A tooling for qualitatively measuring the size and shape of small holes on the sidewalls deep within a part's hole.

Abstract

This utility model discloses a fixture for qualitatively measuring the size and shape of a small hole in the sidewall of a part's hole. The fixture targets a small hole connecting two pre-drilled holes. The part is fixed by a fixture on a base, and first and second endoscopic mechanisms, movable along the axis of the pre-drilled holes, are inserted through the open end to capture images. The two endoscopic mechanisms are connected to a display module, which has upper and lower tolerance contours for the small hole. Whether the measurement meets the tolerance is determined by observing whether the image falls within these contours. The fixture also includes a lighting device, a fixture with a positioning structure, a slide rail and limit blocks, a probe protective cover, and a buffer, ensuring convenient and accurate measurement.

Description

Technical Field

[0001] This solution relates to the field of tooling and fixtures, specifically to a tooling for qualitatively measuring the size and shape of small holes on the sidewalls deep within holes of parts. Background Technology

[0002] A certain gasoline pump body has two pre-drilled holes that are at least partially adjacent. Deep within the cavity of these pre-drilled holes, a small hole connecting the two adjacent holes is machined using ECM (Electrochemical Machining). During the machining process, it is necessary to check whether the shape and size of this small hole meet design requirements. However, because this small hole is located deep within the cavity of the pre-drilled hole, and the diameter of the pre-drilled hole itself is very small, conventional mechanical contact-based measuring devices are difficult to reach this location. Furthermore, the wall of the small hole is extremely thin; even if it is reached, a probe similar to a dial indicator cannot guarantee that it will be in contact precisely with the wall of the small hole, making the inspection of this hole very difficult. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a tooling for qualitatively measuring the size and shape of small holes on the side wall of a hole deep in a part.

[0004] The specific technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0005] A tooling for qualitatively measuring the size and shape of a small hole on the sidewall of a hole deep within a part, wherein the small hole is located on the sidewall of two pre-made holes that are at least partially adjacent and connect the two pre-made holes, both of which have open ends, the tooling includes a base, on which a part clamp is provided, and along the axial direction of the pre-made hole of the workpiece to be measured, a first endoscope mechanism and a second endoscope mechanism are respectively provided on the two pre-made hole axes of the part clamp, the first endoscope mechanism and the second endoscope mechanism can move along the axial direction of the corresponding pre-made hole, and the first endoscope mechanism and the second endoscope mechanism can enter the pre-made hole through the open end of the pre-made hole to reach the measurement position;

[0006] It also includes a display module, and both the first endoscope and the second endoscope are electrically connected to the display module. The display module is provided with a contour corresponding to the upper limit of the tolerance of the hole and a contour corresponding to the lower limit of the tolerance. By observing whether the image of the hole to be tested captured by the first endoscope and / or the second endoscope falls between the contour corresponding to the upper limit of the tolerance and the contour corresponding to the lower limit of the tolerance, it is determined whether the shape and size of the hole to be tested meet the standards.

[0007] Furthermore, the detection ends of the first and second endoscopes are also equipped with lighting devices.

[0008] Furthermore, the part fixture is provided with a V-shaped lifting part, a circumferential positioning part and an axial positioning part. The part to be tested is placed at the V-shaped lifting part, the circumferential positioning part constrains the circumferential rotation, and the axial positioning part constrains the axial position, ensuring the consistency of the position of each part to be tested on the part fixture.

[0009] Furthermore, both the first and second endoscopes are mounted on a slide rail and are also provided with an endoscope limit block. The first and second endoscopes can move along the slide rail, and when they touch the endoscope limit block, the first and second endoscopes are located at the detection position of the small hole to be tested inside the part to be tested.

[0010] Furthermore, protective covers are provided above the probes of the first and second endoscopes to prevent accidental damage to the probes from external forces.

[0011] Furthermore, the circumferential positioning part includes an outer circle constraint part and a positioning pin.

[0012] Furthermore, the axial positioning part consists of a reference plate where the positioning pin is located and an alignment plate hinged to the fixture body on the other side of the part to be measured.

[0013] Furthermore, a buffer is provided to reduce the impact force between the first endoscope and the second endoscope and the endoscope limit block. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the tooling structure for qualitatively measuring the size and shape of small holes on the sidewalls deep within the holes of a part, according to this utility model.

[0015] Figure 2 This is a schematic diagram of a tooling fixture for qualitatively measuring the size and shape of a small hole on the side wall of a hole deep within a part, according to the present invention.

[0016] Figure 3 This is a schematic diagram showing the location of the small hole in the part to be tested.

[0017] Figure 4 This is a schematic diagram of a display device.

[0018] The following is a list of component names represented by the reference numerals in the attached diagram:

[0019] 100. Part; 101. First pre-drilled hole; 102. Second pre-drilled hole; 103. Small hole;

[0020] 201. Base; 202. Part clamp; 203. First endoscope mechanism; 204. Second endoscope mechanism; 205. Display module; 206. Profile corresponding to the upper tolerance limit; 207. Profile corresponding to the lower tolerance limit; 208. V-shaped support; 209. Positioning pin; 210. Slide rail; 211. Endoscope mechanism limit block; 213. Alignment plate; 214. Buffer. Detailed Implementation

[0021] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0022] A tooling for qualitatively measuring the size and shape of small holes on the sidewalls deep within a part's hole, such as... Figure 3 As shown, the part to be tested 100 has two pre-drilled holes 101 and 102 that are at least partially adjacent. The small hole 103 is located on the sidewall of the two pre-drilled holes and connects the two pre-drilled holes. Both pre-drilled holes have open ends. Figure 1 As shown, the fixture includes a base 201, on which a part clamp 202 is mounted. Along the axis of the pre-drilled hole in the workpiece to be measured, a first endoscope 203 and a second endoscope 204 are respectively arranged on the axes of the two pre-drilled holes in the part clamp 202. The first endoscope 203 and the second endoscope 204 can move along the axis of the corresponding pre-drilled hole and can enter the interior of the pre-drilled hole through its open end to reach the measurement position.

[0023] It also includes a display module 205, and the first endoscope 203 and the second endoscope 204 are both electrically connected to the display module 205, such as Figure 4 As shown, the display module 205 has a contour 206 corresponding to the upper tolerance limit of the small hole 103 and a contour 207 corresponding to the lower tolerance limit. By observing whether the image of the small hole 103 to be tested captured by the first endoscope 203 and / or the second endoscope 204 is between the contours corresponding to the upper and lower tolerance limits, it is determined whether the shape and size of the small hole 103 to be tested meet the requirements.

[0024] The detection ends of the first endoscope 203 and the second endoscope 204 are also equipped with lighting devices.

[0025] like Figure 2 As shown, the part fixture 202 is provided with a V-shaped lifting part 208, a circumferential positioning part and an axial positioning part. The part to be tested 100 is placed at the V-shaped lifting part 208. Its circumferential rotation is restricted by the circumferential positioning part and its axial position is constrained by the axial positioning part, so as to ensure the consistency of the position of each part to be tested 100 on the part fixture 202.

[0026] The first endoscope 203 and the second endoscope 204 are both mounted on the slide rail 210, and an endoscope limiting block 211 is also provided. The first endoscope 203 and the second endoscope 204 can move along the slide rail 210. When they touch the endoscope limiting block 211, they are exactly at the detection position of the small hole 103 inside the part to be tested 100.

[0027] The probes of the first endoscope 203 and the second endoscope 204 are equipped with protective covers to prevent damage to the probes from accidental impacts.

[0028] The circumferential positioning part includes the outer circle constraint part and the positioning pin 209.

[0029] The axial positioning part consists of the reference plate where the positioning pin 209 is located and the alignment plate 213 located on the other side of the part to be measured 100 and hinged to the fixture body.

[0030] A buffer 214 is also provided to reduce the impact force between the first endoscope 203 and the second endoscope 204 and the endoscope limit block 211.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tooling for qualitatively measuring the size and shape of a small hole on the sidewall deep within a hole of a part, characterized in that, The small hole is located on the sidewall of two pre-made holes that are at least partially adjacent, and the small hole connects the two pre-made holes. Both pre-made holes have open ends. The tooling includes a base, and a part clamp is provided on the base. Along the axis of the pre-made hole of the workpiece to be measured, a first endoscope and a second endoscope are respectively provided on the axis of the two pre-made holes of the part clamp. The first endoscope and the second endoscope can move along the axis of the corresponding pre-made holes, and the first endoscope and the second endoscope can enter the pre-made holes through the open ends of the pre-made holes to reach the measurement position. It also includes a display module, and both the first endoscope and the second endoscope are electrically connected to the display module. The display module is provided with a contour corresponding to the upper limit of the tolerance of the hole and a contour corresponding to the lower limit of the tolerance. By observing whether the image of the hole to be tested captured by the first endoscope and / or the second endoscope falls between the contour corresponding to the upper limit of the tolerance and the contour corresponding to the lower limit of the tolerance, it is determined whether the shape and size of the hole to be tested meet the standards.

2. The tooling for qualitatively measuring the size and shape of small holes in the sidewall at the hole depth of a part according to claim 1, wherein The first and second endoscopic mechanisms are also equipped with lighting devices at their detection ends.

3. The tooling for qualitatively measuring the size and shape of small holes in the sidewall at a depth in a hole of a part according to claim 2, wherein, The part fixture is provided with a V-shaped lifting part, a circumferential positioning part and an axial positioning part. The part to be tested is placed at the V-shaped lifting part. The circumferential positioning part constrains the circumferential rotation, and the axial positioning part constrains the axial position, ensuring the consistency of the position of each part to be tested on the part fixture.

4. The tooling for qualitatively measuring the size and shape of a small hole in a side wall at a hole depth of a part according to any one of claims 1 to 3, characterized in that, Both the first and second endoscopes are mounted on a slide rail and are also provided with an endoscope limit block. The first and second endoscopes can move along the slide rail, and when they touch the endoscope limit block, the first and second endoscopes are located at the detection position of the small hole to be tested inside the part to be tested.

5. The tooling for qualitatively measuring the size and shape of small holes in the sidewall at the hole depth of a part according to any one of claims 1-3, characterized in that, The probes of the first and second endoscopes are equipped with protective covers to prevent accidental damage to the probes from external forces.

6. The tooling for qualitatively measuring the size and shape of small holes in the sidewall at a depth in a hole of a part according to claim 3, wherein, The circumferential positioning part includes an outer circular constraint part and a positioning pin.

7. The tooling for qualitatively measuring the size and shape of small holes on the sidewalls deep within a part's hole, as described in claim 2, is characterized in that... The axial positioning part consists of a reference plate where the positioning pin is located and an alignment plate hinged to the fixture body on the other side of the part to be measured.

8. The tooling for qualitatively measuring the size and shape of small holes in the sidewall at a depth in a hole of a part according to any one of claims 1-3, wherein, It is also equipped with a buffer to reduce the impact force between the first endoscope and the second endoscope and the endoscope limit block.

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