CN204799694U - Cold crowded straight hole drift of piston pin - Google Patents
Cold crowded straight hole drift of piston pin Download PDFInfo
- Publication number
- CN204799694U CN204799694U CN201520180500.8U CN201520180500U CN204799694U CN 204799694 U CN204799694 U CN 204799694U CN 201520180500 U CN201520180500 U CN 201520180500U CN 204799694 U CN204799694 U CN 204799694U
- Authority
- CN
- China
- Prior art keywords
- burnishing
- band
- level
- piston pin
- straight hole
- Prior art date
- 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.)
- Expired - Fee Related
Links
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model relates to a cold crowded straight hole drift of piston pin, including connector, guide pillar, work tape and direction head, the work tape is located between guide pillar and the direction head, one -level burnishing area, second grade burnishing area and tertiary burnishing area that even spacing distribution and width are the same set gradually on the work tape, the big 0.15mm of one -level burnishing area diameter ratio product blank hole, 0.15mm is brought up to second grade burnishing area diameter ratio one -level burnishing, 0.07mm is brought up to tertiary burnishing area diameter ratio second grade burnishing. The utility model discloses simple structure, wear -resisting, convenient to use, long service life make the drift carry out the cubic burnishing to the work piece in the course of the work, consequently work piece the hole roughness <= ra3.2 after the completion, and work piece hole size is decided by third level work tape size, therefore work piece completion back hole size uniformity is good.
Description
Technical field
The utility model relates to piston pin processing method technical field, particularly a kind of cold-extruded straight hole drift of straight hole piston pin.
Background technology
Piston pin is used for connecting piston and connecting rod, and the power of being born by piston passes to connecting rod or contrary.Piston pin bears very large periodic shock load under the high temperature conditions, and due to piston pin pendulum angle in pin-and-hole little, be difficult to form lubricating oil film, therefore lubricating condition is poor.Piston pin and pin-and-hole should have suitable fit clearance and good surface quality for this reason.
Increasing piston pin adopts straight hole structure at present, and General Requirements hole size tolerance is 0.2mm, endoporus roughness≤Ra5, and this straight hole piston pin demand is large.It generally adopts the processing method of ball finishing, steel ball is plain bearing steel ball, material is Gr15, after processing, hardness is HRC58-62, surface roughness is Ra0.1, and process is: add cutter bore hole on lathe by alloy machine after workpiece being drilled through endoporus and adopt the ball finishing straight hole of corresponding size size to obtain satisfactory hole size and roughness again.
Adopt the pin-and-hole of method machining piston pin of ball finishing to there is following shortcoming: 1) hole size towards processed products and roughness requirements higher, this technology can only improve size and surface accuracy in respective degrees; Such as: after burnishing-in, product requirement hole size is ∮ 14 ± 0.1mm, roughness is Ra3.2, then select ball size to be ∮ 14+0.050mm, before burnishing-in, blank need control at hole size is that ∮ 14-0.1-0.2mm(i.e. ball finishing allowance are at about 0.2mm), roughness < Ra6.3 just can complete; 2) work strip of steel ball is short for narrow service life, and namely each steel ball can only be scrapped because product can not be made qualified for surface abrasion the product of burnishing-in about 500.
Utility model content
The utility model provides a kind of machining piston pin pin-and-hole piston pin cold-extruded straight hole drift that can reduce production cost and enhance productivity for solving in known technology the technical problem that exists.
The technical scheme that the utility model is taked for the technical problem existed in solution known technology is: a kind of piston pin cold-extruded straight hole drift, comprise connector, guide pillar, work strip and guide head, described work strip is between guide pillar and guide head, described work strip is disposed with equidistantly distribution and the identical one-level burnishing-in band of width, secondary burnishing-in band and three grades of burnishing-in bands, described one-level burnishing-in band diameter 0.15mm larger than product blanking inner hole, described secondary burnishing-in band diameter 0.15mm larger than one-level burnishing-in band, described three grades of burnishing-in band diameters 0.07mm larger than secondary burnishing-in band.
Described one-level burnishing-in band, between secondary burnishing-in band and three grades of burnishing-in bands at a distance of 10mm.
The width of described one-level burnishing-in band, secondary burnishing-in band and three grades of burnishing-in bands is 1.2mm.
The length of described guide head is 20mm.
Described guide head is tapering 15
ofrustum cone structure.
The transition guide head of frustum cone structure is provided with between described one-level burnishing-in band and guide head.
The tapering of described transition guide head is 3
o.
Between described one-level burnishing-in band and secondary burnishing-in band and be provided with the structure be made up of the large round platform of shared minimum diameter and little round platform between secondary burnishing-in band and three grades of burnishing-in bands, this large round platform lays respectively at the front of three grades of burnishing-in bands and secondary burnishing-in band, this little round platform lays respectively at the rear of one-level burnishing-in band and secondary burnishing-in band, and wherein the tapering of large round platform is 3
o, the tapering of little round platform is 7 °.
Also be provided with transition round platform between described three grades of burnishing-in bands and guide pillar, the tapering of described transition round platform is 4 °.
The advantage that the utility model has and good effect are: 1. the utility model makes drift carry out three burnishing-ins to workpiece in the course of the work, therefore the inner hole of workpiece roughness≤Ra3.2 after completion, inner hole of workpiece size is determined by third level work strip size, and therefore after workpiece completion, hole size uniformity is good; 2, to the not requirement completely of product blank system, namely the conventional machining processes precision that can reach just; 3, the utility model structure is simple, and processing and fabricating is convenient, wear-resisting, and its service life is machining piston pin pin-and-hole more than 50,000, is longer than the service life of steel ball far away.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is Fig. 1 I enlarged drawing.
In Fig. 1 and Fig. 2: 1. guide head, 2. transition guide head, 3. one-level burnishing-in band, 4. secondary burnishing-in band, 5. three grades of burnishing-in bands, 6. large round platform, 7. little round platform, 8. transition round platform, 9. guide pillar, 10. connector.
Detailed description of the invention
For summary of the invention of the present utility model, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows.
Refer to Fig. 1 and Fig. 2, a kind of piston pin cold-extruded straight hole drift, comprise connector 10, guide pillar 9, work strip and guide head 1, guide head 1 is length 10mm, tapering 15
ofrustum cone structure, can increase work efficiency better, work strip is disposed with from front to back equidistantly distribution and identical one-level burnishing-in band 3, secondary burnishing-in band 4 and the three grades of burnishing-in bands 5 of width, in order to strengthen the intensity of drift, between one-level burnishing-in band 3 and guide head 1, be provided with the transition guide head 2 of frustum cone structure, the tapering of transition guide head 2 is 3
o.One-level burnishing-in band 3 diameter 0.15mm larger than product blanking inner hole, secondary burnishing-in band 4 diameter 0.15mm larger than one-level burnishing-in band 3, three grades of burnishing-in band diameter 0.07mms larger than secondary burnishing-in band.
Preferably, one-level burnishing-in band 3, between secondary burnishing-in band 4 and three grades of burnishing-in bands 5 at a distance of 10mm, can increase work efficiency better.
Preferably, the width of one-level burnishing-in band 3, secondary burnishing-in band 4 and three grades of burnishing-in bands 5 is 1.2mm, can extend its service life better.
Between one-level burnishing-in band 3 and secondary burnishing-in band 4 and be provided with the structure be made up of the large round platform 6 of shared minimum diameter and little round platform 7 between secondary burnishing-in band 4 and three grades of burnishing-in bands 5, this large round platform 6 lays respectively at the front of three grades of burnishing-in bands 5 and secondary burnishing-in band 4, this little round platform lays respectively at the rear of one-level burnishing-in band 3 and secondary burnishing-in band 4, and wherein the tapering of large round platform is 3
o, the tapering of little round platform is 7 °.
Also be provided with transition round platform between three grades of burnishing-in bands and guide pillar, the tapering of transition round platform is 4 °.
Above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, and those of ordinary skill in the field should be appreciated that and still can modify to the detailed description of the invention of utility model or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the technology of the utility model request protection.
Claims (9)
1. a piston pin cold-extruded straight hole drift, comprise connector, guide pillar, work strip and guide head, described work strip is between guide pillar and guide head, it is characterized in that, described work strip is disposed with equidistantly distribution and identical one-level burnishing-in band, secondary burnishing-in band and the three grades of burnishing-in bands of width, described one-level burnishing-in band diameter 0.15mm larger than product blanking inner hole, described secondary burnishing-in band diameter 0.15mm larger than one-level burnishing-in band, described three grades of burnishing-in band diameters 0.07mm larger than secondary burnishing-in band.
2. piston pin cold-extruded straight hole drift according to claim 1, is characterized in that, described one-level burnishing-in band, between secondary burnishing-in band and three grades of burnishing-in bands at a distance of 10mm.
3. piston pin cold-extruded straight hole drift according to claim 1 and 2, is characterized in that, the width of described one-level burnishing-in band, secondary burnishing-in band and three grades of burnishing-in bands is 1.2mm.
4. piston pin cold-extruded straight hole drift according to claim 1, is characterized in that, the length of described guide head is 20mm.
5. the piston pin cold-extruded straight hole drift according to claim 1 or 4, is characterized in that, described guide head is the frustum cone structure of tapering 15 °.
6. piston pin cold-extruded straight hole drift according to claim 1, is characterized in that, be provided with the transition guide head of frustum cone structure between described one-level burnishing-in band and guide head.
7. piston pin cold-extruded straight hole drift according to claim 6, is characterized in that, the tapering of described transition guide head is 3 °.
8. piston pin cold-extruded straight hole drift according to claim 1, it is characterized in that, between described one-level burnishing-in band and secondary burnishing-in band and be provided with the structure be made up of the large round platform of shared minimum diameter and little round platform between secondary burnishing-in band and three grades of burnishing-in bands, this large round platform lays respectively at the front of three grades of burnishing-in bands and secondary burnishing-in band, this little round platform lays respectively at the rear of one-level burnishing-in band and secondary burnishing-in band, wherein the tapering of large round platform is 3 °, and the tapering of little round platform is 7 °.
9. piston pin cold-extruded straight hole drift according to claim 1, is characterized in that, is also provided with transition round platform between described three grades of burnishing-in bands and guide pillar, and the tapering of described transition round platform is 4 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520180500.8U CN204799694U (en) | 2015-03-27 | 2015-03-27 | Cold crowded straight hole drift of piston pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520180500.8U CN204799694U (en) | 2015-03-27 | 2015-03-27 | Cold crowded straight hole drift of piston pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204799694U true CN204799694U (en) | 2015-11-25 |
Family
ID=54584585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520180500.8U Expired - Fee Related CN204799694U (en) | 2015-03-27 | 2015-03-27 | Cold crowded straight hole drift of piston pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204799694U (en) |
-
2015
- 2015-03-27 CN CN201520180500.8U patent/CN204799694U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103586652A (en) | Process for machining male and female dies | |
| CN104295608B (en) | Ring processing method in oscillating bearing | |
| CN103934638B (en) | A kind of accurate external splines pipe manufacturing process | |
| CN104439931A (en) | Round pocket hole bearing retainer machining process | |
| CN204108351U (en) | Three lobe separate type expanders | |
| CN102601402A (en) | Floating boring head for processing inner surface of bent tube billets | |
| CN104175128A (en) | Die machining process | |
| CN204799694U (en) | Cold crowded straight hole drift of piston pin | |
| CN104999224A (en) | Production method for rod end joint bearing of high-precision metal basal body | |
| CN204620651U (en) | A kind of wire rod rolling line anti-scratch that is used for turns to rolling conduit ferrule | |
| CN102581372A (en) | Hole machining push-type broach group and hole structure machining method | |
| CN110193577A (en) | Overcome the hard pipe joint cold heading technique that easily deformation occurs | |
| CN204397886U (en) | A kind of scribing tooling | |
| CN105522346A (en) | Super-finishing machining method for inner holes of outer cylinder work-pieces | |
| CN104907594A (en) | Trivalve separate expander | |
| CN204450214U (en) | The spherical adjustable measuring probe of a kind of roll grinder | |
| CN109092916A (en) | Hardly possible deformation high alloy high-precision section material production technology and special-shaped microfilament production line | |
| CN203401388U (en) | Grinding rods of cold heading steel female dies for earring type bolts | |
| CN204523975U (en) | A kind of drift of super thick mild steel punch die | |
| CN205309401U (en) | Nonstandard drill bit | |
| CN103934625B (en) | The piston rod mosaic technology of a kind of jack and column | |
| CN205600226U (en) | Burnishing -in instrument | |
| CN110434571A (en) | The processing method of cylinder inner bore | |
| RU134087U1 (en) | STEEL MONOLITHIC SELF-INSTALLING FRAME FOR PIPE DRAWING | |
| CN202479530U (en) | Floating boring head for processing internal surface of swan-neck pipe billet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151125 Termination date: 20180327 |