CN212169199U - Special tungsten carbide rotary file for polishing femoral condyle of artificial joint - Google Patents
Special tungsten carbide rotary file for polishing femoral condyle of artificial joint Download PDFInfo
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- CN212169199U CN212169199U CN202020859499.2U CN202020859499U CN212169199U CN 212169199 U CN212169199 U CN 212169199U CN 202020859499 U CN202020859499 U CN 202020859499U CN 212169199 U CN212169199 U CN 212169199U
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- rotary file
- filing
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Abstract
The utility model relates to a special tungsten carbide rotary file for polishing the femoral condyle of an artificial joint, which comprises a rod body, wherein the end part of the rod body extends forwards to form a cylindrical part, the end part of the cylindrical part extends forwards to form a grinding part, the end part of the grinding part extends forwards to form a file tooth part, and the rod body, the cylindrical part, the grinding part and the file tooth part are positioned on the same straight line and jointly form the rotary file with an integrated structure; the outer wall surface of the grinding part is provided with a single-edge blade, the end part of the filing part is of a sharp-angled structure, and the outer wall surface of the filing part is provided with a double-edge blade of a crossed structure; the single-sided edge of the grinding part is fast in material removal and chip removal due to steep angle and deep groove, is preferentially used for removing most of metal cast tumors, and is matched with the shape modification of the filing part to obtain good surface finish; the utility model is used for get rid of the iron bean of various dead angle positions, cast the tumour, improved the product percent of pass greatly, reduced personnel working time to guarantee product quality, guaranteed product surface quality when especially improving work efficiency.
Description
Technical Field
The utility model belongs to the technical field of the metalworking instrument technique and specifically relates to a special tungsten carbide rotary file of artifical joint thighbone condyle polishes.
Background
The investment casting process is also called lost wax casting, and is an ancient casting and forming process. Investment casting has two major advantages, one is: the cast product can obtain high dimensional accuracy and surface finish, so that the machining work can be greatly reduced. II, secondly: the casting method can be used for casting complex parts made of various metal materials, particularly for casting high-temperature alloy castings such as blades of aircraft engines, artificial joints and the like, and the streamline external contour and the internal airflow channel of the casting method can hardly be formed by a machining process. The production by using the investment casting process not only can realize batch production, but also can avoid residual stress after mechanical processing.
The investment casting is to make the material which is easy to melt into the shape of the product, coat a plurality of layers of special refractory materials on the surface, spray sand, form an integral model after drying and hardening, and remove the material in the model to obtain a hollow shell.
In the process of manufacturing the shell, slurry dipping is particularly important, and especially for parts with complex structures, such as artificial joint femoral condyles, bubbles are easily left in grooves and corners during slurry dipping operation; during the subsequent pouring process, the air-held positions of the air bubbles can generate casting nodules, namely iron beans. The iron beans at the dead angle position are very difficult to remove, parts can be scrapped by carelessness during polishing, and the qualification rate of products is greatly reduced. The polishing consumables in the prior art can not well remove iron beans at various dead angle positions on the femoral condyle of the artificial joint from the aspects of shape, texture and material.
SUMMERY OF THE UTILITY MODEL
The applicant aims at the defects in the prior art and provides the special tungsten carbide rotary file for polishing the femoral condyle of the artificial joint, which is reasonable in structure, so that the product percent of pass is greatly improved, the labor time of personnel is reduced, the product quality is ensured, and particularly, the surface quality of the product is ensured while the working efficiency is improved.
The utility model discloses the technical scheme who adopts as follows:
a special tungsten carbide rotary file for polishing a femoral condyle of an artificial joint comprises a rod body, wherein a cylindrical part extends forwards from the end part of the rod body, a grinding part extends forwards from the end part of the cylindrical part, a file tooth part extends forwards from the end part of the grinding part, and the rod body, the cylindrical part, the grinding part and the file tooth part are positioned on the same straight line and form a rotary file with an integrated structure; the outer wall surface of the grinding part is provided with a single-edge blade, the end part of the filing tooth part is of a sharp-angled structure, and the outer wall surface of the filing tooth part is provided with a double-edge blade of a crossed structure.
As a further improvement of the above technical solution:
the grinding part is of a waist drum type structure, and the diameter of one end, close to the filing part, of the grinding part is smaller than that of one end, far away from the filing part.
The grinding part is connected with the cylindrical part to form a step, and the diameter of the cylindrical part is smaller than that of the grinding part connected with the cylindrical part; the diameter of the grinding part is gradually reduced towards the direction of the filing tooth part; the outer wall surface of the filing tooth part is in transition connection with the small end of the grinding part.
The cross section of the filing tooth part is of a triangular structure, and the angle of the sharp angle of the filing tooth part is 30 degrees.
The edge-forming angle of the single-side edge is smaller than that of the double-side edge; the depth of the grooves between the teeth of the single-edge blades is greater than that of the grooves between the teeth of the double-edge blades.
The single-edge has an edge forming angle of 25 degrees, and the double-edge has an edge forming angle of 45 degrees.
The depth of the grooves between the teeth of the single-edge blade is 0.7mm, and the depth of the grooves between the teeth of the double-edge blade is 0.2-0.3 mm.
The diameter of cylinder portion is greater than the diameter of barrel, and the department that meets of cylinder portion and barrel passes through arc structure transitional coupling.
The length of the filing tooth part is 2.5mm, and the length of the grinding part is 5 mm.
The rotary file is made of HRC 45-50 tungsten carbide.
The utility model has the advantages as follows:
the utility model has compact and reasonable structure and convenient operation, preferentially removes most of metal cast nodules through the unilateral edge of the grinding part with steep angle and deep groove, and has deep material removal and quick chip removal; and the grinding of the iron beans on the part is completed by matching with the shape modification of the filing tooth part, so that the part with qualified size and good appearance is obtained, the working efficiency is greatly improved, the product percent of pass is improved, the labor intensity of personnel is reduced, and the product quality is ensured.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
Wherein: 1. a barrel; 2. a cylindrical portion; 3. a grinding section; 4. filing the tooth part; 5. an arc-shaped structure; 31. a single-sided blade; 32. a step; 41. double-edged.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, the special tungsten carbide rotary file for grinding the femoral condyle of the artificial joint of the present embodiment comprises a rod body 1, a cylindrical portion 2 extends forwards from the end of the rod body 1, a grinding portion 3 extends forwards from the end of the cylindrical portion 2, a tooth filing portion 4 extends forwards from the end of the grinding portion 3, and the rod body 1, the cylindrical portion 2, the grinding portion 3 and the tooth filing portion 4 are located on the same straight line and jointly form an integrated rotary file; the outer wall surface of the grinding part 3 is provided with a single-edge blade 31, the end part of the file tooth part 4 is of a sharp-angled structure, and the outer wall surface of the file tooth part 4 is provided with a double-edge blade 41 of a crossed structure.
The grinding part 3 is of a waist drum type structure, and the diameter of one end of the grinding part 3 close to the filing tooth part 4 is smaller than that of one end far away from the filing tooth part 4.
The joint of the grinding part 3 and the cylindrical part 2 forms a step 32, and the diameter of the cylindrical part 2 is smaller than that of the grinding part 3 at the joint; the diameter of the grinding portion 3 gradually decreases toward the rasp tooth portion 4; the outer wall surface of the filing tooth part 4 is transitionally connected with the small end of the grinding part 3.
As shown in fig. 2, the cross-section of the tooth portion 4 is triangular, and the angle a at the tip of the tooth portion 4 is 30 °, which helps to obtain a good finish during trimming.
The edge-cutting angle of the single-side edge 31 is smaller than that of the double-side edge 41; the depth of the groove between the blade teeth of the single-side blade 31 is greater than that of the groove between the blade teeth of the double-side blade 41; the edging angle is an included angle formed between the blade teeth and the central axis of the rotary file; the single-edge blade 31 has a steep angle and a deep groove, so that the material removing is deep, the chip removal is fast, most of metal cast nodules are preferentially removed, the polishing time is greatly shortened, the edge rolling caused by polishing is avoided for the single-edge blade 31, and the polishing efficiency is high; the double-edge 41 has a gentle angle and a shallow groove compared with the single-edge 31, and is used for subsequent shape modification and assisting in ensuring the size and appearance quality of parts.
The single-sided blade 31 has an edge angle θ of 25 °, and the double-sided blade 41 has an edge angle β of 45 °.
The depth of the groove between the 31 blade teeth of the single-edge blade is 0.7mm, and the depth of the groove between the 41 blade teeth of the double-edge blade is 0.2-0.3 mm.
The diameter of cylinder portion 2 is greater than the diameter of barrel 1, and cylinder portion 2 passes through arc structure 5 transitional coupling with barrel 1 junction.
The length L of the filing tooth part 4 is 2.5mm, and the length of the grinding part 3 is 5 mm; the total length of the rotary file is 35mm, and the diameter of the rod body 1 is 3 mm.
The diameter of the barrel 1 can be set according to the tool to be held, and the length of the barrel 1 is greater than the depth of each corner of the part.
The rotary file is made of HRC 45-50 tungsten carbide; the hardness of the artificial joint material is generally lower than HRC30, and the service life of the rotary file is prolonged by using a tungsten carbide material of HRC 45-50, and the material cost is saved.
In this embodiment, the number of the grooves between the teeth of the single-side edge 31 is 18.
The utility model discloses an application principle does:
the rod body 1 of the rotary file is arranged on a pneumatic straight grinding machine, and most of metal cast tumors on a part are removed by adopting a single-edge blade 31 of a grinding part 3 with a steep angle and a deep groove; the shape and the structure of the part body are kept unchanged in the area polished by the grinding part 3, and a small amount of redundant material is left in the casting tumor part; and then the double-edge blades 41 are adopted to process the residual metal material, so that the polishing of the metal casting tumors on the part is completed, and the double-edge blades 41 with the depth of 0.2-0.3 mm and the crossed structure ensure the good appearance quality of the part during the shape modification.
The utility model is simple in operation, convenient to use is reliable, has improved work efficiency and product percent of pass greatly, has guaranteed product quality.
The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made within the scope of the invention.
Claims (10)
1. The utility model provides a special tungsten carbide rotary file of artifical joint thighbone condyle of polishing which characterized in that: the electric flat bar comprises a bar body (1), wherein a cylindrical part (2) extends forwards from the end part of the bar body (1), a grinding part (3) extends forwards from the end part of the cylindrical part (2), a file tooth part (4) extends forwards from the end part of the grinding part (3), and the bar body (1), the cylindrical part (2), the grinding part (3) and the file tooth part (4) are positioned on the same straight line and jointly form a rotary file with an integrated structure; the outer wall surface of the grinding part (3) is provided with a single-edge blade (31), the end part of the filing tooth part (4) is of a sharp-angled structure, and the outer wall surface of the filing tooth part (4) is provided with a double-edge blade (41) of a crossed structure.
2. The special tungsten carbide rotary file for grinding the femoral condyle of the artificial joint as claimed in claim 1, wherein: the grinding part (3) is of a waist drum type structure, and the diameter of one end, close to the filing tooth part (4), of the grinding part (3) is smaller than the diameter of one end, far away from the filing tooth part (4).
3. The special tungsten carbide rotary file for grinding the femoral condyle of the artificial joint as claimed in claim 1, wherein: the joint of the grinding part (3) and the cylindrical part (2) forms a step (32), and the diameter of the cylindrical part (2) is smaller than that of the grinding part (3) at the joint; the diameter of the grinding part (3) is gradually reduced towards the direction of the filing tooth part (4); the outer wall surface of the filing tooth part (4) is in transition connection with the small end of the grinding part (3).
4. The special tungsten carbide rotary file for grinding the femoral condyle of the artificial joint as claimed in claim 1, wherein: the cross section of the filing tooth part (4) is of a triangular structure, and the angle of the sharp angle of the filing tooth part (4) is 30 degrees.
5. The special tungsten carbide rotary file for grinding the femoral condyle of the artificial joint as claimed in claim 1, wherein: the edge-forming angle of the single-side edge (31) is smaller than that of the double-side edge (41); the depth of the groove between the blade teeth of the single-side blade (31) is greater than that of the groove between the blade teeth of the double-side blade (41).
6. The special tungsten carbide rotary file for grinding the femoral condyle of the artificial joint as claimed in claim 5, wherein: the single-side edge (31) has an edge forming angle of 25 degrees, and the double-side edge (41) has an edge forming angle of 45 degrees.
7. The special tungsten carbide rotary file for grinding the femoral condyle of the artificial joint as claimed in claim 5, wherein: the depth of the grooves between the blade teeth of the single-side blade (31) is 0.7mm, and the depth of the grooves between the blade teeth of the double-side blade (41) is 0.2-0.3 mm.
8. The special tungsten carbide rotary file for grinding the femoral condyle of the artificial joint as claimed in claim 1, wherein: the diameter of the cylindrical part (2) is larger than that of the rod body (1), and the joint of the cylindrical part (2) and the rod body (1) is in transition connection through an arc-shaped structure (5).
9. The special tungsten carbide rotary file for grinding the femoral condyle of the artificial joint as claimed in claim 1, wherein: the length of the filing tooth part (4) is 2.5mm, and the length of the grinding part (3) is 5 mm.
10. The special tungsten carbide rotary file for grinding the femoral condyle of the artificial joint as claimed in claim 1, wherein: the rotary file is made of HRC 45-50 tungsten carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020859499.2U CN212169199U (en) | 2020-05-20 | 2020-05-20 | Special tungsten carbide rotary file for polishing femoral condyle of artificial joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020859499.2U CN212169199U (en) | 2020-05-20 | 2020-05-20 | Special tungsten carbide rotary file for polishing femoral condyle of artificial joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212169199U true CN212169199U (en) | 2020-12-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020859499.2U Active CN212169199U (en) | 2020-05-20 | 2020-05-20 | Special tungsten carbide rotary file for polishing femoral condyle of artificial joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212169199U (en) |
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2020
- 2020-05-20 CN CN202020859499.2U patent/CN212169199U/en active Active
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