Numerical control turning tool for machining non-rotary body part
By designing a tool for CNC lathes, including jackets, fixing sleeves and fastening devices, the problem of accuracy and cost when processing inner holes of non-swivel output cylinder parts of high-strength alloy steel is solved, and high-precision and low-cost processing effect is achieved.
Patent Information
- Application Number
- CN202421726688.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-20
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-20
AI Technical Summary
When processing the inner holes of non-swivel output cylinder parts made of high-strength alloy steel, the prior art is difficult to ensure high accuracy and low cost. Especially when directly clamping and processing on CNC lathes, there are challenges that coaxiality and cylindricality are difficult to meet.
A vehicle for CNC lathes is designed, including jackets, fixing sleeves and fastening devices. The assembly and disassembly of each part is easy to be assembled and disassembled. Using a combined structure of jackets and fixing sleeves, the coaxial positioning and precise processing of the parts are ensured through the cooperation of the fastening device.
The inner holes of high-precision processing of high-strength alloy steel parts on CNC lathes are realized, ensuring that the coaxiality and cylindricality of the parts meet the design requirements, while reducing processing costs and improving operational convenience.
Smart Images
Figure CN222903296U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of machining, and particularly relates to a numerical control lathe tool for machining non-rotary parts. Background Art
[0002] An output cylinder part with a non-rotary shape is shown in Figure 1 , because the two end holes play a positioning role during assembly, the drawing requires ensuring the coaxiality of φ0.012, cylindricity of φ0.007, and roughness Ra0.4 for the two end holes. The coaxiality of the center distances of the two end ring grooves is φ0.008. The part material 00Ni18Co8Mo5TiAl belongs to high-strength alloy steel, and the hardness is HRC57 - 60. When machining the inner hole, it is the final finishing stage.
[0003] There are two machining schemes considered according to the structure of this part: First, machining on a five-axis machining center, making two-piece bushings for clamping, and positioning and clamping once to machine the two end holes. However, because the required dimensions and geometric tolerances of the part are relatively high, the coaxiality and cylindricity are both between grade 4 and grade 5, and HRC57 - 60 is very difficult for machining. When using a five-axis device, it is necessary to make a fixture to clamp the middle part of the part and machine the dimensions of the two end holes respectively. Second, machining on a numerical control lathe also requires a lathe tool that can machine the two end holes with one positioning. However, comparing these two methods, for machining such high-precision and hard inner holes, the machining efficiency of the numerical control lathe is higher and the cost is lower. Content of the Utility Model
[0004] The purpose of the utility model is to provide a numerical control lathe tool for non-rotary output cylinder parts with high precision and convenient use, which can make it convenient for the operator while ensuring the machining quality of the parts.
[0005] The technical solution of the utility model: A lathe tool used on a numerical control lathe, which is composed of parts such as two-piece clamping sleeves, a fixed sleeve, and set screws. The assembly and disassembly of each part are convenient, which is conducive to maintenance and replacement. It includes a clamping sleeve, a fixed sleeve, and a fastening device; the clamping sleeve is composed of a first clamping sleeve and a second clamping sleeve arranged symmetrically. The first clamping sleeve is a semi-cylindrical C-shaped structure, and the first clamping sleeve and the second clamping sleeve have the same shape; the clamping sleeve is arranged on the outer side of the middle part of the non-rotary part, the outer diameter of the clamping sleeve is larger than the outer shape of the non-rotary part, and the inner side of the clamping sleeve and the outer side of the middle part of the non-rotary part maintain an H9 / f9 clearance fit; the fixed sleeve is in a cylindrical shape, the inner side of the fixed sleeve and the outer side of the clamping sleeve maintain an H9 / f9 clearance fit, the fixed sleeve is provided with holes for cooperating with the fastening device, and the fixed sleeve is fixed to the outer side of the clamping sleeve through the fastening device.
[0006] Further, the inner side surface of the first jacket transitions to the axial end face with a chamfer R1, the two end faces of the first jacket transition to the inner side surface with a chamfer R3, and the two end faces of the first jacket transition to the outer side surface with a chamfer R2; the second jacket is the same as the first jacket.
[0007] Further, the holes are arranged near both ends of the fixed sleeve and are evenly arranged circumferentially with 8 holes.
[0008] Further, the inner side surface of the fixed sleeve transitions to the end face with a chamfer R2, and the outer side surface of the fixed sleeve transitions to the end face with a chamfer R2.
[0009] The fastening device is a screw, an internal hexagonal set screw, and its length is shorter than the length of the threaded hole to ensure that the screw head cannot protrude from the fixed sleeve. And 2 groups of 4 screw holes evenly distributed along the circumferential direction are made at both ends of the vehicle tool for fixation.
[0010] All the tooling are structural parts. To ensure that the two-piece jacket does not damage the part when clamping the outer circle, 2A12-T4 hard aluminum is used. Considering additional machining, in order to prevent rust, the material of the fixed sleeve is stainless steel such as 1Cr17Ni2, HRC35 - 40. The inner hole of the fixed sleeve and the outer circle of the two-piece jacket maintain an H9 / f9 clearance fit. 2 groups of 4 screw holes evenly distributed along the circumference, 4×M10, are machined at both ends of the fixed sleeve for installing set screws.
[0011] Advantages of the present utility model:
[0012] (1) The two-piece jacket is made of aluminum material to ensure that the tooling does not damage the outer circle of the machined part during use;
[0013] (2) The two-piece jacket is installed in the middle of the part, and the outer circle dimension of the jacket is larger than the maximum outer diameter of the part, ensuring that the fixed sleeve can easily pass through the part shape and fit with the jacket.
[0014] (3) The vehicle tool is of a combined type, which is very convenient for processing, assembly and maintenance.
[0015] (4) A special CNC vehicle tool is designed, which is easy to operate and solves the problem that the original part cannot be directly clamped on the CNC lathe. Description of the Drawings
[0016] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments in line with the present utility model, and are used together with the specification to explain the principles of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:
[0017] Figure 1Schematic structural diagram of the output cylinder part which is a non-rotary body;
[0018] Figure 2 Top view of the output cylinder part which is a non-rotary body;
[0019] Figure 3 Schematic structural diagram of the numerical control lathe tool for processing non-rotary body parts provided by the present utility model and the part assembly;
[0020] Figure 4 Schematic structural diagram of the numerical control lathe tool for processing non-rotary body parts provided by the present utility model;
[0021] Figure 5 For Figure 4 A - A sectional view of;
[0022] Figure 6 Schematic structural diagram of the chuck of the numerical control lathe tool for processing non-rotary body parts provided by the present utility model;
[0023] Figure 7 Left view of the chuck of the numerical control lathe tool for processing non-rotary body parts provided by the present utility model;
[0024] Figure 8 Schematic structural diagram of the fixed sleeve of the numerical control lathe tool for processing non-rotary body parts provided by the present utility model;
[0025] Figure 9 Left view of the fixed sleeve of the numerical control lathe tool for processing non-rotary body parts provided by the present utility model;
[0026] In the drawings: 1 - chuck, 11 - first chuck, 12 - second chuck, 111 - inner side surface one, 112 - axial end face, 113 - two end faces one, 114 - outer side surface one, 115 - first chamfer, 116 - second chamfer, 117 - third chamfer
[0027] 2 - fixed sleeve, 21 - hole, 221 - inner side surface two, 222 - end face two, 223 - outer side surface two, 224 - fourth chamfer, 225 - fifth chamfer
[0028] 3 - fastening device, 4 - part. Detailed implementation manners
[0029] Now, example embodiments will be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this utility model will be more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art.
[0030] Please refer to Figure 3-9, which shows a schematic structural diagram of a numerically controlled lathe tool for machining non-rotary parts provided by the present utility model, including a collet 1, a fixed sleeve 2 and a fastening device 3; the collet 1 is composed of a first collet 11 and a second collet 12 which are symmetrically arranged, the first collet 11 is a semi-cylindrical structure in a C shape, and the first collet 11 and the second collet 12 have the same shape; the collet 1 is arranged on the outer side of the middle part of the non-rotary part, and the outer diameter of the collet 1 is larger than the outer shape of the non-rotary part, so that the fixed sleeve 2 can "pass through" the part 4 and be fixed on the collet 1. The inner side of the collet 1 and the outer side of the middle part of the non-rotary part maintain an H9 / f9 clearance fit; the fixed sleeve 2 is in a cylindrical shape, the inner side of the fixed sleeve 2 and the outer side of the collet 1 maintain an H9 / f9 clearance fit, the fixed sleeve 2 is provided with a hole 21 for cooperating with the fastening device 3, and the fixed sleeve 2 is fixed on the outer side of the collet 1 through the fastening device 3. The fastening device 3 is an internal hexagonal screw, and the length of the fastening device 3 is less than the length of the hole 21 to ensure that the screw head cannot protrude from the fixed sleeve, and 2 groups of 4 screw holes evenly distributed along the circumferential direction are made at both ends of the lathe tool for fixation. After machining one end, without disassembling the tooling, directly turn around and machine the other end to ensure the coaxiality of the holes at both ends. In order to ensure that the two-piece collet does not damage the part when clamping the outer circle, the collet 1 is made of 2A12-T4 hard aluminum. In order to prevent it from rusting, the material of the fixed sleeve is stainless steel such as 1Cr17Ni2, HRC35 - 40.
[0031] Figure 6-7 , which shows a schematic structural diagram of the collet of the numerically controlled lathe tool for machining non-rotary parts provided by the present utility model. The collet 1 is composed of a first collet 11 and a second collet 12 which are symmetrically arranged. The first collet 11 is a semi-cylindrical structure in a C shape, and the first collet 11 and the second collet 12 have the same shape; a first chamfer 115 with a chamfer of R1 is formed at the transition between the inner side surface 111 of the first collet 11 and the axial end surface 112, a second chamfer 116 with a chamfer of R3 is formed at the transition between the two end surfaces 113 of the first collet 11 and the inner side surface 111, and a third chamfer 117 with a chamfer of R2 is formed at the transition between the two end surfaces 113 of the first collet 11 and the outer side surface 114; the second collet 12 and the first collet 11 have the same chamfer transition.
[0032] Figure 8-9 , which shows a schematic structural diagram of the fixed sleeve of the numerically controlled lathe tool for machining non-rotary parts provided by the present utility model. A fourth chamfer 224 with a chamfer of R2 is formed at the transition between the inner side surface 221 of the fixed sleeve 2 and the end surface 222, and a fifth chamfer 225 with a chamfer of R2 is formed at the transition between the outer side surface 223 of the fixed sleeve 2 and the end surface 222.
[0033] Figure 1-2 For the part Figure 1Part drawing of an output cylinder with a non-rotary body shape. Since the φ43H8 holes at both ends of the part play a positioning role during assembly, the drawing requires ensuring the coaxiality of φ0.012, cylindricity of φ0.007, and surface roughness Ra0.4 for the φ43H8(+0.039 0) holes at both ends. The coaxiality of φ0.008 for the center distance of φ42.79±0.012 of the two end ring grooves. The part material 00Ni18Co8Mo5TiAl belongs to high-strength alloy steel, with a length L = 246mm and a hardness of HRC57 - 60. The inner hole machining is the final finishing stage.
[0034] First, in order to ensure that the outer circle of the part is not damaged when the two-piece clamp sleeve is clamped, 2A12-T4 hard aluminum is used. The inner hole and outer circle are positioned and machined at one time to ensure the coaxiality of the tooling. After completion, it is wire-cut into two parts. Since the hole size generally shrinks after the part is separated, the inner hole is machined 0.2 - 0.3 larger than the outer circle size of the part. The two-piece clamp sleeve is installed in the middle of the part, and the two ends of the hole are chamfered with R3 to avoid the R2 on the outer circle of the part. Secondly, in order to ensure the coaxiality of the outer circle of the tooling and the part during the use of the tooling, the lathe operator will supplement the machining of the outer circle of the fixed sleeve before machining the hole. Therefore, the outer circle of the fixed sleeve needs to leave a margin of 2 - 3 / bilateral according to the drawing size. Considering the need for supplementary machining and to prevent rust, the material of the fixed sleeve is stainless steel such as 1Cr17Ni2, with HRC35 - 40. The inner hole of the fixed sleeve and the outer circle of the two-piece clamp sleeve maintain an H9 / f9 clearance fit. Two groups of screw holes 4×M10 evenly distributed along the circumference are machined at both ends of the fixed sleeve to install set screws.
[0035] During use, first, the process is required to chamfer the two ends of the part 4 at 60°. The inner hole of the clamp sleeve 1 is machined according to the outer circle in the middle of the part +0.2, with a tolerance of +0.1, that is Machined. The inner hole and outer circle of the clamp sleeve 1 are positioned and machined at one time to ensure coaxiality. After being divided into two parts, the split of the clamp sleeve 1 needs to be chamfered with R1 to avoid scratching the surface of the part during clamping. Since the outer circumcircle of the part 4 relative to the axis of rotation is φ98, the outer circle of the clamp sleeve of the designed tooling is φ100f9, with a clearance fit with the inner hole φ100H9 of the fixed sleeve 2. After fixing the part 4, the operator needs to first use the two-point method to machine the outer circle of the fixed sleeve 2 to ensure that the outer circle of the fixed sleeve 2 is consistent with the rotation center of the part 4 before clamping the outer circle of the fixed sleeve 2 to machine the inner hole of the part 4. After machining one end hole, without disassembling the tooling, the tooling and the part are turned around to machine the other end inner hole. Since the position of the part relative to the tooling has not changed, the finally machined part has a coaxiality of 0.006 and a cylindricity of 0.003, meeting the design requirements.
[0036] The above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Any modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, are covered by the claims of the present invention.
Claims
1. A CNC lathe for machining non-rotating parts, characterized in that: The invention comprises a jacket (1), a fixing jacket (2) and a fastening device (3); the jacket (1) is composed of a first jacket (11) and a second jacket (12) which are symmetrically arranged; the first jacket (11) is a semi-cylindrical C-shaped structure; the first jacket (11) and the second jacket (12) are of the same shape; the jacket (1) is arranged on the outer side of the middle part of a non-rotating part; the outer diameter of the jacket (1) is larger than the outer shape of the non-rotating part; the inner side of the jacket (1) and the outer side of the middle part of the non-rotating part maintain a clearance fit of H9 / f9; the fixing jacket (2) is cylindrical; the inner side of the fixing jacket (2) and the outer side of the jacket (1) maintain a clearance fit of H9 / f9; the fixing jacket (2) is provided with a hole (21) which cooperates with the fastening device (3); the fixing jacket (2) is fixed to the outer side of the jacket (1) by the fastening device (3).
2. The CNC lathe for machining non-rotating parts according to claim 1, characterized in that: The inner side surface (111) of the first jacket (11) and the axial end surface (112) form a first chamfer (115) for chamfer R1 transition, the two end surfaces (113) of the first jacket (11) and the inner side surface (111) form a second chamfer (116) for chamfer R3 transition, and the two end surfaces (113) of the first jacket (11) and the outer side surface (114) form a third chamfer (117) for chamfer R2 transition; the second jacket (12) is the same as the first jacket (11).
3. The CNC lathe for machining non-rotating parts according to claim 1, characterized in that: The holes (21) are evenly arranged in two groups along the circumference of the fixing sleeve (2), with four holes in each group, and are arranged near the two ends of the fixing sleeve (2).
4. The CNC lathe for machining non-rotating parts according to claim 1, characterized in that: The second inner side surface (221) of the fixing sleeve (2) and the second end surface (222) form a fourth chamfer (224) for chamfer R2 transition, and the second outer side surface (223) of the fixing sleeve (2) and the second end surface (222) form a fifth chamfer (225) for chamfer R2 transition.
5. The CNC lathe for machining non-rotating parts according to claim 1, characterized in that: The fastening device (3) is a hexagon socket screw, and the length of the fastening device (3) is smaller than the length of the hole (21).
6. The CNC lathe for machining non-rotating parts according to claim 1, characterized in that: The material of the clamping sleeve (1) is aluminum, and the material of the fixing sleeve (2) is stainless steel.