CN111001999A - Machining method for gear shaft of automobile - Google Patents
Machining method for gear shaft of automobile Download PDFInfo
- Publication number
- CN111001999A CN111001999A CN201911267183.2A CN201911267183A CN111001999A CN 111001999 A CN111001999 A CN 111001999A CN 201911267183 A CN201911267183 A CN 201911267183A CN 111001999 A CN111001999 A CN 111001999A
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- base material
- gear shaft
- extruding
- intermediate product
- processing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/50—Other automobile vehicle parts, i.e. manufactured in assembly lines
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- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The application relates to a method for machining a gear shaft of an automobile. The application provides a method for processing a gear shaft of an automobile, which comprises the following steps: manufacturing a base material with a required length; extruding inner holes from two end faces of the base material, and extruding a middle flange of the base material through a cold header to obtain an intermediate product; and upsetting the middle flange of the intermediate product into a tooth shape through a cold header to obtain the required gear shaft. The machining method of the gear shaft of the automobile has the advantage of high machining efficiency.
Description
Technical Field
The present invention relates to a method for machining a shaft, and more particularly to a method for machining a gear shaft of an automobile.
Background
At present, the processing technology of the automobile gear shaft in the automobile industry is not mature, and the structure of the gear shaft has the following characteristics: 1. the shape is special, and the middle part is provided with a hole; 2. the middle part of the part is provided with a flange, and the flange is provided with a ring of teeth; 3. the gear profile is not milled subsequently due to the circle of teeth on the middle flange. Due to the characteristics of the automobile gear shaft, in order to ensure that the size of the tooth profile is controlled within the design range, the gear shaft is processed by a numerical control CNC machine tool in the prior art, and in order to ensure the processing precision, complicated processing steps and long processing time are needed, so that the processing efficiency is low.
Disclosure of Invention
Based on this, the present application aims to provide a method for machining a gear shaft of an automobile, which has the advantages of high machining efficiency and ensuring machining precision.
One aspect of the present application provides a method of processing a gear shaft of an automobile, including the steps of:
manufacturing a base material with a required length;
extruding inner holes from two end faces of the base material, and extruding a middle flange of the base material through a cold header to obtain an intermediate product;
and upsetting the middle flange of the intermediate product into a tooth shape through a cold header to obtain the required gear shaft.
The application discloses a processing method of gear shaft of car, through cold-heading processing, directly upset out the product, processing consuming time is few, the process is simple to machining efficiency has been improved. And each processing procedure is carried out at an independent processing station, and can be simultaneously and continuously processed, so that the high-efficiency processing is ensured, and the efficiency is greatly improved compared with the processing method in the prior art. Meanwhile, by adopting the processing method, the processing quality of the product can be ensured.
Further, after the step of upsetting the middle flange of the intermediate product into a tooth shape by the cold header, the method further comprises the steps of: and opening the inner holes at the two ends of the intermediate product to enable the two inner holes to be communicated.
Further, after the inner holes at the two ends of the intermediate product are punched, the method also comprises the following steps: and removing redundant waste materials, and cutting redundant rim charge by using a cold header.
Further, after the excess waste materials are removed, the method further comprises the following steps: and removing redundant materials at two ends of the intermediate product and the inner hole by milling.
Further, before the manufacturing of the base material with the required length, the method comprises the following steps: straightening the parent metal by using a straightening wheel, and conveying the parent metal to any station by using a feeding wheel.
Further, the extruding the inner holes at both end surfaces of the base material includes: firstly, one inner hole is extruded from the first end face of the base material, the base material is conveyed to another station through a manipulator, and then another inner hole is extruded from the second end face of the base material.
Further, the extruding the inner holes on the two end faces of the base material further comprises: and pressing an outer chamfer on the second end face, then pressing an inner chamfer of the inner hole, and simultaneously pressing an outer chamfer of the first end face.
Further, the extruding the inner holes on the two end faces of the base material further comprises: and pressing positioning holes on two end surfaces of the base material.
Further, the extruding the inner holes on the two end faces of the base material further comprises: and before pressing the positioning hole, pressing an inner chamfer of the inner hole and an outer chamfer of the first end face.
Further, the upsetting the middle flange of the intermediate product into a tooth shape by a cold header comprises: and extruding the middle flange of the intermediate product by a cold header to form a tooth shape, and reserving a thin-wall material pressing flowing die-closing edge between any two teeth.
For a better understanding and practice, the present application is described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a method of machining a gear shaft of an exemplary automobile of the present application;
fig. 2 is a flowchart of various processing procedures of a method for processing a gear shaft of an automobile according to an exemplary embodiment of the present invention.
Detailed Description
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the present application. In the description of the present application, "a plurality" means two or more unless otherwise specified.
The cold heading process is one of the few non-cutting metal pressure working processes, and is a working method which utilizes the plastic deformation produced by metal under the action of external force and redistributes and transfers the volume of the metal by means of a die so as to form the required part or blank. The cold heading process is most suitable for producing standard fasteners such as bolts, screws, nuts, rivets, pins, and the like.
FIG. 1 is a schematic view of a method of machining a gear shaft of an exemplary automobile of the present application; fig. 2 is a flowchart of various processing procedures of a method for processing a gear shaft of an automobile according to an exemplary embodiment of the present invention. Referring to fig. 1 and 2, a method for machining a gear shaft of an automobile according to the present application includes the steps of:
and S10, manufacturing a base material with a required length. In some preferred embodiments, cutting a desired length of a parent material to obtain a parent material product having a first end face and a second end face; and the processed base material is conveyed into the die of the first station through a manipulator.
With reference to fig. 2, S20, inner holes are extruded from both end surfaces of the base material, and a middle flange of the base material is extruded through a cold heading machine to obtain an intermediate product.
In some preferred embodiments, said extruding the inner holes from both end faces of the parent material comprises: firstly, one inner hole is extruded from the first end face of the base material, the base material is conveyed to another station through a manipulator, and then another inner hole is extruded from the second end face of the base material.
In some preferred embodiments, said extruding the two end faces of the parent material into the inner bore further comprises: and pressing an outer chamfer on the second end face, then pressing an inner chamfer of the inner hole, and simultaneously pressing an outer chamfer of the first end face.
In some preferred embodiments, said extruding the two end faces of the parent material into the inner bore further comprises: and pressing positioning holes on two end surfaces of the base material. In the second product of fig. 2, the positioning hole of the base material, and the inner chamfer and the inclined surface of the first end surface are pressed.
In some preferred embodiments, said extruding the two end faces of the parent material into the inner bore further comprises: and before pressing the positioning hole, pressing an inner chamfer of the inner hole and an outer chamfer of the first end face.
And S30, upsetting the middle flange of the intermediate product into a tooth shape through a cold header to obtain the required gear shaft.
In some preferred embodiments, the upsetting the middle flange of the intermediate product with a cold header comprises: and extruding the middle flange of the intermediate product by a cold header to form a tooth shape, and reserving a thin-wall material pressing flowing die-closing edge between any two teeth.
In some preferred embodiments, further comprising the step of: and S40, opening the inner holes at the two ends of the intermediate product to enable the two inner holes to be communicated.
In some preferred embodiments, further comprising the step of: and S50, removing redundant waste materials, and cutting redundant rim charge by using a cold header.
In some preferred embodiments, further comprising the step of: and S60, removing the redundant materials at the two ends of the intermediate product and the inner hole through milling.
In some preferred embodiments, before the manufacturing of the desired length of the parent material, the method comprises the steps of: and S01, straightening the parent metal by using a straightening wheel, and conveying the parent metal to any station through a feeding wheel.
In some preferred embodiments, before the manufacturing of the desired length of the parent material, the method comprises the steps of: and S02, calculating the forming size, the machining precision and the size matching corresponding to each station die in order to ensure the fullness degree and the size requirement of the tooth form of the product.
In an exemplary method for processing a gear shaft of an automobile, in conjunction with fig. 2, the step S20 includes:
s21, conveying the base material to a mould of a first station through a manipulator, pressing an inner hole chamfer and an inner hole inclined plane on a first end face, and pressing an outer chamfer and an inner hole inclined plane on a second end face;
s22, overturning and transporting to a second station through a manipulator, upsetting an inner hole on the first end face through a cold header, and extruding a chamfer and a positioning hole on the second end face;
s23, transferring the product in the S22 to a third station through a manipulator, and extruding an inner hole on the second end face;
s24, translating the product in the step S23 to a fourth station through a manipulator, extruding and forming an intermediate flange through a cold header, and meanwhile, keeping a certain thickness between the two inner holes to prevent penetration;
s25, translating the product at the fourth station to the fifth station through a manipulator, extruding the product at an intermediate flange to form a tooth shape, and leaving a thin pressure flow die-closing edge in the middle of the tooth shape, wherein the thickness of the pressure flow die-closing edge is 0.8-1.6 mm;
s26, translating the product at the fifth station to a sixth station through a manipulator, and removing the material in the middle of the inner holes of the product through a drawing and polishing punch rod to ensure that the two inner holes are communicated and form a through hole; and cutting off the pressure flow matched die by using the edge cutting function of the cold header.
And S27, removing redundant materials in the length direction of the inner hole and the two end face rod parts of the product of the S26 through CNC machining. Of course, this step can be replaced by other mechanical machining methods to remove excess material, thereby ensuring greater precision of the machining.
This application utilizes the cold heading machine to product extrusion moulding, has realized the direct cold heading shaping of gear shaft profile of tooth, has broken through the restriction to the gear shaft shape and size, has reduced and has processed the profile of tooth, has promoted the diversification of reducing gear box tooth axle spare. The process is formed on the cold header at one time, the production efficiency is high, and the process error is effectively reduced.
This application breaks through the general processing technology of product of former reducing gear box gear shaft through the extrusion to the wire rod, and the profile of tooth of processing in the past uses CNC lathe processing, and machining efficiency is slow, and is with high costs. The product with a circle of gears and inner holes on the periphery can be directly manufactured by a cold header without the processing procedure of a tooth profile, so that the production efficiency is improved. The limitation on the shape and the size of the gear shaft piece is broken through, and the diversification of the gear shaft piece is promoted.
In addition, the method and the device overcome errors generated by machining by calculating the forming size, machining precision and size matching of the die before machining in detail; in step S25, it is critical that a mold clamping gap of 0.8 to 1.6mm be left when the tooth profile is mold-clamped, so as to prevent the mold from being seized.
Besides, except for the main forming die, all the required processing dies such as a material clamp, scissors, a shearing die, a feeding wheel, an indexing wheel and the like are designed according to the shape and the size of the product, so that the product can be smoothly extruded and formed step by step from the initial blank state, and the production stability is ensured.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.
Claims (10)
1. A method for processing a gear shaft of an automobile is characterized by comprising the following steps:
manufacturing a base material with a required length;
extruding inner holes from two end faces of the base material, and extruding a middle flange of the base material through a cold header to obtain an intermediate product;
and upsetting the middle flange of the intermediate product into a tooth shape through a cold header to obtain the required gear shaft.
2. The machining method of a gear shaft for an automobile according to claim 1, further comprising, after the step of upsetting the middle flange of the intermediate product into a tooth shape by a cold heading machine, the steps of: and opening the inner holes at the two ends of the intermediate product to enable the two inner holes to be communicated.
3. The method for machining an automotive gear shaft according to claim 2, wherein after the inner holes at both ends of the intermediate product are punched through, the method further comprises the steps of: and removing redundant waste materials, and cutting redundant rim charge by using a cold header.
4. The method for processing an automotive gear shaft according to claim 3, further comprising the step of, after removing the unnecessary scraps: and removing redundant materials at two ends of the intermediate product and the inner hole by milling.
5. The method for processing an automotive gear shaft according to any one of claims 1 to 4, characterized by comprising, before producing a base material of a desired length, the steps of: straightening the parent metal by using a straightening wheel, and conveying the parent metal to any station by using a feeding wheel.
6. The method for processing an automobile gear shaft according to claim 5, wherein the extruding the inner holes from both end surfaces of the base material includes: firstly, one inner hole is extruded from the first end face of the base material, the base material is conveyed to another station through a manipulator, and then another inner hole is extruded from the second end face of the base material.
7. The method for processing an automobile gear shaft according to claim 6, wherein the extruding the inner holes from both end surfaces of the base material further comprises: and pressing an outer chamfer on the second end face, then pressing an inner chamfer of the inner hole, and simultaneously pressing an outer chamfer of the first end face.
8. The method for processing an automobile gear shaft according to claim 7, wherein the extruding the inner holes from both end surfaces of the base material further comprises: and pressing positioning holes on two end surfaces of the base material.
9. The method of claim 8, wherein the extruding the inner holes from the two end surfaces of the base material further comprises: and before pressing the positioning hole, pressing an inner chamfer of the inner hole and an outer chamfer of the first end face.
10. The method of processing an automobile gear shaft according to claim 5, wherein the upsetting the middle flange of the intermediate product with a tooth shape by a cold heading machine comprises: and extruding the middle flange of the intermediate product by a cold header to form a tooth shape, and reserving a thin-wall material pressing flowing die-closing edge between any two teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911267183.2A CN111001999A (en) | 2019-12-11 | 2019-12-11 | Machining method for gear shaft of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911267183.2A CN111001999A (en) | 2019-12-11 | 2019-12-11 | Machining method for gear shaft of automobile |
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| Publication Number | Publication Date |
|---|---|
| CN111001999A true CN111001999A (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911267183.2A Pending CN111001999A (en) | 2019-12-11 | 2019-12-11 | Machining method for gear shaft of automobile |
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| CN (1) | CN111001999A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111791034A (en) * | 2020-08-11 | 2020-10-20 | 无锡市宏英达机械配件有限公司 | Gear pump and automobile power steering pump gear blank and forming processing technology |
| CN112091549A (en) * | 2020-09-16 | 2020-12-18 | 太仓鸿瑞金属制品有限公司 | Method for forming square hole on nonstandard gear |
| CN112171188A (en) * | 2020-09-17 | 2021-01-05 | 王颜琦 | Manufacturing process of speed measuring rotor |
| CN112658182A (en) * | 2020-09-25 | 2021-04-16 | 宁波振华汽车零部件有限公司 | Cold heading forming process of toothed dehydration shaft |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62168627A (en) * | 1986-01-20 | 1987-07-24 | Yamaha Motor Co Ltd | Manufacture of gear shaft |
| CN101342566A (en) * | 2008-08-25 | 2009-01-14 | 江苏创一精锻有限公司 | Integral cold forging process for bevel gear shaft |
| CN101618421A (en) * | 2009-07-17 | 2010-01-06 | 宁波安拓实业有限公司 | Multi-station cold-heading molding method of clutch conical blank |
| CN109226654A (en) * | 2018-10-26 | 2019-01-18 | 广州小出钢管有限公司 | A kind of processing method of the automobile shock flat recess with tooth pipe |
| CN109695623A (en) * | 2019-02-01 | 2019-04-30 | 河南科技大学 | A kind of integral light-weight quantization gear shaft and its manufacturing process |
-
2019
- 2019-12-11 CN CN201911267183.2A patent/CN111001999A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62168627A (en) * | 1986-01-20 | 1987-07-24 | Yamaha Motor Co Ltd | Manufacture of gear shaft |
| CN101342566A (en) * | 2008-08-25 | 2009-01-14 | 江苏创一精锻有限公司 | Integral cold forging process for bevel gear shaft |
| CN101618421A (en) * | 2009-07-17 | 2010-01-06 | 宁波安拓实业有限公司 | Multi-station cold-heading molding method of clutch conical blank |
| CN109226654A (en) * | 2018-10-26 | 2019-01-18 | 广州小出钢管有限公司 | A kind of processing method of the automobile shock flat recess with tooth pipe |
| CN109695623A (en) * | 2019-02-01 | 2019-04-30 | 河南科技大学 | A kind of integral light-weight quantization gear shaft and its manufacturing process |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111791034A (en) * | 2020-08-11 | 2020-10-20 | 无锡市宏英达机械配件有限公司 | Gear pump and automobile power steering pump gear blank and forming processing technology |
| CN112091549A (en) * | 2020-09-16 | 2020-12-18 | 太仓鸿瑞金属制品有限公司 | Method for forming square hole on nonstandard gear |
| CN112171188A (en) * | 2020-09-17 | 2021-01-05 | 王颜琦 | Manufacturing process of speed measuring rotor |
| CN112658182A (en) * | 2020-09-25 | 2021-04-16 | 宁波振华汽车零部件有限公司 | Cold heading forming process of toothed dehydration shaft |
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Application publication date: 20200414 |
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