CN219004441U - Split tibia support forging die - Google Patents

Abstract

The utility model discloses a split tibia support forging die, which belongs to the technical field of artificial joint forging dies, and comprises: the upper surface of the die sleeve is provided with an installation groove; the core mold can be installed in the installation groove, and the matching surfaces of the core mold and the installation groove are inclined surfaces; the core mould consists of a plurality of modules which are mutually matched to form a tibia support cavity; the adjacent modules are provided with matched parting surfaces, the parting surfaces are vertical surfaces, and the tibia tray cavity penetrates through the parting surfaces along the vertical direction; according to the utility model, the mandrel is divided into a plurality of modules along the depth direction of the tibial tray cavity, and corresponding cavity surfaces are processed on each module, so that the processing depth is greatly reduced, the processing can be performed in a milling mode, the current situation of single electric processing is changed, and compared with the electric processing, the processing efficiency is higher, and the processing precision and the surface quality of the cavity are better; the artificial influence on the precision of the tibial tray cavity is avoided, and the workload is reduced; the repair of the die is also more convenient and quick.

Description

Split tibia support forging die

Technical Field

The utility model relates to the technical field of artificial joint forging dies, in particular to a split tibia support forging die.

Background

The artificial joint tibial tray is generally forged by an integral die to produce a blank, and the existing integral die has the following defects in the processing process: 1. the cross section of the tibial tray cavity of the die is narrow but the depth is deeper, only an electric spark machine tool can be used for processing along the direction from outside to inside, but the precision of the tibial tray cavity processed by the electric spark machine tool is lower, the surface quality is poorer, after the processing is finished, the surface of the tibial tray cavity also needs to be polished manually, and the precision of the tibial tray cavity is greatly influenced by people; 2. because the tibia support cavity of the die is narrow and has large depth, the subsequent polishing and repairing and surface treatment procedures of electric spark processing are very limited, and the surface of the tibia support cavity is extremely easy to damage; 3. after the integral die reaches the service life, the integral die can not be basically repaired and reused. The problems are solved, the manufacturing difficulty and the manufacturing cost of the tibial tray die are greatly increased, the precision of the tibial tray cavity is difficult to ensure, and the quick development of the industry is not facilitated.

Therefore, designing a forging die with lower manufacturing difficulty and cost, higher machining precision of the tibial tray cavity and better surface quality is a problem to be solved in the current stage.

Disclosure of Invention

For the problems existing in the prior art, the split tibia support forging die provided by the utility model can be used for machining in a milling mode, so that the current situation of single electric machining is changed, the machining efficiency is higher, the machining precision and the surface quality of a cavity are better, the machining precision is prevented from being influenced manually, and the die is more convenient and faster to repair.

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

the utility model provides a split tibia support forging die, which comprises:

the upper surface of the die sleeve is provided with an installation groove;

the core mold can be installed in the installation groove, and the matching surfaces of the core mold and the installation groove are inclined surfaces; the core mould consists of a plurality of modules, and the modules are mutually matched to form a tibia support cavity; and matched parting surfaces are arranged between the adjacent modules, the parting surfaces are vertical surfaces, and the tibia tray cavity penetrates through the parting surfaces along the vertical direction.

As a preferable technical scheme, the matching surfaces of the core mold and the mounting groove are inclined outwards along the direction away from the mounting groove.

As a preferable technical scheme, an included angle between a matching surface of the core mold and the mounting groove and a vertical surface is set to be 3 degrees.

As a preferable technical scheme, the bottom of the mounting groove is provided with an exhaust hole.

As a preferred embodiment, a plurality of the modules are provided as a first module and a second module.

As a preferable technical scheme, the parting surface of the first module is provided with a locating pin, and the parting surface of the second module is provided with a locating groove; when the first module is matched with the second module, the locating pin is embedded into the locating groove.

As a preferable technical scheme, two positioning pins are arranged, and the two positioning pins are respectively positioned at two sides of the tibia tray cavity; the positions and the number of the positioning grooves are matched with those of the positioning pins.

As a preferable technical scheme, the positioning pin is a square pin, and the positioning groove is a square groove matched with the square pin.

As a preferable technical scheme, the matched parting surfaces are respectively provided with a connecting hole and a screw hole, and a screw can pass through the connecting hole and be in threaded connection with the screw hole; the axes of the connecting hole and the screw hole are perpendicular to the parting surface.

As a preferred solution, the gap between the modules after mating is less than 0.01mm.

The beneficial effects of the utility model are as follows:

according to the utility model, the mandrel is divided into a plurality of modules along the depth direction of the tibial tray cavity, and corresponding cavity surfaces are processed on each module, so that the processing depth is greatly reduced, the processing can be performed in a milling mode, the current situation of single electric processing is changed, and compared with the electric processing, the processing efficiency is higher, and the processing precision and the surface quality of the cavity are better; after milling, the surface of the tibial tray cavity is free of a remelting layer, and the clamp repair is only needed to remove the cutter lines, so that the precision of the tibial tray cavity is prevented from being influenced by human factors, the polishing thickness of the clamp repair can be reduced, and the workload is reduced; the repair of the die is also more convenient and quick.

Drawings

FIG. 1 is a schematic view of the overall structure of one embodiment of a split tibial tray forging die of the present utility model;

FIG. 2 is a schematic view of the die sleeve of FIG. 1;

FIG. 3 is a schematic diagram of the first module in FIG. 1;

FIG. 4 is a cross-sectional view taken along the direction A-A in FIG. 3;

fig. 5 is a schematic structural diagram of the second module in fig. 1.

In the figure: 1-die sleeve, 11-mounting groove, 12-exhaust hole, 2-mandrel, 21-first module, 22-second module, 3-shin bone holds in the palm die cavity, 4-die parting plane, 41-locating pin, 42-constant head tank, 43-connecting hole, 44-screw.

Detailed Description

The present utility model is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.

Referring to fig. 1-5, an embodiment of a split tibial tray forging die according to the present utility model includes: the die sleeve 1 is provided with a mounting groove 11 for placing the core die 2 on the upper surface of the die sleeve 1; the core mold 2 can be arranged in the mounting groove 11, the matching surfaces of the core mold 2 and the mounting groove 11 are inclined planes, the core mold 2 and the mounting groove 11 are in wedge-shaped fit, the tighter the core mold 2 is in the forging use process, the looseness of the two modules is avoided, and meanwhile, the disassembly and the separation are convenient for repair; the mandrel 2 is formed by splicing two modules, namely a first module 21 and a second module 22, and the two modules are matched with each other to form a tibia tray cavity 3; the die joint 4 of module is vertical face, and the die joint 4 is link up to the tibia holds in the palm die cavity 3 along vertical direction, and first module 21 and second module 22 will narrow and the big tibia of degree of depth hold in the palm die cavity 3 and divide into two halves along its length direction, respectively process corresponding tibia on the die joint 4 of first module 21 and second module 22 hold in the palm the die cavity 3 surface can, have changed the processing direction on tibia hold in the palm the die cavity 3 surface, great reduction the machining depth, can use the mode of milling to replace electric processing, machining efficiency is higher, machining precision and the surface quality of die cavity are better.

On the premise of ensuring that the tibial tray cavity 3 can be formed after all the modules are matched, the mandrel 2 can also be composed of three or more modules according to actual production requirements; after milling the surface of the tibia support cavity 3 on the parting surface 4, the surface is free of a remelting layer, and the clamp repair is only needed to remove the tool lines, so that the precision of the tibia support cavity 3 is basically prevented from being controlled by people, and meanwhile, the polishing thickness of the clamp repair can be reduced, and the workload is reduced; the utility model can be conveniently used in a descending manner in the subsequent use, and compared with the electric processing, the utility model can be more convenient and rapid in descending and repairing and is convenient to maintain.

In this embodiment, referring to fig. 2 and 3, the mating surfaces of the core mold 2 and the mounting groove 11 are inclined outwardly in a direction away from the mounting groove 11, so that the core mold 2 is placed in the mounting groove 11; specifically, the angle between the mating surface of the core mold 2 and the mounting groove 11 and the vertical surface is preferably set to 3 °, that is, the angle α between the opposite side surfaces of the mounting groove 11 and the opposite side surfaces of the core mold 2 is 6 °.

In this embodiment, referring to fig. 2, the bottom of the installation groove 11 is provided with a vent hole 12, and when the core mold 2 is installed, air in the installation groove 11 can be exhausted from the vent hole 12, and when the part is forged, the vent hole 12 can realize a vent function.

In this embodiment, referring to fig. 3 to 5, a positioning pin 41 is disposed on the parting surface 4 of the first module 21, and a positioning slot 42 is disposed on the parting surface 4 of the second module 22; when the first module 21 is matched with the second module 22, the positioning pins 41 are embedded into the positioning grooves 42, so that the relative movement between the first module 21 and the second module 22 can be limited, the die clamping positions of the first module 21 and the second module 22 are accurate and stable, and the die error is reduced; specifically, two positioning pins 41 are provided, and the two positioning pins 41 are respectively positioned at two sides of the tibia tray cavity 3; the positions and the number of the positioning grooves 42 are matched with those of the positioning pins 41; the mating alignment pin 41 and the alignment slot 42 can effectively align the first module 21 with the second module 22.

On the basis of the foregoing embodiment, referring to fig. 3 to 5, the positioning pin 41 is a square pin, and the positioning groove 42 is a square groove matching the square pin; in other embodiments, the positioning pin 41 may be cylindrical or polyhedral, and the positioning slot 42 may be matched to the shape of the positioning pin so as to firmly position the first module 21 and the second module 22.

In this embodiment, referring to fig. 3 to 5, the matched parting surface 4 is provided with a connecting hole 43 and a screw hole 44, and the screw can pass through the connecting hole 43 and be in threaded connection with the screw hole 44; the axes of the connecting hole 43 and the screw hole 44 are perpendicular to the parting surface 4; specifically, a connecting hole 43 and a screw hole 44 can be respectively arranged on two sides of the parting surface 4 of the first module 21, which are positioned on the tibial tray cavity 3, correspondingly, a screw hole 44 and a connecting hole 43 are respectively arranged at corresponding positions on the parting surface 4 of the second module 22, and the two screws respectively pass through the connecting hole 43 and the screw hole 44 in turn from opposite directions to be in threaded connection, so that the first module 21 and the second module 22 can be firmly and fixedly connected; further, the connecting hole 43 is preferably provided as a counter bore so that the head of the screw can be buried in the counter bore, thereby preventing the screw from affecting the installation and removal of the core mold 2.

It should be noted that the parting surface 4 should have a better flatness, so that the clearance between the matched modules is smaller than 0.01mm, and the entering of the profile during forging can be effectively prevented, and burr flash is formed.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A split tibial tray forging die, comprising:

the upper surface of the die sleeve is provided with an installation groove;

the core mold can be installed in the installation groove, and the matching surfaces of the core mold and the installation groove are inclined surfaces; the core mould consists of a plurality of modules, and the modules are mutually matched to form a tibia support cavity; and matched parting surfaces are arranged between the adjacent modules, the parting surfaces are vertical surfaces, and the tibia tray cavity penetrates through the parting surfaces along the vertical direction.

2. The split tibial tray forging die as recited in claim 1, wherein mating surfaces of the core die and the mounting slot are each inclined outwardly in a direction away from the mounting slot.

3. The split tibial tray forging die as recited in claim 2, wherein an angle between a mating surface of the core die and the mounting groove and a vertical surface is set to 3 °.

4. The split tibial tray forging die as recited in claim 1 or 2, wherein the bottom of the mounting slot is provided with an air vent.

5. The split tibial tray forging die as recited in claim 1, wherein a plurality of said modules are provided as a first module and a second module.

6. The split tibial tray forging die according to claim 5, wherein a locating pin is arranged on the parting surface of the first module, and a locating slot is arranged on the parting surface of the second module; when the first module is matched with the second module, the locating pin is embedded into the locating groove.

7. The split tibial tray forging die as set forth in claim 6, wherein two of the positioning pins are provided, and the two positioning pins are respectively positioned at two sides of the tibial tray cavity; the positions and the number of the positioning grooves are matched with those of the positioning pins.

8. The split tibial tray forging die as recited in claim 6 or 7, wherein said locating pin is provided as a square pin and said locating slot is provided as a square slot matching said square pin.

9. The split tibial tray forging die according to claim 1 or 5, wherein the matched parting surfaces are respectively provided with a connecting hole and a screw hole, and a screw can pass through the connecting hole and is in threaded connection with the screw hole; the axes of the connecting hole and the screw hole are perpendicular to the parting surface.

10. A split tibial tray forging die according to claim 1 or claim 5 wherein the gap between the mated modules is less than 0.01mm.

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