CN116833483A - Piston pin machining device and process - Google Patents
Piston pin machining device and process Download PDFInfo
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- CN116833483A CN116833483A CN202310936576.8A CN202310936576A CN116833483A CN 116833483 A CN116833483 A CN 116833483A CN 202310936576 A CN202310936576 A CN 202310936576A CN 116833483 A CN116833483 A CN 116833483A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
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Abstract
本发明提供了一种活塞销加工装置及工艺，涉及内燃机活塞销技术领域。本发明的活塞销加工装置，包括上模板、上模座、上冲头承压件、上冲头、挤光刀、下模板、下模座、下冲头承压件、回刀仓和凹模；所述上模板和所述下模板相互靠近时，挤光刀先穿过凹模限位口内活塞销的内孔，挤光刀再依次穿过回刀口和进刀口后落至回刀仓的中空腔体。本发明的活塞销加工装置及工艺，在活塞销的内孔完成粗镗加工后，在粗镗的基础上通过挤光刀穿过活塞销的内孔进行挤光加工，挤光加工后的活塞销内孔表面粗糙度低，加工质量显著提高，防止内孔表面出现开裂失效；整个挤光过程操作简单，加工难度低，有效提高了对活塞销内孔的加工效率。
The invention provides a piston pin processing device and technology, and relates to the technical field of internal combustion engine piston pins. The piston pin processing device of the present invention includes an upper template, an upper die base, an upper punch pressure-bearing part, an upper punch, an extruding knife, a lower template, a lower die base, a lower punch pressure-bearing part, a return knife bin and a concave die ; When the upper template and the lower template are close to each other, the squeeze knife first passes through the inner hole of the piston pin in the limit opening of the die, and then the squeeze knife passes through the return knife edge and the knife inlet in sequence and then falls into the hollow cavity of the return knife bin. body. In the piston pin processing device and process of the present invention, after the inner hole of the piston pin is rough-bored, an extruding knife is passed through the inner hole of the piston pin to perform extrusion processing on the basis of rough boring. The piston pin after extrusion processing The surface roughness of the inner hole is low, the processing quality is significantly improved, and cracking and failure of the inner hole surface are prevented; the entire extrusion process is simple to operate and has low processing difficulty, which effectively improves the processing efficiency of the piston pin inner hole.
Description
Technical Field
The invention relates to the technical field of piston pins of internal combustion engines, in particular to a piston pin processing device and a piston pin processing technology.
Background
With the continuous upgrading of national emission regulations and the continuous improvement of the power demands of the market on the internal combustion engine, the high-strength diesel engine with the characteristic of high power density has become one of the important development directions of the internal combustion engine industry. The continuous improvement of the strengthening degree of the diesel engine shows continuous increase of the explosion pressure and the power, and further continuous increase of the mechanical load and the thermal load of the engine, which brings great challenges to the reliability of parts. The piston pin is used as a key part for connecting the piston and the connecting rod, the pressure generated by the combustion and expansion of the mixed gas received by the piston is transmitted to the connecting rod, and the output of the engine power is realized through the crankshaft and the flywheel. The piston pin bears high temperature, high pressure and alternating load in the working of the engine, and the working environment is very bad, so that the structural design, strength, performance and machining precision of the piston pin have very important influence on the reliability and service life of the whole engine.
The machining and manufacturing of the piston pin of the diesel engine is mainly divided into three parts of blank manufacturing, machining and heat treatment, and the inner hole of the piston pin is usually finished by adopting the working procedures of drilling, rough boring and finish boring in sequence; the inner hole of the piston pin is generally smaller, and a longer boring bar is required for processing the whole inner hole of the piston pin during boring, so that the inner hole is extremely easy to generate serious vibration lines due to the large length-diameter ratio of the boring bar; if the turning processing is adopted, clamping non-concentricity is very easy to occur during secondary clamping, and obvious tool joint marks can be generated in the inner hole. All of the above conditions can lead to unqualified quality of the inner hole of the piston pin. In addition, the boring process is divided into rough boring and fine boring processes, the processing difficulty is high, the processing time of a single piston pin is long, the tool changing times are high, the surface roughness of an inner hole is high, the inner hole stress is easy to be high, and fatigue fracture failure is easy to occur in the operation process.
Disclosure of Invention
The invention aims to provide a piston pin machining device and a piston pin machining process, which sequentially adopt rough boring and burnishing procedures, so that the machining efficiency of an inner hole of a piston pin and the surface machining quality of the inner hole are improved.
In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:
a piston pin processing device comprises an upper die plate, an upper die base, an upper punch pressure-bearing piece, an upper punch, a polishing cutter, a lower die plate, a lower die base, a lower punch pressure-bearing piece, a cutter return bin and a female die;
the lower end of the upper die plate is provided with an upper die seat, the lower end of the upper die seat is connected with the upper punch through the upper punch pressure-bearing piece, the upper punch is arranged along the vertical direction, and the tail end of the upper punch is detachably connected with the burnishing cutter;
the lower die plate is positioned below the upper die plate, the upper end of the lower die plate is provided with the lower die base, and the upper end of the lower die base is sequentially connected with the cutter returning bin and the female die from bottom to top through the lower punch pressure-bearing piece;
the upper end face of the female die is provided with a limiting opening for containing the piston pin and limiting the piston pin along the vertical direction, the lower end face of the female die is provided with a return edge for the passage of a polishing cutter along the vertical direction, the return edge is communicated with the limiting opening, and a supporting table for supporting the piston pin is arranged between the edge of the return edge and the edge of the limiting opening;
the inner part of the cutter return bin is a hollow cavity, the upper end of the cutter return bin is provided with a cutter inlet communicated with the hollow cavity, and the cutter inlet is communicated with the cutter return edge;
when the upper die plate and the lower die plate are close to each other, the extruding cutter passes through the inner hole of the piston pin in the limit opening of the female die, and then sequentially passes through the return edge and the feed opening and then falls into the hollow cavity of the return edge bin.
Preferably, the die further comprises a jacking seat and a thimble, wherein the jacking seat is in sliding connection with the lower punch pressure-bearing piece along the vertical direction, the thimble is arranged on the jacking seat, the thimble is arranged along the vertical direction, the thimble sequentially slides through the cutter return bin and the die, and the tail end of the thimble can be abutted against the lower end face of the piston pin.
Preferably, a first guide post is arranged on the lower punch pressure bearing piece along the vertical direction, a guide hole is formed in the jacking seat along the vertical direction, and the first guide post is matched with the guide hole.
Preferably, the device further comprises a push rod, wherein the push rod slides through the lower punch pressure bearing piece, and the tail end of the push rod can be abutted against the lower end face of the jacking seat.
Preferably, the upper punch pressure-bearing member comprises an upper bearing plate, an upper base plate and a punch seat, wherein the upper bearing plate, the upper base plate and the punch seat are arranged on the upper die seat in a sequentially stacked mode from top to bottom, the upper end face of the upper bearing plate is abutted to the upper die plate, and the lower end of the punch seat is connected with the upper punch.
Preferably, the upper punch pressure bearing piece further comprises a seat sleeve arranged on the upper die base, and the punch base is nested in the seat sleeve.
Preferably, the lower punch pressure-bearing member comprises a lower pressure-bearing seat, a lower cushion sleeve and a supporting sleeve which are arranged on the lower die holder and are sequentially overlapped from bottom to top, the lower end face of the lower pressure-bearing seat is abutted to the lower die plate, and the upper end of the supporting sleeve is connected with the cutter return bin.
Preferably, the die further comprises a guide sleeve and a guide pillar, wherein the guide sleeve is arranged on the upper die holder, the guide sleeve is arranged along the vertical direction, the guide pillar is arranged on the lower die holder, the guide pillar is arranged along the vertical direction, and the guide pillar is in sliding fit in the guide sleeve.
Preferably, one side of the cutter return bin is provided with a cutter outlet communicated with the hollow cavity.
The piston pin machining process, which is applied to the piston pin machining device, comprises the following steps:
step 1, placing a piston pin with a rough-bored inner hole in a limit port of a female die;
step 2, the upper template and the lower template are mutually close to each other for a set distance, so that a tool bit of the extruding tool is abutted against the upper end of an inner hole of the piston pin;
step 3, the upper template and the lower template are continuously mutually close, the extruding cutter firstly passes through the inner hole of the piston pin, and then sequentially passes through the return edge and the feed port and then falls into the hollow cavity of the return edge bin;
and 4, the upper die plate and the lower die plate are mutually far away from each other and reset, the jacking seat moves upwards under the action of external force, and the ejector pin ejects out the piston pin in the limit opening of the female die.
The beneficial technical effects of the invention are as follows:
after the inner hole of the piston pin is subjected to rough boring, the piston pin processing device and the process are applied to carry out burnishing processing by penetrating through the inner hole of the piston pin through a burnishing cutter on the basis of rough boring, the surface roughness of the inner hole of the piston pin after the burnishing processing is low, the processing quality is obviously improved, and the surface of the inner hole is prevented from cracking and losing efficacy; the whole burnishing process is simple to operate and low in processing difficulty, and the processing efficiency of the inner hole of the piston pin is effectively improved.
Drawings
FIG. 1 is a cross-sectional view of a wrist pin processing apparatus according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a female die in a wrist pin processing apparatus according to an embodiment of the present invention.
Detailed Description
The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantageous effects of the present invention more apparent. Some embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments are shown. Indeed, various embodiments of the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "inner", "outer", "upper", "lower", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In an embodiment of the present invention, a piston pin processing device and a process are provided, please refer to fig. 1 and 2.
A piston pin machining device comprises an upper die plate 11, an upper die base 12, an upper punch bearing part, an upper punch 13, a burnishing cutter 2, a lower die plate 31, a lower die base 32, a lower punch bearing part, a cutter return bin 33 and a female die 34.
The lower extreme of cope match-plate pattern 11 sets up upper die base 12, and upper die base 12's lower extreme is connected upper punch 13 through upper punch pressure-bearing piece, and upper punch 13 arranges along vertical direction, and the end of upper punch 13 can dismantle and connect extrusion cutter 2. The tail end of the upper punch 13 is provided with a limiting pin, the upper end of the burnishing cutter 2 is provided with a limiting hole, and the limiting pin is inserted into the limiting hole so as to realize the detachable connection between the tail end of the upper punch 13 and the burnishing cutter 2; after the burnishing cutter 2 passes through the inner hole of the piston pin 4, the burnishing cutter 2 is dropped into the hollow cavity of the cutter back chamber 33 by the gravity of the burnishing cutter.
The lower die plate 31 is positioned below the upper die plate 11, the upper end of the lower die plate 31 is provided with a lower die holder 32, and the upper end of the lower die holder 32 is sequentially connected with a cutter return bin 33 and a female die 34 from bottom to top through a lower punch pressure-bearing piece.
The upper end surface of the female die 34 is provided with a limiting opening 341 along the vertical direction, and the limiting opening 341 is used for accommodating the piston pin 4 and limiting the piston pin 4. The lower end surface of the female die 34 is provided with a return edge 342 along the vertical direction, and the return edge 342 is used for the extruding cutter 2 to pass through after passing through the inner hole of the piston pin 4. The return edge 342 is coaxially arranged with the limit opening 341, the return edge 342 is communicated with the limit opening 341, a supporting table 343 is arranged between the edge of the return edge 342 and the edge of the limit opening 341, and the supporting table 343 is used for supporting the piston pin 4.
The interior of the cutter return bin 33 is a hollow cavity, the upper end of the cutter return bin 33 is provided with a cutter inlet communicated with the hollow cavity, and a cutter inlet is communicated with a cutter return 342.
The upper die plate 11 is used for connecting hydraulic equipment, and the upper die plate 11 is driven by the hydraulic equipment to approach or separate from the lower die plate 31.
When the upper template 11 and the lower template 31 are close to each other, the burnishing cutter 2 firstly passes through the inner hole of the piston pin 4 in the limit opening 341 of the female die 34, and then the burnishing cutter 2 sequentially passes through the return edge 342 and the feed opening and falls into the hollow cavity of the return cutter bin 33.
The bottom surface of the hollow cavity of the cutter return bin 33 is an inclined surface, one side of the cutter return bin 33 is provided with a cutter outlet communicated with the hollow cavity, and the cutter outlet is positioned at the lower end of the inclined surface. After the extruding cutter 2 falls into the hollow cavity of the cutter returning bin 33, the extruding cutter slides to the cutter outlet along the inclined plane, so that the recycling of the extruding cutter 2 is facilitated.
The upper punch pressure-bearing piece is arranged on the upper die holder 12, and comprises an upper bearing plate 51, an upper base plate 52 and a punch seat 53 which are sequentially arranged in a stacking manner from top to bottom, the upper end face of the upper bearing plate 51 is abutted against the upper die plate 11, the lower end of the punch seat 53 is provided with an assembly groove, and the upper end of the upper punch 13 is matched in the assembly groove. The upper end surface of the upper bearing plate 51 is abutted against the upper die plate 11, so that the acting force applied by the upper die plate 11 is transmitted to the upper punch 13 and the burnishing cutter 2 through the upper bearing plate 51, the upper backing plate 52 and the punch holder 53.
Wherein, the upper end face of the upper die holder 12 is provided with a step-shaped upper assembly notch, the upper assembly notch penetrates through the upper die holder 12, the upper bearing plate 51 is assembled at the upper end of the upper assembly notch, the upper bearing plate 51 is abutted against the step of the upper assembly notch, the punch seat 53 is positioned at the lower end face of the upper die holder 12, and the upper bearing plate 51, the upper base plate 52 and the punch seat 53 are connected through a plurality of bolts. By adjusting the connection tightening degree of the bolts, the orientation of the punch holder 53 can be finely adjusted so that the punch holder 53 is arranged in the vertical direction. The upper pad 52 is a wear part, and the upper pad 52 can be replaced after being deformed by compression in long-term use.
The upper punch press further comprises a seat sleeve 54 arranged on the upper die base 12, and the punch seat 53 is nested inside the seat sleeve 54. The punch seat 53 is limited by the seat sleeve 54, so that the punch seat 53 is arranged along the vertical direction, and the burnishing cutter 2 and the inner hole of the piston pin 4 are coaxially arranged.
The lower punch pressure-bearing piece is arranged on the lower die holder 32, and comprises a lower pressure-bearing seat 61, a lower cushion cover 62 and a supporting sleeve 63 which are sequentially arranged in a stacked manner from bottom to top, the lower end face of the lower pressure-bearing seat 61 is abutted against the lower die plate 31, and the upper end of the supporting sleeve 63 is connected with the cutter return bin 33 through a cutter return bin backing plate 64.
Wherein, the lower end face of the lower die holder 32 is provided with a lower assembly notch in a step shape, the lower assembly notch penetrates through the lower die holder 32, the lower pressure bearing seat 61 is assembled at the lower end of the lower assembly notch, the lower pressure bearing seat 61 is abutted against the step of the lower assembly notch, the lower cushion cover 62 and the support cover 63 are sequentially nested in the lower assembly notch, and the lower pressure bearing seat 61, the lower cushion cover 62 and the support cover 63 are connected through a plurality of bolts. By adjusting the connection tightening degree of the bolts, the orientation of the supporting sleeve 63 can be finely adjusted, so that the inner hole of the piston pin 4 on the female die 34 and the burnishing cutter 2 are coaxially arranged.
The jacking seat 71 is slidably connected with the lower punch pressure bearing part along the vertical direction, wherein a first guide post 72 is arranged at the upper end of the lower pressure bearing seat 61 along the vertical direction, a guide hole is formed in the jacking seat 71 along the vertical direction, and the first guide post 72 is matched with the guide hole. Four ejector pins 73 are arranged at the upper end of the jacking seat 71, the ejector pins 73 are arranged along the vertical direction, the ejector pins 73 sequentially slide through the cutter returning bin 33 and the female die 34, and the tail ends of the ejector pins 73 can be abutted against the lower end face of the piston pin 4. The lifting seat 71 slides upwards along the first guide post 72 to drive the ejector pin 73 to lift the piston pin 4, so that the piston pin 4 is lifted out of the limit opening 341.
Wherein, the first guiding post 72 and the lifting seat 71 are both located inside the supporting sleeve 63, so that the overall structure of the device is more compact.
The push rod 74 slides through the lower die plate 31 first, then through the lower punch pressure-receiving member (lower pressure-receiving seat 61), and the tip end of the push rod 74 can abut against the lower end face of the jacking seat 71. The push rod 74 is moved upward to drive the jacking seat 71 to slide upward along the first guide post 72.
The lower terminal surface of upper die base 12 sets up an assembly section of thick bamboo, and guide pin bushing 81 is spacing and the assembly of upper block 91 is connected to in the upper assembly section of thick bamboo, and guide pin bushing 81 arranges along vertical direction, and the up end of die holder 32 sets up a lower assembly section of thick bamboo, and guide pillar 82 is spacing and the assembly is connected to in the lower assembly section of thick bamboo through lower block 92, and guide pillar 82 arranges along vertical direction, and guide pillar 82 sliding fit is in guide pin bushing 81. The guide pillar 82 and the guide sleeve 81 are in sliding fit, so that the upper die plate and the lower die plate are guided close to each other, and the centering accuracy of the inner holes of the extruding cutter 2 and the piston pin 4 is improved.
The piston pin machining process, to which the piston pin machining device of the embodiment is applied, comprises the following steps:
step 1, placing a piston pin 4 with a rough-bored inner hole in a limit opening 341 of a female die 34;
step 2, the upper template 11 and the lower template 31 are mutually close to each other for a set distance, so that the tool bit of the extruding tool 2 is abutted against the upper end of the inner hole of the piston pin 4;
step 3, the upper template 11 and the lower template 31 are continuously close to each other, the burnishing cutter 2 firstly passes through the inner hole of the piston pin 4, and then the burnishing cutter 2 sequentially passes through the return edge 342 and the feed port and then falls into the hollow cavity of the return cutter bin 33;
and 4, the upper template 11 and the lower template 31 are mutually far away from each other and reset, the jacking seat 71 moves upwards under the pushing of the push rod 74, and the ejector pin 73 ejects the piston pin 4 in the limit opening 341 of the female die 34.
The present embodiment has been described in detail with reference to the accompanying drawings. The piston pin machining apparatus and process of the present invention should be clearly recognized by those skilled in the art in light of the foregoing description. According to the piston pin machining device and the piston pin machining process, after the inner hole of the piston pin is subjected to rough boring, the burnishing cutter 2 penetrates through the inner hole of the piston pin 4 on the basis of rough boring to carry out burnishing, the surface roughness of the inner hole of the piston pin 4 after burnishing is low, the machining quality is remarkably improved, and cracking failure of the surface of the inner hole is prevented; the whole burnishing process is simple to operate and low in processing difficulty, and the processing efficiency of the inner hole of the piston pin 4 is effectively improved.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (10)
1. A wrist pin processing apparatus, characterized in that: the die comprises an upper die plate, an upper die base, an upper punch pressure-bearing piece, an upper punch, a polishing cutter, a lower die plate, a lower die base, a lower punch pressure-bearing piece, a cutter return bin and a female die;
the lower end of the upper die plate is provided with an upper die seat, the lower end of the upper die seat is connected with the upper punch through the upper punch pressure-bearing piece, the upper punch is arranged along the vertical direction, and the tail end of the upper punch is detachably connected with the burnishing cutter;
the lower die plate is positioned below the upper die plate, the upper end of the lower die plate is provided with the lower die base, and the upper end of the lower die base is sequentially connected with the cutter returning bin and the female die from bottom to top through the lower punch pressure-bearing piece;
the upper end face of the female die is provided with a limiting opening for containing the piston pin and limiting the piston pin along the vertical direction, the lower end face of the female die is provided with a return edge for the passage of a polishing cutter along the vertical direction, the return edge is communicated with the limiting opening, and a supporting table for supporting the piston pin is arranged between the edge of the return edge and the edge of the limiting opening;
the inner part of the cutter return bin is a hollow cavity, the upper end of the cutter return bin is provided with a cutter inlet communicated with the hollow cavity, and the cutter inlet is communicated with the cutter return edge;
when the upper die plate and the lower die plate are close to each other, the extruding cutter passes through the inner hole of the piston pin in the limit opening of the female die, and then sequentially passes through the return edge and the feed opening and then falls into the hollow cavity of the return edge bin.
2. A wrist pin processing apparatus according to claim 1, wherein:
the die pressing device comprises a lower punch pressure bearing piece, and is characterized by further comprising a jacking seat and a thimble, wherein the jacking seat is connected with the lower punch pressure bearing piece in a sliding mode along the vertical direction, the thimble is arranged on the jacking seat and sequentially penetrates through the cutter returning bin and the die in a sliding mode along the vertical direction, and the tail end of the thimble can be abutted to the lower end face of the piston pin.
3. A wrist pin processing apparatus according to claim 2, wherein:
the lower punch pressure bearing piece is provided with a first guide column along the vertical direction, the jacking seat is provided with a guide hole along the vertical direction, and the first guide column is matched with the guide hole.
4. A wrist pin machining apparatus according to claim 2 or 3, wherein:
the lower punch press is characterized by further comprising a push rod, the push rod slides through the lower punch press bearing piece, and the tail end of the push rod can be abutted against the lower end face of the jacking seat.
5. A wrist pin processing apparatus according to claim 1, wherein:
the upper punch pressure-bearing member comprises an upper pressure-bearing plate, an upper base plate and a punch seat, wherein the upper pressure-bearing plate, the upper base plate and the punch seat are arranged on the upper die seat in a sequentially stacked mode from top to bottom, the upper end face of the upper pressure-bearing plate is abutted to the upper die plate, and the lower end of the punch seat is connected with the upper punch.
6. A wrist pin processing apparatus according to claim 5, wherein:
the upper punch pressure bearing piece further comprises a seat sleeve arranged on the upper die base, and the punch seat is nested in the seat sleeve.
7. A wrist pin processing apparatus according to claim 1, wherein:
the lower punch pressure-bearing piece comprises a lower pressure-bearing seat, a lower cushion sleeve and a supporting sleeve which are arranged on a lower die holder and are sequentially overlapped from bottom to top, the lower end face of the lower pressure-bearing seat is abutted to the lower die plate, and the upper end of the supporting sleeve is connected with the cutter return bin.
8. A wrist pin processing apparatus according to claim 1, wherein:
the guide sleeve is arranged on the upper die holder, the guide sleeve is arranged along the vertical direction, the guide post is arranged on the lower die holder, the guide post is arranged along the vertical direction, and the guide post is in sliding fit in the guide sleeve.
9. A wrist pin processing apparatus according to claim 1, wherein:
one side of the cutter return bin is provided with a cutter outlet communicated with the hollow cavity.
10. A piston pin machining process, applying the piston pin machining device according to any one of claims 1 to 9, characterized by comprising the steps of:
step 1, placing a piston pin with a rough-bored inner hole in a limit port of a female die;
step 2, the upper template and the lower template are mutually close to each other for a set distance, so that a tool bit of the extruding tool is abutted against the upper end of an inner hole of the piston pin;
step 3, the upper template and the lower template are continuously mutually close, the extruding cutter firstly passes through the inner hole of the piston pin, and then sequentially passes through the return edge and the feed port and then falls into the hollow cavity of the return edge bin;
and 4, the upper die plate and the lower die plate are mutually far away from each other and reset, the jacking seat moves upwards under the action of external force, and the ejector pin ejects out the piston pin in the limit opening of the female die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310936576.8A CN116833483B (en) | 2023-07-27 | 2023-07-27 | Piston pin machining device and process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310936576.8A CN116833483B (en) | 2023-07-27 | 2023-07-27 | Piston pin machining device and process |
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| CN116833483A true CN116833483A (en) | 2023-10-03 |
| CN116833483B CN116833483B (en) | 2026-02-10 |
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| CN204799694U (en) * | 2015-03-27 | 2015-11-25 | 株洲湘火炬机械制造有限责任公司 | Cold crowded straight hole drift of piston pin |
| CN215786510U (en) * | 2021-08-02 | 2022-02-11 | 广东庆昇科技有限公司 | Crowded mesopore nailing mould structure of china department part that car loudspeaker were used |
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2023
- 2023-07-27 CN CN202310936576.8A patent/CN116833483B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080047125A1 (en) * | 2006-08-11 | 2008-02-28 | Burgess-Norton Mfg. Co., Inc. | Method for forming tapered piston pins |
| CN201693111U (en) * | 2010-02-11 | 2011-01-05 | 浙江三和机电科技有限公司 | Cold heading die for stamping piston pin |
| CN101837383A (en) * | 2010-06-04 | 2010-09-22 | 宁波轴瓦厂 | Squeezing device for continuous rapid shaping burnishing sleeve |
| CN201744551U (en) * | 2010-08-19 | 2011-02-16 | 成都华川电装有限责任公司 | Tubular part inner circle burnishing former |
| CN204799694U (en) * | 2015-03-27 | 2015-11-25 | 株洲湘火炬机械制造有限责任公司 | Cold crowded straight hole drift of piston pin |
| CN215786510U (en) * | 2021-08-02 | 2022-02-11 | 广东庆昇科技有限公司 | Crowded mesopore nailing mould structure of china department part that car loudspeaker were used |
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| CN116833483B (en) | 2026-02-10 |
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