Cylindrical workpiece inner hole wall detection device

Abstract

The utility model relates to the technical field of workpiece detection, and discloses a cylindrical workpiece inner hole wall detection device, which comprises a detection camera, a support cylinder with a detection through hole, and a first reflector group, an annular light source and a second reflector group which are arranged in the detection through hole at intervals along a sequence far away from the detection camera, a lens of the detection camera directly faces the detection through hole; the light emitting direction of the annular light source is inclined relative to the center line of the detection through hole so as to illuminate the inner hole wall of the cylindrical workpiece; an inner hole wall image of the cylindrical workpiece is reflected to the first reflector group through the second reflector group, and the first reflector group reflects the inner hole wall image to the detection camera; and the annular light source does not shield a reflection path of the inner hole wall image. The device for detecting the inner hole wall of the cylindrical workpiece can reduce the detection work intensity, and facilitates the improvement of the detection precision and the detection efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece detection, in particular to a detection device for the inner hole wall of a cylindrical workpiece. Background Art

[0002] Detecting the inner hole wall of a cylindrical workpiece is to prevent cylindrical workpieces with defects such as protrusions, depressions, and cracks on the inner hole wall from flowing into subsequent production processes, thereby improving the production yield of products.

[0003] In the actual production process, inspection workers generally use the method of manual inspection to detect the inner hole of a cylindrical workpiece, that is, holding up the cylindrical workpiece so that both ends of the cylindrical workpiece are transparent, and the inspection worker is located at one end of the cylindrical workpiece. By means of the light at the other end orifice of the cylindrical workpiece, it is detected whether there are defects on the inner wall of the cylindrical workpiece. However, this detection method requires holding up the cylindrical workpiece, which increases the labor intensity of the inspection worker, and the detection accuracy is poor and it is not conducive to improving the detection efficiency.

[0004] In view of this, it is necessary to design a detection device for the inner hole wall of a cylindrical workpiece, which can reduce the detection work intensity and is conducive to improving the detection accuracy and detection efficiency.

[0005] The above information is given as background information only to assist in understanding the present disclosure, and it is not determined or admitted whether any of the above content can be used as the prior art relative to the present disclosure. Summary of the Utility Model

[0006] The utility model provides a detection device for the inner hole wall of a cylindrical workpiece, which can reduce the detection work intensity and is conducive to improving the detection accuracy and detection efficiency.

[0007] To achieve the above object, the utility model provides the following technical solutions:

[0008] A detection device for the inner hole wall of a cylindrical workpiece, comprising a detection camera, a support cylinder having a detection through hole, and a first mirror group, an annular light source, and a second mirror group sequentially arranged at intervals in the detection through hole along the direction away from the detection camera. The lens of the detection camera faces the detection through hole;

[0009] The light-emitting direction of the annular light source is inclined relative to the center line of the detection through hole to illuminate the inner hole wall of the cylindrical workpiece; the image of the inner hole wall of the cylindrical workpiece is reflected to the first mirror group by the second mirror group, and the first mirror group reflects the inner hole wall image to the detection camera;

[0010] The annular light source does not block the reflection path of the inner hole wall image.

[0011] Optionally, a first mounting portion is provided at one end of the support cylinder close to the detection camera, and one end of the first mirror group is mounted on the first mounting portion;

[0012] A second mounting portion is provided at one end of the support cylinder away from the detection camera, and the second mirror group is mounted on the second mounting portion.

[0013] Optionally, the distance between the detection camera and the support cylinder is adjustable;

[0014] The first mirror group includes first mirror pieces arranged in a circumferential array around the center line of the detection through-hole, and the second mirror group includes second mirror pieces arranged in a circumferential array around the center of the detection through-hole;

[0015] The inclination angles of the first mirror piece and the second mirror piece are both adjustable.

[0016] Optionally, the annular light source is slidably mounted on the inner wall of the detection through-hole, and the position of the annular light source is adjustable.

[0017] Optionally, the annular light source includes a support heat dissipation frame, a circuit board attached to the support heat dissipation frame, and lamp beads mounted on the circuit board.

[0018] Optionally, the top end of the first mirror piece is rotatably connected to the first mounting portion;

[0019] The first mirror group further includes a telescopic adjustment device. The body of the telescopic adjustment device is hinged to the support cylinder, and the other end is hinged to the first mirror piece, and the telescopic adjustment device is electrically connected to the detection camera.

[0020] Optionally, both the first mirror piece and the second mirror piece are total reflection mirror pieces.

[0021] Optionally, an absorbent layer is provided on the hole wall of the detection through-hole.

[0022] Optionally, the first mounting portion is rotatably connected to the top end of the support cylinder, and the second mounting portion is rotatably connected to the bottom end of the support cylinder.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The inner hole wall detection device for cylindrical workpieces provided by the present utility model uses an annular light source to obliquely illuminate the inner hole wall of the cylindrical workpiece, and the image of the inner hole wall is reflected by the first mirror group and the second mirror group and enters the detection camera, so that the detection camera can take pictures to detect the inner hole wall of the cylindrical workpiece; for the inner hole wall detection device of the cylindrical workpiece in this embodiment, on the one hand, it is not necessary to lift the cylindrical workpiece for detection, and on the other hand, through the ingenious structures of the first mirror group and the second mirror group, the photographing angle of the detection camera for the inner hole wall is effectively increased, which will be beneficial to improving the detection accuracy and detection efficiency.

[0025] The present utility model has other characteristics and advantages, which will be obvious from the accompanying drawings incorporated herein and the subsequent detailed description, or will be described in detail in the accompanying drawings incorporated herein and the subsequent detailed description, and these accompanying drawings and detailed description are used together to explain the specific principles of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model, and for those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 is a cross-sectional structural schematic diagram of the inner hole wall detection device for cylindrical workpieces provided by the embodiment of the present utility model;

[0028] Figure 2 is a partial sectional structural schematic diagram of the inner hole wall detection device for cylindrical workpieces provided by the embodiment of the present utility model.

[0029] Reference numerals: 1, detection camera; 2, support cylinder; 201, first mounting portion; 202, second mounting portion; 21, detection through hole; 3, first mirror group; 31, first mirror; 32, telescopic adjustment device; 4, annular light source; 5, second mirror group; 51, second mirror; 41, support heat dissipation frame; 42, circuit board; 43, lamp beads. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] In order to explain in detail the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects of the present application, the following will be described in detail in conjunction with the specific embodiments listed and the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, so they are only examples and cannot be used to limit the protection scope of the present application.

[0031] References to "embodiments" in this specification mean that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The term "embodiment" as it appears at various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit the independence or relevance between other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0032] Unless otherwise defined, the meanings of the technical terms used in this specification are the same as those commonly understood by those skilled in the technical field to which this application belongs; the use of the relevant terms in this specification is only for describing specific embodiments and is not intended to limit this application.

[0033] In the description of this application, the phrase "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships. For example, A and / or B means: the existence of A, the existence of B, and the simultaneous existence of A and B. In addition, the character " / " in this specification generally represents an "or" logical relationship between the associated objects before and after.

[0034] In this application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantitative, primary-secondary, or sequential relationships between these entities or operations.

[0035] s Without further limitation, in this application, the terms "comprise", "include", "have", or other similar expressions used in a statement are intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method, or product that includes the said elements, such that the process, method, or product that includes a series of elements may not only include those defined elements, but also include other elements not explicitly listed, or elements inherent to such process, method, or product.

[0036] Similar to the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding", etc. are understood not to include the recited number; expressions such as "above", "below", "within", etc. are understood to include the recited number. In addition, in the description of the embodiments of this application, the meaning of "a plurality of" is two or more (including two). Similar expressions related to "many", such as "multiple groups", "multiple times", etc., are also understood in this way, unless otherwise specifically defined.

[0037] In the description of the embodiments of the present application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the attached drawings. It is only for the convenience of describing the specific embodiments of the present application or for the reader's understanding, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0038] Unless otherwise clearly specified or limited, in the description of the embodiments of the present application, the terms such as "installed", "connected", "connected to", "fixed", "set", etc. should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art to which the present application pertains, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0039] In view of the defects existing in the above-mentioned existing methods for detecting the inner hole wall, based on the rich practical experience and professional knowledge in the design and manufacture of such products for many years by the applicant, and in cooperation with the application of theory, research and innovation have been actively carried out, hoping to create a technology that can solve the defects in the existing technology, making the inner hole wall detection device for cylindrical workpieces more practical. After continuous research, design, and repeated trial production of samples and improvement, the present utility model with practical value has finally been created.

[0040] Please refer to Figure 1 , an embodiment of the present utility model provides an inner hole wall detection device for a cylindrical workpiece, including a detection camera 1, a support cylinder 2 having a detection through hole 21, and a first mirror group 3, an annular light source 4, and a second mirror group 5 sequentially arranged at intervals in the detection through hole 21 along the direction away from the detection camera 1. The cross-section of the detection through hole 21 can be circular, rectangular or other shapes. The support cylinder 2 plays a supporting role and has the function of separating external stray light.

[0041] The lens of the detection camera 1 is directly opposite to the detection through hole 21; the light emitting direction of the annular light source 4 is inclined relative to the center line of the detection through hole 21 to illuminate the inner hole wall of the cylindrical workpiece; the image of the inner hole wall of the cylindrical workpiece is reflected by the second mirror group 5 to the first mirror group 3, and the first mirror group 3 reflects the inner hole wall image to the detection camera 1; the annular light source 4 does not block the reflection path of the inner hole wall image.

[0042] Specifically, the through-hole of the cylindrical workpiece is aligned with the detection through-hole 21, and the annular light source 4 emits light obliquely to illuminate the inner hole wall of the cylindrical workpiece. At this time, the second mirror group 5 closer to the cylindrical workpiece reflects the image of the inner hole wall of the cylindrical workpiece to the first mirror group 3, and the first mirror group 3 then reflects the inner hole wall image to the detection camera 1 for detection. The second mirror group 5 is closer to the inner hole of the cylindrical workpiece, enabling the image of the inner hole wall to be incident on the second mirror group 5 at a larger inclination angle, which is equivalent to a relatively larger photographing angle of the detection camera 1, making it easier to detect defects and improving the detection accuracy. It should be particularly noted that in the detection method of this embodiment, there is no need to lift the cylindrical workpiece, and the cylindrical workpiece can be detected in a flat state (for example, placed on a conveyor belt, and the inner hole of the cylindrical workpiece faces the detection device for the inner hole wall of the cylindrical workpiece), further improving the detection speed of the cylindrical workpiece.

[0043] In addition, another technical key point of this embodiment is to arrange the annular light source 4 between the first mirror group 3 and the second mirror group 5. On the one hand, this makes full use of the triangular annular space between the first mirror group 3 and the second mirror group 5, which is beneficial to further reducing the overall volume of the device, as Figure 1 shown; on the other hand, it can also provide a better lighting effect for the inner hole wall of the cylindrical workpiece.

[0044] Optionally, a first mounting portion 201 is provided at one end of the support cylinder 2 close to the detection camera 1, and one end of the first mirror group 3 is mounted on the first mounting portion 201; a second mounting portion 202 is provided at the end of the support cylinder 2 away from the detection camera 1, and the second mirror group 5 is mounted on the second mounting portion 202, which can make the installation of the first mirror group 3 and the second mirror group 5 more convenient.

[0045] Optionally, the distance between the detection camera 1 and the support cylinder 2 is adjustable, so that the image of the inner hole wall reflected by the second mirror group 5 can accurately enter the lens of the detection camera 1; the first mirror group 3 includes first mirror pieces 31 arranged in a circumferential array around the center line of the detection through-hole 21, and the second mirror group 5 includes second mirror pieces 51 arranged in a circumferential array around the center of the detection through-hole 21; the inclination angles of the first mirror pieces 31 and the second mirror pieces 51 are both adjustable, so as to match the detection requirements of cylindrical workpieces with different inner hole mirrors, making the applicable range of the detection device for the inner hole wall of the cylindrical workpiece larger; in addition, by adjusting the inclination angles of the first mirror pieces 31 and the second mirror pieces 51, it is also beneficial to more accurately detect the required inner hole wall image.

[0046] Optionally, the annular light source 4 is slidably mounted on the inner wall of the detection through-hole 21, and the position of the annular light source 4 is adjustable, so as to change the lighting effect and adapt to the detection requirements of cylindrical workpieces with different inner hole diameters.

[0047] Optionally, the annular light source 4 includes a support heat dissipation frame 41, a circuit board 42 attached to the support heat dissipation frame 41, and lamp beads 43 mounted on the circuit board 42.

[0048] Optionally, the top end of the first reflecting lens 31 is rotatably connected to the first mounting portion 201; the first reflecting mirror group 3 further includes a telescopic adjusting device 32. The body of the telescopic adjusting device 32 is hinged to the support cylinder 2, and the other end is hinged to the first reflecting lens 31, and the telescopic adjusting device 32 is electrically connected to the detection camera 1. Specifically, the telescopic adjusting device 32 controls the extending length of the telescopic shaft, so as to control the tilting angle of the first reflecting lens 31. It should also be added that each first reflecting lens 31 is correspondingly connected to a telescopic adjusting device 32.

[0049] Similarly, the tilting angle of the second reflecting lens 51 can also be controlled by an independent telescopic adjusting device 32.

[0050] Optionally, both the first reflecting lens 31 and the second reflecting lens 51 are total reflection lenses.

[0051] Optionally, an absorbing layer is provided on the inner wall of the detection through hole 21 to reduce the interference of diffused stray light and improve the imaging accuracy of the detection camera 1.

[0052] Optionally, the first mounting portion 201 is rotatably connected to the top end of the support cylinder 2, and the second mounting portion 202 is rotatably connected to the bottom end of the support cylinder 2. As Figure 2 shown, the first mounting portion 201 and the support cylinder 2 are rotatably connected through a damping rotating shaft structure.

[0053] The first mounting portion 201 is rotatably connected to the top end of the support cylinder 2, and the top end of the first reflecting lens 31 is rotatably connected to the first mounting portion 201, so that both the height and the tilting angle of the first reflecting lens 31 can be changed, thus better meeting the actual detection needs.

[0054] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of the present application, the patent protection scope of the present application cannot be limited thereby. Any technical solutions obtained by equivalent structure or equivalent process substitution or modification based on the essential concept of the present application and using the content recorded in the text and drawings of the specification of the present application, as well as those directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are all included in the patent protection scope of the present application.

Claims

1. A cylindrical workpiece inner hole wall detection device, characterized in that It includes a detection camera (1), a support cylinder (2) having a detection through-hole (21), and a first mirror group (3), an annular light source (4), and a second mirror group (5) that are sequentially arranged at intervals in the detection through-hole (21) along the direction away from the detection camera (1). The lens of the detection camera (1) faces the detection through-hole (21). The light-emitting direction of the annular light source (4) is inclined relative to the center line of the detection through-hole (21) to illuminate the inner hole wall of the cylindrical workpiece. The image of the inner hole wall of the cylindrical workpiece is reflected to the first mirror group (3) by the second mirror group (5), and the first mirror group (3) reflects the inner hole wall image to the detection camera (1). The annular light source (4) does not block the reflection path of the inner hole wall image.

2. The inner hole wall detection device for the cylindrical workpiece according to claim 1, characterized in that, A first mounting portion (201) is provided at one end of the support cylinder (2) close to the detection camera (1), and one end of the first mirror group (3) is mounted on the first mounting portion (201). A second mounting portion (202) is provided at one end of the support cylinder (2) away from the detection camera (1), and the second mirror group (5) is mounted on the second mounting portion (202).

3. The inner hole wall detection device for cylindrical workpieces according to claim 2, characterized in that, The distance between the detection camera (1) and the support cylinder (2) is adjustable. The first mirror group (3) includes first mirror lenses (31) arranged in a circumferential array around the center line of the detection through-hole (21), and the second mirror group (5) includes second mirror lenses (51) arranged in a circumferential array around the center of the detection through-hole (21). The inclination angles of the first mirror lenses (31) and the second mirror lenses (51) are both adjustable.

4. The inner hole wall detection device for a cylindrical workpiece according to claim 1, wherein, The annular light source (4) is slidably mounted on the inner wall of the detection through-hole (21), and the position of the annular light source (4) is adjustable.

5. The inner hole wall detection device for a cylindrical workpiece according to claim 1, characterized in that, The annular light source (4) includes a support heat dissipation frame (41), a circuit board (42) attached to the support heat dissipation frame (41), and lamp beads (43) mounted on the circuit board (42).

6. The inner hole wall detection device for a cylindrical workpiece according to claim 3, characterized in that The top end of the first mirror lens (31) is rotatably connected to the first mounting portion (201). The first mirror group (3) further includes a telescopic adjustment device (32). The body of the telescopic adjustment device (32) is hinged to the support cylinder (2), and the other end is hinged to the first mirror lens (31). The telescopic adjustment device (32) is electrically connected to the detection camera (1).

7. The inner hole wall detection device for a cylindrical workpiece according to claim 3, wherein, Both the first mirror lenses (31) and the second mirror lenses (51) are total reflection lenses.

8. The inner hole wall detection device for a cylindrical workpiece according to claim 1, wherein, An absorbing layer is provided on the hole wall of the detection through-hole (21).

9. The inner hole wall detection device for a cylindrical workpiece according to claim 6, wherein, The first mounting portion (201) is rotatably connected to the top end of the support cylinder (2), and the second mounting portion (202) is rotatably connected to the bottom end of the support cylinder (2).

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