An apparatus and method for polishing and deburring internal keyways

Abstract

An internal keyway polishing and deburring device includes: a support cylinder with at least three positioning struts evenly arranged inside, rollers at the ends of the positioning struts, and a grinding component receiving groove on the outer side; a grinding component having a first grinding block and a second grinding block, fitted into the grinding component receiving groove, and further mounted on the support cylinder by a locking element; a pressure elastic element, radially spaced between the first and second grinding blocks, and abutting against the support cylinder; and a thrust elastic element, transversely arranged between the first and second grinding blocks along the width direction between the sidewalls of the internal keyway. This invention, by adjusting the positioning struts, ensures that the support cylinder is concentric with the tube to be processed, enabling the device to move along straight and curved keyways to meet the polishing and deburring needs of different internal keyways. It also has particular advantages for internal keyways with large depth-to-diameter ratios, multiple channels, ultra-long holes, and spiral tubes, making it widely applicable.

Description

Technical Field

[0001] This invention relates to the field of precision machining technology, and in particular to a device and method for polishing and deburring internal keyways. Background Technology

[0002] The keyways most commonly encountered are single keyways used for shaft connections. In mechanical connections, the size and surface finish requirements for single keyways are not high. Splines with multiple keyways are usually achieved using ordinary machining techniques. For small-sized multi-keyway structures, to improve their surface finish, manual, mechanical, electrolytic, and electrolytic plasma processing techniques are all viable options for polishing and deburring.

[0003] However, there are currently no suitable processing devices and processes for polishing and deburring keyways in tubes with large aspect ratios, multiple channels, ultra-long holes, and spiral tubes. As is well known, the male side of the keyway can be finished by honing, but the treatment of the sidewalls and male side remains a challenge for those skilled in the art. In addition, electrolysis and electrolytic plasma methods have many technical bottlenecks in the treatment of the sidewalls and male side, involving not only environmental protection, processing costs, and safety issues, but also making it difficult to guarantee product yield and resulting in significant uncertainties in processing dimensions and surface finish.

[0004] Therefore, in response to the problems existing in the prior art, this design actively researches and improves, resulting in the present invention of an internal hole keyway polishing and deburring device and method. Summary of the Invention

[0005] The first objective of this invention is to address the shortcomings of existing technologies, such as the polishing and deburring methods for keyways in pipes with large aspect ratios, multiple channels, ultra-long holes, and spiral tubes, which not only involve environmental protection, processing costs, and safety issues, but also make it difficult to guarantee product yield and have large uncertainties in processing dimensions and surface finish, by providing an internal keyway polishing and deburring device.

[0006] The second objective of this invention is to address the shortcomings of existing technologies, such as the polishing and deburring methods for keyways in pipes with large aspect ratios, multiple channels, ultra-long holes, and spiral tubes, which not only involve environmental protection, processing costs, and safety issues, but also have difficulties in guaranteeing product yield and have large uncertainties in processing dimensions and surface finish. This invention provides a method for polishing and deburring keyways in internal holes.

[0007] To achieve the first objective of this invention, this invention provides an internal keyway polishing and deburring device, the internal keyway polishing and deburring device comprising:

[0008] The bearing cylinder has at least three positioning support rods evenly arranged inside it. Rollers are respectively provided on the ends of the positioning support rods that protrude from the bearing cylinder. Grinding component receiving grooves are provided at intervals on the outer side of the bearing cylinder. The rollers move along the grooves inside the bore tube under the action of external force.

[0009] The grinding assembly has a first grinding block and a second grinding block with mutually matched structures, and the grinding assembly is fitted into the grinding assembly receiving groove of the bearing cylinder. The grinding assembly is further floatingly mounted on the bearing cylinder by a locking element.

[0010] A pressure elastic element is arranged radially between the first grinding block and the second grinding block and abuts against the bearing cylinder to provide a preset contact force for grinding the grinding assembly and the inner hole keyway surface of the groove to be processed.

[0011] A thrust elastic element is disposed laterally between the first grinding block and the second grinding block along the width direction between the side walls of the inner hole keyway, providing a preset contact force to the grinding assembly and the side surface of the inner hole keyway.

[0012] Optionally, the internal keyway is at least one of the following forms: large aspect ratio, multiple channels, ultra-long hole, or spiral tube.

[0013] Optionally, the number of positioning struts is determined according to the number of channels in the bore.

[0014] Optionally, the pressure elastic element is a spring or a sheet.

[0015] Optionally, the thrust elastic element is a spring or a sheet.

[0016] To achieve the second objective of this invention, the present invention provides a method for polishing and deburring using the aforementioned internal keyway polishing and deburring device. The method includes:

[0017] Execute step S1: Synchronously adjust the positioning support rod radially so that the bearing cylinder is concentric with the groove tube to be processed;

[0018] Step S2: A pressure elastic element and a thrust elastic element are provided between the first grinding block and the second grinding block whose structures are matched with each other in the grinding assembly, and further fitted into the grinding assembly receiving groove of the bearing cylinder;

[0019] Execute step S3: Floatally mount the grinding assembly onto the support cylinder using locking elements;

[0020] Perform step S4: Apply diamond powder to the contact surface between the grinding assembly and the inner keyway;

[0021] Step S5: The bearing cylinder moves along the axis of the groove to be processed under the action of external force, and drives the grinding component fixed on the bearing cylinder to move in the same direction. The grinding component moves relative to the inner hole keyway, thereby achieving polishing and deburring.

[0022] Optionally, the rollers cooperate with the grooves inside the bore to enable the bearing cylinder to move and rotate along the direction of the keyway in the inner hole.

[0023] Optionally, the pressure elastic elements are arranged radially between the first grinding block and the second grinding block and abut against the support cylinder. The grinding assembly is slightly separated radially from the support cylinder under the action of elastic force, so as to ensure that after the grinding assembly enters the inner hole keyway, the top surface of the grinding assembly is in close contact with the inner hole keyway's negative surface, and friction is generated under the drive of the support cylinder to achieve polishing and deburring.

[0024] Optionally, the thrust elastic element is arranged laterally along the width direction between the sidewalls of the inner keyway and between the first grinding block and the second grinding block, providing a preset contact force to the grinding assembly and the side surface of the inner keyway, and generating friction during relative movement to achieve polishing and deburring of the negative line surface and the side surface.

[0025] In summary, the internal keyway polishing and deburring device of the present invention, by adjusting the positioning support rod with rollers, ensures that the supporting cylinder and the groove tube to be processed are concentric. It can not only move the internal keyway polishing and deburring device along straight and curved keyways to achieve polishing and deburring of different internal keyways, but also has particular advantages for internal keyways with large depth-to-diameter ratios, multiple channels, ultra-long holes, and spiral tubes. It has a wide range of applications and is worthy of promotion and use in the industry. Attached Figure Description

[0026] Figure 1 The figure shown is a perspective view of the internal keyway polishing and deburring device of the present invention.

[0027] Figure 2 The image shown is a front view of the internal keyway polishing and deburring device of the present invention.

[0028] Figure 3 The image shown is a side view of the internal keyway polishing and deburring device of the present invention.

[0029] Figure 4 The figure shown is an assembly diagram of the grinding component of the inner hole keyway polishing and deburring device of the present invention.

[0030] Figure 5 The figure shown is an assembly diagram of the inner hole keyway polishing and deburring device of the present invention and the grooved tube to be processed.

[0031] Figure 6 The diagram shows a process flow chart for polishing and deburring the keyway in an internal hole. Detailed Implementation

[0032] To explain in detail the technical content, structural features, objectives, and effects of this invention, the following will provide a detailed description in conjunction with embodiments and accompanying drawings.

[0033] Please see Figures 1-5 , Figure 1 The figure shown is a perspective view of the internal keyway polishing and deburring device of the present invention. Figure 2 The image shown is a front view of the internal keyway polishing and deburring device of the present invention. Figure 3 The image shown is a side view of the internal keyway polishing and deburring device of the present invention. Figure 4 The figure shown is an assembly diagram of the grinding component of the internal keyway polishing and deburring device of the present invention. Figure 5 The diagram shows the assembly of the internal keyway polishing and deburring device of the present invention with the grooved tube to be processed. The internal keyway polishing and deburring device includes:

[0034] The bearing cylinder 1 has at least three positioning support rods 2 evenly arranged inside it. Rollers 3 are respectively provided on the end of the positioning support rods 2 that protrude from the bearing cylinder 1. Grinding component receiving grooves 4 are provided at intervals on the outside of the bearing cylinder 1. The rollers 3 move along the grooves inside the bore tube (not shown) under the action of external force.

[0035] The grinding component 5 has a first grinding block 51 and a second grinding block 52 that are structurally matched, and the grinding component 5 is fitted into the grinding component receiving groove 4 of the bearing cylinder 1. The grinding component 5 is further floatingly mounted on the bearing cylinder 1 by a locking element 6.

[0036] The pressure elastic element 7 is arranged radially between the first grinding block 51 and the second grinding block 52 and abuts against the bearing cylinder 1, providing a preset contact force for grinding the inner hole keyway 81 of the grinding assembly 5 and the inner hole keyway 81 of the groove tube to be processed.

[0037] The thrust elastic element 9 and the thrust elastic element 8 are arranged laterally along the width direction between the side walls of the inner hole keyway 81 and the first grinding block 51 and the second grinding block 52, providing a preset contact force to the grinding assembly 5 and the side surface of the inner hole keyway 81.

[0038] In a preferred embodiment, the number of positioning support rods 2 is determined by the number of channels within the bore. The positioning support rods 2 can be adjusted radially to ensure that the supporting cylinder 1 is concentric with the grooved tube 8 to be processed. The rollers 3 cooperate with the channels within the bore to enable the supporting cylinder 1 to travel and rotate along the direction of the inner keyway 81. The pressure elastic element 7 is a spring or a spring sheet. The thrust elastic element 9 is a spring or a spring sheet.

[0039] To more intuitively reveal the technical solution of the present invention and highlight its beneficial effects, the working principle of the internal keyway polishing and deburring device and polishing and deburring method is now described in conjunction with specific embodiments. In the specific embodiments, the number of positioning support rods, the shape of the internal keyway, and the specific forms in which the first and second grinding blocks of the grinding assembly are matched are merely examples and should not be regarded as limitations on the technical solution of the present invention.

[0040] Please see Figure 6 and in conjunction with reference Figures 1-5 , Figure 6 The diagram shows a process flow chart for polishing and deburring using the internal keyway polishing and deburring device of the present invention. The method for polishing and deburring using the aforementioned internal keyway polishing and deburring device includes:

[0041] Execution step S1: Synchronously adjust the positioning support rod 2 radially so that the bearing cylinder 1 is concentric with the groove tube 8 to be processed;

[0042] Step S2: A pressure elastic element 7 and a thrust elastic element 9 are provided between the first grinding block 51 and the second grinding block 52, which are structurally matched with each other in the grinding assembly 5, and are further fitted into the grinding assembly receiving groove 4 of the bearing cylinder 1.

[0043] Execute step S3: Float the grinding assembly 5 on the bearing cylinder 1 via the locking element 6;

[0044] Step S4: Apply diamond powder to the contact surface between the grinding assembly 5 and the inner keyway 81;

[0045] Step S5: The bearing cylinder 1 moves along the axis of the groove tube 8 to be processed under the action of external force, and drives the grinding component 5 fixed on the bearing cylinder 1 to move in the same direction. The grinding component 5 moves relative to the inner hole keyway 81, thereby achieving polishing and deburring.

[0046] As will be readily understood by those skilled in the art, the pressure elastic element 7 is arranged radially between the first grinding block 51 and the second grinding block 52 and abuts against the bearing cylinder 1. The grinding assembly 5 is slightly separated radially from the bearing cylinder 1 under the action of elastic force, so as to ensure that after the grinding assembly 5 enters the inner hole keyway 81, the top surface of the grinding assembly 5 is in close contact with the negative surface of the inner hole keyway 81, and friction is generated under the drive of the bearing cylinder 1 to achieve polishing and deburring.

[0047] Meanwhile, the thrust elastic element 9 is arranged laterally between the first grinding block 51 and the second grinding block 52 along the width direction between the side walls of the inner hole keyway 81, providing a preset contact force to the grinding assembly 5 and the side surface of the inner hole keyway 81, and generating friction during relative movement to achieve polishing and deburring of the negative line surface and the side surface.

[0048] Obviously, in this invention, the internal keyway 81 includes, but is not limited to, internal keyway forms with large aspect ratios, multiple channels, extra-long holes, and spiral tubes. The supporting cylinder 1 can move within the channel of the bore tube along the extension direction of the internal keyway 81, simultaneously achieving movement and rotation.

[0049] In summary, the internal keyway polishing and deburring device of the present invention, by adjusting the positioning support rod with rollers, ensures that the supporting cylinder and the groove tube to be processed are concentric. It can not only move the internal keyway polishing and deburring device along straight and curved keyways to achieve polishing and deburring of different internal keyways, but also has particular advantages for internal keyways with large depth-to-diameter ratios, multiple channels, ultra-long holes, and spiral tubes. It has a wide range of applications and is worthy of promotion and use in the industry.

[0050] Those skilled in the art will understand that various modifications and variations can be made to this invention without departing from its spirit or scope. Therefore, if any modification or variation falls within the scope of the appended claims and their equivalents, the invention is considered to cover such modifications and variations.

Claims

1. A method of polishing and deburring using an inner hole key groove polishing and deburring device, characterized by, The internal keyway polishing and deburring device includes: The support cylinder has at least three positioning support rods evenly arranged inside. Rollers are respectively provided at the ends of the positioning support rods that protrude from the support cylinder. Grinding component receiving grooves are provided at intervals on the outer side of the support cylinder. The rollers move along the groove in the tube to be processed under the action of external force, so that the support cylinder can move and rotate along the direction of the inner hole keyway. The grinding assembly has a first grinding block and a second grinding block with mutually matched structures, and the grinding assembly is fitted into the grinding assembly receiving groove of the bearing cylinder. The grinding assembly is further floatingly mounted on the bearing cylinder by a locking element. A pressure elastic element is arranged radially at intervals between the first grinding block and the second grinding block, and abuts against the bearing cylinder to provide a preset contact force for grinding the grinding assembly and the inner hole keyway surface of the groove to be processed. A thrust elastic element is laterally disposed between the first grinding block and the second grinding block along the width direction between the side walls of the inner hole keyway, providing a preset contact force to the grinding assembly and the side surface of the inner hole keyway; The method includes: Execute step S1: Synchronously adjust the positioning support rod radially so that the bearing cylinder is concentric with the groove tube to be processed; Step S2: A pressure elastic element and a thrust elastic element are provided between the first grinding block and the second grinding block whose structures are matched with each other in the grinding assembly, and further fitted into the grinding assembly receiving groove of the bearing cylinder; Execute step S3: Floatally mount the grinding assembly onto the support cylinder using locking elements; Perform step S4: Apply diamond powder to the contact surface between the grinding assembly and the inner keyway; Step S5: The bearing cylinder moves along the axis of the groove to be processed under the action of external force, and drives the grinding component set on the bearing cylinder to move in the same direction. The grinding component moves relative to the inner hole keyway, thereby achieving polishing and deburring.

2. The method of claim 1, wherein the polishing and deburring is performed using the inner hole key groove polishing and deburring device. The internal keyway is at least one of the following forms: large depth-to-diameter ratio, multi-channel, ultra-long hole, or spiral tube.

3. The method of claim 1, wherein the polishing and deburring is performed using the inner hole key groove polishing and deburring device. The number of positioning support rods is determined by the number of channels in the groove tube to be processed.

4. The method for polishing and deburring using an internal keyway polishing and deburring device as described in claim 1, characterized in that, The pressure elastic element is a spring or a sheet.

5. The method for polishing and deburring using an internal keyway polishing and deburring device as described in claim 1, characterized in that, The thrust elastic element is a spring or a sheet.

6. The method for polishing and deburring using an internal keyway polishing and deburring device as described in claim 1, characterized in that, The roller engages with the channel inside the tube to be processed.

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