CN211386349U - Parking arm manufacturing mold structure - Google Patents
Parking arm manufacturing mold structure Download PDFInfo
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- CN211386349U CN211386349U CN202020025604.2U CN202020025604U CN211386349U CN 211386349 U CN211386349 U CN 211386349U CN 202020025604 U CN202020025604 U CN 202020025604U CN 211386349 U CN211386349 U CN 211386349U
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Abstract
The utility model relates to a parking arm manufacturing mould structure, which comprises an extrusion mould, wherein the extrusion mould is arranged between a fixed lower mould seat and a vertically movable upper mould seat, and a cavity to be pressed and an extrusion working section which are communicated up and down and run through the extrusion mould are arranged in the extrusion mould; the extrusion die is arranged on the lower die base, and the upper die base is connected with an upper extrusion die rod which can extend into the extrusion die; an ejector rod which can extend into the extrusion die is arranged through the lower die base and extends to the cavity to be pressed for bearing materials when the extrusion die is to be extruded, and the ejector rod is connected with a telescopic oil cylinder which drives the ejector rod to vertically move so as to be lowered to the lower end of the extrusion working section in the extrusion process and provide back pressure; the extrusion die comprises a left half die and a right half die which are separated into half parts, the two half dies can be arranged on the lower die base in a sliding mode so as to be convenient for loading and unloading, and the cavity to be pressed and the extrusion working section are also respectively processed on the two half dies in half parts. The utility model discloses the uneven, the atress of blowing uneven, crooked scheduling problem influence the problem of shaping quality easily appears in can overcoming conventional cold extrusion die.
Description
Technical Field
The utility model belongs to the technical field of metal extrusion's forming tool, concretely relates to mould structure is made to parking arm.
Background
The parking mechanism is a safety device for preventing the vehicle from sliding in the automatic transmission or the new energy electric drive system, is used for reliably stopping the vehicle at a specified position or even on a slope without time limitation, and is an indispensable key mechanism in the automatic transmission or the new energy electric drive system. The parking mechanism is a complex kinematic mechanism, generally consisting of three parts: parking teeth and a parking arm; a parking gear shifting adjusting device; and thirdly, a sliding device. In order to achieve a parking design target, parking teeth and a parking arm are particularly important, a mode that a machining center is used for milling a key working surface is adopted after a traditional machining process of the parking arm is a swaged blank, and the surface profile and the surface roughness of the working surface of the parking arm produced in the machining mode cannot stably meet design requirements, so that the parking force and the extraction force of the parking arm of the parking mechanism exceed the requirements, and vibration and noise are caused. In order to improve the efficiency and ensure the quality, a mode of forming a circumferential key working surface by adopting a cold extrusion process is adopted after a blank is swaged, for example, a parking arm (cross section) shown in fig. 4 is a uniform-section part with a consistent cross section, the thickness is about 11mm, and the total length in the vertical direction of the drawing is about 100 mm; however, the problems of uneven discharging, uneven extrusion stress, extrusion bending deformation, difficult material taking after extrusion and the like occur in the extrusion process, the quality consistency is not good, and further optimization and improvement are needed.
Disclosure of Invention
The above-mentioned not enough to prior art, the to-be-solved technical problem of the utility model is to provide a mould structure is made to parking arm, avoids the unstable problem of manufacturing quality of present parking arm, gains the effect of manufacturing efficiency and quality that effectively promotes parking arm.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the parking arm manufacturing die structure comprises an extrusion die, wherein the extrusion die is arranged between a fixed lower die holder and an upper die holder which can vertically move to realize extrusion action, and a cavity to be pressed and an extrusion working section which are communicated up and down and penetrate through the extrusion die are arranged in the extrusion die; the extrusion die is arranged on the lower die base, and the upper die base is connected with an upper extrusion die rod which can move along with the upper die base and extend into the extrusion die; an ejector rod which penetrates through the lower die base and can stretch into the extrusion die to extend to a cavity to be molded for bearing materials when the extrusion die is extruded, and the ejector rod is connected with a telescopic oil cylinder which drives the ejector rod to vertically move so as to be lowered to the lower end of an extrusion working section in the extrusion process and provide back pressure; the extrusion die adopts a half die structure form and comprises a left half die and a right half die which are divided into a half part and a half part, the two half dies can be arranged on the lower die seat in a sliding mode in an opposite direction and in an opposite direction so as to facilitate loading and unloading, and the cavity to be pressed and the extrusion working section are respectively processed on the two half dies in a half-and-half mode so as to form the cavity to be pressed and the extrusion working section when the two half dies are closed in an opposite direction.
Further perfecting the technical scheme, the two split molds are respectively connected with the horizontal driving mechanism so as to realize the opposite and back-to-back sliding action of the two split molds on the lower mold base.
Further, the horizontal driving mechanism is a telescopic cylinder.
Further, a lower die gasket is arranged between the extrusion die and the lower die base, the lower die gasket is fixedly connected to the lower die, a concave sliding groove is formed in the upper surface of the lower die gasket, convex sliding rails matched with the sliding grooves are respectively arranged on the lower surfaces of the two dies, and the two dies are arranged on the lower die gasket and can slide along the moving direction of the sliding rails matched with the sliding grooves; and the ejector rod penetrates through the lower die gasket.
Further, the profile shape of the upper surface of the ejector rod corresponds to the cross section of the extrusion working section.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses there are two outstanding advantages: firstly, feeding and blanking are convenient, the blank key profile is usually provided with 0.20-0.25 mm of excess material on one side, the blank key profile cannot be directly placed into an extrusion working section of a conventional structure, and even if a guide-in inclined plane is added at the mouth of the conventional structure, the parking arm is not symmetrical in appearance working face, so that the situation of uneven feeding can be caused, and the cold forming quality is influenced; the cavity to be pressed after being opened can effectively avoid the problem of difficult material placing, and is stably supported by the ejector rod, the two molds slide in opposite directions and are folded to form the cavity to be pressed, and the blank is positioned in the cavity to be pressed; after extrusion is finished, the two valve molds slide back to back and open, and then the extruded blank can be taken down, so that the extrusion die is very convenient and easy;
and secondly, the back pressure is provided for the blank through the ejector rod all the time in the extrusion process by combining the telescopic oil cylinder, a precise cold forming preparation method for increasing the back pressure is realized, the problems of uneven stress, bending deformation and the like of the blank in the conventional cold extrusion (the lower end is of an open structure) process can be solved, the design requirements of a parking mechanism can be stably met by each formed circumferential working surface, material removing processing is not needed, particularly, the forming consistency of the bottom surface supported by the ejector rod is very high, and in the subsequent machining (non-extrusion forming working surface) process, the consistency of the post-process processing reference can be ensured by two reference surfaces by taking the bottom surface and any one circumferential working surface as the reference, so that the manufacturing quality of the parking arm in the whole manufacturing process is ensured.
Drawings
Fig. 1 is a schematic structural view of a mold structure for manufacturing a parking arm according to an embodiment (with an upper mold base and an upper extrusion mold rod hidden from top view);
FIG. 2 is a sectional view A-A of FIG. 1 (showing the upper die base, upper extrusion die stem);
FIG. 3 is a separately schematic block diagram (enlarged) of the extrusion die of FIG. 2;
FIG. 4 is a cross-sectional view of a parking arm of the type mentioned in the background;
the extrusion die comprises an extrusion die 1, two dies 11, a slide rail 12, a telescopic cylinder 13, a push block 14, a cavity to be pressed 16, an extrusion working section 17, a lower die base 2, a lower die gasket 21, an upper die base 3, an upper extrusion die rod 31, an ejector rod 4, a telescopic oil cylinder 41 and a blank 5.
Detailed Description
The following describes the present invention in further detail with reference to the accompanying drawings.
Referring to fig. 1 to 3, the parking arm manufacturing mold structure of the embodiment includes an extrusion mold 1, where the extrusion mold 1 is disposed between a fixed lower mold base 2 and an upper mold base 3 capable of moving vertically to realize an extrusion action, and a cavity 16 to be pressed and an extrusion working section 17 communicating up and down and penetrating through the extrusion mold 1 are provided in the extrusion mold 1; the extrusion die 1 is arranged on the lower die base 2, and the upper die base 3 is connected with an upper extrusion die rod 31 which can move along with the upper die base 3 and extend into the extrusion die 1 (a cavity 16 to be pressed and an extrusion working section 17); an ejector rod 4 which can extend into the extrusion die 1 (into a cavity 16 to be molded and an extrusion working section 17) is arranged through the lower die base 2 to extend into the cavity 16 to be molded for bearing materials when the extrusion die is extruded, and the ejector rod 4 is connected with a telescopic oil cylinder 41 which drives the ejector rod to vertically move so as to be lowered to the lower end of the extrusion working section 17 in the extrusion process and continuously provide back pressure; the extrusion die 1 is in a half die structure and comprises two half dies 11 which are divided into a left half and a right half, the two half dies 11 can be arranged on the lower die base 2 in a sliding mode in an opposite direction and in an opposite direction so as to facilitate loading and unloading, and a cavity 16 to be pressed and an extrusion working section 17 are also respectively processed on the two half dies 11 in a half-and-half mode so as to form the cavity 16 to be pressed and the extrusion working section 17 when the two half dies 11 are closed in an opposite direction. It can be understood that, because the machining precision and the roughness of the effective extrusion working section part are high, and the effective extrusion working section part is not required to be set to be too long, the lower end of the extrusion working section 17 of the embodiment is also set to be in a form of circumferential expansion and abdication, and the cross section can correspond to the cavity 16 to be pressed.
For the understanding, the following steps can be adopted when using the mold structure for manufacturing the parking arm in the embodiment:
1) discharging; the ejector beam 4 extends to a cavity 16 to be pressed, the two half dies 11 are opened in a back-to-back sliding mode, and the blank 5 is placed on the upper surface of the ejector beam 4;
2) closing the mold; the two dies 11 slide and close oppositely to form a cavity 16 to be pressed and an extrusion working section 17, and the blank 5 is positioned in the cavity 16 to be pressed;
3) extruding; the upper die holder 3 presses down to drive the upper extrusion die rod 31 to move downwards to enable the lower surface of the upper extrusion die rod 31 to be in contact with the blank 5 and exert pressure, the telescopic oil cylinder 41 provides back pressure for the blank 5 through the ejector rod 4, the back pressure is smaller than the pressure of the upper die holder 3 when pressing down, the upper extrusion die rod 31 simultaneously pushes the blank 5 and the ejector rod 4 to move downwards, the blank 5 is pushed into the extrusion working section 17 and is extruded to form working surfaces in the circumferential direction, and the ejector rod 4 always provides the back pressure for the blank 5 in the extrusion forming process;
4) maintaining the pressure; the upper extrusion die rod 31 stops pressing down and keeps at the designed height after descending to the designed height, and the ejector rod 4 keeps providing back pressure to the blank 5;
5) and (3) discharging, keeping the pressure and leaving the extrusion die 1, enabling the upper extrusion die rod 31 to go upwards to leave the extrusion die 1, enabling the ejector rod 4 not to provide back pressure for the blank 5 but only to serve as a bearing surface, opening the two dies 11 in a back-to-back sliding mode, and taking down the extruded blank 5.
Of course, before step 1), the blank 5 is swaged, and after the swaging, the cross section of the blank 5 corresponds to that of the extrusion working section 17, but a small thickness of allowance is left on one side of the extrusion working section 17; the cross section of the cavity 16 to be pressed is larger than that of the blank 5 after swaging, and is also larger than that of the extrusion working section 17, and the smooth and continuous inclined transition is formed between the cavity 16 to be pressed and the extrusion working section 17.
It can be seen that the parking arm manufacturing mold structure of the embodiment has two outstanding advantages: firstly, feeding and blanking are convenient, the blank 5 is usually placed with 0.20-0.25 mm of excess material on the single side of the key profile, and cannot be directly placed into the extrusion working section 17 with the conventional structure, and even if the guide-in inclined plane is added on the opening part of the conventional structure, the parking arm is not symmetrical in appearance working face, so that the situation of uneven feeding is caused, and the cold forming quality is influenced; the cavity 16 to be pressed after being opened in the embodiment can effectively avoid the problem of difficult material discharge, is stably supported by the ejector rod 4, the two molds 11 slide and are folded oppositely to form the cavity 16 to be pressed, and the blank 5 is positioned in the cavity 16 to be pressed; after extrusion is finished, the two dies 11 slide back to back and open, and the extruded blank 5 can be taken down, so that the extrusion is very convenient and easy;
and secondly, by combining the fact that the telescopic oil cylinder 41 provides back pressure to the blank 5 through the ejector rod 4 all the time in the extrusion process, a precise cold forming preparation method for increasing the back pressure is realized, the problems of uneven stress, bending deformation and the like of the blank 5 in the conventional cold extrusion (the lower end is of an open structure) process can be solved, the design requirements of a parking mechanism can be stably met by each formed circumferential working surface, material removing processing is not needed, particularly, the forming consistency of the bottom surface supported by the ejector rod 4 is very high, and in the subsequent machining (non-extrusion forming working surface) process, the bottom surface and any one circumferential working surface are used as references, and the consistency of the post-process processing references can be ensured by the two reference surfaces, so that the manufacturing quality of the parking arm in the whole manufacturing process is ensured.
The two molds 11 are respectively connected to a horizontal driving mechanism so as to realize the opposite and back-to-back sliding motion of the two molds 11 on the lower mold base 2. The horizontal driving mechanism is a telescopic cylinder 13. In practice, the telescopic cylinder 13 may be operatively connected to the two-piece mold 11 by means of a push block 14 adapted to the shape of the two-piece mold 11.
Therefore, the horizontal driving mechanism is adopted except that the two-piece mold 11 can be manually opened and the mold can be closed (the closed posture can be kept through other clamping pieces after closing so as to be convenient for extrusion), so that the use is more convenient, the automation degree is higher, the efficiency is improved, and the use is safer.
A lower die gasket 21 is arranged between the extrusion die 1 and the lower die holder 2, the lower die gasket 21 is fixedly connected to a lower die, a concave sliding groove is formed in the upper surface of the lower die gasket 21, convex sliding rails 12 matched with the sliding grooves are respectively arranged on the lower surfaces of the two-piece die 11, and the two-piece die 11 is arranged on the lower die gasket 21 and can slide along the moving direction of the sliding rails 12 matched with the sliding grooves; the ejector pin 4 passes through the lower die washer 21.
In this way, sliding contact is provided by the lower die washer 21, and since the sliding member is also a wearing part, the lower die washer 21 can be more conveniently maintained and repaired, saving costs.
Wherein the profile shape of the upper surface of the ejector beam 4 corresponds to the cross section of the extrusion working section 17. The lower surface profile of the upper die rod 31 also corresponds to the cross-section of the extrusion flight 17. Therefore, the extrusion is convenient to implement, and the forming effect of the bottom plane of the blank 5 is better ensured.
The manufacturing steps of the parking arm are further detailed:
1) firstly, performing swaging on a bar stock, generally performing swaging after heating to obtain a blank 5 to be extruded, wherein a small amount of thickness allowance is reserved on one side of the cross section of the blank 5 after swaging compared with the cross section of the extrusion working section 17, and the thickness allowance is generally 0.20-0.25 mm; the cross section of the cavity 16 to be pressed is larger than that of the blank 5 after swaging, so that subsequent discharging is facilitated;
2) descaling the surface of the blank 5 and lubricating the blank;
3) discharging; the material ejecting rod 4 extends to a cavity 16 to be pressed, the two dies 11 are driven by the telescopic cylinder 13 to slide back to open, and the blank 5 at normal temperature is placed on the upper surface of the material ejecting rod 4;
4) closing the mold; the two dies 11 slide and close oppositely to form a cavity 16 to be pressed and an extrusion working section 17, and the blank 5 is positioned in the cavity 16 to be pressed;
5) extruding; the upper die holder 3 is driven to press downwards by an oil press, the upper die holder 3 drives the upper extrusion die rod 31 to move downwards to enable the lower surface of the upper extrusion die rod 31 to contact the blank 5 and apply pressure, and the telescopic oil cylinder 41 provides back pressure to the blank 5 through the ejector rod 4; the parameters of the oil press for driving the upper die holder 3 to press down can be controlled at 15MP (pressure is about 200 tons), the back pressure parameters provided by the telescopic oil cylinder 41 through the ejector rod 4 can be controlled at 5MP (pressure is about 10 tons), the back pressure is smaller than the pressure of the upper die holder 3 to press down, the upper extrusion die rod 31 simultaneously pushes the blank 5 and the ejector rod 4 to move down, the blank 5 is pushed into the extrusion working section 17 and is extruded to form circumferential working faces, the ejector rod 4 always provides back pressure for the blank 5 in the extrusion forming process, and the blank 5 is prevented from being stressed unevenly or bending deformation abnormally in the whole cold forming process;
6) maintaining the pressure; the upper extrusion die rod 31 stops pressing down and keeps at the designed height after descending to the designed height, and the ejector rod 4 keeps providing back pressure to the blank 5; specifically, the upper extrusion die rod 31 descends to enable the blank 5 to pass through the extrusion working section 17 and then be positioned in a relief section below the extrusion working section 17 in the extrusion die 1, and the descending is stopped to combine with the ejector beam 4 to perform pressure maintaining;
7) after the unloading and pressure maintaining meet the time limit, the upper extrusion die rod 31 moves upwards to leave the extrusion die 1, the ejector rod 4 does not provide back pressure to the blank 5 and only serves as a bearing surface, the two die 11 slides back to open, and the extruded blank 5 can be easily taken down.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (5)
1. The parking arm manufacturing die structure comprises an extrusion die, wherein the extrusion die is arranged between a fixed lower die holder and an upper die holder which can vertically move to realize extrusion action, and a cavity to be pressed and an extrusion working section which are communicated up and down and penetrate through the extrusion die are arranged in the extrusion die; the extrusion die is arranged on the lower die base, and the upper die base is connected with an upper extrusion die rod which can move along with the upper die base and extend into the extrusion die; the method is characterized in that: an ejector rod which penetrates through the lower die base and can stretch into the extrusion die to extend to a cavity to be molded for bearing materials when the extrusion die is extruded, and the ejector rod is connected with a telescopic oil cylinder which drives the ejector rod to vertically move so as to be lowered to the lower end of an extrusion working section in the extrusion process and provide back pressure;
the extrusion die adopts a half die structure form and comprises a left half die and a right half die which are divided into a half part and a half part, the two half dies can be arranged on the lower die seat in a sliding mode in an opposite direction and in an opposite direction so as to facilitate loading and unloading, and the cavity to be pressed and the extrusion working section are respectively processed on the two half dies in a half-and-half mode so as to form the cavity to be pressed and the extrusion working section when the two half dies are closed in an opposite direction.
2. The parking arm manufacturing mold structure according to claim 1, characterized in that: the two split molds are respectively connected with the horizontal driving mechanism so as to realize the opposite and back-to-back sliding action of the two split molds on the lower mold base.
3. The parking arm manufacturing mold structure according to claim 2, characterized in that: the horizontal driving mechanism is a telescopic cylinder.
4. The parking arm manufacturing mold structure according to claim 1, characterized in that: a lower die gasket is arranged between the extrusion die and the lower die base, the lower die gasket is fixedly connected to the lower die, a concave sliding groove is formed in the upper surface of the lower die gasket, convex sliding rails matched with the sliding grooves are respectively arranged on the lower surfaces of the two dies, and the two dies are arranged on the lower die gasket and can slide along the moving direction of the matching of the sliding rails and the sliding grooves; and the ejector rod penetrates through the lower die gasket.
5. The parking arm manufacturing mold structure according to claim 1, characterized in that: the profile shape of the upper surface of the ejector rod corresponds to the cross section of the extrusion working section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020025604.2U CN211386349U (en) | 2020-01-07 | 2020-01-07 | Parking arm manufacturing mold structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020025604.2U CN211386349U (en) | 2020-01-07 | 2020-01-07 | Parking arm manufacturing mold structure |
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| CN211386349U true CN211386349U (en) | 2020-09-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112620503A (en) * | 2020-11-02 | 2021-04-09 | 无锡昌至盛机械制造有限公司 | Punch press hydraulic pressure autosegregation harbour workstation |
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2020
- 2020-01-07 CN CN202020025604.2U patent/CN211386349U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112620503A (en) * | 2020-11-02 | 2021-04-09 | 无锡昌至盛机械制造有限公司 | Punch press hydraulic pressure autosegregation harbour workstation |
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