Side-pressure roller forming die system

Abstract

This invention relates to a side-pressure roller forming die system, comprising a frame, an upper die mechanism, an ejection mechanism, a cover plate mechanism, multiple side-pressure mechanisms, multiple sector-shaped blocks, and an opening and closing mechanism. A horizontal frame plate is disposed in the middle of the frame, and a lower core mold is disposed in the middle of the upper surface of the frame plate. The number of sector-shaped blocks and side-pressure mechanisms is equal, and the multiple side-pressure mechanisms and sector-shaped blocks are evenly distributed outside the central axis of the lower core mold, with the side-pressure mechanisms and sector-shaped blocks arranged alternately. The opening and closing mechanism is disposed at the bottom of the frame plate and connected to all sector-shaped blocks. The upper die mechanism and cover plate mechanism are both located at the top of the frame, and the ejection mechanism is located at the bottom of the frame. The die system of this invention completes the manufacturing of the preform through lateral balanced pressing, resulting in small differences in the pressing density of the roller preform and high manufacturing efficiency.

Description

Technical Field

[0001] This invention relates to the field of roller manufacturing technology, specifically a side-pressure roller forming mold system. Background Technology

[0002] Rice milling rollers (rollers) are key equipment in grain processing. Their blanks are cylindrical in shape, with an embedded iron core for rolling inside. After machining spiral grooves on the outer surface of the cylindrical shape and finishing, the finished product is formed. Typically, the roller blank uses SiC as the abrasive material and resin and ceramic materials as binders. The prepared raw materials are loaded into a cylindrical mold with a core, and then placed under a four-column press of a certain tonnage for axial pressure molding.

[0003] The above molding method has the following problems:

[0004] 1. During the forming process of the roll blank, due to the axial pressure applied, the axial pressure loss is large, and the pressing density difference between the roll end and the middle is large;

[0005] 2. To ensure the most basic pressing density, longer rollers require greater pressure, which places higher demands on the press and increases energy consumption.

[0006] 3. Due to the relative displacement of the hard abrasive grains during pressing, there is a lot of friction with the inner wall of the mold cylinder and the outer wall of the mold core, making the mold cylinder and mold core very easy to wear out and become unusable;

[0007] 4. Demolding after roller forming is difficult and requires a special station and equipment, making operation difficult. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a side-pressure roller forming die system to address the above-mentioned shortcomings. The die system of the present invention completes the manufacturing of the blank through lateral balanced pressing, resulting in small pressing density differences of the roller blank and high manufacturing efficiency.

[0009] To solve the above technical problems, the present invention adopts the following technical solution:

[0010] A side-pressure type roller forming die system includes a frame, an upper die mechanism, an ejection mechanism, a cover plate mechanism, multiple side-pressure mechanisms, multiple sector blocks, and an opening and closing mechanism. A horizontal frame plate is provided in the middle of the frame, and a lower core mold is provided in the middle of the upper surface of the frame plate. The number of sector blocks and side-pressure mechanisms is the same, and multiple side-pressure mechanisms and sector blocks are evenly distributed outside the central axis of the lower core mold, and the side-pressure mechanisms and sector blocks are staggered. The opening and closing mechanism is located at the bottom of the frame plate and is connected to all sector blocks. The upper die mechanism and the cover plate mechanism are both located at the top of the frame, and the ejection mechanism is located at the bottom of the frame.

[0011] The upper mold mechanism is used to place the rolling core on top of the lower mold and then drive the upper mold to descend until the upper mold and the lower mold clamp the rolling core. The opening and closing mechanism is used to simultaneously drive all the fan-shaped blocks to approach the lower mold in the horizontal direction to form a filling cavity with an open upper surface. The outer wall of the filling cavity is a closed cylindrical surface composed of multiple arc-shaped pressure blocks and multiple fan-shaped blocks. The inner wall of the filling cavity is composed of the outer walls of the upper mold and the lower mold.

[0012] The cover plate mechanism is used to drive the end cover plate down to close the upper surface of the material cavity after the blank is filled in the filling cavity. The side pressing mechanism pushes the arc-shaped pressing block to move along the central axis of the lower core mold in the horizontal direction, so that the complete cylindrical surface composed of multiple arc-shaped pressing blocks can press the blank into a hollow cylindrical roll blank.

[0013] The side pressing mechanism is used to push the arc-shaped pressing block away from the center axis of the lower core mold in the horizontal direction after the blank is pressed and formed. The upper mold mechanism drives the upper core mold to rise to a preset height, the cover plate mechanism drives the end cover plate to rise to a preset height, the opening and closing mechanism drives all the fan-shaped blocks away from the center axis of the lower core mold in the horizontal direction, and the ejection mechanism pushes the roller blank upward to complete the demolding.

[0014] Furthermore, the opening and closing mechanism includes a mold opening plate, gears and a motor. The frame plate has the same number of angular straight slots as the number of fan-shaped blocks. The trajectory lines of the angular straight slots are perpendicular to the central axis of the lower core mold. The angular straight slots correspond one-to-one with the fan-shaped blocks.

[0015] The mold opening plate and gear are both horizontally arranged at the bottom of the frame plate. The mold opening plate is coaxial with the lower core mold. The mold opening plate and gear mesh with each other. The output end of the motor is connected to the gear. The mold opening plate has an involute groove with the same number as the fan-shaped blocks. The involute grooves correspond one-to-one with the fan-shaped blocks. The bottom of the fan-shaped blocks is provided with guide blocks. The bottom of the guide blocks is vertically provided with first pins. The guide blocks are located in the angular straight groove and can move along the angular straight groove. The first pin is located in the involute groove and can move along the involute groove.

[0016] The motor is used to drive the gear to rotate, thereby rotating the mold opening plate, so as to drive the fan-shaped block to translate towards the central axis of the lower core mold or away from the central axis of the lower core mold through the first pin, the angular straight groove and the involute groove.

[0017] Furthermore, the cover plate mechanism includes an end cover plate and a first pressure cylinder. The first pressure cylinder is vertically disposed on the top of the frame, and the end cover plate is horizontally disposed at the bottom of the piston rod of the first pressure cylinder and directly above the lower core mold. The first pressure cylinder is used to drive the end cover plate to rise or fall, so as to open or close the upper surface of the packing cavity.

[0018] Furthermore, a conical pin is vertically provided at the top of the fan-shaped assembly, and the end cover plate has conical holes of the same number and position as the fan-shaped assembly, with the inner diameter of the conical holes gradually increasing from top to bottom. When all the fan-shaped assemblies approach the lower core mold in the horizontal direction, the through holes and conical pins cooperate with each other and correspond one-to-one.

[0019] Furthermore, the side pressing mechanism includes a push cylinder, a bracket, and an arc-shaped pressure block. The bracket is disposed on the upper surface of the frame plate and located between two adjacent fan-shaped blocks. The push cylinder is disposed on the side of the bracket away from the lower core mold. The arc-shaped pressure block is disposed on the side of the bracket close to the lower core mold and is connected to the piston rod of the push cylinder.

[0020] After the blank is filled into the filling cavity, the push cylinder is used to push the arc-shaped pressure block to move in the gap between two adjacent fan-shaped blocks towards the central axis of the lower core mold; after the blank is pressed and formed, the push cylinder is used to push the arc-shaped pressure block to move in the gap between two adjacent fan-shaped blocks away from the central axis of the lower core mold.

[0021] Furthermore, the upper mold mechanism includes a second pressure cylinder and an upper core mold. The second pressure cylinder is disposed on the top of the frame, and the upper core mold is vertically disposed at the bottom of the piston rod of the second pressure cylinder. The central axis of the upper core mold coincides with the central axis of the lower core mold.

[0022] The second pressure cylinder is used to push the upper core mold down after the iron core for the rolling roller is placed on the top of the lower core mold until the lower surface of the upper core mold abuts against the upper surface of the lower core mold; after the blank is pressed into shape, the second pressure cylinder pushes the upper core mold up to a preset height.

[0023] Furthermore, the ejection mechanism includes an ejection cylinder, a lower push plate, an upper push plate, and a push rod. The bottom of the frame is provided with a support plate below the frame plate. The ejection cylinder is located at the bottom of the support plate. The lower push plate is located at the top of the support plate and is connected to the push rod of the ejection cylinder. An annular groove is formed on the upper surface of the frame plate outside the lower core mold. The upper push plate is located in the annular groove. The bottom end of the push rod is fixed to the lower push plate, and the top end of the push rod passes through the frame plate and is fixed to the upper push plate.

[0024] The ejection cylinder is used to push the lower push plate upward after the blank is pressed and formed. The lower push plate is used to drive the upper push plate upward through the push rod to push the roll blank upward.

[0025] Furthermore, the number of the fan-shaped blocks and the side-pressing mechanism are both four, and the cross-section of the fan-shaped blocks is fan-shaped with a central angle of 90°. Roller core.

[0026] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0027] 1. In the pressing and forming of the roll blank, the present invention uses four concentric arc-shaped pressure blocks to apply pressure simultaneously. By pushing the cylinder to apply the same thrust to the arc-shaped pressure blocks, the pressing density on the surface of the roll blank is uniform and consistent, the roll wall thickness is small, the pressing loss in the pressing direction is small, the difference in pressing density between the inside and outside of the blank is small, and the yield and quality of the roll are high.

[0028] 2. Before pressing, the opening and closing components will move the fan-shaped blocks forward to form a closed area with the arc-shaped pressing blocks in the horizontal plane, and a rectangular gap will be left between adjacent fan-shaped blocks, so that the arc-shaped pressing blocks can be moved within the rectangular gap for pressing or mold opening.

[0029] 3. This invention uses multiple arc-shaped pressure blocks to press and shape the blank. Due to the lateral segmented pressure, the required pressure is less than the axial pressure, resulting in low energy consumption of the press.

[0030] 4. During the pressing process, the SiC abrasive material is pushed forward in parallel under the pressure of the arc-shaped pressure block. There is no relative movement between the SiC abrasive material and the mold wall of the arc-shaped pressure block. The friction between the SiC abrasive material and the mold wall is minimal, resulting in less wear on the mold and a longer mold service life.

[0031] 5. The entire process, from loading to pressing to demolding, is completed in one station. The pressing, molding, and demolding are all automated, resulting in high manufacturing efficiency, low manual labor requirements, and easy operation.

[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0033] Figure 1 This is a front view of the invention in the pressed state;

[0034] Figure 2 This is a perspective view of the invention in a pressed state;

[0035] Figure 3 This is a front view of the invention from another angle when it is in a pressed state;

[0036] Figure 4 for Figure 3 Enlarged view of point A;

[0037] Figure 5 This is a front cross-sectional view of the present invention in the pressed state;

[0038] Figure 6 for Figure 5 Enlarged view of point B;

[0039] Figure 7 This is a perspective view of the present invention in the demolded state;

[0040] Figure 8 This is a perspective view of the invention in its demolded state from another angle;

[0041] Figure 9 for Figure 8 Enlarged view of point C;

[0042] Figure 10 This is a front cross-sectional view of the present invention in the demolded state;

[0043] Figure 11 This is a three-dimensional structural diagram of the frame plate of the present invention;

[0044] Figure 12 This is a three-dimensional structural diagram of the fan-shaped assembly block of the present invention.

[0045] The attached diagram lists the components represented by each number as follows:

[0046] 1. Frame; 11. Frame plate; 111. Angular straight groove; 12. Lower core mold; 21. Second pressure cylinder; 22. Upper core mold; 31. Ejection cylinder; 32. Lower push plate; 33. Upper push plate; 34. Push rod; 35. Support plate; 41. End cover plate; 411. Tapered hole; 42. First pressure cylinder; 51. Push cylinder; 52. Bracket; 53. Arc-shaped pressure block; 6. Fan-shaped block; 61. Guide block; 62. First pin; 63. Tapered pin; 71. Mold opening plate; 711. Involute groove; 72. Gear; 73. Motor; 81. Roll blank; 82. Roll core. Detailed Implementation

[0047] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0048] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0049] like Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8As shown, a side-pressure roller forming die system is characterized by comprising a frame 1, an upper die mechanism, an ejection mechanism, a cover plate mechanism, multiple side-pressure mechanisms, multiple fan-shaped blocks 6, and an opening and closing mechanism. A horizontal frame plate 11 is provided in the middle of the frame 1, and a lower core mold 12 is provided in the middle of the upper surface of the frame plate 11. The number of fan-shaped blocks 6 and side-pressure mechanisms is the same. Multiple side-pressure mechanisms and fan-shaped blocks 6 are evenly distributed outside the central axis of the lower core mold 12, and the side-pressure mechanisms and fan-shaped blocks 6 are staggered. The opening and closing mechanism is provided at the bottom of the frame plate 11 and connected to all fan-shaped blocks 6. The upper die mechanism and the cover plate mechanism are both provided at the top of the frame 1, and the ejection mechanism is provided at the bottom of the frame 1.

[0050] The upper mold mechanism is used to place the rolling core on the top of the lower core mold 12 and drive the upper core mold 22 to descend until the upper core mold 22 and the lower core mold 12 clamp the rolling core 82. The opening and closing mechanism is used to simultaneously drive all the fan-shaped blocks 6 to approach the lower core mold 12 in the horizontal direction to form a filling cavity with an open upper surface. The outer wall of the filling cavity is a closed cylindrical surface composed of multiple arc-shaped pressure blocks 53 and multiple fan-shaped blocks 6. The inner wall of the filling cavity is composed of the outer walls of the upper core mold 22 and the lower core mold 12.

[0051] The cover plate mechanism is used to drive the end cover plate 41 down to close the upper surface of the material cavity after the blank is filled in the filling cavity. The side pressing mechanism pushes the arc-shaped pressing block 53 to move along the central axis of the lower core mold 12 in the horizontal direction, so that the complete cylindrical surface composed of multiple arc-shaped pressing blocks 53 can press the blank into a hollow cylindrical roll blank.

[0052] The side pressing mechanism is used to push the arc-shaped pressing block 53 away from the central axis of the lower core mold 12 in the horizontal direction after the blank is pressed and formed. The upper mold mechanism drives the upper core mold 22 to rise to a preset height. The cover plate mechanism drives the end cover plate 41 to rise to a preset height. The opening and closing mechanism drives all the fan-shaped blocks 6 away from the central axis of the lower core mold 12 in the horizontal direction. The ejection mechanism pushes the roller blank upward to complete the demolding.

[0053] like Figure 4 , Figure 9 , Figure 11 and Figure 12 As shown, in one embodiment, the opening and closing mechanism includes a mold opening plate 71, a gear 72 and a motor 73. The frame plate 11 has the same number of angular straight slots 111 as the number of fan-shaped blocks 6. The trajectory lines of the angular straight slots 111 are perpendicular to the central axis of the lower core mold 12. The angular straight slots 111 correspond one-to-one with the fan-shaped blocks 6.

[0054] The mold opening plate 71 and gear 72 are both horizontally arranged at the bottom of the frame plate 11. The mold opening plate 71 is coaxial with the lower core mold 12. The mold opening plate 71 and gear 72 mesh with each other. The output end of the motor 73 is connected to the gear 72. The mold opening plate 71 has an involute groove 711 with the same number as the fan-shaped blocks 6. The involute groove 711 corresponds one-to-one with the fan-shaped blocks 6. The bottom of the fan-shaped blocks 6 is provided with a guide block 61. The bottom of the guide block 61 is vertically provided with a first pin 62. The guide block 61 is located in the angular straight groove 111 and can move along the angular straight groove 111. The first pin 62 is located in the involute groove 711 and can move along the involute groove 711.

[0055] The motor 73 is used to drive the gear 72 to rotate, thereby rotating the mold opening plate 71. The fan-shaped block 6 is moved towards the central axis of the lower core mold 12 or away from the central axis of the lower core mold 12 via the first pin 62, the angular straight groove 111 and the involute groove 711.

[0056] Specifically, when the guide block 61 abuts against the side of the angular straight slot 111 near the lower core mold 12, it represents the limit distance that the fan-shaped block 6 can move to the central axis of the lower core mold 12 (i.e., the mold closing position of the fan-shaped block 6). When the fan-shaped block 6 moves to the limit distance of the movement to the central axis of the lower core mold 12, the tapered pin 63 at the top of the fan-shaped block 6 is aligned with the corresponding tapered hole 411 (i.e., the tapered pin 63 is located directly below the corresponding tapered hole 411). When the guide block 61 abuts against the side of the angular straight slot 111 away from the lower core mold 12, it represents the limit distance that the fan-shaped block 6 can move away from the central axis of the lower core mold 12 (i.e., the mold opening position of the fan-shaped block 6). The cooperation between the angular straight slot 111 and the guide block 61 serves both as a guide and as a limitation on the limit movement position of the fan-shaped block 6.

[0057] like Figure 2 and Figure 3 As shown, in one embodiment, the cover plate mechanism includes an end cover plate 41 and a first pressure cylinder 42. The first pressure cylinder 42 is vertically disposed on the top of the frame 1, and the end cover plate 41 is horizontally disposed at the bottom of the piston rod of the first pressure cylinder 42 and located directly above the lower core mold 12. The first pressure cylinder 42 is used to drive the end cover plate 41 to rise or fall, so as to open the upper surface of the packing cavity or close the upper surface of the packing cavity.

[0058] like Figure 7 , Figure 8 and Figure 12As shown, in one embodiment, a tapered pin 63 is vertically provided on the top of the fan-shaped block 6, and a tapered hole 411 is provided on the end cover plate 41 in the same number and corresponding position as the fan-shaped block 6. The inner diameter of the tapered hole 411 gradually increases from top to bottom. When all the fan-shaped blocks 6 approach the lower core mold 12 in the horizontal direction, the through hole 411 and the tapered pin 63 cooperate with each other and correspond one-to-one.

[0059] like Figure 5 , Figure 6 and Figure 10 As shown, in one embodiment, the side pressing mechanism includes a push cylinder 51, a bracket 52, and an arc-shaped pressing block 53. The bracket 52 is disposed on the upper surface of the frame plate 11 and located between two adjacent fan-shaped blocks 6. The push cylinder 51 is disposed on the side of the bracket 52 away from the lower core mold 12. The arc-shaped pressing block 53 is disposed on the side of the bracket 52 close to the lower core mold 12 and is connected to the piston rod of the push cylinder 51.

[0060] After the blank is filled into the filling cavity, the push cylinder 51 is used to push the arc-shaped pressure block 53 to move in the gap between two adjacent fan-shaped blocks 6 towards the central axis of the lower core mold 12; after the blank is pressed and formed, the push cylinder 51 is used to push the arc-shaped pressure block 53 to move in the gap between two adjacent fan-shaped blocks 6 away from the central axis of the lower core mold 12.

[0061] Specifically, all push cylinders 52 are connected to hydraulic balance valves to ensure that the pressure output by the push cylinders 52 is constant, thus maintaining a uniform and consistent pressing density on the surface of the roll blank.

[0062] In one embodiment, the upper mold mechanism includes a second pressure cylinder 21 and an upper core mold 22. The second pressure cylinder 21 is disposed on the top of the frame 1, and the upper core mold 22 is vertically disposed at the bottom of the piston rod of the second pressure cylinder 21. The central axis of the upper core mold 22 coincides with the central axis of the lower core mold 12.

[0063] The second pressure cylinder 21 is used to push the upper core mold 22 down after the iron core for the rolling mill is placed on the top of the lower core mold 12, until the lower surface of the upper core mold 22 abuts against the upper surface of the lower core mold 12; after the blank is pressed and formed, the second pressure cylinder 21 pushes the upper core mold 22 up to a preset height.

[0064] In this embodiment, the base portion of the lower core mold 12 passes through the frame plate 11 and is located at the bottom of the frame plate 11. The mold opening plate 71 is disposed on the outside of the lower core mold 12 and is located directly between the frame plate 11 and the base portion of the lower core mold 12. The mold opening plate 71 is coaxial with the lower core mold 12. The top end of the push rod 34 passes through the lower core mold 12 and the frame plate 11 in sequence and is fixed to the bottom of the upper push plate 33.

[0065] The ejection cylinder 31 is used to push the lower push plate 32 upward after the blank is pressed and formed. The lower push plate 32 is used to drive the upper push plate 33 upward through the push rod 34 to push the roll blank upward.

[0066] In one embodiment, the ejection mechanism includes an ejection cylinder 31, a lower push plate 32, an upper push plate 33, and a push rod 34. The bottom of the frame 1 is provided with a support plate 35 located below the frame plate 11. The ejection cylinder 31 is located at the bottom of the support plate 35. The lower push plate 32 is located at the top of the support plate and is connected to the push rod 34 of the ejection cylinder 31. An annular groove is formed on the upper surface of the frame plate 11 outside the lower core mold 12. The upper push plate 33 is located in the annular groove. The bottom end of the push rod 34 is fixed to the lower push plate 32, and the top end of the push rod 34 passes through the frame plate 11 and is fixed to the upper push plate 33.

[0067] In one embodiment, there are four fan-shaped blocks 6 and four side-pressing mechanisms. The cross-section of the fan-shaped blocks 6 is fan-shaped and the central angle is 90°.

[0068] The workflow of this invention:

[0069] After the previous blank is pressed and ejected from the mold, as Figure 7 , Figure 8 and Figure 10 As shown.

[0070] Mold closing process: The ejector cylinder 31 pushes the lower ejector plate 32 down, and the lower ejector plate 32 drives the upper ejector plate 33 down through the ejector rod 34 until the upper ejector plate 33 is completely placed in the annular groove;

[0071] The rolling core 82 is placed on top of the lower core mold 12. The second pressure cylinder 21 pushes the upper core mold 22 down until the lower surface of the upper core mold 22 abuts against the upper surface of the lower core mold 12, and the rolling core is sleeved on the top of the lower core mold 12 and the bottom of the upper core mold 22, and the rolling core 82 is clamped by the upper core mold 22 and the lower core mold 12.

[0072] The motor 73 drives the gear 72 to rotate, thereby causing the mold opening plate 71 to rotate by a preset angle. During the rotation, the mold opening plate 71 pushes the first pin 62 to move towards the side closer to the lower core mold 12 through the involute groove 711, thereby causing the guide block 61 to move towards the side closer to the lower core mold 12 in the angled straight groove 111, thereby causing all the fan-shaped blocks 6 to translate a preset distance towards the central axis of the lower core mold 12, thereby forming a material cavity with an open upper surface (i.e., the area between the frame plate 111, the lower core mold 12, the upper core mold 22, the fan-shaped blocks 6 and the arc-shaped pressure block 53).

[0073] Filling process: Weigh the prepared and mixed raw material and fill a certain amount of raw material into the material cavity. After filling, the first pressure cylinder 42 pushes the end cover plate 41 down until the lower surface of the end cover plate 41 abuts against the upper surface of the fan-shaped block 6, and all the through holes on the end cover plate 41 are fitted onto the corresponding conical pins 62.

[0074] Pressing process: The fan-shaped blocks are used to close the gap between the arc-shaped blocks. All the push cylinders 51 push the arc-shaped pressing blocks 53 to move towards the central axis of the lower core mold 12. During this process, the fan-shaped pressing blocks do not move, and the arc-shaped pressing blocks move forward. Multiple arc-shaped pressing blocks form a complete cylindrical surface to press the blank into a hollow cylindrical roll blank 81.

[0075] Demolding process: All push cylinders 51 push the arc-shaped pressure block 53 to move away from the central axis of the lower core mold 12 to the initial position, and the second pressure cylinder 21 drives the upper core mold 22 to rise to a preset height;

[0076] The first pressure cylinder 42 drives the end cover plate 41 to rise to a preset height;

[0077] The motor 73 drives the gear 72 to rotate, thereby causing the mold opening plate 71 to rotate in the opposite direction by a preset angle. During the rotation, the mold opening plate 71 will push the first pin 62 to move away from the lower core mold 12 through the involute groove 711, thereby causing the guide block 61 to move away from the lower core mold 12 in the angular straight groove 111, thereby causing all the fan-shaped blocks 6 to translate a preset distance away from the central axis of the lower core mold 12.

[0078] The ejector cylinder 31 pushes the lower push plate 32 to rise to a preset height. The lower push plate 32 drives the upper push plate 33 to rise through the push rod 34, so as to push the roll blank 81 (including the roll core 82) out from the outside of the lower core mold 12 to complete the demolding. Then the roll blank 81 can be taken out.

[0079] The above description provides examples of the preferred embodiments of the present invention. Parts not detailed herein are common knowledge to those skilled in the art. The scope of protection of the present invention is determined by the claims. Any equivalent modifications based on the technical teachings of the present invention are also within the scope of protection of the present invention.

Claims

1. A side-pressing roll forming die system, characterized by, The utility model relates to a hollow roller blanking machine, including frame (1), upper die mechanism, push -out mechanism, apron mechanism, a plurality of side pressure mechanism, a plurality of sector blocks (6) and open -and -shut mechanism, the middle part of frame (1) is provided with horizontal frame plate (11), the upper surface middle part of frame plate (11) is provided with lower core mould (12), sector block (6) and side pressure mechanism number are same, a plurality of side pressure mechanism and sector block (6) evenly distribute and set up in the outside of the central axis of lower core mould (12), and side pressure mechanism and sector block (6) are staggered and set up, open -and -shut mechanism is set up in the bottom of frame plate (11) and is connected with all sector blocks (6), and upper die mechanism and apron mechanism are all set up in the top of frame (1), and push -out mechanism is set up in the bottom of frame (1), Upper die mechanism is used to place the iron core of roller after the top of lower core mould (12) and drive upper core mould (22) to descend until the lower surface of upper core mould (22) is against the upper surface of lower core mould (12), open -and -shut mechanism is used to drive all sector blocks (6) to be close to lower core mould (12) along the horizontal direction simultaneously to form the filling cavity of open upper surface, the outer side wall of filling cavity is composed of a plurality of arc-shaped pressing blocks (53) and a plurality of sector blocks (6), and the inner side wall of filling cavity is composed of the outer wall of upper core mould (22) and lower core mould (12), Apron mechanism is used to drive end head apron (41) to descend to close the upper surface of filling cavity after filling the blank in filling cavity, and side pressure mechanism pushes arc-shaped pressing block (53) to move along the horizontal direction to the central axis of lower core mould (12), so that the complete cylindrical surface composed of a plurality of arc-shaped pressing blocks (53) is to press the blank into hollow cylindrical roller blank, The apron mechanism includes end head apron (41) and first pressing cylinder (42), the first pressing cylinder (42) is vertically arranged on the top of frame (1), the end head apron (41) is horizontally arranged on the bottom of piston rod of first pressing cylinder (42) and is located directly above lower core mould (12), and the first pressing cylinder (42) is used to drive end head apron (41) to ascend or descend to open the upper surface of filling cavity or close the upper surface of filling cavity, Side pressure mechanism is used to push arc-shaped pressing block (53) away from the central axis of lower core mould (12) along the horizontal direction after the blank is pressed into shape, upper die mechanism drives upper core mould (22) to ascend to the preset height, apron mechanism drives end head apron (41) to ascend to the preset height, open -and -shut mechanism drives all sector blocks (6) to be away from the central axis of lower core mould (12) along the horizontal direction, and push -out mechanism pushes roller blank upward to complete demolding, The top of sector block (6) is vertically provided with a tapered column pin (63), the end head apron (41) is provided with a tapered hole (411) corresponding in position and same in number with sector block (6), and the inner diameter of tapered hole (411) gradually increases from top to bottom, when all sector blocks (6) are close to lower core mould (12) along the horizontal direction, the tapered hole (411) and tapered column pin (63) are matched and one -to -one corresponding.

2. The side press roll forming die system of claim 1, wherein, The opening and closing mechanism comprises an opening mold rotating plate (71), a gear (72) and a motor (73), the frame plate (11) is provided with a same number of angular straight slots (111) as the fan-shaped blocks (6), the track line of the angular straight slots (111) is perpendicular to the central axis of the lower core mold (12), and the angular straight slots (111) correspond to the fan-shaped blocks (6) one by one; The opening mold rotating plate (71) and the gear (72) are both horizontally arranged at the bottom of the frame plate (11), the opening mold rotating plate (71) is coaxial with the lower core mold (12), the opening mold rotating plate (71) is engaged with the gear (72), the output end of the motor (73) is connected with the gear (72), the opening mold rotating plate (71) is provided with a same number of involute slots (711) as the fan-shaped blocks (6), the involute slots (711) correspond to the fan-shaped blocks (6) one by one, the bottom of the fan-shaped block (6) is provided with a guide block (61), the bottom of the guide block (61) is vertically provided with a first column pin (62), the guide block (61) is arranged in the angular straight slot (111) and can move along the angular straight slot (111), and the first column pin (62) is arranged in the involute slot (711) and can move along the involute slot (711). The motor (73) is used for driving the gear (72) to rotate to drive the opening mold rotating plate (71) to rotate, so as to drive the fan-shaped block (6) to translate towards the central axis of the lower core mold (12) or away from the central axis of the lower core mold (12) through the first column pin (62), the angular straight slot (111) and the involute slot (711).

3. The side press roll forming die system of claim 1, wherein, The side pressing mechanism comprises a pushing cylinder (51), a support (52) and an arc-shaped pressing block (53), the support (52) is arranged on the upper surface of the frame plate (11) and located between two adjacent fan-shaped blocks (6), the pushing cylinder (51) is arranged on the side of the support (52) away from the lower core mold (12), and the arc-shaped pressing block (53) is arranged on the side of the support (52) close to the lower core mold (12) and connected with the piston rod of the pushing cylinder (51); When the filler cavity is filled with the embryo material, the pushing cylinder (51) is used for pushing the arc-shaped pressing block (53) to translate in the gap between the two adjacent fan-shaped blocks (6) towards the central axis of the lower core mold (12); and after the embryo material is pressed and formed, the pushing cylinder (51) is used for pushing the arc-shaped pressing block (53) to translate in the gap between the two adjacent fan-shaped blocks (6) away from the central axis of the lower core mold (12).

4. The matched-die system of claim 1, wherein, The upper mold mechanism comprises a second pressing cylinder (21) and an upper core mold (22), the second pressing cylinder (21) is arranged at the top of the rack (1), the upper core mold (22) is vertically arranged at the bottom of the piston rod of the second pressing cylinder (21), and the central axis of the upper core mold (22) coincides with the central axis of the lower core mold (12). The second pressing cylinder (21) is used to push the upper core mold (22) to descend until the lower surface of the upper core mold (22) abuts against the upper surface of the lower core mold (12) after the iron core for rolling is placed on the top of the lower core mold (12); and the second pressing cylinder (21) pushes the upper core mold (22) to ascend by a preset height after the blank is pressed and formed.

5. The side press roll forming die system of claim 1, wherein, The pushing-out mechanism comprises a pushing-out cylinder (31), a lower pushing plate (32), an upper pushing plate (33) and a pushing rod (34), the bottom of the frame (1) is provided with a supporting plate (35) below the frame plate (11), the pushing-out cylinder (31) is arranged at the bottom of the supporting plate (35), the lower pushing plate (32) is arranged at the top of the supporting plate and connected with the pushing rod (34) of the pushing-out cylinder (31), a circular annular groove is formed in the outer side of the lower core mold (12) on the upper surface of the frame plate (11), the upper pushing plate (33) is arranged in the annular groove, the bottom end of the pushing rod (34) is fixed on the lower pushing plate (32), and the top end of the pushing rod (34) penetrates through the frame plate (11) and is fixed on the upper pushing plate (33). The pushing-out cylinder (31) is used to push the lower pushing plate (32) to ascend after the blank is pressed and formed, and the lower pushing plate (32) is used to drive the upper pushing plate (33) to ascend through the pushing rod (34) so as to push the rolling blank body upward.

6. The matched-die system of any of claims 1-5, wherein, The number of the side pressing mechanisms and the number of the fan-shaped blocks (6) are both four, the cross section of the fan-shaped blocks (6) is fan-shaped and the central angle is 90°.

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