Self-resistance heating hammer riveting device

Abstract

The invention relates to a self-resistance heating hammer riveting device which comprises a power supply control cabinet (16), a cable I (7), a cable II (8), jacking iron (5), a metal clamp (9) and a temperature measuring device (11), the two ends of the cable II (8) are connected with the positive electrode of the power supply control cabinet (16) and the metal clamp (9) respectively, and a workpiece I (1) and a rivet rod (3) are in a contact state; after a power supply is switched on, the power supply control cabinet (16), the cable I (7), the jacking iron (5), the rivet rod (3), the workpiece I (1) and the metal clip (9) form a power supply loop; the temperature measuring device (11) is installed at the position close to the rivet and monitors the temperature of the rivet in real time, and when the preset temperature is reached, an operator is prompted to start riveting. The process requirement for carrying out riveting work in the optimal plastic stage can be met, the riveting requirement under the manual hammer riveting condition is met, the temperature in the operation process is controllable, and the quality is reliable.

Description

Technical Field

[0001] The invention relates to a self-resistance heating hammer riveting device, belonging to the technical field of riveting. Background Art

[0002] In recent years, domestic aviation equipment products have developed rapidly. In order to adapt to high temperature and high strength working conditions, the connection methods of airframe structures have been continuously innovated and developed. Titanium alloy rivets have become the main choice of riveting fasteners for hypersonic aircraft airframe structures due to their high temperature resistance and shear resistance and tensile resistance at high temperatures. Titanium alloy rivets generally have the characteristics of poor plasticity and strong brittleness at room temperature. Most titanium alloy rivets cannot be hammer-riveted at room temperature, and there is a lack of reliable hammer-riveting devices and methods for titanium alloy rivets.

[0003] Hammer riveting is a method of forming a pier head by means of the impact force of the rivet gun and the impact of the top handle. In the aviation manufacturing industry, manual riveting equipment is mainly pneumatic riveting guns. The rivet gun is connected to an industrial air source (0.6Mpa~0.8Mpa) during operation, and the air pressure drives the internal mechanism to output a rhythmic telescopic movement to form a hammer riveting power. In the actual riveting process, a second person uses special equipment to hold the nail rod to form a pier head.

[0004] Research has shown that different types of titanium alloy rivets have their best temperature range for plasticity. The process of forming the pier head within this temperature range is more labor-saving and is the best time for hammer riveting. Summary of the invention

[0005] In view of the technical problems that titanium alloy rivets have low plasticity at room temperature, poor riveting processability, and are prone to cracks, breakage, etc., the present invention designs a method for heating the riveted objects during the riveting process to achieve optimal riveting plasticity, thereby improving the riveting processability of titanium alloy rivets and achieving riveting quality and riveting connection solutions.

[0006] The present invention is achieved by the following technical solutions:

[0007] A self-resistance heating hammer riveting device comprises a power control cabinet 16, a cable I7, a cable II8, a top iron 5, a metal clamp 9, and a temperature measuring device 11, wherein the two ends of the cable II8 are respectively connected to the "positive pole" of the power control cabinet 16 and the metal clamp 9, and the two ends of the cable I7 are respectively connected to the "negative pole" of the power control cabinet and the top iron 5; the power control cabinet 16 transmits voltage to the rivet rod 3 via the cable I7 and the top iron 5; the power control cabinet 16 transmits voltage to the workpiece I1 via II8 and the metal clamp 9, and the workpiece I1 and the rivet rod 3 are in contact; after the power is turned on, the power control cabinet 16, the cable I7, the top iron 5, the rivet rod 3, the workpiece I1 and the metal clamp 9 form a power circuit;

[0008] The temperature measuring device 11 is installed near the rivet to monitor the rivet temperature in real time. When the predetermined temperature is reached, the operator is prompted to start riveting.

[0009] A manual power switch 10 is provided on the riveting gun structure for easy control during the riveting process. The switch is connected to the power control cabinet 16 via the power interface 13 and the cable III14 to directly control the start and pause of the power control cabinet.

[0010] Furthermore, the temperature measuring device 11 is non-contact, and when a predetermined temperature is reached, a signal is fed back to the buzzer alarm system to prompt the operator to start riveting.

[0011] The present invention is a very simple auxiliary riveting equipment. Without changing the use of traditional pneumatic tool hammer riveting, it realizes the heating temperature control of titanium alloy rivets, can meet the process requirements of riveting work in the optimal plasticity stage, and meet the riveting needs under manual hammer riveting conditions. The temperature of the operation process is controllable and the quality is reliable. It can be widely used in titanium alloy rivet riveting assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the working principle of a self-resistance heating hammer riveting device of the present invention. DETAILED DESCRIPTION

[0013] like Figure 1 As shown, the present invention is a self-resistance heating hammer riveting device, comprising:

[0014] 1) Self-resistance heating device: The self-resistance heating device is mainly composed of a power control cabinet 16, a cable I7, a cable II8, a top iron 5 and a metal clamp 9. The power control cabinet can output the input 220V voltage as 3V, 4V or 5V according to different requirements; the two ends of the cable II8 are respectively connected to the "positive pole" of the power control cabinet 16 and the metal clamp 9, and the two ends of the cable I7 are respectively connected to the "negative pole" of the power control cabinet and the top iron 5; the power control cabinet 16 transmits the voltage to the rivet rod 3 via the cable I7 and the top iron 5; the power control cabinet 16 transmits the voltage to the workpiece I1 via II8 and the metal clamp 9, and the workpiece I1 and the rivet rod 3 are in contact; after the power is turned on, the power control cabinet 16, the cable I7, the top iron 5, the rivet rod 3, the workpiece I1 and the metal clamp 9 form a power circuit.

[0015] 2) Temperature feedback mechanism: A non-contact temperature measuring device 11 is designed near the rivet to monitor the rivet temperature in real time. When the predetermined temperature is reached, a signal is fed back to the buzzer alarm system to prompt the operator to start riveting.

[0016] 3) Heating control switch: A manual power switch 10 is set on the riveting gun structure for easy control during the riveting process. The switch is connected to the power control cabinet 16 via the power interface 13 and the cable III14 to directly control the start and pause of the power control cabinet. When a high temperature appears on site or reheating is required, the switch can be directly used for control without the need for a third person to operate the power control cabinet. On the one hand, emergency handling of sudden accidents can be achieved, and on the other hand, manpower investment can be saved and efficiency can be improved.

[0017] The working principle of the self-resistance heating hammer riveting device of the present invention is as follows:

[0018] Implementation process:

[0019] 1) Prepare workpieces I1 and II2, complete the rivet hole making work, and remove burrs.

[0020] 2) Connect the air source inlet 12 of the riveting gun 17 to the power air source.

[0021] 3) Use cable III14 to connect the power interface 13 of the riveting gun 17 and the control cabinet 16.

[0022] 2) Use the metal clamp 9 to clamp the workpiece I1.

[0023] 3) Input 220V voltage through cable IV15, turn on the power supply of power control cabinet 16, check that the heating is normal, and turn off the power supply.

[0024] 4) Turn on the temperature measuring device 11 and check whether the temperature measuring function is normal.

[0025] 5) Place the rivets into the holes made in workpieces I1 and II2, and use the push iron 5 and the rivet gun shell 6 to respectively support the rivet rod 3 and the rivet head 4.

[0026] 6) Use the switch 10 on the riveting gun to control the power supply to turn on, and when the temperature measuring device 11 buzzes the device to alarm, rivet the rivets.

[0027] 7) Complete all rivet riveting tasks on workpiece I1 and workpiece II2 in sequence.

[0028] Through the above steps, the rivet temperature can be accurately controlled, the best plasticity timing can be grasped, the riveting processability can be improved, the riveting work of titanium alloy rivets can be completed, and the riveting efficiency and one-time success rate can be improved.

Claims

1. A self-resistance heating hammer riveting device, characterized in that: The invention comprises a power control cabinet (16), a cable I (7), a cable II (8), a top iron (5), a metal clamp (9) and a temperature measuring device (11), wherein two ends of the cable II (8) are respectively connected to the "positive pole" of the power control cabinet (16) and the metal clamp (9), and two ends of the cable I (7) are respectively connected to the "negative pole" of the power control cabinet and the top iron (5); the power control cabinet (16) transmits voltage to the rivet rod (3) via the cable I (7) and the top iron (5); the power control cabinet (16) transmits voltage to the workpiece I (1) via II (8) and the metal clamp (9), and the workpiece I (1) and the rivet rod (3) are in contact; After the power supply is turned on, the power supply control cabinet (16), the cable I (7), the top iron (5), the rivet rod (3), the workpiece I (1) and the metal clamp (9) form a power supply circuit; The temperature measuring device (11) is installed near the rivet to monitor the rivet temperature in real time, and when the predetermined temperature is reached, the operator is prompted to start riveting.

2. A self-resistance heating hammer riveting device according to claim 1, characterized in that: A manual power switch (10) is arranged on the riveting gun structure for easy control during the riveting process. The switch is connected to a power control cabinet (16) to directly control the start and stop of the power control cabinet.

3. The self-resistance heating hammer riveting device according to claim 1 is characterized in that: The temperature measuring device (11) is of non-contact type, and when a predetermined temperature is reached, a signal is fed back to a buzzer alarm system to prompt an operator to start riveting.

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