A boring device for machining the inner wall of a cylinder.

Abstract

This invention provides a boring device for machining the inner wall of a cylinder, belonging to the field of boring machining technology. The device includes a tool holder with a mounting groove. A mounting block that slides radially along the tool holder is disposed inside the mounting groove. A first elastic element for pushing the mounting block outwards from the mounting groove is disposed inside the mounting groove. An insert is mounted on the mounting block, and a bevel is provided on one side of the mounting block. When the tool holder enters the blank hole, the opening of the blank hole abuts against the bevel. Because the mounting block is slidably disposed inside the mounting groove and has a bevel, the position of the insert can be adjusted via the bevel when boring the cylinder block, and the position of the insert can be fixed via a positioning component. This eliminates the hassle of tool setting when boring cylinder blocks of different sizes, improving work efficiency.

Description

Technical Field

[0001] This invention belongs to the field of boring technology, specifically relating to a boring device for machining the inner wall of a cylinder. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. During the manufacturing process, in order to ensure the precise dimensions, shape, and surface quality of the internal holes of the hydraulic cylinder, a boring machine is needed to bore the inner wall of the cylinder so that the hydraulic cylinder meets the design requirements and working performance.

[0003] Chinese patent CN119794426A discloses a boring device for manufacturing hydraulic cylinder bodies, including a base with a limiting seat fixedly connected to the end of the base. The limiting seat is provided with a positioning part for clamping the hydraulic cylinder body. It also includes a movable plate mounted on the top of the base, wherein the base is provided with a driving part for driving the movable plate to move along the long side of the base. This invention uses guide vanes rotating within a guide box to spray water from the water box outwards through spray holes, cooling the boring tool assembly and the inner wall of the hydraulic cylinder body. This effectively reduces frictional heat, improves the durability of the boring tool assembly, and prevents thermal deformation of the inner wall of the hydraulic cylinder body, ensuring machining accuracy. Furthermore, it lubricates the machining surface, reducing the coefficient of friction, making the boring process smoother, extending the service life of the boring tool assembly, and improving the boring quality of the hydraulic cylinder body.

[0004] For some blanks with a large quantity, multiple rough boring operations are required to machine them to the specified dimensions before finishing. However, the boring diameter of the boring tool set in the above technical solution is fixed, and it can only bore to a fixed size. It cannot continuously bore to different sizes on the blank multiple times, nor can it automatically adjust according to the size of the blank hole. When boring to different sizes, it is necessary to change to different sized tool heads or redo the tool setting, which is time-consuming and labor-intensive, affecting work efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a boring device for machining the inner wall of a cylinder, which aims to solve the problem that the prior art cannot automatically adjust according to the size of the blank hole.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a boring device for machining the inner wall of a cylinder, comprising: a tool holder, wherein a mounting groove is provided on the tool holder, a mounting block is provided inside the mounting groove and sliding along the radial direction of the tool holder, a first elastic element is provided inside the mounting groove for pushing the mounting block to move out of the mounting groove, a cutting blade is mounted on the mounting block, and an inclined surface is provided on one side of the mounting block. When the tool holder enters the blank hole, the opening of the blank hole abuts against the inclined surface, and the inclined surface can push the mounting block to move into the mounting groove. A positioning component is provided on the tool holder for fixing the mounting block inside the mounting groove.

[0007] A further technical solution of the present invention is that the positioning component includes a sliding groove formed on the mounting block, a sliding member that slides along the axial direction of the tool bar is provided inside the sliding groove, a sliding rod is provided on one side of the sliding member, a positioning block is provided at the end of the sliding rod away from the sliding member, a groove for the positioning block to slide is provided on the mounting block, a plurality of positioning grooves are provided on the mounting groove, and a positioning protrusion that cooperates with the positioning groove is provided on the positioning block. When the sliding member moves, the positioning protrusion on the positioning block can engage with the positioning groove, and a second elastic member is provided in the sliding groove to move the positioning groove away from the positioning protrusion.

[0008] A further technical solution of the present invention is that push rollers are rotatably provided on both sides of the mounting block, the rotation axis of the push rollers is located at the eccentricity of the push rollers, and the push rollers can abut against the inner sidewall of the mounting groove when rotating.

[0009] A further technical solution of the present invention is that the push roller is provided with a push surface, which is formed by twisting a rectangular plane into a curved surface. A straight surface extends from one side of the push surface and is connected to the push surface. A receiving groove is provided on the sliding member. A rotating shaft is rotatably provided at one end of the receiving groove near the push roller. The rotating shaft is in contact with the straight surface. When the sliding member slides inside the sliding groove, the rotating shaft can slide to contact the push surface.

[0010] A further technical solution of the present invention is that multiple positioning blocks and sliding rods are provided, the positioning protrusions on the multiple positioning blocks are staggered with each other, and the sliding rod is made of a flexible material, which can push the positioning block to move while also having elastic deformation.

[0011] A further technical solution of the present invention is that a flexible surface is provided on the inner sidewall of the mounting groove, which can come into contact with the flexible surface when the push roller rotates.

[0012] A further technical solution of the present invention is that the flexible surface can be made of hard rubber with a thickness of 1 mm.

[0013] A further technical solution of the present invention is that a friction surface is provided on the outer surface of the push roller.

[0014] A further technical solution of the present invention is that the tip of the blade is positioned higher than the top of the inclined plane.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The mounting block is slidably set inside the mounting groove, and an inclined surface is provided on the mounting block. When boring the cylinder block, the position of the cutting tool can be adjusted by the inclined surface, and the position of the cutting tool can be fixed by the positioning component. This solves the problem of tool setting when boring cylinder blocks of different sizes and improves work efficiency.

[0016] Since the distance between the top of the inclined plane and the tip of the cutting tool is fixed, the depth of cut for each boring operation is fixed. Therefore, when boring a single cylinder multiple times, the problem of frequently adjusting the depth of cut is avoided.

[0017] By setting up push rollers, the position of the mounting block can be further fixed, while also creating a certain gap between the inclined surface and the inner wall of the cylinder, thus preventing wear on the top of the inclined surface. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a specific embodiment of the present invention; Figure 2 This is an isometric sectional view of a specific embodiment of the present invention; Figure 3 This is a radial sectional view of a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the positioning component in a specific embodiment of the present invention; Figure 5 This is a schematic diagram of the axial perspective of the push roller in a specific embodiment of the present invention; Figure 6 for Figure 4 Enlarged structural diagram at point A; Figure 7 This is a schematic diagram of the tool holder structure in a specific embodiment of the present invention; Figure 8 This is a schematic diagram of the sliding component in a specific embodiment of the present invention; Figure 9 This is a schematic diagram of the tool holder mounting structure in a specific embodiment of the present invention.

[0019] In the diagram: 1. Tool holder; 11. Mounting groove; 12. Tool holder; 13. Tool head; 14. Positioning groove; 2. Adjustment assembly; 21. Mounting block; 211. Sliding groove; 22. First elastic element; 23. Inclined surface; 3. Positioning assembly; 31. Sliding element; 32. Second elastic element; 33. Sliding rod; 34. Positioning block; 35. Positioning protrusion; 4. Blade; 5. Avoidance assembly; 51. Push roller; 52. Flexible surface; 53. Push surface; 54. Straight surface; 55. Receiving groove; 56. Rotating shaft; 6. Boring machine. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-9 This invention provides the following technical solution: a boring device for machining the inner wall of a cylinder. This application is applicable to boring environments where the tool is fixed and the cylinder rotates. It includes a tool holder 1, an adjusting component 2, a positioning component 3, and a boring machine 6. The tool holder 1 is mounted on the boring machine 6, and a workpiece fixture is provided on the boring machine 6 to fix the cylinder on the fixture and make the cylinder coaxial with the tool holder 1. The fixture then drives the cylinder to rotate, allowing the tool holder to feed into the cylinder. The adjusting component 2 is mounted on the tool holder 1 and has a cutting tool 4. The adjusting component 2 is used to adjust the radial position of the cutting tool 4, thereby adjusting the boring size. The positioning component 3 is mounted on the tool holder 1 to fix the position of the adjusting component 2, preventing displacement of the adjusting component 2 during boring and thus avoiding reduced accuracy.

[0022] Please see Figure 1 , Figure 2 The tool holder 1 includes a tool holder 12 and a tool head 13. A mounting groove 11 is provided on the tool head 13. One end of the mounting groove 11 has an opening. The adjustment component 2 can be installed inside the mounting groove 11 through the opening and slide along the radial direction of the tool holder 1 inside the mounting groove 11. At the same time, the stability of the adjustment component 2 sliding inside the mounting groove 11 can be improved by the sliding groove slider structure, so that the adjustment component 2 slides more smoothly inside the mounting groove 11.

[0023] The adjustment assembly 2 includes a mounting block 21 that slides inside the mounting groove 11. A first elastic element 22 is provided between the mounting block 21 and the inner bottom wall of the mounting groove 11. The first elastic element 22 is a compression spring, one end of which is fixed to the inner bottom wall of the mounting groove 11 and the other end is fixed to the mounting block 21. When the mounting block 21 moves toward the inner bottom wall of the mounting groove 11, the first elastic element 22 can be compressed and stored. An inclined surface 23 is provided at one end of the mounting block 21 away from the tool holder 12. The position of the end of the inclined surface 23 away from the tool holder 12 is closer to the inner bottom wall of the mounting groove 11 than the position of the end closer to the tool holder 12. This allows the bore of the cylinder to abut against the inclined surface 23 when boring the cylinder body. By continuously penetrating the cylinder body, the inclined surface 23 can push the mounting block 21 to slide into the mounting groove 11, thereby adjusting the position of the blade 4. Then, the position of the mounting block 21 is fixed by the positioning component 3. The blade tip of the blade 4 is a certain distance higher than the end of the inclined surface 23 away from the tool holder 12. This distance is the depth of cut of the blade 4. At this time, the cylinder body rotates, and the tool holder 1 moves into the cylinder body, so that the blade 4 can perform boring operations on cylinder bodies of different sizes.

[0024] Please see Figure 2 , Figure 4 , Figure 7 and Figure 8 To prevent radial displacement of the mounting block 21 during boring, a positioning assembly 3 is provided on the tool holder 1. This positioning assembly 3 includes a sliding member 31. A sliding groove 211 is formed on the mounting block 21, allowing the sliding member 31 to slide axially within the sliding groove 211. A second elastic member 32, a compression spring, is provided in the sliding gap between the sliding member 31 and the sliding groove 211. One end of the compression spring is fixed to the inner wall of the sliding groove 211, and the other end is fixed to one side of the sliding member 31, causing the second elastic member 32 to push the sliding member 31 away from the tool holder 12. A [missing information - likely a typo or missing word] is provided on one side of the sliding member 31 near the bottom. The slide rod 33 has a positioning block 34 at one end away from the sliding member 31. The mounting block 21 has a groove for the positioning block 34 to slide, with the opening of the groove facing the end of the mounting groove 11 near the tool holder 12. The mounting groove 11 has multiple horizontally arranged positioning grooves 14 at the end near the tool holder 12. The positioning block 34 has a positioning protrusion 35 that can cooperate with the positioning groove 14. When the sliding member 31 moves towards the tool holder 12, the slide rod 33 drives the positioning protrusion 35 on the positioning block 34 to engage with the positioning groove 14, thereby limiting the vertical displacement of the mounting block 21 and preventing the mounting block 21 from shifting during the boring process.

[0025] Furthermore, multiple positioning blocks 34 can be configured. When multiple positioning blocks 34 are distributed laterally, the positioning protrusions 35 on the multiple positioning blocks 34 are staggered, making it easier for one of the positioning protrusions 35 to be inserted into the positioning groove 14. This effectively reduces the situation where the positioning protrusion 35 is not inserted into the positioning groove 14 during the boring process. At this time, the material of the slide rod 33 is a flexible material with a small amount of elastic deformation, specifically hard rubber. When the positioning protrusion 35 on one of the positioning blocks 34 is engaged with the positioning groove 14, the remaining positioning blocks 34 that are not inserted into the positioning groove 14 push the slide rod 33 to compress, avoiding interference between the positioning blocks 34 that are not inserted into the positioning groove 14 and the positioning groove 14.

[0026] During rough boring and positioning of the cylinder body, the position of the cutting tool 4 is adjusted by the inclined plane 23. Specifically, the opening of the cylinder body abuts against the inclined plane 23, causing the inclined plane 23 to push the mounting block 21 into the mounting groove 11 until the end of the inclined plane 23 near the tool holder 12 enters the inner wall of the cylinder body. At this time, under the action of the first elastic member 22, the end of the inclined plane 23 near the tool holder 12 is always in contact with the inner wall of the cylinder body. Then, it continues to move into the cylinder body until the cylinder body abuts against the cutting tool 4. When the cutting tool 4 pushes the sliding member 31 to move inside the sliding groove 211, the positioning protrusion 35 engages with the positioning groove 14, thereby fixing the position of the mounting block 21 in the mounting groove 11. However, during boring... During the process, since the end of the inclined surface 23 near the tool holder 12 is always in contact with the inner wall of the cylinder, friction will occur between the end of the inclined surface 23 near the tool holder 12 and the inner wall of the cylinder. Over time, this will easily cause wear on the end of the inclined surface 23 near the tool holder 12, which will increase the distance between the end of the inclined surface 23 near the tool holder 12 and the tip of the cutting tool 4. This will affect the depth of cut of the cylinder each time, thus affecting the rough boring accuracy of the cylinder. Therefore, a clearance component 5 is provided on the mounting block 21. The clearance component 5 can lower the mounting block 21 by a fixed distance to prevent the end of the inclined surface 23 near the tool holder 12 from contacting the inner wall of the cylinder and to prevent wear on the end of the inclined surface 23 near the tool holder 12. Please see Figures 3-6The avoidance component 5 includes push rollers 51 mirror-mounted on both sides of the mounting block 21. The push rollers 51 are rotatable on the mounting block 21. The cross-section of the push rollers 51 is circular, and the axis of rotation is located at the eccentric point of the push rollers 51, making the cross-section of the push rollers 51 form an eccentric wheel shape. The base circle a of the push rollers 51 faces outward from the mounting block 21 and does not extend beyond the plane of the side wall of the mounting block 21, ensuring that the push rollers 51 do not contact the side wall of the mounting groove 11 when the mounting block 21 is raised or lowered. As the push rollers 51 rotate, the protruding tip b gradually rotates outward from the mounting block 21, causing the push rollers 51 to gradually contact the inner side wall of the mounting groove 11. A flexible surface 52 is provided on the inner wall of the mounting groove 11. The flexible surface 52 can be made of hard rubber with a thickness of 1mm. When the push roller 51 rotates, it will contact the flexible surface 52 and squeeze the flexible surface 52. At this time, due to the friction between the push roller 51 and the flexible surface 52, the push roller 51 will drive the mounting block 21 to move a certain distance towards the bottom of the mounting groove 11 when it rotates. This will make the end of the inclined surface 23 near the tool holder 12 move away from the inner wall of the cylinder by a certain distance, thereby avoiding the end of the inclined surface 23 near the tool holder 12 from rubbing against the inner wall of the cylinder for a long time, which would cause the end of the inclined surface 23 near the tool holder 12 to wear.

[0027] The rotation of the push roller 51 continuously squeezes the flexible surface 52 on the inner wall of the mounting groove 11, thereby continuously increasing the friction between the push roller 51 and the flexible surface 52. Since the flexible surface 52 is fixed on the inner wall of the mounting groove 11, the friction between the push roller 51 and the inner wall of the mounting groove 11 is indirectly increased, which further prevents the mounting block 21 from moving towards the inner bottom wall of the mounting groove 11, thus preventing the mounting block 21 from shifting towards the inner bottom wall during the boring process.

[0028] Furthermore, in order to avoid friction between the flexible surface 52 and the push roller 51, a friction surface is provided on the outer surface of the push roller 51 to increase the friction between the push roller 51 and the flexible surface 52.

[0029] Please see Figure 5 and Figure 6 In order to drive the push roller 51 to rotate, a push surface 53 is provided on the push roller 51. The push surface 53 is formed by twisting a rectangular plane into a curved surface. Specifically, the rectangular plane consists of two straight line segments c that are parallel to each other and arranged in the radial direction of the push roller 51, and two straight line segments d that are parallel to each other and arranged in the axial direction of the push roller 51. After twisting, the two line segments d are spiral, and the two line segments c intersect when viewed from the axial direction of the push roller 51. The curved surface formed by the two line segments c and the two line segments d after twisting is the push surface 53. A straight surface 54 extends on one side of the push surface 53 and is connected to the push surface 53.

[0030] Please see Figure 6 and Figure 8 A receiving groove 55 is provided on the sliding member 31. A rotating shaft 56 is rotatably provided at one end of the receiving groove 55 near the push roller 51. The rotating shaft 56 is in contact with the straight surface 54. When the sliding member 31 slides inside the sliding groove 211, the rotating shaft 56 can slide to contact the push surface 53 and slide on the push surface 53. Since the push surface 53 is twisted, the rotating shaft 56 will drive the push roller 51 to rotate when it slides on the push surface 53. Thus, when the sliding member 31 slides inside the sliding groove 211, it can drive the mounting block 21 to move downward a certain distance. At the same time, the movement of the sliding member 31 can also drive the positioning component 3 to fix the position of the mounting block 21. In addition, the downward movement of the sliding member 31 makes it easier for the positioning protrusion 35 on the positioning block 34 to engage with the positioning groove 14, avoiding the situation where the positioning protrusion 35 is difficult to engage with the positioning groove 14.

Claims

1. A boring device for machining the inner wall of a cylinder, comprising: The tool holder (1) is characterized in that a mounting groove (11) is provided on the tool holder (1), and a mounting block (21) that slides radially along the tool holder (1) is provided inside the mounting groove (11). A first elastic element (22) for pushing the mounting block (21) to move out of the mounting groove (11) is provided inside the mounting groove (11). A blade (4) is mounted on the mounting block (21). An inclined surface (23) is provided on one side of the mounting block (21). When the tool holder (1) enters the blank hole, the opening of the blank hole abuts against the inclined surface (23), and the inclined surface (23) can push the mounting block (21) to move into the mounting groove (11). A positioning component (3) is provided on the tool holder (1). The positioning component (3) is used to fix the mounting block (21) inside the mounting groove (11). (3) Includes a sliding groove (211) on the mounting block (21), a sliding member (31) that slides along the axial direction of the tool bar (1) is provided inside the sliding groove (211), a sliding rod (33) is provided on one side of the sliding member (31), a positioning block (34) is provided at the end of the sliding rod (33) away from the sliding member (31), a groove for the positioning block (34) to slide is provided on the mounting block (21), a plurality of positioning grooves (14) are provided on the mounting groove (11), a positioning protrusion (35) that cooperates with the positioning groove (14) is provided on the positioning block (34), when the sliding member (31) moves, the positioning protrusion (35) on the positioning block (34) can engage with the positioning groove (14), and a second elastic member (32) that makes the positioning groove (14) away from the positioning protrusion (35) is provided inside the sliding groove (211).

2. The boring device for machining the inner wall of a cylinder according to claim 1, characterized in that: The mounting block (21) is rotatably equipped with push rollers (51) on both sides. The rotation axis of the push rollers (51) is located at the eccentricity of the push rollers (51). When the push rollers (51) rotate, they can abut against the inner wall of the mounting groove (11).

3. The boring device for machining the inner wall of a cylinder according to claim 2, characterized in that: The push roller (51) has a push surface (53), which is formed by twisting a rectangular plane into a curved surface. A straight surface (54) extends from one side of the push surface (53) and is connected to the push surface (53). The sliding member (31) has a receiving groove (55). A rotating shaft (56) is rotatably provided at one end of the receiving groove (55) near the push roller (51). The rotating shaft (56) is in contact with the straight surface (54). When the sliding member (31) slides inside the sliding groove (211), the rotating shaft (56) can slide to contact the push surface (53).

4. A boring device for machining the inner wall of a cylinder according to claim 3, characterized in that: The positioning blocks (34) and slide rods (33) are provided in multiple ways. The positioning protrusions (35) on the multiple positioning blocks (34) are staggered with each other. The slide rods (33) are made of flexible material, which can push the positioning blocks (34) to move while also having elastic deformation.

5. A boring device for machining the inner wall of a cylinder according to claim 4, characterized in that: The inner wall of the mounting groove (11) is provided with a flexible surface (52), which can come into contact with the flexible surface (52) when the push roller (51) rotates.

6. A boring device for machining the inner wall of a cylinder according to claim 5, characterized in that: The flexible surface (52) is made of hard rubber with a thickness of 1 mm.

7. A boring device for machining the inner wall of a cylinder according to claim 6, characterized in that: A friction surface is provided on the outer surface of the push roller (51).

8. A boring device for machining the inner wall of a cylinder according to claim 1, characterized in that: The tip of the blade (4) is higher than the top of the inclined plane (23).

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