CN112024684B - Method for processing straight teeth on end surface - Google Patents
Method for processing straight teeth on end surface Download PDFInfo
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- CN112024684B CN112024684B CN202010844576.1A CN202010844576A CN112024684B CN 112024684 B CN112024684 B CN 112024684B CN 202010844576 A CN202010844576 A CN 202010844576A CN 112024684 B CN112024684 B CN 112024684B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/01—Selection of materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a method for processing straight teeth on end faces, which comprises the following specific steps: step 1, selecting a processing die, determining the size of a blank according to an end face straight tooth piece, and further determining the processing die; step 2, mounting a processing die, namely mounting the processing die on a high-tonnage hydraulic press; step 3, blanking and making a blank, and placing the blank into a cavity of a processing die; and 4, forming the end face tooth finished product at one time, starting a high-tonnage hydraulic press, pressing the high-tonnage hydraulic press and the processing die in a matched manner, and pressing the end face tooth on the processing die at one time to form the end face tooth finished product. The invention has reasonable design, adopts a one-time pressing method, greatly improves the efficiency and the tooth part precision.
Description
Technical Field
The invention relates to the technical field of mechanical manufacturing of gears, in particular to a method for machining end face straight teeth.
Background
End face straight teeth, particularly end face straight teeth used on commercial vehicles, are known to have large products, more teeth and high tooth profile requirements (note that the diameter is generally more than phi 120 mm). The current machining methods for the end face straight teeth include two types: the first one is to use machining center to machine one tooth by one tooth, the second one is to use vertical milling machine to match with manual index head or automatic index head (special numerical control system is needed), and also to machine one tooth by one tooth (note: the number of teeth of the product is generally more than 70). As the straight teeth on the end face of the commercial vehicle generally have more than 60 teeth, for the two machining processes, the time consumption is long when one product is machined, and the efficiency is low, wherein for the machining process by adopting a machining center, the defects of high equipment cost and high product cost in depreciation are overcome, and for the milling machine matched with the dividing head, the efficiency is not high, and the precision is not high. There is therefore a need for improvements in the art.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the end face straight tooth processing method which is reasonable in design, the efficiency is greatly improved by adopting a one-time pressing method, and the tooth part precision is also greatly improved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for processing straight teeth on end faces comprises the following specific steps:
step 1, selecting a processing die, determining the size of a blank according to an end face straight tooth piece, and further determining the processing die;
step 3, blanking and making a blank, and placing the blank into a cavity of a processing die;
and 4, forming the end face tooth finished product at one time, starting a high-tonnage hydraulic press, pressing the high-tonnage hydraulic press and the processing die in a matched manner, and pressing the end face tooth on the processing die at one time to form the end face tooth finished product.
Preferably, the processing die comprises a punch and a die holder, a die cavity is arranged in the die holder, a blank to be processed is arranged in the die cavity, the punch is provided with a tooth shape, the blank is pressed on a high-tonnage hydraulic machine through the mutual matching of the die cavity of the die holder and the punch, and the die cavity of the die holder is pressed with the end face tooth at one time.
Preferably, the punch comprises a punch head, the end face of the punch head is provided with a tooth shape, and the blank is pressed at one time through the tooth shape. The arrangement is favorable for realizing that the punch forms the end face teeth by pressing the blank once, the processing time for processing the tooth part is greatly shortened, the average time per piece of the punch is reduced to about 20 seconds per piece from the average time of 4 minutes per piece of the traditional process, the processing efficiency of the tooth part is improved by nearly 12 times, the punch is more favorable for large-batch production and manufacture, the processing efficiency of the product is greatly improved, and the cost is linearly reduced.
Preferably, the punch comprises an outer cylinder body and an inner core body, the outer cylinder body and the inner core body are integrally formed, the lower end face of the outer cylinder body is provided with a tooth shape, the height of the inner core body is larger than that of the outer cylinder body, the lower end face of the outer cylinder body is just consistent with the upper end face of a blank, and the outer diameter of the inner core body is smaller than or equal to the inner diameter of the blank. The mode is more favorable for the punch to move back and forth in the die cavity of the die holder, thereby realizing the production and the manufacture in large batch and ensuring the more stable operation.
Preferably, a ceramic hardened layer is added on the tooth-shaped surface. The surface of the ceramic hard layer is greatly improved in hardness, and the ceramic hard layer is particularly suitable for preparing gears and the like which require higher surface hardness.
Preferably, the outer surface of the punch and the inner surface of the die cavity of the die holder are coated with high-strength resin layers, and the outer surface of the punch and the inner surface of the die cavity of the die holder are uniformly coated with a layer of high-strength resin material, so that the processing die has the hardness and toughness of resin, the strength of metal is processed, the mold stripping performance and the surface toughness of the processing die are improved, and the service life of the processing die is prolonged.
Preferably, the thickness of the high-strength resin layer is 4 mm or 6-8 mm.
Preferably, the high tonnage press is a 15000 ton high tonnage hydraulic press. The 15000 ton high-tonnage hydraulic press meets the processing requirements of end face teeth, especially the processing requirements of straight teeth on the end face of a commercial vehicle.
The invention has the beneficial effects that: compared with the prior art, the blank to be processed is placed in the cavity of the processing die, and then the end face teeth are pressed on the processing die at one time through the matching of the high-tonnage hydraulic machine and the processing die to form the end face tooth finished product.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Fig. 2 is a schematic view of the processing mold of the present invention.
Detailed Description
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in when used, and are only used for convenience of describing the present invention and simplifying the description, but 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," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood, however, that the detailed description herein of specific embodiments is intended to illustrate the invention and not to limit the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Referring to fig. 1, a method for processing end face straight teeth includes the following steps:
step 1, selecting a processing die, determining the size of a blank according to an end face straight tooth piece, and further determining the processing die;
step 3, blanking and making a blank, and placing the blank into a cavity of a processing die;
and 4, forming a finished end face tooth part at one time, starting a high-tonnage hydraulic press, performing matched pressing of the high-tonnage hydraulic press and a processing die, and pressing end face teeth on the processing die at one time (note that the number of teeth of the end face tooth product is generally more than 70) to form the finished end face tooth part.
As shown in fig. 2, the processing mold 1 includes a punch 11 and a mold base 12, a mold cavity 121 is arranged in the mold base 12, a high-strength resin layer is coated on both the outer surface of the punch 11 and the inner surface of the mold cavity 121 of the mold base 12, the thickness of the high-strength resin layer is 4 mm or 6-8 mm, a blank 2 to be processed is installed in the mold cavity 121, a tooth profile 111 is arranged on the punch 11, a ceramic hardened layer is added on the surface of the tooth profile 111, and pressing is performed on a high-tonnage hydraulic press through the mutual matching of the mold cavity 121 of the mold base 12 and the punch 11, so as to press end face teeth on the mold cavity 121 of the mold base 12 at one time. The outer surface of the punch 11 and the inner surface of the die cavity 121 of the die holder 12 are uniformly coated with a layer of high-strength resin material, so that the processing die 1 has the hardness and toughness of resin, the strength of metal of the processing die 1 is also improved, the service life of the processing die 1 is prolonged while the stripping performance and the surface toughness of the processing die 1 are improved, particularly, the adopted 4 mm or 6-8 mm high-strength resin layer is more beneficial to being conveniently coated on the outer surface of the punch 11 and the inner surface of the die cavity 121 of the die holder 12, and secondly, the loss is avoided in the long-term use process, so that the mass production of end face teeth is not facilitated.
The stamping 11 comprises a punch 112, the end face of the punch 112 is provided with a tooth form 111, the blank 2 is formed by one-time pressing through the tooth form 111, the punch 112 comprises an outer column 1121 and an inner core body 1122, the outer column 1121 and the inner core body 1122 are integrally formed, the tooth form 111 is arranged on the lower end face of the outer column 1121, the height of the inner core body 1122 is larger than that of the outer column 1121, the lower end face of the outer column 1121 is just consistent with the upper end face of the blank 2, and the outer diameter of the inner core body 1122 is smaller than or equal to the inner diameter of the blank 2.
The invention mainly aims at the existing straight teeth on the end face of a commercial vehicle, the straight teeth on the end face of the known commercial vehicle play a role in signal transmission, and the straight teeth are mainly made of low-carbon steel such as 20# steel and the like, have low integral hardness and are beneficial to plasticity under integral stress. In the invention, a high-tonnage press is adopted to press end face teeth products at the next time under the guarantee of the processing die 1, and a layer of high-strength resin material is uniformly coated on the outer surface of the punch 11 and the inner surface of the die cavity 121 of the die holder 12, so that the processing die 1 has the hardness and toughness of resin, the strength of metal of the processing die 1 is also processed, the service life of the processing die 1 is prolonged while the mold stripping performance and the surface toughness of the processing die 1 are improved, in particular, the adopted 4 mm or 6-8 mm high-strength resin layer is more beneficial to being conveniently coated on the outer surface of the punch 11 and the inner surface of the die cavity 121 of the die holder 12, and the loss is avoided in the long-term use process, thereby being not beneficial to mass production of the end face teeth. And a ceramic hardened layer is added on the surface of the tooth form 111, which is more beneficial to the relative displacement of the punch 11 in the die cavity 121 of the die holder 12 and is more beneficial to the tooth form precision processed on the blank 2. The method greatly shortens the processing time of the tooth part, reduces the processing time to about 20 seconds per tooth part from 4 minutes per tooth part in the traditional process, improves the processing efficiency of the tooth part by about 12 times, is more favorable for large-batch production and manufacture, greatly improves the processing efficiency of products, and linearly reduces the cost.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present patent.
Claims (3)
1. The method for processing the end face straight teeth is characterized by comprising the following specific steps:
selecting a processing die, determining the size of a blank according to an end face straight tooth part, and further determining the processing die, wherein the processing die comprises a punch and a die holder, a die cavity is arranged in the die holder, the blank to be processed is arranged in the die cavity, the punch is provided with a tooth shape, the blank is pressed on a high-tonnage hydraulic machine through the mutual matching of the die cavity of the die holder and the punch, end face teeth are pressed on the die cavity of the die holder at one time, the punch comprises a punch head, the end face of the punch head is provided with the tooth shape, the blank is pressed through the tooth shape at one time, and high-strength resin layers are coated on the outer surface of the punch and the inner surface in the die cavity of the die holder;
step (2), mounting a processing mould, namely mounting the processing mould on a high-tonnage hydraulic press;
blanking and making a blank, and placing the blank into a cavity of a processing die;
step (4) forming a finished end face tooth part at one time, starting a high-tonnage hydraulic press, pressing the high-tonnage hydraulic press and a processing die in a matched manner, and pressing end face teeth on the processing die at one time to form the finished end face tooth part;
a ceramic hardened layer is added on the surface of the tooth shape; the thickness of the high-strength resin layer is 4 mm or 6-8 mm; the blank is low-carbon steel with low overall hardness, and the blank is provided with a through hole.
2. The method as set forth in claim 1, wherein said punch includes an outer cylinder and an inner core, said outer cylinder and said inner core are integrally formed, a lower end surface of said outer cylinder is provided with a tooth profile, said inner core has a height greater than that of said outer cylinder, said lower end surface of said outer cylinder is exactly in conformity with an upper end surface of the blank, and said inner core has an outer diameter smaller than or equal to an inner diameter of the blank.
3. The method for processing end face spur gear according to claim 1, wherein the high-tonnage press is a 15000 ton high-tonnage hydraulic press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010844576.1A CN112024684B (en) | 2020-08-20 | 2020-08-20 | Method for processing straight teeth on end surface |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010844576.1A CN112024684B (en) | 2020-08-20 | 2020-08-20 | Method for processing straight teeth on end surface |
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| CN112024684A CN112024684A (en) | 2020-12-04 |
| CN112024684B true CN112024684B (en) | 2022-11-15 |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5966944A (en) * | 1982-10-08 | 1984-04-16 | Nissan Motor Co Ltd | Cam face working method of work having tooth profile |
| US6129793A (en) * | 1997-08-11 | 2000-10-10 | Tan; Jie | Face-gear forging method |
| JP2002035883A (en) * | 2000-07-25 | 2002-02-05 | Daido Steel Co Ltd | Manufacturing method of forging die by hobbing |
| CN102861859A (en) * | 2012-08-30 | 2013-01-09 | 镇江中虎弹簧有限公司 | Cold forging process for end face teeth of starting gear |
| CN103658499A (en) * | 2013-12-10 | 2014-03-26 | 常熟柏科汽车零件再制造有限公司 | Starter gear face tooth cold forging technology |
| CN205042992U (en) * | 2015-07-29 | 2016-02-24 | 长钰模具(苏州)有限公司 | Sensor terminal surface ring gear mould |
| JP2017056466A (en) * | 2015-09-14 | 2017-03-23 | トヨタ自動車株式会社 | Forging device for forging end face clutch gear for one-way clutch |
| CN108907053A (en) * | 2018-06-29 | 2018-11-30 | 安徽宜安精密机械零部件有限公司 | A kind of face gear finish forge mould |
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