A small wire diameter petal spring hot pressing setting device

Abstract

The utility model discloses a small line diameter petal spring hot press setting device relates to petal spring production and processing technical field, solved the problem that petal spring is easy to have thermal shrinkage deformation in annealing process. The hot press setting device includes: install lower die install lower die and include mounting panel and a plurality of vertical fixed limit rod on mounting panel, a plurality of limit rods can respectively along the outer contour and the inner contour distribution of petal spring, to form the limiting area for limiting a plurality of superimposed petal spring between a plurality of limit rods, press mechanism, press mechanism includes a plurality of can go up and down the press needle, a plurality of press needles all are located the just above of limiting area, and along the locus shape distribution of petal spring. The device can be compacted and positioned a plurality of superimposed petal spring on install lower die, make petal spring be in the stress annealing of laminated pressure and go, can completely eliminate the deformation in the heating process, guarantee product quality, realize batch production.

Description

Technical Field

[0001] This utility model relates to the field of petal spring production and processing technology, and in particular to a hot pressing and shaping device for small-diameter petal springs. Background Technology

[0002] Small-diameter petal springs are suitable for automotive interior parts. They are characterized by using small-diameter wire (commonly between 1.0-2.0 mm) and a petal-like shape (typically 5-6 petals). Due to these characteristics, a stress-relief annealing process is necessary in the manufacturing of these springs. The high temperatures of conventional annealing can cause thermal shrinkage deformation of the spring, resulting in warping deformation of the areas corresponding to the petals, leading to significant deviations in the spring's dimensions and flatness.

[0003] Therefore, multiple petal springs are usually stacked together and pressed into a specific fixture for positioning. Because this type of spring has a small wire diameter, simply inserting the springs one by one into the positioning fixture by hand is inefficient and difficult to insert due to wire deformation. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems by designing a hot-pressing and shaping device for small-diameter petal springs, which solves the problem of petal springs being prone to thermal shrinkage and deformation during the annealing process.

[0005] The technical solution of this utility model to achieve the above objectives is a hot-pressing and shaping device for a small-diameter petal spring. The petal spring has an inner contour and an outer contour. The hot-pressing and shaping device includes:

[0006] The lower mold is detachable and includes a mounting plate and several limiting rods vertically fixed on the mounting plate. The limiting rods are distributed along the outer and inner contours of the petal springs to form a limiting area between the limiting rods for limiting the several stacked petal springs.

[0007] The pressing mechanism includes multiple pressing pins that can move up and down. The multiple pressing pins are located directly above the limiting area and are distributed along the trajectory shape of the petal spring. There is at least one pressing pin directly above the area traversed by each arc edge of the petal spring in the limiting area.

[0008] As one implementation plan, it also includes:

[0009] Base plate;

[0010] A lower mold fixing plate is slidably disposed on the base plate, and the mounting plate is fixed to the lower mold fixing plate by screws;

[0011] Support plate, which is vertically fixed to the base plate;

[0012] The upper cover plate is fixedly supported above the installation of the lower mold by a support plate, and the pressing mechanism is installed on the upper cover plate.

[0013] The base plate is provided with a slide rail, and the lower mold fixing plate is horizontally slidably connected to the slide rail via a slider.

[0014] As one implementation, the pressing mechanism further includes a pressing cylinder and a pressure plate. The pressing cylinder is vertically fixed to the bottom of the upper cover plate, and the output end of the pressing cylinder is connected to the pressure plate. A plurality of pressing needles are vertically fixed to the bottom of the pressure plate.

[0015] In one embodiment, the mounting plate and the pressure plate have several mounting holes for mounting the limiting rod and the pressure pin, respectively.

[0016] As one implementation, the mounting plate has a material reduction hole in the middle.

[0017] As one implementation, handles are provided on both sides of the mounting plate.

[0018] In one implementation, three pressure pins are located directly above the area traversed by each arc edge of the petal spring in the limiting region.

[0019] In one implementation, the mounting plate has multiple bolt holes located around a plurality of limiting rods.

[0020] Its advantages over existing technologies are:

[0021] This invention employs a fixed pressing device to stack and fix petal springs one by one onto a specific tooling according to the design dimensions, ensuring they are in a shaped and compressed state for stress-relief annealing, thus eliminating deformation caused by the inherent characteristics of this type of spring. Specifically, multiple petal springs are stacked together and placed within the limiting area of ​​the lower mold. Multiple limiting rods limit the inner and outer contours of the petal springs. Then, a pressing mechanism controls multiple pressing pins to move downwards, with each pressing pin corresponding to a different part of the petal spring. The pressing pins compress the stacked petal springs, maintaining their shaped and compressed state, ensuring the flatness and dimensions of the springs, eliminating spring deformation during stress-relief annealing heating, guaranteeing product quality, and enabling mass production. Since the lower mold is detachable, it can be removed and then placed into the annealing furnace for the next annealing step. Because this type of spring has a small wire diameter, manually inserting each spring into the lower mold is inefficient and difficult due to wire deformation. This invention uses a pneumatic pressing device that presses in multiple points of force at once, effectively solving this problem. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the hot-pressing and shaping device for small-diameter petal springs;

[0023] Figure 2 This is a top view of the structure where the lower mold is installed;

[0024] Figure 3 This is a side view of the structure where the lower mold is installed;

[0025] Figure 4 This is a top view of multiple petal springs stacked together, with pressure pins pressing the petal springs onto the mounting mold.

[0026] Figure 5 This is a schematic diagram showing the installation of the lower mold and the limiting plate.

[0027] In the diagram: 1. Lower mold installation; 101. Mounting plate; 1011. Material reduction hole; 102. Limiting rod; 103. Handle; 2. Pressing mechanism; 201. Pressing cylinder; 202. Pressure plate; 203. Pressing needle; 3. Base plate; 4. Slide rail; 5. Slider; 6. Lower mold fixing plate; 7. Support plate; 8. Top cover plate; 9. Limiting plate; 10. Petal spring; 11. Long bolt. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] This invention employs a fixed pressing device to stack and fix the petal springs 10 one by one on a specific tooling according to the design dimensions, so that they are in a fixed pressing state to complete stress-relief annealing, which can eliminate the deformation caused by the inherent characteristics of this type of spring.

[0030] Because this type of spring has a small wire diameter, manually inserting each spring into the positioning fixture is inefficient and difficult due to wire deformation. This invention uses a pneumatic pressing device that presses in multiple points of force at once, effectively solving this problem.

[0031] To address the aforementioned issues, a preferred embodiment of this utility model proposes a hot-pressing and shaping device for small-diameter petal springs, used to press and position the petal spring 10 to prevent thermoplastic deformation of the petal spring 10 during the annealing process.

[0032] Referring to 4, in this embodiment, the petal spring 10 is petal-shaped with 5 petals and a hollow center, thus forming an inner and outer contour. The connection between two adjacent petals of the petal spring 10 is an arc-shaped edge.

[0033] See Figure 1 The hot pressing and shaping device mainly includes the following components: base plate 3, lower mold fixing plate 6, mounting lower mold 1, support plate 7, upper cover plate 8, and pressing mechanism 2.

[0034] The base plate 3 is a flat plate, on which two slide rails 4 are installed, arranged in parallel. The bottom of the lower mold fixing plate 6 is horizontally slidably connected to the two slide rails 4 via the slide rails 4. The lower mold fixing plate 6 is fixed to the slider 5 by screws.

[0035] See Figure 2 , Figure 3 The lower mold 1 is mainly composed of a mounting plate 101 and several limiting rods 102. The mounting plate 101 is fixed to the lower mold fixing plate 6 by screws, so the entire lower mold 1 is detachable.

[0036] A plurality of mounting holes are provided on the mounting plate 101, and each of the mounting holes corresponds to a plurality of limiting rods 102. The limiting rods 102 are vertically fixed on the mounting plate 101 through the aforementioned mounting holes.

[0037] Specifically, the limiting rod 102 is a round rod, and the distribution of the limiting rods 102 is divided into inner and outer layers. The outer layer of limiting rods 102 is evenly distributed along the outer contour of the petal spring 10, and the inner layer of limiting rods 102 is evenly distributed along the inner contour of the petal spring 10, so that a closed-loop limiting area is formed between the outer layer of limiting rods 102 and the inner layer of limiting rods 102. The petal spring 10 is sandwiched between the inner and outer layers of limiting rods 102 to achieve the positioning of the petal spring 10.

[0038] Multiple petal springs 10 are stacked one on top of the limiting area of ​​the mounting lower mold 1. In this embodiment, 15-20 petal springs 10 can be stacked on the mounting lower mold 1, depending on the size of the petal springs 10 and the length of the limiting rod 102.

[0039] The limiting rods 102 located on the inner and outer rings of the petal spring 10 are offset from each other, so that the positioning of several petal springs 10 can be achieved using as few limiting rods 102 as possible.

[0040] like Figure 1 As shown, there are two support plates 7, which are located on both sides of the mounting lower mold 1 and are vertically fixed on the base plate 3. The upper cover plate 8 is fixed on the top of the two support plates 7. The pressing mechanism 2 is installed at the bottom of the upper cover plate 8 and is used to press the petal springs 10 stacked on the mounting lower mold 1 below.

[0041] See also Figure 1The pressing mechanism 2 mainly consists of a pressing cylinder 201, a pressure plate 202, and multiple pressing needles 203. The pressing cylinder 201 is vertically fixed to the bottom of the upper cover plate 8, with its output end facing downwards. The output end of the pressing cylinder 201 is connected to the central area of ​​the pressure plate 202 to control the up and down movement of the pressure plate 202.

[0042] Multiple mounting holes are provided on the pressure plate 202, and each mounting hole corresponds to a pressure needle 203. The pressure needle 203 is set vertically and installed in the mounting hole.

[0043] Multiple pressure pins 203 are located directly above the limiting area of ​​the lower mold 1. The multiple pressure pins 203 are distributed along the trajectory of the petal spring 10. When the lower pressure cylinder 201 controls the pressure plate 202 to move up and down, the multiple pressure pins 203 press and position different parts of the petal spring 10.

[0044] See also Figure 4 In this embodiment, there are a total of 15 pressure pins 203 because the petal spring 10 has 5 arc edges, and each arc edge corresponds to three pressure pins 203. The three pressure pins 203 correspond to the two ends and the central area of ​​the arc edge, respectively. In this way, when pressed down, the petal spring 10 has a total of 15 force points, the force is more even, and it will not cause any area to warp upwards.

[0045] In other embodiments, each arc edge of the petal spring 10 corresponds to at least one pressure pin 203, and in the case of only one pressure pin 203, the pressure pin 203 corresponds to the central region of the arc of the petal spring 10.

[0046] See also Figure 4 Multiple bolt holes (not shown in the figure) are provided on the mounting plate 101, and these bolt holes are distributed around the periphery of the limiting rods 102. After several petal springs 10 are stacked and pressed together for positioning, a limiting plate 9 is placed on top of the limiting rods 102. The limiting plate 9 is fastened to the mounting plate 101 by long bolts 11 or screws. The long bolts 11 or screws are threadedly connected to the bolt holes on the mounting plate 101. The limiting plate 9 presses the stacked petal springs 10 together to prevent them from loosening or shifting, so that the petal springs 10 will not deform during annealing and will always maintain their original shape. This allows them to complete stress-relief annealing in a shaped and compressed state, eliminating deformation caused by the inherent characteristics of this type of spring and ensuring the flatness and dimensions of the spring.

[0047] See Figure 2 There is a material reduction hole 1011 in the middle area of ​​the mounting plate 101. The material reduction hole 1011 is for two purposes: first, to reduce weight and save materials; second, to facilitate the flame to penetrate into the inner circumference of the petal spring 10 through the material reduction hole 1011 during annealing.

[0048] A handle 103 is welded to each side of the mounting plate 101 to facilitate the removal and installation of the lower mold 1.

[0049] Initially, multiple petal springs 10 are stacked and placed into the limiting area of ​​the lower mold 1, and positioned by multiple limiting rods 102. Then, the lower mold 1 is mounted on the lower mold fixing plate 6 and slid down to directly below the pressing mechanism 2. Next, a switch (not shown in the figure) is activated, and the pressing cylinder 201 controls multiple pressing needles 203 to move downwards. The multiple pressing needles 203 simultaneously press down on different points of the petal springs 10. In this embodiment, there are 15 pressure points. After pressing, the pressing mechanism 2 returns to its original position. Then, the limiting plate 9 is manually mounted on the top of the limiting rods 102 to limit and fix the stacked petal springs 10, keeping them in a fixed and pressed state. For details, please refer to [reference needed]. Figure 5 Then, the lower mold 1 is disassembled for the next step of annealing.

[0050] The above technical solution only embodies the preferred technical solution of this utility model. Any changes that may be made by those skilled in the art to certain parts of it embody the principle of this utility model and fall within the protection scope of this utility model.

Claims

1. A hot-pressing and shaping device for a small-diameter petal spring, the petal spring (10) having an inner contour and an outer contour, characterized in that, The hot pressing and shaping device includes: The lower mold (1) is detachable. The lower mold (1) includes a mounting plate (101) and a plurality of limiting rods (102) vertically fixed on the mounting plate (101). The plurality of limiting rods (102) can be distributed along the outer contour and inner contour of the petal spring (10) respectively, so as to form a limiting area between the plurality of limiting rods (102) for limiting the plurality of superimposed petal springs (10). The pressing mechanism (2) includes multiple pressing needles (203) that can move up and down. The multiple pressing needles (203) are located directly above the limiting area and are distributed along the trajectory shape of the petal spring (10). There is at least one pressing needle (203) directly above the area traversed by each arc edge of the petal spring (10) in the limiting area.

2. The small-diameter petal spring hot-pressing and shaping device according to claim 1, characterized in that, Also includes: Base plate (3); The lower mold fixing plate (6) is slidably disposed on the base plate (3), and the mounting plate (101) is fixed to the lower mold fixing plate (6) by screws; Support plate (7), which is vertically fixed on base plate (3); The upper cover plate (8) is fixedly supported above the mounting lower mold (1) by a support plate (7), and the pressing mechanism (2) is mounted on the upper cover plate (8).

3. The small-diameter petal spring hot-pressing and shaping device according to claim 2, characterized in that, The base plate (3) is provided with a slide rail (4), and the lower mold fixing plate (6) is horizontally slidably connected to the slide rail (4) through a slider (5).

4. The small-diameter petal spring hot-pressing and shaping device according to claim 2, characterized in that, The pressing mechanism (2) further includes a pressing cylinder (201) and a pressure plate (202). The pressing cylinder (201) is vertically fixed to the bottom of the upper cover plate (8). The output end of the pressing cylinder (201) is connected to the pressure plate (202). Several pressing needles (203) are vertically fixed to the bottom of the pressure plate (202).

5. The small-diameter petal spring hot-pressing and shaping device according to claim 4, characterized in that, The mounting plate (101) and the pressure plate (202) have several mounting holes for mounting the limiting rod (102) and the pressure needle (203), respectively.

6. The small-diameter petal spring hot-pressing and shaping device according to claim 1, characterized in that, The mounting plate (101) has a material reduction hole (1011) in the middle.

7. The small-diameter petal spring hot-pressing and shaping device according to claim 1, characterized in that, The mounting plate (101) is provided with handles (103) on both sides.

8. The small-diameter petal spring hot-pressing and shaping device according to claim 1, characterized in that, Three pressure pins (203) are located directly above the area traversed by each arc edge of the petal spring (10) in the limiting region.

9. The hot-pressing and shaping device for small-diameter petal springs according to claim 1, characterized in that, The mounting plate (101) is located around a plurality of limit rods (102) and has a plurality of bolt holes.

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