Rivet pulling type rivet automatic assembling mechanism

Abstract

The invention provides an automatic rivet pulling type rivet assembling mechanism which comprises an indexing rotary disc, a pushing and pressing bush assembling station, a locking ring assembling station, a rivet sleeve assembling station, a core rod assembling station, a press-fitting station and a discharging station, the pushing and pressing bush assembling station, the locking ring assembling station, the rivet sleeve assembling station, the core rod assembling station, the press-fitting station and the discharging station are sequentially arranged above the indexing rotary disc in the circumferential direction, and the pushing and pressing bush assembling station is used for feeding a pushing and pressing bush; the rivet sleeve assembly station is used for feeding a rivet sleeve, the core rod assembly station is used for feeding a core rod, the press-fitting station is used for press-fitting a pushing bush, a locking ring, the rivet sleeve and the core rod and judging whether a press-fitted product is qualified or not, and the discharging station is used for placing the press-fitted product to a corresponding position. According to the automatic assembling mechanism for the pull riveting type rivet, automatic feeding, assembling and automatic positioning and press fitting work of four parts including a core rod, a rivet body, a locking ring and a pushing bush can be achieved, full-automatic operation can be achieved, and the problem that the error rate is high due to many manual operations in the existing assembly process of the pull riveting type rivet is solved.

Description

Technical Field

[0001] The invention belongs to the field of fastener processing, and in particular relates to a rivet-type nail-pulling automatic assembly mechanism. Background Art

[0002] As aerospace vehicles have been developing towards lightweight and compact structures, composite materials account for an increasing proportion of aircraft. Due to the interlayer characteristics and potential corrosion characteristics of composite materials that are different from metal materials, and the compact structure design brings more closed parts, traditional fasteners are not suitable for connecting these materials and structures.

[0003] The bulge-drawing nail has a large bulge foot area formed on the blind end plate after riveting, which increases the tensile stress surface and is not easy to damage the hole wall and hole mouth of the composite material that has strict requirements on fasteners. Moreover, since it is a full titanium alloy material, it has good potential compatibility with the composite material structure and will not cause potential corrosion of the composite material. It is especially suitable for the single-sided connection of metal materials and composite materials on aircraft. In addition, it has the advantages of high shear strength, mechanical self-locking, quick and convenient installation, flush fracture after riveting without grinding, meeting the 7° inner bevel installation, and light weight. It is widely used in the riveting of metal materials and composite materials of various types of helicopters and aircraft. The blister nail extraction assembly consists of four parts: a core rod, a nail sleeve, a locking ring, and a push bushing. The current assembly process requirements for the pull riveting nail extraction are as follows: 1. First, insert the core rod into the nail sleeve hole and press it; 2. Pass the locking ring through the core rod and press it into the nail sleeve locking ring stop; 3. Pass the push bushing through the core rod and press it into the push bushing ring groove with a certain pressure to form an interference fit. The pressing force and the pressing position are allowed to be completed with special tools and positioning tooling, and the installation direction of the push bushing must be correct during the installation process. The existing manual assembly has many manual operation steps, especially the overall pressing after inserting the push set requires precise control of the pressure and the amount of pressing. Manual assembly has the problems of over-installation and inadequate installation. At the same time, the consistency of manual assembly dimensions is difficult to effectively control. In addition, due to the lack of effective monitoring of the manual assembly process, there is a potential risk of reversed push bushing and missed assembly of the locking ring. In particular, missed assembly of the locking ring will be difficult to effectively identify and eliminate, which will have an adverse effect on the subsequent riveting of composite structures. Summary of the invention

[0004] In view of this, the present invention aims to provide an automatic assembly mechanism for pull-riveted rivets to solve the problem of high error rate caused by many manual operations in the existing pull-riveted rivet assembly process.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A pull-riveting type automatic assembly mechanism comprises a dividing turntable and a pushing bushing assembly station, a locking ring assembly station, a nail sleeve assembly station, a core rod assembly station, a pressing station and a blanking station which are arranged in circumferential order above the dividing turntable. The pushing bushing assembly station is used for loading a pushing bushing, the locking ring assembly station is used for loading a locking ring, the nail sleeve assembly station is used for loading a nail sleeve, the core rod assembly station is used for loading a core rod, the pressing station is used for pressing the pushing bushing, the locking ring, the nail sleeve and the core rod and judging whether the pressed product is qualified, and the blanking station is used for placing the pressed product to a corresponding position.

[0007] Furthermore, the push bushing assembly station, the lock ring assembly station, the nail sleeve assembly station, the core rod assembly station, the press-fitting station and the blanking station are evenly distributed on the indexing plate.

[0008] Furthermore, the dividing plate includes a turntable, a loading platform for placing materials is installed above the turntable, and the bottom is connected to the push rod drive through the push rod shaft. The push rod drive can drive the push rod shaft to rotate axially. A fixed plate is also provided below the turntable, and a through hole is provided in the middle of the fixed plate for passing the push rod shaft. The push rod shaft is used to realize the guiding positioning of the parts.

[0009] Furthermore, corresponding assembly devices are respectively installed on the pushing bushing assembly station, locking ring assembly station, nail sleeve assembly station, core rod assembly station, pressing station and unloading station, which are respectively an automatic feeding device for pushing bushing, an automatic feeding device for locking ring, an automatic feeding device for nail sleeve, an automatic feeding device for core rod, a pressing device and an unloading device.

[0010] Furthermore, the push sleeve automatic feeding device includes a push sleeve feeding unit for feeding, a push sleeve feeding unit and a push sleeve incoming material detection unit; the lock ring automatic feeding device includes a lock ring feeding unit, a lock ring loading unit and a lock ring incoming material detection unit; the core rod automatic feeding device includes a core rod feeding unit, a core rod loading unit and a core rod incoming material detection unit.

[0011] Furthermore, the push bushing incoming material detection unit, the lock ring incoming material detection unit, the core rod incoming material detection unit and the nail sleeve incoming material detection unit are the same, all of which are used to detect incoming materials and are infrared sensors.

[0012] Furthermore, the push sleeve loading unit, lock ring loading unit, core rod loading unit and unloading unit are the same. The push sleeve loading unit includes an XY module, a clamping cylinder and a clamping claw. The clamping cylinder is fixedly installed under the XY module, and the clamping claw is installed under the clamping cylinder. The clamping cylinder is used to control the opening and closing of the clamping claw to clamp the material. The signals of the XY module and the clamping cylinder are both connected to the control system.

[0013] Furthermore, the unloading device includes an unloading unit and a qualified product box and a failed product box arranged on one side thereof. The unloading unit can put qualified rivet-type nail products into the qualified product box and unqualified rivet-type nails into the failed product box.

[0014] Furthermore, the pressing device includes a pressure sensor, a servo electric cylinder and a pressing plate installed on one side thereof. The pressure sensor signal is connected to the control system to monitor whether the core rod pressing process is qualified. The pressing plate is driven by the servo electric cylinder to press the core rod.

[0015] Furthermore, the push bushing assembly station, lock ring assembly station, nail sleeve assembly station, core rod assembly station, press fitting station and unloading station are all provided with a material detection unit, which is used to detect whether the material size, quantity and installation position meet the requirements; the material detection unit is a sensor or multiple sensors working together.

[0016] Compared with the prior art, the pull-rivet type nail-pulling automatic assembly mechanism of the present invention has the following advantages:

[0017] (1) The pull-type rivet automatic assembly mechanism described in the present invention can realize the automatic loading, assembly and automatic positioning and pressing of the four parts of the core rod, the rivet body, the locking ring and the push bushing. It can be fully automatic, avoiding the labor intensity and low efficiency of manual operation, and solves the problem of high error rate caused by many manual operations in the existing pull-type rivet assembly process.

[0018] (2) The pull-rivet type rivet-pulling automatic assembly mechanism described in the present invention adopts a modular design for each workstation, which is convenient for changing and adjusting and for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of a top view of a pull-rivet type nail-pulling automatic assembly mechanism according to an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of a push bushing feeding unit according to an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of a press-fitting device according to an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of a dividing plate according to an embodiment of the present invention;

[0024] Figure 5A side view of the indexing plate according to an embodiment of the present invention;

[0025] Figure 6 It is a schematic diagram of a pull-rivet type nail-pulling automatic assembly mechanism according to an embodiment of the present invention;

[0026] Figure 7 It is a schematic diagram of a pull-rivet type nail-pulling structure according to an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1-push bushing automatic feeding device; 11-XY module; 12-clamping cylinder; 13-clamping claw; 2-locking ring automatic feeding device; 3-nail sleeve automatic feeding device; 4-core rod automatic feeding device; 5-pressing device; 51-servo electric cylinder; 6-unloading device; 7-dividing plate; 71-elevator shaft; 72-turntable; 73-fixed plate; 74-elevator drive; 75-stage. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0033] A pull-rivet type nail-drawing automatic assembly mechanism, such as Figures 1 to 6 As shown, it includes a dividing turntable 7 and a pushing bushing assembly station, a locking ring assembly station, a nail sleeve assembly station, a core rod assembly station, a pressing station and a blanking station arranged in sequence in the circumferential direction above the dividing turntable 7. The pushing bushing assembly station is used for loading the pushing bushing, the locking ring assembly station is used for loading the locking ring, the nail sleeve assembly station is used for loading the nail sleeve, the core rod assembly station is used for loading the core rod, the pressing station is used for pressing the pushing bushing, the locking ring, the nail sleeve and the core rod and judging whether the pressed product is qualified, and the blanking station is used for placing the pressed product to the corresponding position.

[0034] Preferably, there are 6 workstations, which are evenly distributed on the dividing plate.

[0035] The indexing plate 7 includes a rotating plate 72, a loading platform 75 for placing materials is fixedly installed above the rotating plate 72, and the lower part of the rotating plate 72 is connected to the push rod drive 74 through the push rod shaft 71, so that the push rod drive 74 can drive the push rod shaft 71 to rotate axially, and a fixed plate 73 is also provided below the rotating plate 72, and a through hole for passing the push rod shaft 71 is provided in the middle of the fixed plate 73, and the push rod shaft 71 is used to achieve the guiding and positioning of the parts. Preferably, the push rod drive 74 is a motor and the signal is connected to the control system, and the rotation angle and speed can be set by the control system.

[0036] In order to improve work efficiency, in one or more embodiments, the number of the loading platforms is 2.

[0037] Corresponding assembly devices are installed on the push bushing assembly station, lock ring assembly station, nail sleeve assembly station, core rod assembly station, press fitting station and blanking station, respectively, which are a push bushing automatic feeding device 1, a lock ring automatic feeding device 2, a nail sleeve automatic feeding device 3, a core rod automatic feeding device 4, a press fitting device 5 and a blanking device 6.

[0038] The automatic feeding device 1 for pushing bushings comprises a feeding unit for pushing bushings, a feeding unit for pushing bushings and a material detection unit for pushing bushings. The feeding unit for pushing bushings comprises a vibration plate with a direction selection function, a straight vibration material channel, a material pushing and material dividing mechanism, and the feeding unit for pushing bushings can be an existing device with the above functions.

[0039] The lock ring automatic feeding device 2 includes a lock ring feeding unit, a lock ring feeding unit and a lock ring incoming material detection unit. The lock ring feeding unit includes a vibration plate with lock ring separation function, a straight vibration material channel, a material pusher and a material separation mechanism, and the lock ring feeding unit can be an existing device with the above functions.

[0040] The core rod automatic feeding device 4 includes a core rod feeding unit, a core rod feeding unit and a core rod incoming material detection unit. The core rod feeding unit includes a vibration plate, a straight vibration material channel, a material pusher and a material dividing mechanism, and the core rod feeding unit can be an existing device with the above functions.

[0041] The unloading device 6 includes an unloading unit and a qualified product box and a failed product box arranged on one side thereof. The unloading unit can put qualified rivet-type pull-out nail products into the qualified product box and unqualified rivet-type pull-out nails into the failed product box.

[0042] The push bushing loading unit, the lock ring loading unit, the core rod loading unit and the unloading unit are the same, and their functions are to move materials. They are loaded or unloaded according to the actual application scenario. The above units are exactly the same, which greatly saves production costs in terms of equipment acquisition, equipment debugging and precision calibration, and keeps the consistency of the pull rivet type nail automatic assembly mechanism highly consistent. The push bushing loading unit includes an XY module 11, a clamping cylinder 12 and a clamping claw 13. The clamping cylinder 12 is fixedly installed under the XY module 11, and the clamping claw 13 is installed under the clamping cylinder 12. The clamping cylinder 12 is used to control the opening and closing of the clamping claw 13 to clamp the material. The XY module 11 is used to move the clamping claw 13 to a set position, so that the clamping claw 13 can clamp the material accurately. The signals of the XY module 11 and the clamping cylinder 12 are both connected to the control system.

[0043] The press-fitting device 5 includes a pressure sensor, a servo electric cylinder 51 and a pressing plate installed on one side thereof. The pressure sensor signal is connected to the control system to monitor whether the core rod press-fitting process is qualified. The pressing plate is driven by the servo electric cylinder 51 to press the core rod. The displacement of the servo electric cylinder 51 is controlled by the control system.

[0044] The nail sleeve automatic feeding device 3 includes a nail sleeve feeding unit and a nail sleeve incoming material detection unit. The nail sleeve feeding unit is a flexible feeding unit with high-level process protection capability, including a four-axis robot grasping structure using visual recognition of nail body posture and an object posture flipping structure, and any existing equipment with this function can be used.

[0045] The push bushing incoming material detection unit, lock ring incoming material detection unit, core rod incoming material detection unit and nail sleeve incoming material detection unit are the same, all used to detect incoming materials and are infrared sensors. The push bushing assembly station, lock ring assembly station, nail sleeve assembly station, core rod assembly station, press fitting station and unloading station are all equipped with material detection units, which can detect whether the material size, quantity and installation position meet the requirements; the material detection unit can be a sensor or multiple sensors can be set to cooperate according to needs.

[0046] The working principle of a pull-rivet type automatic assembly mechanism is as follows:

[0047] The control system controls the indexing plate 7 to rotate the stage 75 to the bottom of the push bushing automatic feeding device 1, the lock ring automatic feeding device 2, the nail sleeve automatic feeding device 3, the core rod automatic feeding device 4, the press-fitting device 5 and the unloading device 6 in sequence, which are used to receive the push bushing, the lock ring, the nail sleeve and the core rod, and then rotate to the bottom of the press-fitting device 5, the press-fitting device 5 presses the above components into an integrated finished product, and the pressure sensor of the press-fitting device 5 transmits data to the control system, and the control system determines whether the pressed finished product is qualified, and then transmits the information to the unloading device 6, and the indexing plate 7 continues to rotate until it is located at the unloading device 6, and the unloading device 6 puts the finished product into a qualified product box or a unqualified product box according to the command of the control system. The control system adopts a PLC control system in conjunction with an industrial computer. All assembly information is automatically saved, and parameter setting and calling can be realized. There are two modes of automatic and manual debugging. It has a network interface, and processing data and status can be uploaded in real time.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pull-rivet type automatic assembly mechanism, characterized in that: It includes a dividing turntable and a pushing bushing assembly station, a locking ring assembly station, a nail sleeve assembly station, a core rod assembly station, a pressing station and a unloading station which are arranged in circumferential order above the dividing turntable. The pushing bushing assembly station is used for loading the pushing bushing, the locking ring assembly station is used for loading the locking ring, the nail sleeve assembly station is used for loading the nail sleeve, the core rod assembly station is used for loading the core rod, the pressing station is used for pressing the pushing bushing, the locking ring, the nail sleeve and the core rod and judging whether the pressed product is qualified, and the unloading station is used for placing the pressed product to the corresponding position.

2. The rivet type automatic assembly mechanism according to claim 1, characterized in that: The push bushing assembly station, the lock ring assembly station, the nail sleeve assembly station, the core rod assembly station, the press assembly station and the blanking station are evenly distributed on the indexing plate.

3. The rivet type automatic assembly mechanism according to claim 1, characterized in that: The dividing plate includes a turntable, a loading platform for placing materials is installed above the turntable, and the bottom is connected to the push rod drive through the push rod shaft. The push rod drive can drive the push rod shaft to rotate axially. A fixed plate is also provided below the turntable. A through hole is provided in the middle of the fixed plate for passing the push rod shaft. The push rod shaft is used to achieve the guiding positioning of the parts.

4. The rivet type automatic assembly mechanism according to claim 1, characterized in that: Corresponding assembly devices are installed on the push bushing assembly station, lock ring assembly station, nail sleeve assembly station, core rod assembly station, press fitting station and blanking station, respectively, which are a push bushing automatic feeding device, a lock ring automatic feeding device, a nail sleeve automatic feeding device, a core rod automatic feeding device, a press fitting device and a blanking device.

5. The pull-rivet type nail-pulling automatic assembly mechanism according to claim 4 is characterized in that: The automatic feeding device for pushing bushings includes a pushing bushing feeding unit for feeding, a pushing bushing loading unit and a pushing bushing incoming material detection unit; the automatic feeding device for locking rings includes a locking ring feeding unit, a locking ring loading unit and a locking ring incoming material detection unit; the automatic feeding device for core rods includes a core rod feeding unit, a core rod loading unit and a core rod incoming material detection unit.

6. The rivet type automatic assembly mechanism according to claim 5, characterized in that: The push bushing incoming material detection unit, the lock ring incoming material detection unit, the core rod incoming material detection unit and the nail sleeve incoming material detection unit are the same, all of which are used to detect incoming materials and are infrared sensors.

7. The rivet-type automatic assembly mechanism according to claim 5, characterized in that: The push sleeve loading unit, lock ring loading unit, core rod loading unit and unloading unit are the same. The push sleeve loading unit includes an XY module, a clamping cylinder and a clamping claw. The clamping cylinder is fixedly installed under the XY module, and the clamping claw is installed under the clamping cylinder. The clamping cylinder is used to control the opening and closing of the clamping claw to clamp the material. The signals of the XY module and the clamping cylinder are connected to the control system.

8. The pull-rivet type nail-pulling automatic assembly mechanism according to claim 1, characterized in that: The unloading device comprises an unloading unit and a qualified product box and a failed product box arranged on one side thereof. The unloading unit can put qualified rivet-type pull-out nail products into the qualified product box and put failed rivet-type pull-out nails into the failed product box.

9. The rivet-type automatic assembly mechanism according to claim 1, characterized in that: The pressing device includes a pressure sensor, a servo electric cylinder and a pressing plate installed on one side. The pressure sensor signal is connected to the control system to monitor whether the core rod pressing process is qualified. The pressing plate is driven by the servo electric cylinder to press the core rod.

10. The rivet type automatic assembly mechanism according to claim 1, characterized in that: The push bushing assembly station, lock ring assembly station, nail sleeve assembly station, core rod assembly station, press assembly station and unloading station are all equipped with material detection units, which are used to detect whether the material size, quantity and installation position meet the requirements; the material detection unit is a sensor or multiple sensors working together.

Images