Adjustable boring cutter blade assembly structure and piston hole fine boring cutter

Abstract

The utility model relates to the technical field of machining cutters, in particular to an adjustable boring cutter blade assembly structure and a piston hole fine boring cutter, the assembly structure is characterized in that an assembly surface is axially arranged on the circumferential surface of the machining end of a cutter bar, a pressing plate is detachably connected to the assembly surface, and a blade is accommodated in an assembly space formed between the pressing plate and the assembly surface; a first through hole and a second through hole are formed in the machining end of the cutter bar, the first through hole and the pressing plate are coaxially arranged, a first adjusting piece is arranged in the first through hole and connected with the pressing plate, a second adjusting piece is arranged in the second through hole, and one end of the second adjusting piece abuts against the blade; the cutter bar and the blade are arranged to be of a detachable connection structure, so that the flexibility and applicability of blade assembly and adjustment are greatly improved; the assembly structure can be used for accurately adjusting the assembly and angle of the blade, so that the machining precision of the piston hole is ensured; the piston hole fine boring cutter can achieve the high-rotating-speed machining process, and the machining efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of machining tool technology, and in particular to an adjustable boring tool insert assembly structure and a piston hole precision boring tool. Background Technology

[0002] As the core component of a reciprocating compressor, the cylinder block's machining quality is related to the compressor's overall performance and service life. In particular, the machining of the piston bore requires extremely high precision, with a bore diameter tolerance of 8μm, a roundness requirement of 4μm, and a surface roughness requirement of Ra0.4 or less. The high precision machining requirements place demands on the machining tools, which must ensure stable and reliable performance parameters such as diameter, radial runout, and sharpness, thereby guaranteeing the machining accuracy of the piston bore.

[0003] In related technologies, multi-bladed reamers are commonly used to machine piston holes. However, they have the following significant drawbacks in actual use. First, the reamer experiences significant resistance during machining, which not only easily leads to distortion of the hole shape and out-of-roundness but also causes tool vibration, affecting machining stability. Second, the one-piece design of multi-bladed reamers makes it impossible to replace the inserts, and the fixed size makes it difficult to continue using the tool after wear, greatly increasing tool costs. In addition, multi-bladed reamers cannot adapt to high-speed machining and can only work at lower feed rates, which to some extent limits the improvement of machining efficiency.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background technology of this utility model, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an adjustable boring tool insert assembly structure and a piston hole precision boring tool to improve the flexibility and applicability of insert assembly and adjustment.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: an adjustable boring bar assembly structure and a piston hole precision boring tool, comprising:

[0007] The circumferential surface of the tool holder processing end is provided with an assembly surface along the axial direction. A pressure plate is detachably connected to the assembly surface, and the cutting blade is accommodated in the assembly space formed between the pressure plate and the assembly surface.

[0008] The tool holder has a first through hole and a second through hole in its processing end. The first through hole is coaxially arranged with the pressure plate, and a first adjusting member is provided in the first through hole. The first adjusting member is connected to the pressure plate. A second adjusting member is provided in the second through hole, and one end of the second adjusting member abuts against the blade.

[0009] Furthermore, the blade is recessed and inclined on one side toward the pressure plate to form a clamping surface, the pressure plate protrudes on one side toward the blade edge to form a pressing edge, and the side of the pressure plate toward the assembly surface abuts against the clamping surface.

[0010] Furthermore, the pressure plate is arranged through the first through hole to form a fixing hole, and one end of the first adjusting member is screwed to the fixing hole, and the other end is screwed to the first through hole.

[0011] Furthermore, the two end faces of the first adjusting member are recessed along the axial direction to form a first adjusting hole.

[0012] Furthermore, the second adjusting member includes a top contact portion and an adjusting portion coaxially arranged, the top contact portion abutting against the side of the blade away from the cutting edge, and the adjusting portion being screwed into the second through hole.

[0013] Furthermore, the blade has an inclined adjustment surface on the side facing away from the cutting edge, and the end face of the top contact portion facing away from the adjustment portion forms an inclined top contact surface with the outer side surface, and the adjustment surface and the top contact surface are fitted together.

[0014] Furthermore, the end face of the adjustment part opposite to the top contact part is recessed along the axial direction to form a second adjustment hole.

[0015] Furthermore, there are two second through holes, and a second adjusting member is fitted into each of the second through holes.

[0016] Furthermore, the two second through holes are arranged parallel to each other and symmetrically distributed on both sides of the pressure plate along the axis of the tool holder.

[0017] This utility model also provides a piston hole precision boring tool, including an adjustable boring tool insert assembly structure as described in any of the above claims, characterized in that it further includes a tool holder, the tool holder being assembled at the other end of the tool shank opposite to the insert, and the tool holder being coaxially arranged with the tool shank.

[0018] The beneficial effects of this utility model are as follows: By setting the tool holder and the cutting tool to a detachable connection structure, this utility model facilitates the replacement and adjustment of the cutting tool. When the cutting tool wears out, there is no need to replace the entire tool holder, reducing the cost of use and greatly improving the flexibility and applicability of cutting tool assembly and adjustment. Moreover, this assembly structure can precisely adjust the assembly and angle of the cutting tool, thereby meeting the high precision requirements of hole diameter tolerance, roundness, and roughness, ensuring the machining accuracy of the piston hole. In addition, this assembly structure makes the piston hole precision boring tool have low cutting resistance and high feed rate during the machining process, enabling high-speed machining, thereby greatly improving machining efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the adjustable boring bar assembly structure in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the blade structure in an embodiment of the present invention;

[0022] Figure 3 This is an assembly diagram of the first adjusting component in an embodiment of the present utility model;

[0023] Figure 4 This is an assembly diagram of the second adjusting member in an embodiment of the present utility model;

[0024] Figure 5 This is a schematic diagram of the piston hole precision boring tool in an embodiment of this utility model.

[0025] Reference numerals: 01, tool holder; 02, blade; 02a, clamping surface; 02b, adjusting surface; 03, tool shank; 1, assembly surface; 2, pressure plate; 2a, pressure edge; 2b, fixing hole; 3, first through hole; 4, second through hole; 5, first adjusting component; 5a, first adjusting hole; 6, second adjusting component; 61, top contact part; 61a, top contact surface; 62, adjusting part; 62a, second adjusting hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] like Figures 1 to 4 The adjustable boring bar assembly structure shown includes:

[0030] The circumferential surface of the tool holder 01 at the machining end is provided with an assembly surface 1 along the axial direction. A pressure plate 2 is detachably connected to the assembly surface 1, and the cutting tool 02 is accommodated in the assembly space formed between the pressure plate 2 and the assembly surface 1.

[0031] The tool holder 01 has a first through hole 3 and a second through hole 4 in its machining end. The first through hole 3 is coaxially arranged with the pressure plate 2, and a first adjusting member 5 is provided in the first through hole 3. The first adjusting member 5 is connected to the pressure plate 2. A second adjusting member 6 is provided in the second through hole 4, and one end of the second adjusting member 6 is abutted on the blade 02.

[0032] This invention features a detachable connection between the tool holder 01 and the insert 02, facilitating the replacement and adjustment of the insert 02. When the insert 02 wears, there is no need to replace the entire tool holder 01, reducing operating costs and significantly improving the flexibility and applicability of insert 02 assembly and adjustment. Furthermore, this assembly structure allows for precise adjustment of the insert 02's assembly and angle, meeting high-precision requirements such as bore diameter tolerance, roundness, and surface roughness, thus ensuring the machining accuracy of the piston bore. In addition, this assembly structure results in low cutting resistance and high feed rate during the precision boring of the piston bore, enabling high-speed machining and significantly improving machining efficiency.

[0033] Specifically, the assembly surface 1 at the machining end of the tool holder 01 serves as the mounting base for the insert 02 and the pressure plate 2, providing an accurate positioning reference surface. This facilitates stable installation and precise positioning of the insert 02 in the radial direction, reducing machining errors. The detachable pressure plate 2, in conjunction with the assembly surface 1, firmly presses the insert 02 into the assembly space, providing a fixing effect and preventing it from loosening during machining, ensuring cutting stability. Furthermore, the detachable connection allows for quick replacement and adjustment when the insert 02 wears or needs adjustment, improving tool maintenance and ease of use. Advantages: The first adjusting member 5 is connected to the pressure plate 2. By adjusting the first adjusting member 5, the pressure of the pressure plate 2 on the blade 02 can be easily adjusted, so as to achieve precise control of the clamping force of the blade 02 and avoid the blade 02 from loosening or deforming due to excessive or insufficient clamping force. The setting of the second through hole 4 allows the second adjusting member 6 to apply force to the blade 02 from inside the tool holder 01. By adjusting the second adjusting member 6, the position of the blade 02 in the radial direction can be precisely controlled, so as to achieve fine adjustment of the cutting depth and cutting angle of the blade 02, thereby ensuring that the dimensional accuracy of the piston hole machining meets the high precision requirements.

[0034] Based on the above embodiment, the blade 02 is recessed and inclined on one side facing the pressure plate 2 to form a clamping surface 02a, and the pressure plate 2 protrudes on one side facing the cutting edge of the blade 02 to form a pressure edge 2a. The side of the pressure plate 2 facing the assembly surface 1 abuts against the clamping surface 02a. The recessed and inclined clamping surface 02a increases the contact area between the blade 02 and the pressure plate 2, and the contact pressure distribution is more uniform, thereby improving the clamping stability of the blade 02 and reducing the vibration and loosening of the blade 02 during the cutting process. Moreover, the inclination angle of the clamping surface 02a can be matched with the pressure edge 2a of the pressure plate 2, which helps to accurately control the cutting position and angle of the blade 02, enhance the clamping effect of the blade 02, and improve the machining accuracy.

[0035] Based on the above embodiment, the pressure plate 2 is provided through the first through hole 3 to form a fixing hole 2b. One end of the first adjusting member 5 is screwed to the fixing hole 2b, and the other end is screwed to the first through hole 3. The structure in which one end of the first adjusting member 5 is screwed to the fixing hole 2b allows the first adjusting member 5 to firmly fix the pressure plate 2 on the tool holder 01, preventing the pressure plate 2 from loosening due to the cutting force during processing and ensuring the stable cutting of the blade 02. The structure in which the other end of the first adjusting member 5 is screwed to the first through hole 3 allows the first adjusting member 5 to be firmly fixed on the tool holder 01. At the same time, the position of the first adjusting member 5 can be easily adjusted through the threaded engagement, thereby achieving precise adjustment of the pressure of the pressure plate 2.

[0036] Based on the above embodiments, the two end faces of the first adjusting member 5 are recessed along the axial direction to form a first adjusting hole 5a; when using a tool to adjust the position of the first adjusting member 5 in the first through hole 3, the recessed first adjusting hole 5a provides a working position for the stable insertion or rotation of the tool, so as to apply a uniform force, thereby realizing a precise adjustment operation and avoiding adjustment errors caused by uneven adjustment force.

[0037] Based on the above embodiments, the second adjusting member 6 includes a top contact portion 61 and an adjusting portion 62 coaxially arranged. The top contact portion 61 abuts against the side of the blade 02 away from the cutting edge, and the adjusting portion 62 is screwed to the second through hole 4. The top contact portion 61 abuts against the blade 02 and controls its cutting depth by applying pressure to the blade 02. The top contact portion 61 and the adjusting portion 62 are coaxially arranged, which ensures that the force exerted by the top contact portion 61 on the blade 02 during the adjustment process is transmitted along the axial direction of the second through hole 4, thereby enabling precise control of the cutting position of the blade 02 and improving machining accuracy.

[0038] Based on the above embodiments, the side of the blade 02 facing away from the cutting edge is provided with an inclined adjustment surface 02b, and the end face of the top contact portion 61 facing away from the adjustment portion 62 forms an inclined top contact surface 61a between the outer side and the top contact surface. The adjustment surface 02b and the top contact surface 61a are fitted together. The inclined top contact surface 61a and the adjustment surface 02b of the blade 02 are fitted together, which can effectively transmit the pressure of the top contact portion 61 on the blade 02, and improve the positioning accuracy and stability of the blade 02. The inclination angle of the top contact surface 61a matches the inclination angle of the adjustment surface 02b. The top contact surface 61a slides relative to the adjustment surface 02b, changing the assembly depth of the blade 02, thereby adjusting the cutting depth of the blade 02 during the machining process.

[0039] The tilt angle of the adjustment surface 02b can be set according to actual machining requirements to adapt to different cutting depths and cutting force requirements, thereby improving the applicability of the insert 02 under various machining conditions.

[0040] Based on the above embodiment, the end face of the adjustment part 62 facing away from the top contact part 61 is recessed along the axial direction to form a second adjustment hole 62a. When the second adjustment member 6 is adjusted in the axial position of the second through hole 4 using a tool, the recessed second adjustment hole 62a provides a working position for the stable insertion or rotation of the tool, so as to apply a uniform force, thereby realizing the precise adjustment operation of the position of the top contact part 61 and avoiding adjustment errors caused by uneven adjustment force.

[0041] Based on the above embodiment, two second through holes 4 are provided, and a second adjusting member 6 is correspondingly assembled in each second through hole 4. The two second through holes 4 provide two independent adjustment channels, and each second adjusting member 6 can independently apply pressure to the insert 02, so that the pressure of different positions of the insert 02 can be adjusted separately. By adjusting the cooperation of the two second adjusting members 6, more precise control of cutting depth and cutting angle can be achieved, increasing the degree of freedom of tool adjustment, making the clamping and adjustment of the insert 02 more flexible, and better adapting to different processing needs.

[0042] Based on the above embodiment, the two second through holes 4 are arranged parallel to each other and symmetrically distributed on both sides of the pressure plate 2 along the axis of the tool holder 01. The parallel arrangement of the second through holes 4 ensures that the blade 02 is subjected to uniform and balanced force during the installation and adjustment of the two second adjusting members 6, reducing the tilting and swaying phenomenon of the blade 02 caused by uneven force during the cutting process, improving the machining accuracy. Furthermore, by adjusting the different positions of the two second adjusting members 6 in the second through holes 4, the cutting angle of the blade 02 can be adjusted, thereby improving the accuracy and stability of the adjustment.

[0043] like Figure 5 As shown, this utility model also provides a piston hole precision boring tool, including an adjustable boring tool insert 02 assembly structure as described in any of the above claims, characterized in that it further includes a tool holder 03, which is mounted on the other end of the tool holder 01 away from the insert 02, and the tool holder 03 and the tool holder 01 are coaxially arranged; the tool holder 03 provides stable support and connection for the tool, so that the tool can be firmly installed on the processing equipment and ensure the stability of the processing process.

[0044] When machining with the aforementioned piston bore precision boring tool, first place the insert 02 on the mounting surface 1 of the machining end of the tool holder 01, install the pressure plate 2 and align its fixing hole 2b with the first through hole 3. Screw one end of the first adjusting member 5 into the fixing hole 2b of the pressure plate 2 and the other end into the first through hole 3 of the tool holder 01. Rotate the first adjusting member 5 to apply appropriate pressure to the insert 02 by the pressure plate 2. At the same time, screw the adjusting parts 62 of the two second adjusting members 6 into the two symmetrically arranged second through holes 4, so that the top contact surface 61a of the top contact part 61 is in contact with the adjusting surface 02b of the insert 02. Rotate the adjusting part 62 to make a preliminary adjustment of the cutting depth of the insert 02. Before tightening the adjusting part 62, an appropriate amount of lubricant can be injected into the second adjusting hole 62a to reduce friction during subsequent adjustment and use.

[0045] The assembled precision boring tool is mounted onto the machining equipment via the tool holder 03. Based on the machining requirements of the piston hole and the equipment parameters, the position, angle, and cutting depth of the cutting tool 02 are precisely adjusted by rotating the first adjusting component 5 and the two second adjusting components 6 to ensure that the cutting tool 02 is in an accurate position during the machining process.

[0046] When the machining equipment is started, the tool holder 01 drives the insert 02 to rotate, and performs precision boring on the piston hole of the cylinder. During the machining process, the top joints 61 of the two second adjusting parts 6 provide stable support force for the insert 02, which works in conjunction with the clamping force of the pressure plate 2 to ensure stable cutting of the insert 02. The boring resistance is small, the roundness of the hole can reach below 0.002um, the speed can reach 8000rpm / min, and the feed is 800mm / min, ensuring machining efficiency and accuracy.

[0047] When the cutting tool 02 wears to a certain extent, it needs to be replaced. Loosen the first adjusting member 5 and the two second adjusting members 6, and remove the pressure plate 2 and the cutting tool 02. After replacing the cutting tool 02, reinstall the pressure plate 2 and tighten the first adjusting member 5 and the two second adjusting members 6 so that the pressure plate 2 applies appropriate pressure to the new cutting tool 02. The top contact surface 61a of the top contact part 61 and the adjusting surface 02b of the new cutting tool 02 are in contact with each other. The cutting depth of the cutting tool 02 is readjusted through the adjusting part 62, completing the tool maintenance and reassembly, and preparing for the next machining.

[0048] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An adjustable boring bar assembly structure, characterized in that, include: Tool holder and blade; The circumferential surface of the tool holder processing end is provided with an assembly surface along the axial direction. A pressure plate is detachably connected to the assembly surface, and the cutting blade is accommodated in the assembly space formed between the pressure plate and the assembly surface. The tool holder has a first through hole and a second through hole in its processing end. The first through hole is coaxially arranged with the pressure plate, and a first adjusting member is provided in the first through hole. The first adjusting member is connected to the pressure plate. A second adjusting member is provided in the second through hole, and one end of the second adjusting member abuts against the blade.

2. The adjustable boring bar assembly structure according to claim 1, characterized in that, The blade is recessed and inclined on one side toward the pressure plate to form a clamping surface, and the pressure plate protrudes on one side toward the blade edge to form a pressing edge. The side of the pressure plate toward the assembly surface abuts against the clamping surface.

3. The adjustable boring bar assembly structure according to claim 2, characterized in that, The pressure plate is provided through the first through hole to form a fixing hole. One end of the first adjusting member is screwed to the fixing hole, and the other end is screwed to the first through hole.

4. The adjustable boring bar assembly structure according to claim 3, characterized in that, The two end faces of the first adjusting member are recessed along the axial direction to form the first adjusting hole.

5. The adjustable boring bar assembly structure according to claim 1, characterized in that, The second adjusting member includes a top contact portion and an adjusting portion coaxially arranged. The top contact portion is disposed in contact with the side of the blade away from the cutting edge, and the adjusting portion is screwed into the second through hole.

6. The adjustable boring bar assembly structure according to claim 5, characterized in that, The blade has an inclined adjustment surface on one side away from the cutting edge, and the top contact portion forms an inclined top contact surface between the end face away from the adjustment portion and the outer side face, with the adjustment surface and the top contact surface fitting together.

7. The adjustable boring bar assembly structure according to claim 6, characterized in that, The adjustment part is recessed along the axial direction at the end face opposite to the top contact part to form a second adjustment hole.

8. The adjustable boring bar assembly structure according to claim 1, characterized in that, There are two second through holes, and a second adjusting component is installed in each of the second through holes.

9. The adjustable boring bar assembly structure according to claim 8, characterized in that, The two second through holes are arranged parallel to each other and symmetrically distributed on both sides of the pressure plate along the axis of the tool holder.

10. A piston bore precision boring tool, comprising the adjustable boring tool insert assembly structure as described in any one of claims 1 to 9, characterized in that, It also includes a handle, which is mounted on the other end of the shank opposite to the blade, and the handle is coaxial with the shank.

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