An assembly line workpiece positioning device

Abstract

The application discloses an assembly line workpiece positioning device, and relates to the technical field of workpiece assembly.The device comprises a rack, a mounting beam arranged on the rack, a clamping part for clamping a workpiece, two clamping plates slidingly arranged on the mounting beam, and an abutting part fixedly arranged on the clamping plates and used for abutting against the workpiece; a compensation air bag is connected to the mutually-approaching side walls of the clamping plates, the compensation air bag is used for closely abutting against the surface of the workpiece, and the mutually-approaching side walls of the clamping plates are provided with a plurality of groups of compensation air bags along the length direction of the clamping plates; and an air source is connected to the compensation air bag and used for blowing air or sucking air into the compensation air bag.When the workpiece is clamped, the air source blows air into the compensation air bag, the compensation air bag is inflated to closely abut against the surface of the workpiece, and the contact area with the workpiece is increased, so that the workpiece is effectively prevented from being damaged due to excessive clamping pressure for special-shaped and fragile workpieces.

Description

Technical Field

[0001] This application relates to the field of workpiece assembly technology, and in particular to a workpiece positioning device for an assembly line. Background Technology

[0002] With the rapid development of automated production, the requirements for workpiece positioning accuracy and efficiency on assembly lines are becoming increasingly stringent. Currently, most existing workpiece positioning devices rely on manual labor or simple mechanical equipment for positioning, which not only suffers from low efficiency and poor positioning accuracy but also easily affects assembly quality.

[0003] Therefore, there is an urgent need for a workpiece positioning device that can improve positioning accuracy and enhance production efficiency and quality. Irregularly shaped workpieces often refer to workpieces with irregular shapes. These workpieces require clamping during welding, polishing, hardness testing, and dimensional measurement. Currently, existing clamping methods generally use two sets of clamping plates to hold and fix the workpiece. However, these methods are only suitable for clamping and fixing workpieces with regular shapes and are not convenient for clamping irregularly shaped workpieces. This leads to unstable clamping of irregularly shaped workpieces, significantly affecting the processing effect and reducing ease of use.

[0004] Especially for irregularly shaped and fragile workpieces, the small contact area between the clamping parts and the workpiece during clamping results in high clamping pressure, which can easily damage or even destroy the workpiece. Summary of the Invention

[0005] To reduce damage to workpieces, this application provides a workpiece positioning device for assembly lines.

[0006] An assembly line workpiece positioning device, comprising: frame, Mounting beams are installed on the frame. A clamping part is used to clamp a workpiece. The clamping part includes two clamping plates that are slidably disposed on the mounting beam. An abutment part for abutting against the workpiece is fixedly disposed on the clamping plates. Compensating airbags are connected to the sidewalls of the clamping plates that are close to each other. The compensating airbags are used to fit against the surface of the workpiece. Multiple sets of compensating airbags are arranged on the sidewalls of the clamping plates that are close to each other along the length of the clamping plates. An air source, connected to the compensating airbag, is used to blow or inhale air into the compensating airbag.

[0007] Optionally, the outer surface of the compensation airbag is provided with an anti-slip layer.

[0008] Optionally, a support member is provided inside the compensation airbag, and a driving member is provided on the clamping plate for driving the support member column to move closer to or further away from the front end of the compensation airbag.

[0009] Optionally, the support includes a first support column, a buffer, and a second support column. The first support column is slidably inserted into the clamping plate, and the second support column is slidably sleeved on the first support column. The buffer is used to drive the second support column to press the compensation airbag against the workpiece surface.

[0010] Optionally, a flexible abutment is provided at the end of the second support column away from the first support column.

[0011] Optionally, each set of compensating airbags is connected to an air tube, and each air tube is equipped with a valve for adjusting the air tube opening. Each air tube is connected to the air source.

[0012] Optionally, it also includes a displacement sensor and a controller. The displacement sensor is disposed at the end of the first support column away from the clamping plate. The displacement sensor is electrically connected to the controller, which is used to control the sliding distance of the first support column driven by the driving component.

[0013] Optionally, the abutting portion includes an abutting block, and a flexible pad is provided at one end of the abutting block away from the clamping plate.

[0014] In summary, this application includes at least one of the following beneficial technical effects: When clamping a workpiece, the air source blows air into the compensating airbag, causing the airbag to expand and fit tightly against the workpiece surface, increasing the contact area. The compensating airbag, in conjunction with the clamping part, effectively clamps the workpiece, preventing damage from excessive clamping pressure, especially for irregularly shaped or fragile workpieces. During clamping, the second support column extends into the compensating airbag, increasing its overall vertical strength and preventing excessive downward bending under gravity, thus increasing the vertical support force of the compensating airbag on the workpiece. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a cross-sectional view of the main installation beam in the embodiments of this application; Figure 3 This is a cross-sectional view of the pusher clamping plate in an embodiment of this application.

[0016] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Mounting beam; 21. Slide groove; 211. Slider; 22. Lead screw; 23. Drive motor; 3. Clamping plate; 31. Fixing rod; 32. Abutment block; 33. Air source; 331. Air pipe; 3311. Valve; 34. Slide groove; 4. Compensating airbag; 41. Anti-slip layer; 5. Bracket; 51. Drive cylinder; 61. First support column; 62. Buffer; 63. Second support column; 631. Flexible abutment joint. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0019] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0021] This application discloses a workpiece positioning device for an assembly line.

[0022] Reference Figure 1 An assembly line workpiece positioning device includes a frame 1, a mounting beam 2, and a clamping part. The mounting beam 2 is horizontally fixed on the frame 1, and the clamping part is used to clamp the workpiece. The clamping part includes two clamping plates 3 that are slidably disposed on the mounting beam 2 and are vertically disposed.

[0023] Optionally, refer to Figure 1 and Figure 2 The side wall of the mounting beam 2 has a groove 21 along its length, and a slider 211 is slidably disposed within the groove 21. The groove 21 can be a dovetail groove or a T-groove, and the slider 211 is adapted to the groove 21. The clamping plate 3 is fixedly disposed on the slider 211. Specifically, the clamping plate 3 is fixedly connected to the slider 211 by a fixing rod 31 to increase the distance between the clamping plate 3 and the mounting beam 2, providing a larger clamping space for the workpiece.

[0024] Reference Figure 2 A lead screw 22 is provided along the length of the mounting beam 2. The lead screw 22 is located in the slide groove 21, and its two ends are rotatably connected to the two ends of the mounting beam 2. The sliders 211 are threadedly connected to the lead screw 22. In this embodiment, the lead screw 22 is a bidirectional lead screw 22, with the threads at both ends of the bidirectional lead screw 22 rotating in opposite directions. The rotation of the lead screw 22 can synchronously drive the two sliders 211 to move closer or further apart. A drive motor 23 is fixedly provided at one end of the mounting beam 2, and the output shaft of the drive motor 23 is fixedly connected to the lead screw 22. The drive motor 23 drives the lead screw 22 to rotate, and the lead screw 22 drives the two sliders 211 to move along the slide groove 21 in a direction that moves closer or further apart from each other, thereby adjusting the distance between the two sliders 211.

[0025] Reference Figure 3 The clamping plate 3 is fixedly provided with an abutting part for contacting the workpiece. The abutting part includes an abutting block 32. Two abutting blocks 32 are provided, located at the upper and lower ends of the clamping plate 3. A flexible pad is provided at the end of the abutting block 32 away from the clamping plate 3. The flexible pad can be a rubber pad to reduce wear on the surface of the workpiece.

[0026] Reference Figure 3 The clamping plate 3 is also equipped with a compensating airbag 4 and an air source 33. The compensating airbag 4 is made of rubber and has a high elastic deformation capacity. The compensating airbag 4 is connected to the adjacent side walls of the clamping plate 3 and is used to fit against the surface of the workpiece. The outer surface of the compensating airbag 4 is provided with an anti-slip layer 41 to increase the friction with the workpiece.

[0027] Optionally, multiple sets of compensating airbags 4 are provided on the sidewalls of the clamping plates 3 that are close to each other along the length of the clamping plates 3, and each set of compensating airbags 4 may have one or more airbags arranged in the horizontal direction. In this embodiment, three sets of compensating airbags are distributed at intervals along the length of the clamping plates 3.

[0028] The air source 33 is connected to the compensating airbag 4 through the air tube 331 and is used to blow or inhale air into the compensating airbag 4. The air source 33 can be an air pump, and each compensating airbag 4 is connected to the air pump through the air tube 331.

[0029] Optionally, a support member is provided inside the compensation airbag 4, and a driving member is provided on the clamping plate 3 for driving the support member to move closer to or away from the front end of the compensation airbag 4. The driving member is a bracket 5 fixedly provided at the end of the clamping plate 3 away from the compensation airbag 4, and a driving cylinder 51 fixedly provided on the bracket 5.

[0030] Reference Figure 3 The support components include a first support column 61, a buffer 62, and a second support column 63. The first support column 61 is slidably inserted into the clamping plate 3, and the second support column 63 is slidably sleeved on the first support column 61. A sliding groove 34 is formed in the clamping plate 3 along its width direction. The first support column 61 and the second support column 63 are slidably disposed in the sliding groove 34, and the second support column 63 is adapted to the sliding groove 34. The piston rod of the drive cylinder 51 is fixedly connected to the first support column 61. The compensating airbag 4 is sleeved on the second support column 63. One end of the compensating airbag 4 is fixedly connected to the adjacent side walls of the clamping plate 3, and the compensating airbag 4 is sealed to the side walls of the clamping plate 3 to prevent air leakage at the connection.

[0031] When clamping the workpiece, air source 33 inflates the compensating airbag 4, causing it to expand and fit tightly against the workpiece surface, increasing the contact area. The compensating airbag 4, in conjunction with the clamping part, effectively clamps the workpiece, preventing damage from excessive clamping pressure, especially for irregularly shaped or fragile workpieces. During clamping, the second support column 63 extends into the compensating airbag 4, increasing its overall vertical strength and preventing excessive downward bending under gravity, thus increasing the vertical support force of the compensating airbag 4 on the workpiece.

[0032] To minimize damage to the compensating airbag 4, a flexible abutment is provided at the end of the second support column 63 furthest from the first support column 61. The upper and lower ends of the flexible abutment are arc-shaped, which reduces damage to the end of the second support column 63 to the compensating airbag 4 when it bends downward.

[0033] The buffer 62 is used to drive the second support column 63 to press the compensation airbag 4 against the workpiece surface. The driving component is connected to the first support column 61. The buffer 62 is a buffer spring, which is disposed inside the second support column 63. One end of the buffer spring is fixedly connected to the first support column 61, and the other end is fixedly connected to the second support column 63.

[0034] Optionally, each set of compensating airbags 4 is connected to an air pipe 331, and each air pipe 331 is equipped with a valve 3311 for adjusting the opening of the air pipe 331. The valve 3311 can be a solenoid valve, and each air pipe 331 is connected to an air source 33. The air pressure of each airbag can be controlled by the valve 3311 to adapt to the clamping of irregularly shaped workpieces.

[0035] Optionally, the positioning device further includes a displacement sensor and a controller. The displacement sensor is located at the end of the first support column 61 away from the clamping plate 3. The displacement sensor is electrically connected to the controller, which controls the sliding distance of the first support column 61 driven by the driving component. The displacement sensor detects the distance between the first support column 61 and the second support column 63. When the displacement detection signal output by the displacement sensor is less than a threshold, the controller controls the piston rod of the corresponding driving cylinder 51 to extend or retract inward, that is, to drive the first support column 61 to move away from the compensating airbag 4, so as to appropriately increase the distance between the first support column 61 and the second support column 63, prevent the return spring in the second support column 63 from being compressed too much, so that the pressure of the compensating airbag 4 acting on the workpiece is within a suitable pressure range, reducing damage to the workpiece.

[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A workpiece positioning device for an assembly line, characterized in that, include: Rack (1), Mounting beam (2) is installed on the frame (1). The clamping part is used to clamp the workpiece. The clamping part includes two clamping plates (3) that are slidably disposed on the mounting beam (2). The clamping plates (3) are fixedly provided with abutting parts for abutting against the workpiece. Compensating airbags (4) are connected to the side walls of the clamping plates (3) that are close to each other. The compensating airbags (4) are used to fit against the surface of the workpiece. Multiple sets of compensating airbags (4) are arranged along the length direction of the clamping plates (3) on the side walls of the clamping plates (3) that are close to each other. An air source (33) is connected to the compensation airbag (4) and is used to blow or inhale air into the compensation airbag (4).

2. The workpiece positioning device for an assembly line according to claim 1, characterized in that, The outer surface of the compensation airbag (4) is provided with an anti-slip layer (41).

3. The workpiece positioning device for an assembly line according to claim 1, characterized in that, The compensation airbag (4) is provided with a support member, and the clamping plate (3) is provided with a driving member for driving the support member to move closer to or further away from the front end of the compensation airbag (4).

4. The workpiece positioning device for an assembly line according to claim 3, characterized in that, The support includes a first support column (61), a buffer (62), and a second support column (63). The first support column (61) is slidably inserted into the clamping plate (3), and the second support column (63) is slidably sleeved on the first support column (61). The buffer (62) is used to drive the second support column (63) to press the compensation airbag (4) against the workpiece surface. The driving member is connected to the first support column (61).

5. The workpiece positioning device for an assembly line according to claim 4, characterized in that, The second support column (63) has a flexible abutment at the end away from the first support column (61).

6. The workpiece positioning device for an assembly line according to claim 1, characterized in that, Each set of compensation airbags (4) is connected to an air tube (331), and each air tube (331) is provided with a valve (3311) for adjusting the opening of the air tube (331). Each air tube (331) is connected to the air source (33).

7. The workpiece positioning device for an assembly line according to claim 4, characterized in that, It also includes a displacement sensor and a controller. The displacement sensor is disposed at one end of the first support column (61) away from the clamping plate (3). The displacement sensor is electrically connected to the controller, which is used to control the sliding distance of the first support column (61) driven by the drive component.

8. The workpiece positioning device for an assembly line according to claim 1, characterized in that, The abutting part includes an abutting block (32), and a flexible pad is provided at one end of the abutting block (32) away from the clamping plate (3).

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