Multi-station nut cold heading forming device

Abstract

The utility model discloses a multi -station nut cold heading forming device belongs to nut cold heading equipment field, including support, base, hydraulic device, cold heading seat, guide block, bearing plate, positioning structure, mould, cleaning structure. The utility model processes the blank in one mould while in cold heading seat, and the operator can safely carry out feeding and discharging in other moulds, when mould switching, the movement of bearing plate can drive cleaning structure to remove the debris on the surface of mould cavity. The device idle waiting time is greatly reduced, and the production efficiency is remarkably improved, meanwhile, the safety risk of personnel operation in the high -pressure processing area is avoided, and the function of automatic cleaning guarantees the product surface quality and mould service life.

Description

Technical Field

[0001] This utility model relates to the field of nut cold heading equipment, and in particular to a multi-station nut cold heading forming device. Background Technology

[0002] Cold heading is a new type of chipless metal pressure processing technology. It is a processing method that utilizes the plastic deformation of metal under external force and uses a mold to redistribute and transfer the metal volume to form the required parts or blanks. Cold heading is most suitable for producing standard fasteners such as bolts, screws, nuts, rivets, and pins.

[0003] During the cold heading process, oxide scale, microscopic defects, or tiny metal particles generated during intense shear deformation on the billet surface detach as debris. Without an effective cleaning mechanism, these hard debris remain and adhere to the mold cavity surface or mating gaps. When the next workpiece is fed into the mold for forming, these residual debris, like tiny abrasive grains, leave scratches, indentations, and other defects on the smooth surface of the workpiece, severely affecting the product's appearance quality and dimensional accuracy. They may even become the source of workpiece failure due to stress concentration. More seriously, during the closing process between the cold heading station and the mold, these debris cause corrosive wear on the precise mating surfaces, scratching the mold cavity, altering its critical geometry, and resulting in a series of quality problems such as flash, burrs, and dimensional deviations in the formed product, ultimately forcing the mold to be scrapped prematurely. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background art by designing a multi-station nut cold forging device.

[0005] The technical solution of this utility model to achieve the above objectives is a multi-station nut cold heading forming device, including a bracket, a base, a hydraulic device, a cold heading seat, a guide block, a bearing plate, a positioning structure, a mold, and a cleaning structure, wherein the bracket is installed above the base; The hydraulic device is installed above the bracket and its output end extends out of the bracket and is fixedly connected to the cold heading seat, and is used to drive the cold heading seat to impact the mold; The guide block is installed above the base, and the bearing plate is slidably connected to the guide block; The positioning structure is mounted on the support plate and is used to lock the position of the support plate on the guide block; The mold has at least two parts and is detachably mounted on the support plate; The cleaning structure, mounted on the base, is used to clean debris from the surface of the mold.

[0006] Preferably, the positioning structure includes a positioning plate, a groove, a rotating shaft, a reset groove, an insert block, and a reset spring. The positioning plate is fixedly installed on the base. There are two positioning plates, located on opposite sides of the support plate. The positioning plate has a groove on the side facing the support plate. The rotating shaft is rotatably installed on the support plate and extends out of the support plate at its end. The rotating shaft has reset grooves, the number of which is the same as the number of molds. The insert block is slidably installed inside the support plate, and its number and position correspond to the reset grooves. The reset spring is located inside the support plate and is fitted onto the insert block. One end of the reset spring is fixedly installed on the insert block, and the other end is fixedly installed on the support plate.

[0007] Preferably, the cleaning structure includes a connecting shaft, a rack, a gear, a cleaning head, and a cover plate. The connecting shaft is rotatably mounted on the base, and the number of connecting shafts is the same as the number of molds. The rack is fixedly mounted on both sides of the bearing plate. The gear is fixedly mounted on the connecting shaft, and the gear meshes with the rack. The cleaning head is inserted into the connecting shaft, and the cover plate is screwed onto the top of the connecting shaft.

[0008] Preferably, the base is provided with support legs, which are located below the base and fixedly installed at the four corners of the base.

[0009] Preferably, the mold is mounted on the support plate by bolts.

[0010] Preferably, the rotating shaft is provided with an anti-slip cap, which is fixedly installed at the end of the rotating shaft.

[0011] In summary, this utility model provides a multi-station nut cold heading forming device with the following advantages: Through its structural design, this device utilizes a hydraulic system to drive the cold heading seat to continuously impact the blank within the mold, completing the blank processing. There are at least two molds on the support plate. After the blank in one mold is processed, the support plate is moved, aligning the other molds with the cold heading seat for further processing. This reduces the interval time between loading and unloading, improves the working efficiency of the cold heading seat, and eliminates the need to remove the part from the mold and replace it with a new blank after each individual part is processed. It also avoids the safety hazards caused by hydraulic system malfunctions during manual part replacement. When a blank is processed, the support plate is unlocked using a positioning structure, allowing it to slide along the guide block. During the movement of the support plate, a cleaning structure is activated to remove debris from the mold cavity surface. Compared to existing technologies, this invention allows operators to safely load and unload materials in other molds while the blank in one mold is being processed by the cold heading stand. During mold switching, the movement of the support plate automatically drives the cleaning structure to remove debris from the mold cavity surface. This significantly reduces equipment idle time and greatly improves production efficiency. It also avoids the safety risks of personnel operating in high-pressure processing areas. The automatic cleaning function ensures product surface quality and mold lifespan. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a multi-station nut cold heading forming device according to the present invention; Figure 2 This is a front structural schematic diagram of a multi-station nut cold heading forming device according to the present invention; Figure 3 This is a side view of the multi-station nut cold heading forming device described in this utility model; Figure 4 This is a cross-sectional view of the positioning structure described in this utility model; In the diagram, 1. Bracket; 2. Base; 3. Hydraulic device; 4. Cold heading seat; 5. Guide block; 6. Bearing plate; 7. Positioning structure; 8. Mold; 9. Cleaning structure; 10. Support leg; 11. Anti-slip cap; 71. Positioning plate; 72. Groove; 73. Rotating shaft; 74. Reset groove; 75. Insert block; 76. Reset spring; 91. Connecting shaft; 92. Rack; 93. Gear; 94. Cleaning head; 95. Cover plate. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] In the description of this utility model, it should be noted that the terms "upper / lower end," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "set / set up," "sleeve," "connection," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] Please see Figure 1-4 This utility model provides a technical solution: a multi-station nut cold heading forming device, including a bracket 1, a base 2, a hydraulic device 3, a cold heading seat 4, a guide block 5, a bearing plate 6, a positioning structure 7, a mold 8, and a cleaning structure 9, wherein the bracket 1 is fixedly installed above the base 2; The hydraulic device 3 is fixedly installed above the bracket 1 and its output end extends out of the bracket 1 and is fixedly connected to the cold heading seat 4, and is used to drive the cold heading seat 4 to impact the mold 8; The guide block 5 is fixedly installed above the base 2, and the bearing plate 6 is slidably connected to the guide block 5; The positioning structure 7 is installed on the support plate 6 and is used to lock the position of the support plate 6 on the guide block 5. The mold 8 has at least two parts and is detachably mounted on the support plate 6; The cleaning structure 9 is installed on the base 2 and is used to clean debris from the surface of the mold 8.

[0017] In this invention, the positioning structure 7 includes a positioning plate 71, a groove 72, a rotating shaft 73, a reset groove 74, an insert block 75, and a reset spring 76. The positioning plate 71 is fixedly mounted on the base 2. There are two positioning plates 71, located on opposite sides of the support plate 6. The positioning plate 71 has a groove 72 on the side facing the support plate 6. The rotating shaft 73 is rotatably mounted on the support plate 6, with its end extending beyond the support plate 6. The rotating shaft 73 has reset grooves 74, the number of which matches the number of molds 8. The insert blocks 75 are slidably mounted within the support plate 6, their number and position corresponding to the reset grooves 74. The reset spring 76 is located within the support plate 6 and fitted onto the insert blocks 75. One end of the reset spring 76 is fixedly mounted on the insert block 75, and the other end is fixedly mounted on the support plate 6. Rotating the rotating shaft 73 in the positioning structure 7 causes the reset grooves 74 on the rotating shaft 73 to rotate. When the reset groove 74 rotates to align with the insert 75, the reset spring 76 will cause the insert 75 to slide into the reset groove 74 from one end of the support plate 6, while the other end of the insert 75 is pulled out from the groove 72 on the positioning plate 71. When both inserts 75 on both sides of the support plate 6 are pulled out from the groove 72 on the positioning plate 71, the operator can move the support plate 6 to the position on the base 2 and align the other mold 8 with the position of the cold heading seat 4. During the movement of the support plate 6, the cleaning structure 9 will clean the debris from the surface of the mold cavity 8. After the support plate 6 is moved to the designated position, the operator will rotate the screw shaft in the opposite direction to reset the screw shaft. At this time, the inclined surface of the reset groove 74 will push the insert 75 to move outward from the support plate 6 until it is inserted into the groove 72 on the positioning plate 71. The operator can then stop rotating the screw shaft to complete the positioning of the support plate 6 and prevent the support plate 6 from moving during the cold forging of the blank.

[0018] In this invention, the cleaning structure 9 includes a connecting shaft 91, a rack 92, a gear 93, a cleaning head 94, and a cover plate 95. The connecting shaft 91 is rotatably mounted on the base 2, and the number of connecting shafts 91 is the same as the number of molds 8. The racks 92 are respectively fixedly mounted on both sides of the support plate 6. The gears 93 are fixedly mounted on the connecting shaft 91, and the gears 93 mesh with the racks 92. The cleaning head 94 is inserted into the connecting shaft 91, and the cover plate 95 is screwed onto the top of the connecting shaft 91. During the movement of the support plate 6, the rack 92 will move along with the support plate 6. The movement of the rack 92 will cause the gear 93 to rotate around the connecting shaft 91. The rotation of the gear 93 will cause the connecting shaft 91 to move, and the movement of the connecting shaft 91 will cause the cleaning head 94 to rotate 180°, cleaning the debris from the surface of the mold 8 that has just been processed. When the cleaning head 94 needs to be replaced, simply rotate the cover plate 95 screwed to the top of the connecting shaft 91 to remove it, and the cleaning head 94 inserted into the connecting shaft 91 can be pulled out and replaced.

[0019] In this invention, a support leg 10 is provided below the base 2. The support leg 10 is located below the base 2 and fixedly installed at the four corners of the base 2. The four support legs 10 below the base 2 can support the base 2. At the same time, the bottom of the support leg 10 is equipped with an anti-slip pad to prevent the invention from sliding due to vibration during operation, making the invention work more stably.

[0020] In this invention, the mold 8 is bolted to the support plate 6. When the mold 8 needs to be replaced according to the required size of the nut for cold forging, it can be disassembled and replaced more conveniently and quickly.

[0021] In this invention, an anti-slip cap 11 is provided on the rotating shaft 73, and the anti-slip cap 11 is fixedly installed at the end of the rotating shaft 73. The anti-slip cap 11 at the end of the rotating shaft can increase the friction between the operator and the rotating shaft, preventing the operator's hand from slipping.

[0022] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires, and should select appropriate controllers according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical connections between the various electrical components are completed in sequence. The detailed connection methods are well-known technologies in the field. The following mainly introduces the working principle and process, and will not describe the electrical control further.

[0023] In this embodiment: when processing the blank inside the mold 8, the hydraulic device 3 located on the support 1 is activated. The hydraulic device 3 drives the cold heading seat 4 to continuously impact the blank inside the mold 8, thereby completing the processing of the blank. The four support legs 10 under the base 2 can support the base 2, and the bottom of the support legs 10 is equipped with anti-slip pads to prevent the present invention from sliding due to vibration during operation, making the present invention work more stably.

[0024] When there are two molds 8 on the support plate 6, the workflow is as follows: The blank in mold 8 at position one is processed, and at this time, the blank in mold 8 at position two can be placed. After the blank in mold 8 at position one is processed, the support plate 6 is moved to align mold 8 at position two with the cold heading stand 4. At this time, mold 8 at position one is moved away from the cold heading stand 4, allowing for safer removal of the processed part and placement of the blank to be processed into mold 8 at position one. After the blank in mold 8 at position two is processed, the support plate 6 is moved again to remove mold 8 at position two from the cold heading stand 4, and mold 8 at position one is moved back under the cold heading stand 4 for processing of the blank in mold 8 at position one. Repeating the above process allows for safe and quick placement of blanks and removal of processed parts, reducing working time and improving the working efficiency of the cold heading stand 4. It eliminates the need to remove the part from the mold 8 and replace it with a new blank after each processing of a single part. This avoids the safety hazards caused by the malfunction of hydraulic device 3 when manually replacing parts.

[0025] The mold 8 is detachably mounted on the support plate 6 by bolts or clips. In this utility model, bolts are preferred. When the mold 8 needs to be replaced according to the required size of the nut for cold forging, the mold 8 can be disassembled and replaced more conveniently and quickly.

[0026] During the processing of the blank, extremely small metal particles are generated. These metal particles fall off in the form of debris and remain on the surface of the cavity of the mold 8. When a blank is processed in the mold 8 at the current position, the operator uses the positioning structure 7 to unlock the support plate 6, so that the support plate 6 can slide along the direction of the guide block 5 on the guide block 5 above the base 2.

[0027] The rotating shaft 73 in the positioning structure 7 rotates the reset groove 74 on the rotating shaft 73. The anti-slip cap 11 at the end of the rotating shaft increases the friction between the operator and the rotating shaft, preventing the operator from slipping. When the reset groove 74 rotates to align with the insert 75, the reset spring 76 drives the insert 75 to slide into the reset groove 74 from one end of the support plate 6, while the other end of the insert 75 is pulled out from the groove 72 on the positioning plate 71. When the inserts 75 on both sides of the support plate 6 are pulled out from the groove 72 on the positioning plate 71, the operator can move the position of the support plate 6 on the base 2 and align the other mold 8 with the position of the cold heading seat 4. During the movement of the support plate 6, the cleaning structure 9 will clean the debris from the surface of the mold cavity 8. After the bearing plate 6 is moved to the designated position, the operator rotates the screw shaft in the opposite direction to reset the screw shaft. At this time, the inclined surface of the reset groove 74 will push the insert 75 to move outward from the bearing plate 6 until it is inserted into the groove 72 on the positioning plate 71. Then the operator can stop rotating the screw shaft to complete the positioning work of the bearing plate 6 and prevent the bearing plate 6 from moving when the blank is cold forged.

[0028] During the movement of the support plate 6, the rack 92 will move along with it. The movement of the rack 92 will cause the gear 93 to rotate around the connecting shaft 91. The rotation of the gear 93 will cause the connecting shaft 91 to move, and the movement of the connecting shaft 91 will cause the cleaning head 94 to rotate 180°, cleaning the debris from the surface of the mold 8 that has just been processed. When the cleaning head 94 needs to be replaced, simply rotate the cover plate 95 screwed to the top of the connecting shaft 91 to remove it, and the cleaning head 94 inserted into the connecting shaft 91 can be pulled out and replaced.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-station nut cold heading forming device, comprising a bracket (1), a base (2), a hydraulic device (3), a cold heading seat (4), a guide block (5), a bearing plate (6), a positioning structure (7), a mold (8), and a cleaning structure (9), characterized in that, The bracket (1) is installed above the base (2); The hydraulic device (3) is installed above the bracket (1) and its output end extends out of the bracket (1) and is fixedly connected to the cold heading seat (4) for driving the cold heading seat (4) to impact the mold (8); The guide block (5) is installed above the base (2), and the bearing plate (6) is slidably connected to the guide block (5); The positioning structure (7) is installed on the support plate (6) and is used to lock the position of the support plate (6) on the guide block (5); The mold (8) has at least two parts and is detachably mounted on the support plate (6); The cleaning structure (9) is installed on the base (2) and is used to clean debris from the surface of the mold (8).

2. The multi-station nut cold-upsetting forming device according to claim 1, characterized in that, The positioning structure (7) includes a positioning plate (71), a groove (72), a rotating shaft (73), a reset groove (74), an insert (75), and a reset spring (76). The positioning plate (71) is fixedly installed on the base (2). There are two positioning plates (71) located on both sides of the support plate (6). The positioning plate (71) has a groove (72) on the side facing the support plate (6). The rotating shaft (73) is rotatably installed on the support plate (6) and its end extends out of the support plate (6). The rotating shaft (73) has a reset groove (74). The number of reset grooves (74) is the same as the number of molds (8). The insert (75) is slidably installed in the support plate (6) and its number and position correspond to the reset grooves (74). The reset spring (76) is located in the support plate (6) and is fitted on the insert (75). One end of the reset spring (76) is fixedly installed on the insert (75), and the other end is fixedly installed on the support plate (6).

3. The multi-station nut cold-upsetting forming device according to claim 1, characterized in that, The cleaning structure (9) includes a connecting shaft (91), a rack (92), a gear (93), a cleaning head (94), and a cover plate (95). The connecting shaft (91) is rotatably mounted on the base (2). The number of connecting shafts (91) is the same as the number of molds (8). The racks (92) are fixedly mounted on both sides of the bearing plate (6). The gears (93) are fixedly mounted on the connecting shaft (91). The gears (93) mesh with the racks (92). The cleaning head (94) is inserted into the connecting shaft (91). The cover plate (95) is screwed onto the top of the connecting shaft (91).

4. The multi-station nut cold-upsetting forming device according to claim 1, characterized in that, The base (2) is provided with support legs (10) below it. The support legs (10) are located below the base (2) and are fixedly installed at the four corners of the base (2).

5. The multi-station nut cold heading forming device according to claim 1, characterized in that, The mold (8) is bolted to the support plate (6).

6. The multi-station nut cold-heading forming apparatus according to claim 2, wherein The rotating shaft (73) is provided with an anti-slip cap (11), which is fixedly installed at the end of the rotating shaft (73).

Images