Stamping apparatus for retaining rings

Abstract

The utility model discloses a kind of stamping equipment of baffle ring, including continuous stamping die, continuous stamping die is installed in stamping equipment, multiple equal step spacing arrangement processing stations are internally equipped, metal coil gradually drives along preset path and every transmission step is stamped once to complete corresponding process, continuous stamping die is further provided with the balance belt stamping station of balance belt stamping structure, this structure can be in the periphery of forming intermediate body and be punched out multiple thin and narrow and have the balance belt of elasticity, make forming intermediate body in dynamic keeping in metal coil preset intermediate position in continuous stamping, prevent material belt stress variation and cause deviation, finally get annular automobile accessory by forming station processing.Therefore can effectively solve the problem that forming intermediate body is easily deviated in existing continuous stamping, significantly improve the stamping precision and product qualification rate of annular automobile accessory, simultaneously realize multi-process continuous production, give consideration to production efficiency, adapt batch production demand.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts stamping production technology, specifically to a production device for continuous stamping of metal coils into annular automotive parts and preventing the intermediate parts from shifting during forming. Background Technology

[0002] In the automotive parts manufacturing industry, circular metal parts (such as sealing rings and support rings) are widely used. These parts are usually formed by continuous stamping of metal coils to balance production efficiency and dimensional accuracy. Currently, the mass production of these parts mostly adopts a continuous stamping die process, which uses a strip of material to carry the intermediate body through multiple stations for integrated forming.

[0003] However, as Figure 1 As shown, there are significant precision defects in the existing continuous stamping die production process: during the progressive transmission and stamping of the metal coil 1, the strip will experience local stress changes due to the stamping force at each station, resulting in slight stretching or deformation, causing the intermediate forming body 20 to deviate from the preset processing position. Especially after processes such as punching inner holes and pre-flanging, the stress structure of the connection area between the intermediate forming body and the strip has changed, and the stress impact of subsequent stamping processes is more likely to exacerbate the deviation problem of the intermediate forming body. Once the intermediate forming body deviates, the processing datum of subsequent key processes such as flanging will be deviated, resulting in out-of-tolerance inner and outer diameter dimensions of the finished parts, and even defects such as edge warping and uneven flanging, significantly reducing the product qualification rate. If a manual positioning step is added to correct the deviation, it will reduce production efficiency and increase labor costs, making it difficult to meet the high precision and high efficiency requirements of mass production.

[0004] In summary, existing stamping equipment for retaining rings cannot solve the problem of intermediate body displacement caused by changes in material strip stress, resulting in technical bottlenecks such as unstable accuracy and low yield. There is an urgent need for a continuous production device that can dynamically limit the intermediate body to improve stamping accuracy. Utility Model Content

[0005] In view of the above problems, this application provides a stamping device for retaining rings to solve the technical problem that the center offset affects the accuracy during continuous stamping of retaining rings.

[0006] To achieve the above objectives, this application provides a stamping apparatus for retaining rings, comprising:

[0007] A continuous stamping die is installed on a stamping equipment. The continuous stamping die has multiple processing stations arranged at equal intervals. The metal coil is gradually driven along a preset path in the continuous stamping die. Each step of the drive is stamped once by the stamping equipment to complete the corresponding processing procedure.

[0008] The processing station includes a balance belt stamping station located at the front. The balance belt stamping station is equipped with a balance belt stamping structure, which is used to stamp out multiple narrow balance belts on the outer periphery of the formed intermediate. The formed intermediate is connected to the metal coil through the balance belts. The balance belt has elastic deformation capability, which allows the formed intermediate to be dynamically maintained in the preset middle position of the metal coil during continuous stamping, preventing the formed intermediate from shifting due to changes in material stress. Finally, the circular automotive part is obtained after processing at the forming station.

[0009] Furthermore, the balance belt stamping structure includes a first stamping structure that punches arc-shaped grooves at the top and bottom of the forming intermediate, and a second stamping structure that punches Y-shaped grooves on both sides of the forming intermediate, wherein the balance belt is formed between the arc-shaped grooves and the Y-shaped grooves.

[0010] Furthermore, it also includes:

[0011] The servo feeder, connected to the coil feeding mechanism, is used to intermittently feed the metal coil to the continuous stamping die at a preset step distance. Each time the stamping press completes a stamping cycle, the servo feeder drives the metal coil to advance one step.

[0012] Furthermore, the number of the balancing belts is four, which are symmetrically distributed around the outer periphery of the molding intermediate to ensure that the molding intermediate is subjected to balanced forces.

[0013] Furthermore, the balancing belt has an arc-shaped structure to increase the elastic deformation of the balancing belt and enhance the dynamic limiting effect on the molding intermediate.

[0014] Furthermore, the balance belt stamping station is also used to punch two or more guide holes around the periphery of the forming intermediate, and the guide holes are used to guide and position the metal coil when it is driven in the continuous stamping die.

[0015] Furthermore, the metal coil is a special metal sheet for automotive parts, which is formed into a ring structure with uniform inner and outer diameters after being processed by a continuous stamping die.

[0016] Furthermore, the upper and lower dies of the continuous stamping die are equipped with matching stamping structures for each processing station to ensure the consistency of processing in each process.

[0017] Unlike existing technologies, the stamping equipment for the retaining ring in the above-mentioned technical solution includes a continuous stamping die. The continuous stamping die is installed in the stamping equipment and has multiple processing stations arranged with equal intervals. The metal coil is progressively driven along a preset path, and stamping is performed once for each step to complete the corresponding process. The continuous stamping die also has a balance belt stamping station with a balance belt stamping structure. This structure can stamp multiple narrow and elastic balance belts around the periphery of the formed intermediate body, dynamically maintaining the formed intermediate body in the preset center position of the metal coil during continuous stamping, preventing displacement caused by changes in strip stress. Finally, the ring-shaped automotive part is obtained after processing at the forming station. Therefore, it can effectively solve the problem of easy displacement of the formed intermediate body in existing continuous stamping processes, significantly improve the stamping accuracy and product qualification rate of ring-shaped automotive parts, and simultaneously achieve multi-process continuous production, balancing production efficiency and adapting to batch production needs.

[0018] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0019] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0020] In the accompanying drawings of the instruction manual:

[0021] Figure 1 This is a schematic diagram illustrating the state changes during the production process of the retaining ring in the background art;

[0022] Figure 2 This is a schematic diagram illustrating the state changes during the production process of the retaining ring as described in the specific implementation embodiment;

[0023] Figure 3 for Figure 1 Corresponding side view;

[0024] Figure 4 This is a schematic diagram of the structure of the balance belt described in a specific embodiment;

[0025] Figure 5 This is a schematic diagram of the continuous stamping die described in a specific embodiment;

[0026] Figure 6 This is a schematic diagram of the upper die of the continuous stamping die described in the specific embodiment;

[0027] Figure 7 This is a schematic diagram of the lower die of the continuous stamping die described in the specific embodiment;

[0028] The reference numerals used in the above figures are explained as follows:

[0029] 1. Metal coil; 11. Guide hole; 20. Forming intermediate; 201. Balancing belt; 202. Arc groove; 203. Y-shaped groove;

[0030] 30. Continuous stamping die; 31. Upper die; 32. Lower die; 313. First stamping structure; 311. Positioning pin; 312. Machining station; 310. Second stamping structure; 3100. Balance belt stamping station; 3120. Half-cutting station; 3121. Back pressure station; 3122. Flanging station; 3123. Part ejection station. Detailed Implementation

[0031] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0032] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0033] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0034] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0035] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0036] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0037] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0038] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0039] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0040] Please see Figures 2 to 7This embodiment provides a stamping apparatus for retaining rings. This apparatus is used to produce annular automotive metal parts such as retaining rings. The apparatus continuously stamps metal coils (hereinafter also referred to as strips) to form annular automotive metal parts. These annular automotive metal parts require multiple stamping processes, and the final forming requires external flanging, such as... Figure 1 As shown, existing stamping processes can cause the intermediate forming body to shift, resulting in parts exceeding dimensional accuracy standards. This embodiment employs a continuous stamping die for continuous stamping. Multiple processing stations are set within the continuous stamping die, with the last station being the outer flange. A balance belt stamping station is located at the front of the continuous stamping die, punching out multiple narrow balance belts around the outer periphery of the intermediate forming body 20. These balance belts possess elastic deformation capabilities, thereby counteracting stress changes in the intermediate forming body during the stamping process, thus preventing shifting of the intermediate forming body and improving processing accuracy.

[0041] The stamping equipment for this retaining ring includes a servo feeder, a continuous stamping die 30, and a stamping device. The servo feeder and the stamping device are conventional equipment in the art, and this embodiment does not modify them.

[0042] The continuous stamping die 30 has multiple processing stations 312 arranged at equal intervals. Each processing station 312 includes a front-mounted balance belt stamping station 3100. This station is equipped with a balance belt stamping structure, which punches out multiple narrow balance belts on the outer periphery of the formed intermediate. The formed intermediate is connected to the metal coil via these balance belts. Figure 4 As shown, the balancing belt 201 has elastic deformation capability, which allows the forming intermediate to be dynamically maintained at a preset central position in the metal coil during continuous stamping, preventing the forming intermediate from shifting due to changes in strip stress. Finally, it is processed at the forming station to obtain a ring-shaped automotive part. Preferably, there are four balancing belts 201, symmetrically distributed around the outer periphery of the forming intermediate to ensure balanced stress on the forming intermediate.

[0043] like Figure 6 and Figure 7 As shown, the balance belt stamping structure includes a first stamping structure 313 that punches arc-shaped grooves 202 at the top and bottom of the forming intermediate body, and a second stamping structure 310 that punches Y-shaped grooves 203 on both sides of the forming intermediate body, wherein the balance belt 201 is formed between the arc-shaped grooves 202 and the Y-shaped grooves 203.

[0044] The various parts of the stamping equipment for retaining rings work together to achieve continuous production:

[0045] The rotatable feeder for the metal coil to be processed is mounted on the coil feeding mechanism. The coil feeding mechanism uses a coil support to fix the metal coil (selected as 1.2mm thick automotive-grade cold-rolled steel sheet). Guide rollers smoothly convey the coil to the servo feeder. The servo feeder is sequentially connected to the coil feeding mechanism and the continuous stamping die. The feeding step distance (e.g., 0mm) is set via a programmable controller. After the stamping press completes one stamping cycle, the servo feeder precisely drives the material strip to feed one step, with the step distance error controlled within ±0.02mm. Figure 2 and Figure 3 The figures shown are a top view and a side view of the continuous stamping process of the metal coil (i.e., strip).

[0046] Continuous stamping dies are installed on the worktable of a punch press of a certain tonnage (e.g., 160 tons), such as... Figure 5 As shown, the continuous stamping die 30 includes an upper die 31 and a lower die 32, as follows: Figure 6 and Figure 7 As shown, the upper die is provided with multiple positioning pins 311, and the lower die is provided with positioning holes adapted to the positioning pins 311, allowing the upper die 31 and the lower die 32 to move relative to each other along the positioning holes and positioning pins. The upper and lower dies of the continuous stamping die are provided with multiple equal-pitch processing stations 312, sequentially along the material belt transmission direction: a balance belt stamping station 3100, a pre-forming station, an inner hole punching station, a 45° pre-flanging station, a secondary forming station, a half-cutting station 3120, a back-pressing station 3121, a flanging station 3122, and a part ejection station 3123. The upper and lower dies of the continuous stamping die are provided with matching stamping structures for each processing station to ensure consistency in each process. With each stamping operation of the continuous stamping die, the metal coil moves forward one step. For example... Figure 2 and Figure 3 As shown, the balance belt stamping station 3100 is used to punch guide holes 11 and balance belts 201 on both sides of the strip; the pre-forming station punches out Form 1 on the strip; the inner hole punching station is used to punch out the inner hole on the upper part of Form 1; the 45° pre-flanging station is used to punch out a 45° flanging on the inner side of the inner hole; the secondary forming station is used to punch out Form 2; the half-cutting station 3120 is used to cut off part of the formed intermediate body (i.e., the outside of the inner hole) to form a half-cut intermediate body; the back pressing station 3121 is used to press the half-cut intermediate body in the reverse direction (i.e., opposite to the half-cutting direction) so that part of it is pressed back into the metal coil to form a back-pressed body; the flanging forming station is used to perform outer flanging to form a flanged formed body; the part ejection station is used to punch the flanged formed body out of the metal coil to form a finished product.

[0047] In this embodiment, the core innovative structure is the balancing belt stamping station 3100. This station stamps multiple narrow and elastic balancing belts 201 around the outer periphery of the formed intermediate body 20, dynamically maintaining the formed intermediate body 20 at a preset central position on the metal coil during continuous stamping. This prevents displacement caused by changes in strip stress, ultimately resulting in a ring-shaped automotive part after processing at the forming station. This embodiment effectively solves the problem of easy displacement of the formed intermediate body in existing continuous stamping processes, significantly improving the stamping accuracy and product qualification rate of ring-shaped automotive parts. Simultaneously, it enables continuous multi-process production, balancing production efficiency and adapting to batch production needs.

[0048] The semi-cutting station 3120 is used to cut off the intermediate forming part in the metal coil, and the back-pressing station is used to press the intermediate forming part back into the metal coil, so that the intermediate forming part can be conveyed to the subsequent station with the metal coil, realizing continuous production that can still be fed after cutting. Finally, the ring-shaped automotive parts are processed by the forming station. The semi-cutting station 3120 includes a semi-cutting die edge adapted to the thickness of the metal coil. The semi-cutting die edge is arranged along the outer periphery of the intermediate forming part, and the depth of the cutting edge is less than the overall thickness of the metal coil. It can only partially cut off the connection area between the intermediate forming part and the metal coil, retaining the basic connecting section at the edge of the metal coil to maintain the conveying function of the metal coil. For example, the cutting edge depth of the semi-cutting station die is set to 1.0 mm (material strip thickness 1.2 mm) to achieve partial cutting; the back-pressing station is equipped with an arc-shaped pressing head adapted to the shape of the material strip at the cut point.

[0049] The working process of the stamping equipment for this retaining ring is as follows:

[0050] Before starting the equipment, the feeding step distance is set to 0mm via the servo feeder to ensure that the feed distance of the strip is consistent with the spacing between each station of the continuous stamping die. The coil feeding mechanism releases the metal coil, which is then conveyed to the initial station (balance belt stamping station) of the continuous stamping die via the servo feeder. The press performs its first stamping, and the balance belt stamping station punches guide holes and balance belts on the strip, ensuring accurate positioning and preventing deviation in subsequent stations. After the press completes one stamping, the servo feeder drives the strip to feed one step, and the strip enters the pre-forming station, where the stamping equipment pre-forms the part's basic shape. The strip continues to feed at the step distance, sequentially passing through the subsequent 45° pre-flanging station (performing a 45° pre-flanging of the part's edge to ensure subsequent flanging accuracy) and the secondary forming station (optimizing the part's basic structure and improving forming stability). The strip is fed to the semi-cutting station, where the stamping equipment punches it. The die edge at the semi-cutting station partially severs the part shape from the strip (leaving a 0.2mm connecting portion at the strip edge), preventing the connecting structure from interfering with subsequent flanging while not completely severing the strip's transfer function. The strip continues to be fed to the return pressing station, where the stamping equipment punches it again. The arc-shaped pressing head at the return pressing station reverses the edge of the semi-cut strip, cutting and pressing the formed intermediate body into the hole of the metal coil, ensuring balanced force and no jamming during subsequent feeding. The returned strip is fed to the flanging forming station, where the stamping equipment achieves the final flanging of the part, resulting in a circular automotive part that meets dimensional requirements. Finally, the strip is fed to the part exit station, where the stamping equipment completely separates the formed circular part from the strip. The part falls into the collection device, completing one continuous production cycle. Subsequent strips continue to be fed in increments, repeating the above processes to achieve continuous batch production.

[0051] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A stamping device for retaining rings, characterized in that, include: A continuous stamping die is installed on a stamping equipment. The continuous stamping die has multiple processing stations arranged at equal intervals. The metal coil is gradually driven along a preset path in the continuous stamping die. Each step of the drive is stamped once by the stamping equipment to complete the corresponding processing procedure. The processing station includes a balance belt stamping station located at the front. The balance belt stamping station is equipped with a balance belt stamping structure, which is used to stamp out multiple narrow balance belts on the outer periphery of the formed intermediate. The formed intermediate is connected to the metal coil through the balance belts. The balance belt has elastic deformation capability, which allows the formed intermediate to be dynamically maintained in the preset middle position of the metal coil during continuous stamping, preventing the formed intermediate from shifting due to changes in material stress. Finally, the circular automotive part is obtained after processing at the forming station.

2. The stamping equipment for the retaining ring according to claim 1, characterized in that, The balance belt stamping structure includes a first stamping structure that punches arc-shaped grooves at the top and bottom of the forming intermediate, and a second stamping structure that punches Y-shaped grooves on both sides of the forming intermediate, wherein the balance belt is formed between the arc-shaped grooves and the Y-shaped grooves.

3. The stamping equipment for the retaining ring according to claim 1, characterized in that, Also includes: The servo feeder, connected to the coil feeding mechanism, is used to intermittently feed the metal coil to the continuous stamping die at a preset step distance. Each time the stamping press completes a stamping cycle, the servo feeder drives the metal coil to advance one step.

4. The stamping equipment for the retaining ring according to claim 1, characterized in that, The number of balance belts is four, which are symmetrically distributed in a circle on the outer periphery of the molding intermediate to ensure that the molding intermediate is subjected to balanced forces.

5. The stamping equipment for the retaining ring according to claim 4, characterized in that, The balancing belt has an arc-shaped structure to increase the elastic deformation of the balancing belt and enhance the dynamic limiting effect on the molding intermediate.

6. The stamping equipment for the retaining ring according to claim 1, characterized in that, The balance belt stamping station is also used to punch two or more guide holes around the periphery of the forming intermediate body. The guide holes are used to guide and position the metal coil when it is being driven in the continuous stamping die.

7. The stamping equipment for the retaining ring according to claim 1, characterized in that, The metal coil is a special metal sheet for automotive parts, which is formed into a ring structure with uniform inner and outer diameters after being processed by a continuous stamping die.

8. The stamping equipment for the retaining ring according to claim 1, characterized in that, The upper and lower dies of the continuous stamping die are equipped with matching stamping structures for each processing station to ensure the consistency of processing in each process.

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