Workpiece hole site qualification detection device

Abstract

The utility model relates to the technical field of hole site qualification detection, in particular to a workpiece hole site qualification detection device which comprises a supporting frame, guide supporting legs fixed on the periphery of the bottom of the supporting frame and a supporting plate located below the supporting frame and matched with the guide supporting legs in an up-down sliding mode. A plurality of detection heads corresponding to workpiece hole sites are installed on the upper portion of the supporting plate, and each detection head comprises a detection positioning pin capable of stretching out and drawing back up and down. By means of the device, the insertion and extraction operation of the detection positioning pin can be completed at a time, the operation efficiency is high, multiple times of repeated detection can be rapidly conducted, and single-time detection errors are avoided.

Description

Technical Field

[0001] This utility model relates to the field of hole position conformity detection technology, and in particular to a workpiece hole position conformity detection device. Background Technology

[0002] Before leaving the factory, the position of the mounting holes of the plunger holder must be inspected to prevent products with quality defects from leaving the factory.

[0003] Currently, the positional accuracy of plunger holder mounting holes is generally checked using a coordinate measuring machine (CMM). CMMs offer high precision, low error, and digitized measurement results. When a product fails to meet specifications, the technician can adjust the online mounting hole position based on the test results until the product's positional accuracy is acceptable. While CMMs offer these advantages, they also have drawbacks, such as high cost, limited configuration options, the need for specialized technicians, and long testing times.

[0004] To address the aforementioned issues, the applicant previously proposed a fixture for detecting the accuracy of the mounting hole position of a plunger holder, publication number: CN204461296U. This device uses a detection positioning pin that passes through a detection hole on the main body and extends into the mounting hole of the plunger holder under test for detection. If the detection positioning pin can extend into the mounting hole of the plunger holder under test, it is considered qualified; otherwise, it is unqualified. Although this device can detect the qualification of the hole position, since the plunger holder has multiple mounting holes, workers need to insert the pin into the alignment hole one by one during the detection process, resulting in low detection efficiency. Utility Model Content

[0005] The purpose of this invention is to solve the problem that although existing devices can detect the conformity of hole positions, the detection efficiency is low because the plunger holder has multiple mounting holes, requiring workers to insert each hole one by one. Therefore, this invention proposes a workpiece hole position conformity detection device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A workpiece hole position qualification detection device includes a support frame, guide legs fixed around the bottom of the support frame, and a support plate located below the support frame and slidingly engaged with the guide legs. Several detection heads corresponding to the workpiece hole positions are installed on the upper part of the support plate. Each detection head includes a detection positioning pin that can extend and retract vertically.

[0008] A tension spring is fitted on the guide leg, with one end of the tension spring fixed to the support frame and the other end fixed to the support plate.

[0009] The detection head includes a base plate, which is detachably assembled with the support plate. A guide cylinder is fixedly connected to the top surface of the base plate. The lower part of the detection positioning pin is slidably connected to the guide cylinder, and a thrust spring is installed between the bottom end of the detection positioning pin and the bottom wall of the guide cylinder.

[0010] The base plate is a ferromagnetic metal plate, and a permanent magnet block that can magnetically attract the base plate is fixed to the bottom of the support plate.

[0011] A rubber pad is attached to the top surface of the support plate.

[0012] A pull rope is connected to the bottom of the support plate.

[0013] A cover is rotatably connected to the support frame via a hinge. The cover can seal the top surface of the support frame around the hinge. An ink pad is provided on the side of the cover near the support frame, and the top surface of the detection positioning pin can abut against the ink pad.

[0014] The present invention provides a workpiece hole position qualification detection device, which has the following advantages: the device can complete the insertion and removal of the detection positioning pin in one go, which not only has high operation efficiency, but also allows for multiple retests quickly, avoiding single detection errors. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the detection and positioning pin for the state of ink application in this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the present invention when placing the workpiece;

[0017] Figure 3 This is a schematic diagram of the qualified hole position structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the main view structure of the present invention with defective hole positions;

[0019] Figure 5 This is a bottom view schematic diagram of the non-compliant hole position structure of this utility model.

[0020] In the diagram: 1. Hinge; 2. Inkpad; 3. Detection and positioning pin; 4. Cover; 5. Guide tube; 6. Support frame; 7. Thrust spring; 8. Tension spring; 9. Support plate; 10. Base plate; 11. Guide leg; 12. Permanent magnet block; 13. Pull rope; 14. Detection head; 15. Rubber pad. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-5 A workpiece hole position qualification detection device includes a support frame 6, guide legs 11 fixed around the bottom of the support frame 6, and a support plate 9 located below the support frame 6 and slidingly engaged with the guide legs 11. Several detection heads 14 corresponding to the workpiece hole positions are installed on the upper part of the support plate 9. The detection head 14 includes a detection positioning pin 3 that can extend and retract vertically.

[0023] This device first processes and inspects the positioning pins according to the hole position diagram and dimensional tolerances of the plunger holder to determine the position of the inspection head 14 on the support plate 9. Then, it uses a coordinate measuring machine to inspect the positioning pin 3 to determine whether it meets the position requirements. The coordinate measuring machine is used periodically to inspect the tooling to ensure the accuracy of the tooling.

[0024] In use, the support frame 6 is securely placed on the inspection workbench. The guide legs 11 are fixed around the bottom of the support frame 6 and serve as a guide structure to restrict the vertical sliding path of the support plate 9. The support plate 9 is located between the guide legs 11 and can move up and down along the guide direction. Several inspection heads 14 are installed on the upper part of the support plate 9. Each inspection head 14 corresponds to a hole in the workpiece being inspected. Each inspection head 14 is equipped with an inspection positioning pin 3, which can extend and retract vertically within the inspection head 14.

[0025] refer to Figure 2 During testing, the plunger holder to be tested is placed above the support frame 6. The support plate 9 is moved downwards away from the support frame 6, and then the support plate 9 is moved upwards. Multiple testing heads 14 move upwards simultaneously. (Refer to...) Figure 3 When the hole positions are acceptable, each detection locating pin 3 can pass through the hole in the plunger holder. (Refer to...) Figure 4 When the hole position is not qualified, at least one detection positioning pin 3 is in a compressed state. The support plate 9 can be moved up and down repeatedly to perform multiple retests and avoid single-test errors.

[0026] This device allows for the insertion and removal of the positioning pin in one operation, which is not only highly efficient but also enables multiple retests to be performed quickly, avoiding errors from a single test.

[0027] A tension spring 8 is fitted on the guide leg 11. One end of the tension spring 8 is fixed to the support frame 6 and the other end is fixed to the support plate 9.

[0028] When the support plate 9 moves downward along the guide leg 11, the tension spring 8 is stretched and stores elastic potential energy. After the external force is released, the tension spring 8 generates an upward pulling force, automatically pulling the support plate 9 upward back.

[0029] The tension spring 8 provides a continuous upward force on the support plate 9, so that in the actual testing process, the operator only needs to manually pull the support plate 9 down for initial preparation. After the lowering is completed, no additional pulling action is required. When the operator releases the hand, the tension spring 8 will automatically restore the position of the support plate 9, thereby driving the detection positioning pin 3 in the detection head 14 to move upward.

[0030] This structural design simplifies the operation process, improves testing efficiency, and reduces manual workload. Meanwhile, the repeated stretching and rebound of the tension spring 8 allows for multiple up-and-down reciprocating movements, facilitating multiple rounds of retesting of the hole positions, effectively avoiding single-test errors, and improving testing accuracy and stability.

[0031] The detection head 14 includes a base plate 10, which is detachably assembled with a support plate 9. A guide cylinder 5 is fixedly connected to the top surface of the base plate 10. The lower part of the detection positioning pin 3 is slidably connected to the guide cylinder 5, and a thrust spring 7 is installed between the bottom end of the detection positioning pin 3 and the bottom wall of the guide cylinder 5.

[0032] The detection head 14 includes a base plate 10, which is detachably connected to the support plate 9 for easy installation and replacement. A guide cylinder 5 is fixed to the top surface of the base plate 10, and the lower part of the detection positioning pin 3 can slide up and down within the guide cylinder 5. A thrust spring 7 is installed between the bottom wall of the guide cylinder 5 and the bottom end of the detection positioning pin 3 to push the detection positioning pin 3 upward, enabling it to automatically return to its original position.

[0033] In one embodiment, the base plate 10 is a ferromagnetic metal plate, and a permanent magnet block 12 that can magnetically attract the base plate 10 is fixed to the bottom of the support plate 9.

[0034] The base plate 10 is made of ferromagnetic metal material, and a permanent magnet block 12 is fixed to the bottom of the support plate 9. The permanent magnet block 12 attracts the base plate 10 through magnetic force, so that the detection head 14 can be stably attached to the top surface of the support plate 9.

[0035] During the testing process, the tension spring 8 provides an upward pulling force on the support plate 9, enabling the support plate 9 to automatically return to its original position, facilitating multiple up-and-down movements during the testing process. When the support plate 9 moves upward, magnetic attraction ensures that the detection head 14 always moves firmly and synchronously with the support plate 9, maintaining the precise insertion path of each detection positioning pin 3.

[0036] With magnetic connection, the detection head 14 is not only easy to install, but also can move and adjust its position freely on the top surface of the support plate 9 according to the hole layout of different workpieces. This structure facilitates the replacement of tooling components and adapts to the detection needs of various types of workpieces. For different hole positions, only detection positioning pins 3 of appropriate length or diameter need to be configured to quickly achieve compatible detection, improving the versatility and practicality of the device.

[0037] A rubber pad 15 is attached to the top surface of the support plate 9 to increase the friction between the base plate 10 and the support plate 9. Under the action of magnetic force, the detection head 14 is stably supported on the support plate 9.

[0038] A pull rope 13 is connected to the bottom of the support plate 9 to facilitate control of the movement of the support plate 9.

[0039] A cover 4 is rotatably connected to the support frame 6 via a hinge 1. The cover 4 can cover the top surface of the support frame 6 around the hinge 1. An ink pad 2 is provided on the side of the cover 4 near the support frame 6. The top surface of the detection positioning pin 3 can abut against the ink pad 2.

[0040] refer to Figure 5 , Figure 1 A cover 4 is rotatably connected to the support frame 6 via a hinge 1. The cover 4 can be flipped around the hinge 1 and covers the top surface of the support frame 6. An ink pad 2 is provided on the side of the cover 4 near the support frame 6. Before testing, the cover 4 can be closed so that the top surfaces of all the testing positioning pins 3 press on the ink pad 2 at the same time, thereby evenly picking up the ink pad.

[0041] During the inspection process, when the support plate 9 drives the inspection positioning pin 3 to move upward, if the hole position is qualified, the inspection positioning pin 3 can smoothly pass into the hole and its top will not contact the workpiece surface; if the hole position is not qualified, the inspection positioning pin 3 will be blocked and unable to be inserted into the hole, its top will contact the workpiece surface and leave an ink mark at the contact position.

[0042] By observing the position of the imprint left by the detection positioning pin 3 on the workpiece surface, the offset direction and degree of misalignment of the corresponding hole position can be intuitively determined, thus providing a basis for process adjustment or classification of non-conforming products. This structure not only has the basic function of hole position conformity detection, but also realizes the misalignment calibration of non-conforming holes, enhancing the functional versatility and practical value of the device.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technical solution, concept, or design obtained by those skilled in the art by making equivalent substitutions or changes based on the technical solution and utility model concept disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A workpiece hole location acceptability detection device, characterized by, It includes a support frame (6), guide legs (11) fixed around the bottom of the support frame (6), and a support plate (9) located below the support frame (6) and slidingly engaged with the guide legs (11). Several detection heads (14) corresponding to the workpiece holes are installed on the upper part of the support plate (9). The detection head (14) includes a detection positioning pin (3) that can extend and retract vertically.

2. The workpiece hole location acceptability detection device of claim 1, wherein, A tension spring (8) is fitted on the guide leg (11). One end of the tension spring (8) is fixed to the support frame (6), and the other end is fixed to the support plate (9).

3. The workpiece hole location acceptability detection device of claim 2, wherein, The detection head (14) includes a base plate (10), which is detachably assembled with the support plate (9). A guide cylinder (5) is fixedly connected to the top surface of the base plate (10). The lower part of the detection positioning pin (3) is slidably connected to the guide cylinder (5), and a thrust spring (7) is installed between the bottom end of the detection positioning pin (3) and the bottom wall of the guide cylinder (5).

4. The workpiece hole location acceptability detection device of claim 3, wherein, The base plate (10) is a ferromagnetic metal plate, and a permanent magnet block (12) that can magnetically attract the base plate (10) is fixed to the bottom of the support plate (9).

5. The workpiece hole location acceptability detection device of claim 4, wherein, A rubber pad (15) is attached to the top surface of the support plate (9).

6. The device for detecting the eligibility of a hole site of a workpiece according to any one of claims 2-5, characterized in that, The bottom of the support plate (9) is connected to a pull rope (13).

7. The device for detecting the eligibility of a hole site of a workpiece according to any one of claims 1-5, characterized in that, The support frame (6) is rotatably connected to a cover (4) via a hinge (1). The cover (4) can cover the top surface of the support frame (6) around the hinge (1). An ink pad (2) is provided on the side of the cover (4) near the support frame (6). The top surface of the detection positioning pin (3) can abut against the ink pad (2).

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