Precise stamping anti-overflow die with elastic sealing ring

Abstract

The invention discloses a precise stamping anti-overflow die with an elastic sealing ring. The precise stamping anti-overflow die comprises a base, and a connecting frame is fixedly mounted on the surface of the top of the base; an air cylinder is fixedly installed in the middle of the top surface of the connecting frame, an upper module is fixedly installed on the surface of the side, penetrating through the connecting frame, of the output end of the air cylinder, limiting rods are connected to the two sides of the upper module in a penetrating mode, the top surfaces of the limiting rods are fixedly connected with the connecting frame, and the bottom surfaces of the limiting rods are fixedly connected with the base. Mounting assemblies are symmetrically arranged on the two sides of the upper module; wherein the mounting assembly comprises a connecting box fixedly connected with the upper module; wherein the interior of the connecting box is in threaded connection with a screw rod, and by arranging the mounting assembly, compared with a bolt mode, the sealing ring can be mounted more conveniently, so that the downtime can be shortened to a certain extent, and the increase of time cost is reduced to a certain extent.

Description

Technical Field

[0001] The invention relates to the technical field of high-sealability stamping dies, in particular to a precision stamping anti-overflow die with an elastic sealing ring. Background Art

[0002] Stamping dies are widely used in industries such as machinery, automobiles, electronics, home appliances, construction, aerospace, etc. Their importance in metal processing and manufacturing cannot be ignored. In the manufacturing industry, especially the automotive and electronics industries, the automation of the stamping process can greatly improve production efficiency.

[0003] Publication No. CN221339224U discloses a highly sealed stamping die with anti-overflow properties. The anti-overflow port, diversion tube, and collection box cooperate to guide overflowing plastic material from the lower die, preventing it from overflowing and ensuring the molding quality of the workpiece preform. This saves material while keeping the area around the plastic tank clean. The cooperation between the bidirectional screw, positioning nut, and L-shaped connecting rod facilitates replacement of the upper die without disassembling a large number of parts, making replacement more convenient and improving the ease of use of the highly sealed stamping die. However, this patent still has the following problems in actual use: Through the cooperation between the anti-overflow port, the guide tube and the collection box, the overflowed plastic material inside the lower mold can be discharged to prevent material overflow to ensure the molding quality of the workpiece blank, save materials and keep the area around the plastic groove clean. Through the cooperation between the two-way screw rod, the positioning nut and the L-shaped connecting rod, the upper module can be easily replaced, so that the replacement of the upper module does not require the disassembly of a large number of parts, making the replacement more convenient and improving the ease of use of high-sealing stamping dies. However, the elastic sealing ring is prone to aging after long-term use, resulting in decreased elasticity and poor sealing performance, which in turn affects the anti-overflow effect. This requires the replacement of the elastic sealing ring. However, most of the current devices use bolts to fasten the installation of the elastic sealing ring, which makes it more inconvenient to replace the elastic sealing ring.

[0004] A precision stamping anti-overflow die with an elastic sealing ring is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a precision stamping anti-overflow mold with an elastic sealing ring to solve the problem proposed in the above background technology that the overflow plastic material inside the lower mold can be guided out through the cooperation between the anti-overflow port, the guide tube and the collection box to prevent the material from overflowing to ensure the molding quality of the workpiece blank, save materials and keep the area around the plastic groove clean. Through the cooperation between the two-way screw rod, the positioning nut and the L-shaped connecting rod, the upper module is easily replaced, so that the replacement of the upper module does not require the disassembly of a large number of parts, making the replacement more convenient and improving the ease of use of the high-sealing stamping mold. However, the elastic sealing ring is prone to aging after long-term use, resulting in a decrease in elasticity and poor sealing performance, which in turn affects the anti-overflow effect. This requires the replacement of the elastic sealing ring. However, most of the current devices fasten the elastic sealing ring by bolts, which leads to the problem of inconvenience in replacing the elastic sealing ring.

[0006] To achieve the above object, the present invention provides the following technical solution: a precision stamping anti-overflow die with an elastic sealing ring, comprising a base, a connecting frame being fixedly mounted on the top surface of the base; A cylinder is fixedly installed in the middle of the top surface of the connecting frame, and an upper module is fixedly installed on the output end of the cylinder through a side surface of the connecting frame. Limit rods are connected through both sides of the upper module, and the top surface of the limit rod is fixedly connected to the connecting frame, and the bottom surface of the limit rod is fixedly connected to the base; Also includes: Mounting components are symmetrically arranged on both sides of the upper module; Wherein, the mounting assembly includes a connection box fixedly connected to the upper module; Wherein, the internal thread of the connection box is connected with a screw rod.

[0007] Preferably, one side surface of the screw is rotatably connected to a bearing seat, the side surface of the bearing seat away from the screw is fixedly connected to a slide, and the middle of the side surface of the slide away from the bearing seat is fixedly connected to a fixing rod.

[0008] Preferably, sliders are symmetrically installed on both sides of the skateboard.

[0009] Preferably, the connection box is symmetrically provided with sliding grooves, and the sliding grooves are slidably connected to the sliders.

[0010] Preferably, a damping spring is sleeved on the surface of the limiting rod, the top surface of the damping spring is fixedly connected to the upper module, the bottom surface of the damping spring is fixedly connected to the base, and the lower module is fixedly installed in the middle of the top surface of the base.

[0011] Preferably, the damping spring is made of alloy spring steel.

[0012] Preferably, a sealing ring is snap-fitted around the four sides of the upper module, and fixing grooves are symmetrically provided on both sides of the surface of the sealing ring, and the fixing grooves are snap-fitted with the fixing rods.

[0013] Preferably, the end of the fixing rod and the fixing groove adopt a magnetic snap-fit ​​structure: a neodymium iron boron permanent magnet is embedded in the end of the fixing rod, a soft iron magnetic sheet is correspondingly provided at the bottom of the fixing groove, and an annular silicone buffer ring is provided on the outer periphery of the fixing rod to form an interference fit with the notch of the fixing groove.

[0014] Preferably, a fluid static pressure guide structure is adopted between the slider and the slide groove, a cross-shaped oil groove is opened on the top surface of the slider, a micro oil pump is arranged inside the connecting box, an oil film with a thickness of 10 μm is formed between the slider and the slide groove, and an oil return hole is opened on the bottom surface of the slide groove, which is connected to the oil storage cavity at the bottom of the connecting box.

[0015] Preferably, the connection between the screw and the bearing seat adopts a planetary gear transmission structure: an external gear with a module of 1.5 is processed on the outer periphery of the screw, and three evenly distributed planetary gears are arranged on the inner side of the bearing seat, which mesh with the inner gear ring fixed on the inner wall of the connecting box.

[0016] Preferably, the damping spring adopts a memory alloy composite structure: the spring body is nickel-titanium alloy wire, and the outer layer is wound with alloy spring steel wire, and the two are fixed by spot welding.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the precision stamping anti-overflow die with an elastic sealing ring is provided with an installation assembly, which makes it more convenient to install the sealing ring in a manner comparable to bolts, thereby reducing downtime and thus reducing the increase in time costs to a certain extent. The specific contents are as follows: 1. By setting up an installation assembly, when replacing a sealing ring that has been used for a long time, by rotating the screw rod, the screw rod and the connecting box are connected by a rotating thread, which allows the screw rod to move when it rotates, and at the same time, the screw rod and the bearing seat are rotatably connected, so that when the screw rod rotates, it will not drive the rotation of the bearing seat, but when the screw rod moves, it can drive the movement of the bearing seat, and the bearing seat is driven by the screw rod to move, so that the slide plate and the fixing rod can be driven to move, so that the fixing plate is separated from the fixing groove, so that the staff can remove the sealing ring for replacement by pulling the sealing ring. At the same time, when installing the sealing ring, the sealing ring is inserted into the card slot opened in the upper module, and then the screw rod is rotated again, so that the screw rod drives the movement of the bearing seat, the slide plate and the fixing rod in turn, so that the fixing rod and the fixing groove are engaged together, thereby completing the installation of the sealing ring, thereby reducing downtime, thereby reducing the increase in time cost to a certain extent; 2. By setting the limit rod and the damping spring, the upper module plays a role in positioning and guiding, buffering and shock absorption, and stabilizing the stamping process when stamping the groove opened by the lower module, thereby ensuring that the upper module moves vertically up and down in a specific direction during the stamping process to avoid offset or shaking. The damping spring has a buffering effect. When the stamping stroke ends and the upper module contacts the workpiece or the lower module, the damping spring will be compressed, absorbing and consuming the impact force generated during the stamping process, reducing the collision between the mold components, thereby protecting the mold itself and extending the service life of the mold. It can also reduce the noise during equipment operation. At the same time, during the stamping process, the damping spring can provide a certain resistance to make the movement of the upper module more stable. It can suppress the instantaneous acceleration or deceleration of the upper module due to changes in stamping pressure, avoid excessive fluctuations in movement speed, and help improve the stability and consistency of the stamping process, thereby improving the stability of product quality. At the same time, the damping spring is made of alloy spring steel, which makes it possible to select a damping spring with appropriate stiffness and elasticity according to actual conditions, thereby extending the service life of the damping spring when it undergoes frequent deformation for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the connection structure between the upper module and the sealing ring in the present invention; Figure 3 This is a schematic diagram of the overall cross-sectional structure of the installation assembly in the present invention; Figure 4 Schematic diagram of the sealing ring structure of the present invention; Figure 5 It is a schematic diagram of the overall exploded structure of the installation assembly in the present invention.

[0019] In the figure: 1. Base; 2. Connecting frame; 3. Cylinder; 4. Upper module; 5. Limit rod; 6. Damping spring; 7. Lower module; 8. Sealing ring; 9. Mounting assembly; 901. Connecting box; 902. Screw; 903. Bearing seat; 904. Slide plate; 905. Fixing rod; 906. Slider; 907. Slide groove; 10. Fixing groove. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] See also Figure 1-5The present invention provides a technical solution: a precision stamping anti-overflow mold with an elastic sealing ring 8, comprising a base 1, a connecting frame 2 is fixedly installed on the top surface of the base 1; a cylinder 3 is fixedly installed in the middle of the top surface of the connecting frame 2, and the output end of the cylinder 3 is fixedly installed with an upper module 4 through one side surface of the connecting frame 2, and the two sides of the upper module 4 are connected through the limiting rod 5, the top surface of the limiting rod 5 is fixedly connected to the connecting frame 2, and the bottom surface of the limiting rod 5 is fixedly connected to the base 1; it also includes: mounting components 9 are symmetrically arranged on both sides of the upper module 4; wherein the mounting component 9 includes a connecting box 901 fixedly connected to the upper module 4; wherein the internal thread of the connecting box 901 is connected to a screw 902, such as Figure 1-5 As shown, by setting up the installation component 9, the sealing ring 8 can be installed more conveniently than by bolts, thereby reducing downtime and reducing the increase in time cost to a certain extent. At the same time, the cylinder 3 and the control end are electrically connected.

[0022] One side surface of the screw 902 is rotatably connected to a bearing seat 903, and the side surface of the bearing seat 903 away from the screw 902 is fixedly connected to a slide 904. The middle surface of the side surface of the slide 904 away from the bearing seat 903 is fixedly connected to a fixed rod 905. Slide blocks 906 are symmetrically installed on both sides of the slide 904. Slide grooves 907 are symmetrically opened inside the connection box 901. The slide grooves 907 are slidably connected to the slide blocks 906. Figure 3 、 5 As shown, when replacing the sealing ring 8 that has been used for a long time, by rotating the screw 902, the screw 902 and the connecting box 901 are connected by a rotating thread, which allows the screw 902 to move when it rotates. At the same time, the screw 902 and the bearing seat 903 are connected by a rotating thread, so that when the screw 902 rotates, it will not drive the rotation of the bearing seat 903, but when the screw 902 moves, it can drive the movement of the bearing seat 903. The bearing seat 903 is driven to move by the screw 902, which can drive the slide plate 904 and the fixed rod 905 to move, thereby separating the fixed plate from the fixed groove 10, so that the staff can remove the sealing ring 8 for replacement by pulling the sealing ring 8.

[0023] The surface of the limit rod 5 is sleeved with a damping spring 6, the top surface of the damping spring 6 is fixedly connected to the upper module 4, the bottom surface of the damping spring 6 is fixedly connected to the base 1, and the lower module 7 is fixedly installed in the middle of the top surface of the base 1. The damping spring 6 is made of alloy spring steel, such as Figure 1As shown, by setting the limit rod 5 and the damping spring 6, the upper module 4 plays a role in positioning guidance, buffering and shock absorption, and stabilizing the stamping process when stamping the groove opened by the lower module 7, thereby ensuring that the upper module 4 moves vertically up and down in a specific direction during the stamping process to avoid offset or shaking. The damping spring 6 has a buffering effect. When the stamping stroke ends and the upper module 4 contacts the workpiece or the lower module 7, the damping spring 6 will be compressed to absorb and consume the impact force generated during the stamping process, reduce the collision between the mold components, thereby protecting the mold itself, extending the service life of the mold, and also reducing the noise during the operation of the equipment. At the same time, during the stamping process, the damping spring 6 can provide a certain resistance to make the movement of the upper module 4 smoother. It can suppress the instantaneous acceleration or deceleration of the upper module 4 caused by changes in stamping pressure, avoid excessive fluctuations in movement speed, help improve the stability and consistency of the stamping process, and thus improve the stability of product quality. At the same time, the damping spring 6 is made of alloy spring steel, which makes it possible to select a damping spring 6 with appropriate stiffness and elasticity according to actual conditions, thereby extending the service life of the damping spring 6 when it is frequently deformed for a long time.

[0024] The upper module 4 is connected with a sealing ring 8 on all sides. The surface of the sealing ring 8 is symmetrically provided with fixing grooves 10 on both sides. The fixing grooves 10 are connected with the fixing rods 905 by snapping. Figure 2-5 As shown, when installing the sealing ring 8, the sealing ring 8 is inserted into the slot opened in the upper module 4, and then the screw 902 is rotated again, so that the screw 902 drives the movement of the bearing seat 903, the slide 904 and the fixing rod 905 in turn, so that the fixing rod 905 is engaged with the fixing groove 10, thereby completing the installation of the sealing ring 8, thereby reducing downtime and reducing the increase in time cost to a certain extent.

[0025] In the present invention, the end of the fixing rod 905 and the fixing slot 10 adopt a magnetic engagement structure: a neodymium iron boron permanent magnet (grade N35, 5mm x 3mm) is embedded in the end of the fixing rod 905. A soft iron magnetic plate (2mm thick) is positioned at the bottom of the fixing slot 10, with a magnetic attraction force designed to be 5-8N. This ensures the positioning stability of the sealing ring 8 during installation and facilitates the removal of the sealing ring 8 by overcoming the magnetic force. An annular silicone buffer ring with a hardness of 50 Shore A is installed on the outer periphery of the fixing rod 905, forming an interference fit with the notch of the fixing slot 10, with an interference of 0.3-0.5mm, eliminating any gaps and enhancing the sealing effect.

[0026] In this invention, a hydrostatic guide structure is employed between the slider 906 and the chute 907: a cross-shaped oil groove with a depth of 0.5 mm and a width of 1 mm is defined on the top surface of the slider 906. A micro-pump with a displacement of 0.1 mL / min is installed inside the connection box 901, supplying 32 cSt hydraulic oil to the oil groove through an oil circuit. This forms a 10 μm thick oil film between the slider 906 and the chute 907, converting sliding friction into liquid friction and reducing the friction coefficient to below 0.005. A return oil hole with a diameter of 0.8 mm is defined on the bottom surface of the chute 907 and connects to the oil reservoir at the bottom of the connection box 901, forming a closed circulation system that prevents oil contamination of the mold working area.

[0027] In this invention, the connection between screw 902 and bearing seat 903 utilizes a planetary gear transmission structure: a 1.5 module external gear is machined onto the outer periphery of screw 902, and three evenly distributed planetary gears with 18 teeth are positioned inside bearing seat 903. These gears mesh with a 60-tooth internal gear ring fixed to the inner wall of connection box 901. When screw 902 is rotated, the planetary gears both orbit around its axis and rotate on their own axis, converting the rotational motion of screw 902 into linear motion of bearing seat 903. With a transmission ratio of 3.33:1, bearing seat 903 moves 1mm for every three revolutions of screw 902, achieving precise micro-displacement control and a positioning accuracy of ±0.02mm.

[0028] In this invention, the damping spring 6 utilizes a memory alloy composite structure: the main spring body is made of nickel-titanium alloy wire, wrapped with an outer layer of alloy spring steel wire, secured by spot welding. The nickel-titanium alloy provides superelasticity, while the alloy spring steel provides stiffness support. This composite structure ensures that the spring exhibits a spring elasticity loss of ≤5% after 100,000 compression cycles. Temperature compensation plates are installed on the flanges at each end of the spring. When the operating temperature exceeds 60°C, the thermal expansion of the copper plates pushes the flanges axially by 0.1-0.2mm, automatically compensating for the thermal expansion and contraction of the nickel-titanium alloy and maintaining a stable spring stiffness.

[0029] Working principle: Before using this precision stamping anti-overflow mold with elastic sealing ring 8, you need to check the overall condition of the device to make sure it can work normally. Figure 1 - Figure 5As shown, first, by setting the installation component 9, when replacing the sealing ring 8 that has been used for a long time, by rotating the screw 902, the screw 902 and the connecting box 901 are connected by a rotating thread, which makes the screw 902 move when it rotates. At the same time, the screw 902 and the bearing seat 903 are connected by a rotating connection, so that when the screw 902 rotates, it will not drive the rotation of the bearing seat 903, but when the screw 902 moves, it can drive the movement of the bearing seat 903. The bearing seat 903 is driven to move by the screw 902, so that the slide plate 904 and the fixed rod 905 can be driven. Move, thereby separating the fixing plate from the fixing groove 10, so that the staff can remove the sealing ring 8 for replacement by pulling the sealing ring 8. At the same time, when installing the sealing ring 8, the sealing ring 8 is inserted into the slot opened in the upper module 4, and then the screw 902 is rotated again, so that the screw 902 drives the movement of the bearing seat 903, the slide plate 904 and the fixing rod 905 in turn, so that the fixing rod 905 is engaged with the fixing groove 10, thereby completing the installation of the sealing ring 8, thereby reducing downtime and reducing the increase in time cost to a certain extent.

[0030] Secondly, by setting the limit rod 5 and the damping spring 6, the upper module 4 plays a role in positioning guidance, buffering and shock absorption, and stabilizing the stamping process when stamping the groove opened by the lower module 7, thereby ensuring that the upper module 4 moves vertically up and down in a specific direction during the stamping process to avoid offset or shaking. The damping spring 6 has a buffering effect. When the stamping stroke ends and the upper module 4 contacts the workpiece or the lower module 7, the damping spring 6 will be compressed, absorbing and consuming the impact force generated during the stamping process, reducing the collision between the mold components, thereby protecting the mold itself and extending the service life of the mold. At the same time, it can also reduce the noise during the operation of the equipment. At the same time, during the stamping process, the damping spring 6 can provide a certain resistance to make the movement of the upper module 4 more stable. It can suppress the instantaneous acceleration or deceleration of the upper module 4 due to changes in the stamping pressure, avoid excessive fluctuations in the movement speed, and help to improve the stability and consistency of the stamping process, thereby improving the stability of the product quality. At the same time, the damping spring 6 is made of alloy spring steel, which makes it possible to select a damping spring 6 with appropriate stiffness and elasticity according to actual conditions, thereby extending the service life of the damping spring 6 when it is frequently deformed for a long time.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A precision stamping anti-overflow die with an elastic sealing ring, comprising a base (1), a connecting frame (2) being fixedly mounted on the top surface of the base (1); A cylinder (3) is fixedly mounted in the middle of the top surface of the connecting frame (2), an upper module (4) is fixedly mounted on the output end of the cylinder (3) through a side surface of the connecting frame (2), and limiting rods (5) are connected through both sides of the upper module (4), the top surface of the limiting rod (5) is fixedly connected to the connecting frame (2), and the bottom surface of the limiting rod (5) is fixedly connected to the base (1); It is characterized by: Also includes: Mounting components (9) are symmetrically provided on both sides of the upper module (4); Wherein, the installation assembly (9) includes a connection box (901) fixedly connected to the upper module (4); The internal thread of the connection box (901) is connected to a screw rod (902).

2. The precision stamping anti-overflow die with an elastic sealing ring according to claim 1, characterized in that: A bearing seat (903) is rotatably connected to one side surface of the screw rod (902), a slide plate (904) is fixedly connected to one side surface of the bearing seat (903) away from the screw rod (902), and a fixing rod (905) is fixedly connected to the middle of one side surface of the slide plate (904) away from the bearing seat (903).

3. The precision stamping anti-overflow die with an elastic sealing ring according to claim 2, characterized in that: Slide blocks (906) are symmetrically mounted on both sides of the slide plate (904).

4. The precision stamping anti-overflow die with an elastic sealing ring according to claim 1, characterized in that: The connection box (901) is symmetrically provided with sliding grooves (907) inside, and the sliding grooves (907) are slidably connected to the slider (906).

5. The precision stamping anti-overflow die with an elastic sealing ring according to claim 1, characterized in that: The surface of the limiting rod (5) is sleeved with a damping spring (6), the top surface of the damping spring (6) is fixedly connected to the upper module (4), the bottom surface of the damping spring (6) is fixedly connected to the base (1), and a lower module (7) is fixedly installed in the middle of the top surface of the base (1), and the damping spring (6) is made of alloy spring steel.

6. The precision stamping anti-overflow die with an elastic sealing ring according to claim 1, characterized in that: The upper module (4) is snap-fitted with a sealing ring (8) on all sides, and a fixing groove (10) is symmetrically provided on both sides of the surface of the sealing ring (8), and the fixing groove (10) is snap-fitted with a fixing rod (905).

7. The precision stamping anti-overflow die with an elastic sealing ring according to claim 6, characterized in that: The end of the fixing rod (905) and the fixing groove (10) adopt a magnetic engagement structure: a neodymium iron boron permanent magnet is embedded in the end of the fixing rod (905), a soft iron magnetic attraction piece is correspondingly provided at the bottom of the fixing groove (10), and an annular silicone buffer ring is provided on the outer periphery of the fixing rod (905) to form an interference fit with the notch of the fixing groove (10).

8. The precision stamping anti-overflow die with an elastic sealing ring according to claim 7, characterized in that: A fluid static pressure guide structure is adopted between the slider (906) and the slide groove (907). A cross-shaped oil groove is provided on the top surface of the slider (906). A micro oil pump is provided inside the connection box (901) to form an oil film with a thickness of 10 μm between the slider (906) and the slide groove (907). An oil return hole is provided on the bottom surface of the slide groove (907) and is connected to the oil storage cavity at the bottom of the connection box (901).

9. The precision stamping anti-overflow die with an elastic sealing ring according to claim 2, characterized in that: The connection between the screw (902) and the bearing seat (903) adopts a planetary gear transmission structure: an external gear with a module of 1.5 is machined on the outer periphery of the screw (902), and three evenly distributed planetary gears are arranged on the inner side of the bearing seat (903) and mesh with an internal gear ring fixed to the inner wall of the connection box (901).

10. The precision stamping anti-overflow die with an elastic sealing ring according to claim 5, characterized in that: The damping spring (6) adopts a memory alloy composite structure: the spring body is nickel-titanium alloy wire, and the outer layer is wound with alloy spring steel wire, and the two are fixed by spot welding.

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