CN210586947U

CN210586947U - Bending die for medical handle prefabricated blank

Info

Publication number: CN210586947U
Application number: CN201921279650.9U
Authority: CN
Inventors: 董月; 李湘军; 李建军
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 preformed blank's of medical handle mould of bending, it can solve the mould of bending of the preformed blank of current medical handle to the bending point position positioning accuracy of pole material not high, and the bending angle inaccuracy influences ultimate neck pole angle and follow-up fashioned problem of forging. The bending cushion block comprises a base, a round table is arranged on the side face, opposite to the rod material, of the base, the axis of the round table is parallel to the rod material, and the small-diameter end face of the round table stretches into the inner side of the circumferential burr of the rod material and contacts with the top plane of the rod material.

Description

Bending die for medical handle prefabricated blank

Technical Field

The utility model relates to a medical treatment orthopedic implant's precision forging field specifically is a mould of bending of prefabricated base of medical treatment handle spare.

Background

The femoral stem, a medical joint component, often has critical requirements on the angle of the neck angle. At present, the precise forging processing of the femoral stem forging generally adopts the following steps: upsetting, bending, pre-forging and finish forging. The bending step preliminarily determines the angle of the neck angle of the forge piece, and influences the subsequent forming of the forge piece and the determination of the final neck angle. The bending die adopted in the bending step is shown in figure 1, and comprises a universal upper die 1 and a universal lower die 2, wherein a bending cushion block 5 for positioning a rod material 4 is placed in a rectangular groove 3 of the lower die. The common bending cushion block is in a rectangular block structure, and the position of the bending point of the rod material is positioned by contacting the top of the rod material with the side plane of the bending cushion block. However, during the upsetting process, due to various factors such as a gap between the punch and the die, a slider guidance problem, a difference in raw material length, and the like, a certain amount of burrs are generated in one circumferential circle of the top plane of the bar material, and the lengths of the burrs are different. When present crooked cushion contacts with its side plane pole material top, in fact be the burr contact with the pole material top, because burr length shape is different, in order to adjust the bending point position, need according to different work piece requirements, select the crooked cushion of different specifications to debug, the debugging degree of difficulty is very big, and the bending point all can produce certain amount of movement when bending at every turn, the bending point position is unstable, lead to the bending angle inaccuracy, will influence final neck pole angle, and, because the bending point is the thickest cross-section department of work piece in the follow-up forging process, if the bending point is unstable, still will influence the mould filling effect of maximum cross-section position in the follow-up forging process step.

Disclosure of Invention

The mould of bending to current medical handle spare preformed base is not high to the bending point position positioning accuracy of pole material, and the bending angle is inaccurate, influences final neck pole angle and follow-up fashioned technical problem of forging, the utility model provides a mould of bending of medical handle spare preformed base, it can pinpoint the bending point position of pole material, ensures the accuracy nature of bending point position and bending angle, guarantees forging shaping effect.

The technical scheme is as follows: the utility model provides a preformed prefabricated base of medical handle's mould of bending which includes the lower mould, be equipped with crooked cushion in the rectangular channel of lower mould, its characterized in that: the bending cushion block comprises a base, a round table is arranged on the side face, opposite to the rod material, of the base, the axis of the round table is parallel to the rod material, and the small-diameter end face of the round table extends into the inner side of the circumferential burr of the rod material and is in contact with the top plane of the rod material.

It is further characterized in that:

the diameter of the rod material is 16 mm-28 mm, and the diameter of the small-diameter end face of the circular truncated cone is 3 mm-5 mm.

And the joint of the small-diameter end surface and the side surface of the circular truncated cone is rounded.

The fillet radius of the transition between the small-diameter end face and the side face of the circular truncated cone is larger than or equal to 1 mm.

The axis of the circular truncated cone is positioned above the axis of the rod material.

The base is an L-shaped block body, and the circular truncated cone is connected with the upper portion of the front side face of the vertical edge of the L-shaped block body.

The base and the round platform are integrally manufactured.

The L-shaped block is characterized by further comprising an adjusting cushion block, wherein the adjusting cushion block is a rectangular block body, is arranged in the rectangular groove and is attached to the rear side face of the vertical edge of the L-shaped block body.

The utility model has the advantages that:

the utility model discloses a bending die, its crooked cushion includes base and round platform, the axis of round platform is on a parallel with the pole material, and the minor diameter terminal surface of round platform stretch into the circumference burr inboard of pole material and with the top plane contact of pole material, thereby effectively dodge the burr, the problem that the bending point position is difficult to the adjustment because burr length difference has been avoided, bending angle also can not change because of the existence of burr, bending point position and bending angle's accuracy nature has been guaranteed, and then effectively guarantee the accurate and follow-up work step of neck pole angle the condition of filling the type, the production stability has been improved, and is simple and convenient to operate, need not special technical ability, low in labor strength.

Drawings

FIG. 1 is a schematic view showing the overall structure of a bending die for a preform of a conventional medical handle;

fig. 2 is a schematic view of the overall structure of the bending mold of the present invention;

FIG. 3 is a top view of the lower mold and the curved pad of the present invention;

fig. 4 is a sectional view taken along line a-a of fig. 3.

Reference numerals: 1-upper mould; 2-lower mould; 3-a rectangular groove; 4-rod material; 5-bending the cushion block; 6-a base; 7-a circular truncated cone; 8-burring; 9-top plane; 10-adjusting the cushion block.

Detailed Description

See fig. 2 to 4, the utility model discloses a preformed blank's of medical handle mould of bending, it includes lower mould 2, is equipped with crooked cushion 5 in the rectangular channel 3 of lower mould 2, and crooked cushion 5 includes base 6, is equipped with round platform 7 on the side of base 6 relative with pole material 4, and the axis of round platform 7 is on a parallel with pole material 4, and the minor diameter terminal surface of round platform 7 stretches into the circumference burr 8 inboard of pole material 4 and contacts with the top plane 9 of pole material 4. The diameter of the small-diameter end face of the circular truncated cone 7 is 3 mm-5 mm, the circular truncated cone is suitable for rod materials with the diameter of 16 mm-28 mm, and effective positioning of the rod materials in the bending process of the rod materials can be guaranteed. The small-diameter end face of the circular truncated cone 7 is rounded at the joint of the side face and the small-diameter end face, and the radius R of the rounded corner is larger than or equal to 1mm, so that pits caused by the circular truncated cone on the top plane of the rod material in the bending process can be avoided. The axis of the round table 7 is located above the axis of the rod material 4, the top of the rod material can be upwarped in the bending process of the rod material, and the axis of the round table is located above the axis of the rod material, so that the burrs 8 and the round table 7 can be prevented from interfering in the bending process of the rod material. The base 6 is an L-shaped block body, the circular truncated cone 7 is connected with the upper portion of the front side face of the vertical edge of the L-shaped block body, and the vertical edge and the front side face are integrally formed, so that the structure is simpler, and the processing is more convenient. In order to conveniently adjust the position of the bent cushion block, an adjusting cushion block 10 can be arranged at the rear part of the bent cushion block 5, the adjusting cushion block 10 is a rectangular block body, the adjusting cushion block 10 is arranged in the rectangular groove 3 and is attached to the rear side face of the vertical edge of the L-shaped block body, so that the generalization degree of the bent cushion block is improved, rod materials with different diameters and lengths are suitable, only the adjusting cushion block needs to be replaced before a product is changed into a series at each time, and the adjusting cushion block is simple in structure and low in manufacturing cost.

In fig. 2, 1 is an upper die of the bending die.

Claims

1. The utility model provides a preformed prefabricated base of medical handle's mould of bending which includes the lower mould, be equipped with crooked cushion in the rectangular channel of lower mould, its characterized in that: the bending cushion block comprises a base, a round table is arranged on the side face, opposite to the rod material, of the base, the axis of the round table is parallel to the rod material, and the small-diameter end face of the round table extends into the inner side of the circumferential burr of the rod material and is in contact with the top plane of the rod material.

2. The bender mould for preform of medical handle according to claim 1, wherein: the diameter of the rod material is 16 mm-28 mm, and the diameter of the small-diameter end face of the circular truncated cone is 3 mm-5 mm.

3. The bending die for the medical handle preform according to claim 1 or 2, wherein: and the joint of the small-diameter end surface and the side surface of the circular truncated cone is rounded.

4. The bender mould for a preform for a medical handle according to claim 3, wherein: the fillet radius of the transition between the small-diameter end face and the side face of the circular truncated cone is larger than or equal to 1 mm.

5. The bending die for the medical handle preform according to claim 1 or 2, wherein: the axis of the circular truncated cone is positioned above the axis of the rod material.

6. The bending die for the medical handle preform according to claim 1 or 2, wherein: the base is an L-shaped block body, and the circular truncated cone is connected with the upper portion of the front side face of the vertical edge of the L-shaped block body.

7. The bender mould for a preform for a medical handle according to claim 6, wherein: the base and the round platform are integrally manufactured.

8. The bender mould for a preform for a medical handle according to claim 6, wherein: the L-shaped block is characterized by further comprising an adjusting cushion block, wherein the adjusting cushion block is a rectangular block body, is arranged in the rectangular groove and is attached to the rear side face of the vertical edge of the L-shaped block body.