A mold for processing socket steel products

Abstract

The present invention relates to the technical field of molds for processing spigot steel products, and specifically proposes a mold for processing spigot steel products; it includes a round tube conveyor for intermittently conveying round tubes; a mold bracket is fixed on one side of the round tube conveyor, the mold bracket is equipped with a preheating bin, the mold bracket is also equipped with a flaring die, the preheating bin and the flaring die are sequentially distributed in the conveying direction of the round tube conveyor; a pushing mechanism is arranged on the other side of the round tube conveyor; one side of the flaring die is matched with a flaring assembly for completing the flaring of the round tube. The mold provided by the present invention, as a mold system, enriches the existing mold equipment structure, can realize continuous automatic processing operations such as conveying, preheating, flaring forming, and unloading for spigot tubes, improves the molding quality, ensures the consistency and standardization of the processing size of the round tube, meets the processing efficiency requirements, and greatly reduces manpower consumption.

Description

Technical Field

[0001] The invention relates to the technical field of socket steel product processing moulds, and specifically proposes a mould for processing socket steel products. Background Art

[0002] The spigot pipe is a common spigot steel product, which is widely used in water supply and drainage systems, heating systems, air conditioning systems, chemical pipelines and many other fields. The steel spigot pipe is generally a rolled round pipe material, and is usually expanded to form a socket with an enlarged radius at one end of the pipe. During the pipeline construction and assembly process, the socket is used to cooperate with other pipes or accessories for insertion.

[0003] The processing technology of expansion forming is simple. Under the existing technology, a special processing mold is generally used to expand the socket of the socket tube. In the processing mold used, at least a expansion core rod is provided for extending into the tube for expansion forming. In order to improve the forming quality, some are also equipped with a forming die in conjunction with the expansion core rod. When expanding, the socket tube extends into the forming die, and the forming die is used to constrain the outer contour of the socket tube.

[0004] In order to improve the simplicity and speed of pipeline connection or subsequent disassembly, spigot pipes are mostly used in pipeline systems with small diameter pipe openings. The pipeline volume is relatively small. Therefore, in existing processing molds, the loading and unloading of pipe fittings are basically completed manually, but the following problems are obviously present in the processing process.

[0005] 1) For each pipe fitting, it is necessary to manually place the pipe fitting in the corresponding positioning groove before processing. After processing, it needs to be manually removed. For the processing mold equipped with a forming die, the expanded section of the receiving interface forms a step relative to the original pipe fitting part. When unloading, the pipe needs to be lifted up before it can be pulled out of the forming die, which increases the difficulty of unloading and is actually more laborious.

[0006] 2) In order to ensure the standardization of the length of the pipe receiving section and facilitate subsequent standardized construction, when manually placing pipe fittings, it is generally necessary to manually determine the placement of the pipe fittings. However, there will inevitably be dimensional deviations each time the manual positioning is performed with the naked eye.

[0007] 3) In the existing processing molds, the corresponding pipe preheating structure is generally not set, so the fluidity of the pipe material is poor during the expansion process, and it is easy to cause wrinkles, cracks and other molding defects on the pipe wall of the receiving section. Summary of the invention

[0008] In order to solve the above problems, the present invention provides a mold for processing a spigot steel product, which is used to solve the problems mentioned in the above background technology.

[0009] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme to achieve it: a mold for processing plug steel products, including a round tube conveyor for intermittently conveying round tubes; a mold bracket is fixed on one side of the round tube conveyor, and the mold bracket is equipped with a preheating bin for preheating the end of the round tube to be expanded, and the mold bracket is also equipped with a expanding die, and the preheating bin and the expanding die are distributed in sequence in the conveying direction of the round tube conveyor; a pushing mechanism is provided on the other side of the round tube conveyor to synchronously push two round tubes and move the two round tubes to the preheating bin and the expanding die respectively; a expanding component is provided on one side of the expanding die to cooperate with it to complete the expansion of the round tube.

[0010] The flaring assembly includes a flaring core rod that is movable along the central axis direction of the flaring die; the flaring die includes an upper die portion and a lower die portion that are sequentially distributed up and down, and the upper die portion and the lower die portion are both vertically driven to slide and be installed on a mold bracket, and the lower die portion is equipped with a locking assembly that cooperates with the mold bracket to lock, and when the upper die portion and the lower die portion are in upper and lower mold contact and the locking assembly cooperates with the mold bracket to lock, the central axis of the flaring die and the central axis of the flaring core rod are in an overlapping state.

[0011] Both the upper die portion and the lower die portion are equipped with self-adaptive block assemblies for positioning the expanded end of the round tube on the side end surfaces facing the expanding core rod, and the two self-adaptive block assemblies are arranged vertically symmetrically. Before the expanding core rod extends into the round tube, the expanding core rod drives the two self-adaptive block assemblies to automatically avoid the round tube opening.

[0012] Preferably, the preheating chamber includes a fixed plate fixed on the mold support, on which are fixed an external sleeve and an internal extension rod which are concentrically arranged and provide electric heating together. The internal extension rod is located in the external sleeve. During preheating, the round tube extends into the annular gap between the internal extension rod and the external sleeve.

[0013] Preferably, the upper die portion includes an upper die base vertically slidably mounted on the mold bracket and an upper die embedded and fixed at the bottom end of the upper die base; the lower die portion includes an elastic support and a lower die base jointly vertically slidably mounted on the mold bracket, the lower die base is fixed to the top end of the elastic support, and the top end of the lower die base is embedded and fixed with a lower die; the two self-adaptive block assemblies are respectively assembled on the upper die base and the lower die base; the locking assembly is assembled on the lower die base.

[0014] Preferably, two guide slot holes are arranged horizontally and symmetrically in a direction perpendicular to the axial direction of the expanding core rod on both sides of the lower concave die seat, and the locking components are correspondingly assembled in the two guide slot holes.

[0015] Preferably, two driving rollers are horizontally rotatably installed on the upper die seat and are arranged above the two locking assemblies in a one-to-one correspondence; the mold bracket includes two supporting side plates distributed on both sides of the expansion die, and the two supporting side plates are arranged in a one-to-one correspondence with the two locking assemblies; the locking assembly includes a slider horizontally slidably installed in the guide slot hole, and the slider is provided with a wedge block that cooperates with the driving roller, and a return spring is fixedly connected between the wedge block and the guide slot hole, and a positioning pin is horizontally fixed on the side wall of the wedge block facing away from the guide slot hole, and a positioning hole for the corresponding insertion of the positioning pin is provided on the supporting side plate; when the upper die portion moves downward, the driving roller contacts the wedge surface of the corresponding wedge block below, and causes the slider to slide out of the guide slot hole.

[0016] Preferably, the adaptive block assembly includes a plurality of guide rods, a positioning block is commonly fixed at one end of the plurality of guide rods, an adaptive spring is sleeved on the guide rods, one end of the adaptive spring is fixed to the positioning block; the guide rods corresponding to the upper die seat are radially slidably installed on the upper die seat along the upper die, and the other end of the adaptive spring is fixed to the upper die seat; the guide rods corresponding to the lower die seat are radially slidably installed on the lower die seat along the lower die, and the other end of the adaptive spring is fixed to the lower die seat; the positioning block is provided with an annular bevel.

[0017] Preferably, the elastic support comprises a travel plate vertically slidably mounted on the mold bracket, a plurality of support springs are vertically fixed to the upper end surface of the travel plate, and the lower concave mold seat is horizontally fixed to the top ends of the plurality of support springs.

[0018] Preferably, the pushing mechanism includes a sliding frame which is slidably arranged along the axial direction of the expanding mandrel, and two electric chucks for clamping the inner support of the round tube are fixed on the sliding frame, the center axis of one electric chuck is arranged to coincide with the center axis of the preheating chamber, and the center axis of the other electric chuck is arranged to coincide with the center axis of the expanding mandrel.

[0019] Preferably, a plurality of limiting support plates for positioning the round tubes are evenly distributed and installed on the conveying end of the round tube conveyor.

[0020] Preferably, the outer sleeve and the inner extending rod are both chamfered at the edges of the annular gap.

[0021] The above technical scheme has the following advantages or beneficial effects: the present invention provides a mold for processing socket steel products, which is not only equipped with a flaring core rod and a matching flaring die provided in the existing mold, but also equipped with a round tube conveyor for driving the intermittent conveying of round tubes and a pushing mechanism for driving the round tubes to move horizontally in a direction perpendicular to the conveying direction of the round tube conveyor, and a preheating bin is provided in cooperation with the flaring die in the conveying direction of the round tube conveyor. The round tube can be driven into the preheating bin or the flaring die through the pushing mechanism, and the round tube can be automatically centered during the pushing process. With the cooperation of the round tube conveyor, the continuous operation of feeding and conveying, preheating of round tubes, flaring forming of round tubes and automatic unloading can be realized, and the temporary preheating before forming can greatly improve the forming quality of the round tube.

[0022] In addition, the expanding die is provided with a liftable lower die portion, which can cooperate with the pushing mechanism to smoothly drive the expanded round tube out of the expanding die. Based on the liftable lower die portion, the mold locking design adopted in the expanding die ensures the reset mold positioning accuracy and stability during expansion, and the self-adaptive block assembly installed on the upper die portion and the lower die portion realizes the self-positioning of the port before the round tube is formed.

[0023] To sum up, the mold provided by the present invention, as a mold system, enriches the existing mold equipment structure, and can realize continuous automatic processing operations such as conveying, preheating, expansion molding, and unloading for the plug-in tube, thereby improving the molding quality, ensuring the consistency and standardization of the round tube processing size, meeting the processing efficiency requirements, and greatly reducing manpower consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention and its features, configurations and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts throughout the drawings, which are not drawn to scale, with emphasis on illustrating the subject matter of the present invention.

[0025] Figure 1 It is a three-dimensional structural schematic diagram of a mold for processing a socket steel product provided by the present invention.

[0026] Figure 2 The present invention is a side view of a mold for processing a socket steel product.

[0027] Figure 3 The present invention is a top view of a mold for processing a socket steel product.

[0028] Figure 4 yes Figure 3 Sectional view of AA.

[0029] Figure 5 It is a three-dimensional structural diagram of the upper die portion.

[0030] Figure 6 It is a three-dimensional structural diagram of the lower concave mold part.

[0031] In the figure: 1, round tube conveyor; 11, limit support plate; 2, mold bracket; 21, support side plate; 211, positioning hole; 22, guide column; 3, push mechanism; 31, No. 1 base; 32, sliding frame; 33, electric chuck; 4, preheating chamber; 41, fixed plate; 42, external sleeve; 43, inner extension rod; 5, expansion die; 51, upper die part; 511, upper die seat; 5111, driving roller; 512, upper die; 52, lower die part; 5 21. Elastic support; 5211. Travel plate; 5212. Support spring; 522. Lower die seat; 5221. Guide slot hole; 523. Lower die; 53. Locking assembly; 531. Slider; 532. Wedge block; 533. Return spring; 534. Positioning pin; 54. Adaptive stopper assembly; 541. Guide rod; 542. Positioning stopper; 543. Adaptive spring; 6. Expanding assembly; 61. No. 2 base; 62. Travel seat; 63. Expanding core rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] A mold for processing a spigot steel product, the mold is used to expand the socket end of the spigot pipe; the spigot pipe is a round pipe formed by rolling, hereinafter referred to as a round pipe, and the socket end is also called the expanded end; in the present invention, the mold is specifically a mold system including a mold body. Figure 1 and Figure 2 As shown, the mold includes a round tube conveyor 1 for intermittently conveying round tubes; the round tube conveyor 1 is an existing double-chain conveyor. In order to realize the positioning and conveying of the round tubes, a plurality of limiting pallets 11 are fixed between the two conveying chains, and the plurality of limiting pallets 11 are evenly distributed on the conveying chains. The limiting pallets 11 are groove plate structures, and the limiting pallets 11 are provided with positioning grooves for positioning and placing the round tubes. The round tube conveyor 1 adopts the existing intermittent conveying technology, and each intermittent conveying distance is equal to the distribution spacing of the limiting pallets 11.

[0035] like Figure 1 , Figure 2 and Figure 4 As shown, a mold support 2 is fixed on one side of the round tube conveyor 1. The mold support 2 can be fixed on the processing platform. The mold support 2 includes two supporting side plates 21. Four vertically fixed guide pillars 22 are arranged between the two supporting side plates 21. The four guide pillars 22 are distributed in a rectangular shape.

[0036] like Figure 1 and Figure 4 As shown, the mold support 2 is equipped with a preheating chamber 4 for preheating the end of the round tube to be expanded, and the preheating chamber 4 includes a fixed plate 41 fixed to the mold support 2 by bolts, and an external sleeve 42 and an inner extension rod 43 are welded on the fixed plate 41, which are concentrically arranged and jointly provide electric heating. The interior of the external sleeve 42 and the interior of the inner extension rod 43 are both arranged with existing and temperature-controllable electric heating elements, which can be electric heating wires or other structures; the inner extension rod 43 is located in the external sleeve 42, and the inner diameter of the external sleeve 42 is slightly larger than the outer wall radius of the round tube, and the radius of the inner extension rod 43 is slightly smaller than the inner diameter of the round tube. During preheating, the round tube extends into the annular gap between the inner extension rod 43 and the external sleeve 42. In order to facilitate the round tube to extend into the annular gap, the edges of the annular gap are chamfered on the external sleeve 42 and the inner extension rod 43.

[0037] like Figure 1 and Figure 2 As shown, the mold support 2 is also equipped with a flaring die 5, which is located between the two supporting side plates 21; the preheating chamber 4 and the flaring die 5 are sequentially distributed in the conveying direction of the round tube conveyor 1; one side of the flaring die 5 is provided with a flaring assembly 6 that is used to complete the flaring of the round tube. The flaring assembly 6 includes a No. 2 base 61 fixed on the processing platform, a travel seat 62 horizontally slidably mounted on the No. 2 base 61, and a flaring mandrel 63 horizontally fixed on the travel seat 62. The flaring mandrel 63 is a cylindrical rod extending into the round tube to achieve flaring, and the front end of the flaring mandrel 63 is provided with a truncated cone surface; the central axis of the flaring mandrel 63 is vertically arranged relative to the conveying direction of the round tube conveyor 1 and points to the flaring die 5; a hydraulic cylinder can be installed on the No. 2 base 61 to drive the travel seat 62 to slide.

[0038] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6As shown, the flaring die 5 includes an upper die portion 51 and a lower die portion 52 which are sequentially arranged in the upper and lower parts. The upper die portion 51 includes an upper die seat 511 which is vertically slidably mounted on four guide pillars 22 and an upper die 512 which is fixed to the bottom end of the upper die seat 511 by screw inlay. The lower die portion 52 includes an elastic support 521 and a lower die seat 522. The elastic support 521 includes a travel plate 5211 which is vertically slidably mounted on the four guide pillars 22. The lower die seat 522 is vertically slidably mounted on the four guide pillars 22. The guide pillars 22 are mounted on the lower die seat 522, and the lower die seat 522 is located above the travel plate 5211. The four guide pillars 22 are all sleeved with support springs 5212, and the two ends of the support springs 5212 are respectively welded to the upper end of the travel plate 5211 and the lower end of the lower die seat 522; the top of the lower die seat 522 is fixed with a lower die 523 by screws, and the upper die 512 and the lower die 523 are formed by dividing the complete die into two equal parts. When the upper die 512 and the lower die 523 are in contact with each other, a complete die is formed. In this embodiment, both the upper die portion 51 and the lower die portion 52 can be driven by a hydraulic cylinder to achieve lifting and sliding along the guide column 22. The hydraulic cylinder connected to the upper die portion 51 can be vertically assembled on the top of the mold support 2, and the output end of the hydraulic cylinder is fixed to the top of the upper die seat 511. The hydraulic cylinder is used to achieve the clamping and separation between the upper die portion 51 and the lower die portion 52; the hydraulic cylinder connected to the lower die portion 52 can be vertically fixed on the processing platform, and the output end of the hydraulic cylinder is fixed to the bottom end of the stroke plate 5211 by bolts. Since the conveying end face height of the round tube conveyor 1 remains unchanged, and the expanded section of the round tube will fall into the groove of the lower die 523 after the expansion forming, the hydraulic cylinder connected to the lower die portion 52 drives the lower die portion 52 to descend, thereby avoiding the expanded section of the round tube to facilitate the normal removal of the round tube.

[0039] like Figure 4 , Figure 5 and Figure 6As shown, two guide slot holes 5221 are arranged horizontally and symmetrically in a direction perpendicular to the axial direction of the expansion core rod 63 on both sides of the lower concave mold base 522, and locking components 53 are correspondingly assembled in the two guide slot holes 5221. The two locking components 53 are arranged in a one-to-one correspondence with the two supporting side plates 21. Two driving rollers 5111 correspondingly arranged above the two locking components 53 are horizontally rotatably installed on the upper die seat 511; the locking component 53 includes a slider 531 horizontally slidably installed in the guide slot hole 5221, and a wedge block 532 cooperating with the driving roller 5111 is arranged on the slider 531, and a return spring 533 is welded between the wedge block 532 and the guide slot hole 5221, and a positioning pin 534 is horizontally welded on the side wall of the wedge block 532 facing away from the guide slot hole 5221, and a positioning hole 211 for the corresponding insertion of the positioning pin 534 is arranged on the corresponding supporting side plate 21. In order to facilitate alignment and insertion, the positioning pin 534 and the positioning hole 211 are both chamfered; when the upper die portion 51 moves downward, the driving roller 5111 contacts the inclined surface of the corresponding wedge block 532 below, and causes the slider 531 to slide out from the guide slot hole 5221.

[0040] The lower die seat 522 and the hydraulic cylinder driven to rise and fall with it are connected through an elastic support 521. On the one hand, the hydraulic cylinder can normally drive the elastic support 521 to drive the lower die seat 522 to rise and fall synchronously; on the other hand, when the lower die portion 52 is at the molding processing position height and the upper die portion 51 is lowered to close the mold, the lower die seat 522 supported and installed by the elastic support 521 is reserved with a certain range of freedom of movement in the vertical direction, and the driving roller 5111 descends to drive the wedge block 532 so that the slider 531 moves out of the guide slot hole During the process of sliding outward from the inside of 5221, the positioning pin 534 can be self-aligned and inserted into the positioning hole 211, so as to realize the matching locking between the lower die seat 522 and the two supporting side plates 21. In the locked state, when the mold is closed again, the common center axis between the upper die 512 and the lower die 523 is just in a coincidence with the center axis of the expanding core rod 63, thereby ensuring the accurate positioning of the lower die part 52 after lifting, adjusting and resetting through the self-locking method during mold closing, and also improving the overall stability of the lower die part 52 during the expanding process.

[0041] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, in order to realize automatic positioning of the end of the round tube, both the upper die seat 511 and the lower die seat 522 are equipped with adaptive block assemblies 54 for positioning the expanded end of the round tube on the side end faces facing the expanding core rod 63, and the two adaptive block assemblies 54 are arranged vertically symmetrically; the adaptive block assembly 54 includes two guide rods 541, one end of the two guide rods 541 is welded with a positioning block 542, and the guide rods 541 are sleeved with an adaptive spring 543, one end of the adaptive spring 543 is welded to The positioning block 542 is mounted on the upper die seat 511; the guide rod 541 corresponding to the upper die seat 511 is radially slidably mounted on the upper die seat 511 along the upper die 512, and the other end of the adaptive spring 543 is welded to the upper die seat 511; the guide rod 541 corresponding to the lower die seat 522 is radially slidably mounted on the lower die seat 522 along the lower die 523, and the other end of the adaptive spring 543 is welded to the lower die seat 522; the positioning block 542 is provided with an annular bevel, and the profile features of the positioning block 542 can be seen in detail. Figure 5 and Figure 6 Because the flaring mandrel 63 has a truncated cone surface, before the flaring mandrel 63 extends into the round tube, the truncated cone surface of the flaring mandrel 63 will contact the annular cut slopes of the upper and lower positioning blocks 542, so that in the process of gradually extending into the round tube, the flaring mandrel 63 pushes the upper and lower positioning blocks 542 upward and downward accordingly, and then the flaring mandrel 63 drives the two self-adaptive block assemblies 54 to automatically avoid the round tube opening.

[0042] like Figure 1 and Figure 2 As shown, a pushing mechanism 3 is provided at the other side of the round tube conveyor 1 and relative to the mold support 2, which pushes two round tubes synchronously and moves the two round tubes to the preheating bin 4 and the expanding die 5 respectively; the pushing mechanism 3 includes a sliding frame 32 slidably installed along the axial direction of the expanding core rod 63, a No. 1 base 31 is fixed on the processing platform, the sliding frame 32 is slidably installed on the No. 1 base 31, a hydraulic cylinder can be horizontally installed on the No. 1 base 31 to drive the sliding frame 32 to move, and two electric chucks 33 for clamping the inner support of the round tube are welded on the sliding frame 32, the electric chuck 33 is an existing electric inner support clamping device, the central axis of one electric chuck 33 is arranged to coincide with the central axis of the preheating bin 4, and the central axis of the other electric chuck 33 is arranged to coincide with the central axis of the expanding core rod 63.

[0043] During actual processing, the round tube can be placed on the limiting support plate 11 manually or by a round tube feeder provided in addition. Figure 3 As shown, under the intermittent conveying of the round tube conveyor 1, the round tube feeder drives the round tube to be conveyed from left to right.

[0044] When the round tube is conveyed to the position opposite to the preheating bin 4, the pushing mechanism 3 is started immediately, and the sliding frame 32 drives the electric chuck 33 to move toward the direction close to the preheating bin 4. During the movement, the claws of the electric chuck 33 opposite to the preheating bin 4 extend into the round tube accordingly, and the disk surface of the electric chuck 33 pushes the round tube to approach the preheating bin 4. During the movement, the electric chuck 33 completes the internal support and clamping of the round tube, so that the central axis of the round tube and the central axis of the preheating bin 4 are better in a coincidence state. As the sliding frame 32 moves, the end of the round tube to be expanded extends into the annular gap of the preheating bin 4 and is preheated. Before the round tube conveyor 1 is intermittently started again, the pushing mechanism 3 is started again, and the electric chuck 33 drives the round tube to be pulled out of the preheating bin 4. Subsequently, the electric chuck 33 releases the clamping, and the claws of the electric chuck 33 are immediately moved out of the round tube.

[0045] With the intermittent conveying of the round tube conveyor 1, the round tube after preheating moves to a position opposite to the flaring die 5, and the adjacent round tube is located at a position opposite to the preheating bin 4. At this time, the pushing mechanism 3 is started. On the one hand, the electric chuck 33 opposite to the preheating bin 4 pushes the round tube at its position to extend into the preheating bin 4. On the other hand, the electric chuck 33 opposite to the flaring die 5 pushes the round tube at its position to extend between the upper die 512 and the lower die 523. The electric chuck 33 also has a positioning effect on the round tube through internal support clamping, so that the central axis of the round tube and the central axis of the flaring core rod 63 remain coincident, and until the port of the pushed round tube contacts the two positioning blocks 542, the positioning blocks 542 position the port of the round tube.

[0046] Subsequently, the upper die 512 and the lower die 523 complete the mold contact, and the lower die seat 522 synchronously completes the mold locking, then, the expanding core rod 63 moves closer to the round tube, and synchronously makes the two positioning blocks 542 automatically avoid the position, the expanding core rod 63 extends into the round tube, and cooperates with the expanding die 5 to complete the expanding forming process, then, the expanding core rod 63 is reset, during the processing, the electric chuck 33 opposite to the expanding die 5 plays a role of tightening the end of the round tube to avoid the expanding core rod 63 driving the round tube to move during forming; at this time, the adjacent round tubes complete synchronous preheating; similarly, before the round tube conveyor 1 is started again, first, the lower die portion 52 moves downward to avoid the expanding section of the round tube, and then the pushing mechanism 3 is started again, one electric chuck 33 drives the preheated round tube to move out of the preheating bin 4, and the other electric chuck 33 drives the expanded round tube to move out of the expanding die 5.

[0047] When intermittent conveying is performed again, the round tube that has completed expansion will fall from the round tube conveyor 1, and the automatic unloading will be completed. A material frame can be placed below the drop position for centralized collection; the round tube that has completed preheating will then move to the expansion die 5 position, thereby completing the continuous processing operation.

[0048] The present invention provides a mold for processing spigot steel products, which is not only equipped with a flaring core rod 63 and a matching flaring die 5 provided in the existing mold, but also equipped with a round tube conveyor 1 for driving the intermittent conveying of round tubes and a pushing mechanism 3 for driving the round tubes to move horizontally in a direction perpendicular to the conveying direction of the round tube conveyor 1, and a preheating bin 4 is provided in cooperation with the flaring die 5 in the conveying direction of the round tube conveyor 1. The round tube can be driven to move into the preheating bin 4 or the flaring die 5 by the pushing mechanism 3, and the center of the round tube can be automatically positioned during the pushing process. With the cooperation of the conveying of the round tube conveyor 1, the continuous operation of feeding and conveying, preheating of the round tube, flaring forming of the round tube and automatic unloading can be realized, and the temporary preheating before forming can greatly improve the forming quality of the round tube. In addition, the flaring die 5 can be automatically positioned in the center of the round tube. The mold 5 is provided with a liftable lower die portion 52, which can cooperate with the pushing mechanism 3 to smoothly drive the expanded round tube to be moved out of the expanding die 5. On the basis that the lower die portion 52 can be lifted and lowered, the mold locking design adopted in the expanding die 5 ensures the reset mold positioning accuracy and stability during expansion. In addition, the self-adaptive block assembly 54 installed on the upper die portion 51 and the lower die portion 52 realizes the self-positioning of the port before the round tube is formed. In summary, the mold provided by the present invention, as a mold system, enriches the existing mold equipment structure, and can realize continuous automatic processing operations such as conveying, preheating, expanding molding, and unloading for the plug tube, thereby improving the molding quality, ensuring the consistency and standardization of the processing size of the round tube, meeting the processing efficiency requirements, and greatly reducing manpower consumption.

[0049] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0051] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A mold for processing a socket steel product, characterized in that: The invention comprises a round tube conveyor (1) for intermittently conveying round tubes; a mold support (2) is fixed on one side of the round tube conveyor (1); a preheating bin (4) for preheating the end of the round tube to be expanded is mounted on the mold support (2); an expanding die (5) is also mounted on the mold support (2); the preheating bin (4) and the expanding die (5) are sequentially distributed in the conveying direction of the round tube conveyor (1); a pushing mechanism (3) is arranged on the other side of the round tube conveyor (1) for synchronously pushing two round tubes and causing the two round tubes to move toward the preheating bin (4) and the expanding die (5) respectively; an expanding assembly (6) is arranged on one side of the expanding die (5) in cooperation with the expanding die (5) for jointly expanding the round tube; wherein: The flaring assembly (6) comprises a flaring core rod (63) which is arranged to move along the central axis direction of the flaring die (5); the flaring die (5) comprises an upper die portion (51) and a lower die portion (52) which are arranged in sequence up and down, the upper die portion (51) and the lower die portion (52) are both vertically driven to slide and be mounted on the mold support (2), the lower die portion (52) is equipped with a locking assembly (53) which cooperates with the mold support (2) to lock, when the upper die portion (51) and the lower die portion (52) are in upper and lower mold contact and the locking assembly (53) is cooperated with the mold support (2) to lock, the central axis of the flaring die (5) and the central axis of the flaring core rod (63) are in a coincident state; Both the upper die portion (51) and the lower die portion (52) are equipped with self-adaptive stopper assemblies (54) for positioning the expanded end of the round tube on the side end surfaces facing the expanding core rod (63), and the two self-adaptive stopper assemblies (54) are arranged vertically symmetrically. Before the expanding core rod (63) extends into the round tube, the expanding core rod (63) drives the two self-adaptive stopper assemblies (54) to automatically avoid the tube mouth.

2. The mold for processing a socket steel product according to claim 1, characterized in that: The preheating chamber (4) comprises a fixed plate (41) fixed on the mold support (2), and an external sleeve (42) and an inner extension rod (43) are fixed on the fixed plate (41) and are arranged concentrically and jointly provide electric heating. The inner extension rod (43) is located in the external sleeve (42). During preheating, the round tube extends into the annular gap between the inner extension rod (43) and the external sleeve (42).

3. The mold for processing a socket steel product according to claim 1, characterized in that: The upper die portion (51) comprises an upper die seat (511) vertically slidably mounted on the die support (2) and an upper die (512) embedded and fixed at the bottom end of the upper die seat (511); the lower die portion (52) comprises an elastic support (521) and a lower die seat (522) vertically slidably mounted on the die support (2), the lower die seat (522) being fixed at the top end of the elastic support (521), and a lower die (523) being embedded and fixed at the top end of the lower die seat (522); the two self-adaptive stopper assemblies (54) are respectively mounted on the upper die seat (511) and the lower die seat (522); and the locking assembly (53) is mounted on the lower die seat (522).

4. The mold for processing a socket steel product according to claim 3, characterized in that: Two guide slot holes (5221) are arranged horizontally and symmetrically in a direction perpendicular to the axial direction of the expansion core rod (63) on both sides of the lower concave die seat (522), and the locking components (53) are respectively mounted in the two guide slot holes (5221).

5. The mold for processing a socket steel product according to claim 4, characterized in that: The upper die seat (511) is horizontally rotatably mounted with two driving rollers (5111) arranged one-to-one in a matching manner above the two locking assemblies (53); the mold support (2) comprises two supporting side plates (21) distributed on both sides of the flaring die (5), and the two supporting side plates (21) are arranged one-to-one in a matching manner with the two locking assemblies (53); the locking assemblies (53) comprise a sliding block (531) horizontally slidably mounted in the guide slot hole (5221), and the sliding block (531) is provided with a wedge block (5321) matching with the driving roller (5111). ), a return spring (533) is fixedly connected between the wedge block (532) and the guide slot hole (5221), a positioning pin (534) is horizontally fixed on the side wall of the wedge block (532) facing away from the guide slot hole (5221), and a positioning hole (211) for corresponding insertion of the positioning pin (534) is provided on the supporting side plate (21); when the upper die portion (51) moves downward, the driving roller (5111) contacts the wedge surface of the corresponding wedge block (532) below, and causes the slider (531) to slide out from the guide slot hole (5221).

6. The mold for processing a socket steel product according to claim 3, characterized in that: The self-adaptive stopper assembly (54) comprises a plurality of guide rods (541), one end of each of which is commonly fixed with a positioning stopper (542), an adaptive spring (543) is sleeved on the guide rods (541), one end of which is fixed on the positioning stopper (542); the guide rods (541) corresponding to the upper die seat (511) are radially slidably mounted on the upper die seat (511) along the upper die (512), and the other end of the adaptive spring (543) is fixed on the upper die seat (511); the guide rods (541) corresponding to the lower die seat (522) are radially slidably mounted on the lower die seat (522) along the lower die (523), and the other end of the adaptive spring (543) is fixed on the lower die seat (522); and a circular cutting bevel is provided on the positioning stopper (542).

7. The mold for processing a socket steel product according to claim 3, characterized in that: The elastic support (521) comprises a travel plate (5211) vertically slidably mounted on the mold support (2), a plurality of support springs (5212) being vertically fixed to the upper end surface of the travel plate (5211), and the lower concave mold base (522) being horizontally fixed to the top ends of the plurality of support springs (5212).

8. The mold for processing a socket steel product according to claim 1, characterized in that: The pushing mechanism (3) comprises a sliding frame (32) slidably arranged along the axial direction of the expanding core rod (63), and two electric chucks (33) for clamping the inner support of the round tube are fixed on the sliding frame (32), the central axis of one of the electric chucks (33) being arranged to coincide with the central axis of the preheating chamber (4), and the central axis of the other electric chuck (33) being arranged to coincide with the central axis of the expanding core rod (63).

9. The mold for processing a socket steel product according to claim 1, characterized in that: A plurality of position limiting support plates (11) for positioning the round tubes are evenly distributed and installed on the conveying end of the round tube conveyor (1).

10. The mold for processing a socket steel product according to claim 2, characterized in that: The outer sleeve (42) and the inner extension rod (43) are both chamfered at the edges of the annular gap.

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