CN215786144U - Thin-wall gear hub rolling forming die - Google Patents

Abstract

The utility model discloses a rolling forming die for a thin-wall gear hub, which comprises a spline type stamping die, wherein the spline type stamping die is connected with an upper die fixing seat through a module connecting block, and the upper die fixing seat is controlled by a first driver to move up and down; a lower die fixing seat is arranged below the upper die fixing seat, and a roller type ring die is fixedly arranged in a lower die mounting groove of the lower die fixing seat; a concave die sleeve is arranged at the inner lower part of the roller type ring die, the lower end of the concave die sleeve is fixed between the roller type ring die and the bottom of the lower die mounting groove, and a circle of convex teeth are arranged at the upper end of the concave die sleeve; the concave die sleeve is sleeved outside the workpiece positioning die core, the workpiece positioning die core is driven by a third driver to penetrate through the roller type ring die in an up-and-down motion mode, and the workpiece positioning die core is provided with a protrusion used for being matched with the concave bottom surface on the spline type stamping die and a positioning column used for being in splicing fit with the two holes on the concave bottom wall. The spline type axial side wall of the gear hub is machined in a mode that the roller type ring die is matched with the spline type stamping die, and machining quality is good.

Description

Thin-wall gear hub rolling forming die

Technical Field

The utility model relates to a thin-wall gear hub forming die, in particular to a thin-wall gear hub rolling forming die.

Background

The thin-wall steel plate inner and outer trapezoidal spline parts are commonly used for important parts of an automobile gearbox, and the requirements for the gear hub of the important parts of the gearbox are increased along with the development of the automobile industry. At present, the internal and external spline products of the internal and external tooth thin-wall parts of the gear hub are formed by mainly adopting cold punching die stretching forming and GROB rolling forming, and the method has the advantage of low manufacturing cost for the die and equipment.

Disclosure of Invention

1. Technical problem to be solved by the utility model

The utility model aims to provide a rolling forming die for a thin-wall gear hub, and the rolling forming die has the advantages of simple structure, ingenious design and quick assembly, and the spline type axial side wall of the gear hub is machined in a manner of matching a roller type ring die with a spline type stamping die, so that the machining quality is good.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the utility model is as follows:

the utility model discloses a rolling forming die for a thin-wall gear hub, which comprises a spline type stamping die, wherein the spline type stamping die is connected with an upper die fixing seat through a module connecting block, and the upper die fixing seat is controlled by a first driver to move up and down; a lower die fixing seat which is fixed is arranged below the upper die fixing seat, and a roller type ring die which is matched with a spline type stamping die upper spline groove and used for forming a spline type axial side wall of a gear hub is fixedly arranged in a lower die mounting groove of the lower die fixing seat; a concave die sleeve is arranged at the inner lower part of the roller type ring die, the lower end of the concave die sleeve is fixed between the roller type ring die and the bottom of the lower die mounting groove, and a circle of convex teeth matched with the lower end of a spline groove on the spline type stamping die is arranged at the upper end of the concave die sleeve; the concave die sleeve is sleeved outside a workpiece positioning die core for quickly positioning a workpiece to be processed, the workpiece positioning die core is driven by a third driver to penetrate through the roller type ring die in an up-and-down motion mode, and the workpiece positioning die core is provided with a protrusion for matching with the concave bottom wall of the spline type stamping die, the concave bottom wall of the spline type stamping die is used for positioning the concave bottom wall of the gear hub, and a positioning column for being in splicing fit with two holes in the concave bottom wall.

Furthermore, the workpiece positioning mold core comprises a movable plate and a movable groove arranged on the lower surface of the lower mold fixing seat, the movable groove is communicated with the lower mold mounting groove through a fixed sleeve, and the lower end of the concave mold sleeve is limited between the fixed sleeve and the roller type ring mold; the movable plate is arranged in the movable groove in a vertically movable manner and is supported on a pillar fixedly arranged on the bottom plate; the bottom plate is fixed on the lower surface of the lower die fixing seat, and the driving end of the third driver penetrates through the bottom plate and then acts on the lower surface of the movable plate; the upper surface of the movable plate is fixedly connected with the lower end of the material pushing shaft, and the upper end of the material pushing shaft penetrates through the fixed sleeve to be in sliding fit with the female die sleeve; the upper surface of the material pushing shaft is provided with a mold core mounting groove and a protrusion which are coaxially arranged; a positioning component is arranged in the mold core mounting groove, and a nitrogen spring is arranged between the positioning component and the bottom of the mold core mounting groove; the positioning assembly comprises a supporting shaft, a nitrogen spring mounting groove is formed in the lower surface of the supporting shaft, and after the nitrogen spring is arranged in the nitrogen spring mounting groove, a piston rod of the nitrogen spring penetrates out of a flange plate fixedly arranged on the lower surface of the supporting shaft and then abuts against the bottom of the mold core mounting groove; the upper end of the supporting shaft is sleeved with a positioning column limiting sleeve, the lower end of the positioning column is limited between the positioning column limiting sleeve and a step surface in the mold core mounting groove, and the positioning column limiting sleeve is fixedly connected with the step surface in the mold core mounting groove; the upper end of the positioning column penetrates out of the supporting plate fixedly arranged on the upper surface of the supporting shaft and then can extend into the column hole on the lower surface of the spline type stamping die.

Furthermore, a first radial slide block is fixedly arranged between the roller type ring die and the bottom of the lower die mounting groove, and the free end of the first radial slide block penetrates through the fixed sleeve and then is in sliding fit with a first axial slide groove arranged on the circumferential surface of the material pushing shaft.

Furthermore, a second radial sliding block is fixedly arranged on the circumferential surface of the material pushing shaft and positioned at the top of the first axial sliding groove, and the free end of the second radial sliding block is in sliding fit with a second axial sliding groove arranged on the circumferential surface of the supporting shaft.

Furthermore, the roller type ring die comprises an upper clamping plate, a hoop sleeve and a lower clamping plate, wherein the upper clamping plate is provided with a through hole for a workpiece to be processed to pass through, and a plurality of upper radial grooves which are radially arranged are uniformly distributed on the lower surface of the upper clamping plate along the circumferential direction of the edge of the through hole; the lower clamping plate is provided with a mounting hole for mounting the female die sleeve conveniently, and a plurality of lower radial grooves which are radially arranged are uniformly distributed on the upper surface of the lower clamping plate along the circumferential direction of the edge of the mounting hole; a plurality of roller assemblies which are uniformly distributed along the circumferential direction and are radially arranged are arranged in the hoop sleeve, and the roller assemblies, the upper radial groove and the lower radial groove are arranged in a one-to-one correspondence manner; after the plurality of roller assemblies and the hoop sleeves are clamped between the upper clamping plate and the lower clamping plate, the lower clamping plate is fixedly connected with the lower end of the hoop sleeve, and the upper clamping plate is fixedly connected with the lower die fixing seat; the roller assembly comprises a roller, an adjusting plate, a connecting plate and two roller mounting plates which are respectively positioned at two sides of the roller, the roller is rotatably arranged in a roller mounting cavity formed between the two roller mounting plates, the two roller mounting plates are fixedly connected together, and the edge of the roller penetrates out of the roller mounting cavity to be matched with the spline type die to form the spline type axial side wall of the gear hub; the upper positioning convex plates of the two roller mounting plates can be clamped in the upper radial grooves in a radially adjustable manner, the lower positioning convex plates of the two roller mounting plates can be clamped in the lower radial grooves in a radially adjustable manner, and the connecting plate, the adjusting plate and the two roller mounting plates are connected together, wherein the connecting plate is limited between the inner circumferential surface of the hoop and the radial protrusion between the two lower radial grooves on the lower clamping plate, and the adjusting plate is limited between the connecting plate and the roller mounting plates.

Furthermore, the inner circle surface of the mounting hole is provided with a convex step which is matched with the concave step on the female die sleeve.

Furthermore, the upper end of the hoop sleeve is in concave-convex fit with the upper clamping plate, and the lower end of the hoop sleeve is in concave-convex fit with the lower clamping plate.

Furthermore, the device also comprises a stripping mechanism for pushing the finished product to be separated from the spline type stamping die, wherein the stripping mechanism comprises a three-fork-shaped plate, and the three-fork-shaped plate can be arranged in a three-fork-shaped groove on the upper surface of the upper die fixing seat in a vertically movable manner; the upper surface of the three-fork template is fixedly connected with the lower end of the connecting rod, and the upper end of the connecting rod can penetrate through a top plate fixedly arranged on the upper surface of the upper die fixing seat in a vertically movable manner and then is connected with a second driver; three upper push rods are uniformly and fixedly arranged on the three-fork-shaped plate along the circumferential direction, the lower end of each upper push rod penetrates out of the groove bottom of the three-fork-shaped groove and the flange part of the module connecting block and then abuts against the upper material pushing plate, and the flange part at the upper end of the module connecting block is fixed on the lower surface of the upper die fixing seat; the shaft part at the lower end of the module connecting block penetrates through the upper material pushing plate and then is fixedly connected with the spline type stamping die, and a material pushing sleeve used for pushing a finished product to be separated from the spline type stamping die is sleeved outside the spline type stamping die; and a flange part at the upper end of the material pushing sleeve is fixedly connected with the upper material pushing plate, and a spline at the lower end of the material pushing sleeve is in sliding fit with a spline groove on the spline type stamping die.

Furthermore, the cross-shaped protrusion on the upper surface of the spline type die is matched with the cross-shaped groove on the lower surface of the module connecting block in a clamping way.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

(1) the rolling forming die for the thin-wall gear hub is simple in structure, ingenious in design and fast in assembly, the spline type axial side wall of the gear hub is machined in a mode that the roller type ring die is matched with the spline type stamping die, and machining quality is good;

(2) the utility model relates to a thin-wall gear hub rolling forming die which is characterized in that a positioning column is used for clamping a workpiece, so that a spline type stamping die is inserted into the workpiece, a protrusion is matched with the upper concave bottom surface of the spline type stamping die to position the workpiece, so that the spline type stamping die is matched with a roller type ring die to process a spline type axial side wall, and finally a convex tooth on a concave die sleeve is matched with a spline groove on the spline type stamping die to limit the lowest running part of the workpiece, so that the workpiece cannot be pressed downwards continuously;

(3) the thin-wall gear hub rolling forming die has the advantages that the workpiece positioning die core is simple in structure and convenient to connect, two-stage lifting can be completed, the first stage is controlled by the third driver, the upper end of the pushing shaft moves to the upper part from the lower part in the roller type ring die, and the second stage is controlled by the nitrogen spring, so that the positioning assembly is inserted into the through hole to be clamped by a workpiece;

(4) the roller type ring die of the thin-wall gear hub rolling forming die is simple in structure and rapid to assemble, the radial position of the roller can be adjusted according to needs, and the use is more flexible.

Drawings

Fig. 1 is a sectional view of a thin-walled gear hub roll forming mold according to the present invention;

FIG. 2 is a cross-sectional view of a lower mold fixing seat in the thin-wall gear hub rolling forming mold according to the present invention;

FIG. 3 is a cross-sectional view of a roller ring mold in the thin-walled gear hub rolling forming mold according to the present invention;

FIG. 4 is a three-dimensional view of a prior art gear hub;

FIG. 5 is a three-dimensional view of a spline type die in a thin-walled gear hub roll forming die of the present invention;

FIG. 6 is a three-dimensional view of a material pushing shaft in the thin-walled gear hub rolling forming mold according to the present invention;

FIG. 7 is a three-dimensional view of a female die sleeve in a thin-walled gear hub roll forming die of the present invention;

FIG. 8 is an exploded view of a roller ring mold in the thin-walled tooth hub rolling mold according to the present invention;

FIG. 9 is an exploded view of a second view of a roller ring mold in the thin-walled tooth hub rolling mold according to the present invention;

fig. 10 is an exploded view of the roller assembly in the thin-walled gear hub rolling forming die according to the present invention.

The reference numerals in the schematic drawings illustrate: 1. a spline type die; 1-1, column hole; 1-2, spline grooves; 1-3, an inner concave bottom surface; 2. a female die sleeve; 2-1, convex teeth; 3. a module connecting block; 4. an upper die fixing seat; 4-1, a three-fork groove; 5. a lower die fixing seat; 5-1, a movable groove; 6. a three-fork template; 7. a connecting rod; 8. a top plate; 9. a push rod is arranged; 10. a material pushing plate is arranged; 11. a material pushing sleeve; 12. a movable plate; 13. fixing a sleeve; 14. a base plate; 15. a material pushing shaft; 15-1, a first axial runner; 15-2, convex; 15-3, mold core mounting grooves; 16. a nitrogen spring; 17. a first radial slider; 18. a support shaft; 18-1, a second axial chute; 19. a flange plate; 20. a positioning column limiting sleeve; 21. a positioning column; 22. a support plate; 23. a second radial slider; 24. an upper splint; 24-1, perforating; 24-2, an upper radial groove; 25. a hoop sleeve; 26. a lower splint; 26-1, mounting holes; 26-2, a lower radial groove; 26-3, radial protrusions; 26-4, a convex step; 27. a roller; 28. an adjusting plate; 29. a connecting plate; 30. mounting a roller; 30-1, arranging a convex plate; 30-2, lower positioning convex plate; 31. a pillar; A. a gear hub; a-1, spline type axial side wall; a-2, an inner concave bottom wall; a-3 and holes.

Detailed Description

For a further understanding of the utility model, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Examples

With reference to fig. 1, 5 and 4, the thin-wall gear hub rolling forming die of the present embodiment includes a spline type punch die 1 and a stripping mechanism for pushing a finished product to be separated from the spline type punch die, where the spline type punch die 1 has a plurality of spline grooves 1-2 and an inner concave bottom surface 1-3 uniformly distributed along a circumferential direction; the spline type stamping die 1 is connected with the upper die fixing seat 4 through the module connecting block 3, a cross-shaped bulge on the upper surface of the spline type stamping die 1 is in clamping fit with a cross-shaped groove on the lower surface of the module connecting block 3, and a flange part of the module connecting block 3 is in concave-convex fit connection with the lower surface of the upper die fixing seat 4, so that the spline type stamping die 1 and the module connecting block 3 as well as the module connecting block 3 and the upper die fixing seat 4 are quickly positioned and assembled; the upper die fixing seat 4 is controlled by a first driver to move up and down;

continuing to fig. 1, the stripping mechanism comprises a three-fork-shaped plate 6, and the three-fork-shaped plate 6 is arranged in a three-fork-shaped groove 4-1 on the upper surface of the upper die fixing seat 4 in a vertically movable manner; the upper surface of the three-fork template 6 is fixedly connected with the lower end of a connecting rod 7, and the upper end of the connecting rod 7 can penetrate through a top plate 8 fixedly arranged on the upper surface of the upper die fixing seat 4 in a vertically movable manner and then is connected with a second driver; three upper push rods 9 are uniformly and fixedly arranged on the three-fork-shaped plate 6 along the circumferential direction, the lower end of each upper push rod 9 penetrates out of the groove bottom of the three-fork-shaped groove 4-1 and the flange part of the module connecting block 3 and then abuts against the upper material pushing plate 10, and the flange part at the upper end of the module connecting block 3 is fixed on the lower surface of the upper die fixing seat 4; the shaft part at the lower end of the module connecting block 3 is fixedly connected with the spline type stamping die 1 after penetrating through the upper material pushing plate 10, and the outer sleeve of the spline type stamping die 1 is provided with a material pushing sleeve 11 for pushing a finished product to be separated from the spline type stamping die; a flange part at the upper end of the material pushing sleeve 11 is fixedly connected with the upper material pushing plate 10, and a spline at the lower end of the material pushing sleeve 11 is in sliding fit with a spline groove 1-2 on the spline type stamping die 1;

continuing and combining with the drawings of fig. 2, 6 and 7, a fixed lower die fixing seat 5 is arranged below the upper die fixing seat 4, and the upper die fixing seat 4 is connected with the upper die fixing seat 4 through a guide pillar and guide sleeve assembly; a roller type ring die which is used for forming a spline type axial side wall A-1 of a gear hub A is fixedly arranged in a lower die mounting groove of the lower die fixing seat 5, and is matched with a spline groove 1-2 on the spline type stamping die 1; a concave die sleeve 2 is arranged at the lower part in the roller type ring die, the lower end of the concave die sleeve 2 is fixed between the roller type ring die and the bottom of the lower die mounting groove, a circle of convex teeth 2-1 used for being matched with the lower ends of the spline grooves on the spline type punch die 1 are arranged at the upper end of the concave die sleeve 2, and the spline teeth between two adjacent spline grooves are matched with the tooth grooves between two adjacent convex teeth 2-1 in a clamping manner; the concave die sleeve 2 is sleeved outside a workpiece positioning die core for quickly positioning a workpiece to be processed, the workpiece positioning die core is driven by a third driver to penetrate through the roller type ring die in an up-and-down motion manner, and the workpiece positioning die core is provided with a bulge 15-2 for matching with the concave bottom surface of the spline type stamping die 1 to use for positioning the concave bottom wall A-2 of the gear hub A and a positioning column 21 for being in plug-in fit with two holes A-3 on the concave bottom wall A-2;

the workpiece positioning mold core comprises a movable plate 12 and a movable groove 5-1 arranged on the lower surface of the lower mold fixing seat 5, the movable groove 5-1 is communicated with the lower mold mounting groove through a fixed sleeve 13, and the lower end of the concave mold sleeve 2 is limited between the fixed sleeve 13 and the roller type ring mold; the movable plate 12 is movably arranged in the movable groove 5-1 up and down, and the movable plate 12 is supported on a pillar 31 fixedly arranged on the bottom plate 14; the bottom plate 14 is fixed on the lower surface of the lower die fixing seat 5, and the driving end of the third driver passes through the bottom plate 14 and then acts on the lower surface of the movable plate 12; the upper surface of the movable plate 12 is fixedly connected with the lower end of the material pushing shaft 15, the upper end of the material pushing shaft 15 penetrates through the fixed sleeve 13 to be in sliding fit with the concave die sleeve 2, a first radial slide block 17 is fixedly arranged between the bottom of the groove of the roller type ring die and the lower die mounting groove, and the free end of the first radial slide block 17 penetrates through the fixed sleeve 13 to be in sliding fit with a first axial slide groove 15-1 arranged on the circumferential surface of the material pushing shaft 15, so that the material pushing shaft 15 can slide up and down more stably; the upper surface of the material pushing shaft 15 is provided with a mold core mounting groove 15-3 and a protrusion 15-2 which are coaxially arranged; a positioning component is arranged in the die core mounting groove, and a nitrogen spring 16 is arranged between the positioning component and the bottom of the die core mounting groove; the positioning assembly comprises a supporting shaft 18, a nitrogen spring mounting groove is formed in the lower surface of the supporting shaft 18, after the nitrogen spring 16 is arranged in the nitrogen spring mounting groove, a piston rod of the nitrogen spring 16 penetrates out of a flange 19 fixedly arranged on the lower surface of the supporting shaft 18 and then abuts against the bottom of the mold core mounting groove, a second radial sliding block 23 is fixedly arranged on the circumferential surface of the material pushing shaft 15 and positioned at the top of the first axial sliding groove 15-1, and the free end of the second radial sliding block 23 is in sliding fit with a second axial sliding groove 18-1 arranged on the circumferential surface of the supporting shaft 18, so that the supporting shaft 18 can slide up and down more stably; the upper end of the supporting shaft 18 is sleeved with a positioning column limiting sleeve 20, the lower end of the positioning column 21 is limited between the positioning column limiting sleeve 20 and the step surface in the mold core mounting groove, and the positioning column limiting sleeve 20 is fixedly connected with the step surface in the mold core mounting groove; the upper end of the positioning column 21 penetrates out of a supporting plate 22 fixedly arranged on the upper surface of the supporting shaft 18 and then can extend into a column hole 1-1 on the lower surface of the spline type stamping die 1; the workpiece positioning mold core is simple in structure and convenient to connect, two-stage lifting can be completed, the first stage is controlled by the third driver, the upper end of the material pushing shaft moves to the upper part from the lower part in the roller type ring mold, and the second stage is controlled by the nitrogen spring, so that the positioning assembly is inserted into the through hole to be clamped by the workpiece;

continuing to and in conjunction with fig. 3, 8, 9 and 10, the roller ring die comprises an upper clamping plate 24, a hoop 25 and a lower clamping plate 26, wherein the upper clamping plate 24 is provided with a through hole 24-1 for a workpiece to be processed to pass through, and a plurality of upper radial grooves 24-2 which are radially arranged are uniformly distributed on the lower surface of the upper clamping plate 24 and along the edge of the through hole 24-1 in the circumferential direction; the lower clamping plate 26 is provided with a mounting hole 26-1 for mounting the female die sleeve, a plurality of lower radial grooves 26-2 which are radially arranged are uniformly distributed on the upper surface of the lower clamping plate 26 along the edge of the mounting hole 26-1 in the circumferential direction, and a boss step 26-4 which is matched with the recess step on the female die sleeve 2 is arranged on the inner circular surface of the mounting hole 26-1; a plurality of roller assemblies which are uniformly distributed along the circumferential direction and are arranged in the radial direction are arranged in the hoop sleeve 25, and the roller assemblies, the upper radial groove 24-2 and the lower radial groove 26-2 are arranged in a one-to-one correspondence manner; after the plurality of roller assemblies and the hoop sleeve 25 are clamped between the upper clamping plate 24 and the lower clamping plate 26, the lower clamping plate 26 is fixedly connected with the lower end of the hoop sleeve 25, the upper clamping plate 24 is fixedly connected with the lower die fixing seat 5, and the upper end of the hoop sleeve 25 is in concave-convex fit with the upper clamping plate 24 and the lower end of the hoop sleeve 25 is in concave-convex fit with the lower clamping plate 26, so that the hoop sleeve, the upper clamping plate and the lower clamping plate can be assembled quickly; the roller assembly comprises a roller 27, an adjusting plate 28, a connecting plate 29 and two roller mounting plates 30 which are respectively positioned at two sides of the roller 27, the roller 27 is rotatably arranged in a roller mounting cavity formed between the two roller mounting plates 30, the two roller mounting plates 30 are fixedly connected together, wherein the edge of the roller 27 penetrates out of the roller mounting cavity to be matched with the spline type axial side wall of the forming gear hub with the spline type stamping die 1; the upper positioning convex plates 30-1 of the two roller mounting plates 30 can be clamped in the upper radial grooves 24-2 in a radially adjustable manner, the lower positioning convex plates 30-2 of the two roller mounting plates 30 can be clamped in the lower radial grooves 26-2 in a radially adjustable manner, and the connecting plate 29, the adjusting plate 28 and the two roller mounting plates 30 are connected together, wherein the connecting plate 29 is limited between the inner circumferential surface of the hoop 25 and the radial protrusion 26-3, which is positioned between the two lower radial grooves 26-2, on the lower clamping plate 26, and the adjusting plate 28 is limited between the connecting plate 29 and the roller mounting plates 30; the roller type ring die is simple in structure and quick to assemble, the radial position of the roller can be adjusted according to needs, and the use is more flexible; since the adjusting plate 28 is provided to enable the roller assembly to slide along the radial groove for position adjustment, when the adjustment is needed, the adjusting plate 28 is removed, the roller assembly is moved along the radial groove, and finally the connecting plate 29 and the two roller mounting plates 30 are connected together.

The working process of the rolling forming die comprises the following steps:

1) when the mold is opened, the third driver works to push the movable plate 12 upwards, the movable plate 12 drives the pushing shaft 15 and the positioning assembly to move upwards together, the movable plate 12 does not move upwards after the pushing shaft 15 rises to a certain position, the nitrogen spring works to drive the positioning assembly to move upwards until a supporting plate 22 in the positioning assembly is flush with the upper surface of the lower mold fixing seat 5, the workpiece to be machined is placed on the supporting plate 22 and is quickly positioned and fixed in a mode that the positioning column 21 is in inserted fit with the hole in the concave bottom wall A-2, clamping of the workpiece to be machined is completed, and clamping of the workpiece is completed by the positioning column so that the spline type punching die is inserted into the workpiece; in addition, the second driver is controlled to work, so that the three-fork-shaped plate 6 moves to the top, namely the upper push rod 9 is driven to move to the top;

2) the die assembly is started, the first driver works to drive the upper die fixing seat 4 to move downwards, so that the material pushing sleeve 11 is pushed upwards by a workpiece to be processed, the spline type stamping die 1 is inserted into the workpiece to be processed, and the first driver is continuously controlled to work until the concave bottom wall A-2 of the gear hub A is clamped between the concave bottom surface of the spline type stamping die 1 and the supporting plate 22;

3) continuously closing the die, continuously controlling the first driver to work and controlling the nitrogen spring to work, pushing the workpiece to be processed to move downwards by the spline type stamping die 1, continuously controlling the first driver to work and controlling the nitrogen spring to work until the supporting plate 22 abuts against the positioning column limiting sleeve 20, clamping the inner concave bottom wall A-2 between the inner concave bottom surface of the spline type stamping die 1 and the protrusion on the material pushing shaft 15, positioning the workpiece by matching the protrusion with the inner concave bottom surface on the spline type stamping die so that the spline type stamping die and the roller type ring die are matched to process the spline type axial side wall, stopping the nitrogen spring to work, continuously controlling the first driver and the third driver to work, and matching the spline groove on the spline type stamping die 1 with the roller on the roller type ring die to start processing the spline type axial side wall A-1;

4) continuing to match the die until the die is finished, continuing to control the first driver and the third driver to work until the lower end of the spline type axial side wall A-1 is clamped between the convex teeth 2-1 on the concave die sleeve 2 and the spline grooves on the spline type stamping die 1, utilizing the matching of the convex teeth on the concave die sleeve and the spline grooves on the spline type stamping die to limit the lowest running part of the workpiece, so that the workpiece can not be pressed downwards continuously, finishing the processing of the spline type axial side wall A-1 at the moment, and abutting the flange part of the material pushing sleeve 11 against the lower die fixing seat 5;

5) controlling a second driver to work to drive the three-fork-shaped plate 6 to move downwards, and driving the upper push rod 9 to move downwards by the three-fork-shaped plate 6, so that the upper push rod 9 abuts against the upper push plate 10, and the push sleeve 11 is ensured to be continuous when the spline die 1 moves upwards;

6) the mold opening is started, the first driver is controlled to work to drive the upper mold fixing seat 4 to move upwards, the upper mold fixing seat 4 moves upwards to drive the spline type stamping die 1 to move upwards, the spline at the lower end of the material pushing sleeve 11 is in sliding fit with the spline groove on the spline type stamping die 1, and the material pushing sleeve 11 is abutted by the upper material pushing plate 10, so that the lower end face of the material pushing sleeve 11 is abutted against a finished product, and the first driver is continuously controlled to work until the material pushing sleeve 11 pushes the finished product to be separated from the spline type stamping die;

7) continuing to open the die until the die is finished, and continuing to control the first driver until the pushing sleeve 11 is completely separated from the lower die fixing seat 5;

8) and controlling the third driver to work to enable the movable plate 12 to move upwards, driving the material pushing shaft 15 to move upwards by the movable plate 12, ejecting the finished product out of the roller type ring die by the material pushing shaft 15, continuously controlling the third driver to work until the material pushing shaft 15 cannot move upwards, then controlling the nitrogen spring 16 to work to enable the supporting plate 22 to eject the finished product, and continuously controlling the nitrogen spring 16 to work until the supporting plate 22 moves to be flush with the upper surface of the lower die fixing seat 5, thereby finishing the ejection of the finished product.

The rolling forming die for the thin-wall gear hub is simple in structure, ingenious in design and fast in whole die assembly, and the spline type axial side wall of the gear hub is machined in a mode that the roller type ring die and the spline type stamping die are matched, so that the machining quality is good.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the utility model, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the utility model.

Claims (9)

1. The utility model provides a thin wall tooth hub roll forming die which characterized in that: the stamping die comprises a spline type stamping die (1), wherein the spline type stamping die (1) is connected with an upper die fixing seat (4) through a module connecting block (3), and the upper die fixing seat (4) is controlled by a first driver to move up and down; a fixed lower die fixing seat (5) is arranged below the upper die fixing seat (4), and a roller type ring die matched with a spline groove on the spline type stamping die (1) and used for forming a spline type axial side wall (A-1) of the gear hub (A) is fixedly arranged in a lower die mounting groove of the lower die fixing seat (5); a concave die sleeve (2) is arranged at the inner lower part of the roller type ring die, the lower end of the concave die sleeve (2) is fixed between the roller type ring die and the bottom of the lower die mounting groove, and a circle of convex teeth (2-1) used for being matched with the lower end of a spline groove on the spline type punch die (1) is arranged at the upper end of the concave die sleeve (2); the concave die sleeve (2) is sleeved outside a workpiece positioning die core for quickly positioning a workpiece to be processed, the workpiece positioning die core is driven by a third driver to penetrate through the roller type ring die in an up-and-down motion mode, and the workpiece positioning die core is provided with a protrusion for matching with the concave bottom wall (A-2) of the spline type stamping die (1) for positioning the concave bottom wall (A-2) of the gear hub (A) and a positioning column (21) for being in plug-in fit with the two holes in the concave bottom wall (A-2).

2. The thin-walled gear hub rolling forming die as claimed in claim 1, wherein: the workpiece positioning mold core comprises a movable plate (12) and a movable groove (5-1) arranged on the lower surface of the lower mold fixing seat (5), the movable groove (5-1) is communicated with the lower mold mounting groove through a fixing sleeve (13), and the lower end of the concave mold sleeve (2) is limited between the fixing sleeve (13) and the roller type ring mold; the movable plate (12) is arranged in the movable groove (5-1) in a vertically movable manner, and the movable plate (12) is supported on a support column (31) fixedly arranged on the bottom plate (14); the bottom plate (14) is fixed on the lower surface of the lower die fixing seat (5), and the driving end of the third driver penetrates through the bottom plate (14) and then acts on the lower surface of the movable plate (12); the upper surface of the movable plate (12) is fixedly connected with the lower end of the material pushing shaft (15), and the upper end of the material pushing shaft (15) penetrates through the fixed sleeve (13) to be in sliding fit with the female die sleeve (2); the upper surface of the material pushing shaft (15) is provided with a mold core mounting groove and a protrusion which are coaxially arranged; a positioning component is arranged in the mold core mounting groove, and a nitrogen spring (16) is arranged between the positioning component and the bottom of the mold core mounting groove; the positioning assembly comprises a supporting shaft (18), a nitrogen spring mounting groove is formed in the lower surface of the supporting shaft (18), and after the nitrogen spring (16) is arranged in the nitrogen spring mounting groove, a piston rod of the nitrogen spring (16) penetrates out of a flange plate (19) fixedly arranged on the lower surface of the supporting shaft (18) and then abuts against the bottom of the mold core mounting groove; the upper end of the supporting shaft (18) is sleeved with a positioning column limiting sleeve (20), the lower end of the positioning column (21) is limited between the positioning column limiting sleeve (20) and a step surface in the mold core mounting groove, and the positioning column limiting sleeve (20) is fixedly connected with the step surface in the mold core mounting groove; the upper end of the positioning column (21) penetrates out of a supporting plate (22) fixedly arranged on the upper surface of the supporting shaft (18) and then can extend into a column hole on the lower surface of the spline type stamping die (1).

3. The thin-walled gear hub rolling forming die as claimed in claim 2, wherein: a first radial slide block (17) is fixedly arranged between the roller type ring die and the bottom of the lower die mounting groove, and the free end of the first radial slide block (17) passes through the fixed sleeve (13) and then is in sliding fit with a first axial slide groove (15-1) arranged on the circumferential surface of the material pushing shaft (15).

4. The thin-walled gear hub rolling forming die as claimed in claim 2, wherein: and a second radial sliding block (23) is fixedly arranged on the circumferential surface of the material pushing shaft (15) and positioned at the top of the first axial sliding groove (15-1), and the free end of the second radial sliding block (23) is in sliding fit with a second axial sliding groove (18-1) arranged on the circumferential surface of the supporting shaft (18).

5. The thin-walled gear hub rolling forming die as claimed in claim 1, wherein: the roller type ring die comprises an upper clamping plate (24), a hoop sleeve (25) and a lower clamping plate (26), wherein a through hole (24-1) for a workpiece to be processed to pass through is formed in the upper clamping plate (24), and a plurality of upper radial grooves (24-2) which are radially arranged are uniformly distributed on the lower surface of the upper clamping plate (24) along the edge of the through hole (24-1) in the circumferential direction; the lower clamping plate (26) is provided with a mounting hole (26-1) for mounting a female die sleeve conveniently, and a plurality of lower radial grooves (26-2) which are radially arranged are uniformly distributed on the upper surface of the lower clamping plate (26) along the circumferential direction of the edge of the mounting hole (26-1); a plurality of roller assemblies which are uniformly distributed along the circumferential direction and are arranged in the radial direction are arranged in the hoop sleeve (25), and the roller assemblies, the upper radial groove (24-2) and the lower radial groove (26-2) are arranged in a one-to-one correspondence manner; after the plurality of roller assemblies and the hoop sleeves (25) are clamped between the upper clamping plate (24) and the lower clamping plate (26), the lower clamping plate (26) is fixedly connected with the lower end of the hoop sleeve (25), and the upper clamping plate (24) is fixedly connected with the lower die fixing seat (5); the roller assembly comprises a roller (27), an adjusting plate (28), a connecting plate (29) and two roller mounting plates (30) which are respectively positioned at two sides of the roller (27), the roller (27) is rotatably arranged in a roller mounting cavity formed between the two roller mounting plates (30), the two roller mounting plates (30) are fixedly connected together, wherein the edge of the roller (27) penetrates out of the roller mounting cavity to be matched with the spline type axial side wall of the forming hub with the spline type stamping die (1); the upper positioning convex plates of the two roller mounting plates (30) can be clamped in the upper radial groove (24-2) in a radially adjustable manner, the lower positioning convex plates of the two roller mounting plates (30) can be clamped in the lower radial groove (26-2) in a radially adjustable manner, the connecting plate (29), the adjusting plate (28) and the two roller mounting plates (30) are connected together, the connecting plate (29) is limited between the inner circumferential surface of the hoop sleeve (25) and the radial protrusion (26-3) on the lower clamping plate (26) between the two lower radial grooves (26-2), and the adjusting plate (28) is limited between the connecting plate (29) and the roller mounting plates (30).

6. The thin-walled gear hub rolling forming die as claimed in claim 5, wherein: the inner circle surface of the mounting hole (26-1) is provided with a convex step which is matched with the concave step on the concave die sleeve (2).

7. The thin-walled gear hub rolling forming die as claimed in claim 5, wherein: the upper end of the hoop sleeve (25) is in concave-convex fit with the upper clamping plate (24) and the lower end of the hoop sleeve (25) is in concave-convex fit with the lower clamping plate (26).

8. The thin-walled gear hub rolling forming die as claimed in claim 1, wherein: the material stripping mechanism is used for pushing a finished product to be stripped from the spline type stamping die and comprises a three-fork-shaped plate (6), and the three-fork-shaped plate (6) can be arranged in a three-fork-shaped groove (4-1) on the upper surface of an upper die fixing seat (4) in a vertically movable mode; the upper surface of the three-fork template (6) is fixedly connected with the lower end of a connecting rod (7), and the upper end of the connecting rod (7) can penetrate through a top plate (8) fixedly arranged on the upper surface of the upper die fixing seat (4) in an up-and-down motion manner and then is connected with a second driver; three upper push rods (9) are uniformly and fixedly arranged on the three-fork-shaped plate (6) along the circumferential direction, the lower end of each upper push rod (9) penetrates out of the groove bottom of the three-fork-shaped groove (4-1) and the flange part of the module connecting block (3) and then abuts against the upper material pushing plate (10), and the flange part at the upper end of the module connecting block (3) is fixed on the lower surface of the upper die fixing seat (4); the shaft part at the lower end of the module connecting block (3) penetrates through the upper material pushing plate (10) and then is fixedly connected with the spline type stamping die (1), and a material pushing sleeve (11) used for pushing a finished product to be separated from the spline type stamping die is sleeved outside the spline type stamping die (1); the flange part at the upper end of the material pushing sleeve (11) is fixedly connected with the upper material pushing plate (10), and a spline at the lower end of the material pushing sleeve (11) is in sliding fit with a spline groove on the spline type stamping die (1).

9. The thin-walled gear hub rolling forming die as claimed in claim 1, wherein: the cross-shaped protrusion on the upper surface of the spline type punch die (1) is matched with the cross-shaped groove on the lower surface of the module connecting block (3) in a clamping way.

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