An electric fireplace rear cover processing and forming equipment, a forming process and an electric fireplace

Abstract

The present application belongs to the field of electric fireplace processing technology, and particularly relates to an electric fireplace rear cover processing and forming equipment, a forming process and an electric fireplace. The equipment comprises a core for bearing a workpiece to be processed; and a supporting plate movably sleeved on the outer periphery of the core, and provided with a flange lower boss on its upper surface. The equipment first presses the middle part of the workpiece, and then clamps the edge of the workpiece, thereby effectively preventing the middle part of the workpiece from being hollow or warped, and improving the forming yield. The flange upper boss and the flange lower boss maintain a gap allowing material flow during the drawing process, thereby avoiding the workpiece from being cracked, and ensuring the uniform thickness of the side wall. The first and second fillet portions of the inner hole of the pressing ring simultaneously form all the fillet transitions during the deep drawing forming of the side wall, and do not need subsequent separate processing, thereby reducing the process, improving the efficiency, and ensuring the consistency of the products. The pressing strip in the positioning pin elastically abuts against the edge of the workpiece through the third elastic element, and can adapt to the size deviation of the workpiece blank, thereby ensuring reliable positioning and facilitating the taking and placing.

Description

Technical Field

[0001] This invention relates to the field of electric fireplace processing technology, specifically to an electric fireplace rear cover processing and forming equipment, forming process, and electric fireplace thereof. Background Technology

[0002] Electric fireplaces, as a common indoor heating and decorative device, typically have a back cover made of thin metal sheet through stamping. The back cover generally has a rectangular groove structure with folded edges around the opening. In existing processing methods, a core and cavity mating method is often used, where the thin metal sheet is placed on the core, and the core is inserted into the cavity to complete the deep drawing process.

[0003] However, the existing processing methods still have shortcomings in actual production: the middle of the workpiece lacks effective pressure during the forming process, which easily leads to hollowing and warping. Furthermore, the rounded corners need to be processed separately afterward, which is cumbersome, has a low yield, and results in unsatisfactory performance.

[0004] Therefore, we propose a processing and forming equipment, forming process, and electric fireplace for the rear cover of an electric fireplace to solve the above problems. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides an electric fireplace rear cover processing and forming equipment, a forming process, and an electric fireplace thereof, which solves the problems mentioned in the background art of workpiece forming being prone to defects and requiring secondary processing.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0009] An electric fireplace rear cover processing and forming equipment, comprising:

[0010] The core is used to support the workpiece to be processed;

[0011] The support plate is movably sleeved on the outer periphery of the core, and its upper surface is provided with a folded lower boss;

[0012] The pressure block and the pressure ring are provided. The pressure ring is movably sleeved on the outer periphery of the pressure block. The bottom of the pressure ring is provided with a folded upper boss, and the inside of the pressure ring is provided with a rounded corner.

[0013] Both the pressure block and the pressure ring are configured to float elastically, and in the free state, the lower end face of the pressure block is lower than the lower end face of the upper boss on the folded edge;

[0014] A locking mechanism is used to selectively lock or release the pressure ring and the support plate.

[0015] Furthermore, it also includes a frame, with a worktable on top of the frame, and the core fixed on the worktable; an upper hydraulic cylinder is supported by multiple columns on the frame above the worktable, and a lower hydraulic cylinder is provided inside the frame; multiple guide rods are fixed to the bottom of the support plate, each guide rod slides through the worktable and extends into the frame, and the lower ends of each guide rod are connected to a connecting plate; the output end of the lower hydraulic cylinder is fixedly connected to the connecting plate to drive the support plate to rise and fall along the core.

[0016] Furthermore, the output end of the upper cylinder is connected to a load plate, the load plate is provided with linear bearings that slide with each column, and a pressure plate is fixedly connected to the bottom of the load plate; the pressure block is suspended below the pressure plate by a first elastic element, and the pressure ring is sleeved on the outer periphery of the pressure block and suspended below the pressure plate by a second elastic element;

[0017] The first elastic element is a compression spring, which keeps the lower end face of the pressure block lower than the lower end face of the upper boss on the folded edge when not in operation; the bottom of the pressure plate is provided with multiple fixing rods, the lower end of each fixing rod slides into the pressure ring and the end is provided with a stop part; the second elastic element is sleeved on the fixing rod, and its two ends abut against the inner wall of the pressure ring and the stop part respectively, which presses the pressure ring against the bottom surface of the pressure plate when not in operation.

[0018] Furthermore, the pressure ring has a rectangular inner hole, and a first rounded corner is provided at the top of the inner hole and at the corners between the side walls around the inner hole, and a second rounded corner is provided at the bottom opening of the inner hole.

[0019] Furthermore, the locking mechanism includes:

[0020] Multiple linkage rods are fixed to the bottom of the pressure ring and located on the outside of the boss on the folded edge, and each linkage rod has a positioning hole at its lower end;

[0021] The pallet is provided with linkage grooves that correspond one-to-one with each linkage rod, and a positioning rod is slidably arranged inside the pallet corresponding to each linkage groove.

[0022] A power source, mounted on the support plate, is used to drive the positioning rod to extend into or retract from the positioning hole, so as to lock or release the pressure ring from the support plate.

[0023] Furthermore, there are four linkage rods distributed at the four corners of the bottom of the pressure ring; the inside of the opposite sides of the support plate is provided with a drive cavity extending in the horizontal direction, and the top of each drive cavity is provided with the linkage groove.

[0024] Each of the driving cavities has two positioning rods slidably disposed within it, with the two positioning rods located at opposite ends of the driving cavity; each of the driving cavities also has two nut seats that can move toward or away from each other, and the two positioning rods are connected to the corresponding nut seats via levers; the power source drives the two nut seats to move toward or away from each other, thereby causing the two positioning rods to extend and retract synchronously.

[0025] Furthermore, the power source includes a servo geared motor and a horizontally arranged lead screw. The lead screw is rotatably mounted inside the support plate and runs horizontally below the drive cavity. The lead screw and the servo geared motor are connected by a bevel gear pair. The lead screw has two threaded sections with opposite directions of rotation, which are threadedly connected to two nut seats in the same drive cavity to drive the two positioning rods to extend and retract synchronously.

[0026] The workbench is also equipped with a clearance hole located below the servo geared motor.

[0027] Furthermore, the top of the pallet is detachably equipped with several positioning pins on the outside of the lower boss of the folded edge. Each positioning pin is provided with a vertical pressure strip. The pressure strip is installed in the positioning pin through a third elastic element, and one side of the pressure strip extends elastically out of the positioning pin to elastically hold the edge of the workpiece. The positioning pin is also provided with fasteners to adjust the extension amount of the pressure strip.

[0028] A molding process for an electric fireplace rear cover processing and molding equipment includes the following steps:

[0029] S1. Place the workpiece on top of the core. The workpiece edge is supported by the folded edge boss of the support plate, and the workpiece is initially positioned by the positioning pin.

[0030] S2. Press the middle part of the workpiece, the upper oil cylinder drives the pressure block to press down, pressing the area of ​​the workpiece corresponding to the bottom wall of the rear cover;

[0031] S3. Clamp the edge and lock it. The upper cylinder continues to descend, driving the pressure ring down to clamp the workpiece edge between the upper and lower folding bosses. The pressure ring is then locked to the support plate by the locking mechanism.

[0032] S4. Deep drawing: The lower cylinder drives the support plate to descend. The support plate pulls down the pressure ring through the linkage rod. The upper and lower bosses of the folded edge clamp the workpiece edge and draw it downward to form the side wall. At the same time, the first and second rounded corners of the inner hole of the pressure ring are formed to form the corresponding rounded corner transitions.

[0033] S5. Unlock and reset: Release the locking mechanism, reset the upper cylinder to allow the pressure block and pressure ring to elastically reset, reset the lower cylinder to allow the pallet to rise, and remove the molded cover.

[0034] An electric fireplace includes a fireplace body and a rear cover manufactured using the molding process described above, the rear cover being mounted on the fireplace body.

[0035] (III) Beneficial Effects

[0036] Compared with the prior art, the present invention provides an electric fireplace rear cover processing and forming equipment, a forming process, and an electric fireplace thereof, which has the following beneficial effects:

[0037] This invention effectively prevents hollow areas or warping in the center of the workpiece by first pressing the workpiece with a pressure block and then clamping the workpiece edge with a pressure ring, thus improving the forming yield. The upper and lower bosses of the folded edge maintain a gap that allows material flow during the pulling process, preventing the workpiece from tearing and ensuring uniform sidewall thickness. The first and second rounded corners of the inner hole of the pressure ring form all the rounded corner transitions in one step while drawing and forming the sidewall, eliminating the need for subsequent separate processing, resulting in fewer steps, higher efficiency, and better product consistency. The pressure strip inside the positioning pin elastically holds the edge of the workpiece through a third elastic element, which can adapt to the dimensional deviation of the workpiece blank, ensuring reliable positioning and easy handling. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the core structure of the present invention;

[0039] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle;

[0040] Figure 3 This is a schematic diagram of the frame structure of the present invention;

[0041] Figure 4 This is a cross-sectional view of the drive cavity structure of the present invention;

[0042] Figure 5 This is a schematic diagram of the pressing block structure of the present invention;

[0043] Figure 6 This is a schematic diagram of the molded core and pressure block of the present invention in the mold-closed state.

[0044] Figure 7 This is a cross-sectional view of the positioning pin structure of the present invention;

[0045] Figure 8 This is a schematic diagram of the main structure of the fireplace of the present invention;

[0046] Figure 9 This is a schematic diagram of the main structure of the fireplace of the present invention;

[0047] Figure 10 This is a schematic diagram of the molding process of the present invention.

[0048] In the diagram: 1. Core; 2. Support plate; 21. Guide rod; 22. Connecting plate; 23. Lower boss of folded edge; 24. Linkage groove; 25. Positioning rod; 251. Toggle rod; 26. Drive cavity; 27. Nut seat; 28. Servo geared motor; 29. ​​Lead screw; 3. Pressure block; 4. Pressure ring; 41. Inner hole; 42. First rounded corner; 43. Second rounded corner; 44. Upper boss of folded edge; 5. Locking mechanism; 51. Linkage rod; 52. Positioning hole; 6. Frame; 61. Worktable; 62. Column; 63. Upper cylinder; 64. Lower cylinder; 65. Load plate; 66. Pressure plate; 661. First elastic element; 662. Second elastic element; 67. Fixing rod; 7. Positioning pin; 71. Pressure strip; 72. Third elastic element; 73. Fastener; 8. Rear cover; 9. Fireplace body. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Example

[0051] like Figure 1-8 As shown, an embodiment of the present invention provides a processing and forming device for the rear cover of an electric fireplace, comprising:

[0052] Core 1 is used to support the workpiece to be processed;

[0053] The support plate 2 is movably sleeved on the outer periphery of the core 1, and its upper surface is provided with a folded lower protrusion 23;

[0054] The pressure block 3 and the pressure ring 4 are movably sleeved on the outer periphery of the pressure block 3. The bottom of the pressure ring 4 is provided with a folded upper boss 44, and the inside of the pressure ring 4 is provided with a rounded corner.

[0055] Both the pressure block 3 and the pressure ring 4 are configured to float elastically, and in the free state, the lower end face of the pressure block 3 is lower than the lower end face of the upper boss 44 on the folded edge;

[0056] The locking mechanism 5 is used to selectively lock or release the pressure ring 4 and the support plate 2.

[0057] like Figure 1-8As shown, in some embodiments, a frame 6 is also included. A worktable 61 is provided on the top of the frame 6, and the core 1 is fixed on the worktable 61. An upper hydraulic cylinder 63 is supported on the frame 6 above the worktable 61 by multiple columns 62. A lower hydraulic cylinder 64 is provided inside the frame 6. Multiple guide rods 21 are fixed to the bottom of the support plate 2. Each guide rod 21 slides through the worktable 61 and extends into the frame 6. The lower ends of each guide rod 21 are connected to a connecting plate 22. The output end of the lower hydraulic cylinder 64 is fixedly connected to the connecting plate 22 to drive the support plate 2 to rise and fall along the core 1.

[0058] A worktable 61 is provided on the top of the frame 6, and the core 1 is fixed on the worktable 61. The worktable 61 provides the mounting base for the core 1 and the support plate 2. Multiple columns 62 support the upper hydraulic cylinder 63 above the worktable 61, and the upper hydraulic cylinder 63 provides downward driving force for the pressure block 3 and the pressure ring 4. The lower hydraulic cylinder 64 is located inside the frame 6, and its output end is fixedly connected to the connecting plate 22. Multiple guide rods 21 are fixedly connected to the bottom of the support plate 2. Each guide rod 21 slides through the worktable 61 and extends into the interior of the frame 6, and the lower ends of each guide rod 21 are connected to the connecting plate 22. When the lower hydraulic cylinder 64 drives the connecting plate 22 to rise and fall, the support plate 2 is driven to rise and fall along the core 1 through the guide rods 21. The sliding cooperation between the guide rods 21 and the worktable 61 also guides the rising and falling movement of the support plate 2.

[0059] The upper hydraulic cylinder 63 and the lower hydraulic cylinder 64 drive the pressure block 3, the pressure ring 4, and the support plate 2 respectively, achieving independent bidirectional driving without interference between their actions, and providing flexible control. Multiple guide rods 21 are connected to the connecting plate 22, ensuring uniform force distribution and smooth operation of the support plate 2 during lifting and lowering, preventing the support plate 2 from tilting and causing a decrease in molding accuracy. The lower hydraulic cylinder 64 is built into the frame 6, resulting in a compact structure and saving space.

[0060] The upper cylinder 63 is a cylinder with controllable stroke, such as a servo cylinder or a proportional control cylinder, which can accurately control the downward stroke of the pressure block 3 and the pressure ring 4, ensuring that the distance the pressure plate 66 continues to descend after the pressure block 3 contacts the workpiece is precisely controllable, thereby ensuring the stable compression of the first elastic element 661, and the accurate positioning of the pressure ring 4 when it descends to the position where the upper boss 44 of the folded edge and the lower boss 23 of the folded edge mate.

[0061] The lower cylinder 64 is a cylinder with controllable stroke, such as a servo cylinder or a proportional control cylinder, which can accurately control the rising and resetting stroke and the drawing and lowering stroke of the support plate 2, ensuring that the top surface of the folded lower boss 23 after the support plate 2 rises is precisely flush with the top surface of the core 1, and that the drawing depth is consistent during drawing, thus ensuring the accurate height dimension of the side wall of the rear cover 8.

[0062] like Figure 1-8As shown, in some embodiments, the output end of the upper cylinder 63 is connected to a load plate 65, and the load plate 65 is provided with linear bearings that slide with each column 62; a pressure plate 66 is fixedly connected to the bottom of the load plate 65, the pressure block 3 is suspended below the pressure plate 66 by a first elastic element 661, and the pressure ring 4 is sleeved on the outer periphery of the pressure block 3 and suspended below the pressure plate 66 by a second elastic element 662, so as to realize the elastic floating of the pressure block 3 and the pressure ring 4 respectively;

[0063] The first elastic element 661 is a compression spring, which keeps the lower end face of the pressure block 3 lower than the lower end face of the upper boss 44 of the folded edge when not in operation. The bottom of the pressure plate 66 is provided with a plurality of downwardly extending fixing rods 67. The lower end of each fixing rod 67 slides into the pressure ring 4 and has a stop at its end. The second elastic element 662 is a spring sleeved on the fixing rod 67. Its two ends abut against the inner wall of the pressure ring 4 and the stop respectively. When not in operation, it presses the pressure ring 4 against the bottom surface of the pressure plate 66.

[0064] The output end of the upper cylinder 63 is connected to a load plate 65. The load plate 65 is slidably engaged with each column 62 via linear bearings, and the columns 62 provide guidance for the lifting and lowering of the load plate 65. A pressure plate 66 is fixedly connected to the bottom of the load plate 65. The pressure block 3 is suspended below the pressure plate 66 by a first elastic element 661, and the pressure ring 4 is sleeved on the outer periphery of the pressure block 3 and suspended below the pressure plate 66 by a second elastic element 662. In the non-working state, the first elastic element 661 keeps the lower end face of the pressure block 3 lower than the lower end face of the upper boss 44 on the folded edge, and the second elastic element 662 presses the pressure ring 4 against the bottom surface of the pressure plate 66. The bottom of the pressure plate 66 is provided with multiple downwardly extending fixing rods 67. The lower end of each fixing rod 67 slides into the pressure ring 4 and has a stop at its end. The second elastic element 662 is sleeved on the fixing rod 67 and its two ends abut against the inner wall of the pressure ring 4 and the stop, respectively. When the pressure block 3 contacts the workpiece, the pressure plate 66 continues to descend, the first elastic element 661 is compressed, the pressure plate 66 moves down relative to the pressure block 3 and drives the pressure ring 4 to descend synchronously; when the support plate 2 drives the pressure ring 4 to pull down, the pressure ring 4 moves down relative to the pressure plate 66 along the fixed rod 67 and compresses the second elastic element 662.

[0065] Through the cooperation of the first elastic element 661 and the second elastic element 662, the timing sequence of the pressing block 3 and the pressing ring 4 is achieved; the pressing block 3 first presses the middle of the workpiece, and then the pressing ring 4 clamps the edge of the workpiece, effectively preventing the middle of the workpiece from becoming hollow or warped. The linear bearing and the column 62 cooperate to provide precise lifting guidance for the pressure plate 66, the pressing block 3 and the pressing ring 4, ensuring the alignment accuracy with the core 1. The fixed rod 67 and the stop limit the floating stroke of the pressing ring 4, and the preload of the second elastic element 662 ensures that the pressing ring 4 always fits against the bottom surface of the pressure plate 66 when not in operation, avoiding shaking that affects the positioning accuracy.

[0066] like Figure 1-8As shown, in some embodiments, the pressure ring 4 has a rectangular inner hole 41, and a first rounded corner portion 42 is provided at the top of the inner hole 41 and at the corner between the side walls of the inner hole 41. A second rounded corner portion 43 is provided at the bottom opening of the inner hole 41.

[0067] The pressure ring 4 has a rectangular inner hole 41, the size of which is adapted to the shape of the core 1. A first rounded corner portion 42 is provided at the top of the inner hole 41 and at the corners between the side walls of the inner hole 41. During the downward pulling process of the pressure ring 4, the first rounded corner portion 42 cooperates with the core 1 to extrude the workpiece material at the corners to form a rounded transition. A second rounded corner portion 43 is provided at the bottom opening of the inner hole 41. When the pressure ring 4 is pulled down, it acts on the connection between the workpiece flange and the side wall, extruding the workpiece material at this connection to form a rounded transition.

[0068] While the sidewall is being drawn and formed, the first rounded corner portion 42 and the second rounded corner portion 43 are formed in one step to create all the rounded corner transitions, eliminating the need for subsequent separate rounded corner processing, reducing the number of processes and improving production efficiency. The rounded corner portions are extruded in conjunction with the core 1, resulting in smooth and uniform rounded corner transitions, good product consistency, avoiding stress concentration at sharp corners, and enhancing the structural strength of the rear cover 8.

[0069] like Figure 1-8 As shown, in some embodiments, the locking mechanism 5 includes:

[0070] Multiple linkage rods 51 are fixed to the bottom of the pressure ring 4 and located on the outside of the upper boss 44 of the folded edge. Each linkage rod 51 has a positioning hole 52 at its lower end.

[0071] The pallet 2 is provided with linkage grooves 24 corresponding to each linkage rod 51, and a positioning rod 25 is slidably arranged inside the pallet 2 at each linkage groove 24.

[0072] A power source, installed on the support plate 2, is used to drive the positioning rod 25 to extend into or out of the positioning hole 52, so as to lock or release the pressure ring 4 and the support plate 2.

[0073] Multiple linkage rods 51 are fixed to the bottom of the pressure ring 4 and located outside the upper boss 44 of the folded edge to avoid interference with the forming area. Each linkage rod 51 has a positioning hole 52 at its lower end. The support plate 2 has linkage grooves 24 corresponding to each linkage rod 51. Positioning rods 25 are slidably arranged inside the support plate 2 at each linkage groove 24. The power source is installed on the support plate 2. When the pressure ring 4 descends to the point where the upper boss 44 and the lower boss 23 of the folded edge limit the edge of the workpiece, the lower end of the linkage rod 51 is inserted into the corresponding linkage groove 24. At this time, the positioning hole 52 and the positioning rod 25 are coaxially aligned. The power source drives the positioning rod 25 to extend into the positioning hole 52, realizing the locking of the pressure ring 4 and the support plate 2. When the locking is released, the power source drives the positioning rod 25 to exit the positioning hole 52, and the pressure ring 4 is disengaged from the support plate 2. When the locking plate 2 is pulled down, the upper boss 44 and the lower boss 23 of the folded edge clamp the edge of the workpiece and move down synchronously. A gap is maintained between the two to allow the workpiece material to flow. The workpiece edge material flows towards the core 1 during the deep drawing process, forming the side wall and fold of the rear cover 8.

[0074] The pin-type locking structure of the linkage rod 51 and the positioning rod 25 ensures a reliable connection between the pressure ring 4 and the support plate 2 before the pull-down forming process, guaranteeing that the pressure ring 4 can follow synchronously when the support plate 2 is pulled down. A gap is maintained between the upper boss 44 and the lower boss 23 of the folded edge to allow material flow. This not only limits and guides the edge of the workpiece during the pull-down process but also prevents excessive clamping from hindering the material flow towards the core 1, thus avoiding workpiece tearing and ensuring complete sidewall forming and uniform thickness. After locking, there is no relative movement between the pressure ring 4 and the support plate 2, ensuring forming accuracy.

[0075] like Figure 1-8 As shown, in some embodiments, there are four linkage rods 51, distributed at the four corners of the bottom of the pressure ring 4; the inside of the opposite sides of the support plate 2 is provided with a drive cavity 26 extending in the horizontal direction, and the top of each end of the drive cavity 26 is provided with the linkage groove 24.

[0076] Each of the driving cavities 26 has two positioning rods 25 slidably disposed therein, with the two positioning rods 25 located at both ends of the driving cavity 26 respectively; each of the driving cavities 26 also has two nut seats 27 that can move toward or away from each other, and the two positioning rods 25 are respectively connected to the corresponding nut seats 27 through levers 251; the power source drives the two nut seats 27 to move toward or away from each other, thereby driving the two positioning rods 25 to extend and retract synchronously.

[0077] Four linkage rods 51 are distributed at the four corners of the bottom of the pressure ring 4, so that the locking force is evenly applied around the pressure ring 4. The support plate 2 has a horizontally extending drive cavity 26 on each of its opposite sides. Each drive cavity 26 has a linkage groove 24 at its top end, and the four linkage rods 51 correspond one-to-one with the four linkage grooves 24. Two positioning rods 25 are slidably disposed within each drive cavity 26, located at opposite ends of the drive cavity 26. Each drive cavity 26 also has two nut seats 27 that can move towards or away from each other. The two positioning rods 25 are connected to their respective nut seats 27 via levers 251. When the power source drives the two nut seats 27 to move towards each other, the two positioning rods 25 extend synchronously; when the power source drives the two nut seats 27 to move away from each other, the two positioning rods 25 retract synchronously.

[0078] Four linkage rods 51 are distributed at the four corners of the pressure ring 4, ensuring symmetrical and uniform force during locking, preventing the pressure ring 4 from tilting during the pull-down process, and guaranteeing consistent drawing depth on all four sides of the workpiece. The two drive cavities 26 on both sides control two positioning rods 25 respectively, achieving synchronous locking or releasing at four points with good consistency of action. The positioning rods 25 are connected to the nut seat 27 via levers 251, ensuring direct transmission and reliable structure.

[0079] like Figure 1-8 As shown, in some embodiments, the power source includes a servo geared motor 28 and a horizontally arranged lead screw 29. The lead screw 29 is rotatably mounted inside the support plate 2 and extends across the drive cavity 26. The lead screw 29 and the servo geared motor 28 are connected by a bevel gear pair. The lead screw 29 has two threaded sections with opposite directions of rotation, which are threadedly connected to two nut seats 27 in the same drive cavity 26 to drive the two positioning rods 25 to extend and retract synchronously.

[0080] The workbench 61 is also provided with a clearance hole located below the servo reduction motor 28.

[0081] A servo geared motor 28 is mounted at the bottom of the support plate 2. Its output end is connected to a horizontally positioned lead screw 29 via a bevel gear pair, enabling vertical power transmission. The lead screw 29 is rotatably mounted inside the support plate 2 and extends across the drive cavity 26. The lead screw 29 has two threaded sections with opposite directions of rotation, which are threadedly connected to two nut seats 27 within the same drive cavity 26. When the servo geared motor 28 drives the lead screw 29 to rotate forward, the two reverse-rotating threads cause the two nut seats 27 to move towards each other, which in turn causes the two positioning rods 25 to extend synchronously via the lever 251. When the lead screw 29 rotates in reverse, the two positioning rods 25 retract synchronously. The worktable 61 has a clearance hole located below the servo geared motor 28 to provide space for the servo geared motor 28 to move as it rises and falls with the support plate 2.

[0082] The servo geared motor 28, in conjunction with the lead screw 29, drives the positioning rod 25 to extend and retract, providing precise control, accurate locking, and rapid unlocking. The threaded engagement between the lead screw 29 and the nut seat 27 has a self-locking characteristic, ensuring that the positioning rod 25 will not accidentally disengage due to external force when locked, thus guaranteeing the reliability of the locking process during the pull-down forming. The same lead screw 29 simultaneously drives two positioning rods 25, resulting in a compact structure and completely synchronized movements of the two positioning rods 25, ensuring consistent locking. The clearance hole prevents interference when the servo geared motor 28 moves up and down with the support plate 2, increasing the lifting stroke of the support plate 2.

[0083] like Figure 1-8 As shown, in some embodiments, the top of the support plate 2 is detachably mounted with a plurality of positioning pins 7 on the outside of the lower boss 23 of the folded edge. Each positioning pin 7 is provided with a vertical pressure strip 71. The pressure strip 71 is installed in the positioning pin 7 through a third elastic member 72, and one side of it extends elastically out of the outside of the positioning pin 7 to elastically abut against the edge of the workpiece. The positioning pin 7 is also provided with a fastener 73 to adjust the extension amount of the pressure strip 71.

[0084] Several locating pins 7 are detachably mounted on the top of the support plate 2 via insertion holes located on the outside of the lower flange 23 of the folded edge, for initial positioning of the workpiece to be processed. Each locating pin 7 has a vertical pressure strip 71, which is installed inside the locating pin 7 via a third elastic element 72, with one side elastically extending outward from the locating pin 7. When the workpiece is placed in, the pressure strip 71 elastically abuts against the edge of the workpiece under the action of the third elastic element 72, pushing the workpiece towards the core 1 for positioning. The locating pin 7 is also provided with a fastener 73, and the distance by which the pressure strip 71 extends outward from the side of the locating pin 7 can be changed by adjusting the fastener 73.

[0085] The pressure bar 71 elastically abuts against the edge of the workpiece via the third elastic element 72, providing reliable positioning while also offering some flexibility for easy placement and removal. It also accommodates slight deviations in the workpiece's blank size, preventing overly tight positioning that prevents placement or overly loose positioning that leads to misalignment. The fastener 73 is a bolt, with its smooth section adjustable to the positioning pin 7, and its threaded section threaded into the pressure bar 71. By controlling the depth of the threaded section into the pressure bar 71, the extension of the pressure bar 71 can be adjusted. This allows for flexible adjustment of the positioning force when the pressure bar 71 wears down after long-term use or when replacing different batches of workpieces. The positioning pin 7 is detachable for easy replacement and maintenance.

[0086] like Figure 1-10 As shown in the figure, a molding process for an electric fireplace rear cover processing and molding equipment according to an embodiment of the present invention includes the following steps:

[0087] S1. Place the workpiece on top of the core 1. The workpiece edge is supported by the folded lower boss 23 of the support plate 2, and the workpiece edge is elastically held by the pressure strip 71 in the positioning pin 7 under the action of the third elastic element 72 to perform initial positioning of the workpiece.

[0088] S2. Press the middle part of the workpiece. The upper cylinder 63 drives the load plate 65 to descend. The load plate 65 drives the pressure block 3 to press down through the pressure plate 66 and the first elastic element 661. The pressure block 3 contacts the workpiece before the pressure ring 4 and presses the area of ​​the bottom wall of the corresponding rear cover 8. At this time, the pressure plate 66 continues to descend and compress the first elastic element 661, eliminating the floating space between the pressure block 3 and the pressure plate 66.

[0089] S3. Clamp the edge and lock it. The upper cylinder 63 continues to drive the pressure plate 66 downward. The pressure plate 66 drives the pressure ring 4 to descend until the upper boss 44 and the lower boss 23 of the folded edge limit the edge of the workpiece to be between them. At this time, the lower end of each linkage rod 51 is inserted into the corresponding linkage groove 24, and the positioning hole 52 and the positioning rod 25 are coaxially aligned. The power source drives the positioning rod 25 to extend into the positioning hole 52 and lock the pressure ring 4 and the support plate 2.

[0090] S4. Deep drawing: The lower cylinder 64 drives the connecting plate 22 to descend. The connecting plate 22 drives the support plate 2 to descend along the core 1 through the guide rod 21. The support plate 2 pulls down the pressure ring 4 through the locked linkage rod 51. The pressure ring 4 descends along the fixed rod 67 relative to the pressure plate 66 and compresses the second elastic element 662. The inner hole 41 transitions from being sleeved outside the pressure block 3 to being sleeved outside the core 1. The upper boss 44 and the lower boss 23 of the folded edge clamp the edge of the workpiece and pull it down. The material at the edge of the workpiece flows towards the core 1. The side wall of the rear cover 8 is formed between the core 1 and the inner hole 41. At the same time, the first rounded corner 42 forms the rounded corner transition between adjacent side walls and between the side wall and the bottom wall. The second rounded corner 43 forms the rounded corner transition at the connection between the side wall and the folded edge, thus obtaining the preliminary formed body of the rear cover 8.

[0091] S5. Unlock and reset: The power source drives the positioning rod 25 to exit the positioning hole 52, releasing the lock between the pressure ring 4 and the support plate 2; the second elastic element 662 rebounds and pushes the pressure ring 4 to rise and reset along the fixing rod 67 to fit the bottom surface of the pressure plate 66; the upper oil cylinder 63 drives the pressure plate 66, the pressure block 3 and the pressure ring 4 to rise and reset as a whole; the first elastic element 661 rebounds and restores the pressure block 3 to the state where its lower end face is lower than the lower end face of the upper boss 44 of the folded edge; the lower oil cylinder 64 drives the support plate 2 to rise and reset until the top surface of the lower boss 23 of the folded edge is flush with the top surface of the core 1, and the rear cover 8 is removed to form the initial body.

[0092] S6. Subsequent processing: punching, bending and galvanizing are performed on the preliminary formed body of the rear cover 8 to obtain the finished rear cover 8.

[0093] like Figure 1-10As shown, an embodiment of the present invention provides an electric fireplace, including a fireplace body 9 and a rear cover 8 manufactured using the molding process described above, the rear cover 8 being installed on the fireplace body 9.

[0094] In summary, through the cooperation of the first elastic element 661 and the second elastic element 662, the timing sequence of the pressing block 3 first presses the middle of the workpiece, and then the pressing ring 4 clamps the edge of the workpiece is achieved, effectively preventing the middle of the workpiece from becoming hollow or warped. The locking mechanism 5 reliably locks the pressing ring 4 and the support plate 2 through the pin-type cooperation of the linkage rod 51 and the positioning rod 25. When the support plate 2 is pulled down, the upper boss 44 and the lower boss 23 of the folded edge clamp the edge of the workpiece and move down synchronously, maintaining a gap between them that allows material flow. The material at the edge of the workpiece flows towards the core 1, and the sidewall is drawn and formed between the core 1 and the inner hole 41. The first rounded corner 42 at the top of the inner hole 41 and the first rounded corner 42 at the corners of the surrounding sidewalls cooperate with the core 1 during the drawing process to form the rounded corner transition between adjacent sidewalls and between the sidewall and the bottom wall in one step. The second rounded corner 43 at the bottom opening of the inner hole 41 is simultaneously formed to form the rounded corner transition at the connection between the sidewall and the folded edge, without the need for subsequent separate processing. The pressure strip 71 inside the positioning pin 7 elastically abuts against the edge of the workpiece through the third elastic element 72, which can adapt to the size deviation of the workpiece blank, ensure reliable positioning and facilitate the handling of the workpiece.

[0095] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A processing and forming equipment for the rear cover of an electric fireplace, characterized in that, include: Core (1) is used to support the workpiece to be processed; The support plate (2) is movably sleeved on the outer periphery of the core (1), and its upper surface is provided with a folded lower boss (23). The pressure block (3) and the pressure ring (4) are movably sleeved on the outer periphery of the pressure block (3). The bottom of the pressure ring (4) is provided with a folded upper boss (44), and the inside of the pressure ring (4) is provided with a rounded corner. Both the pressure block (3) and the pressure ring (4) are configured to float elastically, and in the free state, the lower end face of the pressure block (3) is lower than the lower end face of the upper boss (44) on the folded edge; The locking mechanism (5) is used to selectively lock or release the pressure ring (4) and the support plate (2).

2. The electric fireplace rear cover processing and forming equipment according to claim 1, characterized in that: It also includes a frame (6), the top of which is provided with a worktable (61), and the core (1) is fixed on the worktable (61); an upper cylinder (63) is supported on the frame (6) above the worktable (61) by multiple columns (62), a lower cylinder (64) is provided inside the frame (6), and multiple guide rods (21) are fixedly connected to the bottom of the pallet (2). Each guide rod (21) slides through the worktable (61) and extends into the frame (6), and the lower ends of each guide rod (21) are connected to a connecting plate (22). The output end of the lower cylinder (64) is fixedly connected to the connecting plate (22) to drive the pallet (2) to rise and fall along the core (1).

3. The electric fireplace rear cover processing and forming equipment according to claim 2, characterized in that: The output end of the upper cylinder (63) is connected to a load plate (65). The load plate (65) is provided with linear bearings that slide with each column (62). A pressure plate (66) is fixedly connected to the bottom of the load plate (65). The pressure block (3) is suspended below the pressure plate (66) by a first elastic element (661). The pressure ring (4) is sleeved on the outer periphery of the pressure block (3) and suspended below the pressure plate (66) by a second elastic element (662). The first elastic element (661) is a compression spring. In the non-working state, it keeps the lower end face of the pressure block (3) lower than the lower end face of the upper boss (44) on the folded edge. The bottom of the pressure plate (66) is provided with multiple fixing rods (67). The lower end of each fixing rod (67) slides into the pressure ring (4) and the end is provided with a stop. The second elastic element (662) is sleeved on the fixing rod (67). Its two ends abut against the inner wall of the pressure ring (4) and the stop, respectively. In the non-working state, it presses the pressure ring (4) against the bottom surface of the pressure plate (66).

4. The electric fireplace rear cover processing and forming equipment according to claim 1, characterized in that: The pressure ring (4) has a rectangular inner hole (41). The top of the inner hole (41) and the corners between the side walls of the inner hole (41) are provided with a first rounded corner (42). The bottom opening of the inner hole (41) is provided with a second rounded corner (43).

5. The electric fireplace rear cover processing and forming equipment according to claim 2, characterized in that, The locking mechanism (5) includes: Multiple linkage rods (51) are fixed at the bottom of the pressure ring (4) and located on the outside of the upper boss (44) of the folded edge. Each linkage rod (51) has a positioning hole (52) at its lower end. The tray (2) has a linkage groove (24) corresponding to each linkage rod (51), and a positioning rod (25) is slidably arranged inside the tray (2) at each linkage groove (24). The power source is installed on the tray (2) to drive the positioning rod (25) to extend into or out of the positioning hole (52) so as to lock or release the pressure ring (4) and the tray (2).

6. The electric fireplace rear cover processing and forming equipment according to claim 5, characterized in that: There are four linkage rods (51), which are distributed at the four corners of the bottom of the pressure ring (4); the support plate (2) has a drive cavity (26) extending horizontally on both sides, and the top of each drive cavity (26) has a linkage groove (24) at both ends. Two positioning rods (25) are slidably arranged in each of the drive cavities (26), and the two positioning rods (25) are located at both ends of the drive cavity (26); two nut seats (27) that can move towards or away from each other are also provided in each of the drive cavities (26), and the two positioning rods (25) are connected to the corresponding nut seats (27) through levers (251); the power source drives the two nut seats (27) to move towards or away from each other, thereby driving the two positioning rods (25) to extend and retract synchronously.

7. The electric fireplace rear cover processing and forming equipment according to claim 6, characterized in that: The power source includes a servo geared motor (28) and a horizontally arranged lead screw (29). The lead screw (29) is rotatably mounted inside the support plate (2) and runs horizontally below the drive cavity (26). The lead screw (29) and the servo geared motor (28) are connected by a bevel gear pair. The lead screw (29) has two threaded sections with opposite directions of rotation, which are threadedly connected to two nut seats (27) in the same drive cavity (26) to drive the two positioning rods (25) to extend and retract synchronously. The workbench (61) is also provided with a clearance hole located below the servo geared motor (28).

8. The electric fireplace rear cover processing and forming equipment according to claim 1, characterized in that: The top of the pallet (2) is detachably mounted with several positioning pins (7) on the outside of the folded edge lower boss (23). Each positioning pin (7) has a vertical pressure strip (71) inside. The pressure strip (71) is installed in the positioning pin (7) through a third elastic element (72). One side of the pressure strip extends elastically out of the outside of the positioning pin (7) to elastically hold the edge of the workpiece. The positioning pin (7) is also provided with a fastener (73) to adjust the extension amount of the pressure strip (71).

9. A molding process based on the electric fireplace rear cover processing and molding equipment according to any one of claims 1-8, characterized in that, Includes the following steps: S1. Place the workpiece on top of the core (1). The workpiece edge is supported by the folded lower boss (23) of the support plate (2), and the workpiece is initially positioned by the positioning pin (7). S2. Press the middle part of the workpiece, the upper oil cylinder (63) drives the pressure block (3) to press down, pressing the area of ​​the workpiece corresponding to the bottom wall of the rear cover (8); S3. Clamp the edge and lock it. The upper cylinder (63) continues to descend, driving the pressure ring (4) down to the upper boss (44) of the folded edge and the lower boss (23) of the folded edge to clamp the edge of the workpiece. The locking mechanism (5) locks the pressure ring (4) and the support plate (2). S4. Deep drawing: The lower cylinder (64) drives the support plate (2) to descend. The support plate (2) pulls down the pressure ring (4) through the linkage rod (51). The upper boss (44) and the lower boss (23) of the folded edge clamp the edge of the workpiece and draw it down to form the side wall. At the same time, the first rounded corner (42) and the second rounded corner (43) of the inner hole (41) are formed to form the corresponding rounded corner transitions. S5. Unlock and reset, release the locking mechanism (5), the upper cylinder (63) resets to make the pressure block (3) and pressure ring (4) elastically reset, the lower cylinder (64) resets to make the pallet (2) rise, and take out the molded cover (8).

10. An electric fireplace, comprising a fireplace body (9), characterized in that: It also includes a rear cover (8) manufactured using the molding process described in claim 9, the rear cover (8) being installed on the fireplace body (9).

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