Polishing auxiliary device and polishing equipment

Abstract

The utility model provides a grinding auxiliary device and grinding equipment, and the grinding auxiliary device comprises fixing equipment which is configured to be provided with a grinding machine; the explorator is detachably connected with the fixing equipment, and the explorator is configured to adjust the height of the machine head of the grinding machine; the limiting plate assembly is of a multi-stage annular plate structure; the radius of a large circle of the Nth stage is roughly the same as that of a small circle of the (N + 1) th stage, and each stage of annular plate is of a detachable structure; wherein N is an integer greater than or equal to 1. According to the grinding auxiliary device, by designing the limiting plate assembly of the multi-stage annular plate structure, the repairing and grinding area of the composite material can be accurately controlled. The height of the machine head of the grinding machine is adjusted through the explorator, and the repairing and grinding depth of the composite material can be accurately controlled. The number of the annular plates in the limiting plate assembly is adjusted, stepped grinding can be completed, and the repairing strength recovery rate and the performance stability are improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of composite material repair, and in particular to a grinding auxiliary device and a grinding equipment. Background Art

[0002] Manufacturing defects and damage during use of aviation composite structures are inevitable, affecting the structural integrity. In addition, the unique layered structural characteristics of composite materials determine that the step or taper size of the grinding area must be precisely controlled during the composite material repair and grinding process. There are strict requirements on the grinding depth and grinding area during the grinding process. If the grinding depth or the grinding area has large errors, it will have a great impact on the repair strength recovery rate and the performance will be unstable. In related technologies, the grinding process mainly relies on the feel of manual grinding and visual observation. This method of purely manual grinding is very demanding on the skills and feel of the grinders, and it is difficult to achieve the ideal grinding effect, which in turn affects the repair strength recovery rate and performance stability of the composite material structure. Summary of the invention

[0003] The purpose of the present disclosure is to provide a grinding auxiliary device and a grinding equipment, which can solve at least one of the technical problems mentioned above. The specific solution is as follows:

[0004] According to the specific embodiments of the present disclosure, on the one hand, the present disclosure provides a grinding auxiliary device, including: a fixing device, the fixing device is configured to assemble a grinder; a mold, the mold is detachably connected to the fixing device, and the mold is configured to adjust the height of the grinder head; a limit plate assembly, the limit plate assembly is a multi-stage annular plate structure; the radius of the large circle of the Nth stage is approximately the same as the radius of the small circle of the N+1th stage, and the annular plates of each stage are detachable structures; wherein N is an integer greater than or equal to 1.

[0005] In an optional embodiment, the difference between the large circle radius and the small circle radius of the multiple-stage annular plates is substantially the same.

[0006] In an optional embodiment, the large circle edge of the annular plate is provided with a first slope, the small circle edge of the annular plate is provided with a second slope matching the first slope, and the cross-section of the annular plate is substantially an isosceles trapezoid.

[0007] In an optional embodiment, a first limiting protrusion is provided at one end of the small circle edge of the annular plate close to the polishing surface; and a limiting groove matching the first limiting protrusion is provided at one end of the large circle edge of the annular plate away from the polishing surface.

[0008] In an optional embodiment, the fixing device is provided with a first through hole; a first fixing portion is provided at one end of the first through hole, and the first fixing portion is configured to fix the grinder.

[0009] In an optional embodiment, an outer wall at the other end of the first through hole is provided with an external thread, and one end of the master mold is provided with an internal thread.

[0010] In an optional embodiment, a dust outlet hole is provided on the side wall of the fixing device, and the dust outlet hole is connected to the first through hole.

[0011] In an optional embodiment, the mold is provided with a second through hole; when the mold is assembled on the fixing device, the first through hole is connected to the second through hole and has the same axial direction.

[0012] In an optional embodiment, the mold is provided with a second limiting protrusion away from the internal thread, the second limiting protrusion is an annular structure, and the inner ring of the annular structure is connected to the second through hole.

[0013] In an optional embodiment, the fixing device includes: a second fixing portion, and the second fixing portion is configured to fix the template.

[0014] In an optional embodiment, the second fixing portion is an L-shaped structure, one end of which is fixed to the outer wall of the fixing device, and the other end is provided with a third through hole; wherein the axial direction of the third through hole is substantially perpendicular to the axial direction of the first through hole.

[0015] According to a specific embodiment of the present disclosure, on the other hand, the present disclosure provides a grinding device, including: a grinder and a grinding auxiliary device as described in any one of the above technical solutions.

[0016] Compared with the prior art, the above solution of the embodiment of the present disclosure has at least the following beneficial effects:

[0017] The grinding auxiliary device disclosed in the present invention can accurately control the area of ​​composite material repair and grinding by designing a limit plate assembly with a multi-stage annular plate structure. The height of the grinding machine head is adjusted by the template, and the depth of composite material repair and grinding can be accurately controlled. By adjusting the number of the annular plates in the limit plate assembly, step-by-step grinding can be completed, thereby improving the strength recovery rate and performance stability of the repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An exploded view of a limiting plate assembly according to an embodiment of the present disclosure is shown.

[0019] Figure 2 A schematic structural diagram of a limit plate assembly according to an embodiment of the present disclosure is shown.

[0020] Figure 3 A schematic structural diagram of a fixing device according to an embodiment of the present disclosure is shown.

[0021] Figure 4A schematic structural diagram of a prototype according to an embodiment of the present disclosure is shown.

[0022] Figure 5 A schematic structural diagram of a prototype according to another embodiment of the present disclosure is shown.

[0023] Figure 6 A combined state diagram of a fixing device and a prototype according to an embodiment of the present disclosure is shown.

[0024] Figure 7 A combined state diagram of a fixing device and a prototype according to another embodiment of the present disclosure is shown.

[0025] Reference numerals:

[0026] 100: fixing device; 110: first through hole; 120: first fixing part; 130: second fixing part; 131: third through hole; 140: handle; 141: second mounting hole; 142: fixing hole; 150: first mounting hole; 160: dust outlet hole; 170: external thread;

[0027] 200: profiling; 210: first section; 211: internal thread; 220: second section; 230: third section; 231: second limiting protrusion; 240: second through hole; 250: air inlet; 260: hollowing;

[0028] 300: limit plate assembly; 310: annular plate. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0030] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the present disclosure. The singular forms "a", "said" and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0031] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0032] It should be understood that although the terms first, second, third, etc. may be used to describe structures in the disclosed embodiments, these structures should not be limited to these terms. These terms are only used to distinguish different structures. For example, without departing from the scope of the disclosed embodiments, a first component may also be referred to as a second component, and similarly, a second component may also be referred to as a first component.

[0033] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0034] In the related technology, aerospace composite materials will produce defects during the manufacturing process, and will be damaged during assembly and operation, affecting the structural integrity. In addition, the unique layered structural characteristics of composite materials determine that the step or taper size of the grinding area must be precisely controlled during the composite material repair and grinding process. During the grinding process, there are strict requirements on the grinding depth and grinding area. It is necessary to grind out a step shape, that is, the thickness of the remaining middle (damaged position) after grinding is small, and gradually thickens outward. This grinding method is very challenging for the skills and feel of the grinders. The grinding process mainly relies on the feel of manual grinding and naked eye observation. This method that relies purely on manual grinding is difficult to achieve ideal grinding effects.

[0035] In addition, in engineering construction, due to the long-term placement of steel components, their surfaces are rusted. In order to ensure quality, it is often necessary to polish the rusted components. The traditional polishing method is to place the components on the ground, and the operators manually polish the components with a handheld grinder. Due to the safety hazards of the above methods, the operating efficiency is too low, and it is difficult to polish all the rusted components clean, which seriously affects the component polishing efficiency and polishing quality, and also poses a safety hazard to the operators.

[0036] In order to solve at least one of the technical problems mentioned above, the present disclosure provides a grinding auxiliary device and a grinding equipment, the grinding auxiliary device comprising: a fixing device 100, the fixing device 100 is configured to assemble a grinder; a backing mold 200, the backing mold 200 is detachably connected to the fixing device 100, and the backing mold 200 is configured to adjust the height of the grinder head; a limit plate assembly 300, the limit plate assembly 300 is a multi-stage annular plate 310 structure; the radius of the large circle of the Nth stage is roughly the same as the radius of the small circle of the N+1th stage, and each level of the annular plate 310 is a detachable structure; wherein N is an integer greater than or equal to 1. Through the grinding auxiliary device disclosed in the present disclosure, the inaccurate removal of damage by grinding during the repair process, and the technical problems of low strength recovery rate and instability of performance of the composite material structure after repair can be solved. Through the grinding auxiliary device disclosed in the present disclosure, the limit plate assembly 300 is sequentially pasted on the surface of the structure to be repaired, and the small circle of the annular plate 310 of the first stage must completely envelop the damaged position. The grinder is assembled on the fixing device 100, and then the template 200 is assembled on the fixing device 100, and finally the grinding reference surface is determined, and the height of the machine head and the relative position of the template 200 are adjusted according to the thickness to be ground, and grinding is performed. Through the grinding auxiliary device disclosed in the present invention, step-by-step grinding can be completed, and the strength recovery rate and performance stability of the repair can be improved.

[0037] The optional embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0038] Figure 1 An exploded view of a limiting plate assembly according to an embodiment of the present disclosure is shown. Figure 2 FIG. 2 shows a schematic diagram of the structure of a limit plate assembly according to an embodiment of the present disclosure. Figure 1 and Figure 2 As shown, according to a specific embodiment of the present disclosure, on the one hand, a grinding auxiliary device is provided, comprising: a fixing device 100, the fixing device 100 is configured to assemble a grinding machine; a backing mold 200, the backing mold 200 is detachably connected to the fixing device 100, and the backing mold 200 is configured to adjust the height of the grinding machine head; a limit plate assembly 300, the limit plate assembly 300 is a multi-stage annular plate 310 structure; the radius of the large circle of the Nth stage is substantially the same as the radius of the small circle of the N+1th stage, and each level of the annular plate 310 is a detachable structure; wherein N is an integer greater than or equal to 1. The grinding auxiliary device of the present disclosure can accurately control the area of ​​composite material repair grinding by designing the limit plate assembly 300 of the multi-stage annular plate 310 structure. By adjusting the height of the grinding machine head by the backing mold 200, the depth of composite material repair grinding can be accurately controlled. By adjusting the number of the annular plates 310 in the limit plate assembly 300, step-type grinding can be completed, and the strength recovery rate and performance stability of the repair can be improved.

[0039] It should be noted that the limit plate assembly 300 is first pasted to the position that needs to be polished, so that all the damaged positions are located at the center of the limit plate assembly 300. By gradually removing one or more of the annular plates 310 from the inside to the outside, and adjusting the height of the grinder head through the mold 200, the area and depth error of the composite material repair polishing can be accurately controlled to improve the strength recovery rate and performance stability of the repair. In an optional embodiment, the thickness of the annular plate 310 is 2-3mm. In actual use, the limit plate assembly 300 is pasted on the surface of the structure to be repaired by gluing, and the small circle of the first-level annular plate 310 must completely envelop the damaged position. In actual use, the annular plate 310 can be adjusted to a rectangular or other shaped ring according to actual use requirements, not necessarily a circular ring.

[0040] In some embodiments, the difference between the large circle radius and the small circle radius of the multiple stages of the annular plates 310 is substantially the same.

[0041] In some embodiments, the large circle edge of the annular plate 310 is provided with a first slope, the small circle edge of the annular plate 310 is provided with a second slope matching the first slope, and the cross section of the annular plate 310 is substantially an isosceles trapezoid. In an optional embodiment, the small circle edge of the annular plate 310 is provided with a first limiting protrusion at one end close to the polishing surface; and the large circle edge of the annular plate 310 is provided with a limiting groove matching the first limiting protrusion at one end away from the polishing surface.

[0042] Figure 3 FIG. 2 shows a schematic diagram of the structure of a fixing device according to an embodiment of the present disclosure. Figure 3 As shown, in some embodiments, the fixing device 100 is provided with a first through hole 110; a first fixing portion 120 is provided at one end of the first through hole 110, and the first fixing portion 120 is configured to fix the grinder. In an optional embodiment, the first fixing portion 120 includes: a handle 140, the handle 140 is a U-shaped structure, a first mounting hole 150 is provided at one end of the fixing device 100 away from the external thread, and both ends of the handle 140 of the U-shaped structure are mounted on the first mounting hole 150. In an optional embodiment, second mounting holes 141 are provided at both ends of the handle 140 of the U-shaped structure, and the handle 140 is mounted on the fixing device 100 by passing a rotating shaft through the first mounting hole 150 and the second mounting hole 141, and the handle 140 can rotate around the rotating shaft. In an optional embodiment, a fixing hole 142 is opened on the web of the U-shaped structure, and a bolt or the like passes through the fixing hole 142. After the bolt is tightened, the end away from the nut tightly presses against the outer wall of the grinder, thereby achieving fixation.

[0043] In some embodiments, the outer wall of the other end of the first through hole 110 is provided with an external thread, and one end of the mold 200 is provided with an internal thread 211. By rotating the mold 200, the axial length (along the axial direction of the first through hole 110 and the second through hole 240) of the grinding auxiliary device of the present disclosure can be adjusted. The grinder is in the first through hole 110 and the second through hole 240, and the size of the grinder is fixed. When grinding, the second limiting protrusion 231 is close to the surface to be grinded. By adjusting the axial length of the grinding auxiliary device, the height of the head of the grinder protruding from the second limiting protrusion 231 is adjusted. Thereby adjusting the depth of grinding. In an optional embodiment, a dust outlet hole 160 is provided on the side wall of the fixing device 100, and the dust outlet hole 160 is connected to the first through hole 110. During the grinding process, the ground material will become dust. In the first through hole 110 and the second through hole 240, the present invention provides a dust outlet hole 160 on the side wall of the fixing device 100, so that an external dust suction device can be connected, and the dust suction pipe is placed in or passed through the dust outlet hole 160 to suck away the dust.

[0044] Figure 4 A schematic structural diagram of a prototype according to an embodiment of the present disclosure is shown. Figure 5 A schematic structural diagram of a prototype according to another embodiment of the present disclosure is shown. Figure 6 A combined state diagram of a fixing device and a prototype according to an embodiment of the present disclosure is shown. Figure 7 FIG. 2 shows a combined state diagram of a fixing device and a prototype according to another embodiment of the present disclosure. Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, in some embodiments, the master mold 200 is provided with a second through hole 240; when the master mold 200 is assembled on the fixing device 100, the first through hole 110 is connected with the second through hole 240 and has the same axial direction. In an optional embodiment, the master mold 200 is provided with a second limiting protrusion 231 away from the internal thread 211, and the second limiting protrusion 231 is an annular structure, and the inner ring of the annular structure is connected with the second through hole 240. The mold 200 is divided into three sections, and the second through hole 240 passes through the first section 210, the second section 220 and the third section 230 at the same time; the first section 210 is a hollow cylinder, and the inner wall of the first section 210 (that is, the inner wall of the second through hole 240) is provided with the internal thread 211, and the outer wall surface of the first section 210 is a frosted surface, which increases the friction and facilitates the fixation of the second fixing part 130; the second section 220 is a hollow disk, and the hollow part is the second through hole 240, and the thickness of the hollow disk is 1-3mm; the third section 230 is the second limiting protrusion 231, and the annular second limiting protrusion 231 is hollow as the second through hole 240. In an optional embodiment, the thickness of the second limiting protrusion 231 is the same as the thickness of the limiting plate assembly 300. During the grinding process, the side of the hollow disc away from the fixing device 100 is attached to the limiting plate assembly 300, thereby preventing (the fixing device 100, the backing mold 200 and the grinder) from tilting, thereby improving the grinding accuracy. In an optional embodiment, the hollow disc (second section) is provided with an air inlet 250, and the air inlet 250 is connected to the second through hole 240, and the air inlet 250 is configured to take in air during dust removal. In actual use, the second limiting protrusion 231 (i.e., the third section 230) is placed on the inner ring of the annular plate 310, and the grinding range is controlled by the second limiting protrusion 231 and the inner ring wall of the annular plate 310. In an optional embodiment, the second section 220 (the hollow disc) is provided with a hollow 260, and the hollow 260 is provided outside the outer wall of the second through hole 240; by providing the hollow 260, the weight of the entire template 200 is reduced, saving manpower. It should be noted that the second section 220 (the hollow disc) can be adjusted to a rectangular or other shape according to actual use requirements, and is not necessarily circular.

[0045] In some embodiments, the fixing device 100 includes: a second fixing portion 130, and the second fixing portion 130 is configured to fix the backing mold 200. In an optional embodiment, the second fixing portion 130 is an L-shaped structure, one end of which is fixed to the outer wall of the fixing device 100, and the other end is provided with a third through hole 131; wherein the axial direction of the third through hole 131 is substantially perpendicular to the axial direction of the first through hole 110. In an optional embodiment, the inner wall of the third through hole 131 is provided with a thread, and a bolt or the like passes through the third through hole 131. After tightening the bolt, the end away from the nut is tightly pressed against the outer wall of the backing mold 200, thereby fixing the backing mold 200.

[0046] According to a specific embodiment of the present disclosure, on the other hand, a grinding device is provided, including: a grinder and a grinding auxiliary device as described in any one of the above embodiments.

[0047] In some embodiments, the grinder is provided with scale lines from the head to the body, with the maximum grinding depth of the grinder being the scale 0. When the grinder and the template 200 are assembled with the fixing device 100, the grinding depth of the grinder can be read based on the plane where the second limiting protrusion 231 is away from the internal thread 211. By rotating the template 200 (the internal thread 211 of the template 200 and the external thread of the fixing device 100), the grinding depth can be precisely controlled. After the adjustment is completed, the second fixing part 130 is locked.

[0048] In some embodiments, the grinding surface of the grinding machine head is a conical surface (high in the middle and low around). In an optional embodiment, the inclination angle of the conical surface is 2-3°.

[0049] The present disclosure is intended to protect a grinding auxiliary device and a grinding equipment, the grinding auxiliary device comprising: a fixing device 100, the fixing device 100 is configured to assemble a grinding machine; a backing mold 200, the backing mold 200 is detachably connected to the fixing device 100, and the backing mold 200 is configured to adjust the height of the grinding machine head; a limit plate assembly 300, the limit plate assembly 300 is a multi-stage annular plate 310 structure; the radius of the large circle of the Nth stage is substantially the same as the radius of the small circle of the N+1th stage, and each stage of the annular plate 310 is a detachable structure; wherein N is an integer greater than or equal to 1. Through the grinding auxiliary device of the present disclosure, the limit plate assembly 300 is sequentially pasted on the surface of the structure to be repaired, and the small circle of the annular plate 310 of the first stage must completely envelop the damaged position. The grinder is assembled on the fixing device 100, and then the backing mold 200 is assembled on the fixing device 100. Finally, the grinding reference surface is determined, and the height of the machine head and the relative position of the backing mold 200 are adjusted according to the thickness of the grinding to be performed. The grinding auxiliary device disclosed in the present invention can complete step-by-step grinding, and improve the strength recovery rate and performance stability of the repair. First, the limit plate assembly 300 is pasted to the position that needs to be polished, so that all the damaged positions are located at the center position of the limit plate assembly 300. By gradually removing one or more of the annular plates 310 from the inside to the outside, and adjusting the height of the grinder head by the backing mold 200, the area and depth error of the composite material repair grinding can be accurately controlled, and the strength recovery rate and performance stability of the repair can be improved. The grinding auxiliary device disclosed in the present invention can accurately control the area of ​​the composite material repair grinding by designing the limit plate assembly 300 with a multi-stage annular plate 310 structure. By adjusting the height of the grinder head by the backing mold 200, the depth of the composite material repair grinding can be accurately controlled. By adjusting the number of the annular plates 310 in the limiting plate assembly 300, step-type grinding can be performed to improve the strength recovery rate and performance stability of the repair.

[0050] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the system or device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0051] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A grinding auxiliary device, characterized in that: include: a fixture configured to assemble a sanding machine; A template, the template is detachably connected to the fixing device, and the template is configured to adjust the height of the grinder head; A limit plate assembly, wherein the limit plate assembly is a multi-stage annular plate structure; the radius of the large circle of the Nth stage is substantially the same as the radius of the small circle of the N+1th stage, and the annular plates of each stage are detachable structures; Wherein, N is an integer greater than or equal to 1.

2. The grinding auxiliary device according to claim 1, characterized in that: The difference between the large circle radius and the small circle radius of the multi-stage annular plates is substantially the same.

3. The grinding auxiliary device according to claim 1, characterized in that: The fixing device is provided with a first through hole; A first fixing portion is disposed at one end of the first through hole, and the first fixing portion is configured to fix a grinder.

4. The grinding auxiliary device according to claim 3, characterized in that: The outer wall of the other end of the first through hole is provided with an external thread, and one end of the master mold is provided with an internal thread.

5. The grinding auxiliary device according to claim 3, characterized in that: A dust outlet hole is provided on the side wall of the fixing device, and the dust outlet hole is communicated with the first through hole.

6. The grinding auxiliary device according to claim 4, characterized in that: The master mold is provided with a second through hole; When the template is assembled on the fixing device, the first through hole is communicated with the second through hole and has the same axial direction.

7. The grinding auxiliary device according to claim 6, characterized in that: The mold is provided with a second limiting protrusion away from the internal thread, the second limiting protrusion is an annular structure, and the inner ring of the annular structure is connected to the second through hole.

8. The grinding auxiliary device according to claim 4, characterized in that: The fixed equipment includes: A second fixing portion, wherein the second fixing portion is configured to fix the master mold.

9. The grinding auxiliary device according to claim 8, characterized in that: The second fixing portion is an L-shaped structure, one end of which is fixed to the outer wall of the fixing device, and the other end of which is provided with a third through hole; The axial direction of the third through hole is substantially perpendicular to the axial direction of the first through hole.

10. A grinding device, characterized in that: include: A grinding machine and a grinding auxiliary device as claimed in any one of claims 1 to 9.

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