CN112192160A - Machining method of slotted cylindrical cavity part - Google Patents
Machining method of slotted cylindrical cavity part Download PDFInfo
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- CN112192160A CN112192160A CN202011085293.XA CN202011085293A CN112192160A CN 112192160 A CN112192160 A CN 112192160A CN 202011085293 A CN202011085293 A CN 202011085293A CN 112192160 A CN112192160 A CN 112192160A
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- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention provides a processing method of a slotted cylinder type cavity part, which comprises the steps of firstly carrying out rough processing of turning and milling on a metal cylinder type processing raw material, then carrying out rough processing on a through groove, and finally carrying out finish processing of turning and milling. The invention can well ensure the dimensional accuracy and the cylindricity of the parts, and has the advantages of stable and reliable quality, good consistency, high part interchangeability, compact process flow, high production efficiency, convenient operation and low labor intensity. In addition, the heat treatment process is omitted, the process flow is simplified, the processing period is shortened, and the production cost is reduced.
Description
Technical Field
The invention relates to a processing method of a slotted cylinder cavity part.
Background
Cylindrical cavity part is owing to be solid of revolution structure, and the most of machining volume of part can adopt lathe work to accomplish, and processing is convenient, and is efficient, consequently has obtained general application in fields such as chemical industry, machinery, aviation, space flight, and this type of part has advantages such as thin, compact structure of wall, sometimes in order to satisfy the cooperation and the fixed connection of mutual locating surface between the part, often can set up structural feature such as mounting hole, recess, boss. The cylindrical cavity part shown in fig. 1 and 2 is made of aluminum alloy 2A 12H 112, the main structure is a cylinder, the inner diameter and the outer diameter of the cylinder are 202mm, 210mm and 54mm in height, a disc-shaped flange is arranged at the bottom of the cylinder, the diameter of the flange is 230mm and the thickness of the flange is 4mm, mounting holes are formed in the end face of the cylinder, grooves are formed in radial equal division, the front and the rear grooves are 50mm wide and 45mm deep, the left and the right grooves are 40mm wide and 30mm deep, mounting bosses and mounting hole positions are symmetrically arranged at the bottom of the cylinder, and semicircular notches and mounting hole positions are formed in the flange in equal division.
Because this part drum part wall thickness 4mm, the wall is thin, and radially is provided with and runs through the recess, therefore part yielding in the course of working, and size precision is difficult to control, and the cylindricity is difficult to be guaranteed, runs through the rigidity that the recess has weakened the part, and the processing back drum is inside and outside often to be oval-shaped, seriously influences the assembly of part and uses. In order to solve the problem, a heat treatment stress removing step is usually added in the machining process, and although the method can better improve the deformation and the cylindricity of the part, the process flow is complicated, the production efficiency is low, and the production cost is high.
Disclosure of Invention
In order to solve the technical problems, the invention provides a processing method of a slotted cylinder type cavity part, which can well ensure the dimensional accuracy and the cylindricity of the part, and has stable and reliable quality, good consistency and high part interchangeability.
The invention is realized by the following technical scheme.
The invention provides a processing method of a slotted cylindrical cavity part, which comprises the steps of firstly carrying out rough processing of turning and milling on a metal cylindrical processing raw material, then carrying out rough processing on a through groove, and finally carrying out finish processing of turning and milling.
Preferably, the method comprises the following steps:
feeding: the processing raw material is in a metal cylinder shape;
secondly, rough turning: reserving at least 0.5mm of allowance, firstly processing the excircle, and then processing the stepped hole;
③ rough milling: firstly, processing the outline by using an end mill with the specification of less than phi 15mm, and then processing a groove and/or a through hole;
fourthly, fine turning: machining an excircle and an end face by adopting a diamond turning tool;
fine milling: and (3) using an end mill with the specification of less than phi 15mm to sequentially process the outline, the groove and/or the through hole, the end face and the surface mounting hole.
In the second step and the fourth step, the processing raw materials are clamped and fixed by a three-jaw chuck.
In the third step and the fifth step, the processing raw materials are fixed by a clamping apparatus pressing flange plate.
And in the third step, a 1mm allowance is reserved.
And the flange plate is obtained by processing in the second step.
The processing raw material is obtained by removing flash and burrs after extrusion treatment.
In the second step, allowance is left on the single side of the diameter and the thickness of the inner circle and the outer circle.
The invention has the beneficial effects that: the size precision and cylindricity of assurance part that can be fine, the steady and reliable of quality, the uniformity is good, and part interchangeability is high, and process flow is compact moreover, and production efficiency is high, simple operation, low in labor strength. In addition, the heat treatment process is omitted, the process flow is simplified, the processing period is shortened, and the production cost is reduced.
Drawings
FIG. 1 is a schematic structural view of a part to be machined according to an embodiment of the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a cross-sectional view of fig. 1.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
The invention provides a processing method of a slotted cylinder cavity part, which comprises the steps of firstly carrying out rough processing of turning and milling on a metal cylinder-shaped processing raw material, then carrying out rough processing on a through groove, and finally carrying out finish processing of turning and milling.
Specifically, the method comprises the following steps:
feeding: the processing raw material is in a metal cylinder shape;
secondly, rough turning: reserving at least 0.5mm of allowance, firstly processing the excircle, and then processing the stepped hole;
③ rough milling: firstly, processing the outline by using an end mill with the specification of less than phi 15mm, and then processing a groove and/or a through hole;
fourthly, fine turning: machining an excircle and an end face by adopting a diamond turning tool;
fine milling: and (3) using an end mill with the specification of less than phi 15mm to sequentially process the outline, the groove and/or the through hole, the end face and the surface mounting hole.
In the second step and the fourth step, the processing raw materials are clamped and fixed by a three-jaw chuck.
In the third step and the fifth step, the processing raw materials are fixed by a clamping apparatus pressing flange plate.
And step three, reserving 1mm of allowance.
The flange plate is obtained by processing in the second step.
The processing raw material is obtained by removing flash and burrs after extrusion treatment.
And step two, reserving allowance on the single side of the diameter and the thickness of the inner circle and the outer circle.
Example 1
By adopting the scheme, the processing method for the slotted cylindrical cavity part shown in the figures 1 and 2 mainly comprises the following steps:
1. blanking:
extruding the raw material into a circular bar with the diameter of 234mm and the thickness of 62mm, and removing burrs and fins after extrusion treatment.
2. Turning:
(a) the three-jaw chuck clamps the bar and flattens the end face;
(b) turning an outer circle, wherein the single side of the outer circle is left with 1mm of allowance on the basis of the outer circle of the part cylinder, the size of the outer circle reaches phi 212mm, and the length size reaches 54 mm;
(c) drilling and boring a stepped hole, wherein the depth dimension of the small hole reaches 54mm, the diameter dimension of the small hole is 2mm smaller than the diameter of the smallest circle tangent to the edge of the boss at the bottom of the cylinder, the depth dimension of the large hole is consistent with the height of the boss arranged at the bottom of the part cylinder, the diameter dimension of the large hole is 1mm of the single side on the basis of the inner circle of the part cylinder, and the diameter reaches phi 200 mm;
(d) turning around, clamping the outer circle of the cylinder by the three-jaw chuck, flattening the end face, turning the outer circle of the flange, and reserving 1mm allowance for the diameter and the thickness of the single side, wherein the diameter is up to phi 232mm, and the thickness is up to 6mm, as shown in figure 3.
3. And (3) numerical control milling:
(a) placing a part on a workbench, pressing a flange plate by using a fixture, aligning the center of the part, milling by using a straight shank vertical milling cutter with the specification of phi 12mm, removing partial materials of a connecting area of a large hole and a small hole shown in the figure 3, forming the appearance outline of a boss at the bottom of a cylinder, keeping 1mm allowance on the single side of the appearance outline of the boss during processing, ensuring that the processing depth is consistent with the bottom surface of the small hole shown in the figure 3, and connecting the side surface with the arc surface of the large hole shown in the figure 3;
(b) and processing a through groove. The straight shank vertical milling cutter with the specification of phi 12mm is used for milling, 1mm of allowance is left on one side of the width dimension of the groove, the depth dimension is the same as the depth dimension of the groove of the part, the front groove and the rear groove are 48mm wide and 45mm deep, and the left groove and the right groove are 38mm wide and 30mm deep.
4. Turning:
(a) the three-jaw chuck clamps the grooved cylinder excircle and the end surface is flat, so that the thickness of the flange plate reaches 5 mm. Turning the excircle of the flange plate to enable the diameter of the excircle of the flange plate to be phi 230 mm;
(b) turning around, clamping the excircle of the flange plate by the three-jaw chuck, flattening the end face, and processing the excircle of the cylinder, wherein the excircle dimension reaches phi 210mm, the length dimension reaches 54mm, the thickness dimension of the flange plate reaches 4mm, the inner hole dimension reaches phi 202mm, and the depth dimension is consistent with the height of a boss arranged at the bottom of the cylinder of the part.
5. And (3) numerical control milling:
(a) and placing the part on a workbench, pressing the flange plate by using a clamping device, and aligning the center of the part and the processing reference. Milling by using a straight shank vertical milling cutter with the specification of phi 12mm, and processing the bottom surface of the cylinder and the contour of the boss at the bottom of the cylinder;
(b) and processing a through groove. Using a straight shank vertical milling cutter with the specification of phi 12mm to perform numerical milling, wherein the side surfaces and the bottom surfaces of the front groove, the rear groove, the left groove and the right groove are formed;
(c) processing mounting holes on the end surface of the cylinder and the surface of the boss;
(d) and (5) turning the part for machining. And (3) taking the step end face of the flange plate as a supporting surface, taking the groove and the center of the excircle as processing references, pressing the flange plate (needing to avoid the processing position), and processing a semi-arc notch and an installation hole position on the flange plate.
Finally, removing the processing burrs and the flash by a bench worker.
In addition, the turning processing of the second procedure is carried out, the turning tool is made of high-speed steel W18Cr4V, the processing performance is good, the turning tool can be continuously ground, the utilization rate is high, and the processing cost can be saved. And in the fourth procedure, turning is carried out, polycrystalline diamond PCD is selected as the material of the turning tool, the strength and the toughness are good, the impact resistance is strong, and the impact and the vibration caused by intermittent turning can be effectively improved.
Thus, as can be seen from the above embodiments, the present invention:
1. by adopting rough and fine separated processing, the processing stress can be effectively released, and the deformation of the part can be repaired.
2. Rough machining link up the recess, finish turning inner and outer circle again, can effectively solve the not good problem of cylindricity that produces owing to run through the recess and weaken the part rigidity, avoid the condition that the processing back drum is oval-shaped inside and outside.
3. The turning machining production efficiency is high, high-speed steel W18Cr4V is selected for use to the lathe tool during a rough turning, practices thrift the cutter cost, and polycrystalline diamond PCD is selected for use to the lathe tool during finish turning, can effectively improve impact and vibration that intermittent turning brought, and part surface quality is good, and size precision and cylindricity obtain guaranteeing.
4. And a heat treatment process is not arranged, so that the processing period is shortened, and the production cost is saved.
Claims (8)
1. A processing method of a slotted cylinder cavity part is characterized by comprising the following steps: the method comprises the steps of firstly carrying out rough machining of turning and milling on a metal cylindrical machining raw material, then carrying out rough machining on a through groove, and finally carrying out finish machining of turning and milling.
2. The method for processing the grooved cylindrical cavity part as claimed in claim 1, wherein: the method comprises the following steps:
feeding: the processing raw material is in a metal cylinder shape;
secondly, rough turning: reserving at least 0.5mm of allowance, firstly processing the excircle, and then processing the stepped hole;
③ rough milling: firstly, processing the outline by using an end mill with the specification of less than phi 15mm, and then processing a groove and/or a through hole;
fourthly, fine turning: machining an excircle and an end face by adopting a diamond turning tool;
fine milling: and (3) using an end mill with the specification of less than phi 15mm to sequentially process the outline, the groove and/or the through hole, the end face and the surface mounting hole.
3. The method for processing the grooved cylindrical cavity part as claimed in claim 2, wherein: in the second step and the fourth step, the processing raw materials are clamped and fixed by a three-jaw chuck.
4. The method for processing the grooved cylindrical cavity part as claimed in claim 2, wherein: in the third step and the fifth step, the processing raw materials are fixed by a clamping apparatus pressing flange plate.
5. The method for processing the grooved cylindrical cavity part as claimed in claim 2, wherein: and in the third step, a 1mm allowance is reserved.
6. The method for processing the grooved cylindrical cavity part as claimed in claim 4, wherein: and the flange plate is obtained by processing in the second step.
7. The method for processing the grooved cylindrical cavity part as claimed in claim 1, wherein: the processing raw material is obtained by removing flash and burrs after extrusion treatment.
8. The method for processing the grooved cylindrical cavity part as claimed in claim 2, wherein: in the second step, allowance is left on the single side of the diameter and the thickness of the inner circle and the outer circle.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113770663A (en) * | 2021-10-22 | 2021-12-10 | 中国航发贵州黎阳航空动力有限公司 | High-precision machining method for thin-wall shock absorber ring |
| CN114043168A (en) * | 2021-10-26 | 2022-02-15 | 河南北方红阳机电有限公司 | Machining process for thin-wall cylindrical part with boss in inner hole |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113770663A (en) * | 2021-10-22 | 2021-12-10 | 中国航发贵州黎阳航空动力有限公司 | High-precision machining method for thin-wall shock absorber ring |
| CN113770663B (en) * | 2021-10-22 | 2024-04-09 | 中国航发贵州黎阳航空动力有限公司 | High-precision machining method for thin-wall shock absorber ring |
| CN114043168A (en) * | 2021-10-26 | 2022-02-15 | 河南北方红阳机电有限公司 | Machining process for thin-wall cylindrical part with boss in inner hole |
| CN114043168B (en) * | 2021-10-26 | 2024-01-23 | 河南北方红阳机电有限公司 | Machining process for thin-wall cylindrical part with boss in inner hole |
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