A kind of over-positioning keyway measuring tool is avoided

Abstract

The utility model discloses a kind of avoid over-positioning keyway measuring tool, it belongs to the field of measuring tool, including base, be equipped with round platform on base, the center of round platform is equipped with center hole measuring head, the circumference of center hole measuring head is equipped with several small hole measuring head, the position of small hole measuring head corresponds with the position of small hole on the workpiece to be detected;Slide rail is equipped on the base of round platform outside, slider is slid on slide rail, long key block extending to round platform direction is equipped on slider, long key block front end is equipped with opening slot measuring head, the width of opening slot can be measured by opening slot measuring head;Center hole measuring head, small hole measuring head, opening slot measuring head are all connected with digital display instrument, the size measured by measuring head can be shown by digital display instrument.The above structure can utilize a slide rail type key block, the angle and size of opening slot are detected quickly, and the efficiency of workpiece placement tool is greatly improved, indirectly improves detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of measuring fixtures, specifically to a measuring fixture that avoids over-positioning keyways. Background Technology

[0002] The workpiece to be measured in this solution is similar to a flange structure. The workpiece has a central hole with several smaller holes around it. These smaller holes are not evenly distributed around the circumference. The testing fixture needs to use a pneumatic measuring instrument to simultaneously measure the diameter of both the central hole and the smaller holes. During the measurement, the central hole and the smaller holes on the workpiece must be aligned with the corresponding pneumatic measuring heads before being placed on the fixture. However, the workpiece that needs to be measured now has an additional structure: an opening slot on the side wall. This opening slot is machined independently during actual workpiece processing, and its relative position must be measured. The current measuring fixture uses a long key block at the opening slot position, but it has been found that when the workpiece is placed on the fixture, there are often positioning problems between the pneumatic measuring head with the small hole and the long key block. Although the actual workpiece can be placed on the fixture, the efficiency of workers placing the workpiece is very low because both the pneumatic measuring head with the small hole and the long key block must be considered.

[0003] Currently, in order to improve efficiency, we only consider meeting the dimensions and position inside the opening slot. This only requires adding an extra pneumatic measuring head. However, since the angle of the opening slot cannot be detected, defective products still appear during quality inspection, causing trouble for the company.

[0004] In view of the problems existing in the prior art, this utility model designs and manufactures a measuring fixture that avoids over-positioning keyway to overcome the above defects. Summary of the Invention

[0005] To address the problems existing in the prior art, this utility model provides a measuring fixture that avoids over-positioning keyways. It can quickly detect the angle and size of the opening slot using a sliding key block, and the efficiency of placing the workpiece on the fixture is greatly improved, which indirectly improves the detection efficiency.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a measuring fixture for avoiding over-positioning keyways, including a base, a circular platform on the base, a central hole measuring head at the center of the circular platform, and a plurality of small hole measuring heads around the central hole measuring head, the positions of the small hole measuring heads corresponding to the positions of the small holes on the workpiece to be inspected; The base on the outer side of the circular platform is provided with a slide rail, a slider slides on the slide rail, a long key block extends towards the circular platform on the slider, and an opening groove measuring head is provided at the front end of the long key block, which can measure the width of the opening groove. The center hole measuring head, the small hole measuring head, and the open slot measuring head are all connected to a digital display, which can display the dimensions measured by the measuring head.

[0007] Preferably, a limiting block is provided at the end of the slide rail away from the circular platform, and the limiting block can restrict the sliding position of the slider.

[0008] Preferably, when the slider abuts against the limiting block, the end of the opening groove measuring head is a certain distance from the outer wall of the workpiece to be inspected.

[0009] Preferably, the height of the long key block is higher than the height of the circular platform.

[0010] Preferably, the circular platform is provided with an anti-interference opening groove at the slide rail position corresponding to the base.

[0011] Preferably, the upper ends of both the central hole measuring head and the small hole measuring head are truncated cone-shaped.

[0012] The advantages of this utility model are: This invention relates to a workpiece inspection system. When placing the workpiece on a circular platform, only the alignment of the workpiece's center hole and small hole with the center hole measuring head and small hole measuring head needs to be considered. The positioning of the opening slot on the workpiece is not required. Since one positioning reference is eliminated, the placement of the workpiece is faster. The opening slot is detected using a sliding key block. Before the workpiece is placed on the circular platform, the key block moves away from the platform. After the workpiece is placed, the key block slides into the opening slot to detect its angle and size, ensuring the accuracy of these measurements. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a measuring fixture for avoiding over-positioning keyways; Figure 2 This is a schematic diagram of a tooling structure for inspecting workpieces by avoiding over-positioning keyway measurement. Figure 3 This is a schematic diagram of the structure of the workpiece to be tested according to this utility model.

[0014] In the diagram: 1. Base; 2. Circular platform; 3. Small hole measuring head; 4. Center hole measuring head; 5. Slide rail; 6. Slider; 7. Long key block; 8. Anti-interference opening slot; 10. Center hole; 11. Small hole; 12. Opening slot. Detailed Implementation

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] like Figures 1 to 3As shown, a measuring fixture for avoiding over-positioning keyways includes a base 1, a circular platform 2 on the base 1, a central hole measuring head 4 at the center of the circular platform 2, and several small hole measuring heads 3 arranged around the central hole measuring head 4. The distribution of the small hole measuring heads 3 is not uniformly distributed around the circumference. The position of the small hole measuring heads 3 corresponds to the position of the small hole 11 on the workpiece to be inspected. When inspecting the workpiece, when the workpiece is placed on the circular platform 2, it is only necessary to consider the cooperation between the central hole 10 and the small hole 11 on the workpiece and the central hole measuring head 4 and the small hole measuring heads 3.

[0017] A slide rail 5 is provided on the base outside the circular platform 2. A slider 6 slides on the slide rail 5. A long key block 7 extending towards the circular platform is provided on the slider 6. An opening groove measuring head is provided at the front end of the long key block 7. The opening groove measuring head can measure the width of the opening groove 12. The detection of the opening groove 12 is carried out by the sliding long key block 7. Before the workpiece is placed on the circular platform 2, the long key block 7 moves away from the circular platform 2. After the workpiece is placed on the circular platform 2, the long key block 7 slides into the opening groove 12 of the workpiece.

[0018] Since only the alignment of the center hole 10 and small hole 11 on the workpiece with the center hole measuring head 4 and small hole measuring head 3 needs to be considered, the positioning of the opening slot 12 on the workpiece does not need to be considered. This reduces one positioning reference, making the placement of the workpiece to be inspected faster and improving inspection efficiency. Specifically, the long key block 7 needs to inspect the setting angle and size of the opening slot 12 to ensure the accuracy of the inspection of the setting angle and size of the opening slot 12.

[0019] The central hole measuring head 4, the small hole measuring head 3, and the open slot measuring head of this utility model are all connected to a digital display. The digital display can display the dimensions measured by the measuring head, and if the measurement result is unqualified, it will also be displayed simultaneously, thereby further improving the convenience of inspection.

[0020] A limiting block is provided at the end of the slide rail 5 away from the circular platform 2. The limiting block can restrict the sliding position of the slider 6. When the slider 6 abuts against the limiting block, the end of the slotted measuring head is a certain distance away from the outer wall of the workpiece to be inspected, so as to avoid the slotted measuring head affecting the placement of the workpiece to be inspected.

[0021] The height of the long key block 7 is preferably higher than the height of the circular platform 2. Alternatively, an anti-interference opening groove 8 can be provided on the circular platform 2 at the position corresponding to the slide rail 5 of the base 1 to prevent the opening groove measuring head from colliding with the circular platform 2 when inspecting the workpiece. In addition, the anti-interference opening groove 8 also helps to guide the placement of the workpiece to be inspected. By aligning the position of the opening groove 12 with the position of the anti-interference opening groove 8 on the circular platform 2, it is more conducive to the rapid placement of the workpiece to be inspected.

[0022] The upper ends of the central hole measuring head 4 and the small hole measuring head 3 of this utility model are both designed as frustums. The frustum-shaped conical structure is beneficial for guiding and placing the workpiece.

[0023] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A measuring fixture for avoiding over-positioning keyways, characterized in that, Includes a base (1), on which a circular platform (2) is provided, and a central hole measuring head (4) is provided at the center of the circular platform (2), and several small hole measuring heads (3) are provided around the central hole measuring head (4). The position of the small hole measuring head (3) corresponds to the position of the small hole (11) on the workpiece to be inspected. The base (1) on the outer side of the circular platform (2) is provided with a slide rail (5), a slider (6) slides on the slide rail (5), a long key block (7) extending towards the circular platform (2) is provided on the slider (6), and an opening groove measuring head is provided at the front end of the long key block (7), which can measure the width of the opening groove (12). The central hole measuring head (4), the small hole measuring head (3), and the open slot measuring head are all connected to a digital display, which can display the dimensions measured by the measuring head.

2. The measuring fixture for avoiding over-positioning keyways according to claim 1, characterized in that, A limiting block is provided at one end of the slide rail (5) away from the circular platform (2), and the limiting block can restrict the sliding position of the slider (6).

3. The measuring fixture for avoiding over-positioning keyways according to claim 2, characterized in that, When the slider (6) abuts against the limiting block, the end of the opening groove measuring head is a certain distance from the outer wall of the workpiece to be tested.

4. The measuring fixture for avoiding over-positioning keyways according to claim 1, characterized in that, The height of the long key block (7) is higher than the height of the circular platform (2).

5. The measuring fixture for avoiding over-positioning keyways according to claim 1, characterized in that, The circular platform (2) is provided with an anti-interference opening groove (8) at the position of the slide rail (5) corresponding to the base (1).

6. The measuring fixture for avoiding over-positioning keyways according to claim 1, characterized in that, The upper ends of the central hole measuring head (4) and the small hole measuring head (3) are both truncated cones.

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