Molybdenum cylinder automatic rotation riveting machine

Abstract

The utility model relates to the technical field of machining, and discloses a molybdenum cylinder automatic rotation riveting machine which comprises a spin riveting machine, an electric heating device, a material containing trolley and a control system, and a spin riveting interval is formed between a pressing rivet head of the spin riveting machine and a forming tool; the electric heating device comprises a heater, a current-conducting plate and a current-conducting plate displacement assembly, the current-conducting plate is provided with a first station and a second station, when the current-conducting plate is located at the first station, the current-conducting plate is located at a waiting position, and when the current-conducting plate is located at the second station, the current-conducting plate is used for heating a rivet to be riveted on a molybdenum cylinder. The material containing trolley is used for driving the molybdenum cylinder to rotate according to the set step length, and the spin riveting driver, the heater, the conductive plate displacement assembly and the molybdenum cylinder rotating mechanism are all connected with the control system. The device has the beneficial effects that the molybdenum cylinder is controlled by the control system to automatically rotate, the precision is high, the rivet spacing rotation error is reduced, rivet alignment is avoided, one-time spin riveting is achieved, and the investment of manpower, material resources and financial resources is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to an automatic rotary riveting machine for molybdenum cylinders. Background Technique

[0002] Riveting is a common connection process. By fixing rivets or rivet caps on workpieces, a firm connection is formed between the workpieces. Common riveting techniques are divided into cold riveting and hot riveting. Cold riveting forms the rivet with continuous local deformation. The rivet material has particularly good deformation performance, and there will be no quality problems with the rivet rod, and the service life is relatively high. Hot riveting is the riveting carried out after heating the rivet to a certain temperature. Since the plasticity of the rivet increases and the hardness decreases after heating, it is easy to form the rivet head. Therefore, the external force required for hot riveting is much smaller than that for cold riveting. Hot riveting is commonly used when the plasticity of the rivet material is poor, the diameter of the rivet is large, or the riveting force is insufficient. Tungsten and molybdenum belong to rare refractory metals, which have characteristics such as high melting point, high density, and high hardness. Therefore, hot riveting needs to be adopted during the riveting process. The pneumatic rotary riveting machine is a commonly used device for riveting. It uses a rivet rod to apply local pressure to the rivet and continuously swing around the center until the rivet is formed. The riveting speed is fast, the occupied space is small, it has a desktop structure, low power consumption, no pollution to the operating oil, and low noise.

[0003] In the existing riveting and assembly of large-size molybdenum cylinders, it is impossible to complete the riveting work of molybdenum cylinders when the workpiece to be processed rotates automatically. It requires multiple people to cooperate to accurately align and fix the materials to be riveted on the working platform below the riveting tool, and then press down the riveting tool to trigger the riveting process. On the other hand, due to poor communication in manual cooperation, deviations are extremely likely to occur. It is not easy to accurately place the rivets on the working table below the riveting tool, resulting in difficult riveting. In addition, defects such as missed riveting or loose riveting are likely to occur, which is not conducive to ensuring the product quality, causing rework and repair, wasting manpower and material resources, and having low work efficiency. Content of the Utility Model

[0004] The purpose of the utility model is to provide an automatic rotary riveting machine for molybdenum cylinders to solve the problems of difficult manual riveting cooperation, resulting in rework and repair, and low work efficiency in the above-mentioned background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An automatic rotary riveting machine for molybdenum cylinders, comprising: a rotary riveting machine, which includes a frame, a first cross beam, a second cross beam and a rotary riveting driver; the first cross beam and the second cross beam are arranged along a first direction and extend along a second direction, the second direction being perpendicular to the first direction, the first cross beam and the second cross beam are both installed on the frame and are arranged opposite to each other up and down, the rotary riveting driver is installed on the first cross beam, the output end of the rotary riveting driver has a riveting head, the second cross beam has a forming tool corresponding to the riveting head, and there is a rotary riveting interval between the riveting head and the forming tool;

[0007] An electric heating device, which includes a heater, a conductive plate and a conductive plate displacement assembly; the output end of the heater is connected to the conductive plate, the conductive plate has a first working position and a second working position, when in the first working position, the conductive plate is located at the waiting position, when in the second working position, the conductive plate is used to heat the rivets to be rotary riveted on the molybdenum cylinder, the conductive plate displacement assembly is arranged on the first cross beam and is connected to the conductive plate, and is used to drive the conductive plate to switch between the first working position and the second working position;

[0008] A material placing cart, which includes a vehicle frame and a molybdenum cylinder rotating mechanism; the molybdenum cylinder rotating mechanism is installed on the vehicle frame, and is used to make the axis of the molybdenum cylinder extend along the second direction and drive the molybdenum cylinder to rotate by a set step length, the set step length being equal to the arc length of the interval between the prefabricated rivet holes on the molybdenum cylinder along the circumferential direction of the molybdenum cylinder;

[0009] A control system, the rotary riveting driver, the heater, the conductive plate displacement assembly and the molybdenum cylinder rotating mechanism are all connected to the control system. By controlling the rotation step length of the molybdenum cylinder, the heating of the rivets by the conductive plate, the pressing down of the rotary riveting driver, etc. by the control system, automatic rotary riveting of the molybdenum cylinder is realized, greatly reducing the defects caused by human factors, and thus having good economic value and popularization and application value.

[0010] Further, the conductive plate displacement assembly includes a rotating member and a horizontal displacement driver, the rotating member and the horizontal displacement driver are both arranged on the bottom side of the first cross beam, the first end of the conductive plate is connected to the rotating member, and the output end of the horizontal displacement driver is connected to the conductive plate to drive the conductive plate to switch between the first working position and the second working position. Through this setting, the conductive plate is switched between the first working position and the second working position to complete the heating of the rivets and avoid the riveting head during riveting.

[0011] Further, the horizontal displacement driver includes a first cylinder, and the conductive plate displacement assembly further includes a positioning block, the positioning block is installed on the lower side of the first cross beam, and the first cylinder is rotatably connected to the positioning block. Through this setting, when the first cylinder pushes the conductive plate to switch between the first working position and the second working position, the conductive plate rotates around the rotating member as the axis, and at the same time, the first cylinder adjusts its own rotation angle following the moving direction of the conductive plate to prevent the deformation of the conductive sheet.

[0012] Further, it also includes a vertical displacement driver, which is installed on the first cross beam. The output end of the vertical displacement driver cooperates with the conductive plate to press down the conductive plate to contact the rivet on the molybdenum cylinder when the conductive plate is in the second working position. The vertical displacement driver includes a second cylinder. Through this setting, the second cylinder can press down the conductive plate to contact the rivet. After the heat conduction ends, the second cylinder lifts, and the conductive plate returns to its original position by its own elasticity.

[0013] Further, the conductive plate includes a displacement driving section, an inclined section, and a heating section; the displacement driving section is connected to the heating section through the inclined section. The displacement driving section is connected to the conductive plate displacement assembly, and the heating section cooperates with the rivet on the molybdenum cylinder. The inclined section gradually approaches the lower tooling of the second cross beam along the length direction of the second cross beam. Through this setting, the pressing stroke of the second cylinder can be shortened, which is convenient for the conductive plate to contact the rivet to be heated on the molybdenum cylinder.

[0014] The molybdenum cylinder rotating mechanism includes a servo motor, a driving rotating assembly, and a driven rotating assembly; the driving rotating assembly and the driven rotating assembly are installed on the vehicle frame at intervals. The interval between the driving rotating assembly and the driven rotating assembly is used to place the molybdenum cylinder and make the axis of the molybdenum cylinder extend along the second direction. The output end of the servo motor is connected to the driving rotating assembly to drive the molybdenum cylinder to rotate by a set step length through the driving rotating assembly.

[0015] The driving rotating assembly includes a driving shaft and a first rubber wheel; the driven rotating assembly includes a driven shaft and a second rubber wheel; the driving shaft and the driven shaft are arranged opposite to each other and at intervals on the vehicle frame. The interval between the driving shaft and the transmission shaft is used to place the molybdenum cylinder. The first rubber wheels are installed on the driving shaft at intervals, and the second rubber wheels are installed on the driven shaft at intervals. Both the first rubber wheel and the second rubber wheel are in contact with the molybdenum cylinder, and the output end of the servo motor is connected to the driving shaft. Through this setting, the axis directions of the driving shaft and the transmission shaft are parallel to the axis direction of the molybdenum cylinder, and the first rubber wheel and the second rubber wheel are in contact with the molybdenum cylinder, which can drive the molybdenum cylinder to rotate and ensure the rotation stability of the molybdenum cylinder at the same time.

[0016] Wheels are installed at the bottom of the vehicle frame. Through this setting, it is convenient for the material loading trolley to move.

[0017] The machine frame includes a base and columns. The columns are installed on the base, the first cross beam is fixed to the columns, and the second cross beam is installed on the columns in a position-adjustable manner along the first direction. Through this setting, the structure of the machine frame is simple and easy to implement.

[0018] Height adjustment holes are opened in the columns along their first direction. The first end of the second cross beam has an adjustment plate, and the adjustment plate is connected to the height adjustment holes through adjustment bolts to achieve adjustable height of the second cross beam.

[0019] The control system includes a control box, a PLC controller, and a remote control handle; the PLC controller is located inside the control box, and the remote control handle, the riveting driver, the heater, the conductive plate displacement assembly, and the servo motor are all connected to the PLC controller. By setting parameters through the PLC controller, the rotation step of the molybdenum cylinder driven by the servo motor is made equal to the circumferential interval arc length of the prefabricated rivet holes on the molybdenum cylinder. Through the handle operation, the conductive sheet is heated and the riveting driver performs riveting, so that the rotation error is controlled within 0.008 MM, and one-time riveting is completed.

[0020] The utility model has the following advantages compared with the prior art:

[0021] 1. For the automatic rotating riveting machine of the molybdenum cylinder of the utility model, by setting a riveting machine, an electric heating device, a material placing trolley, and a control system, the control system is used to control the molybdenum cylinder to rotate at a set step, and this set step is equal to the circumferential interval arc length of the prefabricated rivet holes on the molybdenum cylinder. The control system controls the electric heating device to heat the rivets to be riveted on the molybdenum cylinder, and after heating, pressure is applied for riveting. With this device, automatic riveting can be realized, and the riveting speed is fast, the riveting efficiency is high, the riveting quality is good and stable.

[0022] 2. For the automatic rotating riveting machine of the molybdenum cylinder of the utility model, the structure of the material placing trolley is simple and easy to prepare. The length of the material placing trolley and the interval between the driving shaft and the driven shaft on the vehicle frame can be determined according to the diameter and length of the molybdenum cylinder. The driving shaft is driven to rotate by a servo motor, and its control accuracy is high. Through the cooperation of the material placing trolley and the riveting machine, automatic riveting of the riveting head is realized, which can reduce the rotation error of the rivet spacing during manual riveting, avoid the alignment of the rivets, achieve one-time riveting completion, and the alignment is stable and the accuracy is high, greatly reducing defects such as missed riveting and loose rivets caused by human factors.

[0023] 3. For the automatic rotating riveting machine of the molybdenum cylinder of the utility model, its control system includes a PLC controller and a remote control handle. By writing a control program through the PLC controller and inputting relevant parameters, the overall automation degree of controlling the rotation of the molybdenum cylinder, heating the rivets, and applying riveting pressure by using the handle is high. When in use, only two people are needed to operate to complete, reducing the investment in manpower, material resources, and financial resources, improving the per capita labor efficiency, and having good economic value. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the automatic rotating riveting machine of the molybdenum cylinder in the embodiment of the utility model;

[0025] Figure 2 It is a schematic structural diagram of another angle of the automatic rotating riveting machine of the molybdenum cylinder in the embodiment of the utility model;

[0026] Figure 3 It is Figure 2 The enlarged schematic diagram at A in

[0027] Figure 4 This is a schematic structural diagram of the pressure riveting head corresponding to the forming tooling in the automatic rotary riveting machine for molybdenum cylinders in the embodiments of the present utility model;

[0028] In the figure: 1, frame; 2, first cross beam; 3, second cross beam; 4, rotary riveting driver; 5, pressure riveting head; 6, heater; 7, conductive plate; 701, displacement driving section; 702, inclined section; 703, heating section; 8, vehicle frame; 9, rotating member; 10, horizontal displacement driver; 11, positioning block; 12, vertical displacement driver; 13, servo motor; 14, driving shaft; 15, first rubber wheel; 16, driven shaft; 17, second rubber wheel; 18, bearing seat; 19, base; 20, column; 21, height adjustment hole; 22, adjustment plate; 23, control box; 24, remote control handle; 25, molybdenum cylinder; 26, forming tooling. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model.

[0031] In addition, it should be understood that for the convenience of description, the sizes of the various components shown in the accompanying drawings are not drawn in actual proportional relationships.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined or described in one drawing, it will not be necessary to further specifically discuss and describe it in the subsequent description of the drawings.

[0033] Embodiment:

[0034] The molybdenum cylinder riveting refers to coaxially sleeving two or more molybdenum cylinders. Rivet holes are pre-drilled on the circumference of the sleeved molybdenum cylinders at certain intervals. During spin riveting, manually place the rivets into the rivet holes and fix them. Then, push the feeding trolley to the spin riveting machine. The feeding trolley automatically rotates the molybdenum cylinder, and the spin riveting machine correspondingly rivets the rivets until all the rivets on the circumference of the molybdenum cylinder are spin riveted, and the sleeved molybdenum cylinders are fixed into one body. The control system in the present utility model is used to control the movements of the spin riveting machine driver and the feeding trolley servo motor, and can achieve automatic rotary riveting during the molybdenum cylinder riveting process.

[0035] As Figure 1 and Figure 2 shown, an automatic rotary molybdenum cylinder riveting machine includes: a spin riveting machine, and the spin riveting machine includes a frame 1, a first cross beam 2, a second cross beam 3, and a spin riveting driver 4; the first cross beam 2 and the second cross beam 3 are arranged along a first direction and extend along a second direction, and the second direction is perpendicular to the first direction (as Figure 1 and Figure 2 shown, the first direction is the vertical direction), the first cross beam 2 and the second cross beam 3 are both installed on the frame 1 and are arranged opposite to each other up and down, the spin riveting driver 4 is installed on the first cross beam 2, the output end of the spin riveting driver 4 has a riveting head 5, the second cross beam 3 has a forming tool corresponding to the riveting head 5, and there is a spin riveting interval between the riveting head 5 and the forming tool. In this embodiment, the spin riveting driver adopts the spin riveting drive part in a common pneumatic spin riveting machine. The riveting head is selected according to the rivet size, and the forming tool is pre-made according to the rivet forming shape. During riveting, the forming tool serves as the seat of the rivet, and the riveting rod in the spin riveting driver presses on the riveting head, thereby locally pressing the rivet and continuously swinging around the center until the rivet is formed. The rivets are made of tungsten molybdenum material. Due to the material characteristics of the tungsten molybdenum rivets, they cause relatively large wear and tear on the riveting tools. Therefore, both the riveting head and the forming tool are made of white strip steel, which has high hardness, is not easy to deform, and has strong wear resistance. The spin riveting interval between the riveting head 5 and the forming tool is used to place the molybdenum cylinder to be spin riveted.

[0036] Electric heating device, the electric heating device includes a heater 6, a conductive plate 7 and a conductive plate displacement assembly; the output end of the heater 6 is connected to the conductive plate 7, the conductive plate 7 has a first working position and a second working position, when in the first working position, the conductive plate 7 is located at the waiting position, when in the second working position, the conductive plate 7 is used to heat the rivet to be spin-riveted on the molybdenum cylinder 25, the conductive plate displacement assembly is arranged on the first cross beam 2 and is connected to the conductive plate 7, and is used to drive the conductive plate 7 to switch between the first working position and the second working position. Since tungsten and molybdenum belong to rare refractory metals, which have characteristics such as high melting point, high density, high hardness, etc., it is necessary to adopt the method of hot riveting during the riveting process. The heater can be a common resistance heater, and the conductive plate is the electric heating head of the heater. The heating temperature can be controlled and adjusted by the heater. When working: the conductive plate displacement assembly pushes the conductive plate to the rivet, quickly heats the rivet to a certain temperature, and then withdraws, and the spin-riveting driver 4 presses down to perform riveting.

[0037] Stocking trolley, the stocking trolley includes a vehicle frame 8 and a molybdenum cylinder rotating mechanism; the molybdenum cylinder rotating mechanism is installed on the vehicle frame 8, and is used to make the axis of the molybdenum cylinder extend along the second direction and drive the molybdenum cylinder to rotate at a set step length, and the set step length is equal to the arc length of the interval along the circumferential direction of the molybdenum cylinder of the prefabricated rivet holes on the molybdenum cylinder. The stocking trolley can make the molybdenum cylinder rotate around its own axis at a set step length, so as to cooperate with the spin-riveting driver and the conductive plate to realize automatic rotary riveting. Wheels are installed at the bottom of the vehicle frame to facilitate the movement of the stocking trolley.

[0038] Control system, the spin-riveting driver 4, the heater 6, the conductive plate displacement assembly and the molybdenum cylinder rotating mechanism are all connected to the control system. By controlling the rotation step length of the molybdenum cylinder, the process of heating the rivet by the conductive plate, the operation of the spin-riveting driver, etc. by the control system, the automatic rotary riveting of the molybdenum cylinder is realized, which greatly reduces the defects caused by human factors, and thus has good economic value and popularization and application value.

[0039] In this embodiment, as Figure 3As shown, the conductive plate displacement assembly includes a rotating member 9 and a horizontal displacement driver. Both the rotating member 9 and the horizontal displacement driver are disposed on the bottom side of the first cross beam 2. The first end of the conductive plate 7 is connected to the rotating member 9, and the output end of the horizontal displacement driver is connected to the conductive plate 7 to drive the conductive plate 7 to switch between the first working position and the second working position. By setting the horizontal displacement driver, the conductive plate 7 is driven to rotate around the rotating member 9 to realize the switching of the conductive plate 7 between the first working position and the second working position, complete the heating of the rivet, and avoid the riveting head during riveting. Specifically, in implementation, the rotating member 9 can be a rotating shaft. The first end of the rotating shaft is rotatably installed on the bottom side of the first cross beam 2, and the second end of the rotating shaft is fixedly connected to the conductive plate 7. As the horizontal displacement assembly pushes, the rotating shaft rotates to drive the conductive plate 7 to rotate, so as to realize the switching between the first working position and the second working position. Or the rotating shaft is fixed on the bottom side of the first cross beam 2, and the conductive plate 7 is sleeved and rotatably installed on the rotating shaft. Through the push of the horizontal displacement assembly, the conductive plate rotates around the rotating shaft to realize the switching between the first working position and the second working position.

[0040] The horizontal displacement driver 10 includes a first cylinder. The conductive plate displacement assembly further includes a positioning block 11. The positioning block 11 is installed on the lower side of the first cross beam 2, and the first cylinder is rotatably connected to the positioning block 11. Through this setting, when the first cylinder pushes the conductive plate to work, the conductive plate rotates around the rotating member as the axis, and at the same time, the first cylinder adjusts its own rotation angle following the moving direction of the conductive plate to prevent the deformation of the conductive plate.

[0041] In another embodiment, the horizontal displacement driver 10 includes a first cylinder. The conductive plate 7 is provided with a travel hole, and the shape of the travel hole is adapted to the moving path of the conductive plate. The output end of the first cylinder is connected to a pin shaft, and this pin shaft is inserted into the travel hole. When the first cylinder works, it pushes the pin shaft to move in the travel hole, thereby driving the conductive plate to switch between the first working position and the second working position.

[0042] The conductive plate displacement assembly further includes a vertical displacement driver 12. The vertical displacement driver 12 includes a second cylinder, which is installed on the first cross beam 2. The output end of the second cylinder cooperates with the conductive plate 7. When the conductive plate 7 is in the second working position, it presses down the conductive plate 7 to make it contact the rivet on the molybdenum cylinder. After the heating is completed, the second cylinder lifts up, and the conductive plate returns to its original position by its own elasticity.

[0043] Preferably, the conductive plate 7 includes a displacement driving section 701, an inclined section 702, and a heating section 703 that are connected in sequence; the displacement driving section 701 is connected to the heating section 703 through the inclined section 702. The displacement driving section 701 is connected to the output end of the first cylinder, and the output end of the second cylinder also corresponds to the displacement driving section 701. The heating section 703 is used to heat the rivets on the molybdenum cylinder. The inclined section 702 gradually approaches the lower tooling of the second cross beam along the length direction of the second cross beam. Segmenting the conductive plate 7 can shorten the downward pressing stroke of the second cylinder and facilitate the contact between the conductive plate and the rivets to be heated on the molybdenum cylinder.

[0044] The molybdenum cylinder rotating mechanism in this embodiment includes a servo motor 13, a driving rotation assembly, and a driven rotation assembly; the driving rotation assembly and the driven rotation assembly are installed on the vehicle frame 8 at intervals. The interval between the driving rotation assembly and the driven rotation assembly is used to place the molybdenum cylinder 25 and make the axis of the molybdenum cylinder extend along the second direction. The output end of the servo motor is connected to the driving rotation assembly to drive the molybdenum cylinder to rotate by a set step length through the driving rotation assembly.

[0045] The driving rotation assembly includes a driving shaft 14 and a first rubber wheel 15; the driven rotation assembly includes a driven shaft 16 and a second rubber wheel 17; both the driving shaft 14 and the driven shaft 15 are installed on the vehicle frame 8 through bearing seats 18. The driving shaft 15 and the driven shaft 16 are opposite and spaced apart, and this interval is used to place the molybdenum cylinder 25 and make the axis of the molybdenum cylinder extend along the second direction. The first rubber wheel 15 is installed on the driving shaft 14 at intervals, and the second rubber wheel 17 is installed on the driven shaft 16 at intervals. Both the first rubber wheel 15 and the second rubber wheel 17 are in contact with the molybdenum cylinder 25, and the output end of the servo motor 13 is connected to the driving shaft 14. Through this setting, the axis directions of the driving shaft and the transmission shaft are parallel to the axis direction of the molybdenum cylinder, and the first rubber wheel and the second rubber wheel are in contact with the molybdenum cylinder, which can drive the molybdenum cylinder to rotate and ensure the rotation stability of the molybdenum cylinder at the same time. Specifically, during implementation, the vehicle frame can be composed of spliced H-shaped steels, and the size and quantity of the H-shaped steels are determined according to the size of the molybdenum cylinder. Six bearing seats are placed on each side of the vehicle frame along the second direction. Transmission shafts are installed between the bearing seats, and solid rubber wheels are connected to the transmission shafts. A servo motor is set at one end of the vehicle frame, and the servo motor is connected to the transmission shaft on one side. There are eight nylon wheels under the vehicle frame.

[0046] In this embodiment, the frame includes a base 19 and columns 20. The columns 20 are installed on the base 19. The first crossbeam 2 is fixed to the columns 20. The second crossbeam 3 is installed on the columns 20 with adjustable position in the first direction. The columns 20 are provided with height adjustment holes 21 along their first direction. The first end of the second crossbeam 3 has an adjustment plate 22. The adjustment plate 22 is connected to the height adjustment holes 21 through adjustment bolts to achieve adjustable height of the second crossbeam. Through the above settings, the distance between the first crossbeam and the second crossbeam is adjustable. Before riveting, the rotary riveting spacing can be roughly adjusted for molybdenum cylinders with different diameters to improve the applicable range of the rotary riveting driver.

[0047] The control system includes a control box 23, a PLC controller, and a remote control handle 24. The PLC controller is located in the displacement control box 23. The remote control handle 24, the rotary riveting driver 4, the heater 6, the first cylinder, the second cylinder, and the servo motor are all connected to the PLC controller. By setting parameters through the PLC controller, when the distances between the first crossbeam 2 and the second crossbeam 3 of the riveting machine and the distance between the riveting head 5 and the forming tooling are adjusted to be appropriate, the molybdenum cylinder to be riveted is placed on the vehicle frame 8 and then pushed to the riveting interval. Press the remote control handle 24, the servo motor 13 works to drive the molybdenum cylinder to rotate. The first cylinder and the second cylinder cooperate to push the conductive plate 7 to the rivet to form electricity and quickly heat the rivet. After heating to a certain temperature (the time is set to about 3 seconds), it is withdrawn, and the rotary riveting driver 4 presses down to perform riveting, and the device completes a working cycle. The PLC controller calculates the circumferential interval arc length of the prefabricated rivet holes of the molybdenum cylinder along the circumference of the molybdenum cylinder and controls the rotation distance of the driving shaft so that each rotation of the molybdenum cylinder can align the prefabricated rivet holes with the forming tooling. When outputting parameters in the PLC control program and operating through the remote control handle, the rotation error is controlled within 0.008 MM to complete one-time rotary riveting.

[0048] The working method of this automatic rotary riveting machine for molybdenum cylinders is as follows:

[0049] S1. Manufacture a riveting head and forming tooling that match the molybdenum cylinder rivets. Install the riveting head on the rotary riveting driver, install the forming tooling on the working surface of the second crossbeam, and adjust to an appropriate riveting pressure to ensure one-time forming of the rotary riveting.

[0050] S2. Select a suitable H-shaped steel assembly group to assemble the loading trolley according to the diameter and length of the molybdenum cylinder.

[0051] S3. Calculate the interval arc length of the prefabricated rivet holes on the molybdenum cylinder, so that the rotation step of the molybdenum cylinder driven by the material placing trolley is equal to the interval arc length between the rivet holes. Input the parameters in the PLC control program. After the upper and lower toolings of the pneumatic riveting machine are adjusted properly and the molybdenum cylinder is placed on the material placing trolley, it is pushed to the riveting tooling at the fixed table of the riveting machine. Press the remote control handle to rotate the molybdenum cylinder automatically. The conductive plate heats the rivet. After heating to a certain temperature (the time is set to about 3 seconds), the conductive plate is withdrawn, and the riveting head presses down to perform riveting. The equipment works in a cycle.

[0052] The adjustment method of the riveting machine includes the following steps:

[0053] (1) Loosen the screws on the side of the column (note: the upper and lower two screws are loosened, and the middle screw is tightened). Use a ratchet wrench to adjust the distance between the first cross beam and the second cross beam. Rotate the adjustable stroke fine-tuning knob above the riveting driver counterclockwise (looking from top to bottom) to the uppermost position. Install the riveting head and the forming tooling. Press the riveting control switch. At this time, the riveting driver rotates and moves downward to the lowest point (alignment of dies). Use a knob wrench to roughly adjust the height between the riveting head and the forming tooling to about 1 mm.

[0054] (2) Slowly adjust the position of the forming tooling to align the rotation center point of the riveting head with the surface center point of the forming tooling (observe from the front and back and left and right, that is, in the "X" direction and "Y" direction). After confirming that the center points are aligned, fix the forming tooling on the workbench (tighten the tooling nut). At this time, loosen the middle screw at the back of the column and tighten the upper and lower screws. Push the material placing trolley carrying the molybdenum cylinder to the forming tooling so that the rivet falls into the forming tooling. Press the manual switch of the riveting driver, and the machine completes a reciprocating motion. If the riveting head does not touch the rivet at the beginning, adjust the scale turntable at the upper end of the riveting head (adjust clockwise, and it is best to adjust 1 / 3 of a turn each time). The riveting head gradually rotates downward for riveting until the rivet is completely riveted. Lock the fastening screw on the scale turntable to meet the riveting requirements. Then turn the control rotation switch of the equipment to "automatic", set the holding pressure time of the riveting to about 3S, and then each time the manual switch is toggled, the equipment automatically completes a riveting operation.

[0055] This automatic rotating riveting machine for molybdenum cylinders has a simple usage method and convenient operation. The length of the material placing trolley can be selected according to the diameter and length of the molybdenum cylinder. The servo motor has high precision, reduces the rotation error of the rivet spacing, avoids the alignment of the rivets, and achieves one-time riveting with stable alignment and high precision, greatly reducing defects such as missed riveting and loose rivets caused by human factors. When this mechanical equipment is used, only two people are required to operate, reducing the investment in manpower, material resources and financial resources, improving the labor efficiency per capita, and having good economic value.

[0056] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A molybdenum tube automatic rotary riveting machine, characterized in that: include: A rotary riveting machine, comprising a frame, a first crossbeam, a second crossbeam and a rotary riveting driver; The first crossbeam and the second crossbeam are arranged along a first direction and extend along a second direction, the second direction is perpendicular to the first direction, the first crossbeam and the second crossbeam are both installed on the frame and are arranged opposite to each other up and down, the rotary riveting driver is installed on the first crossbeam, the output end of the rotary riveting driver has a rivet head, the second crossbeam has a forming tool corresponding to the rivet head, and a rotary riveting interval is provided between the rivet head and the forming tool; An electric heating device, the electric heating device comprising a heater, a conductive plate and a conductive plate displacement assembly; the output end of the heater is connected to the conductive plate, the conductive plate has a first station and a second station, when in the first station, the conductive plate is in a waiting position, when in the second station, the conductive plate is used to heat the rivet to be riveted on the molybdenum cylinder, the conductive plate displacement assembly is arranged on the first crossbeam and connected to the conductive plate, and is used to drive the conductive plate to switch between the first station and the second station; A material placing trolley, the material placing trolley comprising a frame and a molybdenum cylinder rotating mechanism; The molybdenum cylinder rotating mechanism is installed on the frame, and is used to extend the axis of the molybdenum cylinder along the second direction, and drive the molybdenum cylinder to rotate according to a set step length, and the set step length is equal to the arc length of the interval of the prefabricated rivet holes on the molybdenum cylinder along the circumference of the molybdenum cylinder; The control system, the rotary riveting driver, the heater, the conductive plate displacement assembly and the molybdenum cylinder rotating mechanism are all connected to the control system.

2. The molybdenum tube automatic rotary riveting machine according to claim 1, characterized in that: The conductive plate displacement assembly includes a rotating member and a horizontal displacement driver, both of which are arranged on the bottom side of the first beam, the first end of the conductive plate is connected to the rotating member, and the output end of the horizontal displacement driver is connected to the conductive plate to drive the conductive plate to switch between the first station and the second station.

3. The molybdenum tube automatic rotary riveting machine according to claim 2 is characterized in that: The horizontal displacement driver includes a first cylinder, and the conductive plate displacement assembly also includes a positioning block, which is installed on the lower side of the first crossbeam, and the first cylinder is rotatably connected to the positioning block.

4. The molybdenum tube automatic rotary riveting machine according to claim 2, characterized in that: It also includes a vertical displacement driver, which is installed on the first crossbeam. The output end of the vertical displacement driver cooperates with the conductive plate to press the conductive plate down to make it contact the rivet on the molybdenum cylinder when the conductive plate is in the second position.

5. The molybdenum tube automatic rotary riveting machine according to claim 1, characterized in that: The molybdenum cylinder rotating mechanism includes a servo motor, an active rotating component and a driven rotating component; the active rotating component and the driven rotating component are installed on the frame at intervals, the interval between the active rotating component and the driven rotating component is used to place the molybdenum cylinder and make the axis of the molybdenum cylinder extend along the second direction, and the output end of the servo motor is connected to the active rotating component to drive the molybdenum cylinder to rotate according to the set step length through the active rotating component.

6. The molybdenum tube automatic rotary riveting machine according to claim 5, characterized in that: The active rotating component includes a driving shaft and a first rubber wheel; the driven rotating component includes a driven shaft and a second rubber wheel; the driving shaft and the driven shaft are arranged opposite to each other and at intervals on the frame, the interval between the driving shaft and the transmission shaft is used to place a molybdenum cylinder, the first rubber wheel is installed at intervals on the driving shaft, and the second rubber wheel is installed at intervals on the driven shaft, the first rubber wheel and the second rubber wheel are both in contact with the molybdenum cylinder, and the output end of the servo motor is connected to the driving shaft.

7. The molybdenum tube automatic rotary riveting machine according to claim 5 or 6, characterized in that: Wheels are installed at the bottom of the frame.

8. The molybdenum tube automatic rotary riveting machine according to claim 1, characterized in that: The frame comprises a base and a column, wherein the column is installed on the base, the first crossbeam is fixed on the column, and the second crossbeam is installed on the column in an adjustable manner along a first direction.

9. The molybdenum tube automatic rotary riveting machine according to claim 8, characterized in that: The column is provided with a height adjustment hole along a first direction thereof, and the first end of the second crossbeam is provided with an adjustment plate, and the adjustment plate is connected to the height adjustment hole through an adjustment bolt to achieve height adjustment of the second crossbeam.

10. The molybdenum tube automatic rotary riveting machine according to claim 1, characterized in that: The control system comprises a control box, a PLC controller and a remote control handle; the PLC controller is located in the control box, and the remote control handle, the rotary riveting driver, the heater, the conductive plate displacement assembly and the molybdenum cylinder rotating mechanism are all connected to the PLC controller.

Images