High-precision servo riveting machine

Abstract

The utility model discloses a high accuracy servo riveting machine belongs to riveting machine technical field, include: main body fixed plate, riveting piece, install on main body fixed plate, sheet metal shield, fix on main body fixed plate, and cover riveting piece, the riveting piece includes: first fixed seat, fix one side of main body fixed plate, planetary reducer, install on first fixed seat, stroke servo motor installs on planetary reducer, and stroke servo motor's output shaft is fixed with planetary reducer's input. The utility model discloses, through the integration stroke servo motor, screw nut module, main shaft servo motor, main shaft and riveting head with main body fixed plate's sheet metal shield inside, make the whole degree of integration height, structural distribution is more fine, and need not hydraulic or pneumatic drive mode drive riveting rod on riveting head lifting riveting, to reduce the space occupation area of whole riveting machine, and reduce the pollution and noise of whole equipment, to improve the practicability of whole equipment.

Description

Technical Field

[0001] This utility model relates to the field of riveting machine technology, and in particular to a high-precision servo riveting machine. Background Technology

[0002] A riveting machine is a new type of riveting equipment developed based on the principle of cold rolling. It refers to mechanical equipment that can rivet items together. The equipment has a compact structure, stable performance, and is convenient and safe to operate. The riveting machine mainly relies on rotation and pressure to complete the assembly.

[0003] In the riveting process, existing riveting machines are usually equipped with hydraulic or pneumatic devices to drive the machine's lifting and lowering. For example, the utility model disclosed in CN220591452U discloses a riveting machine including a frame, a hydraulic cylinder fixedly connected to the top of the frame, a hydraulic rod at one end of the hydraulic cylinder, a pressure head at the bottom of the hydraulic rod, a base on the outer surface of the frame, a support rod fixedly connected to the top of the base, a lifting sleeve sleeved on the outer surface of the support rod, a top pressure plate fixedly connected to the top of the lifting sleeve, and a positioning rod inserted into the outer surface of the lifting sleeve. In this utility model, when it is necessary to rivet a rod-shaped workpiece, the hydraulic cylinder is activated to drive the hydraulic rod to extend and retract downwards, thereby moving the pressure head downwards to press the workpiece on the top of the top pressure plate.

[0004] However, the riveting machine described in the above application, which uses hydraulic power to drive the pressure head down for crimping, has the following drawbacks: after a period of operation, the hydraulic drive is prone to air and oil leaks, causing environmental pollution; in addition, the hydraulic drive requires oil storage equipment, which occupies a large area and generates a lot of noise; and it cannot precisely and flexibly control the stroke and pressure of the cap head. Therefore, a high-precision servo riveting machine is proposed to solve the above problems. Utility Model Content

[0005] (a) Purpose of the utility model

[0006] To address the technical problems existing in the background art, this utility model proposes a high-precision servo riveting machine, which has the advantages of small footprint, low pollution, and more convenient and precise stroke and pressure adjustment. It solves the problems of inconvenient stroke and pressure adjustment, large overall footprint, and easy pollution.

[0007] (II) Technical Solution

[0008] This utility model provides a high-precision servo riveting machine, comprising:

[0009] Main body fixing plate;

[0010] Riveted components are mounted on the main body fixing plate.

[0011] Sheet metal protective cover, fixed to the main body fixing plate, and covering the riveted parts;

[0012] The riveting component includes: a first fixed base, fixed to one side of the main fixed plate; a planetary reducer, mounted on the first fixed base; and a stroke servo motor mounted on the planetary reducer, with the output shaft of the stroke servo motor fixed to the input end of the planetary reducer.

[0013] The follower plate is slidably connected to one side of the main fixed plate and located below the first fixed seat; the lower fixed plate is fixedly connected to one side of the main fixed plate and located below the follower plate; the lead screw and nut module is installed on the output end of the stroke servo motor, and its lifting end is fixed to the follower plate; the first bearing module is installed on the lead screw and nut module.

[0014] The second fixed base is fixed to the follower plate; the spindle servo motor is fixed to the upper surface of the second fixed base; the T-shaped bushing is fixed to the lower surface of the follower plate and is located directly below the second fixed base, penetrating the lower fixed plate; the spindle is fixed to the output shaft of the spindle servo motor via a coupling and penetrates the T-shaped bushing; the rivet head is fixed to one end of the spindle that penetrates the lower fixed plate; the rivet rod is fixedly installed at the lower end of the rivet head; the bearing seat is fixedly installed on the lower fixed plate and is sleeved on the T-shaped bushing; the graphite copper tapered sleeve is installed on the outer surface of the lower end of the T-shaped bushing and extends into the bearing seat;

[0015] The second bearing component is mounted on the main shaft.

[0016] Preferably, the lead screw and nut module consists of a lead screw and a nut. The upper end of the lead screw is fixed to the output shaft of the planetary reducer via a coupling, and its lower end passes through the first fixed seat and the follower plate in sequence. The lower end of the lead screw is rotatably connected to the lower fixed plate. The nut is threaded onto the lead screw and fixed to the follower plate.

[0017] Preferably, the first bearing module consists of an angular contact bearing and a first planar bearing. The angular contact bearing is installed at the point where the first fixed seat is penetrated by the lead screw and is rotatably connected to the lead screw. The first planar bearing is installed on the lower surface of the first fixed seat and is rotatably connected to the lead screw.

[0018] Preferably, two sets of linear modules are provided on the side where the main fixing plate is connected to the follower plate, and each set of linear modules consists of a slide rod and a slide sleeve. Each slide rod is fixedly connected between the main fixing plate and the lower fixing plate and passes through the follower plate. Each slide sleeve is slidably connected to the slide rod and fixed to the follower plate.

[0019] Preferably, the upper end of the T-shaped bushing has a T-shaped cross-section, the inner peripheral wall of the bearing seat has a tapered groove for accommodating the graphite copper tapered sleeve, the outer surface of the lower end of the T-shaped bushing is fixedly connected to a support ring, and the graphite copper tapered sleeve is fixedly installed on the support ring. The interior of the T-shaped bushing has an installation cavity for installing a second bearing component, and the installation cavity is I-shaped.

[0020] Preferably, the second bearing component consists of a support bearing, a second planar bearing, and a deep groove bearing. The support bearing is installed at the upper end of the mounting cavity and is rotatably connected to the main shaft. The second planar bearing and the deep groove bearing are installed sequentially from top to bottom at the lower end of the mounting cavity and are rotatably connected to the main shaft. The diameter of the middle section of the mounting cavity is adapted to the diameter of the main shaft.

[0021] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0022] 1. This high-precision servo riveting machine integrates a stroke servo motor, a lead screw and nut module, a spindle servo motor, and a sheet metal protective cover for the spindle and riveting head and the main body fixing plate. This results in a high degree of overall integration and a more refined structural distribution. Furthermore, it eliminates the need for hydraulic or pneumatic drive to raise and lower the rivet rod on the rivet head, thereby reducing the space occupied by the entire riveting machine and minimizing pollution and noise, thus improving the practicality of the entire equipment.

[0023] 2. This high-precision servo riveting machine adjusts the spindle speed and the lifting position of the spindle through a stroke servo motor and a lead screw and nut module, thereby achieving precise adjustment of the rivet rod output torque and riveting orientation, thus improving the riveting effect of the entire riveting machine.

[0024] 3. This high-precision servo riveting machine overcomes the shortcomings of traditional pneumatic and hydraulic riveting machines, which can only perform riveting with a single fixed stroke. This riveting machine can perform riveting of any floating size, solving many riveting problems in the C industry. At the same time, this riveting machine can be used for multiple purposes. By changing the rotating cap, it can also be used as an edge banding machine to improve the adaptability of the entire equipment. Attached Figure Description

[0025] Figure 1 This is a perspective view of the overall structure of this utility model;

[0026] Figure 2 This is a three-dimensional sectional view of the overall structure of this utility model;

[0027] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle.

[0028] Reference numerals: 1. Main body fixing plate; 2. Riveting component; 21. Stroke servo motor; 22. Planetary reducer; 23. First fixed seat; 24. Angular contact bearing; 25. First plane bearing; 26. Lead screw and nut module; 27. Lower fixing plate; 28. Spindle servo motor; 29. ​​Second fixed seat; 210. Follower plate; 211. Bushing; 212. Spindle; 213. Support bearing; 214. Second plane bearing; 215. Rivet head; 216. Rivet rod; 217. Deep groove bearing; 218. Shaft seat; 219. Support ring; 220. Graphite copper tapered sleeve; 3. Sheet metal protective cover; 4. Linear module. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, such as welding, riveting, or bonding; it can also be a detachable connection, such as threaded connection, keyed connection, or pin connection; or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] like Figure 1-3 As shown, the present invention proposes a high-precision servo riveting machine, comprising:

[0033] Main body fixing plate 1;

[0034] Riveting component 2 is mounted on the main body fixing plate 1.

[0035] Sheet metal cover 3 is fixed on the main body fixing plate 1 and covers the riveted parts 2;

[0036] The riveting component 2 includes: a first fixed base 23, fixed on one side of the main body fixed plate 1; a planetary reducer 22, mounted on the first fixed base 23; and a stroke servo motor 21 mounted on the planetary reducer 22, with the output shaft of the stroke servo motor 21 fixed to the input end of the planetary reducer 22.

[0037] The follower plate 210 is slidably connected to one side of the main body fixing plate 1 and located below the first fixing seat 23; the lower fixing plate 27 is fixedly connected to one side of the main body fixing plate 1 and located below the follower plate 210; the lead screw nut module 26 is installed at the output end of the stroke servo motor 21, and its lifting end is fixed to the follower plate 210; the first bearing module is installed on the lead screw nut module 26.

[0038] In this embodiment, since the input end of the planetary reducer 22 is fixed to the output shaft of the stroke servo motor 21, the stroke servo motor 21 provides power to the planetary reducer 22 and adjusts the output power to drive the lead screw nut module 26 to rotate and lift. Thus, the lifting end of the lead screw nut module 26 drives the follower plate 210 to adjust its position along the vertical and horizontal plane.

[0039] It should be noted that the lead screw and nut module 26 consists of a lead screw and a nut. The upper end of the lead screw is fixed to the output shaft of the planetary reducer 22 via a coupling, and its lower end passes through the first fixed seat 23 and the follower plate 210 in sequence. The lower end of the lead screw is rotatably connected to the lower fixed plate 27. The nut is threadedly connected to the lead screw and fixed to the follower plate 210. After the stroke servo motor 21 drives the lead screw to rotate through the output end of the planetary reducer 22, the follower plate 210 can be adjusted up and down along the vertical and horizontal planes by the nut threadedly connected to the lead screw.

[0040] The first bearing module consists of an angular contact bearing 24 and a first planar bearing 25. The angular contact bearing 24 is installed at the point where the first fixed seat 23 is penetrated by the lead screw and is rotatably connected to the lead screw. The first planar bearing 25 is installed on the lower surface of the first fixed seat 23 and is rotatably connected to the lead screw.

[0041] The first bearing module is fixed to the lead screw by the inner ring of the angular contact bearing 24 and the first plane bearing 25, while the outer ring is fixed to the first fixed seat 23;

[0042] The angular contact bearing 24 and the first plane bearing 25 provide rotational support for the lead screw, making the lead screw more stable during rotation and more stable and precise when driving the nut to rise and fall.

[0043] In addition, two sets of linear modules 4 are provided on the side where the main fixed plate 1 is connected to the follower plate 210. Each set of linear modules 4 consists of a slide rod and a sliding sleeve. Each slide rod is fixedly connected between the main fixed plate 1 and the lower fixed plate 27 and passes through the follower plate 210. Each sliding sleeve is slidably connected to the slide rod and fixed to the follower plate 210. By sliding the sliding sleeve on the slide rod, the follower plate 210 is supported and guided during the lifting process, thereby further improving the stability of the follower plate 210 during the lifting and adjustment process.

[0044] In an optional embodiment, a second fixed base 29 is fixed to a follower plate 210; a spindle servo motor 28 is fixed to the upper surface of the second fixed base 29; a T-shaped bushing 211 is fixed to the lower surface of the follower plate 210 and located directly below the second fixed base 29, penetrating the lower fixed plate 27; a spindle 212 is fixed to the output shaft of the spindle servo motor 28 via a coupling and penetrates the T-shaped bushing 211; a rivet head 215 is fixed to one end of the spindle 212 penetrating the lower fixed plate 27; a rivet rod 216 is fixedly installed at the lower end of the rivet head 215; a bearing seat 218 is fixedly installed on the lower fixed plate 27 and sleeved on the T-shaped bushing 211; a graphite copper tapered sleeve 220 is installed on the outer surface of the lower end of the T-shaped bushing 211 and extends into the bearing seat 218.

[0045] The second bearing component is mounted on the main shaft 212.

[0046] In this embodiment, during the process of the follower plate 210 driving the spindle servo motor 28 on the second fixed shaft 29 to rise and fall, the spindle 212 driven by the spindle servo motor 28 is used to drive the rivet head 215 and rivet rod 216 to perform riveting processing at the riveting joint.

[0047] It should be noted that the upper end of the T-shaped bushing 211 has a T-shaped cross-section, and the inner circumferential wall of the bearing seat 218 has a tapered groove for accommodating the graphite copper tapered sleeve 220. The outer surface of the lower end of the T-shaped bushing 211 is fixedly connected to the support ring 219, and the graphite copper tapered sleeve 220 is fixedly installed on the support ring 219. The interior of the T-shaped bushing 211 has an installation cavity for installing the second bearing component, and the installation cavity is I-shaped, so that when the T-shaped bushing 211 descends on the follower plate 210, its T-shaped end cannot completely pass through the bearing seat 218 and will be blocked by the bearing seat 218. The graphite copper tapered sleeve 220 on the outer surface of the lower end of the T-shaped bushing 211 will extend into the bearing seat 218 during the process of rising with the T-shaped bushing 211 and will be blocked by the bearing seat 218, thereby precisely limiting the maximum stroke of the main shaft 212 and the T-shaped bushing 211.

[0048] The second bearing component consists of a support bearing 213, a second planar bearing 214, and a deep groove bearing 217. The support bearing 213 is installed at the upper end of the mounting cavity and is rotatably connected to the main shaft 212. The second planar bearing 214 and the deep groove bearing 217 are installed sequentially from top to bottom at the lower end of the mounting cavity and are rotatably connected to the main shaft 212. The diameter of the middle section of the mounting cavity is matched with the diameter of the main shaft 212.

[0049] The second bearing component is fixedly connected to the main shaft 212 by the inner ring of the support bearing 213, the second flat bearing 214 and the deep groove bearing 217, while the outer ring is fixed in the mounting cavity of the T-shaped bushing 211.

[0050] The main shaft 212 rotating inside the T-shaped bushing 211 is stably supported by the support bearing 213, the second plane bearing 214 and the deep groove bearing 217 located in the I-shaped mounting cavity of the T-shaped bushing 211, so that the main shaft 212 can rotate stably and drive the rivet head 215 and the rivet rod 216 to rivet stably.

[0051] The working principle in the above embodiments is as follows:

[0052] Step 1: Device Initialization and Location Setting

[0053] The operator sets the parameters required for this riveting process through the control system, which mainly include: the target pressing stroke depth of the rivet head 215, the target speed of the spindle, and the pressure and torque curves at each stage of the riveting process.

[0054] Step 2: Rapid descent and precise positioning of the rivet joint

[0055] Command issuance: The control system sends a command to the stroke servo motor 21;

[0056] Power transmission and deceleration: When the stroke servo motor 21 starts, its output power is reduced and the torque is increased by the planetary reducer 22, and then drives the lead screw in the lead screw nut module 26 to rotate.

[0057] Precision linear motion: The rotating lead screw converts the rotational motion into precise linear lifting motion through the nut that is threaded to it. The nut drives the second fixed seat 29, the spindle servo motor 28, the T-shaped bushing 211, the spindle 212, the rivet head 215 and the rivet rod 216 on the follower plate 210 to move steadily and quickly toward the workpiece along the guide of the linear module 4.

[0058] Stroke limit and protection: When the graphite copper tapered sleeve 220 at the lower part of the T-type bushing 211 and its upper T-shaped end are in contact with the bearing seat 218, it is used to limit its maximum lifting stroke.

[0059] Step 3: Core Process Stage of Riveting and Forming

[0060] During this stage, the stroke servo motor 21 and the spindle servo motor 28 work together:

[0061] Rotation and rolling: The spindle servo motor 28 drives the spindle 212 to rotate at a specific speed according to the setting, which drives the rivet head 215 and rivet rod 216 to rotate at high speed;

[0062] Precise pressure control: Meanwhile, the stroke servo motor 21 continues to work, applying a precise, controllable, and stable axial pressure to the rotating riveting assembly through the lead screw and nut module 26. This pressure is monitored and adjusted in real time, and torque / pressure closed-loop control is usually achieved through the current feedback of the servo motor.

[0063] Material plastic flow: Under the combined action of continuous rotation and rolling of the rivet 216 and axial pressure, the rivet or workpiece local metal undergoes uniform and smooth plastic deformation, thereby achieving high-quality riveting or edge sealing connection. Throughout the process, the support bearing 213, the second plane bearing 214 and the deep groove bearing 217 ensure the stable rotation of the main shaft 212 when subjected to axial and radial combined forces.

[0064] Step 4: Riveting completed and repositioned

[0065] Once the preset riveting depth, pressure, or time is reached, the control system issues a command.

[0066] Spindle 212 stops: Spindle servo motor 28 stops rotating;

[0067] Rivet head 215 lifting: The stroke servo motor 21 reverses, and the entire riveting assembly is smoothly lifted to the initial safe height through the lead screw and nut module 26, waiting for the next work cycle.

[0068] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision servo riveting machine, characterized in that, include; Main body fixing plate (1); The riveting component (2) is installed on the main body fixing plate (1). Sheet metal cover (3) is fixed on the main body fixing plate (1) and covers the riveting parts (2). The riveting component (2) includes: a first fixed seat (23), fixed on one side of the main fixed plate (1); a planetary reducer (22), mounted on the first fixed seat (23); a stroke servo motor (21) mounted on the planetary reducer (22), and the output shaft of the stroke servo motor (21) is fixed to the input end of the planetary reducer (22); Follower plate (210) is slidably connected to one side of main body fixed plate (1) and located below the first fixed seat (23); lower fixed plate (27) is fixedly connected to one side of main body fixed plate (1) and located below follower plate (210); screw nut module (26) is installed on the output end of stroke servo motor (21) and its lifting end is fixed to follower plate (210); first bearing module is installed on screw nut module (26); The second fixed seat (29) is fixed on the follower plate (210); the spindle servo motor (28) is fixed on the upper surface of the second fixed seat (29); the T-shaped bushing (211) is fixed on the lower surface of the follower plate (210) and located directly below the second fixed seat (29), and passes through the lower fixed plate (27); the spindle (212) is fixed on the output shaft of the spindle servo motor (28) by a coupling and passes through the T-shaped bushing (211); the rivet head (215) is fixed on one end of the spindle (212) that passes through the lower fixed plate (27); the rivet rod (216) is fixedly installed on the lower end of the rivet head (215); the bearing seat (218) is fixedly installed on the lower fixed plate (27) and sleeved on the T-shaped bushing (211); the graphite copper tapered sleeve (220) is installed on the outer surface of the lower end of the T-shaped bushing (211) and extends into the bearing seat (218); The second bearing component is mounted on the main shaft (212).

2. The high-precision servo riveting machine according to claim 1, characterized in that, The lead screw and nut module (26) consists of a lead screw and a nut. The upper end of the lead screw is fixed to the output shaft of the planetary reducer (22) through a coupling, and its lower end passes through the first fixed seat (23) and the follower plate (210) in sequence. The lower end of the lead screw is rotatably connected to the lower fixed plate (27). The nut is threaded on the lead screw and fixed to the follower plate (210).

3. A high-precision servo riveting machine according to claim 2, characterized in that, The first bearing module consists of an angular contact bearing (24) and a first planar bearing (25). The angular contact bearing (24) is installed at the point through which the lead screw passes through the first fixed seat (23) and is rotatably connected to the lead screw. The first planar bearing (25) is installed on the lower surface of the first fixed seat (23) and is rotatably connected to the lead screw.

4. A high-precision servo riveting machine according to claim 1, characterized in that, Two sets of linear modules (4) are provided on the side where the main fixing plate (1) is connected to the follower plate (210). Each set of linear modules (4) consists of a sliding rod and a sliding sleeve. Each sliding rod is fixedly connected between the main fixing plate (1) and the lower fixing plate (27) and passes through the follower plate (210). Each sliding sleeve is slidably connected to the sliding rod and fixed to the follower plate (210).

5. A high-precision servo riveting machine according to claim 1, characterized in that, The upper end of the T-shaped bushing (211) has a T-shaped cross-section. The inner circumferential wall of the bearing seat (218) is provided with a tapered groove for accommodating the graphite copper tapered sleeve (220). The outer surface of the lower end of the T-shaped bushing (211) is fixedly connected to the support ring (219), and the graphite copper tapered sleeve (220) is fixedly installed on the support ring (219). The interior of the T-shaped bushing (211) is provided with an installation cavity for installing the second bearing component, and the installation cavity is I-shaped.

6. A high-precision servo riveting machine according to claim 5, characterized in that, The second bearing component consists of a support bearing (213), a second planar bearing (214), and a deep groove bearing (217). The support bearing (213) is installed at the upper end of the mounting cavity and is rotatably connected to the main shaft (212). The second planar bearing (214) and the deep groove bearing (217) are installed sequentially from top to bottom at the lower end of the mounting cavity and are rotatably connected to the main shaft (212). The diameter of the middle section of the mounting cavity is matched with the diameter of the main shaft (212).

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