Mixed-mode loading tests for determining the mechanical properties of clinched joints with an additional rivet used in the assembly of thin-walled structures

Mucha, J.; Boda, Łukasz; Poręba, M.; Witkowski, Waldemar

doi:10.1016/j.tws.2023.110965

Cited by 7 publications

(8 citation statements)

References 46 publications

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“…The measurement load was 10 N (in accordance with the ISO 6507-1:2018 standard [59]). The characteristics of the rivets have been presented in other papers [25,28].…”

Section: Sheet Materialsmentioning

confidence: 99%

“…By reducing the distance of the joint from the edge of the sheet, the forming force and, consequently, the demand for forming energy can be reduced. Another way to reduce the energy absorption of the joint formation process is to use a rivet of a different hardness [28], use a tubular rivet [25], or change the insertion depth of the rivet [61].…”

Section: Forming Process Of the Clinch-rivet Jointmentioning

confidence: 99%

“…The joining of a composite and a metal using a punching rivet and heating to 180 Automotive manufacturers are increasingly using pressed-joining technologies. This group of connecting technologies includes, among others, self-piercing riveting ("SPR") [8][9][10][11], clinching ("CL") [12][13][14][15][16][17], solid self-piercing riveting ("SSPR") [18][19][20][21][22][23], and clinch riveting ("CR") [24][25][26][27][28][29]. Companies see more and more potential for this group of pressed joints.…”

Section: Introductionmentioning

confidence: 99%

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Steel Sheet Deformation in Clinch-Riveting Joining Process

Witkowski,

Mucha,

Boda

2024

Metals

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This paper presents the deformation of a joined sheet after the clinch riveting process. The DX51D steel sheet with zinc coating was used. The samples to be joined with clinch riveting technology had a thickness of 1 ± 0.05 mm and 1.5 ± 0.1 mm. The sheet deformation was measured before and after the joining process. The rivet was pressed in the sheets with the same dimension between the rivet axis and three sheet edges: 20, 30, and 40 mm. For fixed segments of the die, from the rivet side close to the rivet, the sheet deformation was greater than that of the area with movable segments. The movement of the die’s sliding element caused more sheet material to flow in the space between the fixed part of the die and movable segments. Hence, the sheet deformation in these places was smaller than for the die’s fixed element—the sheet material was less compressed. For sheet thickness values of 1.5 mm and a width value of 20 mm, the bulk of the sheet was observed. For a sheet width of 20 mm, it was observed that the deformation of the upper and lower sheets in the area of the rivet was greater than for sheet width values of 30 or 40 mm.

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“…The measurement load was 10 N (in accordance with the ISO 6507-1:2018 standard [59]). The characteristics of the rivets have been presented in other papers [25,28].…”

Section: Sheet Materialsmentioning

confidence: 99%

Section: Forming Process Of the Clinch-rivet Jointmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Steel Sheet Deformation in Clinch-Riveting Joining Process

Witkowski,

Mucha,

Boda

2024

Metals

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“…The differences between the forming force and the energy consumption for the two varieties of the hole in the rivet are at a similar level. The mechanical characteristics of the rivet influence the reduction of the forming force-displacement diagram course and the increase of the maximum force [54].…”

Section: Analysis Of the Energy Consumption Of The Forming Processesmentioning

confidence: 99%

The energy consumption of the process of joining steel sheets with the use of clinching with and without an additional rivet, and analysis of sheet deformation and mechanical strength of joints

Mucha

Boda

Witkowski

2023

Preprint

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In the case of thin-walled structures, the geometric accuracy of the products is particularly important. The implementation of the parts joining process requires various tools and technological equipment. For clinching joints, their geometric quality, energy requirement of the forming process, and joint load capacity are very important issues. Clinching technology has been used for at least two decades, and research is still being conducted to improve it. This paper presents the results of research on the impact of process modification, i.e., the use of different tools and the shape of the additional rivet, on the joint geometrical quality, the energy consumption of the forming process, distortion of the DX51D + Z/275 steel samples, and the load capacity of the joints. The research was carried out using three different sets of tools. The effect of changing the shape of the rivet (the hole and its diameter and depth) on the reduction of the forming force and the energy consumption of the joining process was analysed. For joints made with different tools and with an additional rivet, an analysis of the size of the sheet deviation was performed. Changes in the geometric structure of the joint interlock and changes in the surface flatness of the sheets in the area of the joint axis were observed. The impact of the proposed rivet modification on the change in the effectiveness of the forming process was determined. Identification of the strength of the joints was also carried out in the shear test of the lap joint. The energy consumption up to fracture was calculated. It has been found that it is possible to significantly increase the joint load capacity and reduce the forming force of the clinch-rivet joints.

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“…The formation of clinch-rivet joints can be performed using full deformable steel rivets of various hardness values [20]. The authors of work [20] presented the results of research on the influence of different hardness values of rivets (350HV1, 400HV1, 420HV1) on the forming force, geometric parameters and load capacity of the joint for steel sheets.…”

Section: Introductionmentioning

confidence: 99%

Performance Tests of HX340 Microalloyed Steel Sheets Joined Using Clinch-Rivet Technology

Boda,

Mucha,

Witkowski

2024

Materials

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This paper presents the possibility of forming a pressed joint between two 1.5 mm thick sheets made of HX340 steel. The joint was formed using an additional deformable steel rivet with a hardness of 400HV1. Different distances of rivet pressing below the initial surface of the upper sheet were chosen: 0, 0.15, 0.30, 0.45 and 0.60 (in mm). For the mentioned rivet-pressing distances, forming tests were performed using an “SKB” die with three die depths: 1.45, 1.60 and 1.75 (in mm). Observations and measurements of the characteristic geometric dimensions of the interlock were made. Furthermore, the strength of the clinch-riveted joints was analysed. Changing the depth of the die by 20%, i.e., from hd = 1.45 mm to hd = 1.75 mm for the same rivet press-in depth (of = 0%), resulted in a 12% reduction in the forming-force value. The maximum load capacity of the joint in the shear test decreased by 3.5% for the mentioned joint variant. The greater the rivet press-in depth used in the joint (of), the greater the value of the interlock size (tu). Increasing the value of rivet-pressing depth below the initial surface of the upper sheet from 0 mm to 0.6 mm resulted in an increase in the size of the interlock (tu) by 136% (for hd = 1.45 mm), by 128% (for hd = 1.60 mm) and by 85% (for hd = 1.75 mm).

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Mixed-mode loading tests for determining the mechanical properties of clinched joints with an additional rivet used in the assembly of thin-walled structures

Cited by 7 publications

References 46 publications

Steel Sheet Deformation in Clinch-Riveting Joining Process

Steel Sheet Deformation in Clinch-Riveting Joining Process

The energy consumption of the process of joining steel sheets with the use of clinching with and without an additional rivet, and analysis of sheet deformation and mechanical strength of joints

Performance Tests of HX340 Microalloyed Steel Sheets Joined Using Clinch-Rivet Technology

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