CN101758147B - Fine cutting and trimming process for auto brake shoe pad stop and die - Google Patents
Fine cutting and trimming process for auto brake shoe pad stop and die Download PDFInfo
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- CN101758147B CN101758147B CN2009101867075A CN200910186707A CN101758147B CN 101758147 B CN101758147 B CN 101758147B CN 2009101867075 A CN2009101867075 A CN 2009101867075A CN 200910186707 A CN200910186707 A CN 200910186707A CN 101758147 B CN101758147 B CN 101758147B
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Abstract
The invention belongs to the fields of machining processes and devices, and relates to a fine cutting and trimming process for an auto brake tendon baffle plate and a die. The process comprises the following steps: (1) cutting, namely determining the machining allowance which can be reserved for a position of a workpiece needing trimming and the number of times of fine cutting and trimming, and carrying out cutting on the raw material of the brake tendon baffle plate; (2) blanking, namely determining the blanking size, and then carrying out blanking on the cut blank; (3) punching, namely making positioning references for fine cutting and trimming; and (4) fine cutting and trimming, namely determining the shapes, sizes, and the like of cutting edges of male and female dies, then carrying out fine cutting and trimming, wherein the die for fine cutting and trimming adopts an once positioning type of 'positioning two pins on a plane', and the positioning reference thereof is consistent with the design reference of the component, which well eliminates the error caused by a plurality of clamping. The process can ensure the quality conformity and stability of two end faces of heavy-plate workpieces, increase the productivity and reduce the production cost.
Description
Technical field
The invention belongs to mechanical processing technique and apparatus field, the essence that relates to a kind of auto brake tendon baffle is cut deburring technology and mould.
Background technology
The shoe brake of automobile axle is used to the brake tendon baffle that leads, locate when installing, be to adopt by traditional technology: blanking-blanking-punching-flatten-mill limit-flash removed reaches product figure requirement.Although adopt two assembled end of horizontal milling machine end mill brake tendon baffle; But owing on milling machine, can only process an end face at every turn; To process every product of two end faces at present and all will carry out the clamping location No. 2 times; And all exist the deviation on the location, the uniformity of workpiece to be difficult to guarantee that the guiding angle of both ends of the surface is difficult to stablize during each clamping; The symmetry of both ends of the surface is difficult to reach requirement; The roughness Ra value of both ends of the surface is difficult to guarantee that therefore, there is risk in the quality of product always.Through designing a kind of No. 1 clamping location, using the fine-edge blanking essence to cut Trimming Die and technology, make product add the accurate positioning in man-hour like this, guarantee assembled end uniform quality, stable, just seem very necessary.
Summary of the invention
One of the object of the invention be designed in a kind of can the raising, the end face quality of heavy-gauge sheeting, and make the essence of the auto brake tendon baffle that production capacity strengthens, production cost descends cut deburring technology.
Two of the object of the invention is that the essence that has designed a kind of described auto brake tendon baffle is cut the mould of deburring technology.
One of the object of the invention is achieved in that and comprises blanking, blanking, punching and trimming process step,
Be specially:
(1), blanking operation: according to raw-material material, thickness and this product end surface quality requirement of brake tendon baffle; The table 2-30 of ISBN7-111-05292-7 " Sheet Metal Forming Technology designs with mould " the P92 page or leaf of publishing according to China Machine Press is to the regulation of " the bilateral surplus of trimming "; Analyze and calculate the allowance that position that workpiece need adopt the trimming operation should reserve and essence and cut trimming and need carry out number of times, the brake tendon baffle raw material are carried out blanking;
(2), blanking operation: with the design size of brake tendon baffle length direction; The workpiece end face fracture belt width that in the blanking operation, draws by bilateral gap protruding, die; The bilateral surplus three association addition calculation that above-mentioned essence is cut trimming go out the blanking size range; According to its adaptability of producing assembling, confirm brake tendon baffle blanking size again, blank after baiting is carried out blanking;
(3), punching operation: go out 2 holes in the centre position of brake tendon baffle with perforating die, be used for cutting trimming process step and make positioning reference in essence;
(4), essence cuts trimming process step: at first, according to the bilateral surplus of the material of processing work, thickness, size, profile, end face quality requirement, required trimming number of times, trimming design that essence cuts that deburring is protruding, the blade shape of die and size; Secondly, choose mold materials, according to the heat treatment characteristic of die point hardness requirement and mold materials, confirm that essence cuts that deburring is protruding, the mold materials of die and heat treatment mode according to standard wear-resisting, that quenching degree good, heat treatment deformation is little; Then, according to improving cutting speed, reduce slightly degree of making of machined surface, the standard of slowing down tool wear is chosen essence and is cut that deburring is protruding, die lubricating oil; Then, according to the size of processing work, the detent mechanism that profile is confirmed workpiece; At last, confirm the chip removal problem of workpiece discharge way and solution waste material.
Said essence is cut trimming process step and is preferably:
The 1st the step, the brake tendon baffle essence is cut Trimming Die, be installed on the steam-operating forcing press, mould is divided into upper and lower two parts, essence is cut the top of punch at mould, essence is cut the bottom of die at mould;
The 2nd the step, cut punch in essence, essence is cut on the die work cutting edge and is brushed lubricating oil;
The 3rd step, detent mechanism alignment pin, essence that the prefabricated brake tendon baffle after the punching operation is placed on mould are cut on the die;
The 4th goes on foot, starts forcing press, by designing requirement prefabricated brake tendon baffle is carried out stamping-out processing;
After the 5th step, the stamping-out processing; Forcing press and essence are cut the punch return, then, carry out the workpiece discharging: get from stepping down of upper mould fixed plate with long forceps and take out brake tendon baffle the hopper; Then, carry out the chip removal of waste material: with the lamb hairbrush deburring waste material is removed and separated.
Two of the object of the invention is achieved in that mould is a locate mode of taking " plane and two pits " one-time positioning, and its positioning reference is consistent with the Element Design benchmark, has well eliminated the error that produces because of multiple clamping.It comprises die shank, cope match-plate pattern, upper die plate, guide pin bushing, upper mould fixed plate; Essence is cut punch, alignment pin, and essence is cut die, guide pillar; The counterdie fixed head, counterdie backing plate, lower bolster, mould are divided into the first half of mould and the latter half of mould; The first half structure of mould is that essence is cut punch and is connected with upper mould fixed plate through bolt, and upper mould fixed plate passes through bolt and alignment pin is connected with upper die plate, and upper die plate passes through bolt and alignment pin is connected with cope match-plate pattern, and die shank is connected with cope match-plate pattern respectively with guide pin bushing; The latter half structure of mould is: alignment pin is cut die with essence and is connected; Essence is cut die and is connected with the counterdie fixed head; The counterdie fixed head is connected with the counterdie backing plate through bolt and alignment pin, and the counterdie backing plate is connected with lower bolster through bolt and alignment pin, and guide pillar is connected with lower bolster; During the upper and lower part of mould assembling, essence is cut punch and smart single face gap of cutting die in the 0.01-0.02mm scope.
The present invention not only can guarantee uniformity, the stability of slab spare workpiece both ends of the surface quality, and can strengthen production capacity, reduces production costs.
Description of drawings:
The essence of Fig. 1, the embodiment of the invention 1 brake tendon baffle is cut Trimming Die master TV structure sketch map.
The essence of Fig. 2, the embodiment of the invention 1 brake tendon baffle is cut deburring bed die plan structure sketch map.
The essence of Fig. 3, the embodiment of the invention 1 brake tendon baffle is cut the deburring artwork.
Among the figure: die shank 1, cope match-plate pattern 2, upper die plate 3, guide pin bushing 4, upper mould fixed plate 5, essence is cut punch 6, alignment pin 7, essence is cut die 8, guide pillar 9, counterdie fixed head 10, counterdie backing plate 11, lower bolster 12, deburring waste material 13, brake tendon baffle 14.
The specific embodiment
Embodiment 1: the brake tendon baffle with on the brake assembly of our company's processing pick up vehicle is an example:
(1), blanking: according to the material of pick up brake tendon baffle, the trade mark: 16MnL, C content: 0.12%～0.20%, thickness 8.0mm and end face quality requirement: 4 ° 30 of both ends of the surface guiding angle ', both ends of the surface symmetry≤0.35mm; Two section roughness Ra value≤6.3 μ m analyze and calculate the allowance that should reserve of position that workpiece need adopt the trimming operation.Because 16MnL sheet material belongs to mild steel, 8.0mm thickness belongs to slab; The table 2-30 " the bilateral surplus of trimming " of ISBN7-111-05292-7 " Sheet Metal Forming Technology designs with mould " the P92 page or leaf of publishing according to China Machine Press confirms that essence cuts trimming and need carry out 2 times, and the 1st bilateral surplus got 0.45mm, the 2nd bilateral surplus got 0.35mm.Above-mentioned two association addition calculation are gone out: it is 0.80mm that essence is cut the bilateral surplus of trimming.
(2), blanking: the process of confirming the preceding road of the smart cutting process of workpiece concerned process steps is the blanking size.The fitted position of pick up brake tendon baffle length direction is 60
-0.5 0Mm, the fracture belt width of its blanking operation both ends of the surface is 0.70mm, and the bilateral surplus that essence is cut trimming is 0.80mm, and above-mentioned three association addition calculation are gone out, and pick up brake tendon baffle blanking size is between 61.0-61.5mm.Produce assembling adaptability according to it, confirm that pick up brake tendon baffle blanking is of a size of 61.2mm.
(3), punching: pick up brake tendon baffle reference for assembling is two middle holes.Go out 2 φ 10.15 in the centre position of pick up brake tendon baffle with perforating die
0 + 0.10The hole, be convenient to cut trimming process step and make positioning reference in essence.
(4), deburring: at first; Design that essence cuts that deburring is protruding, the blade shape of die and size; It is regular cuboid that pick up brake tendon baffle essence is cut deburring punch global shape; Its work edge notch portion is divided 2 layers in work, and the 2nd layer of cutting edge is connected with the 1st layer of cutting edge than the outstanding 0.17mm of the 1st layer of cutting edge operative end surface, the 2nd layer of cutting edge than the 1st layer of high 5.0mm of cutting edge, the 2nd layer of cutting edge operative end surface takes " knife shape " structural transition to increase the intensity and the Technology for Heating Processing property of the 2nd layer of cutting edge; Essence cut the deburring die according to pick up brake tendon baffle profile size design be angled 4 ° 30 ', intermediate width is of a size of trapezoidal single straight cutting edge structure of 57.60 ± 0.02mm; After protruding, cutting edge of die line cuts, all need finish grind and eliminate line cutting silking, guarantee that each cutting edge operative end surface roughness Ra value is within 0.8 μ m; Secondly, confirm that essence cuts that deburring is protruding, the mold materials of die and heat treatment mode, pick up brake tendon baffle essence cuts that deburring is protruding, the mold materials of die is chosen high chromium mould steel Cr12MoV according to standard wear-resisting, that quenching degree good, heat treatment deformation is little; According to selected mold materials Cr12MoV characteristics, confirm heat treatment mode: 980 ℃ of quenchings of low temperature, oil cooling, 180 ℃ of tempering 2 hours, hardness reaches HRC60-62; Then, choose the proper lubrication medium with protection mold work cutting edge, according to not damaging workers ' health and working environment; Do not corrode the worker and press from both sides measurer, have good extreme boundary lubrication property, oxidation stability, antirust corrosion and stability in storage, compare with traditional sulfurized oil; Can improve cutting speed 30～50%; Significantly reduce slightly degree of making of machined surface, slow down the characteristics of tool wear, pick up brake tendon baffle essence cuts that deburring is protruding, die lubricating oil is selected for use: efficient extreme pressure cutting oil.Then, confirm the detent mechanism of workpiece; Just confirm that in the punching operation positioning reference of the smart cutting process of good brake tendon baffle is two middle pilot hole φ 10.15
0 + 0.10And take the locate mode of " plane and two pits ", that is: reach detent mechanism that " essence is cut die 8 " gone up the smart cutting process of set of planes cutification card brake tendon block by 2 " alignment pins 7 "; At last, confirm the workpiece discharge way and solve the chip removal problem of waste material that discharge way is taked " moving on the freedom of stepping down " form, pick up brake tendon baffle 14 essences are cut after the deburring up with punch, and available long forceps is got the hopper from stepping down of upper mould fixed plate 5 and taken out; After pick up brake tendon baffle essence was cut deburring, deburring waste material 13 was bonded at that essence is cut punch 6, essence is cut on the die 8, aimed at deburring waste material 13 light brushes with small-sized wool brush and just can make that itself and brake tendon baffle 14, essence are cut punch 6, essence is cut die 8 and separated for twice.
It is the locate mode of taking " plane and two pits " one-time positioning that the essence of pick up brake tendon baffle is cut Trimming Die, and its positioning reference is consistent with the Element Design benchmark, has well eliminated milling machine and has added the error that produce because of multiple clamping man-hour.The essence of pick up brake tendon baffle is cut the trimming die mould structure shown in " Fig. 1 ": mould is divided into the first half of mould and the latter half of mould; The first half structure of mould is connected with the solid shaped cavity of upper mould fixed plate 5 through bolt for the smart punch 6 of cutting; Upper mould fixed plate 5 is connected with upper die plate 3 through bolt and alignment pin; Upper die plate 3 is connected with cope match-plate pattern 2 through bolt and alignment pin, and die shank 1 is connected with cope match-plate pattern 2 interference fit respectively with guide pin bushing 4; The latter half structure of mould is: alignment pin 7 is connected with smart locating hole interference fit of cutting die 8; Essence is cut die 8 and is connected with the solid shaped cavity interference fit of counterdie fixed head 10; Counterdie fixed head 10 is connected with counterdie backing plate 11 through bolt and alignment pin, and counterdie backing plate 11 is connected with lower bolster 12 through bolt and alignment pin, and guide pillar 9 is connected with lower bolster 12 interference fit; During the upper and lower part of mould assembling, essence is cut punch 6 and smart single face gap of cutting die 8 in the 0.01-0.02mm scope.
The concrete installation: essence is cut punch 6 and is installed in the solid shaped cavity of upper mould fixed plate 5 through bolt; Upper mould fixed plate 5 is installed on the upper die plate 3 through bolt and alignment pin; Upper die plate 3 is installed on the cope match-plate pattern 2 through bolt and alignment pin, and die shank 1, guide pin bushing 4 interference fit are squeezed into and are fixed on the cope match-plate pattern 2; Alignment pin 7 interference fit are squeezed into and are installed in essence and cut on the die 8; Essence is cut die 8 interference fit and is squeezed in the solid shaped cavity that is installed in counterdie fixed head 10; Counterdie fixed head 10 is installed on the counterdie backing plate 11 through bolt and alignment pin; Counterdie backing plate 11 is installed on the lower bolster 12 through bolt and alignment pin, and guide pillar 9 interference fit are squeezed into and are fixed on the lower bolster 12.
Pick up brake tendon baffle essence is cut Trimming Die and is installed on the steam-operating 100T forcing press by the mounting means of common stamping mould.
The essence that just can directly be used for the fine-edge blanking mould after such pick up brake tendon baffle blanking, the punching operation is cut trim process:
The 1st step, pick up brake tendon baffle essence is cut Trimming Die, be installed on the steam-operating 100T forcing press,
In the 2nd step, cut punch 6, essence in essence and cut on the die 8 work cutting edges and to brush efficiently extreme pressure cutting oil with small-sized wool;
In the 3rd step, the detent mechanism alignment pin 7, the essence that the prefabricated pick up brake tendon baffle after the punching operation are placed on mould are cut on the die 8;
The 4th step, start forcing press to prefabricated pick up brake tendon baffle carry out stamping-out be worked into 4 ° 30 of following size: lengthwise dimension 59.7mm, both ends of the surface guiding angle '; Within the both ends of the surface symmetry 0.20mm; Within two section roughness Ra values, the 3.2 μ m;
In the 5th step, after the stamping-out processing, forcing press and essence are cut the punch return, get from stepping down of upper mould fixed plate 5 with long forceps and take out pick up brake tendon baffle 14 hopper; With the lamb hairbrush deburring waste material 13 is separated removal.
After brake tendon baffle on the brake assembly of pick up vehicle uses essence to cut Trimming Die and technology; Its length direction fitted position stablize 59.7 ± 0.1mm, 4 ° 27 '-4 ° 30 of angle of guiding ' between, within the both ends of the surface symmetry 0.20mm, between the both ends of the surface roughness Ra value 2.4-3.2 μ m, the cross section perpendicular degree reaches 89 ° 30 ', eliminated milling machine simultaneously and milled the end face burr that limit technology is produced.The pick up brake tendon baffle of guaranteeing of Sustainable Stability reaches the product drawing requirement.
Brake tendon baffle production process on the brake assembly of pick up vehicle is reduced to 4 present roads by 6 original roads.When improving the quality of products, also promoted production capacity, single products split run production capacity increases to 3000 by 1000, and the split run production capacity promotes 200%.Simultaneously, the single products processing charges by 0.13 yuan/only reduce to 0.08 yuan/only, single-piece work expense descends 0.05 yuan/, i.e. single products production and processing cost cutting 38.46%.The single products raw materials consumption is by milling limit technology: 7.85 * 10
+ 3* 84 * 10
-3* 42 * 10
-3* 8 * 10
-3, change essence into and cut deburring technology: 7.85 * 10
-3* 78 * 10
-3* 42 * 10
-3* 8 * 10
-3, the single products raw materials consumption descends: 7.14%.
Claims (4)
1. the essence of an auto brake tendon baffle is cut deburring technology, comprises blanking, blanking, punching and trimming process step, it is characterized in that:
(1), blanking operation: according to the raw-material material of brake tendon baffle, the end face quality requirement that thickness reaches a block processing work; The table 2-30 of ISBN7-111-05292-7 " Sheet Metal Forming Technology designs with mould " the P92 page or leaf of publishing according to China Machine Press is to the regulation of " the bilateral surplus of trimming "; Analyze and calculate the allowance that position that workpiece need adopt the trimming operation should reserve and essence and cut trimming and need carry out number of times, the brake tendon baffle raw material are carried out blanking;
(2), blanking operation: with the design size of brake tendon baffle length direction; The workpiece end face fracture belt width that in the blanking operation, draws by bilateral gap protruding, die; The bilateral surplus three association addition calculation that above-mentioned essence is cut trimming go out the blanking size range; According to its adaptability of producing assembling, confirm brake tendon baffle blanking size again, blank after baiting is carried out blanking;
(3), punching operation: go out 2 holes in the centre position of brake tendon baffle with perforating die, be used for cutting trimming process step and make positioning reference in essence;
(4), essence cuts trimming process step: at first, according to the bilateral surplus of the material of processing work, thickness, size, profile, end face quality requirement, required trimming number of times, trimming design that essence cuts that deburring is protruding, the blade shape of die and size; Secondly, choose mold materials, according to the heat treatment characteristic of die point hardness requirement and mold materials, confirm that essence cuts that deburring is protruding, the mold materials of die and heat treatment mode according to standard wear-resisting, that quenching degree good, heat treatment deformation is little; Then, according to improving cutting speed, reduce slightly degree of making of machined surface, the standard of slowing down tool wear is chosen essence and is cut that deburring is protruding, die lubricating oil; Then, according to the size of processing work, the detent mechanism that profile is confirmed workpiece; At last, confirm the chip removal problem of workpiece discharge way and solution waste material.
2. the essence of a kind of auto brake tendon baffle according to claim 1 is cut deburring technology, it is characterized in that: said essence is cut trimming process step and is:
The 1st the step, the brake tendon baffle essence is cut Trimming Die, be installed on the steam-operating forcing press, mould is divided into upper and lower two parts, essence is cut the top of punch at mould, essence is cut the bottom of die at mould;
The 2nd the step, cut punch in essence, essence is cut on the die work cutting edge and is brushed lubricating oil;
The 3rd step, detent mechanism alignment pin, essence that the prefabricated brake tendon baffle after the punching operation is placed on mould are cut on the die;
The 4th goes on foot, starts the steam-operating forcing press, by designing requirement prefabricated brake tendon baffle is carried out stamping-out processing;
After the 5th step, the stamping-out processing; Steam-operating forcing press and essence are cut the punch return, then, carry out the workpiece discharging: get from stepping down of upper mould fixed plate with long forceps and take out brake tendon baffle the hopper; Then, carry out the chip removal of waste material: with the lamb hairbrush deburring waste material is removed and separated.
3. the essence of a kind of auto brake tendon baffle according to claim 1 and 2 is cut the particular manufacturing craft in the deburring technology, and it comprises die shank (1), cope match-plate pattern (2); Upper die plate (3), guide pin bushing (4), upper mould fixed plate (5); Essence is cut punch (6), alignment pin (7), and essence is cut die (8); Guide pillar (9), counterdie fixed head (10), counterdie backing plate (11); Lower bolster (12) is characterized in that: mould is divided into the first half of mould and the latter half of mould, and the first half structure of mould is that essence is cut punch (6) and is connected with upper mould fixed plate (5) through bolt; Upper mould fixed plate (5) is connected with upper die plate (3) through bolt and alignment pin, and upper die plate (3) is connected with cope match-plate pattern (2) through bolt and alignment pin, and die shank (1) is connected with cope match-plate pattern (2) respectively with guide pin bushing (4); The latter half structure of mould is: alignment pin (7) is cut die (8) with essence and is connected; Essence is cut die (8) and is connected with counterdie fixed head (10); Counterdie fixed head (10) is connected with counterdie backing plate (11) through bolt and alignment pin, and counterdie backing plate (11) is connected with lower bolster (12) through bolt and alignment pin, and guide pillar (9) is connected with lower bolster (12); During the upper and lower part of mould assembling, essence is cut single face gap that punch (6) and essence cut die (8) in the 0.01-0.02mm scope.
4. the essence of a kind of auto brake tendon baffle according to claim 3 is cut the particular manufacturing craft in the deburring technology; It is characterized in that: essence is cut punch (6) and is connected with the solid shaped cavity of upper mould fixed plate (5) through bolt; Die shank (1) is connected with cope match-plate pattern (2) interference fit respectively with guide pin bushing (4); Alignment pin (7) is connected with the locating hole interference fit that essence is cut die (8), and essence is cut die (8) and is connected with the solid shaped cavity interference fit of counterdie fixed head (10), and guide pillar (9) is connected with lower bolster (12) interference fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101867075A CN101758147B (en) | 2009-12-14 | 2009-12-14 | Fine cutting and trimming process for auto brake shoe pad stop and die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101867075A CN101758147B (en) | 2009-12-14 | 2009-12-14 | Fine cutting and trimming process for auto brake shoe pad stop and die |
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| CN101758147A CN101758147A (en) | 2010-06-30 |
| CN101758147B true CN101758147B (en) | 2012-02-22 |
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|---|---|---|---|
| CN2009101867075A Expired - Fee Related CN101758147B (en) | 2009-12-14 | 2009-12-14 | Fine cutting and trimming process for auto brake shoe pad stop and die |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103111515B (en) * | 2012-11-14 | 2016-01-06 | 无锡爱博金属制品有限公司 | Boot-lid lock stiffener Trimming Die |
| CN103521592B (en) * | 2013-02-27 | 2015-10-28 | 上海汇众汽车制造有限公司 | Improve the method for quality of fracture of blank of high-strength steel |
| CN103357742B (en) * | 2013-07-14 | 2015-05-06 | 威海华邦精冲技术有限公司 | Drum type trimming die for automobile brake shoe |
| CN104492905A (en) * | 2014-11-27 | 2015-04-08 | 柳州市骏信金属制品有限责任公司 | Method for improving quality of punched member with holes |
| CN104525680A (en) * | 2014-12-26 | 2015-04-22 | 江苏新华明机械制造实业有限公司 | Punching and trimming technology with fine punching effect |
| CN104550414A (en) * | 2014-12-29 | 2015-04-29 | 苏州欧美克合金工具有限公司 | Hard alloy blanking die |
| CN108772463B (en) * | 2018-07-18 | 2023-10-24 | 深圳数码模汽车技术有限公司 | Device for adjusting fine cutting gap of automobile die product and fine cutting process |
| CN109013913B (en) * | 2018-09-30 | 2020-04-14 | 江西省天奇汽车零部件有限公司 | Die device |
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