CN113547361B - Thin-wall special-shaped structure friction plate machining tool, cutter and machining method - Google Patents
Thin-wall special-shaped structure friction plate machining tool, cutter and machining method Download PDFInfo
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- CN113547361B CN113547361B CN202110982578.1A CN202110982578A CN113547361B CN 113547361 B CN113547361 B CN 113547361B CN 202110982578 A CN202110982578 A CN 202110982578A CN 113547361 B CN113547361 B CN 113547361B
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- 238000000034 method Methods 0.000 title claims description 8
- 238000003754 machining Methods 0.000 title abstract description 16
- 238000005520 cutting process Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 238000003672 processing method Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 206010066054 Dysmorphism Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Abstract
The invention provides a processing tool, a cutter and a processing method for a friction plate with a thin-wall special-shaped structure, wherein the tool comprises a friction plate clamping fixture, the clamping fixture comprises a disc-shaped body, a threaded boss is arranged on the upper surface of the body, the outer diameter of the threaded boss is identical to the inner diameter of a friction plate workpiece, and the workpiece is fixed on the clamping fixture through threaded connection; the knife point of the forming tool is R0.4mm, and the included angle is 22 degrees. During machining, the workpiece is fixed by using the clamping fixture, a plurality of annular tooth grooves are machined on the workpiece by adopting a straight cutter in a layer-by-layer circulating and reciprocating mode until the bottoms of all the annular tooth grooves are machined, and then the annular tooth grooves are machined and formed by using a forming cutter in a circulating and reciprocating mode layer by layer. The invention can solve the technical problem of difficult processing of the tooth-shaped groove and deformation of the product caused by uneven clamping force, so that the product meets the requirements of size and shape and position precision, the reject ratio of the product is reduced, and the overall production efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of machining and manufacturing, and particularly relates to a large-diameter thin-wall special-shaped circular ring structure friction plate machining tool, a cutter and a machining method.
Background
The high-precision friction disk used in the friction clutch of the special vehicle is formed by mutually nesting and meshing a plurality of friction plates by virtue of a plurality of annular tooth grooves on the end surface. The diameter range of a single friction plate is 190-335 mm, the whole thickness range is 8-11 mm, the length-diameter ratio is less than 0.058, and the end faces of the friction plates are all provided with 5 annular tooth grooves which are equidistantly and concentrically distributed (the friction plates realize relative rotation by virtue of tooth groove meshing), the maximum width of each tooth groove is 1.58mm, the minimum width is 0.99mm, and the maximum depth is 2.79mm. The end surfaces of two ends of part of friction plate are provided with the tooth grooves. As shown in fig. 1.
Because the whole thickness of the friction plate is thinner, and the end face is provided with a plurality of annular tooth groove structures, the friction plate belongs to a thin-wall special-shaped structure, and is applied to a high-precision clutch transmission system, the requirements on the planeness of the end faces at two ends of the friction plate, the concentricity of the annular tooth grooves, the tooth shape precision and the like are extremely high. The friction plate is generally manufactured by the following steps: rough turning, flat grinding of two sides, semi-finish turning of two sides, heat treatment, finish grinding of two sides, finish turning of annular tooth grooves on two sides, linear cutting of internal splines and punching by a fitter.
When the annular tooth grooves on the two sides are finely turned, if a general three-jaw or four-jaw chuck is used for clamping, the clamping force is large, the point contact clamping is adopted, the radial stress of a workpiece is large, the stress is uneven, the whole thickness is easy to deform, and the planeness is out of tolerance. Because the width of the tooth slot of the friction plate is narrower, the cutting cannot be carried out when a common cutter is used for turning, a special forming cutter is required to be designed, and the forming cutter is formed by one-step machining by adopting a common turning method, a large amount of cutting heat can be generated, and the tooth slot is seriously deformed.
Disclosure of Invention
First, the technical problem to be solved
The invention provides a processing tool, a cutter and a processing method for a friction plate with a thin-wall special-shaped structure, which are used for solving the technical problems that the flatness of the friction plate is out of tolerance, an annular tooth groove cannot be processed and the annular tooth groove is easy to deform in the processing process, so that the friction plate product meets the requirements on the dimension and the shape and position precision, the reject ratio of the product is reduced, and the product quality is improved.
(II) technical scheme
In order to solve the technical problems, the invention provides a processing tool for a friction plate with a thin-wall special-shaped structure, which comprises a friction plate clamping fixture, wherein the clamping fixture comprises a disc-shaped body, a threaded boss is arranged on the upper surface of the body, the outer diameter of the threaded boss is identical to the inner diameter of a friction plate workpiece, the threaded boss is used for fixing the workpiece on the clamping fixture through threaded connection, the outer diameter of the clamping fixture is identical to the outer diameter of the workpiece, and the maximum contact area between the workpiece and the clamping fixture is ensured.
Further, a plurality of uniformly distributed U-shaped grooves are formed in the side face of the body.
In addition, the invention provides a forming cutter for processing the friction plate with the thin-wall special-shaped structure, wherein the cutter point of the forming cutter is R0.4mm, and the included angle is 22 degrees.
Further, the tool material is a monolithic cemented carbide.
In addition, the invention provides a processing method of the friction plate with the thin-wall special-shaped structure, which carries out layered processing on annular tooth grooves on two sides of a friction plate workpiece with the thin-wall special-shaped structure, and specifically comprises the following steps: firstly, fixing a workpiece by using the tool, circularly and reciprocally processing a plurality of annular tooth grooves layer by layer on the workpiece by adopting a straight cutter, namely, processing a first layer of a second groove after the first groove is processed, processing a first layer of a third groove, and so on, circularly and reciprocally processing the second layer and the third layer until the bottoms of all the annular tooth grooves are processed, and then circularly and reciprocally processing the plurality of annular tooth grooves layer by using the forming cutter.
Further, the cutting amount per layer of each annular tooth slot was 0.1mm.
(III) beneficial effects
The invention provides a processing tool, a cutter and a processing method for a friction plate with a thin-wall special-shaped structure, wherein the tool comprises a friction plate clamping fixture, the clamping fixture comprises a disc-shaped body, a threaded boss is arranged on the upper surface of the body, the outer diameter of the threaded boss is identical to the inner diameter of a friction plate workpiece, and the workpiece is fixed on the clamping fixture through threaded connection; the knife point of the forming tool is R0.4mm, and the included angle is 22 degrees. During machining, the workpiece is fixed by using the clamping fixture, a plurality of annular tooth grooves are machined on the workpiece by adopting a straight cutter in a layer-by-layer circulating and reciprocating mode until the bottoms of all the annular tooth grooves are machined, and then the annular tooth grooves are machined and formed by using a forming cutter in a circulating and reciprocating mode layer by layer. The invention can solve the technical problem of difficult processing of the tooth-shaped groove and deformation of the product caused by uneven clamping force, so that the product meets the requirements of size and shape and position precision, the reject ratio of the product is reduced, and the overall production efficiency is improved.
Drawings
FIG. 1 is a schematic view of a high-precision friction disk structure;
FIG. 2 is a schematic view of a mold according to an embodiment of the present invention;
FIG. 3 illustrates a mold in an embodiment of the present invention;
Fig. 4 is a schematic view of a forming tool according to an embodiment of the present invention, in front view, (a) a plan view, (b) a cross-sectional view of a top view, and (c) a cross-sectional view of a top view.
Detailed Description
To make the objects, contents and advantages of the present invention more apparent, the following detailed description of the present invention will be given with reference to the accompanying drawings and examples.
Because the whole thickness of the friction plate is thinner, when the traditional clamping mode adopts a three-jaw or four-jaw chuck to clamp the annular tooth grooves at the end faces of the two ends of the excircle turning friction plate, the friction plate workpiece is stressed unevenly due to the fact that the clamping force of the chuck is larger and is in point contact clamping, deformation can occur after machining, and the flatness is out of tolerance seriously. Therefore, this embodiment proposes a thin wall dysmorphism structure friction disc processing frock, and this frock includes the friction disc mould, and the structure is as shown in fig. 2, and the mould includes the disc body, and the body upper surface is provided with to be the screw boss, and screw boss external diameter is the same with friction disc work piece internal diameter for fix the work piece on the mould through threaded connection, mould external diameter is the same with the work piece external diameter, guarantees that work piece and mould area of contact is the biggest, as shown in fig. 3. Three uniformly distributed U-shaped grooves are formed in the side face of the body, and the workpiece can be conveniently disassembled after the machining is finished. The clamping stress of the clamping fixture is small, the contact area between the clamping fixture and a workpiece is large, and clamping deformation of a product can be avoided.
The application method of the mould comprises the following steps: the clamping fixture is clamped by a four-jaw single-action chuck, a workpiece is screwed on a threaded boss of the clamping fixture through threads, the workpiece is completely attached to the clamping fixture and rotates together with a main shaft, and the end face tooth groove machining or the outer diameter machining of a product is performed.
The maximum width of the annular tooth grooves on the two side end surfaces of the friction plate is 1.58mm, the maximum depth is 2.79mm, the angle of the groove is 26 degrees, and a common cutter cannot feed during turning. The invention designs a special forming cutter according to different requirements of the depth, width and angle of the workpiece material and the groove. As shown in figure 4, the cutter material is an integral hard alloy with phi 6mm, the cutter point is R0.4mm, the included angle is 22 degrees, the cutter point of the forming cutter is sharp, the processing efficiency is high, meanwhile, the cutting heat is not easy to generate, and the influence on the deformation of a product is small.
When the annular tooth slot of the friction plate is processed, the general process is to adopt a forming cutter to carry out full-cutter processing, so that the annular tooth slot is processed and formed once, the pin arrangement is easy to be unsmooth during processing due to narrow tooth slot width, a large amount of cutting heat is generated, the cutting force is large, the cutter point is severely worn, and the service life of the cutter is reduced. The invention carries out layering processing on a friction plate with a thin-wall special-shaped structure, and the method specifically comprises the following steps: firstly, fixing a workpiece by using a clamping fixture, processing 5 annular tooth grooves on the workpiece by adopting a phi 0.9mm straight cutter in a layer-by-layer circulating and reciprocating mode, wherein the cutting amount of each layer of each annular tooth groove is 0.1mm until the bottom of all annular tooth grooves is processed, and then processing and forming the 5 annular tooth grooves simultaneously by using a forming cutter in a circulating and reciprocating mode by layer mode according to the cutting amount of each layer of 0.1 mm. The machining mode of the invention has small cutting force, can improve the machining precision and the surface finish of the workpiece, and can avoid the problems of unsmooth chip removal and large cutting quantity to generate a large amount of cutting heat to cause deformation of tooth grooves.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (1)
1. The method is characterized by carrying out layered processing on annular tooth grooves on two sides of a friction plate workpiece with a thin-wall special-shaped structure, and specifically comprises the following steps: firstly, fixing a workpiece by using a tool, processing a plurality of annular tooth grooves layer by adopting a straight cutter, namely processing a first layer of a second groove after processing a first layer of a first groove, processing a first layer of a third groove, and so on, processing the second layer and the third layer in a reciprocating manner until the bottoms of all the annular tooth grooves are processed, and then processing the plurality of annular tooth grooves layer by using a forming cutter in a reciprocating manner, wherein the cutting amount of each layer of annular tooth groove is 0.1mm; wherein,
The tool comprises a friction plate clamping fixture, wherein the clamping fixture comprises a disc-shaped body, a threaded boss is arranged on the upper surface of the body, the outer diameter of the threaded boss is identical to the inner diameter of a friction plate workpiece, the tool is used for fixing the workpiece on the clamping fixture through threaded connection, the outer diameter of the clamping fixture is identical to the outer diameter of the workpiece, and the maximum contact area of the workpiece and the clamping fixture is ensured; three uniformly distributed U-shaped grooves are formed in the side face of the body;
The knife point of the forming tool is R0.4mm, and the included angle is 22 degrees; the formed cutter material is integral hard alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110982578.1A CN113547361B (en) | 2021-08-25 | Thin-wall special-shaped structure friction plate machining tool, cutter and machining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110982578.1A CN113547361B (en) | 2021-08-25 | Thin-wall special-shaped structure friction plate machining tool, cutter and machining method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113547361A CN113547361A (en) | 2021-10-26 |
| CN113547361B true CN113547361B (en) | 2024-06-11 |
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|---|---|---|---|---|
| CN102152138A (en) * | 2011-03-08 | 2011-08-17 | 哈尔滨理工大学 | Special clamp for turning titanium alloy thin-wall part with complex profile |
| CN203956124U (en) * | 2014-07-08 | 2014-11-26 | 成都美奢锐新材料有限公司 | The indexable V-knife sheet of lathe tool |
| CN104625125A (en) * | 2014-12-22 | 2015-05-20 | 贵州精立航太科技有限公司 | Stainless steel cut-off tool |
| CN205928014U (en) * | 2016-08-23 | 2017-02-08 | 济宁科尔森液压有限公司 | Disc part chuck frock |
| RU187004U1 (en) * | 2018-04-17 | 2019-02-13 | Публичное акционерное общество "Долгопрудненское научно-производственное предприятие" | DEVICE FOR CENTERING AND ATTACHING THIN-WALLED CYLINDER PARTS |
| CN111730138A (en) * | 2020-06-23 | 2020-10-02 | 贵州黎阳国际制造有限公司 | T-shaped ring groove cutting tool and cutting machining method thereof |
| CN112404462A (en) * | 2020-11-04 | 2021-02-26 | 常州机电职业技术学院 | Method for turning thin-wall steel sleeve |
| CN113245567A (en) * | 2021-06-03 | 2021-08-13 | 哈尔滨汽轮机厂有限责任公司 | Thin-wall end cover turning anti-deformation auxiliary tool and turning method |
| CN216097733U (en) * | 2021-08-25 | 2022-03-22 | 北京北方车辆集团有限公司 | Thin wall dysmorphism structure friction disc processing frock and cutter |
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102152138A (en) * | 2011-03-08 | 2011-08-17 | 哈尔滨理工大学 | Special clamp for turning titanium alloy thin-wall part with complex profile |
| CN203956124U (en) * | 2014-07-08 | 2014-11-26 | 成都美奢锐新材料有限公司 | The indexable V-knife sheet of lathe tool |
| CN104625125A (en) * | 2014-12-22 | 2015-05-20 | 贵州精立航太科技有限公司 | Stainless steel cut-off tool |
| CN205928014U (en) * | 2016-08-23 | 2017-02-08 | 济宁科尔森液压有限公司 | Disc part chuck frock |
| RU187004U1 (en) * | 2018-04-17 | 2019-02-13 | Публичное акционерное общество "Долгопрудненское научно-производственное предприятие" | DEVICE FOR CENTERING AND ATTACHING THIN-WALLED CYLINDER PARTS |
| CN111730138A (en) * | 2020-06-23 | 2020-10-02 | 贵州黎阳国际制造有限公司 | T-shaped ring groove cutting tool and cutting machining method thereof |
| CN112404462A (en) * | 2020-11-04 | 2021-02-26 | 常州机电职业技术学院 | Method for turning thin-wall steel sleeve |
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| CN216097733U (en) * | 2021-08-25 | 2022-03-22 | 北京北方车辆集团有限公司 | Thin wall dysmorphism structure friction disc processing frock and cutter |
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