Workpiece positioning jig
By combining vacuum adsorption and openable clamping blocks for positioning, the problems of workpiece positioning accuracy and material unloading between processes are solved, achieving high-precision positioning and stable robotic arm material handling, ensuring workpiece safety and processing efficiency.
Patent Information
- Application Number
- CN202423244238.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-27
AI Technical Summary
In the existing technology, it is difficult to guarantee the positioning accuracy of the workpiece between processes, and interference or low positioning accuracy is easy to occur when the robot unloads the material, resulting in workpiece damage and errors.
The workpiece is positioned by a combination of vacuum adsorption and an openable clamping block. The clamping block maintains a preset distance from the outer wall of the workpiece. The workpiece is fixed through an air extraction hole, and the position of the workpiece is detected by a sensor to ensure positioning accuracy and smooth feeding.
It achieves high-precision positioning of the workpiece, reduces the difficulty of material placement, avoids workpiece damage and interference when the robot arm picks up the material, and improves the stability and efficiency of the processing flow.
Smart Images
Figure CN223630233U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to tool fixture technical field, especially a workpiece positioning fixture. BACKGROUND
[0002] In the process of automatic processing, the workpiece needs to adopt transfer positioning device when flowing between different processes, and needs to be accurately positioned when staying between two processes, so as to facilitate the accurate pickup of the workpiece by the manipulator. At present, the positioning is realized by cooperating multiple positioning pins with the workpiece, however, the gap of cooperation is small, and it is difficult to directly place accurately when the manipulator automatically places the material, which is easy to interfere and even cause damage to the workpiece, and using a larger cooperation gap will lead to low positioning accuracy and large error when feeding in the next process. SUMMARY
[0003] The utility model aims at solving one of the technical problems in the prior art. Therefore, the utility model provides a workpiece positioning fixture, which can improve positioning accuracy and reduce feeding difficulty.
[0004] The workpiece positioning fixture according to the utility model embodiment comprises:
[0005] A bottom plate is provided with a first positioning block and a second positioning block, the bottom plate is provided with an air extraction hole, the air extraction hole is connected with a vacuum generator, and the air extraction hole is used for adsorbing the workpiece and fixing the workpiece on the bottom plate;
[0006] A clamping device comprises a first clamping block opposite to the first positioning block and a second clamping block opposite to the second positioning block, the first clamping block and the second clamping block are used for making the adjacent two side walls of the workpiece abut against the first positioning block and the second positioning block respectively, and the first clamping block and the second clamping block are kept at a predetermined distance from the outer peripheral wall of the workpiece during positioning.
[0007] The workpiece positioning fixture according to the utility model embodiment has at least the following beneficial effects:
[0008] In the embodiment, the air extraction hole is arranged on the bottom plate to realize vacuum adsorption and fixation of the workpiece, and the first clamping block and the second clamping block are used for positioning the workpiece, and the first clamping block and the second clamping block are kept at a predetermined distance from the outer peripheral wall of the workpiece during positioning. The first clamping block and the second clamping block can be opened and closed to increase the gap during feeding, reduce the feeding difficulty while maintaining the positioning accuracy, avoid interference, and avoid damage to the workpiece.
[0009] According to some embodiments of the utility model, the bottom plate is provided with a first stop surface and a second stop surface, the first clamping block presses the first stop surface during positioning, the second clamping block presses the second stop surface, and the first clamping block and the second clamping block are kept at a predetermined distance from the outer peripheral wall of the workpiece.
[0010] According to some embodiments of the present application, the bottom plate is provided with a first stop surface, and when the first clamping block presses the first stop surface, the distance between the first clamping block and the outer peripheral wall of the workpiece is not greater than 0.01 mm.
[0011] According to some embodiments of the present application, the bottom plate is provided with a second stop surface, and when the second clamping block presses the second stop surface, the distance between the second clamping block and the outer peripheral wall of the workpiece is not greater than 0.01 mm.
[0012] According to some embodiments of the present application, when the clamping device is loosened, the first clamping block is located at an initial position away from the workpiece, and the distance between the first clamping block and the outer peripheral wall of the workpiece is not greater than 2 mm.
[0013] According to some embodiments of the present application, when the clamping device is loosened, the second clamping block is located at an initial position away from the workpiece, and the distance between the second clamping block and the outer peripheral wall of the workpiece is not greater than 2 mm.
[0014] According to some embodiments of the present application, at least two air extraction holes are arranged along the width direction of the bottom plate.
[0015] According to some embodiments of the present application, at least three air extraction holes are arranged along the length direction of the bottom plate.
[0016] According to some embodiments of the present application, a plurality of air channels extending along the width direction of the bottom plate are arranged in the bottom plate, the air extraction holes are communicated with the air channels, and the plurality of air channels are arranged at intervals along the length direction of the bottom plate.
[0017] According to some embodiments of the present application, a sensor is arranged on the bottom plate, and the sensor is used to detect whether the workpiece is placed on the bottom plate.
[0018] Additional aspects and advantages of the present application will be given in part in the following description, and will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0019] The present application will be further described below in conjunction with the drawings and embodiments, wherein:
[0020] Figure 1 It is a perspective view of a workpiece positioning jig according to an embodiment of the present application;
[0021] Figure 2 It is a sectional view of a workpiece positioning jig according to an embodiment of the present application;
[0022] Figure 3 It is a bottom view of a workpiece positioning jig according to an embodiment of the present application;
[0023] Figure 4 A stereogram of a workpiece positioning jig installing a workpiece in an embodiment of the present application.
[0024] Reference signs:
[0025] Base plate 100; first stop surface 101; second stop surface 102; air extraction hole 103; air duct 104; first positioning block 105; second positioning block 106; sensor 107; positioning cylinder 108; workpiece 109;
[0026] Clamping device 110; first clamping block 111; second clamping block 112; communication pipe 113. DETAILED DESCRIPTION
[0027] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.
[0028] In the description of the present application, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation of the present application.
[0029] In the description of the present application, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If the first, second is described only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.
[0030] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application according to the specific content of the technical solution.
[0031] Reference Figure 1In the utility model embodiment, the workpiece positioning jig comprises a bottom plate 100 and a clamping device 110, the bottom plate 100 is provided with a first positioning block 105 and a second positioning block 106, the bottom plate 100 is provided with an air extraction hole 103, the air extraction hole 103 is connected with a vacuum generator, the air extraction hole 103 is used for adsorbing the workpiece 109 and fixing the workpiece 109 on the bottom plate 100, and the workpiece 109 is fixed by vacuum adsorption. The clamping device 110 comprises a first clamping block 111 arranged opposite to the first positioning block 105 and a second clamping block 112 arranged opposite to the second positioning block 106, the first clamping block 111 and the second clamping block 112 are used for enabling the two adjacent side walls of the workpiece 109 to abut against the first positioning block 105 and the second positioning block 106 respectively, when positioning, the first clamping block 111 and the second clamping block 112 are kept at a predetermined distance from the outer peripheral wall of the workpiece 109, the first clamping block 111 and the second clamping block 112 capable of being opened and closed can increase the gap during discharging, the positioning accuracy can be kept while the discharging difficulty is reduced, interference is avoided, and the workpiece 109 is prevented from being damaged.
[0032] Specifically, referring to Figure 4 , the first clamping block 111 is located on one side of the bottom plate 100, when the first clamping block 111 moves towards the workpiece 109, the workpiece 109 can be moved along the length direction of the bottom plate 100, and the other side outer wall of the workpiece 109 opposite to the first clamping block 111 abuts against the first positioning block 105, so that the positioning of the workpiece 109 along the length direction of the bottom plate 100 is realized. Meanwhile, the second clamping block 112 is located on one side of the bottom plate 100, when the second clamping block 112 moves towards the workpiece 109, the workpiece 109 can be moved along the width direction of the bottom plate 100, and the other side outer wall of the workpiece 109 opposite to the second clamping block 112 abuts against the second positioning block 106, so that the positioning of the workpiece 109 along the width direction of the bottom plate 100 is realized. Referring to Figure 3 It can be understood that the bottom of the bottom plate 100 is provided with two positioning cylinders 108, and the two positioning cylinders 108 drive the first clamping block 111 and the second clamping block 112 to move respectively. Moreover, the first clamping block 111 and the second clamping block 112 move simultaneously during positioning, which is beneficial to improving the action efficiency.
[0033] It can be understood that the bottom plate 100 is provided with a first stop surface 101 and a second stop surface 102, and during positioning, the first clamping block 111 presses the first stop surface 101, and the second clamping block 112 presses the second stop surface 102, so that the first clamping block 111 and the second clamping block 112 are both kept a predetermined distance from the outer peripheral wall of the workpiece 109, avoiding complete clamping of the workpiece 109. It can be understood that in the actual working process, on the one hand, the bottom plate 100 is used as a transfer table to place the workpiece 109 between two processes, so it is not necessary to process the workpiece 109 on the bottom plate 100, and therefore it is not necessary to clamp the workpiece 109. On the other hand, after the workpiece 109 is placed on the bottom plate 100 and positioned, a mechanical hand is needed to take the workpiece 109, and when the first clamping block 111 and the second clamping block 112 are kept a predetermined distance from the workpiece 109, the workpiece 109 can be limited within a predetermined range, which is conducive to the accurate taking of the workpiece 109 by the mechanical hand. If the first clamping block 111 and the second clamping block 112 tightly press the outer peripheral wall of the workpiece 109 during positioning, it will cause the mechanical hand to be unable to take the workpiece 109, and when the first clamping block 111 and the second clamping block 112 are loosened and the workpiece 109 is taken by the mechanical hand again, the gap between the first clamping block 111 and the second clamping block 112 and the workpiece 109 will be too large, and the workpiece 109 will move in a large range, which will cause the mechanical hand to be unable to accurately pick up the workpiece 109. Therefore, in the embodiment of the present application, the workpiece 109 is positioned by the first clamping block 111 and the second clamping block 112 without clamping the workpiece 109, and at the same time, the workpiece 109 is fixed by the vacuum adsorption mode realized through the air extraction hole 103. The vacuum adsorption function is closed during taking to facilitate the mechanical hand to pick up, which can facilitate the accurate taking of the workpiece 109 by the mechanical hand while accurately positioning the workpiece 109, and is conducive to ensuring the stability and efficiency of the processing flow.
[0034] It can be understood that when the clamping device 110 is loosened, the first clamping block 111 is located at an initial position away from the workpiece 109, and the distance between the first clamping block 111 and the outer peripheral wall of the workpiece 109 is not greater than 2 mm. At the same time, when the clamping device 110 is loosened, the second clamping block 112 is located at an initial position away from the workpiece 109, and the distance between the second clamping block 112 and the outer peripheral wall of the workpiece 109 is not greater than 2 mm. It can be understood that when the workpiece 109 is placed on the bottom plate 100, the first clamping block 111 and the second clamping block 112 are both located at the initial position away from the workpiece 109, and a larger gap is needed during the process of placing the workpiece 109 on the bottom plate 100 by the mechanical hand, which can ensure that the workpiece 109 is smoothly placed on the bottom plate 100 without interference.
[0035] It can be understood that the bottom plate 100 is provided with a first stop surface 101, when the first clamping block 111 presses the first stop surface 101, the distance between the first clamping block 111 and the outer peripheral wall of the workpiece 109 is not greater than 0.01 mm. It can be understood that during positioning, the movement range of the workpiece 109 along the length direction of the bottom plate 100 is not greater than 0.01 mm, and the workpiece 109 can be accurately positioned. At the same time, the other side of the bottom plate 100 adjacent to the first stop surface 101 is provided with a second stop surface 102, when the second clamping block 112 presses the second stop surface 102, the distance between the second clamping block 112 and the outer peripheral wall of the workpiece 109 is not greater than 0.01 mm. It can be understood that during positioning, the movement range of the workpiece 109 along the width direction of the bottom plate 100 is not greater than 0.01 mm, and the workpiece 109 can be accurately positioned along the length and width directions of the bottom plate 100, thereby facilitating the accurate picking of the workpiece 109 by the mechanical hand.
[0036] Referring to Figure 1 , along the width direction of the bottom plate 100, at least two suction holes 103 are arranged. At the same time, along the length direction of the bottom plate 100, at least three suction holes 103 are arranged, which can ensure that the workpiece 109 can be stably placed on the bottom plate 100 without moving, and facilitate to ensure that the mechanical hand can accurately take the material.
[0037] Further, referring to Figure 2 , the bottom plate 100 is provided with a plurality of air channels 104 extending along the width direction thereof, the suction holes 103 are communicated with the air channels 104, and the plurality of air channels 104 are arranged at intervals along the length direction of the bottom plate 100. It can be understood that the same air channel 104 is communicated with at least two suction holes 103, thereby ensuring the stable fitting of the workpiece 109 and the bottom plate 100. It can be understood that a communication pipe 113 is arranged between the adjacent two air channels 104, the communication pipe 113 extends along the length direction of the bottom plate 100, the communication pipe 113 can simultaneously communicate a plurality of air channels 104, and it is beneficial to keep the air pressure of the plurality of suction holes 103 the same.
[0038] Further, the bottom plate 100 is provided with a sensor 107, which is used to detect whether the workpiece 109 is placed on the bottom plate 100. It can be understood that when the workpiece 109 is placed on the bottom plate 100 and the sensor 107 can detect the workpiece 109, the positioning cylinder 108 can drive the first clamping block 111 and the second clamping block 112 to clamp the workpiece 109; after the first clamping block 111 and the second clamping block 112 are in place, the vacuum generating device is started, thereby adsorbing the workpiece 109 through the suction hole 103, so that the workpiece 109 is fixed on the bottom plate 100, and the movement of the workpiece 109 is prevented.
[0039] The utility model embodiment makes the detailed explanation in combination with the drawing, but the utility model is not limited to the above -mentioned embodiment, still can make various changes in the knowledge range that the person skilled in the art has possesses without departing from the utility model's tenet under the precondition that the knowledge range that the person skilled in the art has possesses.
Claims
1. A workpiece positioning fixture, comprising: The utility model relates to a vacuum adsorption device for positioning and clamping workpiece, comprising: a base plate, which is provided with a first positioning block and a second positioning block, and is provided with an air suction hole connected to a vacuum generator, the air suction hole being used to adsorb and fix the workpiece on the base plate; a clamping device, which comprises a first clamping block arranged opposite to the first positioning block and a second clamping block arranged opposite to the second positioning block, the first clamping block and the second clamping block being used to make the adjacent two side walls of the workpiece respectively abut against the first positioning block and the second positioning block, and the first clamping block and the second clamping block being kept at a predetermined distance from the outer peripheral wall of the workpiece during positioning.
2. The workpiece positioning fixture of claim 1, wherein The base plate is provided with a first stop surface and a second stop surface, and the first clamping block and the second clamping block are pressed against the first stop surface and the second stop surface respectively during positioning, so that the first clamping block and the second clamping block are kept at a predetermined distance from the outer peripheral wall of the workpiece.
3. The workpiece positioning fixture of claim 1, wherein, The base plate is provided with a first stop surface, and the distance between the first clamping block and the outer peripheral wall of the workpiece is not greater than 0.01 mm when the first clamping block is pressed against the first stop surface.
4. The workpiece positioning fixture of claim 1, wherein The base plate is provided with a second stop surface, and the distance between the second clamping block and the outer peripheral wall of the workpiece is not greater than 0.01 mm when the second clamping block is pressed against the second stop surface.
5. The workpiece positioning fixture of claim 1, wherein The first clamping block is located at an initial position away from the workpiece when the clamping device is released, and the distance between the first clamping block and the outer peripheral wall of the workpiece is not greater than 2 mm.
6. The workpiece positioning fixture of claim 1, wherein The second clamping block is located at an initial position away from the workpiece when the clamping device is released, and the distance between the second clamping block and the outer peripheral wall of the workpiece is not greater than 2 mm.
7. The workpiece positioning fixture of claim 1, wherein At least two air suction holes are arranged along the width direction of the base plate.
8. The workpiece positioning fixture of claim 1, wherein, At least three air suction holes are arranged along the length direction of the base plate.
9. The workpiece positioning fixture of claim 1, wherein, A plurality of air channels extending along the width direction of the base plate are arranged in the base plate, the air suction holes are communicated with the air channels, and the plurality of air channels are arranged at intervals along the length direction of the base plate.
10. The workpiece positioning fixture of claim 1, wherein A sensor is arranged on the base plate, and the sensor is used to detect whether the workpiece is placed on the base plate.