CN115922390A - Expansion core rod assembly for machining hard alloy soft blank - Google Patents
Expansion core rod assembly for machining hard alloy soft blank Download PDFInfo
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- CN115922390A CN115922390A CN202211622011.4A CN202211622011A CN115922390A CN 115922390 A CN115922390 A CN 115922390A CN 202211622011 A CN202211622011 A CN 202211622011A CN 115922390 A CN115922390 A CN 115922390A
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- core rod
- expansion core
- elastic ring
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Abstract
The invention relates to an expansion core rod assembly for processing hard alloy soft blanks, which comprises an expansion core rod handle part, an expansion core rod head part, an elastic ring and a screw, wherein the expansion core rod handle part comprises a product supporting section and a core rod clamping section, the outer diameter of the product supporting section is in clearance fit with an inner hole of a processed workpiece, and the core rod clamping section is clamped on a clamping jaw; one end of the product supporting section is provided with a counter bore matching section and an internal thread; the head of the expansion core rod is provided with a step on the exterior and a through hole on the interior, the elastic ring is arranged at the step during assembly, and the step is matched with the matching section; the screw passes through the through hole of the head of the expansion core rod and is screwed into the internal thread of the handle of the expansion core rod, and the head of the expansion core rod, the elastic ring and the handle of the expansion core rod are assembled into a whole; the screw is screwed to change the deformation of the elastic ring, the outer diameter of the compressed elastic ring changes, the compressed elastic ring contacts with the inner hole of the workpiece, and the inner wall of the compressed elastic ring exerts pressure to generate friction force so as to fix the workpiece. And (5) clamping once to finish the processing of the end face, the inner shape and the outer shape.
Description
Technical Field
The invention relates to an expansion core rod assembly for machining a soft hard alloy blank, which is used for machining the soft hard alloy blank before sintering and belongs to the technical field of hard alloy preparation.
Background
At present, a cemented carbide soft blank is obtained in a desired shape, and is mainly subjected to shaping by machining (turning, milling, etc.).
For the hard alloy soft blank with holes, a common method is to use a round bar-shaped metal core rod to penetrate through the inner holes, so that the round bar-shaped metal core rod and the inner holes are matched to a certain degree, and then the soft blank is fixed by clamping the core rod on equipment, thereby completing the processing target, which needs to prepare a large number of core rods to be matched with the inner holes with different sizes.
In the occasion of processing the inner hole, the part except the inner hole needs to be clamped for processing; when clamping the outer circle, the outer circle must have enough clamping surface.
The strength of the hard alloy soft blank is low, and when a clamp or a chuck with high hardness directly contacts the soft blank, the damage or the defect is easy to occur, so that the scrap is caused. In this regard, it is common practice to burn-in the soft blanks to increase the strength, resulting in a large consumption of material resources.
In conclusion, when the hard alloy soft blank is processed, the clamping range of a single core rod is small, and a large number of core rods need to be prepared, so that the production cost is overhigh; in addition, when the hard alloy soft blank is processed, the end face, the inner hole and the outer circle cannot be processed simultaneously, so that the clamping frequency is too many, and the efficiency is not high; in addition, when the hard alloy soft blank is processed, the outer diameter needs to be clamped when the inner mold is processed, and the hard alloy soft blank is easy to damage.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an expansion core rod assembly for machining a hard alloy soft blank.
The purpose of the invention is realized by the following technical scheme:
an expansion core rod component for processing hard alloy soft blanks is characterized in that: the expansion core rod handle comprises a product supporting section and a core rod clamping section, the outer diameter of the product supporting section is in clearance fit with an inner hole of a workpiece to be machined, and the core rod clamping section is clamped on a clamping jaw; one end of the product supporting section is provided with a counter bore matching section and an internal thread;
the head of the expansion core rod is provided with a step on the outer shape and a through hole on the inner shape, the elastic ring is arranged at the step during assembly, and the step is matched with the matching section;
the screw passes through the through hole of the head of the expansion core rod and is screwed into the internal thread of the handle of the expansion core rod, and the head of the expansion core rod, the elastic ring and the handle of the expansion core rod are assembled into a whole;
the screw is screwed to change the deformation of the elastic ring, the outer diameter of the pressed elastic ring changes, the pressed elastic ring contacts the inner hole of the workpiece, and the inner wall of the pressed elastic ring exerts pressure to generate friction force, so that the workpiece is fixed.
Further, the expansion core rod assembly for machining the hard alloy soft blank is characterized in that an expansion core rod connecting rod is arranged between the head of the expansion core rod and the handle of the expansion core rod, the expansion core rod connecting rod is provided with a step in the shape, a through hole is formed in the inner shape, an elastic ring is sleeved at the step during assembly, and the step is matched with the matching section of the handle of the expansion core rod; one end of the expansion core rod connecting rod is provided with a counter bore matching section which is matched with the step of the head part of the expansion core rod.
Further, the expansion core rod component for machining the hard alloy soft blank is characterized in that the size of the through hole is consistent with that of the internal thread.
Further, the expansion core rod assembly for machining the hard alloy soft blank is characterized in that the outer diameter of the elastic ring is close to that of the head of the expansion core rod.
Further, in the above expansion core rod assembly for machining the hard alloy soft blank, a transition part is arranged between the product supporting section and the core rod clamping section.
Further, the expansion core rod assembly for machining the hard alloy soft blank is characterized in that a counter bore is formed in the end face of the expansion core rod head.
Compared with the prior art, the invention has obvious advantages and beneficial effects, and is embodied in the following aspects:
the expansion core rod assembly can stably clamp a product within the range of 0-1 mm fluctuation of an inner hole, and can finish the processing of an end face, an inner shape and an outer shape under the condition of one-time clamping, the clamping frequency is low, and the clamping application range is wide; according to different designs, the processing of the two ends is completed, so that the repeated clamping labor is greatly reduced, and the efficiency is improved; the elastic ring is soft in material, so that the workpiece damage generated in clamping is effectively avoided; the parts are easy to obtain, and the screw and the elastic ring can be made of national standard parts. Has flexible and changeable combination modes, and meets the requirements of workpieces with different shapes.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1: the invention is a schematic diagram of an exploded structure of an expansion core bar assembly;
FIG. 2: a schematic view of the structure of the head of the expansion mandrel;
FIG. 3: the structure of the expansion core rod handle is schematically shown;
FIG. 4: an assembly schematic of an expansion core pin assembly;
FIG. 5: the schematic diagram of the deformation of the elastic ring when the screw is locked;
FIG. 6: the schematic diagram of the expansion core rod assembly when clamping the processed workpiece;
FIG. 7: the structural schematic diagram of the expansion core rod connecting rod is arranged between the head part of the expansion core rod and the handle part of the expansion core rod;
FIG. 8: the expansion core rod component is specifically applied to the schematic drawing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the directional terms and the sequence terms, etc. are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 to 6, the expansion core rod assembly for machining a hard alloy soft blank comprises an expansion core rod handle 4, an expansion core rod head 2, an elastic ring 3 and a screw 1, wherein the expansion core rod handle 4 comprises a product supporting section 13 and a core rod clamping section 15, the outer diameter of the product supporting section 13 is in clearance fit with the inner hole of a workpiece 6 to be machined and is used for supporting the workpiece 6 to be machined, and the core rod clamping section 15 is used for clamping a clamping jaw 5; a transition part 14 is arranged between the product supporting section 13 and the core rod clamping section 15, and one end of the product supporting section 13 is provided with a counter bore matching section 11 and an internal thread 12;
the expansion core rod head 2 is provided with a step 9 in the shape and a through hole 10 in the shape, the step 9 is matched with the matching section 11 during assembly, and the size of the through hole 10 is consistent with that of the internal thread 12; the end face of the head part 2 of the expansion core rod is provided with a counter bore 7;
the elastic ring 3 is arranged at the step 9 of the head part 2 of the expansion core rod, and the outer diameter is close to the outer diameter 8 of the head part 2 of the expansion core rod;
the screw 1 passes through a through hole 10 of the head 2 of the expansion core rod and is screwed into the internal thread 12 of the handle 4 of the expansion core rod, and the head 2 of the expansion core rod, the elastic ring 3 and the handle 4 of the expansion core rod are assembled into a whole;
when the screw 1 is screwed or loosened, the step 9 and the matching section 11 generate relative displacement, the pressure on the elastic ring 3 is changed, and the deformation of the elastic ring 3 is further changed;
the outer diameter of the elastic ring 3 subjected to pressure changes, and when the elastic ring contacts the inner hole of the processed workpiece 6, pressure is applied to the inner wall of the processed workpiece 6, so that friction force is generated, and the processed workpiece 6 can be fixed.
As shown in fig. 7, an expansion core rod connecting rod 16 may be disposed between the expansion core rod head 2 and the expansion core rod handle 4, the expansion core rod connecting rod 16 has a step in its outer shape and a through hole in its inner shape, an elastic ring is sleeved on the step during assembly, and the step is engaged with the engaging section 11 of the expansion core rod handle 4; one end of the expansion core rod connecting rod 16 is provided with a counter bore matching section which is matched with the step 9 of the expansion core rod head 2, and two or more elastic rings are sleeved on the expansion core rod connecting rod, so that the processed workpiece 6 is clamped and fixed more stably.
As shown in fig. 8, the machining operation of the inner and outer shapes can be completed by only one clamping operation when the hard alloy soft blank with the special-shaped inner and outer shapes is machined.
In conclusion, the expansion core rod assembly can stably clamp a product within the range of 0-1 mm fluctuation of the inner hole, finish the processing of the end surface, the inner shape and the outer shape under the condition of one-time clamping, and has the advantages of less clamping times and wide clamping application range; according to different designs, the processing of the two ends is completed, so that the repeated clamping labor is greatly reduced, and the efficiency is improved; the elastic ring is soft in material, so that the workpiece damage caused by clamping is effectively avoided; the parts are easy to obtain, and the screw and the elastic ring can adopt national standard parts. Has flexible and changeable combination modes and meets the requirements of workpieces with different shapes.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and shall be covered by the scope of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
Claims (6)
1. An expansion core rod component for processing hard alloy soft blanks is characterized in that: the expansion core rod comprises an expansion core rod handle part (4), an expansion core rod head part (2), an elastic ring (3) and a screw (1), wherein the expansion core rod handle part (4) comprises a product supporting section (13) and a core rod clamping section (15), the outer diameter of the product supporting section (13) is in clearance fit with an inner hole of a processed workpiece (6), and the core rod clamping section (15) is clamped on a clamping jaw (5); one end of the product supporting section (13) is provided with a counter bore matching section (11) and an internal thread (12);
the outer shape of the head (2) of the expansion core rod is provided with a step (9), the inner shape is provided with a through hole (10), the elastic ring (3) is arranged at the step (9) during assembly, and the step (9) is matched with the matching section (11);
the screw (1) passes through the through hole (10) of the head part (2) of the expansion core rod and is screwed into the internal thread (12) of the handle part (4) of the expansion core rod, and the head part (2) of the expansion core rod, the elastic ring (3) and the handle part (4) of the expansion core rod are assembled into a whole;
the screwing screw (1) changes the deformation amount of the elastic ring (3), the outer diameter of the compressed elastic ring (3) changes, the compressed elastic ring contacts with the inner hole of the processed workpiece (6), pressure is applied to the inner wall of the compressed elastic ring to generate friction force, and the processed workpiece (6) is clamped and fixed.
2. The expansion core rod assembly for machining of cemented carbide soft blanks as claimed in claim 1, wherein: an expansion core rod connecting rod (16) is arranged between the expansion core rod head part (2) and the expansion core rod handle part (4), the expansion core rod connecting rod (16) is provided with a step on the outer shape and a through hole on the inner shape, an elastic ring is sleeved at the step during assembly, and the step is matched with the matching section (11) of the expansion core rod handle part (4); one end of the expansion core rod connecting rod (16) is provided with a counter bore matching section which is matched with the step (9) of the expansion core rod head part (2).
3. The expansion core rod assembly for machining of cemented carbide soft blanks as claimed in claim 1, wherein: the size of the through hole (10) is consistent with that of the internal thread (12).
4. The expansion core rod assembly for machining of cemented carbide soft blanks as claimed in claim 1, wherein: the outer diameter of the elastic ring (3) is close to the outer diameter (8) of the expansion core rod head part (2).
5. The expansion core rod assembly for soft cemented carbide blank machining according to claim 1, wherein: a transition part (14) is arranged between the product supporting section (13) and the core bar clamping section (15).
6. The expansion core rod assembly for soft cemented carbide blank machining according to claim 1 or 2, wherein: the end face of the head (2) of the expansion core rod is provided with a counter bore (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211622011.4A CN115922390A (en) | 2022-12-16 | 2022-12-16 | Expansion core rod assembly for machining hard alloy soft blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211622011.4A CN115922390A (en) | 2022-12-16 | 2022-12-16 | Expansion core rod assembly for machining hard alloy soft blank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115922390A true CN115922390A (en) | 2023-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211622011.4A Pending CN115922390A (en) | 2022-12-16 | 2022-12-16 | Expansion core rod assembly for machining hard alloy soft blank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115922390A (en) |
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- 2022-12-16 CN CN202211622011.4A patent/CN115922390A/en active Pending
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