CN112372245A - Punching process and punching equipment for main shaft connecting rod - Google Patents
Punching process and punching equipment for main shaft connecting rod Download PDFInfo
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- CN112372245A CN112372245A CN202011206523.3A CN202011206523A CN112372245A CN 112372245 A CN112372245 A CN 112372245A CN 202011206523 A CN202011206523 A CN 202011206523A CN 112372245 A CN112372245 A CN 112372245A
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- punching
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- shaped groove
- punched
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- 238000004080 punching Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000001788 irregular Effects 0.000 claims abstract description 10
- 238000000227 grinding Methods 0.000 claims abstract description 7
- 238000010791 quenching Methods 0.000 claims abstract description 7
- 230000000171 quenching effect Effects 0.000 claims abstract description 7
- 238000003754 machining Methods 0.000 claims abstract description 6
- 238000003801 milling Methods 0.000 claims abstract description 4
- 238000005496 tempering Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 23
- 238000009958 sewing Methods 0.000 description 9
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/02—Constructions of connecting-rods with constant length
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drilling And Boring (AREA)
Abstract
The invention discloses a punching process of a main shaft connecting rod, which specifically comprises the following steps: s1, obtaining a workpiece blank and finishing the rough machining size; s2, milling a V-shaped groove on the central boundary line of the inner hole to be punched, wherein the V-shaped groove extends along the direction of the central boundary line, and meanwhile, the punching starting point is ensured to be positioned in the extending direction of the V-shaped groove; s3, quenching; s4, placing the quenched workpiece into a fixing clamp in a punching device to clamp the workpiece, ensuring that the workpiece needs to be punched and the surface containing the V-shaped groove is opposite to a punching tool of the punching device, and then punching the workpiece, wherein the punching surface generates an irregular surface; s5, locking the two semi-circles of the punched product through screws, ensuring that the two semi-circles are always spliced together, and finely grinding the inner hole of the punched part and the upper and lower end faces of the product; the invention also discloses a punching device; the invention ensures the precision of the round hole after being disassembled and assembled for many times, improves the working efficiency and reduces the production cost.
Description
Technical Field
The invention relates to the technical field of a punching process and punching equipment of a main shaft connecting rod, which are applied to accessories of an industrial sewing machine, in particular to the punching process and the punching equipment of the main shaft connecting rod.
Background
Industrial sewing machines (industrial sewing machines) are sewing machines suitable for sewing workpieces for mass production in sewing plants or other industrial sectors. Industrial sewing machines are used in factories where sewing machines are required for clothes, shoes, hats, and the like.
One of the most important accessories in an industrial sewing machine is a main shaft connecting rod which comprises a shaft mounting round hole, the shaft mounting round hole is generally divided into two accessories in the later period for convenient mounting, two sides of the shaft mounting round hole are fixed through screws, and then later period assembly is carried out The processing technology is complex, so how to ensure that the product can be cut off quickly when being processed, ensure the contact ratio of two cross sections after later splicing when being cut off, and avoid the dislocation problem is very important.
Disclosure of Invention
The invention aims to provide a punching process and punching equipment for a spindle connecting rod, and aims to solve the problems of long processing time, low processing efficiency, complex processing process and easy dislocation of two spliced cross section products in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a punching process of a main shaft connecting rod specifically comprises the following steps:
s1, obtaining a workpiece blank and finishing the rough machining size;
s2, milling a V-shaped groove with the width of 1mm on the central boundary line of the inner hole to be punched, wherein the V-shaped groove extends along the direction of the central boundary line, and meanwhile, the punching starting point is ensured to be positioned in the extending direction of the V-shaped groove;
s3, quenching the workpiece processed in the step S2, hardening and tempering the surface hardness of the workpiece to Hv within the range of 600-800 by using a multifunctional quenching furnace, and controlling the hardening depth within the range of 0.2-0.3mm to finally form a hardening layer of 0.2-0.3 mm;
s4, placing the quenched workpiece into a fixed clamp in a punching device to clamp the workpiece, ensuring that the workpiece needs to be punched and the surface containing the V-shaped groove is opposite to a punching tool of the punching device, and simultaneously ensuring that the target section of the workpiece is overlapped with the edge of the fixed clamp; then starting a hydraulic machine with 100 tons of force to press the workpiece downwards to realize impact fracture, wherein the impact fracture surface generates an irregular surface;
and S5, locking the two semicircles of the punched product through screws, ensuring that the two semicircles are always spliced together according to the tight joint of the irregular section, and finely grinding the inner hole of the punched part and the upper and lower end surfaces of the product by adopting a fine grinding mode to eliminate the deformation generated by punching so as to achieve the necessary precision of the finished product.
Further, in step S2, the included angle α of the V-shaped groove is 60 °.
Further, the locking of the two semicircles in step S5 is achieved by locking the two punched semicircles with a 35-kilogram-force locking screw.
The invention also discloses a punching device used in the punching process of the spindle connecting rod, the punching device comprises a fixed table, and the fixed table is provided with the following components:
the fixing clamp is used for clamping a workpiece, a clamping opening used for clamping one end of a product is formed in the fixing clamp, an opening of the clamping opening is located on the right side face of the fixing clamp, the right side of the lower bottom face of the opening extends outwards to form an extending table, and the right side face of the extending table is located right opposite to the groove bottom of a V-shaped groove of the product;
a die-cutting tool, said die-cutting tool comprising a hydraulic press and a die-cutting bit; the output of hydraulic press is connected with die-cut tool bit, just the below of die-cut tool bit is just to the tank bottom in V type groove, die-cut tool bit 7 is rectangle rule tool bit.
According to the punching process and the punching equipment for the main shaft connecting rod, the cross section of the product blank is an irregular surface in a mode of quickly punching, the goodness of fit during later splicing is higher than that of sawing in the prior art, then inner holes are processed alternately, meanwhile, the time required by quickly punching is only about 10 seconds, the processing efficiency is shortened, the cross section does not need to be processed, the cost is reduced by more than 90%, the goodness of fit of two hemispheres is close to one hundred percent, the roundness of the inner holes is still as long as possible after the finished product is loosened and locked by screws, dislocation is avoided, the lowest noise of a product assembly is finally ensured, the service life is prolonged by 4-5 times, generally 8-10 years, the service life is finally prolonged, and meanwhile, the whole process is simple to process.
Drawings
Fig. 1 is a schematic structural flow chart of a front surface of a product of a punching process of a spindle connecting rod in the embodiment 1;
FIG. 2 is a schematic side view of a product blank with a V-shaped groove 4;
fig. 3 is a schematic structural view of a punching apparatus used in a punching process of a spindle connecting rod in embodiment 1.
In the figure: the device comprises a fixed clamp 1, a clamping opening 2, an extension table 3, a V-shaped groove 4, an opening 2-1, a punching tool 5, a hydraulic press 6, a punching cutter head 7 and a fixed table 9.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
referring to fig. 1 and 2, the present embodiment provides a process for punching a connecting rod of a spindle, which includes the following steps:
s1, obtaining a workpiece blank and finishing the rough machining size;
s2, milling a V-shaped groove with the width of 1mm on the central boundary line of the inner hole to be punched, wherein the V-shaped groove extends along the direction of the central boundary line, and meanwhile, the punching starting point is ensured to be positioned in the extending direction of the V-shaped groove;
s3, quenching the workpiece processed in the step S2, hardening and tempering the surface hardness of the workpiece to Hv within the range of 600-800 by using a multifunctional quenching furnace, and controlling the hardening depth within the range of 0.2-0.3mm to finally form a hardening layer of 0.2-0.3 mm;
s4, placing the quenched workpiece into a fixed clamp in a punching device to clamp the workpiece, ensuring that the workpiece needs to be punched and the surface containing the V-shaped groove 4 is opposite to a punching tool of the punching device, and ensuring that the target section of the workpiece is overlapped with the edge of the fixed clamp; then starting a hydraulic machine with 100 tons of force to press the workpiece downwards to realize impact fracture, wherein the impact fracture surface generates an irregular surface;
and S5, locking the two semicircles of the punched product through screws, ensuring that the two semicircles are always spliced together according to the tight joint of the irregular section, and finely grinding the inner hole of the punched part and the upper and lower end surfaces of the product by adopting a fine grinding mode to eliminate the deformation generated by punching so as to achieve the necessary precision of the finished product.
Further, in step S2, the included angle α of the V-shaped groove 4 is 60 °.
Further, the locking of the semicircles in step S5 is performed by applying a force of 35 kg from the non-punched surface to the punched surface to secure the semicircles in a clamped manner.
According to the invention, the cross section is an irregular surface formed by quickly punching the product blank, so that the goodness of fit during later splicing is higher than that of sawing in the prior art, then the inner hole is finely machined, meanwhile, the time required by quickly punching is only about 10 seconds, the machining efficiency is improved, meanwhile, the cross section does not need to be reprocessed, the cost is reduced by more than 90%, the goodness of fit of two hemispheres is nearly one hundred percent, after the finished product is loosened and locked by a screw, the roundness of the inner hole is still and can not generate dislocation, the noise of a product assembly is finally ensured to be lowest, the service life is prolonged by 4-5 times, generally 8-10 years, the service life is finally prolonged, and meanwhile, the whole process is simple to machine.
Referring to fig. 3, the embodiment further discloses a punching device used in the punching process of the spindle connecting rod, the punching device includes a fixing table 9, and the fixing table 9 is provided with the following components:
the fixing clamp comprises a fixing clamp 1 for clamping a workpiece, wherein a clamping port 2 for clamping one end of a product is arranged on the fixing clamp 1, an opening 2-1 of the clamping port 2 is positioned on the right side surface of the fixing clamp 1, the right side of the lower bottom surface of the opening 2-1 extends outwards to form an extension table 3, and the right side surface of the extension table 3 is positioned right opposite to the bottom of a V-shaped groove 4 of the product;
a punching tool 5, wherein the punching tool 5 comprises a hydraulic press 6 and a punching cutter head 7; the output of hydraulic press 6 is connected with die-cut tool bit 7, just die-cut tool bit 7's below is just to the tank bottom in V type groove 4, die-cut tool bit 7 is rectangle rule tool bit.
Meanwhile, in the embodiment, the two semicircles are locked by applying 35 kg of force to the punched section from the non-punched section through screws on two sides so as to ensure that the two semicircles are clamped.
In operation, the quenched semi-finished product is placed into the clamping opening 2 of the fixing clamp 1, the groove bottom of the V-shaped groove 4 in the product blank is ensured to be opposite to the right side face of the extension table 3, then the hydraulic machine 6 above is driven to work, the punching tool bit 7 below is driven to punch downwards, the product blank is quickly punched to form two semicircular structures, two semicircles of the punched product are locked through screws, the two semicircles are ensured to be spliced together according to the tight thread joint of the irregular section all the time, and later-stage fine machining is facilitated, so that the structure is simple to operate.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A punching process of a main shaft connecting rod is characterized by comprising the following steps:
s1, obtaining a workpiece blank and finishing the rough machining size;
s2, milling a V-shaped groove (4) with the width of 1mm on the central boundary line of the inner hole to be punched, wherein the V-shaped groove (4) extends along the direction of the central boundary line, and meanwhile, the punching starting point is ensured to be positioned in the extending direction of the V-shaped groove (4);
s3, quenching the workpiece processed in the step S2, hardening and tempering the surface hardness of the workpiece to Hv within the range of 600-800 by using a multifunctional quenching furnace, and controlling the hardening depth within the range of 0.2-0.3mm to finally form a hardening layer of 0.2-0.3 mm;
s4, placing the quenched workpiece into a fixed clamp in a punching device to clamp the workpiece, ensuring that the workpiece needs to be punched and the surface containing the V-shaped groove (4) is opposite to a punching tool of the punching device, and simultaneously ensuring that the target section of the workpiece is overlapped with the edge of the fixed clamp; then starting a hydraulic machine with 100 tons of force to press the workpiece downwards to realize impact fracture, wherein the impact fracture surface generates an irregular surface;
and S5, locking the two semicircles of the punched product through screws, ensuring that the two semicircles are always spliced together according to the tight joint of the irregular section, and finely grinding the inner hole of the punched part and the upper and lower end surfaces of the product by adopting a fine grinding mode to eliminate the deformation generated by punching so as to achieve the necessary precision of the finished product.
2. The impact-breaking process of a spindle connecting rod according to claim 1, wherein: in step S2, the included angle α of the V-shaped groove (4) is 60 °.
3. The impact-breaking process of a spindle connecting rod according to claim 1, wherein: the locking of the two semicircles in step S5 is achieved by 35 kg of force of a locking screw locking the two punched semicircles.
4. The punching equipment used in the punching process of the spindle connecting rod is characterized by comprising a fixed table (9), wherein the fixed table (9) is provided with the following components:
the workpiece clamping device comprises a fixing clamp (1) for clamping a workpiece, wherein a clamping opening (2) for clamping one end of a product is formed in the fixing clamp (1), an opening (2-1) of the clamping opening (2) is located on the right side face of the fixing clamp (1), the right side of the lower bottom face of the opening (2-1) extends outwards to form an extension table (3), and the right side face of the extension table (3) is located right opposite to the bottom of a V-shaped groove (4) of the product;
a punching tool (5), said punching tool (5) comprising a hydraulic press (6) and a punching head (7); the output of hydraulic press (6) is connected with die-cut tool bit (7), just the below of die-cut tool bit (7) is just to the tank bottom in V type groove (4), die-cut tool bit (7) are rectangle rule tool bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011206523.3A CN112372245A (en) | 2020-11-03 | 2020-11-03 | Punching process and punching equipment for main shaft connecting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011206523.3A CN112372245A (en) | 2020-11-03 | 2020-11-03 | Punching process and punching equipment for main shaft connecting rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112372245A true CN112372245A (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011206523.3A Pending CN112372245A (en) | 2020-11-03 | 2020-11-03 | Punching process and punching equipment for main shaft connecting rod |
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| CN (1) | CN112372245A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047463A (en) * | 1989-05-10 | 1990-12-05 | 凯斯勒特殊机器制造有限公司 | The method and apparatus of fracturing connecting rods |
| JP2000213647A (en) * | 1998-11-18 | 2000-08-02 | Daihatsu Motor Co Ltd | Manufacture of connecting rod |
| CN101352795A (en) * | 2007-07-27 | 2009-01-28 | 云南西仪工业股份有限公司 | Method for processing fractured connecting rod for car engine |
| CN202271299U (en) * | 2011-09-19 | 2012-06-13 | 云南西仪工业股份有限公司 | Clamp provided with engine connecting rod |
| CN203161807U (en) * | 2013-01-28 | 2013-08-28 | 广州汽车集团股份有限公司 | Connecting rod assembly |
| CN103406422A (en) * | 2013-07-23 | 2013-11-27 | 丹阳市裕桥精密元件有限公司 | Material cutting mould of punching machine |
| CN207695429U (en) * | 2017-12-21 | 2018-08-07 | 柳州金侨椅业制造有限公司 | Bar thrust mode |
| CN109058280A (en) * | 2018-09-29 | 2018-12-21 | 西安爱生技术集团公司 | A kind of quenched steel alloy of small-sized piston engine rises cracking connecting rod and process for making |
| CN210937368U (en) * | 2019-09-30 | 2020-07-07 | 重庆九方铸造有限责任公司 | Connecting rod cutting device |
-
2020
- 2020-11-03 CN CN202011206523.3A patent/CN112372245A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047463A (en) * | 1989-05-10 | 1990-12-05 | 凯斯勒特殊机器制造有限公司 | The method and apparatus of fracturing connecting rods |
| JP2000213647A (en) * | 1998-11-18 | 2000-08-02 | Daihatsu Motor Co Ltd | Manufacture of connecting rod |
| CN101352795A (en) * | 2007-07-27 | 2009-01-28 | 云南西仪工业股份有限公司 | Method for processing fractured connecting rod for car engine |
| CN202271299U (en) * | 2011-09-19 | 2012-06-13 | 云南西仪工业股份有限公司 | Clamp provided with engine connecting rod |
| CN203161807U (en) * | 2013-01-28 | 2013-08-28 | 广州汽车集团股份有限公司 | Connecting rod assembly |
| CN103406422A (en) * | 2013-07-23 | 2013-11-27 | 丹阳市裕桥精密元件有限公司 | Material cutting mould of punching machine |
| CN207695429U (en) * | 2017-12-21 | 2018-08-07 | 柳州金侨椅业制造有限公司 | Bar thrust mode |
| CN109058280A (en) * | 2018-09-29 | 2018-12-21 | 西安爱生技术集团公司 | A kind of quenched steel alloy of small-sized piston engine rises cracking connecting rod and process for making |
| CN210937368U (en) * | 2019-09-30 | 2020-07-07 | 重庆九方铸造有限责任公司 | Connecting rod cutting device |
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Country or region after: China Address after: Room 323, 3rd Floor, Building 9, No. 1, No. 8 Nenjiang Road, Xinqi Street, Beilun District, Ningbo City, Zhejiang Province, 315000 Applicant after: Qiuba Technology (Ningbo) Co.,Ltd. Address before: 315000 no.119-2, West Street, Tingcun, Guoju street, Beilun District, Ningbo City, Zhejiang Province Applicant before: Ningbo Qiuba Machinery Co.,Ltd. Country or region before: China |
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