Flattening and bending integrated die for forging of transmission shaft flange yoke

Abstract

The utility model discloses a transmission shaft flange fork forging is with the flat -bending integrated mould that presses, including the upper movable pressure seat and the lower fixed support of upper and lower corresponding arrangement, the front side of upper movable pressure seat bottom surface and the top surface of lower fixed support sets up the bending station, and the rear side of upper movable pressure seat bottom surface and the top surface of lower fixed support sets up the flat -bending station. The utility model has the advantages of simple structure, size reduction, enhanced versatility, and the flat -bending work step replaces the conventional upsetting, pre -forging work step, which significantly reduces the die cost of flange fork forging process and the operation requirement of workers.

Description

Technical Field

[0001] This utility model belongs to the field of automotive industry technology, specifically relating to an integrated flattening and bending mold for forging drive shaft flange forks. Background Technology

[0002] In recent years, new energy vehicles have become a major trend in the automotive industry, especially against the backdrop of increasingly stringent environmental regulations, with new power sources such as pure electric vehicles, plug-in hybrid vehicles, and hydrogen fuel cell vehicles gradually emerging. With rapid changes in vehicle models, driveshaft types are also constantly evolving. Market competition is fierce; stagnation means decline. Reducing the mold costs of driveshaft components is imperative; therefore, researching new forging processes for driveshaft flange forks is of great significance to the development of enterprises.

[0003] The flange fork is a crucial component of the automotive driveshaft. It is manufactured through forging followed by machining. The forging process includes upsetting, pre-forging, and final forging. Upsetting reduces the billet height while increasing its cross-section; pre-forging deforms the billet to near the shape and size of the forging, ensuring the metal easily fills the final forging cavity during final forging. This also reduces wear on the final forging cavity and extends the service life of the final forging die. However, this forging process has the following problems: 1) The traditional upsetting process reduces the length of the billet and increases the cross-section, and can remove oxide scale. However, the upper movable pressure block and lower fixed support used in the upsetting process increase the installation space and increase the requirements on the worktable of the forging equipment (press).

[0004] 2) The shape and size of the pre-forged part obtained through the pre-forging step are close to those of the final forging. The pre-forging cavity is located in the center of the pre-forging die. The upset billet is placed into the pre-forging cavity. The pre-forging die (including the movable upper pre-forging die and the fixed lower pre-forging die) has locking latches at all four corners to prevent the forging from being misaligned during the pre-forging process. Jaws need to be machined on the front and back sides of the pre-forging die to facilitate the demolding of the forging. The combination of these working parts results in an increased size of the pre-forging die, increasing the manufacturing cost of the pre-forging die and the required working space for the equipment.

[0005] 3) The pre-forging cavity of traditional pre-forging dies can generally only be used for forging production of flange fork products of one size and model, and it is difficult to use it for forging flange fork products of other sizes and models. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a flattening and bending integrated die for forging transmission shaft flange forks that is simple in structure, small in size, replaces upsetting and pre-forging dies, and has strong versatility.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a flattening and bending integrated mold for forging a transmission shaft flange fork, including an upper movable pressure seat and a lower fixed support arranged correspondingly on the upper and lower sides, a bending station is provided on the front side of the bottom surface of the upper movable pressure seat and the top surface of the lower fixed support, and a flattening station is provided on the rear side of the bottom surface of the upper movable pressure seat and the top surface of the lower fixed support.

[0008] The upper movable pressure seat has countersunk holes on the upper part of both sides of the left side. The countersunk holes are fixedly connected to the bottom surface of the movable pressure block of the press by countersunk bolts. The lower fixed support has countersunk holes on the lower part of both sides of the left side. The countersunk holes are fixedly connected to the worktable surface of the press by countersunk bolts.

[0009] The bending station includes an upper pressure head and a lower groove corresponding to each other. The upper pressure head is fixed in the middle of the bottom surface of the upper movable pressure seat. The upper pressure head and the upper movable pressure seat are made of steel blocks as one piece. The lower groove is opened in the middle of the top surface of the lower fixed support. The length of the upper pressure head in the left and right direction is less than the length of the lower groove in the left and right direction. The bottom of the upper pressure head and the bottom of the groove in the lower groove are both arc surfaces in the left and right directions.

[0010] The top surface of the lower fixed support is provided with a positioning protrusion strip located on the right side of the lower groove, and the length of the positioning protrusion strip is along the front-to-back direction.

[0011] The flattening station includes an upper horizontal pressing surface located on the bottom surface of the upper movable pressing seat and a lower horizontal pressing surface located on the top surface of the lower fixed support, with the upper and lower horizontal pressing surfaces corresponding to each other.

[0012] The upper horizontal pressing surface of the flattening station is lower than the bottom surface of the upper movable pressing seat of the bending station.

[0013] In order to reduce the mold cost, reduce the volume, and improve the versatility of the mold for the flange forging, the above technical solution is adopted. The existing upsetting and pre-forging steps are replaced with flattening and bending steps. The working process of this utility model is as follows: First, the cylindrical blank is placed on the lower horizontal pressure surface of the top surface of the lower fixed support of the flattening station. The press is started, and the movable pressure block of the press drives the upper movable pressure seat to move downward. The upper horizontal pressure surface of the bottom surface of the movable pressure seat applies downward pressure to the cylindrical blank. After the movable pressure block of the press moves down to the set position, it stops and is lifted up. The flattened blank on the flattening station is placed in the bending station. The right end of the flattened blank contacts the positioning convex strip. The press is started again, and the movable pressure block of the press drives the upper movable pressure seat to move downward. The bottom surface of the upper pressure head applies pressure to the middle of the top surface of the flattened blank. The middle of the flattened blank is pressed into the lower groove until the movable pressure block of the press moves down to the set position, stops and is lifted up. The flattened and bent blank is removed, completing the flattening and bending step of a blank.

[0014] This utility model has the following technical effects: 1) The flattening and bending steps share a single mold. The cylindrical blank is first flattened at the flattening station. After flattening, the flattened blank is clamped and placed at the bending station for bending. The positioning ridges are used to position the flattened blank in the left and right directions, ensuring that the upper pressure head applies pressure to the center of the flattened blank. The bending and flattening stations are arranged front and back, with the upper movable pressure seat and lower fixed support evenly distributed in front and back dimensions. The bending and flattening stations share a single mold, eliminating the cost of a separate pre-forging mold and directly reducing mold costs by 30%.

[0015] 2) The final forging process is carried out directly after the flattening and bending steps, which reduces one set of pre-forging mold. Moreover, the flattening and bending integrated mold of this utility model is about the same size as the original upsetting mold. This reduces the mold installation space used in the flange forging process and lowers the requirements for the worktable of the forging equipment.

[0016] 3) Using this utility model to perform the flattening and bending steps reduces the difficulty of operation for workers and improves the pass rate of forgings.

[0017] 4) The flattening and bending integrated mold has a simple structure, is easy to process and manufacture, and is highly versatile, applicable to flange forks of different models and sizes, which can effectively reduce mold costs.

[0018] 5) The upper horizontal pressing surface of the flattening station is lower than the bottom surface of the upper movable pressing seat of the bending station. This allows the upper movable base to be set to the same extreme position when bending and flattening, thus ensuring the ease of operation and reliability of the flattening and bending steps.

[0019] In summary, this utility model has a simple structure, reduced size, and enhanced versatility. It replaces the conventional upsetting and pre-forging steps with flattening and bending steps, which significantly reduces the mold cost and operator requirements of the flange fork forging process. Attached Figure Description

[0020] Figure 1 A schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 Top view of the lower fixed support; Figure 3 This is a schematic diagram of the blank after the flattening process using this utility model; Figure 4 This is a schematic diagram of the forging after the bending process using this utility model. Detailed Implementation

[0021] like Figures 1-2As shown, the flattening and bending integrated mold for forging the transmission shaft flange fork of this utility model includes an upper movable pressure seat 1 and a lower fixed support 2 arranged correspondingly on the top and bottom sides. A bending station is provided on the front side of the bottom surface of the upper movable pressure seat 1 and the top surface of the lower fixed support 2, and a flattening station is provided on the rear side of the bottom surface of the upper movable pressure seat 1 and the top surface of the lower fixed support 2.

[0022] The upper movable pressure seat 1 has upper countersunk holes 3 on the upper part of both sides of the left side. The upper countersunk holes 3 are fixedly connected to the bottom surface of the movable pressure block of the press by upper countersunk bolts. The lower fixed support 2 has lower countersunk holes 4 on the lower part of both sides of the left side. The lower countersunk holes 4 are fixedly connected to the worktable surface of the press by lower countersunk bolts.

[0023] The bending station includes an upper pressure head 5 and a lower groove 6 corresponding to each other. The upper pressure head 5 is fixedly installed in the middle of the bottom surface of the upper movable pressure seat 1. The upper pressure head 5 and the upper movable pressure seat 1 are made of steel blocks as one piece. The lower groove 6 is opened in the middle of the top surface of the lower fixed support 2. The length of the upper pressure head 5 in the left and right direction is less than the length of the lower groove 6 in the left and right direction. The bottom of the upper pressure head 5 and the bottom of the groove of the lower groove 6 are both arc surfaces in the left and right directions.

[0024] The top surface of the lower fixed support 2 is provided with a positioning protrusion 7 located on the right side of the lower groove 6, and the length of the positioning protrusion 7 is along the front-back direction.

[0025] The flattening station includes an upper horizontal pressing surface 8 located on the bottom surface of the upper movable pressing seat 1 and a lower horizontal pressing surface 9 located on the top surface of the lower fixed support 2. The upper horizontal pressing surface 8 and the lower horizontal pressing surface 9 are vertically aligned.

[0026] The upper horizontal pressing surface 8 of the flattening station is lower than the bottom surface of the upper movable pressing seat 1 of the bending station.

[0027] To reduce the mold cost, decrease the size, and improve the versatility of flange forgings, the existing upsetting and pre-forging steps are replaced with flattening and bending steps. The working process of this invention is as follows: First, the cylindrical blank is placed on the lower horizontal pressure surface 9 of the top surface of the lower fixed support 2 at the flattening station. The press is started, and the movable pressure block of the press drives the upper movable pressure seat 1 to move downwards. The upper horizontal pressure surface 8 of the bottom surface of the movable pressure seat applies downward pressure to the cylindrical blank. After the movable pressure block of the press moves down to the set position, it stops and lifts upwards, flattening the blank (e.g., the blank flattened at the flattening station)... Figure 3 (As shown) The blank is placed in the bending station. The right end of the flattened blank contacts the positioning convex strip 7. The press is restarted. The movable pressure block of the press drives the upper movable pressure seat 1 to move downward. The bottom of the upper pressure head 5 applies pressure to the middle of the top surface of the flattened blank. The middle of the flattened blank is pressed into the lower groove 6 until the movable pressure block of the press moves down to the set position and stops and then lifts up, flattening and bending the blank (such as...) Figure 4 (As shown) Remove it to complete the flattening and bending process of a blank.

[0028] This utility model has the following technical effects: 1) The flattening and bending steps share a single mold. The cylindrical blank is first flattened at the flattening station. After flattening, the flattened blank is clamped and placed at the bending station for bending. The positioning ridge 7 positions the flattened blank in the left and right directions, ensuring that the upper pressure head 5 applies pressure to the center of the flattened blank. The bending and flattening stations are arranged front and back, evenly distributing the front and back dimensions of the upper movable pressure seat 1 and the lower fixed support 2. The bending and flattening stations share a single mold, reducing the cost of a pre-forging mold by 30%.

[0029] 2) The final forging process is carried out directly after the flattening and bending steps, which reduces one set of pre-forging mold. Moreover, the flattening and bending integrated mold of this utility model is about the same size as the original upsetting mold. This reduces the mold installation space used in the flange forging process and lowers the requirements for the worktable of the forging equipment.

[0030] 3) Using this utility model to perform the flattening and bending steps reduces the difficulty of operation for workers and improves the pass rate of forgings.

[0031] 4) The flattening and bending integrated mold has a simple structure, is easy to process and manufacture, and is highly versatile, applicable to flange forks of different models and sizes, which can effectively reduce mold costs.

[0032] 5) The upper horizontal pressing surface 8 of the flattening station is lower than the bottom surface of the upper movable pressing seat 1 of the bending station. This allows the upper movable seat to be set to the same extreme position when bending and flattening, thus ensuring the ease of operation and reliability of the flattening and bending steps.

[0033] This embodiment does not impose any limitation on the shape, material, structure, etc. of this utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. A flattening and bending integrated die for forging a drive shaft flange fork, characterized in that: It includes an upper movable pressure seat and a lower fixed support that are set up correspondingly. A bending station is set on the front side of the bottom surface of the upper movable pressure seat and the top surface of the lower fixed support, and a flattening station is set on the rear side of the bottom surface of the upper movable pressure seat and the top surface of the lower fixed support.

2. The flattening and bending integrated die for forging the transmission shaft flange fork according to claim 1, characterized in that: The upper movable pressure seat has countersunk holes on the upper part of both sides of the left side. The countersunk holes are fixedly connected to the bottom surface of the movable pressure block of the press by countersunk bolts. The lower fixed support has countersunk holes on the lower part of both sides of the left side. The countersunk holes are fixedly connected to the worktable surface of the press by countersunk bolts.

3. The flattening and bending integrated die for forging the transmission shaft flange fork according to claim 1 or 2, characterized in that: The bending station includes an upper pressure head and a lower groove corresponding to each other. The upper pressure head is fixed in the middle of the bottom surface of the upper movable pressure seat. The upper pressure head and the upper movable pressure seat are made of steel blocks as one piece. The lower groove is opened in the middle of the top surface of the lower fixed support. The length of the upper pressure head in the left and right direction is less than the length of the lower groove in the left and right direction. The bottom of the upper pressure head and the bottom of the groove in the lower groove are both arc surfaces in the left and right directions.

4. The flattening and bending integrated die for forging the transmission shaft flange fork according to claim 3, characterized in that: The top surface of the lower fixed support is provided with a positioning protrusion strip located on the right side of the lower groove, and the length of the positioning protrusion strip is along the front-to-back direction.

5. The flattening and bending integrated die for forging the transmission shaft flange fork according to claim 3, characterized in that: The flattening station includes an upper horizontal pressing surface located on the bottom surface of the upper movable pressing seat and a lower horizontal pressing surface located on the top surface of the lower fixed support, with the upper and lower horizontal pressing surfaces corresponding to each other.

6. The flattening and bending integrated die for forging the drive shaft flange fork according to claim 5, characterized in that: The upper horizontal pressing surface of the flattening station is lower than the bottom surface of the upper movable pressing seat of the bending station.

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