CN111230026A

CN111230026A - Special vertical finish forging die for deep blind hole double-coupling tooth blank

Info

Publication number: CN111230026A
Application number: CN202010180675.4A
Authority: CN
Inventors: 吴克成; 周亚夫; 杨柳
Original assignee: Sichuan Hongxin Energy Equipment Manufacturing Co ltd
Current assignee: Sichuan Hongxin Energy Equipment Manufacturing Co ltd
Priority date: 2020-03-14
Filing date: 2020-03-14
Publication date: 2020-06-05

Abstract

The invention discloses a vertical finish forging die special for a deep blind hole double-coupling gear blank, which comprises an upper convex module, a lower concave module, a material ejecting mechanism, an upper punch, a left half die and a right half die, wherein the outer sides of the left half die and the right half die are respectively provided with an opening and closing cylinder, and can be opened and closed under the action of the opening and closing cylinder; an elastic locking device is further installed below the upper template, and the elastic locking device comprises a locking sleeve, a sliding rod and a compression spring. The finish forging die is used as an important part in the vertical forging process of the double-coupling gear blank, and guarantees are provided for realizing vertical forging, reducing working procedures, saving material cost and saving machining cost.

Description

Special vertical finish forging die for deep blind hole double-coupling tooth blank

Technical Field

The invention relates to the technical field of forging dies, in particular to a finish forging die used in a forging process of a double-coupling gear blank with a deep blind hole.

Background

As shown in fig. 4, in the dual-coupling gear with the deep blind hole, the conventional manufacturing method is to firstly use horizontal forging, but the horizontal forging cannot forge the deep blind hole, and only forge a dual-coupling gear blank in a full core state; and finishing the deep blind hole by machining after forging. In addition, the horizontal forging also needs to be performed with edge cutting, which increases the cost of a set of edge cutting die, thus causing long process flow, high material cost and high subsequent machining cost.

Disclosure of Invention

The invention aims to provide a finish forging die used in the vertical forging process of a dual-coupling gear blank, which is used for carrying out finish forging forming on the blank after material collection and pre-forging, is used as one of important processes of a whole set of forging die, and provides guarantee for realizing vertical forging, reducing processes, saving material cost and machine cost.

Therefore, the technical scheme adopted by the invention is as follows: a vertical finish forging die special for a deep blind hole double-coupling gear blank comprises an upper convex die block fixedly mounted below an upper die plate, a lower concave die block fixedly mounted above a lower die plate and a material ejecting mechanism vertically extending into the bottom of a cavity of the lower concave die block, wherein an upper punch is mounted in the middle of the upper convex die block, a left half die and a right half die are arranged above the lower concave die block, the outer sides of the left half die and the right half die are respectively provided with an opening and closing cylinder and can be opened and closed under the action of the opening and closing cylinder, the upper convex die block, the upper punch, the left half die, the right half die and the lower concave die block can jointly enclose a finish forging die cavity, the finish forging die cavity comprises a deep blind hole, a gear wheel position cavity at the upper part, a pinion position cavity at the lower part and a cylinder with a draft angle, and the pinion position cavity; an elastic locking device is further mounted below the upper template and comprises a locking sleeve, a sliding rod and a compression spring, the upper end of the sliding rod is fixed on the upper template, and the compression spring and the locking sleeve are vertically sleeved on the sliding rod in a sliding manner;

when the left half die and the right half die are closed and the upper die plate drives the upper convex die block, the upper punch, the upper die block pressing ring and the elastic locking device to move downwards to the effective working stroke of the finish forging die, the inner conical surface of the locking sleeve can be in complete contact with the outer conical surfaces of the left half die and the right half die, so that the left half die and the right half die are locked; and when the upper die plate continues to move downwards, the compression spring is continuously compressed, the locking sleeve is kept still, the locking force is increased, the upper convex die block and the upper punch continue to move downwards, the upper punch penetrates into the finish forging die cavity and enables the cavity at the lower pinion position of the blank to be filled with materials, the upper convex die block and the upper punch continue to move downwards again until the upper convex die block is contacted with the left half die and the right half die, and the blank is finished in finish forging forming.

Preferably, the upper male die block is of an internal and external split structure and comprises an upper male die main body and an upper male die outer sleeve, the bottom surface of the upper male die outer sleeve is higher than that of the upper male die main body, when the dies are closed, the upper male die main body is inserted between the left and right dies, and the bottom surface of the upper male die outer sleeve is in contact with the top surfaces of the left and right dies. The replacement frequency of the upper male die main body is higher than that of the upper male die outer sleeve, and a split structure is adopted, so that the use cost is reduced; the contact surfaces of the upper male die outer sleeve and the left and right half dies move upwards relative to the bottom surface of the upper male die main body, and further flash is avoided.

Preferably, the upper punch and the upper male die main body are provided with upper end heads, the upper end heads are sequentially sleeved together from inside to outside and then inserted into the upper male die positioning seat, the upper male die outer sleeve is pressed on the step surface of the upper male die main body and locked on the upper male die positioning seat through screws, and the upper male die positioning seat is locked on the upper die plate through screws, so that the upper male die block is installed on the upper die plate; the lower concave module is provided with a lower end head, the lower end head is inserted into the lower concave module positioning seat, the lower concave module positioning seat is inserted into the lower template, and the lower module pressing ring is pressed on the step surface of the lower concave module and is locked on the lower template through screws, so that the lower concave module is installed on the lower template. The upper convex module is of a split structure, a hole does not need to be formed in the upper convex die body, the strength of the upper convex die body is improved, and the upper convex die is very convenient to install by adopting a step surface reverse buckling structure and combining with a screw for locking; the lower concave module adopts the lower module clamping ring and is combined with a screw to be installed and fixed on the lower template, so that holes are avoided being formed in the lower concave module, the strength of the lower module is ensured, the replacement and installation of different molds on the lower module can be realized, the universality is good, the installation is convenient and fast, and the stability and the reliability are realized.

Further preferably, a lower cushion block is arranged between the lower concave die positioning seat and the lower template. Because the lower die block is a main force bearing part in the forging process, the strength requirement is high, the cushion block is additionally arranged, the cushion block is worn and replaced in the using process, the lower die plate does not need to be replaced, and the service life of the lower die plate is further prolonged.

Further preferably, liftout mechanism adopts split type structure, including kicking block and liftout pole down, the lower extreme of kicking block has the anticreep arch down, and the upper end of liftout pole supports on the anticreep is protruding, the bellied stroke range of anticreep is between recessed module and lower cushion block. The ejector rod is a common part on the press machine, adopts a split structure, and is equivalent to only needing to add a lower ejector block on the existing press machine, thereby realizing universality.

Preferably, at least two groups of guide mechanisms are arranged between the upper template and the lower template, and each group of guide mechanisms consists of a guide sleeve and a guide column.

Further preferably, the elastic locking device further comprises a locking sleeve positioning plate and a sliding sleeve, the locking sleeve positioning plate is fixedly sleeved outside the locking sleeve, the locking sleeve positioning plate is slidably mounted on the sliding rod through the sliding sleeve and is locked and prevented from falling through a nut, and therefore the sliding mounting of the locking sleeve on the sliding rod is achieved.

Preferably, the front end of the opening and closing cylinder is connected with the corresponding left and right half dies through a connecting block, the rear end of the opening and closing cylinder is fixed on an upright post of an L-shaped cylinder mounting seat, and a bottom plate of the cylinder mounting seat is mounted on the lower template through a cylinder positioning seat.

The invention has the beneficial effects that: the finish forging die cavity comprises a deep blind hole, a gear wheel position cavity at the upper part, a pinion gear position cavity at the lower part and a cylinder with a drawing slope at the bottom, wherein the pinion gear position cavity at the lower part is over against the interface of the left half die, the right half die and the lower concave die, so that a blank with two gear positions and one deep blind hole can be formed by finish forging, smooth demoulding can be ensured, and the finish forging die cavity is an important ring in the process of vertically forging the double-shaft gear with the deep blind hole. The finish forging die is applied to vertical forging of a double-coupling gear blank with a deep blind hole, so that the quality of a forged piece is improved, the working procedures are reduced, and the material cost and the machining cost are saved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a sectional view a-a of fig. 1.

Fig. 3 is a schematic view of a blank formed by finish forging according to the present invention.

Fig. 4 is a schematic structural diagram of a machined double-coupling gear with a deep blind hole.

FIG. 5 is a process flow diagram of vertical forging of a dual coupling tooth blank with deep blind holes.

Detailed Description

The invention will be further illustrated by the following examples in conjunction with the accompanying drawings:

referring to fig. 1 and 2, the vertical finish forging die specially used for the deep blind hole dual-coupling gear blank mainly comprises an upper die plate 1, an upper convex die block 2, a lower die plate 3, a lower concave die block 4, a lower concave die positioning seat 5, an upper convex die positioning seat 6, a lower die block pressing ring 7, a cylinder positioning seat 8, a lower ejector block 9, an ejector rod 10, a lower cushion block 11, a guide sleeve 12, a guide column 13, an upper punch 14, a cylinder mounting seat 15, a left half die 16, a right half die 17, an opening and closing cylinder 18, a slide rod 19, a compression spring 20, a locking sleeve positioning plate 21, a sliding sleeve 22, a connecting block 23 and a locking sleeve 24.

The upper convex module 2 is fixedly arranged below the upper template 1, and the lower concave module 4 is fixedly arranged above the lower template 3. The material ejecting mechanism can vertically extend into the bottom of the cavity of the concave module 4 and is used for ejecting the formed blank. The upper punch 14 is mounted in the middle of the upper male die block 2.

A left half-die 16 and a right half-die 17 are arranged above the lower concave die 4. The outer sides of the left half mold 16 and the right half mold 17 are respectively provided with an opening and closing cylinder 18, and the left half mold 16 and the right half mold 17 can be opened and closed (separated or folded) under the driving of the corresponding opening and closing cylinders 18.

The upper male die block 2, the upper punch 14, the left half die 16, the right half die 17 and the lower female die block 4 can jointly enclose a finish forging die cavity. The finish forging die cavity is used for forming a finish forging blank, the finish forging die cavity comprises a deep blind hole, a gear wheel position cavity at the upper part, a pinion gear position cavity at the lower part and a cylinder with a draft angle at the bottom, and the pinion gear position cavity at the lower part is over against the interfaces of the left half die 16, the right half die 17 and the lower concave die block 4, so that the blank can be smoothly demoulded under the action of the material ejecting mechanism after the left half die 16 and the right half die 17 are separated.

An elastic locking device is further installed below the upper template 1, and the elastic locking device mainly comprises a locking sleeve 24, a sliding rod 19 and a compression spring 20. The upper end of the slide bar 19 is fixed on the upper template 1, and the compression spring 20 and the locking sleeve 24 are sleeved on the slide bar 19 in a vertically sliding manner.

When the left half die 16 and the right half die 17 are closed, and the upper template 1 drives the upper convex die block 2, the upper punch 14, the upper die block pressing ring 6 and the elastic locking device to move downwards to the effective working stroke h1 of the finish forging die, the inner conical surface of the locking sleeve 24 can be completely contacted with the outer conical surfaces of the left half die 16 and the right half die 17, so that the left half die 16 and the right half die 17 are locked, and the left half die 16 and the right half die 17 are prevented from being separated. When the upper die plate 1 continues to descend, the compression spring 20 continues to be compressed, the locking sleeve 24 is kept still, the locking force is increased, the upper convex die block 2 and the upper punch 14 continue to descend, the upper punch 14 penetrates into the finish forging die cavity and enables the cavity of the lower pinion position of the blank to be filled with materials, the upper convex die block 2 and the upper punch 14 continue to descend again until the upper convex die block 2 is in contact with the left half die 16 and the right half die 17, and the blank is finished in finish forging forming.

Preferably, the upper male mold block 2 is of an internal and external split structure, and comprises an upper male mold body 2a and an upper male mold jacket 2b, wherein the bottom surface of the upper male mold jacket 2b is higher than the bottom surface of the upper male mold body 2a, when the mold is closed, the upper male mold body 2a is inserted between the left half mold 16 and the right half mold 17, and the bottom surface of the upper male mold jacket 2b is in contact with the top surfaces of the left half mold 16 and the right half mold 17. Of course, the upper male die block 2 may be of a one-piece construction.

For convenient installation, the upper punch 14 and the upper male die main body 2a are respectively provided with an upper end head, are sequentially sheathed together from inside to outside through the upper end heads and then are inserted into the upper male die positioning seat 6, and the upper male die outer sleeve 2b is pressed on the step surface of the upper male die main body 2a and is locked on the upper male die positioning seat 6 through screws; the upper convex die positioning seat 6 is locked on the upper die plate 1 through screws, so that the upper convex die block 2 is installed on the upper die plate 1.

The lower concave module 4 is provided with a lower end which is inserted into the lower concave module positioning seat 5, the lower concave module positioning seat 5 is inserted into the lower template 3, and the lower module pressing ring 7 is pressed on the step surface of the lower concave module 4 and is locked on the lower template 3 through a screw, so that the lower concave module 4 is installed on the lower template 3.

Preferably, a lower cushion block 11 is arranged between the lower concave die positioning seat 5 and the lower template 3.

The material ejecting mechanism is preferably of a split structure and consists of a lower ejecting block 9 and an ejecting rod 10. The lower end of the lower ejector block 9 is provided with an anti-falling bulge 9a, the upper end of the ejector rod 10 abuts against the anti-falling bulge 9a, and the stroke range of the anti-falling bulge 9a is between the lower concave module 4 and the lower cushion block 11. The stroke of the ejection mechanism is determined by the stroke range h of the anti-drop bulge 9 a.

At least two groups of guide mechanisms, preferably four groups of guide mechanisms, are arranged between the upper template 1 and the lower template 3. Each group of guide mechanisms consists of a guide sleeve 12 and a guide post 13 and guides the up-and-down movement of the upper template 1 and the upper convex module 2.

Preferably, the elastic locking device further comprises a locking sleeve positioning plate 21 and a sliding sleeve 22, the locking sleeve positioning plate 21 is fixedly sleeved outside the locking sleeve 24, the locking sleeve positioning plate 21 is slidably mounted on the sliding rod 19 through the sliding sleeve 22 and locked and prevented from falling through a nut, and therefore the sliding mounting of the locking sleeve 24 on the sliding rod 19 is achieved.

The front end of the opening and closing cylinder 18 is connected with the corresponding left and right half dies 16 and 17 through a connecting block 23, the rear end of the opening and closing cylinder 18 is fixed on an upright post of an L-shaped cylinder mounting seat 15, and the bottom plate of the cylinder mounting seat 15 is mounted on the lower template 3 through a cylinder positioning seat 8.

The die comprises an upper die plate 1, an upper convex die block 2, a lower die plate 3, a lower concave die block 4, a lower concave die positioning seat 5, an upper convex die positioning seat 6, a lower die block pressing ring 7, an air cylinder positioning seat 8, a lower top block 9, a top material rod 10, a lower cushion block 11, a guide sleeve 12, a guide column 13, an upper punch 14, an air cylinder mounting seat 15, a left half die 16, a right half die 17, an opening and closing air cylinder 18, a sliding rod 19, a compression spring 20, a pressing sleeve positioning plate 21, a sliding sleeve 22, a connecting block 23 and a locking sleeve 24.

The blank formed by the finish forging die is shown in fig. 3. Referring to fig. 5, a vertical forging method is adopted, and the double-coupling gear blank with the deep blind hole can be directly forged through the working procedures of blanking, heating to the forging temperature, collecting materials, pre-forging and finish forging. The finish forging process is as follows: and the left and right opening and closing cylinders 18 move towards the center of the die simultaneously to enable the left half die 16 and the right half die 17 to be matched with the fixed lower die block 4 to form a complete lower die cavity, a blank after the pre-forging process is finished is loaded into the lower die cavity, an upper slide block of the press machine drives an upper die plate 1, an upper convex die block 2, an upper punch 14 and an elastic locking device of a finish forging die to move downwards to the effective working stroke of the die, the inner conical surface of the locking sleeve 24 is completely contacted with the outer conical surfaces of the left half die 16 and the right half die 17 to lock the left half die and the right half die, and the left half die and the right half die. The slide block of the press continues to move downwards, at the moment, the compression spring 20 is continuously compressed, the locking sleeve 24 is kept still, the locking force is increased, the upper convex die block 2 and the upper punch 14 continue to move downwards, the upper punch 14 starts to contact the blank and extends into the blank, so that a cavity at the lower pinion position of the blank is filled with materials, the upper convex die block 2 and the upper punch 14 continue to move downwards again until the lower plane of the outer sleeve 2b of the upper convex die contacts with the upper planes of the left half die 16 and the right half die 17, and the blank finishes finish forging forming at the moment; when the upper slide block of the press drives the finish forging die upper template 1, the upper convex die block 2, the upper punch 14 and the elastic locking device to move upwards to the effective working stroke of the die, the inner conical surface of the locking sleeve 24 begins to be separated from the outer conical surfaces of the left half die 16 and the right half die 17, the slide block continues to drive the upper template 1, the upper convex die block 2, the upper punch 14 and the elastic locking device to move upwards and return to the initial position, the left and right opening and closing air cylinders 18 move to return to the left and right directions to separate the left half die 16 and the right half die 17, the ejection mechanism moves upwards to eject a blank, the blank is manually clamped and taken out.

Claims

1. The utility model provides a vertical finish forging die of dark blind hole double coupling tooth blank is exclusively used in, includes last convex mould piece (2) of fixed mounting in cope match-plate pattern (1) below, fixed mounting is in lower bolster (3) top sunken module (4) to and the vertical liftout mechanism that stretches into sunken module (4) die cavity bottom, the mid-mounting of last convex mould piece (2) has last drift (14), its characterized in that: a left half die (16) and a right half die (17) are arranged above the lower concave die (4), the outer sides of the left half die (16) and the right half die (17) are respectively provided with an opening and closing cylinder (18) and can be opened and closed under the action of the opening and closing cylinder (18), the upper convex die (2), the upper punch (14), the left half die (16), the right half die (17) and the lower concave die (4) can jointly enclose a finish forging die cavity, the finish forging die cavity comprises a deep blind hole, a large gear position cavity at the upper part, a small gear position cavity at the lower part and a cylinder with a drawing draft at the bottom, and the small gear position cavity at the lower part is over against the interface of the left half die (16) and the right half die (17) and the lower concave; an elastic locking device is further mounted below the upper template (1), the elastic locking device comprises a locking sleeve (24), a sliding rod (19) and a compression spring (20), the upper end of the sliding rod (19) is fixed on the upper template (1), and the compression spring (20) and the locking sleeve (24) are vertically sleeved on the sliding rod (19) in a sliding manner;

when the left half die and the right half die (16 and 17) are closed, the upper template (1) drives the upper convex die block (2), the upper punch (14), the upper die block pressing ring (6) and the elastic locking device to move downwards to the effective working stroke of the finish forging die, the inner conical surface of the locking sleeve (24) can be in complete contact with the outer conical surfaces of the left half die and the right half die (16 and 17), so that the left half die and the right half die (16 and 17) are locked; when the upper die plate (1) continues to descend, the compression spring (20) continues to be compressed, the locking sleeve (24) is kept still, the locking force is increased, the upper convex die block (2) and the upper punch (14) continue to descend, the upper punch (14) penetrates into a finish forging die cavity and enables a pinion position cavity at the lower part of the blank to be filled with materials, the upper convex die block (2) and the upper punch (14) continue to descend again until the upper convex die block (2) is in contact with the left half die (16) and the right half die (17), and the blank is finished in finish forging forming.

2. The vertical finish forging die special for the deep blind hole double-coupling gear blank according to claim 1, wherein: the upper convex module (2) adopts an internal and external split structure and comprises an upper convex module main body (2a) and an upper convex module outer sleeve (2b), the bottom surface of the upper convex module outer sleeve (2b) is higher than that of the upper convex module main body (2a), when the upper convex module main body (2a) is inserted between the left half mold and the right half mold (16 and 17), and the bottom surface of the upper convex module outer sleeve (2b) is contacted with the top surfaces of the left half mold and the right half mold (16 and 17).

3. The vertical finish forging die special for the deep blind hole double-coupling gear blank according to claim 2, wherein: the upper punch head (14) and the upper male die main body (2a) are respectively provided with an upper end head, the upper end heads are sequentially sleeved together from inside to outside through the upper end heads and then inserted into the upper male die positioning seat (6), the upper male die outer sleeve (2b) is pressed on the step surface of the upper male die main body (2a) and locked on the upper male die positioning seat (6) through screws, and the upper male die positioning seat (6) is locked on the upper template (1) through screws, so that the upper male die block (2) is installed on the upper template (1); the lower concave module (4) is provided with a lower end head, the lower end head is inserted into the lower concave module positioning seat (5), the lower concave module positioning seat (5) is inserted into the lower template (3), and the lower module pressing ring (7) is pressed on the step surface of the lower concave module (4) and locked on the lower template (3) through a screw, so that the lower concave module (4) is installed on the lower template (3).

4. The vertical finish forging die special for the deep blind hole double-coupling gear blank according to claim 3, wherein: and a lower cushion block (11) is arranged between the lower concave die positioning seat (5) and the lower template (3).

5. The vertical finish forging die special for the deep blind hole double-coupling gear blank according to claim 1, wherein: the liftout mechanism adopts split type structure, including kicking block (9) and liftout pole (10) down, the lower extreme of kicking block (9) has anticreep arch (9a) down, and the upper end of liftout pole (10) is supported on anticreep arch (9a), the stroke scope of anticreep arch (9a) is between recessed module (4) and lower cushion (11).

6. The vertical finish forging die special for the deep blind hole double-coupling gear blank according to claim 1, wherein: at least two groups of guide mechanisms are arranged between the upper template (1) and the lower template (3), and each group of guide mechanisms consists of a guide sleeve (12) and a guide column (13).

7. The vertical finish forging die special for the deep blind hole double-coupling gear blank according to claim 1, wherein: the elastic locking device further comprises a locking sleeve positioning plate (21) and a sliding sleeve (22), the locking sleeve positioning plate (21) is fixedly sleeved outside the locking sleeve (24), and the locking sleeve positioning plate (21) is slidably mounted on the sliding rod (19) through the sliding sleeve (22) and is locked and prevented from falling through a nut, so that the sliding mounting of the locking sleeve (24) on the sliding rod (19) is realized.

8. The vertical finish forging die special for the deep blind hole double-coupling gear blank according to claim 1, wherein: the front end of the opening and closing air cylinder (18) is connected with the corresponding left and right half dies (16 and 17) through a connecting block (23), the rear end of the opening and closing air cylinder (18) is fixed on an upright post of an L-shaped air cylinder mounting seat (15), and a bottom plate of the air cylinder mounting seat (15) is installed on the lower template (3) through an air cylinder positioning seat (8).