Rivet press-in force and press-out force detection system
By integrating a force sensor and displacement acquisition module into a pressure testing machine, and combining it with detachable press-in and press-out testing fixtures, the high cost and cumbersome operation caused by separate equipment in existing technologies are solved. This achieves efficient integration and unified data management of rivet press-in and press-out testing, ensuring the accuracy and ease of testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO MINDA AUTOMOBILE TECH CO LTD
- Filing Date
- 2026-03-12
- Publication Date
- 2026-04-10
AI Technical Summary
In existing technologies, the detection of rivet pressing force and pressing force requires separate equipment, which results in high equipment costs, cumbersome operation, and difficulty in data integration, making it difficult to achieve a rapid and systematic comprehensive evaluation.
Design a pressure testing machine that integrates a force sensor and a displacement acquisition module, equipped with detachable indentation and extrusion detection fixtures. It enables quick replacement and precise positioning through standardized interfaces and positioning shafts, ensuring unified data management and test stability.
It achieves efficient integration of rivet insertion and ejection detection, reduces equipment costs, simplifies operation procedures, and ensures unified data management and testing accuracy.
Smart Images
Figure CN224109313U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to rivet performance test technical field, specifically relates to a rivet pressure into force and pressure out force detection system. BACKGROUND
[0002] At present, in the industrial practice and laboratory research, the detection of the two indexes of the pressure into force (namely the force required for the rivet in the process of being pressed into the plate) and the pressure out force (or the pulling force, namely the force required for the rivet to be pulled out axially from the assembly) usually adopts the scheme and equipment independent of each other. The pressure into force detection is completed by the material testing machine with the function of pressing down or the special pressure equipment, with the simple supporting mold; and the pressure out force (the pulling force) detection needs to adopt the tension testing machine with the function of stretching, and is equipped with the specially designed clamping tool to fix the riveted plate, and then the rivet is pulled through the connecting piece.
[0003] This separate detection system has obvious limitations: firstly, it needs to be equipped with at least two testing equipment with different functions, which not only has high equipment purchase and maintenance cost, but also occupies more laboratory space. Secondly, the operator needs to transfer the test piece, change the tooling and set the test program respectively between different equipment, and the operation process is complicated, and the detection efficiency is low. Thirdly, since the test platforms are separated, the obtained pressure into force and pressure out force data are often stored in different systems or files, and the data integration and comparative analysis are inconvenient, and it is difficult to quickly and systematically evaluate the rivet performance under the same batch or the same process parameters.
[0004] Therefore, the industry urgently needs a detection system that can efficiently integrate the rivet pressure into and pressure out detection functions, is easy to operate and can ensure data consistency, so as to overcome the above-mentioned defects in the prior art and meet the higher requirements of modern production on quality control efficiency and precision. UTILITY MODEL CONTENTS
[0005] In order to solve the above technical problems, the utility model solves the problems through the following technical schemes.
[0006] A rivet pressure into force and pressure out force detection system, comprising a pressure testing machine, the pressure testing machine is integrated with a force sensor and a displacement acquisition module, the pressure testing machine comprises a workbench and a liftable lower pressing beam, the workbench is provided with a lower mounting part at the upper end, and the lower pressing beam is provided with an upper mounting part at the lower end. The system further comprises a pressure into detection tooling and a pressure out detection tooling, and the pressure into detection tooling and the pressure out detection tooling are selectively and detachably installed on the pressure testing machine.
[0007] The press-in detection tool includes a press-in positioning seat and a press-in ram, the press-in positioning seat is installed on the lower mounting part, and the press-in ram is installed on the upper mounting part; the press-in positioning seat is used for positioning the rivet to be pressed in with the front surface of the riveted plate facing upward, and the press-in ram is used for pressing the rivet into the riveted plate; and the pressure testing machine collects the press-in force in real time during the pressing process.
[0008] The press-out detection tool includes a press-out positioning seat, a press-out ram, and a press-out connecting piece, the press-out positioning seat is installed on the lower mounting part, and the press-out ram is installed on the upper mounting part; the press-out positioning seat is used for clamping the riveted plate with the assembled rivet in the posture with the back surface of the riveted plate facing upward, one end of the press-out connecting piece is connected with the rivet rod, the other end is matched with the press-out ram, the press-out ram applies axial press-out force to the rivet through the press-out connecting piece to make the rivet separate from the riveted plate, and the pressure testing machine collects the press-out force in real time during the pressing process.
[0009] Further, the upper end surface of the lower mounting part is provided with a lower mounting hole in the center, the bottom of the press-in positioning seat is provided with a first lower positioning shaft matched with the lower mounting hole in a plug-in manner, and the bottom of the press-out positioning seat is provided with a second lower positioning shaft matched with the lower mounting hole in a plug-in manner.
[0010] Further, the lower end surface of the upper mounting part is provided with an upper mounting hole in the center, and the sidewall of the upper mounting part is provided with a radial through fixing hole; the top of the press-in ram is provided with a first upper positioning shaft matched with the upper mounting hole in a plug-in manner, and the top of the press-out ram is provided with a second upper positioning shaft matched with the upper mounting hole in a plug-in manner; the first upper positioning shaft and the second upper positioning shaft are both provided with a pin hole corresponding to the fixing hole, and the fixing pin passes through the fixing hole and the corresponding pin hole to realize locking.
[0011] Further, the lower end of the first upper positioning shaft and the lower end of the second upper positioning shaft are both screwed with a locking nut, and the top surface of the locking nut abuts against the bottom surface of the upper mounting part when being tightened, so as to axially fix the press-in ram or the press-out ram.
[0012] Further, the press-in positioning seat includes a press-in seat body, a guide block, and a limiting block; the guide block is embedded in the press-in seat body, and the middle part is provided with a guide hole through which the rivet rod passes; and the upper end surface of the limiting block is provided with two symmetrically distributed limiting protrusions for stopping and positioning the riveted plate.
[0013] Further, the pressing positioning seat comprises a pressing seat body, an abutting block, a clamping block and a locking sleeve; a counterbore for accommodating the head of the rivet is arranged in the middle of the abutting block; a reverse T-shaped through slot is arranged on the upper end surface of the clamping block and penetrates in the insertion direction of the riveting plate, and the reverse T-shaped through slot is formed by the upper end surface of the clamping block and the clamping flanges protruding upward on both sides; an outer flange is arranged on the bottom of the clamping block, and an inner flange matched with the outer flange is arranged on the inner wall of the locking sleeve; the locking sleeve is threadedly connected with the pressing seat body; after the riveting plate is inserted into the reverse T-shaped through slot, the lower surface of the clamping flange and the upper end surface of the abutting block jointly clamp and fix the riveting plate.
[0014] Compared with the prior art, the application has the following technical effects:
[0015] 1. The rivet pressing-in and pressing-out (pressing-out) two key performance tests are integrated on the same platform by using a pressure testing machine integrated with a force sensor and a displacement acquisition module, cooperating with the quickly replaceable pressing-in detection tool and the pressing-out detection tool, which simplifies the equipment configuration, reduces the cost, and facilitates the unified management and analysis of data.
[0016] 2. The standardized lower mounting hole is arranged on the lower mounting part, the positioning shaft matched with the lower mounting hole is arranged on the bottom of the pressing-in and pressing-out positioning seat, the standardized upper mounting hole and the radial fixing hole are arranged on the upper mounting part, and the corresponding positioning shaft and pin hole are arranged on the top of the pressing head and the pressing-out head, so that the quick and accurate positioning and installation of the two kinds of positioning seats on the workbench are realized.
[0017] 3. The locking nut is arranged on the positioning shaft, the top surface of the locking nut is abutted against the bottom surface of the upper mounting part by tightening, the pressing head is further locked in the axial direction, the micro movement or loosening of the pressing head in the process of high-load pressing-in or pressing-out is effectively prevented, and the stability of the force transmission path and the accuracy of the test data are ensured.
[0018] 4. The guide hole on the guide block performs initial guidance on the rivet rod, and ensures the accuracy of the pressing-in starting position; the symmetrical limiting protrusions on the limiting block stop the edge of the riveting plate, so that the quick and accurate positioning of the riveting plate in the horizontal direction is realized, and the relative position of the rivet and the riveting plate hole before pressing-in is accurately ensured.
[0019] 5. The design of the reverse T-shaped through slot and the clamping flange facilitates the quick insertion of the riveting plate into the positioning. When the locking sleeve is screwed into the pressing-out seat, the inner flange of the locking sleeve interacts with the outer flange of the clamping block, forcing the clamping block to move downward, and the lower surface of the clamping flange and the upper end surface of the abutting block tightly clamp the riveting plate. This structure can effectively prevent the riveting plate from moving, warping or detaching during the pressing-out of the rivet, and ensure that the pressing-out force is completely used to overcome the bonding force of the rivet and the plate, so that the accurate pressing-out force value is measured. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 The plane structure diagram of the pressure testing machine and two toolings.
[0021] Figure 2 The perspective view of the pressure testing machine assembling the press-in detection tooling.
[0022] Figure 3 The perspective view of the pressure testing machine assembling the press-in detection tooling. Figure 2 The partial enlarged view of A in the middle.
[0023] Figure 4 The exploded view of the press-in detection tooling.
[0024] Figure 5 The perspective view of the pressure testing machine assembling the press-out detection tooling.
[0025] Figure 6 The perspective view of the pressure testing machine assembling the press-out detection tooling. Figure 5 The partial enlarged view of B in the middle.
[0026] Figure 7 The exploded view of the press-out detection tooling.
[0027] The list of component names and corresponding reference numbers:
[0028] 100, pressure testing machine; 110, lower pressing beam; 111, upper mounting part; 112, fixing hole; 120, workbench; 121, lower mounting part;
[0029] 210, press-in positioning seat; 211, press-in seat body; 212, first lower positioning shaft; 220, guide block; 221, guide hole; 230, limiting block; 231, limiting protrusion; 240, press-in pressure head; 241, first upper positioning shaft; 242, pin hole;
[0030] 310, press-out positioning seat; 311, press-out seat body; 312, second lower positioning shaft; 320, abutting block; 321, counterbore; 330, clamping block; 331, inverted T-shaped through slot; 332, clamping flange; 333, outer flange; 340, locking sleeve; 341, inner flange; 350, press-out pressure head; 351, second upper positioning shaft; 360, press-out connecting piece;
[0031] 400, fixing pin; 500, locking nut; 600, rivet; 700, riveting plate. DETAILED DESCRIPTION
[0032] The utility model will be described in further detail below in combination with the drawings and specific embodiments.
[0033] In the following embodiments, the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout, and the embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as limiting the present application.
[0034] In the description of the present application, it should be understood that the terms: center, longitudinal, transverse, length, width, thickness, upper, lower, front, rear, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, counterclockwise, etc. Indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as limiting the present application. In addition, the terms: first, second, etc. Are only for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features shown. In the description of the present application, unless otherwise explicitly specified and limited, the terms: mounting, connecting, connecting, etc. Should be understood in a broad sense, and those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.
[0035] Reference Figures 1 to 7 A rivet pressing-in force and pressing-out force detection system includes a pressure testing machine 100, which is a frame structure and includes a base, a stand, a liftable lower pressing beam 110, and a control and display unit. The lifting of the lower pressing beam 110 is controlled by a servo drive system, which is internally integrated with a high-precision force sensor and a displacement acquisition module, capable of real-time synchronous acquisition and recording of force and displacement data during the test process. The upper end of the workbench 120 of the pressure testing machine 100 is provided with a lower mounting part 121, and the lower end of the lower pressing beam 110 is provided with an upper mounting part 111, which constitutes the basic interface for quick replacement of the tool.
[0036] In order to realize the quick switching of the pressing-in and pressing-out test functions, the system is equipped with two independent and interchangeable special tools, namely the pressing-in detection tool and the pressing-out detection tool. A standardized lower mounting hole is machined in the center of the upper end face of the lower mounting part 121 for precise positioning. A standardized upper mounting hole is machined in the center of the lower end face of the upper mounting part 111, and a radial through fixing hole 112 is opened in the side wall for locking.
[0037] Reference Figures 2 to 4, the press-in detection tooling includes a press-in positioning seat 210 and a press-in pressure head 240. The press-in positioning seat 210 includes a press-in seat body 211 as a rigid base, and a first lower positioning shaft 212 is arranged at the bottom center of the seat body for interfacing with the workbench 120. A guide block 220 made of wear-resistant material is embedded on the seat body, and a guide hole 221 is formed in the middle of the guide block 220 for guiding the shank of the rivet 600. The guide block 220 is sleeved with a limiting block 230, and two symmetric limiting protrusions 231 are arranged on the upper end face of the limiting block 230. The lower end of the press-in pressure head 240 is used to press the head of the rivet 600, and the upper end is provided with a first upper positioning shaft 241 for connecting with the lower pressing beam 110, and a pin hole 242 is formed in the first upper positioning shaft 241, and a locking nut 500 is arranged thereon.
[0038] When performing press-in detection, the press-in detection tooling is installed. The press-in positioning seat 210 of the tooling is inserted into the lower mounting hole of the workbench 120 through the first lower positioning shaft 212 at the bottom, achieving rapid centering positioning and installation. The press-in positioning seat 210 includes a press-in seat body 211, and a guide block 220 with a guide hole 221 in the middle is embedded on the seat body for guiding the shank of the rivet 600; the seat body is also fixed with a limiting block 230, and two symmetric limiting protrusions 231 on the upper end face of the limiting block 230 are used to stop and position the riveting plate 700 placed thereon, ensuring the accurate position of the riveting plate 700. After the first upper positioning shaft 241 of the press-in pressure head 240 is inserted into the upper mounting hole of the upper mounting portion 111, the radial locking is realized by using the fixing pin 400 to pass through the side wall fixing hole 112 and the pin hole 242 on the positioning shaft, and then the locking nut 500 is screwed onto the lower end of the positioning shaft and tightened, so that the top surface of the locking nut 500 abuts against the bottom surface of the upper mounting portion 111, completing the axial fastening. During testing, the riveting plate 700 is placed on the positioning seat, the rivet 600 is erected at the predetermined position, the equipment is started, and the lower pressing beam 110 drives the press-in pressure head 240 to press down, thereby pressing the rivet 600 into the plate. The system records the displacement-press-in force curve in real time.
[0039] Reference Figures 5 to 7 Figures 5 to 7 , the press-out detection tooling includes a press-out positioning seat 310, a press-out pressure head 350, and a press-out connecting piece 360. The press-out positioning seat 310 includes a press-out seat body 311 with a second lower positioning shaft 312, and a contact block 320 with a counterbore 321 in the middle is placed in the cavity of the seat body. A clamping block 330 is arranged above the contact block 320, and a reverse T-shaped through slot 331 is formed on the upper end face of the clamping block 330 in the direction of inserting the test piece. The through slot is formed by the clamping block 330 body and the clamping flanges 332 protruding towards the center on both sides, and an outer flange 333 is formed on the bottom of the clamping block 330. A locking sleeve 340 with an inner flange 341 on the inner wall is connected to the upper part of the press-out seat body 311 by screwing. The press-out pressure head 350 has a similar structure and installation method as the press-in pressure head 240, and a second upper positioning shaft 351 is arranged on the top.
[0040] When the extrusion test is performed, the extrusion test tool is installed. The extrusion positioning seat 310 is installed to the workbench 120 through the second lower positioning shaft 312 at the bottom. The rivet plate 700 with the rivet 600 assembled is inserted into the inverted T-shaped through slot 331 with the reverse surface upward (the rod part of the rivet 600 is upward and the head part is downward), the head part of the rivet 600 is fallen into the counterbore 321 of the abutting block 320, then the locking sleeve 340 is screwed, the inner flange 341 of the locking sleeve 340 presses the outer flange 333 of the clamping block 330, the clamping flange 332 is forced to tightly clamp the rivet plate 700 on the upper end surface of the abutting block 320. The extrusion press head 350 is provided with the second upper positioning shaft 351 at the top, and the installation and fixing modes of the second upper positioning shaft 351 are same as those of the press-in press head 240. The lower end of the extrusion press head 350 is connected with the tail end of the rod part of the rivet 600 through an extrusion connecting piece 360. When the test is performed, the lower pressing beam 110 moves upward or the workbench 120 moves downward, the axial pressure is applied to the extrusion connecting piece 360 through the extrusion press head 350, until the rivet 600 is extruded, and the displacement-extrusion force curve is recorded synchronously.
[0041] The system can complete the press-in force and the static extrusion force of the connection point in the rivet 600 assembly process by using the same pressure testing machine 100 through the modular tool design and the standardized interface, the operation is simple, and the data is reliable.
[0042] The protection scope of the utility model includes but is not limited to the above implementation, the protection scope of the utility model is subject to the claims, any replacement, deformation, improvement of the technical personnel in the art to the present technology easily thought of falls into the protection scope of the utility model.
Claims
1. A rivet press-in force and press-out force detection system, comprising a pressure testing machine (100), a force sensor and a displacement acquisition module are integrated in the pressure testing machine (100), the pressure testing machine (100) comprises a workbench (120) and a liftable lower pressing beam (110), the upper end of the workbench (120) is provided with a lower mounting part (121), and the lower end of the lower pressing beam (110) is provided with an upper mounting part (111); characterized in that, The system further comprises a press-in detection tool and a press-out detection tool, which are selectively and detachably installed on the pressure testing machine (100); The press-in detection tool comprises a press-in positioning seat (210) and a press-in ram (240), the press-in positioning seat (210) is installed on the lower mounting part (121), and the press-in ram (240) is installed on the upper mounting part (111); the press-in positioning seat (210) is used for positioning a rivet (600) to be pressed in with the front face of a riveting plate (700) upward, and the press-in ram (240) is used for pressing the rivet (600) into the riveting plate (700), and the pressure testing machine (100) collects the press-in force in real time during the pressing-in process; The press-out detection tool comprises a press-out positioning seat (310), a press-out ram (350) and a press-out connecting piece (360), the press-out positioning seat (310) is installed on the lower mounting part (121), and the press-out ram (350) is installed on the upper mounting part (111); the press-out positioning seat (310) is used for clamping the riveting plate (700) with the rivet (600) assembled on the riveting plate (700) with the back face of the riveting plate (700) upward, one end of the press-out connecting piece (360) is connected with the shank of the rivet (600), the other end of the press-out connecting piece (360) is matched with the press-out ram (350), the press-out ram (350) applies an axial press-out force to the rivet (600) through the press-out connecting piece (360) to make the rivet (600) separate from the riveting plate (700), and the pressure testing machine (100) collects the press-out force in real time during the press-out process.
2. The rivet push-in force and push-out force detection system according to claim 1, characterized by, The upper end surface of the lower mounting part (121) is provided with a lower mounting hole in the center, the bottom of the press-in positioning seat (210) is provided with a first lower positioning shaft (212) which is inserted and matched with the lower mounting hole, and the bottom of the press-out positioning seat (310) is provided with a second lower positioning shaft (312) which is inserted and matched with the lower mounting hole.
3. The rivet push-in force and push-out force detection system according to claim 1, characterized by, The lower end surface of the upper mounting part (111) is provided with an upper mounting hole in the center, and the sidewall of the upper mounting part (111) is provided with a radial through fixing hole (112); the top of the press-in ram (240) is provided with a first upper positioning shaft (241) which is inserted and matched with the upper mounting hole, and the top of the press-out ram (350) is provided with a second upper positioning shaft (351) which is inserted and matched with the upper mounting hole; the first upper positioning shaft (241) and the second upper positioning shaft (351) are both provided with a pin hole (242) corresponding to the fixing hole (112), and a fixing pin (400) passes through the fixing hole (112) and the corresponding pin hole (242) to realize locking.
4. The system for detecting the press-in force and the press-out force of a rivet according to claim 3, characterized by The lower end of the first upper positioning shaft (241) and the lower end of the second upper positioning shaft (351) are both screwed with a locking nut (500), and the top surface of the locking nut (500) abuts against the bottom surface of the upper mounting part (111) when tightened, so as to axially fix the press-in ram (240) or the press-out ram (350).
5. The rivet push-in force and push-out force detection system according to claim 1, characterized by, The press-in positioning seat (210) comprises a press-in seat body (211), a guide block (220) and a limiting block (230); the guide block (220) is embedded in the press-in seat body (211) and is provided with a guide hole (221) in the middle for the rod part of the rivet (600) to pass through; the limiting block (230) is provided with two symmetrically distributed limiting protrusions (231) on the upper end surface for stopping and positioning the riveting plate (700).
6. The rivet push-in force and push-out force detection system according to claim 1, characterized by The press-out positioning seat (310) comprises a press-out seat body (311), an abutting block (320), a clamping block (330) and a locking sleeve (340); the abutting block (320) is provided with a counterbore (321) in the middle for accommodating the head part of the rivet (600); the clamping block (330) is provided with a reverse T-shaped through slot (331) on the upper end surface, which is through in the insertion direction of the riveting plate (700), and the reverse T-shaped through slot (331) is formed by the upper end surface of the clamping block (330) and the clamping flanges (332) protruding upward on both sides; the clamping block (330) is provided with an outer flange (333) on the bottom, the locking sleeve (340) is provided with an inner flange (341) on the inner wall, which cooperates with the outer flange (333), and the locking sleeve (340) is threadedly connected with the press-out seat body (311); after the riveting plate (700) is inserted into the reverse T-shaped through slot (331), it is clamped and fixed by the lower surface of the clamping flange (332) and the upper end surface of the abutting block (320).