CN217579004U - Tool for heat treatment of long bolt - Google Patents
Tool for heat treatment of long bolt Download PDFInfo
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- CN217579004U CN217579004U CN202221269958.7U CN202221269958U CN217579004U CN 217579004 U CN217579004 U CN 217579004U CN 202221269958 U CN202221269958 U CN 202221269958U CN 217579004 U CN217579004 U CN 217579004U
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- long bolt
- heat treatment
- lower panel
- bolt
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Abstract
The utility model provides a frock is used in long bolt thermal treatment, the invention relates to a frock is used in bolt thermal treatment, the utility model discloses a solve long and thin bolt when thermal treatment, can't keep vertical state to carry out the problem of thermal treatment processing, the utility model discloses an upper panel, lower panel and a plurality of connecting rod, upper panel and lower panel parallel arrangement from top to bottom, connect through a plurality of connecting rods 3 between upper panel and the lower panel, a plurality of connecting rods set up along the circumferencial direction equipartition, and a plurality of bolts vertical hoist and mount are on the panel down. After the tool is used, the long bolt is always kept in a vertical state in the heat treatment and cooling processes, each transverse section is in the same state (temperature), stress difference cannot be generated due to temperature or other factors, and therefore deformation of the long bolt can be greatly reduced. The utility model belongs to the technical field of machining.
Description
Technical Field
The utility model relates to a bolt is frock for thermal treatment, concretely relates to stay bolt is frock for thermal treatment, the utility model relates to a machining technology field.
Background
The bolt is of importanceFastening pieceThe method is widely applied to the fields of machine tools, general machines, automobiles, engineering machinery, electric power engineering, petrochemical engineering, bridges, rail vehicle mining machinery, buildings and the like. Heat treatment is a key process for producing high-strength bolts, determines the final use performance of the bolts and can enable the high-strength fasteners to obtain the requirements of design.
In the quenching and tempering process, due to the high quenching temperature, a large thermal stress can be generated in the oil cooling stage after quenching, so that the long bolt is deformed, such as lateral bending, twist bending and the like. Moreover, the long bolt has a smaller diameter and weaker deformation resistance, so that the deformation is aggravated; in the machining process, because the long bolt is small in diameter and length, the generated machining stress can also cause the deformation of the long bolt in the machining process.
Therefore, for bolts with longer length and thinner diameter, the existing tool can not meet the requirements of the bolts in order to prevent the bolts from deforming seriously after heat treatment and requiring a vertical state for heat treatment.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve long and thin bolt when thermal treatment, can't keep the vertical state to carry out the problem of thermal treatment processing, and then provide a frock for long bolt thermal treatment.
The utility model discloses a solve the technical scheme that above-mentioned problem took and be:
the utility model discloses an upper panel, lower panel and a plurality of connecting rod, upper panel and lower panel parallel arrangement from top to bottom, connect through a plurality of connecting rods between upper panel and the lower panel, a plurality of connecting rods set up along the circumferencial direction equipartition, and the vertical hoist and mount of a plurality of bolts are on the panel down.
Furthermore, the upper panel and the lower panel are both circular plate bodies.
Furthermore, the upper end of each connecting rod is welded and fixed with the lower surface of the upper panel, and the lower end of each connecting rod is welded and fixed with the upper surface of the lower panel.
Further, the angle (a) between every two adjacent connecting rods is 36 degrees.
Furthermore, the upper surface of the lower panel is provided with an outer ring hole and an inner ring hole, which are sequentially arranged from outside to inside.
Furthermore, the outer ring holes are uniformly distributed along the circumferential direction through a plurality of first through holes.
Furthermore, the inner ring holes are uniformly distributed along the circumferential direction through a plurality of second through holes.
Furthermore, a lifting hole for lifting is formed in the middle of the upper surface of the upper panel.
The utility model has the advantages that:
frock two mainly used processes, quenching and tempering process and destressing annealing process promptly, the main action can make the long bolt carry out thermal treatment under the vertical state and process to reduce the deformation of long bolt by a wide margin.
After the tool is used, the long bolt is always kept in a vertical state in the heat treatment and cooling processes, each transverse section is in the same state (temperature), stress difference cannot be generated due to temperature or other factors, and therefore deformation of the long bolt can be greatly reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a bottom view of FIG. 1;
FIG. 4 is a schematic structural view of a bolt to be machined;
fig. 5 is a schematic view of the installation of the bolt to the lower panel.
Detailed Description
The first embodiment is as follows: the present embodiment is described with reference to fig. 1 to 5, and the tooling for heat treatment of long bolts according to the present embodiment includes an upper panel 1, a lower panel 2, and a plurality of connecting rods 3, the upper panel 1 and the lower panel 2 are arranged in parallel from top to bottom, the upper panel 1 and the lower panel 2 are connected by the plurality of connecting rods 3, the plurality of connecting rods 3 are uniformly distributed along the circumferential direction, and the plurality of bolts 4 are vertically hoisted on the lower panel 2.
The diameter of the upper panel is smaller than the diameter of a furnace opening of the pit furnace and larger than the diameter of a protruded lining in the furnace, so that the tool can be clamped on the lining in the furnace; the thickness of the upper panel is determined according to the load condition of the tool.
The diameter of the lower panel is smaller than that of the protruded lining in the shaft furnace, and the diameter of the hole on the lower panel can be adjusted according to the diameter of the bolt to be heat treated; the thickness of the lower panel is determined according to the load condition of the tool.
The diameter of the connecting rod is determined according to the load condition of the tool, the length of the connecting rod is determined according to the depth of the shaft furnace and the length of the bolt to be heat-treated, and the bolt to be heat-treated is ensured to be completely in an effective heat treatment area of the shaft furnace.
One end of the bolt is provided with a section of chuck with holes, the chuck with holes penetrates through the hole of the lower panel, and a pin 5 (the length of the pin is longer than the diameter of the hole of the lower panel) penetrates through the hole of the chuck of the bolt, so that the connection between the bolt and the tool is realized.
The second embodiment is as follows: the present embodiment will be described with reference to fig. 2 to 3, in which the upper panel 1 and the lower panel 2 are both circular plates.
Other components and connections are the same as those in the first embodiment.
The third concrete implementation mode: referring to fig. 1, the upper end of each tie bar 3 is welded to the lower surface of the upper panel 1, and the lower end of each tie bar 3 is welded to the upper surface of the lower panel 2. The connecting rod 3 is connected with the upper panel 1 and the lower panel 2 in an open-slope welding mode, and the welding line is 20 high.
Other components and connection relationships are the same as those in the first or second embodiment.
The fourth concrete implementation mode: referring to fig. 2, the angle (a) between every two adjacent connecting rods 3 in the present embodiment is 36 degrees. Connecting rod 3 sets up along the edge of panel down, does not influence the hoist and mount of bolt 4.
Other components and connection relationships are the same as those in the first, second or third embodiment.
The fifth concrete implementation mode is as follows: referring to fig. 3, the embodiment is described, in which an outer ring hole and an inner ring hole are formed in an upper surface of the lower panel 2, and the outer ring hole and the inner ring hole are sequentially formed from outside to inside.
Other components and connection relationships are the same as those in the first, second, third, or fourth embodiment.
The sixth specific implementation mode is as follows: referring to fig. 3, the outer ring holes of the present embodiment are uniformly distributed along the circumferential direction by a plurality of first through holes 2-1.
Other components and connection relationships are the same as those in the first, second, third, fourth, or fifth embodiment.
The seventh concrete implementation mode: referring to fig. 3, the inner ring holes of the present embodiment are uniformly distributed along the circumferential direction by a plurality of second through holes 2-2.
Other components and connection relationships are the same as those in the first, second, third, fourth, fifth or sixth embodiment.
The specific implementation mode is eight: referring to fig. 2, the embodiment is described, and a hanging hole 1-1 for hanging is formed in the middle of the upper surface of the upper panel 1.
Other components and connection relationships are the same as those in the first, second, third, fourth, fifth, sixth or seventh embodiment.
The specific implementation method nine: the size of the foundation bolt of the nuclear power unit is phi 70 multiplied by 3377mm, and the material is 25Cr2MoV. The bolt has the advantages that the blanking length is 3387mm, the blanking diameter is phi 80mm, after modulation processing is carried out by using the tool, the performance meets the standard requirement (the hardness is 241-245 HB), the integral deformation is 1.5mm, the allowance of a single side is not exceeded, and the drawing requirement is met.
The working principle is as follows:
during heat treatment, one end of a bolt 4 penetrates through a hole of the lower panel 2, a pin 5 (the length of the pin is longer than the diameter of the hole of the lower panel) penetrates through a hole of a bolt chuck to realize connection of the bolt 4 and a tool, the tool and the bolt are lifted up from a lifting hole 1-1 of the upper panel 1 by a lifting clamp and placed in an entry furnace to realize heat treatment of the bolt in a vertical state.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the preferred embodiment, it is not intended to limit the present invention, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and all those skilled in the art can make modifications or modifications equivalent embodiments without departing from the technical spirit of the present invention.
Claims (8)
1. The utility model provides a frock is used in long bolt thermal treatment which characterized in that: the utility model provides a frock is used in long bolt thermal treatment, it includes top panel (1), lower panel (2) and a plurality of connecting rod (3), top panel (1) and lower panel (2) parallel arrangement from top to bottom, connect through a plurality of connecting rod (3) between top panel (1) and lower panel (2), a plurality of connecting rod (3) set up along the circumferencial direction equipartition, and the vertical hoist and mount of a plurality of bolts (4) are under on panel (2).
2. The tool for the heat treatment of the long bolt according to claim 1, wherein: the upper panel (1) and the lower panel (2) are both circular plates.
3. The tooling for the heat treatment of the long bolt according to claim 1, characterized in that: the upper end of each connecting rod (3) is welded and fixed with the lower surface of the upper panel (1), and the lower end of each connecting rod (3) is welded and fixed with the upper surface of the lower panel (2).
4. The tool for the heat treatment of the long bolt according to claim 3, wherein: the angle (a) between every two adjacent connecting rods (3) is 36 degrees.
5. The tooling for the heat treatment of the long bolt according to claim 1, characterized in that: the upper surface of the lower panel (2) is provided with an outer ring hole and an inner ring hole which are sequentially arranged from outside to inside.
6. The tool for the heat treatment of the long bolt according to claim 5, wherein: the outer ring holes are uniformly distributed along the circumferential direction by a plurality of first through holes (2-1).
7. The tool for the heat treatment of the long bolt according to claim 5, characterized in that: the inner ring holes are uniformly distributed along the circumferential direction by a plurality of second through holes (2-2).
8. The tool for the heat treatment of the long bolt according to claim 1, wherein: the middle part of the upper surface of the upper panel (1) is provided with a lifting hole (1-1) for lifting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221269958.7U CN217579004U (en) | 2022-05-25 | 2022-05-25 | Tool for heat treatment of long bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221269958.7U CN217579004U (en) | 2022-05-25 | 2022-05-25 | Tool for heat treatment of long bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217579004U true CN217579004U (en) | 2022-10-14 |
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ID=83555111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221269958.7U Active CN217579004U (en) | 2022-05-25 | 2022-05-25 | Tool for heat treatment of long bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217579004U (en) |
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2022
- 2022-05-25 CN CN202221269958.7U patent/CN217579004U/en active Active
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