CN210586948U

CN210586948U - Die for preparing medical hip joint handle blank

Info

Publication number: CN210586948U
Application number: CN201921280701.XU
Authority: CN
Inventors: 李建军; 董月; 李湘军
Original assignee: Wuxi Hyatech Technology Co ltd
Current assignee: Wuxi Hyatech Technology Co ltd
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2020-05-22
Anticipated expiration: 2029-08-08

Abstract

The utility model provides a mould for preparing medical treatment hip joint handle system blank, it can solve when using current kicking die and bending die to be equipped with the blank of medical treatment hip joint handle spare, can produce sharp-pointed burr, pit and by burr, pit receive the folding that the extrusion leads to, need throw to repair and get rid of, lead to throwing to repair work load greatly increased's problem. The bending die comprises a heading die and a bending die, wherein the joint of an upper die cavity of the heading die and a parting surface thereof and the joint of a lower die cavity of the heading die and the parting surface thereof are rounded off; the middle part of the convex die part of the upper die of the bending die and the middle part of the lower die cavity of the bending die are respectively provided with a U-shaped groove for avoiding burrs along the respective length directions; the position of the convex die part, which is contacted with the upsetting piece, is provided with a profiling groove, and the shape of the profiling groove is matched with the shape of the part of the upsetting piece, which is extruded by the convex die part.

Description

Die for preparing medical hip joint handle blank

Technical Field

The utility model relates to a precision forging processing field of medical orthopedic implant specifically is a mould for preparing medical treatment hip joint handle system blank.

Background

The blank manufacturing step of the medical hip joint handle part is to use a horizontal forging machine to perform blank manufacturing, the blank manufacturing comprises two forming steps of upsetting and bending, wherein when the upsetting part is formed, an upper upsetting die and a lower upsetting die are required to clamp a bar material, the bar material is placed in a space defined by an upper die cavity and a lower die cavity of the upsetting dies, the requirement on the size precision of the bar material is high, the clamping force of the horizontal forging machine is limited to be small, and in the actual production process, the phenomenon that the bar material cannot be clamped tightly so that the formed upsetting part generates sharp burrs with different sizes at the gap between the parting surfaces of the two upsetting dies easily occurs; when a bent part is formed, the upset part is placed on a lower die cavity of the bending die, the upper die of the bending die moves downwards and bends the upset part by utilizing the male die part of the upper die, and because the contact area of the upset part and the male die part of the upper die of the bending die is small, and the contact points of the upset part, the upper die and the lower die of the bending die are both positioned on the parting surface of the upset part, a pit is generated at the contact position of the upset part and the male die part when the upset part is stressed and bent, and burrs and pits at the parting surface of the upset part can be folded after being extruded. The generated sharp burrs and pits and the folding caused by the extrusion of the burrs and the pits need to be removed by polishing, so that the polishing workload is greatly increased.

Disclosure of Invention

When being equipped with the blank of medical hip joint handle spare to using current kicking die and bending die, can produce sharp-pointed burr, pit, folding, need throw to repair and get rid of, lead to throwing to repair work load greatly increased's technical problem, the utility model provides a mould for preparing medical hip joint handle system blank, it can avoid forming sharp-pointed burr, reduces the pit degree of depth simultaneously to avoid by burr, pit receive the folding of extrusion formation, and then the follow-up work load of repairing of throwing of significantly reducing.

The technical scheme is as follows: a mold for preparing a medical hip joint stem blank, comprising a heading die and a bending die, characterized in that: the joint between the upper die cavity of the upsetting die and the upper die parting surface thereof and the joint between the lower die cavity of the upsetting die and the lower die parting surface thereof are rounded; the middle part of the convex die part of the upper die of the bending die and the middle part of the lower die cavity of the bending die are respectively provided with a U-shaped groove for avoiding burrs along the respective length directions; a profiling groove is formed in the position, in contact with the upsetting piece, of the male die portion, and the shape of the profiling groove is matched with the shape of the portion, extruded by the male die portion, of the upsetting piece.

It is further characterized in that:

the fillet radius of the connecting part of the upper die cavity of the upsetting die and the upper die parting surface of the upsetting die is equal to that of the connecting part of the lower die cavity of the upsetting die and the lower die parting surface of the upsetting die, and the fillet radius is 2-4 mm.

And a material clamping groove vertically communicated with the lower mold cavity of the upsetting die is also formed in the lower mold of the upsetting die, and the joint of the lower mold cavity of the upsetting die and the material clamping groove is rounded.

And the radius of a fillet at the joint of the lower die cavity of the upsetting die and the material clamping groove is 2-4 mm.

The depth of the material clamping groove is smaller than that of a lower die cavity of the heading die.

The lower part of the convex die part is rounded and the radius of the rounded corner is 15 mm-25 mm.

The size of the U-shaped groove is 1 mm-2 mm larger than that of the burr.

And the joint of the convex die part of the bending die and the corresponding U-shaped groove and the joint of the lower die cavity of the bending die and the corresponding U-shaped groove are rounded.

The radius of the round corner of the U-shaped groove corresponding to the convex die part of the bending die is equal to the radius of the round corner of the U-shaped groove corresponding to the lower die cavity of the bending die, and the radius of the round corner is 3 mm-5 mm.

The utility model has the advantages that:

the utility model discloses a mould for preparing medical treatment hip joint handle system blank, through the switching department at the cope match-die cavity of kicking die rather than the parting line, the switching department fillet of lower mould chamber rather than the parting line, thereby can reduce the requirement to bar diameter size precision under the unchangeable condition of kicking die cope match-die cavity and lower mould chamber size, when continuing to pack to the parting line clearance after the bar is full of the kicking die cavity simultaneously, under the effect of chamfer, the kicking part will no longer form sharp-pointed burr at the parting line department, but form the mellow burr unanimous with chamfer radius size; the U-shaped grooves are formed in the upper die and the lower die of the bending die, so that round burrs on the upset forging piece can be avoided well, and the round burrs are prevented from being extruded by the bending die to be folded; the profiling groove is formed in the male die part of the bending die, so that the contact area between the male die part and the top forging piece can be increased, the depth of a pit generated by extrusion of the top forging piece is reduced, and the pit is prevented from being extruded to be folded; thereby use the utility model discloses a mould blanking, the volume of sharp-pointed burr that can significantly reduce reduces the pit degree of depth simultaneously to avoid burr and pit to receive the extrusion to lead to folding, and then the follow-up work load of repairing of throwing of significantly reducing also can reduce the folding risk of follow-up shaping process step.

Drawings

Fig. 1 is a main sectional view of a heading die of the present invention;

fig. 2 is a schematic view of the overall structure of the upper die of the heading die of the present invention;

FIG. 3 is a schematic view of the overall structure of the lower die of the heading die of the present invention;

fig. 4 is a front view of the bending die of the present invention;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;

fig. 6 is a schematic view of the entire structure of the upper die of the bending die of the present invention;

fig. 7 is a schematic view of the overall structure of the lower die of the bending die of the present invention.

Reference numerals: 1-ejecting a forging piece; 2-burring; 3-a bar stock; 10-heading die; 11-an upper die cavity of the heading die; 12-upper die parting surface; 13-round corner one; 14-lower mould cavity of the heading die; 15-lower die parting surface; 16-fillet two; 17-a material clamping groove; 18-round corner three; 20-bending a die; 21-upper die of bending die; 22-male mold portion; 23-a lower mold cavity of the bending mold; 24-U-shaped groove; 25-a profiling groove; 26-fillet four; 27-fillet five; 28-six fillets.

Detailed Description

Referring to fig. 1 to 7, the utility model discloses a mould for preparing medical treatment hip joint handle system blank, it includes forging die 10 and bending die 20, the first 13 of transition department fillet of the last mould cavity 11 of forging die rather than last mould parting line 12, the second 16 of transition department fillet of the lower mould cavity 14 of forging die rather than lower mould parting line 15, the fillet radius of the first 13 and second 16 of fillet equals, and is 2mm ~4 mm; the middle parts of a male die part 22 of an upper die 21 of the bending die and a lower die cavity 23 of the bending die are respectively provided with a U-shaped groove 24 for avoiding the burr 2 along the respective length directions; the position where the convex die part 22 contacts with the top forging 1 is provided with a profiling groove 25, and the shape of the profiling groove 25 is matched with the shape of the part of the top forging 1 extruded by the convex die part 22. In fig. 1, 3 is a bar stock.

Referring to fig. 3, a material clamping groove 17 vertically communicated with a lower die cavity 14 of the upsetting die is further formed in the lower die of the upsetting die, the depth of the material clamping groove 17 is smaller than that of the lower die cavity 14 of the upsetting die, a third fillet 18 is formed at the joint of the lower die cavity 14 of the upsetting die and the material clamping groove 17, and the fillet radius of the third fillet 18 is 2 mm-4 mm. So designed, can further reduce the quantity that produces sharp burr.

Referring to fig. 6, the lower portion of the male mold portion 22 is rounded at four corners 26, and the radius of the rounded at four corners 26 is 15 mm-25 mm. The medical hip joint handle has the advantages that the medical hip joint handle is bent at 125-135 degrees, and the requirement of bending angle of 125-135 degrees can be better met by chamfering the lower part of the convex die part by a fillet of 15-25 mm.

As shown in FIG. 5, the size of the U-shaped groove 24 is 1 mm-2 mm larger than that of the burr 2. So can be better dodge the burr, avoid the extrusion in-process burr folding.

5-7, the junction of the male die part 22 of the bending die 20 and the corresponding U-shaped groove 24 is rounded five 27, the junction of the lower die cavity 23 of the bending die and the corresponding U-shaped groove 24 is rounded six 28, and the radiuses of the rounded five 27 and the rounded six 28 are equal and are 3-5 mm. So can further dodge the burr, avoid the extrusion in-process burr folding.

Claims

1. A mold for preparing a medical hip joint stem blank, comprising a heading die and a bending die, characterized in that: the joint between the upper die cavity of the upsetting die and the upper die parting surface thereof and the joint between the lower die cavity of the upsetting die and the lower die parting surface thereof are rounded; the middle part of the convex die part of the upper die of the bending die and the middle part of the lower die cavity of the bending die are respectively provided with a U-shaped groove for avoiding burrs along the respective length directions; a profiling groove is formed in the position, in contact with the upsetting piece, of the male die portion, and the shape of the profiling groove is matched with the shape of the portion, extruded by the male die portion, of the upsetting piece.

2. A mould for the preparation of a medical hip stem blank according to claim 1, wherein: the fillet radius of the connecting part of the upper die cavity of the upsetting die and the upper die parting surface of the upsetting die is equal to that of the connecting part of the lower die cavity of the upsetting die and the lower die parting surface of the upsetting die, and the fillet radius is 2-4 mm.

3. A mould for the preparation of a medical hip stem blank according to claim 1 or 2, wherein: and a material clamping groove vertically communicated with the lower mold cavity of the upsetting die is also formed in the lower mold of the upsetting die, and the joint of the lower mold cavity of the upsetting die and the material clamping groove is rounded.

4. A mould for the preparation of a medical hip stem blank according to claim 3, wherein: and the radius of a fillet at the joint of the lower die cavity of the upsetting die and the material clamping groove is 2-4 mm.

5. A mould for the preparation of a medical hip stem blank according to claim 3, wherein: the depth of the material clamping groove is smaller than that of a lower die cavity of the heading die.

6. A mould for the preparation of a medical hip stem blank according to claim 1 or 2, wherein: the lower part of the convex die part is rounded and the radius of the rounded corner is 15 mm-25 mm.

7. A mould for the preparation of a medical hip stem blank according to claim 1 or 2, wherein: the size of the U-shaped groove is 1 mm-2 mm larger than that of the burr.

8. A mould for the preparation of a medical hip stem blank according to claim 1 or 2, wherein: and the joint of the convex die part of the bending die and the corresponding U-shaped groove and the joint of the lower die cavity of the bending die and the corresponding U-shaped groove are rounded.

9. A mould for the preparation of a medical hip stem blank according to claim 8, wherein: the radius of the round corner of the U-shaped groove corresponding to the convex die part of the bending die is equal to the radius of the round corner of the U-shaped groove corresponding to the lower die cavity of the bending die, and the radius of the round corner is 3 mm-5 mm.