CN211990735U

CN211990735U - 5G21 intermediate shaft wedge cross rolling does not have finishing section rolling die

Info

Publication number: CN211990735U
Application number: CN202020456099.7U
Authority: CN
Inventors: 刘永滨; 魏斌; 魏光禄
Original assignee: Shandong Huifeng Transmission Co ltd
Current assignee: Shandong Huifeng Transmission Co ltd
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2020-11-24
Anticipated expiration: 2030-04-01

Abstract

The utility model discloses a 5G21 intermediate shaft wedge cross rolling finishing section-free rolling die, which comprises a die body and a left and a right 5G21 intermediate shaft blank rolling die; the method is characterized in that: the left and right 5G21 intermediate shaft blank rolling dies are composed of a wedging section, a successive outward extending wide section and a shearing section which are sequentially arranged from a wedging end, the width expanding angle of the middle section of the wedging section is 13 degrees 30 degrees, the width expanding angles of the successive outward extending wide section and the shaft-by-shaft section extension are all 13 degrees 30 degrees, and the extension forming angle of the tail end part of the successive outward extending wide section relative to the shaft end of the blank piece is 33 degrees. The utility model discloses owing to do not establish the finishing section, the total arc length of mould obviously shortens, and the cost of manufacture obviously reduces, and technology is simplified, has also reduced inside loose probability, has improved product quality.

Description

5G21 intermediate shaft wedge cross rolling does not have finishing section rolling die

Technical Field

The utility model relates to an improvement of jackshaft wedge cross rolling mould, specifically speaking are 5G21 jackshaft wedge cross rolling does not have finishing section rolling mould, its cost of manufacture that can reduce wedge cross rolling mould, sparingly mould material, reduce the inside loose probability of 5G21 jackshaft blank.

Background

The 5G21 intermediate shaft is an automobile transmission accessory, in the wedge cross rolling production, two blanks of a left 5G21 intermediate shaft blank 1 and a right 5G21 intermediate shaft blank 2 are rolled at one time, as shown in figure 1, the left 5G21 intermediate shaft blank 1 and the right 5G21 intermediate shaft blank 2 are symmetrical relative to the longitudinal center line 7 of a rolling die, the left 5G21 intermediate shaft blank 1 and the right 5G21 intermediate shaft blank 2 are both composed of a shaft 3 and a plurality of gear ring tables 4, and the shaft 3 and the gear ring tables 4 are rolled integrally. Since the 5G21 intermediate shaft is provided with a plurality of gear ring tables 4 and has a complex shape, the production and the molding are difficult. The cross wedge rolling process has the advantages of steel saving, simplified process, high production efficiency, energy saving and low production cost, so the cross wedge rolling process is widely applied to rolling of automobile shaft parts and is also applied to rolling of 5G21 intermediate shafts. At present, the 5G21 intermediate shafts produced in our company are also rolled by a cross wedge rolling process, and the used 5G21 intermediate shaft cross wedge rolling die is expanded, as shown in fig. 2, 3 and 4, and comprises a die body 5 and a left 5G21 intermediate shaft blank rolling die 6 and a right 5G21 intermediate shaft blank rolling die 6; the die body 5 consists of 5 arc-shaped steel plates; the left and right 5G21 intermediate shaft blank rolling dies 6 are distributed on the die body 5, the left and right 5G21 intermediate shaft blank rolling dies 6 are composed of a wedging section 8, a successive outer extension wide section 9, a finishing section 10 and a shearing section 11 which are sequentially arranged along the rolling direction, in the figure 2, the wedging section 8 is the position from A to B, the successive outer extension wide section 9 is the position from B to C, the finishing section 10 is the position from C to D, and the shearing section 11 is the position from D to E; wherein: the spreading angles a of the middle part of the wedging section 8 along the F-F direction cross section are symmetrical left and right, the angle values of the spreading angles a are both 9 degrees and 20 degrees, meanwhile, the spreading angles a of the shaft-by-shaft extension of the successive outward extending wide section 9 are both 9 degrees and 20 degrees, the angle value of the extension forming angle b of the tail end part of the successive outward extending wide section 9 relative to the shaft end of the blank is 28 degrees, and the left and right two 5G21 intermediate shaft blank rolling dies 6 are symmetrical left and right relative to the longitudinal center line 7. The left and right two 5G21 intermediate shaft blank rolling dies have the following defects: because the extension angle a and the extension forming angle b relative to the shaft end of the blank are both small, the extension force is insufficient, when the blank is rolled to the C-C section position of the gradual extension wide section 9, the 5G21 intermediate shaft blank is already formed, but the surface is somewhat rough, so that a finishing section 10 is required to be arranged after the C-C section of the 5G21 intermediate shaft die, and the surface of the 5G21 intermediate shaft blank is smooth by the continuous rolling and rolling of the finishing section 10; however, because of the finishing section 10, the arc length of the finishing section 10 is 800mm, which accounts for 13.3% of the total arc length A-E of the left and right 5G21 intermediate shaft blank rolling dies 2, and the thickness is 100mm, the die body 5 only consists of 5 arc-shaped steel plates, the materials of the die are increased, and because the finishing section 10 has a plurality of steps, the manufacturing cost of the die is increased; as the 5G21 intermediate shaft blank is only rolled in the finishing section 10, the practical experience proves that the internal loosening probability of the 5G21 intermediate shaft blank can be increased due to the roller pressure, and the longer the rolling distance is, the more obvious the internal loosening probability is increased, so that the rigidity of a rolled piece is influenced, and in the production process, the increased internal loosening probability can be verified to exist through multiple tests of a flaw detector, so that the quality of the 5G21 intermediate shaft blank product is influenced by the existence of the finishing section 10.

The search shows that no report exists at present that the probability of internal looseness of a 5G21 intermediate shaft rolling blank can be reduced, the rolling quality of the 5G21 intermediate shaft blank can be improved, the material consumption of a die can be reduced, the manufacturing cost of the die can be reduced, and the 5G21 intermediate shaft wedge cross rolling die without a finishing section is simple in remanufacturing process.

Disclosure of Invention

An object of the utility model is to provide a can reduce the loose probability of 5G21 jackshaft rolling blank, improve the rolling quality of 5G21 jackshaft blank, can reduce the mould again and use the material, reduce mould cost of manufacture, simple process's 5G21 jackshaft wedge cross rolling does not have the finishing section and rolls the mould moreover.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the 5G21 intermediate shaft wedge cross rolling finishing section-free rolling die comprises a die body, a left 5G21 intermediate shaft blank rolling die and a right 5G21 intermediate shaft blank rolling die, wherein the left 5G21 intermediate shaft blank rolling die and the right 5G21 intermediate shaft blank rolling die are arranged on the die body and are symmetrical left and right relative to a longitudinal center line; the method is characterized in that: the left and right 5G21 intermediate shaft blank rolling dies are composed of a wedging section, a successive outer extension wide section and a shearing section which are sequentially arranged from a wedging end, the width expansion angle of the middle section of the wedging section is 13 degrees 30 ', the middle section of the wedging section is symmetrical left and right relative to a longitudinal center line, each width expansion angle of the successive outer extension wide section extending outwards from the shaft section is 13 degrees 30', the tail end part of the successive outer extension wide section is 33 degrees relative to the outer extension forming angle of the shaft end of the blank piece, and the tail end part of the successive outer extension wide section is symmetrical left and right relative to the longitudinal center line.

The die body consists of 4 arc-shaped steel plates.

The beneficial effects of the utility model reside in that: compared with the prior 5G21 intermediate shaft wedge cross rolling die, the utility model discloses because no longer establish the finishing section, but by the extension section of extending gradually directly transition to the shearing section, so make the material of mould reduce obviously, the total arc length of mould shortens obviously, the cost of manufacture obviously reduces, the technology is simplified; meanwhile, as the widening angle and the forming angle are enlarged, and the extension pressure is increased, the 5G21 intermediate shaft blank can be formed at an accelerated speed, so that the tail end position of the gradual outer extension wide section of the intermediate shaft blank meets the qualified requirement; in addition, because the finishing section is cancelled, the rolling of the 5G21 intermediate shaft blank is reduced, the probability of internal loosening is reduced, and the product quality is improved.

Drawings

FIG. 1 is a schematic structural plan view of a left intermediate shaft blank and a right intermediate shaft blank of 5G21 in one-time rolling;

FIG. 2 is a schematic view of the development structure of a currently used intermediate shaft cross wedge rolling die of 5G 21;

FIG. 3 is an enlarged view of a cross-section of the structure taken along the direction F-F in FIG. 2;

FIG. 4 is an enlarged schematic view of the structural section at the C-C position at the end of successive outwardly extending wide sections of FIG. 2 and the corresponding blank rolled into that position;

fig. 5 is a structural development schematic diagram of a 5G21 intermediate shaft cross wedge rolling die of the invention;

FIG. 6 is an enlarged schematic view of the cross-sectional structure of the present invention along the position G-G in FIG. 5;

fig. 7 is an enlarged schematic view of the structural section at the C-C position at the end of the successive outward extending wide sections of the present invention in fig. 5 and the corresponding blank when it is rolled to this position.

In the figure: 1. left 5G21 center shaft blank; 2. right 5G21 center shaft blank; 3. a shaft; 4. a gear ring table; 5. a mold body; 6. the left and right two intermediate shaft blank rolling dies are 5G 21; 7. a longitudinal centerline; 8. a wedging section; 9. gradually extending the wide section outwards; 10. a finishing section; 11. and (6) cutting into sections.

Detailed Description

The utility model is made by referring to fig. 5, 6 and 7, and is used for producing a left and a right two pieces of 5G21 intermediate shaft blanks as shown in fig. 1. In fig. 5, the wedge section 8 is at a position a-B, the successive outward extending wide section 9 is at a position B-C, and the shear section 11 is at a position C-E.

The rolling die for the wedge cross rolling of the 5G21 intermediate shaft without the finishing section comprises a die body 5 and a left 5G21 intermediate shaft blank rolling die 6 and a right 5G21 intermediate shaft blank rolling die 6, wherein the left 5G21 intermediate shaft blank rolling die 6 and the right 5G21 intermediate shaft blank rolling die 6 are symmetrical left and right relative to a longitudinal center line 7; the method is characterized in that: the left and right middle shaft blank rolling dies 6 of 5G21 are composed of a wedging section 8, a successive outward extending wide section 9 and a shearing section 11 which are sequentially arranged from a wedging end, wherein an expanding angle a of a middle section of the wedging section 8 is 13 degrees 30 'and is symmetrical left and right relative to a longitudinal center line 7, as shown in FIG. 6, each expanding angle a of the successive outward extending wide section 9 extending from the shaft to the shaft is 13 degrees 30', and a tail end part of the successive outward extending wide section 9 is 33 degrees relative to an extending forming angle b of a blank of the shaft end and is symmetrical left and right relative to the longitudinal center line 7.

The die body 5 is composed of 4 arc-shaped steel plates.

When the utility model is used, the gradual external extension wide section 9 is directly transited to the shearing section 11, and the middle part has no interval, namely, the finishing section is not arranged between the gradual external extension wide section 9 and the shearing section 11, so that the total arc length of the left and right two 5G21 intermediate shaft blank rolling dies 6 can be shortened by 13.3 percent, thus, the die body 5 consists of 4 arc steel plates, 1 arc steel plate is saved, the arc length is saved by 800mm, the thickness is 100mm, the steel weight is saved by 887kg, and the manufacturing cost is saved; the angle of the spread angle a of the middle part of the wedging section 8 along the G-G section is enlarged to 13 degrees 30 ', and simultaneously, the spread angles a of the shaft-by-shaft extension sections of the successive outward spread sections 9 are enlarged to 13 degrees 30', so that the extension pressure in the rolling process is increased, and the forming speed is accelerated; the tail end part of the gradual outward extending wide section 9 is enlarged to 33 degrees relative to the outward forming angle b of the shaft end of the blank to increase the pressure of the 5G21 intermediate shaft blank during forming and increase the surface smoothness of the intermediate shaft blank, so that the 5G21 intermediate shaft blank meets the qualified requirements and immediately enters the shearing section 11, and the joint of the left 5G21 intermediate shaft blank 1 and the right 5G21 intermediate shaft blank 2 is rolled and broken through the rolling of the shearing section 11. So far, two 5G21 intermediate shaft blanks are rolled, and the 5G21 intermediate shaft blanks rolled in this way have reduced internal porosity due to rolling without a finishing section.

Claims

The rolling die comprises a die body (5), a left 5G21 middle shaft blank rolling die (6) and a right 5G21 middle shaft blank rolling die (6), wherein the left 5G21 middle shaft blank rolling die and the right 5G21 middle shaft blank rolling die are arranged on the die body (5), and the left 5G21 middle shaft blank rolling die and the right 5G21 middle shaft blank rolling die are symmetrical left and right relative to a longitudinal central line (7); the method is characterized in that: the left and right 5G21 intermediate shaft blank rolling dies (6) are composed of a wedging section (8), a successive outward extending wide section (9) and a shearing section (11) which are sequentially arranged from a wedging end, the width angle (a) of the middle section of the wedging section (8) is 13 degrees 30 degrees, the width angles (a) of the successive outward extending wide sections (9) extending from the shaft sections are all 13 degrees 30 degrees, and the extension forming angle (b) of the tail end part of the successive outward extending wide section (9) relative to the shaft end of a blank is 33 degrees.
2. The 5G21 intermediate shaft wedge cross rolling finishing-section-free rolling die of claim 1, wherein: the die body (5) is composed of 4 arc-shaped steel plates.