CN105081714A - Processing method of clutch racks - Google Patents
Processing method of clutch racks Download PDFInfo
- Publication number
- CN105081714A CN105081714A CN201510523296.XA CN201510523296A CN105081714A CN 105081714 A CN105081714 A CN 105081714A CN 201510523296 A CN201510523296 A CN 201510523296A CN 105081714 A CN105081714 A CN 105081714A
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- China
- Prior art keywords
- grinding
- shaft
- axle
- rough turn
- rack shaft
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
The invention relates to a processing method of clutch racks. The processing method comprises the following steps: (1) selecting appropriate shaft type blank cuttings so as to obtain a shaft blank; (2) performing rough turning on the excircle of the shaft blank and the end surfaces of two ends of the shaft blank, and then boring a central hole in the end surface of each end so as to obtain a shaft rough-turning piece; (3) processing an inner assembly hole in one end of the shaft rough-turning piece; (4) processing a position pin hole; (5) performing heat treatment on the shaft rough-turning piece; (6) grinding the central holes; (7) coarsely grinding the excircle so as to obtain cutting-tooth flat portion; (8) forming teeth on the upper line of the flat portion in a cutting manner so as to obtain a course rack shaft; (9) performing semi-fine grinding on the excircle of the course rack shaft so as to obtain a semi-finely ground rack shaft; (10) finely grinding the excircle of the semi-finely ground rack shaft so as to obtain a finely ground rack shaft; (11) finely grinding the inner assembly hole; and (12) grinding the teeth: firstly, coarsely grinding the teeth, and then grinding the coarsely ground teeth so as to obtain a rack-shaft finished product. The clutch racks obtained by the processing method of clutch racks, disclosed by the invention, meet the design requirement for precision, and the processing quality of the clutch racks is improved, so that the qualification rate of products is guaranteed.
Description
Technical field
The invention belongs to tooth bar processing technique field, be specifically related to a kind of clutch tooth bar processing method.
Background technology
Traditional clutch tooth bar processing adopts the milling cutter of various criterion to carry out Milling Process to raw material, the whole profile of tooth of milling is needed in the process of carrying out milling, Cutter wear is large, will affect tooth bar machining accuracy when the cutter after wearing and tearing to a certain degree continues manufacturing gear strip.Heat-treating in process to tooth bar, usually first carry out mill teeth to heat-treat again, although this processing method reaches the requirement of tooth bar integral hardness, but the profile of tooth after heat treatment changes greatly, cylindrical flexural deformation is large, profile of tooth and outer circles lower, the precision of traditional Milling Process profile of tooth is difficult to reach dimensional requirement usually, crudy is not high, and production efficiency is low, and product rejection rate is high.Therefore, a kind of clutch tooth bar processing method of research and development is further needed to solve above problem.
Summary of the invention
The object of this invention is to provide a kind of clutch tooth bar processing method, the clutch tooth bar that the method obtains meets accuracy Design requirement, ensures the crudy of clutch tooth bar, improves the qualification rate of product.
The object of the invention is to realize by the following technical solutions, the invention provides a kind of clutch tooth bar processing method, comprise the following steps:
(1), choose the blanking of matched axle class blank, obtain the axis blank part that length is 200mm;
(2), rough turn axis blank part cylindrical and two ends end face, and leave surplus, obtain rough turn of axle, make the length of rough turn of described axle be 186.5mm, outside diameter is the cylindrical of φ 16mm and φ 14mm two sections, φ 16mm is 10.5mm in axle rough turn its length of one end; Then at the end face centering at axle rough turn two ends;
(3), clamp axis rough turn diameter is φ 14mm end, in rough turn of axle, the assembling endoporus that length is 22mm is processed to axle rough turn diameter phi 16mm end face, the internal diameter of ecto-entad is followed successively by the assembling endoporus of φ 12mm, φ 11mm, φ 10mm, and leaves allowance;
(4), diameter be φ 14mm axis body part process cutting profile of tooth dowel hole;
(5), rough turn of axle is quenched and annealing in process;
(6), grinding center hole;
(7), roughly grind cylindrical, with distance axle rough turn diameter phi 16mm end face 62.5mm place for original position, grind the flat position of cutting;
(8), according to the parameter of tooth, reach the standard grade in flat position and cut out eight profiles of tooth, and leave surplus, obtain the thick part of rack shaft;
(9), half fine cylindrical, obtain rack shaft and partly refine part;
(10), fine cylindrical, make the outside diameter of rack shaft half fine grinding part reach the margin of tolerance, obtain rack shaft fine grinding part;
(11), finish turning assembling endoporus, and car goes out the card circular groove of internal diameter φ 12.8mm in the endoporus of φ 12mm, and card circular groove groove width is 0.9mm, and the initiating terminal of card circular groove and the end face distance of diameter phi 16mm are 1.6mm;
(12), roll flute, with hydraulically operated fixture clamping two pieces rack shaft fine grinding part, by the profile of tooth on emery wheel first preliminary grinding two pieces rack shaft fine grinding part, then emery wheel is revised, makes emery wheel flour milling smooth, then finishing grinding tooth, obtain the rack shaft of finished product.
Owing to have employed technique scheme, the advantage that the present invention has: first rough turn of axle to be quenched and annealing in process reaches the hardness requirement of clutch tooth bar, then on rough turn of axle, profile of tooth correspondence position roughly grinds out the flat position of processing, reduce profile of tooth cutting quantity, on flat position, Linear cut is utilized to go out profile of tooth again, the clutch tooth bar that the method obtains meets accuracy Design requirement, improves the crudy of clutch tooth bar, ensure that the qualification rate of product.
Accompanying drawing explanation
Fig. 1 is the clutch tooth bar structural representation adopting the present invention's processing.
Detailed description of the invention
The technological means realized to make the present invention, creation characteristic, reach object and effect clearly and be easy to understand, below in conjunction with the drawings and specific embodiments, the present invention is further elaborated:
A kind of clutch tooth bar processing method, tooth bar profile of tooth hardness to be processed is 28 ~ 40HRC, and the parameter of tooth bar is: number of teeth z=8, modulus m=2, pressure angle a=20 °, modification coefficient x=0, addendum coefficient ha=1, and bottom clearance c=0.25, comprises the following steps:
(1), choose the blanking of matched axle class blank, obtain the axis blank part that length is 200mm;
(2), rough turn axis blank part cylindrical and two ends end face, and leave surplus, obtain rough turn of axle, make the length of rough turn of described axle be 186.5mm, outside diameter is the cylindrical of φ 16mm and φ 14mm two sections, φ 16mm is 10.5mm in axle rough turn its length of one end; Then at the end face centering at axle rough turn two ends;
(3), clamp axis rough turn diameter is φ 14mm end, in rough turn of axle, the assembling endoporus that length is 22mm is processed to axle rough turn diameter phi 16mm end face, the internal diameter of ecto-entad is followed successively by the assembling endoporus of φ 12mm, φ 11mm, φ 10mm, length is followed successively by 7.7mm, 1mm, 13.3mm, and leaves allowance;
(4), be the dowel hole that φ 14mm axis body part processes cutting profile of tooth at diameter, the center of circle of described pin-and-hole and the end face distance of diameter phi 16mm are 67.5mm, so that the tooth Profile Machining position of accurate positioning clutch tooth bar;
(5), to rough turn of axle quench and annealing in process, Quenching Treatment rear axle rough turn hardness is 45 ~ 52HRC, and annealing in process rear axle rough turn hardness is 28 ~ 40HRC, reaches the hardness requirement of clutch tooth bar;
(6), grinding center hole;
(7), cylindrical is roughly ground, with distance axle rough turn diameter
end face 62.5mm place is original position, grinds the flat position of cutting, and the length of flat position is 72mm, reduces profile of tooth cutting quantity, facilitates follow-up linear cutter;
(8), according to the parameter of tooth, reach the standard grade in flat position and cut out eight profiles of tooth, and leave surplus, obtain the thick part of rack shaft;
(9), half fine cylindrical, obtain rack shaft and partly refine part;
(10), fine cylindrical, make the outside diameter of rack shaft half fine grinding part reach the margin of tolerance, obtain rack shaft fine grinding part;
(11), finish turning assembling endoporus, and car goes out the card circular groove of internal diameter φ 12.8mm in the assembling endoporus of φ 12mm, and card circular groove groove width is 0.9mm, and the initiating terminal of card circular groove and the end face distance of diameter phi 16mm are 1.6mm;
(12), roll flute, with hydraulically operated fixture clamping two pieces rack shaft fine grinding part, by the profile of tooth on emery wheel first preliminary grinding rack shaft fine grinding part, then emery wheel is revised, makes emery wheel flour milling smooth, then finishing grinding tooth, obtain the rack shaft of finished product.
Because centre bore is easily out of shape or centre bore of damaging after heat treatment, cause positioning precision poor, grinding center hole is in order to ensure positioning precision, adopt dowel hole to determine the position of tooth, ensure that the tooth position of every part product is identical, by Linear cut tooth, once can cut the tooth on four workpiece, significantly improve working (machining) efficiency, even if the cylindrical of each workpiece has the distortion of trace, can distortion be eliminated finally by half fine grinding and precision grinding process.
Claims (1)
1. a clutch tooth bar processing method, is characterized in that comprising the following steps:
(1) choose the blanking of matched axle class blank, obtain the axis blank part that length is 200mm;
(2) rough turn axis blank part cylindrical and two ends end face, and leave surplus, obtain rough turn of axle, make the length of rough turn of described axle be 186.5mm, outside diameter is the cylindrical of φ 16mm and φ 14mm two sections, φ 16mm is 10.5mm in axle rough turn its length of one end; Then at the end face centering at axle rough turn two ends;
(3) clamp axis rough turn diameter is φ 14mm end, in rough turn of axle, the assembling endoporus that length is 22mm is processed to axle rough turn diameter phi 16mm end face, the internal diameter of ecto-entad is followed successively by the assembling endoporus of φ 12mm, φ 11mm, φ 10mm, and leaves allowance;
(4) diameter be φ 14mm axis body part process cutting profile of tooth dowel hole;
(5) rough turn of axle is quenched and annealing in process;
(6) grinding center hole;
(7) roughly grind cylindrical, with distance axle rough turn diameter phi 16mm end face 62.5mm place for original position, grind the flat position of cutting;
(8) according to the parameter of tooth, reach the standard grade in flat position and cut out eight profiles of tooth, and leave surplus, obtain the thick part of rack shaft;
(9) half fine cylindricals, obtain rack shaft and partly refine part;
(10) fine cylindrical, makes the outside diameter of rack shaft half fine grinding part reach the margin of tolerance, obtains rack shaft fine grinding part;
(11) finish turning assembling endoporus, and car goes out the card circular groove of internal diameter φ 12.8mm in the endoporus of φ 12mm, card circular groove groove width is 0.9mm, and the initiating terminal of card circular groove and the end face distance of diameter phi 16mm are 1.6mm;
(12) roll flute, with hydraulically operated fixture clamping two pieces rack shaft fine grinding part, by the profile of tooth on emery wheel first preliminary grinding two pieces rack shaft fine grinding part, then revises emery wheel, makes emery wheel flour milling smooth, then finishing grinding tooth, obtains the rack shaft of finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510523296.XA CN105081714A (en) | 2015-08-24 | 2015-08-24 | Processing method of clutch racks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510523296.XA CN105081714A (en) | 2015-08-24 | 2015-08-24 | Processing method of clutch racks |
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| Publication Number | Publication Date |
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| CN105081714A true CN105081714A (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510523296.XA Pending CN105081714A (en) | 2015-08-24 | 2015-08-24 | Processing method of clutch racks |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111604654A (en) * | 2020-01-15 | 2020-09-01 | 上海第一机床厂有限公司 | Machining method of transfer rack transmission mechanism in nuclear fuel reactor |
-
2015
- 2015-08-24 CN CN201510523296.XA patent/CN105081714A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111604654A (en) * | 2020-01-15 | 2020-09-01 | 上海第一机床厂有限公司 | Machining method of transfer rack transmission mechanism in nuclear fuel reactor |
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Application publication date: 20151125 |