting cavity, the bidirectional screw, a pair of sliders, and a pair of telescopic control devices each including a fixed plate, a pair of mounting plates, a pair of push rods, a pair of guide sliders, a pair of guide chute grooves, and a pair of movable connecting parts, the cooperation of the pair of guide sliders, the pair of guide chute grooves, and the pair of movable connecting parts can amplify the telescopic stroke of the push rod and reduce its layout space, thereby increasing the telescopic speed of the pair of telescopic arms and improving the loading and unloading efficiency; 3. Through the arrangement of a plurality of side grooves, a pair of rotating shafts, a plurality of fan-shaped plates, a plurality of telescopic clamping frames and a plurality of transmission parts, the wooden outer mold can be lifted from a flat trolley or the table top of a workbench and fixed between a pair of telescopic arms, or the wooden outer mold can be lowered onto a flat trolley, or the wooden outer mold can be lowered onto the table top of a workbench and fixed, and the actions of loading and unloading materials and fixing the wooden outer mold on the table top of the workbench can be realized at the same time, thereby improving work efficiency, eliminating the need to set up clamps, simplifying the equipment structure and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional diagram of the external mold machining center for steam turbine valve casting in the embodiment of the present application (when the outer ends of a pair of telescopic arms are retracted; Figure 2 This is a three-dimensional diagram of the external mold machining center for steam turbine valve casting in the embodiment of the present application (when the outer ends of a pair of telescopic arms are extended; Figure 3 A top view of an external mold processing center for casting a steam turbine valve in an embodiment of the present application; Figure 4 A three-dimensional diagram of a telescopic control device for an external mold machining center for casting a steam turbine valve in an embodiment of the present application (when the outer ends of a pair of telescopic arms are retracted); Figure 5 A three-dimensional diagram of a telescopic control device for an external mold machining center for casting a steam turbine valve in an embodiment of the present application (when the outer ends of a pair of telescopic arms are extended); Figure 6 This is a three-dimensional diagram of the material lifting and clamping device in the embodiment of the present application (when the outer end of the fan-shaped plate is not extended); Figure 7 This is a three-dimensional diagram of the material lifting and clamping device in the embodiment of the present application (when only the outer end of the fan-shaped plate is extended); Figure 8 This is a three-dimensional diagram of the material lifting and clamping device in the embodiment of the present application (when the outer end of the fan-shaped plate is lifted to the highest point); Fig. 9This is a three-dimensional diagram of the material lifting and clamping device in the embodiment of the present application.

[0016] Reference numerals 1-machine body, 2-gantry, 3-workbench, 4-telescopic arm, 41-bottom shell, 42-telescopic shell, 43-fixed rack, 44-telescopic rack, 45-linked gear, 5-slide, 6-lifting clamping device, 61-side groove, 62-rotating shaft, 63-fan-shaped plate, 64-telescopic clamping frame, 641-slide shell, 642-support plate, 643-pressing plate, 65-transmission member, 651-shift block, 652-shift slot, 66-missing slot, 7-telescopic control device, 71-installation cavity, 72-bidirectional screw, 73-slider, 74-telescopic transmission member, 741-fixed plate, 742-long horizontal groove, 743-installation plate, 744-push rod, 745-guide inclined groove, 746-guide slider, 8-movable connecting member, 81-retaining groove, 82-shell cover, 83-retaining slider. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0018] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0019] In the following, in conjunction with the accompanying drawings, the external mold processing center for casting a turbine valve and the feeding method thereof provided in the embodiment of the present application are described in detail through specific embodiments and their application scenarios.

[0020] Embodiment 1: like Figures 1 to 9As shown, the embodiment of the present application provides 1. an external mold machining center for steam turbine valve casting, comprising a machine body 1, a gantry 2 and a workbench 3, and also comprising a pair of telescopic arms 4, which are mounted on both sides of the top surface of the workbench 3 through corresponding slide grooves 5; a pair of lifting and clamping devices 6, which are respectively mounted on adjacent sides of each telescopic arm 4, and are used to cooperate with each other to lift and fix the workpiece; a telescopic control device 7, which is used to control the pair of telescopic arms 4 to extend / retract the corresponding slide grooves 5; the pair of telescopic arms 4 each include: a bottom shell 41, which can be slidably mounted in the slide groove 5, and the top and outer ends are open; a telescopic The retractable shell 42, whose lower part can be slidably installed in the bottom shell 41, and the outer end can extend out of the outer end of the inner cavity of the bottom shell 41; the fixed rack 43, which is fixed on the side wall of the slide groove 5; the telescopic rack 44, which is fixed on the side wall of the telescopic shell 42; the linkage gear 45, which is rotatably installed on the side wall of the bottom shell 41 through the notch, meshing with the fixed rack 43 and the telescopic rack 44 for transmission. When the telescopic control device 7 pushes each bottom shell 41 to slide outside / inside the slide groove 5, each linkage gear 45 rotates at the same time, pushing each telescopic rack 44 and each telescopic shell 42 to slide outside / inside the bottom shell 41.

[0021] Also disclosed is a feeding method for an external mold processing center for steam turbine valve casting, comprising the following steps: S1, controlling the outer ends of a pair of telescopic arms 4 to extend out of the corresponding side slots 61 through the telescopic control device 7; S2, using a flatbed trolley to move the wooden outer mold blank to be processed between the outer ends of a pair of telescopic arms 4; S3, start a pair of lifting and clamping devices 6, lift the wooden outer mold from the flatbed trolley and fix it between a pair of telescopic arms 4; S4, controlling the outer ends of a pair of telescopic arms 4 to retract into corresponding side grooves 61 through the telescopic control device 7; S5, a pair of lifting and clamping devices 6 put down the wooden outer mold, and when the bottom surface of the wooden outer mold contacts the three surfaces of the workbench, press and fix the two sides thereof; S6, gantry 2 moves, and the spindle drives the tool to cut the wooden outer mold; S7, a pair of lifting and clamping devices 6 lift the wooden outer mold until its bottom surface is separated from the three surfaces of the workbench, and fix it; S8, controlling the outer ends of a pair of telescopic arms 4 to extend out of the corresponding side slots 61 through the telescopic control device 7; S9, a pair of lifting and clamping devices 6 lower the wooden outer mold until the bottom surface of the wooden outer mold contacts the flatbed trolley; S10, a pair of lifting and clamping devices 6 are separated from the contact with the wooden outer mold, and the worker pushes the flatbed cart to remove the processed wooden outer mold.

[0022] In this embodiment of the present application, due to the adoption of the above-mentioned structure and method, the worker only needs to transfer the wooden outer mold through the flatbed trolley between the extended pair of telescopic shells 42, and then start the pair of lifting and clamping devices 6 to lift the wooden outer mold off the flatbed trolley. After the bottom surface of the wooden outer mold is higher than the surface of the workbench 3, the pair of lifting and clamping devices 6 respectively press the wooden outer mold from both sides to fix it between the pair of telescopic shells 42, and then the telescopic control device 7 is operated to make the pair of telescopic shells 42 and the pair of bottom shells 41 move into the slide groove 5, and the linkage gear 45 moves with the bottom shell 41, while the fixed rack 43 remains in place, and then it can cooperate with the movable telescopic rack 44 to push the telescopic shell 42 to retract into the bottom shell 41 until the wooden outer mold is moved above the workbench 3 and below the gantry 2, and then the telescopic control device 7 stops running, and each lifting device is stopped. The material clamping device 6 is actuated to lower the wooden outer mold onto the table top of the workbench 3 and test pressure on both sides to fix it for easy processing. After the processing is completed, each material lifting and clamping device 6 is actuated again to lift the processed wooden outer mold to the table top away from the workbench 3 and fix it. The telescopic control device 7 is operated to make a pair of telescopic shells 42 and a pair of bottom shells 41 slide outward from the slide groove 5, and the linkage gear 45 moves with the bottom shell 41, while the fixed rack 43 remains in a fixed position, and then can cooperate with the movable telescopic rack 44 to push the telescopic shell 42 to extend outward from the bottom shell 41, and most of the pair of telescopic shells 42 will extend outward from the corresponding bottom shell 41 until the wooden outer mold is completely away from the table top of the workbench 3, the telescopic control device 7 stops, and a pair of material lifting and clamping devices 6 are actuated to lower the wooden outer mold onto the flatbed trolley, and the staff can remove the wooden outer mold by pulling the flatbed trolley.

[0023] Embodiment 2: like Figures 4 to 5 As shown, in this embodiment, in addition to the structural features of the aforementioned embodiments, the telescopic control device 7 includes an installation cavity 71, which is arranged in the body 1, located at the inner end below the workbench 3, and connected to the slide grooves 5 on both sides; a bidirectional screw 72, which is installed in the installation cavity 71 by the rotation of a motor; a pair of sliders 73, which are movably installed at both ends of the bidirectional screw 72 through screw holes; a pair of telescopic transmission members 74, which are used to make the pair of sliders 73 respectively connected to the inner ends of each bottom shell 41; wherein, when the pair of sliders 73 approach / move away from each other, the pair of telescopic transmission members 74 pulls / pushes the corresponding bottom shell 41 to slide toward the inner end / outer end of the slide groove 5, and shortens / extends itself at the same time.

[0024] Furthermore, the retractable transmission member 74 includes a fixed plate 741, which is fixed at the inner end of the bottom shell 41 and has a long transverse groove 742; a pair of mounting plates 743, which are respectively fixed on the upper / lower surface of each slider 73; a pair of push rods 744, which are movably mounted on the surface of each mounting plate 743 facing away from the slider 73 through a pair of movable connecting parts 8, and one end is respectively transmission-connected to each long transverse groove 742 through a corresponding push slider; a pair of guide inclined grooves 745, which are respectively arranged on the bottom and top surfaces of the mounting cavity 71, and guide sliders 746 fixed to the other end of each push rod 744 are slidably mounted inside.

[0025] Furthermore, the movable connecting member 8 includes a pair of retaining grooves 81, which are respectively arranged on the top surface and the bottom surface of the mounting cavity 71; a pair of shell covers 82, which are respectively slidably mounted on the outside of each push rod 744, one end of which is rotatably connected to the surface of each mounting plate 743 facing away from the slider 73, and the other end is fixed with a retaining slider 83 that slides with the corresponding retaining groove 81.

[0026] In this embodiment of the present application, due to the adoption of the above-mentioned structure, when the bottom shell 41 needs to slide out of the slide groove 5, the bidirectional screw 72 is driven by the corresponding motor to rotate, so that the pair of sliders 73, the pair of mounting plates 743, the pair of shell covers 82 and the pair of push rods 744 move away from each other, and the retaining slider 83 arranged at the other end of each shell cover 82 slides toward the front end of the corresponding retaining groove 81, so that in the process of the pair of shell covers 82 moving away from each other, the distance between one end of the corresponding retaining groove 81 remains unchanged, and the distance between the other end increases, and the distance between each other The angle of the pair of push rods 744 decreases, and the guide slider 746 away from the bottom shell 41 end will slide toward the front end of the corresponding guide inclined groove 745 during the process of moving away from each other, pushing the corresponding push rod 744 to slide in the direction of the outside of the slide groove 5 in the corresponding shell cover 82, and then pushing the corresponding bottom shell 41 to move out of the slide groove 5. During this process, each push slider first slides toward the side wall end of the corresponding long horizontal groove 742 close to the installation cavity 71, and then slides in the opposite direction. During this period, the other end of each push rod 744 maintains a tendency to slide toward the outer end of the slide groove 5; When the bottom shell 41 needs to slide into the slide groove 5, or when the bottom shell 41 needs to slide out of the slide groove 5, the bidirectional screw 72 is driven by the corresponding motor to rotate, so that the pair of sliders 73, the pair of mounting plates 743, the pair of shell covers 82 and the pair of push rods 744 are close to each other, and the retaining slider 83 arranged at the other end of each shell cover 82 slides toward the rear end of the corresponding retaining groove 81, so that in the process of the pair of shell covers 82 approaching each other, the distance between one end of the corresponding retaining groove 81 remains unchanged, and the distance at the other end is reduced, and the angle between them is The guide slider 746 at the end away from the bottom shell 41 will slide toward the rear end of the corresponding guiding inclined groove 745 during the process of a pair of push rods 744 moving away from each other, pulling the corresponding push rod 744 to slide in the direction of the slide groove 5 in the corresponding shell cover 82, and then pulling the corresponding bottom shell 41 to move out of the slide groove 5. During this process, each push slider first slides toward the side wall end of the corresponding long horizontal groove 742 away from the installation cavity 71, and then slides in the opposite direction. During this period, the other end of each push rod 744 maintains a tendency to slide away from the slide groove 5.

[0027] Embodiment 3: like Figures 6 to 9 As shown, in the present embodiment, in addition to the structural features of the aforementioned embodiments, the material lifting and clamping device 6 includes a pair of side grooves 61, which are arranged on the upper part of the inner wall of the telescopic shell 42; a rotating shaft 62, which is installed in the inner cavity of the telescopic shell 42 by a motor; two pairs of fan-shaped plates 63, which are fixed on the rotating shaft 62, and each pair of fan-shaped plates 63 corresponds to each side groove 61; a pair of telescopic clamping frames 64, which are slidably installed in the inner cavity of the telescopic shell 42 and the corresponding side grooves 61; a pair of transmission members 65, which are respectively used to connect each pair of fan-shaped plates 63 with the corresponding telescopic clamping frames 64 in transmission, so that when the outer side of the fan-shaped plate 63 is lifted / lowered, the corresponding telescopic supporting frame is controlled to extend / retract into the side groove 61.

[0028] Furthermore, the material lifting and clamping device 6 also includes a plurality of notches 66 , which are respectively arranged on both sides of the top of each side groove 61 , and the outer end of each fan-shaped plate 63 can enter the corresponding notch 66 when it is lifted.

[0029] Furthermore, the telescopic clamping frame 64 includes a sliding shell 641, which is open at one end toward the side groove 61 and has a return spring installed in the inner cavity; a support plate 642, which is fixed on the top of the open end of the sliding shell 641 and is slidably installed in the side groove 61; and a pressure plate 643, which is fixed on the top surface of the support plate 642 and is slidably installed in the side groove 61.

[0030] Furthermore, the transmission member 65 includes a plurality of shifting blocks 651, which are fixed to the inner ends of each sector plate 63 through corresponding support plates; a plurality of shifting grooves 652, which are respectively arranged at the inner ends of the tops of the two side walls of each sliding shell 641; wherein, when the outer ends of the corresponding sector plates 63 are lifted, each shifting block 651 enters the corresponding shifting groove 652 and pushes each sliding shell 641 to slide outward of the side groove 61.

[0031] In this embodiment of the present application, due to the adoption of the above-mentioned structure, when it is necessary to lift and fix the wooden outer mold from the flatbed trolley, the rotating shaft 62 is driven to rotate by the corresponding motor, driving each fan-shaped plate 63 to rotate, so that the outer end of each fan-shaped plate 63 extends out of the side groove 61 and flips upward. After the outer end of each fan-shaped plate 63 extends out of the side groove 61, it contacts and presses the side wall of the wooden outer mold. As the outer end of each fan-shaped plate 63 continues to flip upward, the wooden outer mold can be lifted upward, and then each shift block 651 enters the corresponding shift groove 652, pushing the corresponding sliding shell 641 close to the corresponding The side groove 61, the return spring is compressed and shortened until the corresponding support plates 642 extend out of the side groove 61 and extend below the bottom surface of the wooden outer mold, and then the outer ends of the fan-shaped plates 63 are separated from the contact with the side wall of the wooden outer mold, and the wooden outer mold is supported by the support plates 642. As the rotating shaft 62 continues to rotate, the fan-shaped plates 63 enter the corresponding slots 66, and the shifting blocks 651 continue to cooperate with the corresponding shifting grooves 652 to push the sliding shells 641 to move until the pressing plates 643 are in contact with the side walls of the wooden outer mold, thus completing the action of lifting and fixing the wooden outer mold from the flatbed trolley; When it is necessary to lower the wooden outer mold onto the flatbed trolley, the rotating shaft 62 is driven to rotate by the corresponding motor, driving the fan-shaped plates 63 to rotate, so that the outer ends of the fan-shaped plates 63 are turned downward toward the lower part of the inner cavity of the telescopic shell 42. During this process, each shift block 651 moves away from the side groove 61, and each return spring releases elastic potential energy to push each sliding shell 641, each support plate 642 and each pressure plate 643 to move into the inner cavity of the telescopic shell 42. When the outer ends of each fan-shaped plate 63 contact the side walls of the wooden outer mold, each support plate 642 is out of contact with the bottom surface of the wooden outer mold. As the rotating shaft 62 continues to rotate, the outer ends of each fan-shaped plate 63 drop to be out of contact with the side walls of the wooden outer mold, and the wooden outer mold can be slowly lowered onto the flatbed trolley.

[0032] When the wooden outer mold needs to be lowered and fixed on the table top of the workbench 3, during the process of each fan-shaped plate 63 flipping downward and lowering the wooden outer mold, when the bottom surface of the wooden outer mold contacts the table top of the workbench 3, the motor matched with the rotating shaft 62 can be stopped. At this time, the outer ends of each fan-shaped plate 63 remain in contact and pressed against the side walls of the wooden outer mold, so that the wooden outer mold can be fixed on the table top of the workbench 3.

[0033] When it is necessary to lift the wooden outer mold from the table top of the workbench 3 and fix it between a pair of telescopic shells 42, the rotating shaft 62 rotates under the action of the motor, driving the outer ends of each fan-shaped plate 63 to lift up, so that the wooden outer mold can be lifted up, and then each shift block 651 enters the corresponding shift groove 652, pushing the corresponding sliding shell 641 close to the corresponding side groove 61, and the return spring is compressed and shortened until the corresponding support plates 642 extend out of the side groove 61 and extend below the bottom surface of the wooden outer mold, and then the outer ends of each fan-shaped plate 63 are separated from the contact with the side wall of the wooden outer mold, and the wooden outer mold is supported by each support plate 642. As the rotating shaft 62 continues to rotate, each fan-shaped plate 63 enters the corresponding missing groove 66, and each shift block 651 continues to cooperate with the corresponding shift groove 652 to push each sliding shell 641 to move until each pressing plate 643 contacts the side wall of the wooden outer mold, thus completing the action of lifting the wooden outer mold from the table top of the workbench 3 and fixing it between a pair of telescopic shells 42.

[0034] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0035] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An external mold machining center for steam turbine valve casting, comprising a body (1), a gantry (2) and a workbench (3), characterized in that: Also includes: A pair of telescopic arms (4) are mounted on both sides of the top surface of the workbench (3) through corresponding slide grooves (5); A pair of material lifting and clamping devices (6), respectively mounted on adjacent sides of each of the telescopic arms (4), for cooperating with each other to lift and fix the workpiece; A telescopic control device (7) for controlling a pair of telescopic arms (4) to extend or retract into corresponding slide slots (5); The pair of telescopic arms (4) each comprises: A bottom shell (41) which is slidably mounted in the slide groove (5) and has a top and an outer end which are both open; A telescopic shell (42), the lower part of which can be slidably mounted in the bottom shell (41), and the outer end of which can extend out of the outer end of the inner cavity of the bottom shell (41); A fixed rack (43) fixedly mounted on a side wall of the slide groove (5); A telescopic rack (44) fixedly mounted on a side wall of the telescopic shell (42); A linkage gear (45) is rotatably mounted on the side wall of the bottom shell (41) through a notch and meshes with the fixed rack (43) and the telescopic rack (44) for transmission; When the telescopic control device (7) pushes each bottom shell (41) to slide outward / inward of the slide groove (5), each linkage gear (45) rotates simultaneously, pushing each telescopic rack (44) and each telescopic shell (42) to slide outward / inward of the bottom shell (41).

2. The external mold processing center for steam turbine valve casting according to claim 1, characterized in that: The telescopic control device (7) comprises: A mounting cavity (71) is arranged in the machine body (1), located at the inner end below the workbench (3), and connected to the slide grooves (5) on both sides; A bidirectional screw (72) is rotatably mounted in the mounting cavity (71) by a motor; A pair of sliders (73) are movably mounted on both ends of the bidirectional screw rod (72) through screw holes; A pair of retractable transmission members (74) for respectively connecting the pair of slide blocks (73) to the inner ends of the bottom shells (41); When the pair of sliders (73) move closer to each other or farther away from each other, the pair of retractable transmission members (74) pulls / pushes the corresponding bottom shell (41) to slide toward the inner end / outer end of the slide groove (5), while shortening / lengthening themselves.

3. The external mold processing center for steam turbine valve casting according to claim 2, characterized in that: The retractable transmission member (74) comprises: A fixing plate (741) fixedly mounted on the inner end of the bottom shell (41) and having a long transverse groove (742); A pair of mounting plates (743) respectively fixed on the upper and lower surfaces of each of the sliding blocks (73); A pair of push rods (744) are movably mounted on the surface of each mounting plate (743) facing away from the slider (73) through a pair of movable connecting members (8), and one end of each push rod is drivingly connected to each long transverse groove (742) through a corresponding push slider; A pair of guide inclined grooves (745) are respectively arranged on the bottom surface and the top surface of the installation cavity (71), and guide sliding blocks (746) fixedly connected to the other ends of the push rods (744) are slidably installed inside.

4. The outer mold machining center for steam turbine valve casting according to claim 3, characterized in that: The movable connecting member (8) comprises: A pair of retaining grooves (81) are respectively arranged on the top surface and the bottom surface of the mounting cavity (71); A pair of shell covers (82) are slidably mounted on the outside of each push rod (744), one end of which is rotatably connected to the surface of each mounting plate (743) facing away from the slider (73), and the other end of which is fixedly provided with a retaining slider (83) slidably matched with the corresponding retaining groove (81).

5. The external mold processing center for steam turbine valve casting according to claim 1, characterized in that: The material lifting and clamping device (6) comprises: A pair of side grooves (61) are arranged on the upper portion of the inner side wall of the telescopic shell (42); A rotating shaft (62) which is rotatably mounted in the inner cavity of the telescopic shell (42) via a motor; Two pairs of sector plates (63) are fixed on the rotating shaft (62), and each pair of sector plates (63) corresponds to each side groove (61); A pair of telescopic clamping frames (64) slidably mounted in the inner cavity of the telescopic shell (42) and in the corresponding side grooves (61); A pair of transmission members (65) are respectively used to connect each pair of the sector plates (63) to the corresponding telescopic clamping frames (64) in a transmission manner, so that when the outer sides of the sector plates (63) are lifted or lowered, the corresponding telescopic supporting frames are controlled to extend or retract into the side grooves (61).

6. The external mold processing center for steam turbine valve casting according to claim 5, characterized in that: The material lifting and clamping device (6) further comprises: A plurality of notches (66) are respectively arranged on both sides of the top of each of the side grooves (61); When each of the fan-shaped plates (63) is lifted, the outer end can enter the corresponding notch (66).

7. The external mold processing center for steam turbine valve casting according to claim 5, characterized in that: The telescopic clamping frame (64) comprises: A sliding housing (641) having one end open toward the side groove (61) and an inner cavity in which a return spring is installed; A support plate (642) fixedly mounted on the top of the open end of the sliding housing (641) and slidably mounted in the side groove (61); The pressing plate (643) is fixedly mounted on the top surface of the supporting plate (642) and is slidably mounted in the side groove (61).

8. The outer mold processing center for steam turbine valve casting according to claim 7, characterized in that: The transmission member (65) comprises: A plurality of shifting blocks (651) are respectively fixed to the inner ends of the sector plates (63) through corresponding support plates; A plurality of pull grooves (652) are respectively arranged at the inner ends of the tops of the two side walls of each of the sliding shells (641); When the outer end of the corresponding sector plate (63) is lifted, each of the shifting blocks (651) enters the corresponding shifting groove (652) and pushes each of the sliding shells (641) to slide outward of the side groove (61).

9. A feeding method for an external mold machining center for casting a steam turbine valve according to claim 1, characterized in that: The following steps are involved: S1, controlling the outer ends of a pair of telescopic arms (4) to extend out of corresponding side grooves (61) through a telescopic control device (7); S2, using a flatbed trolley to move the wooden outer mold blank to be processed between the outer ends of a pair of telescopic arms (4); S3, starting a pair of material lifting and clamping devices (6), lifting the wooden outer mold from the flat trolley and fixing it between a pair of telescopic arms (4); S4, controlling the outer ends of the pair of telescopic arms (4) to retract into corresponding side grooves (61) through the telescopic control device (7); S5, a pair of lifting and clamping devices (6) lower the wooden outer mold, and when the bottom surface of the wooden outer mold contacts the surface of the workbench (3), pressure is applied to fix the two sides thereof; S6, the gantry (2) moves, and the spindle drives the tool to cut the wooden outer mold; S7, a pair of lifting and clamping devices (6) lift the wooden outer mold until its bottom surface is off the workbench (3) and fix it; S8, controlling the outer ends of a pair of telescopic arms (4) to extend out of corresponding side grooves (61) through the telescopic control device (7); S9, a pair of lifting and clamping devices (6) lower the wooden outer mold until the bottom surface of the wooden outer mold contacts the flat trolley; S10, a pair of lifting and clamping devices (6) are separated from the contact with the wooden outer mold, and the worker pushes the flat cart to remove the processed wooden outer mold.

Images