Neckdown press fitting device and method

Abstract

The application discloses a necking press-fitting device in the field of mechanical assembly, which comprises a first rack, a lower press head movably arranged on the first rack, a second rack fixed on the first rack, an upper press head fixed on the second rack and arranged coaxially with the lower press head in space, the lower press head being forced to approach or move away from the upper press head, a driving body movably arranged on the second rack through a follow-up assembly, and a compression assembly arranged at the output end of the driving body, wherein the driving body drives the compression assembly to be tightened in two directions, and the spatial position of the driving body is synchronously switched with the lower press head; the necking press-fitting device realizes the necking closing effect on the bushing through the compression assembly, and the necking bushing is placed in the mounting port of the swing arm under the driving of the follow-up assembly and the synchronous movement of the lower press head, so that mechanical damage caused by conventional installation is avoided, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] This application relates to the field of mechanical assembly technology, specifically to a necking and pressing device and method. Background Technology

[0002] With industrial development, the output of manufacturing machinery and equipment is increasing. Most of these machines use swing arms, which are mounted on the main body of the equipment to swing within a certain range, facilitating the movement of grippers and other equipment. Swing arms usually require bushings for installation during assembly. These bushings have axial openings. The conventional installation method uses upper and lower pressure blocks to press them together. This method can cause some damage to the mounting opening of the swing arm and the surface of the bushing during the pressing process, which will affect the service life of the equipment and the steering and movement performance of the product. How to achieve non-destructive installation is a problem that technicians need to solve. Summary of the Invention

[0003] The purpose of this application is to provide a narrowing press-fitting device and method to solve the defects caused by conventional press-fitting of bushings in the prior art.

[0004] To achieve the above objectives, this application employs the following technical solution: In a first aspect, this application discloses a necking and pressing device, which includes: A first frame, on which a downward pressure head is movably mounted; A second frame is fixed to the first frame, and an upper pressure head is fixed on the second frame and arranged coaxially with the lower pressure head in space. The lower pressure head is subjected to force to move closer to / away from the upper pressure head. A drive unit is movably mounted on the second frame via a follower component, and a compression component is provided at the output end of the drive unit; wherein the drive unit drives the compression component to tighten bidirectionally, and the spatial positions of the drive unit and the lower pressure head are switched synchronously.

[0005] In a further embodiment of this application, a press-fit cylinder is fixed on the first frame, and the telescopic rod of the press-fit cylinder is fixedly connected to the lower press head.

[0006] In a further embodiment of this application, the follower component includes a first connector fixed to the first frame, a second connector slidably disposed on the first connector via a slide rail mechanism, the second connector being fixedly connected to the drive body, a follower cylinder being fixed on the first connector, and the telescopic rod of the follower cylinder being connected to the second connector.

[0007] In a further embodiment of this application, the compression assembly includes a first pressure block and a second pressure block, and the opposing surfaces of the first pressure block and the second pressure block are provided with shaping openings. The two shaping openings are closed by force to form a cavity. The first pressure block is connected to the first output end of the driving body, and the second pressure block is connected to the second output end of the driving body. The driving body synchronously drives the first output end and the second output end to move apart or close together, so that the first pressure block and the second pressure block separate or merge.

[0008] In a further embodiment, the driving body includes a motor, a forward and reverse threaded rod, and a mounting base. The mounting base fixes the follower assembly, and the motor is fixed to the mounting base. One end of the forward and reverse threaded rod is driven and mounted on the output shaft of the motor. A first nut is threadedly connected to the forward thread section of the forward and reverse threaded rod, and a second nut is threadedly connected to the reverse thread section. At least two first guide posts and two second guide posts are movably mounted on the mounting base. The first and second guide posts are parallel to the forward and reverse threaded rod. The first nut is fixedly connected to one end of the two first guide posts near the motor, and the first pressure block is fixedly connected to the other end. The second nut is fixedly connected to one end of the two second guide posts near the motor, and the second pressure block is fixedly connected to the other end.

[0009] A further proposed solution involves installing multiple first and second guide posts at equal intervals on the mounting base.

[0010] In a further embodiment of this application, the compression assembly is provided with a positioning groove, and a positioning element is slidably disposed in the positioning groove, the positioning element being used to position the notch of the bushing on the lower pressure head.

[0011] In a further embodiment of this application, the arrangement direction of the lower pressure head and the upper pressure head is perpendicular to the arrangement direction of the driving body.

[0012] In a further embodiment of this application, a temporary storage station is provided on the first rack.

[0013] Secondly, this application discloses a pressing method, which includes... Place the bushing on the lower pressure head and fix the mounting port of the swing arm to the upper pressure head; The drive unit is activated to drive the compression assembly to perform bidirectional tightening until the notch on the bushing is closed. The synchronous start-up of the follow-up component drives the drive body to move towards the upper pressure head. At the same time, the lower pressure head moves synchronously towards the upper pressure head under the action of external force. The lower pressure head presses the bushing into the mounting port of the swing arm until the bushing is disengaged from the compression component and deformed and fixed in the mounting port.

[0014] The beneficial effects of this application are as follows: This application incorporates a compression component that, through the movement of a drive body, closes the notch in the bushing. Driven by a follower component, it moves synchronously with the lower pressure head, placing the narrowed bushing into the mounting port of the swing arm. At this point, the relative contact surfaces of the mounting port and the bushing do not generate significant friction. Finally, after releasing the compression component, the bushing returns to its original shape and is firmly fixed inside the mounting port. This avoids mechanical damage caused by conventional installation and enhances the service life of the equipment.

[0015] The drive unit uses a two-way lead screw to perform bidirectional synchronous narrowing operation on the first and second pressure blocks. At this time, the synchronous movement of the first and second pressure blocks can accelerate the narrowing efficiency of the bushing and make the compression process more stable, which facilitates the later installation with the mounting port on the swing arm. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the necking and pressing device in the embodiments of this application; Figure 2 This is a schematic diagram of the necking and pressing device from another perspective in the embodiments of this application; Figure 3 This is a schematic diagram illustrating the structure of the necking component in the embodiments of this application; Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0017] The components are as follows: 1. First frame; 2. Second frame; 3. Drive body; 4. Follower assembly; 5. Compression assembly; 11. Press cylinder; 12. Lower press head; 100. Swing arm; 200. Bushing; 21. Upper press head; 31. Positive and negative threaded rod; 32. Motor; 33. First nut; 34. First guide post; 35. Second nut; 36. Second guide post; 37. Mounting base; 41. First connector; 42. Second connector; 43. Follower cylinder; 51. First pressure block; 52. Second pressure block; 511. Positioning component; 512. Positioning groove. Detailed Implementation Example 1

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use.

[0019] like Figure 1 and Figure 2As shown, this embodiment discloses a necking and pressing device, which can realize the non-destructive installation of bushing 200 and swing arm 100. The device includes: a first frame 1, a second frame 2, and a drive body 3. A lower pressing head 12 is movably mounted on the first frame 1; the second frame 2 is vertically fixed on the first frame 1, and an upper pressing head 21 is fixed on the second frame 2 and spatially coaxially arranged with the lower pressing head 12. When the lower pressing head 12 is subjected to force, it can move closer to / away from the upper pressing head 21; the two pressing heads work together to smoothly install the bushing 200. The drive body 3 is moved and set on the second frame 2 through a follower component 4. A compression component 5 is provided at the output end of the drive body 3; when the drive body 3 is working, the compression component 5 can be tightened in both directions, and the spatial positions of the drive body 3 and the lower pressing head 12 are switched synchronously.

[0020] In use, the bushing 200 is placed on the compression assembly 5, and the drive unit 3 is activated to cause the compression assembly 5 to radially compress the bushing 200 until the notch on the bushing 200 is closed. The swing arm 100 is then fixed on the second frame 2 by the robotic arm. At this time, the mounting port of the swing arm 100 is positioned at the upper pressure head 21 and is fixed by the robotic arm. After the bushing 200 is closed, it rises with the position of the lower pressure head 12. During this process, the compression assembly 5 and the lower pressure head 12 rise synchronously under the drive of the follower assembly 4 until the bushing 200 is installed into the mounting port of the swing arm 100. At this time, the drive unit 3 drives the compression assembly 5 to release the bushing 200 and descends synchronously with the lower pressure head 12. After the position is in place, it is ready for the installation of the next matching workpiece.

[0021] As attached Figure 1 As shown, in this embodiment, a pressing cylinder 11 is fixed inside the first frame 1. The end of the telescopic rod of the pressing cylinder 11 is fixedly connected to the lower pressing head 12. The pressing cylinder 11 drives the lower pressing head 12 to move along the arrangement direction of the upper and lower pressing heads 12. In some other embodiments, if a workpiece with a large mass is present, the pressing cylinder 11 can be replaced with a compression cylinder.

[0022] As attached Figure 1 and 2 As shown, the follower component 4 in this embodiment includes a first connector 41 fixed on the first frame 1 and a follower cylinder 43. A second connector 42 is slidably disposed on the first connector 41 via a slide rail mechanism. Normally, the slide rail mechanism uses a slider and a slide rail in cooperation. The slider is fixed on the second connector 42, and the slide rail is fixed on the first connector 41. The slider and the slide rail are in sliding cooperation. In this embodiment, two sets of sliders and two sets of slide rails are provided, and the two slide rails are arranged in parallel. The movement path of the second connector 42 is parallel to the movement path of the lower pressure head 12. The bottom of the second connector 42 is fixedly connected to the drive body 3. The follower cylinder 43 is fixed to the first connector 41. The telescopic rod of the follower cylinder 43 is connected to the second connector 42. The follower cylinder 43 drives the second connector 42 and the drive body 3 to move up and down.

[0023] As attached Figure 3 As shown, in this embodiment, the compression component 5 includes a first pressure block 51 and a second pressure block 52. The first pressure block 51 and the second pressure block 52 have shaping openings on their opposite surfaces. The two shaping openings are closed by force to form a cavity. The cavity is through-type and its cross-section is the same as that of the bushing 200. In production, different pressure blocks are replaced according to the shape of the part to be compressed, i.e., the bushing 200. The first pressure block 51 is connected to the first output end of the drive body 3, and the second pressure block 52 is connected to the second output end of the drive body 3. The drive body 3 drives the first output end and the second output end to move apart or close together synchronously, so as to separate or merge the first pressure block 51 and the second pressure block 52. It should be noted that the distance between the first pressure block 51 and the second pressure block 52 needs to be set correctly during installation. The two pressure blocks are arranged on both sides of the lower pressure head 12, and the first pressure block 51 and the second pressure block 52 are symmetrically arranged about the lower pressure head 12. In addition, the arrangement direction of the lower pressure head 12 and the upper pressure head 21 is perpendicular to the arrangement direction of the drive body 3.

[0024] In a further embodiment, the drive body 3 uses a motor 32 and a "bidirectional lead screw" for cooperation. The drive body 3 includes a motor 32, a forward and reverse threaded lead screw 31 and a mounting base 37. The mounting base 37 fixes the second connecting member 42. The motor 32 is fixed on the mounting base 37. One end of the forward and reverse threaded lead screw 31 is driven and mounted on the output shaft of the motor 32. A first nut 33 is threadedly connected to the forward thread section of the forward and reverse threaded lead screw 31, and a second nut 35 is threadedly connected to the reverse thread section of the forward and reverse threaded lead screw 31. Two first guide posts 34 and two second guide posts 36 are movably mounted on the mounting base 37. Four diamond-shaped through holes are opened on the side wall of the mounting base 37 near the compression assembly 5. Normally, the first guide posts 34 and second guide posts 36 are arranged alternately and are parallel to the positive and negative threaded rods 31. One end of the first guide post 34 near the motor 32 is fixedly welded to the first nut 33, and the other end is fixedly welded to the first pressure block 51. The two second guide posts 36 are fixed at one end near the motor 32. The first end is welded to the second nut 35, and the other end is fixedly welded to the second pressure block 52. In use, the drive motor 32 drives the positive and negative threaded rods 31 to rotate. Since the threads on the positive and negative threaded rods 31 are of two types and the rotation directions of the two types of threads are opposite, this results in the second nut 35 and the first nut 33 moving in opposite directions when the positive and negative threaded rods 31 rotate in one direction. This achieves the corresponding guide post driving the corresponding pressure block to move, and finally achieves the bidirectional pressing or releasing of the bushing 200 by the first pressure block 51 and the second pressure block 52.

[0025] In a further embodiment, two first guide posts 34 and two second guide posts 36 are evenly spaced on the mounting base 37.

[0026] As attached Figure 3 In embodiment 4, the first pressing block 51 is provided with a positioning groove 512, and a positioning member 511 is slidably provided in the positioning groove 512. The positioning member 511 movably positions the notch of the bushing 200 on the lower pressing head 12. With the setting of the positioning member 511, when the bushing 200 is installed on the lower pressing head 12, the orientation of the notch of the bushing 200 can be positioned to prevent the notch of the bushing 200 from facing the first pressing block 51 or the second pressing block 52, that is, to avoid facing the force side, thus preventing the failure of the narrowing operation and improving the work efficiency. In some embodiments, a spring is used to connect the first pressing block 51 and the positioning member 511. After the operator positions the first pressing block 51 with the positioning member 511, it automatically resets under the deformation of the spring, which is convenient for operation again.

[0027] In a further embodiment, the designers set up a temporary storage station on the first frame 1 to place the bushing 200. Example 2

[0028] This embodiment provides a pressing method based on the necking pressing device in Embodiment 1 above, which includes the following steps: The robot fixes the mounting port of the swing arm 100 to the upper pressure head 21 and secures it. The bushing 200 is placed on the lower pressure head 12 by manual or mechanical operation and positioned using the positioning component 511. Then, the motor 32 is started to drive the forward and reverse threaded rods 31 to rotate, driving the first pressure block 51 and the second pressure block 52 to perform a narrowing operation on the bushing 200. Then, the pressing cylinder 11 and the follower cylinder 43 are started to synchronously drive the compression component 5 and the bushing 200 to move upward to the pressure head 21. The lower pressure head 12 forces the bushing 200 into the mounting port of the swing arm 100 until the bushing 200 is released and fixed in the mounting port of the swing arm 100. The pressing cylinder 11 and the follower cylinder 43 are then reset to start the next round of narrowing pressing operation. This equipment has high operating efficiency and does not damage the mounting surface of the parts, thus extending the service life of the product.

[0029] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and 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, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

Claims

1. A necking and pressing device, characterized in that, include: First frame (1), on which a pressure head (12) is movably mounted; The second frame (2) is fixed on the first frame (1). The second frame (2) is fixed with an upper pressure head (21) that is spatially coaxial with the lower pressure head (12). The lower pressure head (12) is subjected to force to move closer to / away from the upper pressure head (21). A drive body (3) is movably mounted on the second frame (2) via a follower component (4). A compression component (5) is provided at the output end of the drive body (3). The drive body (3) drives the compression component (5) to tighten in both directions. The spatial positions of the drive body (3) and the lower pressure head (12) are switched synchronously. The compression component (5) includes a first pressure block (51) and a second pressure block (52). A shaping opening is provided on the opposite surface of the first pressure block (51) and the second pressure block (52). The two shaping openings are closed by force to form a cavity. The first pressure block (51) is connected to the first output end of the driving body (3), and the second pressure block (52) is connected to the second output end of the driving body (3). The driving body (3) drives the first output end and the second output end to move apart or close together, so that the first pressure block (51) and the second pressure block (52) separate or merge. The drive unit (3) includes a motor (32), a forward and reverse threaded screw (31), and a mounting base (37). The mounting base (37) fixes the follower assembly (4). The motor (32) is fixed to the mounting base (37). One end of the forward and reverse threaded screw (31) is driven and mounted on the output shaft of the motor (32). A first nut (33) is threadedly connected to the forward thread section of the forward and reverse threaded screw (31), and a second nut (35) is threadedly connected to the reverse thread section of the forward and reverse threaded screw (31). The mounting base (37) is... 7) At least two first guide posts (34) and two second guide posts (36) are movably installed on the upper part. The first guide posts (34) and the second guide posts (36) are parallel to the positive and negative threaded rods (31). The first nut (33) is fixedly connected to one end of the two first guide posts (34) near the motor (32), and the first pressure block (51) is fixedly connected to the other end. The second nut (35) is fixedly connected to one end of the two second guide posts (36) near the motor (32), and the second pressure block (52) is fixedly connected to the other end. The follower component (4) includes a first connector (41) fixed on the first frame (1), a second connector (42) slidably disposed on the first connector (41) via a slide rail mechanism, the second connector (42) fixedly connected to the drive body (3), a follower cylinder (43) fixed on the first connector (41), and the telescopic rod of the follower cylinder (43) connected to the second connector (42).

2. The necking and pressing device according to claim 1, characterized in that, A press cylinder (11) is fixed on the first frame (1), and the telescopic rod of the press cylinder (11) is fixedly connected to the lower press head (12).

3. The necking and pressing device according to claim 1, characterized in that, Multiple first guide posts (34) and second guide posts (36) are evenly spaced on the mounting base (37).

4. The necking and pressing device according to claim 1, characterized in that, The compression assembly (5) is provided with a positioning groove (512), and a positioning element (511) is slidably provided in the positioning groove (512). The positioning element (511) is used to position the notch of the bushing (200) on the lower pressure head (12).

5. The necking and pressing device according to claim 1, characterized in that, The arrangement direction of the lower pressure head (12) and the upper pressure head (21) is perpendicular to the arrangement direction of the drive body (3).

6. The necking and pressing device according to any one of claims 1 to 5, characterized in that, The first frame (1) is equipped with a temporary storage station.

7. A pressing method based on the necking pressing device according to any one of claims 1 to 6, characterized in that, include: Place the bushing (200) on the lower pressure head (12) and fix the mounting port of the swing arm (100) to the upper pressure head (21). Start the drive body (3) to drive the compression assembly (5) to perform bidirectional tightening operation until the notch on the bushing is closed; The synchronous start-up of the accompanying component (4) drives the drive body (3) to move towards the upper pressure head (21). At the same time, the lower pressure head (12) moves towards the upper pressure head (21) under the action of external force. The lower pressure head (12) presses the bushing (200) into the mounting port of the swing arm (100) until the bushing (200) is disengaged from the compression component (5) and deformed and fixed in the mounting port.

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