CN103753136A - Manufacturing method for rotary cultivator transmission box board - Google Patents
Manufacturing method for rotary cultivator transmission box board Download PDFInfo
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- CN103753136A CN103753136A CN201310733083.0A CN201310733083A CN103753136A CN 103753136 A CN103753136 A CN 103753136A CN 201310733083 A CN201310733083 A CN 201310733083A CN 103753136 A CN103753136 A CN 103753136A
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- steel plate
- rotary cultivator
- stretching
- transmission case
- punching
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
- A01B33/08—Tools; Details, e.g. adaptations of transmissions or gearings
- A01B33/082—Transmissions; Gearings; Power distribution
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Working Implements (AREA)
Abstract
The invention belongs to the technical field of agricultural mechanical devices and provides a manufacturing method for a rotary cultivator transmission box board to solve the problem that the existing rotary cultivator transmission box is large in weight, and the weight cannot be further reduced. The method includes conducting punching pre-stretching on a Q235 steel plate which is 3mm in thickness to form a hemispherical stretching cavity 26mm in radius to obtain a first pre-stretching steel plate, heating the pre-stretching steel plate in a heating furnace to the temperature of 680-700 DEG C, keeping the temperature for 3 hours, cooling the steel plate with the furnace to form an annealing steel plate; conducting constant temperature acid washing on the annealing steel plate by utilizing hydrochloric acid with the mass percent concentration as 10%-15% till an oxide layer of the annealing steel plate falls off to obtain an acid washing steel plate, conducting pre-punching stretching on the hemispherical stretching cavity in the acid washing steel plate to form a reversed circular truncated cone cavity with 90-degree chamfering face arranged on the lateral face to form a second pre-stretching steel plate, and conducting pre-punching stretching on the reversed circular truncated cone cavity in the second pre-stretching steel plate to form a cylindrical cavity 52mm in diameter and 14mm in depth to form the rotary cultivator transmission box board. By means of the method, the technical problem can be effectively solved.
Description
Technical field
The invention belongs to agricultural machinery equipment technical field, relate to a kind of preparation method of rotary cultivator transmission case plate.
Background technology
The transmission case of 121 rotary cultivators that China's current is produced is all traditional cast iron HT200 foundry goods, the casting technique labour intensity of producing this foundry goods is large, yield rate is low, contaminated environment, the casting weight finally obtaining is also larger, and then increased overall weight and the manufacturing cost of 121 rotary cultivators, and be unfavorable for the raising of rotary cultivator farming efficiency.
Current solution is the weight that alleviates 121 rotary cultivator transmission cases, reduce the thickness of 121 rotary cultivator transmission case foundry goods, but this can reduce the mechanical strength of transmission case again, loses more than gain.
Summary of the invention
Technical problem to be solved by this invention is that the weight of rotary cultivator transmission case is large, adopt traditional handicraft in the situation that meeting the normal use of rotary cultivator transmission case, the further problem of weight reduction, and a kind of preparation method of rotary cultivator transmission case plate is provided for this problem.
From the angle of prior art, it is quite obvious adopting stamping parts to replace the technical advantage of foundry goods, and under identical thickness, the mechanical strength of stamping parts often will be higher than foundry goods, and weight is lower than foundry goods.Simultaneously that the stamping technique of stamping parts is conventionally low than the casting technique cost of foundry goods again, environment negative effect greatly reduces.Yet, stamping parts replaces the technology inferior position of foundry goods also to can not be ignored, steel plate stamping to be pressed into rotary cultivator transmission case plate, just need to be on steel plate a plurality of shapes of punching press chamber, take bore as 52mm, the degree of depth is that the shape chamber of 14mm is example, common Sheet Metal Forming Technology is carried out after punching press at the Q235 steel plate to 3mm thickness, the centre-to-centre spacing in two adjacent shape chambeies should be no less than 126mm, between two shape chambeies of guarantee, there is enough steel length to adapt to the tensile deformation producing in punching course like this, to guarantee the steel materials in shape chamber, maintain the mechanical strength of transmission boxboard, but between two shape chambeies, larger centre-to-centre spacing means that the gear in rotary cultivator transmission case will correspondingly strengthen, thereby the design size of whole transmission case also will become greatly to reach the gearratio of design in advance, finally, no matter rotary cultivator transmission case plate is from volume, weight, or from cost, all having to add significantly increases.Why have these tech angsts, currently available technology still adopts the form of cast casting to manufacture rotary cultivator transmission case plate.
But the employing that the present invention is bold with stamping parts, replace the form of foundry goods to make rotary cultivator transmission case plate, got rid of above-mentioned tech angst completely.That specifically, the present invention adopts is following preparation method:
A preparation method for rotary cultivator transmission case plate, raw material are the Q235 steel plate that 3mm is thick, comprising:
A, with the first mould, the thick Q235 steel plate of 3mm is carried out to punching press prestretched, forming radius equals the hemispherical elongated cavity of 26mm, obtains the first prestretched steel plate;
B, prestretched steel plate is placed in pot arch and is heated to 680 ℃-700 ℃, be incubated coolingly with stove after 3 hours, form annealed sheet steel;
C, hydrochloric acid normal temperature pickling to the annealed sheet steel oxide layer that is 10%-15% with mass percent concentration by annealed sheet steel come off, and obtain pickled plate;
D, with the second mould, the hemispherical elongated cavity pre-punching in pickled plate is drawn into the inverted round stage chamber that side is 90 ° of fillet surfaces, forms the second prestretched steel plate;
E, with the 3rd mould, the inverted round stage chamber pre-punching in the second prestretched steel plate to be drawn into diameter be 52mm, and the cylindrical cavity that the degree of depth is 14mm, forms rotary cultivator transmission case plate.
The method that the preparation method of rotary cultivator transmission case plate of the present invention adopts three pre-punching stretchings and annealing and pickling to combine, reduced greatly the deformation that cylindrical cavity (being also shape chamber) punching press causes the steel between adjacent two cylindrical cavities, thereby can be not less than under the prerequisite of the mechanical strength that adopts conventional Sheet Metal Forming Technology to obtain corresponding rotary cultivator transmission case plate in the mechanical strength of guaranteeing resulting rotary cultivator transmission case plate, permission foreshortens to 84mm by the centre-to-centre spacing between two cylindrical cavities, thereby make preparation less, lighter, the rotary cultivator transmission case that cost is lower becomes possibility, the even thickness of the rotary cultivator transmission case plate obtaining, more than reaching 2.95mm.
Accompanying drawing explanation
Fig. 1 is structural representation during the first mould punching described in embodiment;
Fig. 2 is structural representation during the second mould punching described in embodiment;
Fig. 3 is structural representation during the 3rd mould punching described in embodiment;
Fig. 4 is the structural representation of hemispherical elongated cavity described in embodiment;
Fig. 5 is the structural representation in inverted round stage chamber described in embodiment;
Fig. 6 is the structural representation of cylindrical cavity described in embodiment.
The specific embodiment
This specific embodiment is the supplementary notes to summary of the invention.
Before the present invention, although simple to the stamping method of rotary cultivator transmission case plate, product qualified rate is not high, and a punching press meeting makes the violent deformation of the local generation of steel plate, even fracture.And the preparation method of rotary cultivator transmission case plate of the present invention is except can reaching the related technique effect of summary of the invention part, also at least can reach another one technique effect, guarantee that rotary cultivator transmission case plate is with respect to the even thickness of raw material Q235 steel plate generation deformation place, avoid occurring because of the phenomenon that the final rotary cultivator transmission case plate mechanical strengths of impact such as slight crack occur in uneven thickness.
In order to realize above-mentioned technique effect, the present invention considers first Q235 steel plate to be carried out pre-punching for the first time and stretches, in pre-punching stretches for the first time, the present invention selects first elongated cavity pre-punching to be drawn into hemispherical, than plane steel plate, the deformation that each particle in hemispherical elongated cavity occurs due to sphere radian etc. assimilation be also identical, even if in the situation that therefore overall deformation quantity is larger,, can not there is the situation of local fracture in uniformity that still can deformation place steel plate thickness.
Then to before hemispherical elongated cavity being carried out to pre-punching stretching for the second time and pre-punching stretches for the third time, first anneal, at least make hemispherical elongated cavity Steel material softening, annealing temperature is arranged on 680 ℃-700 ℃, at least make the soft durometer of hemispherical elongated cavity Steel material moderate, in carrying out further punching stretch process, (moderate soft durometer makes attenuation place can when punching press, to attenuation place, supplement Steel material timely around to reduce the local steel plate thickness attenuation that Local Shape variable is large, keep thickness evenly) possibility, cause that slight crack even ruptures.
Again annealed sheet steel is carried out to pickling subsequently, to remove the oxide layer on annealed sheet steel surface, generally, as long as the present invention once anneals and pickling, too much annealing and acid pickling step can reduce the thickness of final rotary cultivator transmission case plate, its mechanical strength of corresponding reduction.But if there is crackle (in fact, seldom there is (probability of happening is below 1%) in this situation, and generally appear at after pre-punching stretching for the second time or pre-punching stretching for the third time), can consider again to anneal and pickling, and then carry out for the second time that pre-punching stretches and for the third time pre-punching stretch, the Steel material thickness size that makes deformation place is homogenising again.
Why those skilled in the art do not worry occurring crackle at the process light plate of pre-punching stretching for the second time and pre-punching stretching for the third time, one of them reason is that the present invention is to having done special design through the inverted round stage chamber that pre-punching forms after stretching for the second time: on the one hand, the deformation quantity that the deformation that inverted round stage chamber occurs with respect to hemispherical elongated cavity and final cylindrical cavity occur with respect to inverted round stage chamber is little (have at least the shape in part inverted round stage chamber similar to hemispherical elongated cavity and cylindrical cavity) all, can significantly reduce the probability that crackle occurs, therefore inverted round stage chamber is suitable stretching adapter cavity shape, on the other hand, if the present invention finds the side in inverted round stage chamber to be arranged to 90 ° of fillet surfaces that radius is 8mm, can be in the situation that deformation quantity be less, substantially to two lumen pores, (be not hemispherical elongated cavity, one of inverted round stage chamber or cylindrical cavity) between Steel material draw material, in fact, hemispherical elongated cavity, the internal surface area of inverted round stage chamber and cylindrical cavity is basic identical, and (for example the internal surface area in hemispherical elongated cavity and inverted round stage chamber is respectively 4345.28mm
2and 4408.56mm
2), thereby the even thickness degree of enhancing rotary cultivator transmission case board finished product further guarantees that slight crack does not appear in steel plate when pre-punching stretches.
For the ease of implementing the present invention, this specific embodiment is also the first pre-punching drawing plate, the pre-punching of the second pre-punching drawing plate and rotary cultivator transmission case plate stretches provides respectively the first mould, the second mould and the 3rd mould, described the first mould comprises the first counterdie and the first patrix, described the first counterdie and the first patrix are respectively equipped with hemispherical groove and the hemispherical drift for hemispherical elongated cavity described in pre-punching stretching a step, described the second mould comprises the second counterdie and the second patrix, described the second counterdie and the second patrix are respectively equipped with inverted round stage groove and the inverted round stage drift for inverted round stage chamber described in pre-punching stretching d step, described the 3rd mould comprises the 3rd counterdie and the 3rd patrix, described the 3rd counterdie and the 3rd patrix are respectively equipped with cylindrical groove and the cylinder drift for cylindrical cavity described in pre-punching stretching e step.
Embodiment
See Fig. 1 to Fig. 6, prepare in advance the first mould, the second mould, the thick Q235 steel plate of the 3rd mould and 3mm, described the first mould comprises the first counterdie 6 and the first patrix 5, described the first counterdie 6 and the first patrix 5 are respectively equipped with hemispherical groove 8 and hemispherical drift 7, described the second mould comprises the second counterdie 9 and the second patrix 10, described the second counterdie 9 and the second patrix 10 are respectively equipped with inverted round stage groove 11 and inverted round stage drift 12, described the 3rd mould comprises the 3rd counterdie 14 and the 3rd patrix 13, described the 3rd counterdie 14 and the 3rd patrix 13 are respectively equipped with cylindrical groove 16 and cylinder drift 15.
And then prepare rotary cultivator transmission case plate, raw material are the Q235 steel plate that 3mm is thick, specifically comprise:
1, the thick Q235 steel plate of 3mm is placed on the first counterdie 6, then with the first patrix 5, carries out punching press prestretched, forming radius equals the hemispherical elongated cavity 1 of 26mm, the first prestretched steel plate that the distance of adjacent stretchable holes is 84mm;
2, the first prestretched steel plate is placed in pot arch and is heated to 690 ℃, be incubated coolingly with stove after 3 hours, form annealed sheet steel;
3, the hydrochloric acid normal temperature pickling that is 13% by annealed sheet steel with mass percent concentration, comes off the oxide layer on annealed sheet steel surface completely, obtains pickled plate;
4, pickled plate is placed on the second counterdie 9, then with the second patrix 10, carry out punching press prestretched, make hemispherical elongated cavity 1 pre-punching be drawn into the inverted round stage chamber 2 that side is 90 ° of fillet surfaces 3, obtain the second prestretched steel plate, check the second prestretched steel plate, if have crackle on discovery steel plate, return to the 2nd step, if not, carry out the 5th step;
5, the second prestretched steel plate is placed on the 3rd counterdie 14, then with the 3rd patrix 13, carry out punching press prestretched, making inverted round stage chamber pre-punching tensile layer diameter is 52mm, and the cylindrical cavity that the degree of depth is 14mm, obtains rotary cultivator transmission case plate, check rotary cultivator transmission case plate, if finding has crackle on transmission boxboard, return to the 2nd step, otherwise obtain rotary cultivator transmission case board finished product, (distance between adjacent two cylindrical cavities is 84mm, the even thickness of rotary cultivator transmission case plate, and more than 2.95mm).
Claims (7)
1. a preparation method for rotary cultivator transmission case plate, raw material are the Q235 steel plate that 3mm is thick, comprising:
A, with the first mould, the thick Q235 steel plate of 3mm is carried out to punching press prestretched, forming radius equals the hemispherical elongated cavity of 26mm, obtains the first prestretched steel plate;
B, prestretched steel plate is placed in pot arch and is heated to 680 ℃-700 ℃, be incubated coolingly with stove after 3 hours, form annealed sheet steel;
C, hydrochloric acid normal temperature pickling to the annealed sheet steel oxide layer that is 10%-15% with mass percent concentration by annealed sheet steel come off, and obtain pickled plate;
D, with the second mould, the hemispherical elongated cavity pre-punching in pickled plate is drawn into the inverted round stage chamber that side is 90 ° of fillet surfaces, forms the second prestretched steel plate;
E, with the 3rd mould, the inverted round stage chamber pre-punching in the second prestretched steel plate to be drawn into diameter be 52mm, and the cylindrical cavity that the degree of depth is 14mm, forms rotary cultivator transmission case plate.
2. the preparation method of a kind of rotary cultivator transmission case plate according to claim 1, is characterized in that in carrying out a to e step process, if find that deformation place of Q235 steel plate has crackle, re-executes b step and c step.
3. the manufacture method of a kind of rotary cultivator transmission case plate according to claim 1, the radius that it is characterized in that 90 ° of fillet surfaces in d step is 8mm.
4. the manufacture method of a kind of rotary cultivator transmission case plate according to claim 1, it is characterized in that described the first mould comprises the first counterdie and the first patrix, described the first counterdie and the first patrix are respectively equipped with hemispherical groove and the hemispherical drift for hemispherical elongated cavity described in pre-punching stretching a step.
5. the manufacture method of a kind of rotary cultivator transmission case plate according to claim 3, it is characterized in that described the second mould comprises the second counterdie and the second patrix, described the second counterdie and the second patrix are respectively equipped with inverted round stage groove and the inverted round stage drift for inverted round stage chamber described in pre-punching stretching d step.
6. the manufacture method of a kind of rotary cultivator transmission case plate according to claim 1, it is characterized in that described the 3rd mould comprises the 3rd counterdie and the 3rd patrix, described the 3rd counterdie and the 3rd patrix are respectively equipped with cylindrical groove and the cylinder drift for cylindrical cavity described in pre-punching stretching e step.
7. according to the preparation method of a kind of rotary cultivator transmission case plate described in claim 1 or 2 or 3 or 4 or 5 or 6 or 7, it is characterized in that the centre-to-centre spacing of adjacent two cylindrical cavities in the rotary cultivator transmission case plate of e step is 84mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310733083.0A CN103753136B (en) | 2013-12-26 | 2013-12-26 | A kind of preparation method of rotary cultivator transmission box board |
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| CN201310733083.0A CN103753136B (en) | 2013-12-26 | 2013-12-26 | A kind of preparation method of rotary cultivator transmission box board |
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| CN103753136A true CN103753136A (en) | 2014-04-30 |
| CN103753136B CN103753136B (en) | 2016-08-31 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104308474A (en) * | 2014-09-26 | 2015-01-28 | 浙江森波特搪瓷有限公司 | Enameled cup billet making process |
| CN104785570A (en) * | 2015-04-29 | 2015-07-22 | 柳州三农科技有限公司 | Method for preparing rotary cultivator gearbox plate |
| CN107243718A (en) * | 2016-12-16 | 2017-10-13 | 石家庄市金韧强机械设备有限公司 | A kind of rotary cultivator tool rest and its manufacture method |
| CN108787899A (en) * | 2018-08-27 | 2018-11-13 | 沈阳聚和源汽车部件有限公司 | A kind of compressor bottom cap chamfer mould |
| CN112846647A (en) * | 2020-12-18 | 2021-05-28 | 北京航星机器制造有限公司 | Forming method of special-shaped curved surface structural part |
| CN114309238A (en) * | 2021-12-29 | 2022-04-12 | 安徽瑞荣汽车零部件有限公司 | Production process method for improving bright surface of steel back |
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| CN1757006A (en) * | 2003-03-04 | 2006-04-05 | 泰森克鲁普索弗蒂公司 | Pedal unit plate and method for the production thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104308474A (en) * | 2014-09-26 | 2015-01-28 | 浙江森波特搪瓷有限公司 | Enameled cup billet making process |
| CN104785570A (en) * | 2015-04-29 | 2015-07-22 | 柳州三农科技有限公司 | Method for preparing rotary cultivator gearbox plate |
| CN107243718A (en) * | 2016-12-16 | 2017-10-13 | 石家庄市金韧强机械设备有限公司 | A kind of rotary cultivator tool rest and its manufacture method |
| CN108787899A (en) * | 2018-08-27 | 2018-11-13 | 沈阳聚和源汽车部件有限公司 | A kind of compressor bottom cap chamfer mould |
| CN112846647A (en) * | 2020-12-18 | 2021-05-28 | 北京航星机器制造有限公司 | Forming method of special-shaped curved surface structural part |
| CN114309238A (en) * | 2021-12-29 | 2022-04-12 | 安徽瑞荣汽车零部件有限公司 | Production process method for improving bright surface of steel back |
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| CN103753136B (en) | 2016-08-31 |
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