CN111318632A

CN111318632A - Forged piece cutting device and cutting method

Info

Publication number: CN111318632A
Application number: CN201811529509.XA
Authority: CN
Inventors: 袁海平; 缪桃生; 王琪; 陶丽佳; 沈妍; 朱辊杰; 赵耀; 卞翔
Original assignee: JIANGSU HONGBAO FORGING CO Ltd
Current assignee: JIANGSU HONGBAO FORGING CO Ltd
Priority date: 2018-12-14
Filing date: 2018-12-14
Publication date: 2020-06-23

Abstract

The invention discloses a forging cutting device, which relates to the technical field of forging trimming and comprises the following components: the device comprises an upper die unit, a hub, a flash, a bridge bin part and a trimming female die, wherein the diameter of a parting surface of the hub is increased by at least 1 mm on the basis of national standards. Firstly, the hub is placed on the trimming female die, then the first, second and third resistance walls of the flash are tightly clamped and attached to the bridge bin to form fixation on the hub, the driving device is started, the lower die unit is driven to move downwards to evenly cut and flatten 1 mm more than the parting surface of the hub, the parting line steps are eliminated, then the cut hub falls into the trimming female die, the positioning effect without consumables is achieved, the pursuit of customers for evenly and attractively matching is met, and the maximization of commercial value is achieved.

Description

Forged piece cutting device and cutting method

Technical Field

The invention relates to the technical field of forged piece trimming, in particular to a forged piece cutting device.

Background

When a workpiece is machined on a lathe or other equipment, particularly when the parting surface of the automobile hub forging with the thickness less than 10 mm is machined, parting traces and parting steps cannot be formed on the parting surface of the forging due to user requirements and response to national innovation concepts.

Currently, as shown in fig. 1, circular closed forging is mostly adopted for forging such forgings, and then excess metal is cut off, but the method has the risk that burrs 42 generated by the closed forging are pressed into the forgings during trimming. With open forged trim, as shown in fig. 2, the parting line step 43 is evident at the parting plane of the forging due to the positioning and size requirements.

If the die parting line step of the die parting surface of the forge piece is to be eliminated, the forge piece formed by forging in the traditional method cannot be directly placed on the trimming die, the positioning is realized by the cutting edge of the trimming die, and the die parting surface of the forge piece cut by the upper die unit can be blocked by the cutting edge of the trimming die. If the plane flash in the prior art is used for positioning, manual positioning is needed, and during manual positioning, no blocking element or other elements capable of limiting the forge piece determine whether the placement is accurate or not, so that the accurate positioning is difficult, and during processing, the shape of the angle of the forge piece is extremely easy to cut, so that the front and back sizes are asymmetrical, the quality cannot be guaranteed, and the problem that the step of a parting line cannot be eliminated is solved. Therefore, the test needs to be repeated, and a large amount of labor is used for solving the problem that the parting line steps exist on the parting surface of the forge piece.

Disclosure of Invention

One purpose of the invention is to solve the problems of mold splitting traces and mold splitting steps on the mold splitting surface of the open forging hub.

The second purpose of the invention is to provide a trimming positioning method.

In order to achieve the purpose, the invention adopts the following technical scheme: a forging cut-off device comprising: a drive device; the upper die unit is connected with the driving device; the driving device can move relative to the trimming female die, and the trimming female die is provided with a bridge bin part; the overlap, the wheel hub die parting face is connected to the overlap, and the overlap includes: the first resistance wall is attached to the bridge bin part; the second resistance wall is connected with the side end of the first resistance wall and is attached to the bridge cabin part; and the third resistance wall is connected with the side end of the second resistance wall.

In the technical scheme, the hub is firstly placed on the trimming female die, then the first, second and third resistance walls of the flash are tightly clamped and attached to the bridge bin to form the positioning of the hub, the driving device is started to drive the lower die unit to move downwards to uniformly cut and flatten 1 mm more parting line steps of the hub, and then the cut hub falls into the trimming female die.

Further, in the embodiment of the invention, the center of the trimming concave die is provided with an accommodating space.

Further, in the embodiment of the invention, the bridge bin portion comprises a supporting platform, and the supporting platform is connected with the top end of the bridge bin portion facing to the center of the trimming female die.

Further, in the embodiment of the invention, the first resistance wall, the second resistance wall and the third resistance wall comprise positioning platforms, and the positioning platforms are connected with the top ends of the first resistance wall, the second resistance wall and the third resistance wall facing to the center of the trimming female die.

Further, in the embodiment of the present invention, the first resistance wall, the second resistance wall, and the third resistance wall include welts, and the welts are connected to bottoms of the first resistance wall, the second resistance wall, and the third resistance wall extending in a direction opposite to the bridge storage portion.

Further, in the embodiment of the present invention, the opposite end surfaces of the bridge bin portion are inclined to each other. Before the first resistance wall and the third resistance wall of the flash are tightly clamped and attached to the bridge bin part, precise mutual pre-alignment is not needed, the upper end part of the bridge bin part inclines towards the direction of the trimming female die, so the space at the upper end of the bridge bin part is narrowed, and the lower end of the first resistance wall and the lower end of the third resistance wall correspond to the lower end of the bridge bin part, so when alignment positioning is started, the left and right moving space of the first resistance wall and the third resistance wall is enlarged, the assembly difficulty is reduced, and the first resistance wall, the second resistance wall and the third resistance wall of the flash are tightly clamped and attached to the bridge bin part along the inclined edge generated by the inclination of the bridge bin part in the alignment positioning process, so that the assembly time is saved, labor is saved for assembly workers, the assembly quality is continued, the quality is prevented from being reduced when the wheel hub parting surface is uniformly cut flat, and the step of the parting.

Further, in the embodiment of the invention, the bridge bin part is provided with four long circular grooves, the long circular grooves are averagely positioned at four average positions in the bridge bin part, and the bridge bin part on the periphery of the long circular grooves inclines towards the long circular grooves. The long circular groove is used for matching the shape of the hub and providing visual indication for the installation and positioning of the flash, so that the situation that the installation deviation cannot be accurately positioned is prevented.

Further, in the embodiment of the invention, the hub is in a hot state, and the temperature is 900-1000 ℃.

Further, in the embodiment of the present invention, the driving force of the driving device is 80 tons or more.

Further, in the embodiment of the present invention, the bridge bin portion surrounds the accommodating space.

Furthermore, in the embodiment of the present invention, the inner edge of the supporting platform has a circular arc surface with a concave arc surface facing the bridge compartment portion.

Furthermore, in the embodiment of the present invention, the inner edge of the positioning platform has a circular arc surface with a concave arc surface facing the bridge compartment portion. The positioning platform is used for matching with the shape of the hub and providing visual indication for the hub when being cut off, can accurately determine the accuracy of a cut-off position when the upper die is cut off, and prevents the phenomenon that the positioning effect is reduced due to the fact that the flashing process does not reach the standard, so that the hub is damaged.

Further, in embodiments of the present invention, the support platform supports the positioning platform. The positioning platform is prevented from being stressed and deformed, and the cutting quality of the hub parting surface is prevented from being influenced.

The invention has the beneficial effects that:

firstly, utilize the waste material overlap that originally forges the back and produce to fix a position, realize the location effect of no consumptive material.

And secondly, 1 millimeter of the extra part of the wheel hub parting surface is uniformly cut off, so that the parting line steps are eliminated, the wheel hub parting surface is smooth and attractive, the pursuit of customers on uniform and attractive matching is also met, and the maximization of commercial value is realized.

In order to achieve the second purpose, the invention adopts the following technical scheme: a method of positioning, comprising the steps of:

pre-aligning, namely pre-aligning the center of the hub in a thermal state (the temperature is 900-1000 ℃) to the center surrounded by the bridge bin part;

placing the wheel hub, and downwards moving the wheel hub to be placed on the trimming female die;

positioning a hub, namely clamping and attaching a first resistance wall, a second resistance wall and a third resistance wall on the flash of the hub to a bridge bin part of the trimming female die to position the hub;

cutting off the hub, starting a driving device to drive an upper die unit to move downwards, and cutting off the 1 mm part of the split surface of the hub on the standard basis by utilizing the impulse force of more than 80 tons so as to cut off the step of the split surface of the hub split surface and completely eliminate the step of the split line;

and finishing the hub, and enabling the cut hub to fall into the trimming female die.

Drawings

In the attached drawings

FIG. 1 is a prior art circular closed forged hub

FIG. 2 is a prior art hub forged by open forging cut edges

FIG. 3 is a three-dimensional schematic view of a forging cutting device according to an embodiment of the invention

FIG. 4 is a three-dimensional schematic view of a trimming die and a bridge bin portion according to an embodiment of the invention

FIG. 5 is a three-dimensional schematic view of a hub and a flash according to an embodiment of the present invention

FIG. 6 is a schematic plan view of a hub with a split surface increased by 1 mm according to an embodiment of the present invention

FIG. 7 is a top view of FIG. 5

FIG. 8 is a partial cross-sectional view of a forge cutting apparatus according to an embodiment of the present invention

FIG. 9 is an assembly view of the hub and the trimming die according to the embodiment of the present invention

FIG. 10 is a schematic top view of a flash according to an embodiment of the present invention

FIG. 11 is a three-dimensional schematic view of a hub with a step of a parting line removed according to an embodiment of the present invention

1. Upper die unit 2, trimming die 21 and accommodating space

3. Bridge bin part 31, long circular groove 32 and supporting platform

4. Hub 41, parting surface 42, burr

43. Parting line step 5, flash 51 and first resistance wall

52. Second resistance wall 53, third resistance wall 54, location platform

55. Welt

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the embodiments of the invention and are not limiting of the embodiments of the invention.

In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred devices or elements must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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.

For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. But it is obvious. To one skilled in the art, the embodiments may be practiced without limitation to these specific details. In some instances, well-known methods and structures have not been described in detail so as not to unnecessarily obscure the embodiments. In addition, the embodiments may be used in combination with each other.

The first embodiment is as follows:

as shown in fig. 3, 4, 6 and 11, a forging cutting device comprises, from top to bottom: the device comprises a driving device, an upper die unit 1, a trimming female die 2, a bridge bin part 3 and a flash 5. The upper die unit 1 is connected with a driving device, the trimming female die 2 is aligned with the upper die unit 1, the driving device can move relative to the trimming female die 2, the trimming female die 2 is provided with a bridge bin part 3, and the flash 5 is connected with a die parting surface 41 of the hub 4. The flash 5 comprises: a first resistance wall 51, a second resistance wall 52 and a third resistance wall 53. The first resistance wall 51, the second resistance wall 52 and the third resistance wall 53 are attached to the bridge compartment portion 3, the side end of the first resistance wall 51 is connected with the second resistance wall 52, and the side end of the second resistance wall 52 is connected with the third resistance wall 53. The diameter of the parting surface 41 of the hub 4 is increased by at least 1 mm based on national standards. Firstly, the hub 4 is placed on the trimming female die 2, then the first, second and

third resistance walls

51, 52 and 53 of the flash 5 are tightly clamped and attached to the bridge bin part 3 to form the positioning of the hub 4, the driving device is started, the lower die unit is driven to move downwards to evenly cut 1 mm more parting line steps 43 of the hub 4, and then the cut hub 4 falls into the trimming female die 2.

As shown in fig. 5, 7 and 8, the left and right ends of the second resistance wall 52 at the left end of the flash 5 are connected with the first and

third resistance walls

51, 52 and 53, the first resistance wall 51 moves in the left and right directions of the bridge bin portion 3 before being positioned downwards until the bridge bin portion 3 is positioned, the second resistance wall 52 moves in the front and rear directions of the bridge bin portion 3 before being positioned downwards until the bridge bin portion 3 is positioned, so that the hub 4 is positioned at a specified position, and the corners of the hub 4 are prevented from being cut when the upper die unit 1 is cut. The third resistance wall 53 fixes the distance between the two second resistance walls 52, and the second resistance wall 52 also fixes the distance between the two first resistance walls 51, so that the positioning can not be realized by unfolding when the positioning is clamped. The first, second and

third resistance walls

51, 52 and 53 also have a supporting function, and are used for supporting the hub 4 and preventing the hub 4 from being stressed and deformed when the parting surface 41 is cut off, so that the problem of the parting line step 43 cannot be solved.

Specifically, as shown in fig. 4 and 5, the trimming die 2 is provided with a receiving space 21 at the center. The bridge compartment portion 3 surrounds the accommodation space 21. The bridge bin part 3 provides a supporting point to support the hub 4 to perform cutting work in the accommodating space 21, when the parting surface 41 of the hub 4 is cut, the accommodating space 21 can isolate the contact between a downward cylinder protruding from the hub 4 and the bottom of the trimming female die 2 when the hub 4 is processed in the prior art, so that the situation that the cylinder props against the bottom of the trimming female die 2 to enable the hub 4 to move up and down due to vibration or the height of the bottom of the trimming female die 2 is quickly increased due to accumulation of scraps generated by processing at the bottom of the trimming female die 2 is prevented, the first, second and

third resistance walls

51, 52 and 53 cannot be tightly clamped and attached to the bridge bin part 3, and difficulty is caused in cutting the parting surface 41 of the hub 4; the second receiving space 21 can temporarily store the hub 4 after the parting surface 41 of the hub 4 is cut off or directly provide a moving space for the hub 4 to be transferred to the next process, so that the cutting off of the parting surface 41 of the next hub 4 is not hindered.

Specifically, the top end of the bridge bin portion 3 facing the center of the trimming concave die 2 is provided with a supporting platform 32. The top ends of the first, second and

third resistance walls

51, 52 and 53 facing the center of the trimming concave die 2 are provided with a positioning platform 54. The support platform 32 supports a positioning platform 54. The support platform 32 has a planar surface. The positioning platform 54 can be kept on the same horizontal line when attached to the supporting platform 32, so that the hub 4 is prevented from inclining, the plane of the parting surface 41 of the hub 4 is cut off irregularly, the quality is affected, and the parting line step 43 cannot be eliminated under the condition of ensuring the quality.

Specifically, as shown in fig. 5, 9 and 10, the bottom portions of the first, second and

third resistance walls

51, 52 and 53 are provided with welts 55 extending in the opposite direction to the bridge compartment portion 3. The contact area of hem 55 increase side cut and die has strengthened bridge storehouse portion 3 holding power, prevents that bridge storehouse portion 3 from receiving wheel hub 4 high fever influence, and the atress is too big when wheel hub 4 amputates simultaneously leads to bridge storehouse portion 3 to warp, can not evenly amputate wheel hub 4 parting face 41.

Specifically, as shown in fig. 4 and 9, the opposite end surfaces of the bridge compartment portion 3 are inclined to each other. The bridge chamber portion 3 has four oblong grooves 31, the oblong grooves 31 are located at four average positions in the bridge chamber portion 3, and the bridge chamber portion 3 around the oblong grooves 31 is inclined toward the oblong grooves 31. Before the first, second and third resistance walls 51, 52, 53 of the flash 5 are tightly jointed with the bridge bin part 3, accurate mutual pre-alignment is not needed, the upper end part of the bridge bin part 3 inclines towards the direction of the trimming female die 2, so the space at the upper end of the bridge bin part 3 is narrowed, when the alignment positioning is started, the lower ends of the first, second and third resistance walls 51, 52, 53 correspond to the lower end of the bridge bin part 3, the front, rear, left and right movable spaces of the first, second and third resistance walls 51, 52, 53 are enlarged, the assembly difficulty is greatly reduced, the first, second and third resistance walls 51, 52, 53 of the flash 5 can be guided along the inclined edge generated by the inclination of the bridge bin part 3 in the alignment positioning process, so that the first, second and third resistance walls 51, 52, 53 of the flash 5 are tightly jointed with the bridge bin part 3, the assembly time is saved, the labor force is saved for assembly workers, the assembly quality is continued, and the quality of the uniform cutting of the split die, the parting line step 43 cannot be eliminated with quality assurance.

Specifically, the hub 4 is in a hot state, the temperature is 900-1000 ℃, and the driving force of the driving device is more than 80 tons. The situation that the process does not reach the standard and the parting surface 41 of the hub 4 cannot be cut off is prevented.

More specifically, as shown in fig. 4 and 9, the inner edge of the support platform 32 has a circular arc surface with a concave arc surface facing the bridge compartment portion 3. The inner edge of the positioning platform 54 has a circular arc surface with a concave arc surface facing the bridge compartment portion 3. The radian of the arc surfaces of the supporting platform 32 and the positioning platform 54 is larger than the rotating radian of the hub 4, and the movement caused by unexpected vibration and other reasons during cutting can be blocked by the arc surfaces, so that the positioning effect is achieved.

Example two:

a method of positioning, comprising the steps of:

pre-aligning, namely pre-aligning the center of the hub 4 in a thermal state (the temperature is 900-1000 ℃) to the center surrounded by the bridge bin part 3;

placing the wheel hub 4, and moving the wheel hub 4 downwards to be placed on the trimming female die 2;

positioning the hub 4, namely clamping and attaching the first, second and

third resistance walls

51, 52 and 53 on the flash 5 of the hub 4 to the bridge bin part 3 of the trimming female die 2 to position the hub 4;

cutting off the hub 4, starting a driving device to drive the upper die unit 1 to move downwards, and cutting off the 1 mm part of the parting surface 41 of the hub 4 on the standard basis by utilizing the impulse force of more than 80 tons, so that the step of the parting surface 41 of the hub 4 is cut off, and the step 43 of the parting line is completely eliminated;

the hub 4 is processed, and the cut hub 4 falls into the trimming female die 2.

Although the illustrative embodiments of the present invention have been described above to enable those skilled in the art to understand the present invention, the present invention is not limited to the scope of the embodiments, and it is apparent to those skilled in the art that all the inventive concepts using the present invention are protected as long as they can be changed within the spirit and scope of the present invention as defined and defined by the appended claims.

Claims

1. A forging cutting apparatus, comprising:

a drive device;

the upper die unit is connected with the driving device;

the trimming female die is aligned with the upper die unit, the driving device can move relative to the trimming female die, and the trimming female die is provided with a bridge bin part;

the overlap, the wheel hub die parting face is connected to the overlap, the overlap includes:

the first resistance wall is attached to the bridge bin part;

the second resistance wall is connected with the side end of the first resistance wall and is attached to the bridge cabin part;

and the third resistance wall is connected with the side end of the second resistance wall.

2. The forging cutting device of claim 1, wherein the trimming die has a receiving space in the center.

3. The forging severing device of claim 1, wherein the bridge pocket portion comprises:

and the supporting platform is connected with the top end of the bridge bin part facing the center of the trimming female die.

4. The forging severing device of claim 1, wherein the first, second, and third resistance walls comprise:

and the positioning platform is connected with the top ends of the first resistance wall, the second resistance wall and the third resistance wall facing the center of the trimming female die.

5. The forging severing device of claim 1, wherein the first, second, and third resistance walls comprise:

and the welts are connected with the bottoms of the first resistance wall, the second resistance wall and the third resistance wall, which extend towards the opposite direction of the bridge cabin part.

6. The forging severing device of claim 1, wherein the opposing end faces of the bridge pocket portions are inclined to one another.

7. The forging cutting device of claim 1, wherein the bridge pocket portion has four oblong grooves, the oblong grooves are located at an average of four positions in the bridge pocket portion, and the bridge pocket portion at the periphery of the oblong grooves is inclined toward the oblong grooves.

8. The forging cutoff device of claim 1, wherein the hub is hot and has a temperature of 900-1000 ℃.

9. The forging cutting device according to claim 1, wherein the driving force of the driving device is 80 tons or more.

10. The forging severing device of claim 2, wherein the bridge pocket portion surrounds the receiving space.