A positioning riveting device for industrial plastic parts

Abstract

The present invention relates to a positioning riveting device for industrial plastic parts, comprising a fixing assembly, a driving guide assembly, a shock absorbing assembly and a riveting assembly. The fixing assembly comprises a fixing plate 1, a fixing plate 2, a fixing plate 3 and a fixing plate 4. The driving guide assembly comprises a hydraulic cylinder and a plurality of guide rods. The shock absorbing assembly comprises a retractable cylinder and a spring shock absorbing damper. The riveting assembly comprises a heat source mechanism, a support plate and a riveting bin. A closed air chamber is provided inside the support plate. The riveting bin comprises a riveting cavity, a riveting bin end cover, a transmission shaft, a riveting pin, a reset spring and a positioning cavity. The upper end of the transmission shaft extends upward into the closed air chamber, passes through the middle of the moving part 2 and the moving part 1 in turn and is fixedly connected to the moving part 2 and the moving part 1. The present invention can solve the deficiencies existing in the prior art, avoid damage to industrial plastic parts, and improve the riveting quality and efficiency of industrial plastic parts and nuts.

Description

Technical Field

[0001] The invention relates to the technical field of riveting devices, and in particular to a positioning riveting device for industrial plastic parts. Background Art

[0002] Pressure riveting is a commonly used mechanical connection method in the aircraft assembly process. Appropriate loading of pressure riveting force can reduce riveting deformation and improve assembly efficiency and assembly performance. Pressure riveting technology plays a key role in the pressure riveting process of plastic parts and nuts, gradually replacing the connection methods of traditional connection technology (traditional riveting, welding).

[0003] In the process of using the existing riveting device to rivet industrial plastic (high-strength polyethylene) parts and nuts, there are the following deficiencies: 1. The existing riveting device is mainly designed for riveting between mechanical parts. For riveting between mechanical parts, the decompression effect can be achieved by simply adjusting the electric control riveting force. However, the material of industrial plastic parts is special. Riveting plastic parts with metal nuts is different from riveting two parts made of the same metal material. It is difficult to achieve decompression by simply adjusting the electric control riveting force. If the force applied to the industrial plastic parts is too large, the industrial plastic parts are easily deformed or even damaged, affecting the quality and pass rate of the riveting. Moreover, for industrial plastic parts, the hardness of the plastic parts decreases after being heated at high temperature. It is difficult to ensure that a good riveting effect can be achieved by simple electric control adjustment. In addition, in order to achieve a good riveting effect and prevent the industrial plastic parts from being deformed by downward pressure during the riveting process, the riveting force required for the industrial plastic parts must have the characteristics of instantaneous riveting and quick release at the same time. However, the existing riveting device does not have a design for the rebound force of the plastic parts riveting, and cannot meet the requirements for the riveting force during the riveting process of industrial plastic parts. Second, the existing riveting device requires manual placement of the nut on the pre-stressing hole of the plastic part, and then slowly placing the plastic part with the nut into the riveting groove. There should be no shaking during this process, otherwise the nut will fall off. Moreover, in the above process, due to the existence of human factors, the position of the plastic part with the nut (aluminum alloy material) placed in the riveting groove is prone to deviation, which will reduce the riveting quality of the industrial plastic parts and the nut (aluminum alloy material) during riveting. In addition, the above entire process requires three staff members to complete. One staff member places the nut on the pre-stressing hole of the plastic part, and the next staff member manually places the plastic part with the nut into the riveting groove, and another staff member starts the riveting equipment for riveting, and finally takes out the riveted plastic parts and nuts. Such a work process requires operators to concentrate highly, and has disadvantages such as low production efficiency and high risk. Summary of the invention

[0004] The object of the present invention is to provide a positioning riveting device for industrial plastic parts, which can solve the shortcomings of the prior art, avoid damage to industrial plastic parts, and improve the riveting quality and efficiency of industrial plastic parts and nuts.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A positioning riveting device for industrial plastic parts comprises a fixing assembly, a driving guide assembly, a shock absorbing assembly and a riveting assembly; the driving guide assembly, the shock absorbing assembly and the riveting assembly are all mounted on the fixing assembly.

[0007] The shock absorbing assembly includes a retractable cylinder and a spring shock absorbing damper; the retractable cylinder includes an upper cylinder body and a lower cylinder body that is slidably matched with the upper cylinder body; a cavity opening downward is opened at the bottom of the upper cylinder body; the upper end of the lower cylinder body extends into the cavity, and a sliding connection is provided between the outer wall of the lower cylinder body and the inner wall of the cavity. The spring shock absorbing damper includes an oil storage pipe, a support rod installed through the bottom of the oil storage pipe, an upper fixing block sleeved on the outer side of the upper end of the oil storage pipe, a lower fixing block sleeved on the outer side of the lower end of the support rod and connected to the lower end of the support rod, a spring sleeved on the outer side of the oil storage pipe and the support rod, a ball plug installed at the opening of the upper end of the oil storage pipe, and a compression adjuster threadedly connected to the ball plug. The upper end of the spring is connected to the upper fixing block, and the lower end is connected to the lower fixing block; the compression adjuster includes an adjustment handle and an adjustment rod with external threads installed at the bottom of the adjustment handle and connected to the ball plug. The riveting assembly comprises a heat source mechanism and a riveting bin; a heat source output assembly of the heat source mechanism contacts a riveting pin of the riveting bin.

[0008] Furthermore, the fixing assembly includes a fixing plate 1, a fixing plate 2, a fixing plate 3 and a fixing plate 4 which are arranged in sequence from top to bottom. A plurality of support columns are arranged at the bottom of the fixing plate 1; and a plurality of connecting rods are arranged between the fixing plate 3 and the fixing plate 4.

[0009] Furthermore, the driving guide assembly includes a hydraulic cylinder invertedly installed on fixed plate one and a plurality of guide rods installed through fixed plate one; the lower end of the piston rod of the hydraulic cylinder passes through fixed plate one and is connected to fixed plate two; the lower end of the guide rod is connected to fixed plate two.

[0010] Furthermore, the riveting assembly also includes a support plate installed at the bottom of the fixed plate four; a closed air chamber is provided inside the support plate; the closed air chamber includes an upper air chamber and a lower air chamber arranged in sequence; a moving part 1 is installed in the upper air chamber; a moving part 2 is installed in the lower air chamber; an air inlet 1 and an air outlet 1 are provided on the upper air chamber; an air inlet 2 and an air outlet 2 are provided on the lower air chamber.

[0011] The riveting bin is installed at the bottom of the support plate, and the number of the riveting bin is at least 1; the riveting bin includes a riveting cavity installed at the bottom of the support plate, a riveting bin end cover arranged at the upper end opening of the riveting cavity, a transmission shaft installed above the riveting bin end cover, a riveting pin installed at the bottom of the riveting bin end cover and located in the riveting cavity, a return spring sleeved on the outside of the riveting pin and located between the riveting bin end cover and the bottom of the riveting cavity, and a positioning cavity arranged at the bottom of the riveting cavity; the upper end of the transmission shaft extends upward into the closed air chamber, and passes through the middle of the moving part 2 and the moving part 1 in sequence and is fixedly connected to the moving part 2 and the moving part 1.

[0012] The bottom of the support plate is also provided with a plurality of pre-stressing rivet bins; the pre-stressing rivet bins include a pre-stressing rivet cavity, a pre-stressing rivet bin end cover installed at the upper end opening of the pre-stressing rivet cavity, and a pre-positioning cavity installed at the bottom of the pre-stressing rivet cavity; a positioning sensor 2 is provided in the pre-positioning cavity.

[0013] Furthermore, the positioning riveting device also includes a nut feeding assembly; the nut feeding assembly includes a driving gear installed on the outer wall of the positioning cavity and a transmission bar installed through the positioning cavity and meshing with the driving gear; a plurality of nut placement positions are provided on the transmission bar; a transmission bar inlet and a transmission bar outlet are opened on the side wall of the positioning cavity; a positioning sensor is provided on the inner wall of the positioning cavity.

[0014] Furthermore, the upper cylinder body includes an upper cylinder body end cover installed at the bottom of the second fixed plate, a circumferential baffle installed at the bottom of the outer periphery of the upper cylinder body end cover, and an annular baffle arranged on the inner side of the lower end of the circumferential baffle; a rubber gasket is provided on the top of the annular baffle; the lower cylinder body includes a lower cylinder body main body and a force-bearing plate arranged on the top of the lower cylinder body.

[0015] Furthermore, the oil storage pipe includes an oil storage pipe cavity; the oil storage pipe cavity includes cavity one and cavity two arranged in sequence; a movable plate is provided in the middle of cavity two; the movable plate separates cavity two into two cavities, an upper cavity and a lower cavity respectively; an oil through port one connecting the upper cavity and cavity one is provided on the upper cavity; an oil through port two connecting the lower cavity and cavity one is provided on the lower cavity; the support rod is installed through the movable plate.

[0016] Furthermore, the support plate includes an upper plate body and a lower plate body detachably connected below the upper plate body.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] (1) The present invention can realize the linear movement of the riveting assembly by providing a hydraulic cylinder according to the physical properties of industrial plastic parts; can ensure the stability of the riveting process by providing a plurality of guide rods evenly distributed along the outer circumference of the hydraulic cylinder; and can realize the rapid downward pressing of the riveting needle when riveting industrial plastic parts on the basis of the electric control regulation in the prior art, so that the industrial plastic parts are subjected to the instantaneous riveting force, thereby achieving a good riveting effect between the industrial plastic parts and the nuts.

[0019] (2) The present invention provides a retractable cylinder and a spring shock absorber to perform multi-level buffering according to the physical properties of industrial plastic parts. The retractable cylinder and the spring shock absorber can quickly release the excess riveting force from multiple dimensions during the riveting process of industrial plastic parts and nuts, thereby preventing the industrial plastic parts from being damaged due to excessive riveting force. In addition, the return spring in the riveting cavity can also play a certain role in shock absorption and buffering during the downward pressing of the riveting pin, release the excess riveting force, and can provide a driving force to the riveting pin with its elastic force when the riveting pin moves upward, thereby driving the riveting pin back to its original position.

[0020] (3) The present invention provides a pre-compression riveting bin and a second positioning sensor in the pre-compression riveting bin, so that during the riveting process, it is possible to detect whether the entire riveting device has moved to the correct position; by providing a first positioning sensor in the riveting bin, it is possible to detect whether the nut to be riveted has reached the correct position during the riveting process, thereby improving the accuracy of the riveting position of industrial plastic parts and nuts and improving the riveting quality of industrial plastic parts. By providing multiple riveting bins, the riveting efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 is a bottom view of the present invention;

[0023] Figure 3 yes Figure 1 The enlarged schematic diagram of the middle A part;

[0024] Figure 4 yes Figure 1 The enlarged schematic diagram of the middle part B;

[0025] Figure 5 It is a structural diagram of the support plate, the riveting chamber, and the pre-riveting chamber;

[0026] Figure 6 yes Figure 5 The enlarged schematic diagram of the middle C part;

[0027] Figure 7 It is a structural schematic diagram of the riveting chamber and the nut feeding assembly;

[0028] Figure 8 It is a structural diagram of the pre-pressing riveting bin;

[0029] Fig. 9 It is a structural schematic diagram of the nut feeding assembly;

[0030] Fig.10 It is a schematic diagram of the structure of the transmission bar.

[0031] in:

[0032] 101. Fixed plate 1, 102. Fixed plate 2, 103. Fixed plate 3, 104. Fixed plate 4, 105. Support column, 106. Connecting rod, 201. Hydraulic cylinder, 202. Guide rod; 301. Upper cylinder end cover, 302. Circumferential baffle, 303. Annular baffle, 304. Lower cylinder, 305. Force plate, 306. Sliding connector, 307. Rubber gasket, 308. Connecting piece; 401. Compression regulator, 402. Ball plug, 403. Oil storage pipe, 4031. Lower cavity, 4032. Upper cavity, 4033. Cavity 1, 404. Support rod, 405. Movable plate, 406. Spring, 407. Upper fixed block, 408. Lower fixed block; 500. Heat source mechanism, 501, connecting pipe; 600, supporting plate, 601, upper plate body, 602, lower plate body, 603, upper air chamber, 604, lower air chamber, 605, moving part one, 606, moving part two; 700, riveting bin, 701, riveting cavity, 702, riveting bin end cover, 703, riveting needle, 704, reset spring, 705, transmission shaft, 706, positioning sensor one, 707, positioning cavity; 800, pre-compression riveting bin, 801, pre-compression riveting cavity, 802, pre-compression riveting bin end cover, 803, pre-positioning cavity, 804, positioning sensor two; 900, nut feeding assembly, 901, driving gear, 902, transmission bar, 903, nut, 904, nut placement position, 905, sawtooth. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings:

[0034] like Figure 1 A positioning riveting device for industrial plastic parts shown in the figure comprises a fixing assembly, a driving guide assembly, a shock absorbing assembly and a riveting assembly.

[0035] like Figure 1 and Figure 2As shown, the fixing assembly includes a fixing plate 1 101, a fixing plate 2 102, a fixing plate 3 103 and a fixing plate 4 104 which are arranged in sequence from top to bottom. A plurality of support columns 105 are arranged at the bottom of the fixing plate 101. A plurality of connecting rods 106 are arranged between the fixing plate 3 103 and the fixing plate 4 104. The lower end of the connecting rod 106 is installed in the fixing plate 4 104 through the fixing plate 2 102, the fixing plate 3 103, the fixing plate 4 104 and the components installed on the three fixing plates. In this way, when the hydraulic cylinder 201 drives the fixing plate 2 102, the fixing plate 3 103, the fixing plate 4 104 and the components installed on the three fixing plates to move downward, the lower end of the connecting rod 106 can first contact the rivet groove, so that the force applied by the rivet groove to the positioning rivet device of the present invention is transmitted upward through the connecting rod 106, reducing the impact on the heat source mechanism 500 between the fixing plate 3 103 and the fixing plate 4 104. The fixing plate 101 is used to install the drive guide assembly. The supporting column 105 plays a role of supporting and fixing. The fixing plate 102 is located below the middle position of the fixing plate 101 and is used for installing the retractable cylinder and the spring shock absorber.

[0036] like Figure 1 As shown, the driving guide assembly includes a hydraulic cylinder 201 invertedly mounted on the fixed plate 101 and a plurality of guide rods 202 installed through the fixed plate 101 and having clearance fit with the fixed plate 101. A limit block is provided at the upper end of the guide rod 202. The lower end of the piston rod of the hydraulic cylinder 201 passes through the fixed plate 101 and is connected to the fixed plate 2 102. The lower end of the guide rod 202 is connected to the fixed plate 2 102. Preferably, the number of guide rods 202 is three, which are evenly distributed on the periphery of the hydraulic cylinder 201. The hydraulic cylinder 201 is used to drive the fixed plate 2 102, the fixed plate 3 103, the fixed plate 4 104, the shock absorbing assembly and the riveting assembly to move downward, so that the riveting assembly is close to the nuts and industrial plastic parts to be riveted. During the downward movement of the piston rod of the hydraulic cylinder 201, the guide rod 202 will move downward along with the piston rod of the hydraulic cylinder. The guide rod 202 plays a guiding role, so that all other components of the device except the hydraulic cylinder 201, the guide rod 202 and the support column 105 move linearly downward with the hydraulic cylinder without shaking. The limit block on the guide rod 202 plays a limiting role, which limits the movement stroke of the guide rod 202 in the vertical direction. By setting three evenly distributed guide rods 202, the three guide rods 202 form an equilateral triangle, which can further ensure the stability of the above-mentioned downward linear movement process.

[0037] like Figure 1As shown, the shock absorbing assembly includes a retractable cylinder and a plurality of spring shock absorbing dampers. The retractable cylinder is located in the middle position, and a plurality of spring shock absorbing dampers are evenly distributed along the periphery of the retractable cylinder. The shock absorbing assembly in the present invention has two functions: First, when the shock absorbing assembly and the rivet assembly move downward with the hydraulic cylinder 201, when the rivet assembly contacts the rivet groove, the rivet groove will give the shock absorbing assembly and the rivet assembly an upward impact force, and the shock absorbing assembly can buffer this impact force to avoid damage to the hydraulic cylinder 201. The retractable cylinder can relieve the impact force from the middle position, and the spring shock absorbing damper can relieve the impact force from the periphery. Second, due to the particularity of the material of industrial plastic parts, if the force applied by the rivet needle in the rivet assembly is too large, the industrial plastic parts are easily damaged, affecting the quality of the rivet or making the rivet process unable to proceed normally. Industrial plastic parts are different from metal parts. It is difficult to restore after being damaged. After being damaged, they are generally scrapped, which increases production costs. By setting the shock-absorbing component, a reverse force can be applied during the process of the rivet pin in the rivet component riveting nuts and plastic parts, so as to release the excess riveting force during the riveting process, making the riveting process between the rivet pin in the rivet component and the metal nut and plastic parts gentler, thus avoiding damage to the plastic parts and improving the riveting quality. The retractable cylinder and the spring shock-absorbing damper have different installation positions and working principles. By setting the retractable cylinder and the spring shock-absorbing damper at different positions, multi-level and multi-type buffering can be achieved during the riveting process, ensuring that the excess riveting force is released quickly and thoroughly during the riveting process.

[0038] like Figure 3As shown, the retractable cylinder includes an upper cylinder body installed at the bottom of the second fixing plate 102 and a lower cylinder body 304 installed at the top of the third fixing plate 103 and slidingly matched with the upper cylinder body. A cavity opening downward is provided at the bottom of the upper cylinder body. The upper cylinder body includes an upper cylinder body end cover 301 installed at the bottom of the second fixing plate 102, a circumferential baffle 302 installed at the bottom of the outer periphery of the upper cylinder body end cover 301, and an annular baffle 303 arranged on the inner side of the lower end of the circumferential baffle 302. A rubber gasket 307 is provided on the top of the annular baffle 303. The lower cylinder body 304 includes a lower cylinder body main body and a force plate 305 arranged at the top of the lower cylinder body. The upper end of the lower cylinder body 304 extends into the cavity, and a sliding connector 306 is provided between the outer wall of the lower cylinder body 304 and the inner wall of the cavity. The retractable cylinder plays a shock absorbing and buffering role through the sliding cooperation between the upper cylinder body and the lower cylinder body 304. When the impact force of the rivet groove on the positioning rivet device of the present invention is transmitted to the fixed plate 3 103, the impact force received by the middle position of the fixed plate 3 103 will be transmitted to the retractable cylinder, so that the lower cylinder body 304 moves upward, thereby buffering the impact force. The circumferential baffle 302 and the annular baffle 303 are integrally formed, and the structure formed by the circumferential baffle 302 and the annular baffle 303 is a baffle structure. The fixing plate 2 102, the upper cylinder body end cover 301 and the baffle structure are connected by a connecting member 308. The connecting member 308 can be a fastening screw or a fastening bolt. Since the top of the lower cylinder body 304 is provided with a force plate 305 larger than the top size of the lower cylinder body, by dividing the upper cylinder body into the upper cylinder body end cover 301 and the baffle structure, it is convenient for the lower cylinder body 304 to be assembled in the cavity. When not subjected to impact force, the outer periphery of the force plate 305 is placed above the rubber gasket 307 and is in close contact with the rubber gasket 307. The rubber gasket 307 plays a role in shock absorption and protection, preventing the force-bearing plate 305 from being damaged by direct collision with the baffle structure. When subjected to impact force, the lower cylinder body 304 can move upward in a straight line because a sliding connector 306 is provided between the outer periphery of the lower cylinder body 304 and the inner periphery of the cavity. When the force-bearing plate 305 hits the bottom of the upper cylinder body end cover 301, the movement stops. During the upward movement of the lower cylinder body 304, a part of the riveting force applied by the rivet pin 703 to the industrial plastic parts and the metal nut can be released to prevent the industrial plastic parts from being deformed due to excessive riveting force. Since the force-bearing plate 305 will collide with the upper cylinder body end cover 301, the material of the force-bearing plate 305 needs to have wear-resistant properties. The sliding connector 306 can be any structure in the prior art such as a pulley or a ball that can achieve relative sliding of two components. When the sliding connection 306 adopts a pulley, the pulley is installed on the outer wall of the lower cylinder body 304, and a limiting groove is provided on the inner wall of the cavity (specifically, the inner wall of the annular baffle 303). The outer end of the pulley is located in the limiting groove. Under the action of external force, the pulley moves up and down along the limiting groove.

[0039] like Figure 4As shown, the spring shock absorber includes an oil storage pipe 403, a support rod 404 installed through the bottom of the oil storage pipe 403, an upper fixed block 407 sleeved on the outer side of the upper end of the oil storage pipe 403 and connected to the bottom of the second fixing plate 102, a lower fixed block 408 sleeved on the outer side of the lower end of the support rod 404 and connected to the lower end of the support rod 404, a spring 406 sleeved on the outer side of the oil storage pipe 403 and the support rod 404, a ball plug 402 installed at the upper end opening of the oil storage pipe 403, and a compression adjuster 401 threadedly connected to the ball plug 402. The lower end of the lower fixed block 408 is connected to the third fixing plate 103. The upper end of the spring 406 is connected to the upper fixed block 407, and the lower end is connected to the lower fixed block 408. The compression adjuster 401 includes an adjustment handle arranged above the second fixing plate 102 and an adjustment rod with external threads installed at the bottom of the adjustment handle and connected to the ball plug 402 after passing through the second fixing plate 102. The ball plug 402 is made of rubber. The oil storage tube 403 includes an oil storage tube cavity; the oil storage tube cavity includes a cavity 1 4033 and a cavity 2 arranged in sequence; a movable plate 405 is arranged in the middle of the cavity 2; the movable plate 405 separates the cavity 2 into two cavities, an upper cavity 4032 and a lower cavity 4031; the upper cavity 4032 is provided with an oil through hole 1 connecting the upper cavity 4032 and the cavity 1 4033; the lower cavity 4031 is provided with an oil through hole 2 connecting the lower cavity 4031 and the cavity 1 4033; the support rod 404 is installed through the movable plate 405. The compression adjuster 401 is used to adjust the position of the ball plug 402 in the oil storage tube cavity and change the volume of the oil storage tube cavity to meet the shock absorption requirements of different impact forces and the pressure riveting buffer requirements of plastic parts of different specifications. By rotating the compression regulator 401, the ball plug 402 can be moved up and down in the oil storage tube cavity. A ball plug 402 and a compression regulator 401 can be installed at the upper end opening of the cavity 1 4033, and a ball plug 402 and a compression regulator 401 can be installed at the upper end opening of the upper cavity 4032, so as to adjust the volumes of the cavity 1 4033 and the cavity 2 respectively. When the connecting rod 106 is subjected to an impact force, it will be transmitted to the fixed plate 3 103, and the outer periphery of the fixed plate 3 103 will transmit the impact force to the support rod 404, so that the support rod 404 moves upward. When the support rod 404 moves upward, it will drive the movable plate 405 to move upward, so that the hydraulic oil in the upper cavity 4032 enters the cavity 1 4033 through the oil port 1, and the hydraulic oil in the cavity 1 4033 will enter the lower cavity 4031 through the oil port 2, thereby converting the impact force into the movement of the hydraulic oil, and reducing the impact force. When the support rod 404 moves upward, the spring 406 will be compressed, and the spring 406 further plays a shock absorbing and buffering role.When the impact force disappears, under the reset action of the spring 406, the lower fixed block 408 moves downward with the support rod 404, and the hydraulic oil in the lower cavity 4031 enters the cavity 1 4033, and the hydraulic oil in the cavity 1 4033 enters the upper cavity 4032 until the spring 406 returns to its original position. During the riveting process of the rivet needle 703, since the elastic shock-absorbing damper has a certain elastic movement space, the excessive riveting force in the riveting process can be released, so that the riveting force applied by the rivet needle 703 to the industrial plastic parts and nuts is softer, thereby avoiding damage to the industrial plastic parts and improving the riveting quality.

[0040] For the riveting between mechanical parts, the pressure relief effect can be achieved by simply adjusting the electrically controlled riveting force. However, for industrial plastic parts, the hardness of the plastic parts decreases after being heated at high temperature. It is difficult to ensure that a good riveting effect can be achieved by simply adjusting the electrically controlled force. The riveting of industrial plastic parts pays more attention to the instantaneous force. Under the action of the instantaneous force, the parts must be pressed down quickly to achieve a good riveting effect. During the riveting process, the excess riveting force must be released quickly to prevent the industrial plastic parts from being deformed by the downward pressure. Therefore, the present invention adopts a retractable cylinder and a spring shock-absorbing damper to realize a multi-level and multi-type buffer component design, which realizes that the industrial plastic parts can be subjected to instantaneous force during the riveting process from multiple dimensions, and can release the force in time after the instantaneous force acts, thereby realizing the rapid riveting of industrial plastic parts and nuts, and avoiding damage to industrial plastic parts, thereby improving the quality of riveting. The riveting assembly includes a heat source mechanism 500 installed at the bottom of the fixed plate three 103, a support plate 600 installed at the bottom of the fixed plate four 104, and a plurality of riveting chambers 700 and a plurality of pre-riveting chambers 800 installed at the bottom of the support plate 600. The riveting chamber 700 is arranged in a one-to-one correspondence with the pre-riveting chamber 800. By setting a plurality of riveting chambers 700 and pre-riveting chambers 800, it is possible to perform riveting operations on a plurality of nuts and industrial plastic parts at the same time, greatly improving the riveting efficiency. The heat source output assembly of the heat source mechanism 500 is in contact with the riveting pin 703 of the riveting chamber 700. The heat source mechanism 500 is used to heat the riveting pin 703 so that the riveting pin 703 that can move downward has the function of riveting the nuts and plastic parts together. The heat source mechanism 500 is a traditional heat source component, and a heating component with a thermoelectric heat transfer material (block material, fiber and film) can be used to connect the thermoelectric heat transfer material to the riveting pin 703 to achieve heat conduction. It is also possible to use an electric heating rod or hot melt machine in the prior art, install the electric heating rod or hot melt machine in the corresponding position of the fixed component through a traditional movable method (slide, guide rail, etc.), and then connect the heating component of the electric heating rod or hot melt machine with the rivet pin 703 through the connecting tube 501, as long as the heated connecting tube 501 can move with the rivet pin. In the process of connecting the connecting tube 501 with the rivet pin, the existing technology can be used for heat insulation design when passing through the parts that do not need to be heated. Since the temperature of the heating rod in the hot melt machine is adjustable, the temperature of the rivet pin can be indirectly adjusted by using the hot melt machine as a heat source mechanism, so that the temperature of the rivet pin can be adjusted to a suitable temperature for plastic parts of different specifications, ensuring the rivet effect and meeting the rivet requirements of plastic parts of different specifications.

[0041] In order to further increase the response speed of the riveting force of industrial plastic parts and obtain the reverse force of industrial plastic parts in the first place, a support plate design can also be used. Figure 5 and Figure 6As shown, the support plate 600 includes an upper plate body 601 and a lower plate body 602 detachably connected to the lower part of the upper plate body 601. A sealed air chamber is provided inside the support plate 600; the sealed air chamber includes an upper air chamber 603 and a lower air chamber 604 arranged in sequence; a moving part 1 605 is installed in the upper air chamber 603; and a moving part 2 606 is installed in the lower air chamber 604. An air inlet 1 and an air outlet 1 are provided on the upper air chamber 603, the air inlet 1 is located on the upper air chamber 603 above the moving part 1 605, and the air outlet 1 is located on the upper air chamber 603 below the moving part 1 605. An air inlet 2 and an air outlet 2 are provided on the lower air chamber 604. The air inlet 2 is located on the lower air chamber 604 below the moving part 2 606, and the air outlet 2 is located on the lower air chamber 604 below the moving part 2 606. Since gas needs to be introduced into the sealed air chamber, in order to facilitate the introduction of gas into the sealed air chamber, the support plate 600 is divided into two upper and lower plates, so that it is convenient to set a gas pipeline inside the support plate 600. Under the action of the gas pump, the gas pipeline is used to introduce and discharge the gas in the sealed air chamber. When gas is introduced into the air inlet 1 (the air inlet 2 is not ventilated at this time), the moving part 1 605 will be driven to move downward. Since the moving part 1 605 is connected to the transmission shaft 705 in the riveting chamber 700, the transmission shaft 705 will move downward at the same time. During the downward movement of the moving part 1 605, the gas in the upper air chamber 603 will flow out of the upper air chamber 603 through the air outlet 2. During the downward movement of the transmission shaft 705, the transmission shaft 705 will drive the moving part 2 606 to move downward as well. After the riveting is completed, gas is introduced into the lower cavity of the moving part 2 of the lower air chamber 604 through the air inlet 2, and the gas generates an upward force on the moving part 2 606, so that the transmission shaft 705 drives the moving part 2 606 to move upward. During the upward movement of the moving part 2 606, the gas in the lower air chamber 604 will flow out of the lower air chamber 604 through the air outlet 2. Since the moving part 2 606 is connected to the transmission shaft 705, when the moving part 2 moves upward, the transmission shaft 705 will move upward together, and then the riveting chamber end cover 702 and the riveting needle 703 connected to the transmission shaft 7105 will also move upward together until they return to their original positions. By setting a closed air chamber in the support plate 600, the riveting needle 703 can be driven to move downward, and the movement state of the riveting needle 703 can be controlled by controlling the speed and amount of the gas introduced into the closed air chamber; and the reaction force received by the riveting needle 703 can be transmitted upward to buffer the reaction force.

[0042] like Figure 7As shown, the riveting chamber 700 includes a riveting chamber 701 installed at the bottom of the support plate 600, a riveting chamber end cover 702 arranged at the upper end opening of the riveting chamber 701 and having a clearance fit with the riveting chamber 701, a transmission shaft 705 installed above the riveting chamber end cover 702, a riveting pin 703 installed at the bottom of the riveting chamber end cover 702 and located in the riveting chamber 701, a return spring 704 sleeved on the outside of the riveting pin 703 and located between the riveting chamber end cover 702 and the bottom of the riveting chamber 701, and a positioning chamber 707 arranged at the bottom of the riveting chamber 701; the upper end of the transmission shaft 705 extends upward into the closed air chamber, passes through the middle of the moving part 2 606 and the moving part 1 605 in sequence, and is fixedly connected to the moving part 2 606 and the moving part 1 605. A positioning sensor 1 706 is provided on the inner wall of the positioning chamber 707. The positioning sensor 1 706 is used to detect the position of the riveting chamber 700 to ensure that the riveting needle 703 can face the metal nut and industrial plastic parts to be riveted, thereby improving the riveting quality. The side wall of the positioning cavity 707 is provided with a conveying bar entrance and a conveying bar exit. Driven by the gas in the closed air chamber in the support plate 600, the transmission shaft 705 will move downward, driving the riveting chamber end cover 702 and the riveting needle 703 fixedly connected to the riveting chamber end cover to move downward. When the riveting needle 703 contacts the metal nut in the positioning cavity 707, a downward force will be applied to the nut, so that the metal nut and the industrial plastic parts are riveted together. During the downward movement of the riveting needle 703, the reset spring 704 is always compressed. When the riveting process is completed, gas is introduced into the air inlet 2 of the closed air chamber, and the air inlet 1 stops introducing gas, and the moving part 2 will drive the riveting needle 703, the riveting chamber end cover 702 and the transmission shaft 705 to move upward. At the same time, the elastic force of the return spring 704 also gives an upward driving force to the rivet pin 703, the rivet bin end cover 702 and the transmission shaft 705, driving each component to quickly return to the initial position. During the upward movement of the transmission shaft 705, the moving part 2 606 and the moving part 1 605 are driven to move upward together, so that the moving part 1 605 and the moving part 2 606 also return to the initial position.

[0043] like Figure 8 As shown, the pre-compression riveting bin 800 includes a pre-compression riveting cavity 801, a pre-compression riveting bin end cover 802 installed at the upper end opening of the pre-compression riveting cavity 801, and a pre-positioning cavity 803 installed at the bottom of the pre-compression riveting cavity 801; a second positioning sensor 804 is provided in the pre-positioning cavity 803. The pre-compression riveting bin 800 is used to judge the accuracy of the position of the riveting bin 700 when the riveting assembly reaches the riveting groove. A positioning piece corresponding to the pre-compression riveting bin 800 is provided on the riveting groove. When the positioning piece extends into the pre-positioning cavity 803 and the second positioning sensor 804 detects the positioning piece, it can be determined that the current position of the riveting bin 700 is accurate and the riveting operation can be performed.

[0044] like Figure 1 As shown, the positioning riveting device also includes a nut feeding assembly 900. Fig. 9 As shown, the nut feeding assembly 900 includes a driving gear 901 installed on the outer wall of the positioning cavity 707 and a transmission bar 902 installed in the positioning cavity 707 and meshingly connected with the driving gear 901. The driving gear 901 is rotated by an external driving motor. The driving gear 901 is sleeved on the output shaft of the driving motor. Fig.10 As shown, the conveying bar 902 is provided with a plurality of nut placement positions 904. When the nut is loaded, the nut 903 made of metal material is placed on the nut placement position 904 of the conveying bar 902. Driven by the driving motor, the driving gear 901 rotates. Since the driving gear 901 is meshed with the sawtooth 905 on the conveying bar 902, the conveying bar 902 can move linearly, thereby carrying the nut 903 made of metal material to the riveting assembly. The conveying bar 902 carrying the nut 903 made of metal material enters the riveting cavity 701 through the conveying bar entrance. The riveting pin 703 exerts a downward force on the nut, causing the nut to fall off from the nut placement position 904, fall into the industrial plastic part, and be riveted together with the industrial plastic part. Compared with other parts of the conveying bar 902, the material at the nut placement position 904 is relatively fragile. When subjected to a large riveting force from the riveting pin 703, the nut will be broken, causing the nut placed there to fall. When the nuts on the currently working conveyor bar 902 have completed the riveting operation with the industrial plastic parts, the nut placement position on the conveyor bar 902 is repaired. By setting the nut feeding assembly 900, manual nut feeding can be avoided, thereby improving work efficiency and the accuracy of nut placement.

[0045] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A positioning riveting device for industrial plastic parts, comprising a fixing assembly, a driving guide assembly, a shock absorbing assembly and a riveting assembly; the driving guide assembly, the shock absorbing assembly and the riveting assembly are all mounted on the fixing assembly, and is characterized in that: The shock absorbing assembly comprises a retractable cylinder and a spring shock absorbing damper; the retractable cylinder comprises an upper cylinder body and a lower cylinder body (304) slidably matched with the upper cylinder body; a cavity opening downward is provided at the bottom of the upper cylinder body; the upper end of the lower cylinder body (304) extends into the cavity, and a sliding connection piece (306) is provided between the outer wall of the lower cylinder body (304) and the inner wall of the cavity; the spring shock absorbing damper comprises an oil storage pipe (403), a support rod (404) penetrating and installed at the bottom of the oil storage pipe (403), an upper fixing block (407) sleeved on the outer side of the upper end of the oil storage pipe (403), a lower fixing block (408) sleeved on the outer side of the lower end of the support rod (404) and connected to the lower end of the support rod (404), and a The oil storage pipe (403) and the spring (406) outside the support rod (404), the ball plug (402) installed at the upper end opening of the oil storage pipe (403) and the compression adjuster (401) threadedly connected to the ball plug (402); the upper end of the spring (406) is connected to the upper fixing block (407), and the lower end is connected to the lower fixing block (408); the compression adjuster (401) includes an adjustment handle and an adjustment rod with external threads installed at the bottom of the adjustment handle and connected to the ball plug (402); the riveting assembly includes a heat source mechanism (500) and a riveting chamber (700); the heat source output assembly of the heat source mechanism (500) is in contact with the riveting pin (703) of the riveting chamber (700); The fixing assembly comprises a fixing plate 1 (101), a fixing plate 2 (102), a fixing plate 3 (103) and a fixing plate 4 (104) which are arranged in sequence from top to bottom; The riveting assembly also includes a support plate (600) mounted at the bottom of the fixing plate 4 (104); a sealed air chamber is provided inside the support plate (600); the sealed air chamber includes an upper air chamber (603) and a lower air chamber (604) which are arranged in sequence; a moving part 1 (605) is installed in the upper air chamber (603); a moving part 2 (606) is installed in the lower air chamber (604); an air inlet 1 and an air outlet 1 are provided on the upper air chamber (603); and a moving part 3 (606) is installed in the lower air chamber (604). The air chamber (604) is provided with two air inlets and two air outlets; the press riveting chamber (700) is installed at the bottom of the support plate (600), and the number of the press riveting chamber (700) is at least one; the press riveting chamber (700) comprises a press riveting cavity (701) installed at the bottom of the support plate (600), a press riveting chamber end cover (702) arranged at the upper end opening of the press riveting cavity (701), a transmission shaft (705) installed above the press riveting chamber end cover (702), and a transmission shaft (705) installed at the bottom of the press riveting chamber end cover (702). The invention relates to a riveting pin (703) which is disposed at the bottom of the riveting chamber and is located in the riveting chamber (701), a return spring (704) which is sleeved on the outside of the riveting pin (703) and is located between the riveting chamber end cover (702) and the bottom of the riveting chamber (701), and a positioning chamber (707) which is arranged at the bottom of the riveting chamber (701); the upper end of the transmission shaft (705) extends upward into the sealed air chamber, and passes through the middle of the moving part 2 (606) and the moving part 1 (605) in sequence and is connected to the moving part The second (606) and the moving part (605) are fixedly connected; the bottom of the support plate (600) is also provided with a plurality of pre-compression riveting bins (800); the pre-compression riveting bins (800) include a pre-compression riveting cavity (801), a pre-compression riveting bin end cover (802) installed at the upper end opening of the pre-compression riveting cavity (801), and a pre-positioning cavity (803) installed at the bottom of the pre-compression riveting cavity (801); the pre-positioning cavity (803) is provided with a positioning sensor 2 (804); The oil storage pipe (403) comprises an oil storage pipe cavity; the oil storage pipe cavity comprises a cavity one (4033) and a cavity two which are arranged in sequence; a movable plate (405) is arranged in the middle of the cavity two; the movable plate (405) separates the cavity two into two cavities, namely an upper cavity (4032) and a lower cavity (4031); an oil through port one connecting the upper cavity (4032) and the cavity one (4033) is provided on the upper cavity (4032); an oil through port two connecting the lower cavity (4031) and the cavity one (4033) is provided on the lower cavity (4031); the support rod (404) is installed through the movable plate (405).

2. A positioning riveting device for industrial plastic parts according to claim 1, characterized in that: A plurality of support columns (105) are provided at the bottom of the fixing plate one (101); and a plurality of connecting rods (106) are provided between the fixing plate three (103) and the fixing plate four (104).

3. A positioning riveting device for industrial plastic parts according to claim 2, characterized in that: The driving guide assembly comprises a hydraulic cylinder (201) invertedly mounted on a fixed plate (101) and a plurality of guide rods (202) penetratingly mounted on the fixed plate (101); the lower end of the piston rod of the hydraulic cylinder (201) passes through the fixed plate (101) and is connected to the fixed plate (102); the lower end of the guide rod (202) is connected to the fixed plate (102).

4. A positioning riveting device for industrial plastic parts according to claim 1, characterized in that: It also includes a nut loading component (900); the nut loading component (900) includes a driving gear (901) installed on the outer wall of the positioning cavity (707) and a transmission bar (902) installed in the positioning cavity (707) and meshingly connected with the driving gear (901); a plurality of nut placement positions (904) are provided on the transmission bar (902); a transmission bar inlet and a transmission bar outlet are opened on the side wall of the positioning cavity (707); and a positioning sensor (706) is provided on the inner wall of the positioning cavity (707).

5. A positioning riveting device for industrial plastic parts according to claim 2, characterized in that: The upper cylinder body comprises an upper cylinder body end cover (301) mounted on the bottom of the second fixing plate (102), a circumferential baffle (302) mounted on the outer circumferential bottom of the upper cylinder body end cover (301), and an annular baffle (303) arranged on the inner side of the lower end of the circumferential baffle (302); a rubber gasket (307) is arranged on the top of the annular baffle (303); and the lower cylinder body (304) comprises a lower cylinder body main body and a force-bearing plate (305) arranged on the top of the lower cylinder body.

6. A positioning riveting device for industrial plastic parts according to claim 1, characterized in that: The support plate (600) comprises an upper plate body (601) and a lower plate body (602) detachably connected below the upper plate body (601).

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