A small hole wall superfinishing device for small workpieces

Abstract

The application discloses a kind of small hole wall ultrafine light equipment for small workpiece, including a workbench, the table top of workbench is equipped with X direction transverse plate, X direction transverse plate is equipped with Y direction transverse plate, Y direction transverse plate is equipped with hollow rotating platform mounting plate by vertical lifting mechanism, hollow rotating platform mounting plate is equipped with hollow rotating platform, hollow rotating platform is equipped with workpiece clamp, and locking screw is equipped on the side wall of workpiece clamp;The table top of workbench located in the side of X direction transverse plate is equipped with guide roller support, and two pairs of guide roller groups are equipped on guide roller support, and one yarn is tensioned between two pairs of guide roller groups, yarn is sequentially threaded through workpiece clamp, hollow rotating platform and hollow rotating platform mounting plate, and tension measuring instrument is threaded on yarn.The application not only greatly reduces the skill requirement for operator, reduces labor intensity, but also improves polishing efficiency, improves product quality, effectively reduces the quantity of defective products.

Description

Technical Field

[0001] This invention belongs to the field of ultra-precision polishing technology for small hole walls, specifically relating to an ultra-precision polishing device for small hole walls of small workpieces. Background Technology

[0002] In the past, in processing such as Figure 1 When processing small workpieces with small holes, the traditional machining method typically includes three steps: drilling, reaming, and broaching. The broaching step is the polishing process for the small holes, which is further subdivided into rough broaching, semi-finish broaching, and finish broaching to ensure that the hole walls of the two through holes on the small workpiece achieve a surface finish of grade 10. Because... Figure 1 The small workpieces and their through holes shown are quite small, making it difficult to polish the small holes using honing or other mechanical polishing techniques. Therefore, currently, the small holes on these workpieces are polished manually using sandpaper of different grit sizes. However, the surface finish of the holes produced by this polishing method is directly related to the operator's skill, resulting in low polishing efficiency, unstable hole wall finish and roughness, and a tendency to produce poor quality. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an ultra-precision polishing device for the walls of small holes in small workpieces, thereby improving the polishing efficiency of the walls of small holes in small workpieces and achieving higher smoothness and roughness.

[0004] To solve the above-mentioned technical problems and achieve the above-mentioned technical effects, the present invention is implemented through the following technical solution:

[0005] An ultra-precision polishing device for the inner wall of small holes in small workpieces includes a worktable. An X-direction transverse plate is mounted on the worktable via corresponding slide rails. A Y-direction transverse plate is mounted on the X-direction transverse plate via corresponding slide rails. A hollow rotary platform mounting plate is mounted on the Y-direction transverse plate via a vertical lifting mechanism. A hollow rotary platform is mounted on the hollow rotary platform, and a workpiece clamp is mounted on the hollow rotary platform. Locking screws for fixing the workpiece within the workpiece clamp are provided on the side wall of the workpiece clamp. A guide wheel bracket is mounted on the worktable on one side of the X-direction transverse plate. Two pairs of guide wheels are mounted on the guide wheel bracket, and a yarn strip for polishing the inner wall of the small hole in the workpiece is tensioned between the two pairs of guide wheels. The yarn strip passes sequentially through the workpiece clamp, the hollow rotary platform, and the hollow rotary platform mounting plate, and a tension measuring instrument is threaded onto the yarn strip.

[0006] Furthermore, the workbench is equipped with an electrical control box for controlling the hollow rotating platform and the vertical lifting mechanism, and the electrical control box is connected to the tension measuring instrument via signal connection.

[0007] Furthermore, the workbench is equipped with control buttons, including switches, which are electrically connected to the electrical control box.

[0008] Furthermore, the X-direction lateral plate and the Y-direction lateral plate are laterally moved on their respective slide rails via the X-direction handwheel screw mechanism and the Y-direction handwheel screw mechanism, respectively.

[0009] Furthermore, the hollow rotary platform is a circular turntable driven by a corresponding rotary motor. The center of the circular turntable has a first through hole for placing the workpiece fixture and for the yarn to pass through. At the same time, the mounting plate of the hollow rotary platform has a first through hole for the yarn to pass through. The first through hole and the first through hole are concentric.

[0010] Furthermore, the workpiece fixture is a cylindrical fixture with a second through hole at its center for placing the workpiece and allowing the yarn to pass through. The locking screw is horizontally disposed on the side wall of the cylindrical fixture, and the tip of the locking screw is horizontally screwed into the second through hole. The locking screw uses its tip to press the workpiece against the second through hole of the workpiece fixture. When the workpiece fixture fixes the workpiece, the small hole to be polished on the workpiece is concentric with the first through hole of the hollow rotating platform.

[0011] Furthermore, an open bushing is provided in the second through hole of the workpiece fixture. After the workpiece is covered by the open bushing, it is placed in the second through hole of the workpiece fixture. When the locking screw is tightened, the open bushing is subjected to force, thereby wrapping the workpiece tightly around its circumference and fixing it in place, so as to avoid damaging the outer diameter of the workpiece.

[0012] Furthermore, the vertical lifting mechanism is a vertical reciprocating hydraulic mechanism, which consists of two electro-hydraulic rods and a support plate. The two electro-hydraulic rods are vertically arranged on the Y-direction transverse plate in a series or parallel manner. The bottoms of the two electro-hydraulic rods are fixedly connected to the upper surface of the Y-direction transverse plate, and the tops of the two electro-hydraulic rods are fixedly connected to the lower surface of the support plate. The support plate has a second through hole for the yarn to pass through, and the second through hole is concentric with the first through hole and the first through hole.

[0013] Furthermore, the guide wheel bracket consists of a support column, an upper support beam, and a lower support beam. The support column is fixedly connected to the table surface of the workbench. The upper support beam and the lower support beam are respectively fixed to the upper and lower parts of the support column. The upper support beam is located above the workpiece fixture, and the lower support beam is located below the hollow rotating platform mounting plate. One pair of the two pairs of guide wheel sets is arranged on the upper support beam, and the other pair is arranged on the lower support beam.

[0014] Furthermore, each pair of guide wheels includes an adjusting guide wheel and a transition guide wheel. The upper and lower transition guide wheels are located directly above and below the hollow rotating platform, respectively. The upper and lower adjusting guide wheels are located on one side of their respective pair of transition guide wheels. One end of the yarn is wound around the upper adjusting guide wheel, and the other end of the yarn is wound around the lower adjusting guide wheel after passing over the upper and lower transition guide wheels. The yarn forms a vertical yarn segment between the upper and lower transition guide wheels for polishing the inner wall of the small hole in the workpiece.

[0015] The beneficial effects of this invention are as follows:

[0016] This invention can replace manual polishing of the walls of small holes on small workpieces, which not only greatly reduces the skill requirements of operators and alleviates labor intensity, but also achieves a high degree of smoothness and roughness, eliminates the influence of human factors on product quality, improves polishing efficiency, enhances product quality, and effectively reduces the number of defective products.

[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of a small workpiece with holes that needs to be polished according to the present invention.

[0020] Figure 2 This is a three-dimensional view of the right side of the ultra-precision optical equipment for small holes in small workpieces according to the present invention;

[0021] Figure 3This is a three-dimensional view of the left side of the ultra-precision optical equipment for the hole wall of small workpieces according to the present invention.

[0022] The following are the labels in the diagram: 1. Workbench; 2. X-direction transverse plate; 3. Y-direction transverse plate; 4. Vertical lifting mechanism; 5. Hollow rotary platform; 6. Workpiece clamp; 7. Locking screw; 8. Guide wheel bracket; 9. Yarn; 10. Tension measuring instrument; 11. X-direction handwheel screw mechanism; 12. Y-direction handwheel screw mechanism; 13. Hollow rotary platform mounting plate; 14. Adjusting guide wheel; 15. Transition guide wheel; 16. Control button. Implementation

[0023] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to provide a clearer understanding of the invention's purpose, features, and advantages. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the invention, but are merely illustrative of the essential spirit of the invention's technical solution.

[0024] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0025] Unless the context requires otherwise, throughout the specification and claims, the word “comprising” and its variations, such as “including” and “having”, shall be understood to have an open, inclusive meaning, that is, to be interpreted as “including, but not limited to”.

[0026] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0027] The singular forms “a” and “the” used in this specification and the appended claims include plural references unless otherwise expressly stated herein. It should be noted that the term “or” is generally used to mean “and / or” unless otherwise expressly stated herein.

[0028] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] See Figure 2-3As shown, a device for ultra-precision finishing of small holes in small workpieces mainly includes a worktable (1), an X-direction transverse plate (2), a Y-direction transverse plate (3), a vertical lifting mechanism (4), a hollow rotating platform (5), a workpiece fixture (6), a locking screw (7), a guide wheel bracket (8), a guide wheel assembly, a yarn strip (9), and a tension measuring instrument (10).

[0030] Furthermore, the X-direction transverse plate (2) is mounted on the table surface of the workbench (1) via a corresponding slide rail, and the Y-direction transverse plate (3) is mounted on the X-direction transverse plate (2) via a corresponding slide rail.

[0031] In one embodiment of the present invention, the X-direction transverse plate (2) and the Y-direction transverse plate (3) are manually transversely adjusted on their respective corresponding slide rails by the X-direction handwheel screw mechanism (11) and the Y-direction handwheel screw mechanism (12), respectively.

[0032] In one embodiment of the present invention, the X-direction transverse plate (2) and the Y-direction transverse plate (3) are electrically laterally adjusted on their respective slide rails by the X-direction motor screw mechanism and the Y-direction motor screw mechanism, respectively.

[0033] In one embodiment of the present invention, the X-direction transverse plate (2) and the Y-direction transverse plate (3) are pneumatically laterally adjusted on their respective slide rails by X-direction cylinders and Y-direction cylinders, respectively.

[0034] Furthermore, the vertical lifting mechanism (4) is mounted on the Y-direction transverse plate (3), the hollow rotating platform (5) is mounted on the top of the vertical lifting mechanism (4) via the hollow rotating platform mounting plate (13), the workpiece clamp (6) is mounted on the hollow rotating platform (5), and the locking screw (7) is mounted on the side wall of the workpiece clamp (6).

[0035] In one embodiment of the present invention, the hollow rotary platform (5) is a circular turntable driven by a corresponding rotary motor. The center of the circular turntable has a first through hole for placing the workpiece fixture (6) and for the yarn (9) to pass through. At the same time, the mounting plate (13) of the hollow rotary platform has a first through hole for the yarn (9) to pass through. The first through hole and the first through hole are concentric. The rotational speed of the hollow rotary platform (5) is set to a low speed of 150 rpm.

[0036] Based on the above embodiments, the vertical lifting mechanism (4) is a vertical reciprocating hydraulic mechanism. The vertical reciprocating hydraulic mechanism consists of two electric hydraulic rods and a support plate. The two electric hydraulic rods are arranged vertically on the Y-direction transverse plate (3) in a series or parallel manner. The bottom of the two electric hydraulic rods is fixedly connected to the upper surface of the Y-direction transverse plate (3), and the top of the two electric hydraulic rods is fixedly connected to the lower surface of the support plate. The support plate is provided with a second through hole for the yarn (9) to pass through.

[0037] Based on the above embodiments, the workpiece clamp (6) is a cylindrical clamp. The center of the cylindrical clamp has a second through hole for placing the workpiece and allowing the yarn (9) to pass through. The locking screw (7) is horizontally arranged on the side wall of the cylindrical clamp. The tip of the locking screw (7) is horizontally screwed into the second through hole. An open bushing is provided in the second through hole of the workpiece clamp (6). After the workpiece is covered by the open bushing, it is placed in the second through hole of the workpiece clamp (6). When the locking screw (7) is tightened, the tip of the locking screw (7) presses against the open bushing. The open bushing is subjected to force, thereby wrapping the workpiece tightly around its circumference and fixing it to avoid damaging the outer diameter of the workpiece.

[0038] When the workpiece fixture (6) fixes the workpiece, it is necessary to ensure that the small hole to be polished on the workpiece, the first through hole of the hollow rotating platform (5), the first through hole on the hollow rotating platform mounting plate (13), and the second through hole on the pallet are concentric.

[0039] Furthermore, the guide wheel bracket (8) is set on the table surface of the workbench (1) located on one side of the X-direction transverse plate (2), and the guide wheel group is divided into upper and lower pairs and set on the guide wheel bracket (8).

[0040] In one embodiment of the present invention, the guide wheel bracket (8) is composed of a bracket column, an upper bracket beam and a lower bracket beam. The bracket column is fixedly connected to the table surface of the workbench (1). The upper bracket beam and the lower bracket beam are respectively fixed to the upper and lower parts of the bracket column. The upper bracket beam is located above the workpiece fixture (6), and the lower bracket beam is located below the hollow rotating platform mounting plate (13).

[0041] Based on the above embodiments, each pair of guide wheels includes an adjusting guide wheel (14) and a transition guide wheel (15). The upper and lower transition guide wheels (15) are located directly above and directly below the hollow rotating platform (5), respectively, and the upper and lower adjusting guide wheels (14) are located on one side of their respective pair of transition guide wheels (15).

[0042] Furthermore, the yarn (9) is tensioned between the two pairs of guide rollers. The yarn (9) passes through the small hole to be polished on the workpiece, the second through hole on the workpiece fixture (6), the first through hole of the hollow rotating platform (5), the first through hole of the hollow rotating platform mounting plate (13), and the second through hole of the support plate from top to bottom, for polishing the inner wall of the small hole of the workpiece. A tension measuring instrument (10) is also installed on the yarn (9).

[0043] In one embodiment of the present invention, one end of the yarn (9) is wound around the upper adjusting guide wheel (14), and the other end of the yarn (9) is wound around the lower adjusting guide wheel (14) after passing over the upper transition guide wheel (15) and the lower transition guide wheel (15). The yarn (9) forms a vertical yarn segment between the upper and lower transition guide wheels (15) for polishing the inner wall of the small hole of the workpiece. The vertical yarn segment passes through the small hole to be polished on the workpiece, the second through hole on the workpiece fixture (6), the first through hole of the hollow rotating platform (5), the first through hole of the hollow rotating platform mounting plate (13), and the second through hole of the support plate from top to bottom for polishing the inner wall of the small hole of the workpiece.

[0044] Based on the above embodiment, the two electro-hydraulic rods are arranged vertically on the Y-direction transverse plate (3) in a back-to-back manner. The support column is located on the left side of the X-direction transverse plate (2). The lower support beam extends to the right between the two electro-hydraulic rods and is suspended below the support plate. The upper support beam is suspended to the right above the workpiece fixture (6). The upper and lower transition guide wheels (15) are respectively located above the workpiece fixture (6), thereby making the upper and lower guide wheels... The vertical yarn segments between the transition guide wheels (15) can vertically pass through the small holes to be polished on the workpiece, the second through hole on the workpiece fixture (6), the first through hole of the hollow rotating platform (5), the first through hole of the hollow rotating platform mounting plate (13), and the second through hole of the support plate. The upper and lower adjusting guide wheels (14) are respectively located to the left of their respective transition guide wheels (15). The tension of the vertical yarn segments can be adjusted by rotating these two adjusting guide wheels (14). For the stroke adjustment of the two electric hydraulic rods, collisions between the workpiece and the upper and lower support beams should be avoided, and the motor on the side of the hollow rotating platform (5) should not touch the lower support beam.

[0045] In one embodiment of the present invention, the workbench (1) is provided with an electrical control box for controlling the hollow rotating platform (5) and the vertical lifting mechanism (4), and the electrical control box is connected to the tension measuring instrument (10) by signal; the workbench (1) is provided with a control button (16) including a switch, and the control button (16) is electrically connected to the electrical control box.

[0046] The working process of this invention is as follows:

[0047] See Figure 2-3 As shown, the workpiece to be polished is placed in the workpiece fixture (6), and the locking screw (7) is tightened to fix the workpiece in the workpiece fixture (6). After fixing, it is necessary to ensure that the small hole to be polished on the workpiece is concentric with the through hole on the hollow rotating platform (5). The upper end of the yarn (9) is wound around the upper adjusting guide wheel (14), and then the other end of the yarn (9) passes through the tension detector (15), the small hole to be polished on the workpiece, the through hole on the workpiece fixture (6), the through hole of the hollow rotating platform (5), the through hole of the hollow rotating platform mounting plate (13), and the through hole of the support plate in sequence. Finally, it passes around the lower transition guide wheel (15) and is wound around the lower adjusting guide wheel (14). By rotating the upper and lower adjusting guide wheels (14), the workpiece is polished. 4) Tension the yarn (9); crank the handwheel to move the X-direction transverse plate (2) and Y-direction transverse plate (3) back and forth and left and right, thereby causing the small hole wall of the workpiece to gradually contact the yarn (9) until the value displayed on the tension measuring instrument (10) reaches the set upper limit value; press the switch button in the control button (16), and the hollow rotating platform (5) starts to drive the workpiece fixture (6) and workpiece to rotate horizontally at a low speed of 150 rpm. At the same time, the vertical lifting mechanism (4) drives the hollow rotating platform (5), workpiece fixture (6) and workpiece to move up and down reciprocally, thereby polishing the small hole wall on the workpiece by the yarn (9); when the value displayed on the tension measuring instrument (10) reaches the set lower limit value, the machine tool automatically stops running and completes the ultra-fine polishing of the hole wall.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for ultra-precision finishing of the hole wall of small workpieces, characterized in that: The system includes a workbench (1), on which an X-direction transverse plate (2) is mounted via a corresponding slide rail. A Y-direction transverse plate (3) is mounted on the X-direction transverse plate (2) via a corresponding slide rail. A hollow rotary platform mounting plate (13) is mounted on the Y-direction transverse plate (3) via a vertical lifting mechanism (4). A hollow rotary platform (5) is mounted on the hollow rotary platform mounting plate (13). A workpiece clamp (6) is mounted on the hollow rotary platform (5). The side wall of the workpiece clamp (6) is provided with a tool for holding the workpiece. A locking screw (7) is fixed inside the workpiece fixture (6); a guide wheel bracket (8) is provided on the table surface of the worktable (1) located on one side of the X-direction transverse plate (2). The guide wheel bracket (8) is provided with two pairs of guide wheels, one upper and one lower. A yarn strip (9) for polishing the inner wall of the small hole of the workpiece is tensioned between the two pairs of guide wheels. The yarn strip (9) passes through the workpiece fixture (6), the hollow rotating platform (5) and the hollow rotating platform mounting plate (13) in sequence, and a tension measuring instrument (10) is threaded on the yarn strip (9). The hollow rotating platform (5) is a circular turntable driven by a corresponding rotating motor. The center of the circular turntable is provided with a first through hole for placing the workpiece fixture (6) and allowing the yarn (9) to pass through. At the same time, the hollow rotating platform mounting plate (13) is provided with a first through hole for allowing the yarn (9) to pass through. The first through hole and the first through hole are concentric. The workpiece clamp (6) is a cylindrical clamp with a second through hole at the center for placing the workpiece and allowing the yarn (9) to pass through. The locking screw (7) is horizontally arranged on the side wall of the cylindrical clamp, and the tip of the locking screw (7) is horizontally screwed into the second through hole. The locking screw (7) presses the workpiece against the second through hole of the workpiece clamp (6) through its tip. When the workpiece clamp (6) fixes the workpiece, the small hole to be polished on the workpiece is concentric with the first through hole of the hollow rotating platform (5). An open bushing is provided in the second through hole of the workpiece clamp (6). After the workpiece is covered by the open bushing, it is placed in the second through hole of the workpiece clamp (6). When the locking screw (7) is tightened, the open bushing is subjected to force, thereby wrapping the workpiece tightly around its circumference and fixing it to avoid damaging the outer diameter of the workpiece. The vertical lifting mechanism (4) is a vertical reciprocating hydraulic mechanism. The vertical reciprocating hydraulic mechanism consists of two electric hydraulic rods and a support plate. The two electric hydraulic rods are arranged vertically on the Y-direction transverse plate (3) in a series or parallel manner. The bottom of the two electric hydraulic rods is fixedly connected to the upper surface of the Y-direction transverse plate (3), and the top of the two electric hydraulic rods is fixedly connected to the lower surface of the support plate. The support plate is provided with a second through hole for the yarn (9) to pass through. The second through hole is concentric with the first through hole and the first through hole. The guide wheel bracket (8) is composed of a support column, an upper support beam and a lower support beam. The support column is fixedly connected to the table surface of the workbench (1). The upper support beam and the lower support beam are respectively fixed to the upper and lower parts of the support column. The upper support beam is located above the workpiece fixture (6), and the lower support beam is located below the hollow rotating platform mounting plate (13). One pair of the two pairs of guide wheel sets is set on the upper support beam, and the other pair is set on the lower support beam. Each pair of guide wheels includes an adjusting guide wheel (14) and a transition guide wheel (15). The upper and lower transition guide wheels (15) are located directly above and below the hollow rotating platform (5), respectively. The upper and lower adjusting guide wheels (14) are located on one side of their respective pair of transition guide wheels (15). One end of the yarn (9) is wound on the upper adjusting guide wheel (14), and the other end of the yarn (9) is wound on the lower adjusting guide wheel (14) after passing over the upper and lower transition guide wheels (15). The yarn (9) forms a vertical yarn segment between the upper and lower transition guide wheels (15) for polishing the inner wall of the small hole of the workpiece.

2. The ultra-precision finishing equipment for small holes in small workpieces according to claim 1, characterized in that: The workbench (1) is equipped with an electrical control box for controlling the hollow rotating platform (5) and the vertical lifting mechanism (4). The electrical control box is also connected to the tension measuring instrument (10).

3. The ultra-precision finishing equipment for small holes in small workpieces according to claim 2, characterized in that: The workbench (1) is equipped with control buttons (16), including switches, and the control buttons (16) are electrically connected to the electrical control box.

4. The ultra-precision finishing equipment for small holes in small workpieces according to claim 1, characterized in that: The X-direction transverse plate (2) and the Y-direction transverse plate (3) are transversely moved on their respective corresponding slide rails by the X-direction handwheel screw mechanism (11) and the Y-direction handwheel screw mechanism (12), respectively.

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