Workpiece positioning device

Abstract

This utility model belongs to the field of workpiece processing technology and discloses a workpiece positioning device. In the workpiece positioning device, the positioning plate has multiple positioning pin mounting holes. The positioning pin assembly includes a mounting sleeve and a positioning rod. The mounting sleeve of the positioning pin assembly is detachably installed in any positioning pin mounting hole. According to the position of the positioning hole of different models of workpieces, the mounting sleeve can be installed in a suitable positioning pin mounting hole, so that the workpiece positioning device can be adapted to various models of workpieces. In addition, when installing the workpiece, the positioning rod can be moved to the retracted position. At this time, the positioning rod retracts into the mounting sleeve and does not obstruct the installation of the workpiece. After the workpiece is installed in place, the positioning rod can be moved to the extended position. At this time, the positioning rod extends out of the mounting sleeve and can be inserted and matched with the positioning hole of the workpiece to achieve positioning.

Description

Technical Field

[0001] This utility model relates to the field of workpiece processing technology, and in particular to a workpiece positioning device. Background Technology

[0002] Before CNC machining, the workpiece needs to be mounted on a corresponding positioning fixture. In related technologies, the workpiece has positioning holes, and the positioning fixture has positioning pins. During installation, the workpiece is mounted on the positioning fixture, with the positioning pins and positioning holes making a transition fit to achieve positioning. Subsequently, the workpiece is locked to the positioning fixture using clamping blocks, locking screws, or other locking structures to complete the installation. However, in the above solutions, the positioning pins are generally fixed on the positioning fixture, which presents two problems: firstly, because the position of the positioning pins cannot be adjusted, one type of positioning fixture can only be used for workpieces of the same model; secondly, during workpiece installation, the positioning pins may obstruct the movement of the workpiece. Utility Model Content

[0003] According to one aspect of the present invention, a workpiece positioning device is provided to solve the problem that in the related art, a positioning fixture can only be adapted to workpieces of the same model, and that the positioning pin may cause some obstruction to the movement of the workpiece when it is installed.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A workpiece positioning device for mounting a workpiece, wherein the workpiece has a positioning hole; the device includes a positioning mechanism, the positioning mechanism comprising:

[0006] The positioning plate has multiple positioning pin mounting holes;

[0007] A locating pin assembly includes a mounting sleeve and a locating rod. The mounting sleeve is detachably disposed within any of the locating pin mounting holes. The locating rod is slidable relative to the mounting sleeve and has an extended position and a retracted position. When the locating rod is in the extended position, it extends out of the mounting sleeve, and the locating hole of the workpiece can be inserted into the locating rod. When the locating rod is in the retracted position, it retracts into the mounting sleeve.

[0008] As a preferred embodiment of the workpiece positioning device, an elastic element is provided between the bottom wall of the mounting sleeve and the positioning rod, the elastic element being used to provide an elastic force that causes the positioning rod to move toward the extended position.

[0009] As a preferred embodiment of the workpiece positioning device, multiple positioning pin assemblies are provided, and multiple mounting sleeves of the multiple positioning pin assemblies are respectively arranged in multiple positioning pin mounting holes.

[0010] As a preferred embodiment of the workpiece positioning device, the top of the mounting sleeve is provided with a top plate, the top plate has a through hole communicating with the inner cavity of the mounting sleeve, the positioning rod passes through the through hole, the inner cavity of the mounting sleeve is provided with a piston, the positioning rod is fixedly connected to the piston, and the piston can abut or separate from the lower surface of the top plate.

[0011] As a preferred embodiment of the workpiece positioning device, the top plate is attached to the upper surface of the positioning plate, and the upper surface of the positioning plate is provided with a protrusion. The distance between the upper surface of the protrusion and the upper surface of the positioning plate is greater than the distance between the upper surface of the top plate and the upper surface of the positioning plate.

[0012] As a preferred embodiment of the workpiece positioning device, it also includes a base, and two positioning mechanisms are provided, with both positioning mechanisms slidably disposed on the base.

[0013] As a preferred embodiment of the workpiece positioning device, it further includes a drive mechanism for driving the two positioning mechanisms to move so that the two positioning mechanisms move closer to or further away from each other.

[0014] As a preferred embodiment of the workpiece positioning device, it further includes a base and two clamping mechanisms, wherein the positioning mechanisms are connected to the base and the two clamping mechanisms can approach each other to clamp the workpiece.

[0015] As a preferred embodiment of the workpiece positioning device, the clamping mechanism includes a linear drive mechanism and a clamping plate. The linear drive mechanism has a fixed end and a telescopic end that can reciprocate and extend relative to the fixed end. The fixed end is fixedly connected to the base, and the telescopic end is fixedly connected to the clamping plate. The linear drive mechanisms of the two clamping mechanisms can respectively drive the clamping plates of the two clamping mechanisms to move, so that the clamping plates of the two clamping mechanisms move closer to each other or further away from each other.

[0016] As a preferred embodiment of the workpiece positioning device, a pressure sensor is also provided on the side surface of the clamping plate closest to the workpiece.

[0017] The beneficial effects of this utility model are:

[0018] This utility model provides a workpiece positioning device for mounting workpieces, the workpieces having positioning holes. The workpiece positioning device includes a positioning mechanism, which includes a positioning plate and a positioning pin assembly. The positioning plate has multiple positioning pin mounting holes. The positioning pin assembly includes a mounting sleeve and a positioning rod. The mounting sleeve is detachably mounted in any of the positioning pin mounting holes. The positioning rod can slide relative to the mounting sleeve and has an extended position and a retracted position. When the positioning rod is in the extended position, it extends out of the mounting sleeve, and the positioning hole of the workpiece can be inserted and engaged with the positioning rod. When the positioning rod is in the retracted position, it retracts into the mounting sleeve. Because the mounting sleeve of the locating pin assembly is detachably installed in any locating pin mounting hole, the mounting sleeve can be installed in a suitable locating pin mounting hole according to the position of the locating hole of different workpiece models, thus enabling the workpiece positioning device to adapt to various workpiece models. In addition, when installing the workpiece, the locating rod can be moved to the retracted position, at which time the locating rod retracts into the mounting sleeve, which will not obstruct the installation of the workpiece. After the workpiece is installed in place, the locating rod can be moved to the extended position, at which time the locating rod extends out of the mounting sleeve and can be inserted and engaged with the locating hole of the workpiece to achieve positioning. Attached Figure Description

[0019] Figure 1 This is a first structural schematic diagram of the workpiece positioning device in an embodiment of this utility model;

[0020] Figure 2 This is a second structural schematic diagram of the workpiece positioning device in an embodiment of this utility model;

[0021] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a schematic diagram of the positioning pin assembly in an embodiment of this utility model;

[0023] Figure 5 This is a partial structural schematic diagram of the workpiece positioning device in an embodiment of this utility model.

[0024] In the picture:

[0025] 1. Base;

[0026] 2. Positioning mechanism; 21. Positioning plate; 211. Positioning pin mounting hole; 212. Protrusion; 22. Positioning pin assembly; 221. Mounting sleeve; 2211. Top plate; 2212. Through hole; 222. Piston; 223. Elastic element; 224. Positioning rod;

[0027] 3. Clamping mechanism; 31. Linear drive mechanism; 311. Fixed end; 312. Telescopic end; 32. Clamping plate; 321. Rubber pad; 33. Guide rod;

[0028] 4. Drive mechanism; 41. Double-acting lead screw; 42. Bearing housing; 43. Threaded sleeve; 44. Drive motor; 45. Linear guide rail; 46. Slider;

[0029] 5. Clamping force adjustment module; 51. Pressure sensor; 52. Controller; 53. Adjusting valve. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] In related technologies, the workpiece has positioning holes, and the positioning fixture is equipped with positioning pins. During installation, the workpiece is mounted on the positioning fixture, and the positioning pins and positioning holes are fitted together to achieve positioning. Subsequently, the workpiece and positioning fixture are locked together by clamping blocks, locking screws, and other locking structures to complete the installation. However, in the above solutions, the positioning pins are generally fixed on the positioning fixture, which has two problems. First, since the position of the positioning pins cannot be adjusted, one type of positioning fixture can only be used for workpieces of the same model. Second, during workpiece installation, the positioning pins may obstruct the movement of the workpiece.

[0035] In response to this, this embodiment provides a workpiece positioning device to solve the problem in the related art that a positioning fixture can only be adapted to workpieces of the same model, and that the positioning pin may cause some obstruction to the movement of the workpiece when it is installed. It can be used in the field of workpiece processing technology.

[0036] Reference Figures 1-5 The workpiece positioning device is used to install workpieces, and the workpieces have positioning holes. The workpiece positioning device includes a positioning mechanism 2, which includes a positioning plate 21 and a positioning pin assembly 22. The positioning plate 21 has multiple positioning pin mounting holes 211. The positioning pin assembly 22 includes a mounting sleeve 221 and a positioning rod 224. The mounting sleeve 221 is detachably disposed in any positioning pin mounting hole 211. The positioning rod 224 can slide relative to the mounting sleeve 221 and has an extended position and a retracted position. When the positioning rod 224 is in the extended position, the positioning rod 224 extends out of the mounting sleeve 221, and the positioning hole of the workpiece can be inserted and engaged with the positioning rod 224. When the positioning rod 224 is in the retracted position, the positioning rod 224 retracts into the mounting sleeve 221. Since the mounting sleeve 221 of the positioning pin assembly 22 is detachably installed in any positioning pin mounting hole 211, the mounting sleeve 221 can be installed in a suitable positioning pin mounting hole 211 according to the position of the positioning hole of different types of workpieces, so that the workpiece positioning device can be adapted to various types of workpieces. In addition, when installing the workpiece, the positioning rod 224 can be moved to the retracted position. At this time, the positioning rod 224 retracts into the mounting sleeve 221 and will not obstruct the installation of the workpiece. After the workpiece is installed in place, the positioning rod 224 can be moved to the extended position. At this time, the positioning rod 224 extends out of the mounting sleeve 221 and can be inserted and engaged with the positioning hole of the workpiece to achieve positioning.

[0037] Continue to refer to Figures 1-5An elastic element 223 is provided between the bottom wall of the mounting sleeve 221 and the positioning rod 224. The elastic element 223 is used to provide an elastic force to make the positioning rod 224 move toward the extended position, so that the positioning rod 224 always has a tendency to move toward the extended position in the initial state. When installing the workpiece, the positioning rod 224 can be pressed into the retracted position by the workpiece, which can avoid the positioning rod 224 from obstructing the movement of the workpiece. After the workpiece is installed in place, the positioning hole of the workpiece is aligned with the positioning rod 224. At this time, the positioning rod 224 can automatically pop out under the action of the elastic element 223 and insert into the positioning hole to complete the positioning.

[0038] Optionally, the upper end of the positioning rod 224 is tapered, which can play a certain guiding role. When the positioning rod 224 is close to the positioning hole of the workpiece, the tapered outer wall can guide the hole wall of the positioning hole, so that the positioning rod 224 can be smoothly inserted into the positioning hole.

[0039] As an alternative, the positioning rod 224 can also be driven by a cylinder or other drive component, and the drive component can be controlled manually or by a relevant control program to indirectly adjust the position of the positioning rod 224.

[0040] Continue to refer to Figures 1-5 Multiple positioning pin assemblies 22 are provided, and multiple mounting sleeves 221 of the multiple positioning pin assemblies 22 are correspondingly arranged in multiple positioning pin mounting holes 211. It can be understood that if the positioning hole of the workpiece only needs to cooperate with some of the positioning pin assemblies 22, the positioning pin assemblies 22 that are not used can be removed from the positioning plate 21. Alternatively, the positioning pin assemblies 22 can be retained, and the positioning rods 224 of the positioning pin assemblies 22 can be pressed into the retracted position by the workpiece.

[0041] Continue to refer to Figures 1-5 The top of the mounting sleeve 221 is provided with a top plate 2211, and the top plate 2211 has a through hole 2212 communicating with the inner cavity of the mounting sleeve 221. The positioning rod 224 passes through the through hole. The inner cavity of the mounting sleeve 221 is provided with a piston 222, and the positioning rod 224 is fixedly connected to the piston 222. The piston 222 can abut or separate from the lower surface of the top plate 2211, thereby limiting the maximum movement distance of the piston 222 through the top plate 2211, and thus limiting the maximum extension distance of the positioning rod 224, preventing excessive movement when the positioning rod 224 extends. Optionally, the elastic element 223 is a compression spring, and one end of the elastic element 223 abuts against the bottom wall of the mounting sleeve 221, and the other end abuts against the piston 222. Optionally, the mounting sleeve 221 is provided with external threads and is threadedly engaged with the locating pin mounting hole 211. The top plate 2211 is fixedly installed with the mounting sleeve 221, and the top plate 2211 is hexagonal. When the user disassembles or assembles the mounting sleeve 221, he can use a wrench to turn the top plate 2211, thereby simultaneously driving the mounting sleeve 221 to rotate.

[0042] Continue to refer to Figures 1-5 Another problem with the above structure is that after the workpiece is installed on the positioning plate 21, it may adhere to the surface of the positioning plate 21 and be difficult to remove. In this embodiment, the top plate 2211 is attached to the upper surface of the positioning plate 21, and the upper surface of the positioning plate 21 is provided with a protrusion 212. The distance between the upper surface of the protrusion 212 and the upper surface of the positioning plate 21 is greater than the distance between the upper surface of the top plate 2211 and the upper surface of the positioning plate 21, so that the surface of the workpiece will not directly contact the top plate 2211, making it easier to remove the workpiece from the positioning plate 21 and improving the convenience of operation.

[0043] Continue to refer to Figures 1-5 The workpiece positioning device also includes a base 1, and two positioning mechanisms 2 are provided, both of which are slidably disposed on the base 1. The workpiece is provided with two or more positioning holes, some of which cooperate with the positioning pin assembly 22 of one of the positioning mechanisms 2, and the other part of the positioning holes cooperate with the positioning pin assembly 22 of the other positioning mechanism 2. By providing two positioning mechanisms 2, the position of the positioning mechanism 2 can be adjusted according to the position of the positioning hole of the workpiece so that they can be adapted to each other.

[0044] Continue to refer to Figures 1-5 The workpiece positioning device also includes a drive mechanism 4, which drives the two positioning mechanisms 2 to move, so that the two positioning mechanisms 2 move closer to each other or further away from each other. In this embodiment, specifically, the two positioning mechanisms 2 move closer to each other or further away from each other along a first direction, wherein the first direction is... Figures 1-2 The first direction is parallel to the horizontal plane, specifically the CD direction. The drive mechanism 4 includes a bidirectional lead screw 41, a drive motor 44, two bearing seats 42, and two threaded sleeves 43. The bidirectional lead screw 41 extends along the first direction and has both positive and negative threads. The inner rings of the two bearing seats 42 are respectively connected to the two ends of the bidirectional lead screw 41. The two threaded sleeves 43 are respectively fixedly connected to the positioning plates 21 of the two positioning mechanisms 2, and are respectively threadedly connected to the positive and negative threads of the bidirectional lead screw 41. The drive motor 44 is fixedly mounted on the base 1, and its output end is fixedly connected to the bidirectional lead screw 41, driving the bidirectional lead screw 41 to rotate, thereby causing the two threaded sleeves 43 to move closer or further apart along the first direction, thus causing the two positioning mechanisms 2 to move closer or further apart along the first direction.

[0045] Continue to refer to Figures 1-5The workpiece positioning device also includes two clamping mechanisms 3. The positioning mechanism 2 is connected to the base 1. The two clamping mechanisms 3 can approach each other to clamp the workpiece, so that after the workpiece is positioned, it can still be clamped by the two clamping mechanisms 3 to fix the workpiece in place. The two clamping mechanisms 3 can approach or move away from each other along a second direction, which is... Figures 1-2 In the EF direction, the first direction is perpendicular to the second direction, and both the first direction and the second direction are parallel to the horizontal plane.

[0046] Continue to refer to Figures 1-5 The clamping mechanism 3 includes a linear drive mechanism 31 and a clamping plate 32. The linear drive mechanism 31 has a fixed end 311 and a telescopic end 312 that can reciprocate relative to the fixed end 311. The fixed end 311 is fixedly connected to the base 1, and the telescopic end 312 is fixedly connected to the clamping plate 32. The linear drive mechanisms 31 of the two clamping mechanisms 3 can respectively drive the clamping plates 32 of the two clamping mechanisms 3 to move, so that the clamping plates 32 of the two clamping mechanisms 3 move closer or further away from each other, thereby achieving clamping of the workpiece or separation from the surface of the workpiece. Specifically, the linear drive mechanism 31 can be a pneumatic cylinder or a hydraulic cylinder. Optionally, a rubber pad 321 is also provided at the end of the clamping plate 32 near the workpiece to provide cushioning and prevent excessive clamping force from damaging the workpiece. Optionally, a guide rod 33 is also fixedly provided at the telescopic end 312, and the guide rod 33 slides with the fixed end 311, thereby making the relative sliding between the telescopic end 312 and the fixed end 311 smoother.

[0047] Continue to refer to Figures 1-5 Continue to refer to Figures 1-5 A pressure sensor 51 is also provided on the surface of the clamping plate 32 near the workpiece, so that the clamping force applied by the clamping plate 32 to the workpiece surface can be obtained through the pressure sensor 51. Optionally, the workpiece positioning device also includes a clamping force adjustment module 5, which includes a controller 52 and an adjusting valve 53. The adjusting valve 53 is used to adjust the output pressure of the linear drive mechanism 31, and the pressure sensor 51 is used to send the acquired data to the controller 52. The controller 52 can control the opening of the adjusting valve 53 according to the magnitude of the clamping force, thereby adjusting the output pressure of the linear drive mechanism 31 to change the magnitude of the clamping force of the clamping plate 32, so that the clamping force on the workpiece is kept within a certain range, avoiding excessive clamping force causing workpiece deformation, or insufficient clamping force causing workpiece loosening.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A workpiece positioning device for mounting a workpiece, wherein the workpiece has a positioning hole; characterized in that, Includes a positioning mechanism (2), said positioning mechanism (2) comprising: The positioning plate (21) has multiple positioning pin mounting holes (211). The positioning pin assembly (22) includes a mounting sleeve (221) and a positioning rod (224). The mounting sleeve (221) is detachably disposed in any of the positioning pin mounting holes (211). The positioning rod (224) is slidable relative to the mounting sleeve (221) and has an extended position and a retracted position. When the positioning rod (224) is in the extended position, the positioning rod (224) extends out of the mounting sleeve (221), and the positioning hole of the workpiece can be inserted and engaged with the positioning rod (224). When the positioning rod (224) is in the retracted position, the positioning rod (224) retracts into the mounting sleeve (221).

2. The workpiece positioning device according to claim 1, characterized in that, An elastic element (223) is provided between the bottom wall of the mounting sleeve (221) and the positioning rod (224), the elastic element (223) being used to provide an elastic force that causes the positioning rod (224) to move toward the extended position.

3. The workpiece positioning device according to claim 1, characterized in that, The positioning pin assembly (22) is provided in multiple ways, and the multiple mounting sleeves (221) of the multiple positioning pin assemblies (22) are respectively arranged in the multiple positioning pin mounting holes (211).

4. The workpiece positioning device according to claim 1, characterized in that, The top of the mounting sleeve (221) is provided with a top plate (2211), and the top plate (2211) has a through hole (2212) communicating with the inner cavity of the mounting sleeve (221). The positioning rod (224) passes through the through hole. The inner cavity of the mounting sleeve (221) is provided with a piston (222), and the positioning rod (224) is fixedly connected to the piston (222). The piston (222) can abut or separate from the lower surface of the top plate (2211).

5. The workpiece positioning device according to claim 4, characterized in that, The top plate (2211) is attached to the upper surface of the positioning plate (21), and the upper surface of the positioning plate (21) is provided with a protrusion (212). The distance between the upper surface of the protrusion (212) and the upper surface of the positioning plate (21) is greater than the distance between the upper surface of the top plate (2211) and the upper surface of the positioning plate (21).

6. The workpiece positioning device according to any one of claims 1-5, characterized in that, It also includes a base (1), and two positioning mechanisms (2) are provided, and both positioning mechanisms (2) are slidably disposed on the base (1).

7. The workpiece positioning device according to claim 6, characterized in that, It also includes a drive mechanism (4) for driving the two positioning mechanisms (2) to move so that the two positioning mechanisms (2) move closer to each other or further away from each other.

8. The workpiece positioning device according to any one of claims 1-5, characterized in that, It also includes a base (1) and two clamping mechanisms (3), the positioning mechanism (2) being connected to the base (1), and the two clamping mechanisms (3) being able to approach each other to clamp the workpiece.

9. The workpiece positioning device according to claim 8, characterized in that, The clamping mechanism (3) includes a linear drive mechanism (31) and a clamping plate (32). The linear drive mechanism (31) has a fixed end (311) and a telescopic end (312) that can reciprocate relative to the fixed end (311). The fixed end (311) is fixedly connected to the base (1), and the telescopic end (312) is fixedly connected to the clamping plate (32). The linear drive mechanisms (31) of the two clamping mechanisms (3) can respectively drive the clamping plates (32) of the two clamping mechanisms (3) to move, so that the clamping plates (32) of the two clamping mechanisms (3) move closer to each other or further away from each other.

10. The workpiece positioning device according to claim 9, characterized in that, A pressure sensor (51) is also provided on the side surface of the clamping plate (32) near the workpiece.

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