A flexible fixture for precision machining part inspection

Abstract

The utility model discloses a kind of flexible clamps for precision machining part detection, it is related to workpiece clamping technical field, including tray body, multiple support components, at least one stand and at least one compression assembly;Multiple installation sites and positioning hole arrays are equipped on the tray body;The support component is adjustably mounted on the tray body by the installation site, for supporting workpiece;The utility model is through the matrix positioning hole array and installation groove on tray body, cooperate with the movable support that can rotate around single point and the fixed support that can be linearly adjusted, so that a set of tray system can be through quick adjustment to adapt to the clamping demand of multiple different shapes, size workpiece.This greatly reduces the dependence on special fixture, effectively solves the core pain point that fixture cost is high, switching is complicated under multi-variety, small-batch production mode, significantly shortens production preparation time.

Description

Technical Field

[0001] This utility model relates to the field of workpiece clamping technology, and in particular to a flexible clamp for the inspection of precision machined parts. Background Technology

[0002] In the field of automated machining and inspection of precision components (such as radar housings and antenna assemblies), the rapid, precise, and flexible clamping and transfer of workpieces between machining centers, coordinate measuring machines, or other intelligent equipment is a key link in ensuring production efficiency and measurement accuracy. As the core interface connecting robots and process equipment, the performance of the pallet clamping system directly determines the flexibility and overall efficiency of the automation system.

[0003] Currently, most common fixture systems employ dedicated designs, meaning they are designed and manufactured specifically for a particular workpiece shape and size. The disadvantages of this approach are obvious: long design and manufacturing cycles, high costs, and applicability only to a single product. When the production line needs to switch product models, the entire fixture system must be replaced, requiring tedious recalibration and debugging, severely limiting the efficiency of automation systems in multi-variety, small-batch production models.

[0004] Therefore, existing technologies lack a pallet clamping solution that can simultaneously meet the requirements of high-precision positioning, rapid flexible adjustment, strong rigidity and stability, and deep integration with automated systems. This invention aims to overcome the shortcomings of the existing technology by providing an innovative flexible pallet design, making it an ideal workpiece carrying and exchange platform in high-precision intelligent inspection and processing systems. Utility Model Content

[0005] This invention provides a flexible fixture for inspecting precision machined parts, which solves the technical problems of existing fixtures having long design cycles, high costs, and inability to adapt to various product models.

[0006] To solve the above-mentioned technical problems, this utility model provides a flexible fixture for inspecting precision machined parts, including a tray body, multiple support components, at least one column, and at least one clamping component; the tray body is provided with multiple mounting positions and an array of positioning holes; the support components are adjustablely mounted on the tray body through the mounting positions to support the workpiece; the column is mounted on the tray body, and the column includes a vertically extending rod with multiple height positioning parts distributed along the height direction; the clamping component is slidably fitted onto the rod of the column and fixes the height position of the clamping component by cooperating with the height positioning parts; the clamping component includes a first clamping part and a second clamping part arranged opposite to each other, and an adjustment mechanism for driving the second clamping part to move toward or away from the first clamping part; flexible pads are provided on the surfaces of the first clamping part and the second clamping part opposite to each other.

[0007] Preferably, the support assembly includes a movable support and a fixed support; the movable support is installed by a single fastener passing through a mounting hole on the pallet body and is rotatable about the fastener; the fixed support is installed by at least two fasteners passing through mounting slots on the pallet body and is adjustable in position along the length of the mounting slots.

[0008] Preferably, the top of the fixed support is provided with a flexible support block, and the flexible support block has a right-angle positioning groove that matches the corner of the workpiece.

[0009] Preferably, the top surface of the movable support and the top surface of the fixed support are at the same horizontal height.

[0010] Preferably, the bottom of the column is provided with a mounting base, which is connected to the positioning hole array by fasteners; the rod body is a square rod, and multiple sets of height positioning pin holes are opened on its side to form the height positioning part.

[0011] Preferably, the clamping assembly includes a height adjusting sleeve, a clamping plate seat, and a movable clamping plate; the height adjusting sleeve is sleeved on the rod body of the column, and the height adjusting sleeve has a fixing hole that mates with the height positioning part and is fixed by a pin; the clamping plate seat is located on one side of the height adjusting sleeve and forms the first clamping part; the movable clamping plate is arranged parallel to the clamping plate seat and forms the second clamping part; the adjusting mechanism includes two male and female studs, the external thread ends of the two male and female studs are respectively threaded to the clamping plate seat; the internal thread end of one male and female stud is connected to a threaded rod, the end of the threaded rod is provided with a fastening wheel, a spring is sleeved on the threaded rod, and the threaded rod is locked by a nut; the internal thread end of the other male and female stud is connected to a smooth rod screw, the smooth rod screw passes through a transverse groove opened on the movable clamping plate, and the smooth rod screw is locked by a nut.

[0012] Preferably, rotating the fastening wheel can drive the threaded rod to rotate and feed, thereby pushing the movable clamping plate to move along the guide screw, thus achieving the clamping and loosening of the workpiece.

[0013] Preferably, a first flexible pad and a second flexible pad are respectively provided on the surfaces opposite to the first clamping part and the second clamping part.

[0014] Preferably, the positioning hole array is a matrix-type through-hole array uniformly distributed on the tray body.

[0015] Compared with related technologies, the flexible fixture for inspecting precision machined parts provided by this utility model has the following advantages:

[0016] This invention provides a flexible fixture for inspecting precision-machined parts. The matrix array of positioning holes and mounting slots on the tray body, combined with a movable support that can rotate around a single point and a linearly adjustable fixed support, allow a single tray system to quickly adapt to the clamping needs of various workpiece shapes and sizes. This significantly reduces reliance on dedicated fixtures, effectively solving the core pain points of high fixture costs and cumbersome changeovers in multi-variety, small-batch production models, and significantly shortening production preparation time.

[0017] This invention provides a flexible fixture for inspecting precision-machined parts. The right-angled groove on the top of the fixed support matches the workpiece's reference angle, forming a reliable primary positioning reference. The column engages with the positioning hole array via a mounting base, and the clamping assembly engages with the square rod via pin holes, achieving precise and repeatable positioning in both the two-dimensional plane and the height direction. This multi-layered precision positioning mechanism ensures that the workpiece will not shift or loosen during processing or inspection, laying a solid foundation for high-precision operations.

[0018] This invention provides a flexible fixture for inspecting precision machined parts. After the workpiece is stably clamped, multiple surfaces are fully exposed, greatly facilitating multi-faceted measurement of the workpiece by inspection equipment such as coordinate measuring machines (CMMs), significantly improving inspection efficiency and accessibility. Simultaneously, the bottom of the tray body is equipped with a standardized robot gripping interface, enabling automatic gripping and transfer by robots or AGVs, achieving seamless integration with automated production lines or inspection units. This fixture is adaptable to a wide range of workpiece sizes, especially suitable for the inspection and clamping of precision machined parts with X-axis (length and width) of 100-250mm and Z-axis (height) of 100-450mm. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the tray structure of this utility model;

[0021] Figure 3 For the present utility model Figure 1 Schematic diagram of the structure at point A in the middle;

[0022] Figure 4 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0023] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0024] Figure 6 This is a schematic diagram of the structure of Embodiment 3 of this utility model;

[0025] Figure 7 This is a schematic diagram of the overall side structure of this utility model.

[0026] The following are the labeling elements in the diagram: 1. Pallet body; 2. Column; 3. Clamping assembly; 4. Movable support; 5. Fixed support; 11. Mounting hole; 12. Mounting groove; 13. Positioning hole array; 21. Height positioning pin hole; 31. Height adjustment sleeve; 32. Clamping plate seat; 33. Male and female studs; 34. Spring; 35. Movable clamping plate; 36. Fastening wheel; 37. First flexible pad; 38. Second flexible pad. Detailed Implementation

[0027] The above-mentioned and other technical features and advantages of this utility model will be described in more detail below with reference to the accompanying drawings.

[0028] Example 1

[0029] like Figure 1-4 As shown, this embodiment provides a flexible fixture for the inspection of precision machined parts, which can be used for the processing of large plate-shaped precision parts. The flexible tray includes a tray body 1, two uprights 2, three clamping components 3, multiple movable supports 4, and multiple fixed supports 5.

[0030] The tray body 1 is a rectangular plate structure made of high-strength aluminum alloy or steel. Its surface is machined with a matrix of evenly distributed positioning holes 13. In addition, the tray body 1 is also machined with mounting holes 11 and elongated mounting grooves 12.

[0031] First, based on the shape and size of the large workpiece to be processed, plan its support position on the pallet body 1. Select one right-angled side of the workpiece as the main positioning reference.

[0032] One of the fixed supports 5 is inserted into the mounting groove 12 of the pallet body 1 using at least two bolts and initially pre-tightened. Its position is adjusted so that the right-angle slot on the flexible support block at its top aligns with the predetermined corner of the workpiece. After adjustment, the bolts are fully tightened, providing the fixed support 5 with a unique and precise angular positioning reference for the workpiece.

[0033] The movable support 4 is arranged below other overhanging parts of the workpiece. The movable support 4 is installed by a bolt passing through the mounting hole 11. Due to its single-point fixation, the movable support 4 can swing and rotate on the pallet surface, ultimately ensuring that its top support surface perfectly conforms to the contour of the workpiece's bottom, providing stable auxiliary support. The top surface of the movable support 4 is adjusted to be flush with the horizontal plane of the right-angle groove of the fixed support 5, ensuring that the workpiece is in a stable horizontal state after being supported.

[0034] Next, install the clamping assembly 3 according to the clamping requirements of the workpiece.

[0035] Two uprights 2 of different heights are selected. The mounting base at the bottom of the upright 2 is connected to the positioning hole array 13 on the pallet body 1 by fasteners (such as hex bolts). The hole positions on the positioning hole array 13 can be flexibly selected according to the required clamping point of the workpiece. One upright 2 has a longer square rod and the other has a shorter rod to accommodate the clamping requirements of different heights on the workpiece surface.

[0036] Two clamping components 3 are mounted on the square rod of the longer column 2. One clamping component 3 is mounted on the shorter column 2. The height adjustment sleeve 31 of each clamping component 3 can slide on the square rod. By selecting different height positioning pin holes 21 and inserting positioning pins, the three clamping components 3 can be quickly locked at the required height to clamp the key parts of the workpiece.

[0037] The adjustment mechanism includes two male and female studs 33, the external threaded ends of which are respectively threaded to the clamping plate seat 32; one of the male and female studs 33 is connected to a threaded rod at its internal threaded end, the threaded rod is provided with a fastening wheel 36 at its end, a spring 34 is sleeved on the threaded rod, and the threaded rod is locked by a nut; the other male and female stud 33 is connected to a smooth rod screw at its internal threaded end, the smooth rod screw passes through a transverse groove opened on the movable clamping plate 35, and the smooth rod screw is locked by a nut.

[0038] Each clamping assembly 3 shall be operated as follows:

[0039] 1. Preliminary positioning: Place the workpiece on the support plane consisting of the fixed support 5 and the movable support 4. Rotate the fastening wheel 36 counterclockwise to allow the movable clamping plate 35 to retract, creating space for the workpiece. The movable clamping plate 35 can be pushed back by the spring 34.

[0040] 2. Place the workpiece: Place the workpiece in place so that the first flexible pad 37 on one side of the clamping plate seat 32 of the clamping assembly 3 is roughly aligned with the part of the upper surface of the workpiece that needs to be clamped.

[0041] 3. Clamping the workpiece: Rotate the fastening wheel 36 clockwise. The fastening wheel 36 moves on the threaded rod, thereby pushing the movable clamping plate 35 to move, and the movable clamping plate 35 moves along the smooth rod screw towards the clamping plate seat 32. During this process, the spring 34 sleeved on the threaded rod is compressed. The elastic force generated by the spring 34, together with the thread feed force, reliably clamps the workpiece through the first flexible pad 37 and the second flexible pad 38.

[0042] 4. Final locking: After the main clamping force is provided by the fastening wheel 36, the movable clamping plate 35 is locked by rotating the smooth rod screw to achieve double security and prevent loosening during processing.

[0043] The bottom of the pallet body 1 is designed with a standardized interface that matches the gripper of the robotic arm, enabling the entire flexible pallet to be grasped by the robot and transported to a machining center or coordinate measuring machine, realizing automated loading and inspection processes. This clamping method fully exposes the top and multiple sides of the workpiece, facilitating multi-faceted inspection by the coordinate measuring machine.

[0044] This fixture can accommodate a wide range of workpiece sizes, and is especially suitable for the inspection and clamping of precision machined parts with X-axis (length and width) of 100-250mm and Z-axis (height) of 100-450mm.

[0045] Example 2

[0046] The main difference from Embodiment 1 is the number of clamping components 3 used.

[0047] like Figure 5 As shown, in this embodiment, the workpiece is of medium size. Two columns 2, one long and one short, are still installed, both mounted on the positioning hole array 13 of the tray body 1. On the longer column 2, only one clamping assembly 3 is used to clamp the critical parts of the workpiece, leaving the other mounting position unused. On the shorter column 2, one clamping assembly 3 is still used. The configuration of the support portion is similar to that in Embodiment 1, relying on a fixed support 5 for angular positioning, and adjusting the positions of multiple movable supports 4 to adapt to the contour of the medium-sized workpiece.

[0048] Example 3

[0049] The main difference from Embodiment 1 and Embodiment 2 lies in the configuration of column 2.

[0050] like Figure 6As shown, due to the small size of the workpiece, a longer column 2 is unnecessary. In this embodiment, only a shorter column 2 is installed, which is also installed at the predetermined hole position of the positioning hole array 13, and a clamping component 3 is fitted on it to meet the clamping requirements of the workpiece. The support part only requires a small number of movable supports 4 and one fixed support 5. This configuration greatly simplifies the tooling structure on the pallet and provides convenience for the rapid clamping and processing of small workpieces.

Claims

1. A flexible fixture for inspecting precision-machined parts, characterized in that: The device includes a pallet body, multiple support components, at least one upright column, and at least one clamping component. The pallet body has multiple mounting positions and an array of positioning holes. The support components are adjustablely mounted on the pallet body via the mounting positions to support workpieces. The upright column is mounted on the pallet body and includes a vertically extending rod with multiple height positioning parts distributed along the height direction. The clamping component is slidably fitted onto the rod of the upright column and, by cooperating with the height positioning parts, fixes the height position of the clamping component. The clamping component includes a first clamping part and a second clamping part disposed opposite to each other, and an adjustment mechanism for driving the second clamping part to move toward or away from the first clamping part. Flexible pads are provided on the surfaces of the first clamping part and the second clamping part opposite to each other.

2. The flexible fixture for inspecting precision machined parts according to claim 1, characterized in that, The support assembly includes a movable support and a fixed support; the movable support is installed by a single fastener passing through a mounting hole on the pallet body and is rotatable about the fastener; the fixed support is installed by at least two fasteners passing through mounting slots on the pallet body and is adjustable in position along the length of the mounting slots.

3. A flexible fixture for inspecting precision machined parts according to claim 2, characterized in that, The top of the fixed support is provided with a flexible support block, which has a right-angle positioning groove that matches the corner of the workpiece.

4. A flexible fixture for inspecting precision machined parts according to claim 2, characterized in that, The top surface of the movable support and the top surface of the fixed support are at the same horizontal level.

5. A flexible fixture for inspecting precision machined parts according to claim 1, characterized in that, The bottom of the column is provided with a mounting base, which is connected to the positioning hole array by fasteners; the rod body is a square rod, and multiple sets of height positioning pin holes are opened on its side to form the height positioning part.

6. A flexible fixture for inspecting precision-machined parts according to claim 1 or 5, characterized in that, The clamping assembly includes a height adjusting sleeve, a clamping plate seat, and a movable clamping plate. The height adjusting sleeve is sleeved on the rod body of the column, and a fixing hole is opened on the height adjusting sleeve to cooperate with the height positioning part, and it is fixed by a pin. The clamping plate seat is located on one side of the height adjusting sleeve and forms the first clamping part. The movable clamping plate is arranged parallel to the clamping plate seat and forms the second clamping part. The adjusting mechanism includes two male and female studs, and the external thread ends of the two male and female studs are respectively threaded to the clamping plate seat. The internal thread end of one male and female stud is connected to a threaded rod, the end of the threaded rod is provided with a fastening wheel, a spring is sleeved on the threaded rod, and the threaded rod is locked by a nut. The internal thread end of the other male and female stud is connected to a smooth rod screw, the smooth rod screw passes through a transverse groove opened on the movable clamping plate, and the smooth rod screw is locked by a nut.

7. A flexible fixture for inspecting precision machined parts according to claim 6, characterized in that, Rotating the fastening wheel drives the threaded rod to rotate and feed, thereby pushing the movable clamping plate to move along the guide screw, thus achieving the clamping and loosening of the workpiece.

8. A flexible fixture for inspecting precision machined parts according to claim 6, characterized in that, The first clamping part and the second clamping part are respectively provided on their opposing surfaces.

9. A flexible fixture for inspecting precision machined parts according to claim 1, characterized in that, The positioning hole array is a matrix-type through-hole array uniformly distributed on the tray body.

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