Rack adjusting pressing block riveting forming device and forming process

Abstract

The invention relates to the technical field of steering gear part riveting equipment, and provides a rack adjusting pressing block riveting forming device and process, the forming device is used for riveting a pressing block abrasive disc to a pressing block base, the pressing block abrasive disc is provided with a riveting part, the pressing block base is provided with a groove, and the bottom wall of the groove is provided with a riveting hole for containing the riveting part; the forming device comprises a riveting platform, a lower pressing head and an upper ejecting head, a concave hole is formed in the riveting platform, and the lower pressing head is arranged above the riveting platform in an up-down sliding mode. The upper ejection head slides up and down in the concave hole, the lower pressing head is configured to slide downwards and abut against the upper end face of the riveting part, the upper ejection head is configured to slide upwards and abut against the lower end face of the riveting part, and the lower pressing head and the upper ejection head are matched with each other to enable the riveting part to deform and be embedded into the inner circumferential wall of the riveting hole. According to the technical scheme, the problem that the use effect of the adjusting pressing block is poor due to the fact that the service time of the adjusting pressing block pressed through interference magnitude is prolonged and the pressing block abrasive disc and the pressing block base are loosened in the prior art is solved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of steering gear component riveting and pressing equipment. Specifically, it relates to a rack adjustment block riveting and forming device and a forming process. Background Art

[0002] In the steering gear of an automobile, the rack block, also known as the adjustment block, is a key component that is widely used. It is used to pre-tighten the rack, and the gap between the block and the rack is controlled by an adjusting nut, thereby adjusting the axial movement force of the steering gear rack.

[0003] Most of the existing rack adjustment blocks are composed of a block base and a block grinding plate. The block base is generally cylindrical, and the upper end of the cylinder has a groove that conforms to the shape of the block grinding plate, and a riveting hole is provided in the middle of the groove; the block grinding plate is made of wear-resistant material, and a riveting portion that is assembled in cooperation with the riveting hole is provided on the block grinding plate; before use, the block grinding plate needs to be pre-installed in the groove at the upper end of the block base, and the riveting portion is installed in the riveting hole.

[0004] During assembly, the two are generally riveted and combined by a riveting and pressing device. Currently, most of the riveting and pressing devices rely on the method of interference fitting, that is, the size of the riveting portion is slightly larger than the size of the riveting hole, and the riveting portion is fixed in the riveting hole. This fixing method is a traditional structural design. As the adjustment block is used, the block grinding plate and the block base are prone to looseness, which in turn leads to poor use effect of the adjustment block. Therefore, the existing technology needs to be optimized to reduce the loosening risk between the block grinding plate and the block base and improve the stability of the adjustment block during use. Summary of the Invention

[0005] To overcome the above defects, embodiments of the present invention provide a rack adjustment block riveting and forming device and a forming process, which solve the problem in the related technology that the service life of the adjustment block using interference fitting is extended, and the loosening between the block grinding plate and the block base leads to poor use effect of the adjustment block.

[0006] According to one aspect, at least one embodiment of the present invention provides a rack-adjustable press block riveting and forming device for riveting a press block grinding sheet onto a press block base. The press block grinding sheet has a downwardly protruding riveting portion, and the press block base is provided with a groove for placing the press block grinding sheet. The bottom wall of the groove has a riveting hole that penetrates up and down to accommodate the riveting portion. The rack-adjustable press block riveting and forming device includes a riveting platform, a lower pressing head, and an upper pressing head. The riveting platform is provided with a concave hole for placing the press block base. The lower pressing head is slidably arranged above the riveting platform and corresponds to the concave hole up and down. The upper pressing head slides up and down in the concave hole. The lower pressing head is configured to be able to move downward and press against the upper end face of the riveting portion. The upper pressing head is configured to be able to move upward and press against the lower end face of the riveting portion. The lower pressing head and the upper pressing head can cooperate with each other to deform the riveting portion and embed it into the inner peripheral wall of the riveting hole of the press block base.

[0007] For example, in a rack-adjustable press block riveting and forming device provided by at least one embodiment of the present invention, the lower end portion of the lower pressing head has a lower convex platform, and the upper end portion of the upper pressing head has an upper convex platform. The peripheral wall of the upper convex platform protrudes outward from the peripheral wall of the lower convex platform. The upper convex platform and the lower convex platform can approach each other and squeeze the riveting portion to cause the riveting portion to protrude outward and deform and embed into the inner peripheral wall of the riveting hole.

[0008] For example, in a rack-adjustable press block riveting and forming device provided by at least one embodiment of the present invention, it further includes: A supporting sleeve, slidably arranged up and down in the concave hole. The supporting sleeve is used to support the press block base, drive the press block base to move upward and protrude from the concave hole, and the upper pressing head is slidably arranged in the supporting sleeve.

[0009] For example, in a rack-adjustable press block riveting and forming device provided by at least one embodiment of the present invention, it further includes a feeding unit arranged on one side of the riveting platform and a transfer unit located between the feeding unit and the riveting platform. The feeding unit is used to supply the press block grinding sheets one by one, and the transfer unit is used to support the press block base and receive the press block grinding sheets supplied by the feeding unit. A feeding arm is slidably arranged horizontally on the riveting platform. The feeding arm has a clamping unit capable of clamping the press block base supported on the transfer unit. The clamping unit can drive the press block base and the press block grinding sheet to be transferred from the transfer unit to the concave hole under the translational action of the feeding arm. The clamping unit includes: A sliding seat, slidably arranged up and down on the feeding arm; Two clamping jaws, swingably arranged on the sliding seat. The two clamping jaws can swing towards each other to clamp the outer peripheral wall of the press block base.

[0010] For example, in a rack adjusting press block riveting and forming device provided by at least one embodiment of the present invention, the number of the material clamping units is two. One of the material clamping units is used to clamp the press block base to be riveted on the transfer unit to transfer the press block base and the press block grinding sheet to the concave hole, and the other material clamping unit is used to clamp the press block base after pressing at the concave hole to remove the riveted press block base and the press block grinding sheet.

[0011] For example, in a rack adjusting press block riveting and forming device provided by at least one embodiment of the present invention, the transfer unit includes: A transfer bracket, rotatably arranged on one side of the riveting platform, and a plurality of support platforms for supporting the press block base are arranged on the transfer bracket; A transfer hanging seat, slidably arranged horizontally on one side of the riveting platform and capable of horizontally moving between the feeding unit and the transfer unit; A transfer hanging head, slidably arranged up and down on the transfer hanging seat. The transfer hanging head is configured to take away the press block grinding sheet provided by the feeding unit after sliding downwards, and translate above the transfer unit under the drive of the transfer hanging seat to unload the press block grinding sheet onto the press block base supported by the support platform.

[0012] For example, in a rack adjusting press block riveting and forming device provided by at least one embodiment of the present invention, the feeding unit includes: A feeding cylinder, arranged on the side of the transfer bracket away from the riveting platform, and a spiral extending feeding chute is arranged on the inner wall of the feeding cylinder; A feeding tray, rotatably connected to the inner circumference of the feeding cylinder and located below the feeding chute. A feeding cavity for carrying the press block grinding sheet to supply materials to the feeding chute is formed above the feeding tray; The feeding chute can receive the press block grinding sheet in the feeding cavity under the rotation of the feeding tray, and enable the press block grinding sheet to slide along the feeding chute for feeding to the transfer hanging head.

[0013] For example, in a rack adjusting press block riveting and forming device provided by at least one embodiment of the present invention, the feeding unit further includes: A screening track, arranged on the feeding cylinder and communicated with the discharging end of the feeding chute, and the screening track is used to supply the press block grinding sheet to the transfer hanging head; A bottom supporting screening bar, arranged at the lower edge of the screening track, for supporting the bottom of the press block grinding sheet; An upward inclined screening bar, arranged at the upper edge of the screening track and above the bottom supporting screening bar. The upward inclined screening bar gradually spirals downwards and approaches the bottom supporting screening bar to screen out the press block grinding sheets with unqualified states.

[0014] For example, in a rack adjustment block riveting and forming device provided by at least one embodiment of the present invention, a return port is provided on the side wall of the feeding cylinder, and the feeding unit further includes: A material return cover is arranged on the outer periphery of the feeding cylinder; The return track is spirally arranged between the return material cover and the feed cylinder. The feed cylinder, the return material cover and the return track can enclose a return cavity with an upward opening. The return cavity is used to receive the pressed grinding discs screened out by the upward-inclined screen bars and guide the pressed grinding discs to flow back to the return material port.

[0015] According to another aspect, at least one embodiment of the present invention further provides a rack adjustment block riveting and forming process, which uses the aforementioned rack adjustment block riveting and forming device to perform the process, including the following steps: Step S1: feeding the pressed grinding sheets one by one using the feeding unit; Step S2: grabbing the pressed grinding disc in the loading unit and installing the pressed grinding disc on the pressed base of the transfer unit; Step S3: using the clamping unit of the feeding arm to synchronously transfer the assembled pressing block base and pressing block grinding disc on the transfer unit to the concave hole of the riveting platform; Step S4: the lower pressure head moves downward until it contacts the upper end surface of the pressing block grinding plate, the lower pressure head and the supporting sleeve move downward synchronously to move the pressing block base downward into the concave hole, the upper head moves upward and presses against the lower end surface of the riveted portion, the lower pressure head and the upper head cooperate and squeeze up and down to deform the riveted portion and embed it into the inner peripheral wall of the riveted hole of the pressing block base, the supporting sleeve moves upward and lifts the riveted pressing block base until it protrudes above the concave hole; Step S5: the clamping unit clamps the pressing block base, and transfers the riveted pressing block base and the pressing block grinding disc under the translation drive of the feeding arm.

[0016] The beneficial effects of the embodiments of the present invention are: In the present invention, by applying pressure from top to bottom simultaneously, the riveted part is compressed axially and expanded radially at the same time, forming a tight bond with the inner wall of the riveted hole and embedding into the inner wall of the riveted hole. Compared with the traditional interference fit method, the reliability and stability of the connection are improved. The bidirectional pressure from top to bottom makes the deformation of the riveted part more uniform, avoids the problems of local stress concentration and uneven deformation that may be caused by unidirectional pressure, and further enhances the connection strength. This structural design does not need to rely on excessive interference, reduces stress during assembly, reduces the risk of the pressing block grinding plate and the pressing block base loosening during use, and extends the service life of the adjustment pressing block. The lower pressure head, the upper head and the axis of the concave hole are arranged to coincide with each other, ensuring that the line of action of the force during the riveting process is consistent with the axis of the riveted part, making the deformation process more controllable and improving the stability of the riveting quality. Brief Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for describing the embodiments of the present invention will be briefly introduced below. Obviously, the drawings in the following description are only some exemplary embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the exemplary embodiments of the present invention and these drawings.

[0018] Figure 1 It is a schematic structural diagram of the overall forming device in an embodiment of the present invention; Figure 2 For Figure 1 It is a schematic structural diagram of a partial cross-section at the joint of the concave hole, the lower pressing head, the upper pushing head, the pressing block base and the pressing block grinding plate in the embodiment of Figure 3 For Figure 2 It is a partial enlarged view at position A in the embodiment of Figure 4 For Figure 1 It is a schematic structural diagram between the pressing block base and the pressing block grinding plate in the embodiment of Figure 5 For Figure 1 It is a schematic structural diagram of the relative position between the transfer unit and the riveting platform in the embodiment of Figure 6 For Figure 1 It is a schematic structural diagram of a partial cross-section at the joint of the transfer unit, the feeding unit and their operation cooperation in the embodiment of Figure 7 For Figure 1 It is a schematic structural diagram of the feeding unit in the embodiment of Figure 8 For Figure 1 It is a schematic structural diagram of the joint between the lower pressing head and the pressing block base (partial cross-section of the detection wheel) in the embodiment of Figure 9 For Figure 1 It is a schematic structural diagram of a partial cross-section where the riveting part is embedded into the inner wall of the riveting hole after the lower riveting is completed in the embodiment of Figure 10 For Figure 9 It is a partial enlarged view at position B in the embodiment of (only one form of the riveting part being embedded into the riveting hole) In the figure: 1. Riveting platform, 11. Concave hole, 21. Lower pressing head, 211. Slide groove, 212. Detection sliding seat, 213. Detection wheel, 214. Spring, 215. Lower convex platform, 22. Upper jacking head, 221. Upper convex platform, 31. Pressing block base, 311. Riveting hole, 312. Groove, 32. Pressing block grinding disc, 321. Riveting part, 4. Supporting sleeve, 5. Feeding unit, 51. Feeding tray, 52. Feeding cylinder, 521. Feeding cavity, 522. Returning material port, 53. Feeding slideway, 54. Screening track, 541. Front transition section, 542. Screening section, 543. Rear transition section, 544. Smooth section, 55. Bottom supporting screen bar, 56. Upward inclined screen bar, 57. Returning material cover, 571. Returning cavity, 58. Returning track, 6. Transfer unit, 61. Transfer bracket, 62. Support table, 63. Transfer hanging seat, 64. Transfer hanging head, 7. Feeding arm, 8. Clamping unit, 81. Sliding seat, 82. Claw. Detailed implementation manners

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention.

[0020] For the sake of simplicity of the drawings, only the parts related to the disclosure are schematically shown in each figure, and they do not represent their actual structures as products. In addition, for the sake of simplicity and understanding of the drawings, in some figures, components with the same structure or function are only schematically shown as one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation, and "several" includes "two" and "more than two".

[0021] In this article, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0023] In the description of this embodiment, the orientation or positional relationships such as "up", "down", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0024] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be construed as indicating or implying relative importance.

[0025] As Figures 1 to 10 shown, it shows a rack adjusting press block riveting and forming device in an embodiment of the present invention. A concave hole 11 is provided on the riveting platform 1 of the rack adjusting press block riveting and forming device, and a press block base 31 is placed at the concave hole 11. The press block base 31 is of a cylindrical structure, and a groove 312 is opened at its upper end. A riveting hole 311 extending along the axis direction of the press block base 31 and penetrating up and down is opened at the bottom of the groove 312, and the groove 312 communicates with the riveting hole 311. A press block grinding disc 32 is placed in the groove 312, and a riveting portion 321 that is riveted and matched with the riveting hole 311 is provided at its bottom. The press block grinding disc 32 is integrally arc-shaped, and the riveting portion 321 is located on the outer side of the arc. The lower pressing head 21 is located above the riveting platform 1 and can slide in the up and down direction; the upper pressing head 22 is located in the concave hole 11 and can also slide in the up and down direction, and the lower pressing head 21 is located above the upper pressing head 22, and the axes of the riveting hole 311 and the concave hole 11 coincide.

[0026] When performing the riveting operation, the lower pressing head 21 slides downward to squeeze the upper end face of the riveting portion 321; the press block base 31 moves downward into the concave hole 11, and at the same time the upper pressing head 22 slides upward along the concave hole 11 to press against the lower end face of the riveting portion 321. Under the combined action of the upper and lower pressures, the riveting portion 321 is deformed, the material flows around and is riveted and embedded on the inner wall of the riveting hole 311, realizing the firm connection between the press block grinding disc 32 and the press block base 31. The strength of the lower pressing head 21 and the upper pressing head 22 is greater than that of the press block grinding disc 32.

[0027] The lower end part of the down pressing head 21 matches the shape of the upper end part of the pressing block grinding plate 32, which is convenient for the uniform transmission of the acting force during riveting, avoiding accidental deformation. At the same time, near the lower end part on the side wall of the down pressing head 21, there is a sliding groove 211. A detection sliding seat 212 is slidably arranged vertically in the sliding groove 211. A detection wheel 213 is rotatably arranged on the detection sliding seat 212. A spring 214 in a compressed state is arranged between the detection sliding seat 212 and the top side wall of the sliding groove 211; the spring 214 provides a force for the detection sliding seat 212 to approach the pressing block grinding plate 32; during the downward sliding process of the down pressing head 21, the detection wheel 213 makes extrusion contact with the upper end part of the pressing block grinding plate 32 prior to the lower end part of the down pressing head 21, and the upper end face of the pressing block grinding plate 32 is detected and corrected through the detection wheel 213, avoiding the rotation of the pressing block base 31 and / or the pressing block grinding plate 32 along the circumferential direction of the pressing block base 31, and improving the assembly position accuracy of the pressing block base 31 and / or the pressing block grinding plate 32.

[0028] By applying pressure simultaneously from above and below, the riveting part 321 expands radially while being axially compressed, embedding into the inner wall of the riveting hole 311, forming a tight bond with the inner wall of the riveting hole 311. Compared with the traditional interference press-fitting method, the reliability and stability of the connection are improved. The method of applying pressure in both directions up and down makes the deformation of the riveting part 321 more uniform, avoiding the problems of local stress concentration and uneven deformation that may be caused by single-direction pressure application, and further enhancing the connection strength. This structural design does not rely on an excessive interference amount, reduces the stress during the assembly process, reduces the risk of loosening of the pressing block grinding plate 32 and the pressing block base 31 during use, and extends the service life of the adjusting pressing block. The down pressing head 21, the upper pressing head 22 and the axis of the concave hole 11 are coaxially arranged, ensuring that the action line of the force during the riveting process is consistent with the axis of the riveting part 321, making the deformation process more controllable and improving the stability of the riveting quality.

[0029] In some examples, the structure of the forming device is refined. For example, as Figures 1 to 4 shown, the lower end part of the down pressing head 21 is provided with a lower convex platform 215. When the down pressing head 21 slides downward, the lower convex platform 215 presses against the upper end part of the riveting part 321; the upper end part of the upper pressing head is provided with an upper convex platform 221. When the upper pressing head 22 slides upward, the upper convex platform 221 presses against the lower end part of the riveting part 321, and the upper convex platform 221 slides in the riveting hole 311. With the upper and lower extrusion of the upper convex platform 221 and the lower convex platform 215, the riveting part 321 deforms and extends around, and finally embeds into the inner peripheral wall of the riveting hole 311, realizing the tight bond between the riveting part 321 and the inner wall of the riveting hole 311.

[0030] [[ID=ll]]In some examples, the structure of the forming device is refined. For example, as Figures 1 to 5As shown, a supporting sleeve 4 is arranged in the concave hole 11 of the rack adjusting press block riveting and forming device. The supporting sleeve 4 can slide up and down along the concave hole 11. The upper end surface of the supporting sleeve 4 is used to support the lower end of the press block base 31, and the upper punch 22 is slidably arranged in the central hole inside the supporting sleeve 4. The shape of the concave hole 11 matches the outer peripheral shape of the press block base 31, forming a tight fitting relationship.

[0031] When riveting operation is carried out, the press block base 31 is placed on the supporting sleeve 4, the lower punch 21 presses the riveting part 321 downward, and the lower punch 21 and the supporting sleeve 4 cooperate to slide downward synchronously, so that the press block base 31 completely slides into the concave hole 11. The concave hole 11 plays a role in limiting the outer periphery of the press block base 31, preventing it from having radial displacement and deformation during the riveting process; the upper punch 22 slides upward to press against the lower end surface of the riveting part 321. At the same time, the upper punch 22 slides inside the supporting sleeve 4 to ensure the accurate and effective pushing effect on the riveting part 321.

[0032] The setting of the supporting sleeve 4 provides stable support for the press block base 31, ensures a clear force transmission path during the riveting process, enables the riveting part 321 to be uniformly stressed, and improves the riveting quality. The matching design of the concave hole 11 and the outer periphery of the press block base 31 limits the movement of the press block base 31 in the horizontal direction, avoids riveting deviation caused by the shaking of the press block base 31, ensures the centering of the riveting part 321 and the riveting hole 311, and further improves the reliability of the connection. The nested structure design of the supporting sleeve 4 and the upper punch 22 makes the two independent and cooperative with each other during the movement process, which not only ensures the pushing effect of the upper punch 22 on the riveting part 321, but also provides stable support for the press block base 31. This structural design can adapt to different sizes of press block bases 31. By replacing the corresponding supporting sleeve 4 and the concave hole 11 die, the riveting operation of various specifications of adjusting press blocks can be realized, improving the versatility and applicability of the equipment.

[0033] In some examples, the structure of the forming device is refined. For example, as Figures 1 to 7 shown, a feeding unit 5 and a transfer unit 6 are arranged on one side of the riveting platform 1 of the rack adjusting press block riveting and forming device. A feeding arm 7 and a clamping unit 8 are arranged on the riveting platform 1. The feeding unit 5 is used to store and provide the press block abrasive disc 32, and the transfer unit 6 is used to transfer the press block base 31 and the press block abrasive disc 32 from different positions to the clamping unit 8 and complete the assembly.

[0034] The feeding arm 7 is slidably arranged on the riveting platform 1 in the horizontal direction. The sliding seat 81 of the clamping unit 8 slides up and down on the feeding arm 7. Two clamping jaws 82 are swingably arranged on the sliding seat 81, and the two clamping jaws 82 swing in opposite directions. When the clamping jaws 82 swing, their inner surfaces can contact the outer periphery of the press block base 31 to realize the clamping of the press block base 31.

[0035] During operation, the feeding unit 5 transports the pressing block grinding disc 32 to a specified position. The transfer unit 6 transfers the pressing block base 31 from an external conveying mechanism to below the clamping unit 8 and places the pressing block grinding disc 32 onto the pressing block base 31. The sliding seat 81 of the clamping unit 8 slides downward, enabling the clamping jaws 82 to reach the outer peripheral position of the pressing block base 31. The two clamping jaws 82 swing in opposite directions to clamp the pressing block base 31, and then the sliding seat 81 of the clamping unit 8 slides upward. Then, the feeding arm 7 slides horizontally to transport the clamping unit 8 and the pressing block base 31 and the pressing block grinding disc 32 it holds to above the concave hole 11 for subsequent riveting operations.

[0036] The coordinated operation of the feeding unit 5 and the transfer unit 6 realizes the automatic feeding of the pressing block grinding disc 32 and the pressing block base 31, reduces manual intervention, and improves production efficiency. The design of the clamping jaws 82 of the clamping unit 8 swinging in opposite directions makes the clamping process more stable and reliable, can effectively prevent the pressing block base 31 from shaking or falling during transfer, and ensures the feeding accuracy. The horizontal sliding of the feeding arm 7 and the up-and-down sliding structure of the clamping unit 8 enable the pressing block base 31 and the pressing block grinding disc 32 to be accurately transported to above the concave hole 11, ensuring the smooth progress of the riveting operation. This automated feeding and transfer system improves the continuity and stability of the entire production process, reduces labor costs, and also reduces production errors caused by human factors, improving the consistency of product quality.

[0037] In some examples, the structure of the forming device is refined. For example, as Figures 1 to 5 shown, the number of clamping units 8 of the rack-adjusted pressing block riveting and forming device is two, namely the first clamping unit 8 and the second clamping unit 8. The first clamping unit 8 is used to clamp the pressing block base 31 before riveting and perform feeding, and the second clamping unit 8 is used to clamp the pressing block base 31 after riveting and perform discharging.

[0038] The sliding seats 81 of the two clamping units 8 are both slidably arranged up and down on the feeding arm 7, and the clamping jaws 82 are swingably arranged on the sliding seats 81. The feeding arm 7 slides horizontally to drive the two clamping units 8 to move synchronously.

[0039] During operation, the first clamping unit 8 moves to the lower part of the transfer unit 6 driven by the material conveying arm 7, clamps the assembled pressing block base 31 and the pressing block grinding disc 32, and then conveys them above the concave hole 11 for riveting operation. While the first clamping unit 8 is loading materials, the second clamping unit 8 moves to the other side of the concave hole 11 and waits. When the riveting operation is completed, the second clamping unit 8 clamps the riveted pressing block base 31. At the same time, the material conveying arm 7 slides to drive the two clamping units 8 to move synchronously. The first clamping unit 8 conveys the clamped pressing block base 31 and the pressing block grinding disc 32 above the concave hole 11, and the second clamping unit 8 conveys the riveted pressing block base 31 and the pressing block grinding disc 32 to the finished product collection area, realizing the synchronous progress of the loading and unloading operations. In this way, the cycle repeats to achieve continuous riveting operations.

[0040] The setting of the two clamping units 8 realizes the parallel operation of the loading and unloading processes, reduces the waiting time of the equipment, and significantly improves the production efficiency. Through division of labor and cooperation, the first clamping unit 8 focuses on loading, and the second clamping unit 8 focuses on unloading, avoiding the time waste and operation errors caused by the frequent task switching of the same clamping unit 8. This structural design makes the entire riveting process smoother and more continuous, can make full use of the working time of the equipment, and improves the utilization rate of the equipment. The two clamping units 8 move synchronously driven by the material conveying arm 7, simplifying the design of the control system, reducing the complexity and failure rate of the equipment, and improving the stability and reliability of the production process.

[0041] In some examples, the structure of the forming device is refined. For example, as Figures 1 to 6 shown, the transfer unit 6 of the rack-adjusted pressing block riveting and forming device includes a transfer bracket 61 rotatably arranged on one side of the riveting platform 1. A number of supporting platforms 62 are arranged on the transfer bracket 61, and the supporting platforms 62 are used to support the pressing block base 31. A transfer hanging seat 63 is slidably arranged on the same side of the riveting platform 1, and a transfer hanging head 64 is slidably arranged up and down on the transfer hanging seat 63 and is located above the feeding unit 5.

[0042] When the pressing block grinding disc 32 is conveyed to the designated position by the feeding unit 5, the transfer hanging head 64 slides downwards, and its lower end surface contacts the upper end surface of the pressing block grinding disc 32 and takes away the pressing block grinding disc 32 by the gas negative pressure adsorption method in the prior art; the transfer hanging seat 63 slides horizontally, driving the transfer hanging head 64 to move above the transfer bracket 61; the transfer hanging head 64 slides downwards again, and places the pressing block grinding disc 32 into the upper end groove 312 of the pressing block base 31 on the supporting platform 62, completing the assembly of the pressing block grinding disc 32 and the pressing block base 31. The transfer bracket 61 can rotate around its rotation center to transfer the assembled workpiece to the next working station.

[0043] The rotational setting of the transfer bracket 61 and the sliding fit of the transfer lifting seat 63 realize the automatic transfer process of the pressing block grinding disc 32 from material taking to placement, avoiding the positioning deviation and low efficiency caused by manual handling. The lifting effect of the support table 62 on the pressing block base 31 ensures the position accuracy during assembly. The up-and-down sliding movement of the transfer lifting head 64 precisely controls the placement depth of the pressing block grinding disc 32, aligning the riveting part 321 with the riveting hole 311 accurately. This structural design replaces manual labor with mechanical automation, improving the stability and consistency of the assembly process and providing guarantee for the accuracy of subsequent riveting operations.

[0044] In some examples, the structure of the forming device is refined. For example, as Figures 1 to 7 shown, the feeding unit 5 of the rack-adjusting pressing block riveting and forming device includes a feeding tray 51 rotatably arranged on one side of the transfer bracket 61 away from the riveting platform 1. A feeding cylinder 52 is sleeved on the outer periphery of the feeding tray 51 and is rotatably connected to the feeding tray 51, forming a feeding cavity 521 therebetween to carry the pressing block grinding disc 32. A spiral feeding chute 53 is arranged on the inner side wall of the feeding cylinder 52, and its bottom is lapped on the upper end face of the feeding tray 51.

[0045] When the feeding tray 51 rotates, the pressing block grinding disc 32 rotates synchronously with the feeding tray 51. Under the combined action of centrifugal force and the guiding of the spiral chute, the grinding disc slides from bottom to top along the edge of the feeding tray 51 to the entrance of the feeding chute 53, and then slides along the spiral extension direction of the feeding chute 53 to the top of the feeding cylinder 52, and finally discharges from the discharge end of the chute to enter the next process.

[0046] The design of the spiral feeding chute 53 utilizes the combined action of centrifugal force and gravity, enabling the pressing block grinding discs 32 to automatically and orderly change from a stacked state to a single-column conveying state, avoiding mutual jamming between the pressing block grinding discs 32. At the same time, the pushing effect between the pressing block grinding discs 32 is used to push the pressing block grinding discs 32 to slide along the feeding chute 53. The rotational connection between the feeding tray 51 and the feeding cylinder 52 ensures the continuity of the grinding disc conveying process, and the lapping structure enables the grinding disc to smoothly transition to the chute, reducing collisions and damages during the conveying process. This feeding method realizes the automatic sorting and conveying of the grinding discs through mechanical transmission, improving the feeding efficiency and reducing the labor intensity of manually sorting the grinding discs.

[0047] In some examples, the structure of the forming device is refined. For example, as Figures 1 to 7As shown, a feeding unit 5 of the rack adjusting pressing block riveting and forming device is provided with a screening track 54 at the upper end of a feeding cylinder 52. The feeding end of the screening track 54 is communicated with the discharging end of a feeding chute 53, and the discharging end is located below a transfer lifting head 64. A bottom supporting screening bar 55 is arranged at the lower edge of the screening track 54 to support the bottom of the pressing block grinding disc 32 (i.e., the side of the pressing block grinding disc 32 in contact with the groove 312), and an upwardly inclined screening bar 56 is arranged at the upper edge. The upwardly inclined screening bar 56 is spiral-shaped and its height gradually decreases from the feeding end to the discharging end. The end of the upwardly inclined screening bar 56 is slightly bent away from the feeding tray 51, which is convenient for pushing the unqualified pressing block grinding discs 32 off the screening track 54.

[0048] After the pressing block grinding disc 32 enters from the feeding end of the screening track 54, the pressing block grinding discs 32 in qualified states (i.e., the riveting part 321 faces downward and the general plane of the pressing block grinding disc 32 is horizontal) are supported by the bottom supporting screening bar 55 and slide along the track to the discharging end; the grinding discs in unqualified states (such as being inclined or inverted) slide off due to the offset of the center of gravity, are blocked by the upwardly inclined screening bar 56, and tilt and slide in the direction away from the upwardly inclined screening bar 56, realizing state screening.

[0049] Specifically, the screening track 54 includes a front transition section 541, a screening section 542, a rear transition section 543, and a smooth section 544 connected in sequence; the front transition section 541 is connected to the feeding chute 53; the front transition section 541 is used for gradually guiding the horizontally sliding pressing block grinding disc 32 into an inclined state. At this time, the riveting part 321 of the qualified pressing block grinding disc 32 overlaps the upper end of the bottom supporting screening bar 55, and the rest is located between the bottom supporting screening bar 55 and the upwardly inclined screening bar 56 and does not form an overlap with the upwardly inclined screening bar 56; for the unqualified pressing block grinding discs 32, such as the riveting part 321 facing outward directly slides off the bottom supporting screening bar 55; or although the riveting part 321 overlaps the bottom supporting screening bar 55, but the rest of the parts overlap the upwardly inclined screening bar 56. With the sliding of the pressing block grinding disc 32, under the extrusion of the upwardly inclined screening bar 56, the pressing block grinding disc 32 tilts and flips in the direction away from the upwardly inclined screening bar 56 and finally falls off the screening track 54, completing the screening of the pressing block grinding disc 32; after screening, the qualified pressing block grinding discs 32 are adjusted from an inclined state to a horizontal state under the guiding action of the rear transition section 543 and finally conveyed to the end of the smooth section 544, waiting for the transfer lifting head 64 to pick up the material. A limiting part is arranged at the end of the smooth section 544 to prevent the pressing block grinding disc 32 from falling off the smooth section 544.

[0050] The cooperation between the bottom support sieve bar 55 and the upward-tilting sieve bar 56 forms an automatic screening mechanism for the attitude of the briquetting abrasive disc 32. Through the design of gravity and the tilting angle of the upward-tilting sieve bar 56, it is ensured that only the abrasive discs with correct attitudes enter the subsequent processes, avoiding riveting deviations caused by incorrect attitudes of the abrasive discs. The design of the gradually changing height of the spiral upward-tilting sieve bar 56, that is, the gap between the bottom support sieve bar 55 and the upward-tilting sieve bar 56 gradually becomes smaller, enables the briquetting abrasive disc 32 to receive a pushing force from the upward-tilting sieve bar 56, causing the briquetting abrasive disc 32 to tilt and turn away from the upward-tilting sieve bar 56, and finally fall from the screening material track 54, completing the automatic screening of the state of the briquetting abrasive disc 32; no additional power drive is required, simplifying the screening process. This structure effectively improves the qualification rate of the attitudes of the abrasive discs entering the riveting process, reduces the reject rate caused by incorrect attitudes, and improves the overall production quality.

[0051] In some examples, the structure of the forming device is refined. For example, as Figures 1 to 7 shown, a return material port 522 is opened on the side wall of the material conveying cylinder 52 of the rack-adjusted briquetting riveting forming device, and a return material cover 57 is arranged on the outer periphery of the material conveying cylinder 52 and forms a return flow cavity 571 with the material conveying cylinder 52. The return flow track 58 is arranged in a spiral shape in the return flow cavity 571, its feeding end receives the unqualified briquetting abrasive discs 32 screened out by the upward-tilting sieve bar 56, and its discharging end is communicated with the return material port 522.

[0052] When the unqualified abrasive discs slide from the upward-tilting sieve bar 56 to the return flow track 58, they slide downward along the spiral return flow track 58 under the action of gravity, and finally re-enter the feeding cavity 521 through the return material port 522, and are mixed with the briquetting abrasive discs 32 on the feeding tray 51 and participate in the screening process again.

[0053] The setting of the return flow track 58 and the return material port 522 forms an automatic return flow system for unqualified abrasive discs, enabling the abrasive discs that do not pass the screening to re-enter the feeding process without manual collection, avoiding material waste and manual intervention. The design of the spiral return flow track 58 extends the return path of the abrasive discs, ensuring that the abrasive discs can smoothly fall back to the feeding cavity 521 and match the rotation rhythm of the feeding tray 51. This structure realizes the recycling of materials, improves the material utilization rate, and at the same time reduces the material accumulation on the production line, forms a closed loop for the entire feeding system, and enhances the continuity and stability of the equipment operation.

[0054] A rack-adjusted briquetting riveting forming process uses the forming device described above for operation. Combining Figures 1 to 8 shown, the specific steps are as follows: Step S1: Feeding of the briquetting abrasive disc 32; The rotation of the loading tray 51 drives the pressing block abrasive disc 32 to move within the loading cavity 521 formed by the material conveying cylinder 52 and the loading tray 51. Under the action of centrifugal force, the abrasive disc slides along the edge of the loading tray 51 to the entrance of the loading chute 53, and then slides upward along the spiral loading chute 53. When the abrasive disc enters the screening track 54, the bottom supporting screening bars 55 lift the bottom of the abrasive disc, and the upward-inclined screening bars 56 screen out the abrasive discs with unqualified postures. The qualified abrasive discs continue to slide to below the transfer lifting head 64.

[0055] Step S2: Transfer and assembly of the pressing block abrasive disc 32; The external conveying mechanism conveys the pressing block base 31 to the platform 62 of the transfer bracket 61. The transfer lifting head 64 slides downward to pick up the pressing block abrasive disc 32 at the discharge end of the screening track 54. The transfer lifting seat 63 slides to convey the abrasive disc above the transfer bracket 61. The transfer lifting head 64 slides downward again to place the abrasive disc into the groove 312 of the pressing block base 31, completing the assembly.

[0056] Step S3: Transfer of the pressing block base 31 and the pressing block abrasive disc 32; The transfer bracket 61 rotates to transfer the assembled pressing block base 31 and the pressing block abrasive disc 32 to below the first clamping unit 8.

[0057] Step S4: Clamping of the pressing block base 31 and the pressing block abrasive disc 32; The sliding seat 81 of the first clamping unit 8 slides downward, and the clamping jaws 82 swing to clamp the outer periphery of the pressing block base 31. The feeding arm 7 slides to convey the clamping unit 8 and the workpiece above the concave hole 11.

[0058] Step S5: Riveting operation and blanking operation; The lower pressure head 21 slides downward to squeeze the upper end face of the riveting part 321, the upper push head 22 slides upward to push the lower end face of the riveting part 321, and the supporting sleeve 4 slides downward to make the pressing block base 31 enter the concave hole 11. The concave hole 11 limits the outer periphery of the pressing block base 31. The riveting part 321 deforms under the action of the upper and lower pressures and is riveted and embedded into the inner wall of the riveting hole 311.

[0059] The lower pressure head 21 slides upward, and the supporting sleeve 4 slides upward to eject the pressing block base 31 from the concave hole 11. The second clamping unit 8 clamps the riveted workpiece, and the feeding arm 7 slides to convey it to the finished product collection area; then the feeding arm 7 slides again, the first clamping unit 8 returns to the loading position, and the second clamping unit 8 is located on one side of the concave hole 11 waiting for blanking, and the cycle operation is carried out.

[0060] Through the spiral chute and screening mechanism of the feeding unit 5, the automatic sorting and attitude screening of the briquetting abrasive disc 32 are realized, improving the feeding accuracy and efficiency. The coordinated action of the transfer unit 6 and the clamping unit 8 ensures the precise positioning and rapid transfer of workpieces between various processes, reduces manual intervention, and improves production stability. During the riveting process, the cooperation between the limit of the concave hole 11 on the briquetting base 31 and the up-and-down double-sided pressing structure makes the deformation of the riveting part 321 uniform, enhances the connection strength, and reduces the risk of loosening. The entire technological process forms a closed loop, and the unqualified abrasive discs are recycled through the reflux system, improving the material utilization rate. At the same time, the parallel operation of multiple clamping units 8 realizes the synchronization of feeding and discharging, significantly improving the production efficiency and effectively solving the problems of loose adjustment of briquetting riveting and low production efficiency in the prior art.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A rack adjusting press block riveting and forming device is used to rivet a press block grinding sheet (32) onto a press block base (31). The press block grinding sheet (32) has a downwardly convex riveting portion (321). A groove (312) for placing the press block grinding sheet (32) is provided on the press block base (31). A riveting hole (311) that penetrates up and down to accommodate the riveting portion (321) is provided on the bottom wall of the groove (312). It is characterized in that, The rack adjustment pressure block riveting forming device comprises a riveting platform (1), a lower pressure head (21) and an upper head (22), wherein the riveting platform (1) is provided with a recessed hole (11) for placing the pressure block base (31), the lower pressure head (21) is arranged above the riveting platform (1) to slide up and down and corresponds to the recessed hole (11); the upper head (22) slides up and down in the recessed hole (11), the lower pressure head (21) is configured to be able to move downward and press downward against the upper end face of the riveted part (321), the upper head (22) is configured to be able to move upward and press upward against the lower end face of the riveted part (321), the lower pressure head (21) and the upper head (22) can cooperate with each other to deform the riveted part (321) and embed it into the inner peripheral wall of the riveted hole (311) of the pressure block base (31).

2. The rack adjusting press block riveting and forming device according to claim 1, characterized in that, The lower end of the lower pressing head (21) has a lower boss (215), and the upper end of the upper pressing head (22) has an upper boss (221), and the peripheral wall of the upper boss (221) protrudes outward from the peripheral wall of the lower boss (215); the upper boss (221) and the lower boss (215) can approach each other and squeeze the riveted portion (321) so that the riveted portion (321) protrudes outward and deforms and is embedded in the inner peripheral wall of the riveted hole (311).

3. The rack adjusting press block riveting and forming device according to claim 1, characterized in that, Also includes: The supporting sleeve (4) is slidably arranged in the concave hole (11) up and down. The supporting sleeve (4) is used to support the pressing block base (31) and to drive the pressing block base (31) to move upward and protrude from the concave hole (11). The upper head (22) is slidably arranged in the supporting sleeve (4).

4. A rack adjusting press block riveting and forming device according to any one of claims 1 to 3, characterized in that, The invention also includes a loading unit (5) arranged on one side of the riveting platform (1) and a transfer unit (6) located between the loading unit (5) and the riveting platform (1), wherein the loading unit (5) is used to supply the pressed grinding discs (32) one by one, and the transfer unit (6) is used to support the pressed base (31) and receive the pressed grinding discs (32) supplied by the loading unit (5); a feeding arm (7) is provided on the riveting platform (1) so as to slide in the horizontal direction, and the feeding arm (7) has a clamping unit (8) capable of clamping the pressed base (31) supported by the transfer unit (6), and the clamping unit (8) can drive the pressed base (31) and the pressed grinding disc (32) to be transferred from the transfer unit (6) to the concave hole (11) under the translation action of the feeding arm (7), and the clamping unit (8) includes: A sliding seat (81) is slidably disposed on the feeding arm (7); Two clamping jaws (82) are swingably arranged on the sliding seat (81), and the two clamping jaws (82) can swing toward each other to clamp the outer peripheral wall of the pressure block base (31).

5. A rack adjusting press block riveting and forming device according to claim 4, characterized in that, The number of the material clamping units (8) is two. One of the material clamping units (8) is used to clamp the base block (31) to be riveted on the transfer unit (6) to transfer the base block (31) and the grinding disc (32) of the block to the concave hole (11), and the other material clamping unit (8) is used to clamp the base block (31) after riveting at the concave hole (11) to remove the base block (31) and the grinding disc (32) after riveting.

6. A rack adjusting press block riveting and forming device according to claim 4, characterized in that, The transfer unit (6) includes: A transfer bracket (61) rotatably arranged on one side of the riveting platform (1), and a plurality of platforms (62) for supporting the base block (31) are arranged on the transfer bracket (61); A transfer hanging seat (63) slidably arranged horizontally on one side of the riveting platform (1) and capable of horizontally moving between the feeding unit (5) and the transfer unit (6); A transfer hanging head (64) slidably arranged up and down on the transfer hanging seat (63). The transfer hanging head (64) is configured to pick up the grinding disc (32) provided by the feeding unit (5) after sliding downwards, and translate above the transfer unit (6) driven by the transfer hanging seat (63) to drop the grinding disc (32) onto the base block (31) supported by the platform (62).

7. A rack adjusting press block riveting and forming device according to claim 6, characterized in that, The feeding unit (5) includes: A feeding cylinder (52) arranged on the side of the transfer bracket (61) away from the riveting platform (1), and a feeding chute (53) extending spirally is arranged on the inner wall of the feeding cylinder (52); A feeding tray (51) rotatably connected to the inner circumference of the feeding cylinder (52) and located below the feeding chute (53). A feeding cavity (521) for carrying the grinding disc (32) to supply materials to the feeding chute (53) is formed above the feeding tray (51); The feeding chute (53) can receive the grinding disc (32) in the feeding cavity (521) under the rotation of the feeding tray (51), and make the grinding disc (32) slide along the feeding chute (53) to be fed to the transfer hanging head (64).

8. A rack adjusting press block riveting and forming device according to claim 7, characterized in that, The feeding unit (5) further includes: A screening track (54) arranged on the feeding cylinder (52) and communicated with the discharge end of the feeding chute (53), and the screening track (54) is used to supply the grinding disc (32) to the transfer hanging head (64); A bottom supporting screening bar (55) arranged at the lower edge of the screening track (54) for supporting the bottom of the grinding disc (32); An upward inclined screening bar (56) arranged at the upper edge of the screening track (54) and above the bottom supporting screening bar (55). The upward inclined screening bar (56) gradually spirals downwards and approaches the bottom supporting screening bar (55) to screen out the grinding discs (32) with unqualified states.

9. A rack adjusting press block riveting and forming device according to claim 8, characterized in that, A return material port (522) is opened on the side wall of the feeding cylinder (52), and the feeding unit (5) further includes: A return material cover (57) arranged on the outer circumference of the feeding cylinder (52); The return track (58) is spiral and is arranged between the return material cover (57) and the material conveying cylinder (52). The material conveying cylinder (52), the return material cover (57) and the return track (58) can enclose a return cavity (571) with an upward opening. The return cavity (571) is used to receive the briquette grinding discs (32) screened by the upward-inclined sieve bars (56) and guide the briquette grinding discs (32) to flow back to the material return port (522).

10. A riveting and forming process for a rack adjusting press block, which uses a riveting and forming device for a rack adjusting press block described in claim 9 for operation, is characterized in that, It includes the following steps: Step S1: Use the feeding unit (5) to feed the briquette grinding discs (32) one by one; Step S2: Grasp the briquette grinding discs (32) in the feeding unit (5) and install the briquette grinding discs (32) on the briquette base (31) of the transfer unit (6); Step S3: Use the clamping unit (8) of the material conveying arm (7) to synchronously transfer the assembled briquette base (31) and briquette grinding discs (32) on the transfer unit (6) to the concave hole (11) of the riveting platform (1); Step S4: The lower pressing head (21) moves down to contact the upper end surface of the briquette grinding disc (32). The lower pressing head (21) and the supporting sleeve (4) move down synchronously so that the briquette base (31) moves down into the concave hole (11). The upper pressing head (22) moves upward and presses against the lower end surface of the riveting portion (321). The lower pressing head (21) and the upper pressing head (22) cooperate to squeeze up and down so that the riveting portion (321) deforms and is embedded into the inner peripheral wall of the riveting hole (311) of the briquette base (31). The supporting sleeve (4) moves up and jacks up the riveted briquette base (31) to protrude above the concave hole (11); Step S5: The clamping unit (8) clamps the briquette base (31) and transfers the riveted briquette base (31) and briquette grinding discs (32) under the translational drive of the material conveying arm (7).

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