Pusher device for compact electron beam cold hearth furnace and method for determining the pushing speed thereof

Abstract

Provided are a compact pushing device for an electron beam cold hearth furnace and a pushing speed determination method thereof. Two ends of a first feeding device are connected with a left fixed support and a right fixed support respectively above a flat rod between the left fixed support and the right fixed support. A moving part of the first feeding device is connected with the flat rod through a guide transmission connecting device and can move along the length direction of the flat rod. A second feeding device is connected with the guide transmission connecting device at the right end below the flat rod. A moving trolley is arranged below the second feeding device, and the left end of the second feeding device is connected with the left end of the moving trolley. The moving part of the second feeding device is fixedly connected with the right end of a pushing rod arranged in the moving trolley and movable along the length direction of the moving trolley. The pushing structure is optimized, the pushing device adopts a multi-stage feeding combined pushing mode, the length of the pushing structure is greatly shortened, the occupied area of the pushing structure is reduced, the rigidity and stability of the pushing structure are ensured, and the pushing process is stable and reliable.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electron beam cold hearth melting furnace, and particularly relates to a compact electron beam cold hearth furnace pushing device and a pushing speed determination method thereof. BACKGROUND

[0002] The electron beam melting furnace is a device for converting kinetic energy of high-speed electron beam into heat energy as a heat source for metal smelting in a high vacuum environment, and is widely applied to the smelting field of titanium and titanium alloy. The larger the ingot is, the higher the efficiency of the electron beam cold hearth melting furnace is, and the size of the ingot depends on the amount of the charging. At present, the commonly used electron beam cold hearth melting furnace adopts the mode of loading the metal raw material into a movable cylinder, then sealing the vacuum cylinder, and then pushing the metal raw material into the smelting area through the pushing device in a vacuum state, so that a pushing mode with a large stroke and stable operation is required. If the length of the pushing device is large, on the one hand, a large space is occupied, and on the other hand, the poor rigidity of the long pushing device is prone to failure in the use process. Therefore, it is necessary to improve the above problems. SUMMARY

[0003] The application solves the technical problem of providing a compact electron beam cold hearth furnace pushing device and a using method thereof. By optimizing the pushing structure and adopting the multi-stage feeding combined pushing mode, the length of the pushing structure is greatly reduced, the occupied area of the pushing structure is reduced, the rigidity and stability of the pushing structure are ensured, the structure is simple, the design is novel, the pushing process is stable and reliable, and the application has high use value.

[0004] The application adopts the technical scheme of a compact electron beam cold hearth furnace pushing device, which comprises a left fixed support and a right fixed support in a door-shaped structure, a flat rod is arranged between the left fixed support and the right fixed support, a first-stage feeding device is arranged above the flat rod and connected with the left fixed support and the right fixed support at both ends, a moving part of the first-stage feeding device is adaptively connected with the flat rod through a guide transmission connecting device and can move along the length direction of the flat rod, a second-stage feeding device is arranged below the flat rod and adaptively connected with the guide transmission connecting device at the right end, a moving trolley that can move out of or into the left fixed support is arranged below the second-stage feeding device, the left end of the second-stage feeding device is connected with the left end of the moving trolley, the moving part of the second-stage feeding device is fixedly connected with the right end of a push rod arranged in the moving trolley and movable along the length direction of the moving trolley, the moving part of the first-stage feeding device drives the second-stage feeding device and the moving trolley to move left synchronously through the guide transmission connecting device, so as to realize the first-stage feeding of the push rod, and the moving part of the second-stage feeding device drives the push rod to move left along the length direction of the moving trolley, so as to realize the second-stage feeding of the push rod.

[0005] The first feeding device comprises an upper screw rod and an upper nut seat threadedly connected with the upper screw rod, the bottom of the upper nut seat is fixedly connected with the upper end of the guiding transmission connecting device, the left end of the upper screw rod and the flat rod is rotatably installed on the left fixed support through a bearing seat fixed on the inner bottom surface of the upper end of the left fixed support, the right end of the upper screw rod and the flat rod is connected with a fixed gear box supported on the right fixed seat, the input end of the fixed gear box is fixedly connected with the output shaft of the speed reducer motor through a shaft coupling, and when the speed reducer motor drives the upper screw rod and the flat rod to synchronously rotate through the fixed gear box, the upper nut seat drives the second feeding device, the moving trolley and the push rod to synchronously move left through the guiding transmission connecting device.

[0006] Further, the fixed gear box comprises a fixed box supported in the right fixed seat and an upper driven gear and a driving gear distributed in the fixed box from top to bottom, the right end of the upper screw rod and the flat rod is rotatably installed on the fixed box through bearing seat assemblies arranged in the upper half and the lower half of the left and right side walls of the fixed box, the upper driven gear is fixedly connected with the upper screw rod, and the driving gear meshing with the upper driven gear is fixed on the flat rod, and the right end of the flat rod extends out of the fixed box and is fixedly connected with the output shaft of the speed reducer motor through a shaft coupling.

[0007] Further, the guiding transmission connecting device comprises a movable gear box and a guide sleeve, bearing seat assembly two of the left and right side walls of the movable gear box from the upper half and the lower half are rotatably connected with the guide sleeve on the flat rod and the right end of the lower screw rod in the second feeding device with a gap, the lower driven gear and the middle gear distributed in the movable gear box from bottom to top are fixedly connected with the guide sleeve and the right end of the lower screw rod, and the lower screw rod in the second feeding device is driven to rotate by the flat rod and the guide sleeve through the middle gear and the lower driven gear.

[0008] Further, the flat rod is a rod-shaped structure with a flat surface milled on the upper and lower outer walls of a circular long rod, and the cross-sectional shape of the inner hole of the guide sleeve is the same as the cross-sectional shape of the flat rod.

[0009] Further, the second feeding device comprises a lower screw rod and a lower nut seat adaptively connected with the lower screw rod, a connecting piece arranged on the same side of the push rod and fixedly connected with the lower nut seat is sleeved on the lower screw rod, and the outer end of the lower end of the connecting piece is fixedly connected with the right end of the push rod.

[0010] Further, the mobile trolley comprises two groups of symmetrically arranged welding frames, upper left ends of the two groups of welding frames are fixedly connected as a whole through an end plate, and lower right ends of the two groups of welding frames are fixedly connected as a whole through a U-shaped connecting plate with a notch facing upward, a region between the two groups of welding frames forms a guide groove with a guiding function, a push rod is adapted to the guide groove and can move left and right along the length direction of the guide groove, a bearing seat two is fixedly connected to the left end of the lower lead screw in the secondary feeding device on the bottom surface of the end plate, mobile wheels are installed on the bottom surfaces of both ends of the welding frame, and guide wheels are installed on both ends of the welding frame with wheel surfaces facing outward and are adapted to the corresponding side guide rails to guide the mobile trolley during movement.

[0011] Further, the push rod comprises a push plate and an open steel pipe, the open steel pipe has a C-shaped long pipe structure with an opening facing upward, link rods are fixedly connected to both sides of the outer wall of the left end of the open steel pipe, guide wheels adapted to the bottom groove surface on the same side of the guide groove are installed on the link rods, the push plate is fixed to the left end of the open steel pipe, the right end of the open steel pipe is fixedly connected to the lower nut seat through a connecting piece, and the lower end of the bearing seat two and the lower lead screw are located inside the open steel pipe.

[0012] Further, the connecting piece comprises a C-shaped plate with an opening facing upward and a connecting plate fixedly connected to the right end of the C-shaped plate, the connecting plate is sleeved on the lower lead screw and fixedly connected to the lower nut seat, a circular-arc-shaped reinforcing plate is fixedly connected to the inner wall of the left end of the open steel pipe, and the left end of the C-shaped plate is positioned in the middle and both ends of the left end of the circular-arc-shaped reinforcing plate through a plurality of positioning blocks fixedly connected to the inner wall of the open steel pipe.

[0013] The method for determining the pushing speed of the compact electron beam cold hearth pushing device comprises the following steps:

[0014] 1) Determination of the gear: the size and the number of teeth of the driving gear fixed to the flat shaft in the fixed gear box and the driven gear fixed to the left end of the upper lead screw are equal, and the size and the number of teeth of the lower driven gear and the middle gear in the guiding transmission connecting device are equal;

[0015] 2) Determination of the feeding speed of the upper nut seat in the primary feeding device: assuming that the lead of the upper lead screw in the primary feeding device is P, when the flat shaft rotates at a speed of w revolutions per minute through the shaft coupling after the reduction motor is started, the feeding speed of the upper nut seat in the primary feeding device is calculated according to the following formula:

[0016]

[0017] Since the secondary feeding device, the mobile trolley and the push rod are subjected to primary feeding through the guiding transmission connecting device driven by the upper nut in the primary feeding device, the primary feeding speed of the secondary feeding device, the mobile trolley and the push rod is ;

[0018] 3) The feeding speed of the lower nut seat in the secondary feeding device is determined: the pitch of the lower lead screw in the secondary feeding device is also P, the lower lead screw also rotates at the speed of w revolutions per minute, and the speed of the lower nut seat of the secondary feeding device relative to the moving trolley is , and the specific calculation is as follows:

[0019]

[0020] Then, under the driving of the primary feeding device, the feeding speed of the lower nut seat is , and the calculation formula is as follows:

[0021]

[0022] ;

[0023] 4) The determination of the pushing rod pushing speed: since the lower nut seat and the left end of the pushing rod 5 are fixedly connected through the connecting piece, the pushing speed of the pushing rod is the same as the feeding speed of the lower nut seat, and the pushing speed of the pushing rod is .

[0024] Compared with the prior art, the advantages of the present application are:

[0025] 1) The technical scheme sets the fixed gear box on the right fixed support, and drives the flat shaft and the upper lead screw to rotate through the fixed gear box driven by the speed reducer motor, thereby providing conditions for the feeding movement of the secondary feeding device and the moving trolley along the length direction of the flat shaft;

[0026] 2) The technical scheme adopts the cooperation structure of the guide sleeve and the flat rod, so that the flat rod drives the guide sleeve and the middle gear fixedly connected with the guide sleeve to rotate synchronously in the rotating process, thereby driving the lower lead screw in the secondary feeding device to rotate, providing conditions for the horizontal feeding of the pushing rod driven by the lower nut seat and rolling on the moving trolley, thereby realizing the secondary pushing of the pushing rod to the movable barrel;

[0027] 3) The opening steel pipe in the pushing rod adopts a C-shaped long pipe structure with the opening upward, which can effectively avoid the interference with the rotating installation part of the left end of the lower lead screw during the moving process, and realize the guiding effect in cooperation with the bearing seat two during the extension or retraction process, thereby ensuring the stability of the C-shaped long pipe during the moving process and the compactness of the structure;

[0028] 4) The technical scheme optimizes the pushing structure and adopts a multi-stage feeding combined pushing method, which greatly reduces the length of the pushing structure, reduces the occupied area of the pushing structure, ensures the rigidity and stability of the pushing structure, and has the advantages of simple structure, novel design, stable and reliable pushing process and high use value. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a schematic diagram of the plane structure of the present application;

[0030] Figure 2 It is a schematic diagram of the three-dimensional structure of the present application without the right fixed support installed;

[0031] Figure 3 It is a schematic diagram of the structure of the first feeding device connected with the second feeding device through the guiding transmission connecting device;

[0032] Figure 4 It is a schematic diagram of the connection structure of the push rod and the connecting piece;

[0033] Figure 5 It is a schematic diagram of the Figure 4 A-A sectional view;

[0034] Figure 6 It is a top view of the moving trolley structure of the present application;

[0035] Figure 7 It is a left view of the moving trolley structure of the present application. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings. Figures 1-7 It should be apparent that the described embodiments are only a part of embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present application.

[0037] It should be noted that, in this document, the terms “comprising” and “including” or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or further include elements inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the phrase “comprising a” does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0038] The utility model provides a compact electron beam cold bed furnace pushing device, including left fixed support 1 and right fixed support 2 of door shape structure, be equipped with flat bar 3 between left fixed support 1 and right fixed support 2, the flat bar 3 top is equipped with the first -level feeding device of the both ends connection of left fixed support 1 and right fixed support 2, and the moving part of first -level feeding device is connected with flat bar 3 through guide transmission connecting device 12 and can move along the length direction of flat bar 3, the flat bar 3 below is equipped with the second -level feeding device of the right end adaptation connection of guide transmission connecting device 12, the second -level feeding device below is equipped with the removal or removal in left fixed support 1 of moving trolley 4, and the left end of second -level feeding device is connected with the left end of moving trolley 4, the moving part of second -level feeding device is fixedly connected with the right end of push rod 5 of being arranged in moving trolley 4 and can move along the length direction of moving trolley 4, the moving part of first -level feeding device drives second -level feeding device and moving trolley 4 synchronous left -moving process to realize the first -level feeding of push rod 5 through guide transmission connecting device 12, the moving part of second -level feeding device drives push rod 5 left -moving process along the length direction of moving trolley 4 to realize the secondary feeding of push rod 5.

[0039] As Figures 1-3 The specific structure of the first -level feeding device is as follows: the first -level feeding device includes an upper lead screw 6 and an upper nut seat 7 threadedly connected with the upper lead screw 6, the bottom of the upper nut seat 7 is fixedly connected with the upper end of the guide transmission connecting device 12, the upper lead screw 6 and the left end of the flat bar 3 are rotatably installed on the left fixed support 1 through a bearing seat one 8 fixed to the inner bottom surface of the upper end of the left fixed support 1, the right end of the upper lead screw 6 and the flat bar 3 is connected with a fixed gear box 9 supported on the right fixed support 2, the input end of the fixed gear box 9 is fixedly connected with the output shaft of a speed reducer motor 11 through a shaft coupling 10, and when the upper lead screw 6 and the flat bar 3 are driven to rotate synchronously by the speed reducer motor 11 through the fixed gear box 9, the second -level feeding device and the moving trolley 4 and the push rod 5 are driven to move left synchronously by the upper nut seat 7 through the guide transmission connecting device 12; in the above structure, the fixed gear box 9 is arranged on the right fixed support 2, and the flat bar 3 and the upper lead screw 6 are driven to rotate by the speed reducer motor 11 through the fixed gear box 9, which provides conditions for the feeding movement of the second -level feeding device and the moving trolley 4 along the length direction of the flat bar 3;

[0040] As Figure 3As shown, the specific structure of the fixed gear box 9 is as follows: the fixed gear box 9 includes a fixed box 9-1 supported in the right fixed seat 2 and an upper driven gear 9-2 and a driving gear 9-3 distributed in the fixed box 9-1 from top to bottom, the right end of the upper lead screw 6 and the flat rod 3 are rotatably installed on the fixed box 9-1 through bearing seat assemblies one 9-4 provided on the upper half and the lower half of the left and right two side walls of the fixed box 9-1 respectively, the upper driven gear 9-2 is fixedly connected with the upper lead screw 6, and the driving gear 9-3 engaged with the upper driven gear 9-2 is fixed on the flat rod 3, the right end of the flat rod 3 extends out of the fixed box 9-1 and is fixedly connected with the output shaft of the speed reducer motor 11 through the shaft coupling 10.

[0041] The specific structure of the guide transmission connecting device 12 is as follows: the guide transmission connecting device 12 includes a movable gear box 12-1 and a guide sleeve 12-2, bearing seat assemblies two 12-3 of the upper half and the lower half of the left and right two side walls of the movable gear box 12-1 are rotatably connected with the guide sleeve 12-2 and the right end of the lower lead screw 13 in the secondary feeding device through gap fit on the flat rod 3, the lower driven gear 12-4 and the middle gear 12-5 distributed inside the movable gear box 12-1 from bottom to top are fixedly connected with the guide sleeve 12-2 and the right end of the lower lead screw 13 respectively, and the lower lead screw 13 in the secondary feeding device is driven to rotate by the flat rod 3 and the guide sleeve 12-2 through the middle gear 12-5 and the lower driven gear 12-4; specifically, the flat rod 3 is a rod-shaped structure with flat upper and lower outer walls of a circular long rod, the cross-sectional shape of the inner hole of the guide sleeve 12-2 is the same as that of the flat rod 3, and the matching structure of the guide sleeve 12-2 and the flat rod 3 enables the flat rod 3 to drive the guide sleeve 12-2 and the middle gear 12-5 fixedly connected with the guide sleeve 12-2 to rotate synchronously during rotation, thereby driving the lower lead screw 13 in the secondary feeding device to rotate and providing conditions for the transverse movement of the lower nut seat 14, wherein the guide sleeve 12-2 is made of oil-containing wear-resistant material and can slide along the flat rod 3.

[0042] As shown in Figures 1-3 The specific structure of the secondary feeding device is as follows: the secondary feeding device includes a lower lead screw 13 and a lower nut seat 14 adaptively connected with the lower lead screw 13, a connecting piece 15 provided on the same side of the push rod 5 and fixedly connected with the lower nut seat 14 is sleeved on the lower lead screw 13, and the outer end of the lower end of the connecting piece 15 is fixedly connected with the right end of the push rod 5.

[0043] As shown in Figures 6-7As shown, the specific structure of the moving trolley 4 is as follows: the moving trolley 4 comprises two groups of symmetrically arranged welding frames 4-1, the upper left ends of the two groups of welding frames 4-1 are fixedly connected as a whole through an end plate 4-3, and the lower right ends of the two groups of welding frames 4-1 are fixedly connected as a whole through a U-shaped connecting plate 4-4 which is arranged with a notch upward, the area between the two groups of welding frames 4-1 forms a guide groove 4-2 with a guiding function, and a push rod 5 is adapted to the guide groove 4-2 and can move left and right along the length direction of the guide groove 4-2, the bottom surface of the end plate 4-3 is fixedly provided with a bearing seat two 16 which is rotatably connected with the left end of the lower lead screw 13 in the secondary feeding device, the bottom surfaces of the two ends of the welding frame 4-1 are both provided with moving wheels 4-5, and the two ends of the welding frame 4-1 are provided with guide wheels 4-6 which are arranged with wheel surfaces outward and are adapted to the corresponding side guide rails to guide the moving trolley 4 during movement.

[0044] As shown in the figure, Figures 4-5 The push rod 5 comprises an opening push plate 5-1 and an opening steel pipe 5-2, the cross-sectional shape of the opening steel pipe 5-2 is a C-shaped long pipe structure arranged with an opening upward, the left end of the opening steel pipe 5-2 is fixedly provided with a connecting rod 5-3 on the outer wall of both sides, and the connecting rod 5-3 is provided with a guide wheel 5-4 which is adapted to the bottom groove surface on the same side of the guide groove 4-2, the opening push plate 5-1 is fixed to the left end of the opening steel pipe 5-2, the right end of the opening steel pipe 5-2 is fixedly connected with the lower nut seat 14 through a connecting piece 15, and the lower end of the bearing seat two 16 and the lower lead screw 13 are both located inside the opening steel pipe 5-2; in the above structure, the opening steel pipe 5-2 in the push rod 5 adopts a C-shaped long pipe structure arranged with an opening upward, which can effectively avoid interference with the rotating installation part of the left end of the lower lead screw 13 during movement, and can realize guiding effect in cooperation with the bearing seat two 16 during extension or retraction, thereby ensuring the stability of the C-shaped long pipe 5-2 during movement and the compactness of the structure;

[0045] As shown in the figure, Figure 4 The specific structure of the connecting piece 15 is as follows: the connecting piece 15 comprises a C-shaped plate 15-1 arranged with an opening upward and a connecting plate 15-2 arranged vertically and fixed to the right end of the C-shaped plate 15-1, the connecting plate 15-2 is sleeved on the lower lead screw 13 and is fixedly connected with the lower nut seat 14, the left end of the C-shaped plate 15-1 is fixedly provided with a circular arc reinforcing plate 15-3 on the inner wall of the left end, and the left end of the C-shaped plate 15-1 is positioned at the middle and both ends of the left end of the circular arc reinforcing plate 15-3 through a plurality of positioning blocks 15-4 fixed to the inner wall of the opening steel pipe 5-2.

[0046] The structure works as follows: first, start the reduction motor 11 to drive the flat shaft 3 to rotate through the shaft coupling 10, and then drive the upper lead screw 6 to rotate through the meshing transmission of the driven gear 9-2 and the driving gear 9-3, so that the upper nut seat 7 connected with the upper lead screw 6 moves along the length direction of the upper lead screw 6, at the same time, the guide sleeve 12-2 fixedly connected with the upper nut seat 7 and adapted with the flat shaft 3, the movable gear box 12-1 connected with the guide sleeve 12-2 through bearings, the secondary feeding device connected with the movable gear box 12-1, and the moving trolley 4 connected with the secondary feeding device move synchronously with the upper nut seat 7, and the primary pushing of the push rod 5 on the moving trolley 4 is completed; at this time, due to the matching structure of the flat shaft 3 and the guide sleeve 12-2, the guide sleeve 12-2 has both horizontal movement and rotation, so that the guide sleeve 12-2 drives the lower lead screw 13 to rotate through the meshing transmission of the middle gear 12-5 and the driven gear 12-4, so that the lower nut seat 14 connected with the lower lead screw 13 drives the push rod 5 to move, and the secondary pushing of the push rod 5 is completed; after the pushing process is completed, the rotation direction of the reduction motor 11 is changed to complete the retraction of the push rod 5 in sequence.

[0047] In the structure, the primary feeding device can also be a primary oil cylinder installed at the bottom of the primary support plate, the secondary feeding device can also be a secondary oil cylinder installed at the bottom of the secondary support plate, and the guide transmission connecting device is a guide connecting sleeve, the end of the piston rod of the primary oil cylinder is fixedly connected with the upper end of the guide connecting sleeve matched with the flat shaft 3, the lower end of the guide connecting sleeve is fixedly connected with the upper end of the secondary support plate, and the end of the piston rod of the secondary oil cylinder is fixedly connected with the push rod 5 through the connecting piece 15 in the structure; if the structure of the primary oil cylinder and the secondary oil cylinder is adopted, the primary support plate supporting the primary oil cylinder and the flat shaft 3 are fixedly connected with the left fixed support 1 and the right fixed support 2 respectively, and the secondary support plate supporting the secondary oil cylinder is fixedly connected with the left fixed support 1 and the lower end of the guide connecting sleeve respectively.

[0048] The pushing speed determination method based on the compact electron beam cold hearth pushing device comprises the following steps:

[0049] 1) Gear determination: the size and the number of teeth of the driving gear 9-3 fixed on the flat shaft 3 in the fixed gear box 9 and the driven gear 9-2 fixed on the left end of the upper lead screw 6 are equal, and the size and the number of teeth of the lower driven gear 12-4 and the middle gear 12-5 in the guide transmission connecting device 12 are equal;

[0050] 2) Determination of the feeding speed of the upper nut seat 7 in the primary feeding device: assuming that the lead of the upper lead screw 6 in the primary feeding device is P, when the flat shaft 3 rotates at a speed of w revolutions per minute through the shaft coupling 10 after the reduction motor 11 is started, the feeding speed of the upper nut seat 7 in the primary feeding device is The calculation formula is as follows:

[0051]

[0052] Since the secondary feeding device, the moving trolley 4 and the push rod 5 are driven by the upper nut 7 in the primary feeding device through the guide transmission connection device 12 to perform primary feeding, the primary feeding speed of the secondary feeding device, the moving trolley 4 and the push rod 5 is ;

[0053] 3) Determine the feeding speed of the lower nut seat 14 in the secondary feeding device: assuming that the pitch of the lower lead screw 13 in the secondary feeding device is also P, and the lower lead screw 13 also rotates at a speed of w revolutions per minute, the speed of the lower nut seat 14 of the secondary feeding device relative to the moving trolley 4 is , and the specific calculation is as follows:

[0054]

[0055] Therefore, under the driving of the primary feeding device, the feeding speed of the lower nut seat 14 is , and the calculation formula is as follows:

[0056]

[0057] ;

[0058] Determination of the pushing speed of the push rod 5: since the lower nut seat 14 and the left end of the push rod 5 are fixedly connected through the connecting piece 15, the pushing speed of the push rod 15 is the same as the feeding speed of the lower nut seat 14, and the pushing speed of the push rod 5 is .

[0059] As can be seen from the above, under the premise of the same feeding distance, the overall length of the pushing device is reduced by half by adopting the technical scheme, which provides conditions for the compactification and miniaturization design of the electron beam cold hearth furnace.

[0060] The technical scheme optimizes the pushing structure and adopts a multi-stage feeding combined pushing mode, so that the pushing structure has only half the length of the original pushing structure, greatly reduces the length of the pushing structure, reduces the occupied area of the pushing structure, ensures the rigidity and stability of the pushing structure, has a simple structure, novel design, stable and reliable pushing process, and has high use value.

[0061] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identity of the reference signs therein.

[0062] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A pusher device for a compact electron beam cooling hearth furnace, characterized in that: The device includes a left fixed bracket (1) and a right fixed bracket (2) with a gate-shaped structure. A flat rod (3) is provided between the left fixed bracket (1) and the right fixed bracket (2). A primary feed device is provided above the flat rod (3), with its two ends connected to the left fixed bracket (1) and the right fixed bracket (2) respectively. The moving part of the primary feed device is adapted to the flat rod (3) through a guide transmission connection device (12) and can move along the length of the flat rod (3). A secondary feed device is provided below the flat rod (3), with its right end adapted to the guide transmission connection device (12). Below the secondary feed device is a device that can be moved out or in the left... The mobile carriage (4) is fixed on the support (1), and the left end of the secondary feed device is connected to the left end of the mobile carriage (4). The moving part of the secondary feed device is fixedly connected to the right end of the push rod (5) which is located in the mobile carriage (4) and can move along the length direction of the mobile carriage (4). The moving part of the primary feed device drives the secondary feed device and the mobile carriage (4) to move to the left synchronously through the guide transmission connection device (12) to realize the primary feed of the push rod (5). The moving part of the secondary feed device drives the push rod (5) to move to the left along the length direction of the mobile carriage (4) to realize the secondary feed of the push rod (5). The first-stage feed device includes an upper lead screw (6) and an upper nut seat (7) threadedly connected to the upper lead screw (6). The bottom of the upper nut seat (7) is fixedly connected to the upper end of the guide transmission connection device (12). The left ends of the upper lead screw (6) and the flat rod (3) are rotatably mounted on the left fixed bracket (1) through a bearing seat (8) fixed to the inner bottom surface of the upper end of the left fixed bracket (1). The right ends of the upper lead screw (6) and the flat rod (3) are connected to a fixed gearbox (9) supported on the right fixed seat (2). The input end of the fixed gearbox (9) is fixedly connected to the output shaft of the geared motor (11) through a coupling (10). When the geared motor (11) drives the upper lead screw (6) and the flat rod (3) to rotate synchronously through the fixed gearbox (9), the upper nut seat (7) drives the second-stage feed device, the moving trolley (4), and the push rod (5) to move synchronously to the left through the guide transmission connection device (12). The fixed gearbox (9) includes a fixed box (9-1) supported in the right fixed seat (2) and an upper driven gear (9-2) and a driving gear (9-3) distributed from top to bottom in the fixed box (9-1). The right ends of the upper lead screw (6) and the flat rod (3) are rotatably mounted on the fixed box (9-1) through the bearing seat assembly (9-4) located on the upper and lower halves of the left and right sides of the fixed box (9-1). The upper driven gear (9-2) is fixedly connected to the upper lead screw (6), and the driving gear (9-3) meshing with the upper driven gear (9-2) is fixed on the flat rod (3). The right end of the flat rod (3) extends out of the fixed box (9-1) and is fixedly connected to the output shaft of the geared motor (11) through the coupling (10). The mobile trolley (4) includes two symmetrically arranged welding frames (4-1). The upper left ends of the two welding frames (4-1) are fixedly connected as one unit by end plates (4-3), and the lower right ends of the two welding frames (4-1) are fixedly connected as one unit by U-shaped connecting plates (4-4) with the slots facing upward. The area between the two welding frames (4-1) forms a guide groove (4-2) with a guiding function. The push rod (5) is adapted to the guide groove (4-2) and can move left and right along the length of the guide groove (4-2). The bottom surface of the end plate (4-3) is fixed with a bearing seat (16) that is rotatably connected to the left end of the lower screw (13) in the secondary feed device. The bottom surfaces of both ends of the welding frame (4-1) are equipped with moving wheels (4-5), and the two ends of the welding frame (4-1) are equipped with guide wheels (4-6) with the wheel surfaces facing outward and adapted to the corresponding side guide rails for guiding the mobile trolley (4) during the movement process.

2. The pusher device for the compact electron beam cold hearth furnace according to claim 1, characterized in that: The guide transmission connection device (12) includes a movable gearbox (12-1) and a guide sleeve (12-2). The upper and lower half of the left and right side walls of the movable gearbox (12-1) are rotatably connected to the guide sleeve (12-2) which is clearance-fitted on the flat rod (3) and the right end of the lower screw (13) in the secondary feed device. The lower driven gear (12-4) and the middle gear (12-5) distributed from bottom to top inside the movable gearbox (12-1) are fixedly connected to the guide sleeve (12-2) and the right end of the lower screw (13) respectively. The lower screw (13) in the secondary feed device is driven to rotate by the synchronously rotating flat rod (3) and the guide sleeve (12-2) through the middle gear (12-5) and the lower driven gear (12-4).

3. The pusher device for the compact electron beam cold hearth furnace according to claim 2, characterized in that: The flat rod (3) is a long circular rod with a flat rod structure milled on its upper and lower outer walls. The cross-sectional shape of the inner hole of the guide sleeve (12-2) is the same as that of the flat rod (3).

4. The pusher device for the compact electron beam cold hearth furnace according to claim 3, characterized in that: The secondary feed device includes a lower lead screw (13) and a lower nut seat (14) adapted to the lower lead screw (13). A connector (15) is fitted on the lower lead screw (13) and is fixedly connected to the lower nut seat (14) and located on the same side as the push rod (5). The lower outer end of the connector (15) is fixedly connected to the right end of the push rod (5).

5. The pusher device for a compact electron beam cooling hearth furnace according to claim 1, characterized in that: The push rod (5) includes a push plate (5-1) and an open steel pipe (5-2). The cross-sectional shape of the open steel pipe (5-2) is a C-shaped long pipe structure with the opening facing upward. Connecting rods (5-3) are fixed on the outer walls of the left end of the open steel pipe (5-2), and guide wheels (5-4) adapted to the bottom groove surface on the same side as the guide groove (4-2) are installed on the connecting rods (5-3). The push plate (5-1) is fixed to the left end of the open steel pipe (5-2). The right end of the open steel pipe (5-2) is fixedly connected to the lower nut seat (14) through the connector (15). The lower end of the bearing seat (16) and the lower screw (13) are both located inside the open steel pipe (5-2).

6. The pusher device for a compact electron beam cold hearth furnace according to claim 5, characterized in that: The connector (15) includes a C-shaped plate (15-1) with the opening facing upward and a vertically arranged connecting plate (15-2) fixed to the right end of the C-shaped plate (15-1). The connecting plate (15-2) is fitted onto the lower screw (13) and fixedly connected to the lower nut seat (14). An arc-shaped reinforcing plate (15-3) is fixed on the inner wall of the left end of the open steel pipe (5-2). The middle and both ends of the left end of the C-shaped plate (15-1) fixed to the inner wall of the arc-shaped reinforcing plate (15-3) are respectively positioned by multiple positioning blocks (15-4) fixed on the inner wall of the open steel pipe (5-2).

7. A method for determining the feeding speed of the feeding device for a compact electron beam cold hearth furnace according to any one of claims 4-6, characterized in that... Includes the following steps: 1) Gear selection: Select the driving gear (9-3) fixed on the flat shaft (3) in the fixed gearbox (9) and the driven gear (9-2) fixed on the left end of the upper screw (6) to be equal in size and number of teeth, and the lower driven gear (12-4) and the middle gear (12-5) in the guide transmission connection device (12) to be equal in size and number of teeth; 2) Determine the feed speed of the upper nut seat (7) in the first-stage feed device: Assume the lead of the upper lead screw (6) in the first-stage feed device is P. When the geared motor (11) starts and drives the flat shaft (3) to rotate at a speed of w revolutions / minute through the coupling (10), the feed speed of the upper nut seat (7) in the first-stage feed device is P. The calculation formula is as follows: Since the secondary feed device, the moving trolley (4), and the push rod (5) are driven by the upper nut (7) in the primary feed device through the guide transmission connection device (12) to perform the primary feed, the single feed speed of the secondary feed device, the moving trolley (4), and the push rod (5) is ; 3) Determine the feed speed of the lower nut seat (14) in the secondary feed device: Assume that the lead of the lower lead screw (13) in the secondary feed device is also P, and the lower lead screw (13) rotates at a speed of w revolutions per minute. The speed of the lower nut seat (14) of the secondary feed device relative to the moving carriage (4) is... The specific calculations are as follows: Then, driven by the primary feed device, the feed speed of the lower nut seat (14) is... The calculation formula is as follows: ； 4) Determination of the pushing speed of push rod (5): Since the lower nut seat (14) and the left end of push rod 5 are fixedly connected by connector (15), the pushing speed of push rod (15) is the same as the feed speed of lower nut seat (14). The pushing speed of push rod (5) is .

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